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WCDMA RAN

HandoverFeature Parameter Description

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of HuaweiTechnologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are the property of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned inthis document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the commercial contract made between Huawei and the customer. All orpartial products, services and features described in this document may not be within the purchased scope or the usage scope. Unlessotherwise agreed by the contract, all statements, information, and recommendations in this document are provided "AS IS" withoutwarranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document toensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty ofany kind, express or implied.

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Contents1 Introduction

1.1 Scope

1.2 Intended Audience

1.3 Change History

2 Overview of Handover

3 Intra-Frequency Handover

3.1 Overview

3.2 Intra-Frequency Handover Procedure

3.3 Intra-Frequency Handover Measurement

3.4 Intra-Frequency Handover Decision and Execution

3.5 Rate Reduction After an SHO Failure

3.6 Signaling Procedures for Intra-Frequency Handover

3.6.1 Intra-NodeB Intra-Frequency Soft Handover Signaling Procedure

3.6.2 Intra-RNC Inter-NodeB Intra-Frequency Soft Handover Signaling Procedure

3.6.3 Inter-RNC Intra-Frequency Soft Handover Signaling Procedure

3.6.4 Intra-RNC Inter-NodeB Intra-Frequency Hard Handover Signaling Procedure

3.6.5 Inter-RNC Intra-Frequency Hard Handover Signaling Procedure

4 Inter-Frequency and Inter-RAT Handover

4.1 Overview

4.2 Inter-frequency and Inter-RAT Handover Switches

4.3 Signaling Procedures for Inter-Frequency Handover

4.3.1 Inter-Frequency Handover Within One RNC

4.3.2 Inter-Frequency Handover Between RNCs

4.4 Signaling Procedures for Inter-RAT Handover

4.4.1 3G-to-2G Handover in the CS Domain

4.4.2 3G-to-2G Handover in the PS Domain

4.4.3 3G-to-2G Handover in Both CS Domain and PS Domain

4.4.4 2G-to-3G Handover in the CS Domain

4.4.5 2G-to-3G Handover in the PS Domain

5 Coverage or QoS Handover

5.1 Coverage or QoS Handover Procedure

5.2 Coverage or QoS Handover Measurement

5.2.1 Coverage or QoS Handover Measurement Report Modes

5.2.2 Coverage or QoS Handover Measurement Quantity

5.2.3 Coverage or QoS Handover Measurement Events

5.2.4 BSIC Verification Requirements for 2G Cells

5.3 Coverage or QoS Handover Decision and Execution

5.3.1 Inter-Frequency Coverage or QoS Handover Decision and Execution

5.3.2 3G-to-2G Coverage and QoS Handover Decision and Execution

5.4 Rules for 3G-to-2G Coverage or QoS Handover

5.5 3G-to-2G NACC

5.6 3G-to-2G PS Handover

5.7 2G-to-3G Handover

6 Load Handover

6.1 Inter-Frequency LDR Handover

6.1.1 Inter-Frequency LDR Handover Procedure

6.1.2 Inter-Frequency LDR Handover Measurement

6.1.3 Inter-Frequency LDR Handover Decision and Execution

6.2 Inter-RAT LDR Handover

6.2.1 Inter-RAT LDR Handover Procedure

6.2.2 Inter-RAT LDR Handover Measurement

6.2.3 Inter-RAT LDR Handover decision and Execution

6.3 Inter-RAT Service Handover

6.3.1 Switches for Inter-RAT Service Handover

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6.3.2 Inter-RAT Service Handover Procedure

6.4 Rules for Enabling Inter-RAT LDR or Service Handover

6.5 Interchanging Inter-RAT Load Information

7 HSPA Handover

7.1 HSDPA Handover

7.1.1 HSDPA Intra-Frequency Handover

7.1.2 HSDPA Inter-Frequency Handover

7.1.3 HSDPA Inter-RAT Handover

7.2 HSUPA Handover

7.2.1 HSUPA Intra-Frequency Handover

7.2.2 HSUPA Inter-Frequency Handover

7.2.3 HSUPA Inter-RAT Handover

7.3 HSPA+ Handover

7.3.1 Overview

7.3.2 Preselection Phase

7.3.3 Fallback Phase

7.3.4 Retry Phase

7.4 Anti-Frequent Serving Cell Change

7.5 HSPA Retry

8 HCS Handover

8.1 Overview

8.2 HCS Handover Procedure

8.3 UE Speed Estimation

8.4 HCS Handover Measurement

8.5 HCS Handover Execution

8.6 Signaling Procedure of HCS Handover

8.7 Interoperability Between HCS Handover and Other Handovers

9 Blind Handover

10 Handover Protection

10.1 Anti-Ping-Pong

10.2 Handover Retry

10.2.1 Inter-Frequency Handover Retry

10.2.2 Inter-RAT (3G to 2G) Handover Retry

10.3 Inter-RAT Multimedia Fallback

10.4 Transfering Event Report to Periodical Report

11 Neighboring Cell Combination

12 Compressed Mode

13 Parameters

14 Counters

15 Glossary

16 Reference Documents

1 Introduction

1.1 Scope

The document describes the handover functional area. It provides an overview of the main functions and goes into details regardinghandover.

1.2 Intended Audience

This document is intended for:

Personnel who are familiar with WCDMA basics

Personnel who need to understand handover

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Personnel who work with Huawei products

1.3 Change History

This section provides information on the changes in different document versions.

There are two types of changes, which are defined as follows:

Feature change: refers to the change in the handover feature.

Editorial change: refers to the change in wording or the addition of the information that was not described in the earlier version.

Document Issues

The document issues are as follows:

02 (2011-10-30)

01 (2011-04-30)

Draft B (2011-03-30)

Draft A (2010-12-30)

02 (2011-10-30)

This is the document for the second commercial release of RAN13.0.

Compared with issue 01 (2011-04-30) of RAN13.0, this issue adds description about inter-RAT blind handover. For details, see 9 “BlindHandover.”

01 (2011-04-30)

This is the document for the first commercial release of RAN13.0.

Compared with issue Draft B (2011-03-30) of RAN13.0, this issue has no change.

Draft B (2011-03-30)

This is the draft of the document for RAN13.0.

Compared with Draft A (2010-12-30) of RAN13.0, this issue has no changes.

Draft A (2010-12-30)

This is the draft of the document.

Compared with issue 02 (2010-06-20) of RAN12.0, this issue optimizes the description.

2 Overview of Handover

Handover is a basic function of the cellular mobile network. The purpose of handover is to ensure that a UE in CELL_DCH state is servedcontinuously when it moves.

Figure 2-1 shows the handovers supported by the Universal Mobile Telecommunications System (UMTS), which include intra-frequencyhandover, inter-frequency handover, and inter-RAT handover.

Figure 2-1 Handovers supported by the UMTS

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3 Intra-Frequency Handover

3.1 Overview

Intra-frequency handover is classified into:

Intra-frequency soft handover: Multiple radio links are connected to the UE at the same time.

Intra-frequency hard handover: Only one radio link is connected to the UE.

Intra-Frequency Soft Handover

Intra-frequency soft handover is more commonly used than intra-frequency hard handover. The types of intra-frequency soft handover areas follows:

Intra-NodeB soft handover (WRFD-020201 Intra Node B Softer Handover, also known as softer handover)

Intra-RNC inter-NodeB soft handover (WRFD-020202 Intra RNC Soft Handover)

Inter-RNC soft handover (WRFD-020203 Inter RNC Soft Handover)

Intra-frequency soft handover is characterized by the function that the UE can be connected to multiple Universal Terrestrial Radio AccessNetwork (UTRAN) access points at the same time. Addition and/or release of radio links are controlled by the ACTIVE SET UPDATEprocedure.

Table 3-1 Differences between soft handover and softer handover

Item Softer Handover Soft Handover

Scenario When the UE is in the overlappedcoverage area of multiple neighboringcells of a NodeB with combined RLs

When the UE communicates withmultiple cells by setting up multiple

When the UE is in the overlapped coveragearea of two neighboring cells of differentNodeBs

When the UE communicates with different cellsby setting up multiple channels over the Uu

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channels over the Uu interface interface

Uplink signal Using maximum-ratio combination Using selective combination

Downlinksignal

Using maximum-ratio combination Using maximum-ratio combination

Resource use Occupying less Iub bandwidth Occupying more Iub bandwidth

The HoSwitch: HO_INTRA_FREQ_SOFT_HO_SWITCH parameter is used to determine whether to enable both soft handover and softerhandover. By default, this switch is set to ON, indicating that both soft handover and softer handover are enabled. After the RNC receivesthe event 1A, 1B, 1C, or 1D report, it initiates the corresponding soft handover procedure for the UE. For example, the RNC can add ordelete links.

The DivCtrlField parameter indicates whether maximum-ratio combination is enabled in the uplink during softer handover. When theNodeB decides not to perform maximum-ratio combination (softer combination), the RNC performs selective combination.

NodeB requires that all cells in softer handover for a UE must be configured in one uplink resource group. For 3900 series, NodeB requiresthat not only all cells in softer handover for a UE are configured in one uplink resource group but also in one downlink resource group.

Intra-Frequency Hard Handover

Intra-frequency hard handover (WRFD-020301 Intra Frequency Hard Handover) refers to a handover where all the old radio links arereleased before the new radio links are established. Compared with soft handover, intra-frequency hard handover uses fewer resources.

The scenarios of intra-frequency hard handover are as follows:

No Iur interface is present between RNCs. In this scenario, intra-frequency hard handover instead of soft handover can be performedbetween two RNCs.

The intra-frequency soft handover fails and intra-frequency hard handover is allowed.

When intra-frequency soft handover fails because of a congestion problem of the target cell, the RNC tries an intra-frequency hardhandover.

The HoSwitch: HO_INTRA_FREQ_HARD_HO_SWITCH parameter is used to determine whether to enable intra-frequency hard handover.By default, this switch is set to ON.

Inter RNC Handover

When the target cell under the target RNC fulfils the criteria for intra-frequency soft handover, intra- or inter-frequency hard handover, theconditions that the handover over Iur is triggered are as follows:

Whether the Iur interface is available depends on the setting of the following two parameters according to handover types:

Whether intra- or inter- frequency hard handover is allowed over the Iur interface depends on the setting of the HHOTRIG parameter.

Whether inter RNC soft Handover is allowed depends on the setting of the SHOTRIG parameter.

The SHOTRIG parameter consists of three sub-switches:

CS_SHO_SWTICH: If CS_SHO_SWTICH is checked, soft handover for CS service over the Iur interface is allowed.

HSPA_SHO_SWTICH: If HSPA_SHO_SWTICH is checked, soft handover for HSPA service over the Iur interface is allowed.

NON_HSPA_SHO_SWTICH: If NON_HSPA_SHO_SWTICH is checked, soft handover for non-HSPA PS service over the Iur interface isallowed.

If the RRC connection has been set up but the Radio Bearers (RBs) have not, whether a cross-Iur soft handover can be executed isdetermined by HoSwitch: HO_MC_SIGNAL_IUR_INTRA_SWITCH parameter. Only if the switch is set to ON, can the cross-Iur softhandover be executed.

3.2 Intra-Frequency Handover Procedure

The intra-frequency handover procedure involves three phases: handover measurement, handover decision, and handover execution.

After the UE transits to the CELL_DCH state in connected mode during a call, the RNC sends a MEASUREMENT CONTROL message toinstruct the UE to take measurements and report the measurement event results.

The MEASUREMENT CONTROL message carries the following information:

Event trigger threshold

Hysteresis value

Event trigger delay time

Neighboring cell list

Upon the reception of an event report from the UE, the RNC makes a handover decision and performs the corresponding handover, asshown in Figure 3-1.

Figure 3-1 Intra-frequency handover procedure

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3.3 Intra-Frequency Handover Measurement

In the measurement phase, the UE takes measurements according to the MEASUREMENT CONTROL message received from the RNC.When the event triggering conditions are met, the UE sends measurement reports to the RNC according to the rules defined in theMEASUREMENT CONTROL message.

Intra-Frequency Handover Measurement Quantities

Intra-frequency handover uses Ec/No or RSCP of the CPICH as the measurement value. Intra-frequency handover measurement quantitycan be configured through the parameter IntraFreqMeasQuantity.

Intra-Frequency Handover Measurement Events

In intra-frequency handover, the UE reports measurement results to the RNC through event reporting.

Event Description

1A A primary CPICH enters the reporting range. This indicates that the quality of a cell isclose to the quality of the best cell in the active set. A relatively high combined gain can beachieved when the cell is added to the active set.

1B A primary CPICH leaves the reporting range. This indicates that a cell has a lower qualitythan the best cell in the active set. The cell has to be deleted from the active set.

1C A non-active primary CPICH becomes better than an active primary CPICH. This indicatesthat the quality of a cell is better than the quality of the worst cell in the active set. TheRNC replaces a cell in the active set with a cell in the monitored set.

1D The best cell changes.

Triggering of Event 1A

Event 1A is triggered under the following condition:

10 x Log (MNew) + CIONew ³ W x 10 x Log ( ) + (1 - W) x 10 x Log (MBest) - (R1a - H1a/2)

MNew is the measurement value of the cell in the reporting range.

CIONew is equal to the sum of CIO and CIOOffset, which adjusts the cell boundary in the handover algorithms. This parameter is

determined by network planning according to actual environment configuration. To facilitate handover in neighboring cell configuration,the parameter is set as a positive value; otherwise, the parameter is set as a negative value.

W represents weighted factor, which is determined by the parameter Weight. The total quality of the best cell and the active set isspecified by W.

Mi is the measurement value of a cell in the active set.

NA is the number of cells not forbidden to affect the reporting range in the active set. The parameter CellsForbidden1A indicates

whether adding the cell to the active set affects the relative threshold of event 1A.

MBest is the measurement value of the best cell in the active set.

R1a is the reporting range or the relative threshold of soft handover. The threshold parameters of the CS non-VP service, VP service,

and PS service are as follows:

− IntraRelThdFor1ACSVP

− IntraRelThdFor1ACSNVP

− IntraRelThdFor1APS

For the PS and CS combined services, the threshold for CS services is used.

For the single signaling connection of the UE, the threshold for CS services is used.

H1a represents HystFor1A the hysteresis value of event 1A

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Figure 3-2 shows the triggering of event 1A. In this procedure, the default parameter values are used.

If the signal quality of a cell that is not in the active set is higher than Th1A for a period of time specified by TrigTime1A (that is, Time totrigger in Figure 3-2), the UE reports event 1A.

Th1A = (CPICH Ec/No of the best cell in the active set) - (reporting range for event 1A)

If Weight > 0, then Th1A = (general signal quality of all the cells in the active set) - (reporting range for event 1A).

Reporting range for event 1A is equal to the value of IntraRelThdFor1ACSVP, IntraRelThdFor1ACSNVP, or IntraRelThdFor1APS.

Figure 3-2 Triggering of event 1A

A: signal quality curve of the best cell in the active set

B: signal quality curve of a cell in the monitored set

C: curve of Th1A

Triggering of Event 1B

Event 1B is triggered under the following condition:

10 x Log (Mold) + CIOold £ W x 10 x Log ( ) + (1-W) x 10 x Log (MBest) - (R1b+H1b/2)

MOld is the measurement value of the cell that becomes worse.

CIOOld is equal to the sum of CIO and CIOOffset, which is the offset between the cell in the reporting range and the best cell in the active

set.

W represents weighted factor, used to weight the quality of the active set. The total quality of the best cell and the active set is specifiedby the parameter Weight.

Mi is the measurement value of a cell in the active set.

NB is the number of cells not forbidden to affect the reporting range in the active set. The parameter CellsForbidden1B indicates

whether adding the cell to the active set affects the relative threshold of event 1B.

MBest is the measurement value of the best cell in the active set.

R1b is the reporting range or the relative threshold of soft handover. The threshold parameters of the CS non-VP service, VP service,and PS services are as follows:

− IntraRelThdFor1BCSVP

− IntraRelThdFor1BCSNVP

− IntraRelThdFor1BPS

For the PS and CS combined services, the threshold for CS services is used.

If the UE currently has only signaling connections, the threshold for CS services is used.

H1b is the hysteresis value of event 1B, which is determined by the parameter Hystfor1B.

Configuration rule and restriction

The value of IntraRelThdFor1BCSNVP has to be larger than that of IntraRelThdFor1ACSNVP.

The value of IntraRelThdFor1BCSVP has to be larger than that of IntraRelThdFor1ACSVP.

The value of IntraRelThdFor1BPS has to be larger than that of IntraRelThdFor1APS.

Figure 3-3 shows the triggering of event 1B. In this procedure, the default parameter values are used.

Figure 3-3 Triggering of event 1B

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A: signal quality curve of the best cell in the active set

B: signal quality curve of the best cell in the monitored set

C: curve of Th1B

Th1B = (CPICH Ec/No of the best cell in the active set) - (reporting range for event 1B)

Where,

Reporting range for event 1B is equal to the value of IntraRelThdFor1BCSVP, IntraRelThdFor1BCSNVP, or IntraRelThdFor1BPS.

If Weight > 0, then Th1B = (general signal quality of all the cells in the active set) - (reporting range for event 1B).

If the signal quality of a cell in the active set is lower than Th1B for a period of time specified by TrigTime1B (Time to trigger in the figure),

the UE reports event 1B.

Triggering of Event 1C

Event 1C is triggered under the following condition:

10 x Log (MNew) + CIONew ³ 10 x Log (MInAS) + CIOInAS + H1c/2

MNew is the measurement value of the cell in the reporting range.

CIONew is the cell individual offset value of the cell in the reporting range. It is equal to the sum of CIO and CIOOffset, which is the offsetbetween the cell in the reporting range and the best cell in the active set.

MInAS is the measurement value of the worst cell in the active set.

H1c is the hysteresis value of event 1C, which is determined by the parameter Hystfor1C.

Figure 3-4 shows the triggering of event 1C. In this procedure, the default parameter values are used.

Figure 3-4 Triggering of event 1C

A: signal quality curve of the best cell in the active set

B: signal quality curve of a cell in the active set

C: signal quality curve of the worst cell in the active set

D: signal quality curve of a cell in the monitored set

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E: curve of Th1C

Th1C = (CPICH Ec/No of the worst cell in the active set) + (hysteresis/2)

Where,

Hysteresis is equal to the value of Hystfor1C.

If the signal quality of a cell not in the active set is higher than Th1C for a period of time specified by TrigTime1C (Time to trigger in the

figure), the UE reports event 1C, as shown in the figure.

The UE reports event 1C for qualified cells after the number of cells in the active set reaches the maximum value. The maximum number ofcells in the active set can be set by the MaxCellInActiveSet parameter.

Triggering of Event 1D

Event 1D is triggered under the following condition:

10 x Log (MNotBest) + CIONotBest ³ 10 x Log (MBest) + CIOBest + H1d/2

MNotBest is the measurement value of a cell that is not the best cell.

CIONotBest is equal to the sum of CIO and CIOOffset, which is the offset between the cell in the reporting range and the best cell in the

active set.

MBest is the measurement value of the best cell in the active set.

CIOBest is the cell individual offset value of the best cell. This parameter is not used for event 1D.

H1d is the hysteresis value of event 1D, which is determined by the parameter Hystfor1D.

Figure 3-5 shows the triggering of event 1D. In this procedure, the default parameter values are used.

Figure 3-5 Triggering of event 1D

A: signal quality curve of the best cell in the active set

B: signal quality curve of a cell in the active set or the monitored set

C: curve of Th1D

Hysteresis is equal to the value of Hystfor1D.

If the signal quality of a cell not in the active set is higher than Th1D for a period of time specified by TrigTime1D (Time to trigger in the

figure), the UE reports event 1D.

3.4 Intra-Frequency Handover Decision and Execution

The intra-frequency handover decision and execution procedure depends on the different measurement events that the RNC receives.

When receiving an event 1A, 1C, or 1D report, the RNC adds a target cell to the active set only when the CPICH Ec/No of the target cell ishigher than the absolute threshold SHOQualmin.

Table 3-2 lists different types of intra-frequency handover decision and execution based on different events.

Table 3-2 Intra-frequency handover decision and execution

Event Decision and Execution

1A When receiving an event 1A report, the RNC decides whether to add a cell.

For event 1A, the UE can report more than one cell in the event list in one measurementreport. These cells are in the list of the MEASUREMENT CONTROL message, and they aresequenced in descending order of measurement quantity.

For the cells in the list, the RNC adds the radio link to the active set only if the number of cellsin the active set does not reach the maximum value. This operation is not required if thenumber of cells in the active set reaches a specified value.

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1B When receiving an event 1B report, the RNC decides whether to delete a cell.

For event 1B, if there is more than one radio link in the active set, the RNC decides whetherto delete a radio link. This operation is not required if there is only one radio link in the activeset.

1C When receiving an event 1C report, the RNC decides whether to change the worst cell.

For event 1C, the UE reports a list that contains good cells and the cells to be replaced, andsequences the cells in descending order by measurement quantity. After receiving the listfrom the UE, the RNC replaces the bad cells in the active set with the good cells in the list.

1D As stipulated in related protocols, an event 1D report includes information about only one cell.This cell can be listed in an active set or a monitored set. The RNC learns that the quality ofthis cell is better than that of the serving cell and takes one of the following actions:

If the reported cell is in the active set, the RNC decides whether to change the best cell orreconfigure measurement control.

If the reported cell is in the monitored set, then:

If the number of cells in the active set has not reached the maximum value, the RNC adds

the cell to the active set.

If the number of cells in the active set has reached the maximum value, the RNC replaces

the worst cell in the active set with the reported cell.

The best cell is changed to the reported cell.

The RNC determines whether the intra-frequency hard handover scenarios are applicable. Ifany scenario is applicable, the RNC performs an intra-frequency hard handover.

3.5 Rate Reduction After an SHO Failure

If the radio link fails to be added for a soft handover, the rate reduction is triggered for R99 Non Real Time (NRT) services to increase theprobability of a successful soft handover.

Estimation Procedure for Rate Reduction

If the RNC receives a 1A, 1C, or 1D measurement report, the RNC tries to add the corresponding cell to the active set. If the addition fails,the RNC performs the estimation procedure for rate reduction.

Figure 3-6 Estimation procedure for rate reduction

1. The RNC evaluates whether the measurement quantity of the cell failing to be admitted meets the condition of rate reduction.

− If the condition is met, the RNC performs a rate reduction process for the access service immediately, as described in the next sectionProcedure of Rate Reduction Execution.

− If the condition is not met, the RNC performs the next step (Step 2).

The condition of rate reduction is as follows: Mnew > Mbest_cell - RelThdForDwnGrd

− Mnew is the CPICH Ec/No measurement value of the cell failing to be admitted.

− Mbest_cell is the CPICH Ec/No measurement value of the best cell in the active set.

− RelThdForDwnGrd is a parameter.

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2. The RNC evaluates whether the number of SHO failures in the cell exceeds the ShoFailNumForDwnGrd.

If the number of SHO failures in the cell is smaller than the ShoFailNumForDwnGrd:

− If the timer has not been started, the RNC starts it.

− If the timer has been started, the RNC increments the SHO failure counter by one.

The timer length is set through the parameter ShoFailPeriod.

The SHO failure counter of a cell is used to record the number of SHO failures in this cell. For each UE, the RNC records the number ofSHO failures in three cells at most. For SHO failures in any other cells, the RNC does not record the number.

Before the SHO failure evaluation timer expires, no action is taken and the RNC waits for the next measurement report period.

When the SHO failure evaluation timer expires, the RNC sets the SHO failure counter of the corresponding cell to 0 and ends theevaluation.

If the number of SHO failures in the cell is larger than or equal to the parameter ShoFailNumForDwnGrd, the RNC performs a ratereduction process for the access service,

Procedure of Rate Reduction Execution

Figure 3-7 Procedure of rate reduction execution

1. The RNC performs a rate reduction process for the access service. The method of determining the access rate after the rate reductionis the same as that described in Rate Negotiation of Load Control Feature Parameter Description.

2. After the rate reduction succeeds, the RNC immediately attempts to add this cell to the active set without measurement:

If the cell succeeds in admitting the UE, the RNC adds the radio link and sets the SHO failure counter of the cell to 0 and ends theexecution.

If the cell fails to admit the UE, the RNC starts the penalty timer (DcccShoPenaltyTime) to avoid an increase in the rate triggered byDCCC within the period. Also in this period, the RNC sets the SHO failure counter of the cell to 0 and ends the execution.

If the RNC fails to perform a soft handover again, it performs the estimation procedure and the execution procedure, as previouslydescribed.

3.6 Signaling Procedures for Intra-Frequency Handover

3.6.1 Intra-NodeB Intra-Frequency Soft Handover Signaling Procedure

This section describes the signaling procedure for intra-frequency soft handover within a NodeB.

Figure 3-8 shows the procedure for intra-frequency soft handover when the UE moves from one cell to another cell within the same NodeB.

Figure 3-8 Procedure for intra-NodeB intra-frequency soft handover

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The connections involved in the intra-NodeB intra-frequency softer handover change are as follows:

Before the softer handover, only cell 1 is connected to the UE.

During the softer handover, both cell 1 and cell 2 are connected to the UE.

After the softer handover, only cell 2 is connected to the UE. Cell 1 is removed from the active set.

Figure 3-9 Signaling procedure for intra-NodeB intra-frequency soft handover

3.6.2 Intra-RNC Inter-NodeB Intra-Frequency Soft Handover Signaling Procedure

This section describes the signaling procedure for intra-RNC inter-NodeB intra-frequency soft handover.

Figure 3-8 shows the procedure for intra-RNC inter-NodeB intra-frequency soft handover.

Figure 3-10 Procedure for intra-RNC inter-NodeB intra-frequency soft handover

Before the soft handover, only NodeB 1 is connected to the UE.

During the soft handover, both NodeBs are connected to the UE.

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After the soft handover, only NodeB 2 is connected to the UE. The active set of NodeB 1 is removed.

Figure 3-11 Signaling procedure for intra-RNC inter-NodeB intra-frequency soft handover

3.6.3 Inter-RNC Intra-Frequency Soft Handover Signaling Procedure

This section describes the signaling procedure for inter-RNC intra-frequency soft handover.

Figure 3-8 shows the procedure for inter-RNC intra-frequency soft handover.

Figure 3-12 Procedure for inter-RNC intra-frequency soft handover

Before the soft handover, the UE is connected to NodeB 1 and NodeB 2.

After the SRNC makes a soft handover decision, it sets up a connection between NodeB 3 under another RNC and the UE, and releasesthe connection between NodeB 1 and the UE.

Figure 3-13 Signaling procedure for inter-RNC intra-frequency soft handover

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3.6.4 Intra-RNC Inter-NodeB Intra-Frequency Hard Handover Signaling Procedure

The signaling procedure of intra-NodeB intra-frequency hard handover is similar to that of Intra-RNC inter-NodeB intra-frequency hardhandover. This section describes the signaling procedure for only the intra-RNC inter-NodeB intra-frequency hard handover.

Figure 3-14 Procedure for intra-RNC inter-NodeB intra-frequency hard handover

Figure 3-15 Signaling procedure for intra-RNC inter-NodeB intra-frequency hard handover

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As shown in Figure 3-15, NodeB 1 is the source NodeB and NodeB 2 is the target NodeB.

3.6.5 Inter-RNC Intra-Frequency Hard Handover Signaling Procedure

Figure 3-16 shows the procedure for intra-frequency hard handover when a UE moves from one NodeB in an SRNC to another NodeB in aDRNC.

Figure 3-16 Procedure for inter-RNC intra-frequency hard handover

Figure 3-17 Signaling procedure for inter-RNC intra-frequency hard handover

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As shown in Figure 3-17, NodeB 1 is the source NodeB and NodeB 2 is the target NodeB.

4 Inter-Frequency and Inter-RAT Handover

4.1 Overview

Based on the handover triggering causes, the inter-frequency and Inter-RAT handover falls into five categories, as described in Table 4-1.

Inter-RAT handover refers to the handover performed between 3G network and 2G network.

This section mainly describes the 3G-to2G coverage handover and QoS handover. Except the cause of the triggering is different, thehandover procedure is the same for the coverage handover and QoS handover.

Table 4-1 Types of inter-frequency and inter-RAT handover

Type Description

Coveragehandover

Coverage handover involves the following features:

WRFD-020302 Inter Frequency Hard Handover Based on Coverage

WRFD-020303 Inter-RAT Handover Based on Coverage

If a moving UE leaves the coverage of the current frequency, the RNC needs to triggerthe coverage-based inter-frequency or inter-RAT handover to avoid call drops.

For details, see 5 Coverage or QoS Handover.

QoShandover

QoS handover involves the following features:

WRFD-020304 Inter Frequency Hard Handover Based on DL QoS

WRFD-020309 Inter-RAT Handover Based on DL QoS

If the link quality becomes worse, the Link Stability Control Algorithm may trigger theQoS-based inter-frequency or inter-RAT handover to avoid call drops.

For details, see 5 Coverage or QoS Handover.

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LDRhandover

When the LDR function detects the basic congestion, the RNC chooses some UEs andperforms the inter-frequency or inter-RAT handover according to user priorities andservice priorities to balance the load between inter-frequency or inter-RAT cells.

For details, see 6 Load Handover.

Servicehandover

Service handover involves the feature WRFD-020305 Inter-RAT Handover Based onService

Based on layered services, the traffic of different classes is handed over to differentsystems. For example, when an Adaptive Multi Rate (AMR) speech service isrequested, this service can be handed over to the 2G network.

For details, see 6 Load Handover.

HCShandover

HCS handover involves the feature WRFD-021200 HCS.

Inter-frequency or inter-RAT handover can be triggered by the UE speed estimationalgorithm of the HCS. To reduce frequent handovers, the UE at a higher speed ishanded over to a cell under a larger coverage, whereas the UE at a lower speed ishanded over to a cell under a smaller coverage.

For details, see 8 HCS Handover.

4.2 Inter-frequency and Inter-RAT Handover Switches

Some switches are important for inter-frequency handover because they decide whether the handover can be performed successfully.These switches are the parameter values of handover algorithm switches in the command SET UCORRMALGOSWITCH, as describedbelow.

HOSWITCH > HO_INTER_FREQ_HARD_HO_SWITCH: The switch decides whether the RNC allows inter-frequency handover.

HOSWITCH > HO_INTER_RAT_PS_OUT_SWITCH: The switch decides whether the RNC allows inter-RAT handover of the PS domain fromthe UTRAN.

HOSWITCH > HO_INTER_RAT_CS_OUT_SWITCH: The switch decides whether the RNC allows inter-RAT handover of the CS domainfrom the UTRAN.

HHOTRIG: The switch decides whether intra- or inter- frequency hard handover is allowed over the Iur interface.

HOSWITCH > HO_MC_SIGNAL_SWITCH: The switch decides when the RNC performs the active set signal quality measurement beforethe RB setup. If the UE is at the cell verge or the signal is weak signals after accessing the network, the RNC can trigger inter-frequency orinter-RAT handover when the UE sets up the RRC.

If the switch is set to ON, the RNC initiates the active set quality measurement after the RRC connection setup is completed (before theRB setup).

If the switch is set to OFF, the RNC initiates the active set quality measurement after the RB setup is completed.

The switch is set to OFF by default.

HOSWITCH > HO_MC_MEAS_BEYOND_UE_CAP_SWITCH: The switch decides whether the neighboring cell will be sent in the inter-frequency measurement control message when the frequency of the neighboring cell is not included in the measurement capability of theUE. The reported measurement capability of the UE is not the same as the actual measurement capability of the UE. Measurementcapability at some frequencies may not be reported due to the limitation of the version of UE protocol.

If the switch is set to ON, the RNC sends the inter-frequency measurement control message with the neighboring cell, whose frequency isnot included in the measurement capability of the UE.

If the switch is set to OFF, the RNC sends the inter-frequency measurement control message without the neighboring cell, whosefrequency is not included in the measurement capability of the UE.

The switch is set to OFF by default.

4.3 Signaling Procedures for Inter-Frequency Handover

4.3.1 Inter-Frequency Handover Within One RNC

Figure 4-1 shows the inter-frequency handover for a UE that moves from NodeB 1 to NodeB 2 within one RNC. Before the handover, theUE sets up a connection to NodeB 1. After the handover, the UE sets up a connection to NodeB 2.

The signaling procedure of inter-frequency handover within one NodeB is similar to that between NodeBs within one RNC.

Figure 4-1 Inter-frequency handover between NodeBs within one RNC

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Figure 4-2 Signaling procedure for inter-frequency handover between NodeBs within one RNC

As shown in Figure 4-2, NodeB 1 is the source NodeB, whereas NodeB 2 is the target NodeB. From step 1 through step 6, a newconnection is set up. From step 7 through step 9, the original connection is released.

4.3.2 Inter-Frequency Handover Between RNCs

Figure 4-3 shows the signaling procedure for inter-frequency hard handover for a UE that moves from a NodeB to another NodeB betweenthe RNCs. Before the handover, the UE sets up a connection to NodeB 1. After the handover, the UE sets up a connection to NodeB 2.

Figure 4-3 Inter-frequency hard handover between the RNCs

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Figure 4-4 Signaling procedure for inter-frequency hard handover between the RNCs

NodeB 1 is the source NodeB, whereas NodeB 2 is the target NodeB. From step 1 through step 10, a new connection is set up. From step11 through step 13, the original connection is released.

4.4 Signaling Procedures for Inter-RAT Handover

4.4.1 3G-to-2G Handover in the CS Domain

Figure 4-5 shows the signaling procedure for the 3G-to-2G handover in the CS domain. The 2G messages shown in Figure 4-5 are foryour reference only.

Figure 4-5 3G-to-2G handover in the CS domain

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4.4.2 3G-to-2G Handover in the PS Domain

When a UE in idle mode or connected mode, if the SGSN changes with the shift of the system that the UE accesses from 3G network to 2Gnetwork, the inter-SGSN handover will be performed.

The handover procedures are different in the following two cases:

When the UE is in CELL_DCH state

The 3G-to-2G handover in the PS domain is triggered after the UTRAN sends a CELL CHANGE ORDER FROM UTRAN message.

When the UE is in CELL_FACH, CELL_PCH, or URA_PCH state

The 3G-to-2G handover in the PS domain is triggered through the cell reselection.

The following figure shows an example of handover for the UE in CELL_FACH, CELL_PCH, or URA_PCH state. When the UE is in idlemode, the cell reselection procedure does not include the elementary procedures marked "UE CONNECTED" in Figure 4-6.

Figure 4-6 Example of the 3G-to-2G handover in the PS domain

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4.4.3 3G-to-2G Handover in Both CS Domain and PS Domain

This section describes the 3G-to-2G handover in both CS domain and PS domain in detail.

Inter-RAT Handover in Both CS Domain and PS Domain

For a UE in CELL_DCH state using both CS and PS domain services, the inter-RAT handover procedure is based on the measurementreports from the UE but is initiated from the UTRAN.

The UE performs the inter-RAT handover from UTRA RRC connected mode to GSM connected mode first. After the UE sends aHANDOVER COMPLETE message to the GSM/BSS, the UE initiates a temporary block procedure towards the GPRS to suspend the GPRSservices. After the CS domain services are released on the GSM side, the inter-RAT handover in the PS domain is initiated and thencompleted.

If the inter-RAT handover from UTRA RRC Connected Mode to GSM Connected Mode succeeds, the handover is regarded as successful,no matter whether the UE initiates a temporary block procedure towards the GPRS.

In case of inter-RAT handover failure, the UE may go back to the UTRA RRC Connected Mode and re-establish the connection in theoriginal state.

SGSN Service Suspend and Resume

When the CS connection is terminated, the BSS may send a RESUME message to the SGSN. However, resume is impossible since theradio access system has changed. Therefore, the SGSN acknowledges the resume through a RESUME NACK message.

The UE sends a ROUTING AREA UPDATE REQUEST message to the SGSN to resume the GPRS service. The update mode depends onthe network operation mode in use.

Figure 4-7 Intra-SGSN service suspend and resume

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Figure 4-8 Inter-SGSN service suspend and resume

4.4.4 2G-to-3G Handover in the CS Domain

When a GSM cell has a neighboring UMTS cell, the measurement control information is contained in the system information. The dual-mode MS performs the inter-RAT measurement in idle timeslots and reports the measurement result. Then, the BSC decides whether tostart the inter-RAT handover according to the measurement result.

The GSM system uses time division multiple access technology, and the inter-RAT measurement is performed in idle timeslots. Therefore,the GSM need not support the compressed mode.

Figure 4-9 2G-to-3G handover in the CS domain

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4.4.5 2G-to-3G Handover in the PS Domain

Figure 4-10 shows the 2G-to-3G handover in the PS domain.

Figure 4-10 2G-to-3G handover in PS domain

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5 Coverage or QoS Handover

If a moving UE leaves the coverage area of the current frequency or the link quality degrades, the RNC triggers the coverage-based orQoS-based inter-frequency or inter-RAT handover to avoid call drops. The QoS handover procedure is the same as the coveragehandover procedure.

5.1 Coverage or QoS Handover Procedure

Figure 5-1 shows the procedure for the coverage or QoS handover.

Figure 5-1 Coverage or QoS handover procedure

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In the triggering phase

If the CPICH of the current cell becomes worse, the UE reports the event 2D. Then the RNC initiates the coverage handover.

If the link quality of the current service deteriorates, the Link Stability Control Algorithm makes a QoS handover decision. Then the RNCinitiate the QoS handover.

In the measurement phase

The RNC sends an inter-frequency measurement control message to the UE, requesting the NodeB and UE to start the compressedmode. The RNC also requests the UE to perform the inter-frequency or inter-RAT handover measurement.

If the CPICH of the current cell becomes better, the UE reports the event 2F. Then the RNC stops the compressed mode and thecoverage handover.

In this phase, the method of either periodical measurement report or event-triggered measurement report can be used.

In the decision phase

After the UE reports event 2B or 3A, the RNC performs the handover. Or the UE periodically generates measurement reports, and theRNC makes a decision after evaluation.

In the execution phase

The RNC executes the handover procedure.

5.2 Coverage or QoS Handover Measurement

In the measurement phase of inter-frequency or inter-RAT handover, the UE takes measurement according to the MEASUREMENTCONTROL message received from the RNC. When the measurement report conditions are met, the UE sends measurement reports to theRNC according to the rules defined in the MEASUREMENT CONTROL message.

For detailed information on the quality estimation, see section "Frequency Quality Estimate" in 3GPP TS 25.331.

5.2.1 Coverage or QoS Handover Measurement Report Modes

The coverage-based and QoS-based handover use event-triggered or periodical measurement report mode.

InterFreqReportMode: The measurement report mode of inter-frequency handover.

InterRatReportMode: The measurement report mode of inter-RAT handover.

PrdReportInterval: The periodical measurement report interval of inter-frequency handover.

InterRATPeriodReportInterval: The periodical measurement report interval of inter-RAT handover.

The advantage of periodical measurement report is that if the handover fails, the RNC reattempts the handover to the same cell afterreceiving the periodical measurement report from the UE. This increases the probability of the success of inter-frequency handover.

Based on the measurement control message received from the RNC, the UE periodically reports the measurement quality of the target cell.Then, based on the measurement report, the RNC makes the handover decision and performs handover.

5.2.2 Coverage or QoS Handover Measurement Quantity

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Measurement quantities vary according to the type of inter-frequency or inter-RAT handover.

The used frequency belongs to a UMTS cell and the used frequency measurement quantities are set as follows:

In inter-frequency or inter-RAT coverage or QoS handover, event 2B/2D/2F or periodical measurement takes both CPICH Ec/No andRSCP as measurement quantities.

In coverage-based inter-RAT handover, the system delivers both CPICH Ec/N0 and CPICH RSCP for 2D/2F measurement. Todeliberately limit the types of measurement quantity, you can set the corresponding threshold of the limited measurement quantity to theminimum value. For example, if event 2D of CS service Ec/No can be reported but the RSCP cannot, the parameterInterRATCSThd2DRSCP or InterFreqCSThd2DRSCP is set to the minimum value, that is, -115.

In inter-RAT coverage handover, the event 3A measurement quantity is set through the parameter MeasQuantityOf3A.

In inter-RAT QoS handover, the event 3A measurement quantity is set through the parameter UsedFreqMeasQuantityForQos3A.

The unused frequencies belong to a GSM cell, and the unused frequency measurement quantity is referred to as to GSM RSSI.

5.2.3 Coverage or QoS Handover Measurement Events

When the measurement thresholds are reached, the UE reports the events to the RNC to trigger related handover procedures.

Table 5-1 describes the measurement events involved in inter-frequency or inter-RAT handover.

Table 5-1 Measurement events involved in inter-frequency handover

Event Description

2D The estimated quality of the currently used frequency is below a certainthreshold.

2F The estimated quality of the currently used frequency is above a certainthreshold.

2B The estimated quality of the currently used frequency is below a certainthreshold and the estimated quality of a non-used frequency is above acertain threshold.

3A The estimated quality of the currently used UTRAN frequency is below acertain threshold and the estimated quality of the other system is above acertain threshold.

Triggering of Event 2D

After the conditions of event 2D are fulfilled and maintained until the TimeToTrig2D is reached, the UE sends the event 2D measurementreport message.

Event 2D is triggered on the basis of the following formula:

QUsed ≤ TUsed2d - H2d/2

QUsed is the measured quality of the used frequency.

TUsed2d is the absolute quality threshold of the cell that uses the current frequency. Based on the service type and measurementquantity, this threshold can be configured through one of the following parameters:

Inter-frequencyparameters

− InterFreqCSThd2DEcN0

− InterFreqR99PsThd2DEcN0

− InterFreqHThd2DEcN0

− InterFreqCSThd2DRSCP

− InterFreqR99PsThd2DRSCP

− InterFreqHThd2DRSCP

Inter-RAT parameter

− InterRATCSThd2DEcN0

− InterRATR99PsThd2DEcN0

− InterRATHThd2DEcN0

− InterRATCSThd2DRSCP

− InterRATR99PsThd2DRSCP

− InterRATHThd2DRSCP

The parameters related to HSPA handover are valid only when the switch HoSwitch: HO_ALGO_OVERLAY_SWITCH is set to ON.Otherwise, all the PS domain services will take the parameters related to R99 PS service as a measurement event threshold.

− For the PS and CS combined services, the threshold is set to the higher one of CS or PS services.

− If the UE has only signaling connections currently, the thresholds for CS services are used.

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H2d is the event 2D hysteresis value set through the parameter HystFor2D.

Triggering of Event 2F

After the conditions of event 2F are fulfilled and maintained until the parameter TimeToTrig2F is reached, the UE reports the event 2Fmeasurement report message.

Event 2F is triggered on the basis of the following formula:

QUsed ≥ TUsed2f + H2f/2

Where,

QUsed is the measured quality of the used frequency.

TUsed2f is the absolute quality threshold of the cell that uses the current frequency. Based on the service type and measurementquantity, this threshold can be configured through one of the following parameters:

Inter-frequency parameters

− InterFreqCSThd2FEcN0

− InterFreqCSThd2FRSCP

− InterFreqR99PsThd2FEcN0

− InterFreqR99PsThd2FRSCP

− InterFreqHThd2FEcN0

− InterFreqHThd2FRSCP

Inter-RAT parameters

− InterRATCSThd2FEcN0

− InterRATR99PsThd2FEcN0

− InterRATHThd2FEcN0

− InterRATCSThd2FRSCP

− InterRATR99PsThd2FRSCP

− InterRATHThd2FRSCP

The parameters related to HSPA handover are valid only when the switch HOSWITCH > HO_ALGO_OVERLAY_SWITCH is set to ON.Otherwise, all the PS domain services will take the parameters related to R99 PS service as a measurement event threshold.

− For the PS and CS combined services, the threshold is set to the higher one of CS or PS services.

− If the UE has only signaling connections currently, the thresholds for CS services are used.

H2f is the event 2F hysteresis value set through the parameter HystFor2F.

Triggering of Event 2B

After the conditions of event 2B are fulfilled and maintained until the parameter TimeToTrig2B is reached, the UE reports the event 2Bmeasurement report message.

Event 2B is triggered on the basis of the following formula:

QNoused ≥ TNoused2b + H2b/2

QUsed ≤ TUsed2b - H2b/2

Where,

QNoused is the measured quality of the cell that uses the other frequencies.

QUsed is the measured quality of the used frequency.

H2b is the event 2B hysteresis value set through the parameter HystFor2B.

TNoused2b is the absolute quality threshold of the cell that uses the other frequencies. Based on the service type and measurementquantity, this threshold can be configured through one of the following parameters:

− TargetFreqCsThdEcN0

− TargetFreqCsThdRscp

− TargetFreqR99PsThdEcN0

− TargetFreqR99PsThdRscp

− TargetFreqHThdEcN0

− TargetFreqHThdRscp

TUsed2b is the absolute quality threshold of the cell that uses the current frequency.

TUsed2b is set in the following way:

Based on the service type and measurement quantity, this threshold can be configured through one of the following parameters:

If event 2D with the CPICH RSCP value is received by the RNC:

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− TUsed2b of event 2B with the CPICH RSCP value can be:

UsedFreqCSThdRSCP

UsedFreqR99PsThdRSCP

UsedFreqHThdRSCP

− TUsed2b of event 2B with the CPICH Ec/No value is configured as the maximum value 0 dB.

According to 3GPP specifications, TUsed2b of event 2B with the CPICH Ec/No value should be configured as the maximum value 0 dB.If the event 2F with the CPICH Ec/No value is received by the RNC and TUsed2b of event 2B with the CPICH Ec/No value is modified,TUsed2b is reset to 0 dB.

If event 2D with the CPICH Ec/No value is received by the RNC:

− TUsed2b of event 2B with the CPICH Ec/No value can be:

UsedFreqCSThdEcN0

UsedFreqR99PsThdEcN0

UsedFreqHThdEcN0

− TUsed2b of event 2B with the CPICH RSCP value is configured as the maximum value –25 dBm.

According to 3GPP specification, TUsed2b of event 2B with the CPICH RSCP value should be configured as the maximum value –25dBm. If event 2F with the CPICH RSCP value is received by the RNC and TUsed2b of event 2B with the CPICH RSCP value is modified,TUsed2b is reset to –25 dBm.

The parameters related to HSPA handover are valid only when the switch HO_ALGO_OVERLAY_SWITCH is set to ON. Otherwise, all the PS domain services

will take the parameters related to R99 PS service as a measurement event threshold.

For the PS and CS combined services, the threshold is set to the higher one of CS or PS services.

If the UE has only signaling connections currently, the thresholds for CS services are used.

Triggering of Event 3A

When the conditions for event 3A are met and maintained in time-to-trigger specified by TrigTime3A the UE sends the measurementreport of event 3A.

Event 3A is triggered on the basis of the following formula:

QUsed ≤ TUsed - H3a/2 and MOtherRAT + CIOOtherRAT ≥ TOtherRAT + H3a/2

Where,

QUsed is the measurement value of the cell at the currently used frequency.

TUsed is the absolute quality threshold of the cell that uses the current frequency. Based on the service type and measurement quantity

in the coverage-based handover, TUsed can be configured through the following parameters

− UsedFreqCSThdEcN0

− UsedFreqCSThdRSCP

− UsedFreqHThdEcN0

− UsedFreqHThdRSCP

− UsedFreqR99PsThdEcN0

− UsedFreqR99PsThdRSCP

In the Coverage-based handover, based on the measurement quantity (CPICH Ec/No or RSCP), TUsed is configured as follows:

− If the measurement quantity is CPICH Ec/No:

If 2D is triggered by RSCP, TUsed is configured as the maximum value 0 dB.

If 2D is triggered by Ec/No, TUsed is configured as the Ec/No threshold specified by the previous parameters.

− If the measurement quantity is CPICH RSCP:

If 2D is triggered by RSCP, TUsed is configured as the RSCP threshold specified by the previous parameters..

If 2D is triggered by Ec/No, TUsed is configured as the maximum value -25 dBm.

In the uplink QoS-based handover, based on the measurement quantity (CPICH Ec/No or RSCP), TUsed is configured as the maximum

value according to 3GPP specifications, as described below:

− If the measurement quantity is CPICH Ec/No, TUsed is configured as the maximum value 0 dB.

− If the measurement quantity is CPICH RSCP, TUsed is configured as the maximum value –25 dBm.

In the downlink QoS-based handover:

− If the measurement quantity is CPICH Ec/No, TUsed is configured as the maximum value 0 dB.

− If the measurement quantity is CPICH RSCP, based on the service type, TUsed can be configured as one of the following sums:

− UsedFreqCSThdRSCP and DlRscpQosHyst

− UsedFreqR99PsThdRSCP and DlRscpQosHyst

− UsedFreqHThdRSCP and DlRscpQosHyst

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MOtherRAT is the measurement value of the cell (in another RAT) in the reporting range.

CIOOtherRAT is the cell individual offset value of the cell (in another RAT) in the reporting range that is equal to the sum of CIO andCIOOffset.

TOtherRAT is the absolute inter-RAT handover threshold. Based on different service types (CS, PS domain R99 service, or PS domainHSPA service), this threshold can be configured through the following parameters:

− TargetRatCsThd

− TargetRatR99PsThd

− TargetRatHThd

H3a is 3A hysteresis, the hysteresis value of event 3A.

For the PS and CS combined services, the threshold for CS service is used.

5.2.4 BSIC Verification Requirements for 2G Cells

During inter-RAT measurement, it is recommended that the UE report the 2G cell to the RNC after the Base Transceiver Station IdentityCode (BSIC) of the cell is verified. This greatly enhances the reliability of handover. The parameter BSICVerify is the control switch for theBSIC verification.

5.3 Coverage or QoS Handover Decision and Execution

5.3.1 Inter-Frequency Coverage or QoS Handover Decision and Execution

The coverage-based and QoS-based inter-frequency handovers are categorized into two types according to the following twomeasurement report modes: periodical measurement report mode and event-triggered measurement report mode. Each modecorresponds to a different decision and execution procedure.

HOCovPrio specifies the neighboring cell priority for coverage based inter-frequency handover.

Inter-Frequency Handover in Periodical Measurement Report Mode

After receiving the periodical measurement report of the inter-frequency cell, the RNC starts the following decision procedures:

1. Decide whether both the CPICH Ec/No value and CPICH RSCP value of the pilot signal of the target cell meet the requirement of inter-frequency handover.

The evaluation formula is listed below:

Mother_Freq + CIOother_Freq ≥ Tother_Freq + H/2

Where,

− Mother_Freq is the CPICH Ec/No or CPICH RSCP measurement value of the target cell reported by the UE. Both of the two measurement

values of the inter-frequency cell must satisfy the formula.

− CIOother_Freq is the cell individual offset value of the target cell. It is equal to the sum of CIO and CIOOffset.

− Tother_Freq is the decision threshold of inter-frequency hard handover. Based on the service type and measurement quantity, this

threshold can be configured through one of the following parameters:

TargetFreqCsThdEcN0

TargetFreqCsThdRscp

TargetFreqR99PsThdEcN0

TargetFreqR99PsThdRscp

TargetFreqHThdEcN0

TargetFreqHThdRscp

These thresholds are the same as the quality threshold of event 2B.

− H is the inter-frequency hard handover hysteresis value set through the parameter HystForPrdInterFreq.

2. Start the hard handover time-to-trigger timer, which is configured through the parameter TimeToTrigForPrdInterFreq.

3. If Mother_Freq + CIOother_Freq < Tother_Freq - H/2, stop the timer.

4. Select the cells in sequence, that is, from high quality cells to low quality ones, to initiate inter-frequency handover in the cells where thehard handover time-to-trigger timer expires.

Each cell in the measurement report shall be evaluated as mentioned previously. When the hard handover time-to-trigger timers of morethan one cell expire at the same time, the latest measurement report is used for selecting the best inter-frequency neighboring cell forhandover. For example, the cell with the highest CPICH RSCP in the latest measurement report is selected, as shown in Figure 5-2.

Figure 5-2 Selecting the cell with the highest CPICH RSCP

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Inter-Frequency Handover in Event-Triggered Measurement Report Mode

After receiving the event 2B measurement reports of CPICH RSCP and CPICH Ec/No of the inter-frequency cell, the RNC starts thefollowing procedure:

1. Add all the pilot cells that trigger event 2B to a cell set and arrange the cells according to the measurement quality of CPICH_Ec/No indescending order.

2. Select the cells in turn from the cell set to perform inter-frequency handover.

5.3.2 3G-to-2G Coverage and QoS Handover Decision and Execution

The coverage-based and QoS-based 3G-to-2G handover is categorized into two types according to the following two measurement reportmodes: periodical measurement report mode and event-triggered measurement report mode. Each mode corresponds to a differentdecision and execution procedure.

3G-to-2G Coverage and QoS Handover in Periodical Report Mode

After receiving the periodical measurement report of GSM cells, the RNC performs the following decision and execution procedures:

1. Decide whether the quality of 2G cells meets the conditions of inter-RAT handover.

The evaluation formula is listed below:

Mother_RAT + CIOother_RAT ≥ Tother_RAT + H/2

Where,

− Mother_RAT is the measurement result of inter-RAT handover received by the RNC.

− CIOother_RAT is the cell individual offset value of the target cell. It is equal to the sum of CIO and CIOOffset.

− Tother_RAT is the decision threshold of inter-RAT hard handover.

Based on the service type and measurement quantity, this threshold can be configured through the following parameters:

TargetRatCsThd

TargetRatR99PsThd

TargetRatHThd

− H is the inter-RAT handover hysteresis value set through HystforInterRAT.

− For the PS and CS combined services, one or more handover thresholds for CS services are used.

2. Start the evaluation of the cells that meet the quality requirement and start the time-to-trigger timer. If the measurement report meet thefollowing formula and time-to-trigger timer does not expire, stop the time-to-trigger timer.

Mother_RAT + CIOother_RAT < Tother_RAT - H/2

The length of the time-to-trigger timer is configured through the parameter TimeToTrigForVerify (with BSIC acknowledged) or theparameter TimeToTrigForNonVerify (with BSIC unacknowledged).

3. Select the cells in sequence, that is, from high quality cells to low quality ones, to initiate 3G-to-2G handover in the cells where thehandover time-to-trigger timer expires.

3G-to-2G Coverage and QoS Handover in Event Report Mode

After receiving the event 3A measurement report of 2G cells, the RNC performs the following decision and execution procedures:

1. Put all the 2G cells that trigger event 3A into a cell set and arrange the cells according to the measurement quality in descending order.

2. Select the cells in sequence from the cell set to perform inter-RAT handover.

5.4 Rules for 3G-to-2G Coverage or QoS Handover

The rules for enabling the 3G-to-2G handover are based on the Service Handover Indicator and the capability requirement. The rules varyaccording to the types of inter-RAT handover.

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Capability Requirement

Before deciding the 3G-to-2G handover, the RNC considers 2G cell capability, service capability and UE capability.

2G cell capability: 2G cell capability is configured through the parameter RatCellType. This parameter indicates whether the cell supportsthe GSM, GPRS, or EDGE.

Service required capability: The Required 2G Capability (Req2GCap) specifies the capability of 2G cells required by inter-RAT handover.This indicates whether the service is supported by the GSM, GPRS, or EDGE.

UE capability: Upon the reception of the UE capability information message, the RNC decides whether to start the inter-RATmeasurement. The information indicates whether the UE supports the GSM, GPRS, or EDGE.

The following tables describe the impacts of different types of capability on handover decision. If the capability of all 2G neighboring cellsdoes not meet the requirement, the inter-RAT measurement will not be triggered.

Table 5-2 Impacts of different types of capability on handover decision

2G CellCapability

UE Capability Service Required Capability

EDGE GPRS GSM

EDGE EDGE Allowed Allowed Allowed

GPRS Allowed Allowed Allowed

GSM Not allowed Not allowed Allowed

Not supported by2G

Not allowed Not allowed Not allowed

GPRS EDGE Allowed Allowed Allowed

GPRS Allowed Allowed Allowed

GSM Not allowed Not allowed Allowed

Not supported by2G

Not allowed Not allowed Not allowed

GSM EDGE Not allowed Not allowed Allowed

GPRS Not allowed Not allowed Allowed

GSM Not allowed Not allowed Allowed

Not supported by2G

Not allowed Not allowed Not allowed

Service Handover Indicator

The RNC initiates the coverage- or QoS-based UMTS-to-GSM handover only when Service Handover Indicator is as follows:

HO_TO_GSM_SHOULD_BE_PERFORM

HO_TO_GSM_SHOULD_NOT_BE_PERFORM

The IE Service Handover Indicator indicates the CN policy for the service handover to the 2G network. This IE is indicated in the RadioAccess Bearer (RAB) assignment signaling assigned by the CN, or provided by the RNC side.

The algorithm switch HoSwitch: HO_INTER_RAT_RNC_SERVICE_HO_SWITCH decides whether the service attribute of inter-RAThandover is based on the RNC or the CN.

If the switch is set to ON, the service attribute of inter-RAT handover is based on the parameter configured on the RNC side.

If the switch is set to OFF, the service attribute of inter-RAT handover is first based on the CN when the indicator is contained in the RABassignment signaling assigned by the CN. If the CN does not allocate a service indicator, the service attribute of inter-RAT handover isbased on the RNC side.

Through the SHIND parameter, the service handover indicators are set as follows:

HO_TO_GSM_SHOULD_BE_PERFORM: means that the handover to the 2G network is performed when 2G signals are available.

HO_TO_GSM_SHOULD_NOT_BE_PERFORM: means that the handover to the 2G network is performed when 3G signals are weak but2G signals are strong.

HO_TO_GSM_SHALL_NOT_BE_PERFORM: means that the handover to the 2G network is not performed even when 3G signals areweak but 2G signals are strong.

By default, the RNC does as follows:

For a UE with a single signaling RAB, the RNC supports the handover to the GSM. But it is not recommended.

For the UE accessing combined services (with CS services), the RNC sets the service handover indicator of the UE to that of the CSservice, because the CS service has the highest QoS priority.

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For the UE accessing combined services (with only PS services), the RNC sets the service handover indicator of the UE to that of the PSservice with the highest QoS priority

If the service handover indicators are not configured by the CN, each indictor can be set to the service parameter index of a service on theRNC. Each service parameter index is the index of one typical service RAB, which involves a set of service type, source description, CNdomain ID, and maximum rate (bit/s).

5.5 3G-to-2G NACC

This section describes the feature WRFD-02030801 NACC (Network Assisted Cell Change).

The Network Assisted Cell Change (NACC) function can efficiently reduce the delay of UMTS-to-GSM handover.

Some services have requirements for the delay. If the handover takes too long, TCP may start slowly or data transmission of the servicestream may be interrupted due to the overflow of the UE buffer. The introduction of NACC enables the system information exchangebetween different BSSs, or between BSS and RAN. The inter-system delay, especially inter-system delay in PS domains, can be reduced.With NACC, the RNC sends the UE a cell change order, which contains the GSM EDGE Radio Access Network (GERAN) systeminformation, when the 3G-to-2G handover in the PS domain is triggered.

To enable the NACC function, do as follows:

Run the SET UCORRMALGOSWITCH command to set HoSwitch: HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH to ON.

Run the ADD UEXT2GCELL / MOD UEXT2GCELL command to set SuppRIMFlag to TRUE.

5.6 3G-to-2G PS Handover

This section describes the feature WRFD-02030802 PS Handover between UMTS and GPRS

PS handover is similar to the inter-RAT handover in the CS domain.

If the HoSwitch: HO_INTER_RAT_PS_3G2G_RELOCATION_SWITCH is turned on, the PS handover from the 3G network to the 2Gnetwork is performed in the relocation process. When the switch is not on, the PS handover from the 3G network to the 2G network isperformed in the cell change order process.

To enable the PS HO function, do as follows:

Run the SET UCORRMALGOSWITCH command to set HoSwitch: HO_INTER_RAT_PS_3G2G_RELOCATION_SWITCH parameter toON.

Run the ADD UEXT2GCELL / MOD UEXT2GCELL command to set SuppPSHOFlag to TRUE.

5.7 2G-to-3G Handover

The 2G-to-3G handover is initiated by the 2G network, where the dual-mode (GSM and WCDMA) mobile terminals are required. Both theGSM MSC and the GSM BSS must support the GSM-to-UMTS handover.

6 Load Handover

Load handover is used to balance the load among inter-frequency or inter-RAT cells. Load handover falls into the following categories:

Inter-frequency LDR handover

Inter-RAT LDR handover

Inter-RAT service handover

6.1 Inter-Frequency LDR Handover

6.1.1 Inter-Frequency LDR Handover Procedure

The inter-frequency LDR handover (WRFD-020103 Inter Frequency Load Balance) suits co-sited cells covering the same area.

In the triggering phase

The Load Reshuffling (LDR) module detects that the current cell is in basic congestion and then initiates an inter-frequency handover.

In the decision phase

For Inter-frequency LDR blind handover, the RNC decides to trigger an inter-frequency blind handover if the corresponding conditionsare met. After the inter-frequency handover is triggered, the RNC chooses a decision algorithm according to whether the conditions ofdirect blind handover are met.

For inter-frequency LDR measure-based handover, the RNC requests the UE to perform the inter-frequency measurement. Based onthe measurement results, the RNC chooses a target cell to perform inter-frequency hard handover.

In the execution phase

The RNC performs the handover according to the decision result.

For details of LDR, see Load Control Feature Parameter Description.

6.1.2 Inter-Frequency LDR Handover Measurement

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The Inter-frequency LDR handover uses the periodical report mode.

In Inter-frequency LDR blind handover, CPICH RSCP of the used frequency is measured.

In inter-frequency LDR measure-based handover, both CPICH_RSCP and CPICH_Ec/No of the target frequency are measured.

6.1.3 Inter-Frequency LDR Handover Decision and Execution

The LDR algorithm may trigger an inter-frequency handover. The following describes the procedure for handover decision and execution.

The inter-frequency LDR handover can be performed based on blind handover or measurement that can be decided by the parameterInterFreqLDHOMethodSelection.

Inter-Frequency LDR Blind Handover Decision

1. The LDR algorithm learns that a cell is in basic congestion and provides target cells and the UE with low priority for handover.

2. The RNC determines to trigger an inter-frequency blind handover.

If the UE is not in soft handover state, the RNC directly performs Inter-frequency LDR blind handover.

If the UE is in soft handover state, the RNC operates based on the following conditions:

If the HoSwitch: HO_ALGO_LDR_ALLOW_SHO_SWITCH is set to ON,

The RNC determines whether the cell that triggers LDR is the best cell.

− If this cell is the best cell, the RNC initiates an intra-frequency measurement for Inter-frequency LDR blind handover. The intra-frequency measurement is used to estimate quality of the inter-frequency cell of the same coverage.

− If this cell is not the best cell, the RNC does not initiate a Inter-frequency LDR blind handover.

If the HoSwitch: HO_ALGO_LDR_ALLOW_SHO_SWITCH is set to OFF, the RNC does not initiate a Inter-frequency LDR blind handover.

Inter-Frequency LDR Blind Handover Execution

The inter-frequency cells with the same coverage area have the same CPICH RSCP values. By measuring the CPICH RSCP of the cell, thequality of the cells with the same coverage area can be determined, which increases the probability of successful blind handover.

1. The RNC initializes the timer of intra-frequency measurement for blind handover. The timer is specified by internal algorithm and neednot be configured.

2. The RNC initiates a periodical intra-frequency measurement.

The measurement report mode is set to periodical report.

− The reporting period is BlindHOIntrafreqMRInterval.

− The number of measurement reports is BlindHOIntrafreqMRAmount.

− The intra-frequency handover measurement quantity is CPICH RSCP.

− The list of measured cells contains only the cells that trigger LDR.

3. After receiving from the UE the intra-frequency measurement reports for conditional blind handover, the RNC checks whether thefollowing condition is met:

CPICH RSCP of the cell in the measurement report >= BlindHOQualityCondition

− If the condition is met, the RNC increments the counter of the number of intra-frequency measurement reports for blind handover by 1.

− If the condition is not met, the RNC does not perform a blind handover to the cell that triggers LDR and stops intra-frequencymeasurement for blind handover.

4. When the counter reaches the value of BlindHOIntrafreqMRAmount, the RNC initiates a blind handover to the target cell.

If the counter does not reach this value, the RNC waits for the next intra-frequency measurement report from the UE.

5. If the timer of intra-frequency measurement for blind handover expires, the RNC does not perform a blind handover to the target celland stops intra-frequency handover measurement for blind handover.

If the inter-frequency handover based on coverage or QoS is triggered, the RNC stops the intra-frequency measurement for conditionalblind handover.

Inter-Frequency LDR Measure-based Handover Decision and Execution

1. The LDR algorithm learns that a cell is in basic congestion and provides target cells and the UE with low priority for handover.

2. The RNC selects the target cell based on the measurement results. The report period is specified by the parameter PrdReportInterval.

The target cell must meet the following conditions:

− The CPICH RSCP value of the target cell is larger than TargetFreqThdRscp.

− The CPICH Ec/No value of the target cell is larger than TargetFreqThdEcN0

− The target cell is not in the basic congestion state.

The RNC performs an inter-frequency hard handover to the target cell directly.

6.2 Inter-RAT LDR Handover

6.2.1 Inter-RAT LDR Handover Procedure

When the load of the 3G network is heavy and all the RABs of the UE are supported by the 2G network, the Inter-RAT (3G-to-2G) LDR

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handover (WRFD-020306 Inter-RAT Handover Based on Load) is triggered.

Figure 6-1 Inter-RAT LDR handover procedure

In the triggering phase

When the load of the 3G cell that the UE accesses is higher than the related threshold, the Load Reshuffling (LDR) algorithm makes ahandover decision. For detailed information of the LDR, see Load Reshuffling in the Load Control Feature Parameter Description.

In the measurement phase

The RNC enables the compressed mode and starts the inter-RAT handover measurement.

In the decision phase

After the UE reports event 3C, the RNC makes a handover decision.

In the execution phase

The RNC initiates a handover procedure.

6.2.2 Inter-RAT LDR Handover Measurement

For Inter-RAT LDR handover, the measurement report is triggered only by event.

In inter-RAT LDR handover, event 3C takes only GSM RSSI as measurement quantity.

When the estimated quality of other system is higher than a certain threshold, the UE reports event 3C to the RNC.

When the conditions for event 3C are met and the delay requirement specified by the TrigTime3C parameter can be satisfied, the UEsends the measurement report of event 3C.

Event 3C is triggered on the basis of the following formula:

MOtherRAT + CIOOtherRAT ≥ TOtherRAT + H3c/2

Where,

MOtherRAT is the measurement value of the cell (in another RAT) in the reporting range.

CIOOtherRAT is the cell individual offset value of the cell (in another RAT) in the reporting range, which is equal to the sum of CIO andCIOOffset.

TOtherRAT is the absolute inter-RAT handover threshold. Based on different service types (CS, PS domain R99 service, or PS domainHSPA service), this threshold can be configured through the following parameters:

− TargetRatCsThd

− InterRATNCovHOPSThd

H3c is HYSTFOR3C, the hysteresis value of event 3C.

For the PS and CS combined services, the threshold (s) for CS services is (are) used.

6.2.3 Inter-RAT LDR Handover decision and Execution

After receiving the event 3C measurement report of 2G cells, the RNC performs the following handover decision and execution procedure:

1. Put all the 2G cells that trigger event 3C into a cell set and arrange the cells according to the measurement quality in descending order.

2. Select the cells in sequence from the cell set.

To avoid the impact of the UE (in long-term measurement of compressed mode) on the radio network, the parameterInterRATHOAttempts is set to restrict the maximum attempts of the 3G-to-2G LDR-based or service-based handover. The parameterindicates the handover attempts made to the same cell or different cells. If the number of attempts exceeds the parameter value, the RNCdoes not initiate the handover.

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6.3 Inter-RAT Service Handover

Inter-RAT service handover supports 3G-to-2G handover based on service attributes. When 3G and 2G networks coexist, this featureenables the 3G traffic to be directed to the 2G network.

This feature can balance the load between the two systems by transferring some kind of appropriate services to GSM/GPRS.

6.3.1 Switches for Inter-RAT Service Handover

To perform the service-based 3G-to-2G handover, the RNC must turn on the related switches for services in the CS and PS domains.

When a single CS service is initially set up by the UE, the RNC allows the 3G-to-2G service-based handover if CSServiceHOSwitch isset to ON.

When a single PS service is initially set up by the UE, the RNC allows the service-based 3G-to-2G handover if PSServiceHOSwitch is setto ON.

For the combined services, no service-based handover is triggered.

6.3.2 Inter-RAT Service Handover Procedure

Figure 6-2 Service-based 3G-to-2G handover procedure

Except for the triggering phase, the procedure of Inter-RAT service Handover is the same as that of the Inter-RAT LDR handover. Fordetails, see section 6.2.3 "Inter-RAT LDR Handover decision and Execution."

When a service is established, the RNC requests the handover to the GSM based on the service type and service handover indicatorassigned by the CN.

Figure 6-3 shows an example of rules for the indicator of the 3G-to-2G handover based on load and service.

Figure 6-3 Example of rules for indicator of 3G-to-2G handover based on load and service

6.4 Rules for Enabling Inter-RAT LDR or Service Handover

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The RNC initiates the 3G-to-2G load handover only when Service Handover Indicator (SHIND) is as follows:

HO_TO_GSM_SHOULD_BE_PERFORM

HO_TO_GSM_SHOULD_NOT_BE_PERFORM

The RNC initiates the service-based 3G-to-2G handover only when the Service Handover Indicator isHO_TO_GSM_SHOULD_BE_PERFORM.

Before deciding the 3G-to-2G handover, the RNC considers 2G cell capability (RatCellType), service required capability (Req2GCap) andUE capability.

The following table describes the impacts of different types of capability on handover decision.

Table 6-1 Impacts of different types of capability on handover decision

CellCapability

UE Capability Service Capability (Required by 2G)

EDGE GPRS GSM

EDGE EDGE Allowed Allowed Allowed

GPRS Not allowed Allowed Allowed

GSM Not allowed Not allowed Allowed

Not supported by 2G Not allowed Not allowed Not allowed

GPRS EDGE Not allowed Allowed Allowed

GPRS Not allowed Allowed Allowed

GSM Not allowed Not allowed Allowed

Not supported by 2G Not allowed Not allowed Not allowed

GSM EDGE Not allowed Not allowed Allowed

GPRS Not allowed Not allowed Allowed

GSM Not allowed Not allowed Allowed

Not supported by 2G Not allowed Not allowed Not allowed

If the capability of all neighboring 2G cells does not meet the requirement, the inter-RAT measurement will not be triggered.

6.5 Interchanging Inter-RAT Load Information

In Inter-RAT LDR handover or service handover, load information is interchanged between 2G and 3G networks to facilitate inter-RAThandover (WRFD-020310 3G/2G Common Load Management).

The load status between the source cell and the target cell can be acquired by interchanging load information between a 3G cell and a 2Gcell during the LDR handover and service handover. Whether to further conduct the handover can be determined to avoid the 2G celloverload and possible handovers to congested cells.

Interchanging Load information in 3G to 2G Handover

The procedure for load information interchanging between the 3G source cell and 2G target cell is described as follows:

1. When the RNC sends a RELOCATION REQUIRED message to the 3G CN,

If the switch SndLdInfo2GsmInd is set to ON, the RELOCATION REQUIRED message includes the Old BSS To New BSS Information IEthat includes the load information of the 3G source cell.

If the switch SndLdInfo2GsmInd is set to OFF, then the RELOCATION REQUIRED message does not include the Old BSS To New BSSInformation IE.

2. When the RNC receives the RELOCATION COMMAND message from the 2G CN,

If the switch NcovHoOn2GldInd is set to ON, the RNC obtains the load information of the 2G target cell by reading the Inter-SystemInformation Transparent Container IE, which is included in the RELOCATION COMMAND message.

− If the 2G load is lower than CSHOOut2GloadThd (for CS service), or if the 2G load is lower than PSHOOut2GloadThd (for PS service),the RNC continues the inter-RAT handover procedure; otherwise, the RNC returns the Relocation Cancel message to the CN to cancelthis inter-RAT handover and makes another handover attempt to the next candidate cell generated in the cell list based on inter-RATmeasurement.

− If the Inter-System Information Transparent Container IE, is not included in the RELOCATION COMMAND message, the load informationof the 2G target cell is not considered and this inter-RAT handover is continued.

If the switch NcovHoOn2GldInd is set to OFF, the RNC continues the inter-RAT handover procedure without considering the thresholds.

Interchange Load Information in 2G-to-3G Handover

In 2G-to-3G handover based on load or service, the RNC can make a decision about admission considering the load information of the 3Gtarget cell. This can avoid the worsening of the 3G system performance caused by 2G-to-3G handover based on load or service if the 3Gsystem load is high.

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The procedure is described as follows:

1. When the RNC sends a RELOCATION REQUEST ACKNOWLEDGE message to the 3G CN,

− If the switch SndLdInfo2GsmInd is set to ON, the RELOCATION REQUEST ACKNOWLEDGE message includes the New BSS To OldBSS Information IE, which includes the load information of the 3G target cell.

− If the switch SndLdInfo2GsmInd is set to OFF, the RELOCATION REQUEST ACKNOWLEDGE message does not include the New BSSTo Old BSS Information IE.

2. Depending on the network requirement, the 2G network decides whether to use the load information sent to the 3G network forjudgment.

3. When the RNC receives the RELOCATION REQUEST message from the 3G CN,

− If the 3G cell is not in the basic congestion state, the RNC continues the inter-RAT handover procedure.

− If the 3G cell is in the basic congestion state, the RNC returns RELOCATION FAILURE message to the CN to cancel the inter-RAThandover.

For the concept of "basic congestion", see the Load Control Feature Parameter Description.

7 HSPA Handover

7.1 HSDPA Handover

7.1.1 HSDPA Intra-Frequency Handover

This section describes the decision and execution of intra-frequency handover, and the handover between a cell that supports the F-DPCHand a cell that does not support the F-DPCH after the introduction of HSDPA.

Handling of Event 1A

After receiving an event 1A report, the RNC proceeds as follows:

If the number of cells in the active set does not reach the maximum value, the RNC adds the cell to the active set.

If the number of cells in the active set reaches the maximum value, the RNC does not add the radio link to the active set.

Handling of Event 1B

After receiving an event 1B report, the RNC determines whether to delete a cell.

If the cell to be deleted is not an HSDPA serving cell, the cell is directly removed.

If the cell to be deleted is an HSDPA serving cell, then:

− If the new best cell supports HSDPA, the new best cell is reconfigured to be an HSDPA serving cell. If the reconfiguration fails, theservice is reconfigured onto DPCH.

− If the new best cell does not support HSDPA, the service is reconfigured onto DPCH to ensure the continuity of the service.

Handling of Event 1C

After receiving an event 1C report, the RNC decides whether to change the worst cell.

If the cell to be replaced is not an HSDPA serving cell, the cell is directly removed.

If the cell to be replaced is an HSDPA serving cell, then:

− If the best cell supports HSDPA, the best cell is reconfigured to be an HSDPA serving cell. If the reconfiguration fails, the service isreconfigured onto DPCH.

− If the best cell does not support HSDPA, the service is reconfigured onto DPCH to ensure the continuity of the service.

Handling of Event 1D

After receiving an event 1D report, the RNC proceeds as follows:

If the downlink service is carried on the HSDPA, then:

− If the new best cell in the active set supports HSDPA and the HSPA hysteresis timer (HspaTimerLen) expires, the new best cell isreconfigured to be an HSDPA serving cell.

− If the new best cell in the active set does not support HSDPA, the downlink service is directed to the DCH through the reconfiguration.

Figure 7-1 shows an example of how to handle event 1D in this situation. Assume that the UE moves from HSDPA cell 1 to HSDPA cell2, that the two cells are intra-frequency neighboring cells, and that all the cells in the active set support HSDPA. The RNC updates theHSDPA serving cell according to the reported event and keeps the HSDPA serving cell consistent with the best cell.

Figure 7-1 Intra-frequency handover between HSDPA cells when the best cell changes

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If the downlink service is carried on the DCH, then:

The UE is handover to the target cell, and the service is carried on DCH. After handover, the RNC may retry to configure the service onHS-DSCH. For details, see 7.5 HSPA Retry.

In the execution procedure mentioned above, CMP_UU_SERV_CELL_CHG_WITH_ASU_SWITCH of the CmpSwitch parameter is used todetermine whether the update of the active set and the change of the serving cell are synchronized. This switch is applicable to only R6UEs.

If the switch is ON, the UE supports the synchronization of the update of the active set and the change of the serving cell.

If the switch is OFF, the UE reconfigures the change of the serving cell by allocating physical channels after updating the active set.

During the update of the HSDPA serving cell, set the NBMMachsResetAlgoSelSwitch parameter to determine whether to reset the UEMAC-hs.

7.1.2 HSDPA Inter-Frequency Handover

Inter-frequency handover can be triggered on the basis of coverage, load, and hierarchical cell structure (HCS).

The following describes the three possible scenarios in which an inter-frequency handover occurs.

Scenario 1: Inter-Frequency Handover from an HSDPA Cell to an R99 Cell

As shown in Figure 7-2, when the UE moves from cell 1 (an HSDPA cell) to cell 2 (an R99 cell), the inter-frequency handover conditions aremet and event 2B is triggered. The RNC makes a handover decision for HSDPA services according to the neighboring cell measurementreport, and reconfigures the service onto the DPCH of cell 2.

Figure 7-2 Inter-frequency handover from an HSDPA cell to an R99 cell

Scenario 2: Inter-Frequency Handover from an R99 Cell to an HSDPA Cell

As shown in Figure 7-3, when the UE moves from cell 2 (an R99 cell) to cell 1 (an HSDPA cell), the inter-frequency handover conditions aremet and event 2B is triggered. The RNC hands over the UE to the DPCH first, and then to the HS-PDSCH if the service can be carried onthe HS-PDSCH.

Figure 7-3 Inter-frequency handover from an R99 cell to an HSDPA cell

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Scenario 3: Inter-Frequency Handover Between HSDPA Cells

As shown in Figure 7-4, when the UE moves from cell 1 (an HSDPA cell) to cell 2 (an HSDPA cell) and the inter-frequency handoverconditions are met, the UE is handed over from cell 1 to cell 2. The target cell becomes the new serving HS-PDSCH cell.

If the serving or target cell is in load congestion when the UE performs a serving cell update for inter-frequency or inter-RAT handover, theservice is reconfigured from the HS-PDSCH to the DPCH.

The hard handovers of an HSDPA cell is the same as those of an R99 cell.

Figure 7-4 Inter-frequency handover between HSDPA cells

7.1.3 HSDPA Inter-RAT Handover

When the UE is handed over to a cell that supports the F-DPCH from another system and a UL or DL event 4A is reported, the RNCdecides whether to change the bearer mode of TRB and SRB.

If the TPC command is carried on the F-DPCH between the UE and the UTRAN, the SRB and the TRB are carried on the HS-DSCH. If a cellthat does not support the F-DPCH is added to the active set, all the F-DPCHs are deleted. In addition, new DPCHs between the UE and allthe cells in the active set are set up to carry the SRB and TPC commands.

7.2 HSUPA Handover

This section involves the feature "WRFD-01061204 HSUPA Mobility Management".

7.2.1 HSUPA Intra-Frequency Handover

This section describes the decision and execution procedure of intra-frequency handover, and the handover between E-DCHs of 10 msTTI and 2 ms TTI after the introduction of HSUPA.

Handling of Event 1A

After receiving the measurement report, the RNC proceeds as follows:

If the target cell supports HSUPA and the uplink service is carried on the E-DCH, then:

If the current number of cells in the E-DCH active set is smaller than the value of MaxEdchCellInActiveSet, the target cell is added toboth the DCH and E-DCH active sets.

Otherwise, the target cell is added to only the DCH active set.

After deciding that a cell can be added to the E-DCH active set,

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If the admission in the downlink fails, the cell is added to neither the E-DCH active set nor the DCH active set. It waits for the next event1A report for retry.

Otherwise, if the admission in the downlink succeeds, the RNC perform the HSUPA admission in the uplink.

− If HSUPA admission in the uplink succeeds, the cell is added to the E-DCH active set and the DCH active set.

− If HSUPA admission in the uplink fails, the cell is added only to the DCH active set. If the DCH admission in the uplink still fails, the cell isadded to neither the E-DCH active set nor the DCH active set. It waits for the next event 1A report for retry.

Handling of Event 1B

If the number of radio links in the DCH active set is larger than one, then:

If the cell to be removed is not an HSUPA serving cell, the cell is directly removed.

If the cell to be removed is an HSUPA serving cell, then:

− If the new best cell supports HSUPA, the new best cell is reconfigured to be an E-DCH serving cell.

− If the new best cell does not support HSUPA, the uplink service is redirected to the DCH through the RB reconfiguration.

If the current service is CS Voice over HSPA and the cell to be removed is an E-DCH serving cell, then:

− If the new best cell supports both HSDPA and HSUPA, the cell is reconfigured to be an HS-DSCH serving cell or an E-DCH serving cell.

− If the new best cell supports HSDPA but not HSUPA, the current service is changed from CS Voice over HSPA to CS Voice over DCH. Ifthere remain other HSDPA services, the serving cell should be updated and the new best cell should be the HS-PDSCH serving cell.

− If the new best cell supports neither HSUPA nor HSDPA, the current service is reconfigured to be CS Voice over DCH.

Whether the cells under the adjacent RNC support CS Voice over HSPA is determined by the RNC-level parameterCSVoiceoverHSPASuppInd.

After the best cell of a UE changes, if the size of the DCH or E-DCH active set of the new best cell is different from those of the old bestcell, the RNC removes or reconfigures radio links to adapt to the size and configuration of the new best cell.

Handling of Event 1C

When event 1C is triggered, the UE reports the event-triggered list that contains good cells and the cells to be replaced, and sequencesthe cells from the highest to the lowest quality according to measurement quantity.

After receiving the measurement report, the RNC proceeds as follows:

If the new cell supports HSUPA, then:

− If the current number of cells in the E-DCH active set is smaller than the value of MaxEdchCellInActiveSet, the new cell is added to theE-DCH active set.

− If the current number of cells in the E-DCH active set is equal to the value of MaxEdchCellInActiveSet and the cell to be replaced isalso included in the E-DCH active set, the new cell joins the E-DCH active set through replacement.

− If the current number of cells in the E-DCH active set is equal to the value of MaxEdchCellInActiveSet and the cell to be replaced isnot included in the E-DCH active set, the new cell is added only to the DCH active set.

If the current service is CS Voice over HSPA and the cell to be removed is an E-DCH serving cell, then:

− If the new best cell supports both HSDPA and HSUPA, the cell is reconfigured to be an HS-DSCH serving cell or an E-DCH serving cell.

− If the new best cell supports HSDPA but not HSUPA, the current service is changed from CS Voice over HSPA to CS Voice over DCHthrough the reconfiguration. If there remain other HSDPA services, the serving cell should be updated and the new best cell should bethe HS-PDSCH serving cell.

− If the new best cell supports neither HSUPA nor HSDPA, the current service is reconfigured to be CS Voice over DCH. If the cell to beremoved is an E-DCH serving cell, the HS-DSCH serving cell must be removed at the same time. Therefore, a new E-DCH serving cellor HS-DSCH serving cell must be determined. The method is the same as that of removing the serving cell, as described in the previoussection of Handling of Event 1B.

If the new cell does not support HSUPA, the cell is added to only the DCH active set.

Handling of Event 1D

If the criteria for intra-frequency hard handover are fulfilled, the RNC performs intra-frequency hard handover after receiving the event 1Dreport. If the criteria for intra-frequency hard handover are not fulfilled, the RNC performs intra-frequency soft handover based on themeasurement report.

If the uplink service is carried on the E-DCH, then:

If the new best cell in the active set supports HSUPA and the HSPA hysteresis timer (HspaTimerLen) expires, the E-DCH serving cellbecomes the best cell. The HSPA hysteresis timer is restarted after the cell change.

If the new best cell in the active set does not support HSUPA,

− The uplink service is directed to the DCH through the reconfiguration. If the reconfiguration fails, the service is still carried on the E-DCH. The UE is connected to the new best cell only on the DCH.

If the uplink service is carried on the DCH, then:

The uplink service is still carried on the DCH. After handover, the RNC may retry to configure the service on E-DCH. For details, see 7.5HSPA Retry

If the current service is CS Voice over HSPA, then:

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If the new best cell supports both HSUPA and HSDPA, the cell is reconfigured to be an HSPA serving cell.

Otherwise, the service is changed from CS Voice over HSPA to CS Voice over DCH through the reconfiguration.

Triggering of Event 1J

Event 1J is triggered under the following condition:

10 x Log (MNew) + CIONew ³ 10 x Log (MInAS) + CIOInAS + H1j/2

MNew is the measurement result of the cell not in the E-DCH active set but in the DCH active set.

CIONew and CIOInAS refer to the offset of each cell.

MInAS is the measurement result of the cell in the E-DCH active set with the lowest measurement result.

H1J is the hysteresis parameter for event 1J and is determined by Hystfor1J.

If the measurement result is CPICH-Ec/No, MNew and MInAS are expressed as ratios.

If the measurement result is CPICH-RSCP, MNew and MInAS are expressed in mW.

Figure 7-5 Triggering of event 1J

A: signal quality curve of a cell in the E-DCH active set

B: signal quality curve of the worst cell in the E-DCH active set

C: signal quality curve of a cell not in the E-DCH active set but included in DCH active set

D: signal quality curve of a cell not in the E-DCH active set but included in DCH active set

In Figure 7-5, the hysteresis and the cell individual offsets for all cells equal 0.

The first measurement report is sent when primary CPICH D becomes better than primary CPICH B. The "cell measurement event result" ofthe measurement report contains the information of primary CPICH D and CPICH B.

On the assumption that the E-DCH active set has been updated after the first measurement report (E-DCH active set is now primary CPICHA and primary CPICH D), the second report is sent when primary CPICH C becomes better than primary CPICH A. The "cell measurementevent result" of the second measurement report shows that primary CPICH C is better than primary CPICH A in quality.

The following parameters need to be set on the RNC LMT:

Hystfor1J: hysteresis of event 1J

TrigTime1J: time to trigger event 1J

PeriodMRReportNumfor1J: number of periodic reports for event 1J

ReportIntervalfor1J: report interval for event 1J after change to the periodic report

HoSwitch: HO_INTRA_FREQ_RPRT_1J_SWITCH: measurement control switch for event 1J. When the switch is ON, the UE version isR6 and event 1J is included in the intra-frequency measurement control message.

After receiving the intra-frequency measurement report from the UE, the RNC decides whether to go to the execution phase, depending onthe information in the report.

Handling of Event 1J

Event 1J provides the solution to the issue of how to add an HSUPA cell in a DCH active set to an E-DCH active set. This event is triggeredwhen a non-active E-DCH but active DCH primary CPICH becomes better than an active E-DCH primary CPICH.

When event 1J is triggered, the UE reports the event-triggered list that contains good cells and the cells to be replaced, and sequencesthe cells from the highest to the lowest quality according to measurement quantity.

After receiving the measurement report, the RNC proceeds as follows:

If the current number of cells in the E-DCH active set is smaller than the value of MaxEdchCellInActiveSet, the cell where event 1J istriggered is reconfigured to E-DCH.

If the current number of cells in the E-DCH active set is equal to the value of MaxEdchCellInActiveSet, the RNC searches the

measurement report for the non-serving Cell_EDCH with the lowest measured quality in the E-DCH active set. Then, the uplink of the cell

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measurement report for the non-serving Cell_EDCH with the lowest measured quality in the E-DCH active set. Then, the uplink of the cellwhere event 1J is triggered is reconfigured from DCH to E-DCH, and the uplink of CELL-EDCH is reconfigured from E-DCH to DCH.

Handover Between E-DCHs of 10 ms TTI and 2 ms TTI

For HSUPA, 2 ms TTI and 10 ms TTI are applicable but not all the cells support 2 ms TTI. When both 2ms-TTI-capable and 2ms-TTI-incapable cells exist in a network, a UE may undergo handovers between E-DCHs of 10 ms TTI and 2 ms TTI (WRFD-01061404 HSUPA2ms/10ms TTI Handover)..

Only when all the cells in the E-DCH active set support 2 ms TTI can the services be configured to the E-DCH with 2 ms TTI. If any cell inthe E-DCH active set does not support 2 ms TTI, the services are configured on the E-DCH with 10 ms TTI.

The detailed principles are as follows:

When the uplink service is carried on the E-DCH with 2 ms TTI, if a cell that supports only 10 ms TTI is to be added to the E-DCH activeset, the source cell undergoes a radio bearer reconfiguration to 10 ms TTI. A soft handover to the target cell is performed.

Upon each handover, if a radio link needs to be added, removed, or replaced, the RNC judges whether all the cells in the E-DCH activeset and the UE support 2 ms TTI.

If they all support 2 ms TTI and the uplink service is currently carried on the E-DCH with 10 ms TTI, the RNC reconfigures the service tothe E-DCH with 2 ms TTI.

− If the reconfiguration fails, a timer is started for periodic retries to the E-DCH with 2 ms TTI.

− If the handover is performed before the timer expires, the timer is stopped.

− After the handover, the RNC decides whether to start the timer, based on the handover result.

7.2.2 HSUPA Inter-Frequency Handover

Inter-frequency handover can be triggered on the basis of coverage, load, and hierarchical cell structure (HCS). The introduction ofHSUPA does not affect the triggering conditions and decisions of these types of inter-frequency handover.

During the execution phase, whether to reconfigure the services from E-DCH to DCH depends on the HSUPA capability of the target cell.After the handover, a decision must be made about whether to reconfigure the services from DCH to E-DCH.

Table 7-1 describes the three possible scenarios for inter-frequency handover.

Table 7-1 Scenarios for inter-frequency handover

Scenario Description

Scenario 1Inter-frequency handover from an HSUPA cell to another HSUPA cell

The UE moves from one HSUPA cell to another HSUPA cell.

Event 2B is triggered.

Scenario 2Inter-frequency handover from an HSUPA cell to a non-HSUPA cell

The UE moves from an HSUPA cell to a non-HSUPA cell.

Event 2B is triggered.

Scenario 3Inter-frequency handover from a non-HSUPA cell to an HSUPA cell

The UE moves from a non-HSUPA cell to an HSUPA cell.

Event 2B is triggered.

If the current service is CS Voice over HSPA and the target cell supports both HSDPA and HSUPA, the target cell is reconfigured as anHSPA serving cell. Otherwise, the service of CS Voice over HSPA must first be reconfigured as CS Voice over DCH.

Whether the target RNC supports CS Voice over HSPA is determined by the parameter CSVoiceOverHspaSuppInd.

Scenario 1: Inter-Frequency Handover from an HSUPA Cell to Another HSUPA Cell

Assume that the UE moves from HSUPA cell 1 to HSUPA cell 2 and that the two cells are inter-frequency neighboring cells, as shown inFigure 7-6.

Figure 7-6 Inter-frequency handover from an HSUPA cell to another HSUPA cell

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During this procedure, event 2B is triggered. The HSUPA admission request is made for the target cell by the RNC.

If the request is accepted, the handover is performed through the physical channel reconfiguration message.

If the request is rejected, the RB reconfiguration is implemented, and the services on the E-DCH are reconfigured for the DCH.

Scenario 2: Inter-Frequency Handover from an HSUPA Cell to a Non-HSUPA Cell

Assume that the UE moves from HSUPA cell 1 to non-HSUPA cell 2 and that the two cells are inter-frequency neighboring cells, as shown inFigure 7-7.

Figure 7-7 Inter-frequency handover from an HSUPA cell to a non-HSUPA cell

During this procedure, event 2B is triggered, and the target cell does not support HSUPA. The DCH admission request is made for thetarget cell. After the request is accepted, the RB reconfiguration is implemented, and the services on the E-DCH are reconfigured for theDCH.

Scenario 3: Inter-Frequency Handover from a Non-HSUPA Cell to an HSUPA Cell

Assume that the UE moves from non-HSUPA cell 1 to HSUPA cell 2 and that the two cells are inter-frequency neighboring cells, as shown inFigure 7-8.

Figure 7-8 Inter-frequency handover from a non-HSUPA cell to an HSUPA cell

During this procedure, event 2B is triggered. The inter-frequency handover on DCH is performed, and the HSUPA admission request ismade for the target cell by the RNC.

After the request is accepted, the RB reconfiguration is implemented, and the services on the DCH are reconfigured for the E-DCH.

7.2.3 HSUPA Inter-RAT Handover

If the current service is CS voice service and the UE is handed over from a 2G cell to a 3G cell,

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If the UE supports CS Voice Over HSPA and the target 3G RAN supports CS Voice Over HSPA, the service is configured as CS Voiceover HSPA when the UE is handed over to the 3G system.

Otherwise, the service is configured as CS Voice Over DCH when the UE is handed over to the 3G system.

7.3 HSPA+ Handover

7.3.1 Overview

The basic mechanisms of handover remain unchanged after the introduction of HSPA+. New functions are added to handle the scenariowhere the source cell and target cell support different HSPA+ technologies or where admission control prevents the UE from using thepreferred technologies.

Whether a neighboring cell supports HSPA+ technologies can be set through the parameter CellCapContainerFdd.

Figure 7-9 shows the procedure of HSPA+ technology configuration.

Figure 7-9 Procedure of HSPA+ technology configuration

The procedure of HSPA+ technology configuration is as follows:

1. In the preselection phase (during handover decision)

The RNC preselects HSPA+ technologies based on the technologies provided for the UE in the source cell and the capability of thetarget cell.

2. In the fallback phase (during handover execution)

The RNC attempts to apply the preselected technologies to the UE in the target cell. If the RNC fails to do so, it attempts to apply DCH tothe UE.

3. In the retry phase (after handover)

After the handover, the RNC attempts to apply the preselected technologies that failed to be applied to the UE in the target cell.

7.3.2 Preselection Phase

HSPA+ technologies are preselected in the preselection phase (during handover decision).

For DC-MIMO, DC-HSDPA, MIMO+64QAM, MIMO, 64QAM, downlink enhanced L2, and HS-SCCH Less Operation, the preselectionschemes are as follows:

If the target cell supports the same technologies as the source cell and the bearer scheme allows the target cell to continue using them,the RNC preselects these technologies for the target cell.

Otherwise, the RNC preselects the technologies supported by the target cell and used by the UE in the source cell.

For uplink 16QAM, uplink enhanced L2 and DTX/DRX, the preselection schemes are as follows:

During an intra-frequency soft handover, the RNC preselects HSPA+ technologies if both of the following conditions are met:

− All the cells in the active set support the technologies.

− The target cell supports the technologies.

Otherwise, the RNC does not preselect them.

During an intra- or inter-frequency hard handover, the RNC preselects the technologies supported by the target cell and used by the UEin the source cell. For example, if the UE uses MIMO and downlink enhanced L2 in the source cell and the target cell supports onlydownlink enhanced L2, the RNC preselects only downlink enhanced L2 for the UE.

7.3.3 Fallback Phase

HSPA+ technologies with lower ranking are selected in the fallback phase (during handover execution).

In this phase, the RNC performs admission control based on the preselected technologies.

If the admission is unsuccessful, the RNC selects DCH to carry services.

7.3.4 Retry Phase

In the retry phase, if both the UE and the network meet the requirements for configuring higher-ranked technologies, the RNC attempts toapply them, which may not be pre-selected in the preselection phase or fails to be applied in the fallback phase. For example, the RNCattempts to use DC-HSDPA instead of SC-HSDPA.

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The retry procedure is as follows:

1. The RNC starts the handover protection timer (ChannelRetryHoTimerLen).

2. After the timer expires, the RNC attempts to apply higher-ranked technologies.

3. If the retry fails, the RNC starts the retry timer (ChannelRetryTimerLen) for periodic retry attempts.

The HSPA+ technologies that can be retried are specified by the parameter RetryCapability.

7.4 Anti-Frequent Serving Cell Change

HSPA serving cell change is usually triggered by event 1D. To avoid frequent serving cell change that may affect the system performance,a protection timer HspaTimerLen is introduced. This timer shall be started when the serving HS-DSCH cell changes or the E-DCH servingcell changes. In addition, no more 1D-triggered serving cell change shall be performed until the timer expires. However, this timer shall notrestrict HSPA serving cell change to another cell in the active set if current serving cell is to be removed from the active set. The value 0means this timer shall not be started and serving cell change be initiated immediately.

7.5 HSPA Retry

If a UE has a HSDPA/HSUPA suitable service, the RNC tries to reconfigure the service onto the HS-DSCH/E-DCH as soon as possible.

After handover or radio bearer setup, the HSPA suitable service may be set up on the DCH or FACH in a cell. If the cell is capable of HSPAor the cell has a HSPA capable neighboring cell, the RNC retries to configure the service on the HS-DSCH/E-DCH in this cell or in itsneighboring cell.

To avoid frequent handovers at the boundary between an HSPA cell and an R99 cell, a protection timer (ChannelRetryHoTimerLen) isused. After a handover, the timer starts. After this timer expires, the RNC retries to configure the service of the UE onto the HS-DSCH or E-DCH if either of the following two conditions is met:

The target cell supports HSDPA or HSUPA.

The target cell does not support HSDPA or HSUPA but has a DRD neighboring cell.

If the admission fails during the reconfiguration, the timer (ChannelRetryTimerLen) is started. Periodic retries to HS-DSCH or E-DCH areperformed.

8 HCS Handover

8.1 Overview

HCS handover (WRFD-021200 HCS) is one type of inter-frequency handover and inter-RAT handover. HCS handover is based on UEspeed estimation, and is also called speed-based handover.

In a 3G network, hot spots in radio communication may appear with the increase of subscribers and traffic. This requires more cells toincrease the network capacity. More cells and smaller cell radius lead to more frequent handovers of UEs. For a UE in fast movement,frequent handovers reduce call quality, increase uplink interference, and increase signaling load. Here, Hierarchical Cell Structure (HCS) isa mechanism that arranges different cells at different layers. HCS handover instructs UEs to stay at different layers based on speedestimation, increasing the network capacity.

Figure 8-1 shows an HCS example with three layers.

Figure 8-1 HCS with three layers

The features of different cells are as follows:

Macro cell

− Large coverage

− Continuous coverage

− Low requirement for capacity

− Fast-moving environment

Micro cell

− Densely populated areas

− High requirement for capacity

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− Slow-moving environment

Pico cell

− Indoor coverage

− Outdoor blind spot coverage

− Slow-moving environment

The pico cell has the highest priority and the macro cell has the lowest priority.

Based on speed estimation, the RNC instructs a fast-moving UE to select a cell with a lower priority to decrease the frequency ofhandovers, and instructs a slow-moving UE to select a cell with a higher priority to increase the network capacity. The cell with a lowerpriority has larger coverage, and the cell with a higher priority has smaller coverage.

RNC supports the HCS with eight layers. The priority level of a cell is set by the HCSPrio parameter.

To allow HCS handover, the RNC must enable the function through the HoSwitch: HO_ALGO_HCS_SPEED_EST_SWITCH parameter.

8.2 HCS Handover Procedure

HCS handover is based UE speed estimation. Figure 8-2 shows HCS handover procedure.

Figure 8-2 HCS handover procedure

In the triggering phase

The RNC receives the handover request from the HCS speed estimation function. The HCS handover is of two types: handover from themacro cell to the micro cell and handover from the micro cell to the macro cell. For different types of handover, the RNC acts differently.

In the measurement and decision phases

− If the handover is performed from a macro cell to a micro cell, the RNC sends an inter-frequency measurement control message. Afterthe UE reports event 2C for inter-frequency handover or 3C for inter-RAT handover, the RNC performs the handover decision.

− If the handover is performed from a micro cell to a macro cell, the RNC directly performs blind handover, ignoring the measurementprocedure.

In the execution phase

The RNC initiates a handover procedure.

− If the handover is performed from a micro cell to a macro cell and the target cell allows blind handover (configured through theparameter BlindHOFlag), the RNC performs blind handover to the target cell. If the blind handover fails, the RNC starts the inter-frequency (or inter-RAT) measurement procedure and performs the handover procedure to the cell with the best quality after receivingevent 2C or 3C from the UE.

− If the handover is performed from a macro cell to a micro cell, the RNC starts the inter-frequency (or inter-RAT) measurementprocedure and performs the handover procedure to the cell with the best quality after receiving event 2C or 3C from the UE.

8.3 UE Speed Estimation

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This section describes high-speed estimation, low-speed estimation, and anti-ping-pong event 1D recording.

Based on the number of changes of the best cell within a specified period, the speed estimation algorithm estimates the moving speed ofthe UE. Then, the RNC decides the UE speed.

The procedure for high-speed estimation is as follows:

If HoSwitch: HO_ALGO_HCS_SPEED_EST_SWITCH is set to ON and the cell is layered with a not lowest priority, the RNC initiates ahigh-speed estimation for the UE after receiving an event 1D report.

If the number of changes of the best cell for the UE is higher than the NFastSpdEst within the TFastSpdEst, the RNC decides that the UEis in fast movement.

The procedure for low-speed estimation is as follows:

If the HoSwitch: HO_ALGO_HCS_SPEED_EST_SWITCH is set to ON and the cell is layered with a not highest priority, the RNC startsthe timer TCycleSlow after the RRC connection is set up.

When the timer TCycleSlow expires, the RNC initiates a low-speed estimation for the UE.

If the number of changes of the best cell for the UE is lower than the NSlowSpdEst within the TSlowSpdEst, the RNC decides that the UEis in slow movement.

If frequent changes of the best cell occur, several events 1D for the same cell may be recorded. This may lead to inaccurate UE speedestimation. Therefore, a mechanism is used for anti-ping-pong event 1D recording.

During the recent period specified by TRelateLength, if multiple event 1Ds are reported for a certain cell, only the first one is recorded.

8.4 HCS Handover Measurement

In the case of handover from high layer to the low layer (from micro cell to macro cell), the UE does not perform measurement. The RNCdecides the blind handover for the UE.

For the handover from low layer to the high layer (from macro cell to micro cell), the HCS handover uses the measurement and the UEuses event-triggered report mode.

In inter-frequency HCS handover, event 2C takes only CPICH Ec/No as measurement quantity.

In inter-RAT HCS handover, event 3C takes only GSM RSSI as measurement quantity.

Triggering of Event 2C

When the estimated quality of a non-used frequency is above a certain threshold, the UE report event 2C to the RNC.

After the conditions of event 2C are fulfilled and maintained until the parameter TrigTime2C is reached, the UE reports the event 2Cmeasurement report message.

Event 2C is triggered on the basis of the following formula:

QNoused ≥ TNoused2c + H2c/2

Where,

QNoused is the measured quality of the cell that uses the other frequencies.

TNoused2c is the absolute quality threshold of the cell that uses the other frequencies, namely, InterFreqNCovHOThdEcN0.

H2c is the event 2C hysteresis value Hystfor2C.

8.5 HCS Handover Execution

HCS handover execution based on UE speed estimation falls into two categories: inter-layer handover in fast movement and inter-layerhandover in slow movement.

The inter-layer handover algorithm initiates the corresponding handover based on speed estimation:

If the UE is in fast movement, the RNC instructs the UE to select a cell with a lower priority.

If the UE is in slow movement, the RNC instructs the UE to select a cell with a higher priority.

If the UE is in normal movement, no inter-layer handover occurs.

When the RNC instructs the UE to select a cell with a lower or higher priority, the neighboring cells whose frequency band is not supportedby the UE are not taken into account. If there are neighboring cells with several candidate frequencies, the RNC selects one of thefrequencies randomly.

Inter-Layer Handover in Fast Movement

When deciding that the UE is in fast movement, the RNC instructs the UE to select a cell with a lower priority (handover from micro cell tomacro cell).

If the UE is located in the overlap between the cell with a higher priority and the cell with a lower priority, a blind handover is initiated.

1. The RNC selects the neighboring cells with a lower HCS priority level to generate a cell list. The neighboring cells whose frequency bandis not supported by the UE are not taken into account. If there are neighboring cells with several candidate frequencies, the RNCselects one of the frequencies randomly.

2. The RNC searches for neighboring cells for blind handover according to BlindHOFlag from the cell list generated in step 1.

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3. The RNC chooses a neighboring cell whose BlindHOQualityCondition value is the smallest for blind handover.

The RNC determines whether the target cell supports the current service. If the target cell does not support the current service, the RNCdoes not perform the blind handover.

The target cell can be a UMTS cell or a GSM cell. The priority of an intra-RAT inter-frequency blind handover is higher than that of aninter-RAT blind handover.

If the neighboring cell for blind handover is not configured or the blind handover fails, a measurement is initiated for cells with a lowerpriority.

The target cell is decided on the basis of the measurement report from the UE.

Inter-Layer Handover in Slow Movement

When deciding that the UE is in slow movement, the RNC instructs the UE to select a cell with a higher priority (handover from macro cell tomicro cell).

The inter-layer handover algorithm initiates a measurement for cells with a higher priority and then decides the target cell based on themeasurement report from the UE.

8.6 Signaling Procedure of HCS Handover

The signaling procedure for HCS handover is the same as that for inter-frequency handover and inter-RAT handover.

8.7 Interoperability Between HCS Handover and Other Handovers

This section describes the following aspects:

Interoperability between HCS handover and intra-frequency handover

Interoperability between HCS handover and inter-frequency handover

Interoperability between HCS handover and inter-RAT handover

Interoperability Between HCS Handover and Intra-Frequency Handover

If an intra-frequency handover is requested when an HCS handover measurement is initiated and an intra-frequency cell measurement isongoing, the HCS handover measurement is not disrupted.

After the intra-frequency handover is finished,

If the best cell remains unchanged, the HCS measurement continues.

If the best cell changes, the high-speed estimation for the UE is triggered.

Interoperability Between HCS Handover and Inter-Frequency Handover

An inter-frequency handover is triggered by one of the following factors:

Reporting of event 2D

QoS problem caused by the quality imbalance between uplink and downlink

Imbalance of load between inter-frequency cells

UE speed decision in HCS

Reporting of event 2D indicates that the inter-frequency handover based on coverage is triggered, which is of high priority to beprocessed.

If the HCS handover algorithm is performing inter-frequency measurement when event 2D is reported, the measurement control ismodified according to the algorithm of inter-frequency handover based on coverage.

If the RNC is performing inter-frequency measurement after event 2D is reported, HCS handover will not be executed.

If the measurement due to other causes stops, then HCS handover measurement is restarted. Other causes may be reception of event2F, expiration of measurement control, or others.

When a speed-based inter-frequency handover is triggered, the RNC determines first whether the timer specified byIFAntiPingpangTimerLength expires.

If the timer does not expire, the RNC cancels this handover.

If the timer expires, the RNC performs the handover.

Interoperability Between HCS Handover and Inter-RAT Handover

It is strongly recommended that the inter-RAT handover to 2G not be used in HCS handover.

Set the UseOfHcs parameter to NOT_USED to disable HCS priority setting for neighboring GSM cells.

9 Blind Handover

Overview

There are two types of blind handover: emergent blind handover and non-emergent blind handover.

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Emergent blind handover is triggered by 1F event that indicates the used frequency becomes worse. The UE must perform emergenthandover to avoid call drops.

Non-emergent blind handover may be triggered by LDR, DRD, or HCS speed estimation.

For details about LDR and DRD, see Load Control Feature Parameter Description.

For details about HCS speed estimation, see chapter 8 "HCS Handover."

The parameter BlindHoFlag is configured for neighboring cells and determines whether a blind handover to this cell is allowed.

The parameter BlindHOPrio indicates the blind handover priority of the cell. The value 0 represents the highest priority.

Triggering of Event 1F

After the conditions of event 1F are fulfilled and maintained until the parameter TrigTime1F is reached, the UE reports the event 1Fmeasurement report message.

Event 1F is triggered on the basis of the following formula:

10LogMOld ≤ T1f - H1f/2

Where,

MOld is the measurement value of the cell that becomes worse.

T1f is an absolute threshold. It is set through the parameter IntraAblThdFor1FRSCP or IntraAblThdFor1FecNo.

H1f is the event 1F hysteresis value set through the parameter Hystfor1F.

Blind Handover Based on Event 1F

When there is only one cell in the active set, the RNC performs inter-frequency blind handover after receiving event 1F.

1. The RNC gets the actual best cell from event 1F. If the quality of the best cell meets the blind handover condition, that is the quality ofthe best cell is larger than or equal to BlindHORSCP1FThreshold, the RNC gets neighboring cells for blind handover of the best cell,and filtrates the cells that belong to the frequency bands that UEs do not support. If the quality of the best cell is lower thanBlindHORSCP1FThreshold, the UE is at the edge of the network coverage and the blind handover is not allowed.

2. If there are multiple neighboring cells for blind handover, the RNC chooses the cell whose signal quality is larger thanBlindHOQualityCondition and the cell must support all the current services of UE. When there are multiple such cells, the RNC choosethe neighboring cell for blind handover randomly.

If any inter-frequency cell does not meet the above conditions, then the RNC chooses the inter-RAT cells with the highest priority of blindhandover. The blind handover priority of the cell is specified by the parameter BlindHOPrio.

10 Handover Protection

10.1 Anti-Ping-Pong

Inter-Frequency Anti-Ping-Pong

After an inter-frequency handover based on coverage or an inter-frequency blind handover based on event 1F occurs, the RNC starts theanti-ping-pong algorithm to prevent frequent switching between inter-frequency handovers triggered by different causes.

The inter-frequency anti-ping-pong algorithm is as follows:

1. When a coverage-based inter-frequency handover or an inter-frequency blind handover based on event 1F occurs, the RNC starts thetimer specified by IFAntiPingpangTimerLength for the UE.

2. When a non-coverage-based inter-frequency handover is triggered, the RNC determines whether the timer specified byIFAntiPingpangTimerLength expires.

− If the timer does not expire, the RNC cancels the handover.

− If the timer expires, the RNC performs the handover.

Inter-RAT (2G-to-3G) Anti-Ping-Pong

For the 2G-to-3G handover, the measurement control message is delivered through a system information broadcast of 2G when the 2Gcell has a neighboring 3G cell. The dual-mode MS performs the inter-RAT measurement in idle timeslots and reports the measurementresults. Based on the reported measurement values, the BSC decides whether to perform the handover to the 3G network.

To avoid the ping-pong handover between 2G and 3G, the 2G-to-3G handover penalty algorithm is used.

When the UE is handed over from 2G to 3G and if any CS domain service exists, the system increases the hysteresis of event 3A throughthe parameter InterRATPingPongHyst to prevent the UE from the ping-pong handover between 2G and 3G in the period specified by theparameter InterRATPingPongTimer. During the penalty time, the previous periodical report will be changed to the event 3A report. Thevalue 0 indicates that the system does not take measures to avoid ping-pong handover between 2G and 3G networks.

10.2 Handover Retry

10.2.1 Inter-Frequency Handover Retry

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If an inter-frequency handover based on event-triggered measurement report mode fails, the RNC initiates the inter-frequency handoverattempt according to inter-frequency retry algorithm.

After the inter-frequency handover fails, the retry timer for the cell is started.

After the retry timer expires, the UE makes a handover attempt to the cell again until the retry number exceeds the maximum allowed retrynumber. If the handover succeeds or two new event 2B reports are received, the periodical retry is stopped.

For the inter-frequency handover based on coverage or QoS, the following two parameters determine the retry period and the maximumnumber of retry times:

Retry timer: PeriodFor2B

Maximum number of retry times: AmntOfRpt2B

For the inter-frequency handover based on speed, the following two parameters determine the retry period and the maximum number ofretry times:

Retry timer: PeriodFor2C

Maximum number of retry times: AmntOfRpt2C

10.2.2 Inter-RAT (3G to 2G) Handover Retry

For an inter-RAT handover failure, if the cause of the failure is not a configuration failure and the retry timer expires, the UE makesattempts to hand over to the cell again until the retry number exceeds the maximum retry number.

The retry timer and maximum retry number for coverage-based and QoS-based inter-RAT handover are:

Retry timer: PeriodFor3A

Maximum number of retry times: AmntOfRpt3A

The retry timer and maximum retry number for LDR-based and service-based inter-RAT handover are:

Retry timer: PeriodFor3C

Maximum number of retry times: AmntOfRpt3C

The inter-RAT handover retry algorithm works in the following two signaling procedures:

Signaling Procedure for Iu Relocation

1. The RELOCATION REQUIRED message is initiated on the Iu interface.

2. If the RNC receives the RELOCATION PREPARATION FAILURE message, the inter-RAT handover fails.

If the cause of the failure is one of the following configuration failure, the RNC does not make a handover retry to the cell.

− Relocation Failure in Target CN/RNC or Target System, or

− Relocation not supported in Target RNC or Target System, or

− Relocation Target not allowed

Otherwise, the related retry timer for the cell is started. After the retry timer expires, the UE makes handover attempts to the cell againuntil the retry number exceeds the maximum retry number.

3. If the RNC receives the RELOCATION COMMAND message, the handover on the Uu interface continues.

4. If the handover succeeds or the new event 3A or 3C report is received, the periodical retry is stopped.

Signaling Procedure for Service-based Handover on the Uu Interface

For CS services or CS and PS combined services, the HANDOVER FROM UTRAN signaling procedure on the Uu interface is performedonly when the handover based on CS services is made.

For a PS service or combined PS services, the CELL CHANGE ORDER FROM UTRAN or HANDOVER FROM UTRAN signaling procedureon the Uu interface is performed.

If the HANDOVER FROM UTRAN FAILURE or CELL CHANGE ORDER FROM UTRAN FAILURE message is received, the handover on theUu interface fails.

If the "Inter-RAT handover failure cause" in HANDOVER FROM UTRAN FAILURE message is "Configuration unacceptable", or if the "Inter-RAT change failure cause" in CELL CHANGE ORDER FROM UTRAN FAILURE message is "Configuration unacceptable", the RNC doesnot make a handover retry to the cell.

Otherwise, the related retry timer for the cell is started. After the retry timer expires, the UE makes a handover attempt to the cell again untilthe retry number exceeds the maximum number.

If the handover succeeds or the new event 3A or 3C report is received, the periodical retry is stopped.

10.3 Inter-RAT Multimedia Fallback

This section involves the feature "WRFD-020307 Video Telephony Fallback to Speech (AMR) for Inter-RAT HO."

Before the RNC performs handover for the UE that is enjoying the video phone (VP) service, the RNC initiates multimedia fallback tochange the VP service to the Adaptive Multi Rate (AMR) speech service, that is, to perform the 3G-to-2G handover based on the CS AMRspeech service.

Overview of Fallback Service

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Compared with the traditional speech service of the GSM, the VP service of the UMTS can transmit not only speech services between thecalling party and the called party, but also the images and videos captured by both parties. Since the actual implementation is limited byterminals and networks, the VP service sometimes carries only speech and may fail to transmit images or videos. In this scenario, theService Change and Unrestricted Digital Information Fallback (SCUDIF) provide the fallback mechanism that changes a video call to acommon speech call.

As specified in 3GPP TS 23.172, the fallback service of the VP is categorized into the following two types:

The process of changing multimedia services back to speech services during call setup. The RNC does not take part in the process.Therefore, the detailed description of fallback process is not given.

The process of changing multimedia services back to speech services during the call.

Triggering of Fallback Service

Currently, the network-initiated multimedia fallback is performed only for the 3G-to-2G handover. Service changes triggered by the UEs arenot supported.

Fallback is initiated when both of the following occasions are met:

The RNC decides to send an inter-RAT handover request after receiving periodical measurement reports of event 1A, 3A, or 3C.

The service is combined with a VP, and the "Alternative RAB Parameters" in the RAB ASSIGNMENT message is a valid AMR speechformat.

Procedure of Service Change

Figure 10-1 shows the service change procedure for the 3G-to-2G handover. The network initiates the service change, that is, the RNCinitiates the change from the VP service to the speech service during the call.

Figure 10-1 Service change procedure for the 3G-to-2G handover in the CS domain

1. The CN sends the SRNC a RANAP RAB ASSIGNMENT REQUEST message to set up the VP service.

2. During 3G-to-2G handover, the SRNC sends a RANAP RAB MODIFY REQUEST message to change the VP service to the AMR speechservice. In the 3GPP R6 protocol, the information element (IE) Alternative RAB Configuration Request is also added to the RABMODIFY REQUEST message, which enables the RNC to request the CN to change the VP service to the AMR speech service.

3. The MSC initiates the Bearer Capability (BC) negotiation with the UE.

4. After the negotiation, the RNC is requested to perform service change.

When the multimedia fallback ends, the RNC decides whether to perform the 3G-to-2G handover according to the current measurementsreported by the UE.

At the beginning of the service setup, the RNC saves the RAB parameters.

The CN initiates the RAB reconfiguration to request both parties to perform the multimedia fallback. The single VP service falls back to thesingle AMR speech service. The multi-RAB service combined with VP falls back to the multi-RAB service combined with AMR. If themultimedia fallback succeeds, that is, the video phone in the service falls back to speech successfully, the inter-RAT handover is initiated.Otherwise, the inter-RAT handover fails.

10.4 Transfering Event Report to Periodical Report

After a UE reports event 1A, 1C or, 1J to the RNC, the RNC may miss the measurement reports. If the reported cell does not join active setin a specified period of time, the UE starts to report the event periodically to avoid missing of measurement reports.

This parameter specifies the reporting period of event 1A. That is, event 1A is reported at each reporting interval.

ReportIntervalfor1A

ReportIntervalfor1C

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ReportIntervalfor1J

The following parameters specify the number of reporting times of events for periodical reporting. When the actual reporting times exceedsthe set value, the periodical reporting ends.

PeriodMRReportNumfor1A

PeriodMRReportNumfor1C

PeriodMRReportNumfor1J

11 Neighboring Cell CombinationOverview

After the active set is updated, the RNC updates the neighboring cell list by using the neighboring cell combination algorithm according tothe status of the active set. This list includes the new intra-frequency, inter-frequency, and inter-RAT neighboring cells. The combinationmethods of intra-frequency handover, inter-frequency handover, and inter-RAT handover are the same.

If the radio link of the drift RNC (DRNC) is added to the active set, the source RNC (SRNC) buffers the intra-frequency, inter-frequency,and inter-RAT neighboring cell lists of the DRNC until the radio link of the DRNC is released.

The neighboring cell combination result is contained in the MEASUREMENT CONTROL message and sent to the UE, which instructs theUE to perform intra-frequency, inter-frequency, and inter-RAT measurement and handover procedures.

The maximum number of neighboring cells of a cell that can be configured is as follows:

The maximum number of intra-frequency neighboring cells is 32, which includes the cell itself.

The maximum number of inter-frequency neighboring cells of single carrier is 32.

The maximum number of inter-frequency neighboring cells of multi-carrier is 64.

The maximum number of inter-RAT neighboring cells of multi-carrier is 32

Neighboring Cell Combination Switch

HOSWITCH: HO_MC_NCELL_COMBINE_SWITCH is the neighboring cell combination switch.

If the switch is set to ON, measurement objects are chosen from the neighboring cells of all the cells in the active set.

If the switch is set to OFF, measurement objects are chosen from the neighboring cells of the best cell.

HOSWITCH: HO_MC_NCELL_COMBINE_SWITCH is set to ON by default.

Procedure of the Neighboring Cell Combination

After obtaining the intra-frequency, inter-frequency, and inter-RAT neighboring cells of each cell in the active set, the RNC calculates thecombined neighboring cell set, which is referred as Sall, by using the following method.

These neighboring cells and active cells are added to Sall in the following order until the number reaches the maximum number of

neighboring cells:

Step 1 The best cell in the active is added to Sall.

The best cell is reported on event 1D.

Step 2 Other cells in the active set are added to Sall in the in descending order by CPICH Ec/No.

Step 3 The neighboring cells of the best cell in the active set are added to Sall.

NprioFlag (the flag of the priority) and Nprio (the priority of the neighboring cell), which are set for each neighboring cell, are used tochange the order of adding the neighboring cells to Sall.

When NprioFlag is switched to FALSE, NPrio is cleared.

When NprioFlag is switched to TRUE, NPrio is set simultaneously.

Step 4 The neighboring cells of other cells in the active set are added to Sall in descending order by CPICH Ec/No values of these cells inthe active set. The number to be repeatedly added of each neighboring cell is recorded.

The neighboring cells of the same cell in the active set are added according to Nprio.

If the number of the cells in Sall is more than maximum number of neighboring cells, delete the neighboring cells whose repeated number in

Sall is less. The best cell and its neighboring cells will not be deleted.

----End

12 Compressed Mode

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Overview

Compressed mode control is a mechanism whereby certain idle periods are created in radio frames during which the UE can performmeasurements on other frequencies. The UE must use the compressed mode if the UE needs to measure the pilot signal strength of aninter-frequency cell or inter-RAT cell and has a single-frequency receiver only.

Figure 12-1 Compressed mode

Compressed Mode Switches

The parameter DlSFLimitCMInd decides whether to start the DL compressed mode according to the parameter LimitCMDlSFThd.

If DlSFLimitCMInd = True,

− When the downlink spreading factor is smaller than or equal to the parameter LimitCMDlSFThd, the compressed mode is disabled.

− When the downlink spreading factor is greater than the parameter LimitCMDlSFThd, the compressed mode is enabled.

If DlSFLimitCMInd = False, the compressed mode is not limited by the downlink spreading factor.

The uplink 384kbps uses SF4. The method of SF/2 is not allowed for the services of SF4.

CMCF_UL_PRECFG_TOLERANCE_SWITCH under CmcfSwitch determines whether to set up the uplink RB of SF4 during thepreparation for SF/2 compressed mode.

If CMCF_UL_PRECFG_TOLERANCE_SWITCH is set to ON, the RB of SF4 can be set up during the preparation for SF/2 compressedmode. The inter-frequency or inter-RAT handover measurement, however, cannot be triggered, because SF4 cannot be compressed toSF2.

If CMCF_UL_PRECFG_TOLERANCE_SWITCH is set to OFF, the RB of SF4 cannot be set up during the preparation for SF/2compressed mode. The system can trigger the SF/2 compressed mode measurement.

CMCF_WITHOUT_UE_CAP_REPORT_SWITCH under CmcfSwitch determines whether to use the frequencies beyond the range of UEreports on the compressed mode measurement.

To initiate the high layer scheduling, set the following two switches:

If the algorithm switch CMCF_DL_HLS_SWITCH in the command SET UCORRMALGOSWITCH is set to ON, the DL high-layer schedulingfor the compressed mode is allowed.

If the algorithm switch CMCF_UL_HLS_SWITCH in the command SET UCORRMALGOSWITCH is set to ON, the UL high-layer schedulingfor the compressed mode is allowed.

Compression Methods

There are two methods to implement the compressed mode as follows:

Method Description

SF/2 The SF is reduced by half to improve the rate on the channel. It takes less time totransmit the same volume of data. In this way transmit gaps are created. The SF mustbe larger than 4.

The SF/2 mode consumes more system resources and therefore this mode isrecommended only for low-rate users.

High layerscheduling

High layer limits the allowed TFC (Transport Format Combination) to create gapswithout data to be transmitted.

The high-layer scheduling mode requires variable multiplexing positions of transportchannels and is applicable to a relatively narrow range. In addition, this approachaffects the transmission rate of users. Therefore, this mode is recommended onlywhen the SF/2 approach is unavailable or there are high-rate users.

The RNC automatically determines the type of compressed mode on the basis of the spreading factor used in the uplink or the downlink.

When the downlink spreading factor is greater than or equal to the parameter DlSFTurnPoint, the SF/2 approach is preferred.Otherwise, the high layer scheduling is used.

When the uplink spreading factor is greater than or equal to the parameter UlSFTurnPoint, the SF/2 approach is preferred. Otherwise,the high layer scheduling is used.

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Compression Types

The compression types are as follows:

Inter-frequency measurement

Inter-RAT measurement

Coexistence of inter-frequency and inter-RAT

The parameter InterFreqRATSwitch determines the compression types allowed by the RNC

If the parameter is set to INTERFREQ, the RNC allows the UE to perform only inter-frequency measurement

If the parameter is set to INTERRAT, the RNC allows the UE to perform only Inter-RAT measurement.

If the parameter is set to SIMINTERFREQRAT, the RNC allows the UE to perform both inter-frequency and inter-RAT measurement.

During the concurrent inter-frequency and inter-RAT measurement, the parameter CoexistMeasThdChoice decides the event 2Dthreshold:

When the parameter is set to COEXIST_MEAS_THD_CHOICE_INTERFREQ, the inter-frequency measurement threshold for event 2D isused.

When the parameter is set to COEXIST_MEAS_THD_CHOICE_INTERRAT, the inter-RAT measurement threshold for event 2D is used.

Measurement Timer Length

When the UE takes a long time to perform the inter-frequency measurement in compressed mode, the radio network will be affected. Toavoid the influence, the RNC stops the inter-frequency measurement and disables the compressed mode if no inter-frequency handoveroccurs upon expiry of the inter-frequency measurement timer.

The timer is specified by InterFreqMeasTime in inter-frequency handover based on coverage, load or HCS.

The timer is specified by InterRATMeasTime in inter-RAT handover based on coverage, load, or service.

The timer is specified by DLQosMcTimerLen or ULQosMcTimerLen in inter-RAT handover based on downlink or uplink QoS respectively.

Compatibility Switch for Dual-frequency Receiver

If the UE has a dual-frequency receiver, it can perform inter-frequency measurement without starting the compressed mode if all of thefollowing conditions are met:

The CMP_UU_ADJACENT_FREQ_CM_SWITCH is on.

The value of the IE "Adjacent frequency measurements without compressed mode" reported by the UE is TRUE.

For the UE that supports dual-carrier HSDPA (DC-HSDPA):

− If the UE has a DC-HSDPA service, all the cells involved in inter-frequency measurement are at the same frequency as thesupplementary carrier.

− If the UE does not have a DC-HSDPA service, all the cells involved in inter-frequency measurement are at the same frequency, with a 5MHz spacing from the current cell, but within the same band as the current cell.

Each physical frame can provide three to seven timeslots for the inter-frequency or inter-RAT cell measurement.

Compatibility Switches for HSPA

There are some UEs that do not support the CM when an HSPA+ or HSDPA or HSUPA service is active. For compatibility reasons withthese UE, compatibility switch parameters have been introduced.

The parameter HsdpaCMPermissionInd is used to enable or disable CM for HSDPA users.

If this parameter value is TRUE, CM is permitted on HSDPA and HSDPA can be activated with CM activated. If this parameter value isFALSE, H2D is needed before CM activated when HSDPA exists and HSDPA cannot exist when CM is activated.

The parameter HsupaCMPermissionInd decides whether the compressed mode (CM) can be used on HSUPA.

If the parameter is set to Permit, the UE in E-DCH state performs measurement.

If the parameter is set to Limited, the reconfiguration from E-DCH to DCH is required before CM is activated because HSUPA does notsupport CM.

If the parameter is set to BasedOnUECap, the RNC determines whether to perform E2D procedure before CM activated based on theUE capability.

The parameter EHSPACMPermissionInd indicates whether the compressed mode (CM) can coexist with the HSPA+ service.

When the EHSPACMPermissionInd value is FALSE the switch is deactivated and the RNC, before request to the UE to start the CM,starts a RB RECONFIGURATION procedure to degrade the HSPA+ service to DCH, than requests the UE to start the COMPRESSEDMODE.

− After the Hard Handover is completed the RNC starts a RB RECONFIGURATION procedure to promote the DCH service to HSPA+

− When this switch is disabled all the HSPA+ UEs (CM and not CM capable) are degraded to DCH before the CM procedure.

When the EHSPACMPermissionInd value is TRUE the switch is activated and the RNC does not triggers the RB RECONFIGURATIONprocedure before to request the CM. Not affected UEs are capable to start the measurements during the HSPA+ service and canperform the Hard Handover without service degrades. On the contrary, UEs that do not support the CM during HSPA+ are not capable tocomplete the Hard Handover procedure successfully.

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13 Parameters

Table 13-1 Parameter description

Parameter ID NE MML Command Description

AmntOfRpt2B BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Maximum number of inter-frequency handoverre-attempts after event 2B is reported when themeasurement control message is valid.

If this parameter is set to a greater value, the number ofinter-frequency handover re-attempts increases and thepossibility of successfully handing over the UE to thetarget cell whose load becomes normal increases. Whenthe number of inter-frequency handover re-attemptsreaches the threshold, the RNC sends another inter-frequency measurement control message to allow the UEto be handed over to other cells of this frequency.

If the measurement control is released, the inter-frequency handover re-attempt is stopped.

GUI Value Range: 0~63

Actual Value Range: 0~62, 63: Infinity

Default Value: 4

AmntOfRpt2C BSC6900ADDUCELLINTERFREQHONCOV(Optional)

MODUCELLINTERFREQHONCOV(Optional)

Meaning: Maximum number of handover attempts forevent 2C.

This parameter specifies the maximum number ofhandover re-attempts for event 2C when themeasurement control message is valid. If this parameteris set to a greater value, inter-frequency handover re-attempts increase and the possibility of successfullyhanding over the UE to the target cell whose loadbecomes normal increases. When the number of re-attempts reaches the preset value, the RNC does notattempt to perform the handover. Alternatively, when themeasurement control is cancelled, the handover re-attempt is stopped immediately.

GUI Value Range: 0~63

Actual Value Range: 0~62, 63: Infinity

Default Value: 1

AmntOfRpt3A BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Maximum number of handover attempts afterinter-RAT handover triggered by event 3A fails.

This parameter specifies the maximum number ofhandover re-attempts for event 3A when themeasurement control is valid. If this parameter is set to agreater value, the number of inter-RAT handover re-attempts increases and the possibility of successfullyhanding over the UE to the target cell whose loadbecomes normal increases. After reaching the valuespecified by this parameter, the RNC makes no furtherhandover attempt to the target cell. If the compressedmode is disabled, the handover re-attempt will beaborted.

GUI Value Range: 0~63

Actual Value Range: 0~62, 63: Infinity

Default Value: 4

AmntOfRpt3C BSC6900ADDUCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

Meaning: Maximum number of handover re-attempts forevent 3C.

This parameter specifies the maximum number ofhandover attempts for event 3C when the measurementcontrol message is valid. If this parameter is set to agreater value, the number of inter-RAT handover re-attempts increases and the possibility of successfullyhanding over the UE to the target cell whose loadbecomes normal increases. After reaching the valuespecified by this parameter, the RNC makes no furtherhandover attempt to the target cell. If the compressedmode is disabled, the handover re-attempt will beaborted.

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GUI Value Range: 0~63

Actual Value Range: 0~62, 63: Infinity

Default Value: 1

BSICVerify BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Switch for verifying the Base Station IdentityCode (BSIC).

This parameter is used to control cells where inter-RATmeasurement reports are triggered. When the parameteris set to "REQUIRED", the measurement reporting istriggered after the BSIC of the measured cell is decodedcorrectly. When the parameter is set to"NOT_REQUIRE", the measurement reporting istriggered regardless of whether the BSIC of themeasured cell is decoded correctly. This parameter isvalid for both periodical reporting mode and event-triggered reporting mode. However, to ensure handoverreliability, it is recommended that the system reports onlythe cells whose BSIC is decoded correctly, that is, therecommended value of the parameter is "REQUIRED". Ifthe parameter is set to "NOT_REQUIRED", handoversare likely to be triggered, but the handover reliability islower than that in the situation the parameter is set to"REQUIRED".

GUI Value Range: REQUIRED(Verify mode),NOT_REQUIRE(Non-verify mode)

Actual Value Range: REQUIRED, NOT_REQUIRE

Default Value: REQUIRED

BlindHOIntrafreqMRAmount BSC6900SET UINTRAFREQHO(Optional) Meaning: Used in the algorithm of the load reshuffling(LDR) intra-frequency blind handover. This parameterspecifies the number of the required measurementreports that fulfill the handover criterion before the blindhandover decision is triggered. The RNC initiates blindhandover only when the UE continuously reportsadequate intra-frequency measurement reports that fulfillthe quality criterion for blind handover. If the UE reportsan unqualified measurement report, the measurementprocess is stopped. In this case, the RNC does notinitiate blind handover.

GUI Value Range: D1, D2, D4, D8

Actual Value Range: 1, 2, 4, 8

Default Value: D2

BlindHOIntrafreqMRInterval BSC6900SET UINTRAFREQHO(Optional) Meaning: This parameter specifies the interval betweenintra-frequency measurement reports for LoadReshuffling (LDR) blind handover.

GUI Value Range: D250, D500

Actual Value Range: 250, 500

Default Value: D250

BlindHOPrio BSC6900ADD U2GNCELL(Mandatory)

MOD U2GNCELL(Mandatory)

Meaning: Priority of the neighboring cell for blindhandover.

The value 0 represents the highest priority. Priorities 0 to15 are assigned to concentric neighboring cells, whichcan ensure successful blind handover. Priorities 16 to 30are assigned to the neighboring cells, which cannotensure successful blind handover.

GUI Value Range: 0~30

Actual Value Range: 0~30

Default Value: None

BlindHOQualityCondition BSC6900ADD UINTERFREQNCELL(Optional)

MOD UINTERFREQNCELL(Optional)

Meaning: Quality condition for triggering the blindhandover.

If this parameter is not set to -115, a conditional blindhandover can be triggered in an inter-frequencyneighboring cell with the same coverage. If thisparameter is set to -115, a direct blind handover can betriggered in an inter-frequency neighboring cell with thelarger coverage.

GUI Value Range: -115~-25

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Actual Value Range: -115~-25

Default Value: -92

BlindHORSCP1FThreshold BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Threshold of the quality of the cell reportingevent 1F for triggering blind handover. The blindhandover is triggered only when the signal quality in thecell, which reports event 1F, exceeds this parameter.Otherwise, the report is discarded.

This parameter is used to raise the success rate of blindhandovers. If all the signals in the cell reporting event 1Fare of poor quality, the user may be located at the edgeof coverage area. Under this situation, triggering blindhandover rashly may cause call drops.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -115

BlindHoFlag BSC6900ADD UINTERFREQNCELL(Optional)

MOD UINTERFREQNCELL(Optional)

Meaning: Whether to perform blind handover.

The value FALSE indicates that the cell is not consideredas a candidate cell for blind handover. Therefore, blindover to this cell cannot be triggered.

GUI Value Range: FALSE, TRUE

Actual Value Range: FALSE, TRUE

Default Value: FALSE

CIO BSC6900ADD UEXT2GCELL(Optional)

MOD UEXT2GCELL(Optional)

Meaning: It is set according to the topographic feature.

This parameter is used for the inter-RAT handoverdecision in combination with the neighboring cell orientedCIO. The larger the sum, the higher the handover priorityof the GSM cell. The smaller the sum, the lower thehandover priority of the GSM cell. The parameter isgenerally set to 0.

As for the impact on network performance:

The larger the value of the parameter is, the easier it isto be handed over to the GSM network. The smaller thevalue of the parameter is, the harder it is to be handedover to the GSM network.

GUI Value Range: -50~50

Actual Value Range: -50~50

Default Value: 0

CIO BSC6900ADD UCELLSETUP(Optional)

MOD UCELLSETUP(Optional)

Meaning: This parameter works with the offset ofneighboring cell-oriented Cell Individual Offset (CIO). It isused for intra- or inter-frequency handover decisions.For details, refer to 3GPP TS 25.331.

GUI Value Range: -20~20

Actual Value Range: -10~10

Default Value: 0

CIOOffset BSC6900ADD U2GNCELL(Optional)

MOD U2GNCELL(Optional)

Meaning: Cell individual offset for the GSM cell.

This parameter is used for decision making for the inter-RAT handover. A larger value of the parameter indicatesthe higher the handover priority of the GSM cell. Asmaller the value of the parameter indicates the lowerthe handover priority of the GSM cell.

GUI Value Range: -50~50

Actual Value Range: -50~50

Default Value: 0

CIOOffset BSC6900ADD UINTERFREQNCELL(Optional)

MOD UINTERFREQNCELL(Optional)

Meaning: Neighboring cell oriented CIO.

This parameter specifies the neighboring cell orientedCell Individual Offset (CIO). The sum of the value of thisparameter, the value of the cell oriented CIO, and theactual measurement quantity is used for the eventevaluation of the UE or used for the handover decisionprocedure on the RNC side. In a handover algorithm, thisparameter is used for moving the border of a cell. In thecase of an event-based intra-frequency measurement orinter-RAT measurement, the UE determines whether totrigger an event according to the sum of the value of this

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parameter, the value of the cell oriented CIO, and theactual measurement quantity. The UE does not considerthe value of this parameter when evaluating an inter-frequency measurement event.

In the case of a periodical inter-frequency measurementor inter-RAT measurement, the RNC determines whetherto initiate a handover according to the sum of the valueof this parameter, the value of the cell.

GUI Value Range: -20~20

Actual Value Range: -10~10

Default Value: 0

CIOOffset BSC6900ADD UINTRAFREQNCELL(Optional)

MOD UINTRAFREQNCELL(Optional)

Meaning: Neighboring cell oriented CIO.

This parameter specifies the neighboring cell orientedCell Individual Offset (CIO). The sum of the value of thisparameter, the value of the cell oriented CIO, and theactual measurement quantity is used for the eventevaluation of the UE or used for the handover decisionprocedure on the RNC side. In a handover algorithm, thisparameter is used for moving the border of a cell. In thecase of an event-based intra-frequency measurement orinter-RAT measurement, the UE determines whether totrigger an event according to the sum of the value of thisparameter, the value of the cell oriented CIO, and theactual measurement quantity. The UE does not considerthe value of this parameter when evaluating an inter-frequency measurement event.

In the case of a periodical inter-frequency measurementor inter-RAT measurement, the RNC determines whetherto initiate a handover according to the sum of the valueof this parameter, the value of the cell.

GUI Value Range: -20~20

Actual Value Range: -10~10

Default Value: 0

CSHOOut2GloadThd BSC6900ADDUCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

Meaning: This parameter specifies the threshold for 2Gload of relocation target, in an inter-RAT handover in CSdomain. When the GSM load policy is used, that is, when"NcovHoOn2GldInd" in "SET UINTERRATHONCOV" is setto ON, a non-coverage-based handover to a 2G cell isstopped in a non-coverage-based 3G-to-2G handoverprocedure if the uplink or downlink normalized loadcarried in the relocation response message from the 2Gsystem exceeds the value of this parameter.

GUI Value Range: 0~100

Actual Value Range: 0~1

Default Value: 80

CSServiceHOSwitch BSC6900ADD UCELLHOCOMM(Optional)

MOD UCELLHOCOMM(Optional)

Meaning: Whether the cell allows inter-RAT handover forCS services.

When the switch is set to ON, the inter-RAT handover forCS services is enabled. When the switch is set to OFF,the inter-RAT handover for CS services is disabled.

Based on the Service Handover Indicator of a serviceand the related parameter configurations on the networkside, related measurements and inter-RAT handover aretriggered immediately once a service is set up. Thisswitch is set to ON only when service handover isrequired. Generally, the switch is set to OFF.

Note that the service handover is triggered only when theService Handover Indicator is set toHO_TO_GSM_SHOULD_BE_PERFORM and the inter-RAT handover switch for the corresponding service is setto ON. Both conditions are mandatory. For hybridservices, the service handover is not triggered.

GUI Value Range: OFF, ON

Actual Value Range: OFF, ON

Default Value: OFF

CSVoiceOverHspaSuppInd BSC6900ADD UNRNC(Optional)

MOD UNRNC(Optional)

Meaning: Indicates whether degrade HSPA to DCHprocedure is performed before the relocation procedure

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when the CS services are carried on the HSPA. If thisparameter is set to OFF, the HSPA needs to bedegraded to the DCH before the relocation procedure. Ifthis parameter is set to ON, the HSPA need not bedegraded to the DCH before the relocation procedure.

GUI Value Range: OFF, ON

Actual Value Range: OFF, ON

Default Value: OFF

CellCapContainerFdd BSC6900ADD UEXT3GCELL(Mandatory)

MOD UEXT3GCELL(Optional)

Meaning: 1)DELAY_ACTIVATION_SUPPORT (delayactivation support indicator):when the indicator is TRUE,it means that the cell support delay activation. DelayedActivation IE indicates that the activation of the DL powershall be delayed until an indicated CFN or until aseparate activation indication is received.

2)HSDSCH_SUPPORT(HSDSCH support indicator):whenthe indicator is TRUE, it means that the cell supportHSDSCH and enable downlink traffic to be established inHSDSCH.

3)FDPCH_SUPPORT(F-DPCH support indicator):whenthe indicator is TRUE, it means that the cell support F-DPCH and enable downlink signal to be established in F-DPCH, but the cell can not support F-DPCH if it does notsupport HSDSCH.

4)EDCH_SUPPORT(E-DCH support indicator):when theindicator is TRUE, it means that the cell support E-DCHand enable uplink signal and traffic to be established inE-DCH.

5)EDCH_2MS_TTI_SUPPORT(E-DCH 2ms TTI supportindicator):when the indicator is TRUE, it means that thecell support E-DCH 2ms TTI.

6)EDCH_2SF2_AND_2SF4_SUPPORT(E-DCH max SFsupport 2SF2+2SF4 indicator):when the indicator isTRUE, it means that the cell has E-DCH SF capability of2SF2+2SF4.

7)EDCH_2SF2_SUPPORT(E-DCH max SF support 2SFindicator):when the indicator is TRUE, it means that thecell has E-DCH SF capability of 2SF2.

8)EDCH_2SF4_SUPPORT(E-DCH max SF support 2SF4indicator):when the indicator is TRUE, it means that thecell has E-DCH SF capability of 2SF4.

9)EDCH_SF4_SUPPORT(E-DCH max SF support SF4indicator):when the indicator is TRUE, it means that thecell has E-DCH SF capability of SF4.

10)EDCH_SF8_SUPPORT(E-DCH max SF support SF8indicator):when the indicator is TRUE, it means that thecell has E-DCH SF capability of SF8.

11)EDCH_HARQ_IR_COMBIN_SUPPORT(E-DCHsupport HARQ IR Combining indicator):when theindicator is TRUE, it means that the cell use IR combineMode when MAC-e PDUs are received more than onetime in E-DCH.

12)EDCH_HARQ_CHASE_COMBIN_SUPPORT(E-DCHsupport HARQ CHASE Combining indicator): when theindicator is TRUE, it means that the cell use CHASEcombine Mode when MAC-e PDUs are received morethan one time in E-DCH.

13) CPC_DTX_DRX_SUPPORT (CPC DTX-DRX supportindicator): when the indicator is TRUE, it indicates thatthe cell supports CPC DTX_DRX.

14) CPC_HS_SCCH_LESS_OPER_SUPPORT (CPC HS-SCCH less operation support indicator): when theindicator is TRUE, it indicates that the cell supports CPCHS-SCCH less operation.

15) HSPAPLUS_MIMO_SUPPORT (MIMO supportindicator): when the indicator is TRUE, it indicates thatthe cell supports MIMO.

16) FLEX_MACD_PDU_SIZE_SUPPORT (flexible MAC-dPDU Size support indicator): when the indicator is TRUE,it indicates that the cell supports flexible MAC-d PDU

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Size.

17) FDPCH_SLOT_FORMAT_SUPPORT (F-DPCH slotformat support indicator): when the indicator is TRUE, itindicates that the cell supports F-DPCH slot format,which depends on FDPCH. If F-DPCH slot format is set tosupport in the cell, it should support FDPCH too.whenthe indicator is TRUE, the indicator FDPCH_SUPPORTshoud be set true.

18) HSPAPLUS_DL_64QAM_SUPPORT (downlink64QAM support indicator): when the indicator is TRUE, itindicates that the cell supports downlink 64QAM.

GUI Value Range:DELAY_ACTIVATION_SUPPORT(delay activationsupport indication), HSDSCH_SUPPORT(HSDSCHsupport indication), FDPCH_SUPPORT(F-DPCH supportindication), EDCH_SUPPORT(E-DCH support indication),EDCH_2MS_TTI_SUPPORT(E-DCH 2ms TTI supportindicator), EDCH_2SF2_AND_2SF4_SUPPORT(E-DCHmax SF support 2SF2+2SF4 indicator),EDCH_2SF2_SUPPORT(E-DCH max SF support 2SF2indicator), EDCH_2SF4_SUPPORT(E-DCH max SFsupport 2SF4 indicator), EDCH_SF4_SUPPORT(E-DCHmax SF support SF4 indicator),EDCH_SF8_SUPPORT(E-DCH max SF support SF8indicator), EDCH_HARQ_IR_COMBIN_SUPPORT(E-DCHsupport HARQ IR Combining indicator),EDCH_HARQ_CHASE_COMBIN_SUPPORT(E-DCHsupport HARQ CHASE Combining indicator),CPC_DTX_DRX_SUPPORT(CPC DTX-DRX supportindicator),CPC_HS_SCCH_LESS_OPER_SUPPORT(CPC HS-SCCH less operation support indicator),HSPAPLUS_MIMO_SUPPORT(MIMO support indicator),FLEX_MACD_PDU_SIZE_SUPPORT(flexible MAC-d PDUSize support indicator),FDPCH_SLOT_FORMAT_SUPPORT(F-DPCH slot formatsupport indicator),HSPAPLUS_DL_64QAM_SUPPORT(downlink 64QAMsupport indicator)

Actual Value Range: DELAY_ACTIVATION_SUPPORT,HSDSCH_SUPPORT, FDPCH_SUPPORT,EDCH_SUPPORT, EDCH_2MS_TTI_SUPPORT,EDCH_2SF2_AND_2SF4_SUPPORT,EDCH_2SF2_SUPPORT, EDCH_2SF4_SUPPORT,EDCH_SF4_SUPPORT, EDCH_SF8_SUPPORT,EDCH_HARQ_IR_COMBIN_SUPPORT,EDCH_HARQ_CHASE_COMBIN_SUPPORT,CPC_DTX_DRX_SUPPORT,CPC_HS_SCCH_LESS_OPER_SUPPORT,HSPAPLUS_MIMO_SUPPORT,FLEX_MACD_PDU_SIZE_SUPPORT,FDPCH_SLOT_FORMAT_SUPPORT,HSPAPLUS_DL_64QAM_SUPPORT

Default Value: None

CellsForbidden1A BSC6900ADD UINTRAFREQNCELL(Optional)

MOD UINTRAFREQNCELL(Optional)

Meaning: Determines whether event 1A threshold isaffected when the cell is added to the active set. If thisparameter is set to "NOT_AFFECT", the relativethreshold of event 1A is not affected when the cell isadded to the active set. That is, the cell signals are notinvolved when the UE evaluates whether event 1A shouldbe triggered. If this parameter is set to "AFFECT", therelative threshold of event 1A is affected when the cell isadded to the active set. That is, the cell signals areinvolved when the UE evaluates whether event 1A shouldbe triggered.

GUI Value Range: AFFECT, NOT_AFFECT

Actual Value Range: AFFECT, NOT_AFFECT

Default Value: AFFECT

CellsForbidden1B BSC6900ADD UINTRAFREQNCELL(Optional)

MOD UINTRAFREQNCELL(Optional)

Meaning: Flag of whether adding a cell into the active setwill affect the relative threshold of the event 1B.

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This parameter is a flag of whether adding the cell intothe active set will affect the relative threshold of theevent 1B NOT_AFFECT: Adding the cell into the activeset does not affect the relative threshold of the event 1B.The cell signal will affect the UE evaluate whether event1B should occur. AFFECT: Adding the cell into the activeset affects the relative threshold of the event 1B. The cellsignal will not affect the UE evaluate whether event 1Bshould occur.

GUI Value Range: AFFECT, NOT_AFFECT

Actual Value Range: AFFECT, NOT_AFFECT

Default Value: AFFECT

ChannelRetryHoTimerLen BSC6900SET UCOIFTIMER(Optional) Meaning: This parameter specifies the value of thechannel retry handover timer.

When handover is performed and some higher HSPA orHSPA plus technique is supported, UTRAN will trigger thereconfiguration for the higher techniques.

Pingpang will happen when the reconfiguration istriggered immediately when handover succeeds,because handover procedure is frequently.

In order to avoid the pingpang, this timer will start afterhandover procedure is performed, and thereconfiguration will not be triggered until the timerexpires.

GUI Value Range: 0~999

Actual Value Range: 0~999

Default Value: 2

ChannelRetryTimerLen BSC6900SET UCOIFTIMER(Optional) Meaning: This parameter specifies the value of thechannel retry timer. The timer will start when traffic is setup or reconfigured and some higher technique is notconfigured by some reason except for the capability ofUE or cell. Channel retry will be performed after this timerexpires.

GUI Value Range: 0~180

Actual Value Range: 0~180

Default Value: 5

CmcfSwitch BSC6900SETUCORRMALGOSWITCH(Optional)

Meaning: CMCF algorithm switch group.

1) CMCF_DL_HLS_SWITCH: When the switch is on, thecompressed mode supports DL higher-layer scheduling.

2) CMCF_UL_HLS_SWITCH: When the switch is on, thecompressed mode supports UL higher-layer scheduling.

3) CMCF_UL_PRECFG_TOLERANCE_SWITCH: Whenthe switch is on, the compressed mode of the UE in thecompressed mode pre-configuration state can bedifferent from that required by current traffic.

4) CMCF_WITHOUT_UE_CAP_REPORT_SWITCH:When the RNC starts inter-frequency or inter-RATmeasurement, the RNC checks the information ofwhether the compressed mode is required formeasurement on the frequency band of the cells inmeasurement list. The information should be reported bythe UE in RRC connect setup complete message. Whenthe switch is on and no such information has beenreported, the RNC starts the compressed mode and thendelivers the measurement.

GUI Value Range: CMCF_DL_HLS_SWITCH,CMCF_UL_HLS_SWITCH,CMCF_UL_PRECFG_TOLERANCE_SWITCH,CMCF_WITHOUT_UE_CAP_REPORT_SWITCH

Actual Value Range: CMCF_DL_HLS_SWITCH,CMCF_UL_HLS_SWITCH,CMCF_UL_PRECFG_TOLERANCE_SWITCH,CMCF_WITHOUT_UE_CAP_REPORT_SWITCH

Default Value: None

CmpSwitch BSC6900SETUCORRMALGOSWITCH(Optional)

Meaning: Compatibility switch group.

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1) CMP_IU_IMS_PROC_AS_NORMAL_PS_SWITCH:When the switch is on, the IMS signaling assigned by theCN undergoes compatibility processing as an ordinaryPS service. When the switch is not on, no specialprocessing is performed.

2)CMP_IU_QOS_ASYMMETRY_IND_COMPAT_SWITCH:When the Iu QoS Negotiation function is active and theswitch is on, IE RAB Asymmetry Indicator is Symmetricbidirectional, The uplink and downlink RNC negotiationrate is asymmetric, RNC select the bigger rete as Iu QoSnegotiation rate. When the switch is OFF, RNC select theless rate as Iu QoS negotiation rate.

3) CMP_IU_SYSHOIN_CMP_IUUP_FIXTO1_SWITCH:When the switch is on, the IUUP version can be rolledback to R99 when complete configurations are appliedduring inter-RAT handover.

4) CMP_IUR_H2D_FOR_LOWR5_NRNCCELL_SWITCH:When the switch is on, H2D is performed before aneighboring RNC cell whose version is earlier than R5 isadded to the active set; E2D is performed before aneighboring RNC cell whose version is earlier than R6 isadded to the active set. If the DRNC is of a versionearlier than R5, DL services cannot be mapped on theHS-DSCH. If the DRNC is of a version earlier than R6, DLservices cannot be mapped on the HS-EDCH.

5) CMP_IUR_SHO_DIVCTRL_SWITCH: When the switchis on, the diversity combination over the Iur interface isconfigured on the basis of that of the local RNC. Whenthe switch is not on, the diversity combination over the Iurinterface is configured on the basis of services. The flagof diversity combination over the Iur interface can be setto MUST (for BE services) or MAY (for other services).

6) CMP_UU_ADJACENT_FREQ_CM_SWITCH: when theswitch is on, the RNC initiates the inter-frequencymeasurement without activating the compressed mode ifthe following two conditions are met: the UE supports thenon-compressed inter-frequency measurement, theinter-frequency neighboring cells work in a samefrequency which is within 5 MHz higher or lower than thecurrent frequency; when the switch is off, the RNCactivates the compressed mode before initiating theinter-frequency measurement.

7) CMP_UU_AMR_DRD_HHO_COMPAT_SWITCH: Whenthe switch is on, When SRB is set up on DCH, and RNCdecides to setup the AMR through DRD procedure, RNCwill execute blind handover to the target cell, and thensetup the AMR RBs on the target cell.

8) CMP_UU_AMR_SID_MUST_CFG_SWITCH: Fornarrowband AMR services, when the switch is on, the SIDframe is always configured; when the switch is not on, theSID frame is configured on the basis of CN assignment.

9) CMP_UU_FDPCH_COMPAT_SWITCH: When theswitch is OFF, if the information element that indicatesthe F-DPCH capability of UE exists in the message"RRC_CONNECT_REQ" or"RRC_CONNECT_SETUP_CMP", the F-DPCH capabilitydepends on that indicator. In other case, it means UEdoes not support F-DPCH. When the switch is ON, if theinformation element that indicates the F-DPCH capabilityof UE exists in the message "RRC_CONNECT_REQ" or"RRC_CONNECT_SETUP_CMP", the F-DPCH capabilitydepends on that indicator. If that information elementdoes not exist, UE supports F-DPCH when all theconditions meets: a) the version of UE is Release 6. b)UE supports HS-PDSCH.

10) CMP_UU_IGNORE_UE_RLC_CAP_SWITCH: Whenthe switch is on, the RAB assignment request and thesubsequent RB setup procedure proceed if the RLC AMcapabilities of the UE fail to meet the minimum RLCTX/RX window buffer requirement of the RAB to be setup.When the switch is not on, the RAB assignment requestis rejected.

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11)CMP_UU_INTRA_FREQ_MC_BESTCELL_CIO_SWITCH:When this switch is on, the cell individual offset (CIO) ofthe best cell is always set to 0 in the INTRA-FREQUENCYMEASUREMENT CONTROL messages. Otherwise, theCIO information of the best cell is not carried in theINTRA-FREQUENCY MEASUREMENT CONTROLmessages.

12)CMP_UU_IOS_CELL_SYNC_INFO_REPORT_SWITCH:When the switch is on, the cell synchronizationinformation traced by the IOS need to be reported duringthe RRC measurement period.

13) CMP_UU_SERV_CELL_CHG_WITH_ASU_SWITCH:When the switch is on, the active set update is in thesame procedure as the change of the serving cell. Whenthe switch is not on, the serving cell is changed after theUE updates the active set and delivers reconfiguration ofphysical channels. This switch is applicable only to R6 oraboveUEs.

14)CMP_UU_SERV_CELL_CHG_WITH_RB_MOD_SWITCH:When the switch is on, channel transition is in the sameprocedure as the change of the serving cell. When theswitch is not on, the serving cell is changed after the UEperforms channel transition and delivers reconfigurationof physical channels.

15)CMP_UU_VOIP_UP_PROC_AS_NORMAL_PS_SWITCH:By default, the switch is on. In this case, the AlternativeE-bit is not configured for L2.

16) CMP_F2F_RLC_ONESIDE_REBUILD_SWITCH:When the switch is set to ON, only uplink RLC ordownlink RLC can be re-established during the statetransition from CELL_FACH to CELL_FACH (F2F forshort).

17) CMP_D2F_RLC_ONESIDE_REBUILD_SWITCH:When the switch is set to ON, only uplink RLC ordownlink RLC can be re-established during the statetransition from CELL_DCH to CELL_FACH (D2F forshort).

18) CMP_RAB_5_CFG_ROHC_SWITCH: When theswitch is set to ON, the service with RAB ID 5 can beconfigured with the Robust Header Compression (ROHC)function. When the switch is set to OFF, the service withRAB ID 5 cannot be configured with the ROHC function.

19) CMP_RAB_6_CFG_ROHC_SWITCH: When theswitch is set to ON, the service with RAB ID 6 can beconfigured with the ROHC function. When the switch isset to OFF, the service with RAB ID 6 cannot beconfigured with the ROHC function.

20) CMP_RAB_7_CFG_ROHC_SWITCH: When theswitch is set to ON, the service with RAB ID 7 can beconfigured with the ROHC function. When the switch isset to OFF, the service with RAB ID 7 cannot beconfigured with the ROHC function.

21) CMP_RAB_8_CFG_ROHC_SWITCH: When theswitch is set to ON, the service with RAB ID 8 can beconfigured with the ROHC function. When the switch isset to OFF, the service with RAB ID 8 cannot beconfigured with the ROHC function.

22) CMP_RAB_9_CFG_ROHC_SWITCH: When theswitch is set to ON, the service with RAB ID 9 can beconfigured with the ROHC function. When the switch isset to OFF, the service with RAB ID 9 cannot beconfigured with the ROHC function.

23) CMP_HSUPA_MACD_FLOW_MUL_SWITCH: Whenthe switch is set to ON, MAC-d flow can be multiplexedwithout any restrictions. When the switch is set to OFF,only MAC-d flows whose scheduling priority is lower thanthat of the current MAC-d flow can be multiplexed.

24) CMP_SMLC_RSLT_MODE_TYPE_SWITCH: If the

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Client Type of a positioning request is Value AddedService or Lawful Intercept Client, the positioning result isreported by using the Ellipsoid Arc type. For other clienttypes, the positioning result is reported by using theEllipsoid point with uncertainty circle type.

GUI Value Range:CMP_IU_IMS_PROC_AS_NORMAL_PS_SWITCH,CMP_IU_QOS_ASYMMETRY_IND_COMPAT_SWITCH,CMP_IU_SYSHOIN_CMP_IUUP_FIXTO1_SWITCH,CMP_IUR_H2D_FOR_LOWR5_NRNCCELL_SWITCH,CMP_IUR_SHO_DIVCTRL_SWITCH,CMP_UU_ADJACENT_FREQ_CM_SWITCH,CMP_UU_AMR_DRD_HHO_COMPAT_SWITCH,CMP_UU_AMR_SID_MUST_CFG_SWITCH,CMP_UU_FDPCH_COMPAT_SWITCH,CMP_UU_IGNORE_UE_RLC_CAP_SWITCH,CMP_UU_INTRA_FREQ_MC_BESTCELL_CIO_SWITCH,CMP_UU_IOS_CELL_SYNC_INFO_REPORT_SWITCH,CMP_UU_SERV_CELL_CHG_WITH_ASU_SWITCH,CMP_UU_SERV_CELL_CHG_WITH_RB_MOD_SWITCH,CMP_UU_VOIP_UP_PROC_AS_NORMAL_PS_SWITCH,CMP_F2F_RLC_ONESIDE_REBUILD_SWITCH,CMP_D2F_RLC_ONESIDE_REBUILD_SWITCH,CMP_RAB_5_CFG_ROHC_SWITCH,CMP_RAB_6_CFG_ROHC_SWITCH,CMP_RAB_7_CFG_ROHC_SWITCH,CMP_RAB_8_CFG_ROHC_SWITCH,CMP_RAB_9_CFG_ROHC_SWITCH,CMP_HSUPA_MACD_FLOW_MUL_SWITCH,CMP_SMLC_RSLT_MODE_TYPE_SWITCH

Actual Value Range:CMP_IU_IMS_PROC_AS_NORMAL_PS_SWITCH,CMP_IU_QOS_ASYMMETRY_IND_COMPAT_SWITCH,CMP_IU_SYSHOIN_CMP_IUUP_FIXTO1_SWITCH,CMP_IUR_H2D_FOR_LOWR5_NRNCCELL_SWITCH,CMP_IUR_SHO_DIVCTRL_SWITCH,CMP_UU_ADJACENT_FREQ_CM_SWITCH,CMP_UU_AMR_DRD_HHO_COMPAT_SWITCH,CMP_UU_AMR_SID_MUST_CFG_SWITCH,CMP_UU_FDPCH_COMPAT_SWITCH,CMP_UU_IGNORE_UE_RLC_CAP_SWITCH,CMP_UU_INTRA_FREQ_MC_BESTCELL_CIO_SWITCH,CMP_UU_IOS_CELL_SYNC_INFO_REPORT_SWITCH,CMP_UU_SERV_CELL_CHG_WITH_ASU_SWITCH,CMP_UU_SERV_CELL_CHG_WITH_RB_MOD_SWITCH,CMP_UU_VOIP_UP_PROC_AS_NORMAL_PS_SWITCH,CMP_F2F_RLC_ONESIDE_REBUILD_SWITCH,CMP_D2F_RLC_ONESIDE_REBUILD_SWITCH,CMP_RAB_5_CFG_ROHC_SWITCH,CMP_RAB_6_CFG_ROHC_SWITCH,CMP_RAB_7_CFG_ROHC_SWITCH,CMP_RAB_8_CFG_ROHC_SWITCH,CMP_RAB_9_CFG_ROHC_SWITCH,CMP_HSUPA_MACD_FLOW_MUL_SWITCH,CMP_SMLC_RSLT_MODE_TYPE_SWITCH

Default Value: None

CoexistMeasThdChoice BSC6900ADD UCELLHOCOMM(Optional)

MOD UCELLHOCOMM(Optional)

Meaning: This parameter specifies the event 2D/2Fmeasurement threshold of which measurement type(inter-frequency or inter-RAT measurements) will beused, when inter-frequency and inter-RATmeasurements coexist.

When COEXIST_MEAS_THD_CHOICE_INTERFREQ isselected, event 2D/2F measurement thresholds orientedtowards inter-frequency configuration are selected.

When COEXIST_MEAS_THD_CHOICE_INTERRAT isselected, event 2D/2F measurement thresholds orientedtowards inter-RAT configuration are selected.

The factors such as the event 2D/2F measurementthresholds for inter-frequency measurement and inter-RAT measurement, inter-frequency and inter-RAThandover decision thresholds, and current handoverpolicy should be considered during setting. For example,

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if the event 2D threshold for inter-RAT measurement ishigher than that for inter-frequency measurement, andinter-frequency neighboring cells are preferred wheninter-RAT and inter-frequency neighboring cells coexist,then COEXIST_MEAS_THD_CHOICE_INTERFREQshould be selected.

GUI Value Range:COEXIST_MEAS_THD_CHOICE_INTERFREQ(Choosingthe inter-frequency oriented parameters),COEXIST_MEAS_THD_CHOICE_INTERRAT(Choosingthe inter-RAT oriented parameters)

Actual Value Range:COEXIST_MEAS_THD_CHOICE_INTERFREQ,COEXIST_MEAS_THD_CHOICE_INTERRAT

Default Value:COEXIST_MEAS_THD_CHOICE_INTERFREQ

DLQosMcTimerLen BSC6900MOD UCELLQOSHO(Optional)

ADD UCELLQOSHO(Optional)

Meaning: Timer length for downlink QoS measurement.

This parameter controls the time lengths for the inter-frequency and inter-RAT measurement based on QoS.

After inter-frequency or inter-RAT measurement starts, ifno inter-frequency handover is performed when thistimer expires, the measurement is stopped, and thecompressed mode is deactivated, if any. If this parameteris set to 0, this indicates that the timer will not be started.

For the inter-frequency or inter-RAT measurementbased on coverage, the compressed mode can bestopped through reporting event 2F. For measurementthat is not based on coverage, event 2F is not reported,and the timer must be set but should not be set to 0.

As for the impact on network performance:

It reduces the influence of long time compressed mode tothe serving cell.

The compressed mode may be stopped ahead of time,which can cause the result that the UE fails to initiateinter-frequency or inter-RAT handover, and thus canlead to call drops.

GUI Value Range: 0~512

Actual Value Range: 0~512

Default Value: 20

DcccShoPenaltyTime BSC6900SET UINTRAFREQHO(Optional) Meaning: Length of penalty timer for SHO failure afterrate reduction in the active set. When the rate reductionin the active set is performed and the re-attempt foradding the cell to the active set is initiated, the RNCstarts the penalty timer for SHO failure if the target cellfails to join the active again. Before the timer expires, therate increase in the active set is prohibited, but ratereduction is not prohibited. Such penalty strategy isapplied in the following scenario: If a cell, for somereason, has high signal strength but heavy load, andcannot be added to the active set throughout by then.This cell may enter the SHO rate reduction evaluationprocess repeatedly, which results in rate reduction in theactive set. If the cell fails to be added to the active set,the rate in the active set may increase during theevaluation process because of the DCCC algorithm. Toavoid such rate fluctuation, the RNC uses a strategy ofrate increase penalty after the SHO failure again.

GUI Value Range: 0~255

Actual Value Range: 0~255

Default Value: 30

DivCtrlField BSC6900SET UHOCOMM(Optional) Meaning: There are two combination methods for uplinkcombination of soft handover: one is maximum ratiocombination at the NodeB Rake receiver, which gives thehighest combination gain; the other is selectivecombination at the RNC, which gives a relatively smallercombination gain. The default value of the indicationswitch is MAY, which means the NodeB decides whetherto implement maximum ratio combination according to its

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own physical conditions; when MUST is selected, theNodeB is forced to carry out maximum ratio combinationwhich is usually used in tests; when MUST_NOT isselected, the NodeB is forbidden to carry out maximumratio combination.

Consider the working status (test/normal operation) andthe propagation environment when deciding whether toimplement softer combination and to adopt which kind ofsofter combination.

GUI Value Range: MAY(NodeB chooses whethercombine at NodeB), MUST(Must combine at NodeB),MUST_NOT(Must combine at RNC)

Actual Value Range: MAY, MUST, MUST_NOT

Default Value: MAY

DlRscpQosHyst BSC6900MOD UCELLQOSHO(Optional)

ADD UCELLQOSHO(Optional)

Meaning: Frequency hysteresis of downlink RSCP QoS.

This parameter controls the used frequency thresholdsfor the inter-frequency and inter-RAT measurementbased on QoS.

In event mode, if the inter-frequency and inter-RATmeasurement events occurred for the downlink QoSreason, the used frequency threshold of the RSCPmeasurement quantity is equal to the used frequencythreshold that is configured on the OMU server incoverage measurement plus this parameter.

As for the impact on network performance:

The larger the value of the parameter is, the more easilyevent 2B, inter-frequency handover based on QoS, andevent 3A, inter-RAT handover based on QoS, can betriggered, and thus the more timely the handover to thetarget cell can be performed.

GUI Value Range: -15~15

Actual Value Range: -15~15

Default Value: 5

DlSFLimitCMInd BSC6900SET UCMCF(Optional) Meaning: Whether the CM is limited by the downlinkspreading factor (SF). Starting the compressed mode isresource consuming for the fast-moving UEs, so thisparameter is set to control whether the downlink SF ofthe current DCH channel should be considered. Whenthis parameter is set to FALSE, the enabling of CM doesnot consider the SF of the downlink DCH channel; whenthis parameter is set to TRUE, the enabling of CMconsiders the SF of the downlink DCH channel.

GUI Value Range: FALSE(Not Limited), TRUE(Limited)

Actual Value Range: FALSE, TRUE

Default Value: FALSE

DlSFTurnPoint BSC6900ADD UCELLCMCF(Optional)

MOD UCELLCMCF(Optional)

Meaning: Downlink compressed mode (CM)implementation mode selection threshold.

When the downlink spreading factor is greater than orequal to the value of this parameter, the SF/2 mode ispreferred. Otherwise, the high-layer scheduling mode ispreferred.

The SF/2 mode consumes more system resources andtherefore this mode is recommended only for low-rateusers. The high-layer scheduling mode requires variablemultiplexing positions of transport channels and isapplicable to a relatively narrow range. In addition, thisapproach affects the transmission rate of users.Therefore, this mode is recommended only when theSF/2 approach is unavailable or there are high-rateusers.

GUI Value Range: D8, D16, D32, D64, D128, D256

Actual Value Range: 8, 16, 32, 64, 128, 256

Default Value: D64

EHSPACMPermissionInd BSC6900SET UCMCF(Optional) Meaning: Whether the compressed mode (CM) cancoexist with the HSPA+ service.

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If this parameter is set to TRUE: 1. the RNC can enablethe CM for HSPA+ services. 2. The HSPA+ services canbe enabled when the CM is enabled. If this parameter isset to FALSE: 1. the CM for HSPA+ services can beenabled only after the uplink and downlink H2D (HS-DSCH to DCH) channel switch. 2. The HSPA+ servicescannot be enabled when the CM is enabled.

This switch is used for the compatibility of the HSPA+terminals that do not support CM when HSPA+ isenabled.

GUI Value Range: FALSE(Forbidden), TRUE(Permit)

Actual Value Range: FALSE, TRUE

Default Value: FALSE

HCSPrio BSC6900ADD UCELLHCS(Optional)

MOD UCELLHCS(Optional)

Meaning: HCS priority of the cell belongs to. Theparameter depends on HCS rules. For details, refer to3GPP TS 25.304.

GUI Value Range: 0~7

Actual Value Range: 0~7

Default Value: 0

HHOTRIG BSC6900ADD UNRNC(Mandatory)

MOD UNRNC(Optional)

Meaning: Indicating whether to trigger hard handovercross the Iur interface between the RNC and theneighboring RNC.

GUI Value Range: OFF, ON

Actual Value Range: OFF, ON

Default Value: None

HOCovPrio BSC6900ADD UINTERFREQNCELL(Optional)

MOD UINTERFREQNCELL(Optional)

Meaning: Priority for neighboring cell supportingcoverage-based inter-frequency handover.

The value "0" indicates that the coverage-based inter-freqency handover is not supported. The value "1"indicates that the cell is assigned with the highest priorityfor the handover. The value "3" indicates that the cell isassigned with the lowest priority for the handover. If ahigher priority is assigned to a cell, the probability forselecting the cell as the measurement object and thetarget cell for the handover increases. For example, thecell with priority 1 has more chance to select as themeasurement object and the target cell for the handoverthan the cell with priority 2.

GUI Value Range: 0~3

Actual Value Range: 0~3

Default Value: 2

HoSwitch BSC6900SETUCORRMALGOSWITCH(Optional)

Meaning: HandOver switch group.

1) HO_ALGO_HCS_SPEED_EST_SWITCH: When theswitch is on, the RNC evaluates the UE's moving speedin the HCS and initiates fast intra-layer or slow inter-layerhandover.

2) HO_ALGO_LDR_ALLOW_SHO_SWITCH: When theswitch is on, the LDR inter-frequency handover isallowed during soft handover.

3) HO_ALGO_MBMS_FLC_SWITCH: When the switch ison, the UE requires that the redirection strategy be usedfor frequency layer convergence.

4) HO_ALGO_OVERLAY_SWITCH: When the switch ison, the associated receiving and mobility algorithms ofthe overlay network are used. When the switch is not on,the associated algorithms are not used. Overlay networkis an UTRAN network covering present network, itsupports HSPA, MBMS and other new features. Tosatisfy new requirements of operator and restrictions ofpresent network, overlay network realizes operationdistribution and load sharing between new network andpresent network, also gives special handling for mobilitymanagement of network verge.

5) HO_INTER_FREQ_HARD_HO_SWITCH: When theswitch is on, the RNC is allowed to initiate inter-frequencymeasure control or the load-based inter-frequency hard

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handover upon the handover decision on inter-frequencyload.

6) HO_INTER_RAT_CS_OUT_SWITCH: When the switchis on, the RNC is allowed to initiate inter-frequencymeasure control and the CS inter-RAT hard handoverfrom the 3G network to the 2G network.

7)HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH:When the switch is on, the NACC function is supportedduring the PS inter-RAT handover from the 3G networkto the 2G network in the cell change order process.When the switch is not on, the NACC function is notsupported. When PS_3G2G_RELOCATION_SWITCH isON, this switch is useless. When the NACC function issupported, the UE skips the reading procedure as theSI/PSI of the target cell is provided after the UE accessesthe 2G cell. Thus, the delay of inter-cell handover isreduced.

8) HO_INTER_RAT_PS_3G2G_RELOCATION_SWITCH:When the switch is on, the PS inter-RAT handover fromthe 3G network to the 2G network is performed in therelocation process. When the switch is not on, the PSinter-RAT handover from the 3G network to the 2Gnetwork is performed in the cell change order process.

9) HO_INTER_RAT_PS_OUT_SWITCH: When the switchis on, the RNC is allowed to initiate inter-frequencymeasure control and the PS inter-RAT hard handoverfrom the 3G network to the 2G network.

10) HO_INTER_RAT_RNC_SERVICE_HO_SWITCH:When the switch is on, the attributes of inter-RAThandover of the services are based on the configurationof RNC parameters. When the switch is not on, theattributes are set on the basis of the CN. If no informationis provided by the CN, the attributes are then based onthe RNC parameters.

11)HO_INTRA_FREQ_DETSET_INTO_ACTSET_SWITCH:When the switch is on, the cells in the detected set fromwhich the RNC receives their valid event reports can beadded to the active set. The cells allowed to be added tothe active set must be the neighboring cells of the cells inthe active set.

12) HO_INTRA_FREQ_DETSET_RPRT_SWITCH: Whenthe switch is on, statistics on the intra-frequencymeasurement reports of the detected set are taken.

13) HO_INTRA_FREQ_HARD_HO_SWITCH: When theswitch is on, the RNC is allowed to initiate the intra-frequency hard handover.

14) HO_INTRA_FREQ_RPRT_1J_SWITCH: When theswitch is on, the event 1J is included in the delivery ofintra-frequency measurement control if the UE version isR6.

15) HO_INTRA_FREQ_SOFT_HO_SWITCH: When theswitch is on, the cells on the RNC can active the softhandover. When the RNC receives reports on the events1A, 1B, 1C, or 1D, associated addition, removal, andreplacement of handover cell of the soft handover areinitiated.

16) HO_MC_MEAS_BEYOND_UE_CAP_SWITCH: Whenthe switch is on, the neighboring cell whose frequencyband is beyond the UE's capabilities can also bedelivered in the inter-frequency measurement list.

17) HO_MC_NCELL_COMBINE_SWITCH: When theswitch is on, the neighboring cell combined algorithm isused during the delivery of the objects to be measured.When the switch is not on, the optimal cell algorithm isused.

18) HO_MC_SIGNAL_IUR_INTRA_SWITCH: When theswitch is on, intra-frequency handover is allowed overthe Iur interface if the UE has only signaling.

19) HO_MC_SIGNAL_SWITCH: When the switch is on,

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quality measurement on the active set is delivered aftersignaling setup but before service setup. If the UE is atthe cell verge or receives weak signals after accessingthe network, the RNC can trigger inter-frequency or inter-RAT handover when the UE sets up the RRC.

20) HO_MC_SNA_RESTRICTION_SWITCH: When theswitch is on, the RNC controls the UEs in the connectedstate based on the configurations on the CN. The UEscan only access and move in authorized cells.

21) HO_LTE_PS_OUT_SWITCH:This bit field is addedunder "Handover Algorithm Switch".HO_LTE_PS_OUT_SWITCH is the switch for thehandover from UMTS to LTE. The meaning of the bit fieldis as follows:

When this bit field is selected, this switch is set to ON. Inthis case, the RNC is allowed to send an LTEMEASUREMENT CONTROL message to the UE and toinitiate an inter-RAT PS handover from UMTS to LTE.When this bit field is not selected, this switch is set toOFF. In this case, the RNC is not allowed to send an LTEMEASUREMENT CONTROL message to the UE or toinitiate an inter-RAT PS handover from UMTS to LTE.

22) HO_LTE_SERVICE_PS_OUT_SWITCH :This bit fieldis added under "Handover Algorithm Switch".HO_LTE_SERVICE_PS_OUT_SWITCH is the switch forthe service-based handover from UMTS to LTE. Themeaning of the bit field is as follows:

When this bit field is selected, this switch is set to ON. Inthis case, the RNC is allowed to send an LTEMEASUREMENT CONTROL message to the UE basedon service and to initiate an inter-RAT PS service-basedhandover from UMTS to LTE. When this bit field is notselected, this switch is set to OFF. In this case, the RNCis not allowed to send an LTE MEASUREMENTCONTROL message to the UE based on service or toinitiate an inter-RAT PS service-based handover fromUMTS to LTE.

23) HO_H2G_SRVCC_SWITCH :This bit is a SingleRadio Voice Call Continuity (SRVCC) switch for the VoIPservice that is handed over to GERAN. SRVCC ensuresthe continuity of voice services that are handed overbetween the CS domain and the IP MultimediaSubsystem (IMS).

The meaning of the bit is as follows:

When it is set to "ON", it indicates that the VoIP servicecan be handed over to GERAN through SRVCCprocedure.

When it is set to "OFF", it indicates that the VoIP servicecannot be handed over to GERAN through SRVCCprocedure.

GUI Value Range:HO_ALGO_HCS_SPEED_EST_SWITCH,HO_ALGO_LDR_ALLOW_SHO_SWITCH,HO_ALGO_MBMS_FLC_SWITCH,HO_ALGO_OVERLAY_SWITCH,HO_INTER_FREQ_HARD_HO_SWITCH,HO_INTER_RAT_CS_OUT_SWITCH,HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH,HO_INTER_RAT_PS_3G2G_RELOCATION_SWITCH,HO_INTER_RAT_PS_OUT_SWITCH,HO_INTER_RAT_RNC_SERVICE_HO_SWITCH,HO_INTRA_FREQ_DETSET_INTO_ACTSET_SWITCH,HO_INTRA_FREQ_DETSET_RPRT_SWITCH,HO_INTRA_FREQ_HARD_HO_SWITCH,HO_INTRA_FREQ_RPRT_1J_SWITCH,HO_INTRA_FREQ_SOFT_HO_SWITCH,HO_MC_MEAS_BEYOND_UE_CAP_SWITCH,HO_MC_NCELL_COMBINE_SWITCH,HO_MC_SIGNAL_IUR_INTRA_SWITCH,HO_MC_SIGNAL_SWITCH,HO_MC_SNA_RESTRICTION_SWITCH,HO_LTE_PS_OUT_SWITCH,HO_LTE_SERVICE_PS_OUT_SWITCH,

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HO_H2G_SRVCC_SWITCH

Actual Value Range:HO_ALGO_HCS_SPEED_EST_SWITCH,HO_ALGO_LDR_ALLOW_SHO_SWITCH,HO_ALGO_MBMS_FLC_SWITCH,HO_ALGO_OVERLAY_SWITCH,HO_INTER_FREQ_HARD_HO_SWITCH,HO_INTER_RAT_CS_OUT_SWITCH,HO_INTER_RAT_PS_3G2G_CELLCHG_NACC_SWITCH,HO_INTER_RAT_PS_3G2G_RELOCATION_SWITCH,HO_INTER_RAT_PS_OUT_SWITCH,HO_INTER_RAT_RNC_SERVICE_HO_SWITCH,HO_INTRA_FREQ_DETSET_INTO_ACTSET_SWITCH,HO_INTRA_FREQ_DETSET_RPRT_SWITCH,HO_INTRA_FREQ_HARD_HO_SWITCH,HO_INTRA_FREQ_RPRT_1J_SWITCH,HO_INTRA_FREQ_SOFT_HO_SWITCH,HO_MC_MEAS_BEYOND_UE_CAP_SWITCH,HO_MC_NCELL_COMBINE_SWITCH,HO_MC_SIGNAL_IUR_INTRA_SWITCH,HO_MC_SIGNAL_SWITCH,HO_MC_SNA_RESTRICTION_SWITCH,HO_LTE_PS_OUT_SWITCH,HO_LTE_SERVICE_PS_OUT_SWITCH,HO_H2G_SRVCC_SWITCH

Default Value: None

HsdpaCMPermissionInd BSC6900SET UCMCF(Optional) Meaning: Whether the compressed mode (CM) cancoexist with the HSDPA service. If this parameter is set toTRUE: 1. the RNC can enable the CM for HSDPAservices. 2. The HSDPA services can be enabled whenthe CM is enabled. If this parameter is set to FALSE: 1.the CM for HSDPA services can be enabled only afterthe H2D (HS-DSCH to DCH) channel switch. 2. TheHSDPA services cannot be enabled when the CM isenabled.

This switch is used for the compatibility of the HSDPAterminals that do not support CM when HSDPA isenabled.

GUI Value Range: FALSE(Forbidden), TRUE(Permit)

Actual Value Range: FALSE, TRUE

Default Value: TRUE

HspaTimerLen BSC6900SET UHOCOMM(Optional) Meaning: HSPA serving cell change is usually triggeredby event 1D. To avoid frequent serving cell changewhich may affect the system performance, a protectiontimer TimerHSPA is needed. This timer shall be startedupon HSPA serving cell changed, i.e. the servingHSDSCH cell changed or the EDCH serving cellchanged. And no more 1D-triggered serving cell changeshall be performed until the timer expires. However, thistimer shall not restrict HSPA serving cell change toanother cell in the active set if current serving cell is tobe removed from the active set. The value 0 means thistimer shall not be started and serving cell change beinitiated immediately.

GUI Value Range: 0~1024

Actual Value Range: 0~1024

Default Value: 0

HsupaCMPermissionInd BSC6900SET UCMCF(Optional) Meaning: Whether the compressed mode (CM) cancoexist with the HSUPA service. If this parameter is set toPermit: 1. the RNC can enable the CM for HSUPAservices. 2. The HSUPA services can be enabled whenthe CM is enabled. If this parameter is set to Limited: 1.the CM for HSUPA services can be enabled only after theE2D (E-DCH to DCH) channel switch. 2. The HSUPAservices cannot be enabled when the CM is enabled. Ifthis parameter is set to BasedonUECap, the RNCdetermines whether CM can be enabled for HSUPAservices and whether HSUPA services can be enabledwhen the CM is enabled by considering the UE capability.

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This switch is used for the compatibility of the HSUPAterminals that do not support CM when HSUPA isenabled.

GUI Value Range: Limited, Permit,BasedOnUECap(Based On UE Capability)

Actual Value Range: Limited, Permit, BasedOnUECap

Default Value: BasedOnUECap

HystFor1A BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the hysteretic valuefor event 1A. The value of this parameter is associatedwith the slow fading. If this parameter is set to a greatervalue, the number of ping-pong handovers and thenumber of incorrect handovers reduce; however, thehandover may not be triggered in time. For details on thedefinition of this parameter, see 3GPP TS 25.331. Event1A, as a key event, refers to the event triggered when acell is added to the active set. To ensure that thehandover is triggered in time, the hysteresis for event 1Ashould be a little smaller than the hysteresises used forevents 1B, 1F, 1C, and 1D. If the difference between thehysteresises is too great, the ratio of soft handovers(SHOs) may be affected. In addition, filter coefficient andinterval time must be considered in setting thisparameter.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 0

HystFor1B BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the hysteretic valuefor event 1B. The value of this parameter is associatedwith the slow fading, and it can be used to reduce ping-pong handovers and incorrect handovers. For details onthe definition of this parameter, see 3GPP TS 25.331.Inaddition, filter coefficient and interval time must beconsidered in setting this parameter.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 0

HystFor1C BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the hysteretic valuefor event 1C. The value of this parameter is associatedwith the slow fading, and it can be used to reduce ping-pong handovers and incorrect handovers. For details onthe definition of this parameter, see 3GPP TS 25.331.Inaddition, filter coefficient and interval time must beconsidered in setting this parameter.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 8

HystFor1D BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the hysteretic valuefor event 1D. The value of this parameter is associatedwith the slow fading, and it can be used to reduce ping-pong handovers and incorrect handovers. For details onthe definition of this parameter, see 3GPP TS 25.331.Inaddition, filter coefficient and interval time must beconsidered in setting this parameter.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 8

HystFor1F BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the hysteretic valuefor event 1F. The value of this parameter is associatedwith the slow fading, and it can be used to reduce ping-pong handovers and incorrect handovers. For details onthe definition of this parameter, see 3GPP TS 25.331. Inaddition, filter coefficient and interval time must beconsidered in setting this parameter.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 8

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HystFor1J BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the hysteretic valuefor event 1J. The value of this parameter is associatedwith the slow fading, and it can be used to reduce ping-pong handovers and incorrect handovers. For details onthe definition of this parameter, see 3GPP TS 25.331.Inaddition, filter coefficient and interval time must beconsidered in setting this parameter.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 8

HystFor2B BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Hysteresis for triggering event 2B.

The value of this parameter is associated with the slowfading. If this parameter is set to a greater value, theability of resisting signal fluctuation improves and thenumber of ping-pong handovers decreases; however,the handover algorithm becomes slow in responding tothe signal change and thus event 2B may not betriggered in time.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 4

HystFor2D BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Hysteresis for triggering event 2D.

The value of this parameter is associated with the slowfading. If this parameter is set to a greater value, theprobability of ping-pong reporting of event 2D and event2F reduces and the number of incorrect decisions onevent 2D decreases; however, event 2D may not betriggered in time.

When "InterFreqReportMode" is set toPERIODICAL_REPORTING, the hysteresis in active setquality measurement is used to prevent the ping-pongreporting of event 2D (triggered when the estimatedquality of the frequency in use is lower than thethreshold) and event 2F (triggered when the estimatedquality of the frequency in use is higher than thethreshold). Event 2D is used to enable the compressionmode and event 2F is used to disable the compressionmode. To prevent the compression mode from beingfrequently enabled and disabled, you can set "Hystfor2D"and "Hystfor2F" to be greater than their recommendedvalues according to the statistics of the ping-pong inter-frequency handover.

To set "Hystfor2D" and "Hystfor2F", you should considerthe radio environment (with slow fading characteristics),actual handover distance, and moving speed of the UE.The value of this parameter ranges from 2 dB to 5 dB. Inaddition, filter coefficient and trigger delay must beconsidered in setting this parameter.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 4

HystFor2F BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Hysteresis for triggering event 2F.

The value of this parameter is associated with the slowfading. If this parameter is set to a greater value, theprobability of ping-pong reporting of event 2D and event2F reduces and the number of incorrect decisions onevent 2F decrease; however, event 2F may not betriggered in time.

When "InterFreqReportMode" is set toPERIODICAL_REPORTING, the hysteresis in active setquality measurement is used to prevent the ping-pongreporting of event 2D (triggered when the estimatedquality of the frequency in use is lower than thethreshold) and event 2F (triggered when the estimatedquality of the frequency in use is higher than thethreshold). Event 2D is used to enable the compressionmode and event 2F is used to disable the compression

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mode. To prevent the compression mode from beingfrequently enabled and disabled, you can set "Hystfor2D"and "Hystfor2F" to be greater than their recommendedvalues according to the statistics of the ping-pong inter-frequency handover.

To set "Hystfor2D" and "Hystfor2F", you should considerthe radio environment (with slow fading characteristics),actual handover distance, and moving speed of the UE.The value of this parameter ranges from 2 dB to 5 dB. Inaddition, filter coefficient and trigger delay must beconsidered in setting this parameter.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 4

HystForPrdInterFreq BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Hysteresis in the inter-frequency hardhandover triggered by the periodic measurement report.

This parameter is used to estimate the inter-frequencyhandover on the RNC side. If this parameter is set to agreater value, the ability of resisting signal fluctuationimproves and the number of ping-pong handoversdecreases; however, the handover algorithm becomesslow in responding to the signal change and thus thehandover may not be triggered in time.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 0

Hystfor2C BSC6900ADDUCELLINTERFREQHONCOV(Optional)

MODUCELLINTERFREQHONCOV(Optional)

Meaning: Hysteresis used for event 2C.

The value of this parameter is associated with the slowfading. If this parameter is set to a greater value, theability of resisting signal fluctuation improves and thenumber of ping-pong handovers decreases; however,the handover algorithm becomes slow in responding tothe signal change and thus event 2C may not betriggered in time.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 6

Hystfor3C BSC6900ADDUCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

Meaning: Hysteresis used for event 3C.

The value of this parameter is associated with the slowfading. If this parameter is set to a greater value, theability of resisting signal fluctuation improves and thenumber of ping-pong handovers decreases; however,the handover algorithm becomes slow in responding tothe signal change. If this parameter is set to a too largevalue, the cell of another RAT where the UE needs to behanded over to must be of good quality. Therefore, thecriterion for triggering the inter-RAT handover decision ishard to be fulfilled, and the call drop rate increases.

The emulation result shows that in a cell where theaverage moving speed of UEs is high (for example, a cellthat covers highways), this parameter can be set to asmaller value 1.5 dB, because in the cell the terrain isflat, barriers are fewer, and thus the shadow fadingvariation is small. In a cell where the average movingspeed of UEs is low, this parameter can be set to a largervalue 3.0 dB, because there are usually many tallbuildings and thus the shadow fading variation iscomparatively high.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 0

HystforInterRAT BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Hysteresis for inter-RAT periodical reporting.

This parameter is used to avoid incorrect decisionscaused by unexpected jitters of signals during inter-RAThandover decisions. HystforInterRAT and the inter-RAT

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handover decision threshold determine whether totrigger inter-RAT handovers.

If this parameter is set to a greater value, the ability ofresisting signal fluctuation improves and the number ofping-pong handovers decreases; however, the handoveralgorithm becomes slow in responding to the signalchange. If this parameter is set to a larger value, the cellof another RAT where the UE needs to be handed overto must be of good quality. Therefore, the criteria fortriggering the inter-RAT handover decision is hard to befulfilled, and the call drop rate will increase.

The emulation result shows that in a cell where theaverage moving speed of UEs is high (for example, a cellthat covers highways), this parameter can be set to asmaller value 1.5 dB, because in the cell the terrain isflat, barriers are fewer, and thus the shadow fadingvariation is small. In a cell where the average movingspeed of UEs is low, this parameter can be set to a largervalue 3.0 dB, because there are usually many tallbuildings and thus the shadow fading variation iscomparatively high.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 0

IFAntiPingpangTimerLength BSC6900SET UHOCOMM(Optional) Meaning: After the coverage based handover succeeds,to avoid the handover of the UE to another frequencydue to the following factors: overload, speed estimation,MBMS channel reselection, and QoS, frequenthandovers occur. The RNC will start the inter-frequencynon-coverage based anti-ping-pong timer and prohibitthe handover or measurement caused by the previousfactors before the timeout of the timer. The larger thisparameter, the better effect the anti-frequent handover.This, however, will affect the management policy of thecell or the quality of service felt by the users; the smallerthis parameter, the more frequent the inter-frequencyhandover.

GUI Value Range: 0~120

Actual Value Range: 0~120

Default Value: 30

InterFreqCSThd2DEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Ec/No threshold of triggering the inter-frequency measurement for CS services.

The threshold of triggering the inter-frequencymeasurement (namely, threshold of enabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When Ec/No is used as the measurement quantity for CSservices, the UE reports event 2D when the measuredEc/No value is lower than the value of this parameter.Then, the RNC sends the signaling to activate thecompression mode and start the inter-frequencymeasurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -17 dB; for the UE moving ata speed of 50 km/h, the recommended threshold is -14dB; for the UE moving at a speed of 120 km/h, therecommended threshold is -12 dB.

For the cell in which the UEs are moving at variousspeeds, set this parameter to -14 dB. The emulationresult shows that the call drop rate remains low for theUEs moving at a speed of 120 km/h when this parameteris set to -14 dB.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold of

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triggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -14

InterFreqCSThd2DRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: RSCP threshold of triggering the inter-frequency measurement for CS services.

The threshold of triggering the inter-frequencymeasurement (namely, threshold of enabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When RSCP is used as the measurement quantity for CSservices, the UE reports event 2D when the measuredRSCP value is lower than the value of this parameter.Then, the RNC sends the signaling to activate thecompression mode and start the inter-frequencymeasurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -100 dBm; for the UE movingat a speed of 50 km/h, the recommended threshold is-97 dBm; for the UE moving at a speed of 120 km/h, therecommended threshold is -93 dBm.

For the cell in which the UEs are moving at variousspeeds, set this parameter to -95 dBm. The emulationresult shows that the call drop rate remains low for theUEs moving at a speed of 120 km/h when this parameteris set to -95 dBm.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

When the signals at the entrance to an elevator or asubway change too fast to perform handover, set thisparameter to -90 dBm to enable the compression modeearlier.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -95

InterFreqCSThd2FEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Ec/No threshold of stopping the inter-frequencymeasurement for CS services.

The threshold of stopping the inter-frequencymeasurement (namely, threshold of disabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When Ec/No is used as the measurement quantity for CSservices, the UE reports event 2F when the measuredEc/No value is higher than the value of this parameter.Then, the RNC sends the signaling to disable thecompression mode and stop the inter-frequencymeasurement.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enabling

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and disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

InterFreqCSThd2FRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: RSCP threshold of stopping the inter-frequency measurement for CS services.

The threshold of stopping the inter-frequencymeasurement (namely, threshold of disabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When RSCP is used as the measurement quantity for CSservices, the UE reports event 2F when the measuredRSCP value is higher than the value of this parameter.Then, the RNC sends the signaling to disable thecompression mode and stop the inter-frequencymeasurement.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

When the signals at the entrance to an elevator or asubway change too fast to perform handover, set thisparameter to -85 dBm to enable the compression modeearlier.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

InterFreqHThd2DEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Ec/No threshold of triggering the inter-frequency measurement for HSPA services.

The threshold of triggering the inter-frequencymeasurement (namely, threshold of enabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When Ec/No is used as the measurement quantity forHSPA services, the UE reports event 2D when themeasured Ec/No value is lower than the value of thisparameter. Then, the RNC sends the signaling toactivate the compression mode and start the inter-frequency measurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -17 dB; for the UE moving ata speed of 50 km/h, the recommended threshold is -14dB; for the UE moving at a speed of 120 km/h, therecommended threshold is -12 dB.

For the cell in which the UEs are moving at variousspeeds, set this parameter to -14 dB. The emulationresult shows that the call drop rate remains low for theUEs moving at a speed of 120 km/h when this parameteris set to -14 dB.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase the

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difference between the thresholds of triggering event 2Dand event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -14

InterFreqHThd2DRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: RSCP threshold of triggering the inter-frequency measurement for HSPA services.

The threshold of triggering the inter-frequencymeasurement (namely, threshold of enabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When RSCP is used as the measurement quantity forHSPA services, the UE reports event 2D when themeasured RSCP value is lower than the value of thisparameter. Then, the RNC sends the signaling toactivate the compression mode and start the inter-frequency measurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -100 dBm; for the UE movingat a speed of 50 km/h, the recommended threshold is-97 dBm; for the UE moving at a speed of 120 km/h, therecommended threshold is -93 dBm.

For the cell in which the UEs are moving at variousspeeds, set this parameter to -95 dBm. The emulationresult shows that the call drop rate remains low for theUEs moving at a speed of 120 km/h when this parameteris set to -95 dBm.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

When the signals at the entrance to an elevator or asubway change too fast to perform handover, set thisparameter to -90 dBm to enable the compression modeearlier.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -95

InterFreqHThd2FEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Ec/No threshold of stopping the inter-frequencymeasurement for HSPA services.

The threshold of stopping the inter-frequencymeasurement (namely, threshold of disabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When Ec/No is used as the measurement quantity forHSPA services, the UE reports event 2F when themeasured Ec/No value is higher than the value of thisparameter. Then, the RNC sends the signaling to disablethe compression mode and stop the inter-frequencymeasurement.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2D

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and event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

InterFreqHThd2FRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: RSCP threshold of stopping the inter-frequency measurement for HSPA services.

The threshold of stopping the inter-frequencymeasurement (namely, threshold of disabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When RSCP is used as the measurement quantity forHSPA services, the UE reports event 2F when themeasured RSCP value is higher than the value of thisparameter. Then, the RNC sends the signaling to disablethe compression mode and stop the inter-frequencymeasurement.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

When the signals at the entrance to an elevator or asubway change too fast to perform handover, set thisparameter to -85 dBm to enable the compression modeearlier.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

InterFreqLDHOMethodSelection BSC6900ADD UCELLLDR(Optional)

MOD UCELLLDR(Optional)

Meaning: This parameter specifies load handovermethod.When network is composed of same frequencyband,Blind Handover method is suggested.Otherwise,Measure handover is suggested .

GUI Value Range: BLINDHO(BLINDHO),MEASUREHO(MEASUREHO)

Actual Value Range: BLINDHO, MEASUREHO

Default Value: BLINDHO

InterFreqMeasTime BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Length of the timer for the inter-frequencymeasurement.

If the inter-frequency handover is not performed beforethis timer expires, the inter-frequency measurement isstopped and the compression mode is disabled (ifenabled before). The value 0 indicates that this timer isnot to be started.

This parameter is used to prevent the long duration ofthe inter-frequency measurement state (compressionmode) due to unavailability of a target cell that meets thehandover criteria.

GUI Value Range: 0~512

Actual Value Range: 0~512

Default Value: 60

InterFreqNCovHOThdEcN0 BSC6900SET UINTERFREQHONCOV(Optional) Meaning: Threshold of signal quality of the targetfrequency for triggering inter-frequency measurement.

This parameter is used to set measurement control onthe event 2C.

The event 2C is triggered when the signal quality of thetarget frequency is above this threshold.

GUI Value Range: -24~0

Actual Value Range: -24~0

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Default Value: -16

InterFreqR99PsThd2DEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Ec/No threshold of triggering the inter-frequency measurement for PS non-HSPA services.

The threshold of triggering the inter-frequencymeasurement (namely, threshold of enabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When Ec/No is used as the measurement quantity for PSnon-HSPA services, the UE reports event 2D when themeasured Ec/No value is lower than the value of thisparameter. Then, the RNC sends the signaling toactivate the compression mode and start the inter-frequency measurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -17 dB; for the UE moving ata speed of 50 km/h, the recommended threshold is -14dB; for the UE moving at a speed of 120 km/h, therecommended threshold is -12 dB.

For the cell in which the UEs are moving at variousspeeds, set this parameter to -14 dB. The emulationresult shows that the call drop rate remains low for theUEs moving at a speed of 120 km/h when this parameteris set to -14 dB.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -14

InterFreqR99PsThd2DRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: RSCP threshold of triggering the inter-frequency measurement for PS non-HSPA services.

The threshold of triggering the inter-frequencymeasurement (namely, threshold of enabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When RSCP is used as the measurement quantity forHSPA services, the UE reports event 2D when themeasured RSCP value is lower than the value of thisparameter. Then, the RNC sends the signaling toactivate the compression mode and start the inter-frequency measurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -100 dBm; for the UE movingat a speed of 50 km/h, the recommended threshold is-97 dBm; for the UE moving at a speed of 120 km/h, therecommended threshold is -93 dBm.

For the cell in which the UEs are moving at variousspeeds, set this parameter to -95 dBm. The emulationresult shows that the call drop rate remains low for theUEs moving at a speed of 120 km/h when this parameteris set to -95 dBm.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase the

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difference between the thresholds of triggering event 2Dand event 2F.

When the signals at the entrance to an elevator or asubway change too fast to perform handover, set thisparameter to -90 dBm to enable the compression modeearlier.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -95

InterFreqR99PsThd2FEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Ec/No threshold of stopping the inter-frequencymeasurement for PS non-HSPA services.

The threshold of stopping the inter-frequencymeasurement (namely, threshold of disabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When Ec/No is used as the measurement quantity for PSnon-HSPA services, the UE reports event 2F when themeasured Ec/No value is higher than the value of thisparameter. Then, the RNC sends the signaling to disablethe compression mode and stop the inter-frequencymeasurement.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

InterFreqR99PsThd2FRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: RSCP threshold of stopping the inter-frequency measurement for PS non-HSPA services.

The threshold of stopping the inter-frequencymeasurement (namely, threshold of disabling thecompression mode) is a key parameter in the inter-frequency handover policy. The setting of this parameteraffects the proportion of the UEs in compression mode ina cell and the success rate of the hard handover. To setthis parameter, consider the following factors: movingspeed of the UE and cell radius.

When RSCP is used as the measurement quantity for PSnon-HSPA services, the UE reports event 2F when themeasured RSCP value is higher than the value of thisparameter. Then, the RNC sends the signaling to disablethe compression mode and stop the inter-frequencymeasurement.

Event 2D and event 2F are used to enable and disablethe compression mode respectively. To enable thecompression mode earlier, increase the threshold oftriggering event 2D; otherwise, decrease the threshold oftriggering event 2D. To prevent the frequent enablingand disabling of the compression mode, increase thedifference between the thresholds of triggering event 2Dand event 2F.

When the signals at the entrance to an elevator or asubway change too fast to perform handover, set thisparameter to -85 dBm to enable the compression modeearlier.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

InterFreqRATSwitch BSC6900ADD UCELLHOCOMM(Optional) Meaning: Cell-level switch for controlling inter-frequency

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MOD UCELLHOCOMM(Optional) and inter-RAT handover.

When inter-frequency and inter-RAT cells coexist, theparameter should be configured according to actualhandover policies.

When INTERFREQ is selected, only inter-frequencyneighboring cells are measured and inter-frequencyhandover is performed.

When INTERRAT is selected, only GSM neighboring cellsare measured and inter-RAT handover is performed.

When SIMINTERFREQRAT is selected, both inter-frequency and inter-RAT cells are measured, and thehandover is performed according to the type of the cellthat first meets the handover decision criteria.

GUI Value Range: INTERFREQ(inter-frequencyhandover only), INTERRAT(inter-RAT handover only),SIMINTERFREQRAT(inter-frequency and inter-RAThandover)

Actual Value Range: INTERFREQ, INTERRAT,SIMINTERFREQRAT

Default Value: SIMINTERFREQRAT

InterFreqReportMode BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Cell-oriented inter-frequency measurementreport mode

If this parameter is set to PERIODICAL_REPORTING,measurement reports are periodically reported. If thisparameter is set to EVENT_TRIGGER, measurementreports are reported by triggering the event.

There are two inter-frequency handover report modes inthe RNC, namely, event-triggered report and periodicalreport. The report mode is selected by setting the inter-frequency report mode switch that is RNC-oriented.

Event-triggered report mode

In this mode, event 2B is used to decide whether totrigger inter-frequency handover. This prevents the ping-pong handover (The quality of the currently usedfrequency is lower than the absolute threshold "usedfrequency quality threshold", and the quality of theunused frequency is higher than another absolutethreshold "target frequency trigger threshold"). Event 2Bcannot change from event-triggered mode to periodicalmode. When event-triggered measurement report modeis selected, Ec/No and RSCP are both used as themeasurement quantity for inter-frequencymeasurement.The advantage of event-triggered reportmode is that the signaling transmission and processingload are saved. Comparing the signal quality betweenintra-frequency and inter-frequency handovers, the ping-pong effect in handover is prevented to some extent.The disadvantage of event-triggered report mode is thatthe event is reported only once and cannot be changedto periodical mode. For the cell-oriented algorithmparameters, each time when the best cell is updated, theinter-frequency measurement parameters should beupdated accordingly.

Periodical report mode

In this mode, event 2D/2F is used to start and stop thecompressed mode, and to periodically report the inter-frequency cell measurement result in compressed mode.When the cell quality reported by the UE is higher thanthe absolute threshold plus hysteresis, the triggeringdelay timer is started. If the conditions are always metbefore the timer expires, the inter-frequency handover isstarted after the timer expires.

If the handover fails, the handover decision is performed,according to the periodical inter-frequency measurementreport.

The advantage of the periodical measurement reportmode is that it can repeatedly perform direct retry on thesame cell when the handover fails, and that the followingalgorithms can be flexibly developed. For the cell-

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oriented algorithm parameters, the UE need not beinformed through signaling but the cell need be updatedonly when the handover decision is performed in theRNC. The disadvantage of the periodical measurementreport mode is that it requires large amount of signalingand increases the load on the air interface and forsignaling processing.

As for the impact on network performance,the twomeasurement report modes have both advantages anddisadvantages. Currently, the traditional periodical reportmode is preferred.

GUI Value Range: PERIODICAL_REPORTING(Periodicalreporting), EVENT_TRIGGER(Event trigger)

Actual Value Range: PERIODICAL_REPORTING,EVENT_TRIGGER

Default Value: PERIODICAL_REPORTING

InterRATCSThd2DEcN0 BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of triggering inter-RATmeasurement for CS services when measurementquantity is Ec/No.

The threshold of triggering the inter-RAT measurement(the threshold of enabling the compressed mode) is akey parameter in the inter-RAT handover policy. Thesetting of this parameter affects the proportion of theUEs in compressed mode in a cell and the success rateof the hard handover. The setting of this parametershould consider two factors, moving speed of the UE andcell radius.

When Ec/No is used as the measurement quantity for CSservices, the UE reports event 2D when the measuredEc/No value is lower than this threshold. Then, the RNCsends the signaling to enable the compressed mode andstart inter-RAT measurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -17 dB; for the UE moving ata speed of 50 km/h, the recommended threshold is -14dB; for the UE moving at a speed of 120 km/h, therecommended threshold is -12 dB. In actual networks,set this parameter to -14 dB because the UEs in a cellusually move at different speeds. The emulation resultshows that the call drop rate remains low for the UEsmoving at a speed of 120 km/h when this parameter isset to -14 dB.

If the cell is a macro cell, it indicates that micro cells existin this cell. To enable the micro cells to handle moretraffic, the compressed mode start and stop thresholdsshould be set higher, that is, the thresholds for events2D and 2F using CPICH RSCP are set higher.

If the cell is a micro cell, the default value should bemodified according to the link budgeting result.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively. When the cell islocated in the center of the frequency coverage or theinter-frequency measurement quantity uses both Ec/Noand RSCP, then the Ec/No value is used as the criterionfor events 2D and 2F. To enable the compressed modeearlier, increase the threshold of triggering event 2D;otherwise, decrease the threshold of triggering event 2D.To prevent the frequent enabling and disabling of thecompressed mode, increase the difference between thethresholds of triggering event 2D and event 2F.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively in inter-RATmeasurement. The requirements on the signal qualityand inter-RAT handover policies vary with the servicetype. Therefore, the thresholds of enabling and disablinginter-RAT measurement are distinguished by CS, PS,and signaling.

To enable the compressed mode earlier, increase thethreshold of triggering event 2D; otherwise, decrease thethreshold of triggering event 2D. To prevent the frequentenabling and disabling of the compressed mode,

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increase the difference between the thresholds oftriggering event 2D and event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -14

InterRATCSThd2DRSCP BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of triggering inter-RATmeasurement for CS services when measurementquantity is RSCP.

When RSCP is used as the measurement quantity for CSservices, the UE reports event 2D when the measuredRSCP value is lower than this threshold. Then, the RNCsends the signaling to enable the compressed mode andstart the inter-RAT measurement.

To enable the compressed mode earlier, increase thethreshold of triggering event 2D; otherwise, decrease thethreshold of triggering event 2D. To prevent the frequentenabling and disabling of the compressed mode,increase the difference between the thresholds oftriggering event 2D and event 2F.

In most cases, users want to be maintained within a 3Gnetwork. Therefore, the start threshold of the inter-RATmeasurement is set smaller than that of the inter-frequency measurement in order to trigger inter-frequency easily. In scenarios where inter-frequencyneighboring cells are unavailable or where inter-frequency coverage is insufficient, the inter-RATmeasurement start threshold should be set relativelylarger in order to trigger inter-RAT measurement easily,thus reducing call drops.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -100

InterRATCSThd2FEcN0 BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of stopping inter-RAT measurementfor CS services when measurement quantity is Ec/No.

The threshold of stopping the inter-RAT measurement(the threshold of disabling the compressed mode) is akey parameter in the inter-RAT handover policy. Thesetting of this parameter affects the proportion of theUEs in compressed mode in a cell and the success rateof the hard handover. The setting of this parametershould consider two factors, moving speed of the UE andcell radius.

When Ec/No is used as the measurement quantity for CSservices, the UE reports event 2F when the measuredEc/No value is higher than the value of this parameter.Then, the RNC sends the signaling to disable thecompressed mode and stop the inter-frequencymeasurement.

If the cell is a macro cell, it indicates that micro cells existin this cell. To enable the micro cells to handle moretraffic, the compressed mode start and stop thresholdsshould be set higher, that is, the thresholds for events2D and 2F using CPICH RSCP are set higher.

If the cell is a micro cell, the default value should bemodified according to the link budgeting result.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively. When the cell islocated in the center of the frequency coverage or theinter-frequency measurement quantity uses both Ec/Noand RSCP, then the Ec/No value is used as the criterionfor events 2D and 2F. To enable the compressed modeearlier, increase the threshold of triggering event 2D;otherwise, decrease the threshold of triggering event 2D.To prevent the frequent enabling and disabling of thecompressed mode, increase the difference between thethresholds of triggering event 2D and event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

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Default Value: -12

InterRATCSThd2FRSCP BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of stopping inter-RAT measurementfor CS services when measurement quantity is RSCP.

When RSCP is used as the measurement quantity for CSservices, the UE reports event 2F when the measuredRSCP value is larger than this threshold. Then, the RNCsends the signaling to disable the compressed mode andstop the inter-RAT measurement.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -97

InterRATHOAttempts BSC6900ADDUCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

Meaning: Maximum number of inter-RAT handoverattempts after the non-coverage-based handoverfailures. For each handover attempt, a new target cellwhere the UE has not been handed over to and fulfillsthe criterion can be selected.

GUI Value Range: 1~16

Actual Value Range: 1~16

Default Value: 16

InterRATHThd2DEcN0 BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of triggering inter-RATmeasurement for HSPA services when measurementquantity is Ec/No.

The threshold of triggering the inter-RAT measurement(the threshold of enabling the compressed mode) is akey parameter in the inter-RAT handover policy. Thesetting of this parameter affects the proportion of theUEs in compressed mode in a cell and the success rateof the hard handover. The setting of this parametershould consider two factors, moving speed of the UE andcell radius.

When Ec/No is used as the measurement quantity forHSPA services, the UE reports event 2D when themeasured Ec/No value is lower than this threshold. Then,the RNC sends the signaling to enable the compressedmode and start inter-RAT measurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -17 dB; for the UE moving ata speed of 50 km/h, the recommended threshold is -14dB; for the UE moving at a speed of 120 km/h, therecommended threshold is -12 dB.

In actual networks, set this parameter to -14 dB becausethe UEs in a cell usually move at different speeds. Theemulation result shows that the call drop rate remains lowfor the UEs moving at a speed of 120 km/h when thisparameter is set to -14 dB.

If the cell is a macro cell, it indicates that micro cells existin this cell. To enable the micro cells to handle moretraffic, the compressed mode start and stop thresholdsshould be set higher, that is, the thresholds for events2D and 2F using CPICH RSCP are set higher.

If the cell is a micro cell, the default value should bemodified according to the link budgeting result.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively. When the cell islocated in the center of the frequency coverage or theinter-frequency measurement quantity uses both Ec/Noand RSCP, then the Ec/No value is used as the criterionfor events 2D and 2F. To enable the compressed modeearlier, increase the threshold of triggering event 2D;otherwise, decrease the threshold of triggering event 2D.To prevent the frequent enabling and disabling of thecompressed mode, increase the difference between thethresholds of triggering event 2D and event 2F.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively in inter-RATmeasurement. The requirements on the signal qualityand inter-RAT handover policies vary with the servicetype. Therefore, the thresholds of enabling and disablinginter-RAT measurement are distinguished by CS, PS,

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and signaling.

To enable the compressed mode earlier, increase thethreshold of triggering event 2D; otherwise, decrease thethreshold of triggering event 2D. To prevent the frequentenabling and disabling of the compressed mode,increase the difference between the thresholds oftriggering event 2D and event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -15

InterRATHThd2DRSCP BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of triggering inter-RATmeasurement for HSPA services when measurementquantity is RSCP.

When RSCP is used as the measurement quantity forHSPA services, the UE reports event 2D when themeasured RSCP value is lower than this threshold. Then,the RNC sends the signaling to enable the compressedmode and start the inter-RAT measurement.

To enable the compressed mode earlier, increase thethreshold of triggering event 2D; otherwise, decrease thethreshold of triggering event 2D. To prevent the frequentenabling and disabling of the compressed mode,increase the difference between the thresholds oftriggering event 2D and event 2F.

In most cases, users want to be maintained within a 3Gnetwork. Therefore, the start threshold of the inter-RATmeasurement is set smaller than that of the inter-frequency measurement in order to trigger inter-frequency easily. In scenarios where inter-frequencyneighboring cells are unavailable or where inter-frequency coverage is insufficient, the inter-RATmeasurement start threshold should be set relativelylarger in order to trigger inter-RAT measurement easily,thus reducing call drops.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -110

InterRATHThd2FEcN0 BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of stopping inter-RAT measurementfor HSPA services when measurement quantity is Ec/No.

The threshold of stopping the inter-RAT measurement(the threshold of disabling the compressed mode) is akey parameter in the inter-RAT handover policy. Thesetting of this parameter affects the proportion of theUEs in compressed mode in a cell and the success rateof the hard handover. The setting of this parametershould consider two factors, moving speed of the UE andcell radius.

When Ec/No is used as the measurement quantity forHSPA services, the UE reports event 2F when themeasured Ec/No value is higher than the value of thisparameter. Then, the RNC sends the signaling to disablethe compression mode and stop the inter-frequencymeasurement.

If the cell is a macro cell, it indicates that micro cells existin this cell. To enable the micro cells to handle moretraffic, the compressed mode start and stop thresholdsshould be set higher, that is, the thresholds for events2D and 2F using CPICH RSCP are set higher.

If the cell is a micro cell, the default value should bemodified according to the link budgeting result.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively. When the cell islocated in the center of the frequency coverage or theinter-frequency measurement quantity uses both Ec/Noand RSCP, then the Ec/No value is used as the criterionfor events 2D and 2F. To enable the compressed modeearlier, increase the threshold of triggering event 2D;otherwise, decrease the threshold of triggering event 2D.

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To prevent the frequent enabling and disabling of thecompressed mode, increase the difference between thethresholds of triggering event 2D and event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -13

InterRATHThd2FRSCP BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of stopping inter-RAT measurementfor HSPA services when measurement quantity is RSCP.

When RSCP is used as the measurement quantity forHSPA services, the UE reports event 2F when themeasured RSCP value is larger than this threshold.Then, the RNC sends the signaling to disable thecompressed mode and stop the inter-RAT measurement.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -107

InterRATMeasTime BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Length of the timer for inter-RATmeasurement.

After inter-RAT measurement starts, if no inter-RAThandover is performed when this timer expires, the inter-RAT measurement is stopped. In addition, thecompressed mode (if activated) should be deactivated.The value 0 indicates that the inter-RAT measurementtimer is not started.

The following factors should be considered duringsetting:

This parameter is designed to prevent that the UE beingin compressed mode for a long time when the handovercriteria are not fulfilled, because the UE does not moveor is moving in a low speed. If the compressed mode ismaintained for a long time, the service quality isadversely affected and the total available capacity of thesystem decreases.

Most inter-RAT handovers can be finished within 60s.

Impact on network performance:

If the parameter is set to a smaller value, the UE cannotfinish inter-RAT handover. If the parameter is set to alarger value, the compressed mode will not be disabled,thus affecting UE measurement. In actual networks,statistics can be made to obtain the delay for asuccessful inter-RAT handover, thus to get a propervalue of "InterRATMeasTime" that satisfies most UEs.

GUI Value Range: 0~512

Actual Value Range: 0~512

Default Value: 60

InterRATNCovHOPSThd BSC6900ADDUCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

Meaning: Quality requirement for the cell of another RATduring inter-RAT handover for CS domain services.

This parameter is used for measurement control onevent 3C. When the target frequency quality is higherthan this threshold, event 3C is triggered. The value 0means a value smaller than -110 dBm.

If the value of "Inter-RAT Report Mode" is set to"PERIODICAL_REPORTING", this parameter is used forthe assessment of inter-RAT coverage handover. Thatis, Tother_RAT in the following formulas. This parameteris the absolute threshold of the cell of another RAT(Received Signal Strength Indicator: RSSI) for the inter-RAT handover decision.

If the quality of the cell of another RAT in the inter-RATmeasurement report fulfills the following criterion:

Mother_RAT + CIO >= Tother_RAT + H/2

Then, the system starts the trigger timer, and makes thehandover decision after the timer expires. If the quality ofthe cell of another RAT fulfills the following criterionbefore timeout:

Mother_RAT + CIO < Tother_RAT - H/2

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The RNC stops the timer and waits for another inter-RATmeasurement report.

Here,

Mother_RAT is the measurement result of the GSMRSSI.

Tother_RAT is the inter-RAT handover decisionthreshold.

Cell Individual Offset (CIO) is the offset for the cell ofanother inter-RAT.

H represents the hysteresis, the setting of which canreduce wrong decisions caused by signal jitters.

The sensitivity of a GSM mobile phone is -102 dBm.Considering a margin of 3 dB for compensation of fastfading, 5 dB for compensation of slow fading, 2 dB forcompensation of interference noise, and 2 dB forcompensation of ambient noise, the outdoor receptionlevel should not be lower than -90 dBm.

The parameter value can vary with the handover policy.To have UEs handed over only to GSM cells of highquality, the inter-RAT handover decision threshold canbe set to a comparatively large value, for example -85dBm.

GUI Value Range: 0~63

Actual Value Range: lower than -110, -110~-48(Actualvalue meets the condition: Actual Value = GUI Value -111)

Default Value: 21

InterRATPeriodReportInterval BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Interval that the UE reports inter-RATmeasurement results to the RNC.

This parameter specifies the interval that the UE sendsinter-RAT measurement results to the RNC in periodicalreporting mode. It is not recommended that thisparameter is set to NON_PERIODIC_REPORT since theUE behavior may be unknown.

The GSM RSSI measurement period is 480 ms.Therefore, the inter-RAT periodical reporting intervalshould be longer than 480 ms. If the periodical reportinginterval is excessively high, the handover decision timewill be long, and handovers will be slow.

The adjustment should be made according to theconfigured GSM RSSI measurement compressed modesequence. According to the current configured GSMRSSI measurement compressed mode sequence, theRSSI measurement of eight GSM cells can be finished in480 ms. Therefore, the RSSI measurement of 16 GSMcells can be finished in 1000 ms. According to 3GPPspecifications, the number of inter-RAT neighboring cellsshould not exceed 32. Therefore, the parameter valuecan be set to 2000 ms if the number of neighboring GSMcells exceeds 16.

The setting of this parameter has impact on the Uusignaling traffic. If the period is too short and thereporting frequency is too high, the RNC may have highload in processing signaling. If the period is too long, thenetwork cannot detect the signal changes in time, whichmay delay the inter-RAT handover and thus cause calldrops.

GUI Value Range: NON_PERIODIC_REPORT(Nonperiodical reporting), D250(D250), D500(D500),D1000(D1000), D2000(D2000), D3000(D3000),D4000(D4000), D6000(D6000), D8000(D8000),D12000(D12000), D16000(D16000), D20000(D20000),D24000(D24000), D28000(D28000), D32000(D32000),D64000(D64000)

Actual Value Range: NON_PERIODIC_REPORT, 250,500, 1000, 2000, 3000, 4000, 6000, 8000, 12000,16000, 20000, 24000, 28000, 32000, 64000

Default Value: D1000

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InterRATPingPongHyst BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Hysteresis to avoid ping-pong handoverbetween 2G and 3G networks.

When a UE in the CS domain is handed over from a 2Gnetwork to a 3G network, the system increases thehysteresis used for event 3A to prevent the ping-ponghandover between the 2G network and the 3G network inthe handover penalty period specified by"InterRATPingPongTimer". During the penalty time,event-triggered reporting is used for inter-RATmeasurement. The value 0 indicates that the systemdoes not take measures to avoid ping-pong handoverbetween 2G and 3G networks.

GUI Value Range: 0~15

Actual Value Range: 0~7.5

Default Value: 0

InterRATPingPongTimer BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Length of the timer to avoid ping-ponghandovers between 2G and 3G networks.

When a UE in the CS domain is handed over from a 2Gnetwork to a 3G network, the system increases thehysteresis used for event 3A to prevent the ping-ponghandover between the 2G network and the 3G network inthe period specified by this parameter. During thepenalty time, the previous periodical report will bechanged to the event 3A report. The value 0 indicatesthat the system does not take measures to avoid ping-pong handover between 2G and 3G networks.

GUI Value Range: 0~65535

Actual Value Range: 0~65535

Default Value: 0

InterRATR99PsThd2DEcN0 BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of triggering inter-RATmeasurement for PS domain non-HSPA services whenthe measurement quantity is Ec/No.

The threshold of triggering the inter-RAT measurement(the threshold of enabling the compressed mode) is akey parameter in the inter-RAT handover policy. Thesetting of this parameter affects the proportion of theUEs in compressed mode in a cell and the success rateof the hard handover. The setting of this parametershould consider two factors, moving speed of the UE andcell radius.

When Ec/No is used as the measurement quantity for PSdomain non-HSPA services, the UE reports event 2Dwhen the measured Ec/No value is lower than thisthreshold. Then, the RNC sends the signaling to enablethe compressed mode and start inter-RAT measurement.

For the UE moving at a speed of 5 km/h, therecommended threshold is -17 dB; for the UE moving ata speed of 50 km/h, the recommended threshold is -14dB; for the UE moving at a speed of 120 km/h, therecommended threshold is -12 dB.

In actual networks, set this parameter to -14 dB becausethe UEs in a cell usually move at different speeds. Theemulation result shows that the call drop rate remains lowfor the UEs moving at a speed of 120 km/h when thisparameter is set to -14 dB.

If the cell is a macro cell, it indicates that micro cells existin this cell. To enable the micro cells to handle moretraffic, the compressed mode start and stop thresholdsshould be set higher, that is, the thresholds for events2D and 2F using CPICH RSCP are set higher.

If the cell is a micro cell, the default value should bemodified according to the link budgeting result.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively. When the cell islocated in the center of the frequency coverage or theinter-frequency measurement quantity uses both Ec/Noand RSCP, then the Ec/No value is used as the criterionfor events 2D and 2F. To enable the compressed modeearlier, increase the threshold of triggering event 2D;

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otherwise, decrease the threshold of triggering event 2D.To prevent the frequent enabling and disabling of thecompressed mode, increase the difference between thethresholds of triggering event 2D and event 2F.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively in inter-RATmeasurement. The requirements on the signal qualityand inter-RAT handover policies vary with the servicetype. Therefore, the thresholds of enabling and disablinginter-RAT measurement are distinguished by CS, PS,and signaling.

To enable the compressed mode earlier, increase thethreshold of triggering event 2D; otherwise, decrease thethreshold of triggering event 2D. To prevent the frequentenabling and disabling of the compressed mode,increase the difference between the thresholds oftriggering event 2D and event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -15

InterRATR99PsThd2DRSCP BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of triggering inter-RATmeasurement for PS domain non-HSPA services whenthe measurement quantity is RSCP.

When RSCP is used as the measurement quantity for PSdomain non-HSPA services, the UE reports event 2Dwhen the measured RSCP value is lower than thisthreshold. Then, the RNC sends the signaling to enablethe compressed mode and start the inter-RATmeasurement.

To enable the compressed mode earlier, increase thethreshold of triggering event 2D; otherwise, decrease thethreshold of triggering event 2D. To prevent the frequentenabling and disabling of the compressed mode,increase the difference between the thresholds oftriggering event 2D and event 2F.

In most cases, users want to be maintained within a 3Gnetwork. Therefore, the start threshold of the inter-RATmeasurement is set smaller than that of the inter-frequency measurement in order to trigger inter-frequency easily. In scenarios where inter-frequencyneighboring cells are unavailable or where inter-frequency coverage is insufficient, the inter-RATmeasurement start threshold should be set relativelylarger in order to trigger inter-RAT measurement easily,thus reducing call drops.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -110

InterRATR99PsThd2FEcN0 BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of triggering inter-RATmeasurement for PS domain non-HSPA services whenthe measurement quantity is Ec/No.

The threshold of stopping the inter-RAT measurement(the threshold of disabling the compressed mode) is akey parameter in the inter-RAT handover policy. Thesetting of this parameter affects the proportion of theUEs in compressed mode in a cell and the success rateof the hard handover. The setting of this parametershould consider two factors, moving speed of the UE andcell radius.

When Ec/No is used as the measurement quantity for PSdomain HSPA services, the UE reports event 2F whenthe measured Ec/No value is higher than this threshold.Then, the RNC sends the signaling to disable thecompressed mode and stop the inter-frequencymeasurement.

If the cell is a macro cell, it indicates that micro cells existin this cell. To enable the micro cells to handle moretraffic, the compressed mode start and stop thresholdsshould be set higher, that is, the thresholds for events

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2D and 2F using CPICH RSCP are set higher.

If the cell is a micro cell, the default value should bemodified according to the link budgeting result.

Event 2D and event 2F are used to enable and disablethe compressed mode respectively. When the cell islocated in the center of the frequency coverage or theinter-frequency measurement quantity uses both Ec/Noand RSCP, then the Ec/No value is used as the criterionfor events 2D and 2F. To enable the compressed modeearlier, increase the threshold of triggering event 2D;otherwise, decrease the threshold of triggering event 2D.To prevent the frequent enabling and disabling of thecompressed mode, increase the difference between thethresholds of triggering event 2D and event 2F.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -13

InterRATR99PsThd2FRSCP BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Threshold of stopping inter-RAT measurementfor PS domain non-HSPA services when themeasurement quantity is RSCP.

When RSCP is used as the measurement quantity for PSdomain non-HSPA services, the UE reports event 2Fwhen the measured RSCP value is larger than thisthreshold. Then, the RNC sends the signaling to disablethe compressed mode and stop the inter-RATmeasurement.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -107

InterRatReportMode BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Inter-RAT measurement reporting mode.

When PERIODICAL_REPORTING is selected, theperiodical reporting is used for inter-RAT measurement.When EVENT_TRIGGER is selected, the event-triggeredreporting is used for inter-RAT measurement.

The RNC provides two inter-RAT measurement reportingmodes, event-triggered reporting and periodicalreporting.

Event-triggered reporting

To avoid the ping-pong effect before and after the inter-RAT handover, use event 3A (quality of the currentlyused frequency is lower than the absolute threshold andthe signal level of the GSM cell is higher than anotherabsolute threshold) as the triggering event thatdetermines the inter-RAT handover. To improve thehandover success rate, the BSIC of the GSM cell whoseevent 3A needs to be triggered must be decodedcorrectly by the UE. The reporting mode of event 3A isnot changed from event-triggered reporting to periodicalreporting. Therefore, no handover re-attempt is madewhen the handover fails unless event 3A is triggered inthis cell again.

The advantage of event-triggered reporting is that thesignaling transmission and processing load are saved.Comparing the signal quality between intra-frequencyand inter-frequency handovers, the ping-pong effect inhandover is prevented to some extent. The drawback ofevent-triggered reporting is that the event is reportedonly once and cannot be changed to periodicalreporting. For the cell-oriented algorithm parameters,each time when the best cell is updated, the inter-frequency measurement parameters should be updatedaccordingly.

Periodical reporting

When the quality of the GSM cell reported by the UEmeets the criteria for inter-RAT handover, the delaytrigger timer is started. If the quality of the GSM cellalways meets the criteria for inter-RAT handover beforetimeout, the inter-RAT handover is triggered after thedelay trigger timer expires.

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For the GSM cell whose BSIC can be decoded correctly,a shorter delay trigger time should be set to indicate thehigh priority attribute of the GSM cell. For the GSM cellwhose BSIC is not verified, a longer delay trigger timeshould be set to indicate the low priority attribute of theGSM cell. In this manner, the BSIC can be decodedfaster.

If the handover fails, the handover re-attempt is madeagain according to the periodical inter-RATmeasurement report.

The advantage of periodical reporting is that it can beused for repeated handover re-attempts on the same cellwhen the handover fails, and that subsequent algorithmscan be flexibly developed. In addition, for the cell-oriented algorithm parameters, the RNC updates theparameters when making internal handover decision andthe system needs not to inform the UEs of the parameterchange through signaling messages after the handovers.The drawback of periodical reporting is that it requireslarge amount of signaling and increases the load on theair interface and for signaling processing.

The two reporting modes have both advantage anddrawback. Currently, the traditional periodical reportingmode is preferred.

GUI Value Range: PERIODICAL_REPORTING(Periodicalreporting), EVENT_TRIGGER(Event trigger)

Actual Value Range: PERIODICAL_REPORTING,EVENT_TRIGGER

Default Value: PERIODICAL_REPORTING

IntraAblThdFor1FEcNo BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Ec/No absolute threshold for event 1F in theSHO algorithm. This parameter must be set to the valuethat guarantees the quality of basic services. In addition,the value of this parameter affects event 1F triggering.

Event 1F refers to the event reported when an urgentblind handover is triggered. If event 1F is reported in acell belonging to the active set, the signal quality of theactive set is poor. Under this situation, blind handover istriggered to prevent call drops. The urgent blindhandover is triggered in a special occasion that requireson-site measurements on the pilot strength and signalquality in the best cell of the cell where the UE is located.Generally, this function need not be enabled, so theparameter is set to the lowest value by default, indicatingthat the blind handover is not triggered.If this parameteris set to a greater value, the probability of triggeringevent 1F increases. If this parameter is set to a smallervalue, the probability of triggering event 1F reduces. Fordetails on the definition of event 1F, see 3GPP TS25.331.If this parameter is set to a greater value, theprobability of triggering blind handover increases. If thisparameter is set to a smaller value, the probability oftriggering blind handover reduces. In actual scenarios,this parameter should be set according to the handoverstrategy and network coverage.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -24

IntraAblThdFor1FRSCP BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: RSCP absolute threshold for event 1F in theSHO algorithm. This parameter must be set to the valuethat guarantees the quality of basic services. In addition,the value of this parameter affects event 1F triggering.

Event 1F refers to the event reported when an urgentblind handover is triggered. If event 1F is reported in acell belonging to the active set, the signal quality of theactive set is poor. Under this situation, blind handover istriggered to prevent call drops.The urgent blindhandover is triggered in a special occasion that requireson-site measurements on the pilot strength and signalquality in the best cell of the cell where the UE is located.

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Generally, this function need not be enabled, so theparameter is set to the lowest value by default, indicatingthat the blind handover is not triggered.If this parameteris set to a greater value, the probability of triggeringevent 1F increases. If this parameter is set to a smallervalue, the probability of triggering event 1F reduces. Fordetails on the definition of event 1F, see 3GPP TS25.331.If this parameter is set to a greater value, theprobability of triggering blind handover increases. If thisparameter is set to a smaller value, the probability oftriggering blind handover reduces. In actual scenarios,this parameter should be set according to the handoverstrategy and network coverage.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -115

IntraFreqMeasQuantity BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Quantity of the triggered measurements forintra-frequency handovers. This parameter specifies thereference measurement quantity for the UE to reportevent 1x. For events 1A, 1B, 1C, and 1D which adoptrelative thresholds, the measurement quantity does nothave great impact on the threshold values. For event 1Fwhich adopts absolute threshold, the measurementquantity should be set based on the reality of the cell. Ifthe cell is located in the center of the coverage area, themain factor that affects signal quality is intra-frequencyinterference. In this case, you are advised to set thisparameter to CPICH_EC/NO. If the cell is located at theborder of the coverage area, the main factor that affectssignal quality is the distance between the cell and thebase station. In this case, you are advised to set thisparameter to CPICH_RSCP.

GUI Value Range: CPICH_EC/NO, CPICH_RSCP

Actual Value Range: CPICH_EC/NO, CPICH_RSCP

Default Value: CPICH_EC/NO

IntraRelThdFor1ACSNVP BSC6900SET UINTRAFREQHO(Optional) Meaning: Relative threshold for event 1A decision whennon-VP service is performed in CS domain. If thisparameter is set to a greater value, the probability oftriggering event 1A increases. If this parameter is set to asmaller value, the probability of triggering event 1Areduces. For details on the definition of event 1A, see3GPP TS 25.331.The relative threshold can directlyaffect the SHO ratio. Therefore, the threshold should bewisely chosen to achieve smooth SHOs.

The value of this parameter determines the SHO areaand SHO ratio. In the CDMA system, the ratio of the UEinvolved in soft handover should reach 30% to 40% toensure smooth handover. Based on simulation results,when the relative threshold is set to 5 dB, the ratio of theUE involved in soft handover (the number of cells in theactive set is at least 2) is about 35%. you are advised toset the relative threshold to a great value (5 dB to 7 dB)during site deployment, and to reduce the thresholdwhen the users increase. the threshold must be higherthan 3 dB to avoid the ping-pong handover.

You can set different relative thresholds for event 1A andevent 1B to reduce the ping-pong effect and change thesoft handover ratio. In general applications, the relativethresholds for events 1A and 1B should be consistent,and you can curb the ping-pong effect through thetriggering delay, L3 filtering coefficient, and hysteresis. Insome specific applications, if the ping-pong effect cannotbe curbed by adjusting the hysteresis values for event1A and event 1B, you can curb it by setting a higherrelative threshold for event 1B and a lower threshold forevent 1A. Impact on Network Performance: If thisparameter is set to a greater value, the probability ofadding a cell to the active set increases. In this case,more UEs are in soft handover status; however, moreforward resources are occupied. If this parameter is setto a smaller value, the probability of adding a cell to theactive set reduces. Under this situation, the

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communication quality cannot be guaranteed, andsmooth handover may be affected.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 6

IntraRelThdFor1ACSNVP BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Relative threshold for event 1A decision whennon-VP service is performed in CS domain. If thisparameter is set to a greater value, the probability oftriggering event 1A increases. If this parameter is set to asmaller value, the probability of triggering event 1Areduces. For details on the definition of event 1A, see3GPP TS 25.331.The relative threshold can directlyaffect the SHO ratio. Therefore, the threshold should bewisely chosen to achieve smooth SHOs.

The value of this parameter determines the SHO areaand SHO ratio. In the CDMA system, the ratio of the UEinvolved in soft handover should reach 30% to 40% toensure smooth handover. Based on simulation results,when the relative threshold is set to 5 dB, the ratio of theUE involved in soft handover (the number of cells in theactive set is at least 2) is about 35%. you are advised toset the relative threshold to a great value (5 dB to 7 dB)during site deployment, and to reduce the thresholdwhen the users increase. the threshold must be higherthan 3 dB to avoid the ping-pong handover.

You can set different relative thresholds for event 1A andevent 1B to reduce the ping-pong effect and change thesoft handover ratio. In general applications, the relativethresholds for events 1A and 1B should be consistent,and you can curb the ping-pong effect through thetriggering delay, L3 filtering coefficient, and hysteresis. Insome specific applications, if the ping-pong effect cannotbe curbed by adjusting the hysteresis values for event1A and event 1B, you can curb it by setting a higherrelative threshold for event 1B and a lower threshold forevent 1A. Impact on Network Performance: If thisparameter is set to a greater value, the probability ofadding a cell to the active set increases. In this case,more UEs are in soft handover status; however, moreforward resources are occupied. If this parameter is setto a smaller value, the probability of adding a cell to theactive set reduces. Under this situation, thecommunication quality cannot be guaranteed, andsmooth handover may be affected.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 6

IntraRelThdFor1ACSVP BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Relative threshold for event 1A decision whenVP service is performed. If this parameter is set to agreater value, the probability of triggering event 1Aincreases. If this parameter is set to a smaller value, theprobability of triggering event 1A reduces. For details onthe definition of event 1A, see 3GPP TS 25.331.Therelative threshold can directly affect the SHO ratio.Therefore, the threshold should be wisely chosen toachieve smooth SHOs. The value of this parameterdetermines the SHO area and SHO ratio. In the CDMAsystem, the ratio of the UE involved in soft handovershould reach 30% to 40% to ensure smooth handover.Based on simulation results, when the relative thresholdis set to 5 dB, the ratio of the UE involved in softhandover (the number of cells in the active set is at least2) is about 35%. you are advised to set the relativethreshold to a great value (5 dB to 7 dB) during sitedeployment, and to reduce the threshold when the usersincrease. the threshold must be higher than 3 dB toavoid the ping-pong handover.

You can set different relative thresholds for event 1A andevent 1B to reduce the ping-pong effect and change thesoft handover ratio. In general applications, the relativethresholds for events 1A and 1B should be consistent,

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and you can curb the ping-pong effect through thetriggering delay, L3 filtering coefficient, and hysteresis. Insome specific applications, if the ping-pong effect cannotbe curbed by adjusting the hysteresis values for event1A and event 1B, you can curb it by setting a higherrelative threshold for event 1B and a lower threshold forevent 1A. Impact on Network Performance: If thisparameter is set to a greater value, the probability ofadding a cell to the active set increases. In this case,more UEs are in soft handover status; however, moreforward resources are occupied.If this parameter is set toa smaller value, the probability of adding a cell to theactive set reduces. Under this situation, thecommunication quality cannot be guaranteed, andsmooth handover may be affected.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 6

IntraRelThdFor1APS BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Relative threshold for event 1A decision whenPS service is performed. If this parameter is set to agreater value, the probability of triggering event 1Aincreases. If this parameter is set to a smaller value, theprobability of triggering event 1A reduces. For details onthe definition of event 1A, see 3GPP TS 25.331. Therelative threshold can directly affect the SHO ratio.Therefore, the threshold should be wisely chosen toachieve smooth SHOs. The value of this parameterdetermines the SHO area and SHO ratio. In the CDMAsystem, the ratio of the UE involved in soft handovershould reach 30% to 40% to ensure smooth handover.Based on simulation results, when the relative thresholdis set to 5 dB, the ratio of the UE involved in softhandover (the number of cells in the active set is at least2) is about 35%. You are advised to set the relativethreshold to a great value (5 dB to 7 dB) during sitedeployment, and to reduce the threshold when the usersincrease. the threshold must be higher than 3 dB toavoid the ping-pong handover.

You can set different relative thresholds for event 1A andevent 1B to reduce the ping-pong effect and change thesoft handover ratio. In general applications, the relativethresholds for events 1A and 1B should be consistent,and you can curb the ping-pong effect through thetriggering delay, L3 filtering coefficient, and hysteresis. Insome specific applications, if the ping-pong effect cannotbe curbed by adjusting the hysteresis values for event1A and event 1B, you can curb it by setting a higherrelative threshold for event 1B and a lower threshold forevent 1A. Impact on Network Performance: If thisparameter is set to a greater value, the probability ofadding a cell to the active set increases. In this case,more UEs are in soft handover status; however, moreforward resources are occupied. If this parameter is setto a smaller value, the probability of adding a cell to theactive set reduces. Under this situation, thecommunication quality cannot be guaranteed, andsmooth handover may be affected.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 6

IntraRelThdFor1BCSNVP BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Relative threshold for event 1B decision whennon-VP service is performed in CS domain. If thisparameter is set to a smaller value, the probability oftriggering event 1B increases. If this parameter is set to agreater value, the probability of triggering event 1Breduces. For details on the definition of event 1B, see3GPP TS 25.331. The relative threshold can directlyaffect the SHO ratio. Therefore, the threshold should bewisely chosen to achieve smooth SHOs. The value of thisparameter determines the SHO area and SHO ratio. Inthe CDMA system, the ratio of the UE involved in softhandover should reach 30% to 40% to ensure smooth

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handover. Based on simulation results, when the relativethreshold is set to 5 dB, the ratio of the UE involved insoft handover (the number of cells in the active set is atleast 2) is about 35%. You are advised to set the relativethreshold to a great value (5 dB to 7 dB) during sitedeployment, and to reduce the threshold when the usersincrease. the threshold must be higher than 3 dB toavoid the ping-pong handover.

You can set different relative thresholds for event 1A andevent 1B to reduce the ping-pong effect and change thesoft handover ratio. In general applications, the relativethresholds for events 1A and 1B should be consistent,and you can curb the ping-pong effect through thetriggering delay, L3 filtering coefficient, and hysteresis. Insome specific applications, if the ping-pong effect cannotbe curbed by adjusting the hysteresis values for event1A and event 1B, you can curb it by setting a higherrelative threshold for event 1B and a lower threshold forevent 1A. Impact on Network Performance: If thisparameter is set to a greater value, the probability ofadding a cell to the active set increases. In this case,more UEs are in soft handover status; however, moreforward resources are occupied. If this parameter is setto a smaller value, the probability of adding a cell to theactive set reduces. Under this situation, thecommunication quality cannot be guaranteed, andsmooth handover may be affected.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 12

IntraRelThdFor1BCSVP BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Relative threshold for event 1B decision whenVP service is performed. If this parameter is set to asmaller value, the probability of triggering event 1Bincreases. If this parameter is set to a greater value, theprobability of triggering event 1B reduces. For details onthe definition of event 1B, see 3GPP TS 25.331. Therelative threshold can directly affect the SHO ratio.Therefore, the threshold should be wisely chosen toachieve smooth SHOs. The value of this parameterdetermines the SHO area and SHO ratio. In the CDMAsystem, the ratio of the UE involved in soft handovershould reach 30% to 40% to ensure smooth handover.Based on simulation results, when the relative thresholdis set to 5 dB, the ratio of the UE involved in softhandover (the number of cells in the active set is at least2) is about 35%. You are advised to set the relativethreshold to a great value (5 dB to 7 dB) during sitedeployment, and to reduce the threshold when the usersincrease. the threshold must be higher than 3 dB toavoid the ping-pong handover.

You can set different relative thresholds for event 1A andevent 1B to reduce the ping-pong effect and change thesoft handover ratio. In general applications, the relativethresholds for events 1A and 1B should be consistent,and you can curb the ping-pong effect through thetriggering delay, L3 filtering coefficient, and hysteresis. Insome specific applications, if the ping-pong effect cannotbe curbed by adjusting the hysteresis values for event1A and event 1B, you can curb it by setting a higherrelative threshold for event 1B and a lower threshold forevent 1A. Impact on Network Performance: If thisparameter is set to a greater value, the probability ofadding a cell to the active set increases. In this case,more UEs are in soft handover status; however, moreforward resources are occupied. If this parameter is setto a smaller value, the probability of adding a cell to theactive set reduces. Under this situation, thecommunication quality cannot be guaranteed, andsmooth handover may be affected.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 12

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IntraRelThdFor1BPS BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Relative threshold for event 1B decision whenPS service is performed. If this parameter is set to asmaller value, the probability of triggering event 1Bincreases. If this parameter is set to a greater value, theprobability of triggering event 1B reduces. For details onthe definition of event 1B, see 3GPP TS 25.331. Therelative threshold can directly affect the SHO ratio.Therefore, the threshold should be wisely chosen toachieve smooth SHOs. The value of this parameterdetermines the SHO area and SHO ratio. In the CDMAsystem, the ratio of the UE involved in soft handovershould reach 30% to 40% to ensure smooth handover.Based on simulation results, when the relative thresholdis set to 5 dB, the ratio of the UE involved in softhandover (the number of cells in the active set is at least2) is about 35%. You are advised to set the relativethreshold to a great value (5 dB to 7 dB) during sitedeployment, and to reduce the threshold when the usersincrease. the threshold must be higher than 3 dB toavoid the ping-pong handover.

You can set different relative thresholds for event 1A andevent 1B to reduce the ping-pong effect and change thesoft handover ratio. In general applications, the relativethresholds for events 1A and 1B should be consistent,and you can curb the ping-pong effect through thetriggering delay, L3 filtering coefficient, and hysteresis. Insome specific applications, if the ping-pong effect cannotbe curbed by adjusting the hysteresis values for event1A and event 1B, you can curb it by setting a higherrelative threshold for event 1B and a lower threshold forevent 1A. Impact on Network Performance: If thisparameter is set to a greater value, the probability ofadding a cell to the active set increases. In this case,more UEs are in soft handover status; however, moreforward resources are occupied. If this parameter is setto a smaller value, the probability of adding a cell to theactive set reduces. Under this situation, thecommunication quality cannot be guaranteed, andsmooth handover may be affected.

GUI Value Range: 0~29

Actual Value Range: 0~14.5

Default Value: 12

LimitCMDlSFThd BSC6900SET UCMCF(Mandatory) Meaning: Downlink SF threshold for enablingcompressed mode (CM).

When the parameter "DlSFLimitCMInd" is set to TRUEand the current downlink SF is smaller than or equal tothe value of this parameter, the active set qualitymeasurement is not allowed, that is, the CM cannot beenabled. When the parameter "DlSFLimitCMInd" is set toTRUE and the current downlink SF is greater than thevalue of this parameter, the active set qualitymeasurement is allowed, that is, the CM can be enabled.

GUI Value Range: D8, D16, D32, D64, D128, D256

Actual Value Range: 8, 16, 32, 64, 128, 256

Default Value: D8

MaxCellInActiveSet BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Maximum number of cells in an active set. Thisparameter is used to achieve the balance between thesignal quality in the SHO area and the systemperformance. If more cells are in the active set, a usercan obtain a greater macro diversity gain; the intra-frequency interference is smaller. In this case, however,the user occupies resources of several cells. Thisincreases the amount of data to be processed andlowers the system performance. To reduce intra-frequency interference, it is recommended that thenumber of cells in the active sets should be increased inthe hot-spot and micro cells, where the signals arecomplicated. For the cell that provides high speedservices, the decrease in cells in the active set canreduce the consumption of system resources.

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GUI Value Range: 1~6

Actual Value Range: 1~6

Default Value: 3

MaxEdchCellInActiveSet BSC6900SET UHOCOMM(Optional) Meaning: This parameter determines the maximumnumber of links in the EDCH active set. When the RNCacts as the SRNC, the number of links in the EDCHactive set for all the UEs under the RNC cannot exceedthe parameter value. If the parameter value is too large,a lot of resources on the RAN side will be occupied asthe same data is transferred over multiple EDCH links inmacro diversity, thus affecting the system performance. Ifthis parameter value is too small, insufficient combinationgain can be achieved in macro diversity by the EDCH,which causes excessive retransmissions and affects theUE speed.

GUI Value Range: 1~4

Actual Value Range: 1~4

Default Value: 3

MeasQuantityOf3A BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Measurement quantity used in coverage-basedinter-RAT measurement in event 3A-triggered reportingmode.

When CPICH_Ec/No is selected, it indicates that theEc/No measurement quantity is used for event 3Ameasurement. The physical unit is dB.

When CPICH_RSCP is selected, it indicates that theRSCP measurement quantity is used for event 3Ameasurement. The physical unit is dBm.

When AUTO is selected, it indicates that the Ec/Nomeasurement quantity is used for event 3A measurementif the RNC receives Ec/No 2D firstly. If the RNC receivesthe RSCP 2D firstly, the RSCP measurement quantity isused for event 3A measurement.

GUI Value Range: CPICH_EC/NO, CPICH_RSCP, AUTO

Actual Value Range: CPICH_EC/NO, CPICH_RSCP,AUTO

Default Value: AUTO

NBMMachsResetAlgoSelSwitch BSC6900ADD UCELLALGOSWITCH(Optional)

MOD UCELLALGOSWITCH(Optional)

Meaning: The algorithms with the above valuesrepresent are as follow:

ALGORITHM_REQUIRED: Always reset the mac-hs nomatter the cells in question are in the same NodeB ornot.

ALGORITHM_DEPEND_ON_LCG: Reset the mac-hs onlywhen the cells in question are in the different local cellgroup.

GUI Value Range: ALGORITHM_REQUIRED,ALGORITHM_DEPEND_ON_LCG

Actual Value Range: ALGORITHM_REQUIRED,ALGORITHM_DEPEND_ON_LCG

Default Value: ALGORITHM_DEPEND_ON_LCG

NFastSpdEst BSC6900ADD UCELLHCSHO(Optional)

MOD UCELLHCSHO(Optional)

Meaning: Threshold for determining whether the UE is inhigh-mobility state.

After the UE reports event 1D, the UE is considered inhigh-mobility state if the number of changes of the bestcell during "TFastSpdEst" is greater than this threshold.The smaller the value is, the more possible the UE isdetermined in high-mobility state.

GUI Value Range: 1~16

Actual Value Range: 1~16

Default Value: 15

NPrio BSC6900ADD UINTERFREQNCELL(Mandatory)

MOD UINTERFREQNCELL(Mandatory)

Meaning: The priority that corresponds to theneighboring cell is valid only when the parameter is set toTRUE. The neighboring cell with a lower priority is morepossibly delivered as the measurement object. Forexample, the neighboring cell with priority 1 is morepossible to be selected as the measurement object than

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the neighboring cell with priority 2.

GUI Value Range: 0~63

Actual Value Range: 0~63

Default Value: None

NPrio BSC6900ADD UINTRAFREQNCELL(Mandatory)

MOD UINTRAFREQNCELL(Mandatory)

Meaning: Priority of neighboring cells. The priorityassigned to a neighboring cell is valid only when thisparameter is set to "TRUE". The neighboring cell with alower priority is more possibly delivered as themeasurement object. For example, the neighboring cellwith priority 1 is more possible to be selected as themeasurement object than the neighboring cell withpriority 2.

GUI Value Range: 0~30

Actual Value Range: 0~30

Default Value: None

NPrioFlag BSC6900ADD UINTRAFREQNCELL(Optional)

MOD UINTRAFREQNCELL(Optional)

Meaning: Priority flag of neighboring cells

The value TRUE indicates that the neighboring cellpriority is valid, and the value FALSE indicates that theneighboring cell priority is invalid. In the algorithm ofneighboring cell combination, the cell with an invalidpriority is the last one to be considered as themeasurement object.

GUI Value Range: FALSE, TRUE

Actual Value Range: FALSE, TRUE

Default Value: FALSE

NPrioFlag BSC6900ADD U2GNCELL(Optional)

MOD U2GNCELL(Optional)

Meaning: Priority flag of neighboring cells

The value TRUE indicates that the neighboring cellpriority is valid, and the value FALSE indicates that theneighboring cell priority is invalid. In the algorithm ofneighboring cell combination, the cell with an invalidpriority is the last one to be considered as themeasurement object.

GUI Value Range: FALSE, TRUE

Actual Value Range: FALSE, TRUE

Default Value: FALSE

NSlowSpdEst BSC6900ADD UCELLHCSHO(Optional)

MOD UCELLHCSHO(Optional)

Meaning: Threshold for determining whether the UE is inlow-mobility state.

After the UE reports event 1D, the UE is considered inlow-mobility state if the number of changes of the bestcell is smaller than this threshold within the period of"TSlowSpdEst". The greater the value is, the morepossible the UE is determined in low-mobility state.

GUI Value Range: 1~16

Actual Value Range: 1~16

Default Value: 3

NcovHoOn2GldInd BSC6900SET UINTERRATHONCOV(Optional) Meaning: When this parameter is set to "ON", the RNCwill stop the non-coverage based inter-RAT handover ifthe load of the GSM cell exceeds the related threshold. Ifthis parameter is set to "OFF", the RNC will not stop thehandover. This parameter is used to determine whetherto stop the non-coverage based handover from theUMTS network to the GSM network based on the load ofthe GSM cell. The GSM network is required inform theUMTS network of its load information. In this case, theRNC determines whether to send the non-coveragebased handover request to the GSM cell according tothe load information of the GSM cell and the loadthreshold of the GSM cell set in the UMTS cell. Thisparameter is invalid when the GSM network cannotprovide the load information to the UMTS network.

GUI Value Range: OFF, ON

Actual Value Range: OFF, ON

Default Value: ON

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PSHOOut2GloadThd BSC6900ADDUCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

Meaning: This parameter specifies the threshold for 2Gload of relocation target, in an inter-RAT handover in PSdomain. When the GSM load policy is used, that is, when"NcovHoOn2GldInd" in "SET UINTERRATHONCOV" is setto ON, a non-coverage-based handover to a 2G cell isstopped in a non-coverage-based 3G-to-2G handoverprocedure if the uplink or downlink normalized loadcarried in the relocation response message from the 2Gsystem exceeds the value of this parameter.

GUI Value Range: 0~100

Actual Value Range: 0~1

Default Value: 60

PSServiceHOSwitch BSC6900ADD UCELLHOCOMM(Optional)

MOD UCELLHOCOMM(Optional)

Meaning: Whether the cell allows inter-RAT handover forPS services.

When the switch is set to ON, the inter-RAT handover forPS services is enabled. When the switch is set to OFF,the inter-RAT handover for PS services is disabled.

Based on the Service Handover Indicator of a serviceand the related parameter configurations on the networkside, related measurements and inter-RAT handover aretriggered immediately once a service is set up. Thisswitch is set to ON only when service handover isrequired. Generally, the switch is set to OFF.

Note that the service handover is triggered only when theService Handover Indicator is set toHO_TO_GSM_SHOULD_BE_PERFORM and the inter-RAT handover switch for the corresponding service is setto ON. Both conditions are mandatory. For hybridservices, the service handover is not triggered.

GUI Value Range: OFF, ON

Actual Value Range: OFF, ON

Default Value: OFF

PeriodFor2B BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Sets the interval between the failure in theinter-frequency handover triggered by the event 2B andthe inter-frequency handover retry.

GUI Value Range: 1~64

Actual Value Range: 500~32000

Default Value: 1

PeriodFor2C BSC6900ADDUCELLINTERFREQHONCOV(Optional)

MODUCELLINTERFREQHONCOV(Optional)

Meaning: Interval between the handover re-attempts forevent 2C.

If the inter-frequency handover for event 2C fails, theRNC reties the inter-frequency handover. This parameterspecifies the interval between the handover re-attemptsfor event 2C. If this parameter is set to a smaller value,handover re-attempts increase when the inter-frequencyhandover fails. In this case, the UE can be quicklyhanded over to the target cell whose load is reduced.The RNC load, however, increases.

GUI Value Range: 1~64

Actual Value Range: 500~32000

Default Value: 4

PeriodFor3A BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Interval between handover attempts for event3A.

This parameter specifies the interval between handoverattempts for event 3A. If this parameter is set to a smallervalue, handover attempts increase when the inter-RAThandover fails. In this case, the UE can be quicklyhanded over to the target cell whose load is reduced,thus lowering the probability of call drops. Morehandover re-attempts, however, cause the increase inthe RNC load.

GUI Value Range: 1~64

Actual Value Range: 500~32000

Default Value: 1

PeriodFor3C BSC6900ADD Meaning: Interval between the handover re-attempts for

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UCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

event 3C.

This parameter specifies the interval between thehandover re-attempts for event 3C. If this parameter isset to a smaller value, handover re-attempts increasewhen the inter-RAT handover fails. In this case, the UEcan be quickly handed over to the target cell whose loadis reduced, thus lowering the probability of call drops.More handover re-attempts, however, cause theincrease in the RNC load.

GUI Value Range: 1~64

Actual Value Range: 500~32000

Default Value: 4

PeriodMRReportNumfor1A BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Maximum number of reporting event 1A afterthe reporting mode is changed to periodical reporting.When the number of reporting event 1A exceeds thisparameter, the periodical reporting is disabled.

GUI Value Range: D1, D2, D4, D8, D16, D32, D64,INFINITY

Actual Value Range: 1, 2, 4, 8, 16, 32, 64, INFINITY

Default Value: D16

PeriodMRReportNumfor1C BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Maximum number of reporting event 1C afterthe reporting mode is changed to periodical reporting.When the number of reporting event 1C exceeds thisparameter, the periodical reporting is disabled.

GUI Value Range: D1, D2, D4, D8, D16, D32, D64,INFINITY

Actual Value Range: 1, 2, 4, 8, 16, 32, 64, INFINITY

Default Value: D16

PeriodMRReportNumfor1J BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Maximum number of reporting event 1J afterthe reporting mode is changed to periodical reporting.When the number of reporting event 1J exceeds thisparameter, the periodical reporting is disabled.

GUI Value Range: D1, D2, D4, D8, D16, D32, D64,INFINITY

Actual Value Range: 1, 2, 4, 8, 16, 32, 64, INFINITY

Default Value: D64

PrdReportInterval BSC6900ADD UCELLMCLDR(Optional)

MOD UCELLMCLDR(Optional)

Meaning: The interval between two reports is theconfigured value.

This parameter has impact on the Uu signaling flow. If theinterval is too short and the frequency is too high, theRNC may have burden in processing signaling. If theinterval is too long, the network cannot detect the signalchange in time, which may delay the inter-frequencyhandover.

GUI Value Range: D250, D500, D1000, D2000, D3000,D4000, D6000, D8000, D12000, D16000, D20000,D24000, D28000, D32000, D64000

Actual Value Range: 250, 500, 1000, 2000, 3000, 4000,6000, 8000, 12000, 16000, 20000, 24000, 28000,32000, 64000

Default Value: D3000

PrdReportInterval BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Interval between periodic reporting for theinter-frequency handover.

In periodic reporting mode, the inter-frequency handoverattempts is reported at the preset interval. It is notrecommended that this parameter be set to"NON_PERIODIC_REPORT" since the UE behavior maybe unknown. This parameter has impact on the Uusignaling flow. If the interval is too short and thefrequency is too high, the RNC may have high load whenprocessing signaling. If the interval is too long, thenetwork cannot detect the signal changes in time. Thismay delay the inter-frequency handover, thus causingcall drops.

GUI Value Range: NON_PERIODIC_REPORT(Non

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periodical reporting), D250(D250), D500(D500),D1000(D1000), D2000(D2000), D3000(D3000),D4000(D4000), D6000(D6000), D8000(D8000),D12000(D12000), D16000(D16000), D20000(D20000),D24000(D24000), D28000(D28000), D32000(D32000),D64000(D64000)

Actual Value Range: NON_PERIODIC_REPORT, 250,500, 1000, 2000, 3000, 4000, 6000, 8000, 12000,16000, 20000, 24000, 28000, 32000, 64000

Default Value: D500

RatCellType BSC6900ADD UEXT2GCELL(Mandatory)

MOD UEXT2GCELL(Optional)

Meaning: Identifying the type of the inter-RAT cellNO_CAPABILITY indicates that the capacity of the GSMcell remains unknown. It is not recommended to set thecell type to NO_CAPABILITY. If the cell type isNO_CAPABILITY, the inter-RAT handover cannot betriggered.

GUI Value Range: NO_CAPABILITY(Cell capabilityunknown), GSM(GSM), GPRS(GPRS), EDGE(EDGE)

Actual Value Range: NO_CAPABILITY, GSM, GPRS,EDGE

Default Value: None

RelThdForDwnGrd BSC6900SET UINTRAFREQHO(Optional) Meaning: Relative threshold for immediate rate reductionafter soft handover failure. The rate reduction of theactive set and SHO retry procedure can be triggeredwithout intra-frequency Measurement reports if thequality of the cell in the set fulfills the following criterion:Mnew > Mbest_cell - RelThdForDwnGrd

Here,

Mnew: the CPICH Ec/No measurement value of the failedcell1

CPICH Ec/No measurement value in the latestmeasurement report of the best cell identified by theRNC according to 1D

RelThdForDwnGrd: the relative threshold for direct ratereduction. It can be configured on the OMU server.

Note: If this parameter is set to smaller value, theprobability of triggering SHO rate reduction becomes low;however, the intra-frequency interference caused by thecell that is not added to the active set becomes great.This may cause call drops. On the contrary, if thisparameter is set to a larger value, the probability oftriggering SHO rate reduction becomes high, and thesignal quality is guaranteed; however, frequent triggeringof SHO rate reduction may affect the user experience.

GUI Value Range: -29~29

Actual Value Range: -14.5~14.5

Default Value: 2

ReportIntervalfor1A BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Interval at which event 1A is reported after thereporting mode is changed to periodical reporting.Generally, event 1A is reported only once. To avoid theloss of measurement reports, the UE sets the mode ofreporting event 1A to periodical if the cell reporting event1A is not added to the active set in a specified period oftime. Event 1A is reported for"PeriodMRReportNumfor1A" times at the intervalspecified by this parameter. If the mode of reportingevent 1A is set to "NON_PERIODIC_REPORT", the UEcannot change the event 1A reporting mode toperiodical.

GUI Value Range: NON_PERIODIC_REPORT, D250,D500, D1000, D2000, D4000, D8000, D16000

Actual Value Range: NON_PERIODIC_REPORT, 250,500, 1000, 2000, 4000, 8000, 16000

Default Value: D4000

ReportIntervalfor1C BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Interval at which event 1A is reported after thereporting mode is changed to periodical reporting.Generally, event 1C is reported only once. To avoid the

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loss of measurement reports, the UE set the mode ofreporting event 1C to periodical if the cell reporting event1C is not added to the active set in a specified period oftime. Event 1C is reported for"PeriodMRReportNumfor1C" times at the intervalspecified by this parameter.If the mode of reporting event1C is set to "NON_PERIODIC_REPORT", the UE cannotchange the event 1C reporting mode to periodical.

GUI Value Range: NON_PERIODIC_REPORT, D250,D500, D1000, D2000, D4000, D8000, D16000

Actual Value Range: NON_PERIODIC_REPORT, 250,500, 1000, 2000, 4000, 8000, 16000

Default Value: D4000

ReportIntervalfor1J BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Interval at which event 1J is reported after thereporting mode is changed to periodical reporting.Generally, event 1J is reported only once. To avoid theloss of measurement reports, the UE set the mode ofreporting event 1J to periodical if the cell reporting event1J is not added to the DCH active set in a specifiedperiod of time. Event 1J is reported for"PeriodMRReportNumfor1J" times at the intervalspecified by this parameter.If the mode of reporting event1J is set to "NON_PERIODIC_REPORT", the UE cannotchange the event 1J reporting mode to periodical.

GUI Value Range: NON_PERIODIC_REPORT, D250,D500, D1000, D2000, D4000, D8000, D16000

Actual Value Range: NON_PERIODIC_REPORT, 250,500, 1000, 2000, 4000, 8000, 16000

Default Value: D1000

Req2GCap BSC6900ADD UTYPRABBASIC(Mandatory)

MOD UTYPRABBASIC(Optional)

Meaning: Minimum capability of the 2G cell required forinter-RAT handover from 3G network to 2G network. Ifthe 2G cell is not capable, the handover will not beperformed. An EDGE cell is more capable of supportingPS services than a GPRS cell, whereas a GPRS cellmore capable than a GSM cell.

GUI Value Range: GSM, GPRS, EDGE

Actual Value Range: GSM, GPRS, EDGE

Default Value: None

RetryCapability BSC6900SET UFRC(Optional) Meaning: This parameter specifies which HSPAtechnologies can be retried by UEs. When the HSPAtechnologies are selected and currently UE is not usingthem, RNC will initiate these HSPA technologies retry forUE.

GUI Value Range: SRB_OVER_HSDPA,SRB_OVER_HSUPA, TTI_2MS, MIMO, 64QAM,DL_L2_ENHANCE, DTX_DRX,HSSCCH_LESS_OPERATION, MIMO_64QAM,DC_HSDPA, UL_L2_ENHANCE, UL_16QAM,EDPCCH_BOOSTING, DCMIMO_HSDPA

Actual Value Range: SRB_OVER_HSDPA,SRB_OVER_HSUPA, TTI_2MS, MIMO, 64QAM,DL_L2_ENHANCE, DTX_DRX,HSSCCH_LESS_OPERATION, MIMO_64QAM,DC_HSDPA, UL_L2_ENHANCE, UL_16QAM,EDPCCH_BOOSTING, DCMIMO_HSDPA

Default Value: None

SHInd BSC6900ADD UTYPRABBASIC(Mandatory)

MOD UTYPRABBASIC(Optional)

Meaning: Service handover attribute. If theHO_INTER_RAT_RNC_SERVICE_HO_SWITCH is set toON, the service handover setting of this parameter isapplied. Otherwise, the service handover settingassigned by the CN is applied.

- HO_TO_GSM_SHOULD_BE_PERFORM: Handover tothe 2G network is performed so long as 2G signals areavailable.

- HO_TO_GSM_SHOULD_NOT_BE_PERFORM:Handover to the 2G network is performed when 3Gsignals are weak but 2G signals are strong.

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- HO_TO_GSM_SHALL_NOT_BE_PERFORM: Handoverto the 2G network is not performed even if 3G signalsare weak but 2G signals are strong.

GUI Value Range:HO_TO_GSM_SHOULD_BE_PERFORM,HO_TO_GSM_SHOULD_NOT_BE_PERFORM,HO_TO_GSM_SHALL_NOT_BE_PERFORM

Actual Value Range:HO_TO_GSM_SHOULD_BE_PERFORM,HO_TO_GSM_SHOULD_NOT_BE_PERFORM,HO_TO_GSM_SHALL_NOT_BE_PERFORM

Default Value: None

SHOQualmin BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: If events 1A, 1C, and 1D are reported to theRNC, the target cell can be added to the active set onlywhen CPICH Ec/No is greater than this parameter.

This parameter is used to set a baseline for the quality ofthe radio links to be added. The current events of softhandovers are defined on the basis of relative thresholdsand have no requirement for the absolute quality. If thesignal quality of added cells is too poor, the generalquality of the active set cannot be improved. In this case,however, more downlink resources are occupied andmore TPC errors are caused, and the soft handoverperformance is worsened. Therefore, this parameter isrequired.

Impact on network performance:

This parameter should be adjusted, based on theplanned Ec/No that the cell soft handover area isexpected to reach. If this parameter is set to a greatervalue, the probability for adding a neighboring cell to theactive set decreases. In this case, the service quality ofthe cell to be added is guaranteed. If this parameter isset to a smaller value, the probability for adding aneighboring cell to the active set increases. In this case,however, the service quality of the cell to be added is notguaranteed.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -24

SHOTRIG BSC6900ADD UNRNC(Mandatory)

MOD UNRNC(Optional)

Meaning: Indicating whether to trigger soft handovercross the Iur interface between the RNC and theneighboring RNC:

1) CS_SHO_SWITCH. Indicating whether to trigger softhandover for CS cross the Iur interface.

2) HSPA_SHO_SWITCH. Indicating whether to triggersoft handover for HSPA cross the Iur interface.

3) NON_HSPA_SHO_SWITCH. Indicating whether totrigger soft handover for PS(R99) cross the Iur interface.

GUI Value Range: CS_SHO_SWITCH,HSPA_SHO_SWITCH, NON_HSPA_SHO_SWITCH

Actual Value Range: CS_SHO_SWITCH,HSPA_SHO_SWITCH, NON_HSPA_SHO_SWITCH

Default Value: None

ShoFailNumForDwnGrd BSC6900SET UINTRAFREQHO(Optional) Meaning: Maximum number of SHO failures. Thisparameter specifies the maximum number of eventreporting from the cell that fails to be added to the activeset for soft handover. If the value reaches thisparameter, rate reduction of the active set will betriggered, and the cell will attempt to join the active setagain. If this parameter is set to smaller value, theprobability for rate reduction of active set becomes high;In this case, the cell that fails to be added to the activeset due to load may, with higher probability, join theactive set for soft handover; however, rate reduction mayaffects user experience. Note that this parameter needsto be considered in combination with the settings of ratereduction evaluation period, and the reporting intervalsof event 1A and 1C. Otherwise, the reports cannot reach

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the required numbers to trigger rate reduction during therate reduction evaluation period.

GUI Value Range: 0~63

Actual Value Range: 0~63

Default Value: 3

ShoFailPeriod BSC6900SET UINTRAFREQHO(Optional) Meaning: Maximum evaluation period of SHO failure.When the rate reduction evaluation is performed on acell that fails to join the active set, the evaluation timer isstarted. If the cell cannot fulfill the criterion for ratereduction before the timer expires, the cell will not beevaluated, and rate reduction re-attempt will not beinitiated. If this parameter is set to a greater value, theprobability for the target cell to join the active setbecomes high; however, since the RNC can handle onlythree evaluation processes simultaneously, the failed cellmay not be handled in time.

GUI Value Range: 0~120

Actual Value Range: 0~120

Default Value: 60

SndLdInfo2GsmInd BSC6900SET UINTERRATHONCOV(Optional) Meaning: If this parameter is set to "ON", the RNCinforms the GSM network of the load carried by theUMTS cell before the non-coverage-based inter-RAThandover. If this parameter is set to "OFF", the RNCdoes not inform the GSM network of the load carried bythe UMTS cell. This parameter is designed for the UMTSload-based access control strategy when the 3G-to-2Ghandover is required. When the UE is handed over fromthe UMTS network to the GSM network, the RNC obtainsthe load information of the best cell and sends it to theGSM network. This parameter is valid only for CSservice. The RNC does not send UMTS cell loadinformation to the GSM in PS domain.

GUI Value Range: OFF, ON

Actual Value Range: OFF, ON

Default Value: OFF

SuppPSHOFlag BSC6900ADD UEXT2GCELL(Optional)

MOD UEXT2GCELL(Optional)

Meaning: Identifying whether the inter-RAT cell supportsPS HO. TRUE indicates that the inter-RAT cell is able toperform the handover procedure with relocation. FALSEindicates that the cell is unable to do so.

GUI Value Range: FALSE, TRUE

Actual Value Range: FALSE, TRUE

Default Value: FALSE

SuppRIMFlag BSC6900ADD UEXT2GCELL(Optional)

MOD UEXT2GCELL(Optional)

Meaning: Identifying whether the inter-RAT cell supportsRIM. (RIM is used to obtain the SI/PSI information of theinter-RAT cell.) For the details of RIM process, refer tothe 3GPP TS 25.901 protocol.

GUI Value Range: FALSE, TRUE

Actual Value Range: FALSE, TRUE

Default Value: FALSE

TCycleSlow BSC6900ADD UCELLHCSHO(Optional)

MOD UCELLHCSHO(Optional)

Meaning: Period for determine whether the UE is in low-mobility state.

The RNC periodically determines whether the UE is inlow-mobility state. The smaller the value is, the morefrequently the state estimation is triggered. If theparameter is set to 0, the RNC does not determinewhether the UE is in low-mobility state.

GUI Value Range: 0~255

Actual Value Range: 0~255

Default Value: 60

TFastSpdEst BSC6900ADD UCELLHCSHO(Optional)

MOD UCELLHCSHO(Optional)

Meaning: Time window for estimating whether the UE is inhigh-mobility state.

The start point of the estimation is the moment of the lastreporting of event 1D, and the backdated time length isdetermined by this parameter. If the parameter is set to

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0, the RNC does not decide whether the UE is in high-mobility state.

GUI Value Range: 0~511

Actual Value Range: 0~511

Default Value: 180

TRelateLength BSC6900ADD UCELLHCSHO(Optional)

MOD UCELLHCSHO(Optional)

Meaning: Time window for determining whether ping-pong handover occurs in the best cell during the UEspeed estimation.

In the speed estimation algorithm, an algorithm isadopted to avoid inaccurate estimation caused byfrequent handovers of best cells. That is, during thelatest "TRELATELENGTH", if more than one event 1D ofa certain cell occurs, the event 1D record is restored tothe state when the 1st event 1D occurs during the latest"TRELATELENGTH". The given time length is set by thisparameter. If this parameter is set too great, the RNCmay mistakenly determine that ping-pong handover tothe best cell occurs. If this parameter is set too small,ping-pong handover cannot be prevented. Thus, it isrecommended that this parameter be set according tothe cell radius.

GUI Value Range: 0~120

Actual Value Range: 0~120

Default Value: 10

TSlowSpdEst BSC6900ADD UCELLHCSHO(Optional)

MOD UCELLHCSHO(Optional)

Meaning: Time window for deciding whether the UE is inlow-mobility state.

Every time the slow speed period timer expires, the RNCestimates whether the UE is in low-mobility state. Thisparameter specifies the duration of the timer. If thisparameter is set to 0, the RNC does not determinewhether the UE is in low-mobility state.

GUI Value Range: 0~511

Actual Value Range: 0~511

Default Value: 240

TargetFreqCsThdEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of the target frequency for triggeringinter-frequency measurement based on measurementquantity of Ec/No for CS services. For CS services, if theinter-frequency reporting mode is set to"EVENT_TRIGGER", this parameter is used to set thecriterion for triggering event 2B. That is, event 2B can betriggered when the quality of the target frequency ishigher than this threshold. If the inter-frequencyreporting mode is set to "PERIODIC_TRIGGER", thisparameter is used for handover decision.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

TargetFreqCsThdRscp BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of the target frequency for triggeringinter-frequency measurement based on measurementquantity of RSCP for CS services. For CS services, ForCS services, if the inter-frequency reporting mode is setto "EVENT_TRIGGER", this parameter is used to set thecriterion for triggering event 2B. That is, event 2B can betriggered when the quality of the target frequency ishigher than this threshold. If the inter-frequencyreporting mode is set to "PERIODIC_TRIGGER", thisparameter is used for handover decision.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

TargetFreqHThdEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of the target frequency for triggeringinter-frequency measurement based on measurementquantity of Ec/No for HSPA services.For HSPA services,For CS services, if the inter-frequency reporting mode isset to "EVENT_TRIGGER", this parameter is used to set

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the criterion for triggering event 2B. That is, event 2Bcan be triggered when the quality of the target frequencyis higher than this threshold. If the inter-frequencyreporting mode is set to "PERIODIC_TRIGGER", thisparameter is used for handover decision.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

TargetFreqHThdRscp BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of the target frequency for triggeringinter-frequency measurement based on measurementquantity of RSCP for HSPA services. For HSPA services,For CS services, if the inter-frequency reporting mode isset to "EVENT_TRIGGER", this parameter is used to setthe criterion for triggering event 2B. That is, event 2Bcan be triggered when the quality of the target frequencyis higher than this threshold. If the inter-frequencyreporting mode is set to "PERIODIC_TRIGGER", thisparameter is used for handover decision. Afterhandover, to prevent ping-pong handover, the inter-frequency measurement should not be started again.That is, this parameter is usually set greater than thestart threshold for event 2D or equal to the threshold ofevent 2F.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

TargetFreqR99PsThdEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of the target frequency for triggeringinter-frequency measurement based on measurementquantity of Ec/No for non-HSPA services in PSdomain.For non-HSPA services in PS domain, For CSservices, if the inter-frequency reporting mode is set to"EVENT_TRIGGER", this parameter is used to set thecriterion for triggering event 2B. That is, event 2B can betriggered when the quality of the target frequency ishigher than this threshold. If the inter-frequencyreporting mode is set to "PERIODIC_TRIGGER", thisparameter is used for handover decision.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

TargetFreqR99PsThdRscp BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of the target frequency for triggeringinter-frequency measurement based on measurementquantity of RSCP for non-HSPA services in PSdomain.For non-HSPA services in PS domain, For CSservices, if the inter-frequency reporting mode is set to"EVENT_TRIGGER", this parameter is used to set thecriterion for triggering event 2B. That is, event 2B can betriggered when the quality of the target frequency ishigher than this threshold. If the inter-frequencyreporting mode is set to "PERIODIC_TRIGGER", thisparameter is used for handover decision.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

TargetFreqThdEcN0 BSC6900ADD UCELLMCLDR(Optional)

MOD UCELLMCLDR(Optional)

Meaning: Estimate the signal quality of the periodicreports. The inter-frequency handover is triggered onlywhen the signal quality of the target cell is higher thanthis parameter. Note: The threshold can be reached onlywhen RSCP and EcNo of the target cell are above theRSCP and EcNo that are set in the command.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

TargetFreqThdRscp BSC6900ADD UCELLMCLDR(Optional)

MOD UCELLMCLDR(Optional)

Meaning: Estimate the signal quality of the periodicreports. The inter-frequency handover is triggered onlywhen the signal quality of the target cell is higher thanthis parameter. Note: The threshold can be reached only

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when RSCP and EcNo of the target cell are above theRSCP and EcNo that are set in the command.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

TargetRatCsThd BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Quality requirement for the cell of another RATduring inter-RAT handover for CS domain services.

For CS services, if the value of "Inter-RAT ReportingMode" is set to "EVENT_TRIGGER", this parameter isused to set the criterion for triggering event 3A. That is,event 3A is triggered only when the quality of the targetfrequency is higher than this threshold and themeasurement quality of the current CS services is lowerthan the quality of the currently used frequency. If thevalue of "Inter-RAT Reporting Mode" is set to"PERIODICAL_REPORTING", this parameter is used toevaluate inter-RAT coverage handovers at the RNC.Note that 0 means a value smaller than -110 dBm.

If the value of "Inter-RAT Reporting Mode" is set to"PERIODICAL_REPORTING", this parameter is used forthe assessment of inter-RAT coverage handover. Thatis, Tother_RAT in the following formulas. This parameteris the absolute threshold of the cell of another RAT(Received Signal Strength Indicator: RSSI) for the inter-RAT handover decision.

If the quality of the cell of another RAT in the inter-RATmeasurement report fulfils the following criterion:

Mother_RAT + CIO >= Tother_RAT + H/2

Then, the system starts the trigger timer, and makes thehandover decision after the timer expires. If the quality ofthe cell of another RAT fulfills the following criterionbefore timeout:

Mother_RAT + CIO < Tother_RAT - H/2

The RNC stops the timer and waits for another inter-RATmeasurement report.

Here,

Mother_RAT is the measurement result of the GSMRSSI.

Tother_RAT is the inter-RAT handover decisionthreshold.

Cell Individual Offset (CIO) is the offset for the cell ofanother inter-RAT.

H represents the hysteresis, the setting of which canreduce wrong decisions caused by signal jitters.

The sensitivity of a GSM mobile phone is -102 dBm.Considering a margin of 3 dB for compensation of fastfading, 5 dB for compensation of slow fading, 2 dB forcompensation of interference noise, and 2 dB forcompensation of ambient noise, the outdoor receptionlevel should not be lower than -90 dBm.

The parameter value can vary with the handover policy.To have UEs handed over only to GSM cells of highquality, the inter-RAT handover decision threshold canbe set to a comparatively large value, for example -85dBm.

GUI Value Range: 0~63

Actual Value Range: lower than -110, -110~-48(Actualvalue meets the condition: Actual Value = GUI Value -111)

Default Value: 16

TargetRatHThd BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Quality requirement for the cell of another RATduring inter-RAT handover for HSPA services.

For PS services, if the value of "Inter-RAT ReportingMode" is set to "EVENT_TRIGGER", this parameter isused to set the criterion for triggering event 3A. That is,event 3A is triggered only when the quality of the targetfrequency is higher than this threshold and the

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measurement quality of the current PS services is lowerthan the quality of the currently used frequency. If thevalue of "Inter-RAT Reporting Mode" is set to"PERIODICAL_REPORTING", this parameter is used toevaluate inter-RAT coverage handovers at the RNC.Note that 0 means a value smaller than -110 dBm.

If the value of "Inter-RAT Reporting Mode" is set to"PERIODICAL_REPORTING", this parameter is used forthe assessment of inter-RAT coverage handover. Thatis, Tother_RAT in the following formulas. This parameteris the absolute threshold of the cell of another RAT(Received Signal Strength Indicator: RSSI) for the inter-RAT handover decision.

If the quality of the cell of another RAT in the inter-RATmeasurement report fulfils the following criterion:

Mother_RAT + CIO >= Tother_RAT + H/2

Then, the system starts the trigger timer, and makes thehandover decision after the timer expires. If the quality ofthe cell of another RAT fulfills the following criterionbefore timeout:

Mother_RAT + CIO < Tother_RAT - H/2

The RNC stops the timer and waits for another inter-RATmeasurement report.

Here,

Mother_RAT is the measurement result of the GSMRSSI.

Tother_RAT is the inter-RAT handover decisionthreshold.

Cell Individual Offset (CIO) is the offset for the cell ofanother inter-RAT.

H represents the hysteresis, the setting of which canreduce wrong decisions caused by signal jitters.

The sensitivity of a GSM mobile phone is -102 dBm.Considering a margin of 3 dB for compensation of fastfading, 5 dB for compensation of slow fading, 2 dB forcompensation of interference noise, and 2 dB forcompensation of ambient noise, the outdoor receptionlevel should not be lower than -90 dBm.

The parameter value can vary with the handover policy.To have UEs handed over only to GSM cells of highquality, the inter-RAT handover decision threshold canbe set to a comparatively large value, for example -85dBm.

GUI Value Range: 0~63

Actual Value Range: lower than -110, -110~-48(Actualvalue meets the condition: Actual Value = GUI Value -111)

Default Value: 16

TargetRatR99PsThd BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Quality requirement for the cell of another RATduring inter-RAT handover for PS domain non-HSPAservices.

For PS domain non-HSPA services, if the value of "Inter-RAT Reporting Mode" is set to "EVENT_TRIGGER", thisparameter is used to set the criterion for triggering event3A. That is, event 3A is triggered only when the quality ofthe target frequency is higher than this threshold and themeasurement quality of the current PS services is lowerthan the quality of the currently used frequency. If thevalue of "Inter-RAT Reporting Mode" is set to"PERIODICAL_REPORTING", this parameter is used toevaluate inter-RAT coverage handovers at the RNC.Note that 0 means a value smaller than -110 dBm.

If the value of "Inter-RAT Reporting Mode" is set to"PERIODICAL_REPORTING", this parameter is used forthe assessment of inter-RAT coverage handover. Thatis, Tother_RAT in the following formulas. This parameteris the absolute threshold of the cell of another RAT(Received Signal Strength Indicator: RSSI) for the inter-

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RAT handover decision.

If the quality of the cell of another RAT in the inter-RATmeasurement report fulfils the following criterion:

Mother_RAT + CIO >= Tother_RAT + H/2

Then, the system starts the trigger timer, and makes thehandover decision after the timer expires. If the quality ofthe cell of another RAT fulfills the following criterionbefore timeout:

Mother_RAT + CIO < Tother_RAT - H/2

The RNC stops the timer and waits for another inter-RATmeasurement report.

Here,

Mother_RAT is the measurement result of the GSMRSSI.

Tother_RAT is the inter-RAT handover decisionthreshold.

Cell Individual Offset (CIO) is the offset for the cell ofanother inter-RAT.

H represents the hysteresis, the setting of which canreduce wrong decisions caused by signal jitters.

The sensitivity of a GSM mobile phone is -102 dBm.Considering a margin of 3 dB for compensation of fastfading, 5 dB for compensation of slow fading, 2 dB forcompensation of interference noise, and 2 dB forcompensation of ambient noise, the outdoor receptionlevel should not be lower than -90 dBm.

The parameter value can vary with the handover policy.To have UEs handed over only to GSM cells of highquality, the inter-RAT handover decision threshold canbe set to a comparatively large value, for example -85dBm.

GUI Value Range: 0~63

Actual Value Range: lower than -110, -110~-48(Actualvalue meets the condition: Actual Value = GUI Value -111)

Default Value: 16

TimeToTrig2B BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Interval time between the detection of event 2Band sending of measurement report. This parametercorrelates with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change. The emulationresults show that setting this interval can effectivelyreduce the average number of handovers and thenumber of incorrect handovers, preventing unnecessaryhandovers. In addition, the UE at different rates mayreact differently to the same interval. For the fast-movingUE, the call drop rate is more sensitive to this interval,whereas, for the slow-moving UE, the call drop rate isless sensitive to this interval. Therefore, for the cell withmost of the fast-moving UEs, this parameter can be setto a smaller value, whereas for the cell with most of theslow-moving UEs, this parameter can be set to a greatervalue. The value of this parameter can be adjustedaccording to the actual network statistics.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D0

TimeToTrig2D BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Interval time between detection of event 2Dand sending of the measurement report. This parametercorrelates with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The emulation results show that setting this interval can

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effectively reduce the average number of handovers andthe number of incorrect handovers, preventingunnecessary handovers. In addition, the UE at differentrates may react differently to the same interval. For thefast-moving UE, the call drop rate is more sensitive tothis interval, whereas, for the slow-moving UE, the calldrop rate is less sensitive to this interval. Therefore, forthe cell with most of the fast-moving UEs, this parametercan be set to a smaller value, whereas for the cell withmost of the slow-moving UEs, this parameter can be setto a greater value. The value of this parameter can beadjusted according to the actual network statistics.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D320

TimeToTrig2F BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Interval time between detection of event 2Fand sending of the measurement report.This parametercorrelates with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The emulation results show that setting this interval caneffectively reduce the average number of handovers andthe number of incorrect handovers, preventingunnecessary handovers. In addition, the UE at differentrates may react differently to the same interval. For thefast-moving UE, the call drop rate is more sensitive tothis interval, whereas, for the slow-moving UE, the calldrop rate is less sensitive to this interval. Therefore, forthe cell with most of the fast-moving UEs, this parametercan be set to a smaller value, whereas for the cell withmost of the slow-moving UEs, this parameter can be setto a greater value. The value of this parameter can beadjusted according to the actual network statistics.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D1280

TimeToTrigForNonVerify BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Time delay for triggering handovers to GSMcells with non-verified BSIC.

During the period of time specified by this parameter, ifthe signal quality in a neighboring GSM cell fulfills inter-RAT handover criteria and the neighboring GSM cell isnot verified, an inter-RAT handover is triggered. Whenthis parameter value is 65535, the RNC does not performinter-RAT handovers to non-verified GSM cells. If thisparameter is set to a larger value, the average numberof handovers decreases, but call drops may occur.

GUI Value Range: 0~64000, 65535

Actual Value Range: 0~64000, 65535

Default Value: 0

TimeToTrigForPrdInterFreq BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Interval between reception of periodical reportsand triggering of the inter-frequency handover.

Only the inter-frequency cell in which the signal quality isabove a certain threshold in all periodic reports during atime equal to this parameter can be selected as thetarget cell for the inter-frequency handover. If thisparameter is set to a greater value, the probability ofincorrect decision becomes low; however, the handoveralgorithm becomes slow in responding to signal change.The emulation results show that setting this interval caneffectively reduce the average number of handovers andthe number of incorrect handovers, preventingunnecessary handovers. In addition, the UE at different

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rates may react differently to the same interval. For thefast-moving UE, the call drop rate is more sensitive tothis interval, whereas, for the slow-moving UE, the calldrop rate is less sensitive to this interval. Therefore, forthe cell with most of the fast-moving UEs, this parametercan be set to a smaller value, whereas for the cell withmost of the slow-moving UEs, this parameter can be setto a greater value. The value of this parameter can beadjusted according to the actual network statistics.

GUI Value Range: 0~64000

Actual Value Range: 0~64000

Default Value: 0

TimeToTrigForVerify BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Time delay for triggering handovers to GSMcells with verified BSIC.

During the period of time specified by this parameter, ifthe signal quality in a neighboring GSM cell fulfills inter-RAT handover criteria and the neighboring GSM cell isverified, an inter-RAT handover is triggered.

The criterion for triggering inter-RAT handover is asfollows:

Mother_RAT + CIO >= Tother_RAT + H/2

If the quality of the neighboring GSM cell meets thepreceding criterion, the RAN starts the trigger timer. Afterthe timer expires, the RAN makes inter-RAT handoverdecision. The length of the trigger timer is called the timeto trigger verified GSM cell.

This parameter and the hysteresis are used together toprevent incorrect decisions caused by signal jittersduring inter-RAT handover decisions.

Considering that the UE is on the edge of the system,this parameter should be set to a comparatively lowvalue. In situations where a GSM cell is verified, theperformance of the GSM cell is generally regarded asgood. In this case, the parameter can be set to 0, whichindicates that the handover is performed immediately.

If this parameter is set to a larger value, the averagenumber of handovers decreases, but call drops mayoccur.

GUI Value Range: 0~64000

Actual Value Range: 0~64000

Default Value: 0

TrigTime1A BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the interval timebetween detection of event 1A and sending of themeasurement report. The value of this parameter isassociated with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The time-to-trigger mechanism is introduced for thefollowing purposes:

- reducing the number of wrong event reports caused byburst signals,

- preventing the ping-pong handover,

- reducing the impact of shadow fading on eventdecisions.

Setting an appropriate triggering delay effectivelyreduces the average number of handovers and thenumber of wrong handovers, preventing unnecessaryhandovers.

If the handover cannot be triggered in time, the time-to-trigger parameter for event 1A needs to be changed to200 ms or 100 ms, and the delay for event 1B needs tobe changed to 1280 ms or 2560 ms.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,

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160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D320

TrigTime1B BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the interval timebetween detection of event 1B and sending of themeasurement report. The value of this parameter isassociated with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The time-to-trigger mechanism is introduced for thefollowing purposes:

- reducing the number of wrong event reports caused byburst signals,

- preventing the ping-pong handover,

- reducing the impact of shadow fading on eventdecisions.

Setting an appropriate interval time effectively reducesthe average number of handovers and the number ofwrong handovers, preventing unnecessary handovers.

If the handover cannot be triggered in time, the time-to-trigger parameter for event 1A needs to be changed to200 ms or 100 ms, and the delay for event 1B needs tobe changed to 1280 ms or 2560 ms.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D640

TrigTime1C BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the interval timebetween detection of event 1C and sending of themeasurement report. The value of this parameter isassociated with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The time-to-trigger mechanism is introduced for thefollowing purposes:

- reducing the number of wrong event reports caused byburst signals,

- preventing the ping-pong handover,

- reducing the impact of shadow fading on eventdecisions.

Setting an appropriate interval time effectively reducesthe average number of handovers and the number ofwrong handovers, preventing unnecessary handovers.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D640

TrigTime1D BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the interval timebetween detection of event 1D and sending of themeasurement report. The value of this parameter isassociated with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The time-to-trigger mechanism is introduced for thefollowing purposes:

- reducing the number of wrong event reports caused byburst signals,

- preventing the ping-pong handover,

- reducing the impact of shadow fading on event

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decisions.

Setting an appropriate interval time effectively reducesthe average number of handovers and the number ofwrong handovers, preventing unnecessary handovers.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D640

TrigTime1F BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the interval timebetween detection of event 1F and sending of themeasurement report. The value of this parameter isassociated with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The time-to-trigger mechanism is introduced for thefollowing purposes:

- reducing the number of wrong event reports caused byburst signals,

- preventing the ping-pong handover,

- reducing the impact of shadow fading on eventdecisions.

Setting an appropriate interval time effectively reducesthe average number of handovers and the number ofwrong handovers, preventing unnecessary handovers.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D640

TrigTime1J BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: This parameter specifies the interval timebetween detection of event 1J and sending of themeasurement report. The value of this parameter isassociated with slow fading. If this parameter is set to agreater value, the probability of incorrect decisionbecomes low; however, the handover algorithm becomesslow in responding to signal change.

The time-to-trigger mechanism is introduced for thefollowing purposes:

- reducing the number of wrong event reports caused byburst signals,

- preventing the ping-pong handover,

- reducing the impact of shadow fading on eventdecisions.

Setting an appropriate interval time effectively reducesthe average number of handovers and the number ofwrong handovers, preventing unnecessary handovers.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D640

TrigTime2C BSC6900ADDUCELLINTERFREQHONCOV(Optional)

MODUCELLINTERFREQHONCOV(Optional)

Meaning: Interval time between detection of event 2Cand sending of the measurement report.

The value of this parameter is associated with slowfading. If this parameter is set to a greater value, theprobability of incorrect decision becomes low; however,the handover algorithm becomes slow in responding tosignal change.

The emulation results show that setting this interval can

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effectively reduce the average number of handovers andthe number of incorrect handovers, preventingunnecessary handovers. In addition, the UE at differentrates may react differently to the same interval. For thefast-moving UE, the call drop rate is more sensitive tothis interval, whereas, for the slow-moving UE, the calldrop rate is less sensitive to this interval. Therefore, forthe cell with most of the fast-moving UEs, this parametercan be set to a smaller value, whereas for the cell withmost of the slow-moving UEs, this parameter can be setto a greater value. The value of this parameter can beadjusted according to the actual network statistics.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D640

TrigTime3A BSC6900ADDUCELLINTERRATHOCOV(Optional)

MODUCELLINTERRATHOCOV(Optional)

Meaning: Interval time between detection of event 3Aand sending of the measurement report.

The value of this parameter is associated with the slowfading. If this parameter is set to a greater value, theprobability of incorrect handover decision becomes low;however, the handover algorithm becomes slow inresponding to signal change. If this parameter is set to asmaller value, the handover algorithm becomes fast inresponding to signal change; however, the probability ofincorrect decision becomes high.

The emulation result shows that the hysteresis settingcan effectively reduce the average number of handoversand the number of incorrect handovers, thus preventingunnecessary handovers. The emulation result alsoshows that the UE at different data rates may reactdifferently to the delay for triggering the event. For thefast-moving UE, the call drop rate is more sensitive to thedelay, whereas, for the slow-moving UE, the call droprate is less sensitive to the delay. This can also reduceping-pong handovers and incorrect handovers.Therefore, for the cell where most UEs are in fastmovement, this parameter can be set to a smaller value,whereas for the cell where most UEs are in slowmovement, this parameter can be set to a greater value.The value of this parameter can be adjusted accordingto the actual network statistics.

The inter-frequency measurement reporting period is480 ms. Therefore, the trigger delay time shorter than480 ms is invalid.

If the parameter is set to a larger value, handover isunlikely to be triggered. However, call drops mayincrease as the parameter value increases.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D0

TrigTime3C BSC6900ADDUCELLINTERRATHONCOV(Optional)

MODUCELLINTERRATHONCOV(Optional)

Meaning: Interval time between detection of event 3Cand sending of the measurement report.

The value of this parameter is associated with the slowfading. If this parameter is set to a greater value, theprobability of incorrect handover decision becomes low;however, the handover algorithm becomes slow inresponding to signal change. If this parameter is set to asmaller value, the handover algorithm becomes fast inresponding to signal change; however, the probability ofincorrect decision becomes high.

The emulation result shows that the hysteresis settingcan effectively reduce the average number of handoversand the number of incorrect handovers, thus preventingunnecessary handovers. The emulation result also

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shows that the UE at different data rates may reactdifferently to the delay for triggering the event. For thefast-moving UE, the call drop rate is more sensitive to thedelay, whereas, for the slow-moving UE, the call droprate is less sensitive to the delay. This can also reduceping-pong handovers and incorrect handovers.Therefore, for the cell where most UEs are in fastmovement, this parameter can be set to a smaller value,whereas for the cell where most UEs are in slowmovement, this parameter can be set to a greater value.The value of this parameter can be adjusted accordingto the actual network statistics.

The inter-frequency measurement reporting period is480 ms. Therefore, the trigger delay time shorter than480 ms is invalid.

If the parameter is set to a larger value, handover isunlikely to be triggered. However, call drops mayincrease as the parameter value increases.

GUI Value Range: D0, D10, D20, D40, D60, D80, D100,D120, D160, D200, D240, D320, D640, D1280, D2560,D5000

Actual Value Range: 0, 10, 20, 40, 60, 80, 100, 120,160, 200, 240, 320, 640, 1280, 2560, 5000

Default Value: D640

ULQosMcTimerLen BSC6900MOD UCELLQOSHO(Optional)

ADD UCELLQOSHO(Optional)

Meaning: Timer length for uplink QoS measurement.

This parameter controls the time lengths for the inter-frequency and inter-RAT measurement based on Qos.

After inter-frequency or inter-RAT measurement starts, ifno inter-frequency handover is performed when thistimer expires, the measurement is stopped, and thecompressed mode is deactivated, if any. If this parameteris set to 0, this indicates that the timer will not be started.

For the inter-frequency or inter-RAT measurementbased on coverage, the compressed mode can bestopped through reporting event 2F. For measurementthat is not based on coverage, event 2F is not reported,and the timer must be set but should not be set to 0.

As for the impact on network performance:

It reduces the influence of long time compressed mode tothe serving cell.

The compressed mode may be stopped ahead of time,which can cause the result that the UE fails to initiateinter-frequency or inter-RAT handover, and thus canlead to call drops.

GUI Value Range: 0~512

Actual Value Range: 0~512

Default Value: 20

UlSFTurnPoint BSC6900ADD UCELLCMCF(Optional)

MOD UCELLCMCF(Optional)

Meaning: Uplink CM implementation mode selectionthreshold.

When the uplink spreading factor is greater than orequal to the value of this parameter, the SF/2 mode ispreferred. Otherwise, the high-layer scheduling mode ispreferred.

The SF/2 mode consumes more system resources andtherefore this mode is recommended only for low-rateusers. The high-layer scheduling mode requires variablemultiplexing positions of transport channels and isapplicable to a relatively narrow range. In addition, thisapproach affects the transmission rate of users.Therefore, this mode is recommended only when theSF/2 approach is unavailable or there are high-rateusers.

GUI Value Range: D8, D16, D32, D64, D128, D256

Actual Value Range: 8, 16, 32, 64, 128, 256

Default Value: D64

UseOfHcs BSC6900ADD UCELLHCS(Optional) Meaning: Indicating whether HCS is used. For details,refer to 3GPP TS 25.304.

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MOD UCELLHCS(Optional) GUI Value Range: USED, NOT_USED

Actual Value Range: USED, NOT_USED

Default Value: NOT_USED

UsedFreqCSThdEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of used frequency quality fortriggering inter-frequency measurement based onmeasurement quantity of Ec/No for CS services.For CSservices, if the value of "Inter-frequency MeasurementReport Mode" is set to EVENT_TRIGGER, this parameteris used to set the measurement control of event 2B. Oneof the necessary conditions for triggering event 2B canbe met only when the quality of the uesd frequency issmaller than this threshold. In addition, event 2B istriggered only when both the necessary conditions aremet.

After handover, even if the inter-frequency measurementis triggered again, it is very difficult to hand over the UEagain to the cell of currently used frequency. That is, thisparameter is usually set smaller than the start thresholdfor event 2F or equal to the threshold of event 2D.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

UsedFreqCSThdRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of used frequency quality fortriggering inter-frequency measurement based onmeasurement quantity of RSCP for CS services.For CSservices, if the value of "Inter-frequency MeasurementReport Mode" is set to EVENT_TRIGGER, this parameteris used to set the measurement control of event 2B. Oneof the necessary conditions for triggering event 2B canbe met only when the quality of the used frequency issmaller than this threshold. In addition, event 2B istriggered only when both the necessary conditions aremet.

After handover, even if the inter-frequency measurementis triggered again, it is very difficult to hand over the UEagain to the cell of currently used frequency. That is, thisparameter is usually set smaller than the start thresholdfor event 2F or equal to the threshold of event 2D.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

UsedFreqHThdEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of used frequency quality fortriggering inter-frequency measurement based onmeasurement quantity of Ec/No for HSPA services.ForHSPA services, if the value of "Inter-frequencyMeasurement Report Mode" is set to EVENT_TRIGGER,this parameter is used to set the measurement control ofevent 2B. One of the necessary conditions for triggeringevent 2B can be met only when the quality of the usedfrequency is smaller than this threshold. In addition,event 2B is triggered only when both the necessaryconditions are met.

After handover, even if the inter-frequency measurementis triggered again, it is very difficult to hand over the UEagain to the cell of currently used frequency. That is, thisparameter is usually set smaller than the start thresholdfor event 2F or equal to the threshold of event 2D.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

UsedFreqHThdRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of used frequency quality fortriggering inter-frequency measurement based onmeasurement quantity of RSCP for HSPA services.ForHSPA services, if the value of "Inter-frequencyMeasurement Report Mode" is set to EVENT_TRIGGER,this parameter is used to set the measurement control ofevent 2B. One of the necessary conditions for triggering

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event 2B can be met only when the quality of the usedfrequency is smaller than this threshold. In addition,event 2B is triggered only when both the necessaryconditions are met.

After handover, even if the inter-frequency measurementis triggered again, it is very difficult to hand over the UEagain to the cell of currently used frequency. That is, thisparameter is usually set smaller than the start thresholdfor event 2F or equal to the threshold of event 2D.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

UsedFreqMeasQuantityForQos3ABSC6900MOD UCELLQOSHO(Optional)

ADD UCELLQOSHO(Optional)

Meaning: This parameter configures the used frequencymeasurement quantity to trigger the inter-RATmeasurement for the purpose of QoS-based handover.The parameter is valid when the event reporting mode isselected for inter-RAT.

Ec/No: signal-to-noise ratio

RSCP: received signal code power

CPICH_Ec/NO: the measurement quantity used for event2D and 2F, with unit of dB

CPICH_RSCP: the measurement quantity used for event2D and 2F, with unit of dBm

The RNC, in the coverage-based inter-RATmeasurement, may configure that the inter-RATmeasurement quantity are delivered according to event2D that triggers the measurement, which causes theresult that the QoS-based inter-RAT measurementcannot refer to the coverage-based configurations.Under this condition, it is necessary for the QoS-basedinter-RAT measurement to set the used frequencyseparately. When both the QoS-based and thecoverage-based inter-RAT measurements exist, refer tothis parameter.

As for the impact on network performance:

When the UE moves to the cell border, and there is aintra-frequency neighboring cell in the moving direction,CPCICH Ec/No varies faster than RSCP and the qualityof the current cell should be evaluated according toCPCICH Ec/No. When there is no intra-frequencyneighboring cell in the direction, CPCICH RSCP variesfaster than Ec/No and the quality should be evaluatedaccording to CPCICH RSCP. If the measurement quantityis not properly selected, the handover may not beperformed timely, thus resulting in call drops.

GUI Value Range: CPICH_EC/NO, CPICH_RSCP

Actual Value Range: CPICH_EC/NO, CPICH_RSCP

Default Value: CPICH_RSCP

UsedFreqR99PsThdEcN0 BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of used frequency quality fortriggering inter-frequency measurement based onmeasurement quantity of Ec/No for non-HSPA services inPS domain.For non-HSPA services in PS domain, if thevalue of "Inter-frequency Measurement Report Mode" isset to EVENT_TRIGGER, this parameter is used to setthe measurement control of event 2B. One of thenecessary conditions for triggering event 2B can be metonly when the quality of the used frequency is smallerthan this threshold. In addition, event 2B is triggered onlywhen both the necessary conditions are met.

After handover, even if the inter-frequency measurementis triggered again, it is very difficult to hand over the UEagain to the cell of currently used frequency. That is, thisparameter is usually set smaller than the start thresholdfor event 2F or equal to the threshold of event 2D.

GUI Value Range: -24~0

Actual Value Range: -24~0

Default Value: -12

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UsedFreqR99PsThdRSCP BSC6900ADDUCELLINTERFREQHOCOV(Optional)

MODUCELLINTERFREQHOCOV(Optional)

Meaning: Threshold of used frequency quality fortriggering inter-frequency measurement based onmeasurement quantity of RSCP for non-HSPA services inPS domain.For non-HSPA services in PS domain, if thevalue of "Inter-frequency Measurement Report Mode" isset to EVENT_TRIGGER, this parameter is used to setthe measurement control of event 2B. One of thenecessary conditions for triggering event 2B can be metonly when the quality of the used frequency is smallerthan this threshold. In addition, event 2B is triggered onlywhen both the necessary conditions are met.

After handover, even if the inter-frequency measurementis triggered again, it is very difficult to hand over the UEagain to the cell of currently used frequency. That is, thisparameter is usually set smaller than the start thresholdfor event 2F or equal to the threshold of event 2D.

GUI Value Range: -115~-25

Actual Value Range: -115~-25

Default Value: -92

Weight BSC6900ADD UCELLINTRAFREQHO(Optional)

MOD UCELLINTRAFREQHO(Optional)

Meaning: Used for calculating the relative threshold ofthe soft handover based on the measurement report ofeach cell in the active set. If this parameter is set to agreater value, the relative threshold of the soft handoveris greater with the other conditions unchanged. Fordetailed information of this parameter, refer to 3GPP TS25.133. When this parameter is set to 0, the generalquality of the active set is the quality of the best cell. Inthis case, the relative threshold of soft handoverdepends on the related measurement values of the bestcell in the active set. When this parameter is set to 1, therelative threshold of the soft handover depends on theequivalent signal strength obtained when maximum ratiocombining is performed in the downlink of all cells in theactive set.

GUI Value Range: 0~20

Actual Value Range: 0~2, step:0.1

Default Value: 0

14 Counters

Table 14-1 Counter description

CounterID

Counter Name CounterDescription

FeatureID

FeatureName

67175266VS.SHO.Att.RNC Number of SoftHandovers Initiatedby RNC for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67175267VS.SHO.Succ.RNC Number ofSuccessful SoftHandovers Initiatedby RNC for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67175268VS.SoHO.Att.RNC Number of SofterHandovers Initiatedby RNC for RNC

WRFD-020201

WRFD-020202

Intra Node BSofterHandover

Intra RNCSoftHandover

67175269VS.SoHO.Succ.RNC Number ofSuccessful Softer

WRFD-020201

Intra Node BSofter

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Handovers Initiatedby RNC for RNC

WRFD-020202

Handover

Intra RNCSoftHandover

67175283VS.SHO.Drop.RNC Number of CallDrops Due to SoftHandover Failuresfor RNC

WRFD-020202

WRFD-020201

WRFD-020203

Intra RNCSoftHandover

Intra Node BSofterHandover

Inter RNCSoftHandover

67175428VS.HHO.AttInterFreq.RNC Number of Inter-Frequency HardHandoverRequests for RNC

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67175429VS.HHO.SuccInterFreq.RNC Number ofSuccessful Inter-Frequency HardHandovers for RNC

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67175945VS.IRATHO.AttOutCS.RNC Number of CSOutgoing Inter-RAT HandoverAttempts for RNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67176008VS.IRATHO.AttInCS.RNC Number of CSIncoming Inter-RATHandover Attemptsfor RNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67176098VS.IRATHO.AttOutPSUTRAN.RNC Number of PSOutgoing Inter-RAT HandoverAttempts Initiatedby RNC for RNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased on

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Service

Inter-RATHandoverBased onLoad

67176100VS.IRATHO.SuccOutPSUTRAN.RNC Number ofSuccessful PSOutgoing Inter-RAT HandoversInitiated by RNC forRNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67176102VS.IRATHO.SuccOutPSUE.RNC Number ofSuccessful PSOutgoing Inter-RAT HandoversInitiated by UE forRNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67179009VS.SHO.ErrIndIur.Rx Number of ErrorIndicationMessagesReceived on IurInterface for DRNC

WRFD-020203

Inter RNCSoftHandover

67179010VS.SHO.ErrIndIur.Tx Number of ErrorIndicationMessages Sent onIur Interface forDRNC

WRFD-020203

Inter RNCSoftHandover

67179025VS.SHO.AttRLSetupIur.Tx Number of RadioLink SetupRequests on IurInterface fromSRNC

WRFD-020203

Inter RNCSoftHandover

67179026VS.SHO.SuccRLSetupIur.Rx Number of RadioLinks SuccessfullySet Up on the IurInterface for SRNC

WRFD-020203

Inter RNCSoftHandover

67179028VS.SHO.FailRLSetupIur.HW.Rx Number of RadioLink Setup Failureson Iur Interface forSRNC (DeviceFault)

WRFD-020203

Inter RNCSoftHandover

67179029VS.SHO.FailRLSetupIur.Cong.Rx Number of RadioLink Setup Failureson Iur Interface forSRNC(Congestion)

WRFD-020203

Inter RNCSoftHandover

67179030VS.SHO.FailRLSetupIur.CfgUnsupp.Rx Number of RadioLink Setup Failureson Iur Interface forSRNC(ConfigurationUnsupported)

WRFD-020203

Inter RNCSoftHandover

67179032VS.SHO.AttRLDelIur.Tx Number of Radio WRFD- Inter RNC

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Links Deleted onIur Interface forSRNC

020203 SoftHandover

67179033VS.SHO.SuccRLDelIur.Rx Number ofSuccessful deletedRadio Links on IurInterface for SRNC

WRFD-020203

Inter RNCSoftHandover

67179035VS.SHO.AttRLAddIur.Tx Number of RadioLink AdditionRequests on IurInterface fromSRNC

WRFD-020203

Inter RNCSoftHandover

67179036VS.SHO.SuccRLAddIur.Rx Number ofSuccessful RadioLink Additions onIur Interface forSRNC

WRFD-020203

Inter RNCSoftHandover

67179038VS.SHO.FailRLAddIur.HW.Rx Number of FailedRadio LinkAdditions on IurInterface for SRNC(Device Fault)

WRFD-020203

Inter RNCSoftHandover

67179039VS.SHO.FailRLAddIur.Cong.Rx Number of FailedRadio LinkAdditions on IurInterface for SRNC(Congestion)

WRFD-020203

Inter RNCSoftHandover

67179040VS.SHO.FailRLAddIur.CfgUnsupp.Rx Number of FailedRadio LinkAdditions on IurInterface for SRNC(ConfigurationUnsupported)

WRFD-020203

Inter RNCSoftHandover

67179042VS.SHO.AttRLRecfgIur.Tx Number of RadioLinkReconfigurationRequests on IurInterface fromSRNC

WRFD-020203

Inter RNCSoftHandover

67179043VS.SHO.SuccRLRecfgIur.Rx Number ofSuccessful RadioLinkReconfigurationson Iur Interface forSRNC

WRFD-020203

Inter RNCSoftHandover

67179045VS.SHO.FailRLRecfgIur.HW.Rx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forSRNC (DeviceFault)

WRFD-020203

Inter RNCSoftHandover

67179046VS.SHO.FailRLRecfgIur.Cong.Rx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forSRNC(Congestion)

WRFD-020203

Inter RNCSoftHandover

67179047VS.SHO.FailRLRecfgIur.CfgUnsupp.Rx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forSRNC(ConfigurationUnsupported)

WRFD-020203

Inter RNCSoftHandover

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67179048VS.SHO.FailRLRecfgIur.NoReply Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forSRNC (NoResponse)

WRFD-020203

Inter RNCSoftHandover

67179050VS.SHO.CancelRLRecfgIur.Tx Number of RadioLink SynchronousReconfigurationCancellations onIur Interface forSRNC

WRFD-020203

Inter RNCSoftHandover

67179051VS.SHO.RLFailIndIur.Rx Number of RadioLink Failures on IurInterface for SRNC

WRFD-020203

Inter RNCSoftHandover

67179053VS.SHO.RLFailIur.HW.Rx Number of RadioLink Failures on IurInterface for SRNC(Device Fault)

WRFD-020203

Inter RNCSoftHandover

67179054VS.SHO.RLFailIur.SyncFail.Rx Number of RadioLink Failures on IurInterface for SRNC(SynchronizationFailure)

WRFD-020203

Inter RNCSoftHandover

67179055VS.SHO.RLFailIur.CfgUnsup.Rx Number of RadioLink Failures on IurInterface for SRNC(ConfigurationUnsupported)

WRFD-020203

Inter RNCSoftHandover

67179056VS.SHO.RLRestoreIur.Rx Number of RadioLink Restorationson Iur Interface forSRNC

WRFD-020203

Inter RNCSoftHandover

67179061VS.SHO.Att.Iur Number of SoftHandovers Initiatedby SRNC on IurInterface

WRFD-020203

Inter RNCSoftHandover

67179062VS.SHO.Succ.Iur Number ofSuccessful SoftHandovers Initiatedby SRNC on IurInterface

WRFD-020203

Inter RNCSoftHandover

67179089VS.SHO.AttRLSetupIur.Rx Number of RadioLink SetupRequests on IurInterface for DRNC

WRFD-020203

Inter RNCSoftHandover

67179090VS.SHO.SuccRLSetupIur.Tx Number ofSuccessful RadioLink Setups on IurInterface for DRNC

WRFD-020203

Inter RNCSoftHandover

67179092VS.SHO.FailRLSetupIur.HW.Tx Number of FailedRadio Link Setupson Iur Interface forDRNC (DeviceFault)

WRFD-020203

Inter RNCSoftHandover

67179093VS.SHO.FailRLSetupIur.CongTx Number of FailedRadio Link Setupson Iur Interface forDRNC(Congestion)

WRFD-020203

Inter RNCSoftHandover

67179094VS.SHO.FailRLSetupIur.CfgUTx Number of FailedRadio Link Setupson Iur Interface forDRNC

WRFD-020203

Inter RNCSoftHandover

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(ConfigurationUnsupported)

67179096VS.SHO.AttRLDelIur.Rx Number of RadioLink DeletionRequests on IurInterface for DRNC

WRFD-020203

Inter RNCSoftHandover

67179097VS.SHO.SuccRLDelIur.Tx Number ofSuccessful RadioLink Deletions onIur Interface forDRNC

WRFD-020203

Inter RNCSoftHandover

67179098VS.SHO.AttRLAddIur.Rx Number of RadioLink AdditionRequests on IurInterface for DRNC

WRFD-020203

Inter RNCSoftHandover

67179099VS.SHO.SuccRLAddIur.Tx Number ofSuccessful RadioLink Additions onIur Interface forDRNC

WRFD-020203

Inter RNCSoftHandover

67179100VS.SHO.FailRLAddIur.OM.Tx Number of FailedRadio LinkAdditions on IurInterface for DRNC(OM Intervention)

WRFD-020203

Inter RNCSoftHandover

67179101VS.SHO.FailRLAddIur.HW.Tx Number of FailedRadio LinkAdditions on IurInterface for DRNC(Device Fault)

WRFD-020203

Inter RNCSoftHandover

67179102VS.SHO.FailRLAddIur.Cong.Tx Number of FailedRadio LinkAdditions on IurInterface for DRNC(Congestion)

WRFD-020203

Inter RNCSoftHandover

67179103VS.SHO.FailRLAddIur.CfgUnsTx Number of FailedRadio LinkAdditions on IurInterface for DRNC(ConfigurationUnsupported)

WRFD-020203

Inter RNCSoftHandover

67179105VS.SHO.AttRLRecfgIur.Rx Number of RadioLink SynchronousReconfigurationRequests on IurInterface for DRNC

WRFD-020203

Inter RNCSoftHandover

67179106VS.SHO.SuccRLRecfgIur.Tx Number ofSuccessful RadioLink SynchronousReconfigurationson Iur Interface forDRNC

WRFD-020203

Inter RNCSoftHandover

67179107VS.SHO.FailRLRecfgIur.OM.Tx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forDRNC (OMIntervention)

WRFD-020203

Inter RNCSoftHandover

67179108VS.SHO.FailRLRecfgIur.HW.Tx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forDRNC (DeviceFault)

WRFD-020203

Inter RNCSoftHandover

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67179109VS.SHO.FailRLRecfgIur.CongTx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forDRNC(Congestion)

WRFD-020203

Inter RNCSoftHandover

67179110VS.SHO.FailRLRecfgIur.CfgUTx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forDRNC(ConfigurationUnsupported)

WRFD-020203

Inter RNCSoftHandover

67179112VS.SHO.CancelRLRecfgIur.Rx Number of RadioLink SynchronousReconfigurationCancellations onIur Interface forDRNC

WRFD-020203

Inter RNCSoftHandover

67179113VS.SHO.RLFail.Tx Number of RadioLink Failures on IurInterface for DRNC

WRFD-020203

Inter RNCSoftHandover

67179114VS.SHO.RLFail.OM.Tx Number of RadioLink Failures on IurInterface for DRNC(OM Intervention)

WRFD-020203

Inter RNCSoftHandover

67179115VS.SHO.RLFail.HW.Tx Number of RadioLink Failures on IurInterface for DRNC(Device Fault)

WRFD-020203

Inter RNCSoftHandover

67179116VS.SHO.RLFail.SyncFail.Tx Number of RadioLink Failures on IurInterface for DRNC(SynchronizationFailure)

WRFD-020203

Inter RNCSoftHandover

67179117VS.SHO.RLFail.CfgUnsup.Tx Number of RadioLink Failures on IurInterface for DRNC(ConfigurationUnsupported)

WRFD-020203

Inter RNCSoftHandover

67179118VS.SHO.RLRestore.Tx Number of RadioLink Restorationson Iur Interface forDRNC

WRFD-020203

Inter RNCSoftHandover

67180498VS.SHO.AttRLAdd Number of RadioLink AdditionAttempts in SoftHandover for Cell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180499VS.SHO.SuccRLAdd Number ofSuccessful RadioLink Additions inSoft Handover forCell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180500VS.SHO.FailRLAdd.CfgUnsupp Number of FailedRadio LinkAdditions in SoftHandover for Cell(ConfigurationUnsupported)

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180501VS.SHO.FailRLAdd.ISR Number of FailedRadio Link

WRFD-020202

Intra RNCSoft

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Additions in SoftHandover for Cell(IncompatibleSimultaneousReconfiguration)

WRFD-020201

Handover

Intra Node BSofterHandover

67180503VS.SHO.FailRLAdd.InvCfg Number of FailedRadio LinkAdditions in SoftHandover for Cell(InvalidConfiguration)

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180504VS.SHO.FailRLAdd.NoReply Number of FailedRadio LinkAdditions in SoftHandover due toUE No Responsefor Cell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180508VS.SHO.AttRLDel Number of RadioLink DeletionAttempts in SoftHandover for Cell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180509VS.SHO.SuccRLDel Number ofSuccessful RadioLink Deletions inSoft Handover forCell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180519VS.SHO.AMR.Att Number of SoftHandover Attemptsfor Cell (AMR)

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180520VS.SHO.AMR.Succ Number ofSuccessful SoftHandovers in CSDomain for Cell(AMR Service)

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180521VS.SHO.CS64.Att Number of SoftHandover Attemptsin CS Domain forCell (64 kbit/sConversationalService)

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180522VS.SHO.CS64.Succ Number ofSuccessful SoftHandovers in CSDomain for Cell (64kbit/sConversationalService)

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67180551VS.HHO.InterFreqOut.Eval.CM Number ofDecisions forOutgoing Inter-Frequency HardHandovers inCompressed Modefor Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

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67180565VS.HHO.AttIn Number ofIncoming HardHandover Attemptsfor Cell

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67180566VS.HHO.SuccIn Number ofSuccessfulIncoming HardHandovers in theRNC for Cell

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67180570VS.HHO.InterFreqIn.Eval.CM Number ofDecisions forIncoming Inter-Frequency HardHandovers inCompressed Modefor Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67180585VS.HHO.AttIntraFreqOut.IntraNodeB Number ofOutgoing Intra-Frequency HardHandover Attemptsin NodeB for Cell

WRFD-020301

IntraFrequencyHardHandover

67180586VS.HHO.SuccIntraFreqOut.IntraNodeB Number ofSuccessfulOutgoing Intra-Frequency HardHandovers inNodeB for Cell

WRFD-020301

IntraFrequencyHardHandover

67180587VS.HHO.AttIntraFreqOut.InterNodeBIntraRNC Number ofOutgoing Intra-Frequency HardHandover AttemptsBetween DifferentNodeBs of RNC forCell

WRFD-020301

IntraFrequencyHardHandover

67180588VS.HHO.SuccIntraFreqOut.InterNodeBIntraRNC Number ofSuccessfulOutgoing Intra-Frequency HardHandoversBetween DifferentNodeBs of RNC for

WRFD-020301

IntraFrequencyHardHandover

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Cell

67180589VS.HHO.AttIntraFreqOut.InterRNC Number ofOutgoing Intra-Frequency HardHandover AttemptsBetween RNCs forCell

WRFD-020301

IntraFrequencyHardHandover

67180590VS.HHO.SuccIntraFreqOut.InterRNC Number ofSuccessfulOutgoing Intra-Frequency HardHandoversBetween RNCs forCell

WRFD-020301

IntraFrequencyHardHandover

67180609VS.RRC.MrRpt.1A Number of Event1A MeasurementReports for Cell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67180610VS.RRC.MrRpt.1B Number of Event1B MeasurementReports for Cell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67180611VS.RRC.MrRpt.1C Number of Event1C MeasurementReports for Cell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67180612VS.RRC.MrRpt.1D Number of Event1D MeasurementReports for Cell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67180613VS.RRC.MrRpt.2D Number of Event2D MeasurementReports for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67180614VS.RRC.MrRpt.2F Number of Event2F MeasurementReports for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67180675VS.DCCC.Succ.F2D Number ofSuccessfulChannelConversions from

WRFD-021101

WRFD-020202

DynamicChannelConfigurationControl

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FACH to DCH forCell

(DCCC)

Intra RNCSoftHandover

67180676VS.DCCC.Succ.D2F Number ofSuccessfulChannelConversions fromDCHs to FACHs forCell

WRFD-021101

WRFD-020202

DynamicChannelConfigurationControl(DCCC)

Intra RNCSoftHandover

67183489VS.HHO.AttOut.NCell Number of HardHandoversAttempts BetweenNeighboring Cells

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183490VS.HHO.SuccOut.NCell Number ofSuccessful HardHandoversBetweenNeighboring Cells

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183491VS.SHO.AddRLAtt.NCell Number of RLAddition Attemptsin Soft HandoverBetweenNeighboring Cells

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67183492VS.SHO.AddRLSucc.NCell Number ofSuccessful RLAdditions in SoftHandover BetweenNeighboring Cells

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67183493VS.SHO.DelRLAtt.NCell Number of RLDeletion Attemptsin Soft HandoverBetweenNeighboring Cells

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67183494VS.SHO.DelRLSucc.NCell Number ofSuccessful RLDeletions in SoftHandover BetweenNeighboring Cells

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofter

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SofterHandover

67183495VS.IRATHO.AttOutCS.GCell Number of CSInter-RATOutgoingHandover AttemptsBetweenNeighboring Cells

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67183496VS.IRATHO.SuccOutCS.GCell Number ofSuccessful CSInter-RATOutgoingHandoversBetweenNeighboring Cells

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67183497VS.IRATHO.AttOutPSUTRAN.GCell Number of PSInter-RATOutgoingHandover AttemptsBetweenNeighboring Cells

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67183498VS.IRATHO.SuccOutPSUTRAN.GCell Number ofSuccessful PSInter-RATOutgoingHandoversBetweenNeighboring Cells

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67183900VS.HHO.AttInterFreqOut Number ofOutgoing Inter-Frequency HardHandover Attemptsfor Cell

WRFD-020302

WRFD-020304

WRFD-020106

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

LoadReshuffling

67183901VS.HHO.SuccInterFreqOut Number ofSuccessfulOutgoing Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased on

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WRFD-020106

Coverage

InterFrequencyHardHandoverBased on DLQoS

LoadReshuffling

67183902VS.HHO.FailInterFreqOut.CfgUnsupp Number of FailedOutgoing Inter-Frequency HardHandovers for Cell(ConfigurationUnsupported)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183903VS.HHO.FailInterFreqOut.PyhChFail Number of FailedOutgoing Inter-Frequency HardHandovers for Cell(Physical ChannelFailure)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183904VS.HHO.FailInterFreqOut.ISR Number of FailedOutgoing Inter-Frequency HardHandovers for Cell(IncompatibleSimultaneousReconfiguration)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183906VS.HHO.FailInterFreqOut.CellUpdt Number of FailedOutgoing Inter-Frequency HardHandovers for Cell(Cell UpdateOccurred)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183907VS.HHO.FailInterFreqOut.InvCfg Number of FailedOutgoing Inter-Frequency HardHandovers for Cell(InvalidConfiguration)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DL

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QoS

67183908VS.HHO.FailInterFreqOut.NoReply Number of FailedOutgoing Inter-Frequency HardHandovers Due toNo Response fromthe UE for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183912VS.HHO.AttInterFreqIn Number ofIncoming Inter-Frequency HardHandover Attemptsfor Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183913VS.HHO.SuccInterFreqIn Number ofSuccessfulIncoming Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67183926VS.HHO.IntraFreqOut.Drop Number of CallDrops Due toFailed OutgoingIntra-FrequencyHard Handoversfor Cell

WRFD-020301

IntraFrequencyHardHandover

67189701VS.HHO.FailIntraFreqOut.InterRNC.CfgUnsupp Number of FailedOutgoing Intra-Frequency HardHandoversBetween RNCs forCell (ConfigurationUnsupported)

WRFD-020301

IntraFrequencyHardHandover

67189702VS.HHO.FailIntraFreqOut.InterRNC.PhyChFail Number of FailedOutgoing Intra-Frequency HardHandoversBetween RNCs forCell (PhysicalChannel Failure)

WRFD-020301

IntraFrequencyHardHandover

67189703VS.HHO.FailIntraFreqOut.InterRNC.ISR Number of FailedOutgoing Intra-Frequency HardHandoversBetween RNCs forCell (IncompatibleSimultaneousReconfiguration)

WRFD-020301

IntraFrequencyHardHandover

67189704VS.HHO.FailIntraFreqOut.InterRNC.InvCfg Number of FailedOutgoing Intra-Frequency Hard

WRFD-020301

IntraFrequencyHard

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HandoversBetween RNCs forCell (InvalidConfiguration)

Handover

67189722VS.HHO.EvalOut Number ofDecisions forOutgoing HardHandovers for Cell

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67189723VS.HHO.EvalIn Number ofDecisions forIncoming HardHandovers for Cell

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67189739VS.IRATHO.AttRelocPrepOutCS.Load Number ofPreparationAttempts for CSOutgoing Inter-RAT HandoverInitiated by UTRANBased on Load forCell

WRFD-020306

Inter-RATHandoverBased onLoad

67189740VS.IRATHO.SuccRelocPrepOutCS.Load Number ofSuccessfulPreparations forCS Outgoing Inter-RAT HandoverInitiated by UTRANBased on Load forCell

WRFD-020306

Inter-RATHandoverBased onLoad

67189741VS.IRATHO.SuccOutCS.Load Number ofSuccessful CSOutgoing Inter-RAT HandoversBased on Load forCell

WRFD-020306

Inter-RATHandoverBased onLoad

67189742VS.IRATHO.AttOutPSUTRAN.Load Number of PSOutgoing Inter-RAT HandoverAttempts Initiatedby UTRAN Basedon Load for Cell

WRFD-020306

Inter-RATHandoverBased onLoad

67189743VS.IRATHO.SuccOutPSUTRAN.Load Number ofSuccessful PSOutgoing Inter-RAT HandoversInitiated by UTRAN

WRFD-020306

Inter-RATHandoverBased onLoad

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Based on Load forCell

67189749IRATHO.AttRelocPrepOutCS Number ofPreparationAttempts for CSOutgoing Inter-RAT Handover forCell

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189750IRATHO.SuccRelocPrepOutCS Number ofSuccessfulPreparations forCS Outgoing Inter-RAT Handover forCell

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189751IRATHO.FailRelocPrepOutCS.TAlExp Number of FailedPreparations forCS Outgoing Inter-RAT Handover forCell (TRELOCallocexpiry)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189752IRATHO.FailRelocPrepOutCS.TgtFail Number of FailedPreparations forCS Outgoing Inter-RAT Handover forCell (RelocationFailure in TargetCN/RNC or TargetSystem)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189753IRATHO.FailRelocPrepOutCS.ReloNoSup Number of FailedPreparations forCS Outgoing Inter-RAT Handover forCell (Relocationnot supported inTarget RNC orTarget system)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased on

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Service

Inter-RATHandoverBased onLoad

67189754IRATHO.AttOutCS Number of CSOutgoing Inter-RAT HandoverAttempts

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189755IRATHO.SuccOutCS Number ofSuccessful CSOutgoing Inter-RAT Handovers forCell

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189756IRATHO.FailOutCS.CfgUnsupp Number of FailedCS Outgoing Inter-RAT Handovers forCell (ConfigurationUnsupported)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189757IRATHO.FailOutCS.PhyChFail Number of FailedCS Outgoing Inter-RAT Handovers forCell (PhysicalChannel Failure)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189758VS.IRATHO.AttRelocPrepInCS Number ofPreparations forCS Incoming Inter-RAT Handover forCell

WRFD-02040002

WRFD-020303

WRFD-

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

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020305

WRFD-020306

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189759VS.IRATHO.SuccInCS Number ofSuccessful CSIncoming Inter-RATHandovers for Cell

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189760VS.IRATHO.FailRelocPrepInCS.TRNCSysFailReloc Number of FailedPreparations forCS Incoming Inter-RAT Handover(Relocation failurein target CN/RNCor target system)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189761VS.IRATHO.FailRelocPrepInCS.TRNCSysRelocUnsupp Number of FailedPreparations forCS Incoming Inter-RAT Handover(Relocation notsupported in targetRNC or targetsystem)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189762VS.IRATHO.FailRelocPrepInCS.ResUnavail Number of FailedPreparations forCS Incoming Inter-RAT Handover (Noresource available)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189763IRATHO.SuccOutPSUE Number ofSuccessful PS

WRFD-02030802

PS HandoverBetween

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Outgoing Inter-RAT HandoversInitiated by UE forCell

UMTS andGPRS

67189907VS.IRATHO.FailOutCS.UEFail.GCell Number of FailedCS Inter-RATHandoversBetweenNeighboring CellsDue to UE Fault

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189908VS.IRATHO.FaiOutPSUTRAN.UEFail.GCell Number of FailedPS Inter-RATHandoversBetweenNeighboring CellsDue to UE Fault

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67189909VS.SHO.SuccASU.NCell Number ofSuccessful SoftHandoversBetweenNeighboring Cells

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67189910VS.SHO.AttASU.NCell Number of SoftHandover AttemptsBetweenNeighboring Cells

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67189911VS.SHO.FailASU.NoReply.NCell Number of FailedSoft HandoversBetweenNeighboring CellsDue to WaitingActive Set UpdateResponse Timeout

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67189912VS.HHO.FailOut.NoReply.NCell Number of FailedHard HandoverBetweenNeighboring CellsDue to Timeout

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67190048VS.SHO.RLFail.Other.Tx Number of RadioLink Failures on IurInterface for DRNC(Other Reasons)

WRFD-020203

Inter RNCSoftHandover

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67190311VS.IRATHO.AttRelocPrepInCS.RNC Number of CSIncoming Inter-RATHandoverPreparationAttempts for RNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190312VS.IRATHO.SuccRelocPrepInCS.RNC Number ofSuccessfulPreparations forCS Incoming Inter-RAT Handover forRNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190314VS.IRATHO.SuccInCS.RNC Number ofSuccessful CSIncoming Inter-RATHandovers for RNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190316VS.IRATHO.AttOutPSUE.RNC Number of PSOutgoing Inter-RAT HandoverAttempts Initiatedby UE for RNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190398VS.IRATHO.AttRelocPrepOutCS.RNC Number of CSOutgoing Inter-RAT HandoverPreparationAttempts for RNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190399VS.IRATHO.SuccOutCS.RNC Number ofSuccessful CSOutgoing Inter-RAT Handovers forRNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

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Inter-RATHandoverBased onLoad

67190400VS.IRATHO.SuccRelocPrepOutCS.RNC Number ofSuccessfulPreparations forCS Outgoing Inter-RAT Handover forRNC

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190410VS.IRATHO.FailInCS.NoReply Number of FailedCS Inter-RATIncomingHandovers Due toNo Response fromUE for Cell

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190411IRATHO.AttOutPSUTRAN Number of PSOutgoing Inter-RAT HandoverAttempts Initiatedby RNC for Cell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190412IRATHO.SuccOutPSUTRAN Number ofSuccessful PSOutgoing Inter-RAT HandoversInitiated by RNC forCell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190413VS.IRATHO.AttOutPSUE Number of PSInter-RATOutgoing Inter-RAT HandoverRequests Initiatedby UE for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67190414VS.IRATHO.SuccRelocPrepInCS Number ofSuccessfulpreparations forCS Incoming Inter-RAT Handovers forCell

WRFD-02040002

WRFD-020303

WRFD-020305

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RAT

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WRFD-020306

HandoverBased onService

Inter-RATHandoverBased onLoad

67190440VS.LCC.LDR.InterRATCS Number of UEsPerforming CSInter-RATHandovers in BasicCongestion for Cell

WRFD-020306

Inter-RATHandoverBased onLoad

67190441VS.LCC.LDR.InterRATPS Number of UEsPerforming PSInter-RATHandovers in BasicCongestion for Cell

WRFD-020306

Inter-RATHandoverBased onLoad

67190476IRATHO.FailOutPSUTRAN.CfgUnsupp Number of FailedPS Outgoing Inter-RAT HandoversInitiated by RNC(Configurationunsupported)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190477IRATHO.FailOutPSUTRAN.PhyChFail Number of FailedPS Outgoing Inter-RAT HandoversInitiated by RNC(Physical ChannelFailure)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67190877VS.HHO.AttInterFreqOut.IntraNodeB Number ofOutgoing Inter-Frequency HardHandover Attemptsin NodeB for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67190878VS.HHO.SuccInterFreqOut.IntraNodeB Number ofSuccessfulOutgoing Inter-Frequency HardHandovers inNodeB for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67190884VS.HHO.AttInterFreqOut.InterNodeBIntraRNC Number ofOutgoing Inter-

WRFD-020302

InterFrequency

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Frequency HardHandoversAttempts BetweenDifferent NodeBsof RNC for Cell

WRFD-020304

HardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67190885VS.HHO.SuccInterFreqOut.InterNodeBIntraRNC Number ofSuccessfulOutgoing Inter-Frequency HardHandoversBetween DifferentNodeBs of RNC forCell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67190891VS.HHO.AttInterFreqOut.InterRNC Number ofOutgoing Inter-Frequency HardHandoversAttempts BetweenRNCs for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67190892VS.HHO.SuccInterFreqOut.InterRNC Number ofSuccessfulOutgoing Inter-Frequency HardHandoversBetween RNCs forCell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67191152VS.LCC.LDR.HSDPA.InterRATPS Number of HSDPAUEs Performing PSInter-RATHandovers in BasicCongestion for Cell

WRFD-020306

Inter-RATHandoverBased onLoad

67192186IRATHO.FailRelocPrepOutCS.HigherTrafficLod Number of FailedPreparations forCS Outgoing Inter-RAT Handover forCell (Traffic LoadIn The Target CellHigher Than In TheSource Cell)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192187VS.IRATHO.FailRelocPrepInCS.TgtHighLoad Number of FailedPreparations forCS Incoming Inter-RAT Handover

WRFD-02040002

WRFD-

Inter SystemDirect Retry

Inter-RAT

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(Traffic Load InThe Target CellHigher Than In TheSource Cell)

020303

WRFD-020305

WRFD-020306

HandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192284VS.HHO.AttIntraFreq.RNC Number of Intra-Frequency HardHandoverRequests for RNC

WRFD-020301

IntraFrequencyHardHandover

67192285VS.HHO.SuccIntraFreq.RNC Number ofSuccessful Intra-Frequency HardHandovers for RNC

WRFD-020301

IntraFrequencyHardHandover

67192367VS.HSUPA.SHO.AttOut Number of EDCHRL Addition andDeletion Attemptsby Soft Handoverfor Cell

WRFD-01061204

HSUPAMobilityManagement

67192368VS.HSUPA.SHO.SuccOut Number ofSuccessful EDCHRL Additions andDeletions by SoftHandover for Cell

WRFD-01061204

HSUPAMobilityManagement

67192369VS.HSUPA.SHO.ServCellChg.SuccOut Number ofSuccessful HSUPAServing CellChanges in SoftHandover Statusfor Cell

WRFD-01061204

HSUPAMobilityManagement

67192370VS.HSUPA.SHO.ServCellChg.AttOut Number of HSUPAServing CellChange Attemptsin Soft HandoverStatus for Cell

WRFD-01061204

HSUPAMobilityManagement

67192371VS.HSUPA.HHO.E2E.SuccOutIntraFreq Number ofSuccessful HSUPAServing CellChanges Due toIntra-FrequencyHard Handoverwithout ChannelChange for Cell

WRFD-01061204

HSUPAMobilityManagement

67192372VS.HSUPA.HHO.E2E.AttOutIntraFreq Number of HSUPAServing CellChange AttemptsDue to Intra-Frequency HardHandover withoutChannel Changefor Cell

WRFD-01061204

HSUPAMobilityManagement

67192373VS.HSUPA.HHO.E2E.SuccOutInterFreq Number ofSuccessful HSUPAServing CellChanges Due toInter-FrequencyHard Handoverwithout ChannelChange for Cell

WRFD-01061204

HSUPAMobilityManagement

67192374VS.HSUPA.HHO.E2E.AttOutInterFreq Number of HSUPAServing CellChange Attempts

WRFD-01061204

HSUPAMobilityManagement

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Due to Inter-Frequency HardHandover withoutChannel Changefor Cell

67192472VS.HSUPA.HHO.E2D.SuccOutIntraFreq Number ofSuccessful HSUPAIntra-FrequencyHard Handoversfor Cell(EDCH toDCH)

WRFD-01061204

HSUPAMobilityManagement

67192473VS.HSUPA.HHO.E2D.AttOutIntraFreq Number of HSUPAIntra-FrequencyHard HandoverAttempts forCell(EDCH to DCH)

WRFD-01061204

HSUPAMobilityManagement

67192474VS.HSUPA.HHO.E2D.SuccOutInterFreq Number ofSuccessful HSUPAInter-FrequencyHard Handoversfor Cell(EDCH toDCH)

WRFD-01061204

HSUPAMobilityManagement

67192475VS.HSUPA.HHO.E2D.AttOutInterFreq Number of HSUPAInter-FrequencyHard HandoverAttempts forCell(EDCH to DCH)

WRFD-01061204

HSUPAMobilityManagement

67192506VS.IRATHO.HSUPA.SuccOutPSUTRAN Number ofSuccessful PSOutgoing Inter-RAT Handovers forHSUPA Servicesfor Cell

WRFD-01061204

HSUPAMobilityManagement

67192507VS.IRATHO.HSUPA.AttOutPSUTRAN Number of PSOutgoing Inter-RAT HandoverAttempts forHSUPA Servicesfor Cell

WRFD-01061204

HSUPAMobilityManagement

67192553VS.HHO.FailIntraFreqOut.NoReply Number of FailedOutgoing Intra-Frequency HardHandovers Due toNo Response fromthe UE for Cell

WRFD-020301

IntraFrequencyHardHandover

67192554VS.HHO.FailIntraFreqOut.PrepFail Number of FailedPreparations forOutgoing Intra-Frequency HardHandovers for Cell

WRFD-020301

IntraFrequencyHardHandover

67192555VS.HHO.FailInterFreqOut.PrepFail Number of FailedPreparations forOutgoing Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67192556VS.HHO.FailIntraFreqOut.RLSetupFail Number of FailedPreparations forOutgoing Intra-Frequency HardHandovers Due to

WRFD-020301

IntraFrequencyHardHandover

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Radio LinkEstablishmentFailure for Cell

67192557VS.HHO.FailInterFreqOut.RLSetupFail Number of FailedPreparations forOutgoing Inter-Frequency HardHandovers Due toRadio LinkEstablishmentFailure for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67192558VS.HHO.FailIntraFreqOut.CfgUnsupp Number of FailedOutgoing Intra-Frequency HardHandovers for Cell(ConfigurationUnsupported)

WRFD-020301

IntraFrequencyHardHandover

67192559VS.HHO.FailIntraFreqOut.PyhChFail Number of FailedOutgoing Intra-Frequency HardHandovers for Cell(Physical ChannelFailure)

WRFD-020301

IntraFrequencyHardHandover

67192560VS.HHO.FailIntraFreqOut.ISR Number of FailedOutgoing Intra-Frequency HardHandovers for Cell(IncompatibleSimultaneousReconfiguration)

WRFD-020301

IntraFrequencyHardHandover

67192561VS.HHO.FailIntraFreqOut.CellUpdt Number of FailedOutgoing Intra-Frequency HardHandovers for Cell(Cell UpdateOccurred)

WRFD-020301

IntraFrequencyHardHandover

67192562VS.SHO.SigOnly.Att Number of SoftHandover Attemptswith only SignalingConnection for Cell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67192577VS.SHO.FailRLSetupIur.TransCong.Rx Number of RadioLink Setup Failureson Iur Interface forSRNC (TransportResourceUnavailable)

WRFD-020203

Inter RNCSoftHandover

67192578VS.SHO.FailRLAddIur.TransCong.Rx Number of RadioLink AdditionFailures on IurInterface for SRNC(TransportResourceUnavailable)

WRFD-020203

Inter RNCSoftHandover

67192579VS.SHO.FailRLRecfgIur.TransCongRx Number of FailedRadio LinkSynchronousReconfigurationson Iur Interface forDRNC (TransportResourceUnavailable)

WRFD-020203

Inter RNCSoftHandover

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67192580VS.SHO.FailRLSetupIur.TransCongTx Number of FailedRadio Link Setupson Iur Interface forDRNC (TransportResourceUnavailable)

WRFD-020203

Inter RNCSoftHandover

67192581VS.SHO.FailRLAddIur.TransCong.Tx Number of FailedRadio LinkAdditions on IurInterface for DRNC(TransportResourceUnavailable)

WRFD-020203

Inter RNCSoftHandover

67192583VS.DCCC.Att.F2P Number of StateTransfer Attemptsfrom CELL_FACHto CELL_PCH forCell

WRFD-021101

WRFD-020202

DynamicChannelConfigurationControl(DCCC)

Intra RNCSoftHandover

67192584VS.DCCC.Succ.F2P Number ofSuccessful StateTransfers fromCELL_FACH toCELL_PCH for Cell

WRFD-021101

WRFD-020202

DynamicChannelConfigurationControl(DCCC)

Intra RNCSoftHandover

67192614VS.HHO.FailIntraFreqOut.InvCfg Number of FailedOutgoing Intra-Frequency HardHandovers for Cell(InvalidConfiguration)

WRFD-020301

IntraFrequencyHardHandover

67192645VS.LCC.LDR.HSUPA.InterRATPS Number of HSUPAUEs Performing PSInter-RATHandover in BasicCongestion for Cell

WRFD-020306

Inter-RATHandoverBased onLoad

67192654VS.IRATHO.AttRelocPrepOutCS.Sig Number ofPreparations forCS Outgoing Inter-RAT HandoverWhen onlySignaling Exists forCell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192655VS.IRATHO.SuccRelocPrepOutCS.Sig Number ofSuccessfulPreparations forCS Outgoing Inter-RAT HandoverWhen onlySignaling Exists forCell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192656VS.IRATHO.AttOutCS.Sig Number of CSOutgoing Inter-

WRFD-020303

Inter-RATHandover

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RAT HandoverAttempts Whenonly SignalingExists for Cell

WRFD-020305

WRFD-020306

Based onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192657VS.IRATHO.SuccOutCS.Sig Number ofSuccessful CSOutgoing Inter-RAT HandoversWhen onlySignaling Exists forCell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192658IRATHO.FailRelocPrepOutCS.NoResAvail Number of FailedPreparations forCS Outgoing Inter-RAT Handover forCell (No ResourceAvailable)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192659IRATHO.FailRelocPrepOutCS.UKnowRNC Number of FailedPreparations forCS Outgoing Inter-RAT Handover forCell (UnknownTarget RNC)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192660VS.IRATHO.FailOutCS.NoReply Number of Timesthat the TimerWaiting for IuRelease CommandExpires in CSOutgoing Inter-RAT Handover forCell

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192661VS.IRATHO.FailOutPSUTRAN.NoReply Number of Timesthat the Timer

WRFD-020303

Inter-RATHandover

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Waiting for IuRelease CommandExpires in PSOutgoing Inter-RAT HandoverInitiated by RNC forCell

WRFD-020305

WRFD-020306

Based onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

67192662VS.IRATHO.AttRelocPrepOutPS Number ofPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192663VS.IRATHO.SuccRelocPrepOutPS Number ofSuccessfulPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192664VS.IRATHO.AttRelocOutPS Number ofEnhanced PSOutgoing Inter-RAT HandoverAttempts for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192665VS.IRATHO.SuccRelocOutPS Number ofSuccessfulEnhanced PSOutgoing Inter-RAT Handovers forCell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192666VS.IRATHO.FailRelocPrepOutPS.TAlExp Number of FailedPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell (TRELOCallocexpiry)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192667VS.IRATHO.FailRelocPrepOutPS.TgtFail Number of FailedPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell (RelocationFailure in TargetCN/RNC or TargetSystem)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192668VS.IRATHO.FailRelocPrepOutPS.ReloUnSupp Number of FailedPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell (Relocationnot supported inTarget RNC orTarget system)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192669VS.IRATHO.FailRelocPrepOutPS.TgtHighLoad Number of FailedPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell (Traffic LoadIn The Target CellHigher Than In TheSource Cell)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

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67192670VS.IRATHO.FailRelocPrepOutPS.NoResAvail Number of FailedPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell (No ResourceAvailable)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192671VS.IRATHO.FailRelocPrepOutPS.UnKnowRNC Number of FailedPreparations forEnhanced PSOutgoing Inter-RAT Handover forCell (UnknownTarget RNC)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192672VS.IRATHO.FailRelocOutPS.CfgUnSupp Number of FailedEnhanced PSOutgoing Inter-RAT Handovers forCell (ConfigurationUnsupported)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192673VS.IRATHO.FailRelocOutPS.PhyChFail Number of FailedEnhanced PSOutgoing Inter-RAT Handovers forCell (PhysicalChannel Failure)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192674VS.IRATHO.FailRelocOutPS.NoReply Number of Timesthat the TimerWaiting for IuRelease CommandExpires inEnhanced PSOutgoing Inter-RAT Handover forCell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192675VS.IRATHO.AttRelocPrepInPS Number ofPreparations forEnhanced PSIncoming Inter-RATHandover for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192676VS.IRATHO.SuccRelocPrepInPS Number ofSuccessfulPreparations forEnhanced PSIncoming Inter-RATHandover for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192677VS.IRATHO.SuccRelocInPS Number ofSuccessfulEnhanced PSIncoming Inter-RATHandovers for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192678VS.IRATHO.FailRelocPrepInPS.TgtFail Number of FailedPreparations forEnhanced PSIncoming Inter-RATHandover for cell(Relocation failurein target CN/RNCor target system)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192679VS.IRATHO.FailRelocPrepInPS.ReloUnSupp Number of FailedPreparations forEnhanced PSIncoming Inter-RATHandover for cell(Relocation notsupported in targetRNC or targetsystem)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

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67192680VS.IRATHO.FailRelocPrepInPS.ResUnavail Number of FailedPreparations forEnhanced PSIncoming Inter-RATHandover for cell(No resourceavailable)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192681VS.IRATHO.FailRelocPrepInPS.TgtHighLoad Number of FailedPreparations forEnhanced PSIncoming Inter-RATHandover for cell(Traffic Load InThe Target CellHigher Than In TheSource Cell)

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67192682VS.IRATHO.FailRelocInPS.NoReply Number of FailedEnhanced PSIncoming Inter-RATHandovers Due toUE ResponseTimeout for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

67193397VS.HHO.InterFreqOut.CS.MeasTimeOut Number ofHandovers NotPerformed Due toCS Inter-FrequencyMeasurementExpiry for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67193398VS.HHO.InterFreqOut.PS.MeasTimeOut Number ofHandovers NotPerformed Due toPS Inter-FrequencyMeasurementExpiry for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67193399VS.IRATHO.OutCS.MeasTimeOut Number of CSInter-RATMeasurementExpiry for Cell

WRFD-020303

WRFD-020309

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased on DLQoS

67193400VS.IRATHO.OutPS.MeasTimeOut Number of PSInter-RATMeasurementExpiry for Cell

WRFD-020303

WRFD-020309

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased on DLQoS

67193563VS.SHO.SigOnly.Succ Number ofSuccessful SoftHandovers withonly SignalingConnection for Cell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

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67193564VS.SHO.AttRLAdd.Prep Number of SoftHandoverDecisions forRadio Link Additionfor Cell

WRFD-020202

WRFD-020201

Intra RNCSoftHandover

Intra Node BSofterHandover

67194881VS.CM.ULSF2.Act.Att Number of UplinkSF-2 CompressionMode ActivationRequests for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67194882VS.CM.ULHLS.Act.Att Number of UplinkHLS CompressionMode ActivationRequests for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67194883VS.CM.ULSF2.Act.Fail Number of UplinkSF-2 CompressionMode ActivationFailures for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67194884VS.CM.ULHLS.Act.Fail Number of UplinkHLS CompressionMode ActivationFailures for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67194885VS.CM.DLSF2.Act.Att Number ofDownlink SF-2Compression ModeActivationRequests for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67194886VS.CM.DLHLS.Act.Att Number of WRFD- Inter

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Downlink HLSCompression ModeActivationRequests for Cell

020302

WRFD-020304

FrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67194887VS.CM.DLSF2.Act.Fail Number ofDownlink SF-2Compression ModeActivation Failuresfor Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67194888VS.CM.DLHLS.Act.Fail Number ofDownlink HLSCompression ModeActivation Failuresfor Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

67195485VS.HSUPA.SHO.ServCellChg.AttOutIur Number of inter-RNC HSUPAServing CellChange Attemptsin Soft HandoverStatus for Cell

WRFD-01061204

HSUPAMobilityManagement

67195486VS.HSUPA.SHO.ServCellChg.SuccOutIur Number ofSuccessful inter-RNC HSUPAServing CellChanges in SoftHandover Statusfor Cell

WRFD-01061204

HSUPAMobilityManagement

67195487VS.HSUPA.HHO.E2E.SuccOutIur Number ofSuccessful HSUPAServing CellChanges Due tointer-RNC HardHandover withoutChannel Changefor Cell

WRFD-01061204

HSUPAMobilityManagement

67195488VS.HSUPA.HHO.E2E.AttOutIur Number of HSUPAServing CellChange AttemptsDue to inter-RNCHard Handoverwithout ChannelChange for Cell

WRFD-01061204

HSUPAMobilityManagement

67196029VS.LCC.LDR.HSUPA.InterRATCS Number of HSUPAUEs Performing CSInter-RATHandovers in BasicCongestion for Cell

WRFD-020306

Inter-RATHandoverBased onLoad

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67196030VS.LCC.LDR.HSDPA.InterRATCS Number of HSDPAUEs Performing CSInter-RATHandovers in BasicCongestion for Cell

WRFD-020306

Inter-RATHandoverBased onLoad

67199432VS.SHO.AS.1.RNC Mean Number ofUEs with OneRadio Link for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67199433VS.SHO.AS.2Softer.RNC Mean Number ofUEs with TwoCombined RadioLinks for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67199434VS.SHO.AS.2Soft.RNC Mean Number ofUEs with TwoUncombined RadioLinks for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67199435VS.SHO.AS.3Softer.RNC Mean Number ofUEs with ThreeCombined RadioLinks for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67199436VS.SHO.AS.3Soft.RNC Mean Number ofUEs with ThreeUncombined RadioLinks for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67199437VS.SHO.AS.3Soft2Softer.RNC Mean Number ofUEs with ThreeRadio Links andTwo Combined forRNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203800VS.RAB.ModReqCS.VP.Fallback.RNC Number of VPServices FallenBack to AMRServices for RNC

WRFD-020307

VideoTelephonyFallback toSpeech(AMR) forInter-RAT HO

67203933VS.SHO.AS.4.RNC Mean Number ofUEs with FourRadio Links forRNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203934VS.SHO.AS.5.RNC Mean Number ofUEs with FiveRadio Links forRNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203935VS.SHO.AS.6.RNC Mean Number ofUEs with Six RadioLinks for RNC

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoft

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Handover

67203936VS.SHO.AS.1RL Mean Number ofUEs with OneRadio Link for Cell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203937VS.SHO.AS.2RL Mean Number ofUEs with TwoRadio Links forCell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203938VS.SHO.AS.3RL Mean Number ofUEs with ThreeRadio Links forCell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203939VS.SHO.AS.4RL Mean Number ofUEs with FourRadio Links forCell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203940VS.SHO.AS.5RL Mean Number ofUEs with FiveRadio Links forCell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

67203941VS.SHO.AS.6RL Mean Number ofUEs with Six RadioLinks for Cell

WRFD-020202

WRFD-020203

Intra RNCSoftHandover

Inter RNCSoftHandover

73393849VS.SHO.PS.Att Number of SoftHandover Attemptsfor PS Services forCell

WRFD-020201

WRFD-020202

Intra Node BSofterHandover

Intra RNCSoftHandover

73393850VS.SHO.PS.Succ Number ofSuccessful SoftHandovers for PSServices for Cell

WRFD-020201

WRFD-020202

Intra Node BSofterHandover

Intra RNCSoftHandover

73393851VS.HHO.FailIntraFreqOut.InterRNC.CellUpdt Number of FailedOutgoing Intra-Frequency HardHandoversBetween RNCs forCell (Cell updateoccurred)

WRFD-020301

IntraFrequencyHardHandover

73393852VS.HHO.FailIntraFreqOut.InterRNC.NoReply Number of FailedOutgoing Intra-Frequency HardHandoversBetween the RNCsDue to NoResponse from theUE for Cell

WRFD-020301

IntraFrequencyHardHandover

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73393853VS.HHO.FailInterFreqOut.InterRNC.CfgUnsupp Number of FailedOutgoing Inter-Frequency HardHandoversBetween the RNCsfor Cell(ConfigurationUnsupported)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393854VS.HHO.FailInterFreqOut.InterRNC.PhyChFail Number of FailedOutgoing Inter-Frequency HardHandoversBetween the RNCsfor Cell (PhysicalChannel Failure)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393855VS.HHO.FailInterFreqOut.InterRNC.ISR Number of FailedOutgoing Inter-Frequency HardHandoversBetween the RNCsfor Cell(IncompatibleSimultaneousReconfiguration)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393856VS.HHO.FailInterFreqOut.InterRNC.InvCfg Number of FailedOutgoing Inter-Frequency HardHandoversBetween the RNCsfor Cell (InvalidConfiguration)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393857VS.HHO.FailInterFreqOut.InterRNC.CellUpdt Number of FailedOutgoing Inter-Frequency HardHandoversBetween the RNCsfor Cell (CellUpdate Occurred)

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393858VS.HHO.FailInterFreqOut.InterRNC.NoReply Number of FailedOutgoing Inter-Frequency HardHandoversBetween the RNCsDue to NoResponse from theUE for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandover

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Based on DLQoS

73393922VS.IRATHO.AttOutCS.TrigULTxp Number of CSInter-RATHandover AttemptsBased on ULTransmit Power ofUE for Cell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393923VS.IRATHO.AttOutCS.TrigDLTxp Number of CSInter-RATHandover AttemptsBased on DL CodePower for Cell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393924VS.IRATHO.AttOutPS.TrigULTxp Number of PSInter-RATHandover AttemptsBased on ULTransmit Power ofUE for Cell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393925VS.IRATHO.AttOutPS.TrigDLTxp Number of PSInter-RATHandover AttemptsBased on DL CodePower for Cell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393928VS.IRATHO.SuccOutCS.TrigULTxp Number ofSuccessful CSInter-RATHandovers Basedon UL TransmitPower of UE forCell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393929VS.IRATHO.SuccOutCS.TrigDLTxp Number ofSuccessful CSInter-RATHandovers Basedon DL Code Powerfor Cell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393932VS.IRATHO.SuccOutPS.TrigULTxp Number ofSuccessful PSInter-RATHandovers Basedon UL TransmitPower of UE forCell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393933VS.IRATHO.SuccOutPS.TrigDLTxp Number ofSuccessful PSInter-RATHandovers Basedon DL Code Powerfor Cell

WRFD-020309

Inter-RATHandoverBased on DLQoS

73393934VS.HHO.AttInterFreqOut.PS.UlBler Number of PSInter-FrequencyHard HandoverAttempts Based onUL BLER for Cell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393935VS.HHO.AttInterFreqOut.CS.UeTxPwr Number of CSInter-FrequencyHard HandoverAttempts Based onUE Transmit Powerfor Cell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393936VS.HHO.AttInterFreqOut.PS.UeTxPwr Number of PSInter-FrequencyHard HandoverAttempts Based onUE Transmit Power

WRFD-020304

InterFrequencyHardHandoverBased on DL

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for Cell QoS

73393937VS.HHO.AttInterFreqOut.CS.Tcp Number of CSInter-FrequencyHard HandoverAttempts Based onDL Transmit Powerfor Cell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393938VS.HHO.AttInterFreqOut.PS.Tcp Number of PSInter-FrequencyHard HandoverAttempts Based onDL Transmit Powerfor Cell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393945VS.HHO.SuccInterFreqOut.PS.UlBler Number ofSuccessful PSInter-FrequencyHard HandoversBased on UL BLERfor Cell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393946VS.HHO.SuccInterFreqOut.CS.UeTxPwr Number ofSuccessful CSInter-FrequencyHard HandoversBased on UETransmit Power forCell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393947VS.HHO.SuccInterFreqOut.PS.UeTxPwr Number ofSuccessful PSInter-FrequencyHard HandoversBased on UETransmit Power forCell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393948VS.HHO.SuccInterFreqOut.CS.Tcp Number ofSuccessful CSInter-FrequencyHard HandoversBased on DLTransmit Power forCell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393949VS.HHO.SuccInterFreqOut.PS.Tcp Number ofSuccessful PSInter-FrequencyHard HandoversBased on DLTransmit Power forCell

WRFD-020304

InterFrequencyHardHandoverBased on DLQoS

73393984VS.HSUPA.TTI2to10.Att Number of TTISwitch AttemptsDuring RBReconfiguration forCell(2ms to 10ms)

WRFD-010690

WRFD-01061404

TTI Switchfor BEServicesBased onCoverage

HSUPA2ms/10msTTIHandover

73393985VS.HSUPA.TTI2to10.Succ Number ofSuccessful TTISwitches DuringRBReconfiguration forCell(2ms to 10ms)

WRFD-010690

WRFD-01061404

TTI Switchfor BEServicesBased onCoverage

HSUPA2ms/10msTTIHandover

73393986VS.HSUPA.TTI10to2.Att Number of TTI WRFD- TTI Switch

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Switch AttemptsDuring RBReconfiguration forCell(10ms to 2ms)

010690

WRFD-01061404

for BEServicesBased onCoverage

HSUPA2ms/10msTTIHandover

73393987VS.HSUPA.TTI10to2.Succ Number ofSuccessful TTISwitches DuringRBReconfiguration forCell(10ms to 2ms)

WRFD-010690

WRFD-01061404

TTI Switchfor BEServicesBased onCoverage

HSUPA2ms/10msTTIHandover

73393988VS.HHO.AttOutIntraNodeB.CS.NCell Number of CSOutgoing Intra-NodeB Inter-CellHard HandoverAttempts

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393989VS.HHO.SuccOutIntraNodeB.CS.NCell Number ofSuccessful CSOutgoing Intra-NodeB Inter-CellHard Handovers

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393990VS.HHO.FailOutIntraNodeB.NoReply.CS.NCell Number of FailedCS Outgoing Intra-NodeB Inter-CellHard Handovers(UE No Response)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393991VS.HHO.FailOutIntraNodeB.PhyChFail.CS.NCell Number of FailedCS Outgoing Intra-NodeB Inter-CellHard Handovers

WRFD-020301

WRFD-

IntraFrequencyHardHandover

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(Physical ChannelFailure)

020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393992VS.HHO.AttOutIntraNodeB.PS.NCell Number of PSOutgoing Intra-NodeB Inter-CellHard HandoverAttempts

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393993VS.HHO.SuccOutIntraNodeB.PS.NCell Number ofSuccessful PSOutgoing Intra-NodeB Inter-CellHard Handovers

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393994VS.HHO.FailOutIntraNodeB.NoReply.PS.NCell Number of FailedPS Outgoing Intra-NodeB Inter-CellHard Handovers(UE No Response)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393995VS.HHO.FailOutIntraNodeB.PhyChFail.PS.NCell Number of FailedPS Outgoing Intra-NodeB Inter-CellHard Handovers(Physical ChannelFailure)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandover

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Based onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393996VS.HHO.AttOutInterNodeBIntraRNC.CS.NCell Number of CSOutgoing Intra-RNC Inter-NodeBInter-Cell HardHandover Attempts

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393997VS.HHO.SuccOutInterNodeBIntraRNC.CS.NCell Number ofSuccessful CSOutgoing Intra-RNC Inter-NodeBInter-Cell HardHandovers

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393998VS.HHO.FailOutInterNodeBIntraRNC.NoReply.CS.NCell Number of FailedCS Outgoing Intra-RNC Inter-NodeBInter-Cell HardHandovers (UE NoResponse)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73393999VS.HHO.FailOutInterNodeBIntraRNC.PhyChFail.CS.NCellNumber of FailedCS Outgoing Intra-RNC Inter-NodeBInter-Cell HardHandovers(Physical ChannelFailure)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHard

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HandoverBased on DLQoS

73394000VS.HHO.AttOutInterNodeBIntraRNC.PS.NCell Number of PSOutgoing Intra-RNC Inter-NodeBInter-Cell HardHandover Attempts

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394001VS.HHO.SuccOutInterNodeBIntraRNC.PS.NCell Number ofSuccessful PSOutgoing Intra-RNC Inter-NodeBInter-Cell HardHandovers

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394002VS.HHO.FailOutInterNodeBIntraRNC.NoReply.PS.NCell Number of FailedPS Outgoing Intra-RNC Inter-NodeBInter-Cell HardHandovers (UE NoResponse)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394003VS.HHO.FailOutInterNodeBIntraRNC.PhyChFail.PS.NCellNumber of FailedPS Outgoing Intra-RNC Inter-NodeBInter-Cell HardHandovers(Physical ChannelFailure)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394004VS.HHO.AttOutInterRNCIur.CS.NCell Number of CSOutgoing Inter-

WRFD-020301

IntraFrequency

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RNC Inter-CellHard HandoverAttempts

WRFD-020302

WRFD-020304

HardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394005VS.HHO.SuccOutInterRNCIur.CS.NCell Number ofSuccessful CSOutgoing Inter-RNC Inter-CellHard Handovers

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394006VS.HHO.FailOutInterRNCIur.CfgUnsup.CS.NCell Number of FailedCS Outgoing Inter-RNC Inter-CellHard Handovers(ConfigurationUnsupported)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394007VS.HHO.FailOutInterRNCIur.PhyChFail.CS.NCell Number of FailedCS Outgoing Inter-RNC Inter-CellHard Handovers(Physical ChannelFailure)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394008VS.HHO.AttOutInterRNCIur.PS.NCell Number of PSOutgoing Inter-RNC Inter-CellHard HandoverAttempts

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandover

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Based onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394009VS.HHO.SuccOutInterRNCIur.PS.NCell Number ofSuccessful PSOutgoing Inter-RNC Inter-CellHard Handovers

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394010VS.HHO.FailOutInterRNCIur.CfgUnsup.PS.NCell Number of FailedPS Outgoing Inter-RNC Inter-CellHard Handovers(ConfigurationUnsupported)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394011VS.HHO.FailOutInterRNCIur.PhyChFail.PS.NCell Number of FailedPS Outgoing Inter-RNC Inter-CellHard Handovers(Physical ChannelFailure)

WRFD-020301

WRFD-020302

WRFD-020304

IntraFrequencyHardHandover

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73394014VS.IRATHO.AttInCS Number of CSIncoming Inter-RATHandover Attemptsfor Cell

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased on

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Load

73394015VS.IRATHO.FailRelocPrepOutCS.Cancel Number of FailedCS Outgoing Inter-RAT HandoverPreparations forCell (RelocationCancelled)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394016VS.IRATHO.FailRelocPrepOutCS.CNNoReply Number of FailedCS Outgoing Inter-RAT HandoverPreparations forCell (RelocationCommand WaitTimeout)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394017VS.IRATHO.FailRelocPrepInCS.Abort Number of CSIncoming Inter-RATHandoverPreparationFailures for Cell (IuRELEASECOMMANDReceived)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394018VS.IRATHO.FailOutCS.Abort Number ofAbnormallyTerminated CSOutgoing Inter-RAT Handovers forCell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394019VS.IRATHO.FailRelocPrepOutCS.Abort Number of CSOutgoing Inter-RAT HandoverPreparationFailures for Cell (IuRELEASECOMMANDReceived)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394020VS.IRATHO.FailRelocPrepOutCS.ReqInfoNotAvail Number of FailedCS Outgoing Inter-RAT HandoverPreparations forCell (RequestedInformation NotAvailable)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandover

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Based onService

Inter-RATHandoverBased onLoad

73394021VS.IRATHO.FailOutPS Number of FailedPS Outgoing Inter-RAT HandoversInitiated by theRNC for Cell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394022VS.IRATHO.FailOutPS.Abort Number ofAbnormallyTerminated PSOutgoing Inter-RAT Handovers forCell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394034VS.IRATHO.AttRelocPrepOutCS.GCell Number of CSOutgoing Inter-RAT HandoverPreparationAttempts

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394035VS.IRATHO.AttRelocPrepOutCS.DR.GCell Number of CSOutgoing Inter-RAT HandoverPreparationAttempts (Directedretry)

WRFD-02040002

WRFD-020303

WRFD-020305

WRFD-020306

Inter SystemDirect Retry

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394037VS.IRATHO.SuccRelocPrepOutCS.GCell Number ofSuccessful CSOutgoing Inter-RAT HandoverPreparations

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

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73394038VS.IRATHO.FailRelocPrepOutCS.TAlExp.GCell Number of FailedCS Outgoing Inter-RAT HandoverPreparations(TRELOCallocexpiry)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73394039VS.IRATHO.FailRelocPrepOutCS.TgtFail.GCell Number of FailedCS Outgoing Inter-RAT HandoverPreparations(Relocation Failurein Target CN/RNCor Target System)

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73403766VS.HSUPA.HHO.E2D.AttOutIur Number of inter-RNC HSUPA HardHandover Attemptsfor Cell(EDCH toDCH)

WRFD-01061204

HSUPAMobilityManagement

73403767VS.HSUPA.HHO.E2D.SuccOutIur Number ofSuccessful inter-RNC HSUPA HardHandovers forCell(EDCH to DCH)

WRFD-01061204

HSUPAMobilityManagement

73403768VS.HHO.AttInterFreqIn.CS Number ofRequests for CSIncoming Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73403769VS.HHO.AttInterFreqIn.PS Number ofRequests for PSIncoming Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73403770VS.HHO.AttInterFreqOut.CS Number ofRequests for CSOutgoing Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHard

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HandoverBased on DLQoS

73403771VS.HHO.AttInterFreqOut.PS Number ofRequests for PSOutgoing Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73403772VS.HHO.SuccInterFreqIn.CS Number ofSuccessful for CSIncoming Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73403773VS.HHO.SuccInterFreqIn.PS Number ofSuccessful for PSIncoming Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73403774VS.HHO.SuccInterFreqOut.CS Number ofSuccessful for CSOutgoing Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73403775VS.HHO.SuccInterFreqOut.PS Number ofSuccessful for PSOutgoing Inter-Frequency HardHandovers for Cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73403776VS.HHO.InterFreqOut.CS.Drop Number of CS CallDrops due toUnsuccessfulOutgoing Inter-Frequency Hard

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased on

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Handovers for cell Coverage

InterFrequencyHardHandoverBased on DLQoS

73403777VS.HHO.InterFreqOut.PS.Drop Number of PS CallDrops due toUnsuccessfulOutgoing Inter-Frequency HardHandovers for cell

WRFD-020302

WRFD-020304

InterFrequencyHardHandoverBased onCoverage

InterFrequencyHardHandoverBased on DLQoS

73423107VS.IRATHO.FailOutPS.UEGen Number of FailedOutgoing UMTS-to-GSM PSHandovers due toUE ReselectionBack to a UTRANCell

WRFD-020303

WRFD-020305

WRFD-020306

Inter-RATHandoverBased onCoverage

Inter-RATHandoverBased onService

Inter-RATHandoverBased onLoad

73423288VS.SRVCC.U2GERAN.AttRelocPrepOutPS Number ofOutgoing Inter-RAT PS HandoverPreparationAttempts Triggeredby SRVCC for VoIPServices for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

73423289VS.SRVCC.U2GERAN.SuccRelocPrepOutPS Number ofSuccessfulOutgoing Inter-RAT PS HandoverPreparationsTriggered bySRVCC for VoIPServices for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

73423290VS.SRVCC.U2GERAN.SuccRelocOutPS Number ofSuccessfulOutgoing Inter-RAT PS HandoversTriggered bySRVCC for VoIPServices for Cell

WRFD-02030802

PS HandoverBetweenUMTS andGPRS

15 GlossaryFor the acronyms, abbreviations, terms, and definitions, see the Glossary.

16 Reference Documents

[1] 3GPP TS 23.122: Non Access Stratum functions related to Mobile Station (MS) in idle mode

[2] 3GPP TS 24.008: Mobile radio interface layer 3 specification; Core Network Protocols - Stage 3

[3] 3GPP TS 25.304: UE Procedures in Idle Mode and Procedures for Cell Reselection in Connected Mode

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[4] 3GPP TS 25.331: RRC Protocol Specification

[5] 3GPP TS 23.060: General Packet Radio Service (GPRS); Service description

[6] 3GPP TS 25.931: UTRAN Functions, Examples on Signaling Procedures