anr management feature parameter description(eran2.0_01)

eRAN

ANR Management Feature Parameter Description

Issue 01

Date 2010-07-30

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Ltd

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and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

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eRAN ANR Management Contents

Issue 01 (2010-07-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies

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Contents

1 Introduction.................................................................................................................................1-1 1.1 Scope.............................................................................................................................................................1-1 1.2 Intended Audience.........................................................................................................................................1-1 1.3 Change History..............................................................................................................................................1-1

2 Overview of ANR.......................................................................................................................2-1

3 Concepts Related to ANR.........................................................................................................3-1 3.1 NCL...............................................................................................................................................................3-1 3.2 NRT...............................................................................................................................................................3-1 T

3.3 TempNRT......................................................................................................................................................3-2 T

3.4 HO Blacklist..................................................................................................................................................3-2 3.5 HO Whitelist .................................................................................................................................................3-3 3.6 PCI ................................................................................................................................................................3-3 3.7 Abnormal Neighboring Cell Coverage..........................................................................................................3-3

4 Event-Triggered ANR ...............................................................................................................4-1 4.1 Automatic Detection of Missing Neighboring Cells .....................................................................................4-2

4.1.1 Overview..............................................................................................................................................4-2 4.1.2 Detecting Intra-Frequency Neighboring Cells Through UE Measurements ........................................4-2 4.1.3 Detecting Inter-Frequency or Inter-RAT Neighboring Cells Through UE Measurements...................4-3 4.1.4 Detecting Intra-Frequency or Inter-Frequency Neighboring Cells Through UE History Information.4-5

4.2 Automatic Analysis of Neighbor Relations ...................................................................................................4-6 4.2.1 Overview..............................................................................................................................................4-6 4.2.2 Analyzing Neighbor Relations in the TempNRT..................................................................................4-7 T

4.2.3 Analyzing Neighbor Relations in the Intra-RAT NRT .........................................................................4-8 T

4.3 Automatic Detection of PCI Collisions .......................................................................................................4-10 4.3.1 Overview............................................................................................................................................4-10 4.3.2 Automatically Detecting PCI Collisions ............................................................................................4-10 4.3.3 Reallocating PCIs...............................................................................................................................4-10

4.4 Automatic Detection of Abnormal Neighboring Cell Coverage..................................................................4-11 4.4.1 Overview............................................................................................................................................4-11 4.4.2 Automatically Detecting Abnormal Neighboring Cell Coverage.......................................................4-11 4.4.3 Querying the List of Abnormal Neighboring Cell Coverage .............................................................4-13

Contents eRAN

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5 Fast ANR......................................................................................................................................5-1

6 Manual Management of Neighbor Relations.......................................................................6-1 6.1 Adding or Removing a Neighbor Relation....................................................................................................6-1 6.2 Blacklisting a Neighbor Relation ..................................................................................................................6-1 6.3 Whitelisting a Neighbor Relation..................................................................................................................6-1

7 Engineering Guidelines............................................................................................................7-1 7.1 Configuring Event-Triggered ANR...............................................................................................................7-1 7.2 Configuring Fast ANR ..................................................................................................................................7-2

7.2.1 Switches for Fast ANR.........................................................................................................................7-2 7.2.2 Fast ANR-Related Parameter Settings .................................................................................................7-2

7.3 Automatically Deleting Neighbor Relations .................................................................................................7-3

8 Parameters ...................................................................................................................................8-1

9 Counters .......................................................................................................................................9-1

10 Glossary ...................................................................................................................................10-1 10.1 Terms.........................................................................................................................................................10-1 10.2 Acronyms and Abbreviations ....................................................................................................................10-1

11 Reference Documents............................................................................................................11-1

eRAN ANR Management 1 Introduction


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1 Introduction

1.1 Scope the Automatic Neighbor Relation (ANR) management feature and elines regarding the configuration of the feature.

1.2 Intend ument is intended for:

Personnel who need to understand the ANR management feature

ho work with Huawei products

1.3 Change HistoryThis nformation on the changes in different document versions. There are

e ANR management feature of a specific product version.

orial change: refers to the change in wording or the addition of the information that

Document Issues The document issue is as follows:

01 (2010-07-30)

01 (2010-07-30) Compared with draft (2010-05-20) of eRAN2.0, issue 01 (2010-07-30) of eRAN2.0 incorporates the changes described in the following table.

This document describes provides engineering guid

ed Audience This doc

Personnel w

section provides itwo types of changes, which are defined as follows:

Feature change: refers to the change in th

Editwas not described in the earlier version.

Draft (2010-05-20)

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Change Type

Change Description Parameter Change

Feature change

Parameters related to the algorithm for automatically analyzing neighbor relations are added.

The following parameters are added: ANRAddCellThd ANRDelCellThd NRTCellHOStatNum StatisticCycle FastAnrRprtAmount FastAnrRprtInterval FastAnrCycleTimer FastAnrRsrpThd FastAnrIntraRatMeasUeNum FastAnrInterRatMeasUeNum FastAnrIntraRatCumuUeNumThd FastAnrInterRatCumuUeNumThd

Editorial change

The information in the document is reorganized, and the description is optimized.

None

Draft (2010-05-20) Compared with issue 01 (2010-01-31) of eRAN1.1, draft (2010-05-20) of eRAN2.0 incorporates the changes described in the following table.

Change Type Change Description Parameter Change

Feature change The description of inter-RAT event-triggered ANR is added.

The following values are deleted from the SONAnrAlgoSwitch parameter:

SonANRswitch FastAnrAlgoSwitch

The following values are added to the SONAnrAlgoSwitch parameter:

IntraRatEventAnrSwitch InterRatEventAnrSwitch IntraRatAnrAutoDelSwitch InterRatAnrAutoDelSwitch IntraRatFastAnrSwitch InterRatFastAnrSwitch

Editorial change The title of this document is changed from ANR Parameter Description to ANR Management Feature Parameter Description.

None

eRAN ANR Management 1 Introduction


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Change Type Change Description Parameter Change

The information in the document is reorganized, and the description is optimized.

The description of the following parameters is deleted:

DlEarfcn UlEarfcn MeaBandwidth QoffsetFreq

eRAN ANR Management 2 Overview of ANR


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2 Overview of ANR

Operation and maintenance (OM) of the radio access network has become increasingcomplex, diff

ly icult, and costly because of a huge amount of network elements, implementation

om

integrity and effectiveness of Neighbor Cell Lists (NCLs) by automatically detecting missing neighboring cells, PCI collisions, and abnormal neighboring cell coverage.

,

ANR.3

measANR

er 4 "Event-Triggered

tails, see chapter 5 "Fast ANR."

of different system standards, and coexistence of different equipment vendors and telecoperators. To overcome this situation, the Self-Organization Network (SON) concept is proposed. The main functions of SON are self-configuration, self-optimization, and self-healing.

Neighbor relations play an important role in self-configuration and self-optimization. Neighbor relations are classified into normal neighbor relations and abnormal neighbor relations. Abnormal neighbor relations exist in the cases of missing neighboring cells, PCI collisions, and abnormal neighboring cell coverage.

ANR ensures the

Thus, the handover success rate increases, and the network performance improves. In additionANR does not require manual intervention, which reduces the costs of network planning and optimization.

automatically detects missing neighboring cells through UE measurements. 3GPP TS 36 31 [3] defines two types of UE measurements: event-triggered measurement and periodic

urement. Based on the two types, ANR is classified into event-triggered ANR and fast (also known as periodic ANR), which are described as follows:

Event-triggered ANR is applied in handover scenarios and used for automatic detection of missing neighboring cells, PCI collisions, and abnormal neighboring cell coverage, and automatic analysis of neighbor relations. For details, see chaptANR."Fast ANR is applied in non-handover scenarios and used for only automatic detection of missing neighboring cells. For de

Neighbor relations of a cell can also be managed manually as required. For details, see chapter 6 "Manual Management of Neighbor Relations."

Both event-triggered ANR and fast ANR are applicable to the same system or different systems. Figure 2-1 shows the ANR classifications.

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Figure 2-1 ANR classifications

eRAN ANR Management 3 Concepts Related to ANR


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3 Concepts Related to ANR

This chapter describes basic ANR-related concepts, which include NCL, TempNRT, Neighbor Relation Table (NRT), HO blacklist, HO whitelist, PCI, and abnormal neighboring cell coverage.

3.1 NCL

.

The eNodeB adds newly detected neighboring cells to the NCL. The NCL is used as a basis for creating neighbor relations. Neighboring cells in the NCL can be automatically managed (for example, added, deleted, or modified) by ANR. They can also be managed manually.

3.2 NRT

. Based on NRTs, handover, load balancing, and

NR automatically. They can also be managed manually.

T -1 shows ample of t T.

Table 3-1 An exa the NRT

An NCL contains the information about the neighboring cells of a cell. Unless otherwise stated, neighboring cells mentioned in this document exclude intra-eNodeB neighboring cellsAn NCL includes the ECGIs, PCIs, and Absolute Radio Frequency Channel Numbers (EARFCNs) of the neighboring cells.

An NRT contains the information about the neighbor relations between a cell and its neighboring cells. NRTs are classified into intra-RAT NRTs and inter-RAT NRTs. Each cell has an intra-RAT NRT and inter-RAT NRTinterference mitigation can be performed.

Generally, NRTs are managed by A

able 3 an ex he NR

mple of

SN LCI TCI No Remove No HO

1 LCI#1 TCI#1 TRUE TRUE

2 LCI#1 TCI#2 FALSE FALSE

3 LCI#1 TCI#3 TRUE TRUE

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For details about the NRT, see 3GPP TS 36.300 [2]. Huawei NRT does not include the No X2 attribute.

updated automatically or nu

e

OAN−

Othe NO HO at−

er. − If the NO HO attribute of a neighbor relation is FALSE, this neighbor relation can be

or a handover.

3.3 TempN

he eNodeB adds it to the TempNRT. Then, the eNodeB regularly analyzes the neighbor relation in the TempNRT. If the new neighbor relation is

eNodeB adds it to the intra-RAT NRT. For details, see section 4.2 "Automatic

The NRT contains the following information, which can bema ally:

SN: denotes the serial number of a neighbor relation. Local Cell Identifier (LCI): identifies the source cell of a neighbor relation. This attribute

is defined by LocalCellId. Target Cell Identifier (TCI): identifies the target cell of a neighbor relation. This attribut

is defined by the E-UTRAN Cell Global Identifier (ECGI) of the target cell. N Remove: indicates whether a neighbor relation can be removed from the NRT by

trR. By default, the NO Remove at ibute of a neighbor relation is set to FALSE. If the NO Remove attribute of a neighbor relation is TRUE, this neighbor relation

cannot be removed from the NRT. − If the NO Remove attribute of a neighbor relation is FALSE, this neighbor relation

can be removed from the NRT. N HO: indicates whether this neighbor relation can be used for a handover. By default,

tribute of a neighbor relation is set to FALSE. If the NO HO attribute of a neighbor relation is TRUE, this neighbor relation cannot be used for a handov

used f

RT A TempNRT is a temporary NRT. It has the same data structure the NRT. After detecting a new intra-RAT neighbor relation, t

normal, the Analysis of Neighbor Relations."

cting a new inter-RAT neighbor relation, the eNodeB adds it to the inter-RAT NRT directly.

3.4 HO Bla HO b s the information about neighbor relations that cannot be removed om by ANR or used for a handover. The neighbor relations in the HO ck following conditions:

A neighbor relation can be added to the HO blacklist manually. For details, see section 6.2 "Blacklisting a Neighbor Relation."

If dete

cklist

An lacklist [1] containaut atically from the NRTbla list must meet the

NO Remove = TRUE NO HO = TRUE

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3.5 HO Whitelist An HO whitelist [1] contains the information about neighbor relations that cannot be removed automatically from the NRT by ANR but can be used for a handover. The neighbor relations in the HO whitelist must meet the following conditions:

NO Remove = TRUE NO HO = FALSE

A neighbor relation can be added to the HO whitelist manually. For details, see section 6.3 "Whitelisting a Neighbor Relation."

3.6 PCI A PCI is the identifier of a physical cell. A maximum of 504 PCIs are supported, according to 3GPP TS 36.331 [3]. Therefore, PCI collisions occur inevitably.

The PCI of an E-UTRAN cell corresponds to:

The Primary Scrambling Code (PSC) of a UTRAN FDD cell The cell ID of a UTRAN TDD cell The Base Station Identity Code (BSIC) of a GERAN cell The Pseudo Number (PN) offset of a CDMA2000 cell

For details about PCIs, see reference document [3].

3.7 Abnormal Neighboring Cell Coverage Abnormal neighboring cell coverage refers to the coverage of a cell that is not adjacent to the serving cell but can be detected by a UE in the serving cell. The eNodeB regards this cell as a neighboring cell of the serving cell and therefore attempts to add the neighbor relation to the NRT. The signals of an abnormal neighboring cell are generally unstable and therefore the success rate of handovers to this cell is low.

The coverage of neighboring cells may be abnormal in any of the following scenarios:

The antenna tilt or orientation changes because of improper installation or a natural phenomenon such as strong wind.

In mountains, the signals of the umbrella cell cover lower cells.

eRAN ANR Management 4 Event-Triggered ANR


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4 Event-Triggered ANR

This chapter describes the following optional features:

LOFD-002001 Automatic Neighbour Relation(ANR) LOFD-002002 Inter-RAT ANR

a-RAT and inter-RAT event-triggered ANRs are controlled by the IntraRatEventAnrSwitch and InterRatEventAnrSwitch checkboxes under the SONA ding ANR function is enabled

he relations among the functions

Event-triggered ANR detects missing neighboring cells, PCI collisions, and abnormal neighboring cell coverage, and analyzes neighbor relations through UE measurements or history information.

Event-triggered ANR is classified into intra-RAT event-triggered ANR and inter-RAT event-triggered ANR. Intr

nrAlgoSwitch parameters respectively. The corresponwhen the relevant parameter is set to ON. Figure 4-1 shows tof event-triggered ANR.

Figure 4-1 Relations among the functions of event-triggered ANR

functions of intra-RAT and inter-RAT event-triggeThe red ANRs are described as follows:

ations. For details, see the following sections in this chapter.

Inter-RAT event-triggered ANR only detects missing inter-RAT neighboring cells. For details, see section 4.1 "Automatic Detection of Missing Neighboring Cells."

Intra-RAT event-triggered ANR detects missing intra-RAT neighboring cells, PCI collisions, and abnormal neighboring cell coverage, and analyzes neighbor rel

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4.1 Automatic Detection of Missing Neighboring Cells

4.1.1 Overview 3GPP TS 36.300 [2] defines the procedures for detecting intra-frequency, inter-frequency, and inter-RAT neighboring cells through UE measurements. A UE performs measurements in the DRX dormant state.

ANR can detect missing neighboring cells through UE history information in addition to UE measurements.

Automatic detection of missing neighboring cells minimizes the need for planning and configuring neighbor relations, thus facilitating network operations and maintenance.

4.1.2 Detecting Intra-Frequency Neighboring Cells Through UE Measurements

Assume that cell A and cell B are involved in a handover. The UE is under the coverage of cell A, and cell B is an intra-frequency neighboring cell of cell A.

Table 4-1 lists the information about cell A and cell B.

Table 4-1 Information about cell A and cell B

Cell PCI ECGI

Cell A 3 17

Cell B 5 19

Figure 4-2 shows how the eNodeB detects cell B through UE measurements.



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Figure 4-2 Procedure for detecting an intra-frequency neighboring cell through UE measurements

The procedure is described as follows:

1. The source eNodeB delivers the measurement configuration to the UE and requests the UE to measure the neighboring cells that meet the measurement configuration.

2. The UE detects that the PCI of cell B meets the measurement configuration and reports it to cell A. If the source eNodeB detects that its NCL does not include the PCI of cell B, it proceeds to the following step.

3. The source eNodeB instructs the UE, using the newly discovered PCI as a parameter, to read the ECGI, Tracking Area Code (TAC), and Public Land Mobile Network (PLMN) ID of cell B.

4. The source eNodeB schedules appropriate idle periods to allow the UE to read the ECGI, TAC, and PLMN ID of cell B over the broadcast channel (BCH).

5. The UE reports the detected ECGI, TAC, and PLMN ID of cell B to the source eNodeB.

The source eNodeB adds the newly detected neighboring cell to its NCL and adds the neighbor relation to the TempNRT.

4.1.3 Detecting Inter-Frequency or Inter-RAT Neighboring Cells Through UE Measurements

ANR can detect missing inter-frequency or inter-RAT neighboring cells through UE measurements. For details about the measurements on inter-frequency or inter-RAT neighboring cells, see the Mobility Management in Connected Mode Feature Parameter Description.


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Neighboring cells of CDMA2000 can be detected only by fast ANR, whereas neighboring cells of GERAN and UTRAN can be detected by either event-triggered ANR or fast ANR.

Assume that cell A is an E-UTRAN cell and cell B is a UTRAN cell and that they are involved in a handover. The UE is under the coverage of cell A, and cell B is an inter-RAT neighboring cell of cell A.

Table 4-2 lists the information about cell A and cell B.

Table 4-2 Information about cell A and cell B

Cell RAT PCI ECGI or CGI

Cell A E-UTRAN 3 17

Cell B UTRAN 5 19

Figure 4-3 shows how the eNodeB detects cell B through UE measurements.

Figure 4-3 Procedure for detecting an inter-RAT neighboring cell through UE measurements


1. The source eNodeB delivers the measurement configuration (including target RATs or EARFCNs) to the UE and schedules appropriate idle periods to allow the UE to measure the neighboring cells that meet the measurement configuration.



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2. The UE detects that the PCI of cell B meets the measurement configuration and reports it to cell A. If the source eNodeB detects that its NCL does not include the PCI of cell B, it proceeds to the following step.

3. The source eNodeB requests the UE to read the parameters of cell B, such as the CGI. 4. The source eNodeB schedules the UE to read the CGI and other parameters of cell B

over the BCH.

The other parameters to be read by the UE depend on the RAT used in cell B, as described below:

− If cell B is an inter-frequency E-UTRAN cell, the other parameters to be read by the UE are the ECGI, TAC, and PLMAN ID list.

− If cell B is a GERAN cell, the other parameters to be read by the UE are the CGI and RAC.

− If cell B is a UTRAN cell, the other parameters to be read by the UE are the CGI, LAC, and RAC.

− If cell B is a CDMA2000 cell, the other parameter to be read by the UE is the CGI.

5. The UE reports the CGI and other parameters to the source eNodeB.

The source eNodeB adds the newly detected neighbor relation to the inter-RAT NRT.

If cell B is an intra-RAT inter-frequency neighboring cell, the source eNodeB adds the newly detected neighboring cell to its NCL and adds the neighbor relation to the TempNRT.

4.1.4 Detecting Intra-Frequency or Inter-Frequency Neighboring Cells Through UE History Information

During a handover, the source eNodeB sends UE history information to the target eNodeB. ANR can detect missing neighboring cells through UE history information. The detection is only applicable to intra-RAT event-triggered ANR. Figure 4-4 shows the procedure for detecting an intra-frequency or inter-frequency neighboring cell through UE history information.

UE history information defined in 3GPP 36.413 [4] is the information about the cells that provided services for the UE. The information contains: - ECGI of the last visited cell - Type of the last visited cell - Duration of the UE for camping on the cell


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Figure 4-4 Procedure for detecting an intra-frequency or inter-frequency neighboring cell through UE history information


1. The source eNodeB sends a Handover Request message to the target eNodeB. 2. The target eNodeB obtains the UE history information from the message. If the target

eNodeB detects that the ECGI of the last visited cell does not exist in the NCL of the target cell, the last visited cell is considered as a new neighboring cell of the target cell.

3. The target eNodeB reports the ECGI of this new neighboring cell to the M2000. 4. The M2000 queries the information about the new neighboring cell based on the reported

ECGI and sends the information to the target eNodeB.

The target eNodeB adds the new neighboring cell to its NCL and adds the neighbor relation to the TempNRT.

4.2 Automatic Analysis of Neighbor Relations

4.2.1 Overview Automatic analysis of neighbor relations involves automatic analysis of neighbor relations in the TempNRT and automatic analysis of neighbor relations in the intra-RAT NRT. This function is not applicable to the inter-RAT NRT.

During automatic analysis of neighbor relations in the TempNRT, the eNodeB calculates the number of handovers and the handover success rate for a neighbor relation after the neighbor relation is added to the TempNRT. At the end of a statistic cycle (it is specified by the StatisticCycle parameter), the eNodeB checks the statistical result to analyze the neighbor relation. The neighbor relations that do not meet the requirements are removed from or kept in the TempNRT for later analysis. For details, see section 4.2.2 "Analyzing Neighbor Relations in the TempNRT."

During automatic analysis of neighbor relations in the intra-RAT NRT, the eNodeB calculates the number of handovers and the handover success rate for a neighbor relation after the neighbor relation is added to the intra-RAT NRT from the TempNRT. At the end of a statistic cycle, the eNodeB checks the statistical result to analyze the neighbor relation. The neighbor relations that meet the requirements are added to the intra-RAT



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NRT. For details, see section 4.2.3 "Analyzing Neighbor Relations in the Intra-RAT NRT."

Automatic analysis of neighbor relations ensures the effectiveness of neighbor relations. The neighbor relations in the intra-RAT NRT meet the requirements and therefore can ensure handover performance. In contrast, the neighbor relations in the TempNRT do not meet the requirements and therefore cannot ensure handover performance.

4.2.2 Analyzing Neighbor Relations in the TempNRT Figure 4-5 shows the process of automatically analyzing a neighbor relation in the TempNRT.

Figure 4-5 Process of automatically analyzing a neighbor relation in the TempNRT


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The eNodeB calculates the number of handovers and the handover success rate for a neighbor relation after the neighbor relation is added to the TempNRT. At the end of a statistic cycle, the eNodeB checks the statistical result to analyze the neighbor relation.

If the number of handovers is smaller than the value specified by the NRTCellHOStatNum parameter, the eNodeB keeps this neighbor relation in the TempNRT.

If the number of handovers is larger than or equal to the value specified by the NRTCellHOStatNum parameter and the handover success rate is higher than or equal to the value specified by the ANRAddCellThd parameter, the eNodeB adds this neighbor relation to the intra-RAT NRT.

If the number of handovers is larger than or equal to the value specified by the NRTCellHOStatNum parameter and the handover success rate is lower than or equal to the value specified by the ANRDelCellThd parameter, the eNodeB removes this neighbor relation from the TempNRT.

If the number of handovers is larger than or equal to the value specified by the NRTCellHOStatNum parameter and the handover success rate remains between the value specified by the ANRAddCellThd parameter and the value specified by the ANRDelCellThd parameter, the eNodeB keeps this neighbor relation in the TempNRT.

Then, the next statistic cycle starts.

4.2.3 Analyzing Neighbor Relations in the Intra-RAT NRT Figure 4-6 shows the process of automatically analyzing a neighbor relation in the intra-RAT NRT.



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Figure 4-6 Process of automatically analyzing a neighbor relation in the intra-RAT NRT

The eNodeB calculates the number of handovers and the handover success rate for a neighbor relation after the neighbor relation is added to the intra-RAT NRT. At the end of a statistic cycle, the eNodeB checks the statistical result to analyze the neighbor relation.

If the number of handovers is smaller than the value specified by the NRTCellHOStatNum parameter, the eNodeB keeps this neighbor relation in the intra-RAT NRT.

If the number of handovers is larger than or equal to the value specified by the NRTCellHOStatNum parameter and the handover success rate is lower than the value specified by the ANRAddCellThd parameter, the eNodeB removes this neighbor relation from the intra-RAT NRT and adds it to the TempNRT.

If the number of handovers is larger than or equal to the value specified by the NRTCellHOStatNum parameter and the handover success rate is higher than or equal to the value specified by the ANRAddCellThd parameter, the eNodeB keeps this neighbor relation in the intra-RAT NRT.

Then, the next statistic cycle starts.

When a network is in the early stage of deployment or when a network is unstable, the switches for automatically deleting neighbor relations can be turned off. The purpose is to analyze neighbor relations in the intra-RAT NRT in time and to protect the intra-RAT NRT


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from being modified frequently. In this situation, the eNodeB is not allowed to remove neighbor relations automatically from the intra-RAT NRT.

The switches for automatically deleting neighbor relations in the intra-RAT NRT and neighbor relations in the inter-RAT NRT are controlled by the IntraRatAnrAutoDelSwitch and InterRatAnrAutoDelSwitch checkboxes respectively.

4.3 Automatic Detection of PCI Collisions

4.3.1 Overview This section describes the optional feature LOFD-002007 PCI Collision Detection.

A PCI collision means the serving cell and a neighboring cell have the same PCI but different ECGIs. PCI collisions may be caused by improper network planning or abnormal neighboring cell coverage (also known as cross-cell coverage). If two neighboring cells have the same PCI, interference will be caused.

When a PCI collision occurs, the eNodeB cannot determine the target cell for a handover. In this situation, the handover performance deteriorates and the handover success rate reduces. Therefore, eliminating PCI collisions is an important issue for network optimization.

After a PCI collision is eliminated, the PCI is unique in the coverage area of the cell and unique in the neighbor relations of the cell.

For details, see sections 4.3.2 "Automatically Detecting PCI Collisions " and 4.3.3 "Reallocating PCIs."

Automatic detection of PCI collisions is an optional feature.

4.3.2 Automatically Detecting PCI Collisions After a neighbor relation is added to the NRT, the eNodeB compares the PCI of the new neighboring cell with the PCIs of existing neighboring cells if the IntraRatEventAnrSwitch checkbox is selected. If the PCI of the new neighboring cell is the same as that of an existing neighboring cell, the eNodeB reports a PCI collision to the M2000. The M2000 collects statistics about PCI collisions and generates a list of information about PCI collisions.

4.3.3 Reallocating PCIs PCI reallocation is a process of reallocating a new PCI to a cell whose PCI collides with the PCI of another cell. The purpose is to eliminate PCI collisions.

The M2000 triggers the PCI reallocation algorithm to provide suggestions on PCI reallocation.

After the PCI of a cell is changed, the cell needs to be reestablished and the services carried on the cell are disrupted. Therefore, the PCI reallocation algorithm only provides reallocation suggestions. A PCI can be reallocated manually or automatically through a scheduled task configured on the M2000.



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4.4 Automatic Detection of Abnormal Neighboring Cell Coverage

4.4.1 Overview Abnormal neighboring cell coverage refers to the coverage of a cell that is not adjacent to the serving cell but can be detected by a UE in the serving cell. Abnormal neighboring cell coverage decreases the handover success rate because of abnormal neighbor relations it has introduced. Therefore, detecting and eliminating abnormal neighboring cell coverage play an important role in network optimization.

If the IntraRatEventAnrSwitch checkbox is selected, the M2000 triggers the algorithm for detecting abnormal neighboring cell coverage and listing abnormal neighboring cells when:

The M2000 receives a notification that the eNodeB attempts to add a new neighbor relation to the NRT.

The M2000 receives an operator's request for querying the information about abnormal neighboring cell coverage.

For details about how to detect and query abnormal neighboring cell coverage, see sections 4.4.2 "Automatically Detecting Abnormal Neighboring Cell Coverage" and 4.4.3 "Querying the List of Abnormal Neighboring Cell Coverage " respectively.

4.4.2 Automatically Detecting Abnormal Neighboring Cell Coverage

Assume that cell A and cell B are involved in a handover. The UE is under the coverage of cell A, and cell B may be an abnormal neighboring cell of cell A. Figure 4-7 shows the process of detecting abnormal neighboring cell coverage.


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Figure 4-7 Process of detecting abnormal neighboring cell coverage

The process of detecting abnormal neighboring cell coverage is as follows:

1. The M2000 triggers the algorithm for detecting abnormal neighboring cells. 2. It queries the longitudes and latitudes of cell A (serving cell) and cell B (target cell). 3. It calculates the distance between cell A and cell B. 4. It checks whether the distance between cell A and cell B exceeds the maximum distance

between two normal neighboring cells. If yes, go to step 5. If no, the coverage of cell B is considered as normal.

5. It calculates the number of layers between cell A and cell B.

The number of layers between cell A and cell B refers to the number of non-intra-eNodeB neighboring cells dropping in the circle whose diameter is the line connecting the centers of the two cells.



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6. It checks whether the number of layers exceeds the maximum value. If yes, the coverage of cell B is considered abnormal. If no, the coverage of cell B is considered as normal.

4.4.3 Querying the List of Abnormal Neighboring Cell Coverage The M2000 collects statistics about abnormal neighboring cell coverage and generates a list of abnormal neighboring cells. Operators can query the list on the M2000.

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5 Fast ANR

This chapter describes fast ANR corresponding to the following optional features:

LOFD-002001 Automatic Neighbour Relation(ANR) LOFD-002002 Inter-RAT ANR

Before a UE performs handovers, the eNodeB can obtain the information about all

e

at a

procedure for detecting missing

ork. Therefore, fast ntra-RAT or inter-RAT periodic

measurements. When the number of involved UEs reaches the corresponding upper limit, the

st ANR

reaches the corresponding upper limit at a regular interval, which is specified by the FastAnrCycleTimer parameter. The

neighboring cells with certain Reference Signal Received Power (RSRP) (it is specified by the FastAnrRsrpThd parameter) through the reporting of periodic UE measurements. This reduces the impact of event-triggered UE measurements on handover performance when the UE performs handovers.

Fast ANR is classified into intra-RAT fast ANR and inter-RAT fast ANR. They are controlled by the IntraRatFastAnrSwitch and InterRatFastAnrSwitch checkboxes respectively. Thcorresponding ANR function is enabled if the relevant parameter is set to ON.

After fast ANR is enabled, the eNodeB detects missing neighboring cells through periodic UEmeasurements of intra-frequency, inter-frequency, or inter-RAT neighboring cells. The UEinvolved in periodic measurements reports all detected neighboring cells to the eNodeBregular interval, which is specified by the FastAnrRprtInterval parameter. Then, the eNodeB adds the missing neighboring cells to the NCL. Theneighboring cells through fast ANR is the same as that through event-trigged ANR that is based on UE measurements. For details, see sections 4.1.2 "Detecting Intra-Frequency Neighboring Cells Through UE Measurements" and 4.1.3 "Detecting Inter-Frequency or Inter-RAT Neighboring Cells Through UE Measurements."

Periodic UE measurements decrease the uplink throughput of the netwANR restricts the number of concurrent UEs involved in i

eNodeB automatically disables fast ANR until a UE stops periodic measurements. The two upper limits are specified by the FastAnrIntraRatMeasUeNum and FastAnrInterRatMeasUeNum parameters respectively.

Periodic measurements also increase the power consumption of a UE. Therefore, fast ANR restricts the number of periodic measurement reports by each UE. When the number of periodic measurement reports by a UE reaches the upper limit, the eNodeB automatically disables fast ANR. The upper limit is specified by the FastAnrRprtAmount parameter.

The total number of neighboring cells that meet the RSRP requirement is limited, and periodic UE measurements decrease the uplink throughput of the network. Therefore, farestricts the total number of UEs involved in intra-RAT or inter-RAT periodic measurements. The eNodeB checks whether the total number of involved UEs

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two upper limits are specified by the FastAnrIntraRatCumuUeNumThd and FastAnrInterRatCumuUeNumThd parameters respectively. If yes, the eNodeB automatically disables fast ANR. If no, periodic UE measurements continue.

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6 Manual Management of Neighbor Relations

Ge rally, neighbor relations are manne aged by ANR automatically. In some special cases, they b

The tasks of manual management of neighbor relations are as follows:

elation or removed manually. If ANR is enabled,

6.2 Blacklis iA ne y

A neighbor relation is added to the HO blacklist if one of the following conditions is met:

ccess rate but does not reach the or relation.

6.3 Whitel

A neighbor relation is added to the HO whitelist in some special cases. The following is an example. An eNodeB must stop servicing if it needs to be maintained for a long period. As a

can e managed manually.

Adding or removing a neighbor relation Blacklisting a neighbor relation Whitelisting a neighbor relation

6.1 Adding or Removing a Neighbor RIf ANR is not enabled, a neighbor relation is added a neighbor relation is added or removed automatically.

t ng a Neighbor Relation ighbor relation in the HO blacklist cannot be automatically removed from the NRT b

ANR or used for a handover.

The neighbor relation leads to a low handover suthreshold for automatically removing the neighb

The neighbor relation is removed and added frequently, causing a ping-pong effect.

isting a Neighbor Relation A neighbor relation in the HO whitelist cannot be automatically removed from the NRT by ANR but can be used for a handover.

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result, the NRTs of this eNodeB and its surrounding eNodeBs change significantly. To prevent such changes and future time-consuming re-establishment of neighbor relations through ANR, telecom operators add associated neighbor relations to the HO whitelist. Thus, these neighbor relations cannot be removed, and the eNodeB need not establish them after it resumes.

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7 Engineering Guidelines

This chapter provides engineering guidelines regarding the configuration of the ANRmanagement feature.

Event-triggered ANR and fast ANR are controlled by the checkboxes under the SONAnrAlgoSwitch paramete

r. These checkboxes are IntraRatEventAnrSwitch, InterRatEventAnrSwitch, IntraRatFastAnrSwitch, InterRatFastAnrSwitch, IntraRatAnrAutoDelSwitch, and InterRatAnrAutoDelSwitch. For details, see sections 7.1

ng Fast ANR", and 7.3 "Automatically

7.1 Confighe

Intra heckboxes respectively. It is r om

nd

Even

ments increase the delay of UE handover from the serving cell to the target

E, which affects the QoS

It is ve impacts of A R

The handover success rate in a cell of an eNodeB reaches the conditions for a long time, indicating that neighbor relations managed by the eNodeB are normal.

Operators intend to manage the neighbor relations of a cell manually.

"Configuring Event-Triggered ANR", 7.2 "ConfiguriDeleting Neighbor Relations."

uring Event-Triggered ANR

Intra-RAT event-triggered ANR and inter-RAT event-triggered ANR are controlled by tRatEventAnrSwitch and InterRatEventAnrSwitch c

ec mended that event-triggered ANR be enabled in either of the following scenarios:

At the early phase of network deployment, no neighbor relations are planned aneighboring cells need to be automatically established.

During network capacity expansion, the coverage of a cell changes significantly. Its neighboring cells need to be reestablished, and the NCL needs to be updated.

t-triggered ANR has the following negative impacts on network performance:

UE measurecell.

UE measurements increase the data transmission delay of the Uof the UE.

recommended that event-triggered ANR be disabled to reduce the negatiN on network performance in either of the following scenarios:

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7.2 Configuring Fast ANR 7.2.1 Switches for Fast ANR

Intra-RAT fast ANR and inter-RAT fast ANR are controlled by the IntraRatFastAnrSwitch and InterRatFastAnrSwitch checkboxes respectively. It is recommended that fast ANR be enabled in either of the following scenarios:

The number of UEs involved in periodic measurements is small (for example, the average number of such UEs in a cell does not exceed 5) and the probability of reading the ECGI is low.

At the early phase of network deployment or during network capacity expansion, neighboring cells need to be automatically established.

Enabling fast ANR increases the power consumption of a UE during periodic measurements. It is recommended that fast ANR be disabled if the neighbor relations of a cell will not change and the handover success rate has reached the conditions for a long time. The total number of UEs involved in intra-RAT or inter-RAT periodic measurements reaches the corresponding upper limit, the eNodeB automatically disables fast ANR. The two upper limits are specified by the FastAnrIntraRatCumuUeNumThd and FastAnrInterRatCumuUeNumThd parameters respectively.

7.2.2 Fast ANR-Related Parameter Settings In different scenarios, fast ANR performance increases significantly after the following parameters are reconfigured and optimized:

FastAnrRsrpThd FastAnrIntraRatMeasUeNum or FastAnrInterRatMeasUeNum FastAnrRprtInterval FastAnrRprtAmount FastAnrIntraRatCumuUeNumThd or FastAnrInterRatCumuUeNumThd

The parameter settings are described as follows:

The FastAnrRsrpThd parameter specifies the threshold for reporting a neighboring cell that meets the RSRP requirement during periodic UE measurements. The value of this parameter has a positive correlation with the RSRP requirement for a neighboring cell. Therefore, a neighboring cell that is to be added to the NCL has a high requirement for the RSRP. For example, in the dense urban areas with a large number of neighboring cells, a large value is recommended for the parameter so that the neighboring cells with low RSRP values cannot be added to the NCL. In contrast, in open areas such as the suburban or sparely populated areas, a small value is recommended for the parameter so that the neighboring cells with low RSRP values under the edge coverage can be added to the NCL.

The FastAnrIntraRatMeasUeNum and FastAnrInterRatMeasUeNum parameters specify the upper limits of concurrent UEs involved in intra-RAT periodic measurements and inter-RAT periodic measurements respectively. The value of the corresponding parameter has a positive correlation with the number of concurrent UEs involved in corresponding periodic measurements. Therefore, neighboring cells can be detected fast. However, periodic measurements cause a negative impact on the QoS of more and more UEs and cause a significant decrease in the uplink throughput of the network.

The FastAnrRprtInterval parameter specifies the interval for the reporting of periodic UE measurements. The value of this parameter has a negative correlation with the moving speed

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of a UE. If the UE moves fast and performs frequent handovers between neighboring cells, the parameter can be set to a small value. Otherwise, the parameter can be set to a large value.

The FastAnrRprtAmount parameter specifies the number of periodic measurement reports by a UE. The value of this parameter also determines the time taken by a UE for periodic measurements. The value of the parameter has a positive correlation with the time taken by a UE for periodic measurements. Therefore, more neighboring cells are reported. However, the time during which the QoS of the UE is affected is prolonged and the power consumption of the UE is increased.

The FastAnrIntraRatCumuUeNumThd and FastAnrInterRatCumuUeNumThd parameters determine the conditions for automatically disabling intra-RAT fast ANR and inter-RAT fast ANR respectively. They directly affect the effectiveness of the corresponding fast ANR. The value of the corresponding parameter has a positive correlation with the total number of UEs involved in corresponding periodic measurements. Therefore, the UEs are extensively distributed and the risk of the occurrence of missing neighboring cells is reduced. However, this increases the negative impacts on the QoS of the UEs and on the uplink throughput of the network.

7.3 Automatically Deleting Neighbor Relations The switches for automatically deleting an intra-RAT neighbor relation and an inter-RAT neighbor relation are controlled by the IntraRatAnrAutoDelSwitch and InterRatAnrAutoDelSwitch checkboxes respectively. If the relevant switch is turned off, the eNodeB is not allowed to remove neighbor relations automatically from the NRT.

When a network is in the early stage of deployment or when a network is unstable, the switches can be turned off. The purpose is to analyze neighbor relations in the NRT in time and to protect the NRT from being modified frequently. In this situation, the eNodeB is not allowed to remove abnormal neighbor relations automatically from the NRT. This may cause UE handovers to abnormal neighboring cells, decrease the handover success rate, and increase costs of handling abnormal neighbor relations.

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8 Parameters

This chapter describes the parameters related to the ANR management feature.

tion of each parameter, see Table 8-1. For the default value, value ranges, and o , see Table 8-2.

T meter 1)

For the descripMML commands f each parameter

able 8-1 Para description (

MO Parameter ID Description

GeranNcell NoHoFlag f UEs to the neighboring cell are Indicates whether handovers oprohibited.

GeranNcell NoRmvFlag er to allow automatic removal of the neighboring relation Indicates wheththrough the ANR algorithm.

Cdma2000Hrpd NoHoFlag s to the associated neighboring cell Ncell

Indicates whether handovers of UEare prohibited.

Cdma2000Hrpd NoRmvFlag er automatic removal of the neighboring relation through Ncell

Indicates wheththe ANR algorithm is prohibited.

Cdma20001XR NoHoFlag s to the associated neighboring cell TTNcell

Indicates whether handovers of UEare prohibited.

Cdma20001XR NoRmvFlag e neighboring relation through TTNcell

Indicates whether automatic removal of ththe ANR algorithm is prohibited.

UtranNCell NoHoFlag ndover of UEs to the neighboring cell that is Indicates whether to allow hadetermined by the neighboring relation.

UtranNCell NoRmvFlag ether to allow automatic removal of the neighbor relation Indicates whthrough the ANR algorithm.

EutranIntraFreq NoHoFlag f UEs to the neighboring cell are NCell

Indicates whether handovers oprohibited.

EutranIntraFreq NoRmvFlag ether to allow automatic removal of the neighbor relation NCell

Indicates whthrough the ANR algorithm.

EutranInterFreqNCell

NoHoFlag f UEs to the neighboring cell are prohibited. Indicates whether handovers o

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NoRmvFlag Indicates whether to allow automatic removal of the neighbor relationthrough the ANR algorithm.

EnodeBAlgoSwitch

SONAnrAlgoSwitch

.

bled .

bled

elations

lations

IntraRatEventAnrSwitch:Indicates the switch of the intra-RAT ANR algorithm.If this switch is set to ON, the automatic maintenance of intra-RAT neighboring relations is performed by using the intra-RAT ANR algorithm. If this switch is set to OFF, the intra-RAT ANR algorithm is disabledInterRatEventAnrSwitch:Indicates the switch of the inter-RAT ANRalgorithm. If this switch is set to ON, the automatic maintenance of inter-RAT neighboring relations is performed by using the inter-RAT ANR algorithm. If this switch is set to OFF, the inter-RAT ANR algorithm is disabled. IntraRatFastAnrSwitch:Indicates the switch of the intra-RAT fast ANR algorithm. If this switch is set to ON, the intra-RAT fast ANR algorithm is enaso that intra-RAT neighboring relations can be collected in a fast mannerIf this switch is set to OFF, the intra-RAT fast ANR algorithm is disabled. InterRatFastAnrSwitch:Indicates the switch of the inter-RAT fast ANR algorithm. If this switch is set to ON, the inter-RAT fast ANR algorithm is enaso that inter-RAT neighboring relations can be collected in a fast manner.If this switch is set to OFF, the inter-RAT fast ANR algorithm is disabled. IntraRatAnrAutoDelSwitch:Indicates the switch of automatic removel by intra-RAT ANR. If this switch is set to ON, the automatic removal of neighboring rthrough the intra-RAT ANR algorithm is allowed. If this switch is set to OFF, the automatic removal of neighboring relations through the intra-RAT ANR algorithm is not allowed. InterRatAnrAutoDelSwitch:Indicates the switch of automatic removal by inter-RAT ANR. If this switch is set to ON, the automatic removal of neighboring rethrough the inter-RAT ANR algorithm is allowed. If this switch is set to OFF, the automatic removal of neighboring relations through the inter-RAT ANR algorithm is not allowed.

ANR ANRAddCellThd d is the percentage of the number of

Indicates the threshold above which a neighboring cell is added to the NRT by ANR. The thresholsuccessful handovers from the serving cell to the neighboring cell to the total number of handovers.

ANR ANRDelCellThd d is the percentage of the number of

Indicates the threshold below which a neighboring cell is removed from the NRT by ANR. The thresholsuccessful handovers from the serving cell to the neighboring cell to the total number of handovers.

ANR NRTCellHOStatNum

Indicates the number of handovers based on which ANR makes decisions on neighboring relation setup or removal.

ANR StatisticCycle Indicates the period during which the number of handovers is measured by ANR to make decisions on neighboring relation setup or removal.



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ANR FastAnrRprtAmount

Indicates the number of periodic measurement reports sent for fast ANR.

ANR FastAnrRprtInterval

r Indicates the interval at which periodic measurement reports are sent fofast ANR.

ANR FastAnrCycleTimer

Indicates the fast ANR checking timer. When the timer is expired, the eNodeB automatically checks whether to disable fast ANR.

ANR FastAnrRsrpTh e signal quality in a d

Indicates the RSRP threshold for fast ANR. If thneighboring cell reported by the UE is lower than the threshold, the cell is not automatically added to the NRT.

ANR FastAnrIntraRatMeasUeNum

easurements for fast ANR reaches the maximum number,

Indicates the maximum allowed number of UEs that perform intra-RATmeasurements for fast ANR. After the number of UEs performing intra-RAT mintra-RAT measurements for fast ANR will not be performed on other UEs.

ANR FastAnrInterRatMeasUeNum

measurements for fast ANR reaches the maximum number,

Indicates the maximum allowed number of UEs that perform inter-RATmeasurements for fast ANR. After the number of UEs performing inter-RAT inter-RAT measurements for fast ANR will not be performed on other UEs.

ANR FastAnrIntraRa number of UEs that have performed tCumuUeNumThd

Indicates the minimum requiredmeasurements for fast ANR before intra-RAT fast ANR can be automatically disabled.

ANR FastAnrInterRauUeNum

Thd

number of UEs that have performed measurements for fast ANR before inter-RAT fast ANR can be automatically disabled.

Indicates the minimum requiredtCum

Table 8-2 meter des 2) Para cription (

MO Parameter Default Value

GUI Value Range Actual Value Range

Unit MML Command ID

GeranNcell

NoHoFlag PERMIT_ENU

None ADD GERANNCELL HO_M(Permit Ho)

PERMIT_HO_ENUM(Permit Ho) FORBID_HO_ENUM(Forbid Ho)

PERMIT_HO_ENUM, FORBID_HO_ENUM

MOD GERANNCELL

GeranNcell

NoRmvFlag

v)

None ADD GERANNCELL PERMIT_RMV_ENUM(Permit Rmv)

PERMIT_RMV_ENUM(Permit Rmv)FORBID_RMV_ENUM(Forbid Rm

PERMIT_RMV_ENUM, FORBID_RMV_ENUM

MOD GERANNCELL

Cdma2000HrpdNcell

NoHoFlag PERMIT_ENU

M(Permit Ho)

FORBID_HO_ENUM(Forbid Ho)

FORBID_HO_ENUM

None ADD

2000HRPDNCE

HO_PERMIT_HO_ENUM(Permit Ho)

PERMIT_HO_ENUM, CDMA2000HRPDNCE

LL MOD CDMA

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MO Parameter Default GUI Value Range Actual Value Unit MML Command ID Value Range

LL

Cdma2000HrpdNcell

NoRmvFlag

UM(Permit Rmv)

FORBID_RMV_ENUM(Forbid Rmv)

FORBID_RMV_ENUM

None ADD

2000HRPDNCE

PERMIT_RMV_EN

PERMIT_RMV_ENUM(Permit Rmv)

PERMIT_RMV_ENUM, CDMA2000HRPDNCE

LL MOD CDMALL

Cdma20001XRTTNc

NoHoFlag PERMIT_ENU

M(Permit Ho)


FORBID_HO_ENUM

None ADD

20001XRTTNCell


PERMIT_HO_ENUM, CDMA20001XRTTNC

ELL MOD CDMAELL

Cdma20001XRTTNc

NoRmvFlag

UM(Permit Rmv)


FORBID_RMV_ENUM

None ADD

ell

PERMIT_RMV_EN


PERMIT_RMV_ENUM, CDMA20001XRTTNC

ELL MOD CDMA20001XRTTNCELL

UtranNCell

NoHoFlag PERMIT_ENU

None ADD UTRANNCELL HO_M(Permit Ho)

PERMIT_HO_ENUM(Permit Ho) FORBID_HO_ENUM(Forbid Ho)

PERMIT_HO_ENUM, FORBID_HO_ENUM

MOD UTRANNCELL

UtranNCell

NoRmvFlag

v)

None ADD UTRANNCELL PERMIT_RMV_ENUM(Permit Rmv)

PERMIT_RMV_ENUM(Permit Rmv)FORBID_RMV_ENUM(Forbid Rm

PERMIT_RMV_ENUM, FORBID_RMV_ENUM

MOD UTRANNCELL

EutranIntraFreqNCell

NoHoFlag PERMIT_ENU

M(Permit Ho)


FORBID_HO_ENUM

None ADD

ANINTRAFREQ


PERMIT_HO_ENUM, EUTRANINTRAFREQ

NCELL MOD EUTRNCELL

EutranIntraFreqNCell

NoRmvFlag

UM(Permit Rmv)


FORBID_RMV_ENUM

None ADD

ANINTRAFREQ

PERMIT_RMV_EN


PERMIT_RMV_ENUM, EUTRANINTRAFREQ

NCELL MOD EUTRNCELL


NoHoFlag PERMIT_ENU

M(Permit Ho)


FORBID_HO_ENUM

None ADD

ANINTERFREQ


PERMIT_HO_ENUM, EUTRANINTERFREQ

NCELL MOD EUTR



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NCELL


NoRmvFlag

UM(Permit Rmv)


FORBID_RMV_ENUM

None ADD

NINTERFREQ

PERMIT_RMV_EN


PERMIT_RMV_ENUM, EUTRANINTERFREQ

NCELL MOD EUTRANCELL

EnodeBAlgoSwitch

SONAnrAlgoSwitch

None

tAnrAutoDe

lSwitch atAnrAut

oDelSwitch

None MOD ENODEBALGOSWITCH

IntraRatEventAnrSwitch, InterRatEventAnrSwitch, IntraRatFastAnrSwitch, InterRatFastAnrSwitch, IntraRatAnrAutoDelSwitch,InterRa

IntraRatEventAnrSwitch, InterRatEventAnrSwitch, IntraRatFastAnrSwitch, InterRatFastAnrSwitch, IntraRatAnrAutoDelSwitch, InterR

ANR ANRAddCellThd

80 0~100 0~1 % MOD ANR

ANR ANRDelCellThd

60 0~100 0~1 % MOD ANR

ANR NRTCellHOStatNum

200 1~10000 1~10000 None MOD ANR

ANR StatisticCycle

1440 1~10080 1~10080 min MOD ANR

ANR FastAnrRprtAmount

r64(64) ,

, r8, r16, r32, r64,

None MOD ANR r1(1), r2(2), r4(4)r8(8), r16(16), r32(32), r64(64), infinity(infinity)

r1, r2, r4

infinity

ANR FastAnrRprtInterval

2048ms

ms, 1min, 6min, 12min, 30min, 60min

0ms, 0ms,

in, min,

60min

ms MOD ANR 120ms, 240ms, 480ms, 640ms, 1024ms, 2048ms, 5120ms, 10240

120ms, 24480ms, 641024ms, 2048ms, 5120ms, 10240ms, 1min, 6m12min, 30

ANR FastAnrCycleTimer

60 1~10080 1~10080 min MOD ANR

ANR FastAnrRsrpThd

-102 0 0 -130~-7 -130~-7 dBm MOD ANR

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ANR rIntr 5 1~200 1~200 None MOD ANR FastAnaRatMeasUeNum

ANR nt 5 1~200 1~200 None MOD ANR FastAnrIerRatMeasUeNum

ANR atCumu

20 1~10000 1~10000 None MOD ANR FastAnrIntraRUeNumThd

ANR atCum

uUeNumThd

20 1~10000 1~10000 None MOD ANR FastAnrInterR

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9 Counters

For details about the counters related to the ANR management feature, see the eNodeB Performance Counter Reference [5].

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10 Glossary

10.1 Terms

10.2 Acronyms and Abbreviations n

CN dio Frequency Channel Number

I al Identifier

ntifier

etwork

eived Power

ork

TAC Tracking Area Code

TCI Target Cell Identifier

None.

ANR Automatic Neighbor Relatio

BCH Broadcast Channel

BSIC Base Station Identity Code

EARF E-UTRAN Absolute Ra

ECG E-UTRAN Cell Glob

LAC Location Area Code

LCI Local Cell Identifier

NCL Neighbor Cell List

NRT Neighbor Relation Table

OM Operation and Maintenance

PCI Physical Cell Ide

PLMN Public Land Mobile N

PN Pseudo Number

RAC Routing Area Code

RAT Radio Access Technology

RSRP Reference Signal Rec

SON Self-Organization Netw

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11 Reference Documents

This chapter lists the reference documents related to the ANR management feature:

NR) management; Concepts and

tion"

RAN S1 Application Protocol (S1AP)"

[5] eNodeB Performance Counter Reference

[6] eNodeB MO Reference

[1] 3GPP TS 32.511, "Automatic Neighbor Relation (Arequirements"

[2] 3GPP TS 36.300, "E-UTRAN Overall description"

[3] 3GPP TS 36.331, "RRC Protocol specifica

[4] 3GPP TS 36.413, "E-UT