bandwidth sharing of mbts multi-mode co-transmission(ran13.0_01)

Bandwidth Sharing of MBTS Multi-Mode Co-Transmission SRAN6.0

Feature Parameter Description

Issue 01

Date 2011-03-30

HUAWEI TECHNOLOGIES CO., LTD.

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

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Bandwidth Sharing of MBTS Multi-Mode

Co-Transmission Contents

Issue 01 (2011-03-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd

i

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 Bandwidth Sharing of MBTS Multi-Mode Co-Transmission .................. 2-1

3 Technical Description .............................................................................................................. 3-1

3.1 Overview ....................................................................................................................................... 3-1

3.2 Transmission Policy ...................................................................................................................... 3-1

3.3 Load control ................................................................................................................................... 3-1

3.4 Uplink BW Adaptive Adjustment Algorithm .................................................................................... 3-1

4 Engineering Guidelines ........................................................................................................... 4-1

5 Parameters ................................................................................................................................. 5-1

6 Counters ...................................................................................................................................... 6-1

7 Glossary ...................................................................................................................................... 7-1

8 Reference Documents ............................................................................................................. 8-1

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Co-Transmission 1 Introduction



1-1

1 Introduction

1.1 Scope

The bandwidth sharing of MBTS multi-mode co-transmission feature provides a transmission resource management (TRM) solution for the scenario where,

The GSM+UMTS (GU) common transmission (Co-transmission) based on IP over FE/GE or IP over E1 is used on the MBTS side.

The BSC and RNC are deployed separately, or the BSC6900 is deployed, providing independent physical ports for the Abis and Iub interfaces.

The transmission on the base station controller side is based on IP over FE/GE or IP over E1.

This feature corresponds to MRFD-211505 Bandwidth sharing of MBTS Multi-mode Co-Transmission(GBTS) and MRFD-221505 Bandwidth sharing of MBTS Multi-mode Co-Transmission(NodeB).

Before reading this document, you need to be familiar with the Transmission Resource Management Feature

Parameter Description.

In this document, the MBTS refers to the GU MBTS, the BTS refers to the MBTS performing the functions of a GSM base station, the NodeB refers to the MBTS performing the functions of a UMTS base station.

In this document, the BSC6900 refers to the GU MBSC.

1.2 Intended Audience

This document is intended for:

Personnel who are familiar with WCDMA and GSM basics

Personnel who need to understand the bandwidth sharing of MBTS multi-mode co-transmission feature

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 bandwidth sharing of MBTS multi-mode co-transmission 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:

01 (2011-03-30)

Draft A (2010-12-30)

01 (2011-03-30)

This is the document for the first commercial release of SRAN6.0.

Compared with issue Draft A (2010-12-30) of SRAN6.0, this issue optimizes the description.

Transmission%20Resource%20Management.htm


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Co-Transmission 1 Introduction



1-2

Draft A (2010-12-30)

This is the draft of the document for SRAN6.0.

Compared with issue 01 (2010-10-15) of SRAN5.0, this issue optimizes the description.

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Co-Transmission

2 Overview of Bandwidth Sharing of MBTS

Multi-Mode Co-Transmission



2-1

2 Overview of Bandwidth Sharing of MBTS Multi-Mode Co-Transmission

There is a large margin for multiplexing transmission resources because peak load shifts between GSM and UMTS services. In this situation, operators can employ GU co-transmission solution to save transmission resources, and adopt the TRM algorithm to guarantee the continuity of high-priority services, avoid possible mutual effect between GSM and UMTS services, and improve the utilization efficiency of transmission resources.

As shown in Figure 2-1, the bandwidth sharing of MBTS multi-mode co-transmission feature is applicable to the scenarios that meet the following requirements:

On the base station controller side, the BSC and RNC are deployed separately. Alternatively, the BSC6900 is deployed, providing independent physical ports for the Abis and Iub interfaces.

On the base station side, the MBTS is deployed, and implements IP co-transmission based on IP over FE/GE or IP over E1. The MBTS provids a common physical port for the Abis and Iub interfaces.

The transmission networking is of one of the following modes:

− The transmission on the BSC6900 and the MBTS side are both based on IP over FE/GE.

− The transmission on the BSC6900 side is based on IP over FE/GE, while the transmission on the MBTS side is based on IP over E1.

− The transmission on the BSC6900 and the MBTS side are both based on IP over E1.

Figure 2-1 Application scenario

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Co-Transmission 3 Technical Description



3-1

3 Technical Description

3.1 Overview

The TRM solution for this feature is as follows:

The common transmission policy for GSM and UMTS services is made by configuring parameters regarding transmission priority and transmission bandwidth (BW).

Flow control is used:

− Load control and the NodeB uplink BW adaptive adjustment algorithm are used for UMTS services.

− Load control is used for GSM services.

3.2 Transmission Policy

The GSM and UMTS transmission priorities are configured in a centralized manner to indicate the priority of the GSM services or UMTS services for occupying the transmission resources. Operators can assign different priorities to GSM and UMTS services, and services with different priorities correspond to different DSCP values. In this way, both systems and services are taken into consideration in the transmission priority configuration.

When transmission congestion occurs at a node in the transport network, this node preferentially forwards data packets for high-priority services based on DSCP values. This guarantees that GSM and UMTS high-priority services are processed continuously.

When the demand for GSM services decreases or even becomes unnecessary, the bandwidth is gradually occupied by UMTS services. This ensures that the transmission resources are dynamically shared between GSM and UMTS services.

For details about the transmission priorities, see the Transmission Resource Management Feature Parameter Description.

It is recommended that a minmum BW be reserved for UMTS services to prevent the peak rate of the GSM services from affecting the UMTS services.

3.3 Load control

Load control involves admission control, LDR, and OLC.

The GSM and UMTS services use admission control to prevent over-admission that leads to congestion, packet loss, and retransmission at the transmission convergence nodes, and guarantees the quality of admitted services. To prevent congestion, LDR is used, which reduces transmission load, and increases admission success rate and system capacity. When congestion occurs, OLC is used to quickly eliminate overload, minimizing the impact of overload on high-priority users.

For details about load control, see the Transmission Resource Management Feature Parameter Description.

3.4 Uplink BW Adaptive Adjustment Algorithm

The switch for the uplink BW adaptive adjustment algorithm on the NodeB side is turned on by default. The NodeB automatically monitors congestion on the transport network, and dynamically adjusts the maximum available BW on the Iub interface according to the algorithm. On detecting transmission congestion, the NodeB will automatically reduce the BW allocated to low-priority services based on the service priority policies, eliminating congestion. This ensures that the transmission BW actually occupied by GSM/UMTS services always approaches the bottleneck BW. For details about the uplink BW





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Co-Transmission 3 Technical Description



3-2

adaptive adjustment algorithm on the NodeB side, see the Transmission Resource Management Feature Parameter Description.



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Co-Transmission 4 Engineering Guidelines



4-1

4 Engineering Guidelines Configure LP and paths for GSM and UMTS services.

− (Optional) Run ADD IPLOGICPORT to add an IP LP.

− Run ADD IPPATH to add an IP path.

If an LP is configured, the parameter CARRYFLAG needs to be set to IPLGCPORT to carry the path on the LP.

It is recommended that a TRM load threshold (TRMLOADTH) table should be configured on the GSM and UMTS LP/path separately. The MML command ADD TRMLOADTH is used to add a TRMLOADTH table. If a default TRMLOADTH table is used, set the TRMLOADTHINDEX parameter to 3 when adding an LP or path.

Table 4-1 describes the recommended transmission BW configurations.

Table 4-1 Recommended transmission BW configurations

Types of Transmission BW Recommended Configurations

LP BW of GSM CIR = the bottleneck BW of GU – minimum (Min) reserved BW of UMTS (DL)

LP BW of UMTS If the IP PM function is enabled:

MAXBW = the bottleneck BW of GU

MINBW >= Min reserved BW of UMTS

If the IP PM function is disabled:

CIR = the bottleneck BW of GU

Path BW of GSM/UMTS If QoS path is configured:

The total path BW of GU >= the bottleneck BW of GU – signaling reserved BW of GSM

If non-QoS path is configured:

Each path BW = total BW of all the services carried on the path

The total path BW of GU >= the bottleneck BW of GU – signaling reserved BW of GSM

Configure the transmission priorities.

− Set the GSM and UMTS service priorities so that they meet the following requirements: GSM RT service priority > UMTS RT service priority > GSM NRT service priority > UMTS NRT service priority.

− Run ADD TRMMAP to set the priorities of the GSM and UMTS service on the BSC and RNC side.

− Run SET BSCABISPRIMAP to set the DSCP priorities of the GSM OML, RSL, and ESL signaling on the BSC side.

− Run ADD SCTPLNK to set the DSCP priorities of the UMTS NCP and CCP signaling on the RNC side.

− Run SET BTSVLAN to set the DSCP priorities of the GSM service and signaling on the BTS side. Ensure that the mapping rules of SERVICETYPE and DSCP on the BTS side are consistent with those on the BSC side.

− Run ADD IPPATH to set the DSCP priorities of UMTS services on the NodeB side. Ensure that the DSCP priorities on the NodeB side are consistent with those on the RNC side.

../RNCParaHtml/mbsc/m-para/ippath_carryflag.html

../RNCParaHtml/mbsc/m-para/trmloadth_trmloadthindex.html

../RNCParaHtml/mbsc/m-para/iplogicport_cir.html

../RNCParaHtml/mbsc/m-para/iplogicport_maxbw.html

../RNCParaHtml/mbsc/m-para/iplogicport_minbw.html


../RNCParaHtml/mbsc/m-para/btsvlan_servicetype.html

../RNCParaHtml/mbsc/m-para/btsvlan_dscp.html

../NodeBParaHtml/mml-mo-para/para/IPPATH-DSCP.html

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Co-Transmission 4 Engineering Guidelines



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− Run SET DIFPRI to set the DSCP priorities of UMTS signaling on the NodeB side. Ensure that the DSCP priority of SIGPRI on the NodeB side are consistent with those on the RNC side.

(Optional only when the transmission is based on IP over FE/GE and the transmission bottleneck bandwidth is variable) Enable the dynamic adjustment of LP bandwidth function on the BSC and RNC sides.

1. Run ADD IPLOGICPORT to set BWADJ to ON to turn on the the dynamic adjustment switch.

2. Run ACT IPPM to activate the IP PM function.

../NodeBParaHtml/mml-mo-para/para/DIFPRI-SigPri.html

../RNCParaHtml/mbsc/m-para/iplogicport_bwadj.html

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Co-Transmission 5 Parameters



5-1

5 Parameters

Table 5-1 Parameter description

Parameter ID NE MML Command Description

BWADJ BSC6900 ADD IPLOGICPORT(Mandatory)

MOD IPLOGICPORT(Optional)

Meaning:Switch for adjusting the dynamical bandwidth of the logical port. If this switch is turned on, the system adjusts the dynamical bandwidth of the logical port according to the transmission quality of the link monitored by the IPPM. After this switch is turned on, the IPPM function must be activated on the IPPATH of this logical port. For details about the IPPM, see the description of the command "ACT IPPM

GUI Value Range:OFF(OFF), ON(ON)

Actual Value Range:OFF, ON

Default Value:None

CARRYFLAG BSC6900 ADD IPPATH(Optional)

MOD IPPATH(Optional)

Meaning:Carry Flag of IP path

IPLGCPORT: indicates that the IP Path is carried on the IP logic port;

RSCGRP: indicates that the IP Path is carried on the resource group;

NULL: indicates that the IP Path is carried on the physics port

GUI Value Range:NULL(NULL), IPLGCPORT(IP Logic Port), RSCGRP(Resource Group)

Actual Value Range:NULL, IPLGCPORT, RSCGRP

Default Value:NULL

../RNCParaHtml/mbsc/m-para/iplogicport_bwadj.html

../RNCParaHtml/mbsc/m-mml/add-iplogicport.html


../RNCParaHtml/mbsc/m-mml/mod-iplogicport.html


../RNCParaHtml/mbsc/m-para/ippath_carryflag.html

../RNCParaHtml/mbsc/m-mml/add-ippath.html

../RNCParaHtml/mbsc/m-mml/mod-ippath.html

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5-2


CIR BSC6900 ADD IPLOGICPORT(Optional)


Meaning:Bandwidth of the logical port

GUI Value Range:1~1562

Actual Value Range:64~100000, step:64

Default Value:None

DSCP NodeB ADD IPPATH

MOD IPPATH

Meaning:Indicates the Differentiated Services Code Point (DSCP) of the services carried on an IP path


Actual Value Range:0~63

Default Value:None

DSCP BSC6900 SET BTSVLAN(Optional) Meaning:DSCP to be contained in the header of an IP packet. According to this parameter, the router provides differentiated services for packet streams. If this parameter is greater, the service level is higher. This parameter is valid only when the transport type is set to IP



Default Value:0

MAXBW BSC6900 ADD IPLOGICPORT(Optional)


Meaning:Maximum bandwidth for dynamic adjustment at the logical port



Default Value:None

MINBW BSC6900 ADD IPLOGICPORT(Optional)

MOD

Meaning:Minimum bandwidth for dynamic adjustment at the logical port






../NodeBParaHtml/mml-mo-para/para/IPPATH-DSCP.html

../RNCParaHtml/mbsc/m-mml/add-ippath.html

../RNCParaHtml/mbsc/m-mml/mod-ippath.html

../RNCParaHtml/mbsc/m-para/btsvlan_dscp.html

../RNCParaHtml/mbsc/m-mml/set-btsvlan.html

../RNCParaHtml/mbsc/m-para/iplogicport_maxbw.html





../RNCParaHtml/mbsc/m-para/iplogicport_minbw.html




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IPLOGICPORT(Optional) GUI Value Range:1~1562


Default Value:None

SERVICETYPE BSC6900 SET BTSVLAN(Mandatory)

IMP BTSVLAN(Mandatory)

Meaning:Service type of the BTS. The QoS processing depends on the DSCP, VLAN ID, and VLAN priority that vary according to the service type

GUI Value Range:OML(OML), RSL(RSL), EML(EML), ESL(ESL), CSVOICE(CS Voice), CSDATA(CS Data), PSHIGHPRI(PS High PRI), PSLOWPRI(PS Low PRI), OTHERDATA(Other Data)

Actual Value Range:OML, RSL, EML, ESL, CSVOICE, CSDATA, PSHIGHPRI, PSLOWPRI, OTHERDATA

Default Value:None

SIGPRI NodeB SET DIFPRI Meaning:Indicates the priority of signaling data. This parameter value is the same as the DSCP priority of the common channel.A larger value indicates a higher priority



Default Value:48

TRMLOADTHINDEX BSC6900 ADD TRMLOADTH(Mandatory)

RMV TRMLOADTH(Mandatory)

Meaning:TRM load threshold index. It is the unique ID of the load threshold


Actual Value

../RNCParaHtml/mbsc/m-para/btsvlan_servicetype.html

../RNCParaHtml/mbsc/m-mml/set-btsvlan.html

../RNCParaHtml/mbsc/m-mml/imp-btsvlan.html

../NodeBParaHtml/mml-mo-para/para/DIFPRI-SigPri.html

../NodeBMMLHtml/mml-mo-para/mml/set_difpri.html

../RNCParaHtml/mbsc/m-para/trmloadth_trmloadthindex.html

../RNCParaHtml/mbsc/m-mml/add-trmloadth.html

../RNCParaHtml/mbsc/m-mml/add-trmloadth.html

../RNCParaHtml/mbsc/m-mml/rmv-trmloadth.html

../RNCParaHtml/mbsc/m-mml/rmv-trmloadth.html

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5-4


Range:10~199

Default Value:None

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Co-Transmission 6 Counters



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6 Counters

There are no specific counters associated with this feature.

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Co-Transmission 7 Glossary



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7 Glossary

For the acronyms, abbreviations, terms, and definitions, see the Glossary.

Glossary.htm

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Co-Transmission 8 Reference Documents



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8 Reference Documents

[1] Transmission Resource Management Feature Parameter Description
