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Transmission Resource Management

Parameter Description

Copyright Huawei Technologies Co., Ltd. 2009. 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 Huawei Technologies Co., Ltd.

Trademarks and Permissions

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

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

holders.

Notice

The information in this document is subject to change without notice. Every effort has been made in

the preparation of this document to ensure accuracy of the contents, but all statements, information,

and recommendations in this document do not constitute the warranty of any kind, express or implied.

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1 Contents

1 Change History ......................................................................................................................... 1-4

2 Introduction ............................................................................................................................... 2-5

3 TRM Algorithm Overview....................................................................................................... 3-6

3.1 Contents of TRM Algorithms ......................................................................................................... 3-6

3.2 Requirements of TRM Algorithms ................................................................................................. 3-6

3.2.1 Networking Requirement ...................................................................................................... 3-6

3.2.2 QoS Requirement ................................................................................................................. 3-8

3.2.3 Capacity Requirement .......................................................................................................... 3-8

3.2.4 Differentiated Service Requirement ..................................................................................... 3-8

4 Transmission Resources....................................................................................................... 4-9

4.1 Transmission Resource Introduction............................................................................................. 4-9

4.2 Physical Transmission Resources............................................................................................... 4-11

4.2.1 Physical Layer Resources of the RNC for ATM Transport...................... .................... ........ 4-11

4.2.2 Physical and Data Link Layer Resources of the RNC for IP Transport.................... ........... 4-11

4.3 LP Resources .............................................................................................................................. 4-12

4.3.1 LP Introduction ................................................................................................................... 4-12

4.3.2 ATM LP at the RNC ............................................................................................................ 4-14

4.3.3 IP LP at the RNC ................................................................................................................ 4-15

4.3.4 Resource Group at the RNC .............................................................................................. 4-16

4.3.5 ATM LP at the NodeB ......................................................................................................... 4-16

4.3.6 IP LP at the NodeB............................................................................................................. 4-16

4.4 Path Resources ........................................................................................................................... 4-16

4.4.1 AAL2 Path........................................................................................................................... 4-16

4.4.2 IP Path ................................................................................................................................ 4-17

4.5 Priorities ...................................................................................................................................... 4-18

5 TRM Mapping.......................................................................................................................... 5-19

5.1 Traffic Bearer ............................................................................................................................... 5-20

5.2 Transport Bearer ......................................................................................................................... 5-21

5.2.1 Type of Path ....................................................................................................................... 5-21

5.2.2 DiffServ and DSCP............................................................................................................. 5-21

5.3 Mapping from Traffic Bearers to Transport Bearers.................................................................... 5-22

5.3.1 RNC-Oriented Default Mapping ......................................................................................... 5-22

5.3.2 Adjacent-Node-Oriented Mapping...................................................................................... 5-23

6 Load Control ............................................................................................................................ 6-23

6.1 Definition of Load ........................................................................................................................ 6-23

6.2 Bandwidth Reserved for Services............................................................................................... 6-24

6.3 Admission Control ....................................................................................................................... 6-27

6.3.1 Admission Control Algorithm .............................................................................................. 6-27

6.3.2 Load Balancing ................................................................................................................... 6-28

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6.3.3 Admission Procedure ......................................................................................................... 6-30

6.4 Intelligent Access Control ............................................................................................................ 6-33

6.5 Load Reshuffling and Overload Control...................................................................................... 6-33

6.5.1 Iub Congestion Detection ................................................................................................... 6-33

6.5.2 Iub Overload Detection....................................................................................................... 6-34

6.5.3 Congestion and Overload Handling ................................................................................... 6-34

7 User Plane Processing......................................................................................................... 7-35

7.1 Overview of User Plane Processing ........................................................................................... 7-35

7.2 Hub Scheduling and Shaping ..................................................................................................... 7-35

7.2.1 RNC Scheduling and Shaping............................................................................................ 7-35

7.2.2 NodeB Scheduling and Shaping ........................................................................................ 7-35

7.3 Congestion Control of Iub User Plane ........................................................................................ 7-36

7.4 Downlink Iub Congestion Control Algorithm ............................................................................... 7-37

7.4.1 Overview of the Downlink Iub Congestion Control Algorithm..................... ..................... ... 7-37

7.4.2 RNC RLC Retransmission Rate-Based Downlink Congestion Control Algorithm.............. 7-38

7.4.3 RNC Backpressure-Based Downlink Congestion Control Algorithm................................. 7-41

7.4.4 RNC R99 Single Service Downlink Congestion Control Algorithm.................................... 7-42

7.4.5 NodeB HSDPA Adaptive Flow Control Algorithm............................................................... 7-43

7.5 Uplink Iub Congestion Control Algorithm.................................................................................... 7-45

7.5.1 Overview of the Uplink Iub Congestion Control Algorithm................................................. 7-45

7.5.2 NodeB Backpressure-Based Uplink Congestion Control Algorithm (R99 and HSUPA).... 7-46

7.5.3 NodeB Uplink Bandwidth Adaptive Adjustment Algorithm................... .................... ........... 7-47

7.5.4 RNC R99 Single Service Uplink Congestion Control Algorithm..................... .................... 7-48

7.5.5 NodeB Cross-Iur Single HSUPA Service Uplink Congestion Control Algorithm................ 7-49

7.6 Iub Efficiency Improvement ......................................................................................................... 7-50

7.6.1 IP RAN FP-MUX ................................................................................................................. 7-50

7.6.2 IP RAN Header Compression ............................................................................................ 7-50

7.6.3 FP Silent Mode ................................................................................................................... 7-51

7.7 IP PM ........................................................................................................................................... 7-52

8 TRM Parameters ..................................................................................................................... 8-52

8.1 Description .................................................................................................................................. 8-52

8.2 Values and Ranges ..................................................................................................................... 8-58

9 TRM Reference Documents................................................................................................. 9-66

10 Appendix .............................................................................................................................. 10-67

10.1 Default TRMMAP Table for the ATM-Based Iub and Iur Interfaces......................................... 10-67

10.2 Default TRMMAP Table for the IP-Based Iub and Iur Interfaces............................................ 10-68

10.3 Default TRMMAP Table for the ATM&IP-Based Iub Interface.................... .................... ......... 10-70

10.4 Default TRMMAP Table for the Hybrid-IP-Based Iub Interface...................... .................... ..... 10-71

10.5 Default TRMMAP Table for the ATM-Based Iu-CS Interface.................................................. 10-73

10.6 Default TRMMAP Table for the IP-Based Iu-CS Interface...................................................... 10-73

10.7 Default TRMMAP Table for the Iu-PS Interface...................................................................... 10-73

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Change History

The change history provides information on the changes in different document versions.

Document and Product Versions

Table 1-1 Document and product versions

Document Version RAN Version

01 (2009-03-30) 11.0

Draft (2009-03-10) 11.0

Draft (2009-01-15) 11.0

This document is based on the BSC6810 and 3900 series NodeBs.

The available time of each feature is subject to the RAN product roadmap.

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

Feature change: refers to the change in the transmission resource management.

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

01 (2009-03-30)

This is the document for the first commercial release of RAN11.0.

Compared with draft (2009-03-10) of RAN11.0, this issue incorporates the following changes:

Change Type Change Description Parameter Change

Feature change None. None.Editorial change The description of UBR PLUS is changed to UBR

+.None.

Draft (2009-03-10)

This is the second draft of the document for RAN11.0.

Compared with draft (2009-01-15), draft (2009-03-10) optimizes the description.

Draft (2009-01-15)

This is the initial draft of the document for RAN11.0.

Compared with 02 (2008-07-30) of RAN10.0, draft (2009-01-15) incorporates the followingchanges:

ChangeType

Change Description Parameter Change

Featurechange

None. None.

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ChangeType

Change Description Parameter Change

Editorialchange

General documentation change:

The contents of the Iub Overbooking Descriptionareadded to this document, and the description in thisdocument is revised.

None.

The title of the document is changed fromTransmission Resource Management DescriptiontoTransmission Resource Management ParameterDescription.

None.

Parameter names are replaced with parameter IDs. None.

None. The added parameters areas follows:

MoniterPrd

TimeToTriggerAEventAThred

PendingTimeA

TimeToTriggerB

TimeToMoniter

EventBThred

PendingTimeB

Introduction

Transmission Resource Management (TRM) is aimed at increasing the system capacity in

various networking scenarios without affecting the Quality of Service (QoS). In addition, TRMprovides differentiated services for Best Effort (BE) services to improve the data transmissionefficiency.

TRM involves management of the transmission resources on the Iub, Iur, and Iu interfaces.

Transmission resources are one type of resource that the UTRAN provides. Closely related toTRM algorithms are Radio Resource Management (RRM) algorithms, such as the schedulingalgorithm and load control algorithm for the Uu interface. The TRM algorithm policies should beconsistent with the RRM algorithm policies.

Compared with the transmission on the other interfaces, the transmission on the Iub interface isof higher costs and more complex networking modes and has a greater impact on the systemperformance. Therefore, this document describes only the TRM algorithms for the Iub interface.

Intended Audience

This document is intended for:

System operators who need a general understanding of transmission resource management.

Personnel working on Huawei products or systems.

Impact

Impact on system performance

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None.

Impact on other features

None.

Network Elements Involved

Table 2-1lists the Network Elements (NEs) involved in TRM.

Table 1-2 NEs involved in TRM

UE NodeB RNC MSCServer

MGW SGSN GGSN HLR

NOTE:

: not involved

: involved

UE = User Equipment, RNC = Radio Network Controller, MSC Server = Mobile Service Switching Center

Server, MGW = Media Gateway, SGSN = Serving GPRS Support Node, GGSN = Gateway GPRS SupportNode, HLR = Home Location Register

TRM Algorithm Overview

Contents of TRM Algorithms

TRM algorithms cover the following aspects:

Transmission resources: basic transmission resources, including key objects such as ports andpaths, and attributes such as priorities and bandwidth.

Mapping from traffic bearers to transmission bearers: Transport networks can provide priority-based services. According to the QoS requirements, traffic class, Allocation/Retention Priority

(ARP), Traffic Handling Priority (THP), and radio bearer types of services, the transportnetworks map traffic to the transport bearers with the appropriate characteristics of transporttypes and transmission priorities.

Load control for transmission resources: The TRM algorithms control access of users to thenetwork. With the QoS guaranteed, the network allows access of users to the maximum extent.

Congestion control on the user plane of the transport network layer: For non-real-time (NRT)services, the control helps prevent congestion and packet loss.

Improvement in efficiency on the user plane of the transport network layer: The bandwidthoccupied by services is reduced to improve the transmission efficiency on the user plane.

Requirements of TRM Algorithms

Networking Requirement

The typical networking scenarios for the Iub interface are as follows:

Direct connection: The RNC is directly connected to a NodeB through a physical port, thebandwidth of which is exclusively occupied by this Iub interface. This is the simplest scenario,in which the TRM algorithms are also simple.

Transmission convergence: As shown inFigure 3-1,the Iub traffic of more than one NodeB isconverged, for example, on the transport network or by the hub NodeB. In this scenario, thetransmission convergence information, which can serve as the input to TRM al