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RAN

Rate Control Description

Issue Draft

Date 2008-03-20

Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd


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Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For any

assistance, please contact our local office or company headquarters.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

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Website: http://www.huawei.com

Email: [email protected]

Copyright Huawei Technologies Co., Ltd. 2008. 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 the property 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 the statements, information, and

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

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Contents

About This Document.....................................................................................................................1

1 Rate Control Change History...................................................................................................1-1

2 Rate Control Overview..............................................................................................................2-1

2.1 Rate Control Introduction................................................................................................................................2-2

2.2 Supported Software Releases for Rate Control...............................................................................................2-3

3 Rate Control Technical Description.......................................................................................3-1

3.1 AMRC/AMRC-WB........................................................................................................................................3-2

3.1.1 Initial Access Rate of AMRC/AMRC-WB............................................................................................3-2

3.1.2 AMRC/AMRC-WB Algorithm Based on Uplink Stability...................................................................3-9

3.1.3 AMRC/AMRC-WB Algorithm Based on Downlink Stability............................................................3-24

3.1.4 AMRC/AMRC-WB Algorithm Based on Basic Congestion...............................................................3-34

3.1.5 AMRC/AMRC-WB Algorithm for TFO/TrFO....................................................................................3-35

3.1.6 AMRC/AMRC-WB Parameters...........................................................................................................3-38

3.2 DCCC............................................................................................................................................................3-38

3.2.1 Rate Reallocation Based on Traffic Volume........................................................................................3-39

3.2.2 Rate Reallocation Based on Throughput..............................................................................................3-59

3.2.3 Rate Reallocation Based on Link Quality............................................................................................3-69

3.2.4 BE Rate Downsizing and Recovery Based on Basic Congestion........................................................3-94

3.2.5 UE State Transition Algorithm..........................................................................................................3-102

3.2.6 Always Online....................................................................................................................................3-123

3.2.7 DCCC Parameters..............................................................................................................................3-129

3.3 Link Stability Control Algorithm................................................................................................................3-134

3.3.1 Link Stability Control Algorithm for AMR/AMR-WB Speech Services..........................................3-135

3.3.2 Link Stability Control Algorithm for VP Services.............................................................................3-141

3.3.3 Link Stability Control Algorithm for BE Services.............................................................................3-146

3.3.4 Link Stability Control Parameters......................................................................................................3-154

4 Implementing Rate Control.....................................................................................................4-1

5 Rate Control Reference Documents.......................................................................................5-1

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Figures

Figure 3-1 UL events and thresholds.................................................................................................................3-10

Figure 3-2 Event 6D and thresholds...................................................................................................................3-11

Figure 3-3 Signaling procedure of measurement control...................................................................................3-23

Figure 3-4 Signaling procedure of measurement reporting................................................................................3-23

Figure 3-5 Signaling procedure of UL AMR/AMR-WB speech codec mode adjustment.................................3-24

Figure 3-6 DL Events and Thresholds...............................................................................................................3-25

Figure 3-7 Signaling procedure of dedicated measurement...............................................................................3-33

Figure 3-8 Signaling procedure of dedicated measurement reporting...............................................................3-33

Figure 3-9 Signaling procedure of DL rate adjustment......................................................................................3-33

Figure 3-10 Signaling procedure of UL AMR/AMR-WB rate downsizing based on UL basic congestion......3-34

Figure 3-11 Signaling procedure of DL AMR/AMR-WB rate downsizing based on DL basic congestion......3-35

Figure 3-12 Typical speech codec tandem operation.........................................................................................3-35

Figure 3-13 Event 4a triggered by an increase in the transport channel traffic volume....................................3-41

Figure 3-14 Event 4b triggered by a decrease in the transport channel traffic volume......................................3-41Figure 3-15 Measurement control......................................................................................................................3-41

Figure 3-16 Measurement report........................................................................................................................3-42

Figure 3-17 Rate reallocation when both Uplink Rate decrease adjust level and Uplink Rate increase adjust

level are 2_Rates.................................................................................................................................................3-48

Figure 3-18 Rate reallocation when both Uplink Rate decrease adjust level and Uplink Rate increase adjust

level are 3_Rates.................................................................................................................................................3-48

Figure 3-19 Rate reallocation when Uplink Rate increase adjust level is 2_Rates.........................................3-49

Figure 3-20 Rate reallocation when Uplink Rate increase adjust level is 3_Rates.........................................3-50

Figure 3-21 Rate reallocation when both Downlink Rate decrease adjust level and Downlink Rate increase

adjust level are 2_Rates......................................................................................................................................3-54Figure 3-22 Rate reallocation when both Downlink Rate decrease adjust level and Downlink Rate increase

adjust level are 3_Rates......................................................................................................................................3-54

Figure 3-23 Rate reallocation when Downlink Rate increase adjust level is 3_Rates....................................3-55

Figure 3-24 Rate reallocation when Downlink Rate increase adjust level is 2_Rates....................................3-55

Figure 3-25 Signaling procedure of UL rate downsizing based on traffic volume............................................3-58

Figure 3-26 Signaling procedure of UL rate upsizing based on traffic volume.................................................3-58

Figure 3-27 Signaling procedure of DL rate downsizing based on traffic volume............................................3-59

Figure 3-28 Signaling procedure of DL rate upsizing based on traffic volume.................................................3-59

Figure 3-29 Mechanism of throughput measurement and reporting of events 4a and 4b..................................3-60

Figure 3-30 Average throughput between TRi1 and TRi..................................................................................3-68

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Figure 3-31 Signaling procedure of rate upsizing based on throughput............................................................3-69

Figure 3-32 Signaling procedure of rate downsizing based on throughput........................................................3-69

Figure 3-33 Event 5A mechanism......................................................................................................................3-75

Figure 3-34 Event E reporting mechanism.........................................................................................................3-79

Figure 3-35 RLC retransmission rate.................................................................................................................3-83

Figure 3-36 Event F reporting mechanism.........................................................................................................3-86

Figure 3-37 Rate downsizing based on uplink quality in the case of 3-rate adjustment....................................3-90

Figure 3-38 Rate upsizing process based on uplink quality ..............................................................................3-91

Figure 3-39 Rate downsizing based on downlink quality in the case of 3-rate adjustment...............................3-92

Figure 3-40 Rate upsizing process based on downlink quality..........................................................................3-93

Figure 3-41 Signaling procedure of rate downsizing based on downlink quality..............................................3-94

Figure 3-42 UL BE rate downsizing and upsizing based on UL basic congestion (2)......................................3-96

Figure 3-43 DL BE rate downsizing and upsizing based on DL basic congestion (2)......................................3-97

Figure 3-44 Signaling procedure of UL rate downsizing based on UL basic congestion..................................3-98

Figure 3-45 Signaling procedure of DL rate downsizing based on DL basic congestion..................................3-99

Figure 3-46 Rate upsizing failure penalty in case of 2_Rates adjustment.......................................................3-100

Figure 3-47 UE state transition and status of the RRC connection..................................................................3-102

Figure 3-48 UE state transition from CELL_DCH to CELL_FACH..............................................................3-104

Figure 3-49 PDCP release process...................................................................................................................3-124

Figure 3-50 The related procedure of uplink link stability control algorithm..................................................3-149

Figure 3-51 The related procedure of downlink link stability control algorithm.............................................3-152

Figures

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Tables

Table 1-1 Document and product versions...........................................................................................................1-1

Table 2-1 NEs involved in rate control................................................................................................................2-3

Table 2-2 RAN products and related versions......................................................................................................2-3




Table 3-1 Key terms involved in the AMRC/AMRC-WB feature.......................................................................3-2

Table 3-2 UL AMRC/AMRC-WB algorithm....................................................................................................3-22

Table 3-3 Change of DL permitted highest AMR/AMR-WB speech codec mode............................................3-32

Table 3-4 Configuration model of AMRC/AMRC-WB.....................................................................................3-38

Table 3-5 Parameters used for UE state transition from CELL_DCH to CELL_FACH.................................3-104

Table 3-6 Parameters used for UE state transition from CELL_FACH to CELL_PCH..................................3-116

Table 3-7 Parameters used for UE state transition from CELL_FACH to CELL_DCH.................................3-119

Table 3-8 Parameters related to DCCC............................................................................................................3-129Table 3-9 Parameters related to Link Stability Control....................................................................................3-154

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About This Document

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1 Rate Control Change HistoryRate Control Change History provides information on the changes between different document

versions.

Document and Product Versions

Table 1-1 Document and product versions

DocumentVersion

RAN Version RNC Version NodeB Version

Draft

(2008-03-20)

10.0 V200R010C01B050 V100R010C01B045

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

l Feature change: refers to the change in the Rate Control feature of a specific product version.

l Editorial change: refers to the change in the information that has already been included, or

the addition of the information that was not provided in the previous version.

Draft (2008-03-20)

This is a draft of the document for the first commercial release of RAN10.0.

Compared with issue 03 (2008-01-20) of RAN 6.1, this issue incorporates the changes described

in the following table.

ChangeType

Change Description Parameter Change

Feature

change

The AMRC/AMRC-WB algorithms are

updated and the link stability control algorithm

of AMR/AMR-WB speech services is added,

see3.3.1 Link Stability Control Algorithm for

AMR/AMR-WB Speech Services.

See Parameter Change of

Rate Control.xls.

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ChangeType

Change Description Parameter Change

Throughput-based rate reallocation on the DCH

is added and only rate downsizing is applicable.

For detailed information, see 3.2.2 Rate

Reallocation Based on Throughput.

The following parameters

are added:

l DCH Throu Meas

Period

l Period Amount to

trigger 4B on DCH

l Period Amount after

trigger 4B on DCH

l percent of ratio for

8Kbps to 384Kbps

Rate reallocation based on uplink quality is

added. For detailed information, see 3.2.3 RateReallocation Based on Link Quality.

see Parameter Change of

Rate Control.xls

The link stability control algorithm has been

added in Rate Control. For detailed information,

see 3.3 Link Stability Control Algorithm.

For detailed information

about the added parameters,

see 3.3.4 Link Stability

Control Parameters.

Many parameters and related commands of Rate

Control are changed, see Parameter Change of

Rate Control.xls.

-

Editorial

change

The DCCC, AMRC, and AMRC-WB features

have been merged into one feature Rate Control.

None

"Relation Between Congestion and Rate

Upsizing" is updated and renamed as "Rate

Upsizing Failure and Penalty". For detailed

information, see 3.2.4.4 Rate Upsizing Failure

and Penalty.

None

Implementation information has been moved to

a separate document. For information on how to

implement rate control, see Configuring Rate

Control in RAN Feature Configuration

Guide.

None

1 Rate Control Change History

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2 Rate Control OverviewAbout This Chapter

Rate control triggers rate upsizing, rate downsizing, and handover for different services

according to the consumption of resources.

2.1 Rate Control Introduction

Rate control triggers rate upsizing, rate downsizing, and handover for different services

according to the consumption of resources.

2.2 Supported Software Releases for Rate Control

Supported Software Release for Rate Control provides information on the software environment

where rate control is supported.

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2.1 Rate Control Introduction

Rate control triggers rate upsizing, rate downsizing, and handover for different servicesaccording to the consumption of resources.

Rate control in the Wideband Code Division Multiple Access (WCDMA) system has two types:

rate control over Adaptive Multi Rate (AMR) services and rate control over Best Effort (BE)

services. Rate control herein is described in terms of the following algorithms:

l Adaptive Multi-Rate Control (AMRC) / AMRC-WB algorithms: They are implemented

by the RNC. They dynamically adjust the transport format based on the cell load, link

power, and Iub resource utilization, so as to achieve the balance between the system load,

link stability, Iub resources, and link QoS. The UL AMRC/AMRC-WB algorithm and the

DL AMRC/AMRC-WB algorithm work independently.

l Dynamic Channel Configuration Control (DCCC) algorithm: It is implemented by the

RNC. It controls the rate of BE services according to the traffic volume, throughput, radio

link quality, or congestion state. The UL DCCC algorithm and the DL DCCC algorithm

work independently.

l Link stability control algorithm: It is implemented by the RNC. It triggers rate downsizing,

inter-frequency handover, and inter-RAT handover to guarantee the stability of links and

QoS of services. The rate downsizing of this algorithm is the power-based rate downsizing

in AMRC/AMRC-WB and DCCC.

Impact

AMRC/AMRC-WB Impact on System Performance

l The AMRC/AMRC-WB algorithm can be used to steer the UL permitted highest AMR/

AMR-WB speech codec mode down according to the UE transmit power. In this way, the

UL coverage is expanded.

l The AMRC/AMRC-WB algorithm can be used to steer the permitted highest AMR/AMR-

WB speech codec mode down according to DPDCH transmit power or UE transmit power.

In this way, the system capacity is increased in terms of the maximum number of UEs that

the system can process.

l The AMRC/AMRC-WB algorithm can be used to choose a proper AMR/AMR-WB speech

codec mode according to the quality of the transmission environment. In this way, the

speech quality is ensured.

DCCC Impact on System Performance

Every time rate adjustment occurs, there is interactive signaling on the Uu and Iub interfaces.

The impact on the system performance has relations with the user profile mode and the user

traffic mode. In general, there is little impact of DCCC on the system performance.

Link Stability Control Algorithm Impact on System Performance

Link stability control algorithm has no impact on system performance.

Impact on Other Features

Rate control has no impact on other features.

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Network Elements Involved

Table 2-1 describes the Network Elements (NEs) involved in rate control.

Table 2-1 NEs involved in rate controlUE NodeB RNC MSC Server MGW SGSN GGSN HLR

NOTE

l : not involved

l : involved

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

= Media Gateway, SGSN = Serving GPRS Support Node, GGSN = Gateway GPRS Support Node, HLR

= Home Location Register

2.2 Supported Software Releases for Rate Control

Supported Software Release for Rate Control provides information on the software environment

where rate control is supported.

Table 2-2 describes the versions of HUAWEI UMTS RAN products that support AMRC.

Table 2-2 RAN products and related versions

Product VersionRNC BSC6800 V100R005 and later releases

BSC6810 V200R009 and later releases

Table 2-3 describes the versions of HUAWEI UMTS RAN products that support AMRC-WB.


Product Version

RNC BSC6800 V100R008 and later releases


Table 2-4 describes the versions of HUAWEI UMTS RAN products that support DCCC.

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Product Version



Table 2-5 describes the versions of HUAWEI UMTS RAN products that support Link Stability

Control Algorithm.


Product Version



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3 Rate Control Technical DescriptionAbout This Chapter

Rate Control Technical Description covers the technical aspects of AMRC/AMRC-WB, DCCC,

and link stability control.

3.1 AMRC/AMRC-WB

AMRC/AMRC-WB describes two important algorithms: AMRC and AMRC-WB.

3.2 DCCC

DCCC describes the important algorithms related to DCCC: rate reallocation algorithm, UE

state transition algorithm, and always online algorithm.

3.3 Link Stability Control Algorithm

Link stability control algorithm describes three important algorithms: Link stability control of

AMR/AMR-WB speech services, Link stability control of VP services, and Link stability control

of BE services.

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3.1 AMRC/AMRC-WB

AMRC/AMRC-WB describes two important algorithms: AMRC and AMRC-WB.

Table 3-1 Key terms involved in the AMRC/AMRC-WB feature

Term Definition

Guaranteed bit rate (GBR) The GBR is the minimum bit rate for the RNC to adjust. It is

contained in the RAB assignment message that the CN sends

to the RNC.

The controllable AMR speech

codec mode set

The set consists of the AMR speech codec modes that are

contained in the supported AMR speech codec mode set and

are equal to or larger than the GBR. The modes in this set can

be selected by the AMRC/AMRC-WB algorithm.

For example:

The supported AMR speech codec mode set is {NO DATA, SID, 4.75 kbit/s, 7.95 kbit/s, 12.2

kbit/s}.

Then, the controllable AMR speech codec mode set is {4.75 kbit/s, 7.95 kbit/s, 12.2 kbit/s},

if the GBR is 4.75 kbit/s.

3.1.1 Initial Access Rate of AMRC/AMRC-WB

Initial Access Rate of AMRC/AMRC-WB provides the definition of initial access rate, values

of initial access rate and controllable mode set in different situations.

3.1.2 AMRC/AMRC-WB Algorithm Based on Uplink Stability

The UL AMRC algorithm steers the UL permitted highest AMR speech codec mode up or down

according to the UE transmit (TX) power.

3.1.3 AMRC/AMRC-WB Algorithm Based on Downlink Stability

The DL AMRC algorithm steers the DL permitted highest AMR speech codec mode up or down

according to the DPDCH transmit (TX) power.

3.1.4 AMRC/AMRC-WB Algorithm Based on Basic Congestion

AMRC/AMRC-WB Algorithm Based on Basic Congestion is one of the actions implemented

by Load Reshuffling (LDR).

3.1.5 AMRC/AMRC-WB Algorithm for TFO/TrFO

This describes the AMRC/AMRC-WB algorithm for TFO/TrFO from the following aspects:

background information of TFO/TrFO, support for TFO/TrFO, and AMRC/AMRC-WB

algorithm for TFO/TrFO.

3.1.6 AMRC/AMRC-WB Parameters

This describes the effective level and configuration of the parameters related to AMRC/AMRC-

WB.

3.1.1 Initial Access Rate of AMRC/AMRC-WB

Initial Access Rate of AMRC/AMRC-WB provides the definition of initial access rate, valuesof initial access rate and controllable mode set in different situations.

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3.1.1.1 Initial Access Rate of AMRC

Initial Access Rate of AMRC provides the definition of initial access rate, values of initial access

rate and controllable mode set in different situations.

3.1.1.2 Initial Access Rate of AMRC-WB

This provides the definition of initial access rate, values of initial access rate and controllablemode set in different situations.

Initial Access Rate of AMRC

Initial Access Rate of AMRC provides the definition of initial access rate, values of initial access

rate and controllable mode set in different situations.

Definition of Initial Access Rate

l For uplink, the initial access rate is not only the maximum permitted bit rate at the start of

the communication phase, but also the maximum bit rate that the UL AMRC algorithm can

select, that is, the maximum bit rate in the uplink controllable AMR speech codec modeset (controllable mode set for short).

l For downlink, the initial access rate is the maximum permitted bit rate at the start of the

communication phase.

Value of Initial Access Rate

AMRC Algorithm Enabled

When the AMRC algorithm is enabled,

l If the cell load is in basic congestion, the initial access rate is the GBR in the RAB

parameters.l If the cell load is normal, the initial access rate is the maximum rate that is in the RAB

assignment message sent from the CN and meets both the following conditions:

Higher than or equal to the GBR in the RAB assignment message sent from the CN

Lower than or equal to the UE-priority-oriented maximum rate that is set on the RNC

LMT

For detailed information about how to enable the AMRC algorithm, see theRate Control

Configuration Guide.

NOTE

The UE-priority-oriented maximum rate refers to theMax mode of narrowband AMRC for golden

users, Max mode of narrowband AMRC for silver users , and Max mode of narrowband AMRC for

copper users parameters. For detailed information about the definitions and description of the user priority,

see Priorities Involved in Load Control.

If the UE-priority-oriented maximum rate is lower than the GBR in the RAB assignment message, then

the initial access rate is the GBR.

This note applies to all the initial access rates mentioned thereafter.

AMRC Algorithm Disabled

When the AMRC algorithm is disabled, the initial access rate is the maximum rate that is in the

RAB assignment message sent from the CN and meets both the following conditions:

l Higher than or equal to the GBR in the RAB assignment message sent from the CN

l Lower than or equal to the UE-priority-oriented maximum rate that is set on the RNC LMT

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In this case, all the AMR rates in the controllable mode set, a subset of the set in the RAB

assignment message, are no lower than GBR and no higher than the UE-priority-oriented

maximum rate configured on the RNC LMT.

Controllable Mode Set

Only when AMRC algorithm is enabled, the controllable mode set is valid.

l For links in the uplink,

If the initial access rate is the GBR in the RAB assignment message, the uplink

controllable mode set contains only one rate, that is, {GBR in the RAB assignment

message}.

If the initial access rate is higher than the GBR in the RAB assignment message, the

uplink controllable mode set is {GBR in the RAB assignment message, initial access

rate}.

l For links in the downlink,

In the case of Iu UP version 2, the downlink controllable mode set contains all the rates

that are included in the RAB assignment message and higher than or equal to the GBR.

In the case of Iu UP version 1 and code-resource-saving algorithm disabled, assume

that the maximum rate that is in the RAB assignment message sent from the CN and

meets both of the following conditions is expressed as Rmax:



LMT

Then, if Rmax is higher than the GBR, the downlink controllable mode set is {GBR in

the RAB assignment message, Rmax}. Otherwise, the downlink controllable mode set

contains only one rate, that is {GBR in the RAB assignment message}.

In the case of Iu UP version 1 and code-resource-saving algorithm enabled,

If the initial access rate is the GBR in the RAB assignment message, the downlink


message}.


downlink controllable mode set is {GBR in the RAB assignment message, initial

access rate}.

NOTE

The DL code-resource-saving algorithm is available for the RNC. This algorithm allows a single speech

service which has a DL maximum rate of 7.95 kbit/s or lower to use 256 as the Spreading Factor (SF) for

the downlink. When the DL code-resource-saving algorithm is disabled, SF128 is used for the downlink.

Parameter

The following tables describe the parameters of the UE-priority-oriented maximum rate.

Parameter Name Max mode of narrowband AMRC for golden users

Parameter ID GOLDMAXMODE


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GUI Range NBAMR_BITRATE_4.75K, NBAMR_BITRATE_5.15K,NBAMR_BITRATE_5.90K, NBAMR_BITRATE_6.70K,

NBAMR_BITRATE_7.40K, NBAMR_BITRATE_7.95K,

NBAMR_BITRATE_10.20K, NBAMR_BITRATE_12.20K

Physical Range &Unit

4.75 kbit/s, 5.15 kbit/s, 5.90 kbit/s, 6.70 kbit/s, 7.40 kbit/s, 7.95 kbit/

s, 10.20 kbit/s, 12.20 kbit/s

Default Value NBAMR_BITRATE_12.20K

Optional/Mandatory

Optional

MML Command SET AMRC

ADD CELLAMRC

Description This parameter defines the maximum mode of narrowband AMRC

for golden users.

Parameter Name Max mode of narrowband AMRC for silver users

Parameter ID SILVERMAXMODE






s, 10.20 kbit/s, 12.20 kbit/s


Optional/Mandatory

Optional


ADD CELLAMRC

Description This parameter defines the maximum mode of narrowband AMRC

for silver users.

Parameter Name Max mode of narrowband AMRC for copper users

Parameter ID COPPERMAXMODE




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s, 10.20 kbit/s, 12.20 kbit/s


Optional/Mandatory

Optional


ADD CELLAMRC

Description This parameter defines the maximum mode of narrowband AMRCfor copper users.

Initial Access Rate of AMRC-WB

This provides the definition of initial access rate, values of initial access rate and controllable

mode set in different situations.

Definition of Initial Access Rate

l For uplink, the initial access rate is not only the maximum permitted bit rate at the start of

the communication phase, but also the maximum bit rate that the UL AMRC-WB algorithm

can select, that is, the maximum bit rate in the uplink controllable AMR-WB speech codec

mode set (controllable mode set for short).

l For downlink, the initial access rate is the maximum permitted bit rate at the start of the

communication phase.

Value of Initial Access Rate

AMRC-WB Algorithm Enabled

When the AMRC-WB algorithm is enabled,

l If the cell load is in basic congestion, the initial access rate is the GBR in the RAB

parameters.

l If the cell load is normal, the initial access rate is the maximum rate that is in the RAB

assignment message sent from the CN and meets both the following conditions:


Lower than or equal to the UE-priority-oriented maximum rate that is set on the RNCLMT

For detailed information about how to enable the AMRC-WB algorithm, see theRate Control

Configuration Guide.

NOTE

The UE-priority-oriented maximum rate refers to the Max mode of wideband AMRC for golden users ,

Max mode of wideband AMRC for silver users, and Max mode of wideband AMRC for copper

users parameters. For detailed information about the definitions and description of the user priority, see

Priorities Involved in Load Control.

If the UE-priority-oriented maximum rate is lower than the GBR in the RAB assignment message, then

the initial access rate is the GBR.

This note applies to all the initial access rates mentioned thereafter.


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AMRC-WB Algorithm Disabled

When the AMRC-WB algorithm is disabled, the initial access rate is the maximum rate that is

in the RAB assignment message sent from the CN and meets both the following conditions:

l

Higher than or equal to the GBR in the RAB assignment message sent from the CNl Lower than or equal to the UE-priority-oriented maximum rate that is set on the RNC LMT

Controllable Mode Set

Only when AMRC-WB algorithm is enabled, the controllable mode set is valid.

l For links in the uplink,

If the initial access rate is the GBR in the RAB assignment message, the uplink


message}.


uplink controllable mode set is {GBR in the RAB assignment message, initial access

rate}.

l For links in the downlink,

In the case of Iu UP version 2, the downlink controllable mode set contains all the rates

that are included in the RAB assignment message and higher than or equal to the GBR.

In the case of Iu UP version 1, assume that the maximum rate that is in the RAB

assignment message sent from the CN and meets both of the following conditions is

expressed as Rmax:



LMT

Then, if Rmax is higher than the GBR, the downlink controllable mode set is {GBR in

the RAB assignment message, Rmax}. Otherwise, the downlink controllable mode set

contains only one rate, that is {GBR in the RAB assignment message}.

Parameter

The following tables describe the parameters of the UE-priority-oriented maximum rate.

Parameter Name Max mode of wideband AMRC for golden users

Parameter ID GOLDMAXMODE

GUI Range WBAMR_BITRATE_6.60K, WBAMR_BITRATE_8.85K,WBAMR_BITRATE_12.65K, WBAMR_BITRATE_14.25K,

WBAMR_BITRATE_15.85K, WBAMR_BITRATE_18.25K,


WBAMR_BITRATE_23.85K


6.60 kbit/s, 8.85 kbit/s, 12.65 kbit/s, 14.25 kbit/s, 15.85 kbit/s, 18.25

kbit/s, 19.85 kbit/s, 23.05 kbit/s, 23.85 kbit/s

Default Value WBAMR_BITRATE_23.85K

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Optional/Mandatory

Optional

MML Command SET AMRCWB

ADD CELLAMRCWB

Description This parameter defines the maximum mode of wideband AMRC forgolden users.

Parameter Name Max mode of wideband AMRC for silver users

Parameter ID SILVERMAXMODE

GUI Range WBAMR_BITRATE_6.60K, WBAMR_BITRATE_8.85K,

WBAMR_BITRATE_12.65K, WBAMR_BITRATE_14.25K,WBAMR_BITRATE_15.85K, WBAMR_BITRATE_18.25K,







Optional/Mandatory

Optional

MML Command SET AMRCWBADD CELLAMRCWB

Description This parameter defines the maximum mode of wideband AMRC forsilver users.

Parameter Name Max mode of wideband AMRC for copper users

Parameter ID COPPERMAXMODE

GUI Range WBAMR_BITRATE_6.60K, WBAMR_BITRATE_8.85K,WBAMR_BITRATE_12.65K, WBAMR_BITRATE_14.25K,








Optional/Mandatory

Optional


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MML Command SET AMRCWB

ADD CELLAMRCWB

Description This parameter defines the maximum mode of wideband AMRC for

copper users.

3.1.2 AMRC/AMRC-WB Algorithm Based on Uplink Stability

The UL AMRC algorithm steers the UL permitted highest AMR speech codec mode up or down

according to the UE transmit (TX) power.

3.1.2.1 UL Measurement and Event Reporting

Measurement results serve as the basis of AMRC/AMRC-WB. By comparing the measurement

results with associated thresholds, the UE reports events. Then, the RNC takes associatedAMRC/AMRC-WB actions.

3.1.2.2 UL AMRC/AMRC-WB Action

Based on the event reports from the UE, the UL AMRC/AMRC-WB algorithm takes associated

AMRC/AMRC-WB actions.

3.1.2.3 UL AMRC/AMRC-WB Signaling Procedure

This describes UL AMRC/AMRC-WB signaling procedures.

UL Measurement and Event Reporting


results with associated thresholds, the UE reports events. Then, the RNC takes associatedAMRC/AMRC-WB actions.

UL Measurement

In the uplink, the measurement quantity is the transmit power of the UE.

UL Events and Thresholds

UL AMRC/AMRC-WB events consist of 6A1, 6A2, 6B1, 6B2 and 6D.

Events 6A1, 6A2, 6B1, and 6B2

Events 6A1, 6B1, 6A2, and 6B2 have their respective thresholds. The thresholds 6A1, 6B1, 6A2,

and 6B2 inFigure 3-1 are specific for measurement events 6A1, 6B1, 6A2, and 6B2 respectively.

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Figure 3-1 UL events and thresholds

The Delta_6a1, Delta_6b1, Delta_6a2, and Delta_6b2 in Figure 3-1 refer to the following

relative values respectively:

l The relative value between the TX power threshold 6A1 and the Max UL TX power of

conversational service

l The relative value between the TX power threshold 6B1 and the Max UL TX power of


l

The relative value between the TX power threshold 6A2 and the Max UL TX power ofconversational service

l The relative value between the TX power threshold 6B2 and the Max UL TX power of


Therefore, Delta_6a1, Delta_6b1, Delta_6a2, and Delta_6b2 are relative measurement

thresholds.

A set of relative measurement thresholds for all AMR/AMR-WB services are configured. The

set includes the following parameters:

l UL 6A1 event relative threshold

l

UL 6B1 event relative thresholdl UL 6A2 event relative threshold

l UL 6B2 event relative threshold

The measurement thresholds, that is, the absolute measurement thresholds, are calculated on the

basis of the following formula:

l Measurement threshold 6A1 = Max UL TX power of conversational service UL 6A1

event relative threshold

l Measurement threshold 6B1 = Max UL TX power of conversational service UL 6B1


l

Measurement threshold 6A2 = Max UL TX power of conversational service UL 6A2event relative threshold


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l Measurement threshold 6B2 = Max UL TX power of conversational service UL 6B2


Event 6D

The threshold of event 6D is the maximum UE Tx power, which can not be set on the RNCLMT.

Figure 3-2 Event 6D and thresholds

Parameter Name Max UL TX power of conversational service

Parameter ID MaxUlTxPowerforConv

GUI Range 50 to 33


dBm

Default Value 24

Optional/Mandatory

Optional

MML Command ADD CELLCAC

MOD CELLCAC

Description This parameter defines the maximum UL transmit power forconversational service in a specific cell. It is based on the UL

coverage requirement of the conversational service designed by the

network planning.

Parameter Name UL 6A1 event relative threshold

Parameter ID UlThd6A1

GUI Range 0 to 82

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0 to 82

Step: 1 (dB)

Default Value 2

Optional/Mandatory

Optional

MML Command ADD TYPRABQUALITYMEAS

MOD TYPRABQUALITYMEAS

Description This parameter defines the measurement reporting threshold atwhich the event 6A1 is triggered.

For UL measurement, the event-triggered reporting mode applies.

The event 6A1 refers to the event triggered when the measured

value is higher than the upper absolute threshold 6A1. When the

event 6A1 is triggered, AMRC/AMRC-WB will decrease theAMR/AMR-WB speech rate by one level.

What this parameter defines is a relative threshold. The absolute

threshold = Max UL TX power of conversational service UL

6A1 event relative threshold.

Therefore, the greater the value of this parameter, the lower the

absolute threshold. A greater value of this parameter results in a

greater possibility of triggering the request for AMR/AMR-WB

speech rate decrease. Accordingly, the AMR/AMR-WB speech rate

is more likely to be decreased.

Configuration Rule and Restriction

UL 6A1 event relative thresholdUL 6B1 event relative threshold

Parameter Name UL 6B1 event relative threshold

Parameter ID UlThd6B1

GUI Range 0 to 82


0 to 82

Step: 1 (dB)

Default Value 2

Optional/Mandatory

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Description This parameter defines the measurement reporting threshold atwhich the event 6B1 is triggered.


The event 6B1 refers to the event triggered when the measured value

is lower than the upper absolute threshold 6B1.

When the event 6B1 is triggered, AMRC/AMRC-WB will stop

adjusting the UL AMR/AMR-WB speech rate.



6B1 event relative threshold.



smaller possibility of reaching the value at which the AMR/AMR-

WB speech rate decrease can stop. Accordingly, the AMR/AMR-

WB speech rate is more likely to be decreased.


l UL 6B1 event relative thresholdUL 6A1 event relative threshold

l UL 6B1 event relative threshold < UL 6A2 event relative threshold

Parameter Name UL 6A2 event relative threshold

Parameter ID UlThd6A2

GUI Range 1 to 83


1 to 83

Step: 1 (dB)

Default Value 10

Optional/Mandatory

Optional



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Description This parameter defines the measurement reporting threshold atwhich the event 6A2 is triggered.


The event 6A2 refers to the event triggered when the measured value

is higher than the lower absolute threshold 6A2. When the event

6A2 is triggered, AMRC/AMRC-WB will stop adjusting the UL

AMR/AMR-WB speech rate.



6A2 event relative threshold.



greater possibility of reaching the value at which the AMR/AMR-

WB speech rate increase can stop. Accordingly, the AMR/AMR-

WB speech rate is less likely to be increased.


l UL 6A2 event relative thresholdUL 6B2 event relative threshold

l UL 6A2 event relative threshold > UL 6B1 event relative threshold

Parameter Name UL 6B2 event relative threshold

Parameter ID UlThd6B2

GUI Range 1 to 83


1 to 83

Step: 1 (dB)

Default Value 10

Optional/Mandatory

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Description This parameter defines the measurement reporting threshold atwhich the event 6B2 is triggered.


The event 6B2 refers to the event triggered when the measured value

is lower than the lower absolute threshold 6B2. When the event 6B2

is triggered, AMRC/AMRC-WB will increase the AMR/AMR-WB

speech rate by one level.



6B2 event relative threshold.



smaller possibility of triggering the request for AMR/AMR-WB

speech rate increase. Accordingly, the AMR/AMR-WB speech rate

is less likely to be increased.


UL 6B2 event relative thresholdUL 6A2 event relative threshold

Event Reporting

After establishing an AMR/AMR-WB speech service, the UTRAN sends the UE aMEASUREMENT CONTROL message to configure

l the TX power threshold of 6A1, 6B1, 6A2, 6B2, and 6D.

l the trigger time of 6A1, 6B1, 6A2, 6B2, and 6D.

Then, the UE measures the TX power in real time, filters the measurement results, and makes

judgments as follows:

l If the UE TX power is higher than TX power threshold 6A1 continuously for a period longer

than that defined by Amr trigger time 6A1 and the TRIGGERED_6A1_EVENTvariable

is FALSE, event 6A1 is triggered and the TRIGGERED_6A1_EVENTvariable is set to

TRUE.

l If the TRIGGERED_6A1_EVENTvariable is TRUE and the UE TX power is lower than

TX power threshold 6A1, the TRIGGERED_6A1_EVENTvariable is set to FALSE.

l If the UE TX power is lower than TX power threshold 6B1 continuously for a period longer

than that defined by Amr trigger time 6B1 and the TRIGGERED_6B1_EVENTvariable

is FALSE, event 6B1 is triggered and the TRIGGERED_6B1_EVENTvariable is set to

TRUE.

l If the TRIGGERED_6B1_EVENTvariable is TRUE and the UE TX power is higher than

TX power threshold 6B1, the TRIGGERED_6B1_EVENTvariable is set to FALSE.

l If the UE TX power is lower than TX power threshold 6B2 continuously for a period longer

than that defined by Amr trigger time 6B2 and the TRIGGERED_6B2_EVENTvariable

is FALSE, event 6B2 is triggered and the TRIGGERED_6B2_EVENTvariable is set toTRUE.

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l If the TRIGGERED_6B2_EVENTvariable is TRUE and the UE TX power is higher than

TX power threshold 6B2, the TRIGGERED_6B2_EVENTvariable is set to FALSE.

l If the UE TX power is higher than TX power threshold 6A2 continuously for a period longer

than that defined by Amr trigger time 6A2 and the TRIGGERED_6A2_EVENTvariable

is FALSE, event 6A2 is triggered and the TRIGGERED_6A2_EVENTvariable is set toTRUE.

l If the TRIGGERED_6A2_EVENTvariable is TRUE and the UE TX power is lower than

TX power threshold 6A2, the TRIGGERED_6A2_EVENTvariable is set to FALSE.

l If the UE Tx power equals the maximum UE TX power for a time period defined by Amr

trigger time 6D and the variable TRIGGERED_6D_EVENT is set to FALSE, event 6D

is triggered and the variable TRIGGERED_6D_EVENT to TRUE.

l If the variable TRIGGERED_6D_EVENT is set to TRUE and if the UE Tx power is less

than the maximum UE TX power, set the variable TRIGGERED_6D_EVENT to FALSE.

NOTE

For detailed information about the TRIGGERED_6A1_EVENT, TRIGGERED_6A2_EVENT,TRIGGERED_6B1_EVENT, TRIGGERED_6B2_EVENTand TRIGGERED_6D_EVENT variables, see

the 3GPP TS 25.331.

Each time a measurement event is triggered, the UE sends the measurement report to the UTRAN

(as shown in Figure 3-1) and the UL AMRC/AMRC-WB algorithm makes a corresponding

adjustment according to the reported measurement event. For detailed information about the

signaling procedure, see 3.1.2.3 UL AMRC/AMRC-WB Signaling Procedure.

Parameter Name Amr trigger time 6A1

Parameter ID UlAmrTrigTime6A1

GUI Range D0, D10, D20, D40, D60, D80, D100, D120, D160, D200, D240,D320, D640, D1280, D2560, D5000


0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560,

5000

Unit: ms

Default Value D320

Optional/Mandatory

Optional

MML Command SET QUALITYMEAS

ADD CELLQUALITYMEAS

MOD CELLQUALITYMEAS


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Description This parameter defines the duration when the measured value keepsfulfilling the 6A1 measurement condition before the event 6A1 is

triggered.


The event 6A1 refers to the event triggered when the measured valueis higher than the upper absolute threshold 6A1. When the event

6A1 is triggered, the AMR/AMR-WB speech rate should be

decreased. The UL AMRC/AMRC-WB timer starts.

The measured value can be reported after it fulfills the 6A1

measurement condition for a period defined by this parameter. The

trigger time is used to eliminate any momentary change of the

measured value in measurement reporting.

The greater the value of this parameter, the greater the suppression

effect on momentary changes. However, the ability to respond to

measured value changes becomes weaker accordingly.

Parameter Name Amr trigger time 6B1

Parameter ID UlAmrTrigTime6B1



0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560,

5000

Unit: ms

Default Value D320

Optional/Mandatory

Optional


ADD CELLQUALITYMEAS

MOD CELLQUALITYMEAS

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Description This parameter defines the duration when the measured value keepsfulfilling the 6B1 measurement condition before the event 6B1 is

triggered.


The event 6B1 refers to the event triggered when the measured valueis lower than the upper absolute threshold 6B1. When the event 6B1

is triggered, it is an indication that the AMR/AMR-WB speech rate

decrease takes effect. The UL AMRC/AMRC-WB timer stops.

The measured value can be reported after it fulfills the 6B1







Parameter Name Amr trigger time 6A2

Parameter ID UlAmrTrigTime6A2



0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560,

5000

Unit: ms

Default Value D320

Optional/Mandatory

Optional


ADD CELLQUALITYMEAS

MOD CELLQUALITYMEAS


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Description This parameter defines the duration when the measured value keepsfulfilling the 6A2 measurement condition before the event 6A2 is

triggered.


The event 6A2 refers to the event triggered when the measured valueis higher than the lower absolute threshold 6A2. When the event

6A2 is triggered, it is an indication that the AMR/AMR-WB speech

rate increase takes effect. The UL AMRC/AMRC-WB timer stops.

The measured value can be reported after it fulfills the 6A2







Parameter Name Amr trigger time 6B2

Parameter ID UlAmrTrigTime6B2



0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560,

5000

Unit: ms

Default Value D320

Optional/Mandatory

Optional


ADD CELLQUALITYMEAS

MOD CELLQUALITYMEAS

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Description This parameter defines the duration when the measured value keepsfulfilling the 6B2 measurement condition before the event 6B2 is

triggered.


The event 6B2 refers to the event triggered when the measured valueis lower than the lower absolute threshold 6B2. When the event 6B2

is triggered, the AMR/AMR-WB speech rate should be increased.

The UL AMRC/AMRC-WB timer starts.

The measured value can be reported after it fulfills the 6B2







Parameter Name Amr trigger time 6D

Parameter ID UlAmrTrigTime6D



0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560,

5000

Unit: ms

Default Value D640

Optional/Mandatory

Optional


ADD CELLQUALITYMEAS

MOD CELLQUALITYMEAS

Description Duration when the measured value of Amr keeps fulfilling the 6d

measurement condition before the event 6d is triggered. For ULmeasurement, the event reporting mode is used. The event 6d refers

to the event triggered when the measured value is higher than the

upper absolute threshold 6d. When the event 6d is triggered, the

AMR/AMR-WB speech rate should be decreased. The measured

value can be reported after it fulfills the condition for the trigger

time specified by this parameter. The trigger time is used to

eliminate any sudden change of the measured value in measurement

reporting. The greater the trigger time is, the greater the suppression

effect on sudden changes. However, the ability to respond to

measured value changes will become smaller correspondingly.


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UL AMRC/AMRC-WB Action

Based on the event reports from the UE, the UL AMRC/AMRC-WB algorithm takes associated

AMRC/AMRC-WB actions.

Principles of the UL AMRC/AMRC-WB Algorithm

The principles of the UL AMRC/AMRC-WB algorithm are as follows:

l To steer the UL permitted highest AMR/AMR-WB speech codec mode up, the following

requirements must be satisfied:

The UE TX power is below a certain threshold.

The UL load resource is not in congestion state.

l To steer the UL permitted highest AMR/AMR-WB speech codec mode down, the UE TX

power must be higher than a certain threshold.

The UL AMRC/AMRC-WB algorithm steers the UL permitted highest AMR/AMR-WB speechcodec mode up or down in the controllable mode set by only one level each time.

Details of the UL AMRC/AMRC-WB Algorithm

The UL AMRC/AMRC-WB algorithm adjusts the UL permitted highest AMR/AMR-WB

speech codec mode as follows:

l When an event 6A1 or 6D is received, the UL AMRC/AMRC-WB algorithm decreases the

UL permitted highest AMR/AMR-WB speech codec mode by one level and starts the UL

AMRC/AMRC-WB timer whose length is defined by Wait Timer for Uplink Rate

Adjustment of Traffic AMR. If the rate before the decrease is GBR or rate decrease fails,

handover can be performed. For details, refer to 3.3.1 Link Stability Control Algorithmfor AMR/AMR-WB Speech Services.

If the event 6B1 or 6B2 is received before the UL AMRC/AMRC-WB timer expires,

the adjustment is completed. Then, the UL AMRC/AMRC-WB algorithm stops the UL

AMRC/AMRC-WB timer and ends the adjustment.

If no event 6B1 or 6B2 is received before the UL AMRC/AMRC-WB timer expires and

if the current rate is higher than GBR, the adjustment is not complete. The UL AMRC/

AMRC-WB algorithm decreases the UL permitted highest AMR/AMR-WB speech

codec mode by one more level and restarts the UL AMRC/AMRC-WB timer. If the rate

before the decrease is GBR, handover can be performed. For details or rate decrease

fails, refer to 3.3.1 Link Stability Control Algorithm for AMR/AMR-WB Speech

Services.

l When an event 6B2 is received and UL load resource is not in congestion state, the UL

AMRC/AMRC-WB algorithm increases the UL permitted highest AMR/AMR-WB speech

codec mode by one level and starts the UL AMRC/AMRC-WB timer whose length is

defined by Wait Timer for Uplink Rate Adjustment of Traffic AMR. If the rate before

the increase is the maximum one in the controllable mode set, no increase will be performed,

and the UL AMRC/AMRC-WB timer does not start.

If the event 6A2 or 6A1 is received before the UL AMRC/AMRC-WB timer expires,

the adjustment is completed. Then, the UL AMRC/AMRC-WB algorithm stops the UL

AMRC/AMRC-WB timer and ends the adjustment.

If no event 6A2 or 6A1 is received before the UL AMRC/AMRC-WB timer expires

and if UL load resource is still not in congestion state, the adjustment is not complete.The UL AMRC/AMRC-WB algorithm increases the UL permitted highest AMR/AMR-

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WB speech codec mode by one more level and restarts the UL AMRC/AMRC-WB

timer. If the rate before the increase is the maximum one in the controllable mode set,

no increase will be performed, and the UL AMRC/AMRC-WB timer does not restart.

NOTE

In current version, there are two rates in the controllable mode set at most.

Table 3-2 UL AMRC/AMRC-WB algorithm

Event Permitted Highest AMR/AMR-WBSpeech Codec Mode

UL AMRC/AMRC-WB Timer

6A1 Started

6B1 Stopped

6A2 Stopped

6B2 Started

: depicts decrease in the permitted highest AMR/AMR-WB speech codec mode.

: depicts increase in the permitted highest AMR/AMR-WB speech codec mode.

: depicts no change on the current permitted highest AMR/AMR-WB speech codec mode.

If event 6B1 is reported when the permitted highest AMR/AMR-WB speech codec mode is

, then no adjustment related to event 6B1 is made.

If event 6A2 is reported when the permitted highest AMR/AMR-WB speech codec mode is

, then no adjustment related to event 6A2 is made.

NOTE

If the event 6A2 or 6B1 is received when the UL AMRC/AMRC-WB timer is not started, the AMRC/

AMRC-WB algorithm regards it as a normal variation of UE TX power and does not make any adjustment.

Parameter Name Wait Timer for Uplink Rate Adjustment of Traffic AMR

Parameter ID AmrUlRateAdjTimerLen

GUI Range 20 to 64000

Physical Range &

Unit

20 to 64000

Unit: ms

Default Value 3000

Optional/Mandatory

Optional

MML Command SET QOSACT


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Description This timer is used to trigger a second adjustment over the UL AMR/AMR-WB mode. It defines the duration of waiting for voice quality

response to the UL AMR/AMR-WB mode adjustment. The UL

AMRC/AMRC-WB timer starts when UL AMRC/AMRC-WB

mode adjustment is initiated and stops when next measurementreport is received. If the UL AMRC/AMRC-WB timer is timeout,

it indicates that the measurement report is not received. That is, the

measured value is still at the same state as the value measured before

the last UL AMRC/AMRC-WB mode adjustment. This indicates

that the AMRC/AMRC-WB mode adjustment has no obvious effect

and that a second AMRC/AMRC-WB mode adjustment is required.

The greater the UL AMRC/AMRC-WB timer is, the smaller the

frequency of AMRC/AMRC-WB mode adjustment. However, the

ability to respond to measured value changes will become smaller

correspondingly.

UL AMRC/AMRC-WB Signaling Procedure

This describes UL AMRC/AMRC-WB signaling procedures.

As shown in Figure 3-3, the UTRAN sends the information to the UE through a

MEASUREMENT CONTROL message

l the TX power threshold of 6A1, 6B1, 6A2, 6B2, and 6D.

l the trigger time of 6A1, 6B1, 6A2, 6B2, and 6D.

Figure 3-3 Signaling procedure of measurement control

As shown in Figure 3-4, the UE reports events 6A1, 6B1, 6A2, ,6B2 or 6D by sending a

MEASUREMENT REPORT message.

Figure 3-4 Signaling procedure of measurement reporting

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As shown in Figure 3-5, the RNC adjusts the UL permitted highest AMR/AMR-WB speech

codec mode by sending a TRANSPORT FORMAT COMBINATION CONTROL message and

adjusts the UL bandwidth by sending a QAAL2 MODIFY message.

Figure 3-5 Signaling procedure of UL AMR/AMR-WB speech codec mode adjustment

3.1.3 AMRC/AMRC-WB Algorithm Based on Downlink StabilityThe DL AMRC algorithm steers the DL permitted highest AMR speech codec mode up or down

according to the DPDCH transmit (TX) power.

3.1.3.1 DL Measurement and Event Reporting


results with associated thresholds, the RNC triggers AMRC/AMRC-WB actions.

3.1.3.2 DL AMRC/AMRC-WB Algorithm

The DL AMRC/AMRC-WB algorithm steers the DL permitted highest AMR/AMR-WB speech

codec mode up or down according to the DPDCH transmit (TX) power.

3.1.3.3 DL AMRC/AMRC-WB Signaling Procedure

This describes DL AMRC/AMRC-WB signaling procedures.

DL Measurement and Event Reporting


results with associated thresholds, the RNC triggers AMRC/AMRC-WB actions.

DL Measurement

In the downlink, the measurement quantity is the DPDCH transmit (TX) power.

DL Events and Thresholds

DL AMRC/AMRC-WB events consist of E1, E2, F1, and F2.

The thresholds E1, E2, F1, and F2 in Figure 3-6 are specific for measurement events E1, E2,

F1, and F2 respectively.


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Figure 3-6 DL Events and Thresholds

In Figure 3-6:

l

For event E1, the average TX power on the DPDCH is higher than the TX power thresholdE1.

l For event E2, the average TX power on the DPDCH is lower than the TX power threshold

E2.

l For event F1, the average TX power on the DPDCH is lower than the TX power threshold

F1.

l For event F2, the average TX power on the DPDCH is higher than the TX power threshold

F2.

The Delta_E1, Delta_E2, Delta_F1, and Delta_F2 in Figure 3-6 refer to the following relative

values respectively:

l The relative value between the TX power threshold E1 and the RL Max DL TX power

l The relative value between the TX power threshold E2 and the RL Max DL TX power

l The relative value between the TX power threshold F1 and the RL Max DL TX power

l The relative value between the TX power threshold F2 and the RL Max DL TX power

Therefore, Delta_E1, Delta_E2, Delta_F1, and Delta_F2 are relative measurement thresholds.

A set of relative measurement thresholds for all AMR/AMR-WB services are configured. The

set includes the following parameters:

l DL E1 event relative threshold

l DL E2 event relative threshold

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l DL F1 event relative threshold

l DL F2 event relative threshold

The measurement thresholds, that is, the absolute measurement thresholds, are calculated on the

basis of the following formula:l Measurement threshold E1 = RL Max DL TX power DL E1 event relative threshold

l Measurement threshold E2 = RL Max DL TX power DL E2 event relative threshold

l Measurement threshold F1 = RL Max DL TX power DL F1 event relative threshold

l Measurement threshold F2 = RL Max DL TX power DL F2 event relative threshold

Parameter Name RL Max DL TX power

Parameter ID RlMaxDlPwr

GUI Range 350 to 150


35 to 15

Step: 0.1 (dB)

Default Value None

Optional/Mandatory Mandatory

MML CommandADD CELLRLPWR

MOD CELLRLPWR

DescriptionThis parameter defines the maximum downlink transmit power of

radio link. This parameter should fulfill the coverage requirement

of the network planning.

Parameter Name DL E1 event relative threshold

Parameter ID DlThdE1

GUI Range 0 to 559


0 to 55.9

Step: 0.1 (dB)

Default Value 50

Optional/Mandatory Optional


SET AMRCWB


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Description This parameter defines the threshold E1 of DL AMR/AMR-WBmode adjustment.

For DL measurement, the periodical reporting mode applies.

When the value calculated from the measurement report is higher

than the upper threshold E1, AMRC/AMRC-WB will decrease

the DL AMR/AMR-WB speech rate by one level.


threshold = RL Max DL TX power DL E1 event relative

threshold.



greater possibility of triggering the request for AMR/AMR-WB

speech rate decrease. Accordingly, the AMR/AMR-WB speech

rate is more likely to be decreased.


DL E1 event relative thresholdDL E2 event relative threshold

Parameter Name DL E2 event relative threshold

Parameter ID DlThdE2

GUI Range 0 to 559


0 to 55.9

Step: 0.1 (dB)

Default Value 50



SET AMRCWB

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Description This parameter defines the threshold E2 of DL AMR/AMR-WBmode adjustment.


When the value calculated from the measurement report is lower

than the upper threshold E2, AMRC/AMRC-WB will stop

adjusting the DL AMR/AMR-WB speech rate.


threshold = RL Max DL TX power DL E2 event relative

threshold.



smaller possibility of triggering the request for stopping AMR/

AMR-WB speech rate decrease. Accordingly, the AMR/AMR-

WB speech rate is more likely to be decreased.


l DL E2 event relative thresholdDL E1 event relative threshold

l DL E2 event relative threshold < DL F2 event relative threshold

Parameter Name DL F1 event relative threshold

Parameter ID DlThdF1

GUI Range 1 to 560


0.1 to 56

Step: 0.1 (dB)

Default Value 120



SET AMRCWB


RAN






45/180

Description This parameter defines the threshold F1 of DL AMR/AMR-WBmode adjustment.


When the value calculated from the measurement report is lower

than the lower threshold F1, AMRC/AMRC-WB will increase the

DL AMR/AMR-WB speech rate by one level.


threshold = RL Max DL TX power DL F1 event relative

threshold.



smaller possibility of triggering the request for AMR/AMR-WB

speech rate increase. Accordingly, the AMR/AMR-WB speech

rate is less likely to be increased.


DL F1 event relative thresholdDL F2 event relative threshold

Parameter Name DL F2 event relative threshold

Parameter ID DlThdF2

GUI Range 1 to 560


0.1 to 56

Step: 0.1 (dB)

Default Value 120



SET AMRCWB

RAN




3-29


46/180

Description This parameter defines the threshold F2 of DL AMR/AMR-WBmode adjustment.


When the value calculated from the measurement report is higher

than the lower threshold F2, AMRC/AMRC-WB will stop

adjusting the DL AMR/AMR-WB speech rate.


threshold = RL Max DL TX power DL F2 event relative

threshold.



greater possibility of triggering the request for stopping AMR/

AMR-WB speech rate increase. Accordingly, the AMR/AMR-

WB speech rate is less likely to be increased.

DL F2 event relative threshold

DL F1 event relative thresholdDL F2 event relative threshold > DL E2 event relative threshol


l DL F2 event relative thresholdDL F1 event relative threshold

l DL F2 event relative threshold > DL E2 event relative threshold

Event Reporting

After establishing a service, the UTRAN sends a request to the NodeB for periodical

measurements of DL Transmitted Code Power (TCP) in the pilot field of DPCCH, and NodeB

sends the TCP measurement reports to the RNC periodically as defined by the DL measurement

reporting period parameter.

The RNC processes the measurement report as follows:

1. The RNC converts DL TCP in the pilot field of DPCCH to the average TX power of the

DPDCH.

2. The RNC compares the average DPDCH TX power with the measurement thresholds E1,

E2, F1 and F2 to determine the type of event.

Parameter Name DL measurement reporting period

Parameter ID DLMEASRPRTPERIOD

GUI Range 1 to 6000


10 to 60000

Step: 10 (ms)

Default Value 480


RAN






47/180

Optional/Mandatory

Optional


SET AMRCWBADD CELLAMRC

ADD CELLAMRCWB

Description This parameter defines the time interval between DL periodicalmeasurement reports. For DL measurement, the periodical reporting

mode applies. The greater the value of this parameter, the lower the

frequency of DL AMR/AMR-WB mode adjustments.

DL AMRC/AMRC-WB AlgorithmThe DL AMRC/AMRC-WB algorithm steers the DL permitted highest AMR/AMR-WB speech

codec mode up or down according to the DPDCH transmit (TX) power.

Principles of the DL