AMR Activation Guidelines0704

V14.3.1 AMR Activation Guideline

Document number: PE/BSS/APP/11438 Document issue: 01.02 / EN Document status: Standard Date: 7/2/2004

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Copyright 2004 Nortel Networks, All Rights Reserved

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PE/BSS/APP/11438 01.02 / EN Standard 7/2/2004 Page 2/23

PUBLICATION HISTORY

7/2/2004

Issue 01.02 / EN, Standard

Update after review

6/30/2004

Issue 01.01 / EN, Preliminary

Update after review

6/15/2004

Issue 01.00 / EN, Draft

Document creation




CONTENTS

1 INTRODUCTION .........................................................................................................................4 1.1 OBJECT.................................................................................................................................4 1.2 SCOPE OF THIS DOCUMENT .....................................................................................................4 1.3 AUDIENCE FOR THIS DOCUMENT ..............................................................................................4

2 RELATED DOCUMENTS............................................................................................................5 2.1 APPLICABLE DOCUMENTS........................................................................................................5 2.2 REFERENCE DOCUMENTS........................................................................................................5

3 AMR ACTIVATION OVERALL STRATEGY ...............................................................................6 3.1 AMR CONFIGURATION ............................................................................................................6 3.2 AMR ACTIVATION ..................................................................................................................6

4 OVERALL AMR CONFIGURATION ...........................................................................................8 4.1 INTRODUCTION.......................................................................................................................8 4.2 SOFTWARE VERSIONS.............................................................................................................8

4.2.1 AMR Parameters settings .............................................................................................9

5 AMR COUNTER LIST DEFINITION..........................................................................................10 5.1 INTRODUCTION.....................................................................................................................10 5.2 BSC COUNTER LIST.............................................................................................................10

6 AMR ADAPTATION TABLE .....................................................................................................15 6.1 INTRODUCTION.....................................................................................................................15 6.2 TABLE CUSTOMIZATION ........................................................................................................16 6.3 PRE-DEFINED TABLES ...........................................................................................................17

6.3.1 typical table.................................................................................................................17 6.3.2 optimistic table ............................................................................................................17 6.3.3 pessimistic table..........................................................................................................18

6.4 CUSTOMIZED TABLES............................................................................................................19 6.4.1 AMR optimized table...................................................................................................19 6.4.2 AMR 10.2 only table....................................................................................................20 6.4.3 AMR 5.9 only table......................................................................................................20

7 AMR RECOMMENDED PARAMETERS...................................................................................21

8 ABBREVIATIONS AND DEFINITIONS.....................................................................................23 8.1 ABBREVIATIONS ...................................................................................................................23 8.2 DEFINITIONS.........................................................................................................................23




1 INTRODUCTION

1.1 OBJECT

The purpose of this document is to provide general guidelines for activating AMR feature on a BSS network.

This document could be used as a check-list memorandum when activating AMR on a live network.

1.2 SCOPE OF THIS DOCUMENT

The document is compliant with the BSS release V14.3.1

It provides:

- general indication for AMR activation on a BSS side

- the list of necessary counters for a proper monitoring of AMR feature

- indication on AMR table customization

- a summary of the recommended AMR parameters

.

It is not the scope of this document:

- to provide a full detail of AMR activation procedure from a network integration perspective – see R[6] for this purpose

- to provide AMR engineering guidelines – see R[7] for this purpose

- to provide the full detail of the recommended parameters – see R[2] for this purpose

1.3 AUDIENCE FOR THIS DOCUMENT

The audience for this document is:

- Network integration engineer

- Network datafill engineer

- Network optimization engineer




2 RELATED DOCUMENTS

2.1 APPLICABLE DOCUMENTS

2.2 REFERENCE DOCUMENTS

[R1] PE/SYS/DD/000343 SV713 : AMR Full Rate; SV885 AMR Half Rate

[R2] PE/DCL/DD/0036 BSS Parameters User Guide

[R3] PE/BSS/DD/018 BSS System Functionnal Specification observation

[R4] PE/BSS/APP/191 GSM Performance Monitoring metrics for v14.3 – Internal Document

[R5] PE/DCL/DD/034 BSS Operating Procedures

[R6] DS/BSS/APP/061 AMR CONFIGURATION ON BSS

[R7] PPP/DDD/CCC/NNNN AMR engineering guidelines

[R8] PE/BSC/APP/9438 Fixes BSCe3 and TCUe3 POST CHR v14.3

[R9] PE/BTS/APP/9624 v14.3 BTS patch document

[R10] PE/BSS/APP/11696 General AMR Performance monitoring metrics – External Document




3 AMR ACTIVATION OVERALL STRATEGY

The following chapter presents an overall strategy for activating AMR on a BSS network.

The AMR configuration and activation can be split into 4 phases:

3.1 AMR CONFIGURATION

In order to configure AMR the following actions need to be done:

- AMR should be configured on NSS side (see § 4)

- correct v14.3.1 software should be loaded on each BSS node and equipment using the dedicated NRP (see §4)

- AMR counters should be included in the BSC counter list using BSC counter List editor (see § 5)

- AMR adaptation table should be customized using BSC data configuration utility (see § 6)

- AMR recommended parameters should be set using the dedicated NRP (see §7)

3.2 AMR ACTIVATION

The following strategy is a proposal for the first AMR activation on a network. Based on the AMR VO experience and the intrinsic characteristics of AMR, we recommended to start the first activation with a conservative approach. According to the results obtained and the operator strategy, different axes of tuning can be taken afterwards.

A handover from an AMR area to a non AMR area is equivalent to an external HO as a new vocoder needs to be re-allocated on the TCU side. If AMR needs to be tested in a cluster only, it is advisable to have an area wide enough in order to limit the impact of these external HOs. Hence, a BSC area is preferable for testing AMR.

For the first AMR activation on the field, and because of the robustness of the low codecs, the AMR optimistic table is proposed in order to limit the usage of the low codecs for low C/I and C/N. It is advisable to extent the Radio Link timeout in UL and DL to 32 (see §7).

AMR FROnly with Optimistic

table

AMR Configuration onBSS

HR Activation with customized table AMR Optimization




According to the results and the operator strategy in terms of capacity and coverage, the table for FR values can be tuned and HR can be activated.

The conservative choice would be to implement at this stage the customized table that uses the pessimistic values for HR and optimistic values for FR (see § 6)

The AMR tuning and optimization will be driven by a trade-off between voice-quality, capacity and overall network performance. Refer to R[7] for the AMR engineering studies and guidelines.




4 OVERALL AMR CONFIGURATION

4.1 INTRODUCTION

This chapter provides general information related to the AMR configuration in terms of:

- software versions of BSS elements

- minimum setting of parameters

4.2 SOFTWARE VERSIONS

The following AVL correspond to the v14.3.1 release:

- BSCe3: AVL 17967

- TCUe3: AVL 17937

- S12000: AVL 17626

- S8000 CBCF: AVL 17617

For a complete AVL line-up, please refer to the following internal link:

http://zctfs066.europe.nortel.com:8000/eLineup/current/lineUp_view.php?lineupType=GSM-GPRS&lineup=V14.3.1

The minimum software versions for AMR activation should be :

- BSC Software Version: B3G14030499D

- TCU Software Version: TC314009000

- EDRX Software Version: EDG14F442

- DRX Software Version: CDR14F365

The above software versions include the following AMR fixes from the ML0 load (refer to R[8] and R[9]):

- Q00805145: Intercell HO for AMR channel with criteria on RXLEV

- Q00852130: Assignment request received on ongoing AMR calls leads to DTAP blocking

- Q00854611: Possibility to use L1M based on RXQual for AMR calls (Legacy L1M)

- Q00820887: AMR Power Control Enhancement with limitation of attenuation based on RxLev




4.2.1 AMR PARAMETERS SETTINGS

For the operational AMR configuration and activation on the BSS side:

- refer to the procedure for AMR activation in R[6] for the procedure itself and the creation of dedicated command files

- refer to §7 for the AMR recommended parameters

4.2.1.1 AMR CONFIGURATION

The minimum settings for configuring AMR are:

- On the switch side: FR3 and HR3 codecs should be added in the circuit pool Trunck tables (TRKGRP CICPool option)

- On the signaling point object (Class 2): speechMode parameter should have the following attributes: halfRateAMR, fullRateAMR, fullrate, enhancedfullrate.

- On the transcoder objet (class 2): the coderPoolConfiguration should be set for AMR, fullRate and enhancedFullRate (see chapter § 7 Recommended parameters)

- On the bts objet (class 3):

o The SpeechMode parameter should have the following attribute: FullRate, EnhancedFullRate, fullRateAMR. If HR AMR is required, the attribute halfRateAMR should be added.

o The HrLoadStart parameter should be set to a value different from 0 if HR AMR calls are needed

o the RadioAllocator parameter should have the attribute “speech+data circuit+packet data”

4.2.1.2 AMR ACTIVATION

As SpeechMode (on the signaling Point object), CoderPoolConfiguration and RadioAllocator are class2 parameters, it is recommended to have them configured the earliest in the deployment phase.

It is also advised to update the BSC counter list and to customize the AMR Adaptation table the earliest in the deployment phase as these two operations have to be done on each BSC and require a reset-build BDA operation (planned outage to be scheduled)

AMR can afterwards be activated and de-activated on a cell per cell basis through the class3 parameters on the bts object (Speech Mode, HrLoadStart) with simple command files or using the NRP.




5 AMR COUNTER LIST DEFINITION

5.1 INTRODUCTION

The current paragraph provides the list of AMR counters that are necessary for a proper monitoring of the AMR feature on a BSS v14.3.1.

They can be used for the definition of specific AMR metrics. Refer to R[4] or R[10] for this purpose.

From V12, the Counter List Editor should be used in order to update the counter list on the BSS side. Please refer to R[5] for this purpose

As the number of new counters is significant, it is highly recommended to avoid adding them to the BSC counter list if the AMR feature is not activated.

For full information about these counters, please refer to R[3] “SFS OBS” and R[1] “ AMR Functionnal Note” documents

WARNING : this is not the exhaustive list of the BSC counter list that should be implemented on the BSC. It is only a complementary list of AMR counters that should be added to the usual counters.

5.2 BSC COUNTER LIST

The below counter list does not include:

- the transceiver zone counters. They should be added if transceiver zones are being created on the BSS (concentric cells, monoBCCH…).

- the counters related to usual procedures that are not AMR specific: paging, RACCH access, SDCCH allocation, FR allocation assignment and HO, traffic releases, BTS overload, SCCP, etc…

Counter Q3 Name Id SubId channelActivateSpeechAmrHr 1197 2 channelActivateSpeechAmrFr 1197 3

downlinkPowerCtrlMaxTchCum 1198 0 downlinkPowerCtrlMaxTchEch 1198 0 downlinkPowerCtrlMaxTchMax 1198 0 downlinkPowerCtrlMaxTchMoy 1198 0 uplinkPowerCtrlMaxTchCum 1199 0 uplinkPowerCtrlMaxTchEch 1199 0 uplinkPowerCtrlMaxTchMax 1199 0 uplinkPowerCtrlMaxTchMoy 1199 0

hoNcellsExecution 1200 0 hoNcellsUnsuccessTchChlR 1204 0




Counter Q3 Name Id SubId hoNcellsUnsuccessTchTimer 1204 1 hoNcellsUnsuccessTchOther 1204 2 amrFrSpeechAlgoFallBack 1206 1

tchHrAllocatedTchAllocation 1610 0 tchHrAllocatedPrimoAllocation 1610 1

tchHrAllocatedOverflowAllocation 1610 2 tchHrAveragedUsedTchAllocationCum 1612 0 tchHrAveragedUsedTchAllocationEch 1612 0 tchHrAveragedUsedTchAllocationMax 1612 0 tchHrAveragedUsedTchAllocationMoy 1612 0

tchHrAveragedUsedPrimoAllocationCum 1612 1 tchHrAveragedUsedPrimoAllocationEch 1612 1 tchHrAveragedUsedPrimoAllocationMax 1612 1 tchHrAveragedUsedPrimoAllocationMoy 1612 1

tchHrAveragedUsedOverflowAllocationCum 1612 2 tchHrAveragedUsedOverflowAllocationEch 1612 2 tchHrAveragedUsedOverflowAllocationMax 1612 2 tchHrAveragedUsedOverflowAllocationMoy 1612 2

tchHrRessourceFailure 1614 0 tchHrAllocated 1745 0

tchHrAveragedUsedCum 1747 0 tchHrAveragedUsedEch 1747 0 tchHrAveragedUsedMax 1747 0 tchHrAveragedUsedMoy 1747 0

amrFrHoSuccessOutgoingTch 1780 1 amrHrHoSuccessOutgoingTch 1780 2

amrFrTchAllocated 1900 0 amrFrTchAllocatedTrZone 1900 0

amrFrTchStdAveragedUsedCum 1901 0 amrFrTchStdAveragedUsedEch 1901 0 amrFrTchStdAveragedUsedMax 1901 0 amrFrTchStdAveragedUsedMoy 1901 0

amrFrTchConnectionDurationCum 1902 0 amrFrTchConnectionDurationEch 1902 0 amrFrTchConnectionDurationMax 1902 0 amrFrTchConnectionDurationMoy 1902 0 amrHrTchConnectionDurationCum 1902 1 amrHrTchConnectionDurationEch 1902 1 amrHrTchConnectionDurationMax 1902 1 amrHrTchConnectionDurationMoy 1902 1

amrFrTchSuccessfullyAssigned 1903 0 amrHrTchSuccessfullyAssigned 1903 1

amrFrTchAssignFailure 1904 0 amrHrTchAssignFailure 1904 1

downlinkPowerCtrlMaxTchAmrFrCum 1906 0 downlinkPowerCtrlMaxTchAmrFrEch 1906 0 downlinkPowerCtrlMaxTchAmrFrMax 1906 0 downlinkPowerCtrlMaxTchAmrFrMoy 1906 0 uplinkPowerCtrlMaxTchAmrFrCum 1907 0 uplinkPowerCtrlMaxTchAmrFrEch 1907 0




Counter Q3 Name Id SubId uplinkPowerCtrlMaxTchAmrFrMax 1907 0 uplinkPowerCtrlMaxTchAmrFrMoy 1907 0

RxLevDownlinkAmrFr 1908 0 RxLevUplinkAmrFr 1909 0

RxQualDownlinkAmrFr 1910 0 RxQualUplinkAmrFr 1911 0

msPowerIncControlAmrFr 1912 0 msPowerDecControlAmrFr 1913 0 bsPowerIncControlAmrFr 1914 0 bsPowerDecControlAmrFr 1915 0

CIUplinkAmrFr 1916 0 timingAdvanceAmrFrAvg 1917 0 timingAdvanceAmrFrMax 1917 1

downlinkPowerCtrlMaxTchAmrHrCum 1918 0 downlinkPowerCtrlMaxTchAmrHrEch 1918 0 downlinkPowerCtrlMaxTchAmrHrMax 1918 0 downlinkPowerCtrlMaxTchAmrHrMoy 1918 0 uplinkPowerCtrlMaxTchAmrHrCum 1919 0 uplinkPowerCtrlMaxTchAmrHrEch 1919 0 uplinkPowerCtrlMaxTchAmrHrMax 1919 0 uplinkPowerCtrlMaxTchAmrHrMoy 1919 0

RxLevDownlinkAmrHr 1920 0 RxLevUplinkAmrHr 1921 0

RxQualDownlinkAmrHr 1922 0 RxQualUplinkAmrHr 1923 0

msPowerIncControlAmrHr 1924 0 msPowerDecControlAmrHr 1925 0 bsPowerIncControlAmrHr 1926 0 bsPowerDecControlAmrHr 1927 0

CIUplinkAmrHr 1928 0 timingAdvanceAmrHrAvg 1929 0 timingAdvanceAmrHrMax 1929 1

msLostMeasurementsAmrFr 1930 0 msLostMeasurementsAmrHr 1931 0

capacityHoFiltered 1933 0 intracellAmrFrUpHoRequiredTch 1950 0

intracellAmrFrDownHoRequiredTch 1950 1 amrQualityFrUpHoRequiredTch 1950 2

amrQualityFrDownHoRequiredTch 1950 3 capacityFrToHrHoRequiredTch 1950 4

alarmAmrHrToFrUpHoRequiredTch 1951 0 alarmAmrHrToFrDownHoRequiredTch 1951 1

amrQualityHrUpHoRequiredTch 1951 2 amrQualityHrDownHoRequiredTch 1951 3

amrFrHoRequestOutgoingTch 1952 0 amrHrHoRequestOutgoingTch 1952 1 amrFrHoRequestIntraCellTch 1953 0

amrFrToHrHoRequestIntraCellTch 1953 1 amrHrToFrHoRequestIntraCellTch 1953 2

amrFrHoExecutionIntraCellTch 1954 0




Counter Q3 Name Id SubId amrFrToHrHoExecutionIntraCellTch 1954 1 amrHrToFrHoExecutionIntraCellTch 1954 2

amrFrHoSuccessIntraCellTch 1955 0 amrFrToHrHoSuccessIntraCellTch 1955 1 amrHrToFrHoSuccessIntraCellTch 1955 2

hoNCellsExecutionTchAmrHr 1956 0 hoNCellsExecutionTchAmrFr 1957 0

hoNCellsUnsuccessTchAmrHrHandoverFailure 1958 0 hoNCellsUnsuccessTchAmrHrTimerExpiration 1958 1 hoNCellsUnsuccessTchAmrHrClearCommand 1958 2 hoNCellsUnsuccessTchAmrFrHandoverFailure 1959 0 hoNCellsUnsuccessTchAmrFrTimerExpiration 1959 1 hoNCellsUnsuccessTchAmrFrClearCommand 1959 2

trafficReleaseAmrFrLapdmCause 1960 0 trafficReleaseAmrFrRadioCause 1960 1 trafficReleaseAmrFrOthersCause 1960 2 trafficReleaseAmrHrLapdmCause 1961 0 trafficReleaseAmrHrRadioCause 1961 1 trafficReleaseAmrHrOthersCause 1961 2 hoNCellsRequestOutgoingAmrHr 1963 0 hoNCellsRequestOutgoingAmrFr 1964 0

amrFrUplinkCodec475 1975 0 amrFrUplinkCodec59 1975 1 amrFrUplinkCodec67 1975 2

amrFrUplinkCodec102 1975 3 amrHrUplinkCodec475 1976 0 amrHrUplinkCodec59 1976 1 amrHrUplinkCodec67 1976 2

amrFrDownlinkCodec475 1977 0 amrFrDownlinkCodec59 1977 1 amrFrDownlinkCodec67 1977 2

amrFrDownlinkCodec102 1977 3 amrHrDownlinkCodec475 1978 0 amrHrDownlinkCodec59 1978 1 amrHrDownlinkCodec67 1978 2

amrFrBadSpeechFramesCodec475 1979 0 amrFrBadSpeechFramesCodec59 1979 1 amrFrBadSpeechFramesCodec67 1979 2

amrFrBadSpeechFramesCodec102 1979 3 amrFrValidSpeechFramesCodec475 1980 0 amrFrValidSpeechFramesCodec59 1980 1 amrFrValidSpeechFramesCodec67 1980 2

amrFrValidSpeechFramesCodec102 1980 3 amrHrBadSpeechFramesCodec475 1981 0 amrHrBadSpeechFramesCodec59 1981 1 amrHrBadSpeechFramesCodec67 1981 2

amrHrValidSpeechFramesCodec475 1982 0 amrHrValidSpeechFramesCodec59 1982 1 amrHrValidSpeechFramesCodec67 1982 2

amrUplinkNoDataFrames 1983 0




Counter Q3 Name Id SubId amrDownlinkNoDataFrames 1983 1

incAmrFrUpModif 1984 0 decAmrFrUpModif 1984 1

incAmrFrDownModif 1985 0 decAmrFrDownModif 1985 1

incAmrHrUpModif 1986 0 decAmrHrUpModif 1986 1

incAmrHrDownModif 1987 0 decAmrHrDownModif 1987 1

amrReversalPhaseFailure 1988 0




6 AMR ADAPTATION TABLE

6.1 INTRODUCTION

The set of thresholds and hysteresis used for the link adaptation mechanism are configured in three predefined tables and one customizable one. These tables are chosen on a per cell basis through the setting of the bts object AmrAdaptationSet parameter. This parameter can take the following values:

- 0: for the typical table

- 1: for the optimistic table

- 2: for the pessimistic table

- 3: for the customized table

The current chapter provides some information about the 3 pre-defined tables and the following customized tables:

- AMR optimized table

- AMR 10.2 FR only table

- AMR 5.9 only table

The above tables have been used for several purposes during the AMR VO and are given for information purposes.

In all cases, the customization of a table requires an ONLINE reset of the BSC and a build BDA.Thus, a planned outage of more than 30mn according to the nb of BTSs.




6.2 TABLE CUSTOMIZATION

The customization of the AMR table labels (label 81 to label 125) is done using the BSC data configuration utility of the OMC-R. Please refer to the BSS Operational Principles document R[5] for full details of the procedure itself.

The labels correspondence is shown is the following table

uplink downlink

slow MS - no FH

fast MS - no FH 4FH

ideal FH (>=8)

SFH 900 TU3

5,9 -> 4,75 81 90 99 108 117 6,7 -> 5,9 82 91 100 109 118 10,2 -> 6,7 83 92 101 110 119 FR

th

resh

olds

12,2 -> 10,2 84 93 102 111 120

FR hysteresis 85 94 103 112 121 5,9 -> 4,75 86 95 104 113 122 6,7 -> 5,9 87 96 105 114 123 H

R

thre

shol

ds

7,4 -> 6,7 88 97 106 115 124

HR hysteresis 89 98 107 116 125




6.3 PRE-DEFINED TABLES

This paragraph provides details regarding the 3 predefined AMR tables:

- the typical table

- the optimistic table

- the pessimistic table

These tables are provided in this chapter for information. The values cannot be changed.

6.3.1 TYPICAL TABLE

The typical table is settable through the AmrAdaptationSet parameter set to 0 on the bts object

The parameters associated to this table cannot be modified.

Values are expressed in dB

6.3.2 OPTIMISTIC TABLE

The optimistic table is settable through the AmrAdaptationSet parameter set to 1 on the bts object


downlinkslow MS -

no FHfast MS - no

FH 4FHideal FH

(>=8)SFH 900

TU3

5,9 -> 4,75 8 2.5 3.5 2.5 4

6,7 -> 5,9 10 4 5 4 5.5

10,2 -> 6,7 12.5 6.5 7.5 6.5 7.5

12,2 -> 10,2 17.5 12.5 12.5 12.5 13.5

FR hysteresis 2.5 1.5 2 1.5 2

5,9 -> 4,75 12.5 10 10.5 10 11

6,7 -> 5,9 14 12 12.5 12 12.5

7,4 -> 6,7 19 17 17.5 17 16.5

HR hysteresis 3.5 2 2 2 3

uplink

HR

th

resh

olds

FR th

resh

olds




Values are expressed in dB.

6.3.3 PESSIMISTIC TABLE

The pessimistic table is settable through the AmrAdaptationSet parameter set to 2 on the bts object.


Values are expressed in dB.

downlinkslow MS -

no FHfast MS - no

FH 4FHideal FH

(>=8)SFH 900

TU3

5,9 -> 4,75 5.5 2 2.5 2 4

6,7 -> 5,9 6.5 3.5 4 3.5 4.5

10,2 -> 6,7 10 5.5 6.5 5.5 7

12,2 -> 10,2 15 12 11.5 12 12

FR hysteresis 3.5 1.5 2 1.5 2

5,9 -> 4,75 9.5 8.5 9 8.5 10.5

6,7 -> 5,9 10.5 10.5 10.5 10.5 12

7,4 -> 6,7 15.5 15.5 15.5 15.5 17

HR hysteresis 3.5 3 3 3 2

FR th

resh

olds

uplink

HR

th

resh

olds

dow nlinkslow M S - no FH

fast M S - no FH 4FH

ideal FH (>=8)

SFH 900 TU3

5,9 -> 4,75 11 6 7 6 5

6,7 -> 5,9 12.5 6.5 8 6.5 6

10,2 -> 6,7 16 9.5 11 9.5 8.5

12,2 -> 10,2 20.5 14 16 14 13.5

FR hysteresis 3 2 2 2 3

5,9 -> 4,75 14.5 13 13.5 13 12.5

6,7 -> 5,9 15 13.5 14 13.5 13

7,4 -> 6,7 19 18.5 19 18.5 18

HR hysteresis 4.5 2.5 2.5 2.5 3

uplink

FR th

resh

olds

HR

th

resh

olds




6.4 CUSTOMIZED TABLES

The following tables are example of tables that have been used extensively during the AMR VO.

The optimized one is the resulting table from the different VO testings and issues related to AMR. It’s a compromise table between a extensive usage of 10.2 codec and a limitation of the low codecs.

10.2codec only and 5.9codec only tables are given here for example if there is a need to test these codecs individually.

In all cases, the customization of the AMR table requires an ONLINE reset of the BSC and a build BDA. As a consequence, a planned outage of more than 30mn according to the nb of BTSs should be considered.

6.4.1 AMR OPTIMIZED TABLE

The following table is a compromise between a dominant FR 10.2 usage and a limitation of the low codec usage. For thresholds below 10.2, it corresponds to the “optimistic” values in FR.

Values are entered by step of 0.5dB

If 4.75 codec needs to be avoided, labels 80, 90, 99, 108 and 117 should be set to 0.

downlinkslow MS - no

FH fast MS - no FH 4FHideal FH

(>=8)SFH 900

TU35,9 -> 4,75 11 4 5 4 86,7 -> 5,9 13 7 8 7 910,2 -> 6,7 20 11 13 11 1412,2 -> 10,2 39 28 32 28 35FR hysteresis 3 3 4 3 45,9 -> 4,75 25 20 21 20 25

6,7 -> 5,9 28 27 28 27 34

7,4 -> 6,7 36 37 38 37 38

HR hysteresis 4 5 5 5 6

uplink

FR

thre

shol

ds

HR

th

resh

old

s




6.4.2 AMR 10.2 ONLY TABLE

The following table is a customized table that enables the 10.2 FR only usage. The HR parameters remain the same as the previous table.


6.4.3 AMR 5.9 ONLY TABLE

The following table is a customized table that enables the 5.9 FR only usage. The HR parameters remain the same as the previous table.

With this kind of table, if HR is enabled, FR to HR codec mode change handover is not possible. The only HR calls will be through DirectAllocation setting. The HR penetration will be drastically reduced. On the other hand0, HR to FR codec mode change handover is possible




(>=8)SFH 900

TU35,9 -> 4,75 0 0 0 0 06,7 -> 5,9 0 0 0 0 010,2 -> 6,7 0 0 0 0 012,2 -> 10,2 39 28 32 28 35FR hysteresis 0 0 0 0 05,9 -> 4,75 25 20 21 20 25

6,7 -> 5,9 28 27 28 27 34

7,4 -> 6,7 36 37 38 37 38


uplink

FR

thre

shol

ds

HR

th

resh

old

s



(>=8)SFH 900

TU35,9 -> 4,75 0 0 0 0 06,7 -> 5,9 110 110 110 110 11010,2 -> 6,7 112 112 112 112 11212,2 -> 10,2 112 112 112 112 112FR hysteresis 0 0 0 0 05,9 -> 4,75 25 20 21 20 25

6,7 -> 5,9 28 27 28 27 34

7,4 -> 6,7 36 37 38 37 38


uplink

FR

thre

shol

ds

HR

th

resh

old

s




7 AMR RECOMMENDED PARAMETERS

The following table provided the recommended AMR parameters.

Note 1: About RadioLinkTimeOut, Rlf1 and T3109 parameters

Due to the robustness of the low codecs versus the signaling link (SACCH) in poor radio conditions, it is highly recommended to extent the Radio Link Time Out to a value equivalent to 16s (32 SACCH blocks). This parameter is common for AMR and EFR capable MS.

NOTE 2 : CoderPoolConfiguration parameter on the transcoder object:

This parameter controls the FR/EFR/AMR/TTY vocoder pool distribution in terms of minimum calls to be handled by the TCU, at the initiation. During normal operation, it dynamically reallocates the resources between the TRMs to meet traffic demand. For the EFR and FR codecs, the archipelago capacity is 72, i.e. 216 circuits per TRM. For the AMR codec, the archipelago capacity is 60, i.e.180 circuits per TRM. For the EFR+TTY codec, the archipelago capacity is 48, i.e. 144 circuits per TRM.

For each type of vocoder, the following attributes can be settable MinimumCalls, powerUplink, powerDownlink.

powerUplink, powerDownlink are always set to 0.

Parameter Object Unit/Range Recommended Values ClasscoderPoolConfiguration Transcoder [algoid,Minimumcalls,powerUplink,powerDownlink] see Note1 2

SpeechMode signallingPoint [fullRate, enhancedfullRate, AMR FR, AMR HR] full rate, enhanced full rate,AMR FR,AMR HR 3AMRAdaptationSet bts [0 to 3] 3 3

SpeechMode bts [fullRate, enhancedfullRate, AMR FR, AMR HR] full rate, enhanced full rate,AMR FR,AMR HR 3

HRCellLoadStart bts [0 to 100%] 25% (higher than 0 if HR required) 3HRCellLoadEnd bts [0 to 100%] 0% 3

radioLinkTimeOut bts [4..64] 32 2t3109 bts [2..255] 17 3Rlf1 bts [0..15] 7 2

RadioAllocator bts (see BPUG) voice+data circuit + packet data 2dtxMode bts (see BPUG) frmsShallUseDtx_hrShallUseDtx 3

HRPowerControlTargetMode powerControl [4.75,5.9,6.7,7.4] 7.4 3FRPowerControlTargetMode powerControl [4.75,5.9,6.7,10.2,12.2] 12.2 3

PowerIncrStepSizeDL powerControl [2..30]dB 6 3PowerIncrStepSizeUL powerControl [2..30]dB 6 3PowerRedStepSizeDL powerControl [2..8]dB 2 3PowerRedStepSizeUL powerControl [2..30]dB 2 3

PRequestedCodec HOControl [12..196] step 12 48 3nHRRequestedCodec HOControl [0..196] 24 3nFRRequestedCodec HOControl [0..196] 24 3

AMRHRIntercellCodecModeThreshold HOControl [4.75,5.9,6.7,7.4] 5.9 3AMRFRIntercellCodecModeThreshold HOControl [4.75,5.9,6.7,10.2,12.2] 6.7 3AMRFRIntracellCodecModeThreshold HOControl [4.75,5.9,6.7,10.2,12.2] 4.75 3

AMRiRxLevDLH HOControl [-110 to -47]dBm -75 to -74 dBm 3AMRiRxLevULH HOControl [-110 to -47]dBm -75 to -74 dBm 3

nCapacityFRRequestedCodec HOControl [0..196] 48 3AMRHRToFRIntracellCodecModeThreshold HOControl [4.75,5.9,6.7,7.4] 6.7 3

AMRDirectAllocRxLevUL HOControl [-110 to -47]dBm -80 to -79 dBm 3AMRDirectAllocRxLevDL HOControl [-110 to -47]dBm -75 to -74 dBm 3

AMRDirectAllocIntRxLevUL HOControl [-110 to -47]dBm -80 to -79 dBm 3AMRDirectAllocIntRxLevDL HOControl [-110 to -47]dBm -75 to -74 dBm 3

AmrReserved2 HOControl [0..3] 3 (see Note2) 3capacityTimeRejection HOControl [0..255] 40 3qualityTimeRejection HOControl [0..255] 5 3

hoMarginAMR adjacentCellHO [-63 to 63]hoMarginRxQual in Interference limited area hoMarginRxQual+2 in coverage limited area 3

HOPingpongCombination adjacentCellHO (see BPUG) Add AMRQuality~PBGT if necessary 3FRAMRPriority transceiver [0..2] 1 for BCCH TDMA; 0 for Hopping TDMA 2HRAMRPriority transceiver [0..2] 1 for BCCH TDMA; 0 for Hopping TDMA 2

if AMR is activatedif AMR L1M activated (AmrReserved2=0 or 2)if AMR PWC activated (AmrReserved2=0 or 1)




MinimumCalls can be set differently according to the AMR mobile penetration on the market. By default , TTY MinimalCalls is set to 1

When CoderPoolConfiguration is set as follows:

- fullRateCoder, minimumCalls = 1, powerful = 0, powerDL = 0

- enhancedFullRateCoder, minimumCalls = 1, powerUL = 0, powerDL = 0

- AmrFullHalfRateCoder, minimumCalls = 1, powerUL = 0, powerDL = 0

it is equivalent to partition equally the codec pool resources (25% for each vocoder)





It is equivalent to set the codec pool resources with the following repartition: FR to 3%; EFR to 91%; AMR to 3% and TTY to 3%.





It is equivalent to set the codec pool with the following repartition FR to 13%; EFR to 40%; AMR to 40% and TTY to 7%.

The latest setting would correspond to a market with a high AMR mobile penetration.

NOTE 3 : About AmrReserved2 on HandoverControl object:

- amrReserved2=0

=> AMR alarm handovers based on CMR/CMC (n,p voting)

=> AMR PowerControl algorithm based on CMR/CMC

- amrReserved2=1

=> AMR alarm handovers based on RxQual

=> AMR PowerControl algorithm based on CMR/CMC

- amrReserved2=2

=> AMR alarm handovers based on CMR/CMC (n,p voting)

=> AMR PowerControl algorithm based on RxQual

- amrReserved2=3

=> AMR alarm handovers based on RxQual

=> AMR PowerControl algorithm based on RxQual




8 ABBREVIATIONS AND DEFINITIONS

8.1 ABBREVIATIONS

AMR Adaptative Multi-Rate

C/I Carrier over Interferer

CMC Codec Mode Command

CMI Codec Mode Indication

CMR Codec Mode Request

EFR Enhanced Full Rate vocoder

Erl Erlang

FR Full Rate

FR AMR Full Rate AMR

HR Half Rate

HR AMR Half Rate AMR

L1m Layer one Management

PWCI Potential Worst C/I

RATSCCH Robust AMR Traffic Synchronized Control Channel

TRAU Transcoding and Rate Adaptor Unit

8.2 DEFINITIONS

END OF DOCUMENT

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AMR Activation Guidelines0704