ETSI EN 300 979-2000 Digital Cellular Telecommunications System (Phase 2+) In-Band Control of Remote Transcoders and Rate Adaptors for Half Rate Traffic Channels (GSM 08 61 Version_1.pdf

1、ETSI EN 300 979 V8.0.1 (2000-11) European Standard (Telecommunications series) Digital cellular telecommunications system (Phase 2+); In-band control of remote transcoders and rate adaptors for half rate traffic channels (GSM 08.61 version 8.0.1 Release 1999) (GSM 08.61 version 8.0.1 Release 1999) 2

2、 ETSI EN 300 979 V8.0.1 (2000-1 1) Reference REN/SMG-020861 Q8 Keywords Digital cellular telecommunications system, Global System for Mobile communications (GSM) ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00

3、017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: htti3:lwww. etsi I oq The present document may be made available in more than one electronic version or in print. In

4、any ase of existina c u perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of

5、the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at If you find errors in the present document, send your comment to: editor etsi.fr Copyright Notification No part ma

6、y be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. 8 European Telecommunications Standards Institute 2000. All rights reserved. ETSI (GSM 08.61 version 8.0.1 Release 1999) 3 ETSI EN 300 979 V8.0.1 (2000-11) Con

7、tents Intellectual Property Rights . 5 Foreword 5 1 Scope . 6 2 References . 6 3 Definitions and abbreviations 7 3.1 Definitions 7 3.2 Abbreviations . 7 4 General approach . 8 5 Frame stnicture 10 5.1 16 kbith submultiplexing . 10 5.1.1 Frames for Speech Services 10 5.1.1.1 Frame for Half Rate speec

8、h . 10 5.1.1.2 5.1.2 Data frame . 11 5.1.3 O Essential, or potentially Essential, IPRs notijed to ETSI in respect of ETSI standards“, which is available fi-om the ETSI Secretariat. Latest updates are available on the ETSI Web server -). Pursuant to the ETSI IPR Policy, no investigation, including IP

9、R searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications

10、 series) has been produced by ETSI Technical Committee Special Mobile Group (SMG). The present document defines the protocol between the Base Transceiver Station (BTS) and the remote Transcoder/Rate Adaption Unit (TRAU) for half rate speech, Adaptive Multi-Rate speech and half rate data, within the

11、digital cellular telecommunications system. The contents of the present document is subject to continuing work within SMG and may change following formal SMG approval. Should SMG modi the contents of the present document it will be re-released with an identiing change of release date and an increase

12、 in version number as follows: Version 8.x.y where: 8 indicates Release 1999 of GSM Phase 2+ x the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. y the third digit is incremented when editorial only changes have been incorporated in

13、the specification. National transposition dates Date of adoption of this EN: Date of latest announcement of this EN (doa): Date of latest publication of new National Standard or endorsement of this EN (dop/e): Date of withdrawal of any conflicting National Standard (dow): 3 November 2000 28 February

14、 2001 3 1 August 2001 3 1 August 2001 ETSI (GSM 08.61 version 8.0.1 Release 1999) 6 ETSI EN 300 979 V8.0.1 (2000-11) 1 Scope The present document describes the protocol between the Base Transceiver Station (BTS) and the remote Transcoder/Rate Adaption Unit (TRAU) for speech and data on half rate tra

15、ffic channel (TCH/H). For Half Rate speech and half rate data the protocol is specified for 8 kbit/s and 16 kbit/s submultiplexing scheme. For Adaptive Multi-Rate speech the present document specifies the 8 kBit/s submultiplexing, both for the full and the half rate traffic channels (TCH/AFS and TCH

16、/AHS). The specification for 16 kBit/s submultiplexing is given in Rec GSM 08.60, both for the full and the half rate traffic channels (TCH/AFS and TCH/AHS). The present document should be considered together with the GSM 06 series, GSM 04.21 (Rate Adaption on the MS-BSS Interface) and GSM 08.20 (Ra

17、te Adaption on the BTS/MSC Interface). 2 Refe re nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-speci

18、fic. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same number. For this Release 1999 document, references to GSM doc

19、uments are for Release 1999 versions (version 8.x.y). i31 i41 i51 i61 i71 i81 GSM O 1.02: “Digital cellular telecommunication system (Phase 2+); General description of a GSM Public Land Mobile Network (PLMN)“. GSM O 1.04: “Digital cellular telecommunication system (Phase 2+); Abbreviations and acron

20、yms“. GSM 04.2 1 : “Digital cellular telecommunications system (Phase 2+); Rate adaption on the Mobile Station - Base Station System (MS - BSS) interface“. GSM 05.03: “Digital cellular telecommunications system (Phase 2+); Channel coding“. GSM 06.2 1 : “Digital cellular telecommunications system (Ph

21、ase 2+); Half rate speech; Substitution and muting of lost fi-ames for half rate speech traffic channels“. GSM 06.22: “Digital cellular telecommunications system (Phase 2+); Half rate speech; Comfort noise aspects for half rate speech traffic channels“. GSM 06.4 1 : “Digital cellular telecommunicati

22、ons system (Phase 2+); Half rate speech; Discontinuous Transmission (DTX) for half rate speech traffic channels“. GSM 06.42: “Digital cellular telecommunications system (Phase 2+); “Half rate speech; Voice Activity Detector (VAD) for half rate speech traffic channels“. GSM 08.08: “Digital cellular t

23、elecommunication system (Phase 2+); Mobile Switching Centre - Base Station System (MSC - BSS) interface Layer 3 specification“. GSM 08.20: “Digital cellular telecommunication system (Phase 2+); Rate adaption on the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface“. GSM 08

24、.52: “Digital cellular telecommunication system (Phase 2+); Base Station Controller - Base Transceiver Station (BSC - BTS) interface Interface principles“. ETSI (GSM 08.61 version 8.0.1 Release 1999) 7 ETSI EN 300 979 V8.0.1 (2000-11) i121 i131 i141 i151 i161 i241 i251 i261 i271 i281 i291 i3 01 i3 1

25、1 i321 GSM 08.54: “Digital cellular telecommunication system (Phase 2+); Base Station Controller - Base Transceiver Station (BSC - BTS) interface Layer 1 structure of physical circuits“. GSM 08.58: “Digital cellular telecommunication system (Phase 2+); Base Station Controller - Base Transceiver Stat

26、ion (BSC - BTS) interface Layer 3 specification“. GSM 12.2 1 : “Digital cellular telecommunication system (Phase 2); Network Management (NM) procedures and messages on the A-bis interface“. ITU-T Recommendation 1.460: “Multiplexing, rate adaption and support of existing interfaces“. ITU-T Recommenda

27、tion V. 1 1 O: “Support of data terminal equipments (DTEs) with V-Series interfaces by an integrated services digital network“. GSM 06.7 1 : “Digital cellular telecommunications system; Adaptive Multi-Rate speech processing functions, General Description.“ GSM 06.90: “Digital cellular telecommunicat

28、ions system; Adaptive Multi-Rate speech transcoding“ . GSM 06.9 1 : “Digital cellular telecommunications system; Substitution and muting of lost frames for Adaptive Multi-Rate speech traffic channels“. GSM 06.92: “Digital cellular telecommunications system; Comfort noise aspect for Adaptive Multi-Ra

29、te speech traffic channels“. GSM 06.93: “Digital cellular telecommunications system; Discontinuous Transmission (DTX) for Adaptive Multi-Rate speech traffic channels“. GSM 06.94: “Digital cellular telecommunications system; Voice Activity Detection (VAD) for Adaptive Multi-Rate speech traffic channe

30、ls I. GSM 05.09: “Digital cellular telecommunications system; Link Adaptation“ GSM 08.60: I Digital cellular telecommunications system; In-band control of remote transcoders and rate adaptors for full rate traffic channels“. GSM 08.62: I Digital cellular telecommunications system; Inband Tandem Free

31、 Operation (TFO) of Speech Codecs“. 3 3.1 Definitions and abbreviations Definit ions No specific definitions apply to the present document. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACS AMR BSC BTS ccu CMC CMI CMR DFE ICM PAB ActiveCodec-Set Adapt

32、ive Multi-Rate Base Station Controller Base Transceiver Station Channel Codec Unit CodecModeCommand CodecModeIndication CodecModeRequest Downlink Frame Error InitialCodecMode Phase Alignment Bit ETSI (GSM 08.61 version 8.0.1 Release 1999) 8 ETSI EN 300 979 V8.0.1 (2000-11) PAC RA RIF TAC TAE TFO TFO

33、E TRAU UFE Phase Alignment Command Rate Adaption Request or Indication Flag Time Alignment Command Time Alignment Extension Tandem Free Operation TFO Enable Transcoder and Rate Adaption Unit Uplink Frame Error Other abbreviations used in the present document are listed in GSM 01.04. 4 General approa

34、ch The TRAU shall be controlled by the BTS when it is positioned remote from the BTS. In this case, the speecwdata information and TRAU control signals exchanged between the Channel Codec Unit (CCU) in the BTS and the TRAU shall be transferred in frames denoted “TRAU frames“. The TRAU frames may be

35、carried by either 16 kbits traffic channels or 8 kbits channels. The choice of the traffic channel bit rate or submultiplexing scheme is operator dependent. The TRAU frames have a fixed length of - - 160 bits (20 ms) when 8 kbith submultiplexing is used; 320 bits (20 ms) when 16 kbith submultiplexin

36、g is used. The protocol between the BTS and the TRAU should be the same if the TRAU is positioned either at the MSC site or at the BSC site. In the fist case, the BSC should be considered as transparent for 16 kbits and 8 kbits channels. The TRAU is considered a part of the BSC when the TRAU is remo

37、te from the BTS (see GSM 08.52), and the signalling between the BSC and the TRAU (e.g. detection of call release, handover and transfer of O “Remote Speech Handler Function“ (RSHF); - the RA2 function; - the transcoder function. The functions inside the CCU are: - - “Speech Handler Function“ (SHF);

38、- the RAA function: “Transcoder and Rate Adaptor Control Function“ (TRACF); - the RAl/RAl function; ETSI (GSM 08.61 version 8.0.1 Release 1999) Speech Handler 4 Function 9 b ETSI EN 300 979 V8.0.1 (2000-11) AA ! Speech r+ Transcoder Control Function +and RA .+ - A ? ? 3 control I L-, I signals I I r

39、+ I I RAAM RAI RAI I, I I - the channel codec function. The present document does not describe the procedures inside the TRAU and the CCU. The layout in figure 4.1 is only intended as a reference model. Channel Codec Function Transcoder Function (note) 8kbitls 16ObitROms I + I 16 kbiffs 320biff20ms

40、Remote Speech Handler Speech - Data I 11 II i- _- +-+ -_.-_ ii I I +-p I Radio frames I 4;b I I SpeechlData Remote Transcoder and RA + Control Function NOTE: This technical specification assumes the DTX handler function to be part of the Transcoder Function. Figure GSM 08.6W4.1: Functional entities

41、for handling of control of remote transcoders and rate adaptors ETSI (GSM 08.61 version 8.0.1 Release 1999) 10 ETSI EN 300 979 V8.0.1 (2000-1 1) 5 Frame structure 5.1 16 kbit/s submultiplexing 5.1 .I Frames for Speech Services 5.1 .I .I Frame for Half Rate speech I I Bit number I 5.1 .I .2 Frames fo

42、r Adaptive Multi-Rate Speech See GSM 08.60 for16 kE%it/s submultiplexing. ETSI (GSM 08.61 version 8.0.1 Release 1999) 11 ETSI EN 300 979 V8.0.1 (2000-11) 5.1.2 Data frame ETSI (GSM 08.61 version 8.0.1 Release 1999) 5.1.3 O CMR = ?; RIF = O. O. O. 1: CMI = 5,15; CMR= ?; RIF = O. O. 1 . O: CMI = 5,90;

43、 CMR = ?; RIF = O. O. 1 . 1: RIF = 1. 1.0.0: CMI=?; CMR=5,15; RIF=l. 1 . O . 1: RIF = 1. 1 . 1 . O: RIF = 1. 1 . 1 . 1: RIF = 1. CMI = ?; CMR = 4,75; CMI = ?; CMR = 5,90; CMI = ?; CMR = 6,70; CMI = ?; CMR = 7,40; Frameclassification (C4. C5) is defined and coded as in GSM 08.60. Coding of D-Bits: Th

44、e coding for D55 . D59 is common to all three lower code modes. These bits are reserved for the Configuration Protocol (Config-Prot and MessageNo) in case of Tandem Free Operation, see GSM 08.62. If the BTS does not support TFO or TFO is disabled, then these bits shall be set to “0.0.0.0.0“. AMRMode

45、 4.75 kBits, see GSM 06.90: D1 D3: D4 D26: D27 D51: D52 D54: spare (3 bits), set to “1“ Indexes ofthe LSF submatrices (sl . s23) Indexes of the parameters of first sub-frame (s24. s48) CRCl over bits C1 . C5, sl . s16, s18, s19, s21 . s29, s45 . s48. ETSI (GSM 08.61 version 8.0.1 Release 1999) 23 ET

46、SI EN 300 979 V8.0.1 (2000-11) D55 D59: D60 D72: D73 D75: D76 D96: D97 D99: D100 D112: D113 D115: D116 D126: reserved for TFO Indexes of the parameters of second sub-frame (s49 .s61) CRC2 over bits D55 . D59, s49, s50. Indexes of the parameters of third sub-frame (s62. s82) CRC3 over bits s62, s63,

47、s79 . s82. Indexes of the parameters of fourth sub-frame (s83 . s95) CRC4 over bits s83, s84. spare (1 1 bits); set to “1“. AMRMode 5.15 kBits, see GSM 06.90: D1 D5: D6 . D28: D29 . D51: D52 D54: D55 D59: D60 D78: D79 D81: D82 D100: D101 D103: D104 D122: D123 D125: D126: AMR Mode 5.90 kBits, see GSM

48、 06.90: D1 D26: D27 D51: D52 D54: D55 D59: D60 D80: D81 D105: D106 D126: Time Alignment Bit: T: spare (5 bits); set to “1“ Indexes of the LSF submatrices (sl. s23) Indexes of the parameters of first sub-frame (s24. s46) CRCl over bits C1 . C5, sl . s16, s19 . s29, s42 . s46. reserved for TFO Indexes

49、 of the parameters of second sub-frame (s47 . s65) CRC2 over bits D55. D59, s47, s48, s61. s65. Indexes ofthe parameters ofthird sub-frame (s66 . s84) CRC3 over bits s66, s67, s80 . s84. Indexes ofthe parameters of fourth sub-frame (s85 . s103) CRC4 over bits s85, s86, s99 . s103. spare (1 bits); set to “1“. Indexes ofthe LSF submatrices (sl . s26) Indexes ofthe parameters offirst sub-frame (s27 . s51) CRCl over bits C1 . C5, sl . s17, s27 . s34, s48 . s51. reserved for TFO Indexes of the parameters of second sub-frame (s52 . s72) In