ETSI GSM 08 20-1997 Digital Cellular Telecommunications System (Phase 2+) Rate Adaption on the Base Station System - Mobile-Services Switching Centre (BSS - MSC) Interface《数字蜂窝通信系统_1.pdf
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1、STD-ETSI GSM 08-20-ENGL 2997 m 3400855 0229807 OT3 m GSM GSM 08.20 August 1997 Version 5.2.0 Source: ETSI SMG Reference: TS/SMG-O30820QRl ICs: 33.020 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) Digital cellular telecommunications system (Phase
2、 2+); Rate adaption on the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface (GSM 08.20 version 5.2.0) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sop
3、hia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, ssecretariat - Internet: secretariatetsi.fr Tel.: 43 4 92 94 42 O0 - Fax: +33 4 93 65 47 16 Copyright Notification: No part may be reproduced except as authorized by written petmission. The copyright and the foregoing restriction extend
4、 to reproduction in all media. O European Telecommunications Standards Institute 1997. All rights reserved. STD-ETSI GSM 08-20-ENGL 3777 m 3400855 0229830 835 m Page 2 GSM 08.20 version 5.2.0: August 1997 Whilst every care has been taken in the preparation and publication of this document, errors in
5、 content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETCI Editing and Committee Support Dept.“ at the address shown on the title page. STDOETSI GSM 08.20-ENGL 1777 m 3400855 02298LL 751 m Page 3 GSM 08.20 version 5.2.0: August 1997 Contents
6、Foreword . 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Scope . 7 Normative references . 7 2.1 Abbreviations and definitions 8 General approach 8 The RA0 Function 8 The RA1 Function 8 The RA1“ Function . 9 SplitlCombine and Padding Functions . -9 7.1 7.3 7.4 Data Frame distribution into the channels by the Sp
7、litlCombine function . 9 Initial Substream Synchronisation for Transparent Services . 9 V11 O Frame Synchronisation (TCHE9.6 or TCH/F4.8 channel coding) . 9 7.4.1 Initial V110 Synchronisation . 9 7.4.2 Action on loss of V.110 frame synchronisation for non-transparent services 9 7.4.3 Action on loss
8、of V.11 O frame synchronisation for transparent services . 9 A-TRAU Frame Synchronisation (TCH/F14.4 channel coding) 9 7.5.1 Search for Frame Synchronisation . 9 7.5.3 Action on loss of A-TRAU frame synchronisation . 10 7.6 Network Independent Clocking . 10 7.7 Padding 10 7.2 Substream numbering 9 7
9、.5 The RAl/RAl Function 10 8.1 Radio Interface rate of 12 kbit/s . 10 8.2 Radio Interface rate of 6 kbit/s . 10 8.3 Radio Interface rate of 3.6 kbit/s 10 8.4 Synchronisation . 11 8.5 Idle frames . 11 THE RAl/RAA FUNCTION 11 9.1 Radio Interface rate of 14. 5 kbitk 11 9.2 Synchronisation . 11 9.3 Idle
10、 frames . 11 THE RAA FUNCTION 11 10.1 10.2 Coding of A-TRAU frame . 11 10.2.1 FPS encoding . 12 Framing Pattern Substitution in A-TRAU frame . 12 THE RAA“ FUNCTION . 15 The RA2 Function 15 The Multiplexing Function 15 Support of non-transparent bearer services . 16 14.1 TCH/F9.6 and TCWF4.8 kbi/s ch
11、annel codings . 16 . STDmETSI GSM 08-20-ENGL 1997 = 3400855 0227832 b98 Page 4 GSM 08.20 version 5.2.0: August 1997 14.1.1 Alignment . 17 14.1.2 Support of Discontinuous Transmission (DTX) . 17 14.1.3 Order of Transmission . 17 TCH/F14.4 channel coding 17 14.2.1 Alignment . 18 14.2.2 14.2 Support of
12、 Discontinuous Transmission (DTX) . 18 15 Support of transparent bearer services 18 15.1 TCWF9.6 and TCH/F4.8 channel codings 18 15.1.1 User rate adaptation on the A interface. AIUR less or equal to 38. 4 kbiVs . 18 15.1.2 User rate Adaptation on the A-interface. AIUR greater than 38. 4 kbit/s . 19
13、15.1.3 Relation between AIUR and the number of channels 19 15.1.4 Handling of status bits X. SA. SB . 20 15.1.5 Handling of bits El to E7 . 20 TCH/F14.4 channel coding 20 15.2.1 User rate adaptation on the A interface. AIUR less or equal to 56 kbiVs 20 15.2.2 User Rate Adaptation on the A-interface.
14、 AIUR greater than 56 kbit./s . 20 15.2.3 Relation between AIUR and the number of channels 20 15.2.4 Handling of status bits X and SB 21 15.2 16 Frame Formats 21 Annex A (informative): Frame Pattern Substitution . 23 A.l Special cases 23 A.2 False 2 sequence detection 24 History 25 STD-ETSI GSM 08-2
15、0-ENGL 1997 3400855 0227833 524 Page 5 GSM 08.20 version 5.2.0: August 1997 Foreword This Global System for Mobile communications Technical Specification (GTS) has been produced by the Special Mobile Group (SMG) of the European Telecommunications Standards Institute (ETSI). This GTS defines rate ada
16、ptation functions to be used within the digital cellular telecommunications system. The contents of this GTS are subject to continuing work within SMG and may change following formal SMG approval. Should SMG modify the contents of this GTS it w ill then be republished by ETSI with an identifying cha
17、nge of release date and an increase in version number as follows: Version 5.x.y where: y the third digit is incremented when editorial only changes have been incorporated in the specification; x the second digit is incremented for all other types of changes, .e. technical enhancements, corrections,
18、updates, etc. The specification from which this GTS has been derived was originally based on CEPT documentation, hence the presentation of this GTS may not be entirely in accordance with the ETSVPNE rules. STD-ETSI GSM 08.20-ENGL 1777 3Li00855 02298LLi Lib0 D Page 7 GSM 08.20 version 5.2.0: August 1
19、997 1 scope This Global System for Mobile communications Technical Specification (GTS) defines rate adaptation functions to be used in GSM PLMN Base Station Systems (BSS) transc oders and IWF for adapting radio interface data rates to the 64 kbiis used at the A-interface in accordance with GSM 03.10
20、. The number of Base Station System - Mobile-services Switching Centre (BSS - MSC) traffic channels supporting data rate adaptation may be limited. In this case some channels may not support data rate adaptation. Those that do, must conform to this specification. NOTE: This specification should be c
21、onsidered together with GSM 04.21 to give a complete description of PLMN rate adaptation. 2 Normative references This GTS incorporates by dated and undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications a
22、re listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this GTS only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. 31 41 91 GSM O1 .O4 (ETR 350): “Di
23、gital cellular telecommunications system (Phase 2+); Abbreviations and acronyms“. GSM 02.34: “Digital cellular telecommunications system (Phase2+): High Speed Circuit Switched Data (HSCSD) - Stagel“ GSM 03.10: “Digital cellular telecommunications system (Phase 2+); GSM Public Land Mobile Network (PL
24、MN) connection types“. GSM 03.34 (TS 1 O1 038): “Digital cellular telecommunications system (Phase 2+): High Speed Circuit Switched Data (HSCSD) - Stage2. GSM 04.21 (ETS 300 945): “Digital cellular telecommunications system; Rate adaption on the Mobile Station - Base Station System (MS - BSS) interf
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