1、GSM GSM 08.04 December 1996 Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-O30804Q ICs: 33.020 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS Digital cellular telecommunications system; Base Station Sy
2、stem - Mobile-services Switching Centre (BSS - MSC) interface; Layer 1 specification (GSM 08.04) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
3、 X.400: c=fr, a=atlac, p=etsi, s=secretariat - Internet: secretaratets.fr Tel.: +33 4 92 94 42 O0 - Fax: +33 4 93 65 47 16 Copyright Notification: No pari may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. 6
4、European Telecommunications Standards Institute 1996. All rights resewed. Page 2 GSM 08.04 version 5.0.0: December 1996 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its
5、accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. Page 3 GSM 08.04 version 5.0.0: December 1996 Contents Foreword . 5 1 Scope ,.7 2 Normative references 7 3 Abbreviations . 7 4 Layer 1 Specification . 7 History 9 STD-ETSI GSM 06.04-ENGL 199b
6、 3400655 0352988 815 Page 4 GSM 08.84 version 5.0.0: December 1996 Blank page STDOETSI GSM 08.04-ENGL L99b 3400855 0152787 751 Page 5 GSM 08.04 version 5.0.0: December 1996 Foreword This Global System for Mobile communications Technical Specification (GTS) has been produced by the Special Mobile Gro
7、up (SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI). This GTS defines the structure of the physical layer (layer 1) of the BSS-MSC interface within the digital cellular telecommunications system. The contents of this GTS are subject to continuing work with
8、in TC-SMG and may change following formal TC-SMG approval. Should TC-SMG modify the contents of this GTS it will then be republished by ETSI with an identifying change of release date and an increase in version number as follows: Version 5.x.y where: y the third digit is incremented when editorial o
9、nly changes have been incorporated in the specif cat ion; x the second digit is incremented for all other types of changes, .e. technical enhancements, corrections, updates, etc. The specification from which this GTS has been derived was originally based on CEPT documentation, hence the presentation
10、 of this GTS may not be entirely in accordance with the ETSVPNE rules. Paga 6 GSM 08.04 version 5.0.0: December 1996 Blank page STD.ETSI GSM 08.04-ENGL L77b 3400855 0352793 3OT-l Page 7 GSM 08.04 version 5.0.0: December 1996 1 Scope This Global System for Mobile communications Technical Specificatio
11、n (GTS) defines the structure of the physical layer (layer 1) of the BSS-MSC interface for supporting traffic channels. Use of the physical layer for supporting Signalling System N0.7 signalling links is covered in GSM 08.06. The physical layer is the lowest layer in the OS1 Reference Model and it s
12、upports all functions required for transmission of bit streams on the physical medium. For this Technical Specification only digital transmission will be considered, the use of analogue transmission is a national concern. 2 Normative references This GTS incorporates by dated and undated reference, p
13、rovisions from other publications. These normative references are cited at the appropriate places in the text and the publications are 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 amendmen
14、t or revision. For undated references, the latest edition of the publication referred to applies. GSM O1 .O4 (ETR 350): “Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms“. CCITT Recommendation G.705: “Characteristics required to terminate digital links on a digital e
15、xchange“. i31 CCITT Recommendation G.709: “Synchronous multiplexing structure“. Pl CCIlT Recommendation G.711: “Pulse code modulation (PCM) of voice frequencies“ . CCIlT Recommendation G.732: “Characteristics of primary PCM multiplex equipment operating at 2 048 kbit/s“. GSM 08.06: “Digital cellular
16、 telecommunications system; Signalling transport mechanism specification for the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface“. 3 Abbreviations Abbreviations used in this GTS are listed in GSM 01.04. 4 Layer 1 Specification All CCITT recommendations referred to are Bl
17、ue Book. Layer 1 shall utilize digital transmission at a rate of 2 048 kbisec with a frame structure of 32 * 64 kbit/sec time slots, as specified in CCIlT Recommendation G.705 section 3. Therefore the physical/electrical characteristics are defined in CCIlT Recommendation G.703. The functional chara
18、cteristics are defined in CCIlT Recommendation G.732 section 2 and 3. Fault conditions should be treated in accordance with CCITT Recommendation G.732 section 4. Speech encoding shall be the A-law as defined in CCIlT Recommendation G.711. The idle pattern must be transmitted on every timeslot that i
19、s not assigned to a channel, and to every timeslot of a channel that is not allocated to a call. The idle pattern shall be O1 O1 O1 OO. STDaETSI GSM 08-04-ENGL L77b 3400855 0352992 E4b Page 8 GSM 08.04 version 5.0.0: December 1996 Synchronization at the BSS far the transmitted 2 048 kbitlsec bit str
20、eam shall be derived from the received 2 048 kbivsec bit stream. Data encoding is covered in GSM 08.20. NOTE: A predetermined number of the 64 kbivsec time slots may be used for signalling, to one or more base station systems. STD-ETSI GSM OB*OLi-ENGL 177b m 3Li00855 0352773 382 m December 1996 Page 9 GSM 08.04 version 5.0.0: December 1996 Publication of GSM 08.04 version 5.0.0 History ISBN 2-7437-1 191 -4 Dpt lgal : Dcembre 1996
