1、GSM - ?CHNICAL PECI FI CATI ON GSM 05.03 August 1996 Version 5.2.0 Source: ETSI TCSMG Reference: TS/SMG-O20503QRl ICs: 33.060.50 Key words: Digitai cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS Digital cellular telecommunica
2、tions system (Phase 2+); Channel coding (GSM 05.03) ETSI European Telecornmunications Standards institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat
3、 - Internet: secretariatQetsi.fr Tel.: +33 92 94 42 O0 - Fax: +33 93 65 47 16 Copyright Notification: No pait may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. Q European Telecommunications Standards Institu
4、te 1996. All rights reserved. ETSI GSM05.03 9b 3400855 OL2374b 797 Page 2 GSM 05.03 version 5.2.0: August 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 accurac
5、y, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. ETSI GSM05-03 76 3400855 0323747 623 Page 3 GSM 05.03 version 5.2.0: August 1996 Contents Foreword . 5 1 Scope 7 1.1 Normative references 7 1.2 Abbreviations . 7 2 General 8 2.1 General organization
6、 8 2.2 Naming Convention . 10 3.1 3.2 3.3 3.4 3.5 3.6 3 Traffic Channels (TCH) . 11 Speech channel at full rate (TCH/FS and TCHEFS) 11 3.1.1 3.1.1.1 CRC calculation . 11 Preliminary channel coding for EFR only 11 3.7 3.1.1.2 Repetition bits 11 3.1.1.3 Correspondence between input and output of preli
7、minary Channel coding for FR and EFR . 12 3.1.2.1 Parity and tailing for a speech frame . 12 3.1 -2.2 Convolutional encoder . 13 3.1.3 Interleaving 13 3.1.4 Mapping on a Burst . 13 Speech channel at half rate (TCHniS) 13 3.2.1 Parity and tailing for a speech frame . 14 3.2.2 Convolutional encoder .
8、14 3.2.3 interleaving 15 3.2.4 Mapping on a burst 15 Data channel at full rate, 12.0 kbitls radio interface rate (9.6 kbis services (TCHlF9.6) 15 3.3.1 Interface with user unit 16 3.3.2 Block code . 16 3.3.3 Convolutional encoder . 16 3.3.4 Interleaving 16 3.3.5 Mapping on a Burst . 16 Data channel
9、at full rate, 6.0 kbits radio interface rate (4.8 kbit/s services (TCH/F4.6) 16 3.4.1 Interface with user unit 17 3.4.2 Block code . 17 3.4.3 Convolutional encoder . 17 3.4.4 Interleaving 17 3.4.5 Mapping on a Burst . 17 Data channel at half rate, 6.0 kbits radio interface rate (4.8 kbis services (T
10、WWH4.8) 17 3.5.1 Intetface with user unit 17 3.5.2 Block code . 18 3.5.3 Convolutional encoder . 18 3.5.4 Interleaving 18 3.5.5 Mapping on a Burst . 18 Data channel at full rate. 3.6 kbit/s radio interface rate (2.4 kbis and less services (TCH/F2.4) 18 3.6.1 Interface with user unit 18 3.6.2 Block c
11、ode . 18 3.6.3 Convolutional encoder . 18 3.6.4 Interleaving 18 3.6.5 Mapping on a Burst . 19 Data channel at half rate, 3.6 kbis radio interface rate (2.4 kbis and less services (TCH/H2.4) . 19 3.7.1 Interface with user unit 19 3.7.2 Block code . 19 channel coding . 12 3.1.2 ETSI GSM05.03 96 m 3400
12、855 012374B 5bT Page 4 GSM 05.03 version 59.0: August 1996 3.7.3 Convolutional encoder 19 3.7.5 Mapping on a Burst . 19 3.7.4 Interleaving . 19 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4 Control Channels 19 Slow associated control channel (SACCH) . 19 4.1.1 Block constitution 19 4.1.2 Block code 19 4.1.3
13、 Convolutional encoder 20 4.1.4 Interleaving . 20 4.1.5 Mapping on a Burst . 20 Fast associated control channel at full rate (FACCHIF) 20 4.2.1 Block constitution 20 4.2.2 Block code 21 4.2.3 Convolutional encoder 21 4.2.4 Interleaving . 21 4.2.5 Mapping on a Burst . 21 4.3.1 Block constitution 21 4
14、.3.2 Block code 21 4.3.3 Convolutional encoder 21 4.3.4 Interleaving . 22 4.3.5 Mapping on a Burst . 22 Broadcast control, Paging, Access grant, Notification and Cell broadcast channels (BCCH, PCH, AGCH, NCH, CBCH) 22 Stand-alone dedicated control channel (SDCCH) . 23 Random access channel (RACH) .
15、23 Synchronization channel (SCH) 23 Access Burst on channels other than RACH 24 Access Bursts for uplink access on a channel used for VGCS . 24 Fast associated control channel at half rate (FACCHM) 21 Annex A (informative): Summary of Channel Types 36 Annex B (informative): Summary of Polynomials Us
16、ed for Convolutional Codes 37 History . 38 ETSI GSM05.03 9b 3400855 0323749 YTb Page 5 GSM 05.03 version 5.2.0: August 1996 Foreword This Global System for Mobile communications Technical Specification (GTS) has been produced by the Special Mobile Group (SMG) Technical Committee (TC) of the European
17、 Telecommunications Standards Institute (ETSI). This GTS specifies the data blocks given to the encryption unit. It includes the specification of encoding, reordering, interleaving and the stealing flag within the digital cellular telecommunications system (Phase 2/Phase 2+). This GTS is a TC-SMG ap
18、proved GSM technical specification version 5, which contains GSM Phase 2+ enhancementsfeatures to the version 4 GSM technical specification. The ETS from which this Phase 2+ GTS has evolved is Phase 2 GSM ETS 300 575 edition 2 with Amendment 1 (GSM 05.03 version 4.3.0). GTS are produced by TC-SMG to
19、 enable the GSM Phase 2+ specifications to become publicly available, prior to submission for the formal ETSI standards approval procedure to become European Telecommunications Standards (ETS). This ensures the earliest possible access to GSM Phase 2+ specifications for ali Manufacturers, Network op
20、erators and implementors of the Global System for Mobile communications. The contents of this GTS are subject to continuing work within 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
21、 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, upd
22、ates, 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 ETSI rules. Reference is made within this GTS to GSM-TSs (note). NOTE: TC-SMG has produced documents which give
23、the technical specifications for the implementation of the digital cellular telecommunications system. Historically, these documents have been identified as GSM Technical Specifications (GSM-TSs). These TSs may have subsequently become I-ETSs (Phase l), or ETSs/ETSI Technical Reports (ETRs) (Phase 2
24、). TC-SMG has also produced ETSI GSM TSs which give the technical specifications for the implementation of Phase 2+ enhancements of the digital cellular telecommunications system, These version 5.x.x GSM Technical Specifications may be referred to as GTSs. ETSI GSMQ5=03 96 3400855 0323750 118 Page 6
25、 GSM 05.03 version 5.2.0: August 1996 Blank page - ETSI GSM05-U3 96 W 3480855 0223751 054 Page 7 GSM 05.03 version 5.2.0: August 1996 1 Scope A reference configuration of the transmission chain is shown in GSM 05.01. According to this reference configuration, this technical specification specifies t
26、he data blocks given to the encryption unit. It includes the specification of encoding, reordering, interleaving and the stealing flag. It does not specify the channel decoding method. The definition is given for each kind of logical channel, starting from the data provided to the channel encoder by
27、 the speech coder, the data terminal equipment, or the controller of the MS or 6s. The definitions of the logical channel types used in this technical specification are given in GSM 05.02, a summary is in annex 1. 1.1 Normative references This ETS incorporates by dated and undated reference, provisi
28、ons 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 ETS only when incorporated in it by amendment or r
29、evision. For undated references, the latest edition of the publication referred to applies. i31 i41 i51 PI 91 I .2 Abbreviations GSM O1 .O4 (ETR 100): “Digital cellular telecommunication system (Phase 2); Abbreviations and acronyms“. GSM 04.08 (ETS 300 557): “Digital cellular telecommunication syste
30、m (Phase 2); Mobile radio interface layer 3 specification“. GSM 04.21 (ETS 300 562): “Digital cellular telecommunication system (Phase 2); Rate adaption on the Mobile Station - Base Station System (MS - BSS) interface“. GSM 05.01 (ETS 300 573): “Digital cellular telecommunication system (Phase 2); P
31、hysical layer on the radio path General description“. GSM 05.02 (ETS 300 574): “Digital cellular telecommunication system (Phase 2); Multiplexing and multiple access on the radio path“. GSM 05.05: (ETC 300 577): “Digital cellular telecommunication system (Phase 2); Radio Transmission and Reception“.
32、 GSM 06.1 O (ETS 300 580-2): “Digital cellular telecommunication system (Phase 2); Full rate speech transcoding“. GSM 06.20 (ETS 300 581 -2): “Digital cellular telecommunication system; Half rate speech Part 2: Half rate speech transcoding“. GSM 06.60 (Draft prETS 300 726) : “Digital cellular teleco
33、mmunication system ; Enhanced Full Rate (EFR) speech transcoding“. Abbreviations used in this specification are listed in GSM 01.04. ETSI GSM05.03 96 = 3400855 0123752 T90 Page 8 GSM 05.03 version 5.2.0: August 1996 2 General 2.1 General organization Each channel has its own coding and interleaving
34、scheme. However, the channel coding and interleaving is organized in such a way as to allow, as much as possible, a unified decoder structure. Each channel uses the following sequence and order of operations: - The information bits are coded with a systematic block code, building words of informatio
35、n + parity bits. - These information + parity bits are encoded with a convolutional code, building the coded bits. - Reordering and interleaving the coded bits, and adding a stealing flag, gives the interleaved bits. All these operations are made block by block, the size of which depends on the chan
36、nel. However, most of the channels use a block of 456 coded bits which is interleaved and mapped onto bursts in a very similar way for all of them. Figure 1 gives a diagram showing the general structure of the channel coding. This block of 456 coded bits is the basic structure of the channel coding
37、scheme. In the case of full rate speech TCH, this block carries the information of one speech frame. In case of control channels, it carries one message. In the case of half rate speech TCH, the information of one speech frame is carried in a block of 228 coded bits. In the case of the Enhanced full
38、 rate speech the information bits coming out of the source codec first go though a preliminary channel coding. then the channel coding as described above takes place. In the case of FACCH, a coded message block of 456 bits is divided into eight sub-blocks. The first four sub-blocks are sent by steal
39、ing the even numbered bits of four timeslots in consecutive frames used for the TCH. The other four sub-blocks are sent by stealing the odd numbered bits of the relevant timeslot in four consecutive used frames delayed 2 or 4 frames relative to the first frame. Along with each block of 456 coded bit
40、s there is, in addition, a stealing flag (8 bits), indicating whether the block belongs to the TCH or to the FACCH. In the case of SACCH, BCCH or CCCH, this stealing flag is dummy. Some cases do not fit in the general organization, and use short blocks of coded bits which are sent completely in one
41、timeslot. They are the random access messages of the RACH on uplink and the synchronization information broadcast of the SCH on downlink. ET O TCHIHS SI GSM05.03 9b H 3400855 0323753 927 Page 9 GSM 05.03 version 5.2.0: August 1996 TCHIFS SACCH, FACCH, TCHIEFS (Enhanced full rate speech TCH) speech f
42、rame speech frame message data frame message 112 bits 260 bits 184 bits NO bits PO bits 3.2 3.1 4.1.1 3.n.l 4.6,4.7 I rprrchhime I j interface I I I 1 Cyclic code Cyclic code + tail t tail in: 112 bits in: 260 bits out: 121 bits out: 267 bits 3.2.1 3.1.2.1 interface II I I - r cyclic code + tail +ta
43、il out: 228 bits 3,n.2 out: P1 bits Fire code +tail in: NO bits 4.1.2 4.6,4.7 in: 184 bits out: NI bits in: PO bits Figure 1 : Channel Coding and Interleaving Organization convolutional code k=7, 2 classes in: 121 bits Out: 228 bits 3.2.2 In each box, the last line indicates the chapter defining the
44、 function. In the case of RACH, P0=8 and P1=18; in the case of SCH, P0=25 and P1=39. In the case of data TCHs, NO, N1 and n depend on the type of data TCH. Interfaces: 1) information bits (d) 2) 3) coded bits (c) 4) interleaved bits (e) information + parity + tail bits (u) convolutional convoiutiona
45、i convolutional convoiutionai code code code code k=5,2 Classes k=5, rate 112 k=5, rate r k=5, rate 112 in: 267 bib in: 228 bits in: Ni bits in: pi bits out: 456 bits out: 456 bits out: 456 bits out: 2P bits 3.1.2.2 4.1.3 3.n.3 4.6,4.7 interface 3 I II I 1 TCHIF2.4 others reordering and partitioning
46、 +stealing flag in: 228 bits out: 4 blocks 3.2.3 reordering and partitioning +stealing flag out: 8 blocks 3.1.3,4.1 A, 4.3.4 in: 456 bits diagonal interleaving + stealing flags in: 456 bits I TCHIFSl FACCH TCHIF2.4 TCHIEFS out: 4 blocks to depth 19, starting Others diagonally interleaved block diago
47、nal block diagonal block rectangular interleaving interleaving interleaving in: 8 blocks in: 4 blocks out: pairs of out: pairs of out: pairs of blocks blocks blocks in: 8 blocks 3.2.3 3.1.3, 4.3.4 4.1.4 on consecutive bursts 3.n.4 I_-.- _ ._ interface 4 -_ encryplion unit _ ETSI GSM05.03 96 3400855
48、0323754 8b3 Page 10 GSM 05.03 version 5.2.0: August 1996 2.2 Naming Convention For ease of understanding a n.aming convention for bits is given for use throughout the technical specification: - General naming: “k“ and “j“ for numbering of bits in data blocks and bursts. KXu gives the amount of bits
49、in one block, where “x“ refers to the data type “nu is used for numbering of delivered data blocks where “Nu marks a certain data block “Bu is used for numbering of bursts or blocks where “BO“ marks the first burst or block carrying bits from the data block with n = O (first data block in the transmission) - Data delivered to the preliminary channel encoding unit (for EFR only): s(k) for k=l ., Ks - Data delivered by the preliminaty channel encoding unit (for EFR only) before bits rearrangement w(k) for k=l ., Kw - Data delivered to
