ETSI EN 300 909 V6.1.3 (1999-03)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Channel coding (GSM 05.03 version 6.1.2 Release 1997)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 909 Version 6.1.3SIST EN 300 909 V6.1.3:2003en01-december-2003SIST EN 300 909 V6.1.3:2003SLOVENSKI
STANDARD



SIST EN 300 909 V6.1.3:2003



EN 300 909 V6.1.3 (1999-03)European Standard (Telecommunications series)Digital cellular telecommunications system (Phase 2+);Channel coding(GSM 05.03 version 6.1.3 Release 1997)GLOBAL SYSTEM
FOR MOBILE COMMUNICATIONSRSIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)2GSM 05.03 version 6.1.3 Release 1997ReferenceDEN/SMG-020503Q6 (8f0030e0.PDF)KeywordsDigital cellular telecommunications system,Global System for Mobile communications (GSM)ETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88Internetsecretariat@etsi.frIndividual copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: editor@etsi.frCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1999.All rights reserved.SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)3GSM 05.03 version 6.1.3 Release 1997ContentsIntellectual Property Rights.6Foreword.61Scope.71.1Normative references.71.2Abbreviations.72General.82.1General organization.82.2Naming Convention.103Traffic Channels (TCH).103.1Speech channel at full rate (TCH/FS and TCH/EFS).113.1.1Preliminary channel coding for EFR only.113.1.1.1CRC calculation.113.1.1.2Repetition bits.113.1.1.3Correspondence between input and output of preliminary channel coding.123.1.2Channel coding for FR and EFR.123.1.2.1Parity and tailing for a speech frame.123.1.2.2Convolutional encoder.133.1.3Interleaving.133.1.4Mapping on a Burst.133.2Speech channel at half rate (TCH/HS).133.2.1Parity and tailing for a speech frame.143.2.2Convolutional encoder.143.2.3Interleaving.153.2.4Mapping on a burst.153.3Data channel at full rate, 12.0 kbit/s radio interface rate (9.6 kbit/s services (TCH/F9.6)).153.3.1Interface with user unit.153.3.2Block code.163.3.3Convolutional encoder.163.3.4Interleaving.163.3.5Mapping on a Burst.163.4Data channel at full rate, 6.0 kbit/s radio interface rate (4.8 kbit/s services (TCH/F4.8)).163.4.1Interface with user unit.173.4.2Block code.173.4.3Convolutional encoder.173.4.4Interleaving.173.4.5Mapping on a Burst.173.5Data channel at half rate, 6.0 kbit/s radio interface rate (4.8 kbit/s services (TCH/H4.8)).173.5.1Interface with user unit.183.5.2Block code.183.5.3Convolutional encoder.183.5.4Interleaving.183.5.5Mapping on a Burst.183.6Data channel at full rate, 3.6 kbit/s radio interface rate (2.4 kbit/s and less services (TCH/F2.4)).183.6.1Interface with user unit.183.6.2Block code.183.6.3Convolutional encoder.183.6.4Interleaving.193.6.5Mapping on a Burst.193.7Data channel at half rate, 3.6 kbit/s radio interface rate (2.4 kbit/s and less services (TCH/H2.4)).193.7.1Interface with user unit.193.7.2Block code.193.7.3Convolutional encoder.193.7.4Interleaving.193.7.5Mapping on a Burst.19SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)4GSM 05.03 version 6.1.3 Release 19973.8Data channel at full rate, 14.5 kbit/s radio interface rate (14.4 kbit/s services (TCH/F14.4)).203.8.1Interface with user unit.203.8.2Block code.203.8.3Convolutional encoder.203.8.4Interleaving.203.8.5Mapping on a Burst.204Control Channels.214.1Slow associated control channel (SACCH).214.1.1Block constitution.214.1.2Block code.214.1.3Convolutional encoder.214.1.4Interleaving.224.1.5Mapping on a Burst.224.2Fast associated control channel at full rate (FACCH/F).224.2.1Block constitution.224.2.2Block code.224.2.3Convolutional encoder.224.2.4Interleaving.224.2.5Mapping on a Burst.224.3Fast associated control channel at half rate (FACCH/H).234.3.1Block constitution.234.3.2Block code.234.3.3Convolutional encoder.234.3.4Interleaving.234.3.5Mapping on a Burst.244.4Broadcast control, Paging, Access grant, Notification and Cell broadcast channels (BCCH, PCH,AGCH, NCH, CBCH).244.5Stand-alone dedicated control channel (SDCCH).244.6Random access channel (RACH).254.7Synchronization channel (SCH).254.8Access Burst on circuit switched channels other than RACH.264.9Access Bursts for uplink access on a channel used for VGCS.265Packet Switched Channels.265.1Packet data traffic channel (PDTCH).265.1.1Packet data block type 1 (CS-1).265.1.2Packet data block type 2 (CS-2).265.1.2.1Block constitution.265.1.2.2Block code.265.1.2.3Convolutional encoder.275.1.2.4Interleaving.275.1.2.5Mapping on a burst.275.1.3Packet data block type 3 (CS-3).285.1.3.1Block constitution.285.1.3.2Block code.285.1.3.3Convolutional encoder.285.1.3.4Interleaving.295.1.3.5Mapping on a burst.295.1.4Packet data block type 4 (CS-4).295.1.4.1Block constitution.295.1.4.2Block code.295.1.4.3Convolutional encoder.295.1.4.4Interleaving.305.1.4.5Mapping on a burst.305.2Packet control channels (PACCH, PBCCH, PAGCH, PPCH, PNCH, PTCCH).305.3Packet random access channel (PRACH).305.3.1Packet Access Burst.305.3.2Extended Packet Access Burst.305.4Access Burst on packet switched channels other than PRACH.31SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)5GSM 05.03 version 6.1.3 Release 1997Annex A (informative):Summary of Channel Types.43Annex B (informative):Summary of Polynomials Used for Convolutional Codes.44Annex C (informative):Change control history.45History.46SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)6GSM 05.03 version 6.1.3 Release 1997Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Special Mobile Group (SMG).This EN 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+).The contents of this EN are subject to continuing work within SMG and may change following formal SMG approval.Should SMG modify the contents of this EN it will then be republished by ETSI with an identifying change of releasedate and an increase in version number as follows:Version 6.x.ywhere:6indicates release 1997 of GSM Phase 2+xthe second digit is incremented for changes of substance, i.e. technical enhancements, corrections, updates,etcythe third digit is incremented when editorial only changes have been incorporated in the specification.National transposition datesDate of adoption of this EN:12 March 1999Date of latest announcement of this EN (doa):30 June 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 December 1999Date of withdrawal of any conflicting National Standard (dow):31 December 1999SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)7GSM 05.03 version 6.1.3 Release 19971ScopeA reference configuration of the transmission chain is shown in GSM 05.01 [4]. According to this referenceconfiguration, this EN specifies the data blocks given to the encryption unit.It includes the specification of encoding, reordering, interleaving and the stealing flag. It does not specify the channeldecoding method.The definition is given for each kind of logical channel, starting from the data provided to the channel encoder by thespeech coder, the data terminal equipment, or the controller of the Mobile Station (MS) or Base Transceiver Station(BTS). The definitions of the logical channel types used in this technical specification are given in GSM 05.02 [5], asummary is in annex A.1.1Normative referencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.-References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.-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 samenumber.[1]GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations andacronyms".[2]GSM 04.08: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer3 specification".[3]GSM 04.21: "Digital cellular telecommunications system (Phase 2+); Rate adaption on the MobileStation - Base Station System (MS - BSS) interface".[4]GSM 05.01: "Digital cellular telecommunications system (Phase 2+); Physical layer on the radiopath General description".[5]GSM 05.02: "Digital cellular telecommunications system (Phase 2+); Multiplexing and multipleaccess on the radio path".[6]GSM 05.05: "Digital cellular telecommunications system (Phase 2+); Radio Transmission andReception".[7]GSM 06.10: "Digital cellular telecommunications system; Full rate speech transcoding".[8]GSM 06.20: "Digital cellular telecommunications system; Half rate speech transcoding".[9]GSM 06.60: "Digital cellular telecommunications system; Enhanced Full Rate (EFR) speechtranscoding".[10]GSM 03.64: "Digital cellular telecommunications system (Phase 2+); General Packet RadioService (GPRS); Overall description of the GPRS Radio Interface; Stage 2".1.2AbbreviationsAbbreviations used in this EN are listed in GSM 01.04.SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)8GSM 05.03 version 6.1.3 Release 19972General2.1General organizationEach channel has its own coding and interleaving scheme. However, the channel coding and interleaving is organized insuch 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 information + 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 channel. However, most of the channelsuse a block of 456 coded bits which is interleaved and mapped onto bursts in a very similar way for all of them. Figure 1gives a diagram showing the general structure of the channel coding.This block of 456 coded bits is the basic structure of the channel coding 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 rate speech the information bits coming out of the source codec first go though apreliminary channel coding. then the channel coding as described above takes place.In the case of a packet switched channel the block of 456 coded bits carries one radio block.In the case of FACCH, a coded message block of 456 bits is divided into eight sub-blocks. The first four sub-blocks aresent by stealing the even numbered bits of four timeslots in consecutive frames used for the TCH. The other foursub-blocks are sent by stealing the odd numbered bits of the relevant timeslot in four consecutive used frames delayed 2or 4 frames relative to the first frame. Along with each block of 456 coded bits there is, in addition, a stealing flag (8bits), indicating whether the block belongs to the TCH or to the FACCH. In the case of SACCH, BCCH or CCCH, thisstealing flag is dummy. In the case of a packet switched channel, these bits are used to indicate the coding scheme used.Some cases do not fit in the general organization, and use short blocks of coded bits which are sent completely in onetimeslot. They are the random access messages of-the RACH-or PRACHon uplink and the synchronization information broadcast of the SCH on downlink.SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)9GSM 05.03 version 6.1.3 Release 1997speech frame112 bits3.2speech frame260 bits3.1message184 bits4.1.1data frameN0 bits3.n.1messageP0 bits4.6, 4.7, 5.3.2RLC blockQ0 bits5.1.n.1speech frame244 bits3.1interface1interface2TCH/HS(half ratespeech TCH)TCH/FS(full ratespeech TCH)SACCH, FACCH,BCCH, CBCH, PCHAGCH, SDCCHdata TCHsPRACHRACH,SCHcyclic code+ tailin: 260 bitsout: 267 bits3.1.1cyclic code+ tailin: 112 bitsout: 121 bits3.2.1Fire code+tailin: 184 bitsout: 228 bits4.1.2+tailin: N0 bitsout: N1 bits3.n.2cyclic code+ tailin: P0 bitsout: P1 bits4.6, 4.7, 5.3.2cyclic code+ tailin: Q0 bitsout: Q1 bits5.1.n.2cyclic code+ repetitionin: 244 bitsout: 260 bits3.1.1interface3interface4TCH/F2.4othersTCH/FS, TCH/EFSTCH/F2.4, FACCHothersencryption unitdiagonal interleaving+ stealing flagsin: 456 bitsout: 4 blocksdiagonally interleavedto depth 19, startingon consecutive bursts3.n.4reordering and partitioning+stealing flagin: 456 bitsout: 8 blocks3.1.3, 4.1.4, 4.3.4block rectangularinterleavingin: 8 blocksout: pairs ofblocks4.1.4block diagonalinterleavingin: 8 blocksout: pairs ofblocks3.1.3, 4.3.4reordering and partitioning+stealing flagin: 228 bitsout: 4 blocks3.2.3block diagonalinterleavingin: 4 blocksout: pairs ofblocks3.2.3convolutionalcodek=7, 2 classesin: 121 bitsout: 228 bits3.2.2convolutionalcodek=5, 2 classesin: 267 bitsout: 456 bits3.1.2convolutionalcodek=5, rate 1/2in: 228 bitsout: 456 bits4.1.3convolutionalcodek=5, rate rin: N1 bitsout: 456 bits3.n.3convolutionalcodek=5, rate rin: P1 bitsout: P2 bits4.6, 4.7, 5.3.2convolutionalcodek=5, rate rin: Q1 bitsout: 456 bits5.1.n.3PDTCH, PACCH,PBCCH, PAGCH, PPCH, PNCH, PTCCH/Dreordering and partitioning+code identifierin: 456 bitsout: 8 blocks4.1.4interface0TCH/EFS(Enhanced full ratespeech TCH)CS-1othersCS-4othersPTCCH/UFigure 1: Channel Coding and Interleaving OrganizationIn each box, the last line indicates the chapter defining the function. In the case of RACH, P0 = 8 and P1 = 18; inthe case of SCH, P0 = 25 and P1 = 39. In the case of data TCHs, N0, N1 and n depend on the type of data TCH.Interfaces:1)information bits (d);2)information + parity + tail bits (u);3)coded bits (c);4)interleaved bits (e).SIST EN 300 909 V6.1.3:2003



ETSIEN 300 909 V6.1.3 (1999-03)10GSM 05.03 version 6.1.3 Release 19972.2Naming ConventionFor ease of understanding a naming 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;"Kx" gives the amount of bits in one block, where "x" refers to the data type;"n" is used for numbering of delivered data blocks where;"N" marks a certain data block;"B" is used for numbering of bursts or blocks where;"B0" marks the first burst or block carrying bits from the data block with n = 0 (first data block in thetransmission).-Data delivered to the preliminary channel encoding unit (for EFR only):s(k) for k = 1., Ks-Data delivered by the preliminary channel encoding unit (for EFR only) before bits rearrangementw(k) for k = 1., Kw-Data delivered to the encoding unit (interface 1 i
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