SIST EN 300 909 V7.3.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Channel coding (GSM 05.03 version 7.3.1 Release 1998)
General Information
- Abstract
CRs SMG#30, 31
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
- Mandate
- T-172-1
Overview
SIST EN 300 909 V7.3.1:2003 is a Slovenian standard that aligns with the European Standard EN 300 909, focused on the Digital Cellular Telecommunications System (Phase 2+) (GSM) and specifically addresses Channel Coding (GSM 05.03 version 7.3.1 Release 1998). Developed within the framework of the GSM standardization activities by the European Telecommunications Standards Institute (ETSI), this standard details the channel coding mechanisms used in the GSM radio interface for improving the reliability of communication.
Channel coding plays a crucial role in protecting data transmitted over mobile networks from errors caused by interference and signal degradation. This standard defines how information is prepared before it is sent over the air to maximize its integrity and security using established GSM methodologies.
Key Topics
- Logical Channel Coding: Defines specific coding schemes for all logical channels (traffic and control) in GSM Phase 2+, ensuring the optimal transmission of various data types.
- Encoding and Error Protection: Describes systematic block codes and convolutional coding, which encode user data with redundancy to allow error detection and correction at the receiver.
- Interleaving Techniques: Outlines how data bits are distributed (interleaved) across multiple bursts to minimize error impact and improve transmission robustness.
- Stealing Flags: Specifies the use of specially coded bits that help identify and distinguish information types (for example, traffic channel vs. fast associated control channel data).
- Data Block Structures: Gives details on the structure and size of data blocks for full-rate and half-rate speech, control, and data channels.
- Packet-Switched Channel Coding: Covers channel coding for packet-switched data services such as those used in GPRS (General Packet Radio Service).
Applications
This standard is fundamental for organizations involved in:
- Mobile Network Equipment Manufacturing: Ensuring compatibility of mobile stations (MS) and base transceiver stations (BTS) with GSM channel coding requirements.
- Wireless Communication Service Provision: Maintaining high-quality voice and data services through reliable error correction and robust channel coding procedures.
- Testing and Certification: Serving as a reference for regulatory and interoperability tests of GSM networks and devices.
- Research and Development: Providing technical reference for R&D in enhancing GSM technologies and pursuing further optimizations in digital mobile communications.
- Implementation of Packet and Circuit Switched Services: Supporting both legacy GSM voice and new data-oriented services, such as GPRS, by defining applicable coding strategies.
Related Standards
Understanding SIST EN 300 909 V7.3.1:2003 is enhanced by referencing the following GSM specifications and related international standards:
- GSM 05.01: Physical layer on the radio path - general description
- GSM 05.02: Multiplexing and multiple access on the radio path
- GSM 05.05: Radio transmission and reception
- GSM 05.09: Link adaptation
- GSM 06.10/06.20/06.60/06.90: Speech transcoding standards for full rate, half rate, enhanced full rate, and adaptive multi-rate channels
- GSM 04.08: Mobile radio interface Layer 3 specification
- GSM 03.64: GPRS radio interface overall description
For further information and the latest status updates, consult official ETSI and SIST resources.
Keywords: GSM channel coding, digital cellular telecommunications, GSM Phase 2+, mobile communication standards, block and convolutional coding, interleaving, error correction, wireless networks, ETSI standards, data integrity, SIST EN 300 909.
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Frequently Asked Questions
SIST EN 300 909 V7.3.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); Channel coding (GSM 05.03 version 7.3.1 Release 1998)". This standard covers: CRs SMG#30, 31
CRs SMG#30, 31
SIST EN 300 909 V7.3.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.50 - Global System for Mobile Communication (GSM). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 909 V7.3.1:2003 is associated with the following European legislation: Standardization Mandates: T-172-1. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 300 909 V7.3.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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 7.3.1 Release 1998)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 7.3.1SIST EN 300 909 V7.3.1:2003en01-december-2003SIST EN 300 909 V7.3.1:2003SLOVENSKI
STANDARD
ETSIEN300909V7.3.1(2000-09)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);Channelcoding(GSM05.03version7.3.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)2(GSM05.03version7.3.1Release1998)ReferenceREN/SMG-020503Q7R1KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)3(GSM05.03version7.3.1Release1998)ContentsIntellectualPropertyRights.7Foreword.71Scope.81.1References.81.2Abbreviations.92General.92.1Generalorganization.92.2NamingConvention.123TrafficChannels(TCH).133.1Speechchannelatfullrate(TCH/FSandTCH/EFS).133.1.1PreliminarychannelcodingforEFRonly.133.1.1.1CRCcalculation.133.1.1.2Repetitionbits.143.1.1.3Correspondencebetweeninputandoutputofpreliminarychannelcoding.143.1.2ChannelcodingforFRandEFR.143.1.2.1Parityandtailingforaspeechframe.143.1.2.2Convolutionalencoder.153.1.3Interleaving.153.1.4MappingonaBurst.153.2Speechchannelathalfrate(TCH/HS).163.2.1Parityandtailingforaspeechframe.163.2.2Convolutionalencoder.163.2.3Interleaving.173.2.4Mappingonaburst.173.3Datachannelatfullrate,12.0kbit/sradiointerfacerate(9.6kbit/sservices(TCH/F9.6)).183.3.1Interfacewithuserunit.183.3.2Blockcode.183.3.3Convolutionalencoder.183.3.4Interleaving.183.3.5MappingonaBurst.193.4Datachannelatfullrate,6.0kbit/sradiointerfacerate(4,8kbit/sservices(TCH/F4.8)).193.4.1Interfacewithuserunit.193.4.2Blockcode.193.4.3Convolutionalencoder.193.4.4Interleaving.193.4.5MappingonaBurst.203.5Datachannelathalfrate,6,0kbit/sradiointerfacerate(4,8kbit/sservices(TCH/H4.8)).203.5.1Interfacewithuserunit.203.5.2Blockcode.203.5.3Convolutionalencoder.203.5.4Interleaving.203.5.5MappingonaBurst.203.6Datachannelatfullrate,3,6kbit/sradiointerfacerate(2,4kbit/sandlessservices(TCH/F2.4)).203.6.1Interfacewithuserunit.203.6.2Blockcode.203.6.3Convolutionalencoder.213.6.4Interleaving.213.6.5MappingonaBurst.213.7Datachannelathalfrate,3,6kbit/sradiointerfacerate(2,4kbit/sandlessservices(TCH/H2.4)).213.7.1Interfacewithuserunit.213.7.2Blockcode.213.7.3Convolutionalencoder.223.7.4Interleaving.223.7.5MappingonaBurst.223.8Datachannelatfullrate,14,5kbit/sradiointerfacerate(14,4kbit/sservices(TCH/F14.4)).22SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)4(GSM05.03version7.3.1Release1998)3.8.1Interfacewithuserunit.223.8.2Blockcode.223.8.3Convolutionalencoder.223.8.4Interleaving.223.8.5MappingonaBurst.233.9Adaptivemultiratespeechchannelatfullrate(TCH/AFS).233.9.1SID_UPDATE.233.9.1.1Codingofin-banddata.233.9.1.2Parityandconvolutionalencodingforthecomfortnoiseparameters.243.9.1.3Identificationmarker.253.9.1.4Interleaving.253.9.1.5MappingonaBurst.253.9.2SID_FIRST.253.9.2.1Codingofin-banddata.253.9.2.2Identificationmarker.253.9.2.3Interleaving.253.9.2.4MappingonaBurst.263.9.3ONSET.263.9.3.1Codingofin-banddata.263.9.3.2Interleaving.263.9.3.3MappingonaBurst.263.9.4SPEECH.263.9.4.1Codingofthein-banddata.273.9.4.2Orderingaccordingtosubjectiveimportance.273.9.4.3Parityforspeechframes.283.9.4.4Convolutionalencoder.293.9.4.5Interleaving.363.9.4.6MappingonaBurst.363.9.5RATSCCH.363.9.5.1Codingofin-banddata.363.9.5.2ParityandconvolutionalencodingfortheRATSCCHmessage.363.9.5.3Identificationmarker.373.9.5.4Interleaving.373.9.5.5MappingonaBurst.373.10Adaptivemultiratespeechchannelathalfrate(TCH/AHS).373.10.1SID_UPDATE.383.10.1.1Codingofin-banddata.383.10.1.2Parityandconvolutionalencodingforthecomfortnoiseparameters.383.10.1.3Identificationmarker.393.10.1.4Interleaving.393.10.1.5MappingonaBurst.393.10.2SID_UPDATE_INH.403.10.2.1Codingofin-banddata.403.10.2.2Identificationmarker.403.10.2.3Interleaving.403.10.2.4MappingonaBurst.403.10.3SID_FIRST_P1.413.10.3.1Codingofin-banddata.413.10.3.2Identificationmarker.413.10.3.3Interleaving.413.10.3.4MappingonaBurst.413.10.4SID_FIRST_P2.413.10.4.1Codingofin-banddata.413.10.4.2Interleaving.413.10.4.3MappingonaBurst.423.10.5SID_FIRST_INH.423.10.5.1Codingofin-banddata.423.10.5.2Identificationmarker.423.10.5.3Interleaving.423.10.5.4MappingonaBurst.423.10.6ONSET.423.10.6.1Codingofin-banddata.42SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)5(GSM05.03version7.3.1Release1998)3.10.6.2Interleaving.423.10.6.3MappingonaBurst.433.10.7SPEECH.433.10.7.1Codingofthein-banddata.433.10.7.2Orderingaccordingtosubjectiveimportance.433.10.7.3Parityforspeechframes.443.10.7.4Convolutionalencoder.453.10.7.5Interleaving.493.10.7.6MappingonaBurst.493.10.8RATSCCH_MARKER.493.10.8.1Codingofin-banddata.503.10.8.2Identificationmarker.503.10.8.3Interleaving.503.10.8.4MappingonaBurst.503.10.9RATSCCH_DATA.503.10.9.1Codingofin-banddata.503.10.9.2ParityandconvolutionalencodingfortheRATSCCHmessage.503.10.9.3Interleaving.513.10.9.4MappingonaBurst.514ControlChannels.514.1Slowassociatedcontrolchannel(SACCH).514.1.1Blockconstitution.514.1.2Blockcode.514.1.3Convolutionalencoder.524.1.4Interleaving.524.1.5MappingonaBurst.524.2Fastassociatedcontrolchannelatfullrate(FACCH/F).534.2.1Blockconstitution.534.2.2Blockcode.534.2.3Convolutionalencoder.534.2.4Interleaving.534.2.5MappingonaBurst.534.3Fastassociatedcontrolchannelathalfrate(FACCH/H).544.3.1Blockconstitution.544.3.2Blockcode.544.3.3Convolutionalencoder.544.3.4Interleaving.544.3.5MappingonaBurst.544.4Broadcastcontrol,Paging,Accessgrant,NotificationandCellbroadcastchannels(BCCH,PCH,AGCH,NCH,CBCH),CTSPagingandAccessgrantchannels(CTSPCH,CTSAGCH).554.5Stand-alonededicatedcontrolchannel(SDCCH).554.6Randomaccesschannel(RACH).554.7Synchronizationchannel(SCH),CTSBeaconandAccessrequestchannels(CTSBCH-SB,CTSARCH).564.8AccessBurstoncircuitswitchedchannelsotherthanRACH.564.9AccessBurstsforuplinkaccessonachannelusedforVGCS.565PacketSwitchedChannels.575.1Packetdatatrafficchannel(PDTCH).575.1.1Packetdatablocktype1(CS-1).575.1.2Packetdatablocktype2(CS-2).575.1.2.1Blockconstitution.575.1.2.2Blockcode.575.1.2.3Convolutionalencoder.585.1.2.4Interleaving.585.1.2.5Mappingonaburst.585.1.3Packetdatablocktype3(CS-3).585.1.3.1Blockconstitution.585.1.3.2Blockcode.585.1.3.3Convolutionalencoder.595.1.3.4Interleaving.595.1.3.5Mappingonaburst.59SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)6(GSM05.03version7.3.1Release1998)5.1.4Packetdatablocktype4(CS-4).595.1.4.1Blockconstitution.595.1.4.2Blockcode.605.1.4.3Convolutionalencoder.605.1.4.4Interleaving.605.1.4.5Mappingonaburst.605.2Packetcontrolchannels(PACCH,PBCCH,PAGCH,PPCH,PNCH,PTCCH).605.3Packetrandomaccesschannel(PRACH).615.3.1PacketAccessBurst.615.3.2ExtendedPacketAccessBurst.615.4AccessBurstonpacketswitchedchannelsotherthanPRACH.61AnnexA(informative):SummaryofChannelTypes.75AnnexB(informative):SummaryofPolynomialsUsedforConvolutionalCodes.77AnnexC(informative):Changecontrolhistory.78History.79SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)7(GSM05.03version7.3.1Release1998)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeSpecialMobileGroup(SMG).Thepresentdocumentspecifiesthedatablocksgiventotheencryptionunit.Itincludesthespecificationofencoding,ThecontentsofthepresentdocumentmaybesubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillthenbere-submittedforformalapprovalproceduresbyETSIwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7GSMPhase2+Release1998.xtheseconddigitisincrementedforchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.;ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthepresentdocument:25August2000Dateoflatestannouncementofthepresentdocument(doa):30November2000DateoflatestpublicationofnewNationalStandardorendorsementofthepresentdocument(dop/e):31May2001DateofwithdrawalofanyconflictingNationalStandard(dow):31May2001SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)8(GSM05.03version7.3.1Release1998)1ScopeAreferenceconfigurationofthetransmissionchainisshowninGSM05.01[4].Accordingtothisreferenceconfiguration,thepresentdocumentspecifiesthedatablocksgiventotheencryptionunit.Itincludesthespecificationofencoding,reordering,interleavingandthestealingflag.Itdoesnotspecifythechanneldecodingmethod.Thedefinitionisgivenforeachkindoflogicalchannel,startingfromthedataprovidedtothechannelencoderbythespeechcoder,thedataterminalequipment,orthecontrolleroftheMobileStation(MS)orBaseTransceiverStation(BTS).ThedefinitionsofthelogicalchanneltypesusedinthistechnicalspecificationaregiveninGSM05.02[5],asummaryisinannexA.1.1ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.• ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationssystem(Phase2+);Abbreviationsandacronyms".[2]GSM04.08:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacelayer3specification".[3]GSM04.21:"Digitalcellulartelecommunicationssystem(Phase2+);RateadaptionontheMobileStation-BaseStationSystem(MS-BSS)interface".[4]GSM05.01:"Digitalcellulartelecommunicationssystem(Phase2+);PhysicallayerontheradiopathGeneraldescription".[5]GSM05.02:"Digitalcellulartelecommunicationssystem(Phase2+);Multiplexingandmultipleaccessontheradiopath".[6]GSM05.05:"Digitalcellulartelecommunicationssystem(Phase2+);RadioTransmissionandReception".[7]GSM05.09:"Digitalcellulartelecommunicationssystem(Phase2+);Linkadaptation".[8]GSM06.10:"Digitalcellulartelecommunicationssystem;Fullratespeechtranscoding".[9]GSM06.20:"Digitalcellulartelecommunicationssystem;Halfratespeechtranscoding".[10]GSM06.60:"Digitalcellulartelecommunicationssystem;EnhancedFullRate(EFR)speechtranscoding".[11]GSM06.90:"Digitalcellulartelecommunicationssystem;AdaptiveMulti-Ratespeechtranscoding".[12]GSM06.93:"Digitalcellulartelecommunicationssystem;Discontinoustransmission(DTX)forAdaptiveMulti-Ratespeechtrafficchannels".SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)9(GSM05.03version7.3.1Release1998)[13]GSM03.64:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);OveralldescriptionoftheGPRSRadioInterface;Stage2".[14]GSM03.52:"Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephonySystem(CTS),Phase1;LowerlayersoftheCTSRadioInterface;Stage2".1.2AbbreviationsAbbreviationsusedinthepresentdocumentarelistedinGSM01.04.2General2.1GeneralorganizationEachchannelhasitsowncodingandinterleavingscheme.However,thechannelcodingandinterleavingisorganizedinsuchawayastoallow,asmuchaspossible,aunifieddecoderstructure.Eachchannelusesthefollowingsequenceandorderofoperations:-theinformationbitsarecodedwithasystematicblockcode,buildingwordsofinformation+paritybits;-theseinformation+paritybitsareencodedwithaconvolutionalcode,buildingthecodedbits;-reorderingandinterleavingthecodedbits,andaddingastealingflag,givestheinterleavedbits.Alltheseoperationsaremadeblockbyblock,thesizeofwhichdependsonthechannel.However,mostofthechannelsuseablockof456codedbitswhichisinterleavedandmappedontoburstsinaverysimilarwayforallofthem.Figures1aand1bgiveadiagramshowingthegeneralstructureofthechannelcoding.Thisblockof456codedbitsisthebasicstructureofthechannelcodingscheme.InthecaseoffullratespeechTCH,thisblockcarriestheinformationofonespeechframe.Incaseofcontrolchannels,itcarriesonemessage.InthecaseofhalfratespeechTCH,theinformationofonespeechframeiscarriedinablockof228codedbits.InthecaseoftheEnhancedfullratespeechtheinformationbitscomingoutofthesourcecodecfirstgothoughapreliminarychannelcoding.thenthechannelcodingasdescribedabovetakesplace.Inthecaseofapacketswitchedchanneltheblockof456codedbitscarriesoneradioblock.InthecaseofFACCH,acodedmessageblockof456bitsisdividedintoeightsub-blocks.Thefirstfoursub-blocksaresentbystealingtheevennumberedbitsoffourtimeslotsinconsecutiveframesusedfortheTCH.Theotherfoursub-blocksaresentbystealingtheoddnumberedbitsoftherelevanttimeslotinfourconsecutiveusedframesdelayed2or4framesrelativetothefirstframe.Alongwitheachblockof456codedbitsthereis,inaddition,astealingflag(8bits),indicatingwhethertheblockbelongstotheTCHortotheFACCH.InthecaseofSACCH,BCCH,CCCHorCTSCCH,thisstealingflagisdummy.Inthecaseofapacketswitchedchannel,thesebitsareusedtoindicatethecodingschemeused.Somecasesdonotfitinthegeneralorganization,anduseshortblocksofcodedbitswhicharesentcompletelyinonetimeslot.Theyaretherandomaccessmessagesof:-theRACH;-orPRACH;onuplinkandthesynchronizationinformationbroadcastoftheSCHondownlink.InCTS,theyaretheaccessrequestmessageoftheCTSARCHonuplinkandtheinformationbroadcastontheCTSBCH-SBondownlink.SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)10(GSM05.03version7.3.1Release1998)speechframe112bits3.2speechframe260bits3.1message184bits4.1.1dataframeN0bits3.n.1messageP0bits4.6,4.7,5.3.2RLCblockQ0bits5.1.n.1speechframe244bits3.1interface1interface2TCH/HS(halfratespeechTCH)TCH/FS(fullratespeechTCH)SACCH,FACCH,BCCH,CBCH,PCHAGCH,SDCCHdataTCHsPRACHRACH,SCHcycliccode+tailin:260bitsout:267bits3.1.1cycliccode+tailin:112bitsout:121bits3.2.1Firecode+tailin:184bitsout:228bits4.1.2+tailin:N0bitsout:N1bits3.n.2cycliccode+tailin:P0bitsout:P1bits4.6,4.7,5.3.2cycliccode+tailin:Q0bitsout:Q1bits5.1.n.2cycliccode+repetitionin:244bitsout:260bits3.1.1interface3interface4TCH/F2.4othersTCH/FS,TCH/EFSTCH/F2.4,FACCHothersencryptionunitdiagonalinterleaving+stealingflagsin:456bitsout:4blocksdiagonallyinterleavedtodepth19,startingonconsecutivebursts3.n.4reorderingandpartitioning+stealingflagin:456bitsout:8blocks3.1.3,4.1.4,4.3.4blockrectangularinterleavingin:8blocksout:pairsofblocks4.1.4blockdiagonalinterleavingin:8blocksout:pairsofblocks3.1.3,4.3.4reorderingandpartitioning+stealingflagin:228bitsout:4blocks3.2.3blockdiagonalinterleavingin:4blocksout:pairsofblocks3.2.3convolutionalcodek=7,2classesin:121bitsout:228bits3.2.2convolutionalcodek=5,2classesin:267bitsout:456bits3.1.2convolutionalcodek=5,rate1/2in:228bitsout:456bits4.1.3convolutionalcodek=5,raterin:N1bitsout:456bits3.n.3convolutionalcodek=5,raterin:P1out:P2bits4.6,4.7,5.3.2convolutionalcodek=5,raterin:Q1bitsout:456bits5.1.n.3PDTCH,PACCH,PBCCH,PAGCH,PPCH,PNCH,PTCCH/Dreorderingandpartitioning+codeidentifierin:456bitsout:8blocks4.1.4interface0TCH/EFS(EnhancedfullratespeechTCH)CS-1othersCS-4othersPTCCH/UCTSAGCH,CTSPCHCTSBCH-SB,CTSARCHFigure1a:ChannelCodingandInterleavingOrganizationIneachbox,thelastlineindicatesthechapterdefiningthefunction.InthecaseofRACH,P0=8andP1=18;inthecaseofSCH,CTSBCH-SBandCTSARCH,P0=25andP1=39.InthecaseofdataTCHs,N0,N1andndependonthetypeofdataTCH.Interfaces:1)informationbits(d);2)information+parity+tailbits(u);3)codedbits(c);4)interleavedbits(e).SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)11(GSM05.03version7.3.1Release1998)TCH/AHSTCH/AFS3.9.4.2cycliccodelin:95.244bits3.9.4.interface3interface4encryptionunitreorderingandpartitioning+stealingflagin:456bitsout:8blocks3.9.4.5->3.1.3blockdiagonalinterleavingin:8blocksout:pairsofblocks3.9.4.5->3.1.3convolutionalcodeK=5or7rate1/5.1/2in:101.250bitsout:448bits3.9.4.4out:101.250Subjectiveorderingout:95.244bitsin:95.244bitsblockcodein:2bitsout:8bits3.9.4.1Speechframe95.244bitsIn-banddata2bits3.9.3.9.3.10.7.2cycliccodein:83.123bits3.10.7.3reorderingandpartitioning+stealingflagin:228bitsout:4blocks3.10.7.5->3.2.3blockdiagonalinterleavingin:4blocksout:pairsofblocks3.10.7.5->3.2.3convolutionalcodeK=5or7rate1/3.1/2in:89.129bitsout:172.2123.10.7.4out:89.129bitsSubjectiveorderingout:95.159bitsin:95.159bitsblockcodein:2bitsout:4bits3.10.7.1Speechframe95.159bitsIn-banddata2bits3.10.73.10.7Class212.36bitsinterface0interface0interface1interface1interface0interface2interface2ididicicFigure1b:ChannelCodingandInterleavingOrganization,adaptivemulti-ratespeechIneachbox,thelastlineindicatesthechapterdefiningthefunction.Interfaces:0)speechbitsfromthespeechencoder(s);1)reorderedspeechbits(d);2)speech+parity+tailbits(u);3)codedbits(c);4)interleavedbits(e).SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)12(GSM05.03version7.3.1Release1998)2.2NamingConventionForeaseofunderstandinganamingconventionforbitsisgivenforusethroughoutthetechnicalspecification:-Generalnaming:"k"and"j"fornumberingofbitsindatablocksandbursts;"Kx"givestheamountofbitsinoneblock,where"x"referstothedatatype;"n"isusedfornumberingofdelivereddatablockswhere;"N"marksacertaindatablock;"B"isusedfornumberingofburstsorblockswhere;"B0"marksthefirstburstorblockcarryingbitsfromthedatablockwithn=0(firstdatablockinthetransmission).-Datadeliveredtothepreliminarychannelencodingunit(forEFRonly):s(k)fork=1.,Ks-Datadeliveredbythepreliminarychannelencodingunit(forEFRonly)beforebitsrearrangementw(k)fork=1.,Kw-Datadeliveredtotheencodingunit(interface1infigure1):d(k)fork=0,1,.,Kd-1-Inputin-banddatabits(forTCH/AMRonly):id(k)fork=0,1-Encodedin-banddatabits(forTCH/AMRonly):ic(k)fork=0,1,.,3TCH/AHSspeechframesork=0,1,.,7TCH/AFSspeechframesork=0,1,.,15TCH/AMR,SIDframes-Codeidentifyingtheusedcodingscheme(forpacketswitchedchannelsonly):q(k)fork=0,1,.,7-Dataafterthefirstencodingstep(blockcode,cycliccode;interface2infigure1):u(k)fork=0,1,.,Ku-1-Dataputintotheshiftregisteroftheconvoutionalcodeandcalculatedfromthedatabitsu(k)andthefeedbackbitsinrecursivesystematicconvolutionalcodesr(k)fork=0,1,.,Kr-1-Dataafterthesecondencodingstep(convolutionalcode;interface3infigure1):c(n,k)orc(k)fork=0,1,.,Kc-1n=0,1,.,N,N+1,.SIST EN 300 909 V7.3.1:2003
ETSIETSIEN300909V7.3.1(2000-09)13(GSM05.03version7.3.1Release1998)-Interleaveddata:i(B,k)fork=0,1,.,Ki-1B=B0,B0+1,.-Bitsinoneburst(interface4infigure1):e(B,k)fork=0,1,.114,115B=B0,B0+1,.3TrafficChannels(TCH)Twokindsoftrafficchannelareconsidered:speechanddata.Bothofthemusethesamegeneralstructure(seefigure1),andinbothcases,apieceofinformationcanbestolenbytheFACCH.3.1Speechchannelatfullrate(TCH/FSandTCH/EFS)Thespeechcoder(whetherFullrateorEnhancedfullrate)deliverstothechannelencoderasequenceofblocksofdata.IncaseofafullrateandenhancedfullratespeechTCH,oneblockofdatacorrespondstoonespeechframe.Forthefullratecodereachblockcontains260informationbits,including182bitsofclass1(protectedbits),and78bitsofclass2(noprotection),(seetable2).ThebitsdeliveredbythespeechcoderarereceivedintheorderindicatedinGSM06.10andhavetoberearrangedaccordingtotable2beforechannelcodingasdefinedinsubclauses3.1.1to3.1.4.Therearrangedbitsarelabelled{d(0),d(1),.,d(259)},definedintheorderofdecreasingimportance.FortheEFRcodereachblockcontains244informationbits.Theblockof244informationbits,labelleds(1).,s(244),passesthroughapreliminarystage,appliedonlytoEFR(seefigure1)whichproduces260bitscorrespondingtothe244inputbitsand16redundancybits.Those16redundancybitscorrespondto8CRCbitsand8repetitionbits,asdescribedinsubclause3.1.1.The260bits,labelledw(1).w(260),havetoberearrangedaccordingtotable7beforetheyaredeliveredtothechannelencodingunitwhichisidenticaltothatoftheTCH/FS.The260bitsblockincludes182bitsofclass1(protectedbits)and78bitsofclass2(noprotection).Theclass1bitsarefurtherdividedintotheclass1aandclass1b,class1abitsbeingprotectedbyacycliccodeandtheconvolutionalcodewhereastheclass1bareprotectedbytheconvolutionalcodeonly.3.1.1PreliminarychannelcodingforEFRonly3.1.1.1CRCcalculationAn8-bitCRCisusedforerror-detection.These8paritybits(bitsw253-w260)aregeneratedbythecyclicgeneratorpolynomial:g(D)=D8+D4+D3+D2+1fromthe65mostimportantbits(50bitsofclass1aand15bitsofclass1b).These65bits(b(1)-b(65))aretakenfromthetable5inthefollowingorder(readrowbyrow,lefttoright):s39s40s41s42s43s44s48s87s45s2s3s8s10s18s19s24s46s47s142s143s
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