SIST EN 300 908 V7.5.1:2003

• Abstract:

  05.02; s31b; CR: A146; R98; 7.4.0; 7.5.0; Clarification of PBCCH message scheduling 05.02; s31b; CR: A156; R98; 7.4.0; 7.5.0; FCCH decoding problem for multislot MS

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 908 V7.5.1 (2000-10) - Digital cellular telecommunications system (Phase 2+) (GSM); Multiplexing and multiple access on the radio path (GSM 05.02 version 7.5.1 Release 1998)

Overview

SIST EN 300 908 V7.5.1:2003 defines the multiplexing and multiple access methods for the radio path in the digital cellular telecommunications system (GSM Phase 2+), focusing on the structure and operation of physical and logical channels. This standard plays a central role in how Global System for Mobile Communication (GSM) networks manage radio resources to ensure efficient signal transmission and reliable user connectivity.

By detailing how logical channels are mapped onto physical radio resources through techniques like frequency hopping and Time Division Multiple Access (TDMA), this document is foundational for GSM networks operating in the 900 MHz and 1800 MHz bands. It covers channel definitions, channel mapping, and addresses issues like efficient message scheduling and multislot mobile station configurations.

Key Topics

• Multiplexing and Multiple Access: The standard explains how multiple users and services share the radio path efficiently, utilizing TDMA frames and frequency allocation mechanisms to enable high network capacity and minimal interference.
• Logical and Physical Channels: Detailed descriptions distinguish between traffic channels and control channels, explaining the purpose and operation of each, including broadcast, common, dedicated, packet, and cordless telephony system (CTS) control channels.
• TDMA and Frequency Hopping: The structure and timing of timeslots, TDMA frame numbers, and the use of frequency hopping are defined to optimize spectrum usage and support robust communications.
• Channel Mapping: Guidance is provided on how logical channels (e.g., traffic, signalling, broadcast) map onto physical channels, ensuring reliable and synchronized radio service delivery.
• Multislot Operation: The standard specifies how multiple slots can be assigned to a single mobile station to enable high data rate services, an important feature for both voice and packet data transmission.
• Control Channel Scheduling: Clear procedural clarifications are provided on message scheduling (such as for PBCCH, the Packet Broadcast Control Channel) and addressing FCCH (Frequency Correction Channel) decoding issues for multislot mobile stations.

Applications

SIST EN 300 908 V7.5.1:2003 is vital for a range of GSM network deployment and maintenance activities:

• Network Design and Optimization: Engineers use this standard to develop efficient channel structures and allocate radio resources in base stations and mobile devices.
• Mobile Device Development: Manufacturers reference these channel specifications to ensure handsets and modems are compatible with GSM networks worldwide.
• Interoperability Assurance: Compliance with this standard is essential for seamless roaming and service consistency across different network vendors and operators.
• Upgrading Systems: When transitioning networks to new GSM releases or adding features like GPRS and CTS, the standard helps ensure proper channel mapping and operation.
• Troubleshooting and Quality Assurance: Technicians rely on the channel and multiplexing framework to identify and resolve radio access issues affecting service quality.

Related Standards

The following standards are closely connected with the scope of SIST EN 300 908 V7.5.1:2003 and provide further detail on GSM system operation:

• GSM 05.03: Channel coding specifications for enhanced data integrity.
• GSM 05.04: Modulation methods used for signal transmission.
• GSM 05.05: Radio transmission and reception, including frequency planning.
• GSM 05.08: Radio subsystem link control for maintaining call quality.
• GSM 05.10: Synchronization procedures for the radio subsystem.
• GSM 04.08: Mobile radio interface layer 3 specification for signaling protocols.
• GSM 03.03: Numbering, addressing, and identification principles.
• GSM 04.06, 04.60: Data link and radio link control protocols for both circuit- and packet-switched operations.
• GSM 01.04: Abbreviations and acronyms for consistency across documentation.

Implementing SIST EN 300 908 V7.5.1:2003 is key to standardized, efficient, and interoperable GSM mobile communication systems, providing a reliable framework for both network operators and equipment manufacturers.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Multiplexing and multiple access on the radio path (GSM 05.02 version 7.5.1 Release 1998)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 908 Version 7.5.1SIST EN 300 908 V7.5.1:2003en01-december-2003SIST EN 300 908 V7.5.1:2003SLOVENSKI
STANDARD
ETSIEN300908V7.5.1(2000-10)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);Multiplexingandmultipleaccessontheradiopath(GSM05.02version7.5.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)2(GSM05.02version7.5.1Release1998)ReferenceREN/SMG-020502Q7R2KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°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:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)3(GSM05.02version7.5.1Release1998)ContentsIntellectualPropertyRights.6Foreword.61Scope.71.1References.71.2Abbreviations.82General.83Logicalchannels.83.1General.83.2Trafficchannels.83.2.1General.83.2.2Speechtrafficchannels.93.2.3Circuitswitcheddatatrafficchannels.93.2.4Packetdatatrafficchannels(PDTCH).93.3Controlchannels.93.3.1General.93.3.2Broadcastchannels.93.3.2.1Frequencycorrectionchannel(FCCH).93.3.2.2Synchronizationchannel(SCH).103.3.2.3Broadcastcontrolchannel(BCCH).103.3.2.4PacketBroadcastControlChannel(PBCCH).113.3.3Commoncontroltypechannels.113.3.3.1Commoncontroltypechannels,knownwhencombinedasacommoncontrolchannel(CCCH).113.3.3.2PacketCommoncontrolchannels(PCCCH).113.3.4Dedicatedcontrolchannels.113.3.4.1Circuitswitcheddedicatedcontrolchannels.113.3.4.2Packetdedicatedcontrolchannels.123.3.5CellBroadcastChannel(CBCH).123.3.6CTScontrolchannels.123.3.6.1CTSbeaconchannel(BCH).123.3.6.2CTSpagingchannel(CTSPCH).133.3.6.3CTSaccessrequestchannel(CTSARCH).133.3.6.4CTSaccessgrantchannel(CTSAGCH).133.4Combinationofchannels.134Thephysicalresource.134.1General.134.2Radiofrequencychannels.134.2.1Cellallocationandmobileallocation.134.2.2Downlinkanduplink.134.3TimeslotsandTDMAframes.134.3.1General.134.3.2Timeslotnumber.144.3.3TDMAframenumber.145Physicalchannels.145.1General.145.2Bursts.145.2.1General.145.2.2Typesofburstandbursttiming.145.2.3Normalburst(NB).155.2.4Frequencycorrectionburst(FB).165.2.5SynchronizationBurst(SB).175.2.6Dummyburst.175.2.7Accessburst(AB).185.2.8Guardperiod.18SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)4(GSM05.02version7.5.1Release1998)5.3Physicalchannelsandbursts.185.4Radiofrequencychannelsequence.185.5TimeslotandTDMAframesequence.195.6Parametersforchanneldefinitionandassignment.195.6.1General.195.6.2Generalparameters.195.6.3Specificparameters.196Mappingoflogicalchannelsontophysicalchannels.206.1General.206.2Mappinginfrequencyoflogicalchannelsontophysicalchannels.206.2.1General.206.2.2Parameters.206.2.3Hoppingsequencegeneration.216.2.4Specificcases.226.2.5Changeinthefrequencyallocationofabasetransceiverstation.226.2.6FrequencyassignmentinCTS.226.3Mappingintimeoflogicalchannelsontophysicalchannels.236.3.1Mappingintimeofcircuitswitchedlogicalchannelsontophysicalchannels.236.3.1.1General.236.3.1.2Keytothemappingtableofclause7.236.3.1.3MappingofBCCHdata.236.3.1.4MappingofSIDFrames.246.3.2Mappingintimeofpacketlogicalchannelsontophysicalchannels.246.3.2.1General.246.3.2.2Mappingoftheuplinkchannels.256.3.2.2.1Mappingofuplinkpackettrafficchannel(PDTCH/U)andPACCH/U.256.3.2.2.2MappingofthePacketTimingAdvanceControlChannel(PTCCH/U).256.3.2.2.3MappingoftheuplinkPCCCHi.e.PRACH.256.3.2.3Mappingofthedownlinkchannels.266.3.2.3.1Mappingofthe(PDTCH/D)andPACCH/D.266.3.2.3.2MappingofthePTCCH/D.266.3.2.3.3MappingofthePBCCH.266.3.2.3.4MappingofthePCCCH.266.3.2.4MappingofPBCCHdata.266.3.3MappingintimeofCTScontrolchannelsontophysicalchannels.276.3.3.1CTSBCHtimeslotassignment.276.3.3.2CTSPCH,CTSARCHandCTSAGCHtimeslotassignment.296.4Permittedchannelcombinations.306.4.1Permittedchannelcombinationsontoabasicphysicalchannel.306.4.2Multislotconfigurations.306.4.2.1Multislotconfigurationsforcircuitswitchedconnections.316.4.2.2Multislotconfigurationsforpacketswitchedconnections.316.5Operationofchannelsandchannelcombinations.316.5.1General.316.5.2DeterminationofCCCH_GROUPandPAGING_GROUPforMSinidlemode.336.5.3Determinationofspecificpagingmultiframeandpagingblockindex.336.5.4ShortMessageServiceCellBroadcast(SMSCB).336.5.5Voicegroupandvoicebroadcastcallnotifications.346.5.6DeterminationofPCCCH_GROUPandPAGING_GROUPforMSinGPRSattachedmode.346.5.7DeterminationofCTS_PAGING_GROUPandspecificpaging52-multiframeforMSinCTSmode.35AnnexA(normative):Phase2mobilesinaPhase1infrastructure.53A.1Scope.53A.2ImplementationoptionsforTCHchannels.53A.2.1C0fillingontheTCH.53A.2.1.1Adummyburstwith(BN61,BN62,BN86)=trainingsequencebitsofnormalbursts.53A.2.1.2Adummyburstwiththe"C0fillingtrainingsequence.53A.2.1.3Adummyburstwith(BN61,BN62,BN86)mappedfromtheTSCbitsofnormalburstsaccordingtothetable;below.53A.2.1.4PartialSIDinformation.53SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)5(GSM05.02version7.5.1Release1998)A.2.2Halfburstfilling.54A.2.2.1PartialSIDinformationfromanyassociatedSIDframe;or.54A.2.2.2Themixedbitsofthedummybursts(encryptedornotencrypted).54A.2.3DummyburstStealingflag.54A.2.4HalfburstFillingStealingflag.54A.2.5Allowedcombinations.54A.3IdleChannels.54AnnexB(normative):Multislotcapability.55B.1MSclassesformultislotcapability.55B.2Constraintsimposedbytheserviceselected.57B.3NetworkrequirementsforsupportingMSmultislotclasses.57AnnexC(informative):CTSBCHTimeslotshiftingexample.60AnnexD(informative):Changecontrolhistory.61History.62SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)6(GSM05.02version7.5.1Release1998)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).Thepresentdocumentdefinesthephysicalchannelsoftheradiosub-systemrequiredtosupportthelogicalchannelsofthedigitalmobilecellularandpersonalcommunicationsystemsoperatinginthe900MHzand1800MHzband(GSM900andDCS1800).ThecontentsofthepresentdocumentaresubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillthenberepublishedbyETSIwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7indicatesrelease1998ofGSMPhase2+.xtheseconddigitisincrementedforchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:29September2000DateoflatestannouncementofthisEN(doa):31December2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30June2001DateofwithdrawalofanyconflictingNationalStandard(dow):30June2001SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)7(GSM05.02version7.5.1Release1998)1ScopeThepresentdocumentdefinesthephysicalchannelsoftheradiosub-systemrequiredtosupportthelogicalchannels.Itincludesadescriptionofthelogicalchannelsandthedefinitionoffrequencyhopping,TDMAframes,timeslotsandbursts.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]GSM03.03:"Digitalcellulartelecommunicationssystem(Phase2+);Numbering,addressingandidentification".[3]GSM04.03:"Digitalcellulartelecommunicationssystem(Phase2+);MobileStation-BaseStationSystem(MS-BSS)interfaceChannelstructuresandaccesscapabilities".[4]GSM04.06:"Digitalcellulartelecommunicationssystem(Phase2+);MobileStation-BaseStationSystem(MS-BSS)interfaceDataLink(DL)layerspecification".[5]GSM04.08:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacelayer3specification".[6]GSM05.03:"Digitalcellulartelecommunicationssystem(Phase2+);Channelcoding".[7]GSM05.04:"Digitalcellulartelecommunicationssystem;Modulation".[8]GSM05.05:"Digitalcellulartelecommunicationssystem(Phase2+);Radiotransmissionandreception".[9]GSM05.08:"Digitalcellulartelecommunicationssystem(Phase2+);Radiosubsystemlinkcontrol".[10]GSM05.10:"Digitalcellulartelecommunicationssystem(Phase2+);Radiosubsystemsynchronization".[11]GSM03.64:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);OveralldescriptionoftheGPRSRadioInterface;Stage2".[12]GSM04.60:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);MobileStation(MS)-BaseStationSystem(BSSinterface;RadioLinkControl(RLC)andMediumAccessControl(MAC)LayerSpecification".[13]GSM03.52:"Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephonySystem(CTS),Phase1;LowerlayersoftheCTSRadioInterface;Stage2".SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)8(GSM05.02version7.5.1Release1998)[14]GSM04.56:"Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephonySystem(CTS),Phase1;CTSradiointerfacelayer3specification".[15]GSM05.56:"Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephonySystem(CTS),Phase1;CTS-FPradiosubsystem".1.2AbbreviationsAbbreviationsusedinthepresentdocumentarelistedinGSM01.04[1].2GeneralTheradiosubsystemisrequiredtosupportacertainnumberoflogicalchannelsthatcanbeseparatedintotwocategoriesasdefinedinGSM04.03:i)thetrafficchannels(TCH's);ii)thecontrolchannels.Moreinformationisgivenabouttheselogicalchannelsinclause3whichalsodefinesanumberofspecialchannelsusedbytheradiosub-system.Clause4ofthisdocumentdescribesthephysicalresourceavailabletotheradiosub-system,clause5definesphysicalchannelsbasedonthatresourceandclause6specifieshowthelogicalchannelsshallbemappedontophysicalchannels.Figure1depictsthisprocess.3Logicalchannels3.1GeneralThissubclausedescribesthelogicalchannelsthataresupportedbytheradiosubsystem.3.2Trafficchannels3.2.1GeneralTrafficchannels(TCH's)areintendedtocarryeitherencodedspeechoruserdataincircuitswitchedmode.Twogeneralformsoftrafficchannelaredefined:i)Fullratetrafficchannel(TCH/F).Thischannelcarriesinformationatagrossrateof22,8kbit/s.ii)Halfratetrafficchannel(TCH/H).Thischannelcarriesinformationatagrossrateof11,4kbit/s.Packetdatatrafficchannels(PDTCH's)areintendedtocarryuserdatainpacketswitchedmode.ForthepurposeofthisEN,anyreferencetotrafficchanneldoesnotapplytoPDTCHunlessexplicitlystated.Alltrafficchannelsarebi-directionalunlessotherwisestated.Unidirectionaldownlinkfullratechannels,TCH/FD,aredefinedasthedownlinkpartofthecorrespondingTCH/F.MultiplefullratechannelscanbeallocatedtothesameMS.Thisisreferredtoasmultislotconfigurations,whichisdefinedinsubclause6.4.2.1.MultiplepacketdatatrafficchannelscanbeallocatedtothesameMS.Thisisreferredtoasmultislotpacketconfigurations,asdefinedinsubclause6.4.2.2.Thespecifictrafficchannelsavailableinthecategoriesofspeechanduserdataaredefinedinthesubclausesfollowing.SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)9(GSM05.02version7.5.1Release1998)3.2.2SpeechtrafficchannelsThefollowingtrafficchannelsaredefinedtocarryencodedspeech:i)Fullratetrafficchannelforspeech(TCH/FS).ii)Halfratetrafficchannelforspeech(TCH/HS).iii)Enhancedfullratetrafficchannelforspeech(TCH/EFS).iv)Adaptivefullratetrafficchannelforspeech(TCH/AFS).v)Adaptivehalfratetrafficchannelforspeech(TCH/AHS).3.2.3CircuitswitcheddatatrafficchannelsThefollowingtrafficchannelsaredefinedtocarryuserdata:i)Fullratetrafficchannelfor9,6kbit/suserdata(TCH/F9.6).ii)Fullratetrafficchannelfor4,8kbit/suserdata(TCH/F4.8).iii)Halfratetrafficchannelfor4,8kbit/suserdata(TCH/H4.8).iv)Halfratetrafficchannelfor≤2,4kbit/suserdata(TCH/H2.4).v)Fullratetrafficchannelfor≤2,4kbit/suserdata(TCH/F2.4).vi)Fullratetrafficchannelfor14,4kbit/suserdata(TCH/F14.4).3.2.4Packetdatatrafficchannels(PDTCH)APDTCHcorrespondstotheresourceallocatedtoasingleMSononephysicalchannelforuserdatatransmission.Duetothedynamicmultiplexingontothesamephysicalchannelofdifferentlogicalchannels(seesubclause6.3.2),aPDTCHcarriesinformationataninstantaneousbitraterangingfrom0to22.8kbit/s.Allpacketdatatrafficchannelsareuni-directional,eitheruplink(PDTCH/U),foramobileoriginatedpackettransferordownlink(PDTCH/D)foramobileterminatedpackettransfer.3.3Controlchannels3.3.1GeneralControlchannelsareintendedtocarrysignallingorsynchronizationdata.Fourcategoriesofcontrolchannelaredefined:broadcast,common,dedicatedandCTScontrolchannels.Specificchannelswithinthesecategoriesaredefinedinthesubclausesfollowing.3.3.2Broadcastchannels3.3.2.1Frequencycorrectionchannel(FCCH)Thefrequencycorrectionchannelcarriesinformationforfrequencycorrectionofthemobilestation.Itisrequiredonlyfortheoperationoftheradiosub-system.SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)10(GSM05.02version7.5.1Release1998)3.3.2.2Synchronizationchannel(SCH)Thesynchronizationchannelcarriesinformationforframesynchronizationofthemobilestationandidentificationofabasetransceiverstation.Itisrequiredonlyfortheoperationoftheradiosub-system.Specificallythesynchronizationchannelshallcontaintwoencodedparameters:a)Basetransceiverstationidentitycode(BSIC):6bits(beforechannelcoding)consistsof3bitsofPLMNcolourcodewithrange0to7and3bitsofBScolourcodewithrange0to7asdefinedinGSM03.03.b)ReducedTDMAframenumber(RFN):19bits(beforechannelcoding)=T1(11bits)range0to2047=FNdiv(26x51)T2(5bits)range0to25=FNmod26T3'(3bits)range0to4=(T3-1)div10whereT3(6bits)range0to50=FNmod51andFN=TDMAframenumberasdefinedinsubclause4.3.3.GSM04.06andGSM04.08specifytheprecisebitordering,GSM05.03thechannelcodingoftheaboveparametersandGSM05.10defineshowtheTDMAframenumbercanbecalculatedfromT1,T2,andT3'.3.3.2.3Broadcastcontrolchannel(BCCH)Thebroadcastcontrolchannelbroadcastsgeneralinformationonabasetransceiverstationperbasetransceiverstationbasis.OfthemanyparameterscontainedintheBCCH,theuseofthefollowingparameters,asdefinedinGSM04.08arereferredtoinsubclause6.5:a)CCCH_CONFwhichindicatestheorganizationofthecommoncontrolchannels:Fromthisparameter,thenumberofcommoncontrolchannels(BS_CC_CHANS)andwhetherornotCCCHorSDCCHarecombined(BS_CCCH_SDCCH_COMB=trueorfalse)arederivedasfollows:CCCH_CONFBS_CC_CHANSBS_CCCH_SDCCH_COMB0001false0011true0102false1003false1104falseb)BS_AG_BLKS_RESwhichindicatesthenumberofblocksoneachcommoncontrolchannelreservedforaccessgrantmessages:3bits(beforechannelcoding)range0to7.c)BS_PA_MFRMSwhichindicatesthenumberof51-multiframesbetweentransmissionofpagingmessagestomobilesofthesamepaginggroup:3bits(beforechannelcoding)range2to9.d)supportofGPRSTheBCCHshallindicatewhetherornotpacketswitchedtrafficissupported.IfpacketswitchedtrafficissupportedandifthePBCCHexists,thentheBCCHshallbroadcastthepositionofthepacketdatachannel(PDCH),asdefinedinsubclause6.3.2.1,carryingthePBCCH.SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)11(GSM05.02version7.5.1Release1998)3.3.2.4PacketBroadcastControlChannel(PBCCH)ThePBCCHbroadcastsparametersusedbytheMStoaccessthenetworkforpackettransmissionoperation.InadditiontothoseparametersthePBCCHreproducestheinformationtransmittedontheBCCHtoallowcircuitswitchedoperation,suchthataMSinGPRSattachedmodemonitorsthePBCCHonly,ifitexists.TheexistenceofthePBCCHinthecellisindicatedontheBCCH.IntheabsenceofPBCCH,theBCCHshallbeusedtobroadcastinformationforpacketoperation.OfthemanyparameterscontainedinthePBCCH,theuseofthefollowingparameters,asdefinedinGSM04.60arereferredtoinsubclause6.5and6.3.2:a)BS_PBCCH_BLKS(1,.,4)indicatesthenumberofblocksallocatedtothePBCCHinthemultiframe.ThepositionofthePBCCHblocksisbasedontheorderedlistasdefinedinsubclause6.3.2.1.b)BS_PCC_CHANSindicatesthenumberofphysicalchannelscarryingPCCCHsincludingthephysicalchannelcarryingthePBCCHc)BS_PAG_BLKS_RESindicatesthenumberofblocksoneachPDCHcarryingPCCCHpermultiframewhereneitherpacketpagingnorPBCCHshouldappear.ThisnumbercorrespondsthereforetothenumberofblocksreservedforPAGCH,PNCH,PDTCHandPACCH.d)BS_PRACH_BLKSindicatesthenumberofblocksreservedinafixedwaytothePRACHchannelonanyPDCHcarryingPCCCH.ThepositionofthePRACHblocksisbasedontheorderedlistasdefinedinsubclause6.3.2.1.3.3.3Commoncontroltypechannels3.3.3.1Commoncontroltypechannels,knownwhencombinedasacommoncontrolchannel(CCCH)i)Pagingchannel(PCH):Downlinkonly,usedtopagemobiles.ii)Randomaccesschannel(RACH):Uplinkonly,usedtorequestallocationofaSDCCH.iii)Accessgrantchannel(AGCH):Downlinkonly,usedtoallocateaSDCCHordirectlyaTCH.iv)Notificationchannel(NCH):Downlinkonly,usedtonotifymobilestationsofvoicegroupandvoicebroadcastcalls.3.3.3.2PacketCommoncontrolchannels(PCCCH)i)PacketPagingchannel(PPCH):Downlinkonly,usedtopageMS.ii)PacketRandomaccesschannel(PRACH):Uplinkonly,usedtorequestallocationofoneorseveralPDTCHs(foruplinkordownlinkdirection).iii)PacketAccessgrantchannel(PAGCH):Downlinkonly,usedtoallocateoneorseveralPDTCH.iv)PacketNotificationchannel(PNCH):Downlinkonly,usedtonotifyMSofPTM-Mcall.IfaPCCCHisnotallocated,theinformationforpacketswitchedoperationistransmittedontheCCCH.IfaPCCCHisallocated,itmaytransmitinformationforcircuitswitchedoperation.3.3.4Dedicatedcontrolchannels3.3.4.1Circuitswitcheddedicatedcontrolchannelsi)Slow,TCH/Fassociated,controlchannel(SACCH/TF).ii)Fast,TCH/Fassociated,controlchannel(FACCH/F).iii)Slow,TCH/Hassociated,controlchannel(SACCH/TH).SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)12(GSM05.02version7.5.1Release1998)iv)Fast,TCH/Hassociated,controlchannel(FACCH/H).v)Standalonededicatedcontrolchannel(SDCCH/8).vi)Slow,SDCCH/8associated,controlchannel(SACCH/C8)vii)Standalonededicatedcontrolchannel,combinedwithCCCH(SDCCH/4).viii)Slow,SDCCH/4associated,controlchannel(SACCH/C4).ix)slow,TCH/Fassociated,controlchannelformultislotconfigurations(SACCH/M).x)slow,TCH/Fassociated,controlchannelforCTS(SACCH/CTS).Allassociatedcontrolchannelshavethesamedirection(bi-directionalorunidirectional)asthechannelstheyareassociatedto.TheunidirectionalSACCH/MDisdefinedasthedownlinkpartofSACCH/M.3.3.4.2Packetdedicatedcontrolchannelsi)ThePacketAssociatedControlchannel(PACCH):ThePACCHisbi-directional.FordescriptionpurposesPACCH/UisusedfortheuplinkandPACCH/Dforthedownlink.ii)PacketTimingadvancecontrolchanneluplink(PTCCH/U):UsedtotransmitrandomaccessburststoallowestimationofthetimingadvanceforoneMSinpackettransfermode.iii)PacketTimingadvancecontrolchanneldownlink(PTCCH/D):UsedtotransmittimingadvanceupdatesforseveralMS.OnePTCCH/DispairedwithseveralPTCCH/U's.3.3.5CellBroadcastChannel(CBCH)TheCBCH,downlinkonly,isusedtocarrytheshortmessageservicecellbroadcast(SMSCB).TheCBCHusesthesamephysicalchannelastheSDCCH.3.3.6CTScontrolchannelsFourtypesofCTScontrolchannelsaredefined:3.3.6.1CTSbeaconchannel(BCH)TheBCHisusedtoprovidefrequencyandsynchronizationinformationinthedownlink.ItismadeupofapairofCTSBCH-SB(Synchronizationburst)andCTSBCH-FB(Frequencycorrectionburst).TheCTSBCH-FBcarriesinformationforfrequencycorrectionofthemobilestation.Itisrequiredonlyfortheoperationoftheradiosub-system.TheCTSBCH-SBcarriessignallinginformationandidentificationofaCTS-FP.SpecificallytheCTSBCH-SBshallcontainfiveencodedparameters:a)StatusoftheCTS-FPradioresources:1bit(beforechannelcoding);b)FlagindicatingthepresenceofCTSPCHinthenext52-multiframe:1bit(beforechannelcoding);c)FlagindicatingwhethertheCTS-FPiscurrentlyperformingtimeslotshiftingonCTSBCH:1bit(beforechannelcoding);d)CTScontrolchannels(exceptCTSBCH)timeslotnumberforthenext52-multiframe(TNC):3bits(beforechannelcoding);e)CTS-FPbeaconidentity(FPBI):19bits(beforechannelcoding),asdefinedinGSM03.03.GSM04.56specifiestheprecisebitorderingandGSM05.03thechannelcodingoftheaboveparameters.SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)13(GSM05.02version7.5.1Release1998)3.3.6.2CTSpagingchannel(CTSPCH)Downlinkonly,usedtobroadcastinformationforpaging.3.3.6.3CTSaccessrequestchannel(CTSARCH)Uplinkonly,usedtorequestallocationofadedicatedRRconnection.3.3.6.4CTSaccessgrantchannel(CTSAGCH)Downlinkonly,usedtograntadedicatedRRconnection.3.4CombinationofchannelsOnlycertaincombinationsofchannelsareallowedasdefinedinGSM04.03.Subclause6.4liststhecombinationsinrelationtobasicphysicalchannels.4Thephysicalresource4.1GeneralThephysicalresourceavailabletotheradiosub-systemisanallocationofpartoftheradiospectrum.Thisresourceispartitionedbothinfrequencyandtime.Frequencyispartitionedbyradiofrequencychannels(RFCHs)dividedintobandsasdefinedinGSM05.05.TimeispartitionedbytimeslotsandTDMAframesasdefinedinsubclause4.3ofthisEN.4.2Radiofrequencychannels4.2.1CellallocationandmobileallocationGSM05.05definesradiofrequencychannels(RFCHs),andallocatesnumberstoalltheradiofrequencychannelsavailabletothesystem.Eachcellisallocatedasubsetofthesechannels,definedasthecellallocation(CA).OneradiofrequencychannelofthecellallocationshallbeusedtocarrysynchronizationinformationandtheBCCH,thisshallbeknownasBCCHcarrier.Thesubsetofthecellallocation,allocatedtoaparticularmobile,shallbeknownasthemobileallocation(MA).4.2.2DownlinkanduplinkThedownlinkcomprisesradiofrequencychannelsusedinthebasetransceiverstationtoMobileStationdirection.Theuplinkcomprisesradiofrequencychannelsusedinthemobilestationtobasetransceiverstationdirection.4.3TimeslotsandTDMAframes4.3.1GeneralAtimeslotshallhaveadurationof3/5200seconds(≈577µs).EighttimeslotsshallformaTDMAframe(≈4,62msinduration).AtthebasetransceiverstationtheTDMAframesonalloftheradiofrequencychannelsinthedownlinkshallbealigned.Thesameshallapplytotheuplink(seeGSM05.10).AtthebasetransceiverstationthestartofaTDMAframeontheuplinkisdelayedbythefixedperiodof3timeslotsfromthestartoftheTDMAframeonthedownlink(seefigure2).SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)14(GSM05.02version7.5.1Release1998)Atthemobilestationthisdelaywillbevariabletoallowadjustmentforsignalpropagationdelay.TheprocessofadjustingthisadvanceisknownasadaptiveframealignmentandisdetailedinGSM05.10.ThestaggeringofTDMAframesusedinthedownlinkanduplinkisinordertoallowthesametimeslotnumbertobeusedinthedownlinkanduplinkwhilstavoidingtherequirementforthemobilestationtotransmitandreceivesimultaneously.Theperiodincludestimeforadaptiveframealignment,transceivertuningandreceive/transmitswitching(seefigure4).4.3.2TimeslotnumberThetimeslotswithinaTDMAframeshallbenumberedfrom0to7andaparticulartimeslotshallbereferredtobyitstimeslotnumber(TN).4.3.3TDMAframenumberTDMAframesshallbenumberedbyaframenumber(FN).Theframenumbershallbecyclicandshallhavearangeof0toFN_MAXwhereFN_MAX=(26x51x2048)-1=2715647asdefinedinGSM05.10.TheframenumbershallbeincrementedattheendofeachTDMAframe.ThecompletecycleofTDMAframenumbersfrom0toFN_MAXisdefinedasahyperframe.Ahyperframeconsistsof2048superframeswhereasuperframeisdefinedas26x51TDMAframes.A26-multiframe,comprising26TDMAframes,isusedtosupporttrafficandassociatedcontrolchannelsanda51-multiframe,comprising51TDMAframes,isusedtosupportbroadcast,commoncontrolandstandalonededicatedcontrol(andtheirassociatedcontrol)channels.Henceasuperframemaybeconsideredas51traffic/associatedcontrolmultiframesor26broadcast/commoncontrolmultiframes.A52-multiframe,comprisingtwo26-multiframes,isusedtosupportpacketdatatrafficandcontrolchannels.TheneedforahyperframeofasubstantiallylongerperiodthanasuperframearisesfromtherequirementsoftheencryptionprocesswhichusesFNasaninputparameter.5Physicalchannels5.1GeneralAphysicalchannelusesacombinationoffrequencyandtimedivisionmultiplexingandisdefinedasasequenceofradiofrequencychannelsandtimeslots.Thecompletedefinitionofaparticularphysicalchannelconsistsofadescriptioninthefrequencydomain,andadescriptioninthetimedomain.Thedescriptioninthefrequencydomainisaddressedinsubclause5.4,thedescriptioninthetimedomainisaddressedinsubclause5.5.5.2Bursts5.2.1GeneralAburstisaperiodofR.Fcarrierwhichismodulatedbyadatastream.Aburstthereforerepresentsthephysicalcontentofatimeslot.5.2.2TypesofburstandbursttimingAtimeslotisdividedinto156,25bitperiods.Aparticularbitperiodwithinatimeslotisreferencedbyabitnumber(BN),withthefirstbitperiodbeingnumbered0,andthelast(1/4)bitperiodbeingnumbered156.Inthesubclausesfollowingthetransmissiontimingofaburstwithinatimeslotisdefinedintermsofbitnumber.Thebitwiththelowestbitnumberistransmittedfirst.Differenttypesofburstexistinthesystem.Onecharacteristicofaburstisitsusefulduration.Thisdocument,inthesubclausesfollowing,definesfourfullburstsof147bitsusefulduration,andoneshortburstof87bitsusefulduration.SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)15(GSM05.02version7.5.1Release1998)Theusefulpartofaburstisdefinedasbeginningfromhalfwaythroughbitnumber0.ThedefinitionoftheusefulpartofaburstneedstobeconsideredinconjunctionwiththerequirementsplacedonthephaseandamplitudecharacteristicsofaburstasspecifiedinGSM05.04and05.05.Theperiodbetweenburstsappearinginsuccessivetimeslotsistermedtheguardperiod.Subclause5.2.8detailsconstraintswhichrelatetotheguardperiod.5.2.3Normalburst(NB)NormalburstforGMSKBitNumber(BN)LengthoffieldContentsoffieldDefinition0-23tailbits(below)3-6058encryptedbits(e0.e57)05.0361-8626trainingsequencebits(below)87-14458encryptedbits(e58.e115)05.03145-1473tailbits(below)(148-1568,25guardperiod(bits)subclause5.2.8)-wherethe"tailbits"aredefinedasmodulatingbitswithstatesasfollows:(BN0,BN1,BN2)=(0,0,0)and(BN145,BN146,BN147)=(0,0,0)-wherethe"trainingsequencebits"aredefinedasmodulatingbitswithstatesasgiveninthefollowingtableaccordingtothetrainingsequencecode,TSC.Forbroadcastandcommoncontrolchannels,theTSCmustbeequaltotheBCC,asdefinedinGSM03.03andasdescribedinthistechnicalspecificationinsubclause3.3.2.InnetworkssupportingE-OTDLocationservices(seeGSM03.71AnnexC),theTSCshallbeequaltotheBCCforallnormalburstsonBCCHfrequencies.-ForCTScontrolchannels,theTSCshallbedefinedbythe3LSBs(BN3,BN2,BN1)oftheFPBI(specifiedinGSM03.03).TrainingTrainingsequencebitsSequence(BN61,BN62.BN86)Code(TSC)0(0,0,1,0,0,1,0,1,1,1,0,0,0,0,1,0,0,0,1,0,0,1,0,1,1,1)1(0,0,1,0,1,1,0,1,1,1,0,1,1,1,1,0,0,0,1,0,1,1,0,1,1,1)2(0,1,0,0,0,0,1,1,1,0,1,1,1,0,1,0,0,1,0,0,0,0,1,1,1,0)3(0,1,0,0,0,1,1,1,1,0,1,1,0,1,0,0,0,1,0,0,0,1,1,1,1,0)4(0,0,0,1,1,0,1,0,1,1,1,0,0,1,0,0,0,0,0,1,1,0,1,0,1,1)5(0,1,0,0,1,1,1,0,1,0,1,1,0,0,0,0,0,1,0,0,1,1,1,0,1,0)6(1,0,1,0,0,1,1,1,1,1,0,1,1,0,0,0,1,0,1,0,0,1,1,1,1,1)7(1,1,1,0,1,1,1,1,0,0,0,1,0,0,1,0,1,1,1,0,1,1,1,1,0,0)Undercertaincircumstancesonlyhalftheencryptedbitspresentinanormalburstwillcontaincompleteinformation.FordownlinkDTXoperationonTCH-FSandTCH-HS,whenatrafficframe(asdefinedinGSM06.31)isscheduledfortransmissionandoneofitsadjacenttrafficframesisnotscheduledfortransmission,theotherhalfoftheencryptedbitsinthenormalburstsassociatedwiththescheduledtrafficframeshallcontainpartialSIDinformationfromanyassociatedSIDframe,withtheappropriatestealingflagsBN60orBN87setto0.Inothercasesthebinarystateoftheremainingbitsisnotspecified.Normalburstfor8PSKNormalburstfor8-PSKisspecifiedhereforreferencepurposesonly.8-PSKmodulatedburstsarenotusedinnetworkssupportingRelease98.TheburstisanywayspecifiedheretomakesurethatRelease98mobilessupportingE-OTDLCSwillbeabletodomeasurementson8-PSKmodulatedbursts.SIST EN 300 908 V7.5.1:2003

ETSIETSIEN300908V7.5.1(2000-10)16(GSM05.02version7.5.1Release1998)BitNumber(BN)Lengthoffield(bits)ContentsoffieldDefinition0–89tailbits(below)9–182174encryptedbits(e0.e173)Undefined183–26078trainingsequencebits(below)261–434174encryptedbits(e174.e347)Undefined435–4439tailbits(below)444-46824.75guardperiodSubclause5.2.8-wherethe"tailbits"aredefinedasmodulatingbitswithstatesasfollows(bitsaregroupedinsymbolsseparatedby;):(BN0,BN1.BN8)=(1,1,1;1,1,1;1,1,1)and(BN435,BN436.BN443)=(1,1,1;1,1,1;1,1,1)-wherethe"trainingsequencebits"aredefinedasmodulatingbitswithstatesasgiveninthefollowingtableaccordingtothetrainingsequencecode,TSC.Forbroadcastandcommoncontrolchannels,theTSCmustbeequaltotheBCC,asdefinedinGSM03.03andasdescribedinthistechnicalspecificationinsubclause3.3.2.InnetworkssupportingE-OTDLocationservices(seeGSM03.71AnnexC),theTSCshallbeequaltotheBCCforallnormalburstsonBCCHfrequencies.TrainingTrainingsequencesymbolsSequence(BN183,BN184.BN260)Code(TSC)0(1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;1,1,1;1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1)1(1,1,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;0,0,1;1,1,1;1,1,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1)2(1,1,1;0,0,1;1,1,1;1,1,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1)3(1,1,1;0,0,1;1,1,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;1,1,1;0,0,1;1,1,1;1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;0,0,1;1,1,1)4(1,1,1;1,1,1;1,1,1;0,0,1;0,0,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;1,1,1;1,1,1;1,1,1;0,0,1;0,0,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1)5(1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1;1,1,1;1,1,1;1,1,1;1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;1,1,1)6(0,0,1;1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;1,1,1;1,1,1;1,1,1;0,0,1;1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;0,0,1;0,0,1;0,0,1;0,0,1)7(0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;0,0,1;1,1,1;1,1,1;1,1,1;0,0,1;1,1,1;1,1,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;1,1,1;0,0,1;0,0,1;0,0,1;0,0,1;1,1,1;1,1,1)5.2.4Frequencycorrectionburst(FB)BitNumberleng
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