SIST EN 300 908 V6.8.1:2003

• Abstract:

  CRs SMG#31

• 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 V6.8.1 (2000-09) - Digital cellular telecommunications system (Phase 2+) (GSM); Multiplexing and multiple access on the radio path (GSM 05.02 version 6.8.1 Release 1997)

Overview

SIST EN 300 908 V6.8.1:2003 establishes the foundational requirements for multiplexing and multiple access on the radio path within digital cellular telecommunications systems (GSM Phase 2+). Developed by the Slovenski inštitut za standardizacijo (SIST) and harmonized with European Norm EN 300 908, this standard addresses the efficient utilization of the radio spectrum for Global System for Mobile Communications (GSM), focusing on channel structure, logical and physical channel definition, and mechanisms that underpin GSM radio access.

The standard is vital for network operators, equipment manufacturers, and systems engineers involved in the development, deployment, and maintenance of GSM networks in the 900 MHz and 1800 MHz bands.

Key Topics

• Logical and Physical Channels:
  Definitions and categorizations of channels that carry user data (traffic channels) and signalling data (control channels) across the GSM air interface.

• Multiplexing Techniques:
  Utilization of both Time Division Multiple Access (TDMA) and frequency partitioning to maximize channel efficiency.

• TDMA Frame Structure:
  Description of timeslots, TDMA frames, multiframe structures, and frame numbering schemes essential for synchronization and communication.

• Frequency and Time Partitioning:
  Rules on how radio frequency channels are allocated among cells and users, and how time is divided into discrete intervals for simultaneous communications.

• Burst Types and Timing:
  Specification of different burst formats, including normal, synchronization, frequency correction, and dummy bursts, each serving a particular role in communication or network management.

• Channel Mapping and Combinations:
  Procedures for mapping logical channels to physical channels, including permitted channel combinations and multislot configurations.

Applications

SIST EN 300 908 V6.8.1:2003 is applied throughout the lifecycle of GSM network infrastructure, including:

• Network Planning and Design:
  Supporting radio planning teams in optimizing frequency reuse and timeslot allocations for high user density and service reliability.

• Base Station Implementation:
  Providing technical guidance for developers to ensure that base transceiver stations (BTS) comply with GSM channel structures and multiplexing principles.

• Mobile Devices and Terminals:
  Ensuring interoperability and consistent user experience across different manufacturers and models by standardizing channel usage and assignment.

• Network Interoperability:
  Facilitating seamless communication between equipment from multiple vendors thanks to harmonized radio access methods.

• Expansion and Upgrades:
  Supporting the introduction of features like GPRS and multislot operations while maintaining backward compatibility with earlier GSM phases.

Related Standards

Implementation and interpretation of SIST EN 300 908 V6.8.1:2003 are supported by several related GSM standards, including:

• GSM 05.03: Channel Coding
• GSM 05.04: Modulation
• GSM 05.05: Radio Transmission and Reception
• GSM 05.08: Radio Subsystem Link Control
• GSM 05.10: Radio Subsystem Synchronization
• GSM 03.03: Numbering, Addressing, and Identification
• GSM 04.08: Mobile Radio Interface Layer 3 Specification
• GSM 04.60: GPRS Radio Link Control and Medium Access Control
• GSM 01.04: Abbreviations and Acronyms

Practical Value

Complying with SIST EN 300 908 V6.8.1:2003 ensures efficient frequency utilization, robust synchronization, and compatibility across the global GSM ecosystem. By clearly defining multiplexing and access methods for both circuit-switched and packet-switched services (e.g., GPRS), the standard underpins reliable mobile telecommunications and paves the way for future enhancements.

Keywords: GSM standard, multiplexing, multiple access, TDMA, logical channels, physical channels, radio path, frequency allocation, mobile communication, SIST, EN 300 908

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 6.8.1 Release 1997)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 908 Version 6.8.1SIST EN 300 908 V6.8.1:2003en01-december-2003SIST EN 300 908 V6.8.1:2003SLOVENSKI
STANDARD
ETSIEN300908V6.8.1(2000-09)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);Multiplexingandmultipleaccessontheradiopath(GSM05.02version6.8.1Release1997)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)2(GSM05.02version6.8.1Release1997)ReferenceREN/SMG-020502Q6R6KeywordsDigitalcellulartelecommunicationssystem,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 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)3(GSM05.02version6.8.1Release1997)ContentsIntellectualPropertyRights.6Foreword.61Scope.71.1References.71.2Abbreviations.72General.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.123.3.4.1Circuitswitcheddedicatedcontrolchannels.123.3.4.2Packetdedicatedcontrolchannels.123.3.5CellBroadcastChannel(CBCH).123.4Combinationofchannels.124Thephysicalresource.124.1General.124.2Radiofrequencychannels.134.2.1Cellallocationandmobileallocation.134.2.2Downlinkanduplink.134.3TimeslotsandTDMAframes.134.3.1General.134.3.2Timeslotnumber.134.3.3TDMAframenumber.135Physicalchannels.145.1General.145.2Bursts.145.2.1General.145.2.2Typesofburstandbursttiming.145.2.3Normalburst(NB).145.2.4Frequencycorrectionburst(FB).155.2.5SynchronizationBurst(SB).155.2.6Dummyburst.165.2.7Accessburst(AB).165.2.8Guardperiod.175.3Physicalchannelsandbursts.175.4Radiofrequencychannelsequence.175.5TimeslotandTDMAframesequence.175.6Parametersforchanneldefinitionandassignment.175.6.1General.17SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)4(GSM05.02version6.8.1Release1997)5.6.2Generalparameters.175.6.3Specificparameters.186Mappingoflogicalchannelsontophysicalchannels.186.1General.186.2Mappinginfrequencyoflogicalchannelsontophysicalchannels.186.2.1General.186.2.2Parameters.186.2.3Hoppingsequencegeneration.196.2.4Specificcases.206.2.5Changeinthefrequencyallocationofabasetransceiverstation.206.3Mappingintimeoflogicalchannelsontophysicalchannels.206.3.1Mappingintimeofcircuitswitchedlogicalchannelsontophysicalchannels.206.3.1.1General.206.3.1.2Keytothemappingtableofclause7.206.3.1.3MappingofBCCHdata.216.3.1.4MappingofSIDFrames.216.3.2Mappingintimeofpacketlogicalchannelsontophysicalchannels.226.3.2.1General.226.3.2.2Mappingoftheuplinkchannels.226.3.2.2.1Mappingofuplinkpackettrafficchannel(PDTCH/U)andPACCH/U.226.3.2.2.2MappingofthePacketTimingAdvanceControlChannel(PTCCH/U).226.3.2.2.3MappingoftheuplinkPCCCHi.e.PRACH.236.3.2.3Mappingofthedownlinkchannels.236.3.2.3.1Mappingofthe(PDTCH/D)andPACCH/D.236.3.2.3.2MappingofthePTCCH/D.236.3.2.3.3MappingofthePBCCH.236.3.2.3.4MappingofthePCCCH.236.3.2.4MappingofPBCCHdata.236.4Permittedchannelcombinations.246.4.1Permittedchannelcombinationsontoabasicphysicalchannel.246.4.2Multislotconfigurations.256.4.2.1Multislotconfigurationsforcircuitswitchedconnections.256.4.2.2Multislotconfigurationsforpacketswitchedconnections.256.5Operationofchannelsandchannelcombinations.266.5.1General.266.5.2DeterminationofCCCH_GROUPandPAGING_GROUPforMSinidlemode.276.5.3Determinationofspecificpagingmultiframeandpagingblockindex.276.5.4ShortMessageServiceCellBroadcast(SMSCB).276.5.5Voicegroupandvoicebroadcastcallnotifications.286.5.6DeterminationofPCCCH_GROUPandPAGING_GROUPforMSinGPRSattachedmode.28AnnexA(normative):Phase2mobilesinaPhase1infrastructure.45A.1Scope.45A.2ImplementationoptionsforTCHchannels.45A.2.1C0fillingontheTCH.45A.2.1.1Adummyburstwith(BN61,BN62,BN86)=trainingsequencebitsofnormalbursts.45A.2.1.2Adummyburstwiththe"C0fillingtrainingsequence.45A.2.1.3Adummyburstwith(BN61,BN62,BN86)mappedfromtheTSCbitsofnormalburstsaccordingtothetable;below.45A.2.1.4PartialSIDinformation.45A.2.2Halfburstfilling.45A.2.2.1PartialSIDinformationfromanyassociatedSIDframe;or.46A.2.2.2Themixedbitsofthedummybursts(encryptedornotencrypted).46A.2.3DummyburstStealingflag.46A.2.4HalfburstFillingStealingflag.46A.2.5Allowedcombinations.46SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)5(GSM05.02version6.8.1Release1997)A.3IdleChannels.46AnnexB(normative):Multislotcapability.47B.1MSclassesformultislotcapability.47B.2Constraintsimposedbytheserviceselected.49B.3NetworkrequirementsforsupportingMSmultislotclasses.49AnnexC(informative):Changecontrolhistory.52History.53SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)6(GSM05.02version6.8.1Release1997)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:Version6.x.ywhere:6indicatesrelease1997ofGSMPhase2+.xtheseconddigitisincrementedforchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:25August2000DateoflatestannouncementofthisEN(doa):30November2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2001DateofwithdrawalofanyconflictingNationalStandard(dow):31May2001SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)7(GSM05.02version6.8.1Release1997)1ScopeThepresentdocumentdefinesthephysicalchannelsoftheradiosub-systemrequiredtosupportthelogicalchannels.Itincludesadescriptionofthelogicalchannelsandthedefinitionoffrequencyhopping,TDMAframes,timeslotsandbursts.1.1ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.• ForthisRelease1997document,referencestoGSMdocumentsareforRelease1997versions(version6.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".1.2AbbreviationsAbbreviationsusedinthepresentdocumentarelistedinGSM01.04[1].SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)8(GSM05.02version6.8.1Release1997)2GeneralTheradiosubsystemisrequiredtosupportacertainnumberoflogicalchannelsthatcanbeseparatedintotwocategoriesasdefinedinGSM04.03:i)thetrafficchannels(TCH's);ii)thecontrolchannels.Moreinformationisgivenabouttheselogicalchannelsinclause3whichalsodefinesanumberofspecialchannelsusedbytheradiosub-system.Clause4ofthepresentdocumentdescribesthephysicalresourceavailabletotheradiosub-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.Forthepurposeofthepresentdocument,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 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)9(GSM05.02version6.8.1Release1997)3.2.2SpeechtrafficchannelsThefollowingtrafficchannelsaredefinedtocarryencodedspeech:i)fullratetrafficchannelforspeech(TCH/FS);ii)halfratetrafficchannelforspeech(TCH/HS).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.Threecategoriesofcontrolchannelaredefined:broadcast,commonanddedicated.Specificchannelswithinthesecategoriesaredefinedinthesubclausesfollowing.3.3.2Broadcastchannels3.3.2.1Frequencycorrectionchannel(FCCH)Thefrequencycorrectionchannelcarriesinformationforfrequencycorrectionofthemobilestation.Itisrequiredonlyfortheoperationoftheradiosub-system.SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)10(GSM05.02version6.8.1Release1997)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 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)11(GSM05.02version6.8.1Release1997)3.3.2.4PacketBroadcastControlChannel(PBCCH)ThePBCCHbroadcastsparametersusedbytheMStoaccessthenetworkforpackettransmissionoperation.InadditiontothoseparametersthePBCCHreproducestheinformationtransmittedontheBCCHtoallowcircuitswitchedoperation,suchthataMSinGPRSattachedmodemonitorsthePBCCHonly,ifitexists.TheexistenceofthePBCCHinthecellisindicatedontheBCCH.IntheabsenceofPBCCH,theBCCHshallbeusedtobroadcastinformationforpacketoperation.OfthemanyparameterscontainedinthePBCCH,theuseofthefollowingparameters,asdefinedinGSM04.60arereferredtoinsubclauses6.5and6.3.2: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.SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)12(GSM05.02version6.8.1Release1997)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).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).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.3.4CombinationofchannelsOnlycertaincombinationsofchannelsareallowedasdefinedinGSM04.03.Subclause6.4liststhecombinationsinrelationtobasicphysicalchannels.4Thephysicalresource4.1GeneralThephysicalresourceavailabletotheradiosub-systemisanallocationofpartoftheradiospectrum.Thisresourceispartitionedbothinfrequencyandtime.Frequencyispartitionedbyradiofrequencychannels(RFCHs)dividedintobandsasdefinedinGSM05.05.TimeispartitionedbytimeslotsandTDMAframesasdefinedinsubclause4.3ofthepresentdocument.SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)13(GSM05.02version6.8.1Release1997)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).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.SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)14(GSM05.02version6.8.1Release1997)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.Thepresentdocument,inthesubclausesfollowing,definesfourfullburstsof147bitsusefulduration,andoneshortburstof87bitsusefulduration.Theusefulpartofaburstisdefinedasbeginningfromhalfwaythroughbitnumber0.ThedefinitionoftheusefulpartofaburstneedstobeconsideredinconjunctionwiththerequirementsplacedonthephaseandamplitudecharacteristicsofaburstasspecifiedinGSM05.04and05.05.Theperiodbetweenburstsappearinginsuccessivetimeslotsistermedtheguardperiod.Subclause5.2.8detailsconstraintswhichrelatetotheguardperiod.5.2.3Normalburst(NB)BitNumber(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.SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)15(GSM05.02version6.8.1Release1997)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.5.2.4Frequencycorrectionburst(FB)BitNumberlengthContentsDefinition(BN)offieldoffield0-23tailbits(below)3-144142fixedbits(below)145-1473tailbits(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"fixedbits"aredefinedasmodulatingbitswithstatesasfollows:(BN3,BN4.BN144)=(0,0.0)NOTE:Thisburstisequivalenttounmodulatedcarrierwitha+1625/24kHzfrequencyoffset,abovethenominalcarrierfrequency.5.2.5SynchronizationBurst(SB)BitNumberLengthContentsDefinition(BN)offieldoffield0-23tailbits(below)3-4139encryptedbits(e0.e38)05.0342-10564extendedtrainingsequencebits(below)106-14439encryptedbits(e39.e77)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)SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)16(GSM05.02version6.8.1Release1997)-wherethe"extendedtrainingsequencebits"aredefinedasmodulatingbitswithstatesasfollows:(BN42,BN43.BN105)=(1,0,1,1,1,0,0,1,0,1,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,1,1,0,0,1,0,1,1,0,1,0,1,0,0,0,1,0,1,0,1,1,1,0,1,1,0,0,0,0,1,1,0,1,1)5.2.6DummyburstBitNumberLengthContentsDefinition(BN)offieldoffield0-23tailbits(below)3-144142mixedbits(below)145-1473tailbits(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"mixedbits"aredefinedasmodulatingbitswithstatesasfollows:(BN3,BN4.BN144)=(1,1,1,1,1,0,1,1,0,1,1,1,0,1,1,0,0,0,0,0,1,0,1,0,0,1,0,0,1,1,1,0,0,0,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,1,1,1,0,0,0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0,0,1,0,10,1,1,1,0,1,0,0,1,0,1,0,0,0,1,1,0,0,1,1,0,0,1,1,1,0,0,1,1,1,1,0,1,0,0,1,1,1,1,1,0,0,0,1,0,0,1,0,1,1,1,1,1,0,1,0,1,0)5.2.7Accessburst(AB)BitNumberLengthContentsDefinition(BN)offieldoffield0-78extendedtailbits(below)8-4841synch.sequencebits(below)49-8436encryptedbits(e0.e35)05.0385-873tailbits(below)(88-15668,25extendedguardperiod(bits)subclause5.2.8)-wherethe"extendedtailbits"aredefinedasmodulatingbitswiththefollowingstates:(BN0,BN1,BN2.BN7)=(0,0,1,1,1,0,1,0)-wherethe"tailbits"aredefinedasmodulatingbitswiththefollowingstates:(BN85,BN86,BN87)=(0,0,0)-wherethe"sync.sequencebits"aredefinedasmodulatingbitswiththefollowingstates:(BN8,BN9.BN48)=(0,1,0,0,1,0,1,1,0,1,1,1,1,1,1,1,1,0,0,1,1,0,0,1,1,0,1,0,1,0,1,0,0,0,1,1,1,1,0,0,0)SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)17(GSM05.02version6.8.1Release1997)5.2.8GuardperiodTheguardperiodisprovidedbecauseitisrequiredfortheMSsthattransmissionbeattenuatedfortheperiodbetweenburstswiththenecessaryrampupanddownoccurringduringtheguardperiodsasdefinedinGSM05.05.Abasetransceiverstationisnotrequiredtohaveacapabilitytorampdownandupbetweenadjacentbursts,butisrequiredtohaveacapabilitytorampdownandupfornon-usedtime-slots,asdefinedinGSM05.05.Inanycasewheretheamplitudeoftransmissionisrampedupanddown,thenbyapplyinganappropriatemodulationbitstreaminterferencetootherRFchannelscanbeminimized.5.3PhysicalchannelsandburstsThedescriptionofaphysicalchannelwillbemadeintermsoftimeslotsandTDMAframesandnotintermsofbursts.Thisisbecausethereisnotaonetoonemappingbetweenaparticularphysicalchannel,andtheuseofaparticularburst.5.4RadiofrequencychannelsequenceTheradiofrequencychannelsequenceisdeterminedbyafunctionthat,inagivencell,withagivensetofgeneralparameters,(seesubclause5.6.2),withagiventimeslotnumber(TN),agivenmobileradiofrequencychannelallocation(MA)andagivenmobileallocationindexoffset(MAIO),mapstheTDMAframenumber(FN)toaradiofrequencychannel.Inagivencellthereistherefore,foraphysicalchannelassignedtoaparticularmobile,auniquecorrespondencebetweenradiofrequencychannelandTDMAframenumber.Thedetailedhoppinggenerationalgorithmisgiveninsubclause6.2.5.5TimeslotandTDMAframesequenceAgivenphysicalchannelshallalwaysusethesametimeslotnumberineveryTDMAframe.Thereforeatimeslotsequenceisdefinedby:i)atimeslotnumber(TN);andii)aTDMAframenumbersequence.ThedetaileddefinitionsofTDMAframenumbersequencesaregiveninclause7.ThephysicalchannelswheretheTDMAframenumbersequenceis0,1.FN_MAX(whereFN_MAXisdefinedinsubclause4.3.3)arecalled"basicphysicalchannels".5.6Parametersforchanneldefinitionandassignment5.6.1GeneralThissubclausedescribesthesetofparametersnecessarytodescribefullythemappingofanylogicalchannelontoaphysicalchannel.Theseparametersmaybedividedintogeneralparameters,thatarecharacteristicofaparticularbasetransceiverstation,andspecificparameters,thatarecharacteristicofagivenphysicalchannel.5.6.2GeneralparametersTheseare:i)thesetofradiofrequencychannelsusedinthecell(CA),togetherwiththeidentificationoftheBCCHcarrier;ii)theTDMAframenumber(FN),whichcanbederivedfromthereducedTDMAframenumber(RFN)whichisintheformT1,T2,T3',seesubclause3.3.2.SIST EN 300 908 V6.8.1:2003

ETSIETSIEN300908V6.8.1(2000-09)18(GSM05.02version6.8.1Release1997)Theseparametersarebroadcast(orderivedfromparametersbroadcast)intheBCCHandSCH.5.6.3SpecificparametersTheseparametersdefineaparticularphysicalchannelinabasetransceiverstation.Theyare:o)thetrainingsequenceCode(TSC);i)thetimeslotnumber(TN);ii)themobileradiofrequencychannelallocation(MA);iii)themobileallocationindexoffset(MAIO);iv)thehoppingsequencenumber(HSN);v)thetypeoflogicalchannel;vi)thesub-channelnumber(SCN).Thelasttwoparametersallowthedeterminationoftheframesequence.6Mappingoflogicalchannelsontophysicalchannels6.1GeneralThedetailedmappingoflogicalchannelsontophysicalchannelsisdefinedinthefollowingsections.Subclause6.2definesthemappingfromTDMAframenumber(FN)toradiofrequencychannel(RFCH).Subclause6.3definesthemappingofthephysicalchannelontoTDMAframenumber.Subclause6.4liststhepermittedchannelcombinationsandsubclause6.5definestheoperationofchannelsandchannelcombinations.6.2Mappinginfrequencyoflogicalchannelsontophysicalchannels6.2.1GeneralTheparametersusedinthefunctionwhichmapsTDMAframenumberontoradiofrequencychannelaredefinedinsubclause6.2.2.Thedefinitionoftheactualmappingfunction,orasitistermed,hoppingsequencegenerationisgivenins
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