SIST EN 300 908 V6.9.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Multiplexing and multiple access on the radio path (GSM 05.02 version 6.9.1 Release 1997)
- Abstract
05.02; S31b; CR: A145; R97; 6.8.0; 6.9.0; Clarification of PBCCH message scheduling 05.02; S31b; CR: A155; R97; 6.8.0; 6.9.0; FCCH decoding problem for multislot MS
- 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
SIST EN 300 908 V6.9.1:2003 is the Slovenian adoption of ETSI EN 300 908 V6.9.1, the GSM 05.02 specification for multiplexing and multiple access on the radio path in digital cellular telecommunications system (Phase 2+). It specifies how GSM radio resources are divided into logical channels, physical channels, bursts, TDMA frames, timeslots, and frequency-hopping sequences, so engineers can map voice, data, paging, and packet signalling onto the air interface.
What does SIST EN 300 908 V6.9.1:2003 specify?
SIST EN 300 908 V6.9.1:2003 defines the radio-subsystem channel structure used for GSM900 and DCS1800 operation. The document explains the logical channels, the available physical resource, the physical burst formats, and the rules for mapping logical channels onto physical channels.
The document is organized into clauses on references and abbreviations, general principles, logical channels, physical resource, physical channels, and mapping of logical to physical channels. It also includes annexes for Phase 2 mobiles in a Phase 1 infrastructure, multislot capability, and change control history.
| Annex | What it covers |
|---|---|
| Annex A | Phase 2 mobiles in a Phase 1 infrastructure, including downlink DTX and frequency hopping options |
| Annex B | Multislot capability, including MS classes and timing constraints |
| Annex C | Change control history |
What are the key requirements of SIST EN 300 908 V6.9.1:2003?
Logical channels and their use
Clause 3 separates the radio channels into traffic channels and control channels. Traffic channels include speech, circuit-switched data, and packet data traffic channels such as TCH/F, TCH/H, and PDTCH; control channels are grouped as broadcast, common, dedicated, and cell broadcast channels.
In practice, this tells the implementer what kind of information each channel carries and whether the channel is uplink, downlink, or bidirectional. It is the basis for choosing the correct channel type for voice calls, packet transfers, paging, and access.
Physical resource, frames, and bursts
Clause 4 defines the radio-frequency resource as a split of spectrum in frequency and time. It uses radio frequency channels, cell allocation (CA), mobile allocation (MA), timeslots, TDMA frames, superframes, and hyperframes.
Clause 5 defines the burst formats used on the air interface: normal burst (NB), frequency correction burst (FB), synchronization burst (SB), dummy burst, and access burst (AB). In practice, this is what radio equipment must transmit and receive, including guard periods, training sequences, and timing structure.
Frequency hopping and channel assignment
Clause 6.2 defines the hopping sequence from CA, MA, MAIO, and HSN. It gives the rules for cyclical hopping and generated hopping, and it states that the BCCH carrier C0 does not hop on timeslots that support BCCH.
This matters when planning cells and mobile assignments, because the radio network has to choose hopping parameters that match the carrier plan and the assigned channel set. Clause 6.2.5 also covers how changes in the frequency allocation of a base transceiver station are signalled to mobiles.
Time mapping, paging, and packet access
Clauses 6.3 to 6.5 define how logical channels are placed in time on TDMA frames, including the 51-multiframe and 52-multiframe structures. They also define broadcast scheduling, paging groups, access grant blocks, packet paging, packet random access, and packet timing advance control.
These rules matter because the network uses broadcast parameters such as BS_CC_CHANS, BS_AG_BLKS_RES, BS_PA_MFRMS, BS_PBCCH_BLKS, BS_PAG_BLKS_RES, and BS_PRACH_BLKS to decide which blocks carry paging, access, and packet system information. The MS uses IMSI-based grouping to decide which paging blocks to monitor, which saves battery and keeps paging deterministic.
Multislot configurations
Clause 6.4 and Annex B cover multislot configurations for circuit-switched and packet-switched connections. They tie the allowed combinations to the multislot class of the MS and to service constraints such as timing for adjacent-cell measurements.
In practice, this is the part that tells a network whether a terminal can use multiple receive or transmit timeslots, and how much timing separation it needs between them.
What terms does SIST EN 300 908 V6.9.1:2003 define?
- TCH - Traffic channel, used for encoded speech or user data in circuit-switched mode.
- PDTCH - Packet data traffic channel, used for user data in packet-switched mode.
- BCCH - Broadcast control channel, used to broadcast general cell information.
- PBCCH - Packet Broadcast Control Channel, used to broadcast packet access parameters and packet system information.
- CCCH - Common control channel group made up of PCH, RACH, AGCH, and NCH.
- PDCH - Packet switched channel that carries only packet logical channels.
- HSN - Hopping sequence number, which selects the hopping sequence generation method.
Who uses SIST EN 300 908 V6.9.1:2003?
SIST EN 300 908 V6.9.1:2003 is used by GSM radio network engineers, BTS and MS equipment designers, test laboratories, quality teams, and network planners. They use it to assign channels, design frequency hopping, verify paging and access behaviour, and check multislot and packet-channel configurations in GSM900 and DCS1800 systems.
What changed in SIST EN 300 908 V6.9.1:2003 from the previous edition?
This publication updates Version 6.9.0 to Version 6.9.1. The change control history records clarification of PBCCH message scheduling and a correction for an FCCH decoding problem for multislot MS.
Which standards are used with SIST EN 300 908 V6.9.1:2003?
The document relies on GSM01.04 for abbreviations, GSM03.03 for numbering and identification, GSM04.03 for channel structures and access capabilities, GSM04.06 for the data link layer, GSM04.08 for layer 3 procedures, GSM05.03 for channel coding, GSM05.04 for modulation, GSM05.05 for radio transmission and reception, GSM05.08 for link control, GSM05.10 for synchronization, GSM03.64 for the GPRS radio interface overview, and GSM04.60 for GPRS RLC/MAC behaviour. These references supply the signalling, coding, modulation, and packet-access rules that this channel specification uses.
What does the SIST EN 300 908 V6.9.1:2003 document contain?
The document contains the channel definitions, burst formats, hopping algorithm, and the mapping rules that turn logical channels into physical radio usage. It also includes scheduling rules for BCCH, CCCH, PBCCH, PCCCH, PRACH, PTCCH, and paging groups, supported by clause 7 tables and figures.
Annex A gives options for filling dummy and half bursts in Phase 1 infrastructure scenarios with downlink DTX and frequency hopping. Annex B gives the multislot class tables and timing parameters used to check whether a mobile station can support a proposed configuration.
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Frequently Asked Questions
SIST EN 300 908 V6.9.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); Multiplexing and multiple access on the radio path (GSM 05.02 version 6.9.1 Release 1997)". This standard covers: 05.02; S31b; CR: A145; R97; 6.8.0; 6.9.0; Clarification of PBCCH message scheduling 05.02; S31b; CR: A155; R97; 6.8.0; 6.9.0; FCCH decoding problem for multislot MS
05.02; S31b; CR: A145; R97; 6.8.0; 6.9.0; Clarification of PBCCH message scheduling 05.02; S31b; CR: A155; R97; 6.8.0; 6.9.0; FCCH decoding problem for multislot MS
SIST EN 300 908 V6.9.1:2003 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 300 908 V6.9.1:2003 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); Multiplexing and multiple access on the radio path (GSM 05.02 version 6.9.1 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 6.9.1SIST EN 300 908 V6.9.1:2003en01-december-2003SIST EN 300 908 V6.9.1:2003SLOVENSKI
STANDARD
ETSIEN300908V6.9.1(2000-10)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);Multiplexingandmultipleaccessontheradiopath(GSM05.02version6.9.1Release1997)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 908 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)2(GSM05.02version6.9.1Release1997)ReferenceREN/SMG-020502Q6R7KeywordsDigitalcellulartelecommunicationssystem,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 300 908 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)3(GSM05.02version6.9.1Release1997)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.113.3.4.1Circuitswitcheddedicatedcontrolchannels.113.3.4.2Packetdedicatedcontrolchannels.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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)4(GSM05.02version6.9.1Release1997)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.266.5Operationofchannelsandchannelcombinations.266.5.1General.266.5.2DeterminationofCCCH_GROUPandPAGING_GROUPforMSinidlemode.276.5.3Determinationofspecificpagingmultiframeandpagingblockindex.276.5.4ShortMessageServiceCellBroadcast(SMSCB).286.5.5Voicegroupandvoicebroadcastcallnotifications.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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)5(GSM05.02version6.9.1Release1997)A.3IdleChannels.46AnnexB(normative):Multislotcapability.47B.1MSclassesformultislotcapability.47B.2Constraintsimposedbytheserviceselected.49B.3NetworkrequirementsforsupportingMSmultislotclasses.49AnnexC(informative):Changecontrolhistory.52History.53SIST EN 300 908 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)6(GSM05.02version6.9.1Release1997)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:29September2000DateoflatestannouncementofthisEN(doa):31December2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30June2001DateofwithdrawalofanyconflictingNationalStandard(dow):30June2001SIST EN 300 908 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)7(GSM05.02version6.9.1Release1997)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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)8(GSM05.02version6.9.1Release1997)2GeneralTheradiosubsystemisrequiredtosupportacertainnumberoflogicalchannelsthatcanbeseparatedintotwocategoriesasdefinedinGSM04.03:i)Thetrafficchannels(TCH's);ii)Thecontrolchannels.Moreinformationisgivenabouttheselogicalchannelsinclause3whichalsodefinesanumberofspecialchannelsusedbytheradiosub-system.Clause4ofthisdocumentdescribesthephysicalresourceavailabletotheradiosub-system,clause5definesphysicalchannelsbasedonthatresourceandclause6specifieshowthelogicalchannelsshallbemappedontophysicalchannels.Figure1depictsthisprocess.3Logicalchannels3.1GeneralThisclausedescribesthelogicalchannelsthataresupportedbytheradiosubsystem.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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)9(GSM05.02version6.9.1Release1997)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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)10(GSM05.02version6.9.1Release1997)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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)11(GSM05.02version6.9.1Release1997)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.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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)12(GSM05.02version6.9.1Release1997)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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)13(GSM05.02version6.9.1Release1997)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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)14(GSM05.02version6.9.1Release1997)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.Thisdocument,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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)15(GSM05.02version6.9.1Release1997)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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)16(GSM05.02version6.9.1Release1997)-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 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)17(GSM05.02version6.9.1Release1997)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',see3.3.2.SIST EN 300 908 V6.9.1:2003
ETSIETSIEN300908V6.9.1(2000-10)18(GSM05.02version6.9.1Release1997)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,hoppingsequencegenerationisgiveninsubclause6.2.3.6.2.2
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