TETRA数字集群系统协议标准

1、ETSUROPEANELECOMMUNICATIONTANDARDETS300392-13May1997Source:ETSITC-RESICS:33.020Keywords:TETRA,V+D,protocol,SDLReference:DE/RES-06001-13TerrestrialTrunkedRadio(TETRA);VoiceplusData(V+D);Part13:SDLmodelofAirInterface(AI)ETSIEuropeanTelecommunicationsStandardsInstituteETSISecretariatPostaladdress:F-069

2、21SophiaAntipolisCEDEX-FRANCEOfficeaddress:650RoutedesLucioles-SophiaAntipolis-Valbonne-FRANCEX.400:c=fr,a=atlas,p=etsi,s=secretariat-Internet: HYPERLINK mailto:secretariatetsi.frsecretariatetsi.frTel.:+33492944200-Fax:+33493654716CopyrightNotification:Nopartmaybereproducedexceptasauthorizedbywritte

3、npermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.EuropeanTelecommunicationsStandardsInstitute1997.Allrightsreserved.Page #ETS300392-13:May1997Page ETS300392-13:May1997ContentsTOC o 1-5 h z HYPERLINK l bookmark4Foreword5 HYPERLINK l bookmark6Scope7 HYPERLINK l bookmark

4、8Normativereferences7 HYPERLINK l bookmark10Definitionsandabbreviations73.1Definitions73.2Abbreviations9 HYPERLINK l bookmark12General10 HYPERLINK l bookmark14AnnexA(normative):Protocolstackmodel11 HYPERLINK l bookmark16AnnexB(normative):MMmodel12 HYPERLINK l bookmark18AnnexC(normative):CMCEmodel13

5、HYPERLINK l bookmark20AnnexD(normative):SCLNPmodel14 HYPERLINK l bookmark22AnnexE(normative):CONPmodel15 HYPERLINK l bookmark24AnnexF(normative):MLEmodel16 HYPERLINK l bookmark26AnnexG(normative):LLCmodel17 HYPERLINK l bookmark28AnnexH(normative):MACmodel18 HYPERLINK l bookmark30History19Page ETS300

6、392-13:May1997Page #ETS300392-13:May1997BlankpagePage #ETS300392-13:May1997Page ETS300392-13:May1997ForewordThisEuropeanTelecommunicationStandard(ETS)hasbeenproducedbytheRadioEquipmentandSystems(RES)TechnicalCommitteeoftheEuropeanTelecommunicationsStandardsInstitute(ETSI).ThisETSisamulti-partstandar

7、dandwillconsistofthefollowingparts:Part1:Generalnetworkdesign;Part2:AirInterface(AI);Part3:Inter-working,(DE/RES-06001-3);Part4:Gateways,(DE/RES-06001-4);Part5:Terminalequipmentinterface,(DE/RES-06001-5);Part6:Lineconnectedstations,(DE/RES-06001-6);Part7:Security;Part8:Managementservices,(DE/RES-060

8、01-8);Part10:Supplementaryservicesstage1;Part11:Supplementaryservicesstage2;Part12:Supplementaryservicesstage3;Part13:SDLmodeloftheAirInterface(AI);Part14:PICSProforma.TranspositiondatesDateofadoption:2May1997DateoflatestannouncementofthisETS(doa):31August1997DateoflatestpublicationofnewNationalStan

9、dardorendorsementofthisETS(dop/e):28February1998DateofwithdrawalofanyconflictingNationalStandard(dow):28February1998Page ETS300392-13:May1997Page #ETS300392-13:May1997BlankpagePage ETS300392-13:May1997Page ETS300392-13:May1997ScopeThisEuropeanTelecommunicationStandard(ETS)definestheSpecificationandD

10、escriptionLanguage(SDL)modeloftheTETRAVoiceplusData(V+D)AirInterface(AI).NormativereferencesThisETSincorporatesbydatedandundatedreference,provisionsfromotherpublications.Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.Fordatedreferences,subsequenta

11、mendmentstoorrevisionsofanyofthesepublicationsapplytothisETSonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthepublicationreferredtoapplies.ETS300392-2:RadioEquipmentandSystems(RES);Trans-EuropeanTrunkedRAdio(TETRA);VoiceplusData(V+D);Part2:AirInterface.ITU-TRecom

12、mendationZ.100(1993):SpecificationandDescriptionLanguage(SDL).ISO/IEC8878:UseofX.25toprovidetheOSIconnectionmodenetworkservice.Definitionsandabbreviations3.1DefinitionsForthepurposesofthisETS,thefollowingdefinitionsapply:acknowledgeddatatransfer:Aserviceprovidedbythelayerbelowwhichgivesanacknowledge

13、mentbackovertheairinterfacefromthelowerlayerpeerentity.Thisserviceisusedbythelayer3entitiestoacquireasecuretransmissionincludingre-transmissions.AdvancedLink(AL):AnALisabi-directionalconnectionbetweenoneMobileStation(MS)andaBaseStation(BS)withprovisionofacknowledgedandunacknowledgedservicesincluding

14、windowing,segmentation,extendederrorprotectionandchoiceamongseveralthroughputs.ThedatatransferviatheALrequiresaset-upphase.announcedcellre-selection:Cellre-selectionwhereMSMobileLinkEntity(MLE)informstheSwitchingandManagementInfrastructure(SwMI)bothintheservingcellandinthenewcellthatcellchangeisperf

15、ormed.Therecanbethreetypesofannouncedcellre-selection:-type1:TheMS-MLEknowsthenewcellandthetrafficchannelallocationsonthecellbeforedecidingtoleaveitsservingcell;-type2:TheMS-MLEknowsthenewcellbeforechangingtoit,butdoesnotknowthechannelallocationonthenewcellinadvance;-type3:TheMS-MLEneednottoknowthen

16、ewcellbeforechangingtoit.TheservingcellisonlyinformedbytheMS-MLEthatitwantstochangecell.TETRAV+Dmaysupportallthreetypesofannouncedcellre-selection.attached:AnMSissaidtobeattachedtoacellwhentheMSiscampedandregisteredonthecell.TheMSmaybeinidlemode(i.e.notactivelyprocessingatransaction)orintrafficmode(

17、i.e.activelyprocessingatransactioninreceptionand/orintransmission).ItistheMobilityManagement(MM)whichdecideswhenanMSissaidtobeattached.BasicLink(BL):Abi-directionalconnectionlesspathbetweenoneorseveralMSsandaBS,withaprovisionofbothunacknowledgedandacknowledgedservicesonasinglemessagebasis.calltransa

18、ction:Allofthefunctionsassociatedwithacompleteunidirectionaltransmissionofinformationduringacall.Acallcanbemadeupofoneormorecalltransactions.Inasemi-duplexcallthesecalltransactionsaresequential.camped:AnMSissaidtobecampedonacellwhentheMSissynchronizedonthecellBSandhasdecodedtheBroadcastNetworkCHanne

19、l(BNCH)ofthecell.ThesynchronizationprocedureisperformedbytheMediumAccessControl(MAC)entityandtheinterpretationoftheNetworkinformationfromtheBNCHisperformedbyaprocedureintheMLE.ItistheMLEwhichdecideswhenanMSissaidtobecampedonacell.cellre-selection:Theactofchangingtheservingcellfromanoldcelltoanewcell

20、.Thecellre-selectionisperformedbyprocedureslocatedinMLEandintheMAC.Whenthere-selectionismadeandpossibleregistrationisperformed,theMSissaidtobeattachedtothecell.cell-id:Characterizedasthechannelnumberofthemaincarrieronthecell.confirmedservice:Aserviceprovidedbythelayerbelowwhichensuresthatamessageisr

21、espondedtobythepeerentitybeforenewmessagesareallowed.Theservicemaybeusedforsynchronizationofpeerentitiesorforprovisionofsequentialbehaviour.currentservingBS:TheBSononeofwhosechannelstheMSiscurrentlyoperating.directset-upsignalling:Asignallingprocedurewhereimmediatecommunicationcantakeplacebetweenthe

22、callingandthecalleduserswithoutthealertingprocessandwithoutanexplicitresponsefromthecalleduserthathehasanswered.initialcellselection:Theactofchoosingafirstservingcelltoregisterin.TheinitialcellselectionisperformedbyprocedureslocatedinMLEandintheMAC.Whenthecellselectionismadeandpossibleregistrationis

23、performed,theMSissaidtobeattachedtothecell.migration:Theactofchangingtoanewlocationareainanetwork(eitherwithdifferentMobileNetworkCode(MNC)and/orMobileCountryCode(MCC)wheretheuserdoesnothavesubscription,anIndividualTETRASubscriberIdentity(ITSI)forthatnetwork.monitoring:Theactofmeasuringthepowerofnei

24、ghbourcellsandcalculatethepathlossparameterC2baseduponinformationonneighbourcellsbroadcastedbytheservingcell.on/offhooksignalling:Asignallingprocedurewhichincludesanalertingprocesstothecalleduser.Thecallinguserwaitsforanexplicitresponsefromthecalleduserthathehasansweredbeforethecallcanbeset-up.recei

25、vedsegmentsequencenumber:Thenumberofthecurrentlyreceivedsegment.roaming:TheactofchanginglocationareawithinanetworkofsameMNC/MCC,andforwhichtheuserhasavalidregistration(ITSI).scanning:TheactofmeasuringthepowerofneighbourcellsandcalculatethepathlossparameterC1basedupontheinformationontheneighbourcells

26、broadcastedbytheneighbourcellsthemselves.segment:ALogicalLinkControl(LLC)segmentistheALunitoftransmissionandre-transmission.AsegmentisthenumberedpieceofaTL-SDUfittingintooneMAClayerProtocolDataUnit(PDU)(MACblock).AsegmentisasynonymtoaPDU.ServiceDataUnit(SDU)number:AnumberontheLLCentitytokeepTL-SDUsi

27、norder.servingcell:ThecellthatiscurrentlyprovidingservicestotheMS.subscriberclass:Asubscriberclasshasnootherdefinedusagethanofferingapopulationsubdivision.Theoperatordefinesthevaluesandmeaningofeachclass.surveillance:Theprocessofmonitoringthequalityoftheradiolinktotheservingcell.Page ETS300392-13:Ma

28、y1997Page #ETS300392-13:May1997Page9ETS300392-13:May1997timebase:AdevicewhichdeterminesthetimingstateofsignalstransmittedbyaBSorMS.timeslotnumber:ThetimingoftimeslotswithinaTimeDivisionMultipleAccess(TDMA)frame.TLC-SAP:ThemanagementServiceAccessPoint(SAP)isawayofmodellinglayer-to-layercommunicationf

29、ormanagementandcontrolpurpose.un-acknowledgeddatatransfer:Aservicewhichdoesnotgiveanyacknowledgementbacktotheserviceuser.unannouncedcellre-selection:Cellre-selectionwheretheMS-MLEdoesnotinformtheservingcellthatitintendtochangetoanewcell.OnlythenewcellisinformedabouttheMS-MLE.unconfirmedservice:Aserv

30、icewhichdoesnotensureresponsefrompeerentitiesbeforeallowingnewmessages.Thisimpliesthatmessagestobetransportedmayarriveindifferentorderatthepeerentity.undeclaredcellre-selection:Cellre-selectionwheretheMS-MLEdoesnotinformtheservingcellnorthenewcellthatcellchangeisperformed.validationmodel:Amodelforth

31、eprotocolspecifiedwithaformaldescriptiontechniqueinthiscase,SDL.3.2AbbreviationsForthepurposesofthisETS,thefollowingabbreviationsapply:AIAirInterfaceALAdvancedLinkBLBasicLinkBNCHBroadcastNetworkCHannelBSBaseStationCCCallControlCMCECircuitModeControlEntityCONPConnectionOrientedNetworkProtocolFCSFrame

32、CheckSequenceITSIIndividualTETRASubscriberIdentityLLCLogicalLinkControlLSLineStationMACMediumAccessControlMCCMobileCountryCodeMLEMobileLinkEntityMMMobilityManagementMNCMobileNetworkCodeMSMobileStationPCProtocolControlPDUProtocolDataUnitPSPostScriptQoSQualityofServiceSAPServiceAccessPointSCLNPSpecifi

33、cConnectionLessNetworkProtocolSDLSpecificationandDescriptionLanguageSDUServiceDataUnitSPServicePrimitiveSSSupplementaryServiceSwMISwitchingandManagementInfrastructureTDMATimeDivisionMultipleAccessTETRATerrestrialTrunkedRAdioTL-SDUSDUfromtheserviceuser(i.e.MLE)TLAAlayer2serviceaccesspoint(TLA-SAP)TLB

34、Alayer2serviceaccesspoint(TLB-SAP)TLCAlayer2serviceaccesspoint(TLC-SAP)TM-SDUSDUfromthelayeraboveMAC(i.e.LLC)V+DVoiceplusDataGeneralTheSpecificationandDescriptionLanguage(SDL)modeldefinedinthisETSistheTETRAV+DMS.ThemodelisbasedonthedescriptiongiveninETS300392-21.EventhoughsomeLineStation(LS)function

35、alityhasbeengiveninETS300392-21theyhavenotbeendefinedintheSDLmodel.SpecificationofconcurrentservicesfortheTETRAprotocolstackisoutsidethescopeofthisETS.IncasethereareanyconflictsbetweentheSDLmodelandETS300392-21,thetextualspecificationshallbetakenasthecorrectdescriptioninsteadoftheSDLmodel.Duetothefa

36、ctthatSDLisnotsuitableforbitexactdatadescription,thereisnodatadescriptiongiveninthisETS.ThenamesofthesignalsandtheparametersarethesameasinETS300392-21wheretheuseofSDLdescribedinITU-TRecommendationZ.1002haspermittedit.TheSDLmodelinthisETSiscreatedfromtheSDLvalidationmodelofTETRAV+Dleavingoutdetailedd

37、escriptionsthatwerenecessaryforvalidationpurposesonly.GenerallyonlySDLblocksandprocessesoftheTETRAMSvalidationmodelhavebeenincluded.SDLprocedureshavebeenincludedinthemodelincasethereisanon-trivialfunctionalityinaprocedurethatisnotobviousfromthenamingoruseoftheprocedure.Generally,eachoftheSDLprotocol

38、entitiesoftheTETRAMShasbeenbuiltoftwomainparts:-theprotocolpart;and-theformatterpart;convertingPDUstoN-1ServicePrimitives(SPs).TheprotocolpartoftheSDLmodelshandlesthemainfunctionalityoftheentity.ItcontainsthehandlingofSAPsabovetheprotocolentityandPDUinterfacetothenextlowerprotocolentity.Theformatter

39、partoftheSDLmodelshandlestheconversionbetweenthePDUsoftheprotocolentityandSPsoftheSAPsofthenextlowerserviceinterface.NOTE1:Thenamingoftheformatterpartmayvary,e.g.inCircuitModeControlEntity(CMCE)theSDLprocessdefiningtheformatterpartiscalledProtocolControl(PC).DuetothenumberofpagesintheSDLspecificatio

40、noftheMStheactualSDLspecificationdiagramsaredistributedinanelectronicversionwhichaccompanythisETS.NOTE2:ThePostScript(PS)filesthatarereferencedinthisETSarepackedintoanarchivenamed392d_e1.lzh.Otherfileformatsareavailableonrequest.ForeachprotocolentitythereareseveralPSfiles.AnnexAcontainsreferencestot

41、hePSfilesforthestackmodel,whileeachofthefollowingannexes(annexesBtoH)describesasingleprotocolentityandtheirreferencestothefilesonthediskette.InadditiontoreferencestotheSDLdiagramsandPSfiles,theannexesalsocontaininformationonthespecificprotocolmodel.Page #ETS300392-13:May1997Page ETS300392-13:May1997

42、AnnexA(normative):ProtocolstackmodelSAPsatthetopofTETRAMSprotocolstackaretheonesthataredefinedforMobilityManagement(MM),CMCE,SpecificConnectionlessNetworkProtocol(SCLNP)andConnectionOrientedNetworkProtocol(CONP)entitiesinETS300392-21.TheSupplementaryServices(SS)SAPaboveCMCEhasnotbeenincludedinthemod

43、elsinceitisoutsidethescopeofETS300392-21.ThereforetheSSSAPisnotvisibleintheblockstructureofthestackmodel.ThedefinitionsoftheSDLsignallistsvisibleinthestackblockstructurecanbefoundintheprotocolentityblockstructurediagramsoftheSDLmodels,describedinthefollowingannexes.TableA.1givesthedescriptivenameand

44、filenameoftheSDLmodel.TableA.1:TETRAMSstackmodelfileDescriptivenameFilenameTETRAMSstackblockstructuretetra.psPage ETS300392-13:May1997Page #ETS300392-13:May1997AnnexB(normative):MMmodelTheSDLmodelinthisETSofthetextualMMprotocolspecificationasdefinedinclauses15and16ofETS300392-21,coversallmandatoryre

45、quirementsandsomeoptionalfeatures.FortheSDLmodelitisassumedthattheMMserviceusersbehaveaccordingtothetheirdefinedfunctionality.ThatmeansthattheSDLoftheMMisnotrobusttooperationsnotrequiredinthetextualprotocolspecification.TheSDLmodelhasbeenstructuredinaccordancewiththearchitecturedefinedfortheMMfuncti

46、onalentitiesinthetextualprotocolspecification,anditfollowsthestatesandsignalbehaviourintheSDLdiagramfromETS300392-21,clause15.TableB.1givesthedescriptivenamesandfilenamesoftheSDLmodel.TableB.1:MMfilesDescriptivenameFilenameMMblockstructuremmblock.psMMProtocolmmproto.psMMFormattermmform.psPage #ETS30

47、0392-13:May1997Page ETS300392-13:May1997AnnexC(normative):CMCEmodelTheSDLmodelinthisETSofthetextualCMCEprotocolspecificationasdefinedinclauses11,13and14ofETS300392-21,coversallmandatoryrequirementsandsomeoptionalfeatures.TheSDLmodelcanonlyhandleoneinstanceofCallControl(CC)evenifitisspecifiedinETS300

48、392-21thattheremayexistmultipleinstancesofTNCC-SAPrunningatthesametime.FortheSDLmodelitisassumedthattheCMCEserviceusersbehaveaccordingtothetheirdefinedfunctionality.ThatmeansthattheSDLoftheCMCEisnotrobusttooperationsnotrequiredinthetextualprotocolspecification.TheinterfacetoPCusesinternalsignallingf

49、orthelayer2SPs,sentbeforetheactualCMCEPDU.TheSDLmodelhasbeenstructuredinaccordancewiththearchitecturedefinedfortheCMCEfunctionalentitiesinthetextualprotocolspecification.TheSDLmodelfollowsthestatesandsignalbehaviourdescribedinthediagramsfromETS300392-21,clause14.ForthehandleofcollidingcallsaCOLLIDIN

50、G_CALLstateisadded.TableC.1givesthedescriptivenamesandfilenamesoftheSDLmodel.TableC.1:CMCEfilesDescriptivenameFilenameCMCEblockstructurecmceblk.psCMCECallControlcmcecc.psCMCEShortDataServicescmcesds.psCMCEProtocolControl(formatter)cmceform.psPage ETS300392-13:May1997Page #ETS300392-13:May1997AnnexD(

51、normative):SCLNPmodelThismodelofSCLNPexpectsthattheserviceuseraboveSCLNPisconformanttoETS300392-21.ThismeansthattheserviceusershallnotuseserviceprimitivesagainsttheprotocolasdescribedinETS300392-21,clauses26and27.AllofthemandatorySCLNPfunctionswhichcanbeappliedtoMSsgivenintheETS300392-21,subclause27

52、.7,areimplementedinthisSDLmodel.Priorityhandlingandsub-addressingislimitedtocopyingthevaluesbetweenserviceprimitivesandthecorrespondingPDUs.MandatoryforwardPDUfunctionislimitedtosendingallSCLNPpacketstoMLE.TheQualityofService(QoS)informationpassingfromtheprotocolprocesstotheformatterprocessishandled

53、usingSDLremotevariables.AllothercommunicationbetweenthetwoprocessesishandledviathePDUrouteinthismodel.TheoptionalSCLNPpacketre-transmissionhasbeenspecifiedintheSDLmodel.InETS300392-21,subclauses.3to.6,itisdefinedthatSCLNPmayre-transmitpacketswhichhavenotyetbeensuccessfullytransferred

54、toSwMI.InthismodelofSCLNPthere-transmissioncoversthelatestpacketsenttoMLEafterMLE-CLOSEandMLE-OPENindicationsequence.AnSDLBooleanconstantcalledSCLNP_RESENDS_AFTER_CLOSEcontrolswhethertousethisfunctionalityornot.TableD.1givesthedescriptivenamesandfilenamesoftheSDLmodel.TableD.1:SCLNPfilesDescriptiven

55、ameFilenameSCLNPblockstructuresclnpblk.psSCLNPProtocolsclnppro.psSCLNPFormattersclnpfor.psPage #ETS300392-13:May1997Page ETS300392-13:May1997AnnexE(normative):CONPmodelThemodelofCONPexpectsthattheserviceuseraboveCONPisconformanttoETS300392-21.Itmeansthattheserviceusershallnotuseserviceprimitivesagai

56、nsttheprotocolasdescribedinETS300392-21,clauses24and25.TheSDLmodelisonlyamodeloftheState/EventtableoftheX.25describedinISO/IEC88783.ItshowstheuseoftheTETRAAirInterfacelayer2.TableE.1givesthedescriptivenamesandfilenamesoftheSDLmodel.TableE.1:CONPfilesDescriptivenameFilenameCONPblockstructureconpblk.p

57、sCONPProtocolconpprot.psCONPFormatterconpform.psPage ETS300392-13:May1997Page #ETS300392-13:May1997AnnexF(normative):MLEmodelTheSDLmodelinthisannexofthetextualMLEprotocolspecificationasdefinedinclauses17and18ofETS300392-21,coversallmandatoryrequirementsandsomeoptionalfeatures.Theoptionalfeaturesspec

58、ifiedintheSDLmodelarethetype1andtype2cellre-selectionprocedures.Asimplespecificationoftheinitialcellselectionprocedureisalsogiven.Thisprocedurehowevershouldnotbeseenasputtinganyfurtherrequirementsonotherpossibleconforminginitialcellselectionprocedures.Furthermore,onlyaverysimplecriterionfunctionfori

59、nitiatinganycellre-selectionprocedurehasbeenspecified.AlsotheQoSnegotiationpossibleduringtheALserviceset-upphaseisspecifiedinverylittledetail.ThereisnobufferingmechanismspecifiedintheSDLmodel.SoeachMLEserviceusercanhaveonlyoneMLEservicerequestinprogressatatime.FortheSDLmodelitisassumedthattheMLEserv

60、iceusersbehaveaccordingtothetheirdefinedfunctionality.ThismeansthattheSDLspecificationoftheMLEisnotrobusttooperationsnotrequiredinthetextualprotocolspecification.TheSDLmodelhasbeenstructuredinaccordancewiththearchitecturedefinedfortheMLEfunctionalentitiesinthetextualprotocolspecification.Forsomeofth