SIST EN 300 949 V6.1.1:2003

• Abstract:

  Upgrade from Phase 2+ to Release 1997

• 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
• Mandate: UIC
• Ref Project: ETSI EN 300 949 V6.1.1 (2000-01) - Digital cellular telecommunications system (Phase 2+) (GSM); Broadcast Call Control (BCC) protocol (GSM 04.69 version 6.1.1 Release 1997)

Overview

SIST EN 300 949 V6.1.1:2003 outlines the Broadcast Call Control (BCC) protocol for the Digital Cellular Telecommunications System (GSM Phase 2+), specifically as delivered in GSM 04.69 version 6.1.1 from Release 1997. Published by the Slovenian Institute for Standardization (SIST), this standard is identical to the European EN 300 949 standard developed by ETSI. The BCC protocol underpins the Voice Broadcast Call Service (VBCS), supporting group and broadcast communication within GSM networks.

The upgrade from Phase 2+ to Release 1997 included enhanced network features, improved call control states, and standardized procedures for broadcast call establishment, maintenance, and termination. This document is essential for professionals developing or maintaining GSM network infrastructure, mobile stations, or telecommunications software that must ensure compatibility and interoperability across digital cellular networks.

Key Topics

• Broadcast Call Control (BCC) Protocol: Defines the signaling necessary to establish, manage, and terminate voice broadcast calls over the GSM radio interface, enabling communications to multiple mobile stations within specified network regions.
• BCC Protocol States:
  • Both the mobile station (MS) and network employ sets of finite states, including states for initiation, active call, call presence, connection requests, and termination.
  • State transitions are driven by message exchanges and interactions with other protocol layers.
• Message Procedures:
  • Procedures for call setup (network- and mobile-originated), call release, abortion and termination.
  • Use of messages such as SETUP, CONNECT, TERMINATION, STATUS, and GETSTATUS to control call flows.
• Parameter Management:
  • Attributes and configuration parameters in the mobile station determine originator role, communication enablement, and user connection states for uplink/downlink.
  • Protocol includes functions for consistency checks and adaption of parameters as the call progresses.
• Error Handling:
  • Mechanisms for handling unknown, unforeseen, and erroneous protocol data to improve robustness and future extensibility.
  • Defined responses for invalid states, transaction identifiers, information elements, or message contents.
• Interoperability:
  • Ensures harmonized behavior of mobile stations and network elements from multiple vendors, helping operators to maintain effective broadcast communication.

Applications

• Network Infrastructure:
  • Implementation of BCC protocol in GSM core and radio access network equipment assures correct support for broadcast and group call services, such as public safety dispatch.
• Mobile Device Development:
  • Mobile stations (handsets, embedded modules) rely on BCC-compliant firmware to participate in or initiate broadcast calls in GSM networks, with relevance for both commercial and government applications.
• Public Safety and Emergency Services:
  • Broadcast call features enabled by the BCC protocol support critical communications scenarios, such as emergency alerts or group dispatch capabilities for first responders.
• System Integration and Compatibility Testing:
  • Ensures that upgrades to GSM networks or devices maintain coexistence with legacy systems as well as interoperability between equipment from different vendors.

Related Standards

Organizations developing solutions in accordance with SIST EN 300 949 V6.1.1:2003 should reference additional GSM and telecommunications standards, including:

• GSM 02.69: Voice Broadcast Call Service (VBCS) - service description.
• GSM 03.03: Numbering, addressing, and identification in GSM networks.
• GSM 04.07 & GSM 04.08: General protocol aspects and radio interface signaling for Layer 3.
• GSM 04.06: Mobile Station-Base Station System interface Data Link layer.
• GSM 03.67: Enhanced Multi-Level Precedence and Pre-emption service (eMLPP).
• GSM 03.69/04.68: Group Call Services.

By adhering to SIST EN 300 949 and its related protocols, GSM service providers and equipment manufacturers can deliver enhanced, reliable broadcast call capabilities, supporting both commercial and mission-critical communication requirements.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.NUPLOMHQMDDigital cellular telecommunications system (Phase 2+) (GSM); Broadcast Call Control (BCC) protocol (GSM 04.69 version 6.1.1 Release 1997)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 949 Version 6.1.1SIST EN 300 949 V6.1.1:2003en01-december-2003SIST EN 300 949 V6.1.1:2003SLOVENSKI
STANDARD
ETSIEN300949V6.1.1(2000-01)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);BroadcastCallControl(BCC)protocol(GSM04.69version6.1.1Release1997)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)2(GSM04.69version6.1.1Release1997)ReferenceREN/SMG-030469Q6R1KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]Ideliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)3(GSM04.69version6.1.1Release1997)ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.63.1Definitions.63.2Abbreviations.74Applicability.75Mainconcepts.76ElementaryproceduresforBroadcastCallControl.86.1Overview.86.1.1General.86.1.2Broadcastcallcontrolstates.86.1.2.1BroadcastcallcontrolstatesattheMSsideoftheinterface.86.1.2.1.1AttributesandParametersofBCCintheMS.86.1.2.1.2NULL(U0).96.1.2.1.3MMCONNECTIONPENDING(U0.p).96.1.2.1.4BROADCASTCALLINITIATED(U1).96.1.2.1.5BROADCASTCALLACTIVE(U2).96.1.2.1.6BROADCASTCALLPRESENT(U3).96.1.2.1.7BROADCASTCALLCONNECTIONREQUESTED(U4).96.1.2.1.8TERMINATIONREQUESTED(U5).96.1.2.1.9RECEIVEMODEACTIVE(U6).96.1.2.1.10BCCTIMERSINTHEMS.106.1.2.1.11CONSISTENCYOFPARAMETERSANDSTATES.106.1.2.2BROADCASTCALLCONTROLSTATESATTHENETWORKSIDEOFTHEINTERFACE.106.1.2.2.1NULL(StateN0).106.1.2.2.2BROADCASTCALLINITIATED(N1).106.1.2.2.3BROADCASTCALLACTIVE(N2).116.1.2.2.4BROADCASTCALLESTABLISHMENTPROCEEDING(N3).116.1.2.2.5TERMINATIONREQUESTED(N4).116.2Proceduresforestablishmentofabroadcastcall.116.2.1Activationofabroadcastcallbythenetwork.116.2.2Mobileoriginatedestablishment.116.2.2.1Terminationduringmobileoriginatedestablishment.126.2.2.2Abnormalcases.126.2.3MobileterminatingbroadcastcallestablishmentintheMS.126.3Proceduresduringtheactivestateandreceivemodeactivestateofabroadcastcall.126.3.1Mobilestationproceduresintheactivestate.126.3.2Networkproceduresintheactivestate.136.3.3MobilestationproceduresintheRECEIVEMODEACTIVEstate.136.4Proceduresforrelease,abortion,andterminationofabroadcastcall.136.4.1Terminationprocedure.136.4.2Abortandreleaseprocedures.146.5Miscellaneousprocedures.146.5.1Statusprocedures.146.5.1.1Getstatusprocedure.146.5.1.2Setparameterprocedure.147Handlingofunknown,unforeseen,anderroneousprotocoldata.147.1General.147.2Messagetooshort.157.3Unknownorunforeseentransactionidentifier.15SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)4(GSM04.69version6.1.1Release1997)7.4Unknownorunforeseenmessagetype.157.5Non-semanticalmandatoryinformationelementerrors.157.6Unknownandunforeseeninformationelementsinthenon-imperativemessagepart.167.6.1Informationelementsunknowninthemessage.167.6.2Outofsequenceinformationelements.167.6.3RepeatedInformationelements.167.7Non-imperativemessageparterrors.167.7.1SyntacticallyincorrectoptionalInformationelements.167.8Messageswithsemanticallyincorrectcontents.168Messagefunctionaldefinitionsandcontents.168.1CONNECT.178.2GETSTATUS.188.2.1mobileidentity.188.3IMMEDIATESETUP.188.3.1Mobileidentity.198.4SETPARAMETER.198.5SETUP.198.6STATUS.208.6.1Callstate.208.6.2Stateattributes.208.7TERMINATION.218.8TERMINATIONREJECT.218.9TERMINATIONREQUEST.219Contentsofinformationelementsvalueparts.229.1ProtocolDiscriminator.229.2Transactionidentifier.229.3MessageType.229.4Otherinformationelements.229.4.1CallReference.239.4.2Callstate.239.4.3Cause.249.4.4Originatorindication.259.4.5SpareHalfOctet.269.4.6Stateattributes.26AnnexA(informative):ChangeRequestHistory.27History.28SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)5(GSM04.69version6.1.1Release1997)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbytheSpecialMobileGroup(SMG).ThepresentdocumentspecifiestheBroadcastCallControl(BCC)protocolwithinthedigitalcellulartelecommunicationssystem(Phase2+).ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version6.x.ywhere:6indicatesRelease1997ofGSMPhase2+.xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:31December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)6(GSM04.69version6.1.1Release1997)1ScopeThepresentdocumentspecifiestheBroadcastCallControl(BCC)protocolusedbytheVoiceBroadcastCallService(VBCS)ontheradiointerface.2ReferencesThefollowingdocumentscontainprovisionswhich,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]GSM02.69):"Digitalcellulartelecommunicationssystem(Phase2+);VoiceBroadcastCallService(VBCS)stage1".[3]GSM03.03:"Digitalcellulartelecommunicationssystem(Phase2+);Numbering,addressingandidentification".[4]GSM03.67:"Digitalcellulartelecommunicationssystem(Phase2+);enhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP)-Stage2".[5]GSM03.69:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceBroadcastCallService(VBCS)stage2".[6]GSM04.06:"Digitalcellulartelecommunicationssystem(Phase2+);MobileStation-BaseStationSystem(MS-BSS)interfaceDataLink(DL)layerspecification".[7]GSM04.07:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacesignallinglayer3Generalaspects".[8]GSM04.08:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacelayer3specification".3Definitionsandabbreviations3.1DefinitionsDefinitionsusedinthepresentdocumentarealsodefinedinGSM02.69.Forthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply.Attachmentoftheuserconnection:SeeGSM04.08,subclause5.2.Broadcastcallchannel:Downlinkchanneltobeallocatedineachcellofthegroupcallareaforaparticularbroadcastcall.AllMSsofthelisteningservicesubscribersinonecellshalllistentothecommondownlink.SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)7(GSM04.69version6.1.1Release1997)Broadcastcall:Isusedinthesamesenseas"voicebroadcastcall".Callinguser:BCCentityintheMobileStation(MS)initiatingorhavinginitiatedabroadcastcall.Clearingthecontextrelatedtothebroadcastcallestablishment:allrunningBCCtimersintherelevantBCCentityarestopped,allattributesintherelevantBCCentityaredeleted.Downlink:NetworktoMSdirection.Groupreceivemode:SeeGSM04.08.Originatingmobilestation:MSinitiatingorhavinginitiatedthebroadcastcall.Uplink:Mobilestationtonetworkdirection.3.2AbbreviationsAbbreviationsusedinthepresentdocumentarealsolistedinGSM01.04.Forthepurposesofthepresentdocument,thefollowingabbreviationapplies:BCCBroadcastCallControl.4ApplicabilitySupportofthebroadcastcallprotocolisoptionalintheMSandinthenetwork.5MainconceptsThepresentdocumentdescribesthebroadcastcallcontrol(BCC)protocol,whichisoneoftheprotocolsoftheConnectionManagement(CM)sublayer(seeGSM04.07).ThereisingeneralmorethanoneMSengagedinabroadcastcall.Consequently,thereisingeneralmorethanoneMSwithaBCCentityengagedinthesamebroadcastcall,andthereisoneBCCentityinthenetworkengagedinthatbroadcastcall.UnderwhichconditionsaBCCmessageispassedfromlower(sub-)layerstotheBCCentityisdefinedinthespecificationsofthesub-layers.TheMSshallignoreBCCmessagesthatitreceiveswhichweresentinunacknowledgedmodeandwhichexplicitlyspecifyasdestinationamobileidentitywhichisnotamobileidentityoftheMS.HigherlayersandtheMMsub-layerdecidewhentoacceptparallelBCCtransactionsandwhen/whethertoacceptBCCtransactionsinparalleltootherCMtransactions.Thebroadcastcallmaybeinitiatedbyamobileuserorbyadispatcher.Specificationofaprotocolfordispatchersisoutofthescopeofthepresentdocument.Hence,inthescopeofthepresentdocument,thereare:-oneBCCentityinthenetwork;and-oneormorethanoneBCCentitiesindifferentMSsengagedinabroadcastcall,andoneorenoneoftheMSsistheoriginatorofthebroadcastcall(calledtheoriginatingMSinthepresentdocument).NOTE:WhereasfortheGroupCallControl(GCC)protocol(seeGSM04.68),incertainsituations,theGCCentityinaMSassumestobetheoriginatorofabroadcastcallwithoutbeingtheoriginator,thisisnotthecasefortheBCCprotocol.SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)8(GSM04.69version6.1.1Release1997)TheoriginatoroftheBCCtransactionchoosestheTransactionIdentifier(TI).AMSnotassumingtobetheoriginatorofthetransactionwillchosethetransactionidentifierreceivedfromthenetwork,settingtheTIflagto1+xmod2wherexisthereceivedTIflag.Thepresentdocumentdescribesthebroadcastcallcontrolprotocolonlywithregardtotwopeerentities,oneinaMS,theotheroneinthenetwork.Thecallcontrolentitiesaredescribedascommunicatingfinitestatemachineswhichexchangemessagesacrosstheradiointerfaceandcommunicateinternallywithotherprotocol(sub)layers.Inparticular,theBCCprotocolusestheMMandRRsublayerspecifiedinGSM04.08.TheBCCentityinaMSthatisnottheoriginatorofthebroadcastcallshallnotsendmessagestoitspeerentity.Thisdescriptioninonlynormativeasfarastheconsequentialexternallyobservablebehaviourisconcerned.Forsimplicity,insteadofusingtheterms"BCCentityintheMS"and"BCCentityinthenetwork",thepresentdocumentoftenusestheterms"MS"and"network"ifnoconfusionmayarise.Certainsequencesofactionsofthetwopeerentitiescompose"elementaryprocedures"whichareusedasabasisforthedescriptioninthepresentdocument.Theseelementaryproceduresaredefinedinclause6.ThenetworkshouldapplysupervisoryfunctionstoverifythattheBCCproceduresareprogressingandifnot,takeappropriatemeanstoresolvetheproblems.This,however,isoutofthescopeofthepresentdocument.6ElementaryproceduresforBroadcastCallControl6.1Overview6.1.1GeneralTheelementaryproceduresmaybebroadcastedintothefollowingclasses:-broadcastcallestablishmentprocedures;-broadcastcallterminationprocedures;-broadcastcallinformationphaseprocedures;-miscellaneousprocedures.6.1.2Broadcastcallcontrolstates6.1.2.1BroadcastcallcontrolstatesattheMSsideoftheinterfaceTheBCCentityoftheMSisdescribedasanextendedfinitestatemachine.Itperformstransitionsbetweenstates.Ithascertainparametersandattributes,e.g.configurationparametersandbehaviourparameters,whichitsetsandchangesbasedoninteractionwithhigherandlower(sub-)layersandonmessageexchangewithitspeerentity.Ifaconfigurationparameterissettoacertainvalue,theMSshallalsoadapttheconfigurationaccordingly.Behaviourparametersdecideon(partof)thebehaviouroftheBCCentity.WhentheBCCentityintheMSreceivesamessage,itshallfirstanalysewhetheritshallignorethemessage,seeclauses5and7.6.1.2.1.1AttributesandParametersofBCCintheMSForthefollowingbehaviourparameters,thedescriptionisinformative.ParameterDescriptionORIGDependingonthecontext,theMSassumestobetheoriginatorofthecall(ORIG=T)ornottobetheoriginatorofthecall(ORIG=F).COMMDependingonthecontext,theMSassumesthatcommunicationwithitspeerentityisenabledinbothdirections(COMM=T)ornot(COMM=F).SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)9(GSM04.69version6.1.1Release1997)ForthefollowingconfigurationparameterstheMSshalladaptitsconfigurationaccordingtotheparametervalueandparameterdefinition.ParameterDefinitionD-ATTD-ATT=TmeansthattheMSattachestheuserconnectionforthebroadcastcallinthedownlink.D-ATT=FmeansthattheMSdoesnotattachtheuserconnectionforthebroadcastcallinthedownlink.U-ATTU-ATT=TmeansthattheMSattachestheuserconnectionforthebroadcastcallintheuplink.U-ATT=FmeansthattheMSdoesnotattachtheuserconnectionforthebroadcastcallintheuplink.6.1.2.1.2NULL(U0)NobroadcastcallexistsfortheBCCentity.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.3MMCONNECTIONPENDING(U0.p)TheBCCentityhasrequestedtheexplicitestablishmentofanMMconnection.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.4BROADCASTCALLINITIATED(U1)TheBCCentityhasrequestedthepeerentityinthenetworktoestablishabroadcastcall.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=T,D-ATT=F,U-ATT=F.6.1.2.1.5BROADCASTCALLACTIVE(U2)Thebroadcastcallisestablishedatleastinonecell.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=T,D-ATT=T,U-ATT=T.6.1.2.1.6BROADCASTCALLPRESENT(U3)TheMShasreceivedanotificationaboutanongoingbroadcastcall.Higherlayersarerequestedtoacceptorrejectthecall.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.7BROADCASTCALLCONNECTIONREQUESTED(U4)TheMShasreceivedanotificationaboutanongoingbroadcastcall.Higherlayershavedecidedtoacceptthecall.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.8TERMINATIONREQUESTED(U5)TheMSwhichistheoriginatorofthebroadcastcallhasbeeninstateU1orU2andhassentaTERMINATIONREQUESTmessagetothenetwork.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=T,D-ATT=T,U-ATT=T.6.1.2.1.9RECEIVEMODEACTIVE(U6)TheBCCentityintheMSinstateU4,BROADCASTCALLCONNECTIONREQUESTED,hasgotanindicationfromlower(sub-)layersthatRRhasenteredgroupreceivemode(seeGSM04.08).Whenenteringthestate,parametersshallSIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)10(GSM04.69version6.1.1Release1997)besettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=T,U-ATT=F.6.1.2.1.10BCCTIMERSINTHEMSTable6.1specifiesthetimersusedinBCC.Thedenotationofcolumnsisdefinedasfollows:timer::=nameofthetimer;set::=underwhichconditionsthetimerisset(i.e.,started);stopped::=underwhichconditionsthetimerisstopped;runninginstate(s)::=inwhichstate(s)thetimermayberunning;actionatexpiry::=whichactionstheBCCentityshallperformatexpiry;value::=thedurationbetweensettingthetimerandexpiryofthetimer("s"denotes"second(s)""xx-yy"meansthatanyvaluebetweenxxandyyispermitted).Table6.1:SpecificationoftimersusedinBCCtimersetstoppedrunninginstate(s)actionatexpiryvalueTnochannelinstateU6onreceiptofanindicationfromlower(sub-)layersthatnochanneliscurrentlyavailablewhenleavingU6orwhenreceivinginU6anindicationfromlower(sub-)layersthatachannelisavailableinU6,dependingonfurtherconditionsseesubclause6.3.13sTMM-estwhenenteringU0.pusingtheset-upprocedurewhenenteringU1usingtheimmediateset-upprocedurewhenleavingU0.porU1U0.p,U1seesubclause6.2.15sTtermwhensendingaTERMINATIONREQUESTwhenreceivingaTERMINATIONorTERMINATIONREJECTU5abortbroadcastcall10sTconnreqwhenenteringstateU4whenleavingstateU4U4abortbroadcastcall10-30s6.1.2.1.11CONSISTENCYOFPARAMETERSANDSTATESTheMSshallconsiderthefollowingparametervaluesasinconsistentwiththestateorsub-state:ORIG=TisinconsistentwithstatesU3,U4,andU6.COMM=TisinconsistentwithstatesU0,U3,U4,andU6.AllothervaluesofparametersORIG,COMM,D-ATT,andU-ATTshallnotbeconsideredbytheMSasinconsistentwithastate.6.1.2.2BROADCASTCALLCONTROLSTATESATTHENETWORKSIDEOFTHEINTERFACE6.1.2.2.1NULL(StateN0)NobroadcastcallexistsfortheBCCentity.6.1.2.2.2BROADCASTCALLINITIATED(N1)TheBCCentityhasreceivedtheindicationthatapeerentityinaMSwantstoestablishabroadcastcallforacertainbroadcastidentity.SIST EN 300 949 V6.1.1:2003

ETSIETSIEN300949V6.1.1(2000-01)11(GSM04.69version6.1.1Release1997)6.1.2.2.3BROADCASTCALLACTIVE(N2)Thebroadcastcallisestablishedinatleastonecell;theremaybeaMSwhichhasseizedtheuplinkornot;theremaybetalkingdispatchersornot.6.1.2.2.4BROADCASTCALLESTABLISHMENTPROCEEDING(N3)TheBCCentitywantstoacceptthebroadcastcall,hasinitiatedestablishmentofcorrespondingbroadcastcallchannels,and,ifthereisacallinguser.hassentaCONNECTmessagetothecallinguser.6.1.2.2.5TERMINATIONREQUESTED(N4)TheBCCentityhasaskedlowersub-layerstoterminatethebroadcastcallinallcellsandwaitsforaconfirmationthatthebroadcastcallhasbeenterminatedinallcells.6.2Proceduresforestablishmentofabroadcastcall6.2.1ActivationofabroadcastcallbythenetworkTheBCCentityinthenetworkmayinitiatetheactivationofabroadcastcallwithacertainbroadcastcallreferenceandpriorityinalistofcellsbyaskinglowerlayerstoestablishthebroadcastcallwiththatbroadcastcallreferenceandpriorityinthosecells.Itthenwaitsuntilitisinformedbylower(sub-)layersthatresourceactivationwassufficientlysuccessful,andentersstateN2,BCACTIVE,6.2.2MobileoriginatedestablishmentHigherlayersintheMSmayasktheBCCentityinstateU0,NULL,toestablishabroadcastcall,eitherusingtheimmediateset-upprocedureorusingtheset-upprocedure.Therequestcontainsagroup-idandmaycontainapriorityindication.Onrequestofhigherlayerstoestablishabroadcastcallusingtheset-upprocedure,theBCCentityoftheMSbuildsanappropria
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