GSM 協(xié)議棧設(shè)計結(jié)構(gòu)英文

41/41GSM協(xié)議棧設(shè)計結(jié)構(gòu)ArchitectureofGSMCCSummaryInGSMprotocol,bothSSprotocolandCCprotocolaresub-protocolofCMprotocol.TheCCentityusesboxtocommunicatewithAPI,MMandRR.EachCCentityshallcommunicatewiththecorrespondentpeerentityusingitsownMMconnection.ObjectModelDiagramInCCmodule,differentCCcontextneedsinterworkwithothers,soallCCcontextareorganizedinaqueue.EveryCCcontextwillmanageacall.ObjectsDescriptionThefunctionsofCCentityasfollowing:Callestablishmentprocedures;Callclearingprocedures;Callinformationphaseprocedures;Miscellaneousprocedures.DTMFmanage;Usernotification;IncallModifymanage;CRSSfunctionmanage.CCStateChartFSMstateCCstateDescribeU0CC_U0NocallexistsU01CC_U01MMConnectionpending,Thisstateexistsforamobileoriginatingcall,whenthemobilestationrequeststheestablishmentofaMMconnection.U1CC_U1CChassendSETUPCC_U3CChasreceivedCALLPROCEEDINGCC_U4CChasreceivedALERTU6CC_U6MShasreceivedSETUPU8CC_U8MShassentCONNECT.U9CC_U9MShassentCALLCONFIRMU9CC_U7MShassentALERTINGU10CC_U26MOmodifying.CC_U27MTmodifying.CC_U10Thecallactive,referU26,U27,REESET.REESETMMconnectionisdisconnectedandjustreestablishing,theCCU10.U11CC_U11Thisstateexistswhenthemobilestationhasrequestedthenetworktocleartheend-to-endconnection(ifany)andiswaitingforaresponse.U12CC_U12Thisstateexistswhenthemobilestationhasreceivedaninvitationtodisconnectbecausethenetworkhasdisconnectedtheend-to-endconnection(ifany).U19CC_U19ThisstateexistswhentheMShasrequestedthenetworktoreleaseandiswaitingforaresponse.GENEDifferentCCstatewilldosamerespondtomessagewilldealinvirtualFSMstateGENE..CallstatesatthemobilestationsideoftheinterfaceThestateswhichmayexistonthemobilestationsideoftheradiointerfacearedefinedinthisclause.NOTE: StatesU0.1,U0.2,U0.3,U0.4,U0.5,U0.6,U26,andU27areGSMspecific.AllotherstatesareITU-Tdefined.U0000000NullNocallexistsU0.1000010MMConnectionpendingThisstateexistsforamobileoriginatingcall,whenthemobilestationrequeststheestablishmentofaMMconnectionU1000001CallinitiatedThisstateexistsforamobileoriginatingcall,whentheMSrequestscallestablishmentfromthenetworkU3000011MobileoriginatingcallproceedingThisstateexistsforamobileoriginatingcallwhenthemobilestationhasreceivedacknowledgementthatthenetworkhasreceivedallcallinformationnecessarytoeffectcallestablishment.U4000100CalldeliveredThisstateexistsforamobileoriginatingcall,whenthecallingmobilestationhasreceivedanindicationthatremoteuseralertinghasbeeninitiatedU6000110Callpresentthisstateexistsforamobileterminatingcallwhenthemobilestationhasreceivedacallestablishmentrequestbuthasnotyetresponded.U7000111CallreceivedThisstateexistsforamobileterminatingcallwhenthemobilestationhasindicatedalertingbuthasnotyetansweredU8001000ConnectRequestThisstateexistsforamobileterminatingcall,whenthemobilestationhasansweredthecallandiswaitingtobeawardedthecallU9001001MobileterminatingcallconfirmedThisstateexistsforamobileterminatingcallwhenthemobilestationhassentacknowledgementthatthemobilestationhasreceivedallcallinformationnecessarytoeffectcallestablishmentU10001010ActiveThisstateexistsforamobileterminatingcallwhentheMShasansweredthecall.ThisstateexistsforamobileoriginatingcallwhentheMShasreceivedanindicationthattheremoteuserhasansweredthecallU11001011DisconnectrequestThisstateexistswhenthemobilestationhasrequestedthenetworktocleartheend-to-endconnection(ifany)andiswaitingforaresponse.U12001100DisconnectindicationThisstateexistswhenthemobilestationhasreceivedaninvitationtodisconnectbecausethenetworkhasdisconnectedtheend-to-endconnection(ifany).U19010011ReleaserequestThisstateexistswhentheMShasrequestedthenetworktoreleaseandiswaitingforaresponse.U26011010MobileoriginatingmodifyThisstateexistswhenthemobilestationhassentarequesttothenetworkforanewmodebuthasnotyetreceivedananswer.U27011011MobileterminatingmodifyThisstateexistswhenthemobilestationhasreceivedarequestfromthenetworkforanewmodeandhasnotyetsentaresponsetothisrequest.SSSummaryInGSMprotocol,SSprotocolisasub-protocolofCMprotocol.TheSSentityusesboxtocommunicatewithAPIandMM.EachSSentityshallcommunicatewiththecorrespondentpeerentityusingitsownMMconnection.ObjectModelDiagramAPIAPISS11nnMMInMS,differentSSentityneedsknowotherSSentities,soallSSentitiesareorganizedinaqueue,EverySSentitydescribesinprotocolismappedtoaSScontext.ObjectsDescriptionThefunctionsofSSentityasfollowing:SSInterrogateforLineID,CF,,CB,CW;CFregister,Erasure;CF,CBActivate,Deactivate;CBPasswordRegiste;USSDmanage.SMSSummaryNote:InGSMmode,SM_CLuseMMentitytocomminute,InGPRSmode,useMMP.SMS_CBwillperformedbyCBmodule.ObjectModelDiagramObjectsDescriptionSMSmodulewillperformthefunctionofSMRLandSMRL,itcombinetheSMSentityandGSMSentity.ASMRentitycommunicateswithASMRentityintheSMC,givetheSM_TLcapabilitytoexchangeSM_TLmessage.SMCentityisinCMsublayer,carryingSMRdata.SM_TL：SMSsendingandMEMORYAVAILABLEnotify,SMSreceivingandSTATUSREPORTreceiving,alphabetsupporting,savingmessagetoSIMandreadingmessagefromSIM,contactSMS.MMAbbreviationArfcnTheabsoluteRFchannelnumberCM ConnectionManagementCKSN CipheringKeySequenceNumberFSM FiniteStateMachineGPRS GeneralPacketRadioServiceIMSI InternationalMobileSubscriberIdentityKc CipheringkeyLAC LocationAreaCodeLAI LocationAreaIdentityLAN LocalAreaNetworkLLC LowLayerCompatibilityMM MobileManagementMMC CircuitSwitchMMMMP PacketSwitchMMOSI OpenSystemInterconnectionRR RadioResourceManagementSIM SubscriberIdentityModuleTMSI TemporaryMobileSubscriberIdentitySummaryMobilemanagementsublayerlocateinLevel3ofprotocolstack,andmiddleofLevel3。ThemainfunctionoftheMobilityManagementsublayeristosupportthemobilityofuserterminals,suchasinformingthenetworkofitspresentlocationandprovidinguseridentityconfidentiality.AfurtherfunctionoftheMMsublayeristoprovideconnectionmanagementservicestothedifferententitiesoftheupperConnectionManagement(CM)sublayer.AlltheMMproceduresdescribedinthisclausecanonlybeperformedifaRRconnectionhasbeenestablishedbetweentheMSandthenetwork.Else,theMMsublayerhastoinitiatetheestablishmentofaRRconnection.InFigure2.1.1AnoverviewoftheMMsublayerprotocolarchitectureinGSM/GPRSprotocolisgiven.Figure2.1.1ObjectModelDiagramMMsublayerincludestwoobjectsMMCandMMP.MMsublayerisaentity.ThecontactsbetweenMMentityandotherentityarefollowedinFigure2.2..1Figure2.2.1ObjectsDescriptionTheobjectMMCfulfillsthefollowingprocedure:1) MMcommonprocedures:Initiatedbythenetwork:- TMSIreallocationprocedure;- authenticationprocedure;- identificationprocedure;- MMinformationprocedure;- abortprocedure.Initiatedbythemobilestation:- IMSIdetachprocedure.ii) MMspecificprocedures: - normallocationupdatingprocedure;- periodicupdatingprocedure;- IMSIattachprocedure.iii) MMconnectionmanagementprocedures:Theseproceduresareusedtoestablish,maintainandreleaseaMMconnectionbetweenthemobilestationandthenetwork,overwhichanentityoftheupperCMlayercanexchangeinformationwithitspeer.AMMconnectionestablishmentcanonlybeperformedifnoMMspecificprocedureisrunning.MorethanoneMMconnectionmaybeactiveatthesametime.statechartMMCFiniteStateMachineismadeof7state。MMC_GENEStatedealswithsomemessagethatneedtobetreatedwithwhereasdon’ttreatedwithin6normalstate.6normalstateis:MMC_NULLinitiativestate.poweron，MMstandinthestate。MMC_IDLEidlestate，MMstartallprocedureinthestate。MMC_WRRCstatethatwaittheRRconnectionresponse.MMC_WNKRstatethatwaitthenetworkresponsemessage.MMC_CNTDMMconnected。Nolessthanoneconnectionhavebeenestablished.MMC_WNKCstatethatwaitthenetworkcommand.RRRRISXR SystemeXecutiveRealtimeFSM FiniteRRD RadioResourceDedicatedmodeRRI RadioResourceIdlemodeRRI_P RadioResourceIdlemodePLMNSelectionRRI_C RadioResourceIdlemodeCellSelectionL1 Layer1ofGSM/GPRSsystemMM MobileManagementLAP LinkAccessProtocolSummaryRRImoduleispartofRadioResourceManage,mainfunctionisresponsibleforPLMNselection,Cellselection,Cellreselection,allSystemMessagereceivedandMeasurementReportsent.It‘spositioninginGSMprotocolstackasbelow:Figure1RRI’slocationinstackObjectModelDiagramTheRRIhavetwoobjects,whichimplementdifferentfunctionswithindependentfinitestatemachine.Therelationshipbetweentwoobjects(RRI_CandRRI_P)andtheotherexternobjectsdisplaysinthefigurebelow.Figure1RRI’sOMDObjectsDescriptionTheobjectRRI_Pcompletesthefollowingfunctions:AutomaticandmanualPLMNselection.SelectdesignatedPLMN.PLMNreselectionprocedure.PLMNselectionmodesetting.ReportavailablePLMNlist.TheobjectRRI_Ccompletesthefollowingfunctions:Normalcellselection.Normalreselection.Neighbourcellsynchronizationprocedure.Plmnscanprocedure.Cellchangedinconnectedmode.AcquisitionofsysteminformationonBCCHandPBCCH.ReceivedsysteminformationonDCCH.Measurementscontrolandreporting.ForwardingofpaginginformationtoMMlayer.Sendingqualityreport.Statechartrri_PNULL:InitStaterri_PWCS:WaitforaCellfromCSel.PselhassentaSearchtoCselandiswaitingforit.rri_PCAMP:PSeliscampedonatheselectedPlmn.rri_PLTD:LimitedServicestate.rri_PNSVC:Noserviceisdetectedsleepwithaawaketimer.rri_PCONN:InConnectedModesomerestrictionforMMIfucntionapply.rri_CNULL:InitialState.rri_CRSSI:RSSImeasurementsarerequestedandResultisWaited(forinitialCellselection).rri_CSYNCHR:WaitforapossibleSynchroonaCell.L1willreportthefirstpossiblesynchrowhenfound.rri_CSVERIF:WaitforreceiveingAllSysinfoforSelectingaCell.rri_CRVERIF:WaitforreceiveingAllSysinfoforreselectiongaCell.rri_CCAMPED:CampedonaMainCell(canbeonAnycellieEmergencyonly).rri_CRESEL:CurrentservingCellisnotsuitableanymore.WaitforothercellinformationtobeabletoswitchCell.rri_CCONN:MShasengagedacircuitswicthconnexion.Reselectionisprohibitedhere.rri_CENDCO:MShasTerminatedthecircuitswicthconnexion.TrystoselecttheCellonwitchwelastwereinConnected.RRDSummaryIntheGSM/GPRSstack,RRDisunderMM,andupLAPandL1.RRDprovidesMMwithservicesofRRconnectionestablishment,managementanddatatransmitting.RRDisshortforRRindedicatedmode.RRDcommunicateswithMM,LAPandL1withmailboxesFigbelowdescribesRRD‘spositioninstackRRDinstackRRDinstackObjectModelDiagramInpractice,RRDmoduleismappedasoneRRDinstance.SeeRRDOMDFig2below.OMDofRRDOMDofRRDObjectDescriptionRRDproceduresprovidethefollowingservices:：establishment/releaseofmultiframemodeondatalinklayerconnections;transferofmessagesonanydatalinklayerconnection;indicationoftemporaryunavailabilityoftransmission(suspension,resuming);indicationoflossofRRconnectionhandovertomaintaintheRRconnection;setting/changeofthetransmissionmodeonthephysicalchannels,includingchangeoftypeofchannel,changeofthecoding/decoding/transcodingmodeandsettingofciphering;releaseofanRRconnection.StatechartWehaveastatemachineforRRDGSMmodule，andthisRRDstatemachinehas6state,asfollows：RRD_VOID：RRD'sstatewhennoconnectionisstartedorestablished.InthisstateRRDcanonlyprocessarequesttoestablishaconnectionRRD_ACCI：RRDisaccessingthe[P]CCCHchannelandwaitsforachannelallocationbythenetworkRRD_WCNI：RRDiswaitingfortheestablishmentofthelowerlayersontheinitialconnectionRRD_COND：TheconnectionisestablishedRRD_WCNN：RRDiswaitingfortheestablishmentofthelowerlayersonthenewconnectionRRD_WRLS：RRDiswaitingforthereleaseofthelowerlayersLAPABMAsynchronousBalancedModeAGCHAccessGrantChannelBCCHBroadcastControlChannelDCCHDedicatedControlChannelDLCIDataLinkConnectionIdentifierDLLDataLinkLayerFACCHFastAssociatedDCCHFSM FiniteLAPDmLinkAccessProceduresontheDmChannelPCHPagingChannelRRRadioResourceREQRequestRESResponseSACCHSlowAssociatedDCCHSAPIServiceAccessPointIdentifierSDCCHStand-aloneDCCHUAUnnumberedAcknowledgementUIUnnumberedInformationSummaryInGSM/GPRSstack,LAPisunderRR,upL1,providingreliabledatatransmittingforlayer3ondedicatedchannels.LAPhastwooperationmodes:unacknowledgedoperationusingUIframe,andacknowledgedoperationusingmultiframe.LAPcommunicateswithRRbymailbox;LAPsendmessagestoL1bysharedqueuesorpointers.L1sendmessagestoLAPbymailbox.LAP’spositioninthestackisasfollows:Figure1LAPinstackFigure1LAPinstackObjectModelDiagramLAPmoduleismappedintooneobjectwhenrealization,andithastwoinstances,SAPI0andSAPI3.LAP’sobjectmodeldiagramisasfollows.Figure2LAP’Figure2LAP’sOMDObjectsDescriptionLAPDmincludesfunctionsfor:a) theprovisionofoneormoredatalinkconnectionsonaDmchannel.Discriminationbetweenthedatalinkconnectionsisbymeansofadatalinkconnectionidentifier(DLCI);b) allowingrecognitionofframetypes;c) allowinglayer3messageunitstobepassedtransparentlybetweenlayer3entities;d) sequencecontrol,tomaintainthesequentialorderofframesacrossadatalinkconnections;e) detectionofformatandoperationalerrorsonadatalink;.f) flowcontrol;andg) contentionresolutionwhenestablishingadatalinkafteranaccessrequesthasbeenmadeontheRACH.在移動臺和基站之間為L3傳遞信息。在確認操作模式下，為確認信息傳輸建立邏輯數(shù)據(jù)鏈路連接，分為沖突解決建鏈和正常建鏈。在非確認操作模式下，提供無編號信息幀的傳遞功能。提供Dm信道上一個或者多個邏輯鏈路連接，這些連接由DLCI來區(qū)分（DLCI包括SAPI和信道類型）為收到的L3的消息提供分段功能，為收到的L1的消息提供重組功能。為確認的信息幀I幀的傳遞提供序列控制。接收信息出現(xiàn)序列錯誤時，通知對等實體重發(fā)。收到對等實體的拒絕幀后提供重發(fā)機制。在信道改變之前，可將業(yè)務(wù)掛起；切換成功后，在新信道上重建數(shù)據(jù)鏈路，并恢復(fù)業(yè)務(wù)；在信道切換失敗后，在老信道上重建數(shù)據(jù)鏈路，并恢復(fù)業(yè)務(wù)。檢測L2邏輯鏈路上的收到的幀格式。StatechartLAPmodulehasastatemachine,ithastwoinstances,sapi0andsapi3.LAPstatemachinehas8statesasfollows：LAP_IDLE：LAPDmisinidlestate,noconnectionestablished.LAP_ESTAB_SABM_SENT：AestablishSABMhasbeensent,theLAPDmiswaitingfortheanswer.LAP_MFE：TheLAPDmisinmulti-frameoperation.LAP_SUSPENDED：TheLAPDmissuspended.Forsapi0instanceonly.LAP_RESUME_SABM_SENT：AresumeSABMhasbeensent,theLAPDmiswaitingfortheanswer.Forsapi0instanceonly.LAP_RECONNECT_SABM_SENT：AreconnectSABMhasbeensent,theLAPDmiswaitingfortheanswer.Forsapi0instanceonly.LAP_TIMER_RECOVERY：TheLAPDmisintimerrecovery,waitingforACKforIframe.LAP_RELEASE_DISC_SENT：AreleaseDISChasbeensent,theLAPDmiswaitingfortheanswer.Forsapi0instanceonly.LAP_GENE:LAPDmGenericstatewhichcanhandlereceivedmessageLAP_UNIT_DATA_REQ,LAP_RX_UI_FRAME,LAP_LOCAL_RELEASE_REQ,L1_TX_IND.Statechartforlapsapi0Statechartforlapsapi3L1CAGCHAccessGrantChannelBCCHBroadcastControlChannelBTSBaseTransceiverStationFACCHFastAssociatedDCCHLAPLinkAccessProceduresNCHNotificationChannelPAGCHPacketAccessGrantChannelPCHPagingChannelPDTCHPacketDataTrafficChannelsPNCHPacketNotificationChannelPPCHPacketPagingChannelPRACHPacketRandomAccessChannelRACHRandomAccessChannelRRRadioResourceSACCHSlowAssociatedDCCHSAPIServiceAccessPointIdentifierSDCCHStand-aloneDCCHTATimingAdvanceTCH/FfullratetrafficchannelTCH/AFSadaptivefullratetrafficchannelforspeechTCH/EFSenhancedfullratetrafficchannelforspeechTCH/FSfullratetrafficchannelforspeechTCH/HhalfratetrafficchannelTCH/AHSadaptivehalfratetrafficchannelforspeechTCH/HShalfratetrafficchannelforspeechTCH/F9.6fullratetrafficchannelfor9.6kbit/suserdataTCH/F4.8fullratetrafficchannelfor4.8kbit/suserdataTCH/H4.8halfratetrafficchannelfor4.8kbit/suserdataTCH/H2.4halfratetrafficchannelfor<=2.4kbit/suserdataTCH/F2.4fullratetrafficchannelfor<=2.4kbit/suserdataTCH/F14.4fullratetrafficchannelfor14.4kbit/suserdataSummaryAmongthelayersofprotocol,theL1ClayerliesbelowtheLAPandRRsub-layers.Itisusedtotransmittheblockrequir