西门子通讯 3GPP IP多媒体子系统标准化介绍(PPT 33页)

3GPPIP多媒体子系统(IMS)标准化介绍无线通信技术委员会第一次全会WG2#1会议北京2003.8.27-29来源：冯勤西门子公司无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page2内容IMS概述3GPP组织结构IMSRelease5规范IMSRelease6研究总结无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page33GPPRelease99网络结构PSTN/ISDNRadioAccessNetworkInterworkedNetworkGSMBaseStationSystemBTSBSCPSTN/ISDNCircuitSwitched(CS)domainotherPLMNASCPHLRCAPCoreNetworkGbGPRSbackboneIPtransportPacketSwitched(PS)domainGGSNGnInternetIntranetMSC-VLRSGSNG-MSCMAPMAPMAPCAPSMSSCGpGiUMTSTerrestrialRadioAccessNetworkNodeBRNCIuPSIuCS无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page43GPPRelease4–电路交换域中实现呼叫控制与传输的分离IPorATMtransportAccessNetworkInterworkedNetworkPSTN/ISDNCircuitSwitched(CS)domainotherPLMNSCPHLRCoreNetworkMSCserverNodeBRNCUTRANIuCSG-MSCserverBICCMAPCAPMGWCS-MGWH.248/MEGACObasedH.248/MEGACObasedGSMBaseStationSystemBTSBSCA无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page53GPPRelease5–分组交换域结构InternetAccessNetworkInterworkedNetworkGSMBSSBTSBSCPSTN/ISDNGb/IuPSservices&applicationsHLRCoreNetworkCSCFNodeBRNCUTRANIuPSMGCFMAPHSSMGWSIPH.248IPtransportPacketSwitched(PS)domainGGSN3G-SGSNGiSIPIPaccesswithmobilityservices&applicationsCircuitSwitched(CS)domain无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page63GPPRelease5–分组交换域结构（分层）LegacyPLMNSignalingNetworksUTRANIN/CAMEL,OSA/Parlay,SIPapplications3G-GGSN3G-SGSNMGCFCSCFMGWExternalIPNetworksIPMultimediaSubsystemDatabasesHSSPacketSwitchedDomainPOTS/ISDNTDMIPWeb/EmailWebserverApplicationPlatformMultimediaphoneSIPCommunication(IMS)InternetAccesswithoutIMS无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page7IP多媒体子系统（IMS）TheIPMultimediaSubsystem(IMS)providesastandardisedmultimediasolutionfor3GnetworksontopoftheIPbearerprovidedbyGPRSincludesfunctionalityforsecurity,charging,roaming,andQualityofServiceisregardedasthegenericserviceenablerforfutureIPmultimediaapplicationsin3GPPnetworks–Examples:PresenceandMessagingServiceswillbestandardisedviaIMSisbasedonIETFProtocols–SIPandSIPextensions–Diameter,COPS,…无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page8IMS:KeyPrinciplesSIPasthesingle„CallControl“ProtocolforIPMultimediaServicesUseIPv6–allIMSNetworkEntitiesincludingthemobileterminaluseIPv6HomeControl–thehomenetworkcontrolstheservicesforaroaminguserAccessIndependence–theIMSisdesignedindependentoftheunderlyingIPconnectivitynetwork–specificationsre-usedby3GPP2forCDMA2000systems–accessviaWLANwillbedefinedAllowBindingbetweenSIPDialogueandtheGPRSMediaSessionviaGointerface–inparticularforQoSandCharging无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page9IMSin3GPPRelease5–网络实体和协议CSDomain-or-PSTN-or-Legacy-or-ExternalApplicationsandServicesSCPASMultimediaIPNetworksSIPTCPUDPHTTPOthersSIPOperator1MRF-CMGCFCxScGrMmMnGcMgBGCFMiGoGmSLFMRF-PMpISCSIPDiameterH248SIPH248COPSSIPDiameterMAPSIPMj……ISUPSGWMrCSCFMwBGCFMkOperator2SIPDxSIPShMGWSGWSIPSIPCAPOSASiIM-SSFOSA-SCSDiameterCAPCSCFPDFHSSHLRPSDomainGGSNSGSNGnAlternativeAccessNetworksTCP/IP/UDP/RTP/…UEUTRANMTTEUuIuRGERAN无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page10IMS网络实体CSCF(CallSessionControlFunction)HSS(HomeSubscriberServer)PDF(PolicyDecisionFunction)SLF(SubscriptionLocatorFunction)MRF(MultimediaResourceFunction)BGCF(BreakoutGatewayControlFunction)MGCF(MediaGatewayControlFunction)MGW(MediaGateway)SGW(SignallingGateway)AS(ApplicationServer)IM-SSF(IPMultimediaServiceSwitchingFunction)OSA-SCS(ServiceCapabilityServer)Additionally:-QoSEntities-ChargingEntities-SecurityEntities-PresenceServiceEntities-LocationServiceEntities-PushServiceEntities-OAMandNMEntities-Firewalls,NAT,IPv4/v6,…-DNS,DHCP,…无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page11P-CSCF(ProxyCSCF)Firstcontactpointofanoperator‘snetwork(withinIMSCNsubsystem)ForwardingofSIPmessagesbetweenUEandCNGenerationofchargingrecordsTranslationofIDsotherthanSIPURIsintoSIPURIs(e.g.E.164numbers)AuthorisationofbearerresourcesandQoSmanagement无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page12I-CSCF(InterrogatingCSCF)Firstcontactpointofanoperator‘snetwork(forotheroperators)ForwardingofSIPmessages(proxyfunctionality)AssignmentofaS-CSCFGenerationofchargingrecordsHidingofinternalnetworkconfiguration/capacity/topology无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page13S-CSCF(ServingCSCF)PerformssessioncontrolandservicetriggeringActsasaregistrarMaybehaveasaProxyServer,i.e.itacceptsrequestsandservicesorforwardsthemon.MaybehaveasaUserAgent,i.e.itmayterminateandindependentlygenerateSIPtransactions.Interactionwithserviceplatform(s)GenerationofchargingrecordsAuthentication无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page14HSSDatabaseforsubscriberrelatedinformationUserProfileUserIdentification,Numberingandaddressinginformation(SIP,Mail,E.164,Labels,IMSI,...)UserauthenticationsupportCallcontrolsupportAccessauthenticationsupportServiceauthorizationsupportServiceprovisioningsupport无线通信技术委员会第一次全会WG2#1会议2003.8.27-29,Page15BGCF(BreakoutGatewayControlFunction)SelectsthenetworkinwhichPSTNbreakoutistooccur–ForwardsthesessiontoaMGCF(selectedbytheBGCF)inthesamenetwork–ForwardsthesessiontoanotherBGCF(orMGCF)inaforeignnetworkReceivesrequestfromS-CSCFtoselectappropriatePSTNbreakoutpointforthesessionGenerationofchargingrecords无线通信技术委员会第一