The 3GPP2 ArchitectureContentsIntroductionSlide 4Basic Design Philosophy of 3GPP2The Official Reference Model!A Simpler Version!PowerPoint PresentationSlide 9A Mobility PerspectiveSlide 11Slide 12Security and Mobility ManagementServices etc.Note that,Slide 163GPP All-IP Network Architecture Model3GPP NAM - Discussion3GPP2 All-IP Network Architecture Model3GPP2 NAM - DiscussionSlide 21The Mobile Wireless Internet Forum (MWIF)MWIF All-IP Network Architecture ModelSummaryThe 3GPP2 ArchitectureSridhar MachirajuCS294-3, Spring 2002,University of California at BerkeleyContents•Introduction•The 3GPP2 Architecture•Mobility Management in 3GPP2•Functional comparison of 3GPP and 3GPP2.•Architectural comparison of 3GPP and 3GPP2•The MWIF Architecture.We saw that the 3GPP architecture evolved from the already-existing GPRS network. It can be viewed as IP-based multimedia enhancements to 2G networks.However, 3GPP2 has created a new architecture (there was no existing packet packet data service) for the 2G and 3G CDMA air interfaces.IntroductionContents•Introduction•The 3GPP2 Architecture•Mobility Management in 3GPP2•Functional comparison of 3GPP and 3GPP2.•Architectural comparison of 3GPP and 3GPP2•The MWIF Architecture.Basic Design Philosophy of 3GPP2•Leverage existing globally-accepted IETF protocols whenever possible e.g., mobile IP (for mobility), IPSec (for e2e security), AAA (authentication, authorization and accounting for network access).•Some advantages are – –Interoperability/roaming with existing IP networks.–Easy deployment of new services.–Well understood standards.The Official Reference Model!A Simpler Version! BTS BSC MSCHLR VLROTAFPDSN AAASMSIP SCP SNPDNPSTNControl of ServicesInternetBase StationPacket data functionsTraditional “Switching Point”Much More Simpler!•BTS – Base Transceiver Station•BSC – Base Station Controller•MSC – Mobile Switching Center•PDSN - Packet Data Serving Node•HA – Home Agent•IWF – Inter-Working FunctionContents•Introduction•The 3GPP2 Architecture•Mobility Management in 3GPP2•Functional comparison of 3GPP and 3GPP2.•Architectural comparison of 3GPP and 3GPP2•The MWIF Architecture.A Mobility Perspective•Note that, for simple IP, the HA is not used.•AAA is used for data service authentication.•The PPP tunnel from the MS terminates at the PSDN which acts as the Foreign Agent (FA).•The PSDN is the first hop IP router and performs Diffserv shaping, ingress filtering, handoff between PCFs.•The PDSN is also responsible for forwarding accounting information to the appropriate AAA entity.•The PCF maintains a layer 2 connection with the PSDN for sending/receiving packets for MSs under its control.The Ultimate Goal – An All-IP NetworkContents•Introduction•The 3GPP2 Architecture•Mobility Management in 3GPP2•Functional comparison of 3GPP and 3GPP2.•Architectural comparison of 3GPP and 3GPP2•The MWIF Architecture.Security and Mobility Management•3GPP uses GGSN, SGSN nodes.•3GPP does not allow heterogeneous access.•The HLR is likely to be used by the SGSN for authenticating data users. Thus, access and data network authentication are integrated.•3GPP2 uses mobile IP and PSDN as FA/HA .•It allows heterogeneous access.•The PDSN uses an AAA infrastructure to authenticate data users. Access and data network authentication are separate.Services etc.•The 3GPP model has a SIP-like functionality in the 3 types of Call State Control Functions (CSCF).•Location service in the 3GPP model is tied closely to the access.•GTP is used to provide link-layer mobility.•Though the specification is yet to be published, 3GPP2 has decided to use SIP.•In the 3GPP2 model, location service is more of a database i.e., access-independent.•Link layer mobility in the 3GPP2 world is viewed as a direct extension of mobile IP.Note that,•Due to the lack of standards for SIP with all potential applications like VoIP, there is a danger of 3GPP and 3GPP2 coming up with incompatible extensions to SIP which would have to be harmonized sometime later.•The 3GPP2 specification is not as complete as the 3GPP specification. •In the 3GPP specification, there is an option to place a mobile IP-based Foreign Agent in the GGSN. Still, this would introduce a lot of tunneling overhead in the GGSN-SGSN path (Mobile IP over GTP over IP).Contents•Introduction•The 3GPP2 Architecture•Mobility Management in 3GPP2•Functional comparison of 3GPP and 3GPP2.•Architectural comparison of 3GPP and 3GPP2•The MWIF Architecture.Emergency ServicesNetwork3G-HLRUTRANBSS/GERAN3G-HLRG-MSC ServerIP Multimedia SubsystemPS Domain3G-SGSN3G-GGSNR-SGWMGCFMGWPSTN/Legacy/ExternalT-SGWLegacy mobilesignallingNetworkMultimediaIP NetworksMultimediaIP NetworksMSC ServerSignaling only User Data and SignalingBGCFApplications &ServicesSCPCSCFCSCFApplicationServiceControlTransportCS DomainRAN3G-HLRUMSHSSMRFGMLCMT TE3GPP All-IP Network Architecture Model3GPP NAM - Discussion•3GPP is divided into 4 planes – IP Multimedia, Packet-Switched, Data-Switched and Radio Access.•At each plane, there exist data and control functions.•The picture is very disorganized especially from traditional networking perspective. –Legacy transport gateways are on the same plane as applications.–HLR and Unified Messaging Service are in limbo.–As mentioned earlier, the location service is access dependent because of its presence in the lowest layer.–The CSCF has all the functionality; there is not much modularity.•Transport and Control reside in the same functional node often.•Applications have to talk to either of CSCF, HSS, SGSN.•QoS is implemented in CSCF and GGSN.ApplicationServiceControlTransportMedia Gateway ControlRoaming Signaling GatewayService ApplicationNetwork Capability GatewaySubscription QoS ManagerDatabasesEIR DSI Sub PoliTrunk Signaling GatewayMAP41 & GSMPSTNIPNetworkSession Control ManagerCore QoS ManagerMedia GatewayBorder RouterPosition ServerPosition Determining EntityAAALegacy MS Domain Support Media Resource FunctionMobile IP Home AgentAccess Net.AccessGatewayFA/AttendantBSC+ PCFBTSMMOtherAccess NetworksMSSignaling-ControlBearerRadio3GPP2 All-IP Network Architecture Model3GPP2 NAM - Discussion•3GPP2 fits into the Transport, Control, Service, Application Plane model much better.•The PSDN will have only the HA/FA functionality unlike the GSN nodes.•Applications talk to only the NCG.•The
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