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MMD Evolution. June 28, 2005. Outline. MMD Basics End-to-End Example Packet Switched Video Telephony Legacy MS Domain Evolution Transition to MMD MMD Evolution 3GPP2 Project Roadmap. Introduction. 3GPP2 defines core standards for VoIP and multi-media services - PowerPoint PPT Presentation

Text of MMD Evolution

  • MMD EvolutionJune 28, 2005

  • OutlineMMD BasicsEnd-to-End ExamplePacket Switched Video TelephonyLegacy MS Domain EvolutionTransition to MMD MMD Evolution3GPP2 Project Roadmap

  • Introduction3GPP2 defines core standards for VoIP and multi-media servicesNot just a replacement for circuit-switched voiceOther example services: voice/video conferencing, PTT, Presence and Instant Messaging.CDMA2000 packet network standards build on results from the IETF and IMS-related standards from 3GPP3GPP2 All-IP network is comprised of two domains:Legacy MS Domain (LMSD)Multimedia Domain (MMD.)

  • LMSDThe Legacy MS Domain provides support for existing mobiles (e.g., analog, IS-95-A, IS-95-B, IS-2000) with an IP core network.The Legacy MS Domain supports the features and capabilities provided in a legacy network in a manner transparent to the user.LMSD supports Transcoder Free Operation (TrFO) and Remote Transcoder Operation (RTO) operations.

  • Multi-Media DomainMulti-Media Domain (MMD) provides support for SIP capable mobile stations in an IP core network environment.MMD supports multimedia sessions to and from SIP-capable mobileAlso defines interworking with circuit switched networks via Media Gateways.

  • IP Multimedia in 3GPP/3GPP23GPP/3GPP2 standards for IP Multimedia servicesIP Multimedia Subsystem (IMS) in 3GPPMultimedia Domain (MMD) in 3GPP2 (IMS plus CDMA packet data transport and enhancements for CDMA operation.)3GPPs decided to harmonize IMS. Now nearly identical at IMS level.

    Regulatory issues must be addressed (VoIP surveillance, tax structure for internet services, E911 and position location, etc.)

  • Basic call flow

  • Packet Switched Video Telephony (PSVT)An example service for the MMDIncludes air interface, RAN, core network aspects, and terminal procedures Most procedures exist in current standards, e.g.X.S0011 Wireless IP Rev DX.S0013 MMD Rev 0A.S00xxxxxxxxxxxx IOSC.S0024 HRPD Rev AC.S0001 - C.S0006

  • PSVT ComponentsAir InterfaceService Options to be used for transporting SIP, Audio, Video, and RTCP trafficProcedures for requesting appropriate air link QoS for these different traffic typesIOS (A-interface)Specifications for handoffs and cross paging of HRPD-1x hybrid terminalsPacket Data NetworkIdentifies procedures for QoS establishment and flow treatmentRecommends header compression optionsProcedures for packet data accountingMMDProcedures for session setup using SIPSIP compression and security proceduresProcedures for MMD accounting

    Following slides provide architecture and call flows.

  • PSVT Reference Model

    Cloud

    text

    HSS

    IPNetworks

    P-CSCF

    PDSN

    RAN

    MS

    P-CSCF

    PDSN

    RAN

    AAA

    HSS

    Network B

    MS

    SIP SignalingOTA/IOS SignalingMedia Control for Audio/VideoAudio Bearer PathVideo Bearer PathAAA/HSS InterfacesMP Interfaces

    Network A

    I/S-CSCF

    I/S-CSCF

    MRFP(optional)

    MRFC(optional)

    AAA

  • PSVT Call Flow (tbd)

    S-CSCF

    P-CSCF

    PDSN

    RAN

    MS-1

    8. Media Flow

    1. SIP Capability Exchange (INVITE/183)

    2. Bearer Resource Establishment

    3. Indicate Bearer setup complete (UPDATE/200 OK)

    5. Indicate MS-2 alerted (180 Ringing)

    4. Called MS alerted

    6. Called MS answers

    7. Complete SIP session setup (200 OK/ACK)

    MS-2 HN

    MS-2

    Bearer Resource Establishment

  • PSVT QoS-1Access networks enforce agreed QoS for different IP flows

    Cloud

    SIP Servers

    Terminal

    BSC/AN

    PDSN

    PDSN

    BSC/AN

    Terminal

    RLP Links

    GRE Tunnel

    GRE Tunnel

    RLP Links

    Audio RTP

    Video RTP

    Audio RTCP

    Video RTCP

    Audio RTP

    SIP

    Video RTP

    Audio RTCP

    Video RTCP

    SIP

    IP Network

  • PSVT QoS-2PDSN enforces DiffServ code pointsEnd-to-End QoS possible within managed network(REDRAW figure)

    Drag the side handles to change the width of the text block.

    Cloud

    DiffServNetwork

    PDSN polices/remarks DSCP then forwards IP packet

    BSC/AN tunnels data over A10 connection

    DSCP

    Application QoS Negotiation (SIP/SDP)

    Air link (RLP)

    A10 connection

    SendingTerminal

    PDSN uses TFT filter to map packet to A10

    BSC/AN maps A10 to RLP link

    Air link (RLP)

    A10 connection

    ReceivingTerminal

    DSCP

  • PSVT ChallengesLow-interruption handoffsRequires low latency inter-PDSN handoffs HRPD does not YET support active handoffsHand-down and hand-upVariations in QoS resources or bearer support due to sector loading or inter-technology handoffsHow to modify media streams (e.g., add/remove video) with minimal interruption?Updating QoS resources for MS.

  • LMSD EvolutionLegacy Mobile Station Domain (LMSD)IS-2000 RAN, with IP-based Ainterface , VoIP transport between MSC soft-switches Step 1, call deliveryStep 2, handoffs and better feature support.Ability to interwork with other network types:MMD/IMSPacket CableDSLEnhancementsFaster call setup Security for bearer.

  • Transition ArchitectureEvolution to MMD will occur in stepsTransition architecture will supportInterworking with legacy circuit switched networksHandoffs from MMD services to legacy services where possible.

  • Placeholder for HRPD/1x interworking figure

  • MMD EvolutionDefine the path from circuit switched voice networks to LMSD and MMDTransition ArchitectureCall deliveryHandoffWLAN..ServicesConferencingMessaging and PresenceEmergency servicesLocal services.EnhancementsFaster session setupSecurity.

  • Future DevelopmentTrue End-to-End QoS

    Full interworking with other networks, including UMTS, public internet, Next Generation Network

  • 3GPP2 MMD Roadmap

    Architecture, Security, LMSDStage 2Stage 3Access network specifications.

    (note published documents available at www.3gpp2.org)

  • Architecture, Security, LMSD

    Stage 1 and Overview DocumentsS.R0037-A, IP Network Architecture Model for cdma2000 Spread Spectrum SystemsS.R0062, Presence Stage 1X.S0027-000, Presence Overview X.S0013-000, MMD Overview document Security DocumentsS.R0086-A, MMD Security FrameworkLegacy Mobile Station Domain (LMSD) Documents(IS-95/2000 circuit mode MS+RAN with VoIP core network)S.R0092, System requirementsS.R0096 Transcoder Free Operation, Stage 1 requirementsP.S0002, LMSD - Step 1, incoming PSTN call deliveryX.S0012, MSCe-MSCe Signaling ControlX.S0018, G.711 PCM voice between MGWs.

  • Stage 2X.S0013-002 IP Multimedia Subsystem (IMS) (based on 3GPP TS 23.228)X.S0013-003 IP Multimedia (IM) session handling; IM call model (based on 3GPP TS 23.218)X.S0013-007 Accounting Architecture (based on TS 32.200)X.S0013-005 IP Multimedia (IM) Subsystem Cx Interface; Signaling flows and message contents (based on TS 29.228)X.S0013-010 IP Multimedia Subsystem (IMS) Sh Interface signaling flows and message contents (based on TS 29.328)X.S0027-001, Presence Architecture

  • Stage 3Protocol & ProceduresX.S0013-004, IP Multimedia Call Control Protocol based on SIP and SDP; (based on TS 24.229)X.S0013-006, Cx Interface (HSS-CSCF) based on the Diameter protocol; Protocol details (based on TS 29.229)X.S0013-008, Accounting data description (based on TS 32.225)X.S0013-011, Sh interface (HSS-AS) based on the Diameter protocol (based on TS 29.329.)X.S0017 Open Service Access (OSA); Application Programming Interface (based on TS 29.198 series)

  • CDMA Access Network DocumentsPacket Data Serving Node (PDSN)X.S0011-C, Wireless IP Network Standard (IS-835)CDMA2000 1x air interfaceC.S0001 to C.S0006, cdma2000 Family of Standards for Spread Spectrum SystemsC.S0047, Header compression/removal service options, allows VoIP to be sent efficiently over the air CDMA2000 DO air interfaceC.S0024-A (IS-856-A), Significant upgrades for supporting QoS sensitive servicesC.S0063 (TIA-1054), Enhanced Multi-flow Packet Application, eliminates overhead from PPP and octet-based HDLC-like framing. Two-route RLP facilitates seamless BSC-BSC Connected State handoff to eliminate interruption during the VoIP call.

  • Current ProjectsX.P0011-D, includes MIP6 and QoS supportX.P00xx, End-to-end QoS X.S0013 revisionIncludes new part for Service Based Bearer Control, X.P0013-012, enables mapping/control of SDP-negotiated QoS to air interface QoS.X.P0027, New parts for presence security, protocol, network presence.X.P0028, CDMA/WLAN interworkingScenarios 1,2Scenarios 3,4X.P0029, ConferencingTSB-58-G, to define QoS Profiles A-interfaceIS-878-A/IS-1878-A, QoS support on the A-interfaceIS-878-B / IS-1878-B, Connected State seamless inter-BSC soft handoff and session transferC.P0023-C, R-UIM cards support for MMD data.PN-0196, Lawfully Authorized Electronic Surveillance for cdma2000 VoIP.HRPD/1x interworkingPacket Switched Video Telephony.