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3GPP System Architecture Evolution ATIS LTE Conference January 26, 2009

3GPP System Architecture Evolution ATIS LTE Conference January 26, 2009. 3GPP TSG SA Chairman Stephen Hayes. 3GPP Directions. FASTER. Faster Data rates Decreased Latency High Cell Edge Throughput Spectrum Flexibility. Access independence for services Standardized multimedia services

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3GPP System Architecture Evolution ATIS LTE Conference January 26, 2009

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  1. 3GPP System Architecture EvolutionATIS LTE ConferenceJanuary 26, 2009 • 3GPP TSG SA Chairman • Stephen Hayes

  2. 3GPP Directions FASTER • Faster Data rates • Decreased Latency • High Cell Edge Throughput • Spectrum Flexibility • Access independence for services • Standardized multimedia services • Mobility and IP interworking for all accesses Wider Scope Radio Network Core Network

  3. From GSM to multi-access Continuous improvement of access technologies Provision of services over any access network Common Core network Packet Cable GSM 1900 WiMAX? 3G HSPA GSM 1800 Fixed GSM 900 E-UTRAN GPRS EDGE WLAN ? Rel-5/6 GSM ph.1 Rel-6/7 Rel-8 and onwards R97 R98 R99

  4. Broadband Accesses They come in many flavors Fixed access Fixed/nomadicwireless Mobile access Fixed Wireless HSPA/LTE GSM/EDGE xDSL Fiber (PON & P2P) Fiber/VDSL2 WCDMA/HSPA Satellite/Terrestrial LTE Unlicensed (WiFi, etc) Cable (DOCSIS2 3) CDMA2000 EVDO Others Mobile WiMax Others The borderline between fixed and mobile is getting less clear

  5. Standard Services & IMS Fixed Core Network Mobile Core Network Wireless access Core Functions: Wireless access Core Functions: • IP session ctrl • Mobility support • Deep Packet Inspection • Security • Charging • Policy and Resource control • IP session ctrl • Deep Packet Inspection • Security • Charging • Policy and Resource control Mobility Wireline access RGW Transport Standard Services & IMS EPC Core Functions: Wireless access Accessinter-workingfunctions • IP session ctrl • Mobility support • Deep Packet Inspection • Security • Charging • Policy and Resource control Mobility Wireline access RGW Transport 3GPP Approaches to Multi-Access Service Convergence using Common IMS Session Convergence Using Evolved Packet Core (EPC)

  6. Standard Services & IMS Fixed Core Network Mobile Core Network Wireless access Core Functions: Wireless access Core Functions: • IP session ctrl • Mobility support • Deep Packet Inspection • Security • Charging • Policy and Resource control • IP session ctrl • Deep Packet Inspection • Security • Charging • Policy and Resource control Mobility Wireline access RGW Transport ServiceConvergence Service Convergence using IMS/Common IMS

  7. IMS/Common IMS • IMS developed as part of 3GPP Rel 5 as an application development environment • Encourage new applications to use environment • Greater operator policing than native SIP/SDP • Home control allowing customization • IMS retargeted in Rel 7 for telephony replacement • Standardized multimedia suite developed • Optimizations to improve performance • Access independence • Common IMS specified in Rel 8 • Integration of IMS variants and requirements from 3GPP2, TISPAN, and Cablelabs IMS MMTel Common IMS 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 UMTS (3G) HSPA DL HSPA UL LTE

  8. IP Multimedia Core IP Multimedia Subsystem (IMS) • PS domain IP Multimedia service platform • Based on open IETF standards • End to end IP (SIP) • Multi access • GPRS, I-WLAN, fixed xDSL, Packet Cable defined • More access technologies to follow... Internet Find & route to destination Circuit-switched network (2G or 3G) PSTN IP connectivity (GPRS, 3G,...) User data Any IP connectivity (3G, WLAN,...) End-to-End IP services

  9. Common IMS • 3GPP members, 3GPP2, WiMAX forum, ETSI TISPAN and CableLabs contribute to 3GPP common IMS specifications • Different requirements are supported in common implementation • All IMS specifications are harmonized to 3GPP specifications • Common parts are defined in 3GPP specifications only • Core IMS entities (CSCFs, AS, UE IMS client,...) + agreed common functions • Other organisations either reference or re-use 3GPP specification as it stands • Any changes or additions in the Common IMS area are made in 3GPP • All 3GPP members can contribute on their favourite work items • Ongoing work initiated by 3GPP members, CableLabs, 3GPP2 and ETSI TISPAN • The scope and coverage of Common IMS have been agreed by the SDOs • Common version of IMS specifications in Rel-8 • Business or architecture specific additions to 3GPP Common IMS are possible outside the agreed Common IMS area

  10. Multimedia Telephony Service • Multiple Simultaneous Media Streams • Voice • Text • Video • File Transfer • Video/Photo/Audio Sharing • Multimedia analogs of traditional PSTN supplementary services • Originating Identification Presentation (OIP) • Originating Identification Restriction (OIR) • Terminating Identification Presentation (TIP) • Terminating Identification Restriction (TIR) • Malicious Communication IDentification (MCID) • Anonymous Communication Rejection (ACR) • Communication Diversion (CDIV) • Communication Waiting (CW) • Communication Hold (HOLD) • Communication Barring (CB) • Completion of Communications to Busy Subscriber (CCBS) • Message Waiting Indication (MWI) • Conference (CONF) • Advice Of Charge (AOC) • Explicit Communication Transfer (ECT) • Reverse charging • Closed User Group (CUG) • Three-Party (3PTY)

  11. But what if you need? • Session Continuity • Mobility for non IMS applications • Common IP level services • Filtering • Deep Packet Inspection • Firewall • Common Management

  12. Standard Services & IMS EPC Core Functions: Wireless access Accessinter-workingfunctions • IP session ctrl • Mobility support • Deep Packet Inspection • Security • Charging • Policy and Resource control Mobility Wireline access RGW Transport Session Convergence Session Convergence Using Evolved Packet Core (EPC)

  13. Examples of non-IMS apps • Multimedia Broadcast Messaging Service (MBMS) • High Quality Audio • Packet Streaming

  14. System Architecture Evolution (SAE) • LTE = E-UTRAN = evolved radio network • Megabit class data rates • Short delays • Short transition from idle to active • SAE = System Architecture evolution • SAE is the project name, the evolved network is called EPC • Evolved IP oriented multi access architecture • E-UTRAN integrates only to SAE, A/Gb or Iu not possible • Strongly IP based PS only network • EPC covers both 3GPP and non-3GPP access technologies • Seamless roaming between E-UTRAN, 2G and 3G (tight interworking) • Loose interworking with non-3GPP accesses • GTP solution for intra-3GPP mobility and IETF based solution for non-3GPP mobility • The main Architecture specifications 23.401 and 23.402 frozen in June 2008 • Protocol work is ongoing and frozen with exceptions in December 2008

  15. Convergence Using EPC • Mobility and ubiquity adds value to all services • Individualizing all services • Consistent experience across accesses and devices • Bundling different fixed, fixed wireless and mobile subscriptions • Access and device awareness Roaming partner Wireless Access Evolved Packet Core Operator Services (e.g. IPTV,VoIP, ....) QoS and Bandwidth mgmt IP level service control Charging Content/Service filtering Internet Wireline Access Firewall/Security services individualized default (per bundle) Partner services Uniform service/QoS treatment Across accesses and devices Friends house

  16. SAE architecture (23.401) NAS signaling+sign. security Mobility between 3GPP ANs Idle mode UE reachability P-GW and S-GW selection SGSN selection at HO Authentication Bearer establishment UE IP address allocation Packet screening & filtering Policy enforcement Charging support Legal interception Signaling security (UMTS AKA) Mobility anchor Packet routing Idle mode packet buffering & DL initiation Legal interception User plane security (UMTS AKA)

  17. HSS Wx* S6a S4 2G/3G SGSN PCRF S3 Rx+ Rx+ S7 MME S11 SGi Operator’s IP Services (e.g. IMS, PSS etc.) S1-MME Serving Gateway PDN Gateway S10 EUTRAN S5 S6c S1-U S2b Wm* ePDG 3GPP AAA Server S2c S2a Wn* HPLMN Non-3GPP Networks Trusted Non-3GPP IP Access Wu* Trusrted* Non-3GPP IP Access or 3GPP Access Untrusted Non-3GPP IP Access Wa* Ta* UE UE * Untrusted non-3GPP access requires ePDG in the data path SAE non-3GPP access (23.402) S2 for connectivity via non-3GPP acces Untrusted IP access via ePDG Trusted IP access directly to P-GW

  18. SAE/LTE Deployment • Deployments are expected to start with overlapping cellular coverage • E-UTRAN overlapping with legacy 3GPP GERAN / UTRAN coverage • E-UTRAN overlapping with legacy 3GPP2 coverage • Multi-mode networks and terminals • E-UTRAN is a packet-only radio with no CS capacity • Initially E-UTRAN is foreseen as “islands” in the sea of legacy cellular access • Mobility between E-UTRAN and legacy access is required • Mobility between PS and CS domains is required • Multi-mode terminals expect to use PS coverage where available • Desire to keep the connectivity and services

  19. Other Improvements • Continuously Improving Security • EPC requires USIM (or non-3GPP equivalent) • Multi-mode terminals and networks • Service continuity • Multiple registration • Voice Call Continuity • CS Fallback • Network selection • Rel 9 will focus on • Regulatory enhancements to LTE/EPC • Home(e) NodeB enhancements to EPC

  20. Summary – The 3GPP Access Onion Integration of different accesses at different levels Common IMS Evolved Packet Core (EPC) CDMA 2000 Access Cable Access GPRS Access GPRS Packet Core LTE Access NGN (TISPAN) Access WiFi Access WiMax Access HSPA Access xDSL Access Fiber Access

  21. Summary • LTE is only part of what 3GPP works on • EPC (SAE) is the core network for LTE …but • IMS and EPC (SAE) can be used to provide service and session convergence across a variety of accesses For further information: www.3gpp.org

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