3GPP System Architecture Evolution. ATIS LTE Conference January 26, GPP TSG SA Chairman Stephen Hayes

Transcription

1 3GPP System Architecture Evolution ATIS LTE Conference January 26, GPP TSG SA Chairman Stephen Hayes 1

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

3 From GSM to multi- Continuous improvement of technologies Provision of services over any network Common Core network GERAN UTRAN Evolved RAN S1 Gb Iu Visited Network GPRS Core SGSN S4 S3 MME UP E S5a Visited EPC 3GPP Anchor vpcrf S7 S6 S8 S2 Home Network S9 hpcrf HSS S7 S6 Home Inter AS Anchor Home EPC SGi Rx+ Op. IP Serv (IMS, PSS, etc.) S2 non 3GPP WLAN * Color coding: red indicates new functional element / interface GSM 1800 GSM G HSPA Packet Cable WiMAX? GSM 900 GPRS EDGE WLAN Fixed E-UTRAN? GSM ph.1 R97 R98 R99 Rel-5/6 Rel-6/7 Rel-8 and onwards 3

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

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

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

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 independence Common IMS specified in Rel 8 Integration of IMS variants and requirements from 3GPP2, TISPAN, and Cablelabs IMS MMTel Common IMS UMTS (3G) HSPA DL HSPA UL LTE 7

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

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 9

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) 10

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

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

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

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 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 technologies Seamless roaming between E-UTRAN, 2G and 3G (tight interworking) Loose interworking with non-3gpp es GTP solution for intra-3gpp mobility and IETF based solution for non-3gpp mobility The main Architecture specifications and frozen in June 2008 Protocol work is ongoing and frozen with exceptions in December

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

16 SAE architecture (23.401) NAS signaling+sign. security HSS PCRF HPLMN Mobility between 3GPP ANs Idle mode UE reachability P-GW and S-GW selection SGSN selection at HO Authentication Bearer establishment S6a S 7 PDN Gatew ay SGi Rx + Operator s IP Services (e.g. IMS, PSS etc.) VPLMN UTRAN GERAN SGSN S1-MME S3 MME S4 S12 S8a UE IP address allocation Packet screening & filtering Policy enforcement Charging support Legal interception Signaling security (UMTS AKA) UE LTE - Uu E-UTRAN User plane security (UMTS AKA) S10 S1-U S11 Serving Gatew ay Mobility anchor Packet routing Idle mode packet buffering & DL initiation Legal interception 16

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

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 Mobility between E-UTRAN and legacy 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 18

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 19

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

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 es For further information: 21