Support of Multiple Access Technologies in 3GPP

Transcription

1 Support of Multiple Access Technologies in 3GPP Farooq Bari UBC Workshop March 9, 2007

2 Release 6 I-WLAN Intranet / Internet 3GPP Network WLAN UE WLAN Access Network (with or without an intermediate network) Server Packet Data GW WLAN 3GPP IP Access 3GPP PS services (including access to internet)

3 Non-Roaming IWLAN Architecture 3GPP Home Network Intranet / Internet SLF HSS HLR Dw Wx D' / Gr' Wf Offline Charging System WLAN Access Network Wa Server Wo OCS Wz WLAN UE Ww Wn Wg Wm Wy WAG Wp PDG Wi Wu WLAN 3GPP IP Access

4 Roaming IWLAN Architecture 3G PP Visited Netw ork WLAN Access Network W a W g W m W f Proxy WLAN UE Ww Wu Wn WAG Wp W LAN 3GPP IP Access Packet Data Gateway Wi Wz O ffline Charging System Wd Intranet / Internet SLF HSS HLR O ffline Charging System D w Wx D ' / G r' W f 3GPP Home Network Server Wo OCS

5 Roaming IWLAN Architecture Intranet / Internet 3G P P V isited N etw ork WLAN UE Ww W LAN Access Network Wn WAG W a W g Proxy Wf O ffline Charging System Wd Wu WLAN 3GPP IP Access Wp P acket D ata Gateway Wi W m W y Server W z Wo OCS 3GPP Home Network D' / Gr' W f D w Wx SLF HSS HLR O fflin e Charging System

6 Protocol stack between the WLAN UE and the Packet Data Gateway

7 I-WLAN and VPLMN selection procedure

8 WLAN Access Authentication and Authorisation WLAN UE W LAN AN Server HSS/HLR WAG 1. W LAN C onnectionsetup 2. N e c e s s a r yam ountof EAP R equest & EAP Response m essageexchangesbetw een UE a n d 3 G P P A A A S e r v e r as s p e c if ie din th e u tilis e d E A P type 3. Authentic ationinfo r e tr ie v a lfrom H S S if info not yet available in 3 G P P A A A s e r v e r 4. Subscriberprofile r e trie va l fro m H S S if info no t ye t a va ila b le in this 3G P P A A A s er ver 5. Policy enforcem entinfo delivery 7. EAP/Success 6. Access Accept [keying material and a utho risatio n in f o r m a tio n within message] 8. Accounting Start 9. V a lid a te th e n e w s e s s io n 10. W LAN Registrationto H S S if W L A N u s e r not y e t r e g is te r e dto this 3 G P P A A A S e r v e r

9 W-APN resolution and Tunnel establishment WLAN UE WLAN AN WAG Server/Proxy Visited PDG Server Home PDG 1. WLAN UE local IP address allocation and optionally WLAN Access Authentication and Authorization 2. W-APN resolution and tunnel establishment to PDG in Visited PLMN 2.1 DNS query: 2.2 End-to-end tunnel establishment 2.4 Tunnel packet flow filter exchange 2.3 Retrieving Authentication and Authorization data 3. W-APN resolution and tunnel establishment to PDG in Home PLMN 3.1 DNS query: 3.2 End-to-end tunnel establishment 3.4 Tunnel packet flow filter exchange 3.3 Retrieving Authentication and Authorization data

10 Release 6 Support for non-3gpp Access Technologies Scenario 2 i.e. common authentication, and billing supported Scenario 3 partially supported with No QoS, partial IMS support (for example no emergency call support), no IMS support Scenario 4 and above with Mobility, seamless service continuity, support for CS type services not supported.

11 Release 7 additions Support for Diffserv type QoS model for I- WLAN The text in specification made generic so that any access technology that can support the identified interfaces in the specifications will be included. Addition of Support for non-3gpp Access Types in Policy Control and Charging Architecture Still no support for Mobility or Session Continuity

12 Support for Multiple Access Technologies in System Architecture Evolution (SAE)

13 HSS Wx* 2G/3G SGSN S4 S6a PCRF S3 S7 Rx+ S1-MME EUTRAN MME S10 S1-U S11 Serving SAE Gateway S5 PDN SAE Gateway SGi Operator s IP Services (e.g. IMS, PSS etc.) S6c S2b Wm* S2c S2a epdg Server HPLMN Wn* Non-3GPP Networks Trusted/Untrusted* Non-3GPP IP Access or 3GPP Access Trusted Non-3GPP IP Access Untrusted Non-3GPP IP Access Wa* UE Ta* * Untrusted non-3gpp access requires epdg in the data path

14 HSS Wx* S6a S7 hpcrf Rx+ PDN SAE Gateway SGi Operator s IP Services (e.g. IMS, PSS etc.) HPLMN S8b S9 S6c Server 2G/3G SGSN S4 S3 S1-MME LTE RAN MME S10 S1-U S2c S11 Serving SAE Gateway S2b S7 S2b epdg vpcrf S6d Wm* Wd* Proxy VPLMN S2a S2a Wn* Non-3GPP Networks Trusted/Untrusted* Non-3GPP IP Access or 3GPP Access S2c Trusted Non-3GPP IP Access Untrusted Non-3GPP IP Access Wa* UE Ta* * Untrusted non-3gpp access requires epdg in the data path

15 Topics under discussion Mobility and Service/Session Continuity Policy Control, QoS and Charging Network Discovery and Selection SAE Identities Authentication and Authorization

16 Initial Attach using Network based MM over S2b for non-roaming

17 Initial Attach using Host based MM over S2b for non-roaming

18 Support for IMS across Access Technologies IMS is considered a service enabler and separate from underlying transport access types It was made largely access agnostic in Release 5. Harmonization of IMS across different access types already underway Cablelabs, TISPAN and other forums already contributing to this effort New Concepts: Core IMS and Common IMS

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20 Reference 3GPP Documents TS TR TS TS