3GPP and SIP-AAA requirements3GPP CN4 WGPresented: Johanna WildMotorola GmbHmailto:Johanna.Wild@motorola.com

Overview3GPP Relationships - SIP AAA3GPP 3GPP2 Commonalities 3GPP Requirements 3GPP Approach3GPP Documentation Structure3GPP Documentation Content3GPP Goals

3GPP Relationships SIP-AAA (What do we have in 3GPP?)

SIP proxy servers (S-CSCF, I-CSCF) with requirements for authentication and authorizationA Home Subscriber Server (HSS) containing subscriber/service/security profiles relevant for SIP proxies.

Home

HSSCx interface based on DiameterSIP proxies get authorisation and authentication informationP-CSCFREGISTER/INVITEI-CSCFREGISTER/INVITES-CSCFSIP proxy serversSIP-based interfacesREGISTER/INVITE

3GPP-3GPP2 points in common (What we already have in draft-calhoun-sip-aaa-reqs)SIPClientSIP Central Point of Contact - SCPC(I-CSCF)Anchor SIPproxy(S-CSCF)AAAHLocationdatabaseHSS (3GPP)1. SIP REGISTER10. 200 OK3. AAA Req6. AAA Request5. SIP REGISTER8. 200 OK4. AAA Resp7. AAA RespCxSIP Point of Contact Visited - SPCV(P-CSCF)2. SIP REGISTER9. 200 OK

3GPP Requirements(What we have to add todraft-calhoun-sip-aaa-reqs?)

When the SCPC receives SIP REGISTER it will issue a AAA message to the Home AAA Server (AAAH). The AAA message may include information from the SIP message (e.g. From)In 3GPP the SCPC shall select an Anchor SIP proxy for the user, which will act as the client's assigned SIP server (registrar).In 3GPP the authorization period may not be controlled by the AAA server.Location query using AAA infrastructure: In 3GPP the SCPC shall send an authorization request to the AAAH, in order to determine whether the session can be established and to find the location of the Anchor SIP server and SIP Client

3GPP Requirements (What we have to add todraft-calhoun-sip-aaa-reqs?)

The AAA infrastructure MUST be able to distribute (push or pull) subscriber/service/security profiles to the relevant SIP servers based on policies.The AAAH MUST be able to update the location of the assigned SIP server for the user performing SIP registration to the location database.The AAAH MUST be able to initiate user de-registration.The AAAH MUST be able to distribute relevant information to the SCPC for the selection of the appropriate Anchor SIP proxy for the user.

3GPP Approach(How will we go for it?)AAA WG is developing Diameter applications based on requirements defined by other WGs (ROAMOPS, NASREQ). SIPPING is the right WG to develop the requirements for the connection of SIP nodes to AAA infrastructure.We will bring the new requirements to extend draft-calhoun-sip-aaa-reqs to the SIPPING email list.We will use the requirements to develop a new Diameter application in the AAA WG.The new Diameter application would be referenced from 3GPP technical specifications following the structure shown in the following slides

3GPP Documentation Structure (A picture)

TS 23.228(SA2)TS 24.228(CN1)TS 29.228(CN4)TS 29.229(CN4)3GPPIETFDRAFT3G-SIP-AAA(SIPPING)DRAFT3GPP-DMA(AAA)

3GPP Documentation Content (A list of content lists)

3G TS 23.228 IP Multimedia Subsystem Stage 2 High level concepts and requirementsArchitectural frameworkHigh level end-to-end information flow samples3G TS 24.228 - Signaling flows for the IP Multimedia call control based on SIP and SDP Stage 2/3End-to-end signaling flows for IP Multimedia Call ControlInteractions with flows over the interface to the Application ServersInteractions with flows over the Cx interface

3GPP Documentation Content (Another list of content lists)

3G TS 29.228Use cases for the Cx interfaceOperations over the Cx interfaceMapping of Cx operations and related parameters to Diameter Commands and AVPsMapping 3GPP node names to IETF namesPointers to protocol details specifications3G TS 29.229Description of Diameter Base Protocol Usage Definition of Diameter Multimedia Application Commands and Result Code AVPsDefinition of Diameter Multimedia Application AVPsOverlap with planned draft-czoma-diameter-multimedia-application-00.txt

3GPP Documentation Content (The last list of content lists)

draft-calhoun-sip-aaa-reqs-02.txtCommon 3GPP and 3GPP2 AAA requirements for IP Multimedia applications based on SIP and SDPSpecific 3GPP2 AAA requirements for IP Multimedia applications based on SIP and SDPSpecific 3GPP AAA requirements for IP Multimedia applications based on SIP and SDPplanned draft-czoma-diameter-multimedia-application-00.txtDefinition of Diameter Multimedia Application Commands and Result Code AVPsDefinition of Diameter Multimedia Application AVPsOverlap with 3G TS 29.229

3GPP Goals(What else do we need?)To re-introduce the AAA requirements including 3GPP in a SIP environment to the charter of SIPPING WG.To include the AAA requirements including 3GPP in a SIP environment to the list of deliverables of SIPPING WG. The draft-calhoun-sip-aaa-reqs should be stable by November 2001 in order to serve as a basis of the work in AAA WG in time.The draft-czoma-diameter-multimedia-application based on these requirements, planned for September 2001 submission to the AAA WG, needs to go to proposed standards status within a timescale which will allow for it, to be referenced by 3GPP.