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Diameter General Purpose Session draft-liebsch-dime-diameter-gps-01.txt

Diameter General Purpose Session draft-liebsch-dime-diameter-gps-01.txt. M. Liebsch, G. Punz IETF80, Prague Diameter Maintenance and Extensions (DIME) WG 01 st April 2011. History. Initial version presented at IETF78 in Maastricht Updated version presented at IETF79 in Beijing

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Diameter General Purpose Session draft-liebsch-dime-diameter-gps-01.txt

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  1. Diameter General Purpose Sessiondraft-liebsch-dime-diameter-gps-01.txt M. Liebsch, G. Punz IETF80, PragueDiameter Maintenance and Extensions (DIME) WG 01st April 2011

  2. History • Initial version presented at IETF78 in Maastricht • Updated version presented at IETF79 in Beijing • First revision addresses comments and adds more details as well as clarifications • GP Session concept • Context Grouping • Analysis • Approaches

  3. Idea behind the GP Session (2/2) AVPs apply to single user Single-user context(RFC3588) Diameter Hdr Session-ID AVPs Maintain standard format,but adopt new interpretation AVPs apply to group of users Multi-user context/ Bulk signaling Diameter Hdr GP Session-ID Users AVPs - Group-ID - List of individual Session-IDs - Grouped AVP

  4. Coding options for bulk signaling(in the order of efficiency) • Group-ID identifies multiple users, list of attributes/values applies to all users of the group • List of Session-IDs identifies a group of users, list of attributes/values applies to all users of the group • List of Session-IDs identifies multiple users, each Session-ID has an individual list of AVPs associated Diameter Hdr GP Session-ID AVP 1 AVP 2 AVP N Group-ID Diameter Hdr GP Session-ID AVP 1 AVP 2 AVP N Session-ID 1 Session-ID K Diameter Hdr GP Session-ID Session-ID 1 AVP 1.1 AVP 1.2 AVP 1.N Session-ID K AVP K.1 AVP K.2 AVP K.N

  5. Valuable & Positive Feedback • More use cases and enlarged scope • GP Session has value, but represents a new application • Platform for specification: DIME or alternative group • Good idea, but overloading only 3GPP habit • New messages as alternative • GP Session has clear rules, but other SDOs (TISPAN) just ignore the Session ID • Enlarge the scope of the idea to address also signaling without Session ID • Focus on grouping for bulk signaling

  6. What‘s Next? • Proposal to split the current draft • Target 2 separate documents • Approach meets all comments • (1) Diameter GPS • Focus on the use of a shared Session ID • Extension to Diameter base or New Application • May come with other functions • Query, State Restoration, ... • (2) Coding Options for bulk signaling • Enables use with other Diameter signaling • No limitation to Session ID based messages

  7. What‘s Next? • Interest in working on this? • Thanks for all comments !

  8. Appendix

  9. Idea behind the GP Session (1/2) • Eshablish a dedicated session (and Session-ID) to signal multi-user context (bulk signaling)  GP Session • Clarification: GP Session-ID does not identify a group of users! • GP Session-ID.. • .. allows the re-use of available commands (e.g. STR), which mandate a single Session-ID AVP, to signal attribues/values applying to multiple users • RFC3588: Single Session-ID AVP at fixed location (after Diameter header) identifies the user where subsequent attribute/values apply to • .. indicates that attributes/values apply to a group of users or all users! • .. avoids specification of new command codes and formats for bulk signaling

  10. Again: Use cases • Bulk signaling, e.g. • Bulk Session Termination using STR • Bulk policy enforcement • Recovery from total/partial Diameter node failure Server states restoration Group policy enforcement server server Req(multiple users [failed_server_id]) Req(multiple users, context1, context2, ...contextN) Resp (multiple users,context1, context2,... contextN) client client PCEF data traffic Policy Enforcement

  11. Stepwise realization of the extended session concept Deployment-specificguidelines forbulk signaling Specify GP Sessionextension Bulk-signaling operation andextensions specified in Applications Deployment by usingRFC4006+ and RFC4005+ Deployment-specific guidelines and specification (e.g. By 3GPP) NASREQRFC4005 BulkExt. BulkExt. NASREQRFC4005+ Credit ControlRFC4006 Credit ControlRFC4006+ GPS GPS Diameter Base RFC3588 Diameter Base RFC3588

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