3 GPP Presence Requirements for Presence Service based
3 GPP Presence Requirements for Presence Service based on 3 GPP specifications and wireless environment characteristics draft-kiss-simple-presence-wirelessreqs-01 Krisztián Kiss <krisztian. kiss@nokia. com> Gábor Bajkó <gabor. bajko@nokia. com> IETF 55, Atlanta, USA
Changes on publishing reqs (compared to – 00) • Standardized publication mechanism • adding elements to the presence information as well as remove or modify existing elements of the presence information • Publishing from multiple PUAs • merge the information and resolve conflicts • discover and manipulate already existing elements of the presence information published by another PUAs • Feedback • feedback about the result of a publishing transaction: for the principal to know that the published doument was successfully composed • Efficient publishing of multimedia content (large size content) • update only the information that has changed
Changes on Subs and Not reqs • Filtering • watcher indicates rules for the information to be received (or not to be received) • presence information is constructed based on filtering request and authorization rules • PLS to construct and store appropriate filtering rules for URIs in the presencelist based on the watcher's filtering preferences • Efficiency • watcher to determine what presence information is available before fetching or subscribing to the presence information with values • receiving multimedia content • notification contains only the information that has changed status
Further changes on reqs • Presence Document • Semantics to the content of communication mean • voice, video, instant messaging, application • Multivalue concept • multiple instances of the semantically same presence information • different instances contain different values to be shown for different watchers • Authorization • Multiple sources: manage the rules from multiple sources. One source must be able to learn changes from other sources • Presencelist • creating presencelist, adding new URIs to an existing presencelist, modifying or removing existing URIs from an existing presencelist, or deleting a presencelist
Background • 3 GPP specifications • 3 GPP Presence Stage 1 specification: TS 22. 141 • 3 GPP Presence Stage 2 specification: TS 23. 141 • 3 GPP Presence Stage 3 specification: TR 24. 841 • 3 GPP Presence Work Item • Stage 3 work is expected to be finished by June 2003 • The document reflects opinions and comments from several delegates in the 3 GPP CN 1 WG
- Slides: 5