Conferencing based on SIP, SDP, and other protocols; Functional models, information flows and protocol details
The present document is a temporary container for the functional models, flows and protocol details for the conferencing service within the IP Multimedia Core Network subsystem (IMS) based on the Session Initiation Protocol (SIP), SIP Events, the Session Description Protocol (SDP) , the Conference Policy Control Protocol (CPCP) and other protocols. The document covers also instant messaging conferences. The contents of this report when stable will be moved into the Technical Specification 3GPP TS 23.218 [3], 3GPP TS 24.228 [4] and 3GPP TS 24.229 [5].
Editor's note: This TR will also include information on conference floor control, which will be using different protocols than SIP and SDP (see clause 9), as e.g. described in draft-wu-sipping-floor-control-04.txt. This information might be moved either to TS 24.229 or to another 3GPP document.
Editor's note: The "other protocols" that are mentioned here need to be listed in detail, in order to replace the phrase "other protocols". This TR only covers protocols in the scope of CN1.
Editor's note: The work on instant messaging conferences is related to the work under the work item for IMS messaging, WID 11039, and the decision is to be made on contributed text as in which document it will appear.
Editor's note: The ongoing work on floor control and conferencing in CN5 needs to be taken into account.
This document does not cover the signalling between a MRFC and a MRFP.
Where possible the present document specifies the requirements for this protocol by reference to specifications produced by the IETF within the scope of SIP, SIP Events, SDP and other protocols. Where this is not possible, extensions to SIP are defined within the present document. The document has therefore been structured in order to allow both forms of specification.
The present document includes information applicable to network operators, service providers and manufacturers.
Editor's note: Agreed material is held in this TR for an interim period of time, and the material transferred into release 6 versions of 23.218, 24.228 and 24.229 at a later time. This has the advantage that:
It creates a location where the material may stabilise outside a document under CR control, thus fulfilling the function of the original annexes in the IN CN subsystem documents.
It avoids the need to create release 6 mirror CRs for all release 5 changes to the IM CN subsystem.
This TR will not be published.