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 TS 23.218
, TS 24.228
and TS 24.229
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.