Presence service based on Session Initiation Protocol (SIP); Functional models, information flows and protocol details
The present document is a temporary container for the functional models, flows and protocol details for the presence service within the IP Multimedia (IM) Core Network (CN) subsystem based on the Session Initiation Protocol (SIP) and SIP Events.
Where possible the present document specifies the requirements for this protocol by reference to specifications produced by the IETF within the scope of SIP and SIP Events. 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. 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.
This TR will not be published.