Presence service
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Presence service is a network service which accepts, stores and distributes presence information.
Presence service may be implemented as a single server or have an internal structure involving multiple servers and proxies. There may be complex patterns of redirection and proxying while retaining logical connectivity to a single presence service. Also presence service may be implemented as direct communication among presentity and watchers, i.e. server is not required.
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[edit] Functional Entities To Support Presence service
[edit] Presence server
The Presence Server, that reside in the presentity's home network, is able to receive and manage presence information. It is a SIP Application Server and is located using SIP URLs.
[edit] See also
[edit] References
- Day, M., J. Rosenberg, and H. Sugano. "A Model for Presence and Instant Messaging." RFC 2778. February 2000.
- TS 23.141
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