Presence service is a
network service
In computer networking, a network service is an application running at the network application layer and above, that provides data storage, manipulation, presentation, communication or other capability which is often implemented using a client� ...
which accepts, stores and distributes
presence information In computer and telecommunications networks, presence information is a status indicator that conveys ability and willingness of a potential communication partner—for example a user—to communicate. A user's client provides 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.
Functional entities to support presence service
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.
See also
*
Unified communications
Unified communications (UC) is a business and marketing concept describing the integration of enterprise communication services such as instant messaging (chat), presence information, voice (including IP telephony), mobility features (including ex ...
References
*Day, M., J. Rosenberg, and H. Sugano. "A Model for Presence and Instant Messaging." RFC 2778. February 2000.
TS 23.141Open Mobile Alliance - Presence Enabler
Computer networking
{{Compu-network-stub