Name: draft-ietf-simple-partial-publish-01
Title: Partial Publication of Presence Information
State: Active
Authors: Mikko Lonnfors
Group: SIP for Instant Messaging and Presence Leveraging Extensions (simple)
Date: 2004-10-28
Session Initiation Protocol (SIP) Extension for Event State Publication
describes a mechanism with which a presence user agent is able to publish
presence information to a presence agent. Using the Presence Information
Data Format (PIDF), each presence publication contains full state,
regardless of how much of that information has actually changed since the
previous update. As a consequence, updating a sizeable presence document
with small changes bear a considerable overhead and is therefore
inefficient. Especially with low bandwidth and high latency links, this can
constitue a considerable burden to the system. This memo defines a solution
that aids in reducing the impact of those constraints and increases
transport efficiency by introducing a mechanism that allows for publication
of partial presence information.
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