I-D Action:draft-ietf-simple-partial-publish-07.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the SIP for Instant Messaging and Presence Leveraging Extensions Working Group of the IETF.

	Title           : Publication of Partial Presence Information
	Author(s)       : A. Niemi, et al.
	Filename        : draft-ietf-simple-partial-publish-07.txt
	Pages           : 16
	Date            : 2008-02-20

The 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 bears 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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