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) : M. Lonnfors, et al.
Filename : draft-ietf-simple-partial-publish-03.txt
Pages : 16
Date : 2005-7-20
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 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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