A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Instant Message Sessions in SIMPLE
Author(s) : B. Campbell, J. Rosenberg et. al.
Filename : draft-campbell-simple-im-sessions-01.txt
Pages : 40
Date : 2003-3-6
The SIP MESSAGE method is used to send instant messages, where each
message is independent of any other message. This is often called
pager-mode messaging, due to the fact that this model is similar to
that of most two-way pager devices. Another model is called
session-mode. In session-mode, the instant messages are part of a
media session that provides ordering, a security context, and other
functions. This media session is established using a SIP INVITE, just
as an audio or video session would be established.
This document describes a The Message Session Relay Protocol (MSRP),
a mechanism for transmitting session-mode messages with minimal relay
support. Additionally, this document describes using the SDP offer/
answer model to initiate such sessions.
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