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[AVTCORE] multi session draft-ejzak-avtcore-rtp-subsessions-00.txt

"Ejzak, Richard P (Richard)" <richard.ejzak@alcatel-lucent.com> Sun, 03 June 2012 23:08 UTC

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From: "Ejzak, Richard P (Richard)" <richard.ejzak@alcatel-lucent.com>
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Subject: [AVTCORE] multi session draft-ejzak-avtcore-rtp-subsessions-00.txt
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http://www.ietf.org/id/draft-ejzak-avtcore-rtp-subsessions-00.txt

In response to the chairs' request for additional input on the multi session issue, I have submitted this draft for your consideration.  There are superficial similarities with an expired draft from last year in http://tools.ietf.org/id/draft-rosenberg-rtcweb-rtpmux-00.txt, but my draft has a different take on the use of SSRC as the basis for multi session multiplexing that I think is superior and worthy of consideration as a potential replacement for BUNDLE and/or SHIM.  Please comment.

Richard

-----Original Message-----
From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] 
Sent: Sunday, June 03, 2012 5:16 PM
To: Ejzak, Richard P (Richard)
Subject: New Version Notification for draft-ejzak-avtcore-rtp-subsessions-00.txt

A new version of I-D, draft-ejzak-avtcore-rtp-subsessions-00.txt has been successfully submitted by Richard Ejzak and posted to the IETF repository.

Filename:	 draft-ejzak-avtcore-rtp-subsessions
Revision:	 00
Title:		 Media multiplexing with Real-time Transport Protocol (RTP) subsessions
Creation date:	 2012-06-04
WG ID:		 Individual Submission
Number of pages: 9

Abstract:
   This document describes a means of multiplexing RTP streams having
   different media types within a single transport connection and how to
   represent this multiplexing option in SDP.  This mechanism is an
   alternative to the BUNDLE and SHIM proposals currently under active
   consideration in AVTCORE.  Instead of adding an extra multiplexing
   header as in SHIM to allow multiple RTP sessions within a single
   transport connection, or using the payload type field to separate
   different media streams within a single RTP session, this document
   describes how to partition the existing SSRC space to create RTP
   subsessions from a single RTP session.  A filter can be used to
   identify each RTP subsession for different QoS handling as necessary.
   RTP subsessions can be treated like RTP sessions with a few
   restrictions.  In particular, SSRC mapping may be needed when
   forwarding RTP streams into an RTP subsession to avoid SSRC
   conflicts, but there are few use cases in which this limitation is a
   concern and RTP subsessions can be disabled if necessary.

                                                                                  


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