The MPLS WG Archive

[Colin Perkins <csp@csperkins.org>]

Folks,

I'm happy that there is interest in this protocol, however I would like to
remind folks that we have not yet agreed on the requirements documents, or
decided the appropriate home for this work. At the risk of delaying this
work for a few weeks, could we first make sure there is consensus that the
requirements are appropriate, before trying to build a protocol that
addresses them?

Colin



--> "Ash, Gerald R (Jerry), ALABS" <gash@att.com> writes:
> All,
> 
> Please review and comment on 'Protocol Extensions for ECRTP over MPLS'
> http://www.ietf.org/internet-drafts/draft-ash-avt-ecrtp-over-mpls-protocol-00.txt.
>  The protocol extensions enable the use of MPLS to route enhanced
>  compressed RTP (ECRTP) compressed packets over an MPLS LSP without
>  compression/decompression cycles at each router.
> 
> The proposed extensions are based on the requirements documented in
> 'Requirements for ECRTP over MPLS'
> http://www.ietf.org/internet-drafts/draft-ash-avt-ecrtp-over-mpls-reqs-01.txt.
> 
> Thanks,
> Jerry
> 
> -----Original Message-----
> From: Internet-Drafts@ietf.org [mailto:Internet-Drafts@ietf.org]
> Sent: Thursday, February 05, 2004 3:43 PM
> Subject: I-D ACTION:draft-ash-avt-ecrtp-over-mpls-protocol-00.txt
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> 
> 
> 	Title		: Protocol Extensions for ECRTP over MPLS
> 	Author(s)	: J. Ash
> 	Filename	: draft-ash-avt-ecrtp-over-mpls-protocol-00.txt
> 	Pages		: 0
> 	Date		: 2004-2-5
> 	
> VoIP typically uses the encapsulation voice/RTP/UDP/IP. When MPLS labels 
> are added, this becomes voice/RTP/UDP/IP/MPLS-labels. For an MPLS VPN, 
> the packet header is at least 48 bytes, while the voice payload is often 
> no more than 30 bytes, for example. VoIP header compression can 
> significantly reduce the VoIP overhead through various compression 
> mechanisms, such as enhanced compressed RTP (ECRTP). We consider using 
> MPLS to route ECRTP compressed packets over an MPLS LSP without 
> compression/decompression cycles at each router. Such an ECRTP over MPLS 
> capability can increase the bandwidth efficiency as well as processing 
> scalability of the maximum number of simultaneous VoIP flows that use 
> header compression at each router.  In this draft we propose to use 
> RSVP-TE extensions to signal the header compression context and other 
> control messages between the ingress and egress LSR.  We re-use the 
> methods in ECRTP to determine the context.
> 
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-ash-avt-ecrtp-over-mpls-protocol-00.txt.
> 
> _______________________________________________
> Audio/Video Transport Working Group
> avt@ietf.org
> https://www1.ietf.org/mailman/listinfo/avt


-- 
Colin Perkins
http://csperkins.org/