I-D ACTION:draft-ash-e2e-vompls-hdr-compress-01.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: End-to-End VoIP over MPLS Header Compression
	Author(s)	: J. Ash, B. Goode
	Filename	: draft-ash-e2e-vompls-hdr-compress-01.txt
	Pages		: 0
	Date		: 2003-3-6
	
VoIP over MPLS typically uses the encapsulation voice/RTP/UDP/IP/MPLS.  
For an MPLS VPN, the packet header is at least 48 bytes, while the voice 
payload is typically no more than 30 bytes.  VoIP over MPLS header 
compression can significantly reduce the VoIP overhead through various 
compression mechanisms.  This is important on access links where 
bandwidth is scarce, and can be important on backbone facilities, 
especially where costs are high (e.g., some global cross-sections).  In 
this draft we propose to use RSVP extensions to signal the header 
compression context and other control messages between the ingress and 
egress LSR.  We provide two approaches to determining the header 
compression context: a) re-use the methods in cRTP to determine the 
context, and b) re-use the methods in Swallow's and Berger's 'simple' 
approach to determine the context.

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