I-D ACTION:draft-hiller-rohc-gehco-00.txt

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	Title		: Good Enough Header COmpression (GEHCO)
	Author(s)	: T. Hiller, P. McCann
	Filename	: draft-hiller-rohc-gehco-00.txt
	Pages		: 16
	Date		: 20-Jul-00
	
The Robust Header Compression Working Group has embarked upon the
development and standardization of header compression schemes that
perform well over links with high error rates and long round-trip
times. The goal is that the schemes must perform well for cellular
links built using technologies such as WCDMA, EDGE, and CDMA-2000.
One way the group plans to achieve this is by maintaining
connections with other standardization organizations developing
cellular technology for IP, such as 3GPP and 3GPP-2, to ensure that
its output fulfills their requirements and will be put to good use.
Of particular importance to the 3GPP2 community is the spectral
efficiency of IP/UDP/RTP header compression for the voice over IP
application to mobiles. Currently, the ROHC Working Group is
focusing on compression schemes where the uncompressed header is
identical to the original header seen by the compressor. This may
be categorized as transparent compression. Transparent compression
results in additional header bytes being transported over-the-air.
3GPP2 carriers have indicated that no additional bytes may be
transported over-the-air for voice over IP, that is, that voice
over IP must have spectral efficiency comparable to legacy circuit
transport over-the-air. This draft proposes a specific scheme, Good
Enough Header Compression (GEHCO) that does not exactly reproduce
the IP/UDP/RTP header, but is otherwise

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