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RESEND WITH CORRECTED ID VERSION: Protocol Action: 0-byte Support for R-mode in Link-Layer Assisted ROHC Profile to Proposed Standard
- To: IETF-Announce: ;
- Subject: RESEND WITH CORRECTED ID VERSION: Protocol Action: 0-byte Support for R-mode in Link-Layer Assisted ROHC Profile to Proposed Standard
- From: The IESG <email@example.com>
- Date: Tue, 10 Sep 2002 13:19:37 -0400
- Cc: RFC Editor <firstname.lastname@example.org>, Internet Architecture Board <email@example.com>, firstname.lastname@example.org
- Delivery-date: Tue, 10 Sep 2002 21:06:01 +0300
- Envelope-to: email@example.com
- Sender: firstname.lastname@example.org
The IESG has approved the Internet-Draft '0-byte Support for R-mode in
Link-Layer Assisted ROHC Profile'
<draft-ietf-rohc-rtp-lla-r-mode-03.txt> as a Proposed Standard.
The IESG also approved publication of Lower Layer Guidelines for Robust
RTP/UDP/IP Header Compression
<draft-ietf-rohc-rtp-lower-layer-guidelines-03.txt> as an Informational
These documents are the product of the Robust Header Compression
Working Group. The IESG contact persons are Allison Mankin and Scott
The "0-byte Support for R-mode in Extended Link-Layer Assisted RObust
Header Compression Profile" defines an additional mode of the profile
defined in "A Link-Layer Assisted ROHC Profile for IP/UDP/RTP" (now in
the RFC Editor's queue). That document specified zero-byte header
compression in order to avoid the single octet ROHC header in certain
older air interfaces from pushing a packet voice stream into the next
higher fixed packet size for the radio. The former document defined
the zero-byte operation for Unidirectional and Optimistic modes only
(U-mode and O-mode), but Reliable Bidirectional mode (R-mode) required
additional work. This specification completes the Link-Layer Assisted
0-byte profile with R-mode, with the result that the majority of
ROHC RTP packets can be sent out (on radio links with the defined
characteristics) with a header-free packet format during normal operation.
The "Lower Layer Guidelines for Robust RTP/UDP/IP Header Compression"
document describes requirements that RObust Header Compression puts on
lower layers, especially aimed at those who are engineering and deploying
emerging radio systems such as those specified by 3GPP, 3GPP2, ETSI, etc,
to simplify incorporation of ROHC technology, and limit the amount of
detail about the ROHC algorithms and protocols that need to be understood
by link layer designers or engineers. Both general guidelines and
guidelines specific for cellular systems are provided.
Working Group Summary
The working group supported the publication of both of these
These documents were reviewed for the IESG by Allison Mankin.
As noted, the Reliable-Mode specification was held in the WG
for extra rounds of review, and the working group and IETF
Last Calls did not raise issues.