FEC Framework (fecframe)
------------------------

Charter
Last Modified: 2006-05-02

Current Status: Active Working Group

Chair(s):
    Greg Shepherd  <[email protected]>
    Marshall Eubanks  <[email protected]>

Transport Area Director(s):
    Magnus Westerlund  <[email protected]>
    Lars Eggert  <[email protected]>

Transport Area Advisor:
    Magnus Westerlund  <[email protected]>

Mailing Lists:
    General Discussion:[email protected]
    To Subscribe:      https://www1.ietf.org/mailman/listinfo/fecframe
    Archive:           http://www1.ietf.org/mail-archive/web/fecframe/current/index.html

Description of Working Group:

The object of this group is to develop standards for using forward
error correction (FEC) codes with applications in the Internet to
provide protection against packet loss. The group will develop a
framework for application of FEC codes to arbitrary packet flows over
unreliable transport protocols over both IP multicast and unicast. The
group will build on the work of the RMT working group in the form of
the FEC Building Block developed there to ensure that the framework
developed can support multiple FEC codes and maintain independence
between FEC codes and content delivery protocols. Note: framework
here is a protocol framework, with a design to be determined, but
suitable for interoperable implementations. It is not used in the
sense often used by IETF of a document akin to requirements.

A primary objective of this framework is to support FEC for streaming
media. The group will coordinate closely with AVT and MMUSIC working
groups to ensure that this use-case is fully specified both in terms of
interactions with RTP/RTCP and application layer signalling. The group
will also coordinate with the DCCP working group, at least,
considering that transport's role in streaming media.

The group will work with the RMT working group to ensure that the FEC
Building Block defined in RMT supports both the RMT use-cases (object
delivery over multicast) and the more general FEC protection of IP
flows over unreliable unicast and multicast transport. The group will
also consider developing its charter to include for proposals for
standardization of specific FEC codes - taking on this work from the
RMT working group - including consideration of their areas of
applicability and generality.

Specification of hybrid schemes involving both retransmission and
forward error correction will be out of scope of the group. However the
group should consider of whether work on such schemes should be
considered in a future phase.

Goals and Milestones:

  Nov 2006       Working Group consensus on requirements and their
               prioritization for the FEC protocol framework

  Mar 2007       Completed selection of solution to develop and mature

  Nov 2007       FEC Streaming Framework submitted as Proposed Standard

  Nov 2007       FEC framework requirements submitted as Informational

  Mar 2008       Usage of FEC framework with RTP submitted as Proposed Standard

  Mar 2008       FEC framework signalling specification submitted as Proposed
               Standard

  Mar 2008       Discuss re-chartering


Internet-Drafts:

Posted Revised         I-D Title   <Filename>
------ ------- --------------------------------------------
Jul 2006 Dec 2007   <draft-ietf-fecframe-req-02.txt>
               FECFRAME requirements

Feb 2007 Nov 2007   <draft-ietf-fecframe-framework-01.txt>
               Forward Error Correction (FEC) Framework

Feb 2008 Feb 2008   <draft-ietf-fecframe-sdp-elements-00.txt>
               SDP Elements for FEC Framework

Request For Comments:

 None to date.

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