FEC Framework (fecframe)

Last Modified: 2008-03-03

Additional information is available at tools.ietf.org/wg/fecframe

Chair(s):

  • Greg Shepherd <gjshep@gmail.com>

  • Marshall Eubanks <tme@multicasttech.com>

    Transport Area Director(s):

  • Magnus Westerlund <magnus.westerlund@ericsson.com>
  • Lars Eggert <lars.eggert@nokia.com>

    Transport Area Advisor:

  • Magnus Westerlund <magnus.westerlund@ericsson.com>

    Mailing Lists:

    General Discussion: fecframe@ietf.org
    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:

    Done  Working Group consensus on requirements and their prioritization for the FEC protocol framework
    Done  Completed selection of solution to develop and mature
    Done  FEC framework requirements WG soft-freeze
    Done  FEC Streaming Framework WG soft-freeze
    Mar 2008  FEC Grouping informational draft submitted to MMUSIC
    Nov 2008  FEC Streaming Framework submitted as Proposed Standard
    Nov 2008  FEC framework requirements submitted as Proposed Standard
    Nov 2008  Usage of FEC framework with RTP submitted as Proposed Standard
    Nov 2008  FEC SDP Elements submitted as Proposed Standard
    Nov 2008  Discuss re-chartering

    Internet-Drafts:

    FECFRAME requirements (19690 bytes)
    Forward Error Correction (FEC) Framework (58451 bytes)
    SDP Elements for FEC Framework (44423 bytes)

    No Request For Comments

    IETF Secretariat - Please send questions, comments, and/or suggestions to ietf-web@ietf.org.

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