FEC Framework (fecframe) ------------------------ Charter Last Modified: 2008-12-16 Current Status: Active Working Group Chair(s): Greg Shepherd Marshall Eubanks Transport Area Director(s): Magnus Westerlund Lars Eggert Transport Area Advisor: Magnus Westerlund Mailing Lists: General Discussion:fecframe@ietf.org To Subscribe: https://www.ietf.org/mailman/listinfo/fecframe Archive: http://www.ietf.org/mail-archive/web/fecframe 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: Posted Revised I-D Title ------ ------- -------------------------------------------- Feb 2007 Jul 2009 Forward Error Correction (FEC) Framework Feb 2008 Jun 2009 SDP Elements for FEC Framework Aug 2008 May 2009 RTP Payload Format for 1-D Interleaved Parity FEC Aug 2008 Jan 2009 DVB Application-Layer Hybrid FEC Protection Oct 2008 Mar 2009 Pseudo Content Delivery Protocol (CDP) for Protecting Multiple Source Flows in FEC Framework Oct 2008 May 2009 RTP Payload Format for Non-Interleaved and Interleaved Parity FEC Mar 2009 Mar 2009 RTP Payload Format for Raptor FEC Request For Comments: None to date.