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Session Description Protocol Elements for the Forward Error Correction (FEC) Framework
RFC 6364

Internet Engineering Task Force (IETF)                          A. Begen
Request for Comments: 6364                                         Cisco
Category: Standards Track                                   October 2011
ISSN: 2070-1721

             Session Description Protocol Elements for the
                Forward Error Correction (FEC) Framework

Abstract

   This document specifies the use of the Session Description Protocol
   (SDP) to describe the parameters required to signal the Forward Error
   Correction (FEC) Framework Configuration Information between the
   sender(s) and receiver(s).  This document also provides examples that
   show the semantics for grouping multiple source and repair flows
   together for the applications that simultaneously use multiple
   instances of the FEC Framework.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6364.

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Begen                        Standards Track                    [Page 1]
RFC 6364             SDP Elements for FEC Framework         October 2011

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1. Introduction ....................................................3
   2. Requirements Notation ...........................................3
   3. Forward Error Correction (FEC) and FEC Framework ................3
      3.1. Forward Error Correction (FEC) .............................3
      3.2. FEC Framework ..............................................4
      3.3. FEC Framework Configuration Information ....................4
   4. SDP Elements ....................................................5
      4.1. Transport Protocol Identifiers .............................6
      4.2. Media Stream Grouping ......................................6
      4.3. Source IP Addresses ........................................6
      4.4. Source Flows ...............................................6
      4.5. Repair Flows ...............................................7
      4.6. Repair Window ..............................................8
      4.7. Bandwidth Specification ....................................9
   5. Scenarios and Examples .........................................10
      5.1. Declarative Considerations ................................10
      5.2. Offer/Answer Model Considerations .........................10
   6. SDP Examples ...................................................11
      6.1. One Source Flow, One Repair Flow, and One FEC Scheme ......11
      6.2. Two Source Flows, One Repair Flow, and One FEC Scheme .....12
      6.3. Two Source Flows, Two Repair Flows, and Two FEC Schemes ...13
      6.4. One Source Flow, Two Repair Flows, and Two FEC Schemes ....14
   7. Security Considerations ........................................15
   8. IANA Considerations ............................................15
      8.1. Registration of Transport Protocols .......................15
      8.2. Registration of SDP Attributes ............................16

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