Simple LDPC-Staircase Forward Error Correction (FEC) Scheme for FECFRAME
draft-ietf-fecframe-ldpc-02

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Document Type Active Internet-Draft (fecframe WG)
Last updated 2012-10-01 (latest revision 2012-03-08)
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FecFrame                                                         V. Roca
Internet-Draft                                                     INRIA
Intended status: Standards Track                               M. Cunche
Expires: September 9, 2012                                         NICTA
                                                                J. Lacan
                                                          ISAE/LAAS-CNRS
                                                           March 8, 2012

Simple LDPC-Staircase Forward Error Correction (FEC) Scheme for FECFRAME
                      draft-ietf-fecframe-ldpc-02

Abstract

   This document describes a fully-specified simple FEC scheme for LDPC-
   Staircase codes that can be used to protect media streams along the
   lines defined by the FECFRAME framework.  These codes have many
   interesting properties: they are systematic codes, they perform close
   to ideal codes in many use-cases and they also feature very high
   encoding and decoding throughputs.  LDPC-Staircase codes are
   therefore a good solution to protect a single high bitrate source
   flow, or to protect globally several mid-rate flows within a single
   FECFRAME instance.  They are also a good solution whenever the
   processing load of a software encoder or decoder must be kept to a
   minimum.

Status of this Memo

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Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Roca, et al.            Expires September 9, 2012               [Page 1]
Internet-Draft      Simple LDPC-Staircase FEC Scheme          March 2012

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Definitions Notations and Abbreviations  . . . . . . . . . . .  4
     3.1.  Definitions  . . . . . . . . . . . . . . . . . . . . . . .  4
     3.2.  Notations  . . . . . . . . . . . . . . . . . . . . . . . .  6
     3.3.  Abbreviations  . . . . . . . . . . . . . . . . . . . . . .  7
   4.  Common Procedures Related to the ADU Block and Source
       Block Creation . . . . . . . . . . . . . . . . . . . . . . . .  7
     4.1.  Restrictions . . . . . . . . . . . . . . . . . . . . . . .  7
     4.2.  ADU Block Creation . . . . . . . . . . . . . . . . . . . .  7
     4.3.  Source Block Creation  . . . . . . . . . . . . . . . . . .  9
   5.  LDPC-Staircase FEC Scheme for Arbitrary ADU Flows  . . . . . . 10
     5.1.  Formats and Codes  . . . . . . . . . . . . . . . . . . . . 10
       5.1.1.  FEC Framework Configuration Information  . . . . . . . 10
       5.1.2.  Explicit Source FEC Payload ID . . . . . . . . . . . . 12
       5.1.3.  Repair FEC Payload ID  . . . . . . . . . . . . . . . . 13
     5.2.  Procedures . . . . . . . . . . . . . . . . . . . . . . . . 14
     5.3.  FEC Code Specification . . . . . . . . . . . . . . . . . . 14
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 14
     6.1.  Attacks Against the Data Flow  . . . . . . . . . . . . . . 14
       6.1.1.  Access to Confidential Content . . . . . . . . . . . . 15
       6.1.2.  Content Corruption . . . . . . . . . . . . . . . . . . 15
     6.2.  Attacks Against the FEC Parameters . . . . . . . . . . . . 15
     6.3.  When Several Source Flows are to be Protected Together . . 16
     6.4.  Baseline Secure FEC Framework Operation  . . . . . . . . . 16
   7.  Operations and Management Considerations . . . . . . . . . . . 16
     7.1.  Operational Recommendations  . . . . . . . . . . . . . . . 16
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 18
   9.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 18
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