Random Linear Codes (RLC) Forward Error Correction (FEC) Scheme for FECFRAME
draft-roca-tsvwg-rlc-fec-scheme-00

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TSVWG                                                            V. Roca
Internet-Draft                                                     INRIA
Intended status: Standards Track                        February 7, 2017
Expires: August 11, 2017

  Random Linear Codes (RLC) Forward Error Correction (FEC) Scheme for
                                FECFRAME
                   draft-roca-tsvwg-rlc-fec-scheme-00

Abstract

   This document describes a fully-specified FEC scheme for the
   convolutional Random Linear Codes (RLC) over GF(2^^m), where m equals
   1 (binary case), 4 or 8, that can be used to protect arbitrary media
   streams along the lines defined by FECFRAME extended to convolutional
   codes.  These convolutional FEC codes rely on an encoding window that
   slides over the source symbols, generating new repair symbols
   whenever needed.  Compared to block FEC codes, these convolutional
   FEC codes offer key advantages in terms of reduced FEC-related
   latency while often providing improved erasure recovery capabilities.

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Roca                     Expires August 11, 2017                [Page 1]
Internet-Draft               RLC FEC Scheme                February 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Limits of Block Codes with Real-Time Flows  . . . . . . .   3
     1.2.  Lower Latency and Better Protection with RLC
           Convolutional Codes . . . . . . . . . . . . . . . . . . .   3
     1.3.  Small Transmission Overheads with the RLC FEC Scheme  . .   4
     1.4.  Document Organization . . . . . . . . . . . . . . . . . .   5
   2.  Definitions and Abbreviations . . . . . . . . . . . . . . . .   5
   3.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  RLC parameters derivation . . . . . . . . . . . . . . . .   6
     3.2.  ADU, ADUI and Source Symbols Mappings . . . . . . . . . .   7
     3.3.  Encoding Window Management  . . . . . . . . . . . . . . .   8
     3.4.  Pseudo-Random Number Generator  . . . . . . . . . . . . .   9
     3.5.  Coding Coefficients Generation Function . . . . . . . . .  10
   4.  RLC FEC Scheme for Arbitrary ADU Flows  . . . . . . . . . . .  12
     4.1.  Formats and Codes . . . . . . . . . . . . . . . . . . . .  12
       4.1.1.  FEC Framework Configuration Information . . . . . . .  12
       4.1.2.  Explicit Source FEC Payload ID  . . . . . . . . . . .  13
       4.1.3.  Repair FEC Payload ID . . . . . . . . . . . . . . . .  13
       4.1.4.  Additional Procedures . . . . . . . . . . . . . . . .  14
   5.  FEC Code Specification  . . . . . . . . . . . . . . . . . . .  15
   6.  Implementation Status . . . . . . . . . . . . . . . . . . . .  15
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   8.  Operations and Management Considerations  . . . . . . . . . .  16
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  16
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  16
     11.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Appendix A.  Decoding Beyond Maximum Latency Optimization . . . .  18
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction
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