Basic Forward Error Correction (FEC) Schemes
RFC 5445
Network Working Group M. Watson
Request for Comments: 5445 Digital Fountain
Obsoletes: 3452, 3695 March 2009
Category: Standards Track
Basic Forward Error Correction (FEC) Schemes
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
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Abstract
This document provides Forward Error Correction (FEC) Scheme
specifications according to the Reliable Multicast Transport (RMT)
FEC building block for the Compact No-Code FEC Scheme, the Small
Block, Large Block, and Expandable FEC Scheme, the Small Block
Systematic FEC Scheme, and the Compact FEC Scheme. This document
obsoletes RFC 3695 and assumes responsibility for the FEC Schemes
defined in RFC 3452.
Watson Standards Track [Page 1]
RFC 5445 Basic FEC Schemes March 2009
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Requirements Notation . . . . . . . . . . . . . . . . . . . . 4
3. Compact No-Code FEC Scheme . . . . . . . . . . . . . . . . . . 4
3.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 4
3.2. Formats and Codes . . . . . . . . . . . . . . . . . . . . 4
3.2.1. FEC Payload ID(s) . . . . . . . . . . . . . . . . . . 4
3.2.2. FEC Object Transmission Information . . . . . . . . . 5
3.3. Procedures . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4. FEC Code Specification . . . . . . . . . . . . . . . . . . 7
3.4.1. Source Block Logistics . . . . . . . . . . . . . . . . 7
3.4.2. Sending and Receiving a Source Block . . . . . . . . . 8
4. Small Block, Large Block, and Expandable FEC Scheme . . . . . 9
4.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 9
4.2. Formats and Codes . . . . . . . . . . . . . . . . . . . . 9
4.2.1. FEC Payload ID(s) . . . . . . . . . . . . . . . . . . 9
4.2.2. FEC Object Transmission Information . . . . . . . . . 10
4.3. Procedures . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4. FEC Code Specification . . . . . . . . . . . . . . . . . . 12
5. Small Block Systematic FEC Scheme . . . . . . . . . . . . . . 12
5.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 12
5.2. Formats and Codes . . . . . . . . . . . . . . . . . . . . 12
5.2.1. FEC Payload ID(s) . . . . . . . . . . . . . . . . . . 12
5.2.2. FEC Object Transmission Information . . . . . . . . . 13
5.3. Procedures . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4. FEC Code Specification . . . . . . . . . . . . . . . . . . 15
6. Compact FEC Scheme . . . . . . . . . . . . . . . . . . . . . . 15
6.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 15
6.2. Formats and Codes . . . . . . . . . . . . . . . . . . . . 15
6.2.1. FEC Payload ID(s) . . . . . . . . . . . . . . . . . . 15
6.2.2. FEC Object Transmission Information . . . . . . . . . 15
6.3. Procedures . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4. FEC Code Specification . . . . . . . . . . . . . . . . . . 16
7. Security Considerations . . . . . . . . . . . . . . . . . . . 16
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 16
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
10. Changes from Schemes Defined in RFC 3452 and RFC 3695 . . . . 17
11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11.1. Normative References . . . . . . . . . . . . . . . . . . . 18
11.2. Informative References . . . . . . . . . . . . . . . . . . 18
Watson Standards Track [Page 2]
RFC 5445 Basic FEC Schemes March 2009
1. Introduction
The document specifies the following FEC Schemes according to the
specification requirements of the FEC building block [RFC5052]:
o Compact No-Code FEC Scheme
o Small Block, Large Block, and Expandable FEC Scheme
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