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Asynchronous Layered Coding (ALC) Protocol Instantiation
RFC 5775

Document type: RFC - Proposed Standard (April 2010)
Obsoletes RFC 3450
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 5775 (Proposed Standard)
Responsible AD: Magnus Westerlund
Send notices to: rmt-chairs@tools.ietf.org, draft-ietf-rmt-pi-alc-revised@tools.ietf.org

Internet Engineering Task Force (IETF)                           M. Luby
Request for Comments: 5775                                     M. Watson
Obsoletes: 3450                                              L. Vicisano
Category: Standards Track                                 Qualcomm, Inc.
ISSN: 2070-1721                                               April 2010

        Asynchronous Layered Coding (ALC) Protocol Instantiation

Abstract

   This document describes the Asynchronous Layered Coding (ALC)
   protocol, a massively scalable reliable content delivery protocol.
   Asynchronous Layered Coding combines the Layered Coding Transport
   (LCT) building block, a multiple rate congestion control building
   block and the Forward Error Correction (FEC) building block to
   provide congestion controlled reliable asynchronous delivery of
   content to an unlimited number of concurrent receivers from a single
   sender.  This document obsoletes RFC 3450.

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/rfc5775.

Copyright Notice

   Copyright (c) 2010 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.

Luby, et al.                 Standards Track                    [Page 1]
RFC 5775               ALC Protocol Instantiation             April 2010

   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
     1.1.  Delivery Service Models  . . . . . . . . . . . . . . . . .  4
     1.2.  Scalability  . . . . . . . . . . . . . . . . . . . . . . .  4
     1.3.  Environmental Requirements and Considerations  . . . . . .  5
   2.  Architecture Definition  . . . . . . . . . . . . . . . . . . .  5
     2.1.  LCT Building Block . . . . . . . . . . . . . . . . . . . .  7
     2.2.  Multiple Rate Congestion Control Building Block  . . . . .  9
     2.3.  FEC Building Block . . . . . . . . . . . . . . . . . . . . 10
     2.4.  Session Description  . . . . . . . . . . . . . . . . . . . 11
     2.5.  Packet Authentication Building Block . . . . . . . . . . . 12
   3.  Conformance Statement  . . . . . . . . . . . . . . . . . . . . 12
   4.  Functionality Definition . . . . . . . . . . . . . . . . . . . 13
     4.1.  Packet Format Used by ALC  . . . . . . . . . . . . . . . . 13
     4.2.  LCT Header Extension Fields  . . . . . . . . . . . . . . . 14
     4.3.  Sender Operation . . . . . . . . . . . . . . . . . . . . . 15
     4.4.  Receiver Operation . . . . . . . . . . . . . . . . . . . . 15
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . . 16
     5.1.  Baseline Secure ALC Operation  . . . . . . . . . . . . . . 18
       5.1.1.  IPsec Approach . . . . . . . . . . . . . . . . . . . . 18
       5.1.2.  IPsec Requirements . . . . . . . . . . . . . . . . . . 19
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 21
   7.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 21
   8.  Changes from RFC 3450  . . . . . . . . . . . . . . . . . . . . 21
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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