Coupled congestion control for RTP media
draft-ietf-rmcat-coupled-cc-06

Document Type Active Internet-Draft (rmcat WG)
Last updated 2017-03-28
Replaces draft-welzl-rmcat-coupled-cc
Stream IETF
Intended RFC status Experimental
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RTP Media Congestion Avoidance Techniques (rmcat)               S. Islam
Internet-Draft                                                  M. Welzl
Intended status: Experimental                                S. Gjessing
Expires: September 29, 2017                           University of Oslo
                                                          March 28, 2017

                Coupled congestion control for RTP media
                     draft-ietf-rmcat-coupled-cc-06

Abstract

   When multiple congestion controlled RTP sessions traverse the same
   network bottleneck, combining their controls can improve the total
   on-the-wire behavior in terms of delay, loss and fairness.  This
   document describes such a method for flows that have the same sender,
   in a way that is as flexible and simple as possible while minimizing
   the amount of changes needed to existing RTP applications.  It
   specifies how to apply the method for the NADA congestion control
   algorithm, and provides suggestions on how to apply it to other
   congestion control algorithms.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on September 29, 2017.

Copyright Notice

   Copyright (c) 2017 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
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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Islam, et al.          Expires September 29, 2017               [Page 1]
Internet-Draft  Coupled congestion control for RTP media      March 2017

   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Limitations . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Architectural overview  . . . . . . . . . . . . . . . . . . .   5
   5.  Roles . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  SBD . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.2.  FSE . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     5.3.  Flows . . . . . . . . . . . . . . . . . . . . . . . . . .   8
       5.3.1.  Example algorithm 1 - Active FSE  . . . . . . . . . .   9
       5.3.2.  Example algorithm 2 - Conservative Active FSE . . . .  10
   6.  Application . . . . . . . . . . . . . . . . . . . . . . . . .  11
     6.1.  NADA  . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     6.2.  General recommendations . . . . . . . . . . . . . . . . .  11
   7.  Expected feedback from experiments  . . . . . . . . . . . . .  12
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  13
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  13
     11.2.  Informative References . . . . . . . . . . . . . . . . .  14
   Appendix A.  Application to GCC . . . . . . . . . . . . . . . . .  15
   Appendix B.  Scheduling . . . . . . . . . . . . . . . . . . . . .  16
   Appendix C.  Example algorithm - Passive FSE  . . . . . . . . . .  16
     C.1.  Example operation (passive) . . . . . . . . . . . . . . .  19
   Appendix D.  Change log . . . . . . . . . . . . . . . . . . . . .  23
     D.1.  draft-welzl-rmcat-coupled-cc  . . . . . . . . . . . . . .  23
       D.1.1.  Changes from -00 to -01 . . . . . . . . . . . . . . .  23
       D.1.2.  Changes from -01 to -02 . . . . . . . . . . . . . . .  23
       D.1.3.  Changes from -02 to -03 . . . . . . . . . . . . . . .  23
       D.1.4.  Changes from -03 to -04 . . . . . . . . . . . . . . .  24
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