Evaluating Congestion Control for Interactive Real-time Media
draft-ietf-rmcat-eval-criteria-00

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Last updated 2014-01-31
Replaces draft-singh-rmcat-cc-eval
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RMCAT WG                                                        V. Singh
Internet-Draft                                                    J. Ott
Intended status: Informational                          Aalto University
Expires: August 04, 2014                                January 31, 2014

     Evaluating Congestion Control for Interactive Real-time Media
                   draft-ietf-rmcat-eval-criteria-00

Abstract

   The Real-time Transport Protocol (RTP) is used to transmit media in
   telephony and video conferencing applications.  This document
   describes the guidelines to evaluate new congestion control
   algorithms for interactive point-to-point real-time media.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on August 04, 2014.

Copyright Notice

   Copyright (c) 2014 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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Singh & Ott             Expires August 04, 2014                 [Page 1]
Internet-Draft  Evaluating Congestion Control for RMCAT     January 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Metrics . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  RTP Log Format  . . . . . . . . . . . . . . . . . . . . .   5
   4.  Guidelines  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Avoiding Congestion Collapse  . . . . . . . . . . . . . .   5
     4.2.  Stability . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  Media Traffic . . . . . . . . . . . . . . . . . . . . . .   6
     4.4.  Start-up Behaviour  . . . . . . . . . . . . . . . . . . .   6
     4.5.  Diverse Environments  . . . . . . . . . . . . . . . . . .   6
     4.6.  Varying Path Characteristics  . . . . . . . . . . . . . .   7
     4.7.  Reacting to Transient Events or Interruptions . . . . . .   7
     4.8.  Fairness With Similar Cross-Traffic . . . . . . . . . . .   7
     4.9.  Impact on Cross-Traffic . . . . . . . . . . . . . . . . .   7
     4.10. Extensions to RTP/RTCP  . . . . . . . . . . . . . . . . .   8
   5.  Minimum Requirements for Evaluation . . . . . . . . . . . . .   8
   6.  Evaluation Parameters . . . . . . . . . . . . . . . . . . . .   8
     6.1.  Bottleneck Traffic Flows  . . . . . . . . . . . . . . . .   8
     6.2.  Access Links  . . . . . . . . . . . . . . . . . . . . . .   9
     6.3.  Example Bottleneck Link Parameters  . . . . . . . . . . .   9
     6.4.  DropTail Router Queue Parameters  . . . . . . . . . . . .  10
     6.5.  Media Flow Parameters . . . . . . . . . . . . . . . . . .  11
     6.6.  Cross-traffic Parameters  . . . . . . . . . . . . . . . .  11
   7.  Status of Proposals . . . . . . . . . . . . . . . . . . . . .  11
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   10. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  12
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     12.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Appendix A.  Application Trade-off  . . . . . . . . . . . . . . .  14
     A.1.  Measuring Quality . . . . . . . . . . . . . . . . . . . .  14
   Appendix B.  Proposal to evaluate          Self-fairness of RMCAT
                congestion control algorithm . . . . . . . . . . . .  14
     B.1.  Evaluation Parameters . . . . . . . . . . . . . . . . . .  15
       B.1.1.  Media Traffic Generator . . . . . . . . . . . . . . .  15
       B.1.2.  Bottleneck Link Bandwidth . . . . . . . . . . . . . .  16
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