Report from the IAB/IRTF Workshop on Congestion Control for Interactive Real-Time Communication
draft-iab-cc-workshop-report-01

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Document Type Active Internet-Draft (individual)
Last updated 2014-05-12 (latest revision 2013-04-02)
Replaces draft-tschofenig-cc-workshop-report
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Network Working Group                                      H. Tschofenig
Internet-Draft                                                 L. Eggert
Intended status: Informational                                 Z. Sarker
Expires: October 4, 2013                                   April 2, 2013

Report from the IAB/IRTF Workshop on Congestion Control for Interactive
                        Real-Time Communication
                  draft-iab-cc-workshop-report-01.txt

Abstract

   This document provides a summary of the IAB/IRTF Workshop on
   'Congestion Control for Interactive Real-Time Communication', which
   took place in Vancouver, Canada, on July 28, 2012.  The main goal of
   the workshop was to foster a discussion on congestion control
   mechanisms for interactive real-time communication.  This report
   summarizes the discussions and lists recommendations to the Internet
   Engineering Task Force (IETF) community.

   The views and positions in this report are those of the workshop
   participants and do not necessarily reflect the views and positions
   of the authors, the Internet Architecture Board (IAB) or the Internet
   Research Task Force (IRTF).

Status of this Memo

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   This Internet-Draft will expire on October 4, 2013.

Copyright Notice

   Copyright (c) 2013 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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   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
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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Workshop Structure . . . . . . . . . . . . . . . . . . . . . .  5
     2.1.  History and Current Challenges . . . . . . . . . . . . . .  5
     2.2.  Simulations and Measurements . . . . . . . . . . . . . . .  7
     2.3.  Design Aspects of Problems and Solutions . . . . . . . . .  9
   3.  Recommendations  . . . . . . . . . . . . . . . . . . . . . . . 14
     3.1.  Changes to Network Infrastructure  . . . . . . . . . . . . 14
     3.2.  Avoiding Self-Inflicted Queuing  . . . . . . . . . . . . . 15
   4.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 18
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 19
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 20
   7.  Informative References . . . . . . . . . . . . . . . . . . . . 21
   Appendix A.  Program Committee . . . . . . . . . . . . . . . . . . 25
   Appendix B.  Workshop Material . . . . . . . . . . . . . . . . . . 26
   Appendix C.  Accepted Position Papers  . . . . . . . . . . . . . . 27
   Appendix D.  Workshop Participants . . . . . . . . . . . . . . . . 30
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 33

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1.  Introduction

   Any application that sends significant amounts of data over the
   Internet is expected to implement reasonable congestion control
   behavior.  The goals for congestion control are well understood and
   documented in RFC 2914 [1] and RFC 5405 [2]:

   1.  Preventing congestion collapse.

   2.  Allowing multiple flows to share the network fairly.

   The Internet has been used for interactive real-time communication
   for decades, most of which is being transmitted using Real-Time
   Transport Protocol (RTP) over UDP, often over provisioned capacity
   and/or using only rudimentary congestion control mechanisms.  In
   2004, the Internet Architecture Board (IAB) raised concerns regarding
   possibilities of a congestion collapse due to a rapid growth in real-
   time voice traffic that does not practice end-to-end congestion
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