Shared Bottleneck Detection for Coupled Congestion Control for RTP Media.
draft-hayes-rmcat-sbd-00

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Last updated 2014-10-10
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
RTP Media Congestion Avoidance                             D. Hayes, Ed.
Techniques                                            University of Oslo
Internet-Draft                                                 S. Ferlin
Intended status: Experimental                 Simula Research Laboratory
Expires: April 13, 2015                                         M. Welzl
                                                      University of Oslo
                                                        October 10, 2014

   Shared Bottleneck Detection for Coupled Congestion Control for RTP
                                 Media.
                        draft-hayes-rmcat-sbd-00

Abstract

   This document describes a mechanism to detect whether end-to-end data
   flows share a common bottleneck.  It relies on summary statistics
   that are calculated by a data receiver based on continuous
   measurements and regularly fed to a grouping algorithm that runs
   wherever the knowledge is needed.  This mechanism complements the
   coupled congestion control mechanism in draft-welzl-rmcat-coupled-cc.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 13, 2015.

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
   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

Hayes, et al.            Expires April 13, 2015                 [Page 1]
Internet-Draft         SBD for CCC with RTP Media           October 2014

   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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  The signals  . . . . . . . . . . . . . . . . . . . . . . .  3
       1.1.1.  Packet Loss  . . . . . . . . . . . . . . . . . . . . .  3
       1.1.2.  Packet Delay . . . . . . . . . . . . . . . . . . . . .  3
       1.1.3.  Path Lag . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  Parameter Values . . . . . . . . . . . . . . . . . . . . .  5
   3.  Mechanism  . . . . . . . . . . . . . . . . . . . . . . . . . .  5
     3.1.  Key metrics and their calculation  . . . . . . . . . . . .  6
       3.1.1.  Mean delay . . . . . . . . . . . . . . . . . . . . . .  6
       3.1.2.  Skewness Estimate  . . . . . . . . . . . . . . . . . .  7
       3.1.3.  Variance Estimate  . . . . . . . . . . . . . . . . . .  7
       3.1.4.  Oscilation Estimate  . . . . . . . . . . . . . . . . .  8
       3.1.5.  Packet loss  . . . . . . . . . . . . . . . . . . . . .  8
     3.2.  Flow Grouping  . . . . . . . . . . . . . . . . . . . . . .  8
       3.2.1.  Flow Grouping Algorithm  . . . . . . . . . . . . . . .  8
       3.2.2.  Using the flow group signal  . . . . . . . . . . . . .  9
   4.  Measuring OWD  . . . . . . . . . . . . . . . . . . . . . . . . 10
     4.1.  Time stamp resolution  . . . . . . . . . . . . . . . . . . 10
   5.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 11
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 11
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

Hayes, et al.            Expires April 13, 2015                 [Page 2]
Internet-Draft         SBD for CCC with RTP Media           October 2014

1.  Introduction

   In the Internet, it is not normally known if flows (e.g., TCP
   connections or UDP data streams) traverse the same bottlenecks.  Even
   flows that have the same sender and receiver may take different paths
   and share a bottleneck or not.  Flows that share a bottleneck link
Show full document text