RTCP XR Report Block for One Way Delay metric Reporting
draft-wu-xrblock-rtcp-xr-one-way-delay-01

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Audio/Video Transport Working Group                       R. Brandenburg
Internet-Draft                                                       TNO
Intended status: Standards Track                                K. Gross
Expires: January 4, 2013                                    AVA Networks
                                                                   Q. Wu
                                                                  Huawei
                                                              F. Boronat
                                                             M. Montagud
                                                                   UPVLC
                                                            July 3, 2012

        RTCP XR Report Block for One Way Delay metric Reporting
             draft-wu-xrblock-rtcp-xr-one-way-delay-01.txt

Abstract

   This document defines an RTCP XR Report Block that allows the
   reporting of One Way Delay metrics for use in a range of RTP
   applications.

Status of this Memo

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

Copyright Notice

   Copyright (c) 2012 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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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect

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   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Packet One Way Delay Metrics Block . . . . . . . . . . . .  3
     1.2.  RTCP and RTCP XR Reports . . . . . . . . . . . . . . . . .  3
     1.3.  Performance Metrics Framework  . . . . . . . . . . . . . .  3
     1.4.  Applicability  . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     2.1.  Standards Language . . . . . . . . . . . . . . . . . . . .  4
   3.  One Way Delay Block  . . . . . . . . . . . . . . . . . . . . .  5
     3.1.  Report Block Structure . . . . . . . . . . . . . . . . . .  5
     3.2.  Definition of Fields in One Way Delay Metrics Report
           Block  . . . . . . . . . . . . . . . . . . . . . . . . . .  5
   4.  Clock synchronization for one way delay metrics  . . . . . . .  7
   5.  SDP Signaling  . . . . . . . . . . . . . . . . . . . . . . . .  8
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  9
     6.1.  New RTCP XR Block Type value . . . . . . . . . . . . . . .  9
     6.2.  New RTCP XR SDP Parameter  . . . . . . . . . . . . . . . .  9
     6.3.  Contact information for registrations  . . . . . . . . . .  9
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 11
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 11
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

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1.  Introduction

1.1.  Packet One Way Delay Metrics Block

   [I-D.ietf-xrblock-rtcp-xr-delay] defines the new block type
   supporting the reporting of the mean, minimum and maximum values of
   the network round-trip delay between media source(source) and media
   receiver(destination).  However none of these metrics allow a
   receiver to report one way delay from source to destination or the
   other way around.  As described in [RFC2679], the path from a source
   to a destination may be different than the path from the destination
   back to the source.  Even when the two paths are symmetric, they may
   have radically different performance characteristics.  Therefore the