RTP Control Protocol (RTCP) Extended Report (XR) Blocks for Synchronization Delay and Offset Metrics Reporting
draft-ietf-xrblock-rtcp-xr-synchronization-03

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Last updated 2013-04-01
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Network Working Group                                          H. Asaeda
Internet-Draft                                                      NICT
Intended status: Standards Track                                R. Huang
Expires: October 3, 2013                                           Q. Wu
                                                                  Huawei
                                                           April 1, 2013

      RTP Control Protocol (RTCP) Extended Report (XR) Blocks for
           Synchronization Delay and Offset Metrics Reporting
             draft-ietf-xrblock-rtcp-xr-synchronization-03

Abstract

   This document defines two RTP Control Protocol (RTCP) Extended Report
   (XR) Blocks that allow the reporting of synchronization delay and
   offset metrics for use in a range of RTP applications.

Status of this Memo

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

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   This Internet-Draft will expire on October 3, 2013.

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   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Synchronization Delay and Offset Metrics Reporting
           Blocks . . . . . . . . . . . . . . . . . . . . . . . . . .  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.  RTP Flows Initial Synchronization Delay Report Block . . . . .  5
     3.1.  Metric Block Structure . . . . . . . . . . . . . . . . . .  5
     3.2.  Definition of Fields in RTP Flow Initial
           Synchronization Delay Metrics Block  . . . . . . . . . . .  6
   4.  RTP Flows Synchronization Offset Metrics Block . . . . . . . .  7
     4.1.  Metric Block Structure . . . . . . . . . . . . . . . . . .  7
     4.2.  Definition of Fields in RTP Flow General
           Synchronization Offset Metrics Block . . . . . . . . . . .  8
   5.  SDP Signaling  . . . . . . . . . . . . . . . . . . . . . . . .  9
     5.1.  SDP rtcp-xr-attrib Attribute Extension . . . . . . . . . .  9
     5.2.  Offer/Answer Usage . . . . . . . . . . . . . . . . . . . . 10
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 11
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 12
   Appendix A.  Metrics represented using RFC6390 Template  . . . . . 12
   Appendix B.  Change Log  . . . . . . . . . . . . . . . . . . . . . 13
     B.1.  draft-ietf-xrblock-rtcp-xr-syncronization-03 . . . . . . . 13
     B.2.  draft-ietf-xrblock-rtcp-xr-syncronization-02 . . . . . . . 13
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14

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1.  Introduction

1.1.  Synchronization Delay and Offset Metrics Reporting Blocks

   This draft defines two new block types to augment those defined in
   [RFC3611], for use in a range of RTP applications.

   The first new block type supports reporting of Initial
   Synchronization Delay to establish multimedia session.  Information
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