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RTP Control Protocol (RTCP) Extended Report (XR) Block for Packet Delay Variation Metric Reporting
RFC 6798

Internet Engineering Task Force (IETF)                          A. Clark
Request for Comments: 6798                                      Telchemy
Category: Standards Track                                          Q. Wu
ISSN: 2070-1721                                                   Huawei
                                                           November 2012

         RTP Control Protocol (RTCP) Extended Report (XR) Block
              for Packet Delay Variation Metric Reporting

Abstract

   This document defines an RTP Control Protocol (RTCP) Extended Report
   (XR) block that allows the reporting of packet delay variation
   metrics for a range of RTP applications.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6798.

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
   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
   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.

Clark & Wu                   Standards Track                    [Page 1]
RFC 6798             RTCP XR Packet Delay Variation        November 2012

Table of Contents

   1. Introduction ....................................................3
      1.1. Packet Delay Variation Metrics Block .......................3
      1.2. RTCP and RTCP XR Reports ...................................3
      1.3. Performance Metrics Framework ..............................3
      1.4. Applicability ..............................................3
   2. Terminology .....................................................3
      2.1. Requirements Language ......................................3
      2.2. Notations ..................................................4
   3. Packet Delay Variation Metrics Block ............................4
      3.1. Report Block Structure .....................................5
      3.2. Definition of Fields in PDV Metrics Block ..................5
      3.3. Guidance on Use of PDV Metrics .............................8
      3.4. Examples of Use ............................................9
   4. SDP Signaling ...................................................9
   5. IANA Considerations ............................................10
      5.1. New RTCP XR Block Type Value ..............................10
      5.2. New RTCP XR SDP Parameter .................................10
      5.3. Contact Information for Registrations .....................11
      5.4. New Registry of PDV Types .................................11
   6. Security Considerations ........................................11
   7. Contributors ...................................................12
   8. Acknowledgments ................................................12
   9. References .....................................................12
      9.1. Normative References ......................................12
      9.2. Informative References ....................................13

Clark & Wu                   Standards Track                    [Page 2]
RFC 6798             RTCP XR Packet Delay Variation        November 2012

1.  Introduction

1.1.  Packet Delay Variation Metrics Block

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

   The new block type provides information on Packet Delay Variation
   (PDV) using one of several standard metrics, for example, Mean
   Absolute Packet Delay Variation 2 (MAPDV2) (Clause 6.2.3.2 of
   [G.1020]) or 2-point PDV (Clause 6.2.4 of [Y.1540]).

   The metrics belong to the class of transport metrics defined in
   [MONARCH].

1.2.  RTCP and RTCP XR Reports

   The use of RTCP for reporting is defined in [RFC3550].  [RFC3611]

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