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RTP Control Protocol (RTCP) Extended Report (XR) Blocks for Mean Opinion Score (MOS) Metric Reporting
RFC 7266

Document type: RFC - Proposed Standard (June 2014; No errata)
Document stream: IETF
Last updated: 2014-06-24
Other versions: plain text, pdf, html

IETF State: Submitted to IESG for Publication
Consensus: Yes
Document shepherd: Dan Romascanu
Shepherd Write-Up: Last changed 2013-10-03

IESG State: RFC 7266 (Proposed Standard)
IANA Action State: RFC-Ed-Ack
Responsible AD: Gonzalo Camarillo
Send notices to: xrblock-chairs@ietf.org, draft-ietf-xrblock-rtcp-xr-qoe@ietf.org

Internet Engineering Task Force (IETF)                          A. Clark
Request for Comments: 7266                                      Telchemy
Category: Standards Track                                          Q. Wu
ISSN: 2070-1721                                                   Huawei
                                                               R. Schott
                                                        Deutsche Telekom
                                                                 G. Zorn
                                                             Network Zen
                                                               June 2014

            RTP Control Protocol (RTCP) Extended Report (XR)
          Blocks for Mean Opinion Score (MOS) Metric Reporting

Abstract

   This document defines an RTP Control Protocol (RTCP) Extended Report
   (XR) Block including two new segment types and associated Session
   Description Protocol (SDP) parameters that allow the reporting of
   mean opinion score (MOS) Metrics for use in 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/rfc7266.

Clark, et al.                Standards Track                    [Page 1]
RFC 7266                RTCP XR MOS Report Blocks              June 2014

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
   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. MOS Metrics Report 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. MOS Metrics Block ...............................................5
      3.1. Report Block Structure .....................................6
      3.2. Definition of Fields in MOS Metrics Block ..................6
           3.2.1. Single-Channel Audio/Video per SSRC Segment .........7
           3.2.2. Multi-Channel Audio per SSRC Segment ................9
   4. SDP Signaling ..................................................10
      4.1. SDP "rtcp-xr-attrib" Attribute Extension ..................10
      4.2. Offer/Answer Usage ........................................12
   5. IANA Considerations ............................................14
      5.1. New RTCP XR Block Type Value ..............................14
      5.2. New RTCP XR SDP Parameter .................................14
      5.3. The SDP "calgextmap" Attribute ............................14
      5.4. New Registry of Calculation Algorithms ....................15
   6. Security Considerations ........................................16
   7. Contributors ...................................................16
   8. Acknowledgements ...............................................17
   9. References .....................................................17
      9.1. Normative References ......................................17
      9.2. Informative References ....................................18
   Appendix A. Metrics Represented Using the RFC 6390 Template .......20

Clark, et al.                Standards Track                    [Page 2]
RFC 7266                RTCP XR MOS Report Blocks              June 2014

1.  Introduction

1.1.  MOS Metrics Report Block

   This document defines a new block type to augment those defined in

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