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Session Initiation Protocol Event Package for Voice Quality Reporting
RFC 6035

Internet Engineering Task Force (IETF)                      A. Pendleton
Request for Comments: 6035                                      A. Clark
Category: Standards Track                          Telchemy Incorporated
ISSN: 2070-1721                                              A. Johnston
                                                                   Avaya
                                                            H. Sinnreich
                                                            Unaffiliated
                                                           November 2010

 Session Initiation Protocol Event Package for Voice Quality Reporting

Abstract

   This document defines a Session Initiation Protocol (SIP) event
   package that enables the collection and reporting of metrics that
   measure the quality for Voice over Internet Protocol (VoIP) sessions.
   Voice call quality information derived from RTP Control Protocol
   Extended Reports (RTCP-XR) and call information from SIP is conveyed
   from a User Agent (UA) in a session, known as a reporter, to a third
   party, known as a collector.  A registration for the application/ vq-
   rtcpxr media type is also included.

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/rfc6035.

Pendleton, et al.            Standards Track                    [Page 1]
RFC 6035         SIP Package for Voice Quality Reporting   November 2010

Copyright Notice

   Copyright (c) 2010 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.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Pendleton, et al.            Standards Track                    [Page 2]
RFC 6035         SIP Package for Voice Quality Reporting   November 2010

Table of Contents

   1. Introduction ....................................................4
      1.1. Applicability Statement ....................................4
      1.2. Use of the Mechanism .......................................4
   2. Terminology .....................................................6
   3. SIP Events for VoIP Quality Reporting ...........................6
      3.1. SUBSCRIBE NOTIFY Method ....................................6
      3.2. PUBLISH Method .............................................7
      3.3. Multi-Party and Multi-Segment Calls ........................7
      3.4. Overload Avoidance .........................................7
   4. Event Package Formal Definition .................................8
      4.1. Event Package Name .........................................8
      4.2. Event Package Parameters ...................................8
      4.3. SUBSCRIBE Bodies ...........................................8
      4.4. Subscribe Duration .........................................8
      4.5. NOTIFY Bodies ..............................................8
      4.6. Voice Quality Event and Semantics .........................10
           4.6.1. ABNF Syntax Definition .............................10
           4.6.2. Parameter Definitions and Mappings .................21

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