RTCP XR Report Block for Discard metric Reporting
draft-ietf-xrblock-rtcp-xr-discard-01

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Document Type Active Internet-Draft (xrblock WG)
Last updated 2011-12-09 (latest revision 2011-10-17)
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Audio/Video Transport Working Group                              G. Hunt
Internet-Draft                                              Unaffiliated
Intended status: Standards Track                                A. Clark
Expires: June 11, 2012                                          Telchemy
                                                                 G. Zorn
                                                             Network Zen
                                                                   Q. Wu
                                                                  Huawei
                                                        December 9, 2011

           RTCP XR Report Block for Discard metric Reporting
               draft-ietf-xrblock-rtcp-xr-discard-01.txt

Abstract

   This document defines an RTCP XR Report Block that allows the
   reporting of a simple discard count metric 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.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on June 11, 2012.

Copyright Notice

   Copyright (c) 2011 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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   (http://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must

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   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.  Discard 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.  Discard Metric Report Block  . . . . . . . . . . . . . . . . .  5
     3.1.  Report Block Structure . . . . . . . . . . . . . . . . . .  5
     3.2.  Definition of Fields in Discard Metric Report Block  . . .  5
   4.  SDP Signaling  . . . . . . . . . . . . . . . . . . . . . . . .  7
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  8
     5.1.  New RTCP XR Block Type value . . . . . . . . . . . . . . .  8
     5.2.  New RTCP XR SDP Parameter  . . . . . . . . . . . . . . . .  8
     5.3.  Contact information for registrations  . . . . . . . . . .  8
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   7.  Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 10
   8.  Changes from previous version  . . . . . . . . . . . . . . . . 11
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 12
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 12
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 13

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1.  Introduction

1.1.  Discard Report Block

   This draft defines a new block type to augment those defined in
   [RFC3611] for use in a range of RTP applications.  The new block type
   supports the reporting of the number of packets which are received
   correctly but are never played out, typically because they arrive too
   late to be played out (buffer underflow) or too early (buffer
   overflow).  The metric is applicable both to systems which use packet
   loss repair techniques (such as forward error correction [RFC5109] or
   retransmission [RFC4588]) and to those which do not.

   This metric is useful for identifying the existence, and
   characterising the severity, of a packet transport problem which may
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