Post-Repair Loss RLE Report Block Type for RTP Control Protocol (RTCP) Extended Reports (XRs)
RFC 5725
Internet Engineering Task Force (IETF) A. Begen
Request for Comments: 5725 D. Hsu
Category: Standards Track M. Lague
ISSN: 2070-1721 Cisco
February 2010
Post-Repair Loss RLE Report Block Type for
RTP Control Protocol (RTCP) Extended Reports (XRs)
Abstract
This document defines a new report block type within the framework of
RTP Control Protocol (RTCP) Extended Reports (XRs). One of the
initial XR report block types is the Loss Run Length Encoding (RLE)
Report Block. This report conveys information regarding the
individual Real-time Transport Protocol (RTP) packet receipt and loss
events experienced during the RTCP interval preceding the
transmission of the report. The new report, which is referred to as
the Post-repair Loss RLE report, carries information regarding the
packets that remain lost after all loss-repair methods are applied.
By comparing the RTP packet receipts/losses before and after the loss
repair is completed, one can determine the effectiveness of the loss-
repair methods in an aggregated fashion. This document also defines
the signaling of the Post-repair Loss RLE report in the Session
Description Protocol (SDP).
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/rfc5725.
Begen, et al. Standards Track [Page 1]
RFC 5725 Post-Repair Loss RLE Report Block Type February 2010
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Requirements Notation . . . . . . . . . . . . . . . . . . . . . 4
3. Post-Repair Loss RLE Report Block . . . . . . . . . . . . . . . 4
4. Session Description Protocol Signaling . . . . . . . . . . . . 6
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 6
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 8
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1. Normative References . . . . . . . . . . . . . . . . . . . 8
8.2. Informative References . . . . . . . . . . . . . . . . . . 8
Begen, et al. Standards Track [Page 2]
RFC 5725 Post-Repair Loss RLE Report Block Type February 2010
1. Introduction
The RTP Control Protocol (RTCP) is the out-of-band control protocol
for applications that are using the Real-time Transport Protocol
(RTP) for media delivery and communications [RFC3550]. RTCP allows
RTP entities to monitor data delivery and provides them minimal
control functionality via sender and receiver reports as well as
other control packets. [RFC3611] expands the RTCP functionality
further by introducing the RTCP Extended Reports (XRs).
One of the initial XR report block types defined in [RFC3611] is the
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