draft-ietf-xrblock-rtcp-xr-jb-03.txt   draft-ietf-xrblock-rtcp-xr-jb-04.txt 
Audio/Video Transport Working Group A. Clark Audio/Video Transport Working Group A. Clark
Internet-Draft Telchemy Internet-Draft Telchemy
Intended status: Standards Track V. Singh Intended status: Standards Track V. Singh
Expires: June 17, 2013 Aalto University Expires: June 20, 2013 Aalto University
Q. Wu Q. Wu
Huawei Huawei
December 14, 2012 December 17, 2012
RTP Control Protocol (RTCP) Extended Report (XR) Block for Jitter Buffer RTP Control Protocol (RTCP) Extended Report (XR) Block for Jitter Buffer
Metric Reporting Metric Reporting
draft-ietf-xrblock-rtcp-xr-jb-03.txt draft-ietf-xrblock-rtcp-xr-jb-04.txt
Abstract Abstract
This document defines an RTP Control Protocol (RTCP) Extended Report This document defines an RTP Control Protocol (RTCP) Extended Report
(XR) Block that allows the reporting of Jitter Buffer metrics for a (XR) Block that allows the reporting of Jitter Buffer metrics for a
range of RTP applications. range of RTP applications.
Status of this Memo Status of this Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on June 17, 2013. This Internet-Draft will expire on June 20, 2013.
Copyright Notice Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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5.1. New RTCP XR Block Type value . . . . . . . . . . . . . . . 9 5.1. New RTCP XR Block Type value . . . . . . . . . . . . . . . 9
5.2. New RTCP XR SDP Parameter . . . . . . . . . . . . . . . . 9 5.2. New RTCP XR SDP Parameter . . . . . . . . . . . . . . . . 9
5.3. Contact information for registrations . . . . . . . . . . 9 5.3. Contact information for registrations . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . 10 6. Security Considerations . . . . . . . . . . . . . . . . . . . 10
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 11 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 11
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 12 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 12
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.1. Normative References . . . . . . . . . . . . . . . . . . . 13 9.1. Normative References . . . . . . . . . . . . . . . . . . . 13
9.2. Informative References . . . . . . . . . . . . . . . . . . 13 9.2. Informative References . . . . . . . . . . . . . . . . . . 13
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 14 Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 14
A.1. draft-ietf-xrblock-rtcp-xr-jb-03 . . . . . . . . . . . . . 14 A.1. draft-ietf-xrblock-rtcp-xr-jb-04 . . . . . . . . . . . . . 14
A.2. draft-ietf-xrblock-rtcp-xr-jb-02 . . . . . . . . . . . . . 14 A.2. draft-ietf-xrblock-rtcp-xr-jb-03 . . . . . . . . . . . . . 14
A.3. draft-ietf-xrblock-rtcp-xr-jb-01 . . . . . . . . . . . . . 14 A.3. draft-ietf-xrblock-rtcp-xr-jb-02 . . . . . . . . . . . . . 14
A.4. draft-ietf-xrblock-rtcp-xr-jb-00 . . . . . . . . . . . . . 14 A.4. draft-ietf-xrblock-rtcp-xr-jb-01 . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15 A.5. draft-ietf-xrblock-rtcp-xr-jb-00 . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16
1. Introduction 1. Introduction
1.1. Jitter Buffer Metrics Block 1.1. Jitter Buffer Metrics Block
This document defines a new block type to augment those defined in This document defines a new block type to augment those defined in
[RFC3611], for use in a range of RTP applications. [RFC3611], for use in a range of RTP applications.
The new block type provides information on jitter buffer The new block type provides information on jitter buffer
configuration and performance. configuration and performance.
The metric belongs to the class of transport-related end system The metric belongs to the class of transport-related end system
metrics defined in [RFC6792]. metrics defined in [RFC6792].
Instances of this Metrics Block refer by SSRC to the separate Instances of this Metrics Block refer by Synchronization source
auxiliary Measurement Information block [RFC6776] which contains (SSRC) to the separate auxiliary Measurement Information block
information such as the SSRC of the measured stream, and RTP sequence [RFC6776] which contains information such as the SSRC of the measured
numbers and time intervals indicating the span of the report. stream, and RTP sequence numbers and time intervals indicating the
span of the report.
1.2. RTCP and RTCP XR Reports 1.2. RTCP and RTCP XR Reports
The use of RTCP for reporting is defined in [RFC3550]. [RFC3611] The use of RTCP for reporting is defined in [RFC3550]. [RFC3611]
defined an extensible structure for reporting using an RTCP Extended defined an extensible structure for reporting using an RTCP Extended
Report (XR). This document defines a new Extended Report block for Report (XR). This document defines a new Extended Report block for
use with [RFC3550] and [RFC3611]. use with [RFC3550] and [RFC3611].
1.3. Performance Metrics Framework 1.3. Performance Metrics Framework
The Performance Metrics Framework [RFC6390] provides guidance on the The Performance Metrics Framework [RFC6390] provides guidance on the
definition and specification of performance metrics. The RTP definition and specification of performance metrics. The RTP
Monitoring Architectures [RFC6792] provides guideline for reporting Monitoring Architectures [RFC6792] provides guideline for reporting
block format using RTCP XR. Metrics described in this draft are in block format using RTCP XR. Metrics described in this draft are in
accordance with the guidelines in [RFC6390][RFC6792]. accordance with the guidelines in [RFC6390][RFC6792].
1.4. Applicability 1.4. Applicability
Real-time applications employ a jitter buffer to smooth out jitter Real-time applications employ a jitter buffer to smooth out jitter
encountered on the path from source to destination. These metrics introduced on the path from source to destination. These metrics are
are used to measure how the jitter buffer behave as a result of the used to report how the jitter buffer at the receiving end of RTP
jitter and applicable to a range of RTP applications. These metrics stream behaves as a result of jitter in the network and are
reflect terminal related factor that most affects real-time applicable to a range of RTP applications.
application quality and useful to provide more precise estimation for
user experience to the quality of real-time application performance These metrics reflect how terminal-related factors effect real-time
and also valuable to network manager in troubleshooting network. application quality and are useful to provide better end-user quality
of experience (QoE).
2. Terminology 2. Terminology
2.1. Standards Language 2.1. Standards Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119]. document are to be interpreted as described in RFC 2119 [RFC2119].
3. Jitter Buffer Metrics Block 3. Jitter Buffer Metrics Block
This block describes the configuration and operating parameters of This block describes the configuration and operating parameters of
the jitter buffer in the receiver of the RTP end system or RTP mixer the jitter buffer in the receiver of the RTP end system or RTP mixer
which sends the report. Instances of this Metrics Block refer by which sends the report. Instances of this Metrics Block refer by
SSRC to the separate auxiliary Measurement Information block SSRC to the separate auxiliary Measurement Information block
[RFC6776] which contains measurement intervals. This metric block [RFC6776] which describes the measurement interval in use. This
relies on the measurement interval in the Measurement Information Metrics Block relies on the measurement interval in the Measurement
block indicating the span of the report and should be sent in the Information block indicating the span of the report and should be
same compound RTCP packet as the measurement information block. If sent in the same compound RTCP packet as the measurement information
the measurement interval is not received in the same compound RTCP block. If the measurement interval is not received in the same
packet as this metric block, this metric block should be discarded. compound RTCP packet as this Metrics Block, this Metrics Block should
be discarded.
3.1. Report Block Structure 3.1. Report Block Structure
JB Metrics Block JB Metrics Block
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BT=NJB | I |C|Reserved | block length=3 | | BT=NJB | I |C|Reserved | block length=3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Geoff Hunt wrote the initial draft of this document. Geoff Hunt wrote the initial draft of this document.
8. Acknowledgments 8. Acknowledgments
The authors gratefully acknowledge reviews and feedback provided by The authors gratefully acknowledge reviews and feedback provided by
Bruce Adams, Philip Arden, Amit Arora, Bob Biskner, Kevin Connor, Bruce Adams, Philip Arden, Amit Arora, Bob Biskner, Kevin Connor,
Claus Dahm, Randy Ethier, Roni Even, Jim Frauenthal, Albert Higashi, Claus Dahm, Randy Ethier, Roni Even, Jim Frauenthal, Albert Higashi,
Tom Hock, Shane Holthaus, Paul Jones, Rajesh Kumar, Keith Lantz, Tom Hock, Shane Holthaus, Paul Jones, Rajesh Kumar, Keith Lantz,
Mohamed Mostafa, Amy Pendleton, Colin Perkins, Mike Ramalho, Ravi Mohamed Mostafa, Amy Pendleton, Colin Perkins, Mike Ramalho, Ravi
Raviraj, Albrecht Schwarz, Tom Taylor, Hideaki Yamada,Claire Bi,Colin Raviraj, Albrecht Schwarz, Tom Taylor, Hideaki Yamada,Claire Bi,Colin
Perkin and Dan Romascanu. Perkin, Dan Romascanu and Glen Zorn.
9. References 9. References
9.1. Normative References 9.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", March 1997. Requirement Levels", March 1997.
[RFC3550] Schulzrinne, H., "RTP: A Transport Protocol for Real-Time [RFC3550] Schulzrinne, H., "RTP: A Transport Protocol for Real-Time
Applications", RFC 3550, July 2003. Applications", RFC 3550, July 2003.
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using SDES item and XR Block", RFC 6776, August 2012. using SDES item and XR Block", RFC 6776, August 2012.
[RFC6792] Hunt, G., Wu, Q., and P. Arden, "Monitoring Architectures [RFC6792] Hunt, G., Wu, Q., and P. Arden, "Monitoring Architectures
for RTP", RFC 6792, November 2012. for RTP", RFC 6792, November 2012.
Appendix A. Change Log Appendix A. Change Log
Note to the RFC-Editor: please remove this section prior to Note to the RFC-Editor: please remove this section prior to
publication as an RFC. publication as an RFC.
A.1. draft-ietf-xrblock-rtcp-xr-jb-03 A.1. draft-ietf-xrblock-rtcp-xr-jb-04
The following are the major changes to previous version :
o Some editorial change changes based on the discussion with Glen.
A.2. draft-ietf-xrblock-rtcp-xr-jb-03
The following are the major changes to previous version : The following are the major changes to previous version :
o Reduce the "jb cfg" to 1-bit based on discussion in the WGLC. o Reduce the "jb cfg" to 1-bit based on discussion in the WGLC.
o Other editorial change changes aligning with PDV,Delay draft. o Other editorial change changes aligning with PDV,Delay draft.
A.2. draft-ietf-xrblock-rtcp-xr-jb-02 A.3. draft-ietf-xrblock-rtcp-xr-jb-02
The following are the major changes to previous version : The following are the major changes to previous version :
o Add some explaination text in the SDP offer/answer section. o Add some explanation text in the SDP offer/answer section.
o Add some text in applicability section to explain the use to o Add some text in applicability section to explain the use to
report jitter buffer metrics. report jitter buffer metrics.
o Other editorial change changes aligning with PDV,Delay draft. o Other editorial change changes aligning with PDV,Delay draft.
A.3. draft-ietf-xrblock-rtcp-xr-jb-01 A.4. draft-ietf-xrblock-rtcp-xr-jb-01
The following are the major changes to previous version : The following are the major changes to previous version :
o Outdated reference update o Outdated reference update
o Add one Editor notes to ask clarification on the use of reporting o Add one Editor notes to ask clarification on the use of reporting
jitter buffer metrics. jitter buffer metrics.
o Other Editorial changes. o Other Editorial changes.
A.4. draft-ietf-xrblock-rtcp-xr-jb-00 A.5. draft-ietf-xrblock-rtcp-xr-jb-00
The following are the major changes to previous version : The following are the major changes to previous version :
o Boilerplate updates. o Boilerplate updates.
o references updates o references updates
o allocate 32 bit field in report block for SSRC o allocate 32 bit field in report block for SSRC
o Other editorial changes to get alignment with MONARCH draft. o Other editorial changes to get alignment with MONARCH draft.
 End of changes. 14 change blocks. 
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