draft-ietf-xrblock-rtcp-xr-delay-06.txt   draft-ietf-xrblock-rtcp-xr-delay-07.txt 
Audio/Video Transport Working Group G. Hunt Audio/Video Transport Working Group G. Hunt
Internet-Draft Unaffiliated Internet-Draft Unaffiliated
Intended status: Standards Track A. Clark Intended status: Standards Track A. Clark
Expires: November 30, 2012 Telchemy Expires: March 1, 2013 Telchemy
K. Gross K. Gross
AVA Networks AVA Networks
Q. Wu Q. Wu
Huawei Huawei
May 29, 2012 August 28, 2012
RTCP XR Report Block for Delay metric Reporting RTCP XR Report Block for Delay metric Reporting
draft-ietf-xrblock-rtcp-xr-delay-06.txt draft-ietf-xrblock-rtcp-xr-delay-07.txt
Abstract Abstract
This document defines an RTCP XR Report Block that allows the This document defines an RTCP XR Report Block that allows the
reporting of Delay metrics for use in a range of RTP applications. reporting of Delay metrics for use in a 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
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
skipping to change at page 1, line 36 skipping to change at page 1, line 36
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 November 30, 2012. This Internet-Draft will expire on March 1, 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
skipping to change at page 2, line 30 skipping to change at page 2, line 30
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
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. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 11 7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 11
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.1. Normative References . . . . . . . . . . . . . . . . . . . 12 8.1. Normative References . . . . . . . . . . . . . . . . . . . 12
8.2. Informative References . . . . . . . . . . . . . . . . . . 12 8.2. Informative References . . . . . . . . . . . . . . . . . . 12
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 13 Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 13
A.1. draft-ietf-xrblock-rtcp-xr-delay-06 . . . . . . . . . . . 13 A.1. draft-ietf-xrblock-rtcp-xr-delay-07 . . . . . . . . . . . 13
A.2. draft-ietf-xrblock-rtcp-xr-delay-05 . . . . . . . . . . . 13 A.2. draft-ietf-xrblock-rtcp-xr-delay-06 . . . . . . . . . . . 13
A.3. draft-ietf-xrblock-rtcp-xr-delay-04 . . . . . . . . . . . 13 A.3. draft-ietf-xrblock-rtcp-xr-delay-05 . . . . . . . . . . . 13
A.4. draft-ietf-xrblock-rtcp-xr-delay-03 . . . . . . . . . . . 13 A.4. draft-ietf-xrblock-rtcp-xr-delay-04 . . . . . . . . . . . 13
A.5. draft-ietf-xrblock-rtcp-xr-delay-02 . . . . . . . . . . . 13 A.5. draft-ietf-xrblock-rtcp-xr-delay-03 . . . . . . . . . . . 13
A.6. draft-ietf-xrblock-rtcp-xr-delay-01 . . . . . . . . . . . 13 A.6. draft-ietf-xrblock-rtcp-xr-delay-02 . . . . . . . . . . . 14
A.7. draft-ietf-xrblock-rtcp-xr-delay-00 . . . . . . . . . . . 14 A.7. draft-ietf-xrblock-rtcp-xr-delay-01 . . . . . . . . . . . 14
A.8. draft-ietf-xrblock-rtcp-xr-delay-00 . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction 1. Introduction
1.1. Packet Delay Metrics Block 1.1. Packet Delay Metrics Block
This draft defines a new block type to augment those defined in 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 [RFC3611] for use in a range of RTP applications. The new block type
supports the reporting of the mean, minimum and maximum values of the supports the reporting of the mean, minimum and maximum values of the
network round-trip delay between RTP interfaces in peer RTP end network round-trip delay between RTP interfaces in peer RTP end
systems as measured, for example, using the RTCP method described in systems as measured, for example, using the RTCP method described in
[RFC3550]. It also supports reporting of the component of the round- [RFC3550]. It also supports reporting of the component of the round-
trip delay internal to the local RTP system. trip delay internal to the local RTP system.
The network metrics belong to the class of packet transport delay The network metrics belong to the class of packet transport delay
metrics defined in [MONARCH] (work in progress). metrics defined in [MONARCH].
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 draft defines a new Extended Report block that Report (XR). This draft defines a new Extended Report block that
MUST be used as defined in [RFC3550] and [RFC3611]. MUST be used as defined in [RFC3550] and [RFC3611].
1.3. Performance Metrics Framework 1.3. Performance Metrics Framework
skipping to change at page 3, line 40 skipping to change at page 3, line 40
definition and specification of performance metrics. The RTP definition and specification of performance metrics. The RTP
Monitoring Architectures [MONARCH] provides guideline for reporting Monitoring Architectures [MONARCH] provides guideline for reporting
block format using RTCP XR. The Metrics Block described in this block format using RTCP XR. The Metrics Block described in this
document are in accordance with the guidelines in [RFC6390] and document are in accordance with the guidelines in [RFC6390] and
[MONARCH]. [MONARCH].
1.4. Applicability 1.4. Applicability
These metrics are applicable to a range of RTP applications in which These metrics are applicable to a range of RTP applications in which
this report block would be useful, such as multimedia conferencing this report block would be useful, such as multimedia conferencing
and streaming audio and video. and streaming audio and video. Knowledge of the round-trip delay and
delay characteristics can aid other receivers in sizing their receive
buffers and selecting a playout delay. The same information is also
valuable to network managers in troubleshooting network and user
experience issues.
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. Delay Block 3. Delay Block
skipping to change at page 6, line 34 skipping to change at page 6, line 34
SSRC of source: 32 bits SSRC of source: 32 bits
As defined in Section 4.1 of [RFC3611]. As defined in Section 4.1 of [RFC3611].
Mean Network Round Trip Delay: 32 bits Mean Network Round Trip Delay: 32 bits
The Mean Network Round Trip Delay is the mean value of the RTP-to- The Mean Network Round Trip Delay is the mean value of the RTP-to-
RTP interface round trip delay over the measurement period, RTP interface round trip delay over the measurement period,
expressed in units of 1/65536 seconds. This value is typically expressed in units of 1/65536 seconds. This value is typically
determined using RTCP SR/RR. determined using RTCP SR/RR (See RFC 3550 section 6.4.1).
If only one measurement of Round Trip Delay is available for the If only one measurement of Round Trip Delay is available for the
timespan of the report (i.e.,the measurement period) (whether timespan of the report (i.e.,the measurement period) (whether
Interval or Cumulative), this single value SHOULD be reported as Interval or Cumulative), this single value SHOULD be reported as
the mean value. the mean value.
If the measurement is unavailable, the value of this field with If the measurement is unavailable, the value of this field with
all bits set to 1 MUST be reported. all bits set to 1 MUST be reported.
Min Network Round Trip Delay: 32 bits Min Network Round Trip Delay: 32 bits
skipping to change at page 12, line 29 skipping to change at page 12, line 29
Description Protocol", July 2006. Description Protocol", July 2006.
[RFC5905] Mills, D., Martin, J., Burbank, J., and W. Kasch, "Network [RFC5905] Mills, D., Martin, J., Burbank, J., and W. Kasch, "Network
Time Protocol Version 4: Protocol and Algorithms Time Protocol Version 4: Protocol and Algorithms
Specification", RFC 5905, June 2010. Specification", RFC 5905, June 2010.
8.2. Informative References 8.2. Informative References
[MEASI] Hunt, G., "Measurement Identity and information Reporting [MEASI] Hunt, G., "Measurement Identity and information Reporting
using SDES item and XR Block", using SDES item and XR Block",
ID draft-ietf-xrblock-rtcp-xr-meas-identity-06, ID draft-ietf-xrblock-rtcp-xr-meas-identity-09, July 2012.
April 2012.
[MONARCH] Hunt, G., "Monitoring Architectures for RTP", [MONARCH] Hunt, G., "Monitoring Architectures for RTP",
ID draft-ietf-avtcore-monarch-13, May 2012. ID draft-ietf-avtcore-monarch-18, August 2012.
[RFC6390] Clark, A. and B. Claise, "Framework for Performance Metric [RFC6390] Clark, A. and B. Claise, "Framework for Performance Metric
Development", RFC 6390, October 2011. Development", RFC 6390, October 2011.
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-delay-06 A.1. draft-ietf-xrblock-rtcp-xr-delay-07
The following are the major changes to previous version : The following are the major changes to previous version :
o Editorial changes. o Editorial changes.
A.2. draft-ietf-xrblock-rtcp-xr-delay-05 o Reference updates.
A.2. draft-ietf-xrblock-rtcp-xr-delay-06
The following are the major changes to previous version :
o Editorial changes.
A.3. draft-ietf-xrblock-rtcp-xr-delay-05
The following are the major changes to previous version : The following are the major changes to previous version :
o One typo fixed. o One typo fixed.
A.3. draft-ietf-xrblock-rtcp-xr-delay-04 A.4. draft-ietf-xrblock-rtcp-xr-delay-04
The following are the major changes to previous version : The following are the major changes to previous version :
o Revise the definition of sampled metric to get alignment with o Revise the definition of sampled metric to get alignment with
MONARCH. MONARCH.
o Clarify sending the metric block in the same RTCP compound packet o Clarify sending the metric block in the same RTCP compound packet
as the measurement information block. as the measurement information block.
A.4. draft-ietf-xrblock-rtcp-xr-delay-03 A.5. draft-ietf-xrblock-rtcp-xr-delay-03
The following are the major changes to previous version : The following are the major changes to previous version :
o Allocate 64 bit for end system delay and represent it using 64 bit o Allocate 64 bit for end system delay and represent it using 64 bit
NTP-Timestamp. NTP-Timestamp.
o Other editorial changes. o Other editorial changes.
A.5. draft-ietf-xrblock-rtcp-xr-delay-02 A.6. draft-ietf-xrblock-rtcp-xr-delay-02
The following are the major changes to previous version : The following are the major changes to previous version :
o Allocate 32bits for each metrics and change unit for each metric o Allocate 32bits for each metrics and change unit for each metric
from ms to 1/65536 seconds. from ms to 1/65536 seconds.
A.6. draft-ietf-xrblock-rtcp-xr-delay-01 A.7. draft-ietf-xrblock-rtcp-xr-delay-01
The following are the major changes to previous version : The following are the major changes to previous version :
o Updated references. o Updated references.
o Allocate one more bit for Interval metric flag to indicate sampled o Allocate one more bit for Interval metric flag to indicate sampled
metric can be used. metric can be used.
o add a few clarification text for failure mode. o add a few clarification text for failure mode.
A.7. draft-ietf-xrblock-rtcp-xr-delay-00 A.8. draft-ietf-xrblock-rtcp-xr-delay-00
The following are the major changes to previous version : The following are the major changes to previous version :
o Changed BNF for SDP following Christian Groves' and Tom Taylor's o Changed BNF for SDP following Christian Groves' and Tom Taylor's
comments (4th and 5th May 2009). comments (4th and 5th May 2009).
o Updated references. o Updated references.
Authors' Addresses Authors' Addresses
 End of changes. 17 change blocks. 
24 lines changed or deleted 36 lines changed or added

This html diff was produced by rfcdiff 1.41. The latest version is available from http://tools.ietf.org/tools/rfcdiff/