draft-ietf-avt-rtcp-xr-delay-00.txt   draft-ietf-avt-rtcp-xr-delay-01.txt 
Audio/Video Transport Working G. Hunt Audio/Video Transport Working G. Hunt
Group BT Group BT
Internet-Draft A. Clark Internet-Draft A. Clark
Intended status: Standards Track Telchemy Intended status: Standards Track Telchemy
Expires: April 28, 2009 October 25, 2008 Expires: August 29, 2009 February 25, 2009
RTCP XR Report Block for Delay metric Reporting RTCP XR Report Block for Delay metric Reporting
draft-ietf-avt-rtcp-xr-delay-00.txt draft-ietf-avt-rtcp-xr-delay-01.txt
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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.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Delay Report Block . . . . . . . . . . . . . . . . . . . . 3 1.1. Delay Report Block . . . . . . . . . . . . . . . . . . . . 3
1.2. RTCP and RTCP XR Reports . . . . . . . . . . . . . . . . . 3 1.2. RTCP and RTCP XR Reports . . . . . . . . . . . . . . . . . 3
1.3. Performance Metrics Framework . . . . . . . . . . . . . . 3 1.3. Performance Metrics Framework . . . . . . . . . . . . . . 3
1.4. Applicability . . . . . . . . . . . . . . . . . . . . . . 3 1.4. Applicability . . . . . . . . . . . . . . . . . . . . . . 3
2. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Delay Block . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Delay Block . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. Report Block Structure . . . . . . . . . . . . . . . . . . 5 3.1. Report Block Structure . . . . . . . . . . . . . . . . . . 5
3.2. Definition of Fields in Delay Metrics Report Block . . . . 5 3.2. Definition of Fields in Delay Metrics Report Block . . . . 5
4. SDP Signaling . . . . . . . . . . . . . . . . . . . . . . . . 8 4. SDP Signaling . . . . . . . . . . . . . . . . . . . . . . . . 8
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
5.1. New RTCP XR Block Type value . . . . . . . . . . . . . . . 9
5.2. New RTCP XR SDP Parameter . . . . . . . . . . . . . . . . 9
5.3. Contact information for registrations . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . 10 6. Security Considerations . . . . . . . . . . . . . . . . . . . 10
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 11 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 11
8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8. Changes from previous version . . . . . . . . . . . . . . . . 12
8.1. Normative References . . . . . . . . . . . . . . . . . . . 12 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.2. Informative References . . . . . . . . . . . . . . . . . . 12 9.1. Normative References . . . . . . . . . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 13 9.2. Informative References . . . . . . . . . . . . . . . . . . 13
Intellectual Property and Copyright Statements . . . . . . . . . . 14 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction 1. Introduction
1.1. Delay Report Block 1.1. Delay Report 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
skipping to change at page 8, line 21 skipping to change at page 8, line 21
This section augments the SDP [RFC4566] attribute "rtcp-xr" defined This section augments the SDP [RFC4566] attribute "rtcp-xr" defined
in [RFC3611] by providing an additional value of "xr-format" to in [RFC3611] by providing an additional value of "xr-format" to
signal the use of the report block defined in this document. signal the use of the report block defined in this document.
rtcp-xr-attrib = "a=" "rtcp-xr" ":" [xr-format *(SP xr-format)] CRLF rtcp-xr-attrib = "a=" "rtcp-xr" ":" [xr-format *(SP xr-format)] CRLF
(defined in [RFC3611]) (defined in [RFC3611])
xr-format = xr-format / xr-delay-block xr-format = xr-format / xr-delay-block
xr-delay-block = "xr-delay" xr-delay-block = "delay"
5. IANA Considerations 5. IANA Considerations
This document creates a new block type within the IANA "RTCP XR Block New block types for RTCP XR are subject to IANA registration. For
Type Registry" called the Delay Block, and a new parameter xr-delay general guidelines on IANA considerations for RTCP XR, refer to
within the "RTCP XR SDP Parameters Registry". [RFC3611].
5.1. New RTCP XR Block Type value
This document assigns the block type value NDEL in the IANA "RTCP XR
Block Type Registry" to the "Delay Metrics Block".
[Note to RFC Editor: please replace NDEL with the IANA provided RTCP
XR block type for this block.]
5.2. New RTCP XR SDP Parameter
This document also registers a new parameter "delay" in the "RTCP XR
SDP Parameters Registry".
5.3. Contact information for registrations
The contact information for the registrations is:
Geoff Hunt (geoff.hunt@bt.com)
Orion 2 PP3, Adastral Park, Martlesham Heath, Ipswich IP5 3RE, United
Kingdom
6. Security Considerations 6. Security Considerations
It is believed that this proposed RTCP XR report block introduces no It is believed that this proposed RTCP XR report block introduces no
new security considerations beyond those described in [RFC3611]. new security considerations beyond those described in [RFC3611].
This block does not provide per-packet statistics so the risk to This block does not provide per-packet statistics so the risk to
confidentiality documented in Section 7, paragraph 3 of [RFC3611] confidentiality documented in Section 7, paragraph 3 of [RFC3611]
does not apply. does not apply.
7. Contributors 7. Contributors
The authors gratefully acknowledge the comments and contributions The authors gratefully acknowledge the comments and contributions
made by Bruce Adams, Philip Arden, Amit Arora, Bob Biskner, Kevin made by Bruce Adams, Philip Arden, Amit Arora, Bob Biskner, Kevin
Connor, Claus Dahm, Randy Ethier, Roni Even, Jim Frauenthal, Albert Connor, Claus Dahm, Randy Ethier, Roni Even, Jim Frauenthal, Albert
Higashi, Tom Hock, Shane Holthaus, Paul Jones, Rajesh Kumar, Keith Higashi, Tom Hock, Shane Holthaus, Paul Jones, Rajesh Kumar, Keith
Lantz, Mohamed Mostafa, Amy Pendleton, Colin Perkins, Mike Ramalho, Lantz, Mohamed Mostafa, Amy Pendleton, Colin Perkins, Mike Ramalho,
Ravi Raviraj, Albrecht Schwarz, Tom Taylor, and Hideaki Yamada. Ravi Raviraj, Albrecht Schwarz, Tom Taylor, and Hideaki Yamada.
8. References 8. Changes from previous version
8.1. Normative References Expanded and clarified IANA Considerations section.
Changed SDP tag for block to "delay".
9. References
9.1. Normative References
[MEASIDENT] [MEASIDENT]
Hunt, G., "RTCP XR Measurement Identifier Block", Hunt, G., "RTCP XR Measurement Identifier Block",
ID draft-ietf-avt-rtcp-xr-measid-00, August 2008. ID draft-ietf-avt-rtcp-xr-measid-01, February 2009.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", RFC 2119, BCP 14, March 1997. Requirement Levels", RFC 2119, BCP 14, 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.
[RFC3611] Friedman, T., "RTP Control Protocol Extended Reports (RTCP [RFC3611] Friedman, T., "RTP Control Protocol Extended Reports (RTCP
XR)", RFC 3611, November 2003. XR)", RFC 3611, November 2003.
[RFC4566] Handley, M., "SDP: Session Description Protocol", [RFC4566] Handley, M., "SDP: Session Description Protocol",
RFC 4566, July 2006. RFC 4566, July 2006.
8.2. Informative References 9.2. Informative References
[MONARCH] Hunt, G., "Monitoring Architectures for RTP", [MONARCH] Hunt, G., "Monitoring Architectures for RTP",
ID draft-hunt-avt-monarch-01, August 2008. ID draft-hunt-avt-monarch-01, August 2008.
[PMOLFRAME] [PMOLFRAME]
Clark, A., "Framework for Performance Metric Development", Clark, A., "Framework for Performance Metric Development",
ID draft-ietf-pmol-metrics-framework-00, July 2008. ID draft-ietf-pmol-metrics-framework-00, July 2008.
Authors' Addresses Authors' Addresses
Geoff Hunt Geoff Hunt
BT BT
Orion 1 PP9 Orion 2 PP3
Adastral Park Adastral Park
Martlesham Heath Martlesham Heath
Ipswich, Suffolk IP4 2TH Ipswich, Suffolk IP5 3RE
United Kingdom United Kingdom
Phone: +44 1473 608325 Phone: +44 1473 651704
Email: geoff.hunt@bt.com Email: geoff.hunt@bt.com
Alan Clark Alan Clark
Telchemy Incorporated Telchemy Incorporated
2905 Premiere Parkway, Suite 280 2905 Premiere Parkway, Suite 280
Duluth, GA 30097 Duluth, GA 30097
USA USA
Email: alan.d.clark@telchemy.com Email: alan.d.clark@telchemy.com
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