draft-ietf-avt-rtcp-xr-meas-identity-01.txt   draft-ietf-avt-rtcp-xr-meas-identity-02.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: August 29, 2009 February 25, 2009 Expires: November 16, 2009 May 15, 2009
RTCP XR Report Block for Measurement Identity RTCP XR Report Block for Measurement Identity
draft-ietf-avt-rtcp-xr-meas-identity-01.txt draft-ietf-avt-rtcp-xr-meas-identity-02.txt
Status of this Memo Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
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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."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on August 29, 2009. This Internet-Draft will expire on November 16, 2009.
Copyright Notice Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the Copyright (c) 2009 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 in effect on the date of Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info). publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights Please review these documents carefully, as they describe your rights
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Kingdom Kingdom
5. Security Considerations 5. Security Considerations
RTCP reports can contain sensitive information since they can provide RTCP reports can contain sensitive information since they can provide
information about the nature and duration of a session established information about the nature and duration of a session established
between two or more endpoints. between two or more endpoints.
6. Changes since last version 6. Changes since last version
Expanded and clarified IANA Considerations section Updated references.
Changed to remove explicit SDP signalling for this block - need for
block is implicit if a metrics block is requested which depends on
this block.
Modified block structure to send first sequence number without
extension, rather than extend to 32-bit number with leading 16 bits
set to 0. These 16 bits are now reserved. Addresses Colin Perkins'
comment of 15-Nov-2008
Removed "forwarding count" field following Colin Perkins' request for
a use case. The field had been intended for use by translators to
establish the "distance" (as a count of forwarding systems) to the
point at which a measurement was made. However a recommendation to
increment the count could have forced forwarding translator devices
to parse the packet on a slow (CPU) path, possibly compromising RTCP
measurement of round-trip delay [RFC3550].
7. References 7. References
7.1. Normative References 7.1. 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", 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.
7.2. Informative References 7.2. Informative References
[DISCARD] Hunt, G., "RTCP XR Report Block for Discard metric [DISCARD] Hunt, G., "RTCP XR Report Block for Discard metric
Reporting", ID draft-ietf-avt-rtcp-xr-discard-01, Reporting", ID draft-ietf-avt-rtcp-xr-discard-02,
February 2009. May 2009.
[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.
[MPEG2] ISO/IEC, "Standard 13818-1", December 2000. [MPEG2] ISO/IEC, "Standard 13818-1", December 2000.
[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-02, March 2009.
Authors' Addresses Authors' Addresses
Geoff Hunt Geoff Hunt
BT BT
Orion 2 PP3 Orion 2 PP3
Adastral Park Adastral Park
Martlesham Heath Martlesham Heath
Ipswich, Suffolk IP5 3RE Ipswich, Suffolk IP5 3RE
United Kingdom United Kingdom
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