draft-ietf-xrblock-rtcp-xr-delay-08.txt   draft-ietf-xrblock-rtcp-xr-delay-09.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 K. Gross Intended status: Standards Track K. Gross
Expires: March 3, 2013 AVA Networks Expires: March 22, 2013 AVA Networks
Q. Wu Q. Wu
Huawei Huawei
August 30, 2012 September 18, 2012
RTCP XR Report Block for Delay metric Reporting RTP Control Protocol (RTCP) Extended Report (XR) Block for Delay metric
draft-ietf-xrblock-rtcp-xr-delay-08.txt Reporting
draft-ietf-xrblock-rtcp-xr-delay-09.txt
Abstract Abstract
This document defines an RTCP XR Report Block that allows the This document defines an RTP Control Protocol(RTCP) Extended Report
reporting of Delay metrics for use in a range of RTP applications. (XR) Block that allows the reporting of Delay metrics for use in a
range of Real-time Transport Protocol (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.
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 March 3, 2013. This Internet-Draft will expire on March 22, 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 29 skipping to change at page 2, line 31
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-delay-08 . . . . . . . . . . . 14 A.1. draft-ietf-xrblock-rtcp-xr-delay-09 . . . . . . . . . . . 14
A.2. draft-ietf-xrblock-rtcp-xr-delay-07 . . . . . . . . . . . 14 A.2. draft-ietf-xrblock-rtcp-xr-delay-08 . . . . . . . . . . . 14
A.3. draft-ietf-xrblock-rtcp-xr-delay-06 . . . . . . . . . . . 14 A.3. draft-ietf-xrblock-rtcp-xr-delay-07 . . . . . . . . . . . 14
A.4. draft-ietf-xrblock-rtcp-xr-delay-05 . . . . . . . . . . . 14 A.4. draft-ietf-xrblock-rtcp-xr-delay-06 . . . . . . . . . . . 14
A.5. draft-ietf-xrblock-rtcp-xr-delay-04 . . . . . . . . . . . 14 A.5. draft-ietf-xrblock-rtcp-xr-delay-05 . . . . . . . . . . . 14
A.6. draft-ietf-xrblock-rtcp-xr-delay-03 . . . . . . . . . . . 14 A.6. draft-ietf-xrblock-rtcp-xr-delay-04 . . . . . . . . . . . 14
A.7. draft-ietf-xrblock-rtcp-xr-delay-02 . . . . . . . . . . . 15 A.7. draft-ietf-xrblock-rtcp-xr-delay-03 . . . . . . . . . . . 15
A.8. draft-ietf-xrblock-rtcp-xr-delay-01 . . . . . . . . . . . 15 A.8. draft-ietf-xrblock-rtcp-xr-delay-02 . . . . . . . . . . . 15
A.9. draft-ietf-xrblock-rtcp-xr-delay-00 . . . . . . . . . . . 15 A.9. draft-ietf-xrblock-rtcp-xr-delay-01 . . . . . . . . . . . 15
A.10. draft-ietf-xrblock-rtcp-xr-delay-00 . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16
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
skipping to change at page 5, line 8 skipping to change at page 5, line 8
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
Metrics in this block report on packet delay in the stream arriving Metrics in this block report on packet delay in the stream arriving
at the RTP system. Instances of this Metrics Block refer by at the RTP system. The measurement of these metrics are made either
Synchronization source (SSRC) to the separate auxiliary Measurement at the receiving end of the RTP stream or at the sending end of the
Information block [MEASI] which contains measurement intervals. This RTP stream. Instances of this Metrics Block refer by Synchronization
metric block relies on the measurement interval in the Measurement source (SSRC) to the separate auxiliary Measurement Information block
Information block indicating the span of the report and SHOULD be [MEASI] which contains measurement intervals. This metric block
sent in the same compound RTCP packet as the measurement information relies on the measurement interval in the Measurement Information
block. If the measurement interval is not received in the same block indicating the span of the report and SHOULD be sent in the
compound RTCP packet as this metric block, this metric block SHOULD same compound RTCP packet as the measurement information block. If
be discarded. the measurement interval is not received in the same compound RTCP
packet as this metric block, this metric block SHOULD be discarded
(See [MONARCH] section 5.4 for more timing details).
3.1. Report Block Structure 3.1. Report Block Structure
Delay metrics block Delay metrics block
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BT=NDEL | I | resv. | block length = 6 | | BT=NDEL | I | resv. | block length = 6 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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 (See RFC 3550 section 6.4.1). determined using RTCP SR/RR (See RFC 3550 section 6.4.1). It also
can be determined using RTCP Receiver Reference Time Report Block
and DLRR Report Block (See RFC3611 section 4.5).
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
The Min Network Round Trip Delay is the minimum value of the RTP- The Min Network Round Trip Delay is the minimum value of the RTP-
to-RTP interface round trip delay over the measurement period, to-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. It also can be determined using RTCP
Receiver Reference Time Report Block and DLRR Report Block.
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 minimum value. the minimum 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.
Max Network Round Trip Delay: 32 bits Max Network Round Trip Delay: 32 bits
The Max Network Round Trip Delay is the maximum value of the RTP- The Max Network Round Trip Delay is the maximum value of the RTP-
to-RTP interface round trip delay over the measurement period, to-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. It also can be determined using RTCP
Receiver Reference Time Report Block and DLRR Report Block.
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 maximum value. the maximum 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.
End System Delay: 64 bits End System Delay: 64 bits
skipping to change at page 8, line 15 skipping to change at page 8, line 15
4. SDP Signaling 4. SDP Signaling
[RFC3611] defines the use of SDP (Session Description Protocol) [RFC3611] defines the use of SDP (Session Description Protocol)
[RFC4566] for signaling the use of XR blocks. XR blocks MAY be used [RFC4566] for signaling the use of XR blocks. XR blocks MAY be used
without prior signaling. without prior signaling.
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
(defined in [RFC3611])
xr-format =/ xr-delay-block xr-format =/ xr-delay-block
xr-delay-block ="delay" xr-delay-block ="delay"
5. IANA Considerations 5. IANA Considerations
New block types for RTCP XR are subject to IANA registration. For New block types for RTCP XR are subject to IANA registration. For
general guidelines on IANA considerations for RTCP XR, refer to general guidelines on IANA considerations for RTCP XR, refer to
[RFC3611]. [RFC3611].
skipping to change at page 14, line 10 skipping to change at page 14, line 10
ID draft-ietf-avtcore-monarch-18, August 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-08 A.1. draft-ietf-xrblock-rtcp-xr-delay-09
The following are the major changes to previous version :
o Editorial changes based on comments that are applied to PDV draft.
A.2. draft-ietf-xrblock-rtcp-xr-delay-08
The following are the major changes to previous version : The following are the major changes to previous version :
o Move Geoff Hunt from author list to Contributors section based on o Move Geoff Hunt from author list to Contributors section based on
his suggestion. his suggestion.
A.2. draft-ietf-xrblock-rtcp-xr-delay-07 A.3. 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.
o Reference updates. o Reference updates.
A.3. draft-ietf-xrblock-rtcp-xr-delay-06 A.4. draft-ietf-xrblock-rtcp-xr-delay-06
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.4. draft-ietf-xrblock-rtcp-xr-delay-05 A.5. 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.5. draft-ietf-xrblock-rtcp-xr-delay-04 A.6. 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.6. draft-ietf-xrblock-rtcp-xr-delay-03 A.7. 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.7. draft-ietf-xrblock-rtcp-xr-delay-02 A.8. 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.8. draft-ietf-xrblock-rtcp-xr-delay-01 A.9. 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.9. draft-ietf-xrblock-rtcp-xr-delay-00 A.10. 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. 20 change blocks. 
41 lines changed or deleted 52 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/