draft-ietf-xrblock-rtcp-xr-meas-identity-07.txt   draft-ietf-xrblock-rtcp-xr-meas-identity-08.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: December 21, 2012 Telchemy Expires: January 10, 2013 Telchemy
Q. Wu Q. Wu
Huawei Huawei
June 19, 2012 July 9, 2012
Measurement Identity and information Reporting using SDES item and XR Measurement Identity and information Reporting using SDES item and XR
Block Block
draft-ietf-xrblock-rtcp-xr-meas-identity-07.txt draft-ietf-xrblock-rtcp-xr-meas-identity-08.txt
Abstract Abstract
This document defines an RTP Control Protocol (RTCP) Source This document defines an RTP Control Protocol (RTCP) Source
Description (SDES) item and an RTCP Extended Report (XR) Block Description (SDES) item and an RTCP Extended Report (XR) Block
carrying parameters that identify and describe a measurement period, carrying parameters that identify and describe a measurement period,
to which one or more other RTCP XR Report Blocks may refer. to which one or more other RTCP XR Report Blocks may refer.
Status of this Memo Status of this Memo
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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-
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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 December 21, 2012. This Internet-Draft will expire on January 10, 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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Block . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Block . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
5.1. New RTCP SDES Type value . . . . . . . . . . . . . . . . . 10 5.1. New RTCP SDES Type value . . . . . . . . . . . . . . . . . 10
5.2. New RTCP XR Block Type value . . . . . . . . . . . . . . . 10 5.2. New RTCP XR Block Type value . . . . . . . . . . . . . . . 10
5.3. Contact information for registrations . . . . . . . . . . 10 5.3. Contact information for registrations . . . . . . . . . . 10
6. Security Considerations . . . . . . . . . . . . . . . . . . . 11 6. Security Considerations . . . . . . . . . . . . . . . . . . . 11
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.1. Normative References . . . . . . . . . . . . . . . . . . . 12 7.1. Normative References . . . . . . . . . . . . . . . . . . . 12
7.2. Informative References . . . . . . . . . . . . . . . . . . 12 7.2. Informative References . . . . . . . . . . . . . . . . . . 12
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 13 Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 13
A.1. draft-ietf-xrblock-xr-rtcp-meas-identity-07 . . . . . . . 13 A.1. draft-ietf-xrblock-xr-rtcp-meas-identity-08 . . . . . . . 13
A.2. draft-ietf-xrblock-xr-rtcp-meas-identity-06 . . . . . . . 13 A.2. draft-ietf-xrblock-xr-rtcp-meas-identity-07 . . . . . . . 13
A.3. draft-ietf-xrblock-xr-rtcp-meas-identity-05 . . . . . . . 13 A.3. draft-ietf-xrblock-xr-rtcp-meas-identity-06 . . . . . . . 13
A.4. draft-ietf-xrblock-xr-rtcp-meas-identity-04 . . . . . . . 13 A.4. draft-ietf-xrblock-xr-rtcp-meas-identity-05 . . . . . . . 13
A.5. draft-ietf-xrblock-xr-rtcp-meas-identity-03 . . . . . . . 13 A.5. draft-ietf-xrblock-xr-rtcp-meas-identity-04 . . . . . . . 13
A.6. draft-ietf-xrblock-xr-rtcp-meas-identity-02 . . . . . . . 13 A.6. draft-ietf-xrblock-xr-rtcp-meas-identity-03 . . . . . . . 14
A.7. draft-ietf-xrblock-xr-rtcp-meas-identity-01 . . . . . . . 14 A.7. draft-ietf-xrblock-xr-rtcp-meas-identity-02 . . . . . . . 14
A.8. draft-ietf-xrblock-xr-rtcp-meas-identity-00 . . . . . . . 14 A.8. draft-ietf-xrblock-xr-rtcp-meas-identity-01 . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 15 A.9. draft-ietf-xrblock-xr-rtcp-meas-identity-00 . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16
1. Introduction 1. Introduction
This document defines one new RTP Control Protocol (RTCP) Source This document defines one new RTP Control Protocol (RTCP) Source
Description (SDES) [RFC3550] item, and one new Extended Report (XR) Description (SDES) [RFC3550] item, and one new Extended Report (XR)
Report Block carrying parameters that identify and describe a Report Block carrying parameters that identify and describe a
measurement period, to which one or more other RTCP XR Report Blocks measurement period, to which one or more other RTCP XR Report Blocks
may refer. may refer.
The SDES item provides a field for an application specific auxiliary The SDES item provides a field for an application specific auxiliary
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packet, in which each set share the same information relevant to a packet, in which each set share the same information relevant to a
reported measurement. There may also be RTCP XR blocks in the packet reported measurement. There may also be RTCP XR blocks in the packet
which are not associated with a Measurement Information block, for which are not associated with a Measurement Information block, for
example blocks which were defined before the Measurement Identity and example blocks which were defined before the Measurement Identity and
information mechanism was introduced by this document. information mechanism was introduced by this document.
1.1. RTCP and RTCP XR Reports 1.1. 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]
defines an extensible structure for reporting using an RTCP Extended defines an extensible structure for reporting using an RTCP Extended
Report (XR). This document defines a new Extended Report block that Report (XR). This document defines a new Extended Report block. The
must be used as defined in [RFC3550] and [RFC3611]. use of Extended Report blocks is defined by [RFC3611].
1.2. Performance Metrics Framework 1.2. 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[MONARCH] provides guideline for reporting Monitoring Architectures[MONARCH] provides guideline for reporting
block format using RTCP XR. The SDES item and XR Block described in block format using RTCP XR. The SDES item and XR Block described in
this document are in accordance with [RFC6390] and [MONARCH]. this document are in accordance with [RFC6390] and [MONARCH].
1.3. Applicability 1.3. Applicability
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| .... | ....
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
Application specific identifier is an additional identifier which is Application specific identifier is an additional identifier which is
useful in the context of a specific application, e.g. an MPEG-2 useful in the context of a specific application, e.g. an MPEG-2
transport identifier [MPEG2]. This item MUST be ignored by transport identifier [MPEG2]. This item MUST be ignored by
applications that are not configured to make use of it. The applications that are not configured to make use of it. The
identifier is variable length. Its length is described by the length identifier is variable length. Its length is described by the length
field. The value of the length field does not include the two octet field. The value of the length field does not include the two octet
SDES item header. If no identifier is provided, the length field SDES item header.
MUST be set to zero.
4. Measurement Information XR Block 4. Measurement Information XR Block
4.1. Report Block Structure 4.1. Report Block Structure
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=NMI | Reserved | block length = 6 | | BT=NMI | Reserved | block length = 7 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC of stream source | | SSRC of stream source |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | first sequence number | | Reserved | first sequence number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| extended first sequence number of interval | | extended first sequence number of interval |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| extended last sequence number | | extended last sequence number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Cumulative) | | Measurement Duration (Interval) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Interval) | | Measurement Duration (Cumulative) - Seconds (bit 0-31) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Measurement Duration (Cumulative) - Fraction (bit 0-31) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Report Block Structure Report Block Structure
4.2. Definition of Fields in Measurement Information Report Block 4.2. Definition of Fields in Measurement Information Report Block
Block type (BT): 8 bits Block type (BT): 8 bits
A Measurement Information Report Block is identified by the A Measurement Information Report Block is identified by the
constant NMI. constant NMI.
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RTCP XR block type for this block.] RTCP XR block type for this block.]
Reserved.: 8 bits Reserved.: 8 bits
These bits are reserved. They MUST be set to zero by senders and These bits are reserved. They MUST be set to zero by senders and
ignored by receivers. ignored by receivers.
Block Length: 16 bits Block Length: 16 bits
The length of this report block in 32-bit words minus one. For The length of this report block in 32-bit words minus one. For
the Measurement Information block, the block length is equal to 6. the Measurement Information block, the block length is equal to 7.
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].
Reserved: 16 bits Reserved: 16 bits
These bits are reserved. They MUST be set to zero by senders and These bits are reserved. They MUST be set to zero by senders and
ignored by receivers. ignored by receivers.
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The extended RTP sequence number of the last received RTP packet The extended RTP sequence number of the last received RTP packet
which contributed to this measurement. The extended sequence which contributed to this measurement. The extended sequence
number is expressed as the low 16 bits value containing the number is expressed as the low 16 bits value containing the
sequence number received in an RTP data packet and the most sequence number received in an RTP data packet and the most
significant 16 bits value containing the corresponding count of significant 16 bits value containing the corresponding count of
sequence number cycles. For additional information on extended sequence number cycles. For additional information on extended
sequence numbers see "extended highest sequence number received" sequence numbers see "extended highest sequence number received"
definition in RFC 3550 section 6.4.1 and RFC 3550 Appendix A.1. definition in RFC 3550 section 6.4.1 and RFC 3550 Appendix A.1.
Measurement Duration (Cumulative) : 32 bits Measurement Duration (Interval): 32 bits
The duration, expressed in units of 1/65536 seconds, of the
reporting interval applicable to Cumulative reports which use this
Measurement Information block. The value of this field can be
calculated by the receiver of the RTP media stream, for example,
based on received RTP media packets or using RTCP method described
in [RFC3550].
Measurement Duration (Interval) : 32 bits
The duration, expressed in units of 1/65536 seconds, of the The duration, expressed in units of 1/65536 seconds, of the
reporting interval applicable to Interval reports which use this reporting interval applicable to Interval reports which use this
Measurement Information block . The value of this field can be Measurement Information block . The value of this field can be
calculated by the receiver of the RTP media stream, for example, calculated by the receiver of the RTP media stream, for example,
based on received RTP media packets or using RTCP method described based on received RTP media packets or using RTCP method described
in [RFC3550]. in [RFC3550].
Measurement Duration (Cumulative): 64 bits
The duration of the reporting interval applicable to Cumulative
reports which use this Measurement Information block. The value
of this field is represented using a 64-bit NTP-format timestamp
as defined in [RFC5905], which is 64-bit unsigned fixed-point
number with the integer part in the first 32 bits and the
fractional part in the last 32 bits. It can be calculated by the
receiver of the RTP media stream, for example, based on received
RTP media packets or using RTCP method described in [RFC3550].
5. IANA Considerations 5. IANA Considerations
New SDES types for RTCP SDES are subject to IANA registration. For New SDES types for RTCP SDES are subject to IANA registration. For
general guidelines on IANA considerations for RTCP SDES, refer to general guidelines on IANA considerations for RTCP SDES, refer to
[RFC3550]. [RFC3550].
5.1. New RTCP SDES Type value 5.1. New RTCP SDES Type value
This document assigns one additional SDES type in the IANA "RTCP XR This document assigns one additional SDES type in the IANA "RTCP XR
Block Type Registry" to the Measurement Identity SDES items as Block Type Registry" to the Measurement Identity SDES items as
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[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.
[RFC3611] Friedman, T., Caceres, R., and A. Clark, "RTP Control [RFC3611] Friedman, T., Caceres, R., and A. Clark, "RTP Control
Protocol Extended Reports (RTCP XR)", November 2003. Protocol Extended Reports (RTCP XR)", November 2003.
[RFC5905] Mills, D., Matin, J., Ed., Burbank, J., and W. Kasch,
"Network Time Protocol Version 4: Protocol and Algorithms
Specification", RFC 5905, June 2010.
7.2. Informative References 7.2. Informative References
[MONARCH] Wu, Q., Hunt, G., and P. , "Monitoring Architectures for [MONARCH] Wu, Q., Hunt, G., and P. , "Monitoring Architectures for
RTP", ID draft-ietf-avtcore-monarch-12, April 2012. RTP", ID draft-ietf-avtcore-monarch-17, June 2012.
[MPEG2] "ISO/IEC, "Standard 13818-1"", December 2000. [MPEG2] "ISO/IEC, "Standard 13818-1"", December 2000.
[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-xr-rtcp-meas-identity-07 A.1. draft-ietf-xrblock-xr-rtcp-meas-identity-08
The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-06:
o Expand 32-bit measurement interval (cumulative) into 64 bits and
use NTP timestamp format.
o Delete the last sentence in the sub-section 3.1.
o Block length change for consistency.
o Other editorial changes.
A.2. draft-ietf-xrblock-xr-rtcp-meas-identity-07
The following are the major changes to The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-06: draft-ietf-xrblock-xr-rtcp-meas-identity-06:
o One more Editorial change. o One more Editorial change.
A.2. draft-ietf-xrblock-xr-rtcp-meas-identity-06 A.3. draft-ietf-xrblock-xr-rtcp-meas-identity-06
The following are the major changes to The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-05: draft-ietf-xrblock-xr-rtcp-meas-identity-05:
o Editorial changes. o Editorial changes.
A.3. draft-ietf-xrblock-xr-rtcp-meas-identity-05 A.4. draft-ietf-xrblock-xr-rtcp-meas-identity-05
The following are the major changes to The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-04: draft-ietf-xrblock-xr-rtcp-meas-identity-04:
o Clarify the definition of extended sequence number. o Clarify the definition of extended sequence number.
A.4. draft-ietf-xrblock-xr-rtcp-meas-identity-04 A.5. draft-ietf-xrblock-xr-rtcp-meas-identity-04
The following are the major changes to The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-03: draft-ietf-xrblock-xr-rtcp-meas-identity-03:
o Change unit of measurement duration from ms to 1/65536 seconds. o Change unit of measurement duration from ms to 1/65536 seconds.
A.5. draft-ietf-xrblock-xr-rtcp-meas-identity-03 A.6. draft-ietf-xrblock-xr-rtcp-meas-identity-03
The following are the major changes to The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-02: draft-ietf-xrblock-xr-rtcp-meas-identity-02:
o The Editorial changes. o The Editorial changes.
A.6. draft-ietf-xrblock-xr-rtcp-meas-identity-02 A.7. draft-ietf-xrblock-xr-rtcp-meas-identity-02
The following are the major changes to The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-01: draft-ietf-xrblock-xr-rtcp-meas-identity-01:
o Relocating information that belong to SDES item and XR Block o Relocating information that belong to SDES item and XR Block
respectively in the section 1. respectively in the section 1.
o Rephrasing the text that describes SDES packet composition. o Rephrasing the text that describes SDES packet composition.
o Rephrasing identifier description. o Rephrasing identifier description.
o Other Editorial changes. o Other Editorial changes.
A.7. draft-ietf-xrblock-xr-rtcp-meas-identity-01 A.8. draft-ietf-xrblock-xr-rtcp-meas-identity-01
The following are the major changes to The following are the major changes to
draft-ietf-xrblock-xr-rtcp-meas-identity-00: draft-ietf-xrblock-xr-rtcp-meas-identity-00:
o Replace SDES item containing additional measurement information o Replace SDES item containing additional measurement information
with XR Block. with XR Block.
o Add section 2 to describe following RFC2119 language. o Add section 2 to describe following RFC2119 language.
o Add Section 1.2 to make SDES item and XR Report be compliant with o Add Section 1.2 to make SDES item and XR Report be compliant with
RFC3550 and RFC3611 RFC3550 and RFC3611
o Add Section 1.3 to make SDES item and XR Report follow Performance o Add Section 1.3 to make SDES item and XR Report follow Performance
Metrics Framework and RTP Monitoring Architecture. Metrics Framework and RTP Monitoring Architecture.
o Add section5.2 to register the new RTCP XR Block Type value. o Add section5.2 to register the new RTCP XR Block Type value.
o Remove RTCP SDES Type values that are needed. o Remove RTCP SDES Type values that are needed.
A.8. draft-ietf-xrblock-xr-rtcp-meas-identity-00 A.9. draft-ietf-xrblock-xr-rtcp-meas-identity-00
The following are the major changes to The following are the major changes to
draft-ietf-avt-rtcp-xr-meas-identity-02: draft-ietf-avt-rtcp-xr-meas-identity-02:
o Change the use of SDES item to convey measurement identity instead o Change the use of SDES item to convey measurement identity instead
of XR Block in section 2. of XR Block in section 2.
o Update references. o Update references.
o Update security section and remove SDP signaling section. o Update security section and remove SDP signaling section.
 End of changes. 23 change blocks. 
40 lines changed or deleted 62 lines changed or added

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