draft-ietf-xrblock-rtcp-xr-synchronization-05.txt   draft-ietf-xrblock-rtcp-xr-synchronization-06.txt 
Network Working Group H. Asaeda Network Working Group H. Asaeda
Internet-Draft NICT Internet-Draft NICT
Intended status: Standards Track R. Huang Intended status: Standards Track R. Huang
Expires: November 25, 2013 Q. Wu Expires: November 30, 2013 Q. Wu
Huawei Huawei
May 24, 2013 May 29, 2013
RTP Control Protocol (RTCP) Extended Report (XR) Blocks for RTP Control Protocol (RTCP) Extended Report (XR) Blocks for
Synchronization Delay and Offset Metrics Reporting Synchronization Delay and Offset Metrics Reporting
draft-ietf-xrblock-rtcp-xr-synchronization-05 draft-ietf-xrblock-rtcp-xr-synchronization-06
Abstract Abstract
This document defines two RTP Control Protocol (RTCP) Extended Report This document defines two RTP Control Protocol (RTCP) Extended Report
(XR) Blocks that allow the reporting of synchronization delay and (XR) Blocks that allow the reporting of synchronization delay and
offset metrics for use in a range of RTP applications. offset 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
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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-
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 25, 2013. This Internet-Draft will expire on November 30, 2013.
Copyright Notice Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the Copyright (c) 2013 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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5.1. SDP rtcp-xr-attrib Attribute Extension . . . . . . . . . . 9 5.1. SDP rtcp-xr-attrib Attribute Extension . . . . . . . . . . 9
5.2. Offer/Answer Usage . . . . . . . . . . . . . . . . . . . . 9 5.2. Offer/Answer Usage . . . . . . . . . . . . . . . . . . . . 9
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
7. Security Considerations . . . . . . . . . . . . . . . . . . . 10 7. Security Considerations . . . . . . . . . . . . . . . . . . . 10
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.1. Normative References . . . . . . . . . . . . . . . . . . . 11 9.1. Normative References . . . . . . . . . . . . . . . . . . . 11
9.2. Informative References . . . . . . . . . . . . . . . . . . 11 9.2. Informative References . . . . . . . . . . . . . . . . . . 11
Appendix A. Metrics represented using RFC6390 Template . . . . . 12 Appendix A. Metrics represented using RFC6390 Template . . . . . 12
Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 13 Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 13
B.1. draft-ietf-xrblock-rtcp-xr-syncronization-05 . . . . . . . 13 B.1. draft-ietf-xrblock-rtcp-xr-syncronization-06 . . . . . . . 13
B.2. draft-ietf-xrblock-rtcp-xr-syncronization-04 . . . . . . . 13 B.2. draft-ietf-xrblock-rtcp-xr-syncronization-05 . . . . . . . 13
B.3. draft-ietf-xrblock-rtcp-xr-syncronization-03 . . . . . . . 13 B.3. draft-ietf-xrblock-rtcp-xr-syncronization-04 . . . . . . . 13
B.4. draft-ietf-xrblock-rtcp-xr-syncronization-02 . . . . . . . 13 B.4. draft-ietf-xrblock-rtcp-xr-syncronization-03 . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 13 B.5. draft-ietf-xrblock-rtcp-xr-syncronization-02 . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction 1. Introduction
1.1. Synchronization Delay and Offset Metrics Reporting Blocks 1.1. Synchronization Delay and Offset Metrics Reporting Blocks
This document defines two new block types to augment those defined in This document defines two new block types to augment those defined in
[RFC3611], for use in a range of RTP applications. [RFC3611], for use in a range of RTP applications.
The first new block type supports reporting of Initial The first new block type supports reporting of Initial
Synchronization Delay to establish multimedia session. Information Synchronization Delay to establish multimedia session. Information
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
3.2. Definition of Fields in RTP Flow Initial Synchronization Delay 3.2. Definition of Fields in RTP Flow Initial Synchronization Delay
Metrics Block Metrics Block
Block type (BT): 8 bits Block type (BT): 8 bits
The RTP Flows Initial Synchronization Delay Report Block is The RTP Flows Initial Synchronization Delay Report Block is
identified by the constant <RFISD>. identified by the constant <RFISD>.
[Note to RFC Editor: please replace RFISD with the IANA provided
RTCP XR block type for this block.]
Reserved: 8 bits Reserved: 8 bits
This field is reserved for future definition. In the absence of This field is reserved for future definition. In the absence of
such a definition, the bits in this field MUST be set to zero and such a definition, the bits in this field MUST be set to zero and
ignored by the receiver. ignored by the receiver.
Block length: 16 bits Block length: 16 bits
The constant 2, in accordance with the definition of this field in The constant 2, in accordance with the definition of this field in
Section 3 of RFC 3611 [RFC3611]. Section 3 of RFC 3611 [RFC3611].
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
4.2. Definition of Fields in RTP Flow General Synchronization Offset 4.2. Definition of Fields in RTP Flow General Synchronization Offset
Metrics Block Metrics Block
Block type (BT): 8 bits Block type (BT): 8 bits
The RTP Flow General Synchronization Offset Report Block is The RTP Flow General Synchronization Offset Report Block is
identified by the constant <RFSO>. identified by the constant <RFSO>.
[Note to RFC Editor: please replace RFSO with the IANA provided
RTCP XR block type for this block.]
Interval Metric Flag (I): 2 bits Interval Metric Flag (I): 2 bits
This field is used to indicate whether the Burst/Gap Discard This field is used to indicate whether the Burst/Gap Discard
Summary Statistics metrics are Sampled, Interval or Cumulative Summary Statistics metrics are Sampled, Interval or Cumulative
metrics: metrics:
I=10: Interval Duration - the reported value applies to the I=10: Interval Duration - the reported value applies to the
most recent measurement interval duration between successive most recent measurement interval duration between successive
metrics reports. metrics reports.
I=11: Cumulative Duration - the reported value applies to the I=11: Cumulative Duration - the reported value applies to the
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* Use and applications: See section 1.4 [RFCXXXX]. * Use and applications: See section 1.4 [RFCXXXX].
* Reporting model: See RFC3611. * Reporting model: See RFC3611.
Appendix B. Change Log Appendix B. 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.
B.1. draft-ietf-xrblock-rtcp-xr-syncronization-05 B.1. draft-ietf-xrblock-rtcp-xr-syncronization-06
The following are the major changes compared to previous version:
Some Editorial changes.
B.2. draft-ietf-xrblock-rtcp-xr-syncronization-05
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
Editorial changes and typo fixed. Editorial changes and typo fixed.
B.2. draft-ietf-xrblock-rtcp-xr-syncronization-04 B.3. draft-ietf-xrblock-rtcp-xr-syncronization-04
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
Additional text to clarify on how to distinguish report stream Additional text to clarify on how to distinguish report stream
from reference stream. from reference stream.
Other Editorial changes. Other Editorial changes.
B.3. draft-ietf-xrblock-rtcp-xr-syncronization-03 B.4. draft-ietf-xrblock-rtcp-xr-syncronization-03
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
Remove the need to signal the reference source in the Remove the need to signal the reference source in the
synchronisation offset metrics RTCP XR report. synchronisation offset metrics RTCP XR report.
Apply RFC6390 template to metrics in the appendix. Apply RFC6390 template to metrics in the appendix.
Other editorial changes to get inline with other XRBLOCK drafts. Other editorial changes to get inline with other XRBLOCK drafts.
B.4. draft-ietf-xrblock-rtcp-xr-syncronization-02 B.5. draft-ietf-xrblock-rtcp-xr-syncronization-02
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
Editorial change based on comments raised on the list and in the Editorial change based on comments raised on the list and in the
IETF85 meeting IETF85 meeting
Authors' Addresses Authors' Addresses
Hitoshi Asaeda Hitoshi Asaeda
National Institute of Information and Communications Technology National Institute of Information and Communications Technology
 End of changes. 11 change blocks. 
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