draft-ietf-xrblock-rtcp-xr-burst-gap-discard-10.txt   draft-ietf-xrblock-rtcp-xr-burst-gap-discard-11.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 R. Huang Intended status: Standards Track R. Huang
Expires: July 21, 2013 Q. Wu, Ed. Expires: October 13, 2013 Q. Wu, Ed.
Huawei Huawei
January 17, 2013 April 11, 2013
RTP Control Protocol(RTCP) Extended Report (XR) Block for Burst/Gap RTP Control Protocol(RTCP) Extended Report (XR) Block for Burst/Gap
Discard metric Reporting Discard metric Reporting
draft-ietf-xrblock-rtcp-xr-burst-gap-discard-10.txt draft-ietf-xrblock-rtcp-xr-burst-gap-discard-11.txt
Abstract Abstract
This document defines an RTP Control Protocol(RTCP) Extended Report This document defines an RTP Control Protocol(RTCP) Extended Report
(XR) Block that allows the reporting of Burst and Gap Discard metrics (XR) Block that allows the reporting of Burst and Gap Discard metrics
for use in a range of RTP applications. 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
skipping to change at page 1, line 35 skipping to change at page 1, line 35
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 July 21, 2013. This Internet-Draft will expire on October 13, 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
skipping to change at page 2, line 19 skipping to change at page 2, line 19
1.1. Burst and Gap Discard Report Block . . . . . . . . . . . . 3 1.1. Burst and Gap Discard 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 . . . . . . . . . . . . . . . . . . . . . . 4 1.4. Applicability . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Standards Language . . . . . . . . . . . . . . . . . . . . 5 2.1. Standards Language . . . . . . . . . . . . . . . . . . . . 5
3. Burst/Gap Discard Block . . . . . . . . . . . . . . . . . . . 6 3. Burst/Gap Discard Block . . . . . . . . . . . . . . . . . . . 6
3.1. Report Block Structure . . . . . . . . . . . . . . . . . . 6 3.1. Report Block Structure . . . . . . . . . . . . . . . . . . 6
3.2. Definition of Fields in Burst/Gap Discard Report Block . . 6 3.2. Definition of Fields in Burst/Gap Discard Report Block . . 6
3.3. Derived metrics based on reported metrics . . . . . . . . 8 3.3. Derived metrics based on reported metrics . . . . . . . . 8
4. Considerations for Voice-over-IP applications . . . . . . . . 9 4. Considerations for Voice-over-IP applications . . . . . . . . 10
5. SDP Signaling . . . . . . . . . . . . . . . . . . . . . . . . 10 5. SDP Signaling . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1. SDP rtcp-xr-attrib Attribute Extension . . . . . . . . . . 10 5.1. SDP rtcp-xr-attrib Attribute Extension . . . . . . . . . . 11
5.2. Offer/Answer Usage . . . . . . . . . . . . . . . . . . . . 10 5.2. Offer/Answer Usage . . . . . . . . . . . . . . . . . . . . 11
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
6.1. New RTCP XR Block Type value . . . . . . . . . . . . . . . 11 6.1. New RTCP XR Block Type value . . . . . . . . . . . . . . . 12
6.2. New RTCP XR SDP Parameter . . . . . . . . . . . . . . . . 11 6.2. New RTCP XR SDP Parameter . . . . . . . . . . . . . . . . 12
6.3. Contact information for registrations . . . . . . . . . . 11 6.3. Contact information for registrations . . . . . . . . . . 12
7. Security Considerations . . . . . . . . . . . . . . . . . . . 12 7. Security Considerations . . . . . . . . . . . . . . . . . . . 13
8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 13 8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 14
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 14 9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 15
10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 15 10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10.1. Normative References . . . . . . . . . . . . . . . . . . . 15 10.1. Normative References . . . . . . . . . . . . . . . . . . . 16
10.2. Informative References . . . . . . . . . . . . . . . . . . 15 10.2. Informative References . . . . . . . . . . . . . . . . . . 16
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 16 Appendix A. Metrics represented using RFC6390 Template . . . . . 17
A.1. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-10 . . . . . 16 Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 20
A.2. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-09 . . . . . 16 B.1. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-11 . . . . . 20
A.3. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-08 . . . . . 16 B.2. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-10 . . . . . 20
A.4. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-06 . . . . . 16 B.3. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-09 . . . . . 20
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 17 B.4. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-08 . . . . . 20
B.5. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-06 . . . . . 20
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction 1. Introduction
1.1. Burst and Gap Discard Report Block 1.1. Burst and Gap Discard Report Block
This document defines a new block type to augment those defined in This document 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 proportion of packets discarded by the supports the reporting of the proportion of packets discarded by the
receiver due to jitter. The discards during discard bursts are receiver due to jitter. The discards during discard bursts are
reported, together with the number of bursts. This block is intended reported, together with the number of bursts. This block is intended
skipping to change at page 4, line 8 skipping to change at page 4, line 8
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 [RFC6792] provides guideline for reporting Monitoring Architectures [RFC6792] provides guideline for reporting
block format using RTCP XR. The Metrics Block described in this block format using RTCP XR. The Metrics Block described in this
document are in accordance with the guidelines in [RFC6390] and document are in accordance with the guidelines in [RFC6390] and
[RFC6792]. [RFC6792].
1.4. Applicability 1.4. Applicability
These metrics are applicable to a range of RTP applications which These metrics are applicable to a range of RTP applications which
contain jitter buffers and don't use stream repair means,e.g., contain jitter buffers and don't use stream repair means, e.g.,
Forward Error Correction (FEC) [RFC5109] and/or retransmission Forward Error Correction (FEC) [RFC5109] and/or retransmission
[RFC4588]. [RFC4588].
2. Terminology 2. Terminology
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].
skipping to change at page 6, line 14 skipping to change at page 6, line 14
3. Burst/Gap Discard Block 3. Burst/Gap Discard Block
Metrics in this block report on Burst/Gap Discard in the stream Metrics in this block report on Burst/Gap Discard in the stream
arriving at the RTP system. The measurement of these metrics are arriving at the RTP system. The measurement of these metrics are
made at the receiving end of the RTP stream. Instances of this made at the receiving end of the RTP stream. Instances of this
Metrics Block refer by Synchronization source (SSRC) to the separate Metrics Block refer by Synchronization source (SSRC) to the separate
auxiliary Measurement Information block [RFC6776] which describes auxiliary Measurement Information block [RFC6776] which describes
measurement periods in use (see RFC6776 section 4.2). This Metrics measurement periods in use (see RFC6776 section 4.2). This Metrics
Block relies on the measurement period in the Measurement Information Block relies on the measurement period in the Measurement Information
block indicating the span of the report and SHOULD be sent in the block indicating the span of the report and MUST be sent in the same
same compound RTCP packet as the measurement information block. If compound RTCP packet as the measurement information block. If the
the measurement period is not received in the same compound RTCP measurement period is not received in the same compound RTCP packet
packet as this Metrics Block, this Metrics Block MUST be discarded. as this Metrics Block, this Metrics Block MUST be discarded.
3.1. Report Block Structure 3.1. Report Block Structure
Burst/Gap Discard metrics block Burst/Gap Discard metrics block
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BT=NBGD | I | resv. | block length = 3 | | BT=NBGD | I | resv. | block length = 3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
skipping to change at page 7, line 17 skipping to change at page 7, line 17
metrics reports. metrics reports.
I=11: Cumulative Duration - the reported value applies to the I=11: Cumulative Duration - the reported value applies to the
accumulation period characteristic of cumulative measurements. accumulation period characteristic of cumulative measurements.
I=01: Sampled Value - the reported value is a sampled I=01: Sampled Value - the reported value is a sampled
instantaneous value. instantaneous value.
In this document, Burst/Gap Discard Metrics can only be measured In this document, Burst/Gap Discard Metrics can only be measured
over definite intervals, and cannot be sampled. Accordingly, the over definite intervals, and cannot be sampled. Accordingly, the
value I=01, indicating a sampled value, MUST NOT be used. In value I=01, indicating a sampled value, MUST NOT be sent, and MUST
addition, the value I=00 is reserved and also MUST NOT be used. be discarded when received. In addition, the value I=00 is
The block MUST be discarded if the value I=01 or I=00 is received. reserved and also MUST NOT be sent, and MUST be discarded when
received.
Reserved (resv): 6 bits Reserved (resv): 6 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 (See RFC6709 section 4.2). ignored by receivers (See RFC6709 section 4.2).
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 Burst/Gap discard block, the block length is equal to 3. The the Burst/Gap discard block, the block length is equal to 3. The
skipping to change at page 8, line 5 skipping to change at page 8, line 9
The Threshold is equivalent to Gmin in [RFC3611], i.e. the number The Threshold is equivalent to Gmin in [RFC3611], i.e. the number
of successive packets that must not be discarded prior to and of successive packets that must not be discarded prior to and
following a discard packet in order for this discarded packet to following a discard packet in order for this discarded packet to
be regarded as part of a gap. be regarded as part of a gap.
Packets discarded in bursts: 24 bits Packets discarded in bursts: 24 bits
The total number of packets discarded during discard bursts. The total number of packets discarded during discard bursts.
If the measured value exceeds 0xFFFFFD, the value 0xFFFFFE MUST be The measured value is unsigned value. If the measured value
reported to indicate an over-range measurement. If the exceeds 0xFFFFFD, the value 0xFFFFFE MUST be reported to indicate
measurement is unavailable, the value 0xFFFFFF MUST be reported. an over-range measurement. If the measurement is unavailable, the
value 0xFFFFFF MUST be reported.
Total packets expected in bursts: 24 bits Total packets expected in bursts: 24 bits
The total number of packets expected during discarded bursts (that The total number of packets expected during discarded bursts (that
is, the sum of received packets and lost packets). is, the sum of received packets and lost packets).
If the measured value exceeds 0xFFFFFD, the value 0xFFFFFE MUST be The measured value is unsigned value. If the measured value
reported to indicate an over-range measurement. If the exceeds 0xFFFFFD, the value 0xFFFFFE MUST be reported to indicate
measurement is unavailable, the value 0xFFFFFF MUST be reported. an over-range measurement. If the measurement is unavailable, the
value 0xFFFFFF MUST be reported.
Reserved (resv): 8 bits Reserved (resv): 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 (See RFC6709 section 4.2). ignored by receivers (See RFC6709 section 4.2).
3.3. Derived metrics based on reported metrics 3.3. Derived metrics based on reported metrics
The metrics described here are intended to be used in conjunction The metrics described here are intended to be used in conjunction
with information from the Measurement Information block [RFC6776] with information from the Measurement Information block [RFC6776]
(which MUST be present in the same RTCP packet as the Burst/Gap (which must be present in the same RTCP packet as the Burst/Gap
Discard block) and also with the metric "number of packets discarded" Discard block) and also with the metric "number of packets discarded"
provided in the RTCP XR Discard Count Block [DISCARD]. The RTCP XR provided in the RTCP XR Discard Count Block [DISCARD]. The RTCP XR
Discard Count Block SHOULD be sent if the Burst/Gap Discard block is Discard Count Block should be sent if the Burst/Gap Discard block is
sent, but the converse does not apply. sent, but the converse does not apply.
These metrics provide the following information relevant to These metrics provide the following information relevant to
statistical parameters, including: statistical parameters, including:
o The fraction of packets discarded during bursts (burst discard o The fraction of packets discarded during bursts (burst discard
rate in [SUMSTAT]), which can be calculated using the metric " rate in [SUMSTAT]), which can be calculated using the metric "
Packets Discarded in Bursts " and the metric " Total Packets Packets Discarded in Bursts " and the metric " Total Packets
expected in Bursts " provided in the Burst/Gap Discard metrics expected in Bursts " provided in the Burst/Gap Discard metrics
block. block.
skipping to change at page 9, line 20 skipping to change at page 10, line 20
following considerations apply. following considerations apply.
RTCP XR views a call as being divided into bursts, which are periods RTCP XR views a call as being divided into bursts, which are periods
during which the discard rate is high enough to cause noticeable call during which the discard rate is high enough to cause noticeable call
quality degradation (generally over 5 percent discard rate), and quality degradation (generally over 5 percent discard rate), and
gaps, which are periods during which discarded packets are infrequent gaps, which are periods during which discarded packets are infrequent
and hence call quality is generally acceptable. and hence call quality is generally acceptable.
If Voice Activity Detection is used the Burst and Gap Duration shall If Voice Activity Detection is used the Burst and Gap Duration shall
be determined as if silence packets had been sent, i.e. a period of be determined as if silence packets had been sent, i.e. a period of
silence in excess of Gmin packets MUST terminate a burst condition. silence in excess of Gmin packets must terminate a burst condition.
The recommended value for the threshold Gmin in [RFC3611] results in The recommended value for the threshold Gmin in [RFC3611] results in
a Burst being a period of time during which the call quality is a Burst being a period of time during which the call quality is
degraded to a similar extent to a typical Pulse-Code Modulation(PCM) degraded to a similar extent to a typical Pulse-Code Modulation(PCM)
Severely Errored Second. Severely Errored Second.
5. SDP Signaling 5. 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.
5.1. SDP rtcp-xr-attrib Attribute Extension 5.1. SDP rtcp-xr-attrib Attribute Extension
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.
xr-format =/ xr-bgd-block xr-format =/ xr-bgd-block
xr-bgd-block = "brst-gap-dscrd" xr-bgd-block = "burst-gap-dscrd"
5.2. Offer/Answer Usage 5.2. Offer/Answer Usage
When SDP is used in offer-answer context, the SDP Offer/Answer usage When SDP is used in offer-answer context, the SDP Offer/Answer usage
defined in [RFC3611] for unilateral "rtcp-xr" attribute parameters defined in [RFC3611] for unilateral "rtcp-xr" attribute parameters
applies. For detailed usage in Offer/Answer for unilateral applies. For detailed usage in Offer/Answer for unilateral
parameter, refer to section 5.2 of [RFC3611]. parameter, refer to section 5.2 of [RFC3611].
6. IANA Considerations 6. IANA Considerations
skipping to change at page 11, line 22 skipping to change at page 12, line 22
This document assigns the block type value NBGD in the IANA " RTP This document assigns the block type value NBGD in the IANA " RTP
Control Protocol Extended Reports (RTCP XR) Block Type Registry " to Control Protocol Extended Reports (RTCP XR) Block Type Registry " to
the "Burst/Gap Discard Metrics Block". the "Burst/Gap Discard Metrics Block".
[Note to RFC Editor: please replace NBGD with the IANA provided RTCP [Note to RFC Editor: please replace NBGD with the IANA provided RTCP
XR block type for this block.] XR block type for this block.]
6.2. New RTCP XR SDP Parameter 6.2. New RTCP XR SDP Parameter
This document also registers a new parameter "brst-gap-dscrd" in the This document also registers a new parameter "burst-gap-dscrd" in the
"RTP Control Protocol Extended Reports (RTCP XR) Session Description "RTP Control Protocol Extended Reports (RTCP XR) Session Description
Protocol (SDP) Parameters Registry". Protocol (SDP) Parameters Registry".
6.3. Contact information for registrations 6.3. Contact information for registrations
The contact information for the registrations is: The contact information for the registrations is:
Qin Wu (sunseawq@huawei.com) Qin Wu (sunseawq@huawei.com)
101 Software Avenue, Yuhua District 101 Software Avenue, Yuhua District
skipping to change at page 15, line 51 skipping to change at page 16, line 51
Considerations for Protocol Extensions", RFC 6709, Considerations for Protocol Extensions", RFC 6709,
September 2012. September 2012.
[RFC6776] Wu, Q., "Measurement Identity and information Reporting [RFC6776] Wu, Q., "Measurement Identity and information Reporting
using SDES item and XR Block", RFC 6776, October 2012. using SDES item and XR Block", RFC 6776, October 2012.
[RFC6792] Hunt, G., "Monitoring Architectures for RTP", RFC 6792, [RFC6792] Hunt, G., "Monitoring Architectures for RTP", RFC 6792,
November 2012. November 2012.
[SUMSTAT] Zorn, G., "RTCP XR for Summary Statistics Metrics [SUMSTAT] Zorn, G., "RTCP XR for Summary Statistics Metrics
Reporting", ID draft-ietf-xrblock-rtcp-xr-summary-stat-05, Reporting", ID draft-ietf-xrblock-rtcp-xr-summary-stat-11,
December 2012. March 2013.
Appendix A. Change Log Appendix A. Metrics represented using RFC6390 Template
RFC EDITOR NOTE: please change XXXX in [RFCXXXX] by the new RFC
number, when assigned.
a. Threshold Metric
* Metric Name: Threshold in RTP
* Metric Description: The Threshold is equivalent to Gmin in
[RFC3611], i.e. the number of successive packets that must not
be discarded prior to and following a discard packet in order
for this discarded packet to be regarded as part of a gap.
* Method of Measurement or Calculation: See section 3.2,
Threshold definition [RFCXXXX].
* Units of Measurement: See section 3.2, Threshold definition
[RFCXXXX].
* Measurement Point(s) with Potential Measurement Domain: See
section 3, 1st paragraph [RFCXXXX].
* Measurement Timing: See section 3, 1st paragraph [RFCXXXX] for
measurement timing and section 3.2 [RFCXXXX] for Interval
Metric flag.
* Use and applications: See section 1.4 [RFCXXXX].
* Reporting model: See RFC3611.
b. Packets discarded in bursts Metric
* Metric Name: RTP Packets discarded in bursts
* Metric Description: The total number of RTP packets discarded
during discard bursts.
* Method of Measurement or Calculation: See section 3.2, Packets
discarded in bursts definition [RFCXXXX].
* Units of Measurement: See section 3.2, Packets discarded in
bursts definition [RFCXXXX].
* Measurement Point(s) with Potential Measurement Domain: See
section 3, 1st paragraph [RFCXXXX].
* Measurement Timing: See section 3, 1st paragraph [RFCXXXX] for
measurement timing and section 3.2 [RFCXXXX] for Interval
Metric flag.
* Use and applications: See section 1.4 [RFCXXXX].
* Reporting model: See RFC3611.
c. Total packets expected in bursts Metric
* Metric Name: Total RTP packets expected in bursts
* Metric Description: The total number of packets expected
during discarded bursts (that is, the sum of received packets
and lost packets).
* Method of Measurement or Calculation: See section 3.2, Total
packets expected in bursts definition [RFCXXXX].
* Units of Measurement: See section 3.2, Total packets expected
in bursts definition [RFCXXXX].
* Measurement Point(s) with Potential Measurement Domain: See
section 3, 1st paragraph [RFCXXXX].
* Measurement Timing: See section 3, 1st paragraph [RFCXXXX] for
measurement timing and section 3.2 [RFCXXXX] for Interval
Metric flag.
* Use and applications: See section 1.4 [RFCXXXX].
* Reporting model: See RFC3611.
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.
A.1. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-10 B.1. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-11
The following are the major changes compared to previous version:
o Similar changes to Burst Gap loss draft to address IESG review
comments apply to this document.
B.2. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-10
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
o Move RFC6709 as one informative reference. o Move RFC6709 as one informative reference.
A.2. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-09 B.3. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-09
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
o Editorial changes based on comments received in WGLC. o Editorial changes based on comments received in WGLC.
A.3. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-08 B.4. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-08
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
o SDP update based on SDP Directorate Review. o SDP update based on SDP Directorate Review.
o Add some texts to get consistent with RFC6798 and Delay draft. o Add some texts to get consistent with RFC6798 and Delay draft.
A.4. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-06 B.5. draft-ietf-xrblock-rtcp-xr-burst-gap-discard-06
The following are the major changes compared to previous version: The following are the major changes compared to previous version:
o Outdated reference update. o Outdated reference update.
o Editorial changes based on comments that applied to PDV and Delay o Editorial changes based on comments that applied to PDV and Delay
drafts. drafts.
Authors' Addresses Authors' Addresses
 End of changes. 21 change blocks. 
50 lines changed or deleted 142 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/