draft-ietf-ippm-spatial-composition-15.txt | draft-ietf-ippm-spatial-composition-16.txt | |||
---|---|---|---|---|

Network Working Group A. Morton | Network Working Group A. Morton | |||

Internet-Draft AT&T Labs | Internet-Draft AT&T Labs | |||

Intended status: Standards Track E. Stephan | Intended status: Standards Track E. Stephan | |||

Expires: January 3, 2011 France Telecom Division R&D | Expires: February 14, 2011 France Telecom Division R&D | |||

July 2, 2010 | August 13, 2010 | |||

Spatial Composition of Metrics | Spatial Composition of Metrics | |||

draft-ietf-ippm-spatial-composition-15 | draft-ietf-ippm-spatial-composition-16 | |||

Abstract | Abstract | |||

This memo utilizes IP Performance Metrics that are applicable to both | This memo utilizes IP Performance Metrics that are applicable to both | |||

complete paths and sub-paths, and defines relationships to compose a | complete paths and sub-paths, and defines relationships to compose a | |||

complete path metric from the sub-path metrics with some accuracy | complete path metric from the sub-path metrics with some accuracy | |||

w.r.t. the actual metrics. This is called Spatial Composition in RFC | w.r.t. the actual metrics. This is called Spatial Composition in RFC | |||

2330. The memo refers to the Framework for Metric Composition, and | 2330. The memo refers to the Framework for Metric Composition, and | |||

provides background and motivation for combining metrics to derive | provides background and motivation for combining metrics to derive | |||

others. The descriptions of several composed metrics and statistics | others. The descriptions of several composed metrics and statistics | |||

skipping to change at page 1, line 47 | skipping to change at page 1, line 47 | |||

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 January 3, 2011. | This Internet-Draft will expire on February 14, 2011. | |||

Copyright Notice | Copyright Notice | |||

Copyright (c) 2010 IETF Trust and the persons identified as the | Copyright (c) 2010 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 | |||

carefully, as they describe your rights and restrictions with respect | carefully, as they describe your rights and restrictions with respect | |||

skipping to change at page 3, line 26 | skipping to change at page 3, line 26 | |||

3.1.2. Definition and Metric Units . . . . . . . . . . . . . 9 | 3.1.2. Definition and Metric Units . . . . . . . . . . . . . 9 | |||

3.1.3. Discussion and other details . . . . . . . . . . . . . 9 | 3.1.3. Discussion and other details . . . . . . . . . . . . . 9 | |||

3.1.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 9 | 3.1.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 9 | |||

3.1.5. Composition Function . . . . . . . . . . . . . . . . . 9 | 3.1.5. Composition Function . . . . . . . . . . . . . . . . . 9 | |||

3.1.6. Statement of Conjecture and Assumptions . . . . . . . 9 | 3.1.6. Statement of Conjecture and Assumptions . . . . . . . 9 | |||

3.1.7. Justification of the Composition Function . . . . . . 9 | 3.1.7. Justification of the Composition Function . . . . . . 9 | |||

3.1.8. Sources of Deviation from the Ground Truth . . . . . . 10 | 3.1.8. Sources of Deviation from the Ground Truth . . . . . . 10 | |||

3.1.9. Specific cases where the conjecture might fail . . . . 11 | 3.1.9. Specific cases where the conjecture might fail . . . . 11 | |||

3.1.10. Application of Measurement Methodology . . . . . . . . 11 | 3.1.10. Application of Measurement Methodology . . . . . . . . 11 | |||

4. One-way Delay Composed Metrics and Statistics . . . . . . . . 12 | 4. One-way Delay Composed Metrics and Statistics . . . . . . . . 12 | |||

4.1. Name: | 4.1. Name: Type-P-Finite-One-way-Delay-<Sample>-Stream . . . . 12 | |||

Type-P-Finite-One-way-Delay-Poisson/Periodic-Stream . . . 12 | ||||

4.1.1. Metric Parameters . . . . . . . . . . . . . . . . . . 12 | 4.1.1. Metric Parameters . . . . . . . . . . . . . . . . . . 12 | |||

4.1.2. Definition and Metric Units . . . . . . . . . . . . . 12 | 4.1.2. Definition and Metric Units . . . . . . . . . . . . . 12 | |||

4.1.3. Discussion and other details . . . . . . . . . . . . . 12 | 4.1.3. Discussion and other details . . . . . . . . . . . . . 12 | |||

4.1.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 13 | 4.1.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 13 | |||

4.2. Name: Type-P-Finite-Composite-One-way-Delay-Mean . . . . . 13 | 4.2. Name: Type-P-Finite-Composite-One-way-Delay-Mean . . . . . 13 | |||

4.2.1. Metric Parameters . . . . . . . . . . . . . . . . . . 13 | 4.2.1. Metric Parameters . . . . . . . . . . . . . . . . . . 13 | |||

4.2.2. Definition and Metric Units of the Mean Statistic . . 13 | 4.2.2. Definition and Metric Units of the Mean Statistic . . 13 | |||

4.2.3. Discussion and other details . . . . . . . . . . . . . 13 | 4.2.3. Discussion and other details . . . . . . . . . . . . . 14 | |||

4.2.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 13 | 4.2.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 14 | |||

4.2.5. Composition Function: Sum of Means . . . . . . . . . . 13 | 4.2.5. Composition Function: Sum of Means . . . . . . . . . . 14 | |||

4.2.6. Statement of Conjecture and Assumptions . . . . . . . 14 | 4.2.6. Statement of Conjecture and Assumptions . . . . . . . 14 | |||

4.2.7. Justification of the Composition Function . . . . . . 14 | 4.2.7. Justification of the Composition Function . . . . . . 14 | |||

4.2.8. Sources of Deviation from the Ground Truth . . . . . . 14 | 4.2.8. Sources of Deviation from the Ground Truth . . . . . . 14 | |||

4.2.9. Specific cases where the conjecture might fail . . . . 14 | 4.2.9. Specific cases where the conjecture might fail . . . . 15 | |||

4.2.10. Application of Measurement Methodology . . . . . . . . 15 | 4.2.10. Application of Measurement Methodology . . . . . . . . 15 | |||

4.3. Name: Type-P-Finite-Composite-One-way-Delay-Minimum . . . 15 | 4.3. Name: Type-P-Finite-Composite-One-way-Delay-Minimum . . . 15 | |||

4.3.1. Metric Parameters . . . . . . . . . . . . . . . . . . 15 | 4.3.1. Metric Parameters . . . . . . . . . . . . . . . . . . 15 | |||

4.3.2. Definition and Metric Units of the Minimum | 4.3.2. Definition and Metric Units of the Minimum | |||

Statistic . . . . . . . . . . . . . . . . . . . . . . 15 | Statistic . . . . . . . . . . . . . . . . . . . . . . 15 | |||

4.3.3. Discussion and other details . . . . . . . . . . . . . 15 | 4.3.3. Discussion and other details . . . . . . . . . . . . . 16 | |||

4.3.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 15 | 4.3.4. Statistic: . . . . . . . . . . . . . . . . . . . . . . 16 | |||

4.3.5. Composition Function: Sum of Minima . . . . . . . . . 15 | 4.3.5. Composition Function: Sum of Minima . . . . . . . . . 16 | |||

4.3.6. Statement of Conjecture and Assumptions . . . . . . . 16 | 4.3.6. Statement of Conjecture and Assumptions . . . . . . . 16 | |||

4.3.7. Justification of the Composition Function . . . . . . 16 | 4.3.7. Justification of the Composition Function . . . . . . 16 | |||

4.3.8. Sources of Deviation from the Ground Truth . . . . . . 16 | 4.3.8. Sources of Deviation from the Ground Truth . . . . . . 16 | |||

4.3.9. Specific cases where the conjecture might fail . . . . 16 | 4.3.9. Specific cases where the conjecture might fail . . . . 17 | |||

4.3.10. Application of Measurement Methodology . . . . . . . . 16 | 4.3.10. Application of Measurement Methodology . . . . . . . . 17 | |||

5. Loss Metrics and Statistics . . . . . . . . . . . . . . . . . 16 | 5. Loss Metrics and Statistics . . . . . . . . . . . . . . . . . 17 | |||

5.1. Type-P-Composite-One-way-Packet-Loss-Empirical-Probability 16 | 5.1. Type-P-Composite-One-way-Packet-Loss-Empirical-Probability 17 | |||

5.1.1. Metric Parameters: . . . . . . . . . . . . . . . . . . 17 | 5.1.1. Metric Parameters: . . . . . . . . . . . . . . . . . . 17 | |||

5.1.2. Definition and Metric Units . . . . . . . . . . . . . 17 | 5.1.2. Definition and Metric Units . . . . . . . . . . . . . 17 | |||

5.1.3. Discussion and other details . . . . . . . . . . . . . 17 | 5.1.3. Discussion and other details . . . . . . . . . . . . . 17 | |||

5.1.4. Statistic: | 5.1.4. Statistic: | |||

Type-P-One-way-Packet-Loss-Empirical-Probability . . . 17 | Type-P-One-way-Packet-Loss-Empirical-Probability . . . 17 | |||

5.1.5. Composition Function: Composition of Empirical | 5.1.5. Composition Function: Composition of Empirical | |||

Probabilities . . . . . . . . . . . . . . . . . . . . 17 | Probabilities . . . . . . . . . . . . . . . . . . . . 18 | |||

5.1.6. Statement of Conjecture and Assumptions . . . . . . . 18 | 5.1.6. Statement of Conjecture and Assumptions . . . . . . . 18 | |||

5.1.7. Justification of the Composition Function . . . . . . 18 | 5.1.7. Justification of the Composition Function . . . . . . 18 | |||

5.1.8. Sources of Deviation from the Ground Truth . . . . . . 18 | 5.1.8. Sources of Deviation from the Ground Truth . . . . . . 18 | |||

5.1.9. Specific cases where the conjecture might fail . . . . 18 | 5.1.9. Specific cases where the conjecture might fail . . . . 18 | |||

5.1.10. Application of Measurement Methodology . . . . . . . . 18 | 5.1.10. Application of Measurement Methodology . . . . . . . . 19 | |||

6. Delay Variation Metrics and Statistics . . . . . . . . . . . . 18 | 6. Delay Variation Metrics and Statistics . . . . . . . . . . . . 19 | |||

6.1. Name: Type-P-One-way-pdv-refmin-Poisson/Periodic-Stream . 18 | 6.1. Name: Type-P-One-way-pdv-refmin-<Sample>-Stream . . . . . 19 | |||

6.1.1. Metric Parameters: . . . . . . . . . . . . . . . . . . 19 | 6.1.1. Metric Parameters: . . . . . . . . . . . . . . . . . . 19 | |||

6.1.2. Definition and Metric Units . . . . . . . . . . . . . 19 | 6.1.2. Definition and Metric Units . . . . . . . . . . . . . 20 | |||

6.1.3. Discussion and other details . . . . . . . . . . . . . 20 | 6.1.3. Discussion and other details . . . . . . . . . . . . . 20 | |||

6.1.4. Statistics: Mean, Variance, Skewness, Quantile . . . . 20 | 6.1.4. Statistics: Mean, Variance, Skewness, Quantile . . . . 20 | |||

6.1.5. Composition Functions: . . . . . . . . . . . . . . . . 21 | 6.1.5. Composition Functions: . . . . . . . . . . . . . . . . 21 | |||

6.1.6. Statement of Conjecture and Assumptions . . . . . . . 22 | 6.1.6. Statement of Conjecture and Assumptions . . . . . . . 22 | |||

6.1.7. Justification of the Composition Function . . . . . . 22 | 6.1.7. Justification of the Composition Function . . . . . . 23 | |||

6.1.8. Sources of Deviation from the Ground Truth . . . . . . 22 | 6.1.8. Sources of Deviation from the Ground Truth . . . . . . 23 | |||

6.1.9. Specific cases where the conjecture might fail . . . . 22 | 6.1.9. Specific cases where the conjecture might fail . . . . 23 | |||

6.1.10. Application of Measurement Methodology . . . . . . . . 23 | 6.1.10. Application of Measurement Methodology . . . . . . . . 23 | |||

7. Security Considerations . . . . . . . . . . . . . . . . . . . 23 | 7. Security Considerations . . . . . . . . . . . . . . . . . . . 23 | |||

7.1. Denial of Service Attacks . . . . . . . . . . . . . . . . 23 | 7.1. Denial of Service Attacks . . . . . . . . . . . . . . . . 23 | |||

7.2. User Data Confidentiality . . . . . . . . . . . . . . . . 23 | 7.2. User Data Confidentiality . . . . . . . . . . . . . . . . 24 | |||

7.3. Interference with the metrics . . . . . . . . . . . . . . 23 | 7.3. Interference with the metrics . . . . . . . . . . . . . . 24 | |||

8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 24 | 8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 24 | |||

9. Contributors and Acknowledgements . . . . . . . . . . . . . . 27 | 9. Contributors and Acknowledgements . . . . . . . . . . . . . . 27 | |||

10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 27 | 10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 28 | |||

10.1. Normative References . . . . . . . . . . . . . . . . . . . 27 | 10.1. Normative References . . . . . . . . . . . . . . . . . . . 28 | |||

10.2. Informative References . . . . . . . . . . . . . . . . . . 28 | 10.2. Informative References . . . . . . . . . . . . . . . . . . 29 | |||

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 | Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 | |||

Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 29 | Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 29 | |||

1. Introduction | 1. Introduction | |||

The IP Performance Metrics (IPPM) framework [RFC2330] describes two | The IP Performance Metrics (IPPM) framework [RFC2330] describes two | |||

forms of metric composition, spatial and temporal. The composition | forms of metric composition, spatial and temporal. The composition | |||

framework [RFC5835] expands and further qualifies these original | framework [RFC5835] expands and further qualifies these original | |||

forms into three categories. This memo describes Spatial | forms into three categories. This memo describes Spatial | |||

Composition, one of the categories of metrics under the umbrella of | Composition, one of the categories of metrics under the umbrella of | |||

the composition framework. | the composition framework. | |||

skipping to change at page 7, line 23 | skipping to change at page 7, line 23 | |||

similar packets sent and collected separately in each sub-path. | similar packets sent and collected separately in each sub-path. | |||

Requires homogeneity of measurement methodologies, or can allow a | Requires homogeneity of measurement methodologies, or can allow a | |||

degree of flexibility (e.g., active or passive methods produce the | degree of flexibility (e.g., active or passive methods produce the | |||

"same" metric). Also, the applicable sending streams will be | "same" metric). Also, the applicable sending streams will be | |||

specified, such as Poisson, Periodic, or both. | specified, such as Poisson, Periodic, or both. | |||

Needs information or access that will only be available within an | Needs information or access that will only be available within an | |||

operator's domain, or is applicable to Inter-domain composition. | operator's domain, or is applicable to Inter-domain composition. | |||

Requires synchronized measurement time intervals in all sub-paths, or | Requires synchronized measurement start and stop times in all sub- | |||

largely overlapping, or no timing requirements. | paths, or largely overlapping, or no timing requirements. | |||

Requires assumption of sub-path independence w.r.t. the metric being | Requires assumption of sub-path independence w.r.t. the metric being | |||

defined/composed, or other assumptions. | defined/composed, or other assumptions. | |||

Has known sources of inaccuracy/error, and identifies the sources. | Has known sources of inaccuracy/error, and identifies the sources. | |||

2.3. Incomplete Information | 2.3. Incomplete Information | |||

In practice, when measurements cannot be initiated on a sub-path (and | In practice, when measurements cannot be initiated on a sub-path (and | |||

perhaps the measurement system gives up during the test interval), | perhaps the measurement system gives up during the test interval), | |||

skipping to change at page 9, line 10 | skipping to change at page 9, line 10 | |||

o M, the total number of packets sent between T0 and Tf | o M, the total number of packets sent between T0 and Tf | |||

o N, the total number of packets received at Dst (sent between T0 | o N, the total number of packets received at Dst (sent between T0 | |||

and Tf) | and Tf) | |||

o S, the number of sub-paths involved in the complete Src-Dst path | o S, the number of sub-paths involved in the complete Src-Dst path | |||

o Type-P, as defined in [RFC2330], which includes any field that may | o Type-P, as defined in [RFC2330], which includes any field that may | |||

affect a packet's treatment as it traverses the network | affect a packet's treatment as it traverses the network | |||

In metric names, the term <Sample> is intended to be replaced by the | ||||

name of the method used to define a sample of values of parameter | ||||

TstampSrc. This can be done in several ways, including: | ||||

1. Poisson: a pseudo-random Poisson process of rate lambda, whose | ||||

values fall between T and Tf. The time interval between | ||||

successive values of TstampSrc will then average 1/lambda, as per | ||||

[RFC2330]. | ||||

2. Periodic: a periodic stream process with pseudo-random start time | ||||

T0 between T and dT, and nominal inter-packet interval incT, as | ||||

per [RFC3432]. | ||||

3.1.2. Definition and Metric Units | 3.1.2. Definition and Metric Units | |||

This section is unique for every metric. | This section is unique for every metric. | |||

3.1.3. Discussion and other details | 3.1.3. Discussion and other details | |||

This section is unique for every metric. | This section is unique for every metric. | |||

3.1.4. Statistic: | 3.1.4. Statistic: | |||

This section is unique for every metric. | This section is unique for every metric. | |||

3.1.5. Composition Function | 3.1.5. Composition Function | |||

This section is unique for every metric. | This section is unique for every metric. | |||

3.1.6. Statement of Conjecture and Assumptions | 3.1.6. Statement of Conjecture and Assumptions | |||

This section is unique for each metric. | This section is unique for each metric. The term "ground truth" | |||

frequently used in these sections and it is defined in section 4.7 of | ||||

[RFC5835]. | ||||

3.1.7. Justification of the Composition Function | 3.1.7. Justification of the Composition Function | |||

It is sometimes impractical to conduct active measurements between | It is sometimes impractical to conduct active measurements between | |||

every Src-Dst pair. Since the full mesh of N measurement points | every Src-Dst pair. Since the full mesh of N measurement points | |||

grows as N x N, the scope of measurement may be limited by testing | grows as N x N, the scope of measurement may be limited by testing | |||

resources. | resources. | |||

There may be varying limitations on active testing in different parts | There may be varying limitations on active testing in different parts | |||

of the network. For example, it may not be possible to collect the | of the network. For example, it may not be possible to collect the | |||

skipping to change at page 10, line 52 | skipping to change at page 11, line 16 | |||

next sub-path are injected just after the same exchange point. | next sub-path are injected just after the same exchange point. | |||

Clearly, the set of sub-path measurements SHOULD cover all critical | Clearly, the set of sub-path measurements SHOULD cover all critical | |||

network elements in the complete path. | network elements in the complete path. | |||

3.1.8.4. Absence of route | 3.1.8.4. Absence of route | |||

At a specific point in time, no viable route exists between the | At a specific point in time, no viable route exists between the | |||

complete path source and destination. The routes selected for one or | complete path source and destination. The routes selected for one or | |||

more sub-paths therefore differs from the complete path. | more sub-paths therefore differs from the complete path. | |||

Consequently, spatial composition may produce finite estimation of a | Consequently, spatial composition may produce finite estimation of a | |||

ground truth metric between a source and a destination, even when the | ground truth metric (see section 4.7 of [RFC5835]) between a source | |||

route between them is undefined. | and a destination, even when the route between them is undefined. | |||

3.1.9. Specific cases where the conjecture might fail | 3.1.9. Specific cases where the conjecture might fail | |||

This section is unique for most metrics (see the metric-specific | This section is unique for most metrics (see the metric-specific | |||

sections). | sections). | |||

For delay-related metrics, One-way delay always depends on packet | For delay-related metrics, One-way delay always depends on packet | |||

size and link capacity, since it is measured in [RFC2679] from first | size and link capacity, since it is measured in [RFC2679] from first | |||

bit to last bit. If the size of an IP packet changes on route (due | bit to last bit. If the size of an IP packet changes on route (due | |||

to encapsulation), this can influence delay performance. However, | to encapsulation), this can influence delay performance. However, | |||

skipping to change at page 12, line 10 | skipping to change at page 12, line 22 | |||

Applies to both Inter-domain and Intra-domain composition. | Applies to both Inter-domain and Intra-domain composition. | |||

SHOULD have synchronized measurement time intervals in all sub-paths, | SHOULD have synchronized measurement time intervals in all sub-paths, | |||

but largely overlapping intervals MAY suffice. | but largely overlapping intervals MAY suffice. | |||

Assumption of sub-path independence w.r.t. the metric being defined/ | Assumption of sub-path independence w.r.t. the metric being defined/ | |||

composed is REQUIRED. | composed is REQUIRED. | |||

4. One-way Delay Composed Metrics and Statistics | 4. One-way Delay Composed Metrics and Statistics | |||

4.1. Name: Type-P-Finite-One-way-Delay-Poisson/Periodic-Stream | 4.1. Name: Type-P-Finite-One-way-Delay-<Sample>-Stream | |||

This metric is a necessary element of Delay Composition metrics, and | This metric is a necessary element of Delay Composition metrics, and | |||

its definition does not formally exist elsewhere in IPPM literature. | its definition does not formally exist elsewhere in IPPM literature. | |||

4.1.1. Metric Parameters | 4.1.1. Metric Parameters | |||

See the common parameters section above. | See the common parameters section above. | |||

4.1.2. Definition and Metric Units | 4.1.2. Definition and Metric Units | |||

Using the parameters above, we obtain the value of Type-P-One-way- | Using the parameters above, we obtain the value of Type-P-One-way- | |||

Delay singleton as per [RFC2679]. | Delay singleton as per [RFC2679]. | |||

For each packet [i] that has a finite One-way Delay (in other words, | For each packet [i] that has a finite One-way Delay (in other words, | |||

excluding packets which have undefined one-way delay): | excluding packets which have undefined one-way delay): | |||

Type-P-Finite-One-way-Delay-Poisson/Periodic-Stream[i] = | Type-P-Finite-One-way-Delay-<Sample>-Stream[i] = | |||

FiniteDelay[i] = TstampDst - TstampSrc | FiniteDelay[i] = TstampDst - TstampSrc | |||

The units of measure for this metric are time in seconds, expressed | The units of measure for this metric are time in seconds, expressed | |||

in sufficiently low resolution to convey meaningful quantitative | in sufficiently low resolution to convey meaningful quantitative | |||

information. For example, resolution of microseconds is usually | information. For example, resolution of microseconds is usually | |||

sufficient. | sufficient. | |||

4.1.3. Discussion and other details | 4.1.3. Discussion and other details | |||

skipping to change at page 13, line 14 | skipping to change at page 13, line 26 | |||

4.1.4. Statistic: | 4.1.4. Statistic: | |||

All statistics defined in [RFC2679] are applicable to the finite one- | All statistics defined in [RFC2679] are applicable to the finite one- | |||

way delay,and additional metrics are possible, such as the mean (see | way delay,and additional metrics are possible, such as the mean (see | |||

below). | below). | |||

4.2. Name: Type-P-Finite-Composite-One-way-Delay-Mean | 4.2. Name: Type-P-Finite-Composite-One-way-Delay-Mean | |||

This section describes a statistic based on the Type-P-Finite-One- | This section describes a statistic based on the Type-P-Finite-One- | |||

way-Delay-Poisson/Periodic-Stream metric. | way-Delay-<Sample>-Stream metric. | |||

4.2.1. Metric Parameters | 4.2.1. Metric Parameters | |||

See the common parameters section above. | See the common parameters section above. | |||

4.2.2. Definition and Metric Units of the Mean Statistic | 4.2.2. Definition and Metric Units of the Mean Statistic | |||

We define | We define | |||

Type-P-Finite-One-way-Delay-Mean = | Type-P-Finite-One-way-Delay-Mean = | |||

N | N | |||

--- | --- | |||

1 \ | 1 \ | |||

MeanDelay = - * > (FiniteDelay [n]) | = MeanDelay = - * > (FiniteDelay [n]) | |||

N / | N / | |||

--- | --- | |||

n = 1 | n = 1 | |||

where all packets n= 1 through N have finite singleton delays. | where all packets n= 1 through N have finite singleton delays. | |||

The units of measure for this metric are time in seconds, expressed | The units of measure for this metric are time in seconds, expressed | |||

in sufficiently fine resolution to convey meaningful quantitative | in sufficiently fine resolution to convey meaningful quantitative | |||

information. For example, resolution of microseconds is usually | information. For example, resolution of microseconds is usually | |||

sufficient. | sufficient. | |||

4.2.3. Discussion and other details | 4.2.3. Discussion and other details | |||

The Type-P-Finite-One-way-Delay-Mean metric requires the conditional | The Type-P-Finite-One-way-Delay-Mean metric requires the conditional | |||

delay distribution described in section 5.1. | delay distribution described in section 5.1. | |||

4.2.4. Statistic: | 4.2.4. Statistic: | |||

This metric, a mean, does not require additional statistics. | This metric, a mean, does not require additional statistics. | |||

4.2.5. Composition Function: Sum of Means | 4.2.5. Composition Function: Sum of Means | |||

The Type-P-Finite--Composite-One-way-Delay-Mean, or CompMeanDelay, | The Type-P-Finite-Composite-One-way-Delay-Mean, or CompMeanDelay, for | |||

for the complete Source to Destination path can be calculated from | the complete Source to Destination path can be calculated from sum of | |||

sum of the Mean Delays of all its S constituent sub-paths. | the Mean Delays of all its S constituent sub-paths. | |||

Then the | Then the | |||

Type-P-Finite-Composite-One-way-Delay-Mean = | Type-P-Finite-Composite-One-way-Delay-Mean = | |||

S | S | |||

--- | --- | |||

\ | \ | |||

CompMeanDelay = > (MeanDelay [s]) | = CompMeanDelay = > (MeanDelay [s]) | |||

/ | / | |||

--- | --- | |||

s = 1 | s = 1 | |||

where sub-paths s = 1 to S are involved in the complete path. | where sub-paths s = 1 to S are involved in the complete path. | |||

4.2.6. Statement of Conjecture and Assumptions | 4.2.6. Statement of Conjecture and Assumptions | |||

The mean of a sufficiently large stream of packets measured on each | The mean of a sufficiently large stream of packets measured on each | |||

sub-path during the interval [T, Tf] will be representative of the | sub-path during the interval [T, Tf] will be representative of the | |||

ground truth mean of the delay distribution (and the distributions | ground truth mean of the delay distribution (and the distributions | |||

themselves are sufficiently independent), such that the means may be | themselves are sufficiently independent), such that the means may be | |||

added to produce an estimate of the complete path mean delay. | added to produce an estimate of the complete path mean delay. | |||

skipping to change at page 15, line 12 | skipping to change at page 15, line 25 | |||

If a link contributing non-negligible delay is erroneously included | If a link contributing non-negligible delay is erroneously included | |||

or excluded, the composition will be in error. | or excluded, the composition will be in error. | |||

4.2.10. Application of Measurement Methodology | 4.2.10. Application of Measurement Methodology | |||

The requirements of the common section apply here as well. | The requirements of the common section apply here as well. | |||

4.3. Name: Type-P-Finite-Composite-One-way-Delay-Minimum | 4.3. Name: Type-P-Finite-Composite-One-way-Delay-Minimum | |||

This section describes is a statistic based on the Type-P-Finite-One- | This section describes is a statistic based on the Type-P-Finite-One- | |||

way-Delay-Poisson/Periodic-Stream metric, and the composed metric | way-Delay-<Sample>-Stream metric, and the composed metric based on | |||

based on that statistic. | that statistic. | |||

4.3.1. Metric Parameters | 4.3.1. Metric Parameters | |||

See the common parameters section above. | See the common parameters section above. | |||

4.3.2. Definition and Metric Units of the Minimum Statistic | 4.3.2. Definition and Metric Units of the Minimum Statistic | |||

We define | We define | |||

Type-P-Finite-One-way-Delay-Minimum = | Type-P-Finite-One-way-Delay-Minimum = | |||

skipping to change at page 15, line 47 | skipping to change at page 16, line 16 | |||

The Type-P-Finite-One-way-Delay-Minimum metric requires the | The Type-P-Finite-One-way-Delay-Minimum metric requires the | |||

conditional delay distribution described in section 5.1.3. | conditional delay distribution described in section 5.1.3. | |||

4.3.4. Statistic: | 4.3.4. Statistic: | |||

This metric, a minimum, does not require additional statistics. | This metric, a minimum, does not require additional statistics. | |||

4.3.5. Composition Function: Sum of Minima | 4.3.5. Composition Function: Sum of Minima | |||

The Type-P-Finite--Composite-One-way-Delay-Minimum, or CompMinDelay, | The Type-P-Finite-Composite-One-way-Delay-Minimum, or CompMinDelay, | |||

for the complete Source to Destination path can be calculated from | for the complete Source to Destination path can be calculated from | |||

sum of the Minimum Delays of all its S constituent sub-paths. | sum of the Minimum Delays of all its S constituent sub-paths. | |||

Then the | Then the | |||

Type-P-Finite-Composite-One-way-Delay-Minimum = | Type-P-Finite-Composite-One-way-Delay-Minimum = | |||

S | S | |||

--- | --- | |||

\ | \ | |||

CompMinDelay = > (MinDelay [s]) | = CompMinDelay = > (MinDelay [s]) | |||

/ | / | |||

--- | --- | |||

s = 1 | s = 1 | |||

4.3.6. Statement of Conjecture and Assumptions | 4.3.6. Statement of Conjecture and Assumptions | |||

The minimum of a sufficiently large stream of packets measured on | The minimum of a sufficiently large stream of packets measured on | |||

each sub-path during the interval [T, Tf] will be representative of | each sub-path during the interval [T, Tf] will be representative of | |||

the ground truth minimum of the delay distribution (and the | the ground truth minimum of the delay distribution (and the | |||

distributions themselves are sufficiently independent), such that the | distributions themselves are sufficiently independent), such that the | |||

minima may be added to produce an estimate of the complete path | minima may be added to produce an estimate of the complete path | |||

minimum delay. | minimum delay. | |||

skipping to change at page 17, line 22 | skipping to change at page 17, line 38 | |||

We obtain a sequence of pairs with elements as follows: | We obtain a sequence of pairs with elements as follows: | |||

o TstampSrc, as above | o TstampSrc, as above | |||

o L, either zero or one, where L=1 indicates loss and L=0 indicates | o L, either zero or one, where L=1 indicates loss and L=0 indicates | |||

arrival at the destination within TstampSrc + Tmax. | arrival at the destination within TstampSrc + Tmax. | |||

5.1.3. Discussion and other details | 5.1.3. Discussion and other details | |||

None. | ||||

5.1.4. Statistic: Type-P-One-way-Packet-Loss-Empirical-Probability | 5.1.4. Statistic: Type-P-One-way-Packet-Loss-Empirical-Probability | |||

Given the stream parameter M, the number of packets sent, we can | Given the stream parameter M, the number of packets sent, we can | |||

define the Empirical Probability of Loss Statistic (Ep), consistent | define the Empirical Probability of Loss Statistic (Ep), consistent | |||

with Average Loss in [RFC2680], as follows: | with Average Loss in [RFC2680], as follows: | |||

Type-P-One-way-Packet-Loss-Empirical-Probability = | Type-P-One-way-Packet-Loss-Empirical-Probability = | |||

M | M | |||

--- | --- | |||

1 \ | 1 \ | |||

Ep = - * > (L[m]) | = Ep = - * > (L[m]) | |||

M / | M / | |||

--- | --- | |||

m = 1 | m = 1 | |||

where all packets m = 1 through M have a value for L. | where all packets m = 1 through M have a value for L. | |||

5.1.5. Composition Function: Composition of Empirical Probabilities | 5.1.5. Composition Function: Composition of Empirical Probabilities | |||

The Type-P-One-way-Composite-Packet-Loss-Empirical-Probability, or | The Type-P-One-way-Composite-Packet-Loss-Empirical-Probability, or | |||

CompEp for the complete Source to Destination path can be calculated | CompEp for the complete Source to Destination path can be calculated | |||

by combining Ep of all its constituent sub-paths (Ep1, Ep2, Ep3, ... | by combining Ep of all its constituent sub-paths (Ep1, Ep2, Ep3, ... | |||

Epn) as | Epn) as | |||

Type-P-Composite-One-way-Packet-Loss-Empirical-Probability = | Type-P-Composite-One-way-Packet-Loss-Empirical-Probability = | |||

CompEp = 1 - {(1 - Ep1) x (1 - Ep2) x (1 - Ep3) x ... x (1 - EpS)} | = CompEp = 1 - {(1 - Ep1) x (1 - Ep2) x (1 - Ep3) x ... x (1 - EpS)} | |||

If any Eps is undefined in a particular measurement interval, | If any Eps is undefined in a particular measurement interval, | |||

possibly because a measurement system failed to report a value, then | possibly because a measurement system failed to report a value, then | |||

any CompEp that uses sub-path s for that measurement interval is | any CompEp that uses sub-path s for that measurement interval is | |||

undefined. | undefined. | |||

5.1.6. Statement of Conjecture and Assumptions | 5.1.6. Statement of Conjecture and Assumptions | |||

The empirical probability of loss calculated on a sufficiently large | The empirical probability of loss calculated on a sufficiently large | |||

stream of packets measured on each sub-path during the interval [T, | stream of packets measured on each sub-path during the interval [T, | |||

skipping to change at page 18, line 45 | skipping to change at page 19, line 22 | |||

Or, when traffic volumes rise due to the rapid spread of an email- | Or, when traffic volumes rise due to the rapid spread of an email- | |||

borne worm, loss due to queue overflow in one network may help | borne worm, loss due to queue overflow in one network may help | |||

another network to carry its traffic without loss. | another network to carry its traffic without loss. | |||

5.1.10. Application of Measurement Methodology | 5.1.10. Application of Measurement Methodology | |||

See the common section. | See the common section. | |||

6. Delay Variation Metrics and Statistics | 6. Delay Variation Metrics and Statistics | |||

6.1. Name: Type-P-One-way-pdv-refmin-Poisson/Periodic-Stream | 6.1. Name: Type-P-One-way-pdv-refmin-<Sample>-Stream | |||

This packet delay variation (PDV) metric is a necessary element of | This packet delay variation (PDV) metric is a necessary element of | |||

Composed Delay Variation metrics, and its definition does not | Composed Delay Variation metrics, and its definition does not | |||

formally exist elsewhere in IPPM literature. | formally exist elsewhere in IPPM literature (with the exception of | |||

[RFC5481] . | ||||

6.1.1. Metric Parameters: | 6.1.1. Metric Parameters: | |||

In addition to the parameters of section 4.1.1: | In addition to the parameters of section 4.1.1: | |||

o TstampSrc[i], the wire time of packet[i] as measured at MP(Src) | o TstampSrc[i], the wire time of packet[i] as measured at MP(Src) | |||

(measurement point at the source) | (measurement point at the source) | |||

o TstampDst[i], the wire time of packet[i] as measured at MP(Dst), | o TstampDst[i], the wire time of packet[i] as measured at MP(Dst), | |||

assigned to packets that arrive within a "reasonable" time. | assigned to packets that arrive within a "reasonable" time. | |||

skipping to change at page 19, line 39 | skipping to change at page 20, line 15 | |||

o MinDelay, the Type-P-Finite-One-way-Delay value for F(min_delay | o MinDelay, the Type-P-Finite-One-way-Delay value for F(min_delay | |||

packet) given above. | packet) given above. | |||

o N, the number of packets received at the Destination meeting the | o N, the number of packets received at the Destination meeting the | |||

F(current packet) criteria. | F(current packet) criteria. | |||

6.1.2. Definition and Metric Units | 6.1.2. Definition and Metric Units | |||

Using the definition above in section 5.1.2, we obtain the value of | Using the definition above in section 5.1.2, we obtain the value of | |||

Type-P-Finite-One-way-Delay-Poisson/Periodic-Stream[n], the singleton | Type-P-Finite-One-way-Delay-<Sample>-Stream[n], the singleton for | |||

for each packet[i] in the stream (a.k.a. FiniteDelay[i]). | each packet[i] in the stream (a.k.a. FiniteDelay[i]). | |||

For each packet[n] that meets the F(first packet) criteria given | For each packet[n] that meets the F(first packet) criteria given | |||

above: Type-P-One-way-pdv-refmin-Poisson/Periodic-Stream[n] = | above: Type-P-One-way-pdv-refmin-<Sample>-Stream[n] = | |||

PDV[n] = FiniteDelay[n] - MinDelay | PDV[n] = FiniteDelay[n] - MinDelay | |||

where PDV[i] is in units of time in seconds, expressed in | where PDV[i] is in units of time in seconds, expressed in | |||

sufficiently fine resolution to convey meaningful quantitative | sufficiently fine resolution to convey meaningful quantitative | |||

information. For example, resolution of microseconds is usually | information. For example, resolution of microseconds is usually | |||

sufficient. | sufficient. | |||

6.1.3. Discussion and other details | 6.1.3. Discussion and other details | |||

skipping to change at page 21, line 18 | skipping to change at page 21, line 40 | |||

\ / \ | \ / \ | |||

> | PDV[n]- MeanPDV | | > | PDV[n]- MeanPDV | | |||

/ \ / | / \ / | |||

--- | --- | |||

n = 1 | n = 1 | |||

----------------------------------- | ----------------------------------- | |||

/ \ | / \ | |||

| ( 3/2 ) | | | ( 3/2 ) | | |||

\ (N - 1) * VarPDV / | \ (N - 1) * VarPDV / | |||

(see Appendix X of [Y.1541] for additional background information). | ||||

We define the Quantile of the PDVRefMin sample as the value where the | We define the Quantile of the PDVRefMin sample as the value where the | |||

specified fraction of singletons is less than the given value. | specified fraction of singletons is less than the given value. | |||

6.1.5. Composition Functions: | 6.1.5. Composition Functions: | |||

This section gives two alternative composition functions. The | This section gives two alternative composition functions. The | |||

objective is to estimate a quantile of the complete path delay | objective is to estimate a quantile of the complete path delay | |||

variation distribution. The composed quantile will be estimated | variation distribution. The composed quantile will be estimated | |||

using information from the sub-path delay variation distributions. | using information from the sub-path delay variation distributions. | |||

6.1.5.1. Approximate Convolution | 6.1.5.1. Approximate Convolution | |||

The Type-P-Finite-One-way-Delay-Poisson/Periodic-Stream samples from | The Type-P-Finite-One-way-Delay-<Sample>-Stream samples from each | |||

each sub-path are summarized as a histogram with 1 ms bins | sub-path are summarized as a histogram with 1 ms bins representing | |||

representing the one-way delay distribution. | the one-way delay distribution. | |||

From [Stats], the distribution of the sum of independent random | From [Stats], the distribution of the sum of independent random | |||

variables can be derived using the relation: | variables can be derived using the relation: | |||

Type-P-Composite-One-way-pdv-refmin-quantile-a = | Type-P-Composite-One-way-pdv-refmin-quantile-a = | |||

/ / | ||||

. . | ||||

/ / | ||||

P(X + Y + Z <= a) = | | P(X <= a-y-z) * P(Y = y) * P(Z = z) dy dz | P(X + Y + Z <= a) = | | P(X <= a-y-z) * P(Y = y) * P(Z = z) dy dz | |||

/ / | / / | |||

` ` | ||||

z y | z y | |||

Note that dy and dz indicate partial integration above, and that y | ||||

and z are the integration variables. Also, the probablility of an | ||||

outcome is indicated by the symbol P(outcome). | ||||

where X, Y, and Z are random variables representing the delay | where X, Y, and Z are random variables representing the delay | |||

variation distributions of the sub-paths of the complete path (in | variation distributions of the sub-paths of the complete path (in | |||

this case, there are three sub-paths), and a is the quantile of | this case, there are three sub-paths), and a is the quantile of | |||

interest. Note dy and dz indicate partial integration here.This | interest. | |||

relation can be used to compose a quantile of interest for the | ||||

This relation can be used to compose a quantile of interest for the | ||||

complete path from the sub-path delay distributions. The histograms | complete path from the sub-path delay distributions. The histograms | |||

with 1 ms bins are discrete approximations of the delay | with 1 ms bins are discrete approximations of the delay | |||

distributions. | distributions. | |||

6.1.5.2. Normal Power Approximation | 6.1.5.2. Normal Power Approximation | |||

Type-P-One-way-Composite-pdv-refmin-NPA for the complete Source to | Type-P-One-way-Composite-pdv-refmin-NPA for the complete Source to | |||

Destination path can be calculated by combining statistics of all the | Destination path can be calculated by combining statistics of all the | |||

constituent sub-paths in the process described in [Y.1541] clause 8 | constituent sub-paths in the process described in [Y.1541] clause 8 | |||

and Appendix X. | and Appendix X. | |||

skipping to change at page 23, line 29 | skipping to change at page 24, line 10 | |||

should establish bilateral or multi-lateral agreements regarding the | should establish bilateral or multi-lateral agreements regarding the | |||

timing, size, and frequency of collection of sample metrics. Use of | timing, size, and frequency of collection of sample metrics. Use of | |||

this method in excess of the terms agreed between the participants | this method in excess of the terms agreed between the participants | |||

may be cause for immediate rejection or discard of packets or other | may be cause for immediate rejection or discard of packets or other | |||

escalation procedures defined between the affected parties. | escalation procedures defined between the affected parties. | |||

7.2. User Data Confidentiality | 7.2. User Data Confidentiality | |||

Active use of this method generates packets for a sample, rather than | Active use of this method generates packets for a sample, rather than | |||

taking samples based on user data, and does not threaten user data | taking samples based on user data, and does not threaten user data | |||

confidentiality. Passive measurement must restrict attention to the | confidentiality. Passive measurement MUST restrict attention to the | |||

headers of interest. Since user payloads may be temporarily stored | headers of interest. Since user payloads may be temporarily stored | |||

for length analysis, suitable precautions MUST be taken to keep this | for length analysis, suitable precautions MUST be taken to keep this | |||

information safe and confidential. In most cases, a hashing function | information safe and confidential. In most cases, a hashing function | |||

will produce a value suitable for payload comparisons. | will produce a value suitable for payload comparisons. | |||

7.3. Interference with the metrics | 7.3. Interference with the metrics | |||

It may be possible to identify that a certain packet or stream of | It may be possible to identify that a certain packet or stream of | |||

packets is part of a sample. With that knowledge at the destination | packets is part of a sample. With that knowledge at the destination | |||

and/or the intervening networks, it is possible to change the | and/or the intervening networks, it is possible to change the | |||

skipping to change at page 24, line 19 | skipping to change at page 24, line 44 | |||

[RFC4148]. | [RFC4148]. | |||

IANA is asked to register the following metrics in the IANA-IPPM- | IANA is asked to register the following metrics in the IANA-IPPM- | |||

METRICS-REGISTRY-MIB: | METRICS-REGISTRY-MIB: | |||

ietfFiniteOneWayDelayStream OBJECT-IDENTITY | ietfFiniteOneWayDelayStream OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-Finite-One-way-Delay-Stream" | "Type-P-Finite-One-way-Delay-Stream" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 5.1." | "Reference "RFCyyyy, section 4.1." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfFiniteOneWayDelayMean OBJECT-IDENTITY | ietfFiniteOneWayDelayMean OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-Finite-One-way-Delay-Mean" | "Type-P-Finite-One-way-Delay-Mean" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 5.2." | "Reference "RFCyyyy, section 4.2." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfCompositeOneWayDelayMean OBJECT-IDENTITY | ietfCompositeOneWayDelayMean OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-Finite-Composite-One-way-Delay-Mean" | "Type-P-Finite-Composite-One-way-Delay-Mean" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 5.2.5." | "Reference "RFCyyyy, section 4.2.5." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfFiniteOneWayDelayMinimum OBJECT-IDENTITY | ietfFiniteOneWayDelayMinimum OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-Finite-One-way-Delay-Minimum" | "Type-P-Finite-One-way-Delay-Minimum" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 5.3.2." | "Reference "RFCyyyy, section 4.3.2." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfCompositeOneWayDelayMinimum OBJECT-IDENTITY | ietfCompositeOneWayDelayMinimum OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-Finite-Composite-One-way-Delay-Minimum" | "Type-P-Finite-Composite-One-way-Delay-Minimum" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 5.3.5." | "Reference "RFCyyyy, section 4.3." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfOneWayPktLossEmpiricProb OBJECT-IDENTITY | ietfOneWayPktLossEmpiricProb OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-One-way-Packet-Loss-Empirical-Probability" | "Type-P-One-way-Packet-Loss-Empirical-Probability" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 6.1.4." | "Reference "RFCyyyy, section 5.1.4" | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfCompositeOneWayPktLossEmpiricProb OBJECT-IDENTITY | ietfCompositeOneWayPktLossEmpiricProb OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-Composite-One-way-Packet-Loss-Empirical-Probability" | "Type-P-Composite-One-way-Packet-Loss-Empirical-Probability" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 6.1.5." | "Reference "RFCyyyy, section 5.1." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfOneWayPdvRefminStream OBJECT-IDENTITY | ietfOneWayPdvRefminStream OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-One-way-pdv-refmin-Stream" | "Type-P-One-way-pdv-refmin-Stream" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 7.1." | "Reference "RFCyyyy, section 6.1." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfOneWayPdvRefminMean OBJECT-IDENTITY | ietfOneWayPdvRefminMean OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-One-way-pdv-refmin-Mean" | "Type-P-One-way-pdv-refmin-Mean" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 7.1.4." | "Reference "RFCyyyy, section 6.1.4." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfOneWayPdvRefminVariance OBJECT-IDENTITY | ietfOneWayPdvRefminVariance OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-One-way-pdv-refmin-Variance" | "Type-P-One-way-pdv-refmin-Variance" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 7.1.4." | "Reference "RFCyyyy, section 6.1.4." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfOneWayPdvRefminSkewness OBJECT-IDENTITY | ietfOneWayPdvRefminSkewness OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-One-way-pdv-refmin-Skewness" | "Type-P-One-way-pdv-refmin-Skewness" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 7.1.4." | "Reference "RFCyyyy, section 6.1.4." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfCompositeOneWayPdvRefminQtil OBJECT-IDENTITY | ietfCompositeOneWayPdvRefminQtil OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-Composite-One-way-pdv-refmin-quantile-a" | "Type-P-Composite-One-way-pdv-refmin-quantile-a" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 7.1.5.1." | "Reference "RFCyyyy, section 6.1.5.1." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

ietfCompositeOneWayPdvRefminNPA OBJECT-IDENTITY | ietfCompositeOneWayPdvRefminNPA OBJECT-IDENTITY | |||

STATUS current | STATUS current | |||

DESCRIPTION | DESCRIPTION | |||

"Type-P-One-way-Composite-pdv-refmin-NPA" | "Type-P-One-way-Composite-pdv-refmin-NPA" | |||

REFERENCE | REFERENCE | |||

"Reference "RFCyyyy, section 7.1.5.2." | "Reference "RFCyyyy, section 6.1.5.2." | |||

-- RFC Ed.: replace yyyy with actual RFC number & remove this | -- RFC Ed.: replace yyyy with actual RFC number & remove this | |||

note | note | |||

::= { ianaIppmMetrics nn } -- IANA assigns nn | ::= { ianaIppmMetrics nn } -- IANA assigns nn | |||

9. Contributors and Acknowledgements | 9. Contributors and Acknowledgements | |||

The following people have contributed useful ideas, suggestions, or | The following people have contributed useful ideas, suggestions, or | |||

the text of sections that have been incorporated into this memo: | the text of sections that have been incorporated into this memo: | |||

- Phil Chimento <vze275m9@verizon.net> | - Phil Chimento <vze275m9@verizon.net> | |||

skipping to change at page 28, line 35 | skipping to change at page 29, line 14 | |||

[RFC5835] Morton, A. and S. Van den Berghe, "Framework for Metric | [RFC5835] Morton, A. and S. Van den Berghe, "Framework for Metric | |||

Composition", RFC 5835, April 2010. | Composition", RFC 5835, April 2010. | |||

10.2. Informative References | 10.2. Informative References | |||

[RFC5474] Duffield, N., Chiou, D., Claise, B., Greenberg, A., | [RFC5474] Duffield, N., Chiou, D., Claise, B., Greenberg, A., | |||

Grossglauser, M., and J. Rexford, "A Framework for Packet | Grossglauser, M., and J. Rexford, "A Framework for Packet | |||

Selection and Reporting", RFC 5474, March 2009. | Selection and Reporting", RFC 5474, March 2009. | |||

[RFC5644] Stephan, E., Liang, L., and A. Morton, "IP Performance | [RFC5481] Morton, A. and B. Claise, "Packet Delay Variation | |||

Metrics (IPPM): Spatial and Multicast", RFC 5644, | Applicability Statement", RFC 5481, March 2009. | |||

October 2009. | ||||

[Stats] McGraw-Hill NY NY, "Introduction to the Theory of | [Stats] McGraw-Hill NY NY, "Introduction to the Theory of | |||

Statistics, 3rd Edition,", 1974. | Statistics, 3rd Edition,", 1974. | |||

[Y.1540] ITU-T Recommendation Y.1540, "Internet protocol data | [Y.1540] ITU-T Recommendation Y.1540, "Internet protocol data | |||

communication service - IP packet transfer and | communication service - IP packet transfer and | |||

availability performance parameters", November 2007. | availability performance parameters", November 2007. | |||

[Y.1541] ITU-T Recommendation Y.1541, "Network Performance | [Y.1541] ITU-T Recommendation Y.1541, "Network Performance | |||

Objectives for IP-based Services", February 2006. | Objectives for IP-based Services", February 2006. | |||

End of changes. 58 change blocks. | ||||

105 lines changed or deleted | | 130 lines changed or added | ||

This html diff was produced by rfcdiff 1.38. The latest version is available from http://tools.ietf.org/tools/rfcdiff/ |