IP Packet Delay Variation Metric for IP Performance Metrics (IPPM)
RFC 3393
Document | Type |
RFC - Proposed Standard
(November 2002; No errata)
Was draft-ietf-ippm-ipdv (ippm WG)
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Authors | Carlo Demichelis , Philip Chimento | ||
Last updated | 2012-02-26 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 3393 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Allison Mankin | ||
IESG note |
Approved 2002-08-08, and now heading for RFC Ed Queue [note from Allison] Responsible: RFC Editor |
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Send notices to | <kaeo@merike.com>, <matt@internet2.edu> |
Network Working Group C. Demichelis Request for Comments: 3393 Telecomitalia Lab Category: Standards Track P. Chimento Ericsson IPI November 2002 IP Packet Delay Variation Metric for IP Performance Metrics (IPPM) Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2002). All Rights Reserved. Abstract This document refers to a metric for variation in delay of packets across Internet paths. The metric is based on the difference in the One-Way-Delay of selected packets. This difference in delay is called "IP Packet Delay Variation (ipdv)". The metric is valid for measurements between two hosts both in the case that they have synchronized clocks and in the case that they are not synchronized. We discuss both in this document. Table of Contents 1 Introduction..................................................... 2 1.1 Terminology.................................................. 3 1.2 Definition................................................... 3 1.3 Motivation................................................... 4 1.4 General Issues Regarding Time................................ 5 2 A singleton definition of a One-way-ipdv metric.................. 5 2.1 Metric name.................................................. 6 2.2 Metric parameters............................................ 6 2.3 Metric unit.................................................. 6 2.4 Definition................................................... 6 2.5 Discussion................................................... 7 2.6 Methodologies................................................ 9 2.7 Errors and Uncertainties.....................................10 Demichelis & Chimento Standards Track [Page 1] RFC 3393 IP Packet Delay Variation November 2002 2.7.1 Errors/Uncertainties related to Clocks.................11 2.7.2 Errors/uncertainties related to Wire-time vs Host-time.12 3 Definitions for Samples of One-way-ipdv..........................12 3.1 Metric name..................................................12 3.2 Parameters...................................................12 3.3 Metric Units.................................................13 3.4 Definition...................................................13 3.5 Discussion...................................................13 3.6 Methodology..................................................14 3.7 Errors and uncertainties.....................................14 4 Statistics for One-way-ipdv......................................14 4.1 Lost Packets and ipdv statistics.............................15 4.2 Distribution of One-way-ipdv values..........................15 4.3 Type-P-One-way-ipdv-percentile...............................16 4.4 Type-P-One-way-ipdv-inverse-percentile.......................16 4.5 Type-P-One-way-ipdv-jitter...................................16 4.6 Type-P-One-way-peak-to-peak-ipdv.............................16 5 Discussion of clock synchronization..............................17 5.1 Effects of synchronization errors............................17 5.2 Estimating the skew of unsynchronized clocks.................18 6 Security Considerations..........................................18 6.1 Denial of service............................................18 6.2 Privacy/Confidentiality......................................18 6.3 Integrity....................................................19 7 Acknowledgments..................................................19 8 References.......................................................19 8.1 Normative References........................................19 8.2 Informational References....................................19 9 Authors' Addresses...............................................20 10 Full Copyright Statement........................................21 1. Introduction This memo defines a metric for the variation in delay of packets that flow from one host to another through an IP path. It is based on "A One-Way-Delay metric for IPPM", RFC 2679 [2] and part of the text in this memo is taken directly from that document; the reader is assumedShow full document text