RFC 3393 (rfc3393) - Page 2 of 21

IP Packet Delay Variation Metric for IP Performance Metrics (IPPM)

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 assumed
   to be familiar with that document.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY" and "OPTIONAL" in this
   document are to be interpreted as described in BCP 14, RFC 2119 [3].
   Although BCP 14, RFC 2119 was written with protocols in mind, the key
   words are used in this document for similar reasons.  They are used
   to ensure the results of measurements from two different
   implementations are comparable and to note instances where an
   implementation could perturb the network.




Demichelis & Chimento       Standards Track