Scheme to measure One-Way Delay Variation with detection and removal of clock skew

Makoto Aoki, Eiji Oki, Roberto Rojas-Cessa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

One-Way Delay Variation (OWDV ) has become increasingly of interest to evaluate network state and service quality, especially for real-time and streaming services such as VoIP and video. Measurement of these parameters needs to be performed with the layout infrastructure. Many schemes for OWD measurements require clock synchronization at the source and destination through Global-Positioning System (GPS) or the Network Time Protocol (NTP). In clock-synchronized approaches, the accuracy of the measurement of OWDV depends on the achieved accuracy of clock synchronization. GPS provides high-accuracy clock synchronization. However, the deployment of GPS on legacy network equipment might be slow and costly. This paper proposes a method for measuring OWDV without recurring to clock synchronization. However, clock skew may affect the measurement of OWDV. The proposed approach is based on the measurement of Inter-Packet Delay (IPD) and Accumulated OWDV (AOWDV). This paper shows the performance of the proposed scheme via simulation and through experimentation in a VoIP network. The presented simulation and experimental results indicate that clock skew can be efficiently measured and removed and that OWDV can be measured without requiring clock synchronization.

Original languageEnglish (US)
Title of host publication2010 International Conference on High Performance Switching and Routing, HPSR 2010
Pages159-164
Number of pages6
DOIs
StatePublished - 2010
Externally publishedYes
Event2010 International Conference on High Performance Switching and Routing, HPSR 2010 - Richardson, TX, United States
Duration: Jun 13 2010Jun 16 2010

Publication series

Name2010 International Conference on High Performance Switching and Routing, HPSR 2010

Other

Other2010 International Conference on High Performance Switching and Routing, HPSR 2010
CountryUnited States
CityRichardson, TX
Period6/13/106/16/10

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture

Keywords

  • Clock rate adjustment
  • Clock skew
  • Delay measurement
  • Inter-packet delay
  • One-Way Delay

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