Measurement scheme for one-way delay variation with detection and removal of clock skew

Document Type

Article

Publication Date

12-1-2010

Abstract

One-way delay variation (OWDV) has become increasingly of interest to researchers as a way to evaluate network state and service quality, especially for real-time and streaming services such as voice-over-Internet-protocol (VoIP) and video. Many schemes for OWDV measurement require clock synchronization through the global-positioning system (GPS) or network time protocol. In clocksynchronized approaches, the accuracy of OWDV measurement depends on the accuracy of the clock synchronization. GPS provides highly accurate clock synchronization. However, the deployment of GPS on legacy network equipment might be slow and costly. This paper proposes a method for measuring OWDV that dispenses with clock synchronization. The clock synchronization problem is mainly caused by clock skew. The proposed approach is based on the measurement of inter-packet delay and accumulated OWDV. This paper shows the performance of the proposed scheme via simulations and through experiments in a VoIP network. The presented simulation and measurement results indicate that clock skew can be efficiently measured and removed and that OWDV can be measured without requiring clock synchronization. © 2010 ETRI.

Identifier

78649809708 (Scopus)

Publication Title

ETRI Journal

External Full Text Location

https://doi.org/10.4218/etrij.10.0109.0611

ISSN

12256463

First Page

854

Last Page

862

Issue

6

Volume

32

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