Dealing with Packet Delay Variation in IEEE 1588 Synchronization Using a Sample-Mode Filter

The authors characterize the delay profile of an Ethernet cross-traffic network statically loaded with one of the ITU-T network models in this paper, as well as a larger Ethernet inline traffic loaded with uniformlysized packets, showing how the average time interval between consecutive minimum-delayed packets increases with increased network load. Three existing skew-estimation algorithms are compared by the authors and it is shown that the best performance is achieved by solving a linear programming problem on "de-noised" delay samples. The basis of a new sample-mode algorithm for packet delay variation filtering is formed by this skew-estimation method. Numerical simulations are used by the authors in OPNET to illustrate the performance of the sample-mode filter in the networks. The performance of the proposed PDV filter is compared by the authors with those of the existing sample minimum, mean, and maximum filters, and it is observed that, at different levels of network load, the sample-mode filtering algorithm is able to match or outperform other types of filters.


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  • Accession Number: 01498804
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 5 2013 11:50AM