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1 Journal of Telecommunications and Information Technology

1 2004

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Methods for evaluation packet delay distribution of flows using Expedited Forwarding PHB

Kaczmarek S., Narloch M.

Journal of Telecommunications and Information Technology

2004

nr 2

29-37

The paper regards problem of providing statistical performance guarantees for real-time flows using Expedited Forwarding Per Hop Behavior (EF PHB) in IP Differentiated Services networks. Statistical approach to EF flows performance guarantees, based on calculation of probability that end-to-end packet delay is larger than certain value, allows larger network utilization than previously proposed deterministic approach. In the paper different methods of packet delay distribution evaluation are presented and compared. Considered cases comprise evaluation of delay distribution models for the core network and evaluation of end-to-end packet delay in the network consisted of edge node and chain of core nodes. Results obtained with aid of analytical models are compared with simulation results.