A Mathematical Framework for the Performance Evaluation of an All-Optical Packet Switch with QoS Differentiation

In this paper we propose a mathematical framework for the performance evaluation of an all-optical packet switch, in terms of packet blocking probability. We provide the analytical models for several QoS differentiation schemes, including wavelength conversion, packet dropping, pre-emptive dropping, fiber delay lines, and wavelength reservation. We demonstrate the accuracy of the proposed models by comparing the analytical results with that of simulation; the results are found to be quite satisfactory. Keywords-optical packet switching; wavelength division multiplexing; packet blocking probability; markov chains; quality of service.

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