Performance Evaluation of Optical Burst Switching Networks

Abstract

In this project, several models are used for evaluating and optimizing the performance of optical burst switching (OBS) systems. Within various policies, we mainly focus on the strict priority policies and analyse the effects on the blocking probability. First, we discuss and optimize the burst assembly in the framework. Second, we introduce an approximation model to evaluate blocking probabilities in a single-link network and then extend to a complex network, e.g. NSFNET backbone network. As we obtain analytical results using Erlang Fixed Point Approximation and it might perform badly in some situations, we provide simulation results as well as numerical results to validate the approximation model and demonstrate remarkable effects on blocking probability.