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A mathematical model is introduced for performance evaluation of an OBS core node employing either no or full wavelength conversion strategies. Furthermore, the model assumes Long-Range Dependent (LRD) traffic arrivals to the OBS intermediate node which are accurately modeled by Pareto distribution. In the authors' proposed model, each output port is imitated by a GI/M/w/w queue for which a single performance measure; namely the burst loss probability, is evaluated from the model equations. Also, results of this model are compared with those obtained while assuming Short-Range Dependent (SRD) Poisson arrivals to the core node in the two cases of no and full wavelength conversion.
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