CoS Assignment Based on Physical Performance Parameters in OBS Networks

In this paper an analytical model that calculates the blocking probability of an all-optical wavelength routed optical burst switched network was developed. This study takes into consideration the physical performance of the network in terms of noise and has shown that the performance of the network degrades severely when the physical impairments are taken into consideration. In addition, the noise performance of the network has been used as a parameter to differentiate classes of services (CoS) for the traffic supported by the network. The outcome of this work has shown that taking into consideration the physical performance parameters of the network not only provides CoS differentiation but also assists in noticeably decreasing the blocking probabilities of the individual classes of services compared to that when no CoS assignment is applied