A multi-threshold wavelength allocation scheme for fairness management in WDM ring networks

We investigate a threshold-based wavelength allocation scheme in order to support fairness and service differentiation in WDM unidirectional ring networks. In a ring network, classes of calls with smaller hop-counts (i.e., the number of hops used from source to destination), experience lower blocking rates than ones with greater hop-counts. In this paper, a multi-threshold (MT) wavelength allocation scheme is proposed to provide equal blocking probabilities experienced by different classes. Simulation results compare the performance of our proposed scheme, with that of complete sharing and complete partitioning schemes.