A Transceiver Saving Auxiliary Graph Model for Dynamic Traffic Grooming in WDM Mesh Networks

This paper addresses the dynamic traffic grooming problem in wavelength-division-multiplexed (WDM) mesh optical networks subject to wavelength constraint and transceiver constraint. As an improvement over the existing link bundled auxiliary graph (LBAG) model which thinks all traffic streams must go though the grooming fabric before entering the wavelength switch fabric, we introduce a transceiver saving auxiliary graph (TSAG) model and propose the TSAG method. In the TSAG model, we can determine whether a traffic stream should consume grooming ports or not. Various grooming policies are achieved by assigning the weight value of different edges in the auxiliary graph and their blocking performance are compared through simulations. Results show that the TSAG model has a lower blocking probability than LBAG while consuming the less running time, and TSAG can reduce the number of transceivers utilized while improving the wavelength utilization.