Cost and performance trade-offs in reconfiguration strategies for WDM networks

In this paper we study the problem of receiver allocation in WDM single-hop optical networks under dynamically changing traffic. Instead of focusing only on performance optimization, we wish to take into account both network performance and reconfiguration cost reduction. We first formalize the receiver allocation problem as a multi-criteria ILP. Then, we define Pareto-optimal solutions to solve the problem. The number and characteristics of Pareto-optimal solutions is studied to assess the problem significance. Finally, we propose different reconfiguration schemes that may guide the choice of network administrators among efficient solutions for the re-allocation problem.