Algorithm for energy efficient lightpath establishment in WDM networks

The problem of lightpath provisioning in WDM optical networks has been extensively studied to reduce cost and blocking, but there is still a need of investigating this problem from a power consumption perspective. In this paper, we introduce a novel algorithm for IP/MPLS over WDM networks based on a reduced auxiliary graph that limits the solution space and captures the power consumption of lightpath provisioning. Results derived via simulation demonstrate that our strategy is energy efficient and that it is able to produce acceptable blocking ratio which are close to values produced by algorithms oriented to the reduction of blocking.