Power efficient integrated routing with reliability constraints in IP over WDM networks

The increasing trend of the power consumption of the Internet has attracted much attention of researchers from both academic and industrial communities. In this paper, we present a power efficient integrated routing algorithm for dynamic sub-lambda connections with reliability constraints in IP over WDM networks. Integrated routing which considers the IP layer as well as the optical layer together leads to better network resource utilization. An auxiliary graph is constructed by assigning the power consumption value as the weight of a link so as to capture the power consumption of a route. The algorithm tries to find a minimum power consumption path for a connection while satisfying the reliability requirements. Simulation results show the effectiveness of the algorithm in terms of power efficiency, blocking probability, and the average number of physical and virtual hops per connection goes through.