Survivable green IP over WDM networks against double-link failures

In this paper, we study the energy efficient problem of survivable IP over WDM networks. A novel “virtual link” energy model is presented. The energy model is abstracted from the power consumption value of commercial network devices. Based on the new two-layer energy-aware auxiliary graph, we propose the Energy-Efficient and Survivable Routing (E2SR) algorithm for IP over WDM networks against double-link failures. In contrast to prior green networking algorithms, the novelty of our proposed routing algorithm is mainly twofold: first, the energy-efficient virtual topology iterative mapping method; second, the energy-efficient spare resource sharing method. From the numerical results for two typical carrier networks, our proposed E2SR algorithm achieves obvious energy consumption reduction for IP over WDM networks when guaranteeing traffic survivability against double-link failures.