EWA - an adaptive algorithm using watermarks for energy saving in IP-over-WDM networks

We propose an adaptive algorithm, the Energy Watermark Algorithm (EWA), to reduce the power consumption of Internet Protocol (IP)-over-Wavelength Division Multiplexing (WDM) networks. After presenting a network model and a detailed description of the EWA, we perform a sensitivity analysis and evaluate the performance of the algorithm considering real network scenarios. We show that the EWA can effectively switch off network devices, while limiting the costs of reconfiguration in the network.