Improving Energy Efficiency in Optical Cloud Networks by Exploiting Anycast Routing
Exploiting anycast routing significantly reduces optical network and server energy usage. In this paper, the authors present a case study showing that intelligently selecting destinations and routes thereto, while switching off unused (network) elements, cuts power consumption by around 20% and saves network resources by 29%. Motivated by the fact that ICT accounts for 2-10% of worldwide power consumption and predictions that this will continue to increase, recently many works have investigated possible power saving mechanisms. In this paper, they focus on optical network infrastructure, which globally represents around 0.1 GW of power, mainly stemming from routers. The scenario studied in this paper mainly addresses optical backbone networks.