Multi-domain Awareness Energy-efficient Routing Algorithm for Elastic Optical Networks

A Multi-Domain Awareness Routing algorithm is proposed to reduce the energy consumption in elastic optical networks. By adopting the fragmentation metrics both of the spectrum domain and spatial domain, the blocking probability of elastic optical networks can be reduced. When new services arrive, they are prioritized to work on existing links to reduce new optical paths and working network components. Then the holding time of existing services is fully considered in order to select the candidate route with a shorter working time and thus improve energy consumption. The simulation results show that the proposed algorithm can effectively reduce the network energy consumption and hence, result in overall lower connection blocking probability.