PLI-Aware Dynamic Routing in Software Defined Elastic Optical Networks (SD-EONs)

The ever increasing demand on the Internet leads to a growing desire for reliable connections more than ever. To this end, software-defined elastic optical networks need a comprehensive resource allocation method in their controllers that should be aware of load and physical layer impairments (PLIs). This paper proposes the PLI-Aware (PLIA) routing algorithm, which dynamically calculates all links’ costs according to network states and PLIs. This algorithm reduces the request blocking probability due to awareness of congestion and lack of transmission quality.