Channel-based RSA approach for virtualization and QoS-aware protection in optical networks

Survivability is an important component in the requirements in elastic optical networks (EONs) with virtualization. In this paper, we examine the significance of network survivability design against single-link failure under dedicated protection and bandwidth squeezing schemes under multiple virtual topologies. We proposed an integer linear programming (ILP) formulation and a genetic algorithm (GA) to derive some different types of protection for each virtual topology considering routing and a channel-based spectrum approach. The proposed ILP and GA provide efficient survivability results and resource savings (in terms of spectrum) for a full design of modern virtualized EONs with different kinds of mechanisms for protection.