Channel-Based RSA Approaches for QoS Protection of Slices Over Elastic Optical Networks

Resource efficiency and survivability are critical concerns in elastic optical networks (EONs) with virtualization. In this paper, we investigate some important aspects network design against single-link failure under dedicated protection bandwidth squeezing schemes when multiple virtual topologies employed. We propose a link-path integer linear programming (ILP) formulation to solve the joint virtualization problem for large instances, derive different types of each topology considering channel-based spectrum approach allocation. Besides, heuristic find pair predefined paths ILP aiming minimize link load. The proposed provide effective solutions resource savings cooperative modern survivable virtualized EONs taking advantages model.