Slicing and QoS-aware Resilience in Multipath Routing Problem of Elastic Optical Networks

Survivability is an important component in the requirements in elastic optical networks (EONs) and with virtualization it becomes even more important. In this paper, we examine the significance of network survivability design against a single-link failure using bandwidth squeezing schemes under multiple virtual topologies (or multiple slices). We propose a mixed integer linear programming (MILP) formulation to derive some different types of squeezing for each virtual topology considering a multipath routing on EONs. The proposed MILP provides efficient survivability results and resource savings (in terms of spectrum) for a full design of modern virtualized EONs.