Revenue Optimization and Protection with Network Slicing over a Physical Optical Substrate

Network protection is a key solution and an important component in the requirements of virtualization over elastic optical networks (EONs). In this paper, we examine the significance of network virtualization with survivability design against single-link failures and shared risk link groups (SRLG) under dedicated protection and bandwidth squeezing schemes. We study an optimization version of the routing, modulation and spectrum allocation (RMSA) problem with the goal of maximizing the revenue from the accommodated requests of the virtual optical networks (VONs) or slices. We present a Mixed Integer Linear Programming (MILP) formulation for the problem and evaluate some numerical results. We suggest a heuristic that utilizes techniques of decomposition of the problem, which can be employed to obtain a near optimal solution that has a per instance guarantee on the closeness to the optimal solution.