Survivable virtual topology design in multi-domain optical networks

We consider the problem of survivable virtual network mapping in a multi-domain optical network with the objective of minimizing total network link cost for a given virtual traffic demand. The survivability constraint guarantees the connectivity of virtual nodes after any single optical link failure. We propose a hierarchical software-defined networking-based control plane to exchange information between domains, and we propose heuristic approaches for mapping virtual links onto multi-domain optical links using partition and contraction mechanisms on the virtual topology. We provide an integer linear programming formulation to compare with our heuristic approaches. Numerical results show that our heuristic approach is effective in reducing total network cost and increasing the successful mapping rate.