Virtual network embedding in flexi-grid optical networks

Abstract

Network virtualization technology makes multiple virtual networks (VNs) that provide heterogeneous services share the same substrate network. Virtual network embedding (VNE) maps VNs to the substrate network, and allocates network resources. In this paper, we provide VNE algorithms for efficient management of flexi-grid networks, where virtual link mapping in flexi-grid networks satisfies continuity and contiguity constraints of the spectrum assignment. We provide a column generation algorithm for the VNE problem. Numerical results show the functionality and the efficiency of the algorithm.