Opportunistic Spectrum Sharing Based Resource Allocation for Wireless Virtualization

Abstract

Wireless virtualization has been proposed as a promising way to overcome the current plight of the wireless network, i.e. spectrum crisis, by enabling multiple concurrent wireless virtual networks running on shared wireless substrate resource. However, making efficient use of the underlying spectrum requires effectively assigning the physical spectrum resources to several virtual networks. Since opportunistic spectrum sharing makes wireless communication more intelligent and efficient, we present an opportunistic spectrum sharing based resource allocation scheme for wireless virtualization. First, we formulate the resource allocation problem as an NP-Hard integer program through employing opportunistic spectrum sharing. Then, we propose a dynamic programming algorithm and a heuristic algorithm to solve it. Simulation results confirm the advantage of our algorithms and show that opportunistic spectrum sharing significantly improves the revenue, resource utilization and accept rate while decreasing the payments of virtual networks.