Resource Allocation with Spectrum Aggregation for Wireless Virtual Network Embedding

Wireless network virtualization is a promising solution to enable sharing of spectrum resources for future explosive demands in wireless communications. In this paper, we consider a resource allocation problem for an infrastructure provider (InP) to efficiently embed wireless virtual networks that are requested from multiple virtual network operators, who share the same physical substrate owned by the InP. Different from previous works, we consider the possibility of partially available spectrum band and the capability of spectrum aggregation (SA). The resource allocation problem is formulated as an integer optimization problem, and a heuristic algorithm based on the Bottom-Left (BL) algorithm is proposed to tackle the problem. We show that the resource utilization is increased with spectrum aggregation and the superior performance of our proposed algorithm.