QoS capacity of virtual wireless networks

The allocation of wireless resources to many different services and service providers has resulted in a heavily fractured spectrum and inefficient use. However, new dynamic spectrum capabilities allow the recapture of this wastage. This work describes the creation of a virtual wireless network (VWN). Taking an approach based on cognitive radio techniques, the VWN allows new network services to be deployed utilizing only residual resources, while preserving the service to primary users. A Markov chain-based analysis is performed, and is used along with discrete event simulations to demonstrate the VWN as a management tool for supporting new services within the existing system. 2011 Elsevier B.V. All rights reserved.