Guest editorial: Special issue on cognitive radio oriented wireless networks and communications

A special issue on cognitive radio oriented wireless networks and communications is discussed in Mobile Network Application journal. The paper on 'Distributed Scheduling and Resource Allocation for Cognitive OFDMA Radios' by Bazerque and Giannakis considers scheduling spectrum access and allocating power and rate resources in CR networks. Xin, Ma, and Shen investigate channel assignment for CR wireless networks in their paper entitled 'A Path-centric Channel Assignment Framework for Cognitive Radio Wireless Networks.' The final paper in this issue, by Miljanic and colleagues, presents an experimental CR hardware platform. The paper entitle 'The WINLAB Network Centric Cognitive Radio Hardware Platform - WiNC2R.' describes the architecture and hardware implementation of a network- centric experimental CR prototype platform under development at WINLAB.