Oppertnuistic channel selection in herterogeneous cognitive radio network using priority queue scheduling

The Cognitive Radio (CR) is an emerging technology for modern wireless communication system that offers a great solution to scarcity of radio spectrum. The Cognitive Radio Network (CRN) is an intelligent wireless communication organization that is aware of its environment. Here, heterogeneous nodes meet spectrum sensing challenges due to the variation of transmission power, spectrum allocation and sensing bandwidth of the channel. The two main tasks in CRN are primary channel sensing and selection of appropriate unused channel for communication by secondary users. In this paper we present an idea to formulate a contention based channel selection algorithm using priority queue scheduling algorithm. In CRN secondary users play the important role of channel selection. This algorithm will avoid collision during data transmission between heterogeneous nodes and improve the entire network throughput. The proposed algorithm provides 26% more efficient using NS-2 simulation.