Intelligent channel access technique in Cognitive Radio networks

Future networks, especially in the framework of smart cities will be populated with various kinds of equipment accessing wireless communication channels. A much higher device variety will arise, ranging from identifiable objects to notebooks and smart phones. These aspects require high-level intelligent wireless access network. In order to cope with the vast number of technologies (machine-to-machine communications and sensor networks), cognitive radio network will be a key enabling technology. Cognitive Radio (CR) significantly utilizes current static radio frequency bands in an opportunistic manner. In this paper, we propose two intelligent channel access methods; Minimum Collision Technique (MCT) and Maximum Residual Lifetime Technique (MRLT) in CR networks. The proposed techniques are evaluated by average channel utilization and average channel collision on four dedicated channels in a specific period of time (3000ms). The numerical results confirm that the MRLT technique on cognitive radio side approaches more channel utilization and less data transmission collision among users, compared with MCT.