An Improved Dynamic Spectrum Access Protocol Based on the Greedy Algorithm

In cognitive radio networks, media access control protocol decides the method how the nodes in the networks receive and send data by shared wireless channels. Whether the MAC protocol can use the limited channel effectively plays a very important role in the performance of the cognitive radio network. Focusing on designing and implementation an excellent MAC protocol in cognitive radio networks, this paper describes an improved dynamic spectrum access protocol based on the greedy algorithm. The simulation results shows it´s good performance.