Opportunistic Spectrum Access Based on Sequential Channel-Sensing in Decentralized CRN

Opportunistic spectrum access is an important issue in cognitive radio systems. In this paper, we propose a distributed opportunistic spectrum access scheme based on sequential channel-sensing in decentralized CRN (cognitive radio network). Different from the traditional spectrum sensing scheme, the scheme proposed allows a secondary users to sense many channels one by one sequentially in a slot. Simulation results show that the proposed scheme can attain better performance of throughput. At the same time, we analyze three sequential channel-sensing orders of the proposed scheme. The simulation results show that the learning based channel-sensing order is better in the performance of throughput.