Abstract: In multi-channel wireless mesh network, there is tight inter-dependence between route selection and availability of spectrum, so selection of channel is required to be fully considered when designing routing protocol. Traditional routing protocol can't be well applied to cognitive radio network. The proposed routing protocol, in which each node is equipped with dual network interface, achieves routing selection and channel selection simultaneously, and takes advantage of multiple channels with collision avoidance design. Simulation shows that the proposed protocol, compared to traditional routing protocol,can significantly improve throughput of the network.

Key words: Cognitive radio, Multi-channel wireless mesh networks, Routing protocol, Collision avoidance