A CRAHNs routing protocol based on the hops, channel number and channel capacity.

In traditional Ad hoc multi-hop network, spectrum resource always been pre-assigned to the primary users. As the assignment is static, it will be wasted when the primary users have no data to transmit. So we propose a new routing metric and corresponding routing protocol which can make an effective use of spectrum resource by the cognitive users without interference with the primary users. Our protocol can also create an end-to-end link quickly from the source node to the destination node with premise channel quality. The simulation results show that, comparing with the traditional DSR routing protocol, the routing algorithm proposed in this paper has a better performance in terms of forming a complete end-to-end link routing duration, channel capacity and transmission delay