Abstract:

The multicast information is usually transmitted through multiple intermediate nodes to reach the final destination node in multihop cognitive radio networks. There exist a lot of multicast routing protocols, while these based on traditional wireless networks are not suitable for cognitive radio networks. The question to be solved is in this paper: in multihop wireless networks, given a multicast routing with QoS requirements, how to create a multicast routing path and schedule node transmission so as to achieve the least bandwidth consumption in the transmission process. In this paper, a distributed multicast routing protocol is proposed to resolve the issue, It not only completes the establishment of the routing process, but also conquers the reasonable scheduling of nodes in the routing transfer process. Experimental results show that the transmission scheduling policy can effectively reduce network bandwidth consumption, and increase the success rate of the response of the multicast request.

Key words: cognitive radio;multicast routing;quality of service;transmission scheduling