Identification of selfish attack in cognitive radio ad-hoc networks

Cognitive radio is the one of the technique which used to solve the problems of spectrum inefficiency and limited spectrum availability in wireless networks. However, while designing the availability and efficiency of spectrum in wireless network the security in cognitive radio is one of the key challenge. The selfish attack is one of major security issue found in cognitive radio. The selfish attack can be describe, where the selfish node tries to occupy maximum available channels in the network without interfering with the existing channels. Due to this, the overall performance of the network degrades which effects the quality of service (QoS) of the network. However, in order to improve the performance of the networks we have identified the Selfish Attack in cognitive radio by using channel pre occupation scheme with the help of Cooperative Neighboring Cognitive Radio Nodes (COOPON) technique.