Security mechanism in cognitive radio ad hoc networks

摘要

Cognitive Radio (CR) technology is designed to solve the problems arising from limited available spectrum in wireless networks. It can ease the problem of spectrum shortage by allowing unlicensed users (secondary users) to use the same spectrum with imperative users in licensed spectrum bands without creating any interference in imperative communications. A lot of research has been done in Spectrum Sensing of CRs but not much research has been done regarding its security against selfish attacks. In CR network a selfish node is a serious issue which occupies a part or full resources (pre-occupation problem) in the multiple channels, and forbids other legitimate cognitive nodes from consuming the resources. The performance of CR network is degraded by these selfish nodes by capturing the licensed resources reserved for licensed users. In this article we will study about the various security threats to a CR network and will study the relation between the no. of nodes and detection rate of a cognitive radio network by using mechanism of cooperative neighboring cognitive radio nodes.