Investigation on secure and reliable communication in cognitive radio networks

Abstract

The recent advances in wireless communication have led to the problem of growing spectrum scarcity As new wireless applications are emerging day after another and making use of the available wireless spectrum for communication the demand for spectrum increase makes the available spectrum scarcer Large portion of the allocated spectrum is sporadically used leading to underutilization of significant amount of spectrum Cognitive Radio CR is a new technology that enables an unlicensed secondary user to coexist with licensed primary users in licensed spectrum bands without inducing interference to licensed primary users communication This technology can significantly ease the spectrum shortage problem and improve the efficiency of spectrum utilization Cognitive Radio Networks CRN or Dynamic Spectrum Access Networks are formed by several CR nodes and they are often called as NeXt Generation XG communication networks This XG communication network is aimed to provide high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques CRNs have attracted great research interest in the recent years However research on the security aspects of CRNs has been very limited As CRN is similar to wireless network the nature of the wireless media is open air it is more vulnerable to attacks as compared to that of wired network The data in the wireless media may be eavesdropped or altered without notice and the channel might be jammed or overused by the adversaries Hence it is aimed to provide a secured communication in CRN newline