Abstract:
Spectrum is the essence of communication system. Wireless communication is inaccessible without Spectrum bands.CRNs provide the promising solution for the scarcity of wireless spectrum bands by presenting the idea of efficient utilization of vacant spectrum bands. The survivability of cognitive user under antagonistic conditions is a most challenging task. The survivability will become hard bitten with the actualization of “learning" and “smartness" features of the CRs. Denial of service attack is one of the most destructive type of attacks which creates devastation in the lifeblood of wireless communication system. It prevents the legitimate user to utilize the vacant spectrum band and prevents it from being able to communicate effectively. This thesis presents an adaptive mechanism for potent dynamic spectrum access (DSA) in the presence of DoS attack. Assuming both attacker and SU as rational players, and considering the notion of channel payoff, the optimal strategy is entrenched by presenting a scenario as zero-sum game which conclude to Nash equilibrium. We present linear programming algorithm to solve the mixed strategy Nash Equilibria.
