Design an efficient MAC Protocol for Cognitive Radio Systems using Game Theory

Abstract

In this paper we consider power distribution between cognitive users which is the most crucial problems in cognitive radio systems. To ensure perfect distribution game theory is applied. Conflicting users who are trying to access the same channel are detected first. Targeted signal to noise ratio (SNR) is achieved by iterative fashion which determines the signal strength. Power is calculated for each user by convergence theorem. Power is distributed in such way that it increases system utility. At last Nash equilibrium point is formulated for ensuring the avoidance of selfish behavior of cognitive users. Experimental results show that the proposed strategy achieves the ability to reduce the power consumption in order to increase the system utility.