PERFORMANCE ANALYSIS OF COOPERATION AND NON COOPERATION OF RELAY NODES IN COGNITIVE RADIO AD HOC NETWORKS - A GAME THEORETIC APPROACH
A. Babiyola, V. Cyril Raj · 2014
Cognitive radio (CR) technology is a solution to solve the problems in wireless networks resulting from the limited available spectrum and the inefficiency in the spectrum usage by exploiting the existing wireless spectrum opportunistically. CR networks, equipped with the intrinsic capabilities of the cognitive radio, will provide an ultimate spectrum aware communication paradigm in wireless communications. In cognitive radio ad hoc networks (CRAHN’s), the relay selection with user cooperation could be advantageous to both primary and secondary transmissions. This paper deals with both cooperative and non cooperative relay node games. In cooperative games, players collaborate with each other to jointly maximize the total utility of the game. In non-cooperative game, each player selfishly maximizes its own stationary utility function to reach the best response Nash equilibrium strategies. The Non co operation of Relay nodes can be converted into co operative nodes based on Markov Process. The results reveal, the summation of node utilities in cooperation nodes is always greater than non-cooperative relay nodes and the relay node should be selected and configured according to the system requirements in order to improve the performance of cooperative cognitive radio ad hoc networks