Primary-prioritized Markov approach for dynamic spectrum allocation
IEEE Transactions on Wireless Communications
Competitive spectrum sharing in cognitive radio networks: a dynamic game approach
IEEE Transactions on Wireless Communications
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This paper proposes a method that stabilizes chaotic phenomena, which appears in a user-centric cognitive radio networks by the chaos control theory. In the cognitive radio networks, spectrum resources are shared among the users in order to optimize efficiency of radio resource usage. However, depending on the algorithm of the spectrum sharing procedure, undesirable chaotic oscillation may occur in the network. For such chaotic nonlinear systems, the chaos control theory has been proposed and applied to a wide variety of nonlinear systems in order to stabilize such systems. In this paper, the delay feedback method is introduced as one of the chaos control algorithms, and applied to control of the chaotic phenomena in the cognitive radio networks. We show that our method can stabilize the chaotic oscillations in the usercentric cognitive radio networks. By comparisons with traditional parameter tuning methods, we confirm that our method is more efficient and faster to stabilize the cognitive radio systems.