A novel cognitive radio spectrum assignment scheme for maximizing system utilization

IEICE Electronics Express

Jung-Chieh Chen¹ 

[1] Department of Optoelectronics and Communication Engineering, National Kaohsiung Normal University

关键词: cross-entropy method;    cognitive radio;    spectrum allocation;   

DOI  :  10.1587/elex.8.472

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(9)This paper deals with the problem of spectrum sharing among primary and secondary users in a cognitive radio. To use the spectrum efficiently and flexibly, the cognitive radio spectrum allocation problem was formulated as a graph coloring problem (GCP). However, GCP is known to be a nondeterministic polynomial-time (NP)-hard and cannot be solved for the practical system. Inspired by the efficiency of the cross-entropy (CE) method for finding near-optimal solutions in huge search spaces, this paper proposes the application of the CE method to allocate cognitive radio spectrum to achieve near-optimal spectrum utilization. Simulation results show that the average reward values obtained using the proposed CE method are better than those obtained using the conventional method.

【 授权许可】

Unknown