Decentralized Blind Spectrum Selection in Cognitive Radio Networks Considering Handoff Cost

Yongqun Chen, Huaibei Zhou, Ruoshan Kong, Li Zhu and Huaqing Mao
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Yongqun Chen: School of Physics and Technology, Wuhan University, Wuhan 430072, China
Huaibei Zhou: International School of Software, Wuhan University, Wuhan 430072, China
Ruoshan Kong: International School of Software, Wuhan University, Wuhan 430072, China
Li Zhu: Oujiang College, Wenzhou University, Chashan University Town, Wenzhou 325035, China
Huaqing Mao: Oujiang College, Wenzhou University, Chashan University Town, Wenzhou 325035, China

Future Internet, 2017, vol. 9, issue 2, 1-8

Abstract: Due to the spectrum varying nature of cognitive radio networks, secondary users are required to perform spectrum handoffs when the spectrum is occupied by primary users, which will lead to a handoff delay. In this paper, based on the multi-armed bandit framework of medium access in decentralized cognitive radio networks, we investigate blind spectrum selection problem of secondary users whose sensing ability of cognitive radio is limited and the channel statistics are a priori unknown, taking the handoff delay as a fixed handoff cost into consideration. In this scenario, secondary users have to make the choice of either staying foregoing spectrum with low availability or handing off to another spectrum with higher availability. We model the problem and investigate the performance of three representative policies, i.e., ρ PRE , SL(K), k th-UCB1. The simulation results show that, despite the inclusion of the fixed handoff cost, these policies achieve the same asymptotic performance as that without handoff cost. Moreover, through comparison of these policies, we found the k th-UCB1 policy has better overall performance.

Keywords: cognitive radio networks; opportunistic spectrum access; multi-armed bandit; handoff cost; distributed algorithms (search for similar items in EconPapers)
JEL-codes: O3 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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