Title :
Optimal Energy-Efficient Channel Exploration for Opportunistic Spectrum Usage
Author :
Xu, Yuhua ; Wang, Jinlong ; Wu, Qihui ; Zhang, Zongsheng ; Anpalagan, Alagan ; Shen, Liang
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
fDate :
4/1/2012 12:00:00 AM
Abstract :
This letter studies the channel exploration problem for opportunistic spectrum usage systems, where exploring state information of each channel consumes time and energy. We formulate this problem as an optimal stopping problem and propose a myopic rule with low complexity, called one stage look ahead (1-SLA), to solve it. Moreover, the optimality of the 1-SLA rule for the energy-efficient channel exploration problem is proved, and simulation results are provided to show the effectiveness of the 1-SLA rule.
Keywords :
radio spectrum management; wireless channels; 1-SLA rule; one stage look ahead; opportunistic spectrum usage systems; optimal energy-efficient channel exploration problem; optimal stopping problem; state information; Cognitive radio; Complexity theory; Energy consumption; Fading; Sensors; Throughput; Opportunistic spectrum usage; multichannel diversity; optimal stopping rule;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2012.012012.110257
