Title :
Optimal Channel Sensing Sequence Design for Spectrum Handoff
Author :
Chengyu Wu ; Chen He ; Lingge Jiang ; Yunfei Chen ; Qingjiang Shi
Author_Institution :
Dept. of Electr. Eng., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
This letter considers the optimal channel sensing sequence (CSS) design for spectrum handoff in an overlay multi-channel cognitive radio networks (CRNs). We study the frame structure for spectrum handoff in the Rayleigh fading channels and formulate the CSS design problem as a sequential decision-making problem. Considering the secondary link maintenance probability during a frame, we design the optimal CSS length to achieve the maximum energy efficiency/throughput or the minimum energy consumption. A dynamic programming approach is proposed to solve the CSS design problems. Finally, the performance of the proposed design is examined and discussed using numerical examples.
Keywords :
Rayleigh channels; cognitive radio; decision making; dynamic programming; mobility management (mobile radio); probability; CSS design problem; Rayleigh fading channels; dynamic programming approach; frame structure; multichannel cognitive radio networks; optimal channel sensing sequence design; secondary link maintenance probability; sequential decision-making problem; spectrum handoff; Cascading style sheets; Channel estimation; Cognitive radio; Fading; Sensors; Signal to noise ratio; Throughput; Channel sensing sequence; link maintenance; spectrum handoff; spectrum sensing;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/LWC.2015.2417556
