Title :
Adaptive Power Control Based Spectrum Handover for Cognitive Radio Networks
Author :
Lu, Dainjie ; Huang, Xiaoxiu ; Liu, Cong ; Fan, Jianping
Author_Institution :
Inst. of Comput. Technol., Beijing, China
Abstract :
This paper focuses on spectrum handover in cognitive radio networks where secondary users (SUs) opportunistically use licensed channels as long as the aggregate interference at the primary users (PUs) does not exceed a certain threshold. We incorporate power control into the proposed spectrum handover scheme to reduce the number of spectrum handovers and enhance the spectral efficiency. In our work, when a PU arrives, an SU first calculates the maximum transmission power that the SU does not interfere with the PU. If the SU can still reach its receiver, it lowers its power and continues to transmit; otherwise it switches to an idle band. Analysis results show that our proposed scheme can substantially reduce the spectrum handover ratio and improve the effective data rate by up to 30%.
Keywords :
adaptive control; cognitive radio; radiofrequency interference; telecommunication control; adaptive power control; aggregate interference; cognitive radio networks; primary users; receivers; secondary users; spectrum handover ratio; spectrum handover scheme; Adaptive control; Chromium; Cognitive radio; Degradation; Frequency; Interference; Power control; Programmable control; Switches; Temperature;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2010 IEEE
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4244-6396-1
DOI :
10.1109/WCNC.2010.5506405