DocumentCode :
2154212
Title :
A New Mechanism of Dynamic Spectrum Allocation in the Cognitive Network
Author :
Su, Xi ; Yuan, Chaowei ; Shen, Shuqun
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing, China
fYear :
2009
fDate :
24-26 Sept. 2009
Firstpage :
1
Lastpage :
4
Abstract :
Cognitive radio is thought to be a flexible way to improve the spectrum efficiency. The major challenge is that the communications in the cognitive radio network would be affected by the behaviors of licensed incumbents. The cognitive system must vacate the channel within moving time whenever the licensed incumbents re-occupy that channel, in order to reduce the interference to the licensed system. Besides, in the licensed system, the channels are used by licensed incumbents independently, therefore, the licensed channels have different occupancy ratio. In this study, we propose an improved mechanism considering the channels characteristics in spectrum allocation. The new method can make use of the spectrum characteristics to maximum the spectrum availability and reduce the probability of drop rate in the cognitive system. Besides, our proposed scheme can guarantee the fairness among multi-cells. Through simulation results, it is shown that the proposed scheme can enhance performance of the cognitive network.
Keywords :
cellular radio; channel allocation; cognitive radio; interference suppression; optimisation; probability; radio networks; radio spectrum management; radiofrequency interference; wireless channels; cognitive radio network; drop rate probability reduction; dynamic spectrum allocation mechanism; interference reduction; licensed channel re-occupancy ratio; licensed incumbent behavior; licensed system; multicell fairness; performance enhancement; spectrum availability maximization; Availability; Chaotic communication; Cognitive radio; Costs; FCC; Interference; Radio spectrum management; Switches; System performance; TV;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
Type :
conf
DOI :
10.1109/WICOM.2009.5304049
Filename :
5304049
Link To Document :
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