Title :
An Improved Guard Channel Algorithm in Cognitive Radio System
Author :
Cai Lili ; Zhu Qi
Author_Institution :
Jiangsu Key Lab. of Wireless Commun., Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
Cognitive radio technology has arisen as a hot topic in wireless communication in recent years. Special spectrum allocation algorithms are essential to adapt to the time-space varying characteristics of wireless spectrum in cognitive networks. In this paper, we study and simulate the guard channel policy proposed by Huang Zhen, etc. We find that the blocking probability of secondary users is relatively high and channel utilization is relatively low. In view of the above two points, we propose an improved algorithm to improve the performance. The simulation results show that both the blocking probability and channel utilization are improved.
Keywords :
channel allocation; cognitive radio; probability; radio spectrum management; wireless channels; Huang Zhen; blocking probability; channel utilization; cognitive radio system; guard channel policy; time-space varying characteristics; wireless communication; wireless spectrum allocation algorithm; Algorithm design and analysis; Analytical models; Cognitive radio; Frequency; Interchannel interference; Laboratories; Mobile communication; Radio network; Radio spectrum management; Wireless communication;
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
DOI :
10.1109/WICOM.2009.5301783
