DocumentCode :
713746
Title :
On channel selection schemes for spectrum sensing in cognitive radio networks
Author :
Rastegardoost, Nazanin ; Jabbari, Bijan
Author_Institution :
Dept. of Electr. & Comput. Eng., George Mason Univ., Fairfax, VA, USA
fYear :
2015
fDate :
9-12 March 2015
Firstpage :
955
Lastpage :
959
Abstract :
A MAC-layer channel selection scheme is proposed in this paper for efficient discovery of spectrum opportunities in the cognitive radio networks. In a practical uncertain cognitive environment, secondary users are unaware of the primary traffic statistics. Thus, in order to maximize the utilization, they need to obtain fairly accurate estimations of spectrum availability along with the actual sensing procedure, so as to learn when to sense which frequency channel. However, it is important not to waste the time, energy and the potential opportunities to explore primary´s behavior in all frequency bands. In this work we investigate a low-complexity method referred to as modified myopic scheme, inspired by myopic strategy, whose gain converges to the highest possible throughput shortly after learning primary´s activity and finding the most likely available channels. We also show that the secondary performance is inversely proportional to the lowest activity level of primary among all channels, rather than its average level. Therefore, highly-congested channels do not reduce the cognitive user´s gain. The effect of sensing errors is also studied. Simulation results indicate the accuracy of our statements as well as the effectiveness of our scheme compared to the other strategies.
Keywords :
access protocols; cognitive radio; radio spectrum management; signal detection; telecommunication channels; MAC-layer channel selection scheme; channel selection schemes; cognitive radio networks; cognitive user; frequency channel; modified myopic scheme; primary traffic statistics; spectrum availability; spectrum opportunities; spectrum sensing; Channel estimation; Cognitive radio; Conferences; Estimation; Resource management; Sensors; Throughput; MAC-layer sensing; channel sensing order; cognitive radio; spectrum availability estimation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2015 IEEE
Conference_Location :
New Orleans, LA
Type :
conf
DOI :
10.1109/WCNC.2015.7127598
Filename :
7127598
Link To Document :
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