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Title: Cluster-based adaptive multispectrum sensing and access in cognitive radio networks
Authors: Zhang, Wenjie
Yeo, Chai Kiat
Keywords: Cognitive Radio
Spectrum Sensing And Access
Engineering::Computer science and engineering
Issue Date: 2012
Source: Zhang, W., & Yeo, C. K. (2015). Cluster-based adaptive multispectrum sensing and access in cognitive radio networks. Wireless Communications and Mobile Computing. doi:10.1002/wcm.2319
Series/Report no.: Wireless communications and mobile computing
Abstract: Spectrum sensing and access have been widely investigated in cognitive radio network for the secondary users to efficiently utilize and share the spectrum licensed by the primary user. We propose a cluster-based adaptive multispectrum sensing and access strategy, in which the secondary users seeking to access the channel can select a set of channels to sense and access with adaptive sensing time. Specifically, the spectrum sensing and access problem is formulated into an optimization problem, which maximizes the utility of the secondary users and ensures sufficient protection of the primary users and the transmitting secondary users from unacceptable interference. Moreover, we explicitly calculate the expected number of channels that are detected to be idle, or being occupied by the primary users, or being occupied by the transmitting secondary users. Spectrum sharing with the primary and transmitting secondary users is accomplished by adapting the transmission power to keep the interference to an acceptable level. Simulation results demonstrate the effectiveness of our proposed sensing and access strategy as well as its advantage over conventional sensing and access methods in terms of improving the achieved throughput and keeping the sensing overhead low.
ISSN: 1530-8677
DOI: 10.1002/wcm.2319
Schools: School of Computer Engineering 
Rights: © 2012 John Wiley & Sons, Ltd. published by Hindawi Publishing Corporation. This is an open-access article distributed under the terms of the Creative Commons Attribution License.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCSE Journal Articles

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