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Anti-Wiretap Spectrum-Sharing for Cooperative Cognitive Radio Communication Systems
Open AccessArticle

A Hybrid Spectrum Access Strategy with Channel Bonding and Classified Secondary User Mechanism in Multichannel Cognitive Radio Networks

School of Computer and Communication Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China
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Sensors 2019, 19(20), 4398; https://doi.org/10.3390/s19204398
Received: 29 July 2019 / Revised: 4 October 2019 / Accepted: 8 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Measurements for Cognitive Radio Communication Systems)
Cognitive radio networks (CRNs) can improve spectrum utilization by allowing secondary users (SUs) to dynamically access channels unoccupied by primary users (PUs). The spectrum access strategy, as a point to enhance user performance, has received much attention. In this paper, we propose a hybrid access mode for network users in multichannel CRNs. For meeting different SU demands, SUs are classified as SU1s and SU2s. We further introduce a channel bonding scheme for high-priority (PU and SU1) user packets to enhance transmission efficiency. At the same time, we propose a hybrid spectrum access strategy for SU2 packets to improve their transmission stability. By establishing a Markov chain model, some important SU2 packets’ performance measures are derived. Furthermore, we display the comparison of hybrid, overlay and underlay modes by numerical results to analyze the advantages of different modes. View Full-Text
Keywords: cognitive radio networks; multichannel; hybrid access mode; channel bonding; classified secondary users cognitive radio networks; multichannel; hybrid access mode; channel bonding; classified secondary users
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Zhao, Y.; Peng, M.; Liu, J. A Hybrid Spectrum Access Strategy with Channel Bonding and Classified Secondary User Mechanism in Multichannel Cognitive Radio Networks. Sensors 2019, 19, 4398.

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