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Delay QoS Guaranteed Cooperative Double-Threshold Sensing Scheme in Cognitive Radio Networks

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Abstract

In cognitive radio networks, cooperation can greatly improve the performance of spectrum sensing. This paper proposes a delay (QoS) quality-of-service guaranteed cooperative spectrum sensing frame structure in which secondary users (SUs) conduct spectrum sensing and data transmission concurrently over two different parts of the primary user spectrum band. A double-threshold sensing scheme is employed in the local sensing step, only the SUs with reliable sensing information are allowed to transmit their “one bit” local decisions to the fusion center. The sensing performance and the SU transmission delay are analyzed in detail in this paper. Computer simulations show that the delay QoS guaranteed cooperative double-threshold sensing scheme could not only decrease the SU transmission delay but also save the reporting overhead of the SUs compared with the conventional detection method with one threshold.

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Acknowledgments

This work This work is supported by the National Fundament Research of China (973 No. 2009CB3020400), Jiangsu Province Natural Science Foundation under Grant BK2011002, National Natural Science Foundation of China (No. 61072044).

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Authors and Affiliations

  1. Institute of Communications Engineering, PLA University of Science and Technology, No. 2 Biaoying, Yudao street, Nanjing , 210007, China

    Hang Hu, Hang Zhang & Hong Yu

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  1. Hang Hu
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  2. Hang Zhang
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  3. Hong Yu
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Correspondence to Hang Zhang.

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Hu, H., Zhang, H. & Yu, H. Delay QoS Guaranteed Cooperative Double-Threshold Sensing Scheme in Cognitive Radio Networks. Wireless Pers Commun 77, 3209–3221 (2014). https://doi.org/10.1007/s11277-014-1705-3

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  • DOI: https://doi.org/10.1007/s11277-014-1705-3

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