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A Bandwidth-Efficient Transmission Scheme Based on Spectrum Sensing Results in CR Networks

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Abstract

A bandwidth-efficient transmission scheme based on conservative spectrum sensing results without a common reporting channel is proposed for cognitive radio (CR) networks. A secondary relay node can assist a secondary source node for both spectrum sensing and data transmission. The secondary source node determines when it needs to cooperate with the secondary relay node by checking the sensing results reported from the destination and relay nodes. The CR relay transmission mode is restricted to necessary condition when the directed link between the source node and destination node fails, which improves the bandwidth efficiency of secondary data transmission. Furthermore, spectrum sensing time is optimized to maximize the expected bandwidth efficiency under the constraints of spectrum sensing requirements. Numerical results verify the effectiveness of our scheme .

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Acknowledgements

This work was supported in part by the National Natural Science Foundation of China (61401053, 6157073), the National Science and Technology Specific Project of China (2016ZX03001010-004) and the special fund of Chongqing key laboratory (CSTC), the Program for Changjiang Scholars and Innovative Research Team in University (IRT_16R72) and the Doctor Start-up Funding of CQUPT (A2016-83).

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  1. Taiping Cui

    Present address: Chongqing Key Lab of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China

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  1. Telecommunication Engineering Laboratory, Inha University, 100 Inha-ro, Nam-gu, Incheon, 402-751, Korea

    Taiping Cui & Kyungsup Kwak

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  1. Taiping Cui
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  2. Kyungsup Kwak
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Correspondence to Kyungsup Kwak.

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Cui, T., Kwak, K. A Bandwidth-Efficient Transmission Scheme Based on Spectrum Sensing Results in CR Networks. Wireless Pers Commun 96, 3179–3191 (2017). https://doi.org/10.1007/s11277-017-4347-4

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