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Outage-driven link selection for secure buffer-aided networks

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Abstract

In this paper, we investigate secure communication in a two-hop wireless network, where multiple buffer-aided relays assist to securely forward data from the sender to the destination threatened by a passive eavesdropper. To satisfy the security and delay requirements, we propose a novel link selection policy without the instantaneous wiretap channel state information. Different from the most current link selection policies, the proposed link selection policy is designed by joint considering the link secrecy outage probability and the buffer states. To evaluate the secrecy performance, we first characterize the system state transition matrix and the stationary state probability, and then derive the closed-form expressions for the secrecy outage probability and the secrecy rate. Moreover, we formulate a framework based on the queuing theory to analyze the end-to-end information delay at the source, the relays, and the queues, and derive the closed-form expression for the information delay. Finally, we conduct simulations to validate our theoretical performance analysis, and verify the performance improvement of the proposed outage-driven secure transmission scheme in terms of secrecy outage probability and information delay.

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Acknowledgements

This work was supported in part by National Natural Science Foundation of China (Grant Nos. 61901379, 61941119, 62071223, 62031012), in part by National Key Research and Development Project (Grant No. 2020YFB1807602), in part by Young Elite Scientist Sponsorship Program by CAST, in part by Open Research Fund of National Mobile Communications Research Laboratory, Southeast University (Grant No. 2020D04), and in part by Foundation of the Science, Technology, and Innovation Commission of Shenzhen Municipality (Grant No. JCYJ20190806160218174).

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Authors and Affiliations

  1. School of Electronics and Information, Northwestern Polytechnical University, Xi’an, 710072, China

    Dawei Wang, Tianmi He & Ruonan Zhang

  2. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, China

    Dawei Wang

  3. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China

    Dawei Wang

  4. College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, China

    Fuhui Zhou & Qihui Wu

  5. Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, China

    Fuhui Zhou & Qihui Wu

  6. School of Engineering, The University of British Columbia, Kelowna, V1V1V7, Canada

    Julian Cheng

Authors
  1. Dawei Wang
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  2. Tianmi He
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  3. Fuhui Zhou
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  4. Julian Cheng
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  5. Ruonan Zhang
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Correspondence to Fuhui Zhou.

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Wang, D., He, T., Zhou, F. et al. Outage-driven link selection for secure buffer-aided networks. Sci. China Inf. Sci. 65, 182303 (2022). https://doi.org/10.1007/s11432-021-3262-3

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  • DOI: https://doi.org/10.1007/s11432-021-3262-3

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