Security-Reliability Tradeoff in UAV-Carried Active RIS-Assisted Cooperative Networks
Security-Reliability Tradeoff in UAV-Carried Active RIS-Assisted Cooperative Networks
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DOI：
10.1109/lcomm.2023.3347294
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发表时间：
2024-02
期刊：
影响因子：
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通讯作者：
Jing Yuan;Gaojie Chen;Miaowen Wen;Dehuan Wan;K. Cumanan
中科院分区：
文献类型：
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作者：
Jing Yuan;Gaojie Chen;Miaowen Wen;Dehuan Wan;K. Cumanan
在这封信中，我们提出了一种无人机携带的主动可重构智能面(RIS)辅助协作网络，由源(S)、可信用户(U)和不可信用户(E)组成，由多个半双工解码转发中继器和安装在悬停无人机上的主动RIS连接起来。在UARCN中，U、E和中继器仅在第一个时隙中通过激活的RIS接收来自S的信号，然后从成功的解码中继器中选择一个通过直接链路和RIS在第二个时隙中进一步发送信息。通过对中断概率和截获概率的联合分析，研究了系统的安全性和可靠性权衡。仿真结果验证了我们的理论分析，表明主动RIS比被动RIS和混合RIS对系统的SRT有更大的改善，并且其位置可以进一步优化。
In this letter, we propose an unmanned aerial vehicle (UAV)-carried active reconfigurable intelligent surface (RIS)-assisted cooperative network (UARCN) with a source (S), a trustworthy user (U), and an untrustworthy user (E), which is bridged by multiple half-duplex decode-and-forward relays and an active RIS mounted on a hovering UAV. In the UARCN, both U, E, and relays receive the signal from S through the active RIS merely in the first time slot; then one out of the successful decoding relays is selected to further transmit information via the direct link and RIS in the second time slot. The outage probability and intercept probability are jointly analyzed to investigate the security and reliability tradeoff (SRT) of the system. Simulation results validate our theoretical analysis, revealing that the active RIS can bring greater improvement to the system SRT than passive or hybrid RIS, and its location can be further optimized.