arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.06564cs.ITeess.SPmath.IT
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无人机辅助通信中安全传输的时延最小化设计

Latency-Minimized Design of Secure Transmissions in UAV-Aided Communications

Xiongwei Wu, Qiang Li, Yawei Lu, H. Vincent Poor, Victor C. M. Leung, P. C. Ching

摘要:

无人机具有机动性强、部署灵活等特点,可以作为空中基站为远程移动用户提供通信服务。然而,视距(LoS)无线链路容易被窃听者(Eve)截获,这对无人机辅助通信提出了重大挑战。在本文中,我们提出了一个延迟最小化的传输方案,以满足合法用户(LU)的内容请求安全地对夏娃。通过利用物理层安全(PLS)技术,我们制定了一个传输延迟最小化的问题,通过联合优化无人机轨迹和用户关联。由此产生的问题是一个混合整数非线性规划(MINLP),这是已知的NP难。此外,优化变量的维数是不确定的,这再次使我们的问题非常具有挑战性。为了有效地解决这个问题,我们利用二分法搜索最小传输延迟,并引入变分惩罚方法来解决相关的子问题,通过不精确的块坐标下降方法。此外,我们提出了一个最优解的特征。仿真结果证明了所提出的设计的优越性能。

英文摘要:

Unmanned aerial vehicles (UAVs) can be utilized as aerial base stations to provide communication service for remote mobile users due to their high mobility and flexible deployment. However, the line-of-sight (LoS) wireless links are vulnerable to be intercepted by the eavesdropper (Eve), which presents a major challenge for UAV-aided communications. In this paper, we propose a latency-minimized transmission scheme for satisfying legitimate users' (LUs') content requests securely against Eve. By leveraging physical-layer security (PLS) techniques, we formulate a transmission latency minimization problem by jointly optimizing the UAV trajectory and user association. The resulting problem is a mixed-integer nonlinear program (MINLP), which is known to be NP hard. Furthermore, the dimension of optimization variables is indeterminate, which again makes our problem very challenging. To efficiently address this, we utilize bisection to search for the minimum transmission delay and introduce a variational penalty method to address the associated subproblem via an inexact block coordinate descent approach. Moreover, we present a characterization for the optimal solution. Simulation results are provided to demonstrate the superior performance of the proposed design.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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