In this work, we study the buffer-aided relaying mechanism in a UAV-enabled mobile relaying system assisting the terrestrial communications. Optimal UAV trajectory design against a randomly located eavesdropper is investigated from the physical layer (PHY) security perspective considering the wireless channel dynamics as the UAV relay moves in the air. Specifically, we maximize the sum secrecy rate by optimizing the discrete trajectory anchor points based on the information causality and UAV mobility constraints. To make the non- convex problem tractable, the increments of the trajectory anchor points are optimized instead through an iterative updating procedure, and successive convex approximation technique is applied for progressive optimization. The convergence of the proposed iterative optimization technique is proved by introducing additional rate bound constraints and employing the squeeze principle. Simulation results show that the proposed optimal trajectory finding algorithm is effective and fast converging. Simulation results also reveal that the distribution of the eavesdropper location has a significant impact on the PHY security performance.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Trajectory Optimization for Physical Layer Secure Buffer-Aided UAV Mobile Relaying


    Contributors:
    Shen, Lingfeng (author) / Zhu, Zhengyu (author) / Wang, Ning (author) / Ji, Xiang (author) / Mu, Xiaomin (author) / Cai, Lin (author)


    Publication date :

    2019-09-01


    Size :

    224700 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Buffer-Aided DF Relaying Network with CCI

    Manoj, B. R. / Mallik, Ranjan K. / Bhatnagar, Manav R. | IEEE | 2019


    Performance of Incremental Relaying with an Energy-Buffer Aided Relay

    Bapatla, Dileep / Prakriya, Shankar | IEEE | 2019



    HAP-Aided Relaying Satellite FSO/QKD Systems for Secure Vehicular Networks

    Vu, Minh Q. / Dang, Ngoc T. / Pham, Anh T. | IEEE | 2019


    Secure Transmission Scheme Design for SWIPT in Buffer-aided Relay Networks

    Ren, Juanjuan / Lei, Xianfu / Diamantoulakis, Panagiotis D. et al. | IEEE | 2020