Secrecy Wireless-Powered Sensor Networks for Internet of Things

Secrecy Wireless-Powered Sensor Networks for Internet of Things
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用于物联网的保密无线供电传感器网络

DOI:
10.1155/2020/8859264
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发表时间:
2020-09
影响因子:
--
通讯作者:
Pervaiz Haris
Pervaiz Haris
中科院分区:
计算机科学4区
文献类型:
--
作者:
Li Junxia;Zhao Hui;Chen Xueyan;Chu Zheng;Zhen Li;Jiang Jing;Pervaiz Haris

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本文借助协作干扰器(CJ)研究了一种安全的无线供电传感器网络(WPSN)。在存在多个窃听者的情况下,发电站(PS)为用户设备(UE)和协作干扰器无线充电,以便安全地向接入点(AP)传输信息。此外,部署了协作干扰器,它可以引入更多干扰来降低恶意窃听者的性能。为了提高安全性能,我们制定了一个优化问题,即最大化接入点的保密率,以联合设计安全波束形成器和能量时间分配。由于所制定的问题不是凸问题,我们首先提出一种采用半定规划(SDP)松弛的全局最优解。同时,评估了SDP松弛解的紧致性。此外,我们研究了一种最坏情况,其中能量时间分配以封闭形式实现。最后,给出了数值结果,以证实与基准方案相比所提方案的有效性。
This paper investigates a secure wireless-powered sensor network (WPSN) with the aid of a cooperative jammer (CJ). A power station (PS) wirelessly charges for a user equipment (UE) and the CJ to securely transmit information to an access point (AP) in the presence of multiple eavesdroppers. Also, the CJ are deployed, which can introduce more interference to degrade the performance of the malicious eavesdroppers. In order to improve the secure performance, we formulate an optimization problem for maximizing the secrecy rate at the AP to jointly design the secure beamformer and the energy time allocation. Since the formulated problem is not convex, we first propose a global optimal solution which employs the semidefinite programming (SDP) relaxation. Also, the tightness of the SDP relaxed solution is evaluated. In addition, we investigate a worst-case scenario, where the energy time allocation is achieved in a closed form. Finally, numerical results are presented to confirm effectiveness of the proposed scheme in comparison to the benchmark scheme.
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