Security status updates based on intelligent reflecting surface assistance and age of information metrics

被引：0

作者：

Li B.-G. ^{[1
]}

Wang Y. ^{[1
]}

Kong F.-W. ^{[2
]}

Tian C.-W. ^{[1
]}

机构：

[1] Department of Electronic and Communication Engineering, North China Electric Power University（Baoding）, Baoding

[2] State Grid Hebei Electric Power Co. Ltd., Shijiazhuang

来源：

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2023年 / 53卷 / 10期

关键词：

age of information; intelligent reflecting surface; physical layer security; reinforcement learning; secrecy age; secrecy age outage probability;

D O I：

10.13229/j.cnki.jdxbgxb.20211326

中图分类号：

学科分类号：

摘要：

In order to meet the requirements of the Internet of everything and physical layer security，a design method of secure beamforming assisted by intelligent reflecting surface is proposed to realize active defense against the communication security of status update system with multiple eavesdroppers and multiple legitimate users.Meanwhile，the requirement of information freshness in the status update scenario is considered，so the information age performance metrics of average confidentiality age and interruption probability of confidentiality age are introduced. Under the constraints of transmit power，state update probability and IRS reflection phase shift，the beamforming matrix，IRS phase shift and state update probability are jointly optimized to ensure state update while maximizing system security. For the dynamics and complexity of the system and the challenge of non-convex optimization，a secure beamforming method based on double deep Q network algorithm is proposed to realize the optimal beamforming strategy for eavesdroppers in dynamic environment. The simulation results show that the proposed secure beamforming method based on double deep Q network can significantly improve the security of IRS assisted state updating system. © 2023 Editorial Board of Jilin University. All rights reserved.

引用

页码：3014 / 3025

页数：11

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