Physical-Layer Security for Multiuser Computation Offloading with Lyapunov Optimization
Qiuming Liu, Jing Li, Ruoxuan Zhou, Jianming Wei, Shumin Liu, Qiaofu Li · 2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring) · 2022
Mobile Edge Computing (MEC) can migrate traditionally deployed high-energy-consumption and high-complex computing tasks to nearby edge servers, providing users with faster services and better network performance. There is a security problem of malicious access by eavesdroppers when offloading computing tasks. In this article, we propose an access point (AP) and wireless devices (WDs) MEC system. WDs use a binary offloading strategy to calculate tasks. Taking the average time security and the stability of equipment buffer queue as constraints, an online computing offloading method based on Lyapunov is proposed. This method transforms the computing process into an online computing offloading problem with the goal of minimizing the total energy consumption of WDs, so as to decouple the CPU cycle frequency, transmission power and task offloading strategy in different time periods. Simulation results show that this method can achieve better performance in terms of energy consumption compared with other benchmark methods.