PHY Security Design for Mobile Crowd Computing in ICV Networks Based on Multi-Agent Reinforcement Learning

• Published in: IEEE transactions on wireless communications Vol. 22; no. 10; p. 1
• Main Authors: Luo, Xuewen, Liu, Yiliang, Chen, Hsiao-Hwa, Guo, Qing
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.10.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: adaptive wiretap coding; artificial noise; Communication system security; Computation offloading; Computational modeling; Computing costs; computing task offloading; Cybersecurity; Encoding; Energy consumption; Energy costs; Intelligently connected vehicle; Mobile computing; multi-agent reinforcement learning; Multiagent systems; Optimization; PHY security; Roadsides; Search algorithms; Security; Servers; Task analysis; Wireless communication
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2023.3245637

In this paper, we propose a multi-roadside unit (RSU) assisted mobile crowd computing framework for intelligently connected vehicle (ICV) networks, where vehicles within RSUs' coverage act as workers to provide their computation and communication resources for computing resource limited vehicle user equipments (VUEs). Physical (PHY) layer security is used to secure computation task offloading and results feedback in time-varying vehicular channels. Artificial noise (AN) assisted adaptive wiretap coding is adopted to enhance the security of offloading links. With PHY security, the intended receiver can decode secret message while eavesdropper cannot. A modified exhaustive two-dimensional (2D) search algorithm is proposed to optimize transmission rate and secrecy rate in an effective secrecy throughput maximization problem, and a multi-agent twin delayed deep deterministic policy gradient algorithm (MATD3) is utilized to assign VUEs' tasks without a central controller, where a reward function is defined according to the computing costs, including execution time, energy consumption, and price paid for computing. Finally, simulations verify the effectiveness of the proposed framework.