AirComp-aided Safety-aware CAM Broadcast Rate Control in C-V2X Sidelink

• Published in: 2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring) pp. 1 - 7
• Main Authors: Hsieh, Da-Yung, Kuo, Jian-Jhih, Chen, Wen-Tsuen, Sheu, Jang-Ping
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.06.2023
• Subjects: Aggregates; C-V2X sidelink; congestion avoidance; Estimation; Information age; Measurement; over-the-air computation; Prediction algorithms; Simulation; transmission rate control; Vehicular and wireless technologies; Vehicular networks
• ISSN: 2577-2465
• DOI: 10.1109/VTC2023-Spring57618.2023.10199437

Promising vehicle-to-everything (V2X) communication technologies can increase road safety by periodically broad-casting Cooperative Awareness Messages (sCAMs) that contain vehicles' status and attribute information, such as time, location, velocity, motion state, and vehicle type, to all nearby vehicles. However, out-of-date information and prediction deviations may cause potential risks and severe vehicle safety problems. In this paper, we propose an efficient safety-aware CAM broadcast rate control algorithm termed DESBRAC for vehicles to consider more safety metrics and determine the CAM broadcast rates cooperatively. Furthermore, we introduce Over-the-Air Computation (AirComp) to help vehicles aggregate information from their nearby vehicles instantly for metric estimation and cooperative CAM broadcast rate determination. Finally, the simulation results based on a simple and a realistic scenarios of vehicular networks show that our algorithm can achieve an improvement of about 31% in driving safety compared to the state-of-the-art algorithms.