Development of a Li-Fi Enabled Inter-Vehicle Data Transmission System

Abstract

Nowadays the road accidents are increasing in a drastic amount. It reinforces the importance of efficient and real time communication between vehicles to improve road safety. The usual vehicle-to-vehicle communication systems are mostly dependent on radio frequency (RF) technologies like Wi-Fi, Bluetooth and cellular networks, which have the restrictions such as electromagnetic interference, bandwidth saturation, and security issues. These restrictions reduce their potential for safety-critical applications that require rapid actions. By acknowledging these issues, this proposed project has been developed by aiming to develop a Li-Fi (Light Fidelity) based vehicle-to-vehicle communication system that utilizes visible light for data transfer. In the proposed system, the headlights and rear lamps of vehicles, which are equipped with high-bright LEDs, are used as transmitters, and photodiodes placed on the receiving vehicle are used as receivers. Safety messages such as sudden braking notifications, speed changes, and obstacle notifications are converted into digital signals and transmitted through high-speed LED modulation, which is invisible to the human eye. The receiving vehicle decodes the received information using a microcontroller to produce warning notifications and automatically triggers braking and speed reduction as needed. The proposed Li-Fi communication system has advantages such as low latency, high data transfer rate, improved security, and resistance to RF interference.