Real-world Latency Analysis of Vehicular Visible Light Communication with Multiple LED Transmitters and an Event-Based Camera
For V2X communication, this work demonstrates that event-camera-based VLC is a feasible complement to RF technologies, addressing practical challenges like multi-transmitter reception and latency.
This work presents an event-camera-based VLC system for V2X that suppresses bandwidth saturation, enables simultaneous reception from up to three LED transmitters, and achieves end-to-end latency meeting cooperative perception requirements in real vehicular scenarios.
Event cameras offer high temporal resolution, low latency, and wide dynamic range, making them promising receivers for visible light communication (VLC) in vehicle-to-everything (V2X) applications. This work presents an event-camera-based VLC system addressing three key challenges: bandwidth saturation, multi-transmitter reception, and latency characterization. We adopt a positive-event-only mode and design a protocol that suppresses event generation while maintaining communication distance and a wide field of view. We also propose a method to identify multiple transmitters and demonstrate simultaneous reception from up to three LEDs. Finally, we evaluate end-to-end latency in real vehicular scenarios and show that the system meets cooperative perception requirements. These results demonstrate that event-camera-based VLC is a feasible complement to existing V2X technologies (e.g., RF).