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1 LISV - Laboratoire d-Ingénierie des Systèmes de Versailles 2 Faculty of Electrical Engineering and Computer Science Suceava

Abstract : — This paper presents a visible light communication system, focusing mostly on the aspects related with the hardware design and implementation. The designed system is aimed to ensure a highly-reliable communication between a commercial LED-based traffic light and a receiver mounted on a vehicle. Enabling wireless data transfer between the road infrastructure and vehicles has the potential to significantly increase the safety and efficiency of the transportation system. The paper presents the advantages of the proposed system and explains same of the choices made in the implementation process. Keywords — intelligent transportation system, light emitting diode, traffic light, vehicle safety, visible light communications. I. INTRODUCTION Light Emitting Diodes LEDs are highly reliable, energy efficient and have a lifetime that exceeds by far the classical light sources. These unique features made the car manufacturers thinking of replacing the halogen lamps by LED lighting systems. At this moment, car lights based on LEDs are common. The efficiency of the LEDs made them being used also for LED-based traffic lights. This new generation of traffic lights is becoming more and more popular and begins to be used on extended scale. The main advantages of these traffic lights are: low maintenance cost, long life, low energy consumption and better visibility. These advantages had already convinced some of the cities authorities to replace the classical traffic lights with new generation LED-based traffic lights 1, 2 whereas, other cities are progressively do this replacement. Besides the advantages mentioned above, LEDs are capable of rapid switching, which enables them to be used for Visible Light Communications VLC. VLC uses the visible light spectrum as a communication medium and since there are no regulations that limit the use of the light spectrum, VLC has the potential to reach extremely high data rates 3.

Autor: Alin Cailean - Barthélemy Cagneau - Luc Chassagne - Suat Topsu - Yasser Alayli - Mihai Dimian -



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