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Vol. 245, Issue 6, October 2020, pp. 41-48




Vehicular Communication in a Crossroad Using Visible Light

1, 2, * Manuel Augusto Vieira, 1, 2, 3 Manuela Vieira, 1, 2 Paula Louro and 1, 4 Pedro Vieira

1 Electronics Telecommunication and Computer Dept. ISEL, R. Conselheiro Emídio Navarro, 1959-007 Lisboa, Portugal
2 CTS-UNINOVA, Quinta da Torre, Monte da Caparica, 2829-516, Caparica, Portugal
3 DEE-FCT-UNL, Quinta da Torre, Monte da Caparica, 2829-516, Caparica, Portugal
4 Instituto de Telecomunicações, Instituto Superior Ténico, 1049-001, Lisboa, Portugal
Tel.: + 351218317000

E-mail: mv@isel.pt


Received: 22 September 2020 /Accepted: 22 October 2020 /Published: 30 October 2020

Digital Sensors and Sensor Sysstems


Abstract: In this work the communication between the infrastructures and the vehicles, between vehicles and from the vehicles to the infrastructures is performed through Visible Light Communication (VLC) using the street lamps and the traffic signaling to broadcast the information. Data is encoded, modulated and converted into light signals emitted by the transmitters. Tetra-chromatic white sources are used providing a different data channel for each chip. As receivers and decoders, SiC Wavelength Division Multiplexer (WDM) devices, with light filtering properties, are used. To control the arrival of vehicles to an intersection and schedule them to cross at times that minimize delays are primary objectives. A Vehicle-to-Everything (V2X) traffic scenario is stablished and bidirectional communication between the infrastructure and the vehicles is tested, using the VLC request/response concept. A phasing traffic flow is developed as a proof of concept. The experimental results confirm the cooperative VLC architecture showing that communication between connected cars is optimized using a request/response concept. An increase in the traffic throughput with least dependency on infrastructure is achieved.


Keywords: Vehicular Communication, Light Fidelity, Visible Light Communication, White LEDs, SiC photodetectors, OOK modulation scheme, Traffic control.


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