Publication

Vehicular communication in a crossroad using visible light

Bibliographic Details
Summary:	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.
Main Authors:	Vieira, Manuel Augusto
Other Authors:	Vieira, Manuela; Louro, Paula; Vieira, Pedro
Subject:	Vehicular communication Light fidelity Visible light communication White LEDs SiC photodetectors OOK modulation scheme Traffic control
Year:	2020
Country:	Portugal
Document type:	article
Access type:	restricted access
Associated institution:	Universidade Politécnica de Lisboa
Language:	English
Origin:	Repositório Científico da Universidade Politécnica de Lisboa

Description
Summary:	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.

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