Connected cars: Road-to-vehicle communication through visible light

M. A. Vieira, M. Vieira, Paula Louro, Pedro Vieira

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A safe smart vehicle lighting system that combines the functions of illumination, signaling, communications, and positioning is presented. The communication between the infrastructures and the vehicles (I2V), between vehicles (V2V) and from the vehicles to the infrastructures (V2I) is performed through Visible Light Communication (VLC) using the street lamps and the traffic signaling LEDs to broadcast the information. Vehicle headlamps are used to transmit data to other vehicles or infrastructures (traffic lights) allowing digital safety and data privacy. As receivers and decoders, pin/pin SiC Wavelength Division Multiplex (WDM) photodetectors, with light filtering properties, are being used. We propose the use of white polychromatic-LEDs to implement the WDM. This allows modulating separate data streams on four colors which together multiplex to white light. When a probe vehicle enters the infrastructure's capture range, the receivers respond to light signal and the infrastructure ID and traffic message are assigned. They perform simultaneously the V2V distance measurement and data transmission functions and, using the headlamps, resend the data to the other vehicles or to the traffic signals (V2I). A I2V2V2I traffic scenario is stablished. A vulnerable road user case that covers pedestrians, cyclists and wheelchairs is also considered. A phasing traffic flow is developed as a Proof of Concept (PoC). The experimental results confirm that the cooperative vehicular VLC architecture is a promising approach concerning communications between road infrastructures and cars, fulfilling data privacy.

Original languageEnglish
Title of host publicationNext-Generation Optical Communication: Components, Sub-Systems, and Systems VIII
EditorsGuifang Li, Xiang Zhou
PublisherSPIE-International Society for Optical Engineering
ISBN (Electronic)9781510625365
DOIs
Publication statusPublished - 2019
EventNext-Generation Optical Communication: Components, Sub-Systems, and Systems VIII 2019 - San Francisco, United States
Duration: 4 Feb 20197 Feb 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE-International Society for Optical Engineering
Volume10947
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceNext-Generation Optical Communication: Components, Sub-Systems, and Systems VIII 2019
CountryUnited States
CitySan Francisco
Period4/02/197/02/19

Keywords

  • Light Fidelity
  • OOK modulation scheme
  • SiC photodetectors
  • Traffic control
  • Vehicular Communication
  • Visible Light Communication
  • Vulnerable Road Users
  • White LEDs

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