Prof. Pedro A. Vieira Profile

Prof. Pedro A. Vieira

at Instituto Superior de Engenharia de Lisboa

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Author

Publications (12)

Proceedings Article | 13 March 2024 Poster + Paper

Leveraging visible light communication for enhanced indoor wayfinding in unfamiliar buildings

P. Louro, M. Vieira, P. Vieira, A. Fantoni, P. Lourenço

Proceedings Volume 12906, 129060N (2024) https://doi.org/10.1117/12.3000462

KEYWORDS: Visible light communication, Buildings, Receivers, Telecommunications, Transmitters, Calibration, Data transmission, Light emitting diodes, Light sources and illumination

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Proceedings Article | 13 March 2024 Poster + Paper

Traffic signals and cooperative trajectories at urban intersections: leveraging visible light communication for implementation

G. Galvão, M. Vieira, P. Vieira, P. Louro, M. Vestias, P. Lourenço

Proceedings Volume 12906, 129060O (2024) https://doi.org/10.1117/12.3000529

KEYWORDS: Visible light communication, Roads, Safety, Telecommunications, Transmitters, Receivers, Education and training, Control systems, Multiplexers, Light emitting diodes

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Proceedings Article | 15 March 2023 Presentation + Paper

Dynamic vehicular visible light communication for traffic management

M Vieira, M. Vieira, P. Vieira, R. Fernandes, P. Louro

Proceedings Volume 12429, 124290O (2023) https://doi.org/10.1117/12.2647866

KEYWORDS: Visible light communication, Telecommunications, Receivers, Multiplexers, Transmitters, Control systems, Light emitting diodes, Data transmission, Roads, Modulation

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Proceedings Article | 15 March 2023 Presentation + Paper

Cooperative guidance system for mobile users inside large buildings based on visible light communication

M. Vieira, P. Vieira, A. Fantoni, P. Louro

Proceedings Volume 12429, 124290Y (2023) https://doi.org/10.1117/12.2647856

KEYWORDS: Visible light communication, Receivers, Multiplexers, Buildings, Data transmission, Transmitters, Telecommunications, Light emitting diodes, Modulation, Error control coding

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Proceedings Article | 14 March 2023 Poster + Paper

Using visible light communication to implement intelligent traffic signals and cooperative trajectories at urban intersections

R. Fernandes, M. Vieira, P. Vieira, P. Louro, Mário Véstias

Proceedings Volume 12441, 124410G (2023) https://doi.org/10.1117/12.2647862

KEYWORDS: Visible light communication, Machine learning, Education and training, Light emitting diodes, Roads, Control systems, Telecommunications, Signals intelligence, Receivers, Intelligence systems

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Proceedings Article | 17 May 2022 Presentation + Paper

Visible light communication cooperative system to support indoor guidance services

Manuela Vieira, Manuel Vieira, Paula Louro, João Rodrigues, Pedro Vieira

Proceedings Volume 12139, 1213903 (2022) https://doi.org/10.1117/12.2621110

KEYWORDS: Receivers, Multiplexers, Buildings, Transmitters, Telecommunications, Modulation, Light emitting diodes, Calibration, Visible radiation, Error control coding

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Proceedings Article | 17 May 2022 Presentation + Paper

Cooperative vehicular visible light communication in smarter split intersections

Manuel Vieira, Manuela Vieira, Paula Louro, Pedro Vieira

Proceedings Volume 12139, 1213905 (2022) https://doi.org/10.1117/12.2621069

KEYWORDS: Receivers, Transmitters, Telecommunications, Roads, Modulation, Safety, Multiplexers, Light emitting diodes, Data communications, Calibration

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This paper addresses the issues related to the Visible Light Communication (VLC) usage in vehicular communication applications. We propose a Visible Light Communication system based on Vehicle-to-Vehicle, Vehicle-to-Infrastructure and Infrastructure-to-Vehicle communications able to safely manage vehicles crossing through an intersection leveraging Edge of Things facilities. By using the streetlamps, street lights and traffic signaling to broadcast information, the connected vehicles interact with one another and with the infrastructure. By using joint transmission, mobile optical receivers collect data at high frame rates, calculate their location for positioning and, concomitantly, read the transmitted data from each transmitter. In parallel with this, an intersection manager coordinates traffic flow and interacts with the vehicles via Driver Agents embedded in them. A communication scenario is stablished and a “mesh/cellular” hybrid network configuration proposed. Data is encoded, modulated and converted into light signals emitted by the transmitters. As receivers and decoders, optical sensors with light filtering properties, are used. Bidirectional communication between the infrastructure and the vehicles is tested. To command the passage of vehicles crossing the intersection safely queue/request/response mechanisms and temporal/space relative pose concepts are used. Results show that the shortrange mesh network ensures a secure communication from street lamp controllers to the edge computer through the neighbor traffic light controller with active cellular connection and enables peer-to-peer communication, to exchange information between V-VLC ready connected cars. The innovative treatments for the congested intersections are related with the introduction of the split intersection. In the split intersection a congested two-way-two-way traffic light controlled intersection was transformed into two lighter intersections which facilitate a smoother flow with less driver delay by reducing the number of vehicle signal phases. Based on the results, the V-VLC system provides direct monitoring of critical points including queue formation and dissipation, relative speed thresholds and inter-vehicle spacing, increasing safety.

Proceedings Article | 4 March 2022 Presentation + Paper

VLC-based geo-localization for automated logistics control using AVGs

P. Louro, J. Rodrigues, M. Vieira, P. Vieira

Proceedings Volume 12027, 120270U (2022) https://doi.org/10.1117/12.2608798

KEYWORDS: Calibration, Light emitting diodes, Navigation systems, Transmitters, Multiplexing, Telecommunications, RGB color model, Modulation, Global Positioning System, Visible radiation

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Proceedings Article | 4 March 2022 Presentation + Paper

Management of split intersections using vehicular visible light communication

M. Vieira, P. Louro, P. Vieira

Proceedings Volume 12022, 120220E (2022) https://doi.org/10.1117/12.2607882

KEYWORDS: Receivers, Telecommunications, Transmitters, Roads, Multiplexers, Modulation, Safety, Light emitting diodes, Calibration, Visible radiation

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Proceedings Article | 18 April 2021 Presentation + Paper

Vehicular visible light communication in a traffic controlled intersection

M. Vieira, P. Louro, P Vieira

Proceedings Volume 11772, 117720K (2021) https://doi.org/10.1117/12.2589494

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Vehicular Communication Systems are a type of network in which vehicles and roadside units are the communicating nodes, providing each other with information, such as safety warnings and traffic information. In this paper, a traffic controlled intersection is analyzed by using microsimulation. A Vehicle-to-Everything (V2X) communication scenario is stablished and a mesh cellular hybrid network configuration is used. The concept of request/response and relative pose estimation for the management of the trajectory is used, in a two-way-two-way traffic lights controlled crossroad, using Vehicular Visible Light Communication (V-VLC). The connected vehicles receive information from the network and interact with each other and with the infrastructure. In parallel, an intersection manager (IM) coordinates the crossroad and interacts with the vehicles (I2V) using the response distance, the pose estimation and the temporal/space relative pose concepts. The communication between the infrastructures and the vehicles (I2V), between vehicles (V2V) and from the vehicles to the infrastructures (V2I) is performed through V-VLC using the street lamps, the traffic signaling and the headlamps 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) optical sensor, with light filtering properties, are used. Cooperative localization is realized in a distributed way with the incorporation of the indirect V2V relative pose estimation method. A phasing traffic flow is developed, as Proof of Concept (PoC), to control the arrival of vehicles to the intersection and schedule them to cross at times that minimize delays, A generic model of cooperative transmission based on the graphical representation of indirect relative poses estimation (simultaneous localization and mapping) is analysed. The block diagram expresses that the vehicle’s behavior (successive poses) is mainly influenced by the manoeuvre permission and presence of other vehicles. Results show that the cooperative I2V and V2V messages and the intersection redesigned layout are important issues on traffic control with least dependency on infrastructure.

Proceedings Article | 18 April 2021 Presentation + Paper

Geo-localization using indoor visible light communication

P. Louro, M. Vieira, P. Vieira, J. Rodrigues, M. de Lima

Proceedings Volume 11772, 117720J (2021) https://doi.org/10.1117/12.2589477

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Proceedings Article | 18 April 2021 Poster + Presentation + Paper

Location and wayfinding services through visible light in crowded buildings

M. Vieira, P. Louro, A. Fantoni, P. Vieira

Proceedings Volume 11772, 117721V (2021) https://doi.org/10.1117/12.2589496

KEYWORDS: Buildings, Visible radiation, Light emitting diodes, Transmitters, Telecommunications, Receivers, Optical sensors, Modulation, 3D modeling, 3D acquisition

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To support people’s wayfinding activities in crowded buildings minimizing the risks of contamination this paper proposes a method able to generate landmark route and alert instructions using Visible Light Communication (VLC). The system is composed of several transmitters (ceiling luminaries) which send the map information, alerts and the path messages required to wayfinding. The system informs the users, in real time, not only of the best route to the desired destination, through a route without clusters of users, but also of crowded places. An architecture based on a mesh cellular hybrid structure was used. Data from the sender 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. The modulated light signal, containing the ID and the 3D geographical position of the transmitter and wayfinding information, is received by a SiC optical sensor with light filtering and demultiplexing properties. Each luminaire for downlink transmission is equipped with one two type of controllers: mesh controller and cellular controllers do forward messages to other devices in the vicinity or to the central manager services. The light signals emitted by the LEDs are interpreted directly by the receivers of the positioned users. Bidirectional communication is tested. The effect of the location of the Access Points (APs) is evaluated and a 3D model for the cellular network is analyzed. In order to convert the floorplan to a 3D geometry, a tandem of layers in an orthogonal topology is used, and a 3D localization design, demonstrated by a prototype implementation, is presented. Uplink transmission is implemented, and the 3D best route to navigate through venue is calculated. Buddy wayfinding services are also considered. The results showed that the dynamic VLC navigation system enables to determine the position of a mobile target inside the network, to infer the travel direction along the time, to interact with received information and to optimize the route towards a static or dynamic destination, avoiding the threat of contamination in crowded regions.

Showing 5 of 12 publications

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