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Intelligent traffic control strategies for VLC-connected vehicles and pedestria...
Galvão, Gonçalo; Vieira, Manuela; Vieira, Manuel Augusto; Véstias, Mário; Louro, PaulaUrban traffic congestion leads to daily delays, driven by outdated, rigid control systems. As vehicle numbers grow, fixed-phase signals struggle to adapt to real-time conditions. This work presents a decentralized Multi-Agent Reinforcement Learning (MARL) system to manage a traffic cell composed of five intersections, introducing the novel Strategic Anti-Blocking Phase Adjustment (SAPA) module, developed to ena...
Decentralized Multi-Agent Reinforcement Learning with Visible Light Communicati...
Vieira, Manuel Augusto; Galvão, Gonçalo; Vieira, Manuela; Véstias, Mário; Louro, Paula; Vieira, PedroThe rapid growth of urban vehicle and pedestrian flows has intensified congestion, delays, and safety concerns, underscoring the need for sustainable and intelligent traffic management in modern cities. Traditional centralized traffic signal control systems often face challenges of scalability, heterogeneity of traffic patterns, and limited real-time adaptability. To address these limitations, this study propos...
Enhanced SUMO–VLC Framework for Real-time Vehicular Communication and Validation
Louro, Paula; Galvão, Gonçalo; Gaspar, Afonso; Dragovic, João; Marques, João; Vieira, Manuela; Vieira, Manuel AugustoThis work explores the integration of visible light communication technology with urban traffic management systems. Using RGBV LEDs, Visible Light Communication facilitates real-time data collection – such as vehicle position, speed, queue length, and waiting time – through transmitters embedded in streetlights, traffic signals, and vehicle headlights. These enable multiple communication modes: vehicle-to-vehic...
Integration of visible light communication, artificial intelligence, and rerout...
Vieira, Manuela; Galvão, Gonçalo; Vieira, Manuel Augusto; Véstias, Mário; Vieira, Pedro; Louro, PaulaThis study combines Visible Light Communication (VLC) and Artificial Intelligence (AI) to enhance traffic signal control, reduce congestion, and improve safety, through real-time monitoring and dynamic traffic management. Leveraging VLC technology, the system uses existing road infrastructure to transmit live data on vehicle and pedestrian positions, speeds, and queues. AI agents, employing Deep Reinforcement L...
VLC-based geo-localization for automated logistics control using AVGs
Louro, Paula; Rodrigues, João; Vieira, Manuela; Vieira, Manuel Augusto; Vieira, PedroIncreasing interest in indoor navigation has recently been generated by devices with wireless communication capabilities that enabled a wide range of applications and services. The rise of the Internet of Things (IoT) and the inherent end-to end connectivity of billions of devices is very attractive for indoor localization and proximity detection. Other fields, such as, marketing and customer assistance, health...
Cooperative vehicular visible light communication in smarter split intersections
Vieira, Manuel Augusto; Vieira, Manuela; Louro, Paula; Vieira, PedroThis 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 lig...
Management of split intersections using vehicular visible light communication
Vieira, Manuel Augusto; Vieira, Manuela; Louro, Paula; Vieira, PedroVehicle Communication Systems consist of vehicles and roadside units that communicate with one another in order to exchange information, such as traffic information and safety warnings. Split intersections are an innovative solution for congested urban areas. In this case, a congested two-way-two-way intersection is made into two lighter intersections. It facilitates a smoother flow with less driver delay, by r...
Cooperative self-localization and wayfinding services through visible light com...
Vieira, Manuela; Vieira, Manuel Augusto; Louro, Paula; Fantoni, Alessandro; Vieira, PedroA Visible Light Communication (VLC) cooperative system that supports guidance services and uses an edge/fog based architecture for wayfinding services is presented. The integrated dynamic navigation system consists of multiple transmitters (luminaries) which transmit the map information and path messages necessary for wayfinding. The luminaires used for downlink transmission are equipped with one of two types o...
Visible light communication cooperative system to support indoor guidance services
Vieira, Manuela; Vieira, Manuel Augusto; Louro, Paula; Rodrigues, João; Vieira, PedroTo support people’s wayfinding activities we propose a Visible Light Communication (VLC) cooperative system that supports guidance services and uses an edge/fog based architecture for wayfinding services. A mesh cellular hybrid structure is proposed. The dynamic navigation system is composed of several transmitters (ceiling luminaries) which send the map information and path messages required to wayfinding. The...
Decoding techniques for indoors navigation using VLC
Louro, Paula; Vieira, Manuela; Vieira, Manuel AugustoIn recent years, devices with wireless communication capabilities have generated a growing interest in indoor navigation. Indoor localization and proximity detection is becoming increasingly attractive due to the emergence of the Internet of Things (IoT) and the inherent end-to-end connectivity of billions of devices. In a closed space, GPS has poor, unreliable performance, requiring alternative techniques and ...