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Sobre

Sobre

Helder Fontes obteve os graus de Mestrado em 2010 e Doutoramento em 2019, ambos em Engenharia Informática na Faculdade de Engenharia da Universidade do Porto, Portugal. Ele é o coordenador da área de Redes Sem Fios no INESC TEC, e desde 2009 participou em vários projetos de investigação nacionais e Europeus, incluindo o SITMe, HiperWireless, FP7 SUNNY, H2020 ResponDrone, DECARBONIZE, FLY.PT e ainda projetos Open Call do FED4FIRE+ como o SIMBED, SIMBED+ e SMART. Ele supervisionou mais de 10 teses de Mestrado em simulação, emulação e experimentação de redes sem fios. Os seus interesses de investigação incluem a simulação, emulação e experimentação de redes sem fios no contexto de cenários emergentes tais como o aéreo e o marítimo, com especial foco na repetibilidade e reproducibilidade de experiências usando digital twins de testbeds sem fios.

Tópicos
de interesse
Detalhes

Detalhes

  • Nome

    Hélder Martins Fontes
  • Cargo

    Responsável de Área
  • Desde

    15 setembro 2009
019
Publicações

2025

Short-Range Energy-Aware Optical Wireless Communications Module for Ns-3

Autores
Ribeiro, T; Silva, S; Loureiro, JP; Almeida, EN; Almeida, NT; Fontes, H;

Publicação
Joint European Conference on Networks and Communications & 6G Summit, EuCNC/6G Summit 2025, Poznan, Poland, June 3-6, 2025

Abstract
Optical Wireless Communications (OWC) has recently emerged as a viable alternative to radio-frequency technology, especially for the Internet of Things (IoT) domain. However, current simulation tools primarily focus on physical layer modelling, ignoring network-level issues and energy-constrained environments. This paper presents an energy-aware OWC module for ns-3 that addresses these limitations. The module includes specific PHY and MAC layers and integrates an energy model, a mobility model, and models of monochromatic transceivers and photodetectors, supporting both visible light and infrared (IR) communications. Verification against MATLAB simulations confirms the accuracy of our implementation. Additionally, mobility tests demonstrate that an energy-restricted end device transmitting via IR can maintain a stable connection with a gateway at distances up to 2.5 m, provided the SNR is above 10 dB. These results confirm the capabilities of our module and its potential to facilitate the development of energy-efficient OWC-based IoT systems. © 2025 IEEE.

2025

An Energy-Aware RIoT System: Analysis, Modeling and Prediction in the SUPERIOT Framework

Autores
Bocus, MJ; Hakkinen, J; Fontes, H; Drzewiecki, M; Qiu, S; Eder, K; Piechocki, RJ;

Publicação
CoRR

Abstract

2025

Context-aware Rate Adaptation for Predictive Flying Networks using Contextual Bandits

Autores
Queirós, R; Kaneko, M; Fontes, H; Campos, R;

Publicação
CoRR

Abstract

2025

Context-Aware Rate Adaptation for Predictable Flying Networks using Contextual Bandits

Autores
Queiros, R; Kaneko, M; Fontes, H; Campos, R;

Publicação
IEEE Networking Letters

Abstract
The increasing complexity of wireless technologies, such as Wi-Fi, presents significant challenges for Rate Adaptation (RA) due to the large configuration space of transmission parameters. While extensive research has been conducted on RA for low-mobility networks, existing solutions fail to adapt in Flying Networks (FNs), where high mobility and dynamic wireless conditions introduce additional uncertainty. We propose Linear Upper Confidence Bound for RA (LinRA), a novel Contextual Bandit-based approach that leverages real-Time link context to optimize transmission rates in predictable FNs, where future trajectories are known. Simulation results demonstrate that LinRA converges 5.2× faster than benchmarks and improves throughput by 80% in Non Line-of-Sight conditions, matching the performance of ideal algorithms. © 2025 Elsevier B.V., All rights reserved.

2024

Towards truly sustainable IoT systems: the SUPERIOT project

Autores
Katz, M; Paso, T; Mikhaylov, K; Pessoa, L; Fontes, H; Hakola, L; Leppaeniemi, J; Carlos, E; Dolmans, G; Rufo, J; Drzewiecki, M; Sallouha, H; Napier, B; Branquinho, A; Eder, K;

Publicação
JOURNAL OF PHYSICS-PHOTONICS

Abstract
This paper provides an overview of the SUPERIOT project, an EU SNS JU (Smart Networks and Services Joint Undertaking) initiative focused on developing truly sustainable IoT systems. The SUPERIOT concept is based on a unique holistic approach to sustainability, proactively developing sustainable solutions considering the design, implementation, usage and disposal/reuse stages. The concept exploits radio and optical technologies to provide dual-mode wireless connectivity and dual-mode energy harvesting as well as dual-mode IoT node positioning. The implementation of the IoT nodes or devices will maximize the use of sustainable printed electronics technologies, including printed components, conductive inks and substrates. The paper describes the SUPERIOT concept, covering the key technical approaches to be used, promising scenarios and applications, project goals and demonstrators which will be developed to the proof-of-concept stage. In addition, the paper briefly discusses some important visions on how this technology may be further developed in the future.

Teses
supervisionadas

2023

A Machine Learning-aided Wireless Network Digital Twin using Multimodal Input Data

Autor
Ricardo Jorge Espirito Santo Trancoso

Instituição

2023

Reinforcement Learning-Based Positioning Algorithm for Relay Nodes in Aerial Networks

Autor
Gabriella Fernandes Pantaleão

Instituição

2023

Data-driven Traffic Generation Model for Network Digital Twins

Autor
Catarina Mouro de Sousa

Instituição

2023

On the Impact of Computational Delays in RL-based Rate Adaptation Algorithms

Autor
João Paulo Ferreira Pinto

Instituição

2023

Digital Twin of Reconfigurable Printed IoT Nodes using ns-3

Autor
Tiago da Silva Ribeiro

Instituição