Maria João Nicolau

ORCID: 0000-0001-6172-5855
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About
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Research Areas
  • Vehicular Ad Hoc Networks (VANETs)
  • Network Traffic and Congestion Control
  • Opportunistic and Delay-Tolerant Networks
  • Mobile Ad Hoc Networks
  • Indoor and Outdoor Localization Technologies
  • Caching and Content Delivery
  • IPv6, Mobility, Handover, Networks, Security
  • Autonomous Vehicle Technology and Safety
  • Software-Defined Networks and 5G
  • Wireless Networks and Protocols
  • Wireless Communication Networks Research
  • Traffic control and management
  • Mobile Agent-Based Network Management
  • Traffic Prediction and Management Techniques
  • Millimeter-Wave Propagation and Modeling
  • Network Security and Intrusion Detection
  • Underwater Vehicles and Communication Systems
  • Context-Aware Activity Recognition Systems
  • Mobile Crowdsensing and Crowdsourcing
  • Energy Efficient Wireless Sensor Networks
  • Advanced MIMO Systems Optimization
  • Advanced Optical Network Technologies
  • GNSS positioning and interference
  • Peer-to-Peer Network Technologies
  • RFID technology advancements

University of Minho
2015-2024

University of Trento
2020

Every year, for ten years now, the IPIN competition has aimed at evaluating real-world indoor localisation systems by testing them in a realistic environment, with movement, using EvAAL framework. The provided unique overview of state-of-the-art systems, technologies, and methods positioning navigation purposes. Through fair comparison performance achieved each system, was able to identify most promising approaches pinpoint critical working conditions. In 2020, included 5 diverse off-site...

10.1109/jsen.2021.3083149 article EN cc-by IEEE Sensors Journal 2021-05-24

Research and development around indoor positioning navigation is capturing the attention of an increasing number research groups labs world. Among several techniques being proposed for positioning, solutions based on Wi-Fi fingerprinting are most popular since they exploit existing WLAN infrastructures to support software-only tracking applications. Despite enormous efforts in this domain, despite existence some commercial products fingerprinting, it still difficult compare performance, real...

10.1109/ipin.2015.7346967 article EN 2015-10-01

Internet of Things combined with Radio Frequency IDentification technology enable a whole new context for smart objects that are able to combine their physical and virtual existences. IDentification, putting an identification label into every object, enables system get information, either real-time or virtual-linked without any contact. Information retrieved from such turns it potential certainly auto identify itself and, if security problems suitably treated, most probably connect the...

10.1016/j.protcy.2014.10.152 article EN Procedia Technology 2014-01-01

This paper presents the analysis and discussion of off-site localization competition track, which took place during Seventh International Conference on Indoor Positioning Navigation (IPIN 2016). Five international teams proposed different strategies for smartphone-based indoor positioning using same reference data. The competitors were provided with several smartphone-collected signal datasets, some used training (known trajectories), others evaluating (unknown trajectories). permits a...

10.3390/s17030557 article EN cc-by Sensors 2017-03-10

The development of indoor positioning solutions using smartphones is a growing activity with an enormous potential for everyday life and professional applications. research activities on this topic concentrate the new that are tested in specific environments under their own evaluation metrics. To explore real quality smartphone-based capabilities seamlessly adapting to different scenarios, it needed find fair frameworks. design competitions extensive pre-recorded datasets valid way generate...

10.3390/s18020487 article EN cc-by Sensors 2018-02-06

IPIN 2019 Competition, sixth in a series of competitions, was held at the CNR Research Area Pisa (IT), integrated into program Conference. It included two on-site real-time Tracks and three off-site Tracks. The four presented this paper were set same environment, made buildings close together for total usable area 1000 m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> outdoors 6000 indoors over floors, with path length exceeding 500 m....

10.1109/access.2020.3037221 article EN cc-by IEEE Access 2020-01-01

The rapid development of 5G networks and the anticipation 6G technologies have ushered in an era highly customizable network environments facilitated by innovative concept slicing. This technology allows creation multiple virtual on same physical infrastructure, each optimized for specific service requirements. Despite its numerous benefits, slicing introduces significant security vulnerabilities that must be addressed to prevent exploitation increasingly sophisticated cyber threats. review...

10.3390/fi16070226 article EN cc-by Future Internet 2024-06-27

This paper presents results from comparing different Wi-Fi fingerprinting algorithms on the same private dataset. The where realized by independent teams in frame of off-site track EvAAL–ETRI Indoor Localization Competition which was part Sixth International Confere nce Positioning and Navigation (IPIN 2015). Competitors designed validated their against publicly available UJIIndoorLoc database contains a huge reference- validation data set. All competing systems were evaluated using mean...

10.3233/ais-170421 article EN Journal of Ambient Intelligence and Smart Environments 2017-02-21

Intelligent Transportation Systems (ITSs) are systems that aim to provide innovative services for road users in order improve traffic efficiency, mobility and safety. This aspect of safety is utmost importance Vulnerable Road Users (VRUs), as these typically more exposed dangerous situations, their vehicles also possess poorer mechanisms when comparison regular on the road. Implementing automatic solutions VRU challenging since they have high agility it can be difficult anticipate behavior....

10.3390/s23031260 article EN cc-by Sensors 2023-01-22

The use of Radio Frequency Identification technology (RFID) in medical context enables not only drug identification, but also a rapid and precise identification patients, physicians, nurses or any other health caregiver. combination RFID tag with structured secured Internet Things (IoT) solutions ubiquitous easy access to related records, while providing control security all interactions. This paper defines basic architecture, easily deployable on mobile platforms, which would allow...

10.1109/softcom.2013.6671901 article EN 2013-09-01

The accuracy of fingerprinting-based positioning methods is limited by the fluctuations in radio signal intensity mainly due to reflections, refractions, and multipath interference, among other factors. We consider that (often modelled as a Gaussian process for simplification purposes) can be minimized exploiting richness multiple signals collected simultaneously through independent network interfaces. This paper introduces an analysis Wi-Fi signals' statistics using simultaneous...

10.1109/ipin.2017.8115914 article EN 2017-09-01

Vehicular Ad hoc Networks (VANETs) are the underlying network for all communications between Intelligent Transportation System entities as, example, Road Side Units, On-Board etc. These networks growing in size and interest from automaker's industry, software companies scientific researchers. The intrinsic technological nature of VANETs (based on a wireless shared medium) with no predefined structure architecture (high mobility their users) makes them very susceptible to security attacks,...

10.1109/globecom42002.2020.9348149 article EN GLOBECOM 2022 - 2022 IEEE Global Communications Conference 2020-12-01

Achieving reliable connectivity in heterogeneous vehicular networks is a challenging task, owing to rapid topological changes and unpredictable vehicle speeds. As communication demands continue evolve, multipath emerging as an important tool, which promises enhance network interoperability reliability. Given the limited coverage area of serving access technologies, frequent disconnections are be expected moves. To ensure seamless dynamic environments, intelligent path management algorithm...

10.1016/j.vehcom.2023.100690 article EN cc-by Vehicular Communications 2023-11-20

A Vehicular Adhoc Network (VANET) is a generic communications conceptualization that can be applied to Intelligent Transportation Systems (ITS) and its main goal allow exchange of information between moving vehicles, fixed infrastructures, pedestrians with personal devices, all other electronic devices able connect VANET environment. Information different stakeholders brings relevant potential the development applications help users in areas such as traffic safety efficiency, infotainment...

10.1016/j.procs.2017.06.101 article EN Procedia Computer Science 2017-01-01

10.1109/iwcmc61514.2024.10592547 article EN 2022 International Wireless Communications and Mobile Computing (IWCMC) 2024-05-27

Platooning is an emerging Intelligent Transportation Systems (ITS) application that can have a huge impact on road traffic. It allows vehicles to travel in convoy manner, very close each other with constant speeds and gaps.

10.1145/3267129.3267146 article EN 2018-10-25

It is expected in a near future that safety applications based on vehicle-to-everything communications will be common reality the traffic roads. This technology contribute to improve of vulnerable road users, for example, with use virtual light systems (VTLS) intersections. work implements and evaluates VTLS conceived help pedestrians pass safely intersections without real lights. The simulated scenario used two distinct communication paradigms—the pull push models. model was implemented...

10.3390/info11110510 article EN cc-by Information 2020-10-30

Tracking the position of people or vehicles in large indoor settings with high accuracy is still a challenge despite significant progress observed positioning technology last decade. To date, there not clearly dominant solution for general use, and challenges related to seamless indoor-outdoor positioning, reliable floor estimation maps are needing more research. In this context, IPIN 2016 conference promoting competition evaluate set competing solutions realistic scenario. This paper...

10.1109/ipin.2016.7743705 article EN 2016-10-01

Wi-Fi fingerprinting is a popular technique for smartphone-based indoor positioning. However, well-known RF propagation issues create signal fluctuations that translate into large positioning errors. Large errors limit the usage of in industrial environments, where reliability position estimates key requirement. One successful approach to deal with average signals collected simultaneously through independent interfaces. Another provided by models built on radio maps. This paper explores...

10.1109/ipin.2019.8911758 article EN 2019-09-01

As technology advances on the field of Vehicular Ad hoc Networks (VANETs), there is a growing concern within research community regarding safety Vulnerable Road Users (VRUs). These entities play an important role in traffic, but their typical agility and difficult to predict behavior pose challenges development automatic systems that aim protect them. The application Machine Learning (ML) techniques top communication data can be collected from road environment has potential VRUs movement,...

10.1109/icufn55119.2022.9829567 article EN 2022 Thirteenth International Conference on Ubiquitous and Future Networks (ICUFN) 2022-07-05

This paper proposes a reliable step counting system for pedestrians based on pattern recognition, more specifically, autocorrelation. It uses the accelerometer signal obtained through sensor that is usually present in almost all smartphones and was designed to be easily integrated as component an Indoor Positioning System. The has been thoroughly tested using specific planned scenarios always with than one hundred steps. ground truth carefully by real number of same path travelled many...

10.1109/ipin.2019.8911755 article EN 2019-09-01
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