Results 51 to 60 of about 1,845 (154)

A Low‐Power Wearable IoMT System for Geofencing and Health Monitoring of Care‐Dependent Individuals: Design, Implementation and Field Testing

IET Wireless Sensor Systems, Volume 16, Issue 1, January/December 2026.
This paper presents an IoMT monitoring system for vulnerable individuals, particularly Alzheimer's patients, using a wearable device that combines GNSS positioning, BLE health sensors and LoRa communication to transmit data to the cloud. The cloud application provides geofencing alerts through instant messaging when patients leave safe zones and offers
Daniele Pugliese, Giuseppe Longo, Antonella di Palma, Adnan Rashid, Arcangela Rago, Giancarlo Sciddurlo   +5 more
wiley   +1 more source

IoT-Based Geolocation System Using Sigfox Network for Enhanced Student Safety: Design, Implementation, and Real-World Performance Evaluation

Engineering Proceedings
This paper presents the design, implementation, and validation of an IoT-based geolocation system using the Sigfox network to enhance student safety in urban environments. The proposed system integrates a GPS NEO-6M module with a Ufox Devkit, enclosed in
Edgar Freddy Robalino Peña, Jhon Maldonado, Luis Antonio Flores, Luigi O. Freire, Fabricio Trujillo, Jessica Castillo   +5 more
doaj   +1 more source

Comparison of the Device Lifetime in Wireless Networks for the Internet of Things

IEEE Access, 2017
This paper presents a comparison of the expected lifetime for Internet of Things (IoT) devices operating in several wireless networks: the IEEE 802.15.4/e, Bluetooth low energy (BLE), the IEEE 802.11 power saving mode, the IEEE 802.11ah, and in new ...
Elodie Morin, Mickael Maman, Roberto Guizzetti, Andrzej Duda   +3 more
doaj   +1 more source

A Comprehensive Review of Battery‐Free Energy Efficient RF and Microwave Systems

Journal of Engineering, Volume 2026, Issue 1, 2026.
Battery‐free radiofrequency (RF) and microwave systems have emerged as a promising solution for enabling long‐lifetime, maintenance‐free wireless sensing and communication platforms by eliminating conventional battery dependence. These systems operate by harvesting ambient or dedicated electromagnetic energy, converting it to usable electrical power ...
Stella N. Arinze, Augustine O. Nwajana, Vijayanandh Raja   +2 more
wiley   +1 more source

A Review of the Internet of Things (IoT) Landscape: Technologies, Applications, and Open Challenges

Journal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.
The Internet of Things (IoT) has emerged as a large‐scale ecosystem that integrates sensing, communication, and computation across diverse application domains. Its deployment spans smart homes, wearable devices, industrial automation, and smart cities, where heterogeneous devices are required to operate under strict performance, reliability, and ...
Sidna Jeddou, Luis Diez, Amine Baina, Najid Abdellah, Ramón Agüero, Deepali   +5 more
wiley   +1 more source

A Review of Energy Harvesting Techniques for Low Power Wide Area Networks (LPWANs)

Energies, 2020
The emergence of Internet of Things (IoT) architectures and applications has been the driver for a rapid growth in wireless technologies for the Machine-to-Machine domain.
Giacomo Peruzzi, Alessandro Pozzebon
doaj   +1 more source

Comprehensive Measurement‐Based Assessment of Downlink RF‐EMF Exposure in Urban Environments: Multi‐Method Analysis and Intercomparison

Bioelectromagnetics, Volume 46, Issue 8, December 2025.
ABSTRACT This paper presents a comprehensive measurement‐based assessment of radio‐frequency (RF) electromagnetic field (EMF) exposure level in a French city. Three types of assessment methods are used to collect measurement data: drive test (DT), spot measurements, and sensor networks. The DT measurements were conducted by a portable spectrum analyzer,
Shanshan Wang, Yarui Zhang, Yukun Liu, Jiang Liu, Emmanuelle Conil, Ourouk Jawad, Theodoros Samaras, Lamine Ourak, Joe Wiart   +8 more
wiley   +1 more source

Implementation of an IoT‐Based Livestock Monitoring System Using Mioty Technology

Internet Technology Letters, Volume 8, Issue 6, November/December 2025.
ABSTRACT Environmental monitoring and control in pig farms is fundamental not only for the farmer's economy, but also for animal welfare. The detection and control of basic parameters such as temperature, humidity, and luminosity are crucial for the development, rearing, and weaning of pigs. This paper presents the implementation of a monitoring system
Luis Rubio Fuentes, Andoni Beriain Rodríguez, Yuemin Ding   +2 more
wiley   +1 more source

M‐SADR: Mobile Self Adaptive Data Rate for Enhanced LoRa End‐Device Connectivity on the Move

International Journal of Communication Systems, Volume 38, Issue 15, October 2025.
The proposed M‐SADR method targets mobile LoRa end‐devices and achieves better performance, with a 2.4% improvement in packet delivery ratio and a 5.7% reduction in power consumption per successfully delivered packet. ABSTRACT Mobility is a critical aspect of the Internet of Things, reflecting the diverse and dynamic nature of potential applications ...
Vasileios Moysiadis, Panagiotis Radoglou‐Grammatikis, Evangelos Mourikis, Maria Zevgara, Dimitrios N. Skoutas, Charalabos Skianis, Panagiotis Sarigiannidis   +6 more
wiley   +1 more source

An introduction to Sigfox and LoRa PHY and MAC layers

, 2018
In this paper we present an introduction to Sigfox and LoRa physical and MAC Layers. I. SIGFOX MODULATION A. Sigfox Physical layer Sigfox is based on ultra-narrow band (UNB) physical layer where the binary data are broadcast with a differential binary ...
Ferré, Guillaume, Simon, Eric,
core   +1 more source