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    Wyświetlanie 1-7 z 7
    Tytuł:
    Simulations of the MAC Layer in the LoRaWAN Networks
    Autorzy:
    Piechowiak, Maciej
    Zwierzykowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/307678.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Internet of Things
    LoRa
    LoRaWAN
    LPWAN
    simulations
    Opis:
    The Internet of Things is changing the approach to data transmission, protocol design and network services. The challenge faced by designers of IoT solutions is to determine the scalability of a given technology, with a particular emphasis placed on unlicensed frequency bandwidth (ISM) transmission in highly urbanized areas. Because the design and implementation of a wireless network for the Internet of Things, relying on each of the presented technologies, is expensive and time consuming, it must be preceded by a performance assessment based on computer simulations. The literature contains various approaches to modeling the mechanisms of the MAC layer of LoRa technology and to its implementation in LoRaWAN networks. The article provides an overview of major LoRa MAC network simulators. It presents and comments on the most important research results obtained by the authors of the aforementioned software.
    Źródło:
    Journal of Telecommunications and Information Technology; 2020, 2; 22-27
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptation of Propagation Models to Improve the Coverage Range Prediction of LoRaWAN Technology at 915 MHz in an Urban Environment
    Autorzy:
    Suarez-Suare, Carlos René
    Rueda, Diego F
    Timaná-Eraso, Luis Carlo
    Leon-Leon, Jose
    Powiązania:
    https://bibliotekanauki.pl/articles/27311960.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    LoRaWAN
    propagation models
    Internet of things
    urban coverage
    fitted model
    Opis:
    Long Range Wide Area Network (LoRaWAN) technology has established new concepts for long-range wireless communication, being widely used in the implementation of IoT solutions. Therefore, it is crucial to validate the coverage of the signal and to know the distance at which a LoRAWAN communication system can be connected. This document investigates LoRaWAN technology for cases based on urban environments, so it can be used as a guide for those projects that require predicting the connection distance range of a LoRaWAN link. In addition, it serves as a tool for the reader when it comes to predicting the coverage of Long-Range Wide Area Network (LoRaWAN) technology. Measurements were made in a LoRaWAN network deployed in urban environments, where RSSI measurements were made in the city of Bogotá D.C., Colombia. Experimentally RSSI values were compared with four different propagation models at a frequency of 915 MHz in urban environments. The contribution of this work is an adjustment to widely used prediction models, according to the recommendation of the International Telecommunications Union (ITU) ITU-R P.1546, which allows estimating coverage in scenarios with characteristics similar to Bogotá D.C. This allows to know with precision the coverage before implementing the LoRaWAN communications system at 915 MHz. The results of comparing field measurements with fitted propagation models show that the Okumura model is the best predictor of coverage with a minimum error rate.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 4; 733--744
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Suitability of LoRaWAN Technology for the development of maritime applications
    Autorzy:
    Wiszniewski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1955265.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska
    Tematy:
    Internet of Things
    LoRaWAN
    long range telecomunication
    maritime enviroment monitoring
    Opis:
    The LoRaWAN Technology opens new possibilities for gathering and analysis of distributed data. In the paper we concentrate on its maritime usability which was tested byus in the period from June to August 2018. Measurements of the LoRaWAN network coveragein the Bay of Gdansk area were carried out. Various conditions and places were tested. There search was planned in such a way as to gradually increase the range and control the impact of environmental factors. The results of the measurements confirm the wide application and a broad range of the technology. Combined with cloud computing it leads to new kinds of services and applications.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2018, 22, 4; 333--340
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The System of Remote Monitoring of Microclimate Parameters of Bee Colonies
    Autorzy:
    Gabitov, Ildar
    Linenko, Andrey
    Yumaguzhin, Fitrat
    Akchurin, Salavat
    Valishin, Denis
    Powiązania:
    https://bibliotekanauki.pl/articles/2025481.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    digitalization
    honey
    Internet of things
    LoRaWAN
    microclimate
    monitoring
    wild beekeeping
    Opis:
    Accurate and timely measures to preserve the native populations of the wild honey bees need a study on the influence of housing conditions and environmental factors on the quality, productivity and viability of bee colonies. The authors have developed a system for remote monitoring of microclimate parameters of wild bee colonies based on the latest LoRaWAN technology. For studying the monitoring system based on the selected data transmission technology, data collection and transmission devices are implemented in two variants – based on ready-made monoblock devices (Variant 1) and composite devices (Variant 2) based on the Atmega328P microcontroller and photovoltaic power supply system with digital temperature and humidity sensors. Field tests of an experimental remote monitoring system were carried out in actual working conditions without power supply and communication systems. The tests involved 15 monoblock ready-made RAK7204 devices (Variant 1) and nine composite devices (Variant 2) based on the Atmega328P microcontroller. After the tests, Variant 1 was excluded from further use in research due to mass failure. Variant 2 passed the tests and participated in further research. The parameters of the power supply system of measuring devices and gateways are analyzed. The results of year-round monitoring of microclimate parameters of bee colonies were obtained. The study results prove the efficiency of the monitoring system based on LoRaWAN technology with the Atmega328P microcontroller devices and its operation comfort. During the study, it was recorded that the outer air temperature dropped to -36 °C. During the same period, the internal temperature significantly exceeded the air temperature. Besides, the highest temperature in wild hives during the winter months reaches +15 °C and +35.5 °C in the summer months. The temperature difference recorded in winter between the air inside wild hives and outer air reaches Δ30 °С.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 1; 264-273
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Wireless Data Transmission Protocols for Residential Water Meter Applications
    Autorzy:
    Krzak, Łukasz
    Macheta, Jan
    Kubaszek, Mateusz
    Worek, Cezary
    Powiązania:
    https://bibliotekanauki.pl/articles/27311961.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    water meter
    protocols
    Wireless M-Bus
    LoRaWAN
    Sigfox
    NB-IoT
    energy consumption
    maximum coupling loss
    Opis:
    This article provides a comparison of various wireless data transmission protocols, such as Wireless M-Bus, Lo- RaWAN, Sigfox, NB-IoT and a newly developed proprietary protocol, studying their performance in the application of batterypowered residential water meters. Key aspects of the comparison include energy consumption, which is analyzed through comparing unitary amount of charge required to conduct a single, bidirectional data transaction between the meter and base station, and maximum coupling loss which effectively defines the range and coverage in the system. For completeness, the study includes also a brief cost analysis and ends with a conclusion, stating when each of the particular standards should be favored.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 4; 833--842
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measuring Light Pollution in the Night Sky – From Technology Demonstrator to Monitoring System
    Autorzy:
    Karpińska, Dominika
    Kunz, Mieczysław
    Powiązania:
    https://bibliotekanauki.pl/articles/27314839.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    light pollution
    automatic measurement
    LoRaWAN
    Smart City
    Industry 4.0
    monitoring system
    zanieczyszczenie światłem
    pomiar automatyczny
    Inteligentne miasto
    Przemysł 4.0
    system monitorujący
    Opis:
    Pollution of the night sky by artificial light has now become an important element of the modern city landscape. The decline in the quality of the sky observed at night in urban areas has already been noticed even by residents unaware of its origin. A starry sky is nowadays not easy to observe even in places far from large conurbations or smaller cities. More and more places are losing access to the previously natural privilege of observing the dark sky, and their inhabitants are thus systematically exposed to all the direct and indirect negative effects of this phenomenon. Monitoring the brightness of the night sky is gaining interest from a growing number of interdisciplinary research groups being established around the world, including Poland. In Toruń, the first measurements of the magnitude of this phenomenon, together with the determination of its spatial scale, were started using handheld devices in 2017. In the following years, efforts were made to improve the data acquisition process by creating a prototype – a technology demonstrator and, consequently, a commercial version of an automatic device measuring the surface brightness of the night sky. This paper presents the stages of the project aimed at developing a light pollution monitoring system, which has been consistently implemented in Toruń. The most important component of this system is a measuring device of our own design and construction. The monitoring system designed and operating in Toruń, starting in 2019, is being further developed with new components and monitoring (measurement) sites being systematically added, making the city’s observation network increasingly dense. The devices built using the LoRa standard for wireless data exchange implement the concept of the Internet of Things, fitting in with the objectives of a smart city.
    Źródło:
    Civil and Environmental Engineering Reports; 2023, 33, 1; 53--70 poz.
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Open extensive IoT research and measurement infrastructure for remote collection and automatic analysis of environmental data
    Autorzy:
    Wiszniewski, Ł.
    Klimowicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1940556.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska
    Tematy:
    Internet of Things
    LoRaWAN
    data gathering
    data visualization
    unmanned air vehicles
    LPWAN Network
    Long Range Data Transmission
    internet rzeczy
    gromadzenie danych
    wizualizacja danych
    bezzałogowe pojazdy powietrzne
    sieć LPWAN
    transmisja danych dalekiego zasięgu
    Opis:
    Internet of Things devices that send small amounts of data do not need high bit rates as it is the range that is more crucial for them. The use of popular, unlicensed 2.4 GHz and 5 GHz bands is fairly legally enforced (transmission power above power limits cannot be increased). In addition, waves of this length are very difficult to propagate under field conditions ( e.g. in urban areas). The market response to these needs are the LPWAN (Low Power WAN) type networks, whose main features are far-reaching wireless coverage and low power measurement end-nodes that can be battery powered for months. One of the promising LPWAN technologies is the LoRa WAN, which uses a publicly available 868 MHz band (in Europe) and has a range of up to 20 km. This article presents how the LoRa WAN network works and describes the installation of the research and measurement infrastructure in this technology which was built in the Gdańsk area using the Academic Computer Center TASK network infrastructure. The methodology and results of the qualitative and performance studies of the constructed network with the use of unmanned aircraft equipped with measuring devices for remote collection of environmental data are also presented. The LoRaWAN TASK has been designed to support the development of other research projects as an access infrastructure for a variety of devices. Registered users can attach their own devices that send specific metrics that are then collected in a cloud-based database, analyzed and visualized.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2017, 21, 4; 355-363
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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