Experimental Study on Optimization of Frame Length for LPWA Mobile Communication Environment [PDF]
920MHz帯を使用するLow-power Wide-area (LPWA)通信は，手軽に設置することができ，長距離通信が行えるツールとして，広く普及している．移動環境へのLPWA通信の適用に関しては，LPWA通信の多くは無線フレーム長が数10ミリ秒以上となることも多く，長いエアタイムとなることから移動に伴って変動するフェージングの影響を受けることになる．このことから，ペイロード長に依存するエアタイムと通信成功率との間には関連性があり ...
50284716 +22 more
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Design and Implementation of the Lucent Personalized Web Assistant (LPWA)
, 1998 This paper describes the design and implementation of the Lucent Personalized Web Assistant (LPWA). LPWA is a software system that enables a user to browse the Web in a personalized, simple, private, and secure fashion and to filter junk e-mail (spam ...
Phillip B. Gibbons +4 more
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Low-Power LoRa Signal-Based Outdoor Positioning Using Fingerprint Algorithm
ISPRS International Journal of Geo-Information, 2018 Positioning is an essential element in most Internet of Things (IoT) applications. Global Positioning System (GPS) chips have high cost and power consumption, making it unsuitable for long-range (LoRa) and low-power IoT devices.
Wongeun Choi +3 more
doaj +1 more source
Capturing coefficient increase and energy spread decrease in LPWA
Journal of Physics: Conference Series, 2016 The acceleration of electrons in laser plasma channels is one of the contemporary ideas on energy frontier of accelerators. Many simulations and experimental studies are now provided. But two main laser plasma acceleration problems are not solved until now: low fraction of particles is capturing into acceleration and accelerated electrons have very ...
S M Polozov, V I Rashchikov
openaire +1 more source
Recognition of security issues in LPWA type networks
, 2020 The bachelor’s thesis deals with the issue of recognizing security incidents in LPWA (LowPower Wide Area) networks. Thesis contains information about the most used LPWA technologies, examines their security architecture and possible threats.
Shestopalov, Artur
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Etude expérimentale de la couverture d’un réseau LoRaWAN
, 2021 Etude expérimentale de la couverture d’un réseau LoRaWAN : journées ...
van den Bossche, Adrien +3 more
core +1 more source
Une fédération de réseaux LoRa pour la recherche et l'enseignement
, 2021 Une fédération de réseaux LoRa pour la recherche et l'enseignement : journées ...
Val, Thierry +7 more
core +2 more sources
Q-Learning Aided Resource Allocation and Environment Recognition in LoRaWAN With CSMA/CA
IEEE Access, 2019 The mutual interference among wireless nodes is a critical factor in the Internet-of-Things (IoT) era due to its dense deployment. Due to its large coverage area, wireless nodes may not be able to detect the on-going communication of other nodes in a ...
Naoki Aihara +4 more
doaj +1 more source
A Secure IoT-Based Irrigation System for Precision Agriculture Using the Expeditious Cipher. [PDF]
Sensors (Basel), 2023 Fathy C, Ali HM.
europepmc +1 more source
Spectrum Sharing for LPWA Under Intra-system and Inter-system Interference Constraints [PDF]
, 2023 電気通信大学修士2022近年，省電力長距離通信を可能とするLPWA (Low Power Wide Area)端末数が急増しており，周波数資源の枯渇が懸念されている．一方，利用用途に応じて通信プロトコルの異なるLPWAシステムが数多く開発されており，これらは免許不要な同一のSub-GHz帯(日本では920[MHz]帯)を利用している．加えて，LPWA端末の多くは観測情報をゲートウェイ (GW:Gateway)に上り通信する際，周波数資源の混雑度を鑑みずに送信時刻や周波数チャネル(以下，チャネルと呼称 ...
カクダ, シンイチロウ +1 more
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