LoRaWAN communication allows you to create IoT (Internet of Things) solutions across many disciplines. A specific field of application is precision agriculture, which demands this technology mainly due to the fact that it is possible to create low power sensor devices with it. However, in densely populated areas, a lower success rate of message delivery can be observed on some communication channels. For example, this can have an impact on urban agriculture projects. After performing an experiment and analytical–statistical data processing using the Geographic Information System (GIS) tool ArcGIS Insights, it was shown that the success of message delivery on the basic LoRaWAN channel (868.3 MHz) is lower than for the others. Therefore, to ensure higher reliability and thus energy savings, it is appropriate to optimize the use of frequency channels.
The article describes the concept of deploying IoT technologies within the environment of agrarian operations using a system approach with a focus on fuzzy logic. In addition to the introductory acquaintance with IoT and fuzzy theory, the paper focuses on specific possibilities of applying the fuzzy approach, especially in the case of animal husbandry. The main benefit for this field is the fulfillment of welfare principles and the achievement of economic savings based on optimization. The article also showcases a practical implementation of a demonstrative solution in the JavaScript programming language using data from IoT sensors.
The paper deals with using commercial WiFi solutions that provide wireless connection to computer networks to monitor the movement of devices within that network. Current technologies, in particular in the IoT area, make it possible to place a battery sensory device on individual objects used on the farm. These sensors, in addition to their primary ability to provide connectivity, can also be used to monitor the movement of the devices they are attached to. Indirectly, it is therefore possible to monitor the movement of objects, people and animals that are associated with this WiFi or Bluetooth device. An example could be the monitoring of the feed wagon's movement on the farm, while obtaining information about the actual amount of cargo. This allows for optimizing logistics operations or track the movement of employees with fitness bracelets. The aim of the paper is to verify the possibilities of currently available commercial wifi systems and their use for monitoring movement on the farm.
В настоящее время наиболее распространенной технологией беспроводного доступа, которая повсеместно применяется для передачи большого количества трафика различного вида, является стандарт беспроводных локальных сетей IEEE 802.11. Одним из самых перспективных направлений развития технологии стали MESH-сети. MESH-сети предоставляют наиболее интересные решения, интегрирующие различные технологии беспроводного доступа. Возможность организации с помощью MESH-топологии локальных (LAN) и городских (MAN) сетей, легко интегрируемых в глобальные сети (WAN), является положительным фактором для применения на судне. В морской практике все чаще используют системы, основанные на оцифровке и автоматизации, объединенные в сети. В данной статье рассматривается моделирование взаимодействия устройств в MESH-сети на основе спецификации ZigBee, принцип работы канального уровня, который используется в этой сети, а также вариант метода предотвращения повышенного потребления энергии, используемой сети. Одним из преимуществ сети ZigBee является способность отслеживания участников сети и самой топологии в режиме их частых подключений, отключений и переподключений. В этом случае необходимо произвести анализ скорости сети, надежности, пропускной способности. Для данной цели проведены оценка среднего времени ожидания на подключение узла, вероятность успешного подключения узла к сети, вероятность нахождения канала занятым при первом и втором зондировании несущей и тест пропускной способности рассматриваемой сети. Полученные результаты анализа свидетельствуют о работоспособности сети в различных ситуациях: как при обычных условиях, так и в сложной помеховой обстановке. Беспроводная сеть; ZigBee; МЕSH-сеть; CSMA/CA. I.V. Rodygina, V.A. Novak SIMULATION OF WIRELESS MESH NETWORK BASED ON ZigBee SPECIFICATIONCurrently, the most widespread wireless access technology, which is widely used to transmit a large amount of traffic of various types, is the IEEE 802.11 wireless LAN standard. MESH networks have become one of the most promising areas of technology development. MESH networks provide the most interesting solutions integrating various wireless access technologies. The possibility of organizing local (LAN) and metropolitan (MAN) networks using MESH topology, easily integrating into wide area networks (WAN), is a positive factor for use on a ship. In maritime practice, networks based on digitalization and automation are increasingly used. This article discusses modeling the interaction of devices in a MESH network based on the ZigBee specification, the principle of operation of the data link layer, which is used in this network, as well as a variant
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