부산대학교 도서관

This paper proposes an effective method of IoT solution using nanosatellite communication for remote monitoring of electrical substations. The method deploys a smart IoT LoRa terminal called a node. It records the collected data from sensors and transmits it using LoRa (Long Range) adaptive data packets to the LEO (Low Earth Orbit) satellite at specific time intervals depending on the satellite time of visibility and access duration. The implementation of the LoRa Technology in this application allows peer to peer communication between the nodes and the nanosatellite. However, there are some limitations with LoRa and LEO satellite communication. The solution to these limitations has been demonstrated using modelling and simulation methodology. The proposed method improves the IoT-based nanosatellite remote monitoring of electrical sub-stations by mitigating the impact of the limitations. Furthermore, the study shows the nanosatellite view in 2D, 3D, and the target substation's access time by varying its altitude, azimuth, and elevation angles.