Variable Link Performance Due to Weather Effects in a Long-Range, Low-Power LoRa Sensor Network

When aiming for the wider deployment of low-power sensor networks, the use of sub-GHz frequency bands shows a lot of promise in terms of robustness and minimal power consumption. Yet, when deploying such sensor networks over larger areas, the link quality can be impacted by a host of factors. Therefore, this contribution demonstrates the performance of several links in a real-world, research-oriented sensor network deployed in a (sub)urban environment. Several link characteristics are presented and analysed, exposing frequent signal deterioration and, more rarely, signal strength enhancement along certain long-distance wireless links. A connection is made between received power levels and seasonal weather changes and events. The irregular link performance presented in this paper is found to be genuinely disruptive when pushing sensor-networks to their limits in terms of range and power use. This work aims to give an indication of the severity of these effects in order to enable the design of truly reliable sensor networks.

Automated summary

The use of sub-GHz frequency bands in low-power sensor networks offers potential stability and energy efficiency advantages, but link quality may be affected by various factors when deployed over large areas, including signal deterioration and seasonal weather changes. The instability of signal link performance may pose challenges when pushing the limits of sensor network range and power consumption.