Coverage Scalability Analysis of Multi-Cell LoRa Networks

On the brink of the internet of things (IoT) revolution, different low power wide area network (LPWAN) technologies are competing for market share and scalability. In this paper we leverage stochastic geometry tools to better understand how one should model the uplink wireless coverage in a multi-cell LoRa network while taking under consideration both the effects of co-spreading factor interference and the spatial diversity afforded by the LoRa network server. To that end, we propose a tractable model that captures these two system peculiarities and mathematically show that gateway densification has an overall positive effect on network coverage thus supporting the scalability of LoRa networks.