Empirical indoor propagation models for LoRa radio link in an office environment

LoRa (Long Range) is one of the most promising candidate technology for Internet of Things (IoT). It supports a high number of communication devices spread across large areas. In this paper, we present some indoor measurements performed in a standard office environment using LoRa links. The aims of the work is to assess the indoor propagation performance of LoRa technology and to indicate the best model to be used for a preliminary design of a LoRa based radio link in an office environment. The measured data highlights that LoRa technology can be used in office environment to realize a wireless sensor network. Five commonly used propagation models were also analyzed and their results compared with the measurements. This analysis highlighted that the Motley-Keenan's is the best model to describe indoor propagation.