Probabilistic analysis and optimization of packet losses in dense LoRa networks

摘要: LoRa is a low-power wide area network technology capable of delivering data over very long distances. Due to its wider range, a LoRa network may be subject to a higher probability of packet collisions when deployed with a large number of end devices. To help LoRa network planners analyze the performance in terms of packet losses, and adjust communication parameters to improve reliability, a proper mathematical model is needed. In this paper, we develop a packet loss model that takes into account individual end devices’ packet arrival rates, transmission powers, and distances from a gateway. The derived model is applied to an optimization problem to find appropriate transmission powers in form of a linear program. Experiments show that packet loss probabilities predicted by the model mostly conform with the results from simulations and the model accurately predicts the aggregated interference …