NB-Fi is a new low-power wide-area network technology, which has become widely used for smart cities, smart grids, the Industrial Internet of Things, and telemetry applications. Although many countries use NB-Fi, almost no papers study NB-Fi, and its peak performance is unknown. This article aims to fill this gap by analyzing this technology and studying the problem of rate assignment in NB-Fi networks. For that, this article develops a mathematical model used to find the packet loss ratio, packet error rate, and the average delay for various rate assignment approaches. The performance evaluation results are used to develop the guidelines for NB-Fi configuration to optimize the network performance.

翻译：NB-Fi是一种新型低功耗广域网技术，已被广泛应用于智慧城市、智能电网、工业物联网及遥测应用。尽管许多国家已采用NB-Fi，但相关学术研究几乎空白，其峰值性能尚不明确。本文旨在填补这一空白，通过分析该技术并研究NB-Fi网络中的速率分配问题。为此，本文建立数学模型，以计算不同速率分配方案下的丢包率、误包率及平均时延。基于性能评估结果，本文提出了优化NB-Fi网络性能的配置指南。