LoRaWAN has become a flagship LPWAN technology, and one of the main connectivity alternatives for IoT devices. Since LoRaWAN was designed for low energy consumption, it is fundamental to understand its energy performance. In this paper, we study the impact of packet size on LoRaWAN device energy consumption per delivered data bit (EPB). By means of extensive simulations, we show that, when network performance is very high or very low, EPB decreases steadily with packet size; otherwise, EPB may show an “asymmetric U” shape as a function of packet size, with a minimum EPB value that is achieved for a medium packet size. We also provide detailed insights on the reasons that produce the observed behaviors.

中文翻译：

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了解数据包大小对 LoRaWAN 能效的影响

LoRaWAN 已成为旗舰 LPWAN 技术，也是物联网设备的主要连接替代方案之一。由于 LoRaWAN 专为低能耗而设计，因此了解其能源性能至关重要。在本文中，我们研究了数据包大小对 LoRaWAN 设备每传输数据位 (EPB) 能耗的影响。通过大量的模拟，我们表明，当网络性能非常高或非常低时，EPB随着数据包大小而稳定下降；否则，EPB 可能会显示出作为数据包大小的函数的“不对称 U”形状，其中最小 EPB 值是针对中等数据包大小实现的。我们还提供了关于产生观察到的行为的原因的详细见解。