With the ever growing internet of things market, Low Power Wide Area Networks (LPWAN) become more and more attractive. Among the various LPWAN technologies, LoRa (and LoRaWAN) has drawn a lot of research attention with its great adaptation capability. In fact, its spectrum modulation spreading factor, transmission power, data rate, channel bandwidth, and coding rate are so many configurable parameters allowing to cope with a large number of use cases. In addition, through its ADR (Adaptive Data Rate) function, LoRa offers an interesting mechanism to self-adapt its configuration to its operational conditions. Several works have been carried out for extending ADR to further improve its performance for different use cases. LoRa has even been recently investigated on its capacity to support the mobility, although it is not originally designed for. In this paper, we first review the most significant ADR enhancements proposed in the literature, then describe our earlier E-ADR proposal [1] aiming at dealing with the node mobility use case. This paper also provides experimental performance evaluations of the reviewed ADR enhancements in a mobile node scenario, highlighting the unique feature of E-ADR.

随着物联网市场的不断增长，低功耗广域网（LPWAN）变得越来越有吸引力。在各种LPWAN技术中，LoRa（和LoRaWAN）以其强大的适应能力吸引了许多研究关注。实际上，它的频谱调制扩展因子，传输功率，数据速率，信道带宽和编码速率是如此众多可配置的参数，从而可以应对大量使用情况。此外，LoRa通过其ADR（自适应数据速率）功能，提供了一种有趣的机制，可根据其运行状况自动调整其配置。已经进行了一些扩展ADR的工作，以进一步提高其在不同用例下的性能。尽管LoRa并非最初设计用于支持移动性，但最近甚至对其容量进行了研究。在本文中，我们首先回顾文献中提出的最重要的ADR增强功能，然后描述我们早期的E-ADR提议[1]，旨在处理节点移动性用例。本文还提供了在移动节点方案中审阅的ADR增强功能的实验性能评估，重点介绍了E-ADR的独特功能。