Internet of Things (IoT) is one of the most cited terms within the communication research communities. Next generation wireless networks technologies are expected to have massive-connections of tens of billions of devices. Such a huge number of devices raised a number of concerns in regards to how much accessible resources are available and what are the best technologies for managing those resources, all in order to avoid shutdowns/collapses in every means. In terms of wireless networks, and in regards to energy being the backbone of IoT devices, Low Power Wide Area Networks (LPWAN) technologies are considered to be a potential solution for IoT applications. In particular, this study reviews Long-Range (LoRa) technology and advances in the literature of LoRaWAN protocol to date. Furthermore, it discusses the challenges in LoRaWAN and diverts the attention towards applying Ultra-Dense Network concept on LPWAN.

中文翻译：

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超致密的LoRaWAN：评论和挑战

物联网（IoT）是通信研究社区中引用最多的术语之一。下一代无线网络技术有望与数百亿个设备建立大规模连接。如此众多的设备引起了人们对可用资源的多少以及用于管理这些资源的最佳技术的担忧，所有这些都是为了避免各种方式的关闭/崩溃。就无线网络而言，就能源是物联网设备的骨干而言，低功耗广域网（LPWAN）技术被认为是物联网应用的潜在解决方案。特别是，本研究回顾了远程（LoRa）技术，并在LoRaWAN协议的文献中取得了进展。此外，