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A survey on NB-IoT downlink scheduling: Issues and potential solutions

机译：NB-IoT下行链路调度调查：问题和潜在解决方案

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The NarrowBand Internet of Things (NB-IoT) is one of the most promising technologies that fits the requirements of the low-power wide area networks (LPWAN). NB-IoT targets on supporting communications for small amount of data during a relatively long period of time (i.e., delay tolerant), which is one of the key features of IoT applications. Several studies have been conducted by some standard working groups to define the standards for NB-IoT. For example, the working group 3GPP aims to provide communication protocols with low energy consumption, good coverage penetration, and so on. Compared with the existing wireless communication protocols, less spectrum is allocated for NB-IoT. Thus, how to more efficiently use the resource/spectrum (i.e., resource allocation and scheduling) is one of the key issues. In this paper, we first describe the design of the physical layer for the downlink communication, especially the scheduling process. Secondly, we discuss the issues for resource allocation in NB-IoT while the delay requirement in the physical layer is satisfied. Thirdly, we discuss the open questions and possible solutions.
机译：窄带物联网（NB-IoT）是满足低功耗广域网（LPWAN）要求的最有前途的技术之一。 NB-IoT的目标是在相对较长的时间内（即耐延迟）支持少量数据的通信，这是IoT应用程序的关键功能之一。一些标准工作组已经进行了几项研究，以定义NB-IoT的标准。例如，3GPP工作组旨在为通信协议提供低能耗，良好的覆盖范围等。与现有的无线通信协议相比，为NB-IoT分配的频谱更少。因此，如何更有效地使用资源/频谱（即资源分配和调度）是关键问题之一。在本文中，我们首先描述下行链路通信的物理层设计，尤其是调度过程。其次，我们讨论了在满足物理层的延迟要求的同时，NB-IoT中资源分配的问题。第三，我们讨论未解决的问题和可能的解决方案。

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