Low Power Wide Area Networks: An Overview
Low Power Wide Area Networks: An Overview
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DOI：
10.1109/comst.2017.2652320
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发表时间：
2017-01-01
影响因子：
35.6
通讯作者：
Sooriyabandara, Mahesh
中科院分区：
文献类型：
--
作者：
Raza, Usman;Kulkarni, Parag;Sooriyabandara, Mahesh
低功耗广域（LPWA）网络吸引了大量的关注，主要是因为它们能够为分布在非常大的地理区域的低功耗设备提供负担得起的连接。在实现物联网愿景的过程中，LPWA技术在各种新兴智慧城市和机器对机器应用的性能上补充甚至有时取代了传统的蜂窝和短距离无线技术。本文介绍了不同LPWA技术的设计目标和技术，以低数据速率为代价为低功耗设备提供广域覆盖。我们调查了几种新兴的LPWA技术以及由不同标准开发组织（例如IEEE、IETF、3GPP、ETSI）以及围绕单个LPWA技术构建的工业联盟（例如LORa联盟、weightless sig和DASH7联盟）开展的标准化活动。我们进一步注意到，LPWA技术采用类似的方法，因此具有类似的限制和挑战。本文对这些研究挑战进行了扩展，并确定了解决这些挑战的潜在方向。虽然专有的LPWA技术已经在全国范围内大规模推出，但本文鼓励研究界积极参与解决将在未来十年塑造数百亿设备连接的问题。
Low power wide area (LPWA) networks are attracting a lot of attention primarily because of their ability to offer affordable connectivity to the low-power devices distributed over very large geographical areas. In realizing the vision of the Internet of Things, LPWA technologies complement and sometimes supersede the conventional cellular and short range wireless technologies in performance for various emerging smart city and machine-to-machine applications. This review paper presents the design goals and the techniques, which different LPWA technologies exploit to offer wide-area coverage to low-power devices at the expense of low data rates. We survey several emerging LPWA technologies and the standardization activities carried out by different standards development organizations (e.g., IEEE, IETF, 3GPP, ETSI) as well as the industrial consortia built around individual LPWA technologies (e.g., LORa Alliance, WEIGHTLESS-SIG, and DASH7 alliance). We further note that LPWA technologies adopt similar approaches, thus sharing similar limitations and challenges. This paper expands on these research challenges and identifies potential directions to address them. While the proprietary LPWA technologies are already hitting the market with large nationwide roll-outs, this paper encourages an active engagement of the research community in solving problems that will shape the connectivity of tens of billions of devices in the next decade.