Liang Ruobing, Zhao Liang, Wang Peng
Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China.
Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education, Dalian University of Technology, Dalian 116024, China.
Sensors (Basel). 2020 Jul 9;20(14):3828. doi: 10.3390/s20143828.
The Internet of things presents tremendous opportunities for the energy management and occupant comfort improvement in smart buildings by making data of environmental and equipment parameters more readily and continuously available. Long-range (LoRa) technology provides a comprehensive wireless solution for data acquisition and communication in smart buildings through its superior performance, such as the long-range transmission, low power consumption and strong penetration. Starting with two vital indicators (network transmission delay and packet loss rate), this study explored the coverage and transmission performances of LoRa in buildings in detail. We deployed three LoRa receiver nodes on the same floor and eight LoRa receiver nodes on different floors in a 16-story building, respectively, where data acquisition terminal was located in the center of the whole building. The communication performance of LoRa was evaluated by changing the send power, communication rate, payload length and position of the wireless module. In the current research, the metrics of LoRa were quantified to facilitate its practical application in smart buildings. To the best of our knowledge, this may be the first academic research evaluating RTT performance of LoRa via practical experiments.
物联网通过使环境和设备参数数据更易于且持续可用，为智能建筑中的能源管理和居住者舒适度提升带来了巨大机遇。长距离（LoRa）技术凭借其卓越性能，如远距离传输、低功耗和强穿透性，为智能建筑中的数据采集和通信提供了全面的无线解决方案。本研究从两个关键指标（网络传输延迟和丢包率）入手，详细探究了LoRa在建筑物中的覆盖范围和传输性能。我们在一座16层建筑的同一楼层分别部署了三个LoRa接收节点，在不同楼层部署了八个LoRa接收节点，数据采集终端位于整座建筑的中心位置。通过改变无线模块的发射功率、通信速率、有效载荷长度和位置来评估LoRa的通信性能。在当前研究中，对LoRa的各项指标进行了量化处理，以促进其在智能建筑中的实际应用。据我们所知，这可能是第一项通过实际实验评估LoRa往返时间（RTT）性能的学术研究。
