Several networking technologies targeting the IoT application space currently compete within the smart city domain, both in outdoor and indoor deployments. However, up till now, there is no clear winner, and results from real-world deployments have only recently started to surface. In this paper, we present a comparative study of 2 popular IoT networking technologies, LoRa and IEEE 802.15.4, within the context of a research-oriented IoT deployment inside school buildings in Europe, targeting energy efficiency in education. We evaluate the actual performance of these two technologies in real-world settings, presenting a comparative study on the effect of parameters like the built environment, network quality, or data rate. Our results indicate that both technologies have their advantages, and while in certain cases both are perfectly adequate, in our use case LoRa exhibits a more robust behavior. Moreover, LoRa's characteristics make it a very good choice for indoor IoT deployments such as in educational buildings, and especially in cases where there are low bandwidth requirements.

中文翻译：

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将LoRa和IEEE 802.15.4用于支持IoT的教室的经验

目前，针对物联网应用程序空间的多种联网技术正在室外和室内部署中在智能城市领域竞争。但是，到目前为止，还没有明确的赢家，实际部署的结果只是最近才浮出水面。在本文中，我们在欧洲学校建筑内以研究为导向的物联网部署的背景下，针对教育中的能源效率，对两种流行的物联网网络技术LoRa和IEEE 802.15.4进行了比较研究。我们评估了这两种技术在实际环境中的实际性能，对构建环境，网络质量或数据速率等参数的影响进行了比较研究。我们的结果表明，这两种技术都有其优势，尽管在某些情况下两者都非常合适，在我们的用例中，LoRa表现出更强大的行为。此外，LoRa的特性使其成为室内IoT部署（如教育建筑中）的绝佳选择，尤其是在带宽要求较低的情况下。