快速而有弹性的LoRa跳跃:用于分散的地震预警系统的新型多节点架构
Vinuja Ranasinghe1, Nuwan Udara1, Movindi Mathotaarachchi1
1Department of Electronic & Telecommunication Engineering, University of Moratuwa, Moratuwa 10400, Sri Lanka.
Sensors (Basel, Switzerland)
|September 28, 2024
概括
一个新的基于LoRa的通信系统为地震预警 (EEW) 提供了互联网的可行替代方案. 这种多节点网络有效地传播警报,从而提供了重要的准备时间.
科学领域:
- 电气工程 电气工程
- 计算机科学 计算机科学
- 地质物理学 地质物理学
背景情况:
- 在自然灾害期间,公共互联网基础设施可能很脆弱.
- 现有的地震预警系统依赖于互联网连接.
- LoRa (长距离) 适用于低功耗,远程通信,但在时间关键的数据传输方面面临挑战.
研究的目的:
- 开发和评估一种基于LoRa的多节点通信架构,作为EEW公共互联网的替代方案.
- 评估这种架构在为分散的EEW传感器网络生成有意义的警告窗口方面的有效性.
- 为了克服LoRa的传输时间固有的局限性,用于时间关键的EEW应用.
主要方法:
- 实施一个多节点的LoRa网络,其中包括终端节点和转接节点,用于广播EEW.
- 使用低传播因子 (SF) 来最大限度地减少传输时间.
- 对比模拟结果与现有的基于互联网的EEW系统 (CRISiSLab的基于PLUM的系统) 相比.
- 进行实践演示的Lilygo LoRa32原型设备的实验.
主要成果:
- 一个基于LoRa的网络与SF 8可以在2.4秒内在30公里的城市区域传播警告.
- 拟议的系统通过多个消息路由路径展示了弹性.
- 基于LoRa的系统实现了1-6秒的警告窗口,与基于互联网的系统的1.5-6.75秒相比.
- 使用原型设备的实践演示验证了该系统的可行性.
结论:
- 基于LoRa的新型多节点通信架构对及时的EEW有效.
- 该系统为依赖互联网的EEW基础设施提供了弹性和可行的替代方案.
- 实现的预警时间足以进行心理准备,保护行动和自动化.
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