This letter presents ZIP (zero-effort ZIgBee Proximity detection), a novel technique to detect the proximity of two Internet-of-Things devices. Based on the ZigBee technology, ZIP embodies the first zero-effort solution by differing from existing ones that resort to the use of tailor-made hardware, multiple antenna installments, the employment of a third-party device, or user involvement. At the heart of ZIP is the construction of a feature-designated decision tree built on received signal strength. An ensemble prediction method is further designed to aggregate the outputs of multiple decision trees for detection accuracy improvement. Practical experiments are conducted to show the reliability and robustness of ZIP.

中文翻译：

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使用 ZigBee 的零努力接近检测

这封信介绍了 ZIP（零努力 ZIgBee 接近检测），这是一种检测两个物联网设备接近程度的新技术。ZIP 基于 ZigBee 技术，不同于现有的采用定制硬件、多天线安装、使用第三方设备或用户参与的解决方案，体现了第一个零努力解决方案。ZIP 的核心是构建基于接收信号强度的特征指定决策树。进一步设计了一种集成预测方法来聚合多个决策树的输出以提高检测精度。进行了实际实验以证明 ZIP 的可靠性和稳健性。