XFi:通过商品WiFi进行跨技术物联网数据采集

Ruofeng Liu, Zhimeng Yin, Wenchao Jiang, T. He
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引用次数: 14

摘要

无线技术日益多样化,服务于各种物联网应用。然而,我们的移动设备(例如智能手机)是用有限类型的无线无线电制造的,这使得访问异构物联网设备中的数据变得具有挑战性。为了解决这个基本问题,本工作提出了XFi,它使移动设备能够使用商品WiFi无线电直接同时从各种异构物联网设备收集数据。我们的关键见解是,当物联网帧与正在进行的WiFi传输发生碰撞时,其物联网数据被WiFi接收器捕获并保留,即使在WiFi硬件中进行解调程序后也是如此。受此启发,XFi提出了一种通过分析解码的WiFi有效载荷来获取物联网数据的通用方法。该方法与现有商用WiFi硬件完全兼容,普遍适用于各种物联网协议。我们在商用设备上实现XFi(例如,RTL8812au, CC2650和SX1280)。我们的综合评估表明,XFi可以同时从8个物联网设备收集数据,准确率超过97%,提供可靠的跨技术数据收集。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
XFi: Cross-technology IoT Data Collection via Commodity WiFi
Wireless technologies are increasingly diversified to serve various Internet-of-things applications. Yet, our mobile devices (e.g., smartphones) are manufactured with limited types of wireless radio, making it challenging to access the data in the heterogeneous IoT devices. To address this fundamental problem, this work proposes XFi, which enables mobile devices to use commodity WiFi radio to directly and simultaneously collect data from diverse heterogeneous IoT devices. Our critical insight is that when an IoT frame collides with an ongoing WiFi transmission, its IoT data is captured by WiFi receiver and retained even after the demodulation procedures in WiFi hardware. Motivated by this observation, XFi proposes a general approach to obtain IoT data by analyzing the decoded WiFi payload. The method is fully compatible with existing commodity WiFi hardware and generally applicable to various IoT protocols. We implement XFi on commodity devices (e.g., RTL8812au, CC2650, and SX1280). Our comprehensive evaluation demonstrates that XFi can collect data from 8 IoT devices in parallel with over 97% accuracy, offering reliable cross-technology data collection.
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