The prosperity of IEEE 802.11-based Wi-Fi networks aggravates cross-technology interference to IEEE 802.15.4-enabled ZigBee networks widely deployed to enable various Internet-of-Things applications. To make ZigBee communication reliable and robust even in a dense Wi-Fi environment, taming Wi-Fi interference in ZigBee networks especially from the perspective of physical layer is of paramount importance. In this context, this work takes aim to design a novel Wi-Fi interference-resilient ZigBee decoder called PolarScout, which separates collided ZigBee signal samples out of Wi-Fi interference to bootstrap ZigBee data decoding. Unlike several existing solutions which need clear signal preamble, tremendous signal strength difference between ZigBee and Wi-Fi, and Wi-Fi interference recognition in prior to ZigBee decoding, PolarScout aims at direct ZigBee decoding in a more generic and challenging case where Wi-Fi interference features a wide range of power levels and arises within a ZigBee packet at an arbitrary position. At the heart of PolarScout lies a subtle shell-shaping technique which harnesses a customized sample sequence to smooth the shell of corrupted signal samples. PolarScout then refers to the resulting shell to recover each contaminated ZigBee sample. Experimental results validate the superiority of PolarScout and its resilience to a wide range of Wi-Fi interference types.

中文翻译：

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PolarScout：通过外壳成型实现Wi-Fi干扰弹性ZigBee通信

基于IEEE 802.11的Wi-Fi网络的繁荣加剧了对跨IEEE 802.15.4启用的ZigBee网络的跨技术干扰，这些ZigBee网络被广泛部署以支持各种物联网应用。为了即使在密集的Wi-Fi环境中也能使ZigBee通信可靠且健壮，尤其是从物理层的角度来看，驯服ZigBee网络中的Wi-Fi干扰至关重要。在这种情况下，这项工作旨在设计一种名为PolarScout的新颖的具有Wi-Fi抗干扰能力的ZigBee解码器，该解码器将冲突的ZigBee信号样本与Wi-Fi干扰分离开来，以自举ZigBee数据解码。与需要清晰信号前导码的几种现有解决方案不同，ZigBee与Wi-Fi之间的信号强度差异巨大，而且ZigBee解码之前需要进行Wi-Fi干扰识别，PolarScout旨在在更为通用和更具挑战性的情况下对ZigBee进行直接解码，在这种情况下，Wi-Fi干扰具有很宽的功率范围，并会在ZigBee数据包中的任意位置出现。PolarScout的核心是一种微妙的外壳成形技术，该技术利用定制的采样序列来平滑损坏的信号样本的外壳。然后，PolarScout将参考所得的外壳以回收每个受污染的ZigBee样品。实验结果证明了PolarScout的优越性及其对各种Wi-Fi干扰类型的适应能力。PolarScout的核心是微妙的外壳成形技术，该技术利用定制的采样序列来平滑损坏的信号样本的外壳。然后，PolarScout将参考所得的外壳以回收每个受污染的ZigBee样品。实验结果证明了PolarScout的优越性及其对各种Wi-Fi干扰类型的适应能力。PolarScout的核心是一种微妙的外壳成形技术，该技术利用定制的采样序列来平滑损坏的信号样本的外壳。然后，PolarScout将参考所得的外壳以回收每个受污染的ZigBee样品。实验结果证明了PolarScout的优越性及其对各种Wi-Fi干扰类型的适应能力。