Cross-technology communication (CTC) is a technique that enables direct communication among different wireless technologies. Recent works in this area have made substantial progress, but CTC from ZigBee to WiFi remains an open problem. In this paper, we propose ZigFi, a novel CTC framework that enables communication from ZigBee to WiFi. ZigFi carefully overlaps ZigBee packets with WiFi packets. Through experiments we show that Channel State Information (CSI) of the overlapped packets can be used to convey data from ZigBee to WiFi. Based on this finding, we propose a receiver-initiated protocol and translate the decoding problem into a problem of CSI classification with Support Vector Machine. We further build a generic model through experiments, which describes the relationship between the Signal to Interference and Noise Ratio (SINR) and the symbol error rate (SER). Moreover, we extend ZigFi to multiple-to-one concurrent transmissions. We implement ZigFi on commercial-off-the-shelf WiFi and ZigBee devices. We evaluate the performance of ZigFi under different experimental settings. The results demonstrate that ZigFi achieves a throughput of 215.9bps, which is 18X faster than the state of the arts.

中文翻译：

---

ZigFi：利用通道状态信息进行跨技术通信

跨技术通信（CTC）是一种能够在不同无线技术之间进行直接通信的技术。该领域的最新工作取得了实质性进展，但是从ZigBee到WiFi的CTC仍然是一个未解决的问题。在本文中，我们提出了ZigFi，这是一种新颖的CTC框架，可实现从ZigBee到WiFi的通信。ZigFi小心地将ZigBee数据包与WiFi数据包重叠。通过实验，我们证明了重叠数据包的信道状态信息（CSI）可用于将数据从ZigBee传输到WiFi。基于此发现，我们提出了一种接收器启动的协议，并使用支持向量机将解码问题转化为CSI分类问题。我们通过实验进一步建立通用模型，它描述了信干噪比（SINR）与符号错误率（SER）之间的关系。此外，我们将ZigFi扩展到多对一并发传输。我们在现成的商用WiFi和ZigBee设备上实现ZigFi。我们评估不同实验设置下ZigFi的性能。结果表明ZigFi达到215.9bps的吞吐量，比现有技术快18倍。