Cross-Technology Communication (CTC) is an emerging technique that enables direct interconnection among incompatible wireless technologies. However, CTC channels are inherently asymmetric because of either the one-way nature of emulation or the asymmetric communication range caused by the asymmetric transmission power. In this paper, we focus on establishing symmetric CTC over asymmetric CTC channels. The bottleneck is the short communication range from the low-power and narrow-band technology to the high-power and wide-band technology. To compensate the inevitable distortions, we take advantage of the channel asymmetry and construct chirps in WiFi Channel State Information (CSI) to extend the communication range from ZigBee to WiFi. We build the theoretical model of CSI chirp based CTC and design c-Chirp , a novel CTC from ZigBee to WiFi. Due to channel asymmetry and discreteness, the WiFi receiver can only observe partial and distorted CSI chirps. To cope with this issue, we design a matching based chirp decoding method as well as an adaptation algorithm to reliably decode the symbols. We further extend c-Chirp to one-to-multiple concurrent transmission scenario. The evaluation results show that c-Chirp can achieve a communication range of $60m$ , which is $6\times $ longer than ZigFi, an existing representative CTC from ZigBee to WiFi.

中文翻译：

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啁啾: 通过非对称通道实现对称跨技术通信

跨技术通信 (CTC) 是一种新兴技术，可实现不兼容的无线技术之间的直接互连。然而，CTC 信道本质上是不对称的，因为仿真的单向性质或不对称传输功率导致的不对称通信范围。在本文中，我们专注于在非对称 CTC 通道上建立对称 CTC。瓶颈是从低功率窄带技术到高功率宽带技术的通信距离短。为了补偿不可避免的失真，我们利用信道不对称性并在 WiFi 信道状态信息 (CSI) 中构造啁啾以将通信范围从 ZigBee 扩展到 WiFi。我们建立了基于 CSI chirp 的 CTC 的理论模型和设计啁啾 ，一种从 ZigBee 到 WiFi 的新型 CTC。由于信道不对称和离散性，WiFi 接收器只能观察到部分失真的 CSI 啁啾。为了解决这个问题，我们设计了一种基于匹配的啁啾解码方法以及一种自适应算法来可靠地解码符号。我们进一步扩展啁啾到一对多并发传输场景。评估结果表明，啁啾 可以达到通信范围 6000万美元 ，这是 $6\times $ 比 ZigFi 更长，从 ZigBee 到 WiFi 的现有代表性 CTC。