WiZig: Cross-Technology Energy Communication Over a Noisy Channel
WiZig: Cross-Technology Energy Communication Over a Noisy Channel
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WiZig：通过嘈杂通道进行跨技术能源通信
DOI：
10.1109/tnet.2020.3013921
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发表时间：
2020-12-01
影响因子：
3.7
通讯作者：
Zheng, Xiaolong
中科院分区：
文献类型：
--
作者：
Guo, Xiuzhen;He, Yuan;Zheng, Xiaolong
物联网应用的激增带来了异构无线设备之间无处不在的连接需求。跨技术通信（CTC）是在遵循不同标准的异构设备之间直接交换数据的重要技术。通过利用侧信道，如频率，幅度或时间调制，现有的作品使CTC，但在信道噪声下的性能有限。在这篇文章中，我们提出了WiZig，一种新的CTC技术，从WiFi到ZigBee，采用调制的幅度和时间维度，以优化吞吐量在嘈杂的信道。建立了能量通信信道的理论模型，明确了信道容量。然后，我们设计了一个在线速率自适应算法，根据信道条件调整调制策略。WiZig在理论模型的基础上，通过控制编码能量幅值的个数和接收窗口的长度，优化CTC的吞吐量。我们在软件无线电平台和商业ZigBee设备上实现了WiZig的原型。测试结果表明，WiZig在真实的环境中，以小于1%的误码率获得了153.85 bps的吞吐量。
The proliferation of IoT applications brings the demand of ubiquitous connections among heterogeneous wireless devices. Cross-Technology Communication (CTC) is a significant technique to directly exchange data among heterogeneous devices that follow different standards. By exploiting a side-channel like frequency, amplitude, or temporal modulation, the existing works enable CTC but have limited performance under channel noise. In this article, we propose WiZig, a novel CTC technique from WiFi to ZigBee that employs modulations in both the amplitude and temporal dimensions to optimize the throughput over a noisy channel. We establish a theoretical model of the energy communication channel to clearly understand the channel capacity. We then devise an online rate adaptation algorithm to adjust the modulation strategy according to the channel condition. Based on the theoretical model, WiZig controls the number of encoded energy amplitudes and the length of a receiving window, so as to optimize the CTC throughput. We implement a prototype of WiZig on a software radio platform and a commercial ZigBee device. The evaluation shows that WiZig achieves a throughput of 153.85bps with less than 1% symbol error rate in a real environment.