Recently, Wireless Power Transfer (WPT) technique using a Radio Frequency (RF) signal has been attracting much attention to sustain the lifetime of wireless Internet of Things (IoT) devices. When a power transmission RF signal operates in the same or near the frequency band as a data signal, it may decrease communication performance. In this letter, we have proposed a novel protocol that enables data transmission and power transmission to coexist by using the characteristics of spatial diversity of wireless power transmission with beamforming technology. Also, a station in need of power can actively request power to the Power Beacon (PB). Our protocol not only increases throughput but also reduces wasted energy compared with the conventional one.

中文翻译：

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具有空间重用的空气充电协议

最近，使用射频 (RF) 信号的无线电力传输 (WPT) 技术在维持无线物联网 (IoT) 设备的使用寿命方面备受关注。当电力传输射频信号在与数据信号相同或接近的频带中工作时，它可能会降低通信性能。在这封信中，我们提出了一种新颖的协议，利用波束成形技术利用无线电力传输的空间分集特性，使数据传输和电力传输能够共存。此外，需要电力的站点可以主动向电力信标 (PB) 请求电力。与传统协议相比，我们的协议不仅增加了吞吐量，而且还减少了能源浪费。