Similar to the evolution from the wired Internet to mobile Internet (MI), the growing demand for power delivery anywhere and anytime appeals for power grid transformation from wired to mobile domain. We propose here the next generation of power delivery network -- mobile power network (MPN) for wireless power transfer within a mobile range from several meters to tens of meters. At first, we present the MPN's concept evolution and application scenarios. Then, we introduce the MPN's supporting technology, namely resonant beam charging (RBC). As a long-range wireless power transfer (WPT) method, RBC can safely deliver multi-Watt power to multiple devices concurrently. Meanwhile, the recent progress in RBC research has been summarized. Next, we specify the MPN's architecture to provide the wide-area WPT coverage. Finally, we discuss the MPN's features and challenges. MPN can enable the ultimate mobility by cutting the final cord of mobile devices, realizing the "last-mile" mobile power delivery.

翻译：类似于从有线互联网到移动互联网（MI）的演变，随时随地进行电力传输日益增长的需求呼吁电网从有线领域向移动领域转型。本文提出了下一代电力传输网络——移动电力网络（MPN），用于在数米至数十米的移动范围内实现无线电力传输。首先，我们阐述了MPN的概念演进及应用场景。然后，介绍了MPN的支撑技术——谐振光束充电（RBC）。作为长距离无线电力传输（WPT）方法，RBC能够同时安全地向多个设备传输数瓦功率。同时，总结了RBC研究的最新进展。接着，我们明确了MPN的架构以提供广域WPT覆盖。最后，讨论了MPN的特性与挑战。MPN通过切断移动设备的最后一根线缆，实现终极移动性，完成“最后一英里”的移动电力传输。