I. Introduction
With the development of 5G and the Internet of Things, more and more complex wireless communication networks, which include hundreds of battery-powered nodes, have been built. Unfortunately, these wireless terminals have limited battery capacity and require manual charging and replacement, resulting in increased battery recycling costs and unreliable communication quality. With the increasing awareness of human environmental protection, people pay more attention to the use of green energy in wireless communication. Energy harvesting (EH) is a promising approach to reduce carbon emissions, and prior studies on sensor networks have shown that harvesting energy from the environment significantly extends the life of networks ([1], [2]).