We propose a novel transmission protocol for harvest-then-transmit wireless powered communication networks, which takes into account the non-linearity of the energy harvesting (EH) process at the EH users and maximizes the sum rate in the uplink. We assume a piece-wise linear energy harvesting model and provide expressions for the optimal transmit power of the base station (BS), the duration of the EH phase, and the duration of the uplink information transmission phases of the users. The obtained solution provides insight regarding the significance of the non-linear EH model on the optimal resource allocation. Simulations unveil the growing impact of the saturation effect, which occurs for high received radio frequency powers, as the average and the maximum instantaneous transmit powers of the BS increase.
翻译:我们为收成后传输无线动力通信网络提出了一个新型传输协议,考虑到EH用户的能源收成过程非线性,并最大限度地提高上行总速率。我们假设一个片断线性能源收成模式,为基地站的最佳传输动力、EH阶段的持续时间和用户上传信息传输阶段的持续时间提供表达方式。获得的解决方案为非线性EH模型对最佳资源分配的重要性提供了深刻的见解。模拟揭示了饱和效应的日益扩大的影响,随着BS平均和最大瞬间传输能力的增加,高收发无线电频率功率将出现这种效应。