In this work, we analyze performances of the unmanned aerial vehicle- (UAV-) assisted wireless powered sensor communication, where sensor transmission ability is supported by the UAV. Harvested energy from the UAV-broadcasted signal is further used at the sensor nodes for uplink information transmission to the UAV, over assumed shadowed fading channels. Here, we observe a general scenario in which due to the flight conditions of the UAV, the channel’s content include the LOS components affected by the shadowing effect, modeled by the general shadowed channel model, which can be reduced to other well-known channel models as its special cases. We derive closed-form expressions for the outage probability (OP) of such wireless sensor network (WSN) operating in shadowed fading environments. Further, we analyze the optimization of time allocation to minimize OP subjected to UAV’s energy constraints. The impact of channel parameters on observed performance measures is analyzed, and obtained results are numerically validated.

中文翻译：

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无人机辅助无线供电传感器网络在阴影衰落信道上的性能分析

在这项工作中，我们分析了无人飞行器（UAV）辅助的无线传感器通信的性能，其中无人机具有支持传感器的传输能力。在假定的阴影衰落信道上，从UAV广播的信号中收集的能量还将在传感器节点处用于向UAV的上行链路信息传输。在这里，我们观察到一个一般情况，在这种情况下，由于无人机的飞行条件，通道的内容包括受阴影效应影响的LOS分量（由通用阴影通道模型建模），可以将其简化为其他知名通道模型作为特殊情况。我们得出在阴影中运行的这种无线传感器网络（WSN）的中断概率（OP）的闭式表达式衰落的环境。此外，我们分析了时间分配的优化，以最大程度地减少受无人机能量限制的OP。分析了信道参数对观察到的性能指标的影响，并对获得的结果进行了数值验证。