Energy Tradeoff in Ground-to-UAV Communication via Trajectory Design
Energy Tradeoff in Ground-to-UAV Communication via Trajectory Design
复制标题
通过轨迹设计进行地对无人机通信的能量权衡
DOI：
10.1109/tvt.2018.2816244
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发表时间：
2018-07-01
影响因子：
6.8
通讯作者：
Zhang, Rui
中科院分区：
文献类型：
--
作者：
Yang, Dingcheng;Wu, Qingqing;Zhang, Rui
无人机具有高度的机动性，在提高无线通信系统性能方面具有巨大的潜力。在这封信中，我们研究了一个无人机使能的数据收集系统，其中无人机被派遣到收集给定量的数据从地面终端（GT）在固定的位置。直观地说，如果无人机飞得更靠近GT，则GT发送目标数据所需的上行传输能量可以减少得更多。然而，这样的UAV移动可能消耗UAV的更多推进能量，这需要被适当地控制以节省其有限的机载能量。因此，GT的传输能量减少通常是以tiff的更高推进能量消耗为代价的，这导致了地面到UAV无线通信中的新的基本能量折衷。为了描述这种权衡，我们考虑两种实际的无人机轨迹，即圆形飞行和直线飞行。在每种情况下，我们首先推导出无人机和燃气轮机的能量消耗表达式，然后找到最佳燃气轮机发射功率和无人机轨迹，实现不同的帕累托最优折衷之间。数值结果证实了我们的研究。
Unmanned aerial vehicles (UAVs) have a great potential for improving the performance of wireless communication systems due to their high mobility. In this correspondence, we study a UAV-enabled data collection system, where a UAV is dispatched to collect a given amount of data from a ground terminal (GT) at fixed location. Intuitively, if the UAV flies closer to the GT, the uplink transmission energy of the GT required to send the target data can be more reduced. However, such UAV movement may consume more propulsion energy of the UAV, which needs to be properly controlled to save its limited on-board energy. As a result, the transmission energy reduction of the GT is generally at the cost of higher propulsion energy consumption of the tiff, which leads to a new fundamental energy tradeoff in ground-to-UAV wireless communication. To characterize this tradeoff, we consider two practical UAV trajectories, namely circular flight and straight flight. In each case, we first derive the energy consumption expressions of the UAV and GT and then find the optimal GT transmit power and UAV trajectory that achieve different Pareto optimal tradeoffs between them. Numerical results are provided to corroborate our study.