Outage-Optimized Deployment of UAVs
Outage-Optimized Deployment of UAVs
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DOI：
10.1109/pimrc.2019.8904305
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Maryam Shabanighazikelayeh;Erdem Koyuncu
中科院分区：
文献类型：
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作者：
Maryam Shabanighazikelayeh;Erdem Koyuncu
我们认为多个无人机（UAV）服务的地面终端（GT）的密度作为移动的基站。目标是最小化GT到UAV传输的中断概率。在此背景下，无人机的优化布局在不同的无人机高度约束和GT密度进行了研究。首先，使用一个随机部署的参数，一般上限的最佳中断概率发现任何密度的GT和任何数量的无人机。最优部署的性能的下限也被确定。上界和下界相结合，以显示最佳中断概率与无人机的数量呈指数衰减GT密度与有限的支持。其次，研究了当公共高度约束较大时的最优部署结构。在这种情况下，对于一个广泛的GT密度类，它表明，所有的无人机应放置在相同的位置在一个最佳的部署。一个设计的含义是，一个可以使用一个单一的多天线无人机，而不是多个单天线无人机没有损失的最佳性。采用粒子群优化算法对无人机部署进行数值优化。仿真结果也证实了分析结果。
We consider multiple unmanned aerial vehicles (UAVs) serving a density of ground terminals (GTs) as mobile base stations. The objective is to minimize the outage probability of GT-to-UAV transmissions. In this context, the optimal placement of UAVs under different UAV altitude constraints and GT densities is studied. First, using a random deployment argument, a general upper bound on the optimal outage probability is found for any density of GTs and any number of UAVs. Lower bounds on the performance of optimal deployments are also determined. The upper and lower bounds are combined to show that the optimal outage probability decays exponentially with the number of UAVs for GT densities with finite support. Next, the structure of optimal deployments are studied when the common altitude constraint is large. In this case, for a wide class of GT densities, it is shown that all UAVs should be placed to the same location in an optimal deployment. A design implication is that one can use a single multi-antenna UAV as opposed to multiple single-antenna UAVs without loss of optimality. Numerical optimization of UAV deployments are carried out using particle swarm optimization. Simulation results are also presented to confirm the analytical findings.