Providing wireless coverage to high-rise buildings using UAVs
Providing wireless coverage to high-rise buildings using UAVs
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DOI：
10.1109/icc.2017.7997403
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
Hazim Shakhatreh;Abdallah Khreishah;Bo Ji
中科院分区：
文献类型：
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作者：
Hazim Shakhatreh;Abdallah Khreishah;Bo Ji
当蜂窝网络出现故障时，无人机（UAV）可以用作空中无线基站。基于UAV的无线覆盖的先前研究通常考虑空对地路径损耗模型，其假设用户在室外并且他们位于2D平面上。在本文中，我们建议使用一个单一的无人机提供无线覆盖的高层建筑内的室内用户在灾害情况下（如地震或洪水），当蜂窝网络下降。首先，我们提出了一个现实的室外-室内路径损耗模型，并描述了这个模型引入的权衡。然后，我们研究了高效的无人机布局问题，其目标是最小化覆盖整个高层建筑所需的总发射功率。公式化的问题是非凸的，通常很难解决。为此，我们考虑两种情况下的实际利益，并提供有效的解决方案，制定这些情况下的问题。在第一种情况下，我们的目标是找到最小的发射功率，使室内用户的最大路径损耗可以覆盖。在第二种情况下，我们假设室内用户的位置在每个楼层的维度上是对称的。
Unmanned aerial vehicles (UAVs) can be used as aerial wireless base stations when cellular networks go down. Prior studies on UAV-based wireless coverage typically consider an Air-to-Ground path loss model, which assumes that the users are outdoor and they are located on a 2D plane. In this paper, we propose using a single UAV to provide wireless coverage for indoor users inside a high-rise building under disaster situations (such as earthquakes or floods), when cellular networks are down. First, we present a realistic Outdoor-Indoor path loss model and describe the tradeoff introduced by this model. Then, we study the problem of efficient UAV placement, where the objective is to minimize the total transmit power required to cover the entire high-rise building. The formulated problem is non-convex and is generally difficult to solve. To that end, we consider two cases of practical interest and provide the efficient solutions to the formulated problem under these cases. In the first case, we aim to find the minimum transmit power such that an indoor user with the maximum path loss can be covered. In the second case, we assume that the locations of indoor users are symmetric across the dimensions of each floor.