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Proceedings of the 21st International Workshop on Mobile Computing Systems and Applications(2020)

Northeastern University | AT&ampT Labs Research

Cited 17|Views8
Abstract
High-speed cellular connectivity for drones (UAVs) is a key requirement for infrastructure monitoring and live broadcasting applications, among others. Different from ground mobile phones (UEs), however, UAVs benefit from unique line-of-sight conditions to multiple base stations (BSs), which may result in degraded performances for UEs in the surroundings. We experimentally evaluate this effect on a controlled LTE testbed, measuring up to $21.75\:\mathrmMbps $ uplink throughput reduction for ground UEs in presence of UAVs. To mitigate this effect, we propose a new approach designed to reduce interference to adjacent BSs through a combination of steerable directional transmitters and optimized flight control. We design a control mechanism to jointly optimize the trajectory of the drone and the directional orientation of the uplink transmission. Based on an empirical characterization of aerial signal propagation in 3D, the proposed control algorithms solve optimal trajectory problems on a directed graph representation of the aerial space. Our evaluation shows average interference reduction at neighboring BSs of $5.87\:\mathrmdB $ and average improvement of the drone signal-to-noise ratio of $9.23\:\mathrmdB $ compared to traditional channel-unaware flight control solutions employing omni-directional transmitters.
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Drone Applications,UAV Networks,Mobile Edge Computing,Device-to-Device Communication
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Chat Paper

要点】:本文提出了一种新的方法,通过结合可转向的方向性发射机和优化的飞行控制,以减少无人机对周边基站的干扰,从而提高地面用户的上链路吞吐量。

方法】:研究通过实验评估了无人机对地面用户的影响,并提出了一种控制机制,该机制可以同时优化无人机的轨迹和上链路传输的方向性。

实验】:在受控的LTE测试平台上进行的实验中,使用的数据集名称未提及,测量了无人机存在时地面用户的上链路吞吐量最多减少了$21.75:\mathrmMbps$。实验结果表明,与传统的不考虑信道的全向传输解决方案相比,提出的控制算法在邻近基站处的平均干扰降低了$5.87:\mathrmdB$,无人机的信号噪声比平均提高了$9.23:\mathrmdB$。