论文标题
在实用天线配置下移动蜂窝连接无人机的性能分析
Performance Analysis of Mobile Cellular-Connected Drones under Practical Antenna Configurations
论文作者
论文摘要
由于遇到的视线干扰和下倾斜的基站（BS）天线的增益减少，因此为无人机用户设备（UAV-US）提供无缝连通性非常具有挑战性。例如，随着无人机的高度增加，它们的细胞缔合和移交过程被BS天线的侧室驱动。在本文中，在3D实际天线构型下研究了细胞连接的无人机的性能。研究了两种情况：具有静态的，悬停的无人机和带有移动无人机的方案的场景。对于这两种情况，UAV-UE覆盖范围的概率都是系统参数的函数的。然后研究了天线元件数量对移动无人机的无人机覆盖率和移交率的影响。结果表明，在实用天线模式下的无人机覆盖率概率比简单天线模型下的覆盖率要差。此外，由于无效的空白和天线侧唇的峰，垂直移动的无人机易于高度移交。
Providing seamless connectivity to unmanned aerial vehicle user equipments (UAV-UEs) is very challenging due to the encountered line-of-sight interference and reduced gains of down-tilted base station (BS) antennas. For instance, as the altitude of UAV-UEs increases, their cell association and handover procedure become driven by the side-lobes of the BS antennas. In this paper, the performance of cellular-connected UAV-UEs is studied under 3D practical antenna configurations. Two scenarios are studied: scenarios with static, hovering UAV- UEs and scenarios with mobile UAV-UEs. For both scenarios, the UAV-UE coverage probability is characterized as a function of the system parameters. The effects of the number of antenna elements on the UAV-UE coverage probability and handover rate of mobile UAV-UEs are then investigated. Results reveal that the UAV-UE coverage probability under a practical antenna pattern is worse than that under a simple antenna model. Moreover, vertically-mobile UAV-UEs are susceptible to altitude handover due to consecutive crossings of the nulls and peaks of the antenna side-lobes.
