Distributed 3D Deployment of Aerial Base Stations for On-Demand Communication
Distributed 3D Deployment of Aerial Base Stations for On-Demand Communication
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DOI：
10.1109/twc.2021.3086815
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发表时间：
2021-12-01
影响因子：
10.4
通讯作者：
Ogura, Masaki
中科院分区：
文献类型：
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作者：
Kimura, Tatsuaki;Ogura, Masaki
空中基站（ABS），即无人驾驶飞行器机载基站，具有在临时事件（即热点）中自适应服务流量增加的能力，具有有效提高下一代无线网络覆盖范围的巨大潜力。然而，由于基站的高度自由度和小区间干扰，设计一个有效的三维基站部署是一个相当复杂的问题。在本文中，我们提出了一种新的分布式3D ABS部署方法来提供按需下行通信。为了考虑用户活动引起的用户位置的时空变化，我们采用非均匀点过程对其进行建模。通过分析该模型下的性能指标，应用分布式推和算法，提出了一种具有理论收敛保证的ABS部署算法，以分布式迭代的方式解决了整体通信质量的最大化问题。在我们的方法中，每个ABS通过与相邻ABS通信，根据其本地信息更新其位置。此外，我们还提出了一种利用地面传感器的部分观测数据估算总体用户密度的方法。仿真结果表明，该方法可以有效地提高整体通信质量，适用于动态网络。
An aerial base station (ABS), i.e., unmanned aerial vehicle-mounted base station, has a significant potential to effectively boost the coverage of next-generation wireless networks, having capability of adaptively serving traffic increase in temporary events (i.e., hotspots). However, designing an efficient 3D deployment of ABSs is a considerably complicated problem due to its high degree of freedom and inter-cell interference among ABSs. In this paper, we propose a novel distributed 3D ABS deployment method for providing on-demand downlink communications. To consider the spatial and temporal variations of user locations due to user activities, we model them by an inhomogeneous point process. By analyzing the performance metrics under this model and applying a distributed push-sum, we develop an ABS deployment algorithm with theoretical convergence guarantee that solves the maximization problems of the overall communication quality in a distributed and iterative manner. In our method, each ABS updates its position based on its local information by communicating with its neighboring ABSs. Furthermore, we propose an estimation method of the overall user density from partial observation of ground sensors. Simulation results demonstrate that our method can efficiently improve the overall communication quality and can be applied to a dynamic network.