arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.01723eess.SPcs.ITmath.IT
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一种具有可重构智能表面的节能空中回程系统

An Energy-efficient Aerial Backhaul System with Reconfigurable Intelligent Surface

Hong-Bae Jeon, Sung-Ho Park, Jaedon Park, Kaibin Huang, Chan-Byoung Chae

摘要:

在本文中,我们提出了一种新的无线架构,安装在高空空中平台,这是使可重构智能表面(RIS)。通过在空中平台上安装RIS,可以实现丰富的视线和全区域覆盖,从而克服了传统地面RIS的局限性。我们考虑的情况下,突然增加的交通在城市地区触发当局迅速部署无人驾驶飞行器基站(UAV-BS)为地面用户提供服务。在这种情况下,由于来自地面源的直接回程链路可能由于来自市区的几个障碍物而被阻塞,因此我们建议使用空中RIS反射回程信号,以便它成功地到达UAV-BS。我们联合优化的布局和阵列划分策略的空中RIS和RIS元素的相位,这导致在每个UAV-BS的能量效率的增加。我们表明,我们的算法的复杂性可以限制的二次顺序,从而意味着高的计算效率。我们验证了所提出的算法的性能,通过广泛的数值评估,并表明,我们的方法实现了出色的性能,在能源效率相比,基准计划。

英文摘要:

In this paper, we propose a novel wireless architecture, mounted on a high-altitude aerial platform, which is enabled by reconfigurable intelligent surface (RIS). By installing RIS on the aerial platform, rich line-of-sight and full-area coverage can be achieved, thereby, overcoming the limitations of the conventional terrestrial RIS. We consider a scenario where a sudden increase in traffic in an urban area triggers authorities to rapidly deploy unmanned-aerial vehicle base stations (UAV-BSs) to serve the ground users. In this scenario, since the direct backhaul link from the ground source can be blocked due to several obstacles from the urban area, we propose reflecting the backhaul signal using aerial-RIS so that it successfully reaches the UAV-BSs. We jointly optimize the placement and array-partition strategies of aerial-RIS and the phases of RIS elements, which leads to an increase in energy-efficiency of every UAV-BS. We show that the complexity of our algorithm can be bounded by the quadratic order, thus implying high computational efficiency. We verify the performance of the proposed algorithm via extensive numerical evaluations and show that our method achieves an outstanding performance in terms of energy-efficiency compared to benchmark schemes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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