Mathematical framework for 5G‐UAV relay,Transactions on Emerging Telecommunications Technologies

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Mathematical framework for 5G‐UAV relay
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2021-01-05 , DOI: 10.1002/ett.4194
Shah Khalid Khan ₁

Affiliation

Unmanned aerial vehicle's (UAVs) small size, long‐lasting battery, and flexible trajectory have produced widespread applications in radio communication systems, especially its usage as a cellular tower (gNB) for 5G services. At the same time, the mmWave's enormous available bandwidth makes it the primary contender for next‐generation communication networks. This article aims to synthesize and assess the usage of mmWave concurrently in backhaul and access links for amplify‐and‐forward (AF) relay installed on the UAV. A mathematical framework is developed for the received power of the user equipment (UE) obtained in relay path (gNB‐UAV‐UE) and direct path (gNB‐UE) via; (i) free space, and (ii) log‐distance path loss model. The International Telecommunication Union recommended city model is used to assess the likelihood for LoS and NLoS paths in four urban environments; (i) high‐rise urban, (ii) dense urban, (iii) urban, and (iv) suburban. Furthermore, various parameters, that is, UAV's position and amplification factor are stipulated to optimize the efficiency of a UAV‐based AF relay for enhanced users coverage.

中文翻译：

5G‐UAV中继的数学框架

无人机（UAV）的小尺寸，持久的电池和灵活的轨迹已在无线电通信系统中得到了广泛的应用，尤其是将其用作5G服务的蜂窝塔（gNB）。同时，mmWave的巨大可用带宽使其成为下一代通信网络的主要竞争者。本文旨在综合和评估mmWave在回程和接入链路中同时用于无人机上安装的放大转发（AF）中继的使用情况。为通过中继路径（gNB-UAV-UE）和直接路径（gNB-UE）获得的用户设备（UE）的接收功率开发了数学框架；（i）可用空间，和（ii）对数距离路径损耗模型。国际电信联盟推荐的城市模型用于评估四种城市环境中LoS和NLoS路径的可能性；（i）高层城市，（ii）密集城市，（iii）城市，和（iv）郊区。此外，规定了各种参数，即无人机的位置和放大系数，以优化基于无人机的AF中继的效率，以增强用户覆盖范围。

更新日期：2021-03-15

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