The effective integration of unmanned aerial vehicles (UAVs) in future wireless communication systems depends on the conscious use of their limited energy, which constrains their flight time. Reconfigurable intelligent surfaces (RISs) can be used in combination with UAVs with the aim to improve the communication performance without increasing complexity at the UAVs' side. In this paper, we propose a synergetic UAV-RIS communication system, utilizing a UAV with a directional antenna aiming to the RIS. Also, we present the link budget analysis and closed-form expressions for the outage probability as well as for an important second order statistical parameter of the proposed synergetic UAV-RIS communication system, the average outage duration. Finally, numerical results illustrate the effectiveness of the proposed synergetic system.

翻译：无人驾驶飞行器(无人驾驶飞行器)有效融入未来的无线通信系统取决于其有限能源的自觉使用,这限制了其飞行时间;可重新配置的智能表面(RIS)可与无人驾驶飞行器结合使用,目的是在不增加无人驾驶飞行器方面复杂性的情况下提高通信性能;在本文件中,我们提议建立一个协同型无人驾驶飞行器(UAV-RIS)通信系统,使用带有定向天线的无人驾驶飞行器(UAVA)通信系统;此外,我们还介绍了关于断电概率和拟议协同型无人驾驶飞行器(UAV-IRS)通信系统重要第二顺序统计参数(平均中断时间)的链接预算分析和封闭式表达方式;最后,数字结果显示了拟议协同型系统的有效性。