In this paper, we present an analytical framework to explore the interplay of signal interference and transmission queue management, and their impacts on the performance of unmanned aerial vehicles (UAVs) when operating in the unlicensed spectrum bands. In particular, we develop a comprehensive framework to investigate the impact of other interference links on the UAV as it communicates with the ground users. To this end, we provide closed-form expressions for packet drop probabilities in the queue due to buffer overflow or large queuing delay, which are expressed in terms of a transmission policy as a function of the channel fading threshold $\beta$. The overall packet loss caused either by interference signals or queuing packet drop is obtained, which, in turn, yields in obtaining the expected throughput performance. Through extensive numerical results, we investigate the impact of the channel fading threshold $\beta$, which plays an important role in balancing the trade-offs between packet loss due to queue drop or transmission error due to large interference levels.

翻译：本文提出一种分析框架，探究信号干扰与传输队列管理之间的相互作用，及其对无人机在非授权频谱带中运行时性能的影响。具体而言，我们构建了一个综合框架，研究其他干扰链路对无人机与地面用户通信时的影响。为此，我们给出了因缓冲区溢出或较大排队延迟导致的队列中数据包丢弃概率的闭式表达式，这些表达式以传输策略的形式表示，并作为信道衰落阈值 $\beta$ 的函数。我们得到了由干扰信号或排队数据包丢弃引起的总数据包丢失，进而获得期望的吞吐量性能。通过大量数值结果，我们研究了信道衰落阈值 $\beta$ 的影响，该阈值在平衡因队列丢弃导致的数据包丢失与因较大干扰水平导致的传输错误之间的权衡中起着重要作用。