Unmanned Aerial Vehicle (UAV)-assisted Internet of Things application communication is an emerging concept that effectuates the foreknowledge of innovative technologies. With the accelerated advancements in IoT applications, the importance of this technology became more impactful and persistent. Moreover, this technology has demonstrated useful contributions across various domains, ranging from general to specific applications. Examples include wildfire monitoring, coastal area monitoring, deforestation monitoring, and sensitive military operations, where human access is limited or not feasible. These examples underscore the technology’s importance in scenarios where direct human involvement is challenging or impossible. Although this technology offers numerous benefits, it is essential to note that it also faces several challenges. Among these, Quality of Service (QoS) is a key concern, which limits its useability in various applications. Unfortunately, most researchers in the present literature have overlooked this important factor without giving it considerable attention. To fill this gap, we are presenting a systematic review of the present literature associated with the QoS metrics of this emerging technology from 2015 to 2023 to highlight their contributions and limitations. Based on the systematic review, we highlight the open challenges of this technology to set a roadmap for futuristic research. Finally, we compared each portion of this work with the previously published review articles to confirm the essence of this work, along with an explanation of why this survey is needed and in-time.

无人机辅助物联网应用通信是一个实现创新技术预见的新兴概念。随着物联网应用的加速发展，这项技术的重要性变得更加有影响力和持久性。此外，该技术在从一般应用到特定应用的各个领域都展现了有用的贡献。例如，人类进入受限或不可行的野火监测、沿海地区监测、森林砍伐监测和敏感军事行动。这些例子强调了该技术在人类直接参与具有挑战性或不可能的情况下的重要性。尽管这项技术提供了许多好处，但必须注意它也面临一些挑战。其中，服务质量（QoS）是一个关键问题，它限制了其在各种应用中的可用性。不幸的是，目前文献中的大多数研究人员都忽视了这一重要因素，而没有给予足够的重视。为了填补这一空白，我们对 2015 年至 2023 年与这一新兴技术的 QoS 指标相关的现有文献进行了系统回顾，以强调它们的贡献和局限性。基于系统回顾，我们强调了这项技术的开放挑战，为未来研究制定路线图。最后，我们将这项工作的每个部分与之前发表的评论文章进行了比较，以确认这项工作的本质，并解释了为什么需要及时进行这项调查。