Toward Optimal Deployment of UAV Relays in UAV-Assisted Internet of Vehicles

软件部署 继电器 计算机科学 无线 吞吐量 水准点(测量) 实时计算 利用 钥匙(锁) 发射机功率输出 计算机网络 功率(物理) 电信 计算机安全 发射机 大地测量学 地理 频道(广播) 物理 操作系统 量子力学
作者
Yuhan Su,Minghui Liwang,Zhong Chen,Xiaojiang Du
出处
期刊:IEEE Transactions on Vehicular Technology [Institute of Electrical and Electronics Engineers]
卷期号:72 (10): 13392-13405 被引量:6
标识
DOI:10.1109/tvt.2023.3272648
摘要

The past decade has witnessed an explosive growth of unmanned aerial vehicles (UAVs), which have attracted great attention in assisting Internet of Vehicles (IoV) communication systems thanks to the advantages of cost-effectiveness, high maneuverability, and flexible deployment. Yet several issues, such as UAVs' transmit power and energy resources as well as the high-speed mobility of IoV user equipment (VUE), pose challenges to the development of UAVs in UAV-assisted IoV. To provide reliable and high-throughput wireless links for VUEs in a given ground area, this article considers a scenario in which a ground VUE is facing difficulties in receiving service from a ground roadside unit (RSU) owing to possible sudden RSU malfunction or poor signal coverage. In this case, UAVs are generally deployed in the air, serving as relays to establish communication links between uncovered VUE and the neighboring RSU. To maximize the system capacity, we investigate the deployment problem of UAV relays under single-UAV relaying and multi-UAV relaying cases upon considering VUE mobility, and exploit the optimal deployment strategy of UAV relays under fixed total power consumption. Comprehensive simulation results verify that the proposed algorithm can outperform benchmark methods on significant critical indicators such as the average achievable user rate, and the outage probability. Also, evaluations and analyses have highlighted the effects of key system parameters (e.g., altitude, number, and transmit power of UAV relays) on optimal UAV relay deployment position and system performance.
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