【作者】 赵鹏；

【导师】 罗晶晶；

【作者基本信息】 哈尔滨工业大学 ， 信息与通信工程， 2022， 硕士

【摘要】 无人机对于危险、复杂、不可达的任务具有无法代替的优越性。近年来随着蜂窝网络通信技术的高速发展,将无人机拓展到蜂窝网络中得到越来越多研究者的关注。蜂窝网络无人机在一定程度上能够解决传统无人机的飞行场景受限、认证管控困难、通信频段限制等问题。并且能够通过蜂窝网络技术的发展迭代为无人机带来更多功能升级。目前蜂窝网络无人机的研究仍然存在许多问题。蜂窝网络信道条件复杂,现有的研究者们主要集中在理论分析与仿真模拟结果上,真实系统数据较少,控制研究较为局限。蜂窝网络无人机挑战依然严峻。针对现有问题,研究设计蜂窝网络无人机三端应用系统,提出了控制信令传输算法,基于通道指令映射与网络协议优化在实现有效传输的同时提升了可靠性;针对回程链路设计了数据通信调度算法,对复杂集中的多维数据合理传输并解析可视化,全面保障了蜂窝网络无人机通信;同时研究设计非阻塞链式传输方案,降低了视频流的传输延迟,实现了蜂窝网络无人机视频流实时传输;此外还聚焦于真实场景中商用LTE和5G网络无人机的延迟测量,测量在郊区环境和城市环境两种典型场景下进行,结果显示了不同的延迟行为。通过分析不同参数对延迟性能的影响,发现平均延迟与信号干扰噪声比高度相关,而延迟波动与切换频率密切相关。以上研究可以为空中用户拓展到蜂窝网络提供一定的指导。更多还原

【Abstract】 Unmanned Aerial Vehicle has irreplaceable advantages for dangerous,complex,and unreachable tasks.In recent years,with the rapid development of cellular network communication technology,more and more researchers pay attention to extending UAVs to the cellular network.To some extent,the cellular network UAV can solve the problems of limited flight scenarios,difficult certification management and control,and the first communication frequency band of the traditional UAV.And it can bring more functional upgrades to UAVs through the development iteration of cellular network technology.At present,there are still many problems in the research of cellular network UAVs.The channel conditions of cellular networks are complex.The existing researchers mainly focus on theoretical analysis and simulation results.The real system data is less,and the control research is more limited.The challenge of cellular UAVs is still severe.This paper addresses the existing problems,researches and designs the cellular network UAV triple-ended application system,and proposes a control signaling scheduling logic algorithm,which reduces the control transmission delay while guaranteeing reliability based on channel command mapping and network protocol optimization.The data communication scheduling logic algorithm is designed for the backhaul link,and the complex and concentrated multi-dimensional data is transmitted and analyzed and visualized rationally to fully guarantee cellular network UAV communication.Meanwhile,the research and design of a non-blocking chain transmission scheme greatly reduces the transmission delay of video streams and realizes the real-time transmission of UAV video streams in cellular networks.we contribute to this emerging area by focusing on delay measurements of drones connecting to commercial LTE and 5G networks in real-world scenarios.Measurements are carried out in two typical scenarios,i.e.,suburban environment and urban environment.Different delay behaviors are observed in these two scenarios.By analyzing the impact of different parameters on delay performance,we find that the average delay is highly related to SINR,while the delay fluctuation shows a strong relation to handover frequency in both scenarios.The gained insights could provide some guidelines for integrating aerial users into cellular networks.更多还原