Research And Design Of Uav High-Definition Video Wireless Transmission System Based On 5G Network

5G technology is the fifth generation of mobile communication technology.Compared with 4G,the bandwidth is larger and the speed is faster.5G communication technology further promotes the rapid development of the mobile Internet and meets the needs of all aspects of society for communication technology in the future.4G changes life and 5G changes society.5G technology has important value and significance for china’s information development,internet development and national defense security.The development of 5G technology also promotes the development of fixed-wing UAV.Related technologies are related to national security.The combination of 5G technology and fixed-wing UAV is a very important part of the national development strategy.This topic focuses on the large application background of the combination of 5G technology and fixed-wing UAV,specifically for the real-time backhaul of video data and the storage requirements of video data for fixed-wing UAV,researches and designs a set of real-time video transmission system based on 5G network.The video data returned in real time will directly affect the formulation of relevant activity strategies and thus the success or failure of activities.The stored video data can be used for post-event analysis,which has guiding significance for the formulation of subsequent activities.In view of the real-time problem of video data transmission,this paper no longer adopts the traditional method of compressing video data before transmission,but uses the large bandwidth characteristics of5 G to realize the direct transmission of original video data,thus the delay brought by the video codec to the system is eliminated,and the real-time performance of the system video transmission is improved.In view of the storage problem of video data,the system of this subject does not directly store the original video data,the amount of original video data is large,and there is a lot of redundant information,and the direct storage of it consumes huge disk space,the cost is high,and a lot of unnecessary disk space is wasted.Instead,the subject system saves the H.264 compressed video data,which not only realizes the effective preservation of video data,but also saves disk space and costs.The main research contents are as follows:(1)According to the actual project requirements,the relevant theoretical knowledge points required for the system design of this subject are analyzed and studied.The first is an overview of 5G technology,and then the 5G networking architectures NSA(non-independent networking)and SA(independent networking)are analyzed and compared.Secondly,it introduces the relevant contents of the Linux operating system,including the characteristics of the Linux operating system,the layered architecture of the Linux operating system software and the startup process of the Linux operating system.Finally,the relevant theory of H.264 compression algorithm is studied and analyzed,including the basic principle of video compression,the overall structure of H.264,the principle of H.264 encoder and decoder.(2)Based on the research and analysis of project requirements and related knowledge points,the software and hardware architecture of the system is first designed.The overall system architecture adopts the C/S(Client/Server)model,and the C-side(client)includes:the 5G video transmission device and the back-end video playback equipment,the S-side(server-side)is a remote Linux server.Then carry out the specific practical design of each part,in which the 5G video transmission device is responsible for collecting the camera video data and uploading it to the remote Linux server through the 5G network in uncompressed(original video data upload)and compressed(H.264 compressed upload)methods,respectively.The Linux server realizes real-time forwarding of original video data and storage of compressed video data,and the back-end video playback device receives the original video data forwarded by the server and plays it in real time.At the same time,the back-end video playback device can also send control commands to the 5G video transmission device through the forwarding of the remote Linux server to control the state of the 5G video transmission device.(3)Finally,the integration test of the system is carried out,and then experiments are carried out under 5G SA(5G independent networking),5G NSA(5G non-independent networking)and 4G network respectively,and the experimental data are recorded.The experimental results show that the system designed in this subject meets the design index of the subject,and realizes the real-time return and effective storage of video data.