Research On Transmission Themes For Unmanned Aerial Vehicles Under 5G Network

With the mature of drone related technologies such as materials and positioning,and the growing demand for consumer-grade drones represented by multi-rotor drones,the drone industry has developed rapidly in recent years.In addition,in order to cope with the diversified emerging business forms and the explosive growth of data traffic scale and terminal connections,the research and development of 5G networks has entered the fast lane,and it is expected that 5G large-scale commercialization will be realized by 2020.The high reliability,low latency and high transmission rate provided by the 5G network will inject new vitality into the development of the drone industry.The research work in this paper mainly includes coverage enhancement scheme based on Large-scale antenna array and dedicated base stations,research on interference mitigation scheme based on power control,research on interference mitigation scheme based on directional antennas,and interference mitigation scheme based on coordinated multi-point transmission.The system-level simulation platform performs system-level performance evaluation on the above schemes.The main contributions and innovations of the thesis are as follows:Firstly,the UAV channel modeling is carried out according to the relevant protocols proposed by the 3GPP standardization organization and the UAV system-level simulation platform is built.Secondly,the coverage enhancement scheme based on large-scale antenna and dedicated base station is studied.The 5G network supports large-scale antenna technology and flexible 3D beamforming,which can effectively enhance the coverage of drones.At the same time,the subject also evaluates the support of 5G networks for UAV service requirements and the UAV performances under different base station parameters.In addition,this thesis studies the interference mitigation scheme based on power control,and proposes an improved power control scheme based on altitude grouping and RSRP for UAVs.The simulation proves that the scheme can effectively reduce the interference of drones on ground user services..At the same time,the antenna-based interference mitigation scheme is proposed,which verifies the impact of different antenna beamwidth and LOS track tracking capability on user performance.The simulation results show that the scheme can effectively reduce the interference of drones to neighboring cell users.Finally,the interference mitigation scheme based on coordinated multi-point transmission is studied.The simulation verifies the effectiveness of the coordinated multi-point transmission scheme for reducing UAV interference.