Research On System-level Simulation Capability Of Unmanned Aerial Vehicle Communication

The UAV communication system has the advantages of high mobility and flexible deployment.It can supplement coverage and increase capacity in emergency scenarios and hotspot areas.Therefore,it has received extensive attention from academia and industry in recent years.However,the current system-level simulations for UAV communication systems are mostly aimed at the scene where the users are stationary,and there is a problem of inaccurate performance evaluation in the scene where the users are moving.To this end,this thesis first designs a resource scheduling method for UAV communication systems based on Statistical Prioritybased Multiple Access(SPMA),and simulates and verifies the impact of the algorithm on system performance such as system throughput and endto-end delay;secondly,a system-level simulation platform and demonstration platform for UAV communication in user mobile scenarios are built,and the proposed resource scheduling algorithm and UAV trajectory optimization algorithm are evaluated,the influence of factors such as UAV base station service height,user moving speed,user switching configuration,antenna system and other factors on system performance achieved by the proposed resource scheduling algorithm is verified by simulation.The main work and innovations of this thesis are as follows:1.Network performance analysis and optimization of UAV communication system in user mobile scenario.Aiming at the differentiated performance requirements in the scenarios of mobile users,a resource scheduling method based on SPMA is proposed,and the system performance indicators such as system throughput and average end-to-end delay of the proposed method are simulated and analyzed;Meanwhile,based on Reference Signal Receiving Power,reference signal receiving power(RSRP)weighted average method optimizes the trajectory of the UAV.Simulation results show that,compared with typical comparison schemes,the proposed resource scheduling scheme can effectively improve system throughput and reduce end-to-end delay.2.System-level simulation performance study of UAV communication.This thesis design a system-level simulation platform for UAV communication,including network topology,frame structure,channel model,user mobility and handover,resource scheduling,adaptive modulation and coding,hybrid automatic repeat request,antenna and platform architecture,etc,on this basis,the proposed SPMA-based resource scheduling algorithm and UAV trajectory control algorithm are designed and verified,and the simulation results confirm the effectiveness of the algorithm.Based on this platform,the influence of different antenna systems,switching configurations and other parameter settings on the performance of the UAV communication system is further explored.Simulation results show that the number of antennas has a significant impact on system performance.Compared with the handover method based on access distance,the handover method based on RSRP has a greater improvement in system throughput.