Performance Simulation And Analysis Of LTE System In Rail Traffic

In recent years,China's rail transit construction industry has developed rapidly.High-speed railway communication standards are being updated,and the latest communication standards for urban rail transit have been officially released before.In order to meet the user's requirements for communication service quality better while taking rail transit,to solve existing problems or to predict and prevent possible problems,it is necessary to carry out detailed simulation and analysis of the performance of the rail transit broadband mobile communication system.This paper mainly relies on the LTE TDD system performance simulation platform written by the research team members,as well as the research on various wireless channel models and the channel model simulation methods.Simulate and analyze system performance of the open space SFN scenarios and tunnel LCX coverage scenarios under SISO channel condition,then provide suggestions for SFN deployment and LCX deployment.In addition,the characteristics of 1-LCX MIMO channel are simulated and analyzed,then provide recommendations for LCX deployment.The main contents are as follows:(1)Research the simulation platform,master the basic functions,and set the corresponding parameters to meet the simulation requirements;(2)Select 1-path,2-path,2-path Rice channel models in open space SFN scenarios,analyze channel characteristics,study channel simulation methods,design simulation cases,simulate LTE system performance and analyze the results,then provide SFN deployment recommendations;(3)Select 1-path deterministic,1-LCX MIMO deterministic,1-LCX MIMO Rice channel models in tunnel scenarios,analyze channel characteristics,study channel simulation methods,design simulation cases,simulate LTE system performance or channel characteristics and analyze the results,then provide recommendations for LCX deployment.Determine the applicability of MIMO technology in tunnel LCX coverage scenarios,and the feasibility of implementing MIMO transmission with single LCX.The research results of this paper can be applied to rail transit scenarios,mainly public network of LTE systems in open space and tunnels.