TD-LTE Network Planning Research Of High-Speed Railway

High-speed railways are booming,and the operating mileage of high-speed railways is growing rapidly.With the continuous development of high-speed railway technology,the speed of high-speed trains has rapidly increased,travel conditions have gradually improved,travel costs have gradually decreased,and high-speed rail users are bound to increase in size.The ensuing communication needs on the road have become increasingly strong.How to meet the needs of the high-speed rail users for high-speed data service access during train operations is imminent.The TD-LTE communication system with low delay and high peak rate provides guarantee for solving the high-speed rail network coverage requirements.However,the high speed of the high-speed rail and the high breakdown loss of the carriage make it more difficult for network planning.It is necessary to focus on the planning process and take effective measures to solve it.In this thesis,the basic theory of TD-LTE,including basic concepts,key technologies and advantages,has been introduced.Combining with the characteristics of high-speed railways,the difficulties in its coverage are analyzed.Secondly,the principles and recommendations of the TD-LTE network planning for high-speed railway scenarios are given in terms of networking methods,capacity planning,coverage planning,site setting,and frequency selection.Then,a detailed solution was proposed for the difficulties in the coverage of high-speed rail communication networks.Finally,by combining the Hubei high-speed rail network construction,the networking schemes in different scenarios were clarified and refined,and the selection of CSFB(Circuit Switched Fallback)network and the construction of the project were underway.The power supply solution presents ideas and recommendations.In addition,the specific methods and steps of planning simulation are also introduced.Through the pre-positioning of the network optimization part,the refined network planning is realized.This thesis adopts a experimental analysis,theoretical research,research together,the basis accurate planning and reasonable network layout to ensure optimal network quality,it has a certain guiding significance for the construction of high-speed railway TD-LTE network in Hubei Province.