| China’s economy and people’s living standards have gradually improved in recent years,informatization,rapid,convenient has gradually become the development theme.The construction and opening of high-speed railway also means that our transportation network has been upgraded qualitatively.But the following is also the operator of high-speed railway coverage problems,specifically: high-speed railway train operation speed,train compartment closure is good,which will cause Doppler frequency shift,cell switching,inadequate capacity and other issues.Therefore,reduce construction costs,operating costs,effective use of network resources,the use of new networking methods for high-speed railway coverage.With the smallest construction funds in exchange for the greatest benefits,and maintain good customer satisfaction,has become the focus of attention of operators.This paper takes the coverage problem of high-speed railway as the research object,explains the system architecture and key technologies of LTE technology,and introduces the process and method of network optimization planning.According to the technical requirements of TD-LTE technology,the implementation scheme of TD-LTE networking technology for high-speed railway is formulated,which includes nine parts: frequency selection,subframe planning,station configuration,antenna settings,PCI settings and IP address settings.In addition,the setting scheme of OMC-R is also considered.After the completion of the network,according to the data of Baolan High-speed Railway,such as business demand and traffic analysis,this paper introduces six wireless network optimization parameters,such as power control parameters,mobility management parameters,neighborhood and interoperability parameters,to test the TD-LTE network of Baolan High-speed Railway on the spot.The measured data are compared with the current network indicators,and the optimized test results are analyzed.Finally,this optimization is summarized and prospected. |
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