Wireless Network Planning And Design Of Guangzhou Metro Line A

With the acceleration of urbanization in China,a large number of problems have been gradually produced.The subway system plays a vital role in the urban development.It has the advantages of low energy consumption,environmental protection,high efficiency,speediness and so on.With the rapid development of the subway system,a set of appropriate wireless signal coverage solution is required.The system is designed to meet the growing demand of communication environment from passengers,by improving the quality of communication system.Meanwhile,it can also increase traffic peak to bring more profit.Therefore,it can bring great effect to society and its economic interest.In this paper,the wireless network coverage scheme of the metro civil mobile radio communication is explored in depth,and the feasibility of the method is demonstrated by the engineering practice of Guangzhou Metro Line A.The main researching content of this paper is as follows:Ⅰ.Presenting the wireless signal propagation loss,link budget theory and propagation model,provides fundamental basis for this article,combined with the wireless network coverage case of the metro civil mobile radio communication to prove the practical significance of this research work.Ⅱ.This paper discusses the necessity and feasibility of using POI muti-path system to carry out the civil communication coverage of the subway system,as well as the system architecture,network planning,coverage design and link calculation of the civil radio communication system.The principle of the trans-regional switching mechanism and handover area setting for the passenger in the tunnel is comprehensive analyzed.Ⅲ.This thesis probes into the realization of the civil communication system of subway system,including cell switching,coverage index calculation and performance analysis.Ⅳ.The designed interference problem of metro wireless network is discussed.The spurious interference,blocking interference and intermodulation interference are analyzed and demonstrated respectively.Ⅴ.Based on the status of civil radio communication system of Guangzhou Metro Line A,the networking scheme of metro public wireless communication system,using multi system platform,is walked through: using the multi system access platform to combine the signals of different operators,then the antenna system for transmission and radiation,makes the wireless signal cover multiple areas without dead angle,such as the platform layer,business layer etc.