中低运量轨道交通LTE专网带宽需求研究

Research on the Bandwidth Demand of LTE Special Network for Medium and Low Speed Volume Rail Transit

研究目的:为适应现代社会发展的不同需求,悬挂式单轨、中低速磁浮、山地齿轨等中低运量轨道交通应运而生。中低运量轨道交通采用LTE系统实现多业务的无线综合承载。本文分析了车地无线通信的业务特点和带宽需求,提出了车地无线通信带宽需求计算方法和提出了不同带宽资源下的业务综合承载方案。研究结论:(1)中低运量轨道交通无线通信系统可充分考虑资源整合和降低造价等因素,没必要像铁路和地铁等大运量轨道交通那样繁杂,采用单个LTE系统代替传统的TETRA、WLAN等多个系统,实现多业务的综合承载;(2)针对中低运量轨道交通运营模式,分析了车地无线通信业务特点和带宽需求,并根据LTE系统本身可提供的容量限制,给出了在5 MHz、10 MHz、15 MHz和20 MHz不同带宽资源下,LTE专网业务承载方案建议;(3)本文的研究成果对悬挂式单轨、中低速磁浮、山地齿轨等中低运量轨道交通LTE无线通信系统的建设有一定的指导意义。

Research purposes: In order to meet the different needs of the development of modern society,suspended monorail,medium and low speed maglev,mountain rack rail and other medium and low volume rail transit came into being. LTE system is used in medium and low volume rail transit to realize multi-service wireless integrated bearing.This paper analyzes the service characteristics and bandwidth requirements of wireless communication,gives the calculation method of wireless communication bandwidth requirement and the suggestions of LTE network service carrying scheme under different bandwidth resources.Research conclusions:(1) The wireless communication system of medium and low volume rail transit can fully consider the factors such as resource integration and cost reduction,so it is not necessary to be as complicated as the rail and metro rail transit with large volume. A single LTE system is used to replace the traditional TETRA,WLAN and other systems to realize the comprehensive carrying of multiple services.(2) According to the operation mode of medium and low volume rail transit,this paper analyzes the characteristics and bandwidth requirements of wireless communication service,and according to the capacity limitation that LTE system can provide,it gives the suggestions of LTE network service carrying scheme under different bandwidth resources of 5 MHz,10 MHz,15 MHz and 20 MHz.(3) The research results have certain guiding significance for the construction of LTE wireless communication system of suspended monorail,medium and low speed maglev,mountain rack rail and other medium and low volume rail transit.