上海轨道交通LTE综合承载网络架构研究

Study on LTE Comprehensive Bearing Network Architecture of Shanghai Rail Transit

分析了上海城市轨道交通全自动运行线路对于LTE(长期演进)的网络需求,提出了LTE网络综合承载对网络架构的新挑战。为解决相关问题,在介绍基站共享技术和共享模式的基础上,提出通过MOCN(多运营商核心网)模式、共享载频实现轨行区基站的共享,并分别接入线路级数据核心网、线网级集群核心网的新型轨道交通LTE网络架构。结合该方案的工程实践,明确了LTE网络的组成和系统配置,从而满足了不同业务的无线传输需求,提高了系统的可用性。

The requirements of LTE network applied in Shanghai urban rail transit fully automatic operation lines are analyzed,and new challenges against network architecture caused by LTE network comprehensive bearing are demonstrated.In order to solve these problems,based on the base station sharing technology and sharing mode,a new rail transit LTE network architecture is proposed to realize the sharing of base stations in rail area by using MOCN mode and shared carrier frequency,and accessing to both EPC for data service of each line and EPC for broadband trucked communication.According to project application of this LTE network architecture,the composition and system configuration of LTE network are explicated,thus it satisfies the radio transmission requirements of different services and improves feasibility of the system.