基于通信的列车运行控制系统中无线干扰分析与仿真

Analysis and Simulation of Wireless Interference in CBTC System

为了保障CBTC(基于通信的列车运行控制)系统安全可靠地运行,分析了干扰对CBTC系统中车地无线通信的影响。运用OPNET软件仿真,搭建出地面干扰和车载干扰情况下列车运行的场景;通过调试仿真,得到反映通信系统性能的吞吐量、接收延时等信息;最后比较了不同情况下干扰对CBTC系统的影响。由此提出了对干扰的防范措施:合理规划无线频段;加强对民用通信系统的管理;改善CBTC信号系统,提高信噪比。

The ncgativc influences of intcrfcrencc on train/ ground wireless communication subsystem of CBTC （communica- tion b^tsed train control） is invttigatcd, to ensure safc and relia- ble operation of C~. A modcl is established by OPNEF tech- nology, including both the ground interfcrence scenario and train interfcrcnce scenario. From this simulation, the throughput, delay and other key information to the communication system pcr- lormancc arc obtained. Some mcasur~ are pro~ by compa- ring the cffccts of CBTC in diffcrcnt situations ag^linst the intcr- fcrenct.~s.