地铁传输系统MAC地址问题研究

针对地铁传输系统对PIS(乘客信息系统)的MAC地址进行识别和处理,导致PIS车载显示效果不佳这一现象,通过实地测试,分析数据,得出问题产生的原因。讨论相关解决方案并说明VPLS(虚拟专用局域网业务)技术在实际案例中的缺陷,论证PIS交换机单独组网方案的可行性,引入MLSP(移动链路交换协议)和RRPP(快速环网保护协议)等技术措施并说明该技术在系统中的功能。提出实际工程中的系统组网方案及设备配置方案,并对PIS单独组网的投资和收益进行比较,从而得出推荐的方案,为同行在设计城市轨道交通乘客信息系统时提供借鉴和参考。

On How Metro Transmission System Learns Media Access Control (MAC) Address

The Media Access Control (MAC) address of Passenger Information System (PIS) is identified and processed by the Metro Transmission system, leading to the latter having a poor display effect on the train. This study determined the cause of the problem through field tests, analyzed related data, discusses related solutions, and explains the defects of Virtual Private Lan Service (VPLS) technology in actual cases. This paper demonstrates the feasibility of an individual network scheme for a PIS switch, introduces advanced technical measures such as mobile link switch protocol (MLSP) and Rapid Ring Protection Protocol (RRPP), and explains how the technology works in the system. The system networking and equipment configuration schemes in the actual project are explained, the investment and income of individual networks of the PIS compared in detail, and a new scheme is recommended to provide a reference for other researchers working on designing passenger information systems for urban rail transit.