Electronic public transportation system focusing on the high safety serves as a necessary condition for urban internationalization. Modernization of public transportation system has become one of important symbols for urban construction and land development. IP monitoring systems are established at such places as metro station to provide camera monitoring services, including monitoring and recording of passenger images captured by IP camera provided in each carriage. Furthermore, passengers can also enjoy their preferred TV, videos and advertisements in the journey.
TCP/IP network communication serves as the major mode for equipment communication, which makes use of redundant ring network topological structure based on the industrial Ethernet technologies to ensure the uninterrupted operation of the system.