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Case Rail Transit
说明: BackgroundSubway Main Control System is used to share resources, and communication by construction of unified hardware platform; by integration of interconnection system to realize integrate and interconnect, using concentrated information to serve passengers and subway company; such as environment and equipment monitoring system, automatic fire alarm system, shielded gate access control system, broadcasting system, CCTV system, urgent evacuation system. Looped network topology is required, and high-reliable, real-time, convergence, compatibility are required, considering the control of broadcast domain and safety, we usually use 3 layers communication network for subway main control system.RequirementsThe operation of subway, can not without the monitoring system, real-time broadcasting s...
说明: BackgroundRail transit is consist of many subsystems , such as rail route, stations, trains, maintenance base, power supply and transformation, communication transmission, command-and control; data communication among notes need a reliable, uninterrupted, high-bandwidth, high-redundant, compatible, and manageable backbone network. And, the communication between systems also need high-reliability, compatibility, manageability, hardware can resist thunder interference, temperature variation, dust, and vibration are required; software should have the abilities of hacker attack resistance, access filtration, safe channel protection.RequirementsSubway operation need a backbone network with the features of reliability, redundancy, safety, compatibility to connect OA system of every station, vide...
说明: BackgroundPolice Communication Network should meet with the requirements of voice, data, image service of subway police office, Police Communication Network is the extension of national police communication. Police Communication Network includes transmission subsystem, wireless communication subsystem, computer network subsystem, telephone subsystem, monitoring subsystem and power supply subsystem.RequirementsPolice Communication Network is a transmission platform of providing data and video information between subway police station and subway stations, meanwhile, interconnected with city police computers, data communication is available. The system installed in good place, but still required high reliability and high-stability; Police Communication Network should connect with external Int...
说明: BackgroundAFC(automatic fare collection system)is an automatic ticket selling and checking system, which based on computer technology, information collection and processing, machine manufacturing. AFC functions including ticket selling, collection, charging, statistics, clearing, and management. AFC help to improve the operation efficiency and benefits of subway system for subway operators. As the basic and important system of subway operation systems, AFC require reliable communication network.RequirementsBecause of the features of subway like long running time, high speed, and openness, every station passengers passing rate is high, tickets selling and checking times is very frequent. AFC communication system should have mechanism of fast response. Reliability, stability, extra long MTB...
说明: BackgroundWith the development of WLAN mobile communication technology, the subway train can keep uninterrupted communication with ground control center at the speed of 120KM/h, that makes PIS system is possible, modern PIS system, besides display text information of passenger notice or train schedule in carriage, and also can play stock information, media news, live games, advertisements etc. In case of emergency, such as fire, block and terrorist attack, PIS system can provides dynamic guidance for urgent evacuation. PIS as a visual communication platform between subway operator and passengers, all of the media flow can not appear mosaic images, voice not smooth, this is required wire network, train-ground wireless network have enough bandwidth and good QOS protection mechanism, meanwhil...
说明: BackgroundPower system is the important component of rail transit operation, so the high-reliability is required. Rail train apply to electrical system is based on 3rd track technology of high voltage circuit. Deploy traction substation power supply for 3rd track, vehicle-mounted devices and service devices. The power system equipped with various intelligent monitoring and emergency shutdown system, maximum decrease the effect of emergency, enable power supply reliable and continuous. RequirementsIndustrial design, equipment operating resist rugged surrounding of strong electromagnetic interferenceEfficient, reliable network redundant backbone transmission systemQuick backbone looped network couple topology with sub looped networkPrecise power monitoring control system, power supply to tra...
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