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Barry chasing China's first maglev train to carry Xinhua three runs!

2016-07-14 09:47:07 Author: Source:CTI ForumComment:0  Click:


On May 6, 2016, China's first low-speed magnetic levitation commercial operation demonstration line with completely independent intellectual property rights was officially opened in Changsha, Hunan. This marks that China’s maglev technology has achieved full coverage from R&D to application, and has become one of the few countries in the world to master this technology. Among them, the network solution of the CBTC vehicle-to-ground wireless communication system provided by the Xinhua Group has laid a solid foundation for its operation.
01 troubles: how to ensure the reliability of the signal
The medium and low speed magnetic levitation engineering line in Changsha has a total length of 18.55 kilometers. In the early stage, there were 3 stations and 2 reserved stations with a design speed of 100 kilometers per hour. At such a speed of chasing wind, how to ensure the stability and reliability of signal transmission has become a problem most concerned by railway constructors.
There are three key core technologies in traffic: traction, braking and signaling. Among them, the signal technology CBTC (communication-based automatic train control system) can achieve two-way communication through the vehicle/ground to achieve a flexible train operation control. The data transmitted in the wireless communication system of the CBTC vehicle is mainly based on train control commands and train monitoring information. The data flow is very small, and the maximum bandwidth does not exceed 100 Kb/s. However, the transmitted data are real-time key data, so this data is The high reliability of the transmission puts forward a very high requirement, and the car/ground wireless communication network needs to adopt a solution with high security and high reliability.
02 choice: Xinhua San, an independent innovation
As a leader in new IT solutions, Xinhua III has taken the lead in the industry in terms of technological innovation and independent intellectual property rights, and has always played an important role in China’s railway informatization construction. In major projects such as "4.18 large-speed supertank maintenance, remote monitoring" and other major projects such as "Qinghai-Tibet Railway" and "12306 Internet ticketing", Xinhua Sanbao's comprehensive and nationwide services are based on safe and reliable products. The system has been recognized by more and more railway users.
During the construction of China's first magnetic levitation train project, Xinhua San was involved in the planning stage. After full investigation and investigation, the H3C CBTC system solution was tailored for users and the network problems faced by the Changsha low-speed magnetic levitation engineering signal system were broken one by one. Let China's first medium- and low-speed maglev train run with confidence.
03 Xinhua III's Herald Cheats
AP field army resist complex environment
Xinhua San has deployed WA4320-TQ outdoor wireless access units as AP devices. The WA4320-TQ is an industrially enhanced dual-band device in the WA4320 series. It can adapt to harsh environments such as outdoor high and low temperatures, and is widely used in tunnels, overheads, and other scenarios. In addition, the project selected Xinhua three wireless controller WX5004 to manage all-line AP equipment, through a variety of technologies to ensure the system's high reliability and availability.
Dual-network parallel protection system with high reliability
The H3C CBTC system solution adopts the same two network configurations, but the physical isolation method is conducive to simultaneous transmission of control commands and vehicle monitoring information on the two networks. Even if a single network failure occurs, the entire CBTC system can still work properly. .
Dual controllers to avoid single point of failure of the controller
To achieve information synchronization, once the primary controller is disabled, the standby controller will replace the primary controller within 50ms. The AP will automatically transfer data from the backup tunnel to ensure that the wireless transmission is not interrupted and the single wireless controller solution is avoided. Single point of failure.
AP Seamless Switching during Fast Running Improves Network Performance Stability
In order to realize the deployment of subway wireless mesh networks, Xinhua III has customized the MLSP protocol (Mobile Link Switch Protocol) for the subway industry. The agreement is responsible for the active link switching during the movement of the train and ensures that no messages are lost during the handover, which effectively improves the stability of the network performance.
Customize wireless routing functions for onboard APs Reduce system complexity
In order to reduce the complexity of the onboard train network implementation and improve the ease of maintenance of the onboard terminals, Xinhua San has developed the routing function for the WA4320-TQ provided by the Changsha medium and low speed magnetic levitation engineering. The WA4320-TQ supporting the routing function can effectively achieve isolation between the vehicle network and the ground network. At the same time, it also makes it possible to unify the IP addresses of the vehicle network terminals of each vehicle.
China's first low-speed maglev train has begun its journey of catching up with winds. Xinhua’s new IT solution is also rapidly rushing toward a new era of railway science and technology independently developed by China. In the future, Xinhua 3 will continue to run on the road of innovation and practice, providing a steady stream of new IT wisdom for users of various industries.
Xinhua Third Group (abbreviated as “Xinhua”) is a world leader in new IT solutions. It is committed to the development, production, consulting, sales and service of new IT solutions and products. It owns a full range of H3C brand servers, storage, networks, Products such as security, hyper-convergence systems, and IT management systems can provide one-stop, full-scale IT solutions including large-scale interconnection, security, cloud computing, big data, and IT consulting services. At the same time, Xinhua III is also the exclusive provider of HPE branded servers, storage and technical services in China.
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