A heterogeneous network architecture for high-speed trains

By adopting a heterogeneous network architecture in EMU trains, and utilizing fiber optic serial ring network channels and dual-ring network topology design, the problems of poor transmission reliability and real-time performance in the network architecture of EMU trains have been solved, and high-reliability and high-bandwidth data transmission has been achieved.

CN116708078BActive Publication Date: 2025-12-02CHINA STATE RAILWAY GRP CO LTD +4
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Patent Information

Application Number
CN202310511567.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-08
Publication Date
2025-12-02
Estimated Expiration
2043-05-08

AI Technical Summary

Technical Problem

The existing network architecture of high-speed trains is unable to meet the transmission requirements of high-bandwidth data and is susceptible to electromagnetic interference, resulting in poor network transmission reliability and real-time performance.

Method used

The heterogeneous network architecture of the EMU train is adopted, including forming a vehicle-level Ethernet within the traction unit and a train-level backbone network between the two traction units. A ring network channel is formed by connecting optical fibers, and redundant data transmission and high reliability are achieved through a dual-ring network topology and a dual-port redundancy design for subsystems.

Benefits of technology

It improves the reliability and real-time performance of network transmission, meets the transmission requirements of high-bandwidth traffic data, and ensures normal network communication even when a single channel fails.

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Abstract

This specification provides a heterogeneous network architecture for high-speed trains. This heterogeneous network architecture includes: a vehicle-level Ethernet network comprising multiple vehicle-level Ethernet nodes, which are connected in series in a ring network to form a first channel and a second channel. The first channel is connected to the first network port of the subsystem, and the second channel is connected to the second network port of the subsystem. The train-level backbone network comprises four train-level backbone network nodes. Two train-level backbone network nodes are installed in each of the first and eighth carriages of each traction unit, and these two nodes are connected to the first and second channels, respectively. The train-level backbone network nodes interact with the vehicle-level Ethernet nodes through a backplane. Based on this network architecture, network transmission reliability can be improved while optimizing real-time and redundancy requirements, further meeting the transmission needs of high-bandwidth data services.
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