Train Redundant Network Structure for Communication Reliability
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Solution Overview
Problem
The existing train communication network (TCN) fails to ensure continuous communication between power units, leading to operational issues with electrical equipment when the network is down.
Innovation Solution
A redundant network structure is implemented using both backbone Ethernet and wired train bus for data interaction between power units, allowing communication to switch between these networks in case of failures, ensuring stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single train communication network (TCN) is used for data interaction between power units, then the device complexity is reduced, but the reliability of communication deteriorates when the network fails
Solution Approach 1:
The communication network is segmented into two independent channels: backbone Ethernet and wired train bus. Each channel can operate independently, and when one channel fails, the other continues to provide communication pathways, thereby segmenting the risk of total communication failure and improving overall reliability
Solution Approach 2:
A redundant wired train bus network is pre-established as a backup communication channel before the primary backbone Ethernet fails. This cushioning measure ensures that when the primary network fails, an alternative communication pathway is already in place, preventing communication interruption and maintaining system reliability
2Reliability
If redundant network structure with backbone Ethernet and wired train bus is implemented, then the reliability of communication is improved, but the device complexity increases
Solution Approach 1:
The power unit control devices are designed with multi-functionality to operate on both backbone Ethernet and wired train bus protocols. This universal design allows the same hardware to serve multiple communication functions, reducing the need for separate dedicated hardware for each network type and thereby managing complexity while maintaining redundancy
Solution Approach 2:
A network management intermediary layer is introduced that handles the complexity of dual network management, protocol conversion, and failover control. This intermediary abstracts the complexity from the core power unit operations, allowing the redundant structure to function seamlessly without burdening the primary control systems
3Duration of action of moving object
If automatic failover mechanism is implemented between backbone Ethernet and wired train bus, then the duration of action is improved during network failures, but the device complexity increases
Solution Approach 1:
The system performs preliminary actions by pre-configuring backup communication pathways and pre-establishing failover protocols before any network failure occurs. This includes pre-testing the wired train bus as a backup channel and pre-programming the failover logic, so that when failure occurs, the transition is immediate and seamless, extending communication continuity without requiring complex real-time decision-making mechanisms
Data Source
AI summary
A train network control system, method and device and a train. The system comprises at least two power units. The power units in the at least two power units carry out data interaction by means of a backbone Ethernet or a hinged train bus, respectively. According to the train network control system, method and device and the train provided by the embodiments of the present invention, the backbone Ethernet and the hinged train bus form a redundant network structure, so that the communication stability and reliability among the power units in the train are enhanced.