Technical Solution for Enhancing Signal Forwarding Performance of Train Backbone Network Switch Machines Based on FPGA Multi-level Switching Architecture
［Objective］ The transmission services carried by urban rail transit communication networks are becoming increasingly diverse, leading to a significant volume of information exchange between communication devices. This imposes higher performance requirements on ETB (ethernet train backbone) switch ma...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Urban Mass Transit Magazine Press
2025-02-01
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| Series: | Chengshi guidao jiaotong yanjiu |
| Subjects: | |
| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.02.033.html |
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| Summary: | ［Objective］ The transmission services carried by urban rail transit communication networks are becoming increasingly diverse, leading to a significant volume of information exchange between communication devices. This imposes higher performance requirements on ETB (ethernet train backbone) switch machines. The signal forwarding performance of switch machines directly determines their data transmission capacity, making it necessary to study signal forwarding performance improvement measures for ETB 3-layer switch machines. ［Method］ The vehicle project on Los Angeles Metro Red Line is taken as research object, and the communication network topology of metro trains on this line is introduced. Starting with an analysis of the throughput requirements for ETB switch machines, an ETB 3-layer switch machine based on an FPGA (field-programmable gate array) multi-level switching architecture platform is developed. The signal forwarding performance of the developed switch machine is tested to verify its effectiveness. ［Result & Conclusion］ The ETB data transmission requirement is approximately 44 Mibit/s, which cannot be met by the configurations of vehicles on metro lines from earlier development. The FPGA multi-level switching platform effectively balances the load between intermediate modules and enhances the throughput of ETB switch machine. The developed ETB 3-layer switch machine has a network throughput of up to 90 Mibit/s, adequately meeting the data transmission needs of Los Angeles Metro Red Line vehicles. |
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| ISSN: | 1007-869X |