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In-vehicle Ethernet switch for rail vehicle, signal transceiver and train reconnection method

A technology of Ethernet and switch, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of small bandwidth, unable to transmit in time, unable to meet the large bandwidth requirements of train control and information service transmission, and achieve simplified configuration and maintenance operations, lower production costs, and faster transfer rates

Inactive Publication Date: 2018-06-08
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of trains in the direction of safety, reliability and intelligence, the bandwidth of the existing rail vehicle control network is small, which cannot meet the large bandwidth requirements of train control and information service transmission
And the traditional EMU control network mainly uses WTB bus and MVB bus, the bandwidth of which is only 1Mbps and 1.5Mbps respectively, and mainly transmits train control (such as traction control, brake control, auxiliary control, door control, etc.) data, while for train status Data, train diagnostic data, train maintenance and other data cannot be transmitted in time due to bandwidth limitations, which greatly affects the maintainability and availability of train information transmission
And with the continuous expansion of train network applications, such as the diversification of train information services, more and more information needs to be transmitted on the train network. The bandwidth of the traditional train WTB / MVB network can no longer support the transmission requirements of such large-capacity data.

Method used

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  • In-vehicle Ethernet switch for rail vehicle, signal transceiver and train reconnection method
  • In-vehicle Ethernet switch for rail vehicle, signal transceiver and train reconnection method
  • In-vehicle Ethernet switch for rail vehicle, signal transceiver and train reconnection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] see figure 1 , a vehicle-mounted Ethernet switch for rail vehicles, including a power supply module, a CPU module, a switch module, an Ethernet transceiver module, a front backplane module and a backplane module;

[0054] The power supply module is connected to the backplane module to supply power for the CPU module, switch module and Ethernet transceiver module;

[0055] The structure diagram of the power module is as follows: figure 2 , The power module includes 2 independent EMC protection circuits and a front-end power module, with 2 redundant inputs, when one power supply circuit fails, the other power supply circuit can provide power to improve the safety of power supply. The power module provides +5V and +3.3V DC voltage, which has the advantages of high isolation, high stability and low ripple.

[0056] The CPU module is connected to the switch module and the backplane module. For the structure diagram of the CPU module, see image 3 , the CPU module contain...

Embodiment 2

[0084] The structural composition of the Ethernet switch of Embodiment 1 is basically the same, and the difference is that: see Figure 9 , the Ethernet switch of embodiment 2 comprises 2 Ethernet transceiver modules, and each Ethernet transceiver module is equipped with an Ethernet transceiver, and the 2 Ethernet transceivers provide a total of 2 8-way media independent interfaces and Two 8-way Ethernet interfaces, that is, the Ethernet switch can provide 16-way media-independent interfaces and 16-way Ethernet interfaces.

Embodiment 3

[0086] The structural composition of the Ethernet switch of Embodiment 2 is basically the same, that is, the power supply module, CPU module, switching module, Ethernet transceiver module structure, front backplane module and backplane module and composition are as in Embodiment 2, and the difference is that :

[0087] see Figure 10 , the Ethernet switch in Embodiment 3 is provided with a bypass module in addition to two Ethernet transceiver modules, that is, the Ethernet switch can provide 24 media-independent interfaces and 24 Ethernet interfaces externally. For the structure diagram of the bypass module, see Figure 6 , the bypass module includes the bypass module Ethernet transceiver, which provides 8 media-independent interfaces, 4 bypass interfaces and 4 Ethernet interfaces;

[0088] The Ethernet transceiver of the bypass module performs two-way communication with the high-density port switching chip through 8 media-independent interfaces;

[0089] The Ethernet trans...

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Abstract

The invention relates to a switch device, in particular to a vehicle-mounted Ethernet switch and a signal transceiving and train reconnecting method for railway vehicles. The Ethernet switch comprises a power source module, a CPU (central processing unit) module, a switch module, an Ethernet transceiver module, a front back plate module and a rear back plate module. The Ethernet switch can be flexibly expanded and configured according to actual application and is provided with many interfaces, multi-channel Ethernet interfaces, such as eight channels, 16 channels or 24 channels, can be configured according to needs, production cost of the switch is effectively reduced, and link aggregation, bypass, bi-layer forwarding / tri-layer routing, train data real-time transmission, train-net and vehicle-net data conversion and train reconnection are supported.

Description

technical field [0001] The invention relates to a switch device, in particular to a vehicle-mounted Ethernet switch for rail vehicles that can be used in a train control network and an information network, and a method for signal transceiving and train reconnection. Background technique [0002] With the continuous development of trains in the direction of safety, reliability and intelligence, the bandwidth of the existing rail vehicle control network is small, which cannot meet the large bandwidth requirements of train control and information service transmission. And the traditional EMU control network mainly uses WTB bus and MVB bus, the bandwidth of which is only 1Mbps and 1.5Mbps respectively, and mainly transmits train control (such as traction control, brake control, auxiliary control, door control, etc.) data, while for train status Data, train diagnostic data, train maintenance and other data cannot be transmitted in time due to bandwidth limitations, which greatly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/931
CPCH04L49/10
Inventor 徐燕芬宋晓钟薛树坤郭瑞
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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