Rail transit train door redundancy network system based on U-shaped network topology

A network topology, rail transit train technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as redundancy, inability to solve Ethernet networks, etc., to reduce manufacturing costs, save quantity and network lines. cables, improving safety and reliability

Inactive Publication Date: 2018-12-11
NANJING KANGNI ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing technology can not solve the Ethernet network redundancy problem between the door control unit (DCU) and the train control system (TCMS)

Method used

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  • Rail transit train door redundancy network system based on U-shaped network topology
  • Rail transit train door redundancy network system based on U-shaped network topology
  • Rail transit train door redundancy network system based on U-shaped network topology

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] The rail transit train door redundant network system based on the U-shaped network topology of the present invention includes vehicle-level Ethernet network units matching the number of carriages, and each vehicle-level Ethernet network unit includes two main vehicle door control units and a plurality of local vehicle doors control unit (LDCU),

[0029] The two main vehicle door control units and the plurality of local vehicle door control units are all provided with two network ports, and the two network ports of the two main vehicle door control units are equipped with independent MACs, and each local vehicle door control unit has two network ports Configured to share a MAC,

[0030] A network port of the first master door control unit MDCU1 is connected to the first Ethernet switch (or the first network port of the Ethernet switch), multiple local door contr...

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Abstract

The invention discloses a rail transit train door redundancy network system based on U-shaped network topology, includes vehicle-level Ethernet network units with matching number of cars, each vehiclelevel Ethernet network unit includes two main door control units and a plurality of local door control units, realizing the Ethernet network redundancy function of the rail transit train door, so that if a single point of failure occurs on an Ethernet network, no packet loss occurs and the network fail recovery time is 0 ms, effectively improving the safety and reliability of train door network.The invention only occupies two Ethernet network ports of the train Ethernet switch, and the whole vehicle door network adopts the U-shaped network topology structure to connect. Compared with the traditional star network topology, the invention can save the number of the Ethernet switch and the network cable, greatly reduces the vehicle manufacturing cost, and has good application prospect.

Description

technical field [0001] The invention relates to the technical field of rail transit train doors, in particular to a redundant network system for rail transit train doors based on a U-shaped network topology. Background technique [0002] At present, the door communication network of rail transit trains on the market mainly adopts a star topology, and a small amount adopts a chain topology. These two types of communication network topologies do not have redundant functions. Moreover, the IEC (International Electrotechnical Commission) has released a high-availability industrial automation communication network protocol set (IEC 62439-1~7), a total of seven standard documents, defining seven protocols. The protocols are as follows: Media Redundancy Protocol (MRP), Parallel Redundancy Protocol (Parallel Redundancy Protocol, PRP), High-availability Seamless Ring Protocol (High-availabilitySeamless Redundancy, HSR), Cross-network Redundancy Protocol ( Cross-network Redundancy Pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/931H04L12/939B61D19/00
CPCB61D19/00H04L41/0631H04L41/0654H04L41/0803H04L41/12H04L49/201H04L49/557
Inventor 茅飞詹先理许洪强邱海兵周江波
Owner NANJING KANGNI ELECTRONICS TECH
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