WLAN and LTE parallel system and use method in vehicle ground communication

A vehicle-to-ground communication and network system technology, which is applied in the system field of parallel WLAN and LTE in vehicle-to-ground communication in rail transit, can solve the problems of no service priority guarantee mechanism, inapplicable integrated bearer, and susceptibility to interference, etc., to achieve high efficiency Multi-service priority guarantee mechanism, high reliability anti-interference ability, and the effect of ensuring normal operation

Inactive Publication Date: 2018-04-13
BEIJING RAIL TRANSIT CONSTR MANAGEMENT
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Problems solved by technology

[0003] However, the WLAN system uses public frequency bands and is susceptible to interference; the stability of bandwidth in high-speed mobile scenarios cannot be guaranteed; it does not have a service priority guarantee mechanism and is not suitable for integrated bearer
Furthermore, since the current CBTC system and the CCTV system are independently networked, the use of the WLAN system by the CBTC system at this time results in a serious waste of frequency resources
[0004] In particular, if the WLAN system fails, the vehicle-to-ground communication cannot be guaranteed, affecting the normal operation of the line

Method used

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  • WLAN and LTE parallel system and use method in vehicle ground communication
  • WLAN and LTE parallel system and use method in vehicle ground communication
  • WLAN and LTE parallel system and use method in vehicle ground communication

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[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented.

[0037] It should be noted that in this article, the words "first", "second", "third", and "fourth" are only used to distinguish the same names, not to imply the relationship between these names or order.

[0038] Currently, various parts of the wired network system of the data communication system are connected to each other through a redundant fiber optic backbone network. Such as figure 1 As shown, a section of the backbone network and corresponding nodes and Ethernet switches constitute a part of the trackside network, which extends along the line and constitutes the wire...

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Abstract

The invention discloses a WLAN and LTE parallel system in vehicle ground communication. The system comprises an on-vehicle device, an LTE-M system which communicates with the on-vehicle device, and aWLAN system which communicates with the on-vehicle device. On a vehicle segment covered by a vehicle-ground network, a 3-layer routing device of the LTE-M system is connected with a 3-layer switch ofthe WLAN system. According to the WLAN and the LTE-M system parallel working scheme provided by the invention, a network system with poor communication quality can switch to another network system; normal vehicle ground communication is realized; and normal operation of a train is realized.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a system and a method for using WLAN and LTE in parallel in vehicle-to-ground communication in rail transit. Background technique [0002] According to the control information of the CBTC system and the communication needs of train status information, the control center (ATS) and trackside equipment need to establish a network connection with the vehicle. Currently, the data communication system in the train operation control system uses a single WLAN system to transmit data and maintain vehicle and ground communication. [0003] However, the WLAN system uses public frequency bands and is susceptible to interference; the stability of bandwidth in high-speed mobile scenarios cannot be guaranteed; it does not have a service priority guarantee mechanism and is not suitable for integrated bearer. Furthermore, since the current CBTC system and the CCTV system are built independe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/30B61L27/00
CPCH04W36/0066H04W36/0083H04W36/30B61L27/40
Inventor 韩志伟张艳兵王颖金华张宝
Owner BEIJING RAIL TRANSIT CONSTR MANAGEMENT
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