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An intra-system maintenance method based on CBTC service carried by LTE

A business, two-way technology, applied in the field of CBTC, can solve problems such as the inability to trace back and demarcate the LTE system, and the inability to perform problem recovery and real-time online maintenance and testing.

Active Publication Date: 2018-12-14
NANJING METRO CONSTRUCTION CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the CBTC service system based on the LTE system, because it involves multiple transmission nodes such as core routers / core switches, core networks, base stations, and TAU terminals, and the special operation of the subway, it is almost impossible to perform problem recovery during operation. Real-time and real-time online maintenance and measurement, so in practical applications, it is impossible to perform online maintenance and measurement and retrospective delimitation of problems in the LTE system after a fault occurs for the LTE-carrying CBTC system

Method used

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  • An intra-system maintenance method based on CBTC service carried by LTE
  • An intra-system maintenance method based on CBTC service carried by LTE

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Embodiment Construction

[0028] In order to make the purpose, technical means and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0029] In this application, the eCN SGi interface of the LTE private network, the air interface of the eNB, and the TAU set up logging points to statistically record the number of CBTC data packets received, the number of packets sent, the maximum receiving interval between data packets, Information such as the average receiving interval and the number of air interface packet loss. The location of the exception in the system is defined through the exception management log.

[0030] figure 2 It is a schematic flow chart of the in-system maintenance and measurement method based on LTE carrying CBTC service in this application. like figure 1 As shown, the method includes:

[0031] Step 201, in the CBTC service system based on LTE bearer, on the eCN SGi interfa...

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Abstract

The invention discloses an intra-system maintenance method based on CBTC service carried by LTE. The method comprises the following steps: in the system, the CBTC packet information is counted according to a set period on the eCN SGi interface in the LTE core network equipment, the air interface of the eNB equipment and the TAU of the LTE terminal, wherein the CBTC packet information comprises thenumber of received packets, the maximum reception interval or average interval between adjacent packets and / or the number of lost packets on an air interface; when it is determined that the data transmission anomaly occurs in the LTE system, the position where the anomaly occurs in the LTE system is located according to the periodic statistical CBTC packet information. By applying the present application, the problem location in the LTE system can be conveniently performed.

Description

technical field [0001] The present application relates to CBTC technology, and in particular to an in-system maintenance and testing method based on LTE carrying CBTC services. Background technique [0002] LTE wireless communication technology is gradually applied to urban rail transit, such as subway, light rail, etc. Among them, CBTC, an urban rail transit train control signal system carried by LTE, is more and more widely used. The CBTC system is used for vehicle driving judgment and control, while the LTE system is used as a communication channel to transmit CBTC data with high reliability at both ends of the vehicle and the ground. figure 1 The arrows in indicate the data flow process from the ground server to the vehicle system. Specifically, such as figure 1 As shown, in the downlink direction, the ZC server at the orbital site sends the data to the core router of the LTE system, the core router sends the data to the core switch, and then sends the data to the BBU ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/04
CPCH04W24/04
Inventor 李勇毛健张超顾晓峻于海张路昊徐绍君鲜柯王梦茹
Owner NANJING METRO CONSTRUCTION CO LTD
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