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Cross board master spare circuit inverting method and system

A line switching and crossover unit technology, applied in the field of telecommunications, can solve problems such as the inability to maintain normal business operations, and achieve the effect of data transmission protection

Inactive Publication Date: 2005-02-16
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for switching active and standby lines of a cross-connect board, so as to solve the problem in the prior art that it is impossible to maintain the normal operation of all services when the active and standby cross-connect unit XCUs are partially faulty, and to realize data transmission maximum protection

Method used

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  • Cross board master spare circuit inverting method and system
  • Cross board master spare circuit inverting method and system
  • Cross board master spare circuit inverting method and system

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Embodiment Construction

[0024] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0025] according to Figure 4 , the present invention includes a line unit LU and active and standby cross-connect units XCU A, XCU B, the line unit LU has a selection module, the selection module determines the main cross-connect unit, and the line unit LU also includes a detection module, wherein the detection module a , b respectively detect the signal quality of each channel in the active and standby cross-connect units XCU A and XCU B, and input the relevant detection results to the selection module, and the selection module performs signal channel the strobe.

[0026] There is also an overhead processing module in the line unit LU, and the overhead processing module performs isolation processing on relevant detection signals in the data transmission signal.

[0027] When the line unit LU selects and receives service signals, it not only refers to t...

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Abstract

In data transmission of synchronous digital hierarchy (SDH), line unit not only refers to state of main and standby in crossing unit, but also refers to signal quality in each channel for gating channel to receive service information. The said line unit detects signal quality in each relevant channel of main and standby crossing unit. When signal qualities are identical between channels of main and standby, then channel in main crossing unit is selected in preference. When signal qualities are different between channels of main and standby, channel providing better quality is selected.

Description

technical field [0001] The invention relates to electric communication technology, in particular to a method and system for switching main and standby lines of a cross board. Background technique [0002] The important role of data transmission equipment in the field of communication determines that the synchronous digital system SDH equipment must have very high reliability and stability. In order to improve the working stability of SDH equipment, as the core of SDH equipment—crossover unit XCU generally adopts a dual-board hot backup method. Under normal circumstances, there are two cross-connect units, one active and one standby. The active cross-connect unit cooperates with the normal operation of the entire system, and the standby cross-connect unit is in an "idle" state. Only when the main cross-connect unit fails, the two cross-connect units undergo active-standby switchover, and the original standby cross-connect unit becomes the master, replacing the original main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/74H04L12/24H04Q3/00
Inventor 王继海
Owner HUAWEI TECH CO LTD
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