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Optical path protecting device and method

An optical path protection and protection channel technology, applied in the field of optical network communication, can solve problems such as false switching of working channel and protection channel, and achieve the effect of suppressing false switching and improving stability

Active Publication Date: 2014-12-17
北京中兴光泰软件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide an optical path protection device and method to overcome the defect in the prior art that the working channel and the protection channel are incorrectly switched when the relative signal quality index is used for switching judgment

Method used

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  • Optical path protecting device and method

Examples

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Effect test

Embodiment 1

[0048] This example is in figure 1 On the basis of the optical path protection device shown, the optical path protection device of the present invention is described in detail by taking the channel signal quality determined by the optical power of the channel signal as an example. In this embodiment, the switching unit adopts an optical switch.

[0049] An optical path protection device in this embodiment such as image 3 As shown, the channel signal quality monitoring unit includes a first fiber coupler, a first photoelectric converter, a second fiber coupler, a second photoelectric converter and an analog / digital conversion module.

[0050] The input end of the first optical fiber coupler is connected to the optical signal of the working channel, one output end is connected to the input end of the first photoelectric converter, and the other output end is connected to an input end of the optical switch; the input end of the second optical fiber coupler One end is connected ...

Embodiment 2

[0057] This example is in figure 1 On the basis of the optical path protection device shown, the optical path protection device of the present invention will be described in detail by taking the channel signal quality determined by the bit error number of the channel signal as an example.

[0058] An optical path protection device in this embodiment such as Figure 5 As shown, the channel signal quality monitoring unit includes: a third optical fiber coupler, a third photoelectric converter, a third bit error detection module, a fourth optical fiber coupler, a fourth photoelectric converter and a fourth bit error detection module.

[0059] The input end of the third optical fiber coupler is connected to the optical signal of the working channel, and the output end is connected to the input end of the third photoelectric converter; One input end of the unit is connected; the third bit error detection module is used to calculate the number of bit errors of the channel signal of...

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Abstract

An optical path protection device is disclosed in the present invention, the device including: a channel signal quality monitoring unit used for monitoring the channel signal quality of a working channel and a protection channel; a switching determination unit used for determining whether to switch between the working channel and the protection channel according to said channel signal quality of the working channel and the protection channel, a first absolute threshold value, a second absolute threshold value and a relative threshold value; a switching unit used for switching between the working channel and protection channel according to the determination result of the switching determination unit. An optical path protection method is also disclosed in the present invention. By said method and system, the erroneous switching between the working channel and the protection channel can be restrained, and the stability of transmission system can be improved.

Description

technical field [0001] The invention relates to the field of optical network communication technology, in particular to an optical path protection device and method. Background technique [0002] At present, in the optical fiber communication system, in order to improve the reliability of the optical transmission system, an optical path protection device is generally used in the optical transmission system. The 1+1 or 1:1 optical fiber protection scheme is usually adopted in the transmission equipment. The optical path protection device generally has a working channel and a protection channel. Under normal working conditions, services are transmitted through the working channel. When the working channel fails, the optical path protection device switches the services to the protection channel to realize automatic service recovery. [0003] The optical path protection device judges whether the optical path is faulty by monitoring the channel signal quality, and the channel si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/07H04B1/74H04B10/032H04B10/079
CPCH04B10/07953H04B10/032
Inventor 刘希琳邹红兵
Owner 北京中兴光泰软件有限责任公司
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