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Full optical fiber network two fiber bidirectional loop channel shared protective device

A shared protection, all-optical network technology, applied in the field of optical fiber communication, can solve the problem of not being able to meet the needs of the development and protection of optical synchronous digital transmission network, and achieve the effect of remarkable practical effect, cost saving and simple overall structure.

Inactive Publication Date: 2004-05-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no device and technology for channel sharing protection, so it cannot meet the needs of the development and protection of optical synchronous digital transmission network in optical fiber communication

Method used

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  • Full optical fiber network two fiber bidirectional loop channel shared protective device
  • Full optical fiber network two fiber bidirectional loop channel shared protective device
  • Full optical fiber network two fiber bidirectional loop channel shared protective device

Examples

Experimental program
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Embodiment Construction

[0040] Below in conjunction with accompanying drawing, the all-optical network two-fiber bidirectional ring channel sharing protection device of the present invention is implemented as follows in detail;

[0041] exist Figure 1A In the all-optical network, the two-fiber bidirectional ring channel shares the protection ring during normal operation, consisting of several (such as 8) optical add-drop multiplexing (OADM) nodes (named A to H), and the transmission fiber between the nodes , forming a two-fiber bidirectional ring in an all-optical network.

[0042] Among them, "two fibers" refers to two optical fibers, and the ring formed is called the inner ring and the outer ring for short. For example, the services of the inner ring are transmitted clockwise, and the services of the outer ring are transmitted counterclockwise, and the signal transmission directions of the two are opposite, that is, the "two-way". Both the inner and outer rings have multiple wavelengths for trans...

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Abstract

Optical crossing part X, optical selector S and optical distributor D, or three optical crossing parts constitute one (or two) protective device. Optical selector S is connected to local lower route and input of working channel. Optical distributor D is connected to local upper route and output of working channel. Optical crossing part X is connected to optical selector S, optical distributor D, output of protective channel, and input of protective channel respectively. The invention possesses features: a small quantity of part X, selector S and distributor D realize channels shared protection for two one-way traffics within one node; two same devices realize channels shared protection for two two-way traffics within one node; simple structure, reliable transmision performance, good effect. Thus, it is widely applicable and has notable social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the category of optical fiber communication, in particular to an all-optical network protection device of wavelength division multiplexing technology. Background technique [0002] At present, the protection of optical synchronous digital transmission network (SDH) in optical fiber communication has been perfected, while the protection of all-optical network is developing. [0003] The known channel protection technologies for two-fiber bidirectional rings in optical networks currently only have channel 1+1 protection and channel 1:1 protection, both of which are dedicated protections, that is, only one protection channel can be used to protect services on one working channel. So far, there is no device and technology for channel sharing protection, so it cannot meet the needs of the development and protection of optical synchronous digital transmission network in optical fiber communication. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/032H04J14/02H04Q3/52
Inventor 叶兵
Owner ZTE CORP
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