CN1260908C - Wave divided multiplexing line dural fibre optical multiplexing section protecting apparatus - Google Patents
Wave divided multiplexing line dural fibre optical multiplexing section protecting apparatus Download PDFInfo
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- CN1260908C CN1260908C CNB031369324A CN03136932A CN1260908C CN 1260908 C CN1260908 C CN 1260908C CN B031369324 A CNB031369324 A CN B031369324A CN 03136932 A CN03136932 A CN 03136932A CN 1260908 C CN1260908 C CN 1260908C
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Abstract
The present invention discloses a wave division multiplexing line double-fiber optical multiplexing section protective device which comprises a pair of optical sending and receiving ports, a pair of working optical fiber ports, an optical splitter, an optical coupler and an optical monitoring unit. Optical signals of different input ports are selected according to the output of the optical monitoring unit to carry out outputted optical switching. An optical switching input port is connected with an optical receiving working signal and an optical receiving protective signal in the device. An output port is connected with the optical receiving port of the device. A pair of optical interface units which are connected with working optical fibers cause an optical sending working signal, an optical receiving protective signal, the optical receiving working signal and an optical sending protective signal to be transmitted in the same optical fiber. The optical interface units can be optical circulators, optical interweaving devices or wave band separators. A necessary optical fiber transmission protective channel of an optical fiber redundant mode is omitted in the device, and the realization mode of the device is simple and reliable.
Description
(1) technical field
The present invention relates to optical multiplexing section protection (OMSP) device in a kind of wavelength-division multiplex system, refer more particularly to a kind of two fiber optical multiplexing section protective devices that are used for wavelength-division multiplex system.
(2) background technology
Along with the development of technology and the sharp increase of message capacity demand, wavelength division multiplexing (WDM) transmission technology has become the important and solution that generally adopt from the long-distance backbone network to the metropolitan area network.The traffic carrying capacity of the WDM network carrying is big; for example a 80Gb/s power system capacity has been equivalent to 100 No. ten thousand phones; it is that unit calculates speech channel that the Tb/s level system then rises to ten million the tunnel; therefore the fail safe of WDM network just seems particularly important, and people make great efforts to make up the protection system of variety of way so that be the safe and stable operation of network.
In general, the protection of photosphere can be divided into two kinds: OMSP and Optical Channel Protection, OMSP are mainly used in the protection fiber failure, and Optical Channel Protection can be used for the single channel fault.Comparatively practical at present OMSP system or employing redundant optical fiber are realized, or are adopted the protection turning protocol.And adopting the protection turning protocol, this mode can only be used for loop network system at present.While is owing to the complexity and the nonstandard parasexuality of agreement itself, so the practical application rate of this method is not as good as the redundant optical fiber mode.
The OMSP that adopts the redundant optical fiber mode to realize, as shown in Figure 1, at node A transmitting terminal, the OMSP device utilizes 1 pair of transmission of splitter light signal to carry out beam split; Light after the beam split sends working signal a, light sends guard signal b and sends by work, protection optical fiber respectively; In Node B, OMSP device receiving terminal is controlled optical switch 2 according to optical coupler 4 and light monitoring unit 3 output results its light input end light signal is selected output, thereby be implemented on the optical multiplex layer system is carried out 1+1 protection.Optical coupler 4 links to each other with optical fiber with main in this legend, if main with the fiber-optic signal interruption, light monitoring unit 3 will be controlled optical switch 2 and select standby fiber-optic signal to export Node B to.
Its advantage of redundant optical fiber mode is its simplicity; need not in any agreement and the system the not directly related unit of any fault all need not participation protective and switches; but this protected mode shortcoming is to be that it needs redundant Optical Fiber Transmission protection passage; for two fine bidirectional transmission systems; this protected mode requires that four optical fiber are arranged, and two optical fiber of increase are used to transmit guard signal.
This shortcoming seems particularly evident when this protected mode is used for long-haul transmission system, and this mainly is because the optical fibre installation expense is very expensive in long-haul transmission system; Also very very expensive concerning some in addition by redundant optical fiber protected mode the operator of renting optical fiber.
(3) summary of the invention
The present invention aims to provide a kind of simplicity of existing redundant optical fiber mode, does not need two fiber optical multiplexing section protectors of slack simultaneously again.
For achieving the above object, the present invention adopts following technical scheme:
A kind of wavelength division multiplexing circuit two fiber optical multiplexing section protective devices comprise: a pair of light sends, receiving port; A pair of working optical fibre port; Link to each other with described smooth transmit port, light is sent signal be divided into the optical branching device that light sends working signal and light transmission guard signal; Be used for optical coupler with light-receiving working signal coupling output; The light monitoring unit that links to each other with described optical coupler coupling port; And, the optical switch of exporting according to the light signal of the different input ports of light monitoring unit Instruction Selection, described optical switch one input port links to each other with the optical coupler output port, another input port links to each other with the light-receiving guard signal, and its output links to each other with the light-receiving port; It is characterized in that: described protective device also comprises first, second UFIU UMSC Fiber Interface Unit that links to each other with a pair of working optical fibre port, wherein:
First UFIU UMSC Fiber Interface Unit, the light transmission working signal that optical branching device is exported exports the working optical fibre port to, and the light-receiving guard signal that the working optical fibre port is come is exported to another input port of optical switch simultaneously;
Second UFIU UMSC Fiber Interface Unit, the light transmission guard signal that optical branching device is exported exports the working optical fibre port to, and the light-receiving working signal that the working optical fibre port is come is exported to the optical coupler input port simultaneously.
Above-mentioned a kind of wavelength division multiplexing circuit two fiber optical multiplexing section protective devices, wherein, first, second UFIU UMSC Fiber Interface Unit can be a light circulator.
Above-mentioned a kind of wavelength division multiplexing circuit two fiber optical multiplexing section protective devices, wherein, first, second UFIU UMSC Fiber Interface Unit also can be the light interleaver, light transmission signal and light receiving signal satisfy two groups of wavelength that are interweaved of light interleaver requirement each other.
Above-mentioned a kind of wavelength division multiplexing circuit two fiber optical multiplexing section protective devices, wherein, first, second UFIU UMSC Fiber Interface Unit also can be the wave band separator, light sends signal and is operated in different wave bands with light receiving signal.
Above-mentioned a kind of wavelength division multiplexing circuit two fiber optical multiplexing section protective devices, it can also comprise and is arranged on that light sends or/and the image intensifer before the receiving port sends or/and the optical signal power that receives compensates light.
Owing to be provided with UFIU UMSC Fiber Interface Unit; making light transmission working signal and light-receiving guard signal, light-receiving working signal and light send guard signal can transmit in same optical fiber; saved the necessary Optical Fiber Transmission protection of redundant optical fiber mode passage; and the simple and reliable the present invention of implementation not only can be used for the transmission of point-to-point; the chain-shaped network transmission; and can be used for the looped network transmission system; when being used for loop network system, the capacity of loop network system is doubled owing to removed the path protection mode of its relative 1+1 of equipment of the redundancy backup in the network.
(4) description of drawings
Fig. 1 is traditional redundant optical fiber protected mode;
Fig. 2 is the structural representation of wavelength division multiplexing circuit two fine recovery of the present invention with protective device;
Fig. 3 realizes apparatus of the present invention structure function schematic diagram for adopting light circulator;
Fig. 4 realizes apparatus of the present invention structure function schematic diagram for adopting the light interleaver;
Fig. 5 realizes apparatus of the present invention structure function schematic diagram for adopting the wave band separator;
Fig. 6 is the application of apparatus of the present invention in the point-to-point transmission system;
Fig. 7 is the application of apparatus of the present invention in the WDM loop network system.
(5) embodiment
As shown in Figure 2, light sends signal and imports through apparatus of the present invention light transmit port I1, optical branching device 21 sends signal with light and is divided into light transmission working signal a and light transmission guard signal b, light sends working signal a and is loaded into working optical fibre by UFIU UMSC Fiber Interface Unit 25 and working optical fibre port I3, and the light-receiving guard signal d on the working optical fibre of UFIU UMSC Fiber Interface Unit 25 with working optical fibre port I3 delivers to another input port of optical switch 22 simultaneously; Light sends guard signal b and is loaded into another working optical fibre by UFIU UMSC Fiber Interface Unit 26 and working optical fibre port I2, and the light-receiving working signal c on UFIU UMSC Fiber Interface Unit 26 this another working optical fibre with working optical fibre port I2 delivers to optical coupler 24 input ports simultaneously.These coupler 24 output ports link to each other with optical switch 22 1 input ports, its coupling port output light signal detects through light monitoring unit 23, be used to control optical switch 22 and select its input port work, carry out light signal output, optical switch 22 output ports link to each other with apparatus of the present invention light transmit port I4.Under the normal condition, optical switch 22 will be selected the work of one input end mouth under the control of light monitoring unit 23, output light-receiving working signal c.When the working optical fibre that links to each other with working optical fibre port I2 breaks down; the light-receiving working signal c of UFIU UMSC Fiber Interface Unit 26 outputs interrupts or optical power down; the output of optical coupler 24 coupling port also is zero or optical power down; light monitoring unit 23 will be controlled optical switch 22 and select its another input port work according to this variation, output light-receiving guard signal d.
As shown in Figure 3, UFIU UMSC Fiber Interface Unit in apparatus of the present invention adopts light circulator 25A, 26A, and present embodiment is basic identical with structure function shown in Figure 2, and this circulator is the special light assembly of 3 ports of support.The signal of entry port A is directed to port B; and the signal of entry port B is directed to port C; owing to isolate mutually between port A and the port C; light sends working signal a and not mutual interference mutually of light-receiving guard signal d; therefore; light sends signal can use identical operation wavelength with the light guard signal, and the wavelength on apparatus of the present invention light transmitting and receiving terminal mouth, the working optical fibre is represented as figure.
As shown in Figure 4, the UFIU UMSC Fiber Interface Unit in apparatus of the present invention adopts light interleaver 25B, 26B, and light sends signal and adopts two groups of different wavelength with light receiving signal.At this moment; for UFIU UMSC Fiber Interface Unit 26B; light transmission guard signal b wavelength from optical branching device 21 satisfies two groups of wavelength that are interweaved that the light interleaver requires each other with the light-receiving working signal c wavelength of being imported by working optical fibre port I2, and the wavelength on apparatus of the present invention light transmitting and receiving terminal mouth, the working optical fibre is represented as figure.
As shown in Figure 5, the UFIU UMSC Fiber Interface Unit in apparatus of the present invention adopts wavestrip separator 25C, 26C, and light sends signal and light receiving signal is operated in two groups of wavelength that the wavestrip separator can transmit.At this moment; for UFIU UMSC Fiber Interface Unit 26C; be respectively two groups of wavelength that wavestrip separator 26C can transmit from the light transmission guard signal b wavelength of optical branching device 21 and the light-receiving working signal c wavelength of being imported by the interface of working optical fibre port I2 input, the wavelength on apparatus of the present invention light transmitting and receiving terminal mouth, the working optical fibre is represented as figure.
For the loss of compensated optical signal in transmission course, provide enough light to send or/and light receiving power, can also comprise image intensifer in the contrive equipment, this image intensifer is arranged on the light transmission or/and before the receiving port, be used for light is sent or/and the optical signal power that receives compensates.
Adopt as shown in Figure 6 in the wavelength division multiplexing circuit two point-to-point transmission systems of fine recovery of light circulator assembly as UFIU UMSC Fiber Interface Unit and use with protective device; under the normal condition; the optical multiplexing section signal of the output in the nodes X is input to the light transmission interface I1 of the two fiber optical multiplexing section protectors that are attached thereto, and optical branching device 21 is divided into two parts: light sends working signal a and light sends guard signal b.Light sends working signal a and imports from light circulation device 25A port A, B leaves from port, output to this device working optical fibre interface I3, by Optical Fiber Transmission to the other end node Y of system the two fine recovery of wavelength division multiplexing circuit with protective device working optical fibre interface I2, the I2 mouth links to each other with light circulation device 26A port B, (light in the contrive equipment of nodes X sends working signal and a) leaves from port C this signal, output to node Y through optical coupler 24 and optical switch 22 by light-receiving port I4, finish X → Y transmission that nodes X light sends working signal a; And light sends guard signal b, in recovering with protective device, two fibres of nodes X are connected to light circulation device 26A port A, B leaves from port, output to this device working optical fibre interface I2, by the wavelength division multiplexing circuit two fine recovery protective device working optical fibre interface I3 of Optical Fiber Transmission to the other end node Y of system, the I3 mouth links to each other with light circulation device 26A port B, and this signal (light of nodes X sends guard signal b) leaves from port C, is sent to optical switch 22; Finish X → Y transmission that nodes X light sends guard signal b; In apparatus of the present invention of nodes X, because the buffer action of light circulator A, C mouth, light circulator 26A light sends guard signal b can not output to nodes X by light-receiving port I4 through optical coupler 24 and optical switch 22.When the wavelength division multiplexing circuit two fine recovery of nodes X are broken down with protective device working optical fibre interface I3 interface optical fiber; nodes X → node Y light sends working signal a transmission and interrupts; the wavelength division multiplexing circuit two fine recovery of node Y just do not have received signal with the light monitoring unit 23 in the protective device; optical switch 22 is subjected to its control to switch its input port, and nodes X → node Y light sends guard signal b will transfer to contact Y by optical switch 22.
The optical signal transmission of node Y → nodes X and last similar.
Fig. 7 has provided two application of fiber optical multiplexing section protector in loop network system that propose among the present invention, is construction unit annular shown in Figure 6 cascade on the structure, and working method is identical, is not repeated.
Below embodiment has been described in detail the present invention in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details among the embodiment should not constitute limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (5)
1, a kind of wavelength division multiplexing circuit two fiber optical multiplexing section protective devices comprise: a pair of light sends, receiving port (I1, I4); A pair of working optical fibre port (I2, I3); Link to each other with described smooth transmit port (I1), light is sent signal be divided into the optical branching device (21) that light sends working signal (a) and light transmission guard signal (b); Be used for optical coupler (24) with light-receiving working signal (c) coupling output; The light monitoring unit (23) that links to each other with described optical coupler (24) coupling port; And, the optical switch of exporting according to the light signal of the different input ports of light monitoring unit (23) Instruction Selection (22), described optical switch (22) one input ports link to each other with the optical coupler output port, another input port links to each other with light-receiving guard signal (d), and its output links to each other with light-receiving port (I4); It is characterized in that: described protective device also comprises first, second UFIU UMSC Fiber Interface Unit (25,26) that links to each other with a pair of working optical fibre port, wherein:
First UFIU UMSC Fiber Interface Unit (25), the light transmission working signal (a) that optical branching device (21) is exported exports working optical fibre port (I3) to, and the light-receiving guard signal (d) that working optical fibre port (I3) is come is exported to another input port of optical switch (22) simultaneously;
Second UFIU UMSC Fiber Interface Unit (26), the light transmission guard signal (b) that optical branching device (21) is exported exports working optical fibre port (I2) to, and the light-receiving working signal (c) that working optical fibre port (I2) is come is exported to the optical coupler input port simultaneously.
2, wavelength division multiplexing circuit two fiber optical multiplexing section protective devices as claimed in claim 1 is characterized in that described first, second UFIU UMSC Fiber Interface Unit (25,26) is a light circulator.
3, wavelength division multiplexing circuit two fiber optical multiplexing section protective devices as claimed in claim 1; it is characterized in that described first, second UFIU UMSC Fiber Interface Unit (25,26) is the light interleaver, light transmission signal and light receiving signal satisfy two groups of wavelength that are interweaved of light interleaver requirement each other.
4, wavelength division multiplexing circuit two fiber optical multiplexing section protective devices as claimed in claim 1; it is characterized in that described first, second UFIU UMSC Fiber Interface Unit (25,26) is the wavestrip separator, light sends signal and light receiving signal is operated in two groups of wavelength that the wavestrip separator can transmit.
5, as the described wavelength division multiplexing circuit two fiber optical multiplexing section protective devices of arbitrary claim in the claim 1 to 4; it is characterized in that it also comprises image intensifer; described image intensifer is arranged on the light transmission or/and receiving port (I1, I4) before, sends or/and the optical signal power that receives compensates light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031369324A CN1260908C (en) | 2003-05-22 | 2003-05-22 | Wave divided multiplexing line dural fibre optical multiplexing section protecting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031369324A CN1260908C (en) | 2003-05-22 | 2003-05-22 | Wave divided multiplexing line dural fibre optical multiplexing section protecting apparatus |
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| CN1549488A CN1549488A (en) | 2004-11-24 |
| CN1260908C true CN1260908C (en) | 2006-06-21 |
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| CNB031369324A Expired - Lifetime CN1260908C (en) | 2003-05-22 | 2003-05-22 | Wave divided multiplexing line dural fibre optical multiplexing section protecting apparatus |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388708C (en) | 2005-01-01 | 2008-05-14 | 华为技术有限公司 | Grouped light channel sharing protection method and system |
| CN100454785C (en) * | 2005-12-22 | 2009-01-21 | 华为技术有限公司 | Method and apparatus for sharing protection of grouped light path |
| CN101227207B (en) * | 2008-02-05 | 2011-05-25 | 中兴通讯股份有限公司 | Upward joint system for implementing main backup protection of upward joint port |
| CN101900920B (en) * | 2009-05-25 | 2012-10-10 | 财团法人工业技术研究院 | Optical switch and communication system of optical signal |
| JP2012253600A (en) * | 2011-06-03 | 2012-12-20 | Kddi Corp | Interleave device and radio communication system |
| CN104009941A (en) * | 2014-05-16 | 2014-08-27 | 江苏鼎云信息科技有限公司 | Data center rack internal network structure based on arrayed waveguide grating |
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2003
- 2003-05-22 CN CNB031369324A patent/CN1260908C/en not_active Expired - Lifetime
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Granted publication date: 20060621 |