CN101145855B - A color dispersion compensation device and its method for optical network - Google Patents
A color dispersion compensation device and its method for optical network Download PDFInfo
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- CN101145855B CN101145855B CN2007101752316A CN200710175231A CN101145855B CN 101145855 B CN101145855 B CN 101145855B CN 2007101752316 A CN2007101752316 A CN 2007101752316A CN 200710175231 A CN200710175231 A CN 200710175231A CN 101145855 B CN101145855 B CN 101145855B
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Abstract
The invention discloses an optical network adjustable dispersion compensation device and a method thereof, applied in an optical receivers-arranged optical communication network system. The device comprises a dispersion compensation unit array which is provided with a plurality of adjustable dispersion compensation units of different dispersion levels for compensating different remained dispersions; a first optical switch, the input terminal thereof is connected with an optical signal, while the output terminal thereof is connected with the input of the adjustable dispersion compensation unit; a second optical switch, the input terminal thereof is connected with the output terminal of the adjustable dispersion compensation unit, while the output terminalis connected with the input of the optical receiver; a control unit used to control the dispersion compensation amount of each adjustable dispersion unit according to the signal information, and control the selective routing of the first and the second switches to select the required adjustable dispersion compensation unit. The invention can meet the delicate dispersion compensation need of 40G and above speed communication system, and ensure the time performance requirement of the optical network protective switching and recovery.
Description
Technical field
The present invention relates to optical communication field, particularly relate to a kind of optical-fiber network color dispersion compensation device and method thereof.
Background technology
Ever-increasing bandwidth demand promotes optical communication to be developed to higher rate, and the 10Gbps rate system of extensive use at present can not satisfy the demand of bandwidth in part communication most developed area, has begun to dispose based on the optical communication system of 40Gbps speed.
40Gbps and above optical communication system have also been brought some intrinsic problems when improving transmission bandwidth.Wherein, the reduction of dispersion tolerance has proposed the demand of the dynamic meticulous compensation of chromatic dispersion.The technology of present realization adjustable dispersion compensating mainly is based on Fiber Bragg Grating FBG, and (Fiber Bragg Grating, FBG) with optical standard tool (Etalon) principle, wherein the FBG technology is occupied an leading position.More than two kinds of technology aspect chromatic dispersion compensation quantity, can meet the demands, but dispersion adjustment speed can't satisfy the requirement of optical network protection turning 50ms all more than the second level, also can greatly influence the time index that optical-fiber network recovers.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of optical-fiber network color dispersion compensation device and method thereof, is used to overcome the problem that the existing intrinsic governing speed of adjustable dispersion device is slow, can't satisfy optical network protection turning and require recovery time.
To achieve these goals, the invention provides a kind of optical-fiber network color dispersion compensation device, be used to comprise the optical communication network system of optical receiver, it is characterized in that this device comprises:
The dispersion compensation unit array comprises the adjustable dispersion compensating unit of a plurality of different dispersion measure grades, is used to compensate different residual dispersions;
First optical switch is used to select the described dispersion compensation unit of needs, and the input of described first optical switch connects the light signal of input, and output connects the input of described adjustable dispersion compensating unit;
Second optical switch is used to select the described adjustable adjustable dispersion compensating unit of needs, and the input of described second optical switch connects the output of described adjustable dispersion compensating unit, and the output of described second optical switch connects the input of described optical receiver; And
Control unit is used for the size according to described each the adjustable dispersion compensating unit chromatic dispersion compensation quantity of signaling message control, and the routing of controlling described first optical switch and described second optical switch is to select required adjustable dispersion compensating unit.
Described optical-fiber network color dispersion compensation device, wherein, described first optical switch is the 1*n optical switch, and described second optical switch is the n*1 optical switch, and wherein n is a natural number, and n is more than or equal to the number of described adjustable dispersion compensating unit.
Described optical-fiber network color dispersion compensation device, wherein, described first optical switch, described second optical switch are connected with described each dispersion compensation unit by optical fiber.
To achieve these goals, the present invention also provides a kind of optical-fiber network adjustable dispersion compensating method, is used to comprise the optical communication network system of optical receiver, it is characterized in that, comprising:
Step 2, obtain described residual dispersion maximum and described residual dispersion minimum value by control unit, and determine the compensation progression and the chromatic dispersion compensation quantity of adjustable dispersion compensating unit according to the dispersion tolerance of described optical receiver, set up the corresponding relation of dispersion compensation unit and residual dispersion scope according to described compensation progression and described chromatic dispersion compensation quantity;
Step 3, described control unit is according to the residual dispersion value in the definite vocational work path of described system, judge the residual dispersion scope under this residual dispersion value, and control first optical switch and second optical switch selects corresponding adjustable dispersion compensating unit to finish the foundation in vocational work path; And
Step 4, described control unit be according to described protection recovery policy, controls described first optical switch, described second optical switch switches to corresponding adjustable dispersion compensating unit.
Described optical-fiber network adjustable dispersion compensating method, wherein, in the described step 1, described protection recovery policy comprises route protection, looped network protection, network recovery strategy.
Described optical-fiber network adjustable dispersion compensating method, wherein, when described protection recovery policy was route protection, described step 4 was specially:
Described control unit is selected corresponding adjustable dispersion compensating unit according to the residual dispersion value in protection path; and when the protection condition of switching is set up, control described first optical switch, described second optical switch switches to this residual dispersion value and selects corresponding adjustable dispersion compensating unit.
Described optical-fiber network adjustable dispersion compensating method, wherein, when described protection recovery policy was looped network protection, described step 4 was specially:
Obtain the respectively residual dispersion value of the section of striding of looped network by described control unit; and when triggering the establishment of ring switching condition; according to protection switching and the be protected residual dispersion in path of bridging nodes positional information in the turning protocol; and select corresponding adjustable dispersion compensating unit according to this residual dispersion, control described first optical switch, described second optical switch switches to this residual dispersion and selects corresponding adjustable dispersion compensating unit.
Described optical-fiber network adjustable dispersion compensating method, wherein, when described protection recovery policy was the network recovery strategy, described step 4 was specially:
Described system is when definite business recovery path, the residual dispersion value in this business recovery path is passed to described control unit synchronously, select corresponding adjustable dispersion compensating unit by described control unit according to this residual dispersion value, and control described first optical switch, described second optical switch switches to this residual dispersion value and selects corresponding adjustable dispersion compensating unit.
Described optical-fiber network adjustable dispersion compensating method wherein, after the described step 4, further comprises: described control unit determines whether to be back to the step of described step 1 according to the optical-fiber network of monitoring situation of change topological or described protection recovery policy.
The apparatus and method that the present invention proposes have overcome the slow defective of the intrinsic governing speed of existing adjustable dispersion device; can be under the prior art condition; both satisfy the demand of the meticulous dispersion compensation of 40Gbps and above rate communication system, can also guarantee the time performance requirement of optical network protection turning and recovery.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is an optical-fiber network color dispersion compensation device schematic diagram of the present invention;
Fig. 2 is an optical-fiber network adjustable dispersion compensating method flow diagram of the present invention;
Fig. 3 is optical network protection turning of the present invention and recovery process schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is made further more detailed description.
As shown in Figure 1, be optical-fiber network color dispersion compensation device schematic diagram of the present invention, this device 1 is applied to comprise the optical communication network system (optical network management and control system) of optical receiver 40, and this device 1 specifically comprises with the lower part:
Dispersion compensation unit array 10 comprises the adjustable dispersion compensating unit CD of r different dispersion measure grades
1～CD
r11, be used to compensate different residual dispersions, adjustable dispersion compensating unit CD
1～CD
r11 by control unit 30 controls;
1*n optical switch 21 and n*1 optical switch 22 are used to select the dispersion compensation unit of needs; Be dispersion compensation unit array 10 between 1*n optical switch 21 and the n*1 optical switch 22 wherein, the input of 1*n optical switch 21 connects input optical signal, and output connects the input of adjustable dispersion compensating unit 11; The input of n*1 optical switch 22 connects the output of adjustable dispersion compensating unit 11, and output connects the input of optical receiver 40;
Among Fig. 1,1*n optical switch 21 and n*1 optical switch 22 and dispersion compensation unit array 10 couple together by optical fiber by mode among the figure, n 〉=r, and n, r are natural number.
As shown in Figure 2, be optical-fiber network adjustable dispersion compensating method flow diagram of the present invention, in conjunction with Fig. 1, this method may further comprise the steps:
Step 201, optical network management and control system, are determined all possible transmission path, and are obtained the residual dispersion maximum and the minimum value information in all these paths according to service path routing and protection recovery policy according to the source end and the place client information of business;
In this step, all possible transmission path is meant all possible transmission path that comprises active channel and many stand-by channels.
Step 202, control unit 30 obtains residual dispersion maximum and minimum value information from optical network management and control system, and according to the dispersion tolerance of optical receiver 40, determine the compensation progression of adjustable dispersion compensating unit 11 and the chromatic dispersion compensation quantity of each adjustable dispersion compensating unit 11, be handed down to each adjustable dispersion compensating unit 11 then, each adjustable dispersion compensating unit 11 is adjusted to the dispersion measure of appointment, and sets up the corresponding relation of dispersion compensation unit and residual dispersion scope;
Step 203, the residual dispersion value in the vocational work path that control unit 30 is determined according to optical network management and control system, judge the residual dispersion scope under it, control 1*n optical switch 21 then and n*1 optical switch 22 selects corresponding adjustable dispersion compensating unit 11 to finish the foundation in vocational work path;
Step 204, whether control unit 30 monitoring business are normal, and according to optical network management and definite service protection or the recovery policy of control system, take corresponding measure to guarantee the time performance of protecting or recovering:
A1) if adopt route protection, then select corresponding adjustable dispersion compensating unit 11 to await orders according to the residual dispersion value in protection path, in case the protection condition of switching is set up, then control 1*n optical switch 21 and n*1 optical switch 22 and switch and get final product;
A2) if adopt looped network protection, then control unit 30 need obtain the respectively residual dispersion value of the section of striding of looped network in advance, in case triggering the condition of ring switching sets up, then control unit 30 is according to switching and the bridging nodes positional information in the protection turning protocol, calculate the residual dispersion in protection path, select corresponding adjustable dispersion compensating unit 11 in view of the above, and control 1*n optical switch 21 and 22 switchings of n*1 optical switch;
A3) if adopt the network recovery strategy, then optical network management and control system are when definite business recovery path, need pass to control unit 30 to the residual dispersion value in this path synchronously, control unit 30 is selected corresponding adjustable dispersion compensating unit 11 in view of the above, and control 1*n optical switch 21 and 22 switchings of n*1 optical switch.
Step 205, whether control unit 30 monitor optical network topologies or protection, recovery policy change, if these variations cause all possible transmission path residual dispersion maximum and residual dispersion minimum value to change, then need to get back to step 201.
Wherein, the chromatic dispersion compensation quantity of the compensation progression of the described calculating adjustable dispersion compensating of step 202 unit 11 and each unit 11 also comprises following substep:
Step B1, obtain residual dispersion maximum y and residual dispersion minimum value x, dispersion tolerance scope [cd1 with optical receiver 40, cd2], wherein cd1 and cd2 are all greater than 0, residual dispersion difference z=y-x, the dispersion tolerance width cd=cd1+cd2 of optical receiver 40, dispersion tolerance midrange cdm=(cd2-cd1)/2;
Step B2, the chromatic dispersion compensation quantity (CD of each adjustable dispersion compensating unit 11
i) and compensation progression (r) determine in the following manner:
Step B21, i=1, the 1st grade of unit chromatic dispersion compensation quantity CD
1=x-cdx, cdx are that (cd1, cd2) the arbitrary value in the scope can be given tacit consent to and select cdx=cdm according to different paths residual dispersion actual distribution situation and receptivity decision; The compensation progression r=1 of adjustable dispersion compensating unit 11;
Step B22, Δ=y-CD
1If (cd1 cd2), then finishes and withdraws from Δ ∈; Otherwise enter step B23;
Step B23, r=r+1, i=i+1, i level unit chromatic dispersion compensation quantity CD
i=CD
(i-1)+ (i-1) * cd;
Step B24, Δ=y-CD
iIf (cd1 cd2), then finishes and withdraws from Δ ∈; Otherwise get back to step B23.
Wherein, the corresponding relation of the dispersion compensation unit set up of step 202 and residual dispersion scope is as follows:
CD
1——>[x，x+cd2-cdx]；
CD
2——>[x+cd2-cdx，x+cd2-cdx+cd]；
CD
r——>[x+cd2-cdx+(r-1)*cd，y]。
As shown in Figure 3, be optical network protection turning of the present invention and recovery process schematic diagram.Among Fig. 3, this network is made up of A, B, C and four nodes of D, connects and composes service path by bidirectional optical fiber between four nodes, and is professional from A node set out on a journey (service source end), road (professional Su Duan) under the C node, the device that the present invention proposes is installed in professional Su Duan.Optical network management and control system communicate by management information passage and each node, and this management information passage can the common business network, also can be signaling networks independently.
In conjunction with Fig. 3, further describe optical network protection turning and recover flow process, specific as follows:
C1) when knowing that the service source end that needs protection is the A node; professional Su Duan is the C node; optical network management and control system are determined all possible transmission path according to service path routing and protection recovery policy; and obtain the residual dispersion maximum and the minimum value information in all these paths, in the following several ways:
11) adopt 1+1 or 1: 1 route protection, selecting the vocational work path is AC, and the protection path is AB-BC, through comparing residual dispersion maximum y=RCD
AB-BC, residual dispersion minimum value x=RCD
AC, enter C2;
12) adopt looped network protection---the two-fibre two-way multi-section shared protection ring that A, B, C and D constitute, the vocational work path is AB-BC, abort situation is looked and difference, more all possible by analysis protection path, residual dispersion maximum y=RCD in the protection path
AB-BA-AD-DC, residual dispersion minimum value x=RCD
AB-BC, enter C2;
13) adopt the network recovery strategy, the vocational work path is AC, adopts flow equalization and the shortest recovery policy in path, concrete restoration path view network working condition and decide more all possible by analysis restoration path, residual dispersion maximum y=RCD
AB-BD-DC, residual dispersion minimum value x=RCD
AC, enter C2;
C2) determine the compensation progression and the chromatic dispersion compensation quantity of adjustable dispersion compensating unit 11, each unit 11 is adjusted to the dispersion measure of appointment, and sets up the corresponding relation of dispersion compensation unit and residual dispersion scope;
C3) select corresponding adjustable dispersion compensating unit 11 to finish the foundation in vocational work path;
C4) take corresponding measure to guarantee the time performance of protecting or recovering, in the following several ways:
When 41) adopting 1+1 or 1: 1 route protection, vocational work path A C interrupts, and enables protection path A B-BC, and the control optical switch switches to residual dispersion RCD
AB-BCCorresponding adjustable dispersion compensating unit 11, professional normal with interior recovery at 50ms, enter C5;
When 42) adopting the two-fibre two-way multi-section shared protection ring of A, B, C and D formation, interrupt in the BC section of striding in the vocational work path, enables protection path A B-BA-AD-DC, and the control optical switch switches to residual dispersion RCD
AB-BA-AD-DCCorresponding adjustable dispersion compensating unit 11, professional normal with interior recovery at 50ms, enter C5;
When 43) adopting the network recovery strategy, vocational work path A C interrupts, and adopts flow equalization and the shortest recovery policy in path, selects restoration path AB-BC, and the control optical switch switches to residual dispersion RCD
AB-BCCorresponding adjustable dispersion compensating unit 11, the professional recovery in the time that requires normally enters C5;
C5) whether control unit 30 monitor optical network topologies or protection, recovery policy change, if these variations cause the residual dispersion maximum and the minimum value of all possible transmission path to change, then need to get back to C1.
The present invention proposes a kind of satisfied protection and switch adjustable dispersion compensating method and the device thereof that requires with recovery time, be applicable to single channel 40Gbps and above rate optical communication system.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. optical-fiber network color dispersion compensation device is used to comprise the optical communication network system of optical receiver, it is characterized in that this device comprises:
The dispersion compensation unit array comprises the adjustable dispersion compensating unit of a plurality of different dispersion measure grades, is used to compensate different residual dispersions;
First optical switch is used to select the described adjustable dispersion compensating unit of needs, and the input of described first optical switch connects the light signal of input, and output connects the input of described adjustable dispersion compensating unit;
Second optical switch is used to select the described adjustable dispersion compensating unit of needs, and the input of described second optical switch connects the output of described adjustable dispersion compensating unit, and the output of described second optical switch connects the input of described optical receiver; And
Control unit is used for the size according to described each the adjustable dispersion compensating unit chromatic dispersion compensation quantity of signaling message control, and the routing of controlling described first optical switch and described second optical switch is to select required adjustable dispersion compensating unit;
Wherein, described control unit obtains residual dispersion maximum and residual dispersion minimum value, and determine the compensation progression and the chromatic dispersion compensation quantity of adjustable dispersion compensating unit according to the dispersion tolerance of described optical receiver, set up the corresponding relation of dispersion compensation unit and residual dispersion scope according to described compensation progression and described chromatic dispersion compensation quantity, wherein, the residual dispersion maximum of described transmission path and residual dispersion minimum value are source end and the place client information of described system according to business, determine according to service path routing and protection recovery policy; Described control unit is according to the residual dispersion value in the definite vocational work path of described system, judge the residual dispersion scope under this residual dispersion value, and control first optical switch and second optical switch selects corresponding adjustable dispersion compensating unit to finish the foundation in vocational work path; Described control unit is according to described protection recovery policy, controls described first optical switch, described second optical switch switches to corresponding adjustable dispersion compensating unit.
2. optical-fiber network color dispersion compensation device according to claim 1, it is characterized in that described first optical switch is the 1*n optical switch, described second optical switch is the n*1 optical switch, wherein n is a natural number, and n is more than or equal to the number of described adjustable dispersion compensating unit.
3. optical-fiber network color dispersion compensation device according to claim 2 is characterized in that, described first optical switch, described second optical switch are connected with described each dispersion compensation unit by optical fiber.
4. optical-fiber network adjustable dispersion compensating method is used to comprise the optical communication network system of optical receiver, it is characterized in that, comprising:
Step 1 by source end and the place client information of described system according to business, according to service path routing and protection recovery policy, is determined transmission path and is obtained the residual dispersion maximum and the residual dispersion minimum value of described transmission path;
Step 2, obtain described residual dispersion maximum and described residual dispersion minimum value by control unit, and determine the compensation progression and the chromatic dispersion compensation quantity of adjustable dispersion compensating unit according to the dispersion tolerance of described optical receiver, set up the corresponding relation of dispersion compensation unit and residual dispersion scope according to described compensation progression and described chromatic dispersion compensation quantity;
Step 3, described control unit is according to the residual dispersion value in the definite vocational work path of described system, judge the residual dispersion scope under this residual dispersion value, and control first optical switch and second optical switch selects corresponding adjustable dispersion compensating unit to finish the foundation in vocational work path; And
Step 4, described control unit be according to described protection recovery policy, controls described first optical switch, described second optical switch switches to corresponding adjustable dispersion compensating unit.
5. optical-fiber network adjustable dispersion compensating method according to claim 4 is characterized in that, in the described step 1, described protection recovery policy comprises route protection, looped network protection, network recovery strategy.
6. optical-fiber network adjustable dispersion compensating method according to claim 5 is characterized in that, when described protection recovery policy was route protection, described step 4 was specially:
Described control unit is selected corresponding adjustable dispersion compensating unit according to the residual dispersion value in protection path; and when the protection condition of switching is set up, control described first optical switch, described second optical switch switches to this residual dispersion value and selects corresponding adjustable dispersion compensating unit.
7. optical-fiber network adjustable dispersion compensating method according to claim 5 is characterized in that, when described protection recovery policy was looped network protection, described step 4 was specially:
Obtain the respectively residual dispersion value of the section of striding of looped network by described control unit; and when triggering the establishment of ring switching condition; according to protection switching and the be protected residual dispersion in path of bridging nodes positional information in the turning protocol; and select corresponding adjustable dispersion compensating unit according to this residual dispersion, control described first optical switch, described second optical switch switches to this residual dispersion and selects corresponding adjustable dispersion compensating unit.
8. optical-fiber network adjustable dispersion compensating method according to claim 5 is characterized in that, when described protection recovery policy was the network recovery strategy, described step 4 was specially:
Described system is when definite business recovery path, the residual dispersion value in this business recovery path is passed to described control unit synchronously, select corresponding adjustable dispersion compensating unit by described control unit according to this residual dispersion value, and control described first optical switch, described second optical switch switches to this residual dispersion value and selects corresponding adjustable dispersion compensating unit.
9. according to claim 5,6,7 or 8 described optical-fiber network adjustable dispersion compensating methods; it is characterized in that; after the described step 4, further comprise: described control unit determines whether to be back to the step of described step 1 according to the optical-fiber network of monitoring situation of change topological or described protection recovery policy.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107547166A (en) * | 2017-09-21 | 2018-01-05 | 烽火通信科技股份有限公司 | The system and method for 40G wavelength-division transmission equipment OMSP pretection switch |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599797B (en) * | 2008-06-06 | 2012-04-04 | 中兴通讯股份有限公司 | Method and device for triggering automatic dispersion compensation regulation |
| EP2396912B1 (en) * | 2009-02-12 | 2016-01-06 | Xieon Networks S.à r.l. | System and method for administration of dispersion compensation modules |
| CN101895347B (en) * | 2010-07-06 | 2016-03-02 | 中兴通讯股份有限公司 | Dispersion compensation method and system |
| CN112684541B (en) * | 2021-01-19 | 2021-11-19 | 浙江大学 | Cascade type adjustable silicon-based Bragg grating dispersion compensator |
| CN115720123A (en) * | 2021-08-24 | 2023-02-28 | 中兴通讯股份有限公司 | Route switching method, node, routing device and storage medium |
| CN113949455B (en) * | 2021-09-16 | 2023-02-14 | 武汉光迅科技股份有限公司 | Optical communication device and optical communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790072A (en) * | 2004-12-17 | 2006-06-21 | 日立通讯技术株式会社 | Variable dispersion compensation equipment, optical transmission system using it and method of setting dispersion compensation quantity |
| CN1844965A (en) * | 2005-04-06 | 2006-10-11 | 阿尔卡特公司 | Method for optimization of dispersion compensation, transponder and its use in an optical network with path protection |
| CN101034181A (en) * | 2006-03-10 | 2007-09-12 | 中兴通讯股份有限公司 | Regulation method and device for wavelength-division multiplex system residual chromatic dispersion compensation |
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2007
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790072A (en) * | 2004-12-17 | 2006-06-21 | 日立通讯技术株式会社 | Variable dispersion compensation equipment, optical transmission system using it and method of setting dispersion compensation quantity |
| CN1844965A (en) * | 2005-04-06 | 2006-10-11 | 阿尔卡特公司 | Method for optimization of dispersion compensation, transponder and its use in an optical network with path protection |
| CN101034181A (en) * | 2006-03-10 | 2007-09-12 | 中兴通讯股份有限公司 | Regulation method and device for wavelength-division multiplex system residual chromatic dispersion compensation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107547166A (en) * | 2017-09-21 | 2018-01-05 | 烽火通信科技股份有限公司 | The system and method for 40G wavelength-division transmission equipment OMSP pretection switch |
| CN107547166B (en) * | 2017-09-21 | 2018-12-28 | 烽火通信科技股份有限公司 | The system and method for 40G wavelength-division transmission device OMSP pretection switch |
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