CN107579799B - Link wave spectrum method of adjustment and system based on DWDM - Google Patents
Link wave spectrum method of adjustment and system based on DWDM Download PDFInfo
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- CN107579799B CN107579799B CN201710862585.1A CN201710862585A CN107579799B CN 107579799 B CN107579799 B CN 107579799B CN 201710862585 A CN201710862585 A CN 201710862585A CN 107579799 B CN107579799 B CN 107579799B
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Abstract
The invention discloses a kind of link wave spectrum method of adjustment and system based on DWDM, are related to long-distance high speed optical communication transmission technique field.Steps of the method are: dwdm system is set in each site, and DWDW system includes the EDFA for being provided with EVOA；The practical optical power of corresponding EDFA is arranged according to pre-set expectation optical power value in EVOA；When the optical power difference between adjacent EDFA is more than specified threshold, the EDFA that practical optical power is less than desired optical power value is adjusted into the practical optical power of target EDFA according to desired optical power value as target EDFA, the corresponding EVOA of target EDFA.The present invention realizes distributed optical link wave spectrum adjustment, and compensating for Line Attenuation variation bring influences；The optical power for exporting the EDFA of each website keeps theoretical eapectation constant, reduces the influence of the line nonlinearity effect of high speed transmission system, optic communication Transmission system is allowed to be run steadily in the long term.
Description
Technical field
The present invention relates to long-distance high speed optical communication transmission technique fields, and in particular to one kind is based on DWDM (Dense
Wavelength Division Multiplexing, dense wave division multipurpose) link wave spectrum method of adjustment and system.
Background technique
When common carrier carries out Disposition & Operation maintenance to long-distance high speed optical communication Transmission system, it usually needs to various regions
The business of website is adjusted (such as increase and decrease and scheduling business), and adjustment business inevitably results in the number of wavelengths variation of communication system
With the variation of total optical power (the sum of the optical powers of all websites), and then can extreme influence optical transmission signal quality and stability
Property, the factors such as part wavelength can be declined by OSNR (Optical Signal Noise Ratio, optical signal to noise ratio) or sensitivity
It influences, and leads to error code of service or interruption, therefore safeguard that the link optical power stability of optical transmission system is very necessary.
Currently, the method for the link optical power stability of conventional maintenance optical transmission system are as follows: manually to power rise or under
Drop is compensated beyond the gross output of a certain range of each website, and this method needs manually to calculate in website one by one
Power is output and input, and checks the optical power of the final stage receiving end of each website and the OSNR of optical module receiving side, is not only taken
When it is laborious, and cannot achieve real-time monitoring and real-time control.
Later by the technologies such as GFF (gain smoothing filter) or DGE (Dynamic Gain Equalizer), to source sending side
The exacerbation of optical power, the optical power for manually or dynamically improving each wavelength are carried out balanced and adjustment (increasing or decreasing) each website and are connect
The optical power of receiving end.But the above method is all based on and is adjusted to the wavelength power of each optical channel, cannot keep well total
Optical power is constant, and website is adjusted needs one by one.
Summary of the invention
In view of the deficiencies in the prior art, present invention solves the technical problem that are as follows: how in single or multiple websites
Optical power when changing, keep the stabilization of the total optical power of all websites.
To achieve the above objectives, the link wave spectrum method of adjustment provided by the invention based on DWDM, comprising the following steps:
S1: being arranged dwdm system in each site, and DWDW system includes the EDFA for being provided with EVOA, goes to S2；
S2:EVOA is arranged the practical optical power of corresponding EDFA, goes to S3 according to pre-set expectation optical power value；
S3: when the optical power difference between adjacent EDFA is more than specified threshold, practical optical power is less than desired light function
The EDFA of rate value adjusts the reality of target EDFA according to desired optical power value as target EDFA, the corresponding EVOA of target EDFA
Optical power.
Based on the above technical solution, S3 further includes following below scheme: when target EDFA there are 2 or more and is subordinate to
When different websites, the practical optical power of each target EDFA is sequentially adjusted according to the specified sequence of website.
Based on the above technical solution, the specified sequence of the website is that the ID of each website puts in order.
Based on the above technical solution, S3 further includes following below scheme: if there are 2 or more targets in same website
EDFA is sequentially adjusted in the practical optical power of each target EDFA according to the specified sequence of EDFA.
Based on the above technical solution, the ID that the specified sequence of the EDFA is EDFA puts in order.
The link wave spectrum based on DWDM provided by the invention for realizing the above method adjusts system, including server-side and setting
Dwdm system on each website, dwdm system include EMU, OSC and the EDFA for being provided with EVOA；All EMU with clothes
The communication of business end；
Server-side is used for: the expectation optical power value of each EDFA is arranged, the expectation optical power value of each EDFA is sent to
EMU corresponding with EDFA；After the practical optical power for receiving the EDFA of EMU upload, if monitoring the optical power between adjacent EDFA
When difference is more than specified threshold, the EDFA using practical optical power less than desired optical power value is as target EDFA, to target EDFA
Corresponding OSC issues wave spectrum adjustment signal；
EMU is used for: after practical optical power of the control EVOA according to the expectation optical power value adjustment EDFA received, being obtained in real time
The practical optical power of the practical optical power of EDFA adjusted, the EDFA that will acquire is uploaded to server-side；
OSC is used for: the wave spectrum adjustment signal issued according to server-side, and triggering EVOA adjusts mesh according to desired optical power value
Mark the practical optical power of EDFA.
Based on the above technical solution, the server-side issues wave spectrum adjustment signal to the corresponding OSC of target EDFA
When, when target EDFA is there are 2 or more and is under the jurisdiction of different websites, according to the specified sequence of website successively to each target
The corresponding OSC of EDFA issues wave spectrum adjustment signal.
Based on the above technical solution, the specified sequence of the website is that the ID of each website puts in order.
Based on the above technical solution, the OSC triggering EVOA adjusts target EDFA's according to desired optical power value
When practical optical power, if same OSC corresponds to multiple target EDFA, according to the specified sequence of EDFA, EVOA is successively triggered according to the phase
It hopes optical power value, adjusts the practical optical power of target EDFA.
Based on the above technical solution, the ID that the specified sequence of the EDFA is EDFA puts in order.
Compared with the prior art, the advantages of the present invention are as follows:
It is basic herein referring to S1 of the present invention to S3 it is found that the present invention can adjust the practical optical power of EDFA by EVOA
On, if the present invention has found that the optical power difference between adjacent EDFA more than specified threshold, can automatically control EVOA according to expectation
Optical power value adjusts corresponding EDFA.Therefore, the present invention realizes distributed optical link wave spectrum adjustment, compensates for Line Attenuation
Changing bring influences.The optical power for exporting the EDFA of each website of entire optical transmission line keeps theoretical eapectation not
Become, reduce the influence of the line nonlinearity effect of high speed transmission system, guarantee that the route bit error rate is stablized, allows the power of receiving end
It is maintained at sensitivity or more, and then the receiving end of each website is allowed to possess optimal OSNR, optic communication Transmission system is allowed to be grown
Phase stable operation.
Detailed description of the invention
Fig. 1 is the flow chart of the link wave spectrum method of adjustment based on DWDM in the embodiment of the present invention；
The connection schematic diagram that Fig. 2 is EVOA and EDFA in all websites in the embodiment of the present invention；
Fig. 3 is the connection block diagram of the link wave spectrum adjustment system in the embodiment of the present invention based on DWDM.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
It is shown in Figure 1, the link wave spectrum method of adjustment based on DWDM in the embodiment of the present invention, comprising the following steps:
S1: being arranged dwdm system in each site, and DWDW system includes being provided with EVOA's (electric adjustable optical attenuator)
EDFA (Erbium-doped Optical Fiber Amplifie, erbium-doped fiber amplifier), shown in Figure 2, adjacent EVOA
Between join end to end, go to S2.
According to pre-set expectation optical power value the practical optical power of corresponding EDFA is arranged, i.e., by EDFA in S2:EVOA
Practical optical power setting it is identical as desired optical power value, go to S3.
S3: when the optical power difference between adjacent EDFA (is 2dB in the present embodiment, directly gives specified threshold in specified threshold
Value can not only effectively simplify the complexity of wave spectrum adjustment algorithm, and can effectively avoid during the adjustment of link wave spectrum not
Stability) more than when, it is expected practical optical power is less than the EDFA of optical power value, and as target EDFA, (practical optical power is less than the phase
Optical power value is hoped to illustrate that this section of link is decayed), the corresponding EVOA of target EDFA adjusts target according to desired optical power value
The practical optical power of EDFA.
Since all EDFA are connected (being access between i.e. all EDFA), the practical optical power of 1 EDFA is had adjusted
Afterwards, EDFA later can synchronized update.Such as: expectation optical power value is XdB, if the reality of the EDFA in the website that ID is 1,2
Optical power is respectively XdB, X-2dB, and the practical optical power adjustment for the EDFA in website for being at this time 2 by ID is XdB.
S3 specifically includes following below scheme:
When target EDFA is there are 2 or more and is under the jurisdiction of different websites, according to the specified sequence (ID of each website of website
Put in order) it is sequentially adjusted in the practical optical power of each target EDFA；Such as ID be 1 and 2 adjacent sites and ID be 4 and 5
Adjacent sites EDFA between optical power difference more than specified threshold, the EDFA for the website that ID is 2 and 5 is target EDFA,
The EDFA for the website that then first adjustment ID is 2, then the EDFA for the website that ID is 5 is adjusted, its purpose is that:
Defining all Site IDs is 1 to 5, and the practical optical power of the EDFA of website 2 is 0dB, the practical light of the EDFA of website 5
Power is -3dB, at this time first recalls to the EDFA of website 2 for 3dB (i.e. increase 3dB), then can make the reality of the EDFA of website 5
Optical power becomes 0dB (because of synchronized update, website 2 and the EDFA of website 5 can synchronous increase 3dB)；Again by website 5
The practical optical power of EDFA becomes 3dB, successively adjusts the practical optical power of EDFA step by step, and then guarantee the practical light of all EDFA
Power is identical as desired optical power value.
Similarly, if there are 2 or more target EDFA in same website, according to the specified sequence of EDFA, (ID of EDFA is arranged
Sequentially) it is sequentially adjusted in the practical optical power of each target EDFA.
It is shown in Figure 3, realize that the link wave spectrum based on DWDM of the above method adjusts system, packet in the embodiment of the present invention
The dwdm system for including server-side (using network O&M operating system OTNM2000 in the present embodiment) and being set on each website,
Dwdm system includes EMU (network element control veneer), OSC (net element information transmitting veneer) and the EDFA for being provided with EVOA.It is all
EMU is with server-side by ethernet communication, between EMU and OSC, logical between EMU and EDFA and between OSC and EDFA
It crosses between disk and communicates, communication interconnects by backboard and defines the agreement communicated between disk and communicated between disk；Lead between the OSC of each website
It crosses and (is communicated in specific wavelength of light in the present embodiment for the optical fiber after load information in 1510nm).
Server-side is used for:
(1) each to be arranged at " wave spectrum adjustment " interface according to the incident optical power of the operating rate defined of system
The expectation optical power value of each EDFA is sent to EMU corresponding with EDFA by the expectation optical power value of EDFA；
(2) after according to the practical optical power of the EMU EDFA uploaded, in " wave spectrum adjustment " every section of link of interface real-time display
Pad value variation, if monitor optical power difference between adjacent EDFA specified threshold (when in the present embodiment for 2dB) or more, will
Practical optical power is less than the EDFA of desired optical power value as target EDFA, issues wave spectrum adjustment to the corresponding OSC of target EDFA
Signal；When target EDFA is there are 2 or more and is under the jurisdiction of different websites, according to the specified sequence of website, (ID of each website is arranged
Sequentially) wave spectrum adjustment signal successively is issued to the corresponding OSC of each target EDFA.
EMU is used for: after practical optical power of the control EVOA according to the expectation optical power value adjustment EDFA received, being obtained in real time
The practical optical power of the practical optical power of EDFA adjusted, the EDFA that will acquire is uploaded to server-side.
OSC is used for: the wave spectrum adjustment signal issued according to server-side, and triggering EVOA adjusts mesh according to desired optical power value
Mark the practical optical power of EDFA；If same OSC corresponds to 2 or more target EDFA, according to the specified sequence (ID of EDFA of EDFA
Put in order), EVOA is successively triggered according to desired optical power value, adjusts the practical optical power of target EDFA.
It should be understood that system provided in an embodiment of the present invention is when carrying out intermodule communication, only with above-mentioned each function
The division progress of module can according to need and for example, in practical application by above-mentioned function distribution by different function moulds
Block is completed, i.e., the internal structure of system is divided into different functional modules, to complete all or part of function described above
Energy.
Further, the present invention is not limited to the above-described embodiments, for those skilled in the art,
Without departing from the principles of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as the present invention
Protection scope within.The content being not described in detail in this specification belongs to existing skill well known to professional and technical personnel in the field
Art.
Claims (10)
1. a kind of link wave spectrum method of adjustment based on DWDM, which is characterized in that method includes the following steps:
S1: being arranged dwdm system in each site, and DWDW system includes the er-doped light for being provided with electric adjustable optical attenuator EVOA
Fiber amplifier EDFA, goes to S2；
S2:EVOA is arranged the practical optical power of corresponding EDFA, goes to S3 according to pre-set expectation optical power value；
S3: when the optical power difference between adjacent EDFA is more than specified threshold, practical optical power is less than desired optical power value
EDFA as target EDFA, the corresponding EVOA of target EDFA adjusts the practical smooth function of target EDFA according to desired optical power value
Rate.
2. the link wave spectrum method of adjustment based on DWDM as described in claim 1, which is characterized in that S3 further includes to flow down
Journey: when target EDFA is there are 2 or more and is under the jurisdiction of different websites, each target is sequentially adjusted according to the specified sequence of website
The practical optical power of EDFA.
3. the link wave spectrum method of adjustment based on DWDM as claimed in claim 2, it is characterised in that: the specified sequence of the website
ID for each website puts in order.
4. the link wave spectrum method of adjustment based on DWDM as described in claim 1, which is characterized in that S3 further includes to flow down
Journey: if there are 2 or more target EDFA in same website, the reality of each target EDFA is sequentially adjusted according to the specified sequence of EDFA
Border optical power.
5. the link wave spectrum method of adjustment based on DWDM as claimed in claim 4, it is characterised in that: the specified sequence of the EDFA
It puts in order for the ID of EDFA.
6. a kind of link wave spectrum adjustment system based on DWDM for realizing any one of claim 1 to 5 the method, feature exist
In the dwdm system that: the system includes server-side and is set on each website, dwdm system include network element control veneer EMU,
Net element information transmitting veneer OSC and the erbium-doped optical fiber amplifier EDFA for being provided with electric adjustable optical attenuator EVOA；All network elements
Control veneer EMU is communicated with server-side；
Server-side is used for: the expectation optical power value of each EDFA is set, by the expectation optical power value of each EDFA, be sent to
The corresponding EMU of EDFA；After the practical optical power for receiving the EDFA of EMU upload, if monitoring the optical power difference between adjacent EDFA
When more than specified threshold, the EDFA using practical optical power less than desired optical power value is as target EDFA, to EDFA pairs of target
The OSC answered issues wave spectrum adjustment signal；
EMU is used for: after practical optical power of the control EVOA according to the expectation optical power value adjustment EDFA received, obtaining adjustment in real time
The practical optical power of the practical optical power of EDFA afterwards, the EDFA that will acquire is uploaded to server-side；
OSC is used for: the wave spectrum adjustment signal issued according to server-side, and triggering EVOA adjusts target according to desired optical power value
The practical optical power of EDFA.
7. link wave spectrum based on DWDM adjusts system as claimed in claim 6, it is characterised in that: the server-side is to target
When the corresponding OSC of EDFA issues wave spectrum adjustment signal, when target EDFA is there are 2 or more and is under the jurisdiction of different websites, according to
The specified sequence of website successively issues wave spectrum adjustment signal to the corresponding OSC of each target EDFA.
8. the link wave spectrum based on DWDM adjusts system as claimed in claim 7, it is characterised in that: the specified sequence of the website
ID for each website puts in order.
9. the link wave spectrum based on DWDM adjusts system as claimed in claim 6, it is characterised in that: the OSC triggers EVOA
According to desired optical power value, when adjusting the practical optical power of target EDFA, if same OSC corresponds to multiple target EDFA, according to
The specified sequence of EDFA successively triggers EVOA according to desired optical power value, adjusts the practical optical power of target EDFA.
10. the link wave spectrum based on DWDM adjusts system as claimed in claim 9, it is characterised in that: the EDFA specifies suitable
Sequence is that the ID of EDFA puts in order.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710862585.1A CN107579799B (en) | 2017-09-22 | 2017-09-22 | Link wave spectrum method of adjustment and system based on DWDM |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710862585.1A CN107579799B (en) | 2017-09-22 | 2017-09-22 | Link wave spectrum method of adjustment and system based on DWDM |
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| CN107579799A CN107579799A (en) | 2018-01-12 |
| CN107579799B true CN107579799B (en) | 2019-01-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112217561B (en) * | 2019-07-11 | 2022-06-03 | 烽火通信科技股份有限公司 | C + L waveband optical power automatic equalization method and system |
| CN112397996B (en) * | 2019-08-16 | 2022-04-15 | 中国移动通信有限公司研究院 | Wavelength adjusting method and device and optical module |
| CN114826397B (en) * | 2022-06-29 | 2022-10-18 | 阿里巴巴（中国）有限公司 | Configuration method and device of optical transmission equipment and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1633057A (en) * | 2004-12-29 | 2005-06-29 | 烽火通信科技股份有限公司 | A WDM optical transmission system with automatic link gain adjustment and method thereof |
| US7236700B1 (en) * | 2002-10-11 | 2007-06-26 | Finisar Corporation | Scalable and exchangeable erbium doped fiber amplifier for DWDM |
| CN101656589A (en) * | 2008-08-21 | 2010-02-24 | 华为技术有限公司 | Method and device for optimizing DWDM network channel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7081987B2 (en) * | 2002-05-29 | 2006-07-25 | Pts Corporation | Coordinated control of dynamic gain equalization in a wavelength division multiplexed optical system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7236700B1 (en) * | 2002-10-11 | 2007-06-26 | Finisar Corporation | Scalable and exchangeable erbium doped fiber amplifier for DWDM |
| CN1633057A (en) * | 2004-12-29 | 2005-06-29 | 烽火通信科技股份有限公司 | A WDM optical transmission system with automatic link gain adjustment and method thereof |
| CN101656589A (en) * | 2008-08-21 | 2010-02-24 | 华为技术有限公司 | Method and device for optimizing DWDM network channel |
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