CN102130721A - Method for automatically acquiring internal fiber connecting relations of reconfigurable optical add-drop multiplexer node - Google Patents
Method for automatically acquiring internal fiber connecting relations of reconfigurable optical add-drop multiplexer node Download PDFInfo
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Abstract
The invention discloses a method for automatically acquiring the internal fiber connecting relations of a reconfigurable optical add-drop multiplexer (ROADM) node, which relates to the field of optical communications. The method comprises the following steps of: traversing and scanning each optical path inside the ROADM node constructed by a wavelength selective switch (WSS), comparing the parameters of spectrums entering and exiting from each line direction of the ROADM node, judging whether two compared spectrums are homologous spectrums or not, uniquely determining one optical path when the two compared spectrums are homologous spectrums, and saving the fiber connecting relation of the uniquely determined optical path; and acquiring the fiber connecting relations of all optical paths inside the ROADM node and automatically generating an optical fiber connecting relation database inside the ROADM node. By adopting the method, the fiber connecting relations can be automatically acquired and saved into the database, manual entry and correction of the fiber connecting relations are eliminated, manual participation steps are reduced, the accuracy and the reliability of the fiber connecting relations entered into the database are ensured, and the efficiency and the intelligent degree of the system are improved.
Description
Technical field
The present invention relates to optical communication field, particularly relate to a kind of method that the Reconfigurable Optical Add/drop Multiplexer intra-node connects fine relation of obtaining automatically.
Background technology
Tradition SDH (Synchronous Digital Hierarchy, SDH (Synchronous Digital Hierarchy)) can realize professional flexible dispatching though transmit net, and is too little because of dispatching particle eventually, loses ground just gradually.Use WDM (Wavelength Division Multiplexing, wavelength division multiplexing) networking, become the optimal selection that operator solves current enormous bandwidth demand.In the evolution of optical communication now, IP OVER WDM has become main flow trend.And the appearance of ROADM (Reconfigurable Optical Add-Drop Multiplexer, Reconfigurable Optical Add/drop Multiplexer), for WDM network wavelength level service dispatching provides possibility.
Based on WSS (Wavelength Selective Switch, wavelength-selective switches) ROADM has been applied among the existing network of operator, and complete successfully the optical wavelength cross scheduling, but how to realize the flexible configuration of these intersections, finish the wavelength level business and dispatch end to end, become the focus that each side pays close attention to.
Transmit in the net at WDM, when using WSS to set up multidimensional ROADM node, the physics of intra-node connects fibre and becomes quite complicated, and separate between each WSS module, is interconnected by optical fiber between its port.The light cross-over configuration all is by checking the fine relation of company between each port of WSS module, opening or closing corresponding WSS module port respectively, thereby realize the scheduling of optical wavelength each time.
Consider based on technology and cost factor, WSS is not with OCM (Optical Channel Monitor, optical channel monitoring promptly carry out power monitoring to each optical wavelength that enters WSS), the operation of therefore each Wavelength dispatching, upper layer software (applications) can't know all whether operation is successful.But, as long as assurance WSS module company's fibre of port each other concerns accurate, scheduling is correctly finished surely with regard to one, that is to say, the wavelength cross scheduling of ROADM node is to be based upon the correct ROADM intra-node physics of determining to connect fine the relation on the basis.ROADM node with WSS is set up when carrying out the light cross-over configuration, needs the fine relation of company of query node inside, according to connecting the accurately port of operation WSS of fine relation, realizes the optical wavelength cross scheduling.
In sum, guarantee that ROADM intra-node physics connects the accurately most important of fine relation.General at present by manual type, with the even fine input database that concerns of the actual physics of ROADM intra-node, with this foundation of intersecting as dispatcher software configuration light.
But there is following defective in the mode of present this manual entry:
(1) workload is bigger, and efficient is not high, has reduced the intelligent degree of system;
Can (2) make mistakes easily, can't guarantee its accuracy, make Wavelength dispatching successfully become unpredictable, and it be obstructed only to show as the light crossover wavelength loaded service of establishment after makeing mistakes, fault location is difficulty relatively.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of above-mentioned background technology, a kind of method that the Reconfigurable Optical Add/drop Multiplexer intra-node connects fine relation of obtaining automatically is provided, automatically the company's of obtaining fibre concerns and is saved in the database, save manual entry and check and correction and connect the fine work that concerns, reduce the artificial link that participates in, guarantee fine the relation accurately and reliably of company of input database, improved the intelligent degree of efficient and system.
Automatically the Reconfigurable Optical Add/drop Multiplexer intra-node that obtains provided by the invention connects the fine method that concerns, may further comprise the steps: traverse scanning is with every light path of the Reconfigurable Optical Add/drop Multiplexer ROADM intra-node of wavelength-selective switches WSS establishment, parameter to each line direction spectrum of turnover ROADM node compares, judge whether two spectrum that compared are homology spectrum, unique definite light path when being judged to be homology spectrum, the fine relation of company of preserving described well-determined light path; Obtain the fine relation of company of all light paths of ROADM intra-node, generate the optical fiber connection relation database of ROADM intra-node automatically.
In technique scheme, described definite light path may further comprise the steps: (1) is when determining a light path of ordering through A, spectroscopy unit OPM is by the output light signal monitoring mouthful mon of A point image intensifer OA, the spectrum of scanning OA output, and preservation spectrum parameter; (2) only open the laser of the OA that ROADM intra-node A point links to each other with following words type wavelength-selective switches WSS_D, each OA output spectrum that links to each other with last words type wavelength-selective switches WSS_M of OPM traverse scanning ROADM intra-node obtains spectrum parameter; (3) spectrum parameter of preserving in spectrum parameter that traverse scanning obtains in the comparison step (2) and the step (1) if identical, is then preserved when the WSS_D port of front opening and the corresponding relation between the WSS_M port, determines a light path.
In technique scheme, each OA output spectrum that links to each other with WSS_M of OPM traverse scanning described in the step (2) may further comprise the steps: talk about port down for one that only opens A point WSS_D, close whole words ports of going up of all WSS_M of ROADM intra-node, go up the words port, the mon mouth spectrum of the OA that OPM scanning links to each other with this WSS_M for one that only opens a WSS_M then at every turn; OPM carries out traverse scanning according to above-mentioned steps at the ROADM intra-node.
In technique scheme, comprise also after the fine relation of the company of described all light paths of the ROADM of obtaining intra-node that step: CPU preserves the whole fibre relation that connects, and report webmaster, generate the optical fiber connection relation database of ROADM intra-node by webmaster.
In technique scheme, the parameter of described spectrum comprises the wavelength number and the wavelength value of spectrum.
In actual applications, optical fiber between each WSS module port of ROADM intra-node can connect arbitrarily, but, ROADM node with the WSS establishment, full wave light intersection that every company's fibre of its inside is in fact corresponding, based on these characteristics, the mode that the present invention adopts every light of traversal ROADM intra-node to intersect, compare by spectrum each line direction of turnover ROADM node, obtain the fine relation of company that every light intersects, generate ROADM intra-node optical fiber connection relation database automatically.
Compared with prior art, advantage of the present invention is as follows:
(1) the present invention can obtain the fine relation of company of ROADM intra-node automatically, and be saved in the database, save manual entry and check and correction and connect the fine work that concerns, reduce the artificial link that participates in, fine database of the company that avoids human factor to cause and physics connect fine inconsistent, guarantee fine the relation accurately and reliably of company of input database;
(2) save the work that manual entry connects fine relation, improved the intelligent degree of efficient and system;
(3) in actual applications, especially in the engineering opening process,, obviously accelerated the progress of opening of ROADM node engineering owing to saved the work that artificial check and correction connects fine configuration.
Description of drawings
Fig. 1 is the optical fiber connection diagram of ROADM intra-node in the embodiment of the invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
In the embodiment of the invention, the concrete optical fiber connection relation of ROADM intra-node is referring to shown in Figure 1, OA (Optical Amplifier, image intensifer) input optical power of finishing ROADM node dimension amplifies, and mon is image intensifer output light signal monitoring mouthful, and WSS_D is words type wavelength-selective switches down, D1, D2 and D3 are words port under the wavelength-selective switches, WSS_M is last words type wavelength-selective switches, and A1, A2 and A3 talk about port on the wavelength-selective switches, and OPM is a spectroscopy unit.
Among Fig. 1, the solid wire of band arrow is all represented optical fiber, and arrow is represented the trend of light signal, and the tubular wire that links to each other with CPU is represented control signal wire.Connect by optical fiber between the An (n=1,2,3) of the Dn of WSS_D (n=1,2,3) port and WSS_M.Be not difficult to find out that the optical fiber connection among Fig. 1 is quite complicated, this also just 4 ties up the ROADM nodes, if 10 dimensions or 20 are tieed up, its inner optical-fiber connection amount will become multiple to increase.3 port WSS can constitute 4 dimension ROADM nodes, and 9 port WSS can constitute 10 dimension ROADM nodes, and then the company's fibre between the WSS_D/WSS_M will reach 90.These being connected fine relation preserve into a database, is to realize the light intersection essential condition of scheduling automatically.In the process that light intersects, connect, could determine certain wavelength by which WSS_D is talked about down, talk about which WSS_M on then by inquiry optical fiber, thus the scheduling of realization wavelength on each dimension direction.If manually connect finely, need write down the head and the tail corresponding relation of these 90 optical fiber, with its typing webmaster one by one, waste time and energy, and reliability can't guarantee then.
The Reconfigurable Optical Add/drop Multiplexer intra-node that obtains automatically that the embodiment of the invention provides connects the fine method that concerns, may further comprise the steps: traverse scanning is with every light path of the Reconfigurable Optical Add/drop Multiplexer ROADM intra-node of wavelength-selective switches WSS establishment, parameter (being the wavelength number and the wavelength value of spectrum) to each line direction spectrum of turnover ROADM node compares, judge whether two spectrum that compared are homology spectrum, unique definite light path when being judged to be homology spectrum, the fine relation of company of preserving described well-determined light path.For the fine relation of the company that obtains the ROADM intra-node, CPU need control OPM and carry out traverse scanning one time, this moment, webmaster was initiated the order of the fine relation of the company of obtaining, equipment is found under CPU control automatically, and the fine relation of the company that obtains all light paths of ROADM intra-node, CPU connects fine relation preservation with whole, and reports webmaster, is generated the optical fiber connection relation database of ROADM intra-node automatically by webmaster.
Above-mentioned definite light path may further comprise the steps:
(1) when determining a light path of ordering through A, spectroscopy unit OPM scans the spectrum of OA output, and preserves spectrum parameter by the output light signal monitoring mouthful mon of A point image intensifer OA.
(2) only open the laser of the OA that ROADM intra-node A point links to each other with following words type wavelength-selective switches WSS_D, each OA output spectrum that links to each other with last words type wavelength-selective switches WSS_M of OPM traverse scanning ROADM intra-node obtains spectrum parameter; During the OPM traverse scanning, talk about port down for one that only opens A point WSS_D, close whole words ports of going up of all WSS_M of ROADM intra-node, each then of only opening a WSS_M goes up and talks about port, the mon mouth spectrum of the OA that OPM scanning links to each other with this WSS_M; OPM carries out traverse scanning according to above-mentioned steps at the ROADM intra-node.
(3) spectrum parameter of preserving in spectrum parameter that traverse scanning obtains in the comparison step (2) and the step (1) if identical, is then preserved when the WSS_D port of front opening and the corresponding relation between the WSS_M port, determines a light path.
Describe method step of the present invention in detail below by a specific embodiment.
For example, the fine relation of the company on determining among Fig. 1 from A to the B path the WSS.
At first, OPM is by the mon mouth of A point OA, the spectrum of scan A point OA output, and spectrum parameter preserved, the spectrum parameter of preservation comprises the occurrence of light wavelength number and wavelength.CPU sends control command, close the laser of all OA that link to each other with WSS_D, only open the laser of the OA that the A point links to each other with WSS_D, can guarantee OPM like this when scanning the output spectrum of the OA that links to each other with WSS_M thereafter, have only an OA output spectrum signal source that links to each other with WSS_D all the time.By comparing the wavelength number and the wavelength value of two spectrum, can determine whether it is homology spectrum, thus unique definite light path.
After treating that above operation is finished, OPM begins the output spectrum of each OA that links to each other with WSS_M of traverse scanning, and the concrete operations step is as follows:
1, opens the D1 port of A point WSS_D, close D2, D3 port, allow the C-band all wavelengths of DWDM (Dense Wavelength Division Multiplexing, dense wave division multipurpose) definition go out by the D1 port;
2, close A1, A2 and the A3 port of all WSS_M of ROADM intranodal, and then open in turn successively, all allow spectrum pass through the unique last words port of a unique WSS_M at every turn, output to the OA that links to each other with this WSS_M then;
3, in the process of above each port of opening each WSS_M in turn, the mon mouth spectrum of the OA that OPM scanning links to each other with this WSS_M;
4, whether the more current spectrum that scans of CPU is identical with the spectrum of preserving before, if identical, then writes down the corresponding relation between the WSS_D of front opening port and WSS_M port.For example, open if find the D2 port of A point WSS_D, the A2 port of B point WSS_M is opened, and the spectrum that is scanned is consistent, then write down A point OA-＞WSS_D (D2)-＞B point WSS_M (A2)-＞B point OA, this has just determined along the optical fiber connection relation of dotted line direction;
5, carry out traverse scanning in the manner described above, can obtain the fine relation of company between all WSS_D and the WSS_M, can realize that optical fiber connects the automatic generation of fine relation, and accurately and reliably;
6, CPU connects fine relation and preserves whole, and reports webmaster, by the webmaster fine relational database of the company of generation automatically.
Connect after the fine relational database generation, when carrying out the light cross scheduling, for example needing wavelength is that the spectrum of 1560.61nm is dispatched to the B point from the A point, webmaster elder generation Query Database, inquire from the A point and be: the A2 port of the D2 port of A point WSS_D and B point WSS_M to the available fiber path of B point, webmaster is initiatively initiated the scheduling name, is that the spectrum of 1560.61nm is opened with the D2 port of A point WSS_D to wavelength, with the A2 port of B point WSS_M is that the spectrum of 1560.61nm is opened to wavelength also, this wave spectrum gets final product these two ports of break-through, realizes the scheduling of wavelength.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
The content that is not described in detail in this specification belongs to this area professional and technical personnel's known prior art.
Claims (5)
1. one kind is obtained the method that the Reconfigurable Optical Add/drop Multiplexer intra-node connects fine relation automatically, it is characterized in that may further comprise the steps: traverse scanning is with every light path of the Reconfigurable Optical Add/drop Multiplexer ROADM intra-node of wavelength-selective switches WSS establishment, parameter to each line direction spectrum of turnover ROADM node compares, judge whether two spectrum that compared are homology spectrum, unique definite light path when being judged to be homology spectrum, the fine relation of company of preserving described well-determined light path; Obtain the fine relation of company of all light paths of ROADM intra-node, generate the optical fiber connection relation database of ROADM intra-node automatically.
2. the Reconfigurable Optical Add/drop Multiplexer intra-node that obtains automatically as claimed in claim 1 connects the fine method that concerns, it is characterized in that: described definite light path may further comprise the steps:
(1) when determining a light path of ordering through A, spectroscopy unit OPM scans the spectrum of OA output, and preserves spectrum parameter by the output light signal monitoring mouthful mon of A point image intensifer OA;
(2) only open the laser of the OA that ROADM intra-node A point links to each other with following words type wavelength-selective switches WSS_D, each OA output spectrum that links to each other with last words type wavelength-selective switches WSS_M of OPM traverse scanning ROADM intra-node obtains spectrum parameter;
(3) spectrum parameter of preserving in spectrum parameter that traverse scanning obtains in the comparison step (2) and the step (1) if identical, is then preserved when the WSS_D port of front opening and the corresponding relation between the WSS_M port, determines a light path.
3. the Reconfigurable Optical Add/drop Multiplexer intra-node that obtains automatically as claimed in claim 2 connects the fine method that concerns, it is characterized in that: each OA output spectrum that links to each other with WSS_M of OPM traverse scanning described in the step (2) may further comprise the steps:
Talk about port down for one that only opens A point WSS_D, close whole words ports of going up of all WSS_M of ROADM intra-node, each then of only opening a WSS_M goes up and talks about port, the mon mouth spectrum of the OA that OPM scanning links to each other with this WSS_M; OPM carries out traverse scanning according to above-mentioned steps at the ROADM intra-node.
4. the Reconfigurable Optical Add/drop Multiplexer intra-node that obtains automatically as claimed in claim 1 connects the fine method that concerns, it is characterized in that: comprise also after the fine relation of the company of described all light paths of the ROADM of obtaining intra-node that step: CPU preserves the whole fibre relation that connects, and report webmaster, generate the optical fiber connection relation database of ROADM intra-node by webmaster.
5. connect the fine method that concerns as the described Reconfigurable Optical Add/drop Multiplexer intra-node that obtains automatically of each claim in the claim 1 to 4, it is characterized in that: the parameter of described spectrum comprises the wavelength number and the wavelength value of spectrum.
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| CN103856258A (en) * | 2012-11-28 | 2014-06-11 | 华为技术有限公司 | Continuous fiber detecting method and device |
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| CN104113429A (en) * | 2013-04-19 | 2014-10-22 | 华为技术有限公司 | Processing method and device for cross equipment middle port connection relations |
| CN105812051A (en) * | 2014-12-31 | 2016-07-27 | 中国电信股份有限公司 | ROADM internal optical fiber connection detection method, detection system, and ROADM |
| CN106788699A (en) * | 2015-11-24 | 2017-05-31 | 中国电信股份有限公司 | The detecting system and method and ROADM equipment of optical fiber connection status |
| US10536236B2 (en) | 2013-08-26 | 2020-01-14 | Coriant Operations, Inc. | Intranodal ROADM fiber management apparatuses, systems, and methods |
| CN111989878A (en) * | 2018-07-18 | 2020-11-24 | 谷歌有限责任公司 | Connectivity verification testing and topology discovery |
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| CN103856258B (en) * | 2012-11-28 | 2017-02-01 | 华为技术有限公司 | Continuous fiber detecting method and device |
| WO2014089772A1 (en) * | 2012-12-12 | 2014-06-19 | 华为技术有限公司 | Link detection method and device |
| CN104113429A (en) * | 2013-04-19 | 2014-10-22 | 华为技术有限公司 | Processing method and device for cross equipment middle port connection relations |
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| US10536236B2 (en) | 2013-08-26 | 2020-01-14 | Coriant Operations, Inc. | Intranodal ROADM fiber management apparatuses, systems, and methods |
| CN105812051A (en) * | 2014-12-31 | 2016-07-27 | 中国电信股份有限公司 | ROADM internal optical fiber connection detection method, detection system, and ROADM |
| CN106788699A (en) * | 2015-11-24 | 2017-05-31 | 中国电信股份有限公司 | The detecting system and method and ROADM equipment of optical fiber connection status |
| CN111989878A (en) * | 2018-07-18 | 2020-11-24 | 谷歌有限责任公司 | Connectivity verification testing and topology discovery |
| CN111989878B (en) * | 2018-07-18 | 2022-01-07 | 谷歌有限责任公司 | Systems, methods, and media for performing connectivity verification testing and topology discovery |
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