CN201025711Y - A wave division transmission system for optical cable failure self check - Google Patents
A wave division transmission system for optical cable failure self check Download PDFInfo
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- CN201025711Y CN201025711Y CNU2006200991147U CN200620099114U CN201025711Y CN 201025711 Y CN201025711 Y CN 201025711Y CN U2006200991147 U CNU2006200991147 U CN U2006200991147U CN 200620099114 U CN200620099114 U CN 200620099114U CN 201025711 Y CN201025711 Y CN 201025711Y
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Abstract
The utility model relates to a wave-divided transmission system for fault self examining of an optical cable. The utility model uses self light source of a system which is established on a wave-divided transmission equipment as a condition of judgment for fault points of an optical cable line, obtaining fast and accurate location of the faults of the optical cable line, and meanwhile fault information of the optical cable line is processed, and output of the fault points is realized on network management of the wave-divided transmission system. The utility model is characterized in that a system network element is provided with an optical information extracting unit, and the optical information extracting unit is arranged on an interface of an optical amplifier which is connected to a trunk optical cable, and the other end of the optical information extracting unit is connected to an optical detector, and the other end of the optical detector is connected to SUPVY of the network element in which the optical detector is positioned; and OTs in the network element are separately connected to OT controllers. Compared with traditional equipment, the utility model has the advantages that the utility model uses self light source of an optical transmission equipment system as the light source for fault detection, which directly informs line maintainers to do emergency repair rather than to test in a computer room; and the utility model can record variation of parameters of fiber properties in real time, which outputs the effects such as whole condition of the used optical cable of the whole network in real time.
Description
Technical field
The present invention relates to the optical communication technique field, particularly a kind of wave transmission system.
Background technology
Existing wave transmission system schematic diagram as described in Figure 1, it comprises that optical terminus network element, optical relay network element, Optical Add Drop Multiplexer network element etc. partly form, and the functional module of wherein forming said network element is by wavelength conversion unit dish OT, channel-splitting filter OD, wave multiplexer OM, dispersion compensation module DCM, image intensifer OA, pump light source RP, monitoring unit dish SURVY etc.Its signal transduction process is: signal that user interface is come through wavelength conversion unit dish OT finish wavelength Conversion, code stream is handled and the power adjustment finish through wave multiplexer OM multiplexing, pass through again the dispersion compensation preliminary treatment to image intensifer OA again to the circuit fiber cable run.Amplification and the dispersion compensation finished light signal at optical relay network element or Optical Add Drop Multiplexer network element are delivered to light signal another one optical terminus unit again.The monitor message processing procedure is: insert monitor channel at the optical terminus network element by coded modulation to the light signal low frequency modulations or in and finish the adding of information such as monitoring, public affair with band, in optical relay network element and Optical Add Drop Multiplexer network element by to the demodulation of light signal low frequency or decode and separate public affair signal and pilot signal.
When interruption of optical cables, wave transmission system is judged Cable's Fault relaying paragraph by the OA or the RP input and output luminous power of each network element of monitoring, announcement trunk positions circuit for the dimension personnel and recovers, because existing wave-division device monitoring can only failure judgement relaying paragraph, so need line attendant by line test instrument such as OTDR or lightguide cable link survey meter secondary location, actual effect is poor; Routine test is the routine work of line attendant to lightguide cable link simultaneously, but test owing to need disconnect transmission equipment in test with optical cable fibre core resource, system safety there is certain influence, so generally in order to check optical cable fibre core quality, adopt the mode of the standby fibre core of test, test is interrupted, and the cycle is long, can not real time reaction optical cable fibre core be subjected to the stability of ectocine.The Cable's Fault monitoring means of latest development adopts built-in OTDR mode to start test by the outer light signal of stacked tape on the line by add optical branching device in the line side in addition, also can judge the line fault point, but this needs other one to overlap the separate lines monitoring system.In Fig. 1, as want photometry cable fault point, then will send a mouthful place and it be detected with OTDR equipment at OA light.Among Fig. 1, when transmission system line interruption or loss increase, the monitoring unit dish detects at image intensifer OA mouth input and output optical signal power, monitor that light signal is lost or signal power is low excessively, produce warning information and send to the wavelength-division system Network Management Equipment, the attendant judges that according to warning information line fault produces, but can only judge the circuit switching paragraph, reinform line attendant in the machine room test position fix, arrange personnel that fault paragraph scene is checked simultaneously.
Summary of the invention
Technical problem to be solved by this invention be utilize the system itself be based upon on the wavelength-division transmission equipment with light source as the condition of judgement lightguide cable link fault point, realization lightguide cable link fault is quick and precisely located, no longer rely on OTDR equipment and judge the lightguide cable link fault, by to the line fault information processing, on the wave transmission system webmaster, realize the output of line fault point simultaneously.For this reason, the present invention proposes a kind of wave transmission system of Cable's Fault self check, comprise the image intensifer OA that is connected with backbone optical cable in the described system, OA is connected with monitoring unit dish SURVY in its place network element, SURVY is connected with transmission network management, also comprise wavelength conversion unit dish OT in the wherein said system, comprise light-to-current inversion module and electro-optical conversion module in the OT, it is characterized in that:
Be connected with the optical information extraction unit between backbone optical cable and described OA, the optical information extraction unit other end is connected on the photodetector AIU, and the other end of photodetector AIU is connected with SUPVY in its place network element again; Described OA output detects light, detecting light reflects the back at the circuit breakpoint and will detect light by described optical information extraction unit and send into described AIU and detect, testing result is transported to described SUPVY, and SUPVY passes to described transmission network management by supervisory channel with information with testing result and handles;
Also comprise drive circuit and selector in the described OT, wherein, light-to-current inversion module, electro-optical conversion module and drive circuit all are connected with selector, and the OT in same network element is connected with the OT controller by the selector in it, and the SUPVY in OT controller and its place network element is connected; Selector is selected one tunnel output in the drive circuit under the control of OT controller, this road output driving electro-optical conversion module is sent the detection light with optical relay section line characteristic coupling, the non-detection light of OT controller shielding OT output, and control OT exports and detects light.
The present invention utilizes the optical transmission system light source to make test light source, by adding the optical information extraction unit in light source OA output place, collect Rayleigh scattering and Fresnel reflection signal on the transmission line, send into signal detection system, signal detection system is according to Rayleigh scattering on the circuit and Fresnel reflection signal change conditions.Take place under interruption or the obviously increase situation of loss at lightguide cable link, the optical transmission system circuit interrupts, light is lost, optical channel error code etc. starts the fault detect of optical transmission device optical link.The OT controller shields the non-sensed light signal output of corresponding OT, controls one of them OT output simultaneously and detects light.OT is built-in with drive circuit (as square-wave generator), selector is selected a road in the drive circuit output to drive electrical optical converter under OT control and is sent the light wave that mates with optical relay section line characteristic, start simultaneously fault optical cable hop optical signal detecting, the detection light that detection signal sends in the testing process reflects the back at breakpoint and by signal extraction unit (as optical circulator or optical branching device or optical directional coupler) signal is delivered to photodetector, photodetector sends to the wavelength-division system transmission network management with testing result by supervisory channel, and webmaster is the fault location breakpoint location directly.Compared to existing technology, had plurality of advantages owing to make full use of the flashlight that the light wave subset sends as detection light source and after having increased OT controller, optical information extraction unit and photodetector: 1, the light source that utilizes optical transmission device system itself to be possessed is made the fault detect light source; 2, by webmaster control light source output optical signal pulses width to transmission system self; 3, fault output result is that line interruption takes place at XX kilometer place or loss increases, and directly the announcement trunk attendant rushes to repair and needn't test at machine room; 4, line attendant fault location no longer by searching circuit data and contrastive test result; 5, can write down optical fiber characterisitic parameter change conditions, dynamically output the whole network is being used the optical cable overall condition in real time.
Description of drawings
Fig. 1 is a wave transmission system structural representation of the prior art.
Fig. 2 is a Terminal NE structural representation of the present invention.
Fig. 3 is a trunk network meta structure schematic diagram of the present invention.
Fig. 4 is an Optical Add Drop Multiplexer network element structural representation of the present invention.
Fig. 5 is an OT structure principle chart of the prior art.
Fig. 6 is the structure principle chart of wave transmission system.
Fig. 7 is an OT structure principle chart of the present invention.
Identifier declaration among the figure: 1 first OA, 2 second OA, 3 first DCM, 4 second DCM, 5 backbone optical cables, 6 the 3rd OA, 7 the 4th OA, 8 wave-division devices.
Embodiment
The wave transmission system of a kind of Cable's Fault self check of the present invention for short range network, can only have Terminal NE to constitute, and two Terminal NE are connected to and get final product networking on the backbone optical cable.Can set up the network that comprises the Optical Add Drop Multiplexer network element for long-distance transmissions.Also can set up the network that comprises the relaying network element according to the needs of farther distance, this structure as shown in Figure 6.Pass through optical relay network element B, Optical Add Drop Multiplexer network element C if wavelength is the light wave of λ 1, λ 2 from Terminal NE A, deliver to optical line terminal network element D, its medium wavelength is that the light wave of λ 2 is inserted through undue at Optical Add Drop Multiplexer unit C.Between A and B, B and C during interruption of optical cables, light detects ripple and can send by an OT among optical line terminal network element A or the C, simultaneously another one OT is realized shielding, because lightguide cable link length is different between A and B, B and the C, so it is different to detect the wave impulse width.Interrupt if lightguide cable link takes place between C and D, then light detects ripple and sends from C, and detecting optical wavelength is λ 2, also can send to C from D, detects optical wavelength and one of selects among λ 1, the λ 2.
Constitute by light-to-current inversion module, codec, electro-optical conversion module, drive circuit and selector in the OT of a kind of Terminal NE of system of the present invention, referring to Fig. 7, wherein, light-to-current inversion module, electro-optical conversion module and drive circuit all are connected with selector, after codec was connected in the light-to-current inversion module, the OT in Terminal NE was connected with the OT controller by the selector in it.Drive circuit can be the square-wave generator of many outputs in the OT.Selector can be the door switch circuit of multiselect one.Fig. 5 is the OT structure of a kind of Terminal NE of the prior art, and this structure is connected codec to improve the transmission performance of circuit to signal usually between light-to-current inversion module and electro-optical conversion module.
The Terminal NE structure of system of the present invention is referring to Fig. 2 example.First OA of the image intensifer that is connected on backbone optical cable in the dot-dash wire frame on the wave-division device also is connected with the optical information extraction unit between itself and backbone optical cable, the optical information extraction unit can be optical circulator, optical branching device or optical directional coupler etc.First OA is connected in series with SUPVY, RP, second OA, OD successively, and first OA also is connected respectively with first DCM, OM.The optical information extraction unit is connected with photodetector, and photodetector is connected with SUPVY again.Second OA also is connected with second DCM.OD is connected with each OT respectively with OM.Each OT is connected with the OT controller simultaneously.SUPVY in OT controller and its place network element is connected; Selector is selected one tunnel output of drive circuit to drive the electro-optical conversion module under the control of OT controller and is sent the detection light that mates with optical relay section line characteristic, and the OT controller shields the non-detection light of other OT output, controls one of them OT output and detects light.SURVY is connected with transmission network management.OA output detects light, detects light and reflects the back at the circuit breakpoint and will detect light by the optical information extraction unit and send into photodetector and detect, and testing result is transported to SUPVY, and SUPVY passes to transmission network management processing by supervisory channel with information with testing result.Backbone optical cable one end network element is provided with the light post amplifier and is described image intensifer OA, and backbone optical cable other end network element is provided with light preamplifier, and described light preamplifier can be pump light source.The effect of pump light source RP has been the effect of the preposition amplification of light signal, and the signal from backbone optical cable is carried out amplification with the reading capability of enhancing network element to signal on the backbone optical cable, so RP can be alternative for a lot of optical signal amplifying large equipments, and its function and OA are together.The set light post amplifier OA of aforementioned backbone optical cable one end network element mainly is to play the effect that improves signal sensitivity, is transported on the backbone optical cable amplifying after the signal removal of impurities in the network element.
For the extra long distance networking, system of the present invention generally includes the relaying network element.As shown in Figure 3, be the structure connection diagram of relaying network element.Be connected on the 3rd OA of image intensifer of backbone optical cable, be connected with the optical information extraction unit between itself and backbone optical cable, the optical information extraction unit is connected with photodetector, and photodetector is connected with SUPVY again.Be connected on the 4th OA of image intensifer of the backbone optical cable of the relaying network element other end, be connected with the optical information extraction unit between itself and backbone optical cable, the optical information extraction unit is connected with photodetector, and photodetector is connected with SUPVY again.
Referring to Fig. 4, system of the present invention comprises Optical Add Drop Multiplexer network element embodiment.The OT controller links to each other with the wavelength-division system webmaster, and an other side links to each other with other OT, and the optical information extraction unit is serially connected between on backbone optical cable and the wave-division device 8 and the OA that backbone optical cable is connected, and links to each other with photodetector by other interface.Photodetector links to each other with the optical information extraction unit, also is connected with SUPVY in addition.
The present invention divides at original light wave and adds wavelength Conversion control unit OT controller on the transmission system wavelength conversion unit dish OT, its role is to shield the output of corresponding optical transponder unit, wavelength shifter has been realized conversion and the adjustment of sign indicating number type of wavelength of optical signal, power under the normal condition.When line failure, transmission network management starts line fault and detects, the affected OT output that the shielding of OT controller is corresponding, control one of them OT according to the fault paragraph of webmaster output simultaneously and send the light detecting signal that is complementary with the faulty line paragraph, detect light impulse length and frequency variation has taken place, detect light and after the fault point reflects, light signal is outputed to photodetector through optical circulator or optical branching device, photodetector is delivered to the wavelength-division system webmaster with testing result, and webmaster is notified the attendant with fault message.
Letter abbreviations explanation in specification and the accompanying drawing: OT wavelength conversion unit dish, OD channel-splitting filter, OM close Ripple device, DCM dispersion compensation module, OA image intensifer, RP pump light source, SURVY monitoring unit dish, ODOP tells wavelength module, THRU direct channel, EXPRESS Fast Channel, AIU photodetector.
Claims (6)
1. the wave transmission system of a Cable's Fault self check, comprise the image intensifer OA that is connected with backbone optical cable in the described system, OA is connected with monitoring unit dish SURVY in its place network element, SURVY is connected with transmission network management, also comprise wavelength conversion unit dish OT in the wherein said system, comprise light-to-current inversion module and electro-optical conversion module in the OT, it is characterized in that:
Be connected with the optical information extraction unit between backbone optical cable and described OA, the optical information extraction unit other end is connected on the photodetector AIU, and the other end of photodetector AIU is connected with SUPVY in its place network element again; Described OA output detects light, detecting light reflects the back at the circuit breakpoint and will detect light by described optical information extraction unit and send into described AIU and detect, testing result is transported to described SUPVY, and SUPVY passes to described transmission network management by supervisory channel with information with testing result and handles;
Also comprise drive circuit and selector in the described OT, wherein, light-to-current inversion module, electro-optical conversion module and drive circuit all are connected with selector, and the OT in same network element is connected with the OT controller by the selector in it, and the SUPVY in OT controller and its place network element is connected; Selector is selected one tunnel output in the drive circuit under the control of OT controller, this road output driving electro-optical conversion module is sent the detection light with optical relay section line characteristic coupling, the non-detection light of OT controller shielding OT output, and control OT exports and detects light.
2. the wave transmission system of a kind of Cable's Fault self check according to claim 1 is characterized in that: described optical information extraction unit can be optical circulator or optical branching device or optical directional coupler.
3. the wave transmission system of a kind of Cable's Fault self check according to claim 1 is characterized in that: drive circuit is the square-wave generator of many outputs in the described OT.
4. the wave transmission system of a kind of Cable's Fault self check according to claim 1 is characterized in that: selector is the door switch circuit of multiselect one in the described OT.
5. according to claim 1 or 2 or the wave transmission system of 3 or 4 described a kind of Cable's Fault self checks, it is characterized in that: described system comprises the add drop multiplex network element.
6. according to claim 1 or 2 or the wave transmission system of 3 or 4 described a kind of Cable's Fault self checks, it is characterized in that: described system comprises the relaying network element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200991147U CN201025711Y (en) | 2006-09-21 | 2006-09-21 | A wave division transmission system for optical cable failure self check |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2006200991147U CN201025711Y (en) | 2006-09-21 | 2006-09-21 | A wave division transmission system for optical cable failure self check |
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| CN201025711Y true CN201025711Y (en) | 2008-02-20 |
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| CNU2006200991147U Expired - Fee Related CN201025711Y (en) | 2006-09-21 | 2006-09-21 | A wave division transmission system for optical cable failure self check |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010148960A1 (en) * | 2009-06-23 | 2010-12-29 | 华为海洋网络有限公司 | Method, repeater and submarine cable system for monitoring fiber line status |
| CN103973363A (en) * | 2013-01-30 | 2014-08-06 | 泰科电子海底通信有限责任公司 | System And Method For Fault Identification In Optical Communication Systems |
| CN105680938A (en) * | 2016-03-29 | 2016-06-15 | 中航光电科技股份有限公司 | High-definition video fiber transmission self checking method and device |
| CN106330297A (en) * | 2015-06-18 | 2017-01-11 | 中兴通讯股份有限公司 | Method and device for detecting optical fiber fault point |
-
2006
- 2006-09-21 CN CNU2006200991147U patent/CN201025711Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010148960A1 (en) * | 2009-06-23 | 2010-12-29 | 华为海洋网络有限公司 | Method, repeater and submarine cable system for monitoring fiber line status |
| CN101931471A (en) * | 2009-06-23 | 2010-12-29 | 华为海洋网络有限公司 | Method for monitoring fiber line state, repeater and submarine cable system |
| CN101931471B (en) * | 2009-06-23 | 2013-08-07 | 华为海洋网络有限公司 | Method for monitoring fiber line state, repeater and submarine cable system |
| US8676053B2 (en) | 2009-06-23 | 2014-03-18 | Huawei Marine Networks Co., Ltd. | Method for monitoring fiber line state, repeater, submarine cable system |
| CN103973363A (en) * | 2013-01-30 | 2014-08-06 | 泰科电子海底通信有限责任公司 | System And Method For Fault Identification In Optical Communication Systems |
| CN103973363B (en) * | 2013-01-30 | 2018-04-27 | 泰科电子海底通信有限责任公司 | System and method for the fault identification in optical communication system |
| CN106330297A (en) * | 2015-06-18 | 2017-01-11 | 中兴通讯股份有限公司 | Method and device for detecting optical fiber fault point |
| CN105680938A (en) * | 2016-03-29 | 2016-06-15 | 中航光电科技股份有限公司 | High-definition video fiber transmission self checking method and device |
| CN105680938B (en) * | 2016-03-29 | 2018-04-24 | 中航光电科技股份有限公司 | A kind of HD video optical fiber transmission self checking method and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080220 Termination date: 20100921 |