CN1536790A - Optical cable line real-time monitoring system and its method - Google Patents
Optical cable line real-time monitoring system and its method Download PDFInfo
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- CN1536790A CN1536790A CNA031162827A CN03116282A CN1536790A CN 1536790 A CN1536790 A CN 1536790A CN A031162827 A CNA031162827 A CN A031162827A CN 03116282 A CN03116282 A CN 03116282A CN 1536790 A CN1536790 A CN 1536790A
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Abstract
The invention refers to a kind of cable real-time testing system and device. The traditional testing method has problem of inaccurate test caused by the transmitting end signal power changes accidentally. The method includes: testing the power intensity of transmitting signal in cable; testing the power intensity of the receiving end signal in cable; comparing the two power intensities of the transmitting end and the receiving end; if the result is bigger than the line consumption of cable, it needs to compare the signal power intensity of transmitting end, if it is normal, carries on OTDR scan to cable. The invention also provides a correspondent cable real-time testing system.
Description
Technical field
The present invention relates to optical communication technique, relate in particular to lightguide cable link real-time monitoring system and monitoring method thereof.
Background technology
At present, most optical cable monitoring systems, its method all adopts to be measured the luminous power of the receiving end of optical transport network, obtains the measuring light power value of receiving end.Then, compare with the primary signal power level value of making a start that is stored in intrasystem this transmission network in advance.If result's (absolute value) relatively then starts OTDR (optical time domain reflectometer) greater than the line loss of this optical fiber, fibre circuit is carried out fault inquiry and location.There is following problem in this traditional monitoring method, promptly the decay when fibre circuit is normal, and variation has taken place suddenly in the signal power of making a start, then the measuring light power value of receiving end also can change, because the comparative standard value is to be stored in intrasystem primary signal power level value in advance, at this moment system can think that problem has appearred in fibre circuit by mistake, can start OTDR fibre circuit is carried out fault inquiry and location, causes the scanning motion of unnecessary OTDR.
Summary of the invention
Therefore, the objective of the invention is to traditional lightguide cable link real-time monitoring system is improved, eliminate may occur in traditional system because the various mistakes that the unexpected variation of the signal power of making a start brings are surveyed and the problems of misoperation.
For achieving the above object, improvement principle of the present invention is, when measuring the luminous power of receiving end, also the luminous power of making a start is measured, two measured values compare then, if result relatively is greater than line loss, this measured value that then will make a start and last time measured value compare, to determine the source of loss, so just can solve the problem of the signal power variations generation of making a start.
Therefore, lightguide cable link real-time monitoring system provided by the invention comprises:
The optical power monitoring unit of making a start links to each other with making a start of lightguide cable link, is used to monitor the signal power strength of making a start;
The communication unit of making a start links to each other with the described optical power monitoring unit of making a start, and is used for the signal power strength that the described optical power monitoring unit monitoring of making a start obtains is outwards sent;
Receiving end optical power monitoring unit links to each other with the receiving end of lightguide cable link, is used to monitor the signal power strength of receiving end;
The receiving end communication unit links to each other with described receiving end optical power monitoring unit, is used for the signal power strength that the monitoring of optical power monitoring unit, described sending and receiving end obtains is outwards sent;
Central management unit, link to each other with described receiving end communication unit with the described communication unit of making a start respectively, be used to receive that the described communication unit of making a start is monitored resulting described originating terminal signal power level and described receiving end communication unit is monitored resulting described receiver signal power level; And this two signal power strength compared, at comparative result during greater than the line loss of optical cable, this measured value of making a start and last time measured value relatively, whether make a start with judgement normal.Normal if make a start, then send the OTDR scan instruction; And
The OTDR unit, link to each other with one of making a start of the receiving end of described lightguide cable link or described lightguide cable link, be used for described lightguide cable link is carried out OTDR scanning, described OTDR unit also links to each other with described central management unit by described one of communication unit or described receiving end communication unit of making a start, and receives the OTDR scan instruction that described central management unit is sent.
The present invention also provides a kind of lightguide cable link method of real-time, and described method comprises the following steps:
The signal power strength of making a start of monitoring lightguide cable link;
The signal power strength of the receiving end of monitoring lightguide cable link;
The described signal power strength of making a start that monitoring is obtained and the signal power strength of described receiving end compare; And
If comparative result is during greater than the line loss of optical cable, to make a start this and last time measured value compare, whether alarm to determine to make a start, if it is normal to make a start, then lightguide cable link is carried out OTDR scanning.
In above-mentioned method, the signal power strength of the receiving end of the lightguide cable link that the signal power strength of making a start of the lightguide cable link that described monitoring obtains and described monitoring obtain all is sent to central management unit by communication unit, and described central management unit compares this two signal power strength.
As mentioned above, in the present invention, the benchmark comparison value is changed into the signal power strength of making a start that real-time monitoring obtains from traditional primary signal power level value that prestores, survey thereby overcome above-mentioned traditional mistake that causes owing to the originating terminal signal chugging.
Describe specific embodiments of the invention in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the block diagram of lightguide cable link real-time monitoring system of the present invention;
Fig. 2 is the flow chart of lightguide cable link method of real-time of the present invention.
Embodiment
See also Fig. 1 earlier, Fig. 1 shows the block diagram of lightguide cable link real-time monitoring system of the present invention.For the application of lightguide cable link real-time monitoring system of the present invention is described, also show the lightguide cable link and the equipment of part correlation among Fig. 1, for example, optical transceiver A and B etc.Should be appreciated that these are not is the part of lightguide cable link real-time monitoring system.
General optical cable transmission network all comprises optical transceiver A and B, and they are couple to respectively on the optical cable 6 by optical coupler 1A and 1B respectively.In the practice, usually, optical transceiver A and B, optical coupler 1A and 1B and optical cable 6 all are two-way operations.That is to say that optical transceiver A can be used as making a start of fiber optic cable communications, send light signal to optical transceiver B, optical transceiver B is as receiving end; Optical transceiver B also can be used as the receiving end of fiber optic cable communications on the other hand, sends light signal to optical transceiver A, and at this moment, optical transceiver B is as receiving end.For ease of explaining the present invention, in the present embodiment, suppose optical transceiver A as making a start, optical transceiver B is as receiving end.
As can be seen from this figure, lightguide cable link real-time monitoring system of the present invention comprises: the optical coupler 1A and the optical power monitoring unit 2A that are positioned at optical transceiver A one side; Be positioned at the optical coupler 1B and the optical power monitoring unit 2B of optical transceiver B one side.Monitoring means 2A and 2B are connected on optical coupler 1A and the 1B.About the inside concrete structure of optical power monitoring unit 2A and 2B can adopt present existing structure and since its non-be inventive point of the present invention, therefore, no longer launch description at this for these CONSTRUCTED SPECIFICATION and operation principle.The effect of optical power monitoring unit 2A of making a start is the monitoring signal power strength that (being optical transceiver A) locate of making a start; The effect of receiving end optical power monitoring unit 2B is the signal power strength that monitoring receiving end (being optical transceiver B) is located.
As shown in Figure 1, the lightguide cable link real-time monitoring system also includes communication unit 4A, 4B and central management unit 5.Communication unit 4A is used for sending the originating terminal signal power level that monitoring means 2A monitoring obtains to central management unit 5, and simultaneously, communication unit 4B sends the receiver signal power level that monitoring means 2B monitoring obtains to central management unit 5.Central management unit 5 compares them after obtaining originating terminal signal power level and receiver signal power level, draws the loss ratio that receiver signal is compared with originating terminal signal.If this loss ratio is than the line loss greater than optical cable 6, the signal power strength that need make a start relatively, if comparative result is normal, then illustrate and have fault in the lightguide cable link, central management unit 6 is sent the OTDR scan instruction, and sending to OTDR unit 3 by communication unit 4A, OTDR unit 3 scans lightguide cable link by wave multiplexer, carries out fault inquiry and positioning filter 1D.OTDR scanning is utilizing in the technology at present, therefore at this its operation principle is not described in detail.In addition, it should be noted that, in the embodiment shown in fig. 1, is the OTDR unit to be placed make a start, but should be appreciated that equally with conventional art, and the OTDR unit also can place receiving end.
Below with reference to Fig. 2 lightguide cable link method of real-time of the present invention is described once.Fig. 2 shows the flow chart of this method.
After flow process begins, at step S1, the signal power strength of making a start of monitoring lightguide cable link; At step S2, monitor the signal power strength of the receiving end of lightguide cable link then; At step S3, the described signal power strength of making a start that monitoring is obtained and the signal power strength of described receiving end compare; If comparative result, illustrates then that circuit is normal smaller or equal to line loss, get back to the next round monitoring; If comparative result is during greater than the line loss of optical cable, the signal power strength that then need make a start is (step S4) relatively, if it is normal to make a start, then lightguide cable link is carried out OTDR scanning (step S5); The results abnormity of comparison if make a start then produces alarm signal and send central management unit, continues to get back to the next round monitoring.
Lightguide cable link real-time monitoring system of the present invention can also be monitored being equipped with fibre except carrying out the on-line monitoring lightguide cable link.
Claims (3)
1, a kind of lightguide cable link real-time monitoring system comprises:
The optical coupler of making a start is made a start with lightguide cable link and is linked to each other, and is used to provide the signal of monitoring means of making a start.
The wave multiplexer of making a start links to each other with the optical coupler of making a start, circuit and OTDR, is used for the wavelength of OTDR and synthesizing of line work wavelength.
The optical power monitoring unit of making a start links to each other with the optical coupler of making a start of lightguide cable link, is used to monitor the signal power strength of making a start;
The communication unit of making a start links to each other with the described optical power monitoring unit of making a start, and is used for the signal power strength that the described optical power monitoring unit monitoring of making a start obtains is outwards sent;
The receiving end optical coupler links to each other with the lightguide cable link receiving end, is used to provide the signal of receiving end monitoring means.
The filter of making a start links to each other with the optical coupler of making a start, circuit, is used for the wavelength of OTDR is separated with the line work wavelength.
Receiving end optical power monitoring unit links to each other with the optical coupler of lightguide cable link receiving end, is used to monitor the signal power strength of receiving end;
The receiving end communication unit links to each other with described receiving end optical power monitoring unit, is used for the signal power strength that the monitoring of optical power monitoring unit, described sending and receiving end obtains is outwards sent;
Central management unit, link to each other with described receiving end communication unit with the described communication unit of making a start respectively, be used to receive the described communication unit of making a start and monitor the described receiver signal power level that resulting described originating terminal signal power level and the monitoring of described receiving end communication unit obtain; And this two signal power strength compared,, also need compare during at comparative result to the signal power strength of making a start greater than the line loss of optical cable, if it is normal to make a start, then send the OTDR instruction; And
The OTDR unit, link to each other with the wave multiplexer of one of making a start of the receiving end of described lightguide cable link or described lightguide cable link, be used for described lightguide cable link is carried out OTDR scanning, described OTDR unit also links to each other with described central management unit by described one of communication unit or described receiving end communication unit of making a start, and receives the OTDR scan instruction that described central management unit is sent.
2, a kind of lightguide cable link method of real-time, described method comprises the following steps:
The signal power strength of making a start of monitoring lightguide cable link;
The signal power strength of the receiving end of monitoring lightguide cable link;
The described signal power strength of making a start that monitoring is obtained and the signal power strength of described receiving end compare; And
If comparative result during greater than the line loss of optical cable, also needs compare the signal power strength of making a start,, then lightguide cable link is carried out OTDR scanning if it is normal to make a start.
3, method as claimed in claim 2, it is characterized in that, the signal power strength of the receiving end of the lightguide cable link that the signal power strength of making a start of the lightguide cable link that described monitoring obtains and described monitoring obtain all is sent to central management unit by communication unit, and described central management unit compares this two signal power strength.
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| CNB031162827A CN100479353C (en) | 2003-04-10 | 2003-04-10 | Optical cable line real-time monitoring system and its method |
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| CNB031162827A CN100479353C (en) | 2003-04-10 | 2003-04-10 | Optical cable line real-time monitoring system and its method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913398B (en) * | 2005-08-12 | 2010-06-23 | 阿尔卡特公司 | Method for monitoring an optical transmission line, corresponding measuring device and optical transmitter |
| CN102281105A (en) * | 2011-08-30 | 2011-12-14 | 大唐移动通信设备有限公司 | Method and device for detecting optical fiber state |
| CN102571194A (en) * | 2010-12-20 | 2012-07-11 | 方正宽带网络服务股份有限公司 | Method for real-timely monitoring optical cable resources, device and system adopting same |
| CN102685465A (en) * | 2012-05-28 | 2012-09-19 | 成都微迪数字系统技术有限公司 | Video optical transmitter and receiver and detecting method for video optical transmitter and receiver |
| CN102843195A (en) * | 2011-06-23 | 2012-12-26 | 深圳新飞通光电子技术有限公司 | Light receiving and transmitting integrated module of OLT (optical line terminal) |
| CN102891720A (en) * | 2012-10-19 | 2013-01-23 | 烽火通信科技股份有限公司 | Method for automatically regulating optical power |
| CN102047092B (en) * | 2008-06-02 | 2013-01-30 | 住友电气工业株式会社 | Beam path monitoring device, and beam path monitoring system |
| CN101860398B (en) * | 2006-02-03 | 2013-02-20 | 株式会社藤仓 | Light beam path monitoring device and light beam path monitoring method |
| CN103281122A (en) * | 2013-04-28 | 2013-09-04 | 国家电网公司 | Online optical cable monitoring device and method for improving alarm accuracy rate |
| CN103634046A (en) * | 2013-06-26 | 2014-03-12 | 南车青岛四方机车车辆股份有限公司 | Rail vehicle optical fiber network diagnosis device, rail vehicle optical fiber network diagnosis method and rail vehicle using the device |
| CN104796192A (en) * | 2014-08-06 | 2015-07-22 | 深圳市亚光通信有限公司 | Intelligent real-time multichannel optical fibre monitoring system and method |
| CN109302293A (en) * | 2018-11-29 | 2019-02-01 | 四川灵通电讯有限公司 | Enemy and we's recognition methods based on physical layer link |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1146154C (en) * | 1999-10-08 | 2004-04-14 | 深圳市华为技术有限公司 | Optical power monitoring system |
| KR100373773B1 (en) * | 2000-04-07 | 2003-02-26 | 주식회사 액팀스 | Method for a long range operating optical fiber fault prevention system |
| CN1138358C (en) * | 2000-07-12 | 2004-02-11 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring system |
-
2003
- 2003-04-10 CN CNB031162827A patent/CN100479353C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913398B (en) * | 2005-08-12 | 2010-06-23 | 阿尔卡特公司 | Method for monitoring an optical transmission line, corresponding measuring device and optical transmitter |
| CN101860398B (en) * | 2006-02-03 | 2013-02-20 | 株式会社藤仓 | Light beam path monitoring device and light beam path monitoring method |
| CN102047092B (en) * | 2008-06-02 | 2013-01-30 | 住友电气工业株式会社 | Beam path monitoring device, and beam path monitoring system |
| CN102571194A (en) * | 2010-12-20 | 2012-07-11 | 方正宽带网络服务股份有限公司 | Method for real-timely monitoring optical cable resources, device and system adopting same |
| CN102843195A (en) * | 2011-06-23 | 2012-12-26 | 深圳新飞通光电子技术有限公司 | Light receiving and transmitting integrated module of OLT (optical line terminal) |
| CN102281105B (en) * | 2011-08-30 | 2014-08-20 | 大唐移动通信设备有限公司 | Method and device for detecting optical fiber state |
| CN102281105A (en) * | 2011-08-30 | 2011-12-14 | 大唐移动通信设备有限公司 | Method and device for detecting optical fiber state |
| CN102685465A (en) * | 2012-05-28 | 2012-09-19 | 成都微迪数字系统技术有限公司 | Video optical transmitter and receiver and detecting method for video optical transmitter and receiver |
| CN102685465B (en) * | 2012-05-28 | 2015-04-29 | 成都微迪数字系统技术有限公司 | Video optical transmitter and receiver and detecting method for video optical transmitter and receiver |
| CN102891720B (en) * | 2012-10-19 | 2015-05-13 | 烽火通信科技股份有限公司 | Method for automatically regulating optical power |
| CN102891720A (en) * | 2012-10-19 | 2013-01-23 | 烽火通信科技股份有限公司 | Method for automatically regulating optical power |
| CN103281122A (en) * | 2013-04-28 | 2013-09-04 | 国家电网公司 | Online optical cable monitoring device and method for improving alarm accuracy rate |
| CN103281122B (en) * | 2013-04-28 | 2015-10-21 | 国家电网公司 | A kind of optical cable on-line monitoring improves the method for alarm accuracy rate |
| CN103634046A (en) * | 2013-06-26 | 2014-03-12 | 南车青岛四方机车车辆股份有限公司 | Rail vehicle optical fiber network diagnosis device, rail vehicle optical fiber network diagnosis method and rail vehicle using the device |
| CN103634046B (en) * | 2013-06-26 | 2016-07-06 | 中车青岛四方机车车辆股份有限公司 | The rail vehicle fiber optic network diagnostic equipment and method and with the rail vehicle of this device |
| CN104796192A (en) * | 2014-08-06 | 2015-07-22 | 深圳市亚光通信有限公司 | Intelligent real-time multichannel optical fibre monitoring system and method |
| CN104796192B (en) * | 2014-08-06 | 2018-01-16 | 深圳市亚光通信有限公司 | A kind of intelligent real-time multichannel optic-fiber monitoring system and method |
| CN109302293A (en) * | 2018-11-29 | 2019-02-01 | 四川灵通电讯有限公司 | Enemy and we's recognition methods based on physical layer link |
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| CN100479353C (en) | 2009-04-15 |
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