CN106330297B - Method and device for detecting optical fiber fault point - Google Patents
Method and device for detecting optical fiber fault point Download PDFInfo
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- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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Abstract
The invention discloses a method and a device for detecting optical fiber fault points, which comprises the steps of searching a to-be-processed corresponding relation containing the disconnected user terminal equipment in a database storing the to-be-processed corresponding relation aiming at each obtained disconnected user terminal equipment when an OTDR detects one or more branch fault points; and deleting the branch fault points and the off-line user side equipment in the searched corresponding relation to be processed from the detected branch fault points and the obtained off-line user side equipment. By the technical scheme provided by the invention, the optional range of the corresponding relation to be processed is better narrowed under the condition of not increasing auxiliary test equipment, and the maintenance workload is reduced, so that the complexity of network maintenance is reduced.
Description
Technical Field
The present invention relates to a Passive Optical Network (PON) technology, and more particularly, to a method and an apparatus for detecting a fiber fault point in a PON.
Background
The PON is an Optical Distribution Network (ODN) applied to an access Network, and Optical Distribution Networks (ODNs) are formed between local devices such as an Optical Line Terminal (OLT) and a plurality of customer premise devices such as Optical Network Units (ONUs) through passive Optical cables, Optical splitters/combiners (splitters), and the like.
In the PON, an optical fiber between the OLT and the Splitter is called a trunk optical fiber, which is called a trunk for short; the optical fiber between Splitter and the customer premises equipment is called a branch optical fiber, branch for short. Typically, an OLT comprises one or more trunks, each connected to customer premises equipment through one or more branches by a Splitter. The trunk is connected between the PON interface of the OLT and the optical fiber interface of the Splitter. It is understood that one PON interface connects one or more customer premises devices via a backbone and Splitter.
With the increase of the network scale of the PON, the number of users increases, and the network maintenance becomes more and more complex. At present, an Optical Time Domain Reflectometer (OTDR) may be used to measure a fault point, i.e. a breakpoint, an attenuation fault point, or an abnormal fault point, of an Optical fiber from a PON interface of an OLT to each customer premise equipment thereon, and may also detect which customer premise equipment on one PON interface is interrupted in communication with the OLT through the OLT, where the customer premise equipment interrupted in communication is referred to as a dropped customer premise equipment hereinafter. The fault point detected by the OTDR is located in a trunk or a branch, and for convenience of description, the fault point located in the trunk is generally referred to as a trunk fault point, and the fault point located in the branch is generally referred to as a branch fault point. The fault point is usually represented by the distance between it and the OLT, for example, the fault point 1 is located at 10.1km, which means that the fault point is located at the distance olt10.1km.
Usually, a maintainer needs to determine a one-to-one correspondence between a failure point and a disconnected customer premise equipment, and the one-to-one correspondence is referred to as a failure correspondence hereinafter. For convenience of description, a fault correspondence relationship in which a fault point is not solved, that is, a breakpoint, an attenuated fault point, or an abnormal fault point is not repaired is referred to as a to-be-processed correspondence relationship, and a fault correspondence relationship in which a fault point is solved is referred to as a processed correspondence relationship.
It should be noted that, the OTDR test result and the OLT test result are usually obtained through a network management system. Specifically, after receiving alarm information for indicating which PON interface of the OLT has the disconnected customer premise equipment, the network management system extracts the PON interface indicated by the alarm information and instructs the OTDR to perform a fault point test on the extracted PON interface; after the OTDR completes the fault point test, the OTDR test result is returned to the network management system; after receiving the offline alarm and extracting the PON interface, the network management system also obtains an OLT detection result aiming at the extracted PON interface. If the OTDR test result contains a main fault point, displaying the main fault point; if the OTDR test result contains a branch fault point and the OLT test result contains one or more offline user side equipment, displaying each to-be-processed corresponding relation formed by the branch fault point and each offline user side equipment respectively; if the OTDR test result includes two or more branch fault points, the OLT test result correspondingly includes two or more drop subscriber end devices and displays the branch fault points and the drop subscriber end devices, and obviously, the to-be-processed corresponding relationship between the branch fault points and the drop subscriber end devices cannot be determined under this condition. It is obvious that the number of the dropped customer premises equipment is greater than or equal to the number of the branch fault points, for example, when there are two branch fault points with the same length from the OLT, only one branch fault point is included in the OTDR test result, and the branch fault point represents the two branch fault points.
When two or more branch fault points are detected, maintenance personnel need to determine the correspondence to be processed. When detecting 2 fault points, the selectable range at least includes 4 corresponding relations, at this time, the maintenance staff needs to select 2 of the at least 4 corresponding relations as the corresponding relations to be processed, when detecting 3 fault points, the selectable range at least includes 9 corresponding relations, at this time, the maintenance staff needs to select 3 of the at least 9 corresponding relations to be processed as the corresponding relations to be processed. Obviously, as the number of fault points increases, the selectable range of the correspondence to be processed increases.
At present, in order to determine the correspondence to be processed, auxiliary test equipment needs to be added to the PON, so that the network topology is more complex, the complexity of network maintenance is increased, and the networking cost is also increased.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a method and an apparatus for detecting an optical fiber fault point, which can reduce the selectable range of the correspondence to be processed without adding auxiliary test equipment, and better reduce the complexity of network maintenance.
In order to achieve the purpose of the invention, the invention discloses a method for detecting a fault point of an optical fiber, which comprises the following steps:
when the optical time domain reflector OTDR detects one or more branch fault points, aiming at each obtained offline user end equipment, searching a to-be-processed corresponding relation containing the offline user end equipment in a database which stores the to-be-processed corresponding relation;
and deleting the branch fault points and the off-line user side equipment in the searched corresponding relation to be processed from the detected branch fault points and the obtained off-line user side equipment.
The method is also preceded by: and acquiring each offline user terminal device.
The method further comprises the following steps: and if the updated branch fault points and the updated offline user end equipment comprise one branch fault point and one or more user end equipment, determining the branch fault point and the user end equipment as corresponding relations to be processed respectively, and storing the determined corresponding relations to be processed in the database.
Further, if the correspondence to be processed is determined, the method further includes: and displaying the searched corresponding relation to be processed and the determined corresponding relation to be processed.
Further, if the to-be-processed corresponding relationship is not determined, the method further includes: and displaying the searched corresponding relation to be processed, and the updated branch fault points and the offline user side equipment.
Further, after receiving indication information indicating the processed corresponding relationship, the method further includes: and searching the corresponding relation to be processed which is the same as the received corresponding relation to be processed in the database, and deleting the searched corresponding relation to be processed.
The invention also discloses a device for detecting the fault point of the optical fiber, which comprises a searching unit and a processing unit, wherein,
a searching unit, configured to search, when the OTDR detects one or more branch fault points, for each obtained dropped subscriber premises equipment, a to-be-processed correspondence relationship including the dropped subscriber premises equipment in a database in which the to-be-processed correspondence relationship is stored;
and the processing unit is used for deleting the branch fault points and the off-line user side equipment in the to-be-processed corresponding relation searched by the searching unit from the detected branch fault points and the obtained off-line user side equipment.
The searching unit is further configured to obtain each offline user end device.
The device also comprises a maintenance unit, which is used for determining a branch fault point and each user end equipment as each corresponding relation to be processed when each branch fault point and each user end equipment which is updated by the processing unit comprise a branch fault point and one or more user end equipment, and storing the determined corresponding relation to be processed to the database.
Further, the device further comprises a display unit, configured to display the to-be-processed corresponding relationship found by the finding unit and the to-be-processed corresponding relationship determined by the processing unit when the maintenance unit determines the to-be-processed corresponding relationship.
Further, the display unit is further configured to: and when the maintenance unit does not determine the corresponding relation to be processed, displaying the corresponding relation to be processed searched by the searching unit, and each branch fault point and each offline user end equipment updated by the processing unit.
Further, the maintenance unit is further configured to: receiving indication information for indicating the processed corresponding relation, searching the corresponding relation to be processed which is the same as the received processed corresponding relation in the database, and deleting the searched corresponding relation to be processed in the database.
When the OTDR detects one or more branch fault points, aiming at each obtained drop user terminal equipment, searching a to-be-processed corresponding relation containing the drop user terminal equipment in a database which stores the to-be-processed corresponding relation; and deleting the branch fault points and the off-line user side equipment in the searched corresponding relation to be processed from the detected branch fault points and the obtained off-line user side equipment. By the technical scheme of the invention, under the condition of not increasing auxiliary test equipment, each branch fault point detected by an OTDR test result, each offline user end equipment obtained by an OLT test result and the searched information in the database are combined to obtain each updated branch fault point and each offline user end equipment, so that the optional range of the corresponding relation to be processed is better reduced, and the maintenance workload and the network maintenance complexity are reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flow chart of a method of detecting a point of failure in an optical fiber according to the present invention;
FIG. 2 is a schematic diagram of the structure of the apparatus for detecting a failure point of an optical fiber according to the present invention;
fig. 3(a) is a first schematic diagram of a PON network with a branch fault;
fig. 3(b) is a second schematic diagram of a PON network with a branch fault.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Fig. 1 is a flowchart of a method for detecting a fault point of an optical fiber according to the present invention, as shown in fig. 1, including:
step 101: when the OTDR detects one or more branch fault points, for each of the obtained disconnected customer premise equipment, a to-be-processed correspondence relationship including the disconnected customer premise equipment is searched in a database in which the to-be-processed correspondence relationship is stored.
The specific implementation of step 101 is a routine technical means for those skilled in the art, and is not used to limit the scope of the present invention, and will not be described herein.
Step 102: and deleting the branch fault points and the off-line user side equipment in the searched corresponding relation to be processed from the detected branch fault points and the obtained off-line user side equipment. Through step 102, updated branch fault points and drop-line customer premise equipment are obtained.
It is easy to understand that, if the to-be-processed correspondence is not found in step 101, the branch failure points and the drop-line user end devices before updating are the same as the branch failure points and the drop-line user end devices after updating in step 101. In the found to-be-processed corresponding relationship, there may be two or more to-be-processed corresponding relationships including the same branch failure point, and at this time, the same branch failure point only needs to be deleted once in each branch failure point and each drop-line user end device before updating.
Through step 102, the optional range of the correspondence relationship included between each updated branch failure point and each drop-line customer premise equipment is equal to or smaller than the optional range of the correspondence relationship included between each branch failure point and each drop-line customer premise equipment before updating. That is, because the possibility of simultaneous interruption of the branches is very small, the possibility that the selectable range of the former is smaller than the selectable range of the latter is very high, so that the selectable range of the corresponding relationship is reduced with a high possibility by the method of the present invention, the workload of the maintainer for determining the corresponding relationship to be processed is reduced, and the complexity of the PON network maintenance is reduced.
In order to improve the method, the method also comprises the following steps: and if each updated branch fault point and each updated offline user end device comprise one branch fault point and one or more user end devices, determining the branch fault point and each user end device as each corresponding relation to be processed, and storing the determined corresponding relation to be processed into a database.
Further, the air conditioner is provided with a fan,
if the corresponding relation to be processed is determined, the method further comprises the following steps: and displaying the searched corresponding relation to be processed and the determined corresponding relation to be processed. Under the condition, maintenance personnel can directly obtain the corresponding relation to be processed, and the maintenance efficiency is obviously improved.
Further, the air conditioner is provided with a fan,
if the corresponding relation to be processed is not determined, that is, the updated branch fault points and the offline user end devices include two or more branch fault points, the method further includes: and displaying the searched corresponding relation to be processed, and the updated branch fault points and the offline user side equipment. When the to-be-processed corresponding relation is found, according to the displayed information, the maintainer only needs to determine the to-be-processed corresponding relation from the updated corresponding relation between each branch fault point and each offline user terminal device, so that the workload of the maintainer for determining the to-be-processed corresponding relation is reduced, and the maintenance efficiency is improved better.
In order to make the method of the present invention more perfect, after receiving indication information for indicating the processed corresponding relationship, such as alarm recovery information, the method of the present invention further comprises: and searching the corresponding relation to be processed which is the same as the received corresponding relation to be processed in the database, and deleting the searched corresponding relation to be processed.
It can be seen that the method of the present invention ensures that the pending correspondence is maintained in the database by the above-mentioned steps of adding and deleting the pending correspondence in the data. Therefore, the selectable range of the corresponding relation contained between each branch fault point and each offline user end device before updating is narrowed by combining the OTDR test result, the OLT test result and the information stored in the database.
The process of the invention is illustrated below.
As shown in fig. 3(a), when a branch fault 1 occurs on a branch corresponding to the customer premise equipment 1, the method of the present invention displays a pending correspondence between the branch fault point 1 and the customer premise equipment 1, and stores the pending correspondence in the database. On the basis of the fault point shown in fig. 3(a), as shown in fig. 3(b), a branch fault point 2 corresponding to the customer premise equipment 2 further appears, at this time, an OTDR test result shows the branch fault point 1 and the branch fault point 2, an OLT test result shows that the customer premise equipment 1 and the customer premise equipment 2 are disconnected, the to-be-processed correspondence 1 between the branch fault point 1 and the customer premise equipment 1 is queried through the method step 101 of the present invention, the to-be-processed correspondence 2 between the branch fault point 2 and the customer premise equipment 2 is obtained through the method step 102 and the subsequent steps of the present invention, the to-be-processed correspondence 1 and the to-be-processed correspondence 2 are displayed, and the to-be-processed correspondence 2 is stored in the database.
Fig. 2 is a schematic diagram of a structure of a device for detecting a failure point of an optical fiber according to the present invention, the device being disposed on a device for implementing a network management system. As shown in fig. 2, comprises a lookup unit and a processing unit, wherein,
a searching unit, configured to search, when the OTDR detects one or more branch fault points, for each obtained dropped subscriber premises equipment, a to-be-processed correspondence relationship including the dropped subscriber premises equipment in a database in which the to-be-processed correspondence relationship is stored;
and the processing unit is used for deleting the branch fault points and the off-line user side equipment in the to-be-processed corresponding relation searched by the searching unit from the detected branch fault points and the obtained off-line user side equipment.
The searching unit is further configured to obtain each offline user end device.
The apparatus in fig. 2 further includes a maintenance unit, configured to determine a branch failure point and each customer premise equipment as each to-be-processed corresponding relationship when each branch failure point and each offline customer premise equipment updated by the processing unit includes one branch failure point and one or more customer premise equipment, and store the determined to-be-processed corresponding relationship in the database.
The apparatus in fig. 2 further includes a display unit, configured to display the to-be-processed corresponding relationship found by the searching unit and the to-be-processed corresponding relationship determined by the processing unit when the maintenance unit determines the to-be-processed corresponding relationship.
The display unit is further configured to: and when the maintenance unit does not determine the corresponding relation to be processed, displaying the corresponding relation to be processed searched by the searching unit, and each branch fault point and each offline user end equipment which are updated by the processing unit.
The maintenance unit is further configured to: receiving indication information for indicating the processed corresponding relation, searching the corresponding relation to be processed which is the same as the received processed corresponding relation in the database, and deleting the searched corresponding relation to be processed in the database.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A method of detecting a point of failure in an optical fiber, comprising:
when an optical time domain reflector OTDR detects one or more branch fault points, searching a to-be-processed corresponding relation containing the offline user terminal equipment in a database storing the to-be-processed corresponding relation aiming at each offline user terminal equipment in each acquired offline user terminal equipment, wherein the to-be-processed corresponding relation comprises a fault corresponding relation with the unsolved fault point, and the fault corresponding relation comprises a one-to-one corresponding relation between the fault point and the offline user terminal;
and deleting the branch fault points and the off-line user side equipment in the searched corresponding relation to be processed from the detected branch fault points and the obtained off-line user side equipment.
2. The method of claim 1, further comprising, prior to the method: and acquiring each offline user terminal device.
3. The method according to claim 1 or 2, characterized in that the method is followed by further comprising: deleting the branch fault points and the off-line user side equipment in the searched corresponding relation to be processed from the detected branch fault points and the obtained off-line user side equipment to obtain updated branch fault points and off-line user side equipment;
and if the updated branch fault points and the updated offline user end equipment comprise one branch fault point and one or more user end equipment, determining the branch fault point and the one or more user end equipment as each to-be-processed corresponding relation, and storing the determined to-be-processed corresponding relation to the database.
4. The method of claim 3, wherein if a correspondence to be processed is determined, the method further comprises: and displaying the searched corresponding relation to be processed and the determined corresponding relation to be processed.
5. The method of claim 4, wherein if no pending correspondence is determined, the method further comprises: and displaying the searched corresponding relation to be processed, and the updated branch fault points and the offline user side equipment.
6. The method of claim 3, wherein after receiving indication information indicating the processed correspondence, the method further comprises: and searching the corresponding relation to be processed which is the same as the received corresponding relation to be processed in the database, and deleting the corresponding relation to be processed which is the same as the searched corresponding relation to be processed.
7. An apparatus for detecting a failure point of an optical fiber, comprising a search unit and a processing unit, wherein,
a searching unit, configured to, when the OTDR detects one or more branch fault points, search, in a database that stores a to-be-processed correspondence relationship, for each of the obtained drop subscriber premises equipment, a to-be-processed correspondence relationship that includes the drop subscriber premises equipment, where the to-be-processed correspondence relationship includes a fault correspondence relationship in which a fault point is not solved, and the fault correspondence relationship includes a one-to-one correspondence relationship between the fault point and a drop subscriber premises;
and the processing unit is used for deleting the branch fault points and the off-line user side equipment in the to-be-processed corresponding relation searched by the searching unit from the detected branch fault points and the obtained off-line user side equipment.
8. The apparatus according to claim 7, wherein the searching unit is further configured to obtain each of the dropped customer premise equipment devices.
9. The apparatus according to claim 7 or 8, further comprising a maintenance unit, configured to determine, when the processing unit deletes, from the detected branch fault points and the obtained offline user equipment, the branch fault point in the to-be-processed correspondence relationship found by the lookup unit and each branch fault point and each offline user equipment subsequent to the offline user equipment include one branch fault point and one or more user equipment, that the one branch fault point and the one or more user equipment are respectively determined as each to-be-processed correspondence relationship, and store the determined to-be-processed correspondence relationship in the database.
10. The apparatus according to claim 9, further comprising a display unit, configured to display the to-be-processed correspondence found by the finding unit and the updated branch failure points and the updated offline user end devices obtained by the processing unit when the maintenance unit determines the to-be-processed correspondence.
11. The apparatus of claim 10, wherein the display unit is further configured to: and when the maintenance unit does not determine the corresponding relation to be processed, displaying the corresponding relation to be processed searched by the searching unit, and each branch fault point and each offline user end equipment updated by the processing unit.
12. The apparatus of claim 9, wherein the maintenance unit is further configured to: receiving indication information for indicating the processed corresponding relation, searching the database for the corresponding relation to be processed which is the same as the received processed corresponding relation, and deleting the corresponding relation to be processed which is the same as the searched corresponding relation to be processed from the database.
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| CN201510342333.7A CN106330297B (en) | 2015-06-18 | 2015-06-18 | Method and device for detecting optical fiber fault point |
| PCT/CN2016/078115 WO2016202044A1 (en) | 2015-06-18 | 2016-03-31 | Method and apparatus for detecting fault point of optical fiber |
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| CN109004974A (en) * | 2018-08-22 | 2018-12-14 | 惠安科培工业设计有限公司 | Fiber optic network fault detection means |
| CN108683452A (en) * | 2018-08-22 | 2018-10-19 | 惠安科培工业设计有限公司 | Fiber optic network fault detection system |
| CN115314358B (en) * | 2021-05-08 | 2024-04-09 | 中国移动通信集团福建有限公司 | Method and device for monitoring faults of dummy network elements of home wide network |
| CN115484141B (en) * | 2021-06-15 | 2023-08-15 | 中国移动通信集团河南有限公司 | User determination method, device, equipment and storage medium |
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| JPH10247878A (en) * | 1997-03-04 | 1998-09-14 | Kokusai Denshin Denwa Co Ltd <Kdd> | Optical transmission system, optical distributor and optical signal processing unit |
| TWI350071B (en) * | 2006-09-11 | 2011-10-01 | Univ Nat Taiwan Science Tech | Detection system for identifying faults in a passive optical network |
| CN201025711Y (en) * | 2006-09-21 | 2008-02-20 | 黄中海 | A wave division transmission system for optical cable failure self check |
| CN101183989B (en) * | 2007-12-03 | 2010-09-01 | 中兴通讯股份有限公司 | Incremental analysis method of optical synchronization transmission network alarm correlation |
| CN101547113B (en) * | 2008-03-27 | 2011-10-26 | 中兴通讯股份有限公司 | System, device and method for filtering warning information |
| CN101577648B (en) * | 2009-06-26 | 2011-08-03 | 杭州华三通信技术有限公司 | Method for determining root cause of network fault and analytic equipment thereof |
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| CN102832998B (en) * | 2012-09-12 | 2015-09-02 | 上海斐讯数据通信技术有限公司 | A kind of alarm shield collocation method |
| CN103297126B (en) * | 2013-06-07 | 2016-06-22 | 广西师范大学 | The PON line fault monitoring method of optically-based labelling method and device thereof |
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| WO2010126427A1 (en) * | 2009-04-30 | 2010-11-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for fault discovery in a passive optical network (pon) |
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