CN103856258B - Continuous fiber detecting method and device - Google Patents
Continuous fiber detecting method and device Download PDFInfo
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- CN103856258B CN103856258B CN201210495459.4A CN201210495459A CN103856258B CN 103856258 B CN103856258 B CN 103856258B CN 201210495459 A CN201210495459 A CN 201210495459A CN 103856258 B CN103856258 B CN 103856258B
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Abstract
The invention discloses a continuous fiber detecting method, and belongs to the field of the optical communication technology. The method is applied to one site; at least a fiber is connected between an outbound port and an inbound port; and the side includes at least one light emitting element. The method includes the following method that: a path which at least includes a sending terminal single board and a receiving terminal single board; according to a continuous fiber relationship, a cross is created and attenuation regulation is carried out to make light pass through the path; attenuation on the path is adjusted, and whether the light passes through an entrance of the receiving terminal single boar is judged; if no light passes through the entrance, the wrong continuous fiber in the path is determined; and if the light passes through the entrance, a theoretical light energy change value and an actual light energy change value of the path are calculated, and according to a difference therebetween, a quality of the continuous fiber in the path is determined. In the invention, the continuous fiber quality detection and the single site continuous fiber detection are realized.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a method and a device for detecting fiber connection.
Background
The Wavelength Division network refers to an optical network that adopts a Wavelength Division Multiplexing (WDM) transmission principle, and in the Wavelength Division network, signals are finally transmitted in the form of optical signals. For the service of city 1 to be transmitted to city 2, sites must be deployed in city 1, city 2 and other passing cities, and after the sites are deployed, the sites are connected by fiber cables.
Due to the fact that fiber connection in the station is complicated, manual fiber connection according to a drawing is difficult to avoid errors when the station is deployed for construction, and unqualified fiber connection is possible to be used. The errors are very difficult to find in a manual troubleshooting mode and are huge in workload, and currently, a scheme for detecting the errors is provided, and the optical fiber connection is checked based on the light emitting principle of a laser in an optical wavelength conversion Unit (OTU). The scheme is as follows: starting from an OTU, turning on a laser, adjusting attenuation on a path between the OTU and the next monitoring point, if the next monitoring point can monitor light, considering that the optical fiber on the path has no problem, if the next monitoring point cannot monitor light, considering that the optical fiber on the path has a problem, and so on, completing detection of all monitoring points.
In the technology, because a plurality of connected fibers can be detected only by light of an upstream station, the single station is not supported for fiber connection verification, fiber connection inspection cannot be supported when the station is deployed in an opening, and the condition that the connected fibers are correct but the quality of the connected fibers is poor cannot be detected, so that the detection accuracy is influenced.
Disclosure of Invention
The invention provides a fiber connection detection method and a device. The technical scheme is as follows:
in one aspect, the present invention provides a fiber connection detection method applied to a station, where at least an optical fiber is connected between an outbound port and an inbound port of the station, and the station includes at least one light emitting unit, where the method includes:
selecting a path in the site, wherein the path at least comprises a transmitting end single board and a receiving end single board;
establishing intersection according to the fiber connection relation in the station and performing attenuation adjustment to enable light to pass through the path;
adjusting the attenuation on the path, and judging whether light passes through an inlet of a receiving end single plate in the path;
if no light passes through the entrance of the receiving end single plate in the path, determining that the optical fiber connection in the path is wrong;
if the entrance of the receiving end single plate in the path has light to pass through, calculating the theoretical light energy change value and the actual light energy change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path.
With reference to the first aspect, in a first implementation manner of the first aspect, determining the quality of the optical fiber in the path according to the difference between the theoretical optical energy variation value and the actual optical energy variation value of the path includes:
calculating a difference between a theoretical light energy variation value and an actual light energy variation value of the path;
judging whether the difference value is larger than or equal to a preset value, if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
With reference to the first aspect, in a second implementation manner of the first aspect, the calculating a theoretical light energy variation value and an actual light energy variation value of the path, and determining the quality of the optical fiber in the path according to a difference between the theoretical light energy variation value and the actual light energy variation value of the path includes:
calculating a theoretical fixed loss value and an actual fixed loss value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical fixed loss value and the actual fixed loss value of the path; or,
and calculating a theoretical optical signal to noise ratio (OSNR) change value and an actual OSNR change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical OSNR change value and the actual OSNR change value of the path.
With reference to the second implementation manner of the first aspect, in a third implementation manner of the first aspect, the calculating a theoretical fixed loss value and an actual fixed loss value of the path includes:
obtaining the calibration insertion loss value of each single board in the path, and summing the obtained calibration insertion loss values of each single board to obtain a theoretical fixed loss value of the path;
and obtaining the total loss of the path and the total attenuation of the path, and subtracting the total attenuation of the path from the total loss of the path to obtain an actual fixed loss value of the path.
With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, the obtaining the total loss of the path and the total attenuation of the path includes:
subtracting the input optical power of the receiving end single board of the path from the output optical power of the transmitting end single board of the path to obtain the total loss of the path;
and acquiring attenuation values of the attenuators in the path when the attenuation on the path is adjusted, and summing the acquired attenuation values of the attenuators in the path to obtain the total attenuation of the path.
With reference to the second implementation manner of the first aspect, in a fifth implementation manner of the first aspect, the calculating a theoretical OSNR change value and an actual OSNR change value of the path includes:
calculating a theoretical OSNR change value of the path according to an OSNR value actually detected by the originating single board of the path and the influence of the optical fiber and the amplifier on the OSNR;
and subtracting the OSNR value actually detected by the receiving end single plate of the path from the OSNR value actually detected by the transmitting end single plate of the path to obtain an actual OSNR change value of the path.
In a second aspect, the present invention provides a fiber connection detecting apparatus applied to a station, at least an optical fiber being connected between an outbound port and an inbound port of the station, the station including at least one light emitting unit, the apparatus including:
a processing module, configured to select a path in the site, where the path at least includes a sending-end veneer and a receiving-end veneer, and create a cross according to a fiber connection relationship in the site and perform attenuation adjustment, so that light passes through the path;
the adjusting module is used for adjusting the attenuation on the path and judging whether light passes through an inlet of a receiving end single plate in the path or not;
the detection module is used for determining a fiber connection error in the path if no light passes through an inlet of the receiving end single plate in the path; if the entrance of the receiving end single plate in the path has light to pass through, calculating the theoretical light energy change value and the actual light energy change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path.
With reference to the second aspect, in a first implementation manner of the second aspect, the detection module includes:
the optical energy detection unit is used for calculating a difference value between a theoretical optical energy change value and an actual optical energy change value of the path, judging whether the difference value is larger than or equal to a preset value, and if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
With reference to the second aspect, in a second implementation manner of the second aspect, the detection module includes:
the loss detection unit is used for calculating a theoretical fixed loss value and an actual fixed loss value of the path and determining the quality of the optical fiber in the path according to the difference between the theoretical fixed loss value and the actual fixed loss value of the path; or,
and the optical signal to noise ratio detection unit is used for calculating a theoretical optical signal to noise ratio OSNR change value and an actual OSNR change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical OSNR change value and the actual OSNR change value of the path.
With reference to the second implementation manner of the second aspect, in a third implementation manner of the second aspect, the loss detection unit includes:
a first calculating subunit, configured to obtain a calibrated insertion loss value of each board in the path, and sum the obtained calibrated insertion loss values of each board to obtain a theoretical fixed loss value of the path;
and the second calculating subunit is used for acquiring the total loss of the path and the total attenuation of the path, and subtracting the total attenuation of the path from the total loss of the path to obtain an actual fixed loss value of the path.
With reference to the third implementation manner of the second aspect, in a fourth implementation manner of the second aspect, the second calculating subunit is configured to:
subtracting the input optical power of the receiving end single board of the path from the output optical power of the transmitting end single board of the path to obtain the total loss of the path;
and acquiring attenuation values of the attenuators in the path when the attenuation on the path is adjusted, and summing the acquired attenuation values of the attenuators in the path to obtain the total attenuation of the path.
With reference to the second implementation manner of the second aspect, in a fifth implementation manner of the second aspect, the osnr detecting unit is configured to:
calculating a theoretical OSNR change value of the path according to an OSNR value actually detected by the originating single board of the path and the influence of the optical fiber and the amplifier on the OSNR;
and subtracting the OSNR value actually detected by the receiving end single plate of the path from the OSNR value actually detected by the transmitting end single plate of the path to obtain an actual OSNR change value of the path.
The technical scheme provided by the invention has the beneficial effects that: the method comprises the steps of calculating a theoretical light energy change value and an actual light energy change value of a selected path, determining the quality of an optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path, realizing the detection of the quality of the optical fiber connection, improving the accuracy of the optical fiber connection detection, wherein a station where the selected path is located at least comprises one light-emitting unit, and at least one optical fiber is connected between an outbound port and an inbound port, so that all paths in the station are ensured to have light arrival, the optical fiber connection detection of a single station is realized, the optical fiber connection detection can be supported when the station is deployed in an open office, the cost is greatly saved, and the application is more flexible.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a multi-site network connection provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of site A in FIG. 1;
fig. 3 is a schematic diagram of the internal structure of the station B in fig. 1;
fig. 4 is a schematic structural diagram of a station for detecting a fiber connection according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another station for fiber connection detection provided by the embodiment of the present invention;
fig. 6 is a flowchart of a fiber connection detection method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an OPA section in a site according to an embodiment of the present invention;
FIG. 8 is a flow chart of a fiber connection detection method according to another embodiment of the present invention;
FIG. 9 is a schematic diagram of the total path loss provided by an embodiment of the present invention;
fig. 10 is a flowchart of a fiber connection detection method according to a further embodiment of the present invention;
fig. 11 is a structural diagram of a fiber connection detecting apparatus according to still another embodiment of the present invention.
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 with reference to the accompanying drawings.
The present invention relates to an optical communication technology. Different cities communicate with each other by deploying sites. Referring to fig. 1, a schematic diagram of a multi-site network connection provided by the present invention is shown. Site A, site B, site C, site D, site E, site F and site G are deployed between city 1 and city 2. The stations are connected through optical fibers to realize the transmission of optical signals.
The station related by the invention is a station formed by combining a network element at the same place or a plurality of network elements which are connected through optical fibers and network cables and can communicate. For example, a plurality of network elements located in the same computer room are used as a station. A site may also be referred to as a single site. Single-site detection refers to detection that is performed independently without any assistance from other sites. A network element usually comprises a plurality of boards, and thus a station can also be considered to be composed of one or more boards. The veneer to which the present invention relates includes but is not limited to: OTU, reconfigurable optical add/drop multiplexer (roadm Multiplexing unit, RDU), Wavelength selective Switching demultiplexer (WSD), Wavelength selective Switching multiplexer (WSM), Optical Amplifier (OA), and so on.
In the present invention, the light emitting unit refers to a device capable of generating an optical signal, such as an OTU single board with a laser, and the laser is provided therein, so that the optical signal can be generated by the laser. Generally, a lighting unit may be included in one site, or there may not be a lighting unit, and when the lighting unit is included, one lighting unit may be included, or a plurality of lighting units may be included, which is not specifically limited in the present invention.
Referring to fig. 2, the internal structure of the station a in fig. 1 is schematically shown. The station A is internally provided with single boards such as an OTU, a WSM, a WSD and an OA, and is connected with the station B and the station E through an outbound optical amplifier and an inbound optical amplifier. Fig. 3 is a schematic diagram of the internal structure of the station B in fig. 1. Site B has OA, WSM, WSD therein, and is connected to site C via the outbound optical amplifier and the inbound optical amplifier. The station B has no light emitting unit, and therefore cannot generate an optical signal by itself and can receive an optical signal transmitted from another station.
The method for detecting the connection of the optical fiber provided by the embodiment of the invention is applied to a station, at least an optical fiber is connected between an outbound port and an inbound port of the station, and the station comprises at least one light-emitting unit. Preferably, the optical fiber connected between the outbound port and the inbound port of the site is an optical fiber with proper attenuation, the optical fiber with proper attenuation is connected to simulate a real network environment, and an environment in which both the inbound port and the outbound port of the site are connected with other sites through optical fibers is simulated, so that a physical environment during fiber connection detection is closer to the real network environment, and the detection accuracy can be improved. The properly attenuated optical fiber generally comprises an optical fiber and a solid attenuation, the solid attenuation can be inserted with the optical fiber or pulled out of the optical fiber, and different solid attenuations can be selected to be connected with the optical fiber according to the actual environment. Of course, other devices besides the properly attenuated optical fiber may be connected between the outbound port and the inbound port of the station, and the present invention is not limited to this.
When a plurality of light-emitting units are arranged in the station, only one light-emitting unit is preferably set to be in an operating state at the same moment when fiber connection detection is carried out. When there is no light-emitting unit in a site, before performing fiber connection detection, a light-emitting unit may be connected in the site, thereby performing fiber connection detection.
Fig. 4 is a schematic structural diagram of a station for fiber connection detection. An optical fiber is connected between the outbound OA and the inbound OA on the right side of the site A, and an optical fiber is also connected between the outbound OA and the inbound OA on the lower side of the site, so that all single boards inside the site A form a loop, wherein optical signals generated by the OTU can be transmitted along the loop, and all paths have optical signals to reach.
Referring to fig. 5, a schematic diagram of another station structure for fiber connection detection is shown. The site B is internally provided with no light-emitting unit originally, when the fiber connection detection is carried out, an OTU single board can be connected with the site B, and optical fibers are connected between the outbound OA and the inbound OA at the left side and the right side, so that a loop is formed by all the single boards in the site B, wherein optical signals generated by the OTU can be transmitted along the loop, and the optical signals can reach all the paths.
Referring to fig. 6, an embodiment of the present invention provides a fiber connection detection method applied to a station, where at least an optical fiber is connected between an outbound port and an inbound port of the station, and the station includes at least one light emitting unit, where the method includes:
601: selecting a path in the site, wherein the path at least comprises a transmitting end single board and a receiving end single board.
In this embodiment, the optical fiber connected between the outbound port and the inbound port of the station may be an optical fiber with appropriate attenuation, so as to simulate a network environment more truly and improve the accuracy of detection. Preferably, only one light-emitting unit in the station is operated to perform fiber connection detection at the same time.
In this embodiment, the path is a unit for detecting a connection fiber in the present invention, and refers to a path of optical transmission in a station, and the path is a unidirectional path and includes two or more boards. One of the boards is a starting board of the path, and one of the boards is a receiving board of the path, and the transmission direction of the optical signal is from the starting board to the receiving board. Of course, the path may have other boards besides the originating board and the terminating board, such as WSD, WSM, and the like, which is not specifically limited in the present invention. The path is composed of a transmitting end single board, a receiving end single board, other single boards in the middle and connecting fibers.
In the present invention, the path may be embodied as an Optical Power Adjust (OPA) segment. Referring to fig. 7, a schematic diagram of the structure of the OPA section in the site provided by the present invention is shown. The OPA section includes three types: OTU-OA section, OA-OTU section. Wherein, the transmitting end single board in the OTU-OA section is OTU, and the receiving end single board is OA. The transmitting end single board and the receiving end single board in the OA-OA section are both OA. The transmitting end single board in the OA-OTU section is OA, and the receiving end single board is OTU. In each OPA section, other boards besides OTU and OA, such as WSD, WSM, etc., may be further included between the originating board and the receiving board.
Of course, the path in this embodiment may also be a path between other types of boards besides the OTU and OA, such as a path between the WSD and the WSM, or a path between the WSD and the WSD, or a path between the WSM and the WSM, or a path between the WSM and the WSD, and the like, which is not specifically limited in this invention.
602: and creating intersection according to the fiber connection relation in the station and performing attenuation adjustment to enable the light to pass through the path.
The fiber connection relationship in the site refers to the connection relationship between the single boards in the site, and the internal topology structure of the site can be determined according to the fiber connection relationship. When the fiber connection detection is performed, only one light-emitting unit in the station emits light, and the creating of the intersection refers to configuring the intersection parameters of the single boards passing through the path from the light-emitting unit to the receiving end single board of the path, so that the optical signals generated by the light-emitting unit can be transmitted along the path and transmitted to the receiving end single board of the path. The attenuation adjustment is performed before the optical signal enters the path.
603: adjusting the attenuation on the path, judging whether the entrance of the receiving end single board in the path has light to pass through, if the entrance of the receiving end single board in the path has no light to pass through, executing 604; if there is light passing through the entrance of the terminating board in the path, then 605 is executed.
In this embodiment, each board in the site generally has an attenuator for performing adjustment of attenuation on the optical signal passing through, and the attenuator has an adjustable range in which the attenuator can adjust to increase the attenuation of the optical signal or adjust to decrease the attenuation of the optical signal.
604: and determining the fiber connection error in the path, and ending the process.
605: and calculating a theoretical light energy change value and an actual light energy change value of the path, determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path, and ending the process.
In the case of step 605, it may be determined that the fiber connection in the path is correct, and in particular, the quality of the fiber connection in the path is further detected through step 605.
Preferably, when light passes through the entrance of the terminating board in the path, the attenuation on the path may be further adjusted to make the difference between the input optical power of the terminating board and the nominal input optical power of the terminating board smaller than a specified value, and then the theoretical optical energy change value and the actual optical energy change value of the path are calculated, thereby improving the accuracy of detection. The specified value is a preset critical value, when the difference value between the input optical power of the receiving end single board and the nominal input optical power of the receiving end single board is smaller than the specified value, the input optical power of the receiving end single board is considered to reach the nominal value, otherwise, the input optical power of the receiving end single board is considered to not reach the nominal value. The present invention is not limited to the specific numerical values of the specified values.
In an implementation manner of this embodiment, determining the quality of the optical fiber in the path according to the difference between the theoretical optical energy variation value and the actual optical energy variation value of the path may include:
calculating the difference between the theoretical light energy change value and the actual light energy change value of the path;
judging whether the difference value is larger than or equal to a preset value, if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
The preset value can be preset as required, the value is a critical value and is used for identifying whether the change of the light energy is within an acceptable range, when the difference value between the theoretical light energy change value and the actual light energy change value of the path is smaller than the preset value, the change of the light energy is considered to be acceptable, and the quality of the connected fibers in the path is determined to meet the requirement; and conversely, when the difference value between the theoretical light energy change value and the actual light energy change value of the path is greater than or equal to the preset value, the change of the light energy is considered to be unacceptable, and the connected fiber quality in the path is determined to be not up to the requirement.
In this embodiment, a path in a station is detected as an example, and since the path may be any path, when there are multiple paths in a station, fiber connection detection may be performed on each path one by one according to the above method, so that fiber connection detection for the station is completed, and detailed descriptions are omitted.
In the method provided by this embodiment, the theoretical light energy change value and the actual light energy change value of the selected path are calculated, and the quality of the optical fiber in the path is determined according to the difference between the theoretical light energy change value and the actual light energy change value of the path, so that the detection on the quality of the optical fiber connection is realized, and the accuracy of the optical fiber connection detection is improved.
Referring to fig. 8, an embodiment of the present invention provides a fiber connection detection method applied to a station, where at least an optical fiber is connected between an outbound port and an inbound port of the station, and the station includes at least one light emitting unit, where the method includes:
801: selecting a path in the site, wherein the path at least comprises a transmitting end single board and a receiving end single board.
802: and creating intersection according to the fiber connection relation in the station and performing attenuation adjustment to enable the light to pass through the path.
803: adjusting the attenuation on the path, judging whether the entrance of the receiving end single board in the path has light to pass through, if the entrance of the receiving end single board in the path has no light to pass through, executing 804; if there is light passing through the entrance of the terminating board in the path, 805 is executed.
Specifically, the attenuation of light passing through each board on the path may be adjusted, so that the output optical power of the originating board and the input optical power of the terminating board of the path are both as nominal as possible.
804: and determining the fiber connection error in the path, and ending the process.
805: and acquiring the calibration insertion loss value of each single board in the path, and summing the acquired calibration insertion loss values of each single board to obtain the theoretical fixed loss value of the path.
Preferably, when light passes through an inlet of the receiving end single board in the path, the attenuation on the path may be further adjusted to make a difference between the input optical power of the receiving end single board and the nominal input optical power of the receiving end single board smaller than a specified value, and then the theoretical fixed loss value of the path is calculated, so as to improve the accuracy of detection. The specified value is a preset critical value, when the difference value between the input optical power of the receiving end single board and the nominal input optical power of the receiving end single board is smaller than the specified value, the input optical power of the receiving end single board is considered to reach the nominal value, otherwise, the input optical power of the receiving end single board is considered to not reach the nominal value. The present invention is not limited to the specific numerical values of the specified values.
In this embodiment, each board in the site is marked with a calibrated insertion loss value, and usually, the calibrated insertion loss value is obtained through actual detection and calibrated in the board when the board leaves a factory, and the calibrated insertion loss value can be queried through board software. Insertion loss refers to insertion loss, expressed in decibels dB. The insertion loss in the optical system represents the ratio of the outgoing light power to the incoming light power of the light energy after transmission through the insertion device.
In general, the loss of optical power during transmission includes three components: the first part is that the connection fiber has certain optical power loss, and a complete station in-connection fiber has very small optical power loss, and the more the connection fiber is aged, the worse the quality is, the larger the loss is; in the second part, when light passes through the optical device in the single plate, insertion loss is generated; and the third part, the attenuation of the attenuator on the board, which is settable and adjustable. In the present invention, the first part and the second part are both fixed losses of the hardware to the optical power at one moment, which is referred to as fixed loss for short, and the loss of the parts is not adjustable. The theoretical fixed loss value means that the loss of the first part is very small and can be ignored, and the fixed loss is only insertion loss. The actual fixed loss values include the link loss and the insertion loss, which may cause the link itself to be lossy due to changes in the quality of the link.
806: and subtracting the input optical power of the receiving end single board of the path from the output optical power of the transmitting end single board of the path to obtain the total loss of the path.
Referring to fig. 9, a diagram of the total loss of one path is shown. The path includes originating board OA1, intermediate boards WSD and WSM, and receiving board OA 2. Where the output optical power of OA1 can be represented as Pout, and the input optical power of OA2 can be represented as Pin, Pout-Pin represents the total loss of the path.
807: and acquiring attenuation values of the attenuators in the path when the attenuation on the path is adjusted, and summing the acquired attenuation values of the attenuators in the path to obtain the total attenuation of the path.
808: and subtracting the total attenuation of the path from the total loss of the path to obtain an actual fixed loss value of the path.
809: and determining the quality of the optical fiber in the path according to the difference between the theoretical fixed loss value and the actual fixed loss value of the path, and ending the process.
Specifically, step 809 may include:
calculating a difference between the theoretical fixed loss value and the actual fixed loss value of the path;
judging whether the difference value is larger than or equal to a preset value, if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
The preset value may be set as required, for example, set to 2.5dB, 3dB, etc., which is not limited in the present invention.
In the method provided by this embodiment, the theoretical light energy change value and the actual light energy change value of the selected path are calculated, and the quality of the optical fiber in the path is determined according to the difference between the theoretical light energy change value and the actual light energy change value of the path, so that the detection on the quality of the optical fiber connection is realized, and the accuracy of the optical fiber connection detection is improved.
Referring to fig. 10, an embodiment of the present invention provides a fiber connection detection method applied to a station, where at least an optical fiber is connected between an outbound port and an inbound port of the station, and the station includes at least one light emitting unit, where the method includes:
1001: selecting a path in the site, wherein the path at least comprises a transmitting end single board and a receiving end single board.
1002: and creating intersection according to the fiber connection relation in the station and performing attenuation adjustment to enable the light to pass through the path.
1003: adjusting attenuation on the path, judging whether light passes through an inlet of a receiving end single board in the path, and if no light passes through the inlet of the receiving end single board in the path, executing 1004; if there is light passing through the entrance of the terminating board in the path, 1005 is executed.
1004: and determining the fiber connection error in the path, and ending the process.
1005: and calculating the theoretical OSNR change value of the path according to the optical signal-to-noise Ratio (OSNR) value actually detected by the transmitting end single plate of the path and the influence of the optical fiber and the amplifier on the OSNR.
Preferably, when light passes through an inlet of the receiving end board in the path, the attenuation on the path may be further adjusted to make a difference between the input optical power of the receiving end board and the nominal input optical power of the receiving end board smaller than a specified value, and then the theoretical OSNR change value of the path is calculated, so as to improve the accuracy of detection. The specified value is a preset critical value, when the difference value between the input optical power of the receiving end single board and the nominal input optical power of the receiving end single board is smaller than the specified value, the input optical power of the receiving end single board is considered to reach the nominal value, otherwise, the input optical power of the receiving end single board is considered to not reach the nominal value. The present invention is not limited to the specific numerical values of the specified values.
In this embodiment, step 1005 may specifically include:
the theoretical OSNR change value of the path is calculated according to the OSNR actually detected by the originating board of the path, the fiber length of the path, the OA type, the OA noise coefficient, the gain on OA, and the like, and may be calculated by using a general algorithm, but the specific algorithm is not limited in the present invention. The noise coefficient is a coefficient used for measuring the noise level of the amplifier, and NF = input signal-to-noise ratio/output signal-to-noise ratio, and the unit is usually "dB".
1006: and subtracting the OSNR value actually detected by the receiving end single plate of the path from the OSNR value actually detected by the transmitting end single plate of the path to obtain an actual OSNR change value of the path.
1007: and determining the quality of the optical fiber in the path according to the difference between the theoretical OSNR change value and the actual OSNR change value of the path, and ending the process.
Specifically, step 1007 may include:
calculating a difference between the theoretical OSNR change value and the actual OSNR change value of the path;
judging whether the difference value is larger than or equal to a preset value, if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
In the method provided by this embodiment, the theoretical light energy change value and the actual light energy change value of the selected path are calculated, and the quality of the optical fiber in the path is determined according to the difference between the theoretical light energy change value and the actual light energy change value of the path, so that the detection on the quality of the optical fiber connection is realized, and the accuracy of the optical fiber connection detection is improved.
Referring to fig. 11, another embodiment of the present invention provides a fiber connection detecting apparatus applied to a station having at least an optical fiber connected between an outbound optical drop and an inbound optical drop, the station including at least one light emitting unit, the apparatus including:
a processing module 1101, configured to select a path in the site, where the path at least includes a sending-end veneer and a receiving-end veneer, and create a cross according to a fiber connection relationship in the site and perform attenuation adjustment, so that light passes through the path;
an adjusting module 1102, configured to adjust attenuation on the path, and determine whether light passes through an inlet of a terminating board in the path;
a detection module 1103, configured to determine that a fiber connection error in the path exists if no light passes through an inlet of the terminating board in the path; if the entrance of the receiving end single plate in the path has light to pass through, calculating the theoretical light energy change value and the actual light energy change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path.
Under the first embodiment, the detecting module 1103 may include:
the light energy detection unit is used for calculating a difference value between a theoretical light energy change value and an actual light energy change value of the path, judging whether the difference value is larger than or equal to a preset value, and if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
Under the second embodiment, the detecting module 1103 may include:
the loss detection unit is used for calculating a theoretical fixed loss value and an actual fixed loss value of the path and determining the quality of the optical fiber in the path according to the difference between the theoretical fixed loss value and the actual fixed loss value of the path; or,
and the optical signal to noise ratio detection unit is used for calculating a theoretical optical signal to noise ratio OSNR change value and an actual OSNR change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical OSNR change value and the actual OSNR change value of the path.
Further, the loss detection unit may include:
the first calculating subunit is configured to obtain a calibrated insertion loss value of each single board in the path, and sum the obtained calibrated insertion loss values of each single board to obtain a theoretical fixed loss value of the path;
and the second calculating subunit is used for acquiring the total loss of the path and the total attenuation of the path, and subtracting the total attenuation of the path from the total loss of the path to obtain an actual fixed loss value of the path.
Further, the second calculation subunit may be configured to:
subtracting the input optical power of the receiving end single board of the path from the output optical power of the transmitting end single board of the path to obtain the total loss of the path;
and acquiring attenuation values of the attenuators in the path when the attenuation on the path is adjusted, and summing the acquired attenuation values of the attenuators in the path to obtain the total attenuation of the path.
In this embodiment, the osnr detecting unit may be configured to:
calculating a theoretical OSNR change value of the path according to the OSNR value actually detected by the originating single board of the path and the influence of the optical fiber and the amplifier on the OSNR;
and subtracting the OSNR value actually detected by the receiving end single plate of the path from the OSNR value actually detected by the transmitting end single plate of the path to obtain an actual OSNR change value of the path.
The apparatus provided in this embodiment may specifically be a network management device.
The device provided by the embodiment calculates the theoretical light energy change value and the actual light energy change value of the selected path, and determines the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path, so that the detection of the quality of the optical fiber connection is realized, the accuracy of the optical fiber connection detection is improved, moreover, the site where the selected path is located at least comprises one light-emitting unit, and the optical fiber is at least connected between the outbound port and the inbound port, so that all paths in the site are ensured to have light arrival, the optical fiber connection detection of a single site is realized, the optical fiber connection detection can be supported when the site is deployed in an open office, the cost is greatly saved, and the application is more flexible.
Another embodiment of the present invention provides a fiber connection detecting apparatus applied to a station, where at least an optical fiber is connected between an outbound optical fiber and an inbound optical fiber of the station, and the station includes at least one light emitting unit, the apparatus including:
a processor, configured to select a path in the site, where the path at least includes a sending-end veneer and a receiving-end veneer, and create a cross according to a fiber connection relationship in the site and perform attenuation adjustment, so that light passes through the path; adjusting the attenuation on the path, and judging whether light passes through an inlet of a receiving end single plate in the path; if no light passes through the entrance of the receiving end single board in the path, determining that the optical fiber connection in the path is wrong; if the entrance of the receiving end single plate in the path has light to pass through, calculating the theoretical light energy change value and the actual light energy change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path.
In a first embodiment, the processor may be configured to:
calculating a difference value between a theoretical light energy change value and an actual light energy change value of the path, judging whether the difference value is larger than or equal to a preset value, and if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
In a second embodiment, the processor may be configured to:
calculating a theoretical fixed loss value and an actual fixed loss value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical fixed loss value and the actual fixed loss value of the path; or,
and calculating a theoretical optical signal to noise ratio (OSNR) change value and an actual OSNR change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical OSNR change value and the actual OSNR change value of the path.
Further, the processor may be configured to:
obtaining the calibration insertion loss value of each single board in the path, and summing the obtained calibration insertion loss values of each single board to obtain the theoretical fixed loss value of the path;
and acquiring the total loss of the path and the total attenuation of the path, and subtracting the total attenuation of the path from the total loss of the path to obtain an actual fixed loss value of the path.
Further, the processor may be configured to:
subtracting the input optical power of the receiving end single board of the path from the output optical power of the transmitting end single board of the path to obtain the total loss of the path;
and acquiring attenuation values of the attenuators in the path when the attenuation on the path is adjusted, and summing the acquired attenuation values of the attenuators in the path to obtain the total attenuation of the path.
In this embodiment, the processor may be configured to:
calculating a theoretical OSNR change value of the path according to the OSNR value actually detected by the originating single board of the path and the influence of the optical fiber and the amplifier on the OSNR;
and subtracting the OSNR value actually detected by the receiving end single plate of the path from the OSNR value actually detected by the transmitting end single plate of the path to obtain an actual OSNR change value of the path.
The apparatus provided in this embodiment may specifically be a network management device.
The device provided by the embodiment calculates the theoretical light energy change value and the actual light energy change value of the selected path, and determines the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path, so that the detection of the quality of the optical fiber connection is realized, the accuracy of the optical fiber connection detection is improved, moreover, the site where the selected path is located at least comprises one light-emitting unit, and the optical fiber is at least connected between the outbound port and the inbound port, so that all paths in the site are ensured to have light arrival, the optical fiber connection detection of a single site is realized, the optical fiber connection detection can be supported when the site is deployed in an open office, the cost is greatly saved, and the application is more flexible.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A fiber connection detection method applied to a station having at least one optical fiber connected between an outbound port and an inbound port of the station, the station including at least one light emitting unit, the method comprising:
selecting a path in the site, wherein the path at least comprises a transmitting end single board and a receiving end single board;
establishing intersection according to the fiber connection relation in the station and performing attenuation adjustment to enable light to pass through the path;
adjusting the attenuation on the path, and judging whether light passes through an inlet of a receiving end single plate in the path;
if no light passes through the entrance of the receiving end single plate in the path, determining that the optical fiber connection in the path is wrong;
if the entrance of the receiving end single plate in the path has light to pass through, calculating the theoretical light energy change value and the actual light energy change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path;
the calculating a theoretical light energy change value and an actual light energy change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path includes:
and calculating a theoretical optical signal to noise ratio (OSNR) change value and an actual OSNR change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical OSNR change value and the actual OSNR change value of the path.
2. The method according to claim 1, wherein determining the quality of the optical fiber within the path based on the difference between the theoretical optical energy variation value and the actual optical energy variation value for the path comprises:
calculating a difference between a theoretical light energy variation value and an actual light energy variation value of the path;
judging whether the difference value is larger than or equal to a preset value, if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
3. The method of claim 1, wherein calculating theoretical and actual OSNR change values for the path comprises:
calculating a theoretical OSNR change value of the path according to an OSNR value actually detected by the originating single board of the path and the influence of the optical fiber and the amplifier on the OSNR;
and subtracting the OSNR value actually detected by the receiving end single plate of the path from the OSNR value actually detected by the transmitting end single plate of the path to obtain an actual OSNR change value of the path.
4. A fiber connection detection apparatus applied to a station having at least one optical fiber connected between an outbound port and an inbound port of the station, the station including at least one light emitting unit, the apparatus comprising:
a processing module, configured to select a path in the site, where the path at least includes a sending-end veneer and a receiving-end veneer, and create a cross according to a fiber connection relationship in the site and perform attenuation adjustment, so that light passes through the path;
the adjusting module is used for adjusting the attenuation on the path and judging whether light passes through an inlet of a receiving end single plate in the path or not;
the detection module is used for determining a fiber connection error in the path if no light passes through an inlet of the receiving end single plate in the path; if the entrance of the receiving end single plate in the path has light to pass through, calculating the theoretical light energy change value and the actual light energy change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical light energy change value and the actual light energy change value of the path;
the detection module comprises:
and the optical signal to noise ratio detection unit is used for calculating a theoretical optical signal to noise ratio OSNR change value and an actual OSNR change value of the path, and determining the quality of the optical fiber in the path according to the difference between the theoretical OSNR change value and the actual OSNR change value of the path.
5. The apparatus of claim 4, wherein the detection module comprises:
the optical energy detection unit is used for calculating a difference value between a theoretical optical energy change value and an actual optical energy change value of the path, judging whether the difference value is larger than or equal to a preset value, and if so, determining that the quality of the connected fibers in the path does not meet the requirement; otherwise, determining that the quality of the continuous fibers in the path meets the requirement.
6. The apparatus of claim 4, wherein the OSNR detection unit is configured to:
calculating a theoretical OSNR change value of the path according to an OSNR value actually detected by the originating single board of the path and the influence of the optical fiber and the amplifier on the OSNR;
and subtracting the OSNR value actually detected by the receiving end single plate of the path from the OSNR value actually detected by the transmitting end single plate of the path to obtain an actual OSNR change value of the path.
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| CN108710716B (en) * | 2018-03-29 | 2022-03-15 | 中国联合网络通信集团有限公司 | Design drawing generation method and device for optical amplifier station in optical transmission system |
| CN112564845B (en) * | 2019-09-10 | 2022-03-08 | 华为技术有限公司 | Method for determining logical connection and related equipment |
| CN111010629A (en) * | 2019-12-24 | 2020-04-14 | 电信科学技术第五研究所有限公司 | Optical cross network connection detection method, device, storage medium and equipment |
| CN115882942A (en) * | 2021-09-26 | 2023-03-31 | 中兴通讯股份有限公司 | Optical fiber detection method, ROADM system, server and storage medium |
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