CN113315597B - Method and device for automatically compensating attenuation of fiber cable in wavelength division system - Google Patents
Method and device for automatically compensating attenuation of fiber cable in wavelength division system Download PDFInfo
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- CN113315597B CN113315597B CN202110598099.XA CN202110598099A CN113315597B CN 113315597 B CN113315597 B CN 113315597B CN 202110598099 A CN202110598099 A CN 202110598099A CN 113315597 B CN113315597 B CN 113315597B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0221—Power control, e.g. to keep the total optical power constant
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
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Abstract
The invention relates to the field of computer software, and provides a method and a device for automatically compensating fiber cable attenuation in a wavelength division system, wherein the method comprises the following steps: acquiring a single-wave optical power value of an input monitoring wavelength through a host optical monitoring channel disc, and triggering early warning if the difference value between the single-wave optical power value of the input monitoring wavelength and a preset reference value is greater than or equal to an early warning threshold value; after receiving the early warning message, acquiring the optical power of a main optical signal output by the source-end optical amplification disc, the optical attenuation and gain of the sink-end optical amplification disc and the optical power of the input main optical signal, and calculating the difference between the gain compensation of the target optical fiber cable and the actual attenuation of the target optical fiber cable; and if the difference value between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is larger than or equal to an optimization threshold value, triggering optimization. The invention calculates the expected light attenuation and the expected gain of the host end optical amplification disc by combining early warning and automatic triggering optimization, thereby greatly reducing the workload of users and lowering the maintenance cost of the OTN.
Description
Technical Field
The invention relates to the field of computer software, in particular to a method and a device for automatically compensating attenuation of a fiber cable in a wavelength division system.
Background
An OTN (optical transport network) is a transport network based on a wavelength division multiplexing technology and organized in an optical layer, and is a next-generation backbone transport network.
The wavelength division multiplexing technology adopts a mode that a plurality of optical signal processing disks are combined through optical fiber connection among the disks to complete optical signal processing, an optical channel path can pass through a large number of optical signal processing disks, the whole path has more nodes and complex direction connection.
In the existing OTN network, a large number of optical fibers and cables often increase in attenuation during use with aging or due to some external factors such as splicing and splice closure damage, and the performance of optical signals carried on the optical path gradually deteriorates, thereby affecting the stability of services. Currently, the related configuration of the fiber cable can be optimized through manual operation, but the following problems exist: 1. early warning cannot be performed; 2. a large number of complex optical layer performance parameters need to be manually calculated and delivered to the device.
In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows:
in the existing OTN network, a large number of optical cables often increase attenuation in the using process along with aging or due to some unexpected factors such as splicing and connector box damage, so that the performance of optical signals carried on an optical channel path is gradually degraded, thereby affecting the stability of services.
The invention achieves the above purpose through the following technical scheme:
in a first aspect, the present invention provides a method for automatically compensating for attenuation of a fiber cable in a wavelength division system, including: acquiring a single-wave optical power value of an input monitoring wavelength through a host optical monitoring channel disc, and triggering early warning if the difference value between the single-wave optical power value of the input monitoring wavelength and a preset reference value is greater than or equal to an early warning threshold value;
after receiving the early warning message, acquiring the optical power of a main optical signal output by a source-end optical amplification disc, the optical attenuation and gain of a sink-end optical amplification disc and the optical power of an input main optical signal, and calculating the difference between the gain compensation of a target optical fiber cable and the actual attenuation of the target optical fiber cable; and if the difference value between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is larger than or equal to an optimization threshold value, triggering optimization.
Preferably, the source-end optical amplification disc is found from a sending end of a target optical fiber cable, and the sink-end optical amplification disc and the sink-end optical monitoring channel disc are found from a receiving end of the target optical fiber cable.
Preferably, if the difference between the input single-wave optical power value of the monitoring wavelength and the preset reference value is smaller than the early warning threshold, the host optical monitoring channel disc continues to collect the input single-wave optical power value of the monitoring wavelength after waiting for a predetermined time interval.
Preferably, after the early warning is triggered, if the difference between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is smaller than the optimization threshold, continuously updating the obtained optical power of the main optical signal output by the source-end optical amplification disc, the optical attenuation and gain of the sink-end optical amplification disc, and the optical power of the input main optical signal, and calculating the difference between the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable until the difference between the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable is greater than or equal to the optimization threshold.
Preferably, after the triggering optimization, an expected light attenuation and an expected gain of the host end optical amplification disc are obtained by calculation according to the light attenuation and gain of the host end optical amplification disc and the actual attenuation of the target fiber cable, the obtained expected light attenuation and expected gain of the host end optical amplification disc are issued to the host end optical amplification disc, the host end optical monitoring channel disc is instructed to stop reporting the early warning message, and a preset reference value is updated to a single-wave optical power value of the currently input monitoring wavelength.
Preferably, the method for automatically compensating for the attenuation of the fiber cable in the wavelength division system specifically includes:
the gain compensation of the target fiber cable is equal to the gain of the sink end optical amplification disc and the optical attenuation of the sink end optical amplification disc;
the actual attenuation of the target optical fiber cable is the optical power of the main optical signal output by the source-end optical amplification disc, the optical power of the main optical signal input by the sink-end optical amplification disc, and the optical attenuation of the sink-end optical amplification disc.
Preferably, the expected light attenuation and the expected gain of the sink optical amplification disc are calculated in different manners according to whether the gain of the sink optical amplification disc is fixed or adjustable.
Preferably, after receiving the monitoring level command, the host optical monitoring channel disc enters an automatic monitoring mode to start to collect the single-wave optical power value of the input monitoring wavelength; wherein the early warning threshold is set by the monitoring level command and changes with different monitoring levels.
Preferably, after the early warning is triggered, the host optical monitoring channel disk reports the early warning message and displays a warning icon corresponding to the monitoring level.
In a second aspect, the present invention provides an apparatus for automatically compensating for attenuation of a fiber optic cable in a wavelength division system, comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor and programmed to perform the method for automatic compensation of cable attenuation in a wavelength division system according to the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the invention realizes early warning by monitoring the difference value between the single-wave optical power value of the input monitoring wavelength and the preset reference value and the magnitude of the early warning threshold value, realizes automatic trigger optimization according to the calculated difference value between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable and the magnitude of the optimization threshold value, and finally calculates the expected optical attenuation and the expected gain of the host end optical amplification disc, thereby improving the stability of service, greatly reducing the workload of users and lowering the maintenance cost of the OTN network.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flowchart of a method for automatically compensating for attenuation of a fiber optic cable in a wavelength division system according to an embodiment of the present invention;
fig. 2 is an architecture diagram of upstream and downstream stations of a target fiber cable according to a method for automatically compensating for fiber cable attenuation in a wavelength division system according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for automatically compensating for attenuation of a fiber optic cable in a wavelength division system according to an embodiment of the present invention;
fig. 4 is a flowchart of calculating an expected optical attenuation and an expected gain of a method for automatically compensating for attenuation of a fiber cable in a wavelength division system according to an embodiment of the present invention;
fig. 5 is an architecture diagram of an apparatus for automatically compensating for attenuation of a fiber optic cable in a wavelength division system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the embodiments of the present invention, the meaning of the corresponding identifier in the embodiments is as follows:
s is an actual attenuation of the target optical fiber cable, which is obtained by subtracting a sum of an optical power of a main optical signal input by the sink-end optical amplification disc and an optical attenuation of the sink-end optical amplification disc from an optical power of a main optical signal output by the source-end optical amplification disc;
g is the gain of the host optical amplification disc, and is fixed or adjustable;
gmin is the minimum gain allowed by the sink optical amplification disc;
v is the light attenuation of the host light amplification disc;
vmin is the minimum light attenuation allowed by the host end light amplification disc, and if the actual light attenuation is smaller than the minimum light attenuation, the Vmin cannot be detected by the host end light amplification disc;
v' is an ideal light attenuation of the host light amplification disk, which is related to the type of the host light amplification disk and is the theoretically best light attenuation of the host light amplification disk.
In the embodiments of the present invention, the symbol "/" indicates the meaning of having both functions, and the symbol "a and/or B" indicates that the combination between the preceding and following objects connected by the symbol includes three cases of "a", "B", "a and B".
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The invention will be described in detail below with reference to the figures and examples.
Example 1:
an embodiment 1 of the present invention provides a method for automatically compensating for fiber cable attenuation in a wavelength division system, as shown in fig. 1, including:
in step 201, a single-wave optical power value of an input monitoring wavelength is collected through a host optical monitoring channel disk.
The host end optical monitoring channel disc is used for carrying out data acquisition on the single-wave optical power value of the input monitoring wavelength after receiving a monitoring level command issued by an equipment management tool.
The equipment management tool is a software system for managing single disks such as a source-end optical amplification disk, a source-end optical monitoring channel disk, a host-end optical amplification disk and a host-end optical monitoring channel disk, and is responsible for searching corresponding single disks upstream and downstream of a target fiber cable, issuing a monitoring level command to the host-end optical monitoring channel disk, receiving an early warning message uploaded by the host-end optical monitoring channel disk and issuing a corresponding command, acquiring various parameter information acquired by the single disks and performing calculation analysis processing.
In step 202, the difference between the input single-wave optical power value of the monitoring wavelength and a preset reference value is calculated.
The preset reference value is a single-wave optical power value of a monitoring wavelength output by the source-end optical monitoring channel disc, which is theoretically input to the host-end monitoring channel disc after passing through the target optical fiber cable, and in actual calculation, the single-wave optical power value of the monitoring wavelength input to the host-end monitoring channel disc, which is measured by the host-end monitoring channel disc, is a measured value after passing through the target optical fiber cable and the host-end monitoring channel disc, so that in order to perform early warning on the optical fiber cable with large attenuation change in the using process, the difference value between the input single-wave optical power value of the monitoring wavelength and the preset reference value is calculated, and the obtained difference value between the input single-wave optical power value of the monitoring wavelength and the preset reference value is compared with the early warning threshold value for judgment.
In step 203, if the difference between the input single-wave optical power value of the monitoring wavelength and the preset reference value is greater than or equal to the early warning threshold, an early warning is triggered.
When the early warning is triggered, the host monitoring channel disc reports early warning information to the equipment management tool, and warning icons of corresponding levels are displayed on an interface of the equipment management tool to prompt that the attenuation of the current cable is changed greatly.
The early warning threshold value is set by a monitoring level command issued by the equipment management tool, and the monitoring levels of different levels correspond to different early warning threshold values.
In step 204, after receiving the warning message, the optical power of the main optical signal output by the source-end optical amplification disc, the optical attenuation and gain of the sink-end optical amplification disc, and the optical power of the input main optical signal are obtained, and the difference between the gain compensation of the target optical fiber cable and the actual attenuation of the target optical fiber cable is calculated.
Wherein the gain compensation of the target fiber cable is obtained by subtracting the optical attenuation of the sink-end optical amplification disc from the gain of the sink-end optical amplification disc; the actual attenuation of the target optical fiber cable is obtained by subtracting the sum of the optical power of the main optical signal input by the host optical amplification disc and the optical attenuation of the host optical amplification disc from the optical power of the main optical signal output by the source optical amplification disc.
In step 205, if the difference between the gain compensation of the target cable and the actual attenuation of the target cable is greater than or equal to the optimization threshold, then optimization is triggered.
The optimized threshold is set by a device management tool, and the optimized thresholds of all the single disks in the OTN are consistent.
In the embodiment of the present invention, the source-end optical amplification disc is found from an originating end of a target fiber cable, and the sink-end optical amplification disc and the sink-end optical monitoring channel disc are found from a terminating end of the target fiber cable, specifically:
as shown in fig. 2, the device management tool first finds the multiplexer/demultiplexer disk of the source site from the originating end of the target fiber cable, then finds the source-end optical amplification disk and the corresponding source-end optical monitoring channel disk through the multiplexer/demultiplexer disk of the source site, first finds the multiplexer/demultiplexer disk of the destination site from the terminating end of the target fiber cable, and then finds the destination-end optical amplification disk and the corresponding destination-end optical monitoring channel disk through the multiplexer/demultiplexer disk of the destination site; the main optical signal emitted by the source-end optical amplification disc and the monitoring wavelength emitted by the source-end optical monitoring channel disc are combined by the combining and splitting disc of the source site and then output to the target optical fiber cable, the combining and splitting disc of the host site inputs the combining and splitting signal into the combining and splitting disc of the host site, the input combining signal is transmitted to the host-end optical amplification disc and the corresponding host-end optical monitoring channel disc after being split by the combining and splitting disc of the host site, the host-end optical amplification disc collects the optical power of the input main optical signal, and the host-end optical monitoring channel disc collects the single optical power value of the input monitoring wavelength.
In the embodiment of the present invention, if the difference between the input single-wave optical power value of the monitoring wavelength and the preset reference value is smaller than the early warning threshold, the host optical monitoring channel disc continues to collect the input single-wave optical power value of the monitoring wavelength after waiting for a predetermined time interval, and continues to monitor according to the monitoring level command; the predetermined time interval is adjusted according to actual requirements.
The early warning threshold value is set by a monitoring level command issued by the equipment management tool, and the monitoring levels of different levels correspond to different early warning threshold values.
In the embodiment of the present invention, after the early warning is triggered, if the difference between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is smaller than the optimization threshold, the obtained optical power of the main optical signal output by the source-end optical amplification disc, the optical attenuation and gain of the sink-end optical amplification disc, and the optical power of the input main optical signal are continuously updated, and the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable are calculated until the difference between the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable is greater than or equal to the optimization threshold.
In the embodiment of the present invention, after the trigger optimization, an expected light attenuation and an expected gain of the host optical amplification disc are calculated according to the light attenuation and gain of the host optical amplification disc and the actual attenuation of the target fiber cable, the obtained expected light attenuation and expected gain of the host optical amplification disc are sent to the host optical amplification disc, the host optical monitoring channel disc is instructed to stop reporting the warning message, and the preset reference value is updated to the single-wave optical power value of the currently input monitoring wavelength.
In an embodiment of the present invention, the method for automatically compensating for attenuation of a fiber cable in a wavelength division system specifically includes:
the gain compensation of the target fiber cable is equal to the gain of the sink end optical amplification disc-the optical attenuation of the sink end optical amplification disc;
the actual attenuation of the target fiber cable is the optical power of the main optical signal output by the source-end optical amplification disc, the optical power of the main optical signal input by the sink-end optical amplification disc, and the optical attenuation of the sink-end optical amplification disc;
the gain of the host optical amplification disc is the gain set by the host optical amplification disc, and is fixed or adjustable according to the type of the host optical amplification disc; the light attenuation of the host end light amplification disc is the light attenuation set by the host end light amplification disc and is adjustable; the optical power of the main optical signal output by the source end optical amplification disc and the optical power of the main optical signal input by the sink end optical amplification disc are both acquired test values.
In the embodiment of the present invention, the calculation modes of the expected light attenuation and the expected gain of the sink optical amplification disc are different according to whether the gain of the sink optical amplification disc is fixed or adjustable.
Wherein, under the condition that the gain G of the sink optical amplification disc is fixed, the calculated expected gain of the sink optical amplification disc and the pre-calculated expected light attenuation of the sink optical amplification disc are output as the final expected gain and the expected light attenuation of the sink optical amplification disc.
Under the condition that the gain G of the host-end optical amplification disc is adjustable, the expected optical attenuation and the expected gain of the host-end optical amplification disc are calculated in different manners according to the difference between the current value V of the optical attenuation of the host-end optical amplification disc and the ideal optical attenuation V' of the host-end optical amplification disc.
In the embodiment of the invention, after receiving a monitoring level command, the host optical monitoring channel disc enters an automatic monitoring mode and starts to collect the single-wave optical power value of the input monitoring wavelength; wherein the early warning threshold is set by the monitoring level command and changes with different monitoring levels.
In the embodiment of the invention, after the early warning is triggered, the host optical monitoring channel disc reports the early warning message and displays the warning icon corresponding to the monitoring level.
Wherein, in case that the early warning is triggered but the optimization cannot be triggered, the user can eliminate the warning icon by lowering the monitoring level or manually triggering the optimization.
Example 2:
in a specific scenario, an embodiment of the present invention provides a method for automatically compensating for attenuation of a fiber cable in a wavelength division system, as shown in fig. 3, including:
in step 301, a source optical amplification disc and a source optical monitoring channel disc are searched from the upstream of the target fiber cable, and a sink optical amplification disc and a sink optical monitoring channel disc are searched from the downstream of the target fiber cable.
In step 302, after the device management tool issues a monitoring level command to the host optical monitoring channel disc, the host optical monitoring channel disc enters an automatic monitoring mode.
In step 303, the device management tool collects the single-wave optical power value of the input monitoring wavelength through the host optical monitoring channel disk.
In step 304, the device management tool calculates a difference between the single-wave optical power value of the input monitoring wavelength and a preset reference value;
if the difference between the single-wave optical power value of the input monitoring wavelength and the preset reference value is smaller than the early warning threshold, the step 303 is skipped, and the host optical monitoring channel disc continues to collect the single-wave optical power value of the input monitoring wavelength after waiting for a predetermined time interval, and continues to monitor according to the monitoring level command.
If the difference between the single-wave optical power value of the input monitoring wavelength and the preset reference value is greater than or equal to the early warning threshold, step 305 is entered, and the host optical monitoring channel disk reports an early warning message to the device management tool to trigger early warning.
In step 306, after receiving the warning message, the device management tool obtains the optical power of the main optical signal output by the source-end optical amplification disc, the optical attenuation and gain of the sink-end optical amplification disc, and the optical power of the input main optical signal.
In step 307, the difference between the gain compensation of the target cable and the actual attenuation of the target cable is calculated from the above parameters.
If the difference between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is smaller than the optimization threshold, the process goes back to step 306, the obtained optical power of the main optical signal output by the source-end optical amplification disc, the optical attenuation and gain of the sink-end optical amplification disc, and the optical power of the input main optical signal are continuously updated, and the difference between the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable is calculated until the difference between the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable is greater than or equal to the optimization threshold.
And if the difference value between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is larger than or equal to the optimization threshold value, the step 308 is carried out, and optimization is triggered.
In step 309, after the triggering optimization, the device management tool calculates an expected light attenuation and an expected gain of the host optical amplification disc according to the light attenuation and gain of the host optical amplification disc and the actual attenuation of the target fiber cable, sends the obtained expected light attenuation and expected gain of the host optical amplification disc to the host optical amplification disc, instructs the host optical monitoring channel disc to stop reporting the early warning message to the device management tool, and updates a preset reference value to a single-wave optical power value of the currently input monitoring wavelength.
The equipment management tool is a software system for managing single disks such as a source-end optical amplification disk, a source-end optical monitoring channel disk, a host-end optical amplification disk and a host-end optical monitoring channel disk, and is responsible for searching corresponding single disks upstream and downstream of a target fiber cable, issuing a monitoring level command to the host-end optical monitoring channel disk, receiving an early warning message uploaded by the host-end optical monitoring channel disk and issuing a corresponding command, acquiring various parameter information acquired by the single disks and performing calculation analysis processing.
The single disks such as the source light amplification disk, the source light monitoring channel disk, the sink light amplification disk and the sink light monitoring channel disk are used for collecting real-time data.
The gain compensation of the target fiber cable is obtained by subtracting the light attenuation of the sink end optical amplification disc from the gain of the sink end optical amplification disc.
The actual attenuation of the target optical fiber cable is obtained by subtracting the sum of the optical power of the main optical signal input by the host optical amplification disc and the optical attenuation of the host optical amplification disc from the optical power of the main optical signal output by the source optical amplification disc.
The gain of the host optical amplification disc is the gain set by the host optical amplification disc, and is fixed or adjustable according to the type of the host optical amplification disc; the light attenuation of the host end light amplification disc is the light attenuation set by the host end light amplification disc and is adjustable; the optical power of the main optical signal output by the source end optical amplification disc and the optical power of the main optical signal input by the sink end optical amplification disc are both acquired test values.
And calculating the expected light attenuation and the expected gain of the host end optical amplification disc in different modes according to the fact that the gain of the host end optical amplification disc is fixed or adjustable.
Example 3:
according to the embodiment 2, the gain of the host optical amplification disc is fixed or adjustable, and the calculation modes of the expected light attenuation and the expected gain of the host optical amplification disc are different, and the specific process is as follows:
as shown in fig. 4, when the gain G of the sink optical amplification disc is fixed, the process proceeds to step 401, and the expected light attenuation and the expected gain of the sink optical amplification disc are calculated in the following manner:
the desired gain of the sink optical amplification disc is G;
the expected light attenuation of the host light amplification disc is G-S;
and outputting the calculated expected gain of the sink end optical amplification disc and the pre-calculated expected light attenuation of the sink end optical amplification disc as the final expected gain and the expected light attenuation of the sink end optical amplification disc.
Under the condition that the gain G of the host optical amplification disc is adjustable, according to the difference between the current value V of the optical attenuation of the host optical amplification disc and the ideal optical attenuation V' of the host optical amplification disc, the calculation modes of the expected optical attenuation and the expected gain of the host optical amplification disc are different, specifically:
when V is greater than V', step 402 is performed to calculate the expected light attenuation and the expected gain of the sink optical amplification disc to obtain a newly calculated expected gain of the sink optical amplification disc and a newly calculated expected light attenuation of the sink optical amplification disc, where the calculation method is as follows:
newly calculated expected gain of the sink optical amplification disc is Gmin;
the newly calculated expected light attenuation of the sink light amplification disc is Gmin-S.
When V is less than or equal to V', step 403 is performed to pre-calculate the expected light attenuation and the expected gain of the host optical amplification disc to obtain the pre-calculated expected gain of the host optical amplification disc and the pre-calculated expected light attenuation of the host optical amplification disc, where the calculation method is as follows:
pre-calculating the expected gain G of the sink end optical amplification disc;
and G-S is the expected light attenuation of the pre-calculated sink end light amplification disc.
And when Vmin is less than the expected light attenuation of the pre-calculated sink end optical amplification disc and less than V', the pre-calculated expected light attenuation of the sink end optical amplification disc meets the actual requirement, and the pre-calculated expected gain of the sink end optical amplification disc and the pre-calculated expected light attenuation of the sink end optical amplification disc are used as the final expected gain and the final expected light attenuation of the sink end optical amplification disc to be output.
When the pre-calculated expected light attenuation of the host-end optical amplification disc is less than Vmin, the method proceeds to step 404, and the expected light attenuation and the expected gain of the host-end optical amplification disc are re-calculated to obtain the re-calculated expected gain of the host-end optical amplification disc and the re-calculated expected light attenuation of the host-end optical amplification disc, where the calculation method is as follows:
the recalculated expected gain of the host optical amplification disc is Vmin;
the recalculated expected light attenuation of the host end light amplification disc is S + Vmin;
and outputting the recalculated expected gain of the sink end optical amplification disc and the pre-calculated expected light attenuation of the sink end optical amplification disc as the final expected gain and the final expected light attenuation of the sink end optical amplification disc.
When the pre-calculated expected light attenuation of the host-end optical amplification disc is greater than V', the process jumps to step 402, and recalculates the expected light attenuation and the expected gain of the host-end optical amplification disc to obtain the newly calculated expected gain of the host-end optical amplification disc and the newly calculated expected light attenuation of the host-end optical amplification disc, where the calculation method is as follows:
newly calculated expected gain of the sink optical amplification disc is Gmin;
the newly calculated expected light attenuation of the sink light amplification disc is Gmin-S.
When the newly calculated expected light attenuation of the host optical amplification disc obtained in step 402 is less than Vmin, the process jumps to step 404, and recalculates the expected light attenuation and the expected gain of the host optical amplification disc to obtain the recalculated expected gain of the host optical amplification disc and the recalculated expected light attenuation of the host optical amplification disc, where the calculation method is as follows:
the recalculated expected gain of the sink optical amplification disc is Vmin;
the recalculated expected light attenuation of the host end light amplification disc is S + Vmin;
and outputting the recalculated expected gain of the sink end optical amplification disc and the pre-calculated expected light attenuation of the sink end optical amplification disc as the final expected gain and the final expected light attenuation of the sink end optical amplification disc.
And when the newly calculated expected light attenuation of the sink end optical amplification disc obtained in the step 402 is greater than or equal to Vmin, the newly calculated expected light attenuation of the sink end optical amplification disc meets actual requirements, and the newly calculated expected gain of the sink end optical amplification disc and the newly calculated expected light attenuation of the sink end optical amplification disc are used as the final expected gain and the final expected light attenuation of the sink end optical amplification disc to be output.
Example 4:
the embodiment of the invention provides a device for automatically compensating attenuation of a fiber cable in a wavelength division system, which comprises at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions programmed to perform the method for automatic compensation of cable attenuation in a wavelength division system of embodiment 1 above.
Fig. 5 is a schematic structural diagram of an apparatus for automatically compensating for attenuation of a fiber in a wavelength division system according to an embodiment of the present invention. The device for automatically compensating for the attenuation of the fiber cable in the wavelength division system of the present embodiment includes one or more processors 21 and a memory 22. In fig. 5, one processor 21 is taken as an example.
The processor 21 and the memory 22 may be connected by a bus or other means, and fig. 5 illustrates the connection by a bus as an example.
The memory 22 is used as a non-volatile computer-readable storage medium for storing a non-volatile software program and a non-volatile computer-executable program, such as the method for automatically compensating for the attenuation of the fiber optic cable in the wavelength division system in embodiment 1. The processor 21 implements a method for automatically compensating for fiber optic cable attenuation in a wavelength division system by executing non-volatile software programs and instructions stored in the memory 22.
The memory 22 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 22 may optionally include memory located remotely from the processor 21, and these remote memories may be connected to the processor 21 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The program instructions/modules are stored in the memory 22 and, when executed by the one or more processors 21, perform the method for automatic compensation of cable attenuation in a wavelength division system according to embodiment 1, for example, perform the steps illustrated in fig. 1 and described above.
It should be noted that, because the contents of information interaction, execution process, and the like between the modules and units in the device are based on the same concept as the processing method embodiment of the present invention, specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.
Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for automatically compensating for cable attenuation in a wavelength division system, comprising:
acquiring a single-wave optical power value of an input monitoring wavelength through a host optical monitoring channel disc, and triggering early warning if the difference value between the single-wave optical power value of the input monitoring wavelength and a preset reference value is greater than or equal to an early warning threshold value;
after receiving the early warning message, acquiring the optical power of a main optical signal output by the source-end optical amplification disc, the optical attenuation and gain of the sink-end optical amplification disc and the optical power of the input main optical signal, and calculating the difference between the gain compensation of the target optical fiber cable and the actual attenuation of the target optical fiber cable; and if the difference value between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is larger than or equal to an optimization threshold value, triggering optimization.
2. The method of claim 1, wherein the source optical amplifier disk is located from an originating end of the target fiber cable, and the sink optical amplifier disk and the sink optical supervisory channel disk are located from a terminating end of the target fiber cable.
3. The method according to claim 1, wherein if the difference between the single-wave power value of the input monitoring wavelength and the preset reference value is smaller than the pre-warning threshold, the host-end optical monitoring channel disc continues to collect the single-wave power value of the input monitoring wavelength after waiting for a predetermined time interval.
4. The method according to claim 1, wherein after the pre-warning is triggered, if the difference between the gain compensation of the target fiber cable and the actual attenuation of the target fiber cable is smaller than the optimization threshold, the obtained optical power of the main optical signal output by the source-side optical amplifier disk and the optical attenuation, gain and optical power of the main optical signal input by the sink-side optical amplifier disk are continuously updated, and the difference between the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable is calculated until the difference between the gain compensation of the corresponding target fiber cable and the actual attenuation of the target fiber cable is greater than or equal to the optimization threshold.
5. The method according to claim 1, wherein after the trigger optimization, an expected light attenuation and an expected gain of the host optical amplification disc are calculated according to the light attenuation and gain of the host optical amplification disc and the actual attenuation of the target fiber cable, the obtained expected light attenuation and expected gain of the host optical amplification disc are sent to the host optical amplification disc, the host optical monitoring channel disc is instructed to stop reporting the warning message, and a preset reference value is updated to a single-wavelength optical power value of the currently input monitoring wavelength.
6. The method of claim 4 or 5, wherein the method further comprises:
the gain compensation of the target fiber cable is the gain of the sink end optical amplification disc-the optical attenuation of the sink end optical amplification disc;
the actual attenuation of the target optical fiber cable is the optical power of the main optical signal output by the source end optical amplification disc-the optical power of the main optical signal input by the sink end optical amplification disc-the optical attenuation of the sink end optical amplification disc.
7. The method of claim 5, wherein the desired attenuation and the desired gain of the host optical amplification disc are calculated differently according to whether the gain of the host optical amplification disc is fixed or adjustable.
8. The method of claim 1, wherein the host optical supervisory channel disk enters an automatic supervisory mode after receiving supervisory level commands, and starts to collect the single wave optical power values of the input supervisory wavelengths; wherein the early warning threshold is set by the monitoring level command and changes with different monitoring levels.
9. The method according to claim 8, wherein after the pre-warning is triggered, the host optical supervisory channel reports a pre-warning message to display a warning icon corresponding to the supervisory level.
10. An apparatus for automatic compensation of cable attenuation in a wavelength division system, comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions programmed to perform the method for automatic compensation of cable attenuation in a wavelength division system according to any of claims 1-9.
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| CN1588828A (en) * | 2004-10-25 | 2005-03-02 | 烽火通信科技股份有限公司 | Light relay station device for light transmission, system and its automatic fain regulating method |
| CN103490818A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Compensator and compensation method for transmission delay in optical fiber time frequency transmission |
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| JP3779176B2 (en) * | 2001-05-16 | 2006-05-24 | 富士通株式会社 | Optical transmission apparatus and wavelength division multiplexing communication system |
| CN110336609B (en) * | 2019-05-31 | 2021-03-30 | 中山大学 | Multi-span optical fiber transmission system optimization method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1588828A (en) * | 2004-10-25 | 2005-03-02 | 烽火通信科技股份有限公司 | Light relay station device for light transmission, system and its automatic fain regulating method |
| CN103490818A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Compensator and compensation method for transmission delay in optical fiber time frequency transmission |
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