CN108234016B - Optical network protection control method, device and network management server - Google Patents
Optical network protection control method, device and network management server Download PDFInfo
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- CN108234016B CN108234016B CN201611130877.8A CN201611130877A CN108234016B CN 108234016 B CN108234016 B CN 108234016B CN 201611130877 A CN201611130877 A CN 201611130877A CN 108234016 B CN108234016 B CN 108234016B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
Abstract
The embodiment of the invention provides an optical network protection control method, an optical network protection control device and a network management server, wherein performance parameters of an optical fiber link are obtained through a performance monitoring module arranged on the optical fiber link of an optical network, and the obtained performance parameters of the optical fiber link comprise at least one of optical fiber performance parameters and optical signal transmission performance parameters; and judging whether the optical network needs to be protected currently according to the acquired optical fiber link performance parameters, if so, starting the optical network protection, wherein the started optical network protection comprises at least one of power automatic reduction protection and automatic switching protection. Therefore, the invention can obtain the performance parameters of the optical fiber link and can be used as whether to trigger the starting of the optical network protection, thereby meeting the requirement of the trust operator on the attention of the optical network performance and providing more comprehensive and reliable optical network protection.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for controlling optical network protection, and a network management server.
Background
In an optical communication system, optical power is lost due to accidents such as cutting of an optical fiber, failure of equipment, or pulling out of an optical connector. On one hand, in consideration of personnel safety, an Automatic Power Reduction (APR) protection process can be started under the condition that the optical Power in an optical transmission section of the main optical channel is lost, communication is automatically recovered after an optical fiber link is normal, and the APR optical Power requirement meets the BSEN 60825-1-1994 and BSEN 60825-2-2000 standards. On the other hand, for the consideration of system Protection, APS (Automatic Protection switching) is generally added to an optical transmission link, and when a working link fails, the working link is automatically Switched to a Protection link, thereby ensuring the stability of the system.
Both conventional APR/ALS (Automatic Laser Shutdown)) and APS are triggered based on a sudden drop in optical power caused by a sudden loss of optical signal. The conventional APR and APS protection procedures are illustrated below.
Referring to the APR protection system shown in fig. 1, when the point a optical cable is broken, loss of continuity of optical transmission signal (LOC-OTS) is detected at the receiving port R2, which may result in reduction of output power of the T2 transmitting port; again, this causes LOC-OTS at the receive port R1, resulting in a reduction of the output power at the transmit port T1. This ensures that the optical power at the failed point a is at a safe level.
Referring to the APS protection system shown in fig. 2, when a path a fails, for example, a fiber is broken or an amplifier is damaged, the optical power of the path a is reduced, and when an optical switch control panel (OP board) monitors that the power difference between the path a and the path B reaches a threshold value, an APS protection switching process is started to switch a service from a working channel a to a protection channel B, thereby ensuring the reliable stability of the service.
In summary, it can be seen that both the APR and the APS processes are triggered based on sudden optical power decrease caused by sudden optical signal loss, and a protection process is triggered as long as the optical power fluctuates beyond a threshold value, but the optical fiber performance and the optical signal transmission performance of the optical fiber link are not concerned, but the optical fiber performance and the optical signal transmission performance directly affect the reliability of the communication system.
Disclosure of Invention
The embodiment of the invention provides an optical network protection control method, an optical network protection control device and a network management server, and mainly solves the technical problem that the existing optical network protection is triggered only based on the optical power change of sudden loss of optical signals, and the requirement of network development cannot be well met.
To solve the foregoing technical problem, an embodiment of the present invention provides a method for controlling optical network protection, including:
acquiring optical fiber link performance parameters through a performance monitoring module arranged on an optical fiber link of an optical network, wherein the optical fiber link performance parameters comprise at least one of optical fiber performance parameters and optical signal transmission performance parameters;
and when the optical network needs to be protected according to the acquired optical fiber link performance parameters, starting optical network protection, wherein the optical network protection comprises at least one of power automatic reduction protection and automatic switching protection.
An embodiment of the present invention further provides an optical network protection control apparatus, including:
a performance parameter obtaining module, configured to obtain a performance parameter of an optical fiber link through a performance monitoring module arranged on the optical fiber link of the optical network, where the performance parameter of the optical fiber link includes at least one of an optical fiber performance parameter and an optical signal transmission performance parameter;
and the protection control module is used for starting optical network protection when judging that the optical network needs to be protected according to the acquired optical fiber link performance parameters, wherein the optical network protection comprises at least one of power automatic reduction protection and automatic switching protection.
The embodiment of the invention also provides a network management server, which comprises the optical network protection control device.
An embodiment of the present invention further provides a computer storage medium, where a computer-executable instruction is stored in the computer storage medium, and the computer-executable instruction is used to execute any one of the foregoing optical network protection control methods.
The beneficial effects of the invention are:
according to the optical network protection control method, the device, the network management server and the computer storage medium provided by the embodiment of the invention, the performance monitoring module arranged on the optical fiber link of the optical network is used for acquiring the performance parameters of the optical fiber link, wherein the acquired performance parameters of the optical fiber link comprise at least one of the optical fiber performance parameters and the optical signal transmission performance parameters; and judging whether the optical network needs to be protected currently or not according to the acquired optical fiber link performance parameters, if so, starting the optical network protection, wherein the started optical network protection comprises at least one of power automatic reduction protection and automatic switching protection. Therefore, the invention can obtain the performance parameters of the optical fiber link and can be used as whether to trigger the starting of the optical network protection, thereby meeting the requirement of the trust operator on the attention of the optical network performance and providing more comprehensive and reliable optical network protection.
Drawings
FIG. 1 is a schematic diagram of conventional APR protection;
FIG. 2 is a diagram illustrating conventional APS protection;
fig. 3 is a schematic flow chart of a method for controlling optical network protection according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network management server according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a network protection control apparatus according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of an APR protection link according to a third embodiment of the present invention;
fig. 7 is a schematic diagram of an APR protection process according to a third embodiment of the present invention;
fig. 8 is a schematic diagram of an APS protection link according to a third embodiment of the present invention;
fig. 9 is a schematic diagram of an APS protection flow of the optical multiplexing section according to a third embodiment of the present invention;
fig. 10 is a schematic diagram of an APS protection process of an optical channel segment according to a third embodiment of the present invention;
fig. 11 is a schematic diagram of an integrated arrangement of a performance monitoring module and an amplifier according to a third embodiment of the present invention;
fig. 12 is a schematic diagram of independent configuration of a performance monitoring module according to a third embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 3, the optical network protection control method provided in this embodiment includes:
s301: the performance parameters of the optical fiber link are obtained through a performance monitoring module arranged on the optical fiber link of the optical network.
When the output end of the performance monitoring module in this embodiment is set on the optical fiber link, the output end of the performance monitoring module may be coupled to the output end of the amplifier on the optical fiber link. The performance parameters can be obtained by adopting various performance monitoring devices. The optical fiber link performance parameter in this embodiment may include at least one of an optical fiber performance parameter and an optical signal transmission performance parameter, and may directly include the optical fiber performance parameter and the optical signal transmission performance parameter, for example. The Optical fiber performance parameters may be obtained by an OTDR (Optical Time Domain Reflectometer) device, and the Optical signal transmission performance parameters may be obtained by an OPM (Optical performance monitoring) device.
S302: and when the optical network needs to be protected according to the acquired optical fiber link performance parameters, starting the optical network protection.
The optical network Protection in this embodiment may adopt at least one of Automatic Power Reduction (APR) Protection and Automatic Protection Switching (APS). Which protection modes are adopted can be flexibly set according to specific application scenarios, and it should be understood that the protection modes are not limited to the protection modes.
It can be seen that the present embodiment can obtain the performance parameter of the optical fiber link and use the performance parameter as whether to trigger the start of the optical network protection, so that the requirement of the carrier on the attention of the optical network performance can be met, and more comprehensive and reliable optical network protection can be provided.
In this embodiment, when the optical fiber link performance parameter obtained in S301 includes an optical fiber performance parameter, the obtained optical fiber performance parameter includes: at least one of reflection and reflection point performance parameters, total attenuation parameters and attenuation coefficients, it should be understood that which parameters are specifically contained can be flexibly determined according to factors such as specific application scenarios and network environments. At this time, the determining process of determining whether the optical network needs to be protected according to the obtained optical fiber link performance parameter in S302 includes:
when the optical fiber performance parameters comprise reflection and reflection point performance parameters, judging whether the obtained reflection and reflection point performance parameters are larger than a preset maximum reflection and reflection point performance parameter threshold value, if so, judging that the optical network needs to be protected, otherwise, indicating that the obtained reflection and reflection point performance parameters are normal; the reflection-and-reflection point performance parameter in this embodiment includes, but is not limited to, at least one of a reflection power, a reflection coefficient, and an emission point, and the corresponding maximum reflection-and-reflection point performance parameter threshold includes, but is not limited to, at least one of a maximum reflection power threshold, a maximum reflection coefficient threshold, and a maximum emission point threshold. When the reflection and reflection point performance parameters include more than two of the three parameters, it may be determined that the optical network needs to be protected as long as any one of the parameters is greater than the corresponding threshold, or it may be determined that the optical network needs to be protected when all the parameters are greater than the corresponding thresholds.
When the optical fiber performance parameters comprise total attenuation parameters, judging whether the obtained total attenuation parameters are larger than a preset maximum total attenuation parameter threshold value, if so, judging that the optical network needs to be protected; otherwise, the acquired total attenuation parameter is normal.
And when the optical fiber performance parameters comprise attenuation coefficients, judging whether the obtained attenuation coefficients are larger than a preset maximum attenuation coefficient threshold value, if so, judging that the optical network needs to be protected, otherwise, indicating that the obtained attenuation coefficients are normal.
The optical fiber performance parameters in this embodiment may also include attenuation and attenuation point parameters, the obtained parameters may not be used as conditions for optical network protection triggering, and after the parameters are detected, the parameters may be reported to a corresponding gateway server for subsequent other analysis and management.
In this embodiment, when the performance parameters of the optical fiber link obtained in S301 include the performance parameters of the optical fiber, the optical network protection may adopt power auto-reduction protection and auto-switching protection.
In this embodiment, the optical fiber link performance parameter in S301 includes an optical signal transmission performance parameter, and may also include the optical fiber performance parameter. In this embodiment, it may also be determined whether power auto-reduction protection or auto-switching protection needs to be performed on the optical network according to the optical signal transmission performance parameter. In the following, an example of triggering power auto-reduction protection or auto-switching protection according to an optical signal transmission performance parameter is described as an example.
When the power auto-reduction protection is triggered, the optical signal transmission performance parameter may include at least one of a total optical power and an optical signal-to-noise ratio;
at this time, judging whether the optical network needs to be protected according to the acquired optical fiber link performance parameters comprises:
when the optical signal transmission performance parameters comprise the total optical power, judging whether the obtained total optical power is smaller than a preset minimum optical power threshold value, if so, judging that the optical network needs to be subjected to power automatic reduction protection, otherwise, indicating that the obtained total optical power is normal;
when the optical signal transmission performance parameters comprise the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, if so, judging that the optical network needs to be subjected to power automatic reduction protection, otherwise, indicating that the obtained total optical power is normal.
Of course, the optical signal transmission performance parameters in this embodiment may also include center wavelength offset and gain flatness, but the obtained center wavelength offset and gain flatness may be used as a condition for not triggering power auto-reduction protection.
When triggering the automatic switching protection according to the optical signal transmission performance parameters, the method is suitable for the optical channel section on the optical fiber link and the optical multiplexing section on the optical fiber link. The following is an example of two cases.
When triggering automatic switching protection, if the obtained optical fiber link performance parameters include optical signal transmission performance parameters of an optical multiplexing section, the optical signal transmission performance parameters include at least one of total optical power, gain flatness and optical signal to noise ratio; at this time, the step of judging whether the optical network needs to be protected according to the acquired performance parameters of the optical fiber link includes:
when the optical signal transmission performance parameters comprise the total optical power, judging whether the obtained total optical power is greater than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic switching protection, otherwise, indicating that the obtained total optical power is normal;
when the optical signal transmission performance parameters comprise gain flatness, judging whether the obtained gain flatness reaches a preset maximum gain flatness threshold value, if so, judging that the optical network needs to be subjected to automatic switching protection; otherwise, indicating that the obtained gain flatness is normal;
when the optical signal transmission performance parameters include the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, if so, judging that the optical network needs to be automatically switched and protected, otherwise, indicating that the obtained optical signal-to-noise ratio is normal.
Of course, the optical signal transmission performance parameter in this embodiment may also include the center wavelength offset, but the obtained center wavelength offset is used as a condition for not triggering the automatic switching protection of the optical multiplexing section.
When triggering automatic switching protection, if the obtained optical fiber link performance parameters include optical signal transmission performance parameters of an optical channel section, the optical signal transmission performance parameters include at least one of central wavelength offset, total optical power and optical signal-to-noise ratio; the judging whether the optical network needs to be protected or not according to the acquired optical fiber link performance parameters comprises the following steps:
when the optical signal transmission performance parameter includes the center wavelength offset, judging whether the acquired center wavelength offset is within a preset center wavelength offset threshold range, if so, judging that the optical network needs to be subjected to automatic switching protection; otherwise, the obtained central wavelength deviation is normal;
when the optical signal transmission performance parameter includes the total optical power, judging whether the obtained total optical power is larger than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic switching protection; otherwise, the obtained total optical power is normal;
when the optical signal transmission performance parameters comprise the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, if so, judging that the automatic switching protection needs to be carried out on the optical network, otherwise, indicating that the obtained optical signal-to-noise ratio is normal.
Of course, the optical signal transmission performance parameter in this embodiment may also include gain flatness, but the obtained gain flatness is used as a condition for not triggering the automatic switching protection of the optical channel segment.
It should be understood that specific values of the thresholds in this embodiment may be set flexibly according to factors or requirements such as a specific application scenario and a network environment. In this embodiment, the performance parameter of the optical fiber link is obtained and used as whether to trigger the start of the optical network protection, so that the requirement of the carrier on the attention of the optical network performance can be met, and more comprehensive and reliable optical network protection can be provided.
Example two:
the embodiment provides a network management server, which is shown in fig. 4, and includes an optical network protection control device 1, where the optical network protection control device 1 may obtain a performance parameter of an optical fiber link and use the performance parameter as whether to trigger the start of optical network protection, so as to provide more comprehensive and reliable optical network protection. Referring to fig. 5, the optical network protection and control apparatus 1 in the present embodiment includes:
the performance parameter obtaining module 11 is configured to obtain a performance parameter of an optical fiber link through a performance monitoring module that is disposed on the optical fiber link of the optical network. When the output end of the performance monitoring module in this embodiment is disposed on the optical fiber link, the output end of the performance monitoring module may be coupled to the output end of the amplifier on the optical fiber link. The optical fiber link performance parameter includes at least one of an optical fiber performance parameter and an optical signal transmission performance parameter.
And the protection control module 12 is configured to start optical network protection when it is determined that the optical network needs to be protected according to the acquired optical fiber link performance parameter.
The optical network Protection in this embodiment may adopt at least one of Automatic Power Reduction (APR) Protection and Automatic Protection Switching (APS). What protection methods are used in particular can be flexibly set according to specific application scenarios, and it should be understood that the protection methods are not limited to the above protection methods.
In this embodiment, the performance parameter obtaining module 11 may specifically include an optical fiber performance parameter unit, configured to obtain optical fiber performance parameters, where the obtained optical fiber performance parameters include: at least one of reflection and reflection point performance parameters, total attenuation parameters and attenuation coefficients; the protection control module 12 in this embodiment is specifically configured to:
when the optical fiber performance parameters comprise reflection and reflection point performance parameters, judging whether the obtained reflection and reflection point performance parameters are larger than a preset maximum reflection and reflection point performance parameter threshold value or not, if so, judging that the optical network needs to be protected; otherwise, indicating that the performance parameters of the obtained reflection and reflection points are normal; the reflection-and-reflection point performance parameter in this embodiment includes, but is not limited to, at least one of a reflection power, a reflection coefficient, and an emission point, and the corresponding maximum reflection-and-reflection point performance parameter threshold includes, but is not limited to, at least one of a maximum reflection power threshold, a maximum reflection coefficient threshold, and a maximum emission point threshold. When the reflection and reflection point performance parameters include more than two of the three parameters, it may be determined that the optical network needs to be protected as long as any one of the parameters is greater than the corresponding threshold, or it may be determined that the optical network needs to be protected only when all the parameters are greater than the corresponding thresholds.
The protection control module 12 is configured to, when the optical fiber performance parameter includes a total attenuation parameter, determine whether the obtained total attenuation parameter is greater than a preset maximum total attenuation parameter threshold, and if so, determine that the optical network needs to be protected; otherwise, the acquired total attenuation parameter is indicated to be normal.
The protection control module 12 is configured to, when the optical fiber performance parameter includes an attenuation coefficient, determine whether the obtained attenuation coefficient is greater than a preset maximum attenuation coefficient threshold, if so, determine that the optical network needs to be protected, otherwise, indicate that the obtained attenuation coefficient is normal.
When the performance parameters of the optical fiber link include the performance parameters of the optical fiber, the optical network protection may adopt power auto-reduction protection and auto-switching protection.
The optical fiber performance parameters in this embodiment may also include attenuation and attenuation point parameters, the obtained parameters may not be used as conditions for optical network protection triggering, and after the parameters are detected, the parameters may be reported to a corresponding gateway server for subsequent other analysis and management.
In this embodiment, it may also be determined whether power auto-reduction protection or auto-switching protection needs to be performed on the optical network according to the optical signal transmission performance parameter. Therefore, the performance parameter acquiring module 11 in this embodiment may further include an optical signal transmission performance parameter acquiring unit, configured to acquire an optical signal transmission performance parameter; the optical signal transmission performance parameter comprises at least one of total optical power and optical signal-to-noise ratio;
when the optical network protection includes power automatic reduction protection, the protection control module 12 is configured to:
when the optical signal transmission performance parameters comprise the total optical power, judging whether the obtained total optical power is smaller than a preset minimum optical power threshold value, if so, judging that automatic power reduction protection needs to be carried out on the optical network; otherwise, the obtained total optical power is normal;
and when the optical signal transmission performance parameters comprise the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, if so, judging that the optical network needs to be subjected to power automatic reduction protection, otherwise, indicating that the obtained total optical power is normal.
The optical signal transmission performance parameters in this embodiment may further include center wavelength offset and gain flatness, but the obtained center wavelength offset and gain flatness may be used as a condition for not triggering power automatic reduction protection.
The performance parameter obtaining module 11 further includes an optical multiplexing section transmission performance parameter obtaining unit, configured to obtain an optical signal transmission performance parameter of the optical multiplexing section, where the optical signal transmission performance parameter includes at least one of total optical power, gain flatness, and optical signal-to-noise ratio; when the optical network protection includes the automatic switching protection, the protection control module 12 is configured to:
when the optical signal transmission performance parameter includes the total optical power, judging whether the obtained total optical power is larger than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic switching protection; otherwise, the obtained total optical power is normal;
when the optical signal transmission performance parameters comprise gain flatness, judging whether the obtained gain flatness reaches a preset maximum gain flatness threshold value, if so, judging that the optical network needs to be subjected to automatic switching protection; indicating that the obtained gain flatness is normal;
and when the optical signal transmission performance parameters comprise the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, if so, judging that the optical network needs to be automatically switched and protected, otherwise, indicating that the obtained optical signal-to-noise ratio is normal.
The optical signal transmission performance parameter in this embodiment may further include a center wavelength offset, but the obtained center wavelength offset is used as a condition for not triggering the automatic switching protection of the optical multiplexing section.
The performance parameter acquiring module 11 in this embodiment further includes an optical channel segment transmission performance parameter acquiring unit, configured to acquire an optical signal transmission performance parameter of the optical channel segment, where the optical signal transmission performance parameter includes at least one of center wavelength offset, total optical power, and optical signal-to-noise ratio; at this time, the optical network protection includes automatic switching protection, and the protection control module 12 is further configured to:
when the optical signal transmission performance parameter includes the center wavelength offset, judging whether the acquired center wavelength offset is within a preset center wavelength offset threshold range, if so, judging that the optical network needs to be subjected to automatic switching protection; otherwise, the obtained central wavelength deviation is normal;
when the optical signal transmission performance parameter includes the total optical power, judging whether the obtained total optical power is greater than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic switching protection; otherwise, the obtained total optical power is normal;
when the optical signal transmission performance parameters comprise the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, if so, judging that the automatic switching protection needs to be carried out on the optical network, otherwise, indicating that the obtained optical signal-to-noise ratio is normal.
The optical signal transmission performance parameter in this embodiment may further include gain flatness, but the obtained gain flatness is used as a condition for not triggering automatic switching protection of the optical channel segment.
The specific values of the thresholds in this embodiment can be flexibly set according to factors or requirements such as specific application scenarios and network environments. In this embodiment, the performance parameter of the optical fiber link is obtained and used as whether to trigger the start of the optical network protection, so that the requirement of the carrier on the attention of the optical network performance can be met, and more comprehensive and reliable optical network protection can be provided.
It is obvious to those skilled in the art that the functions of the above modules of the present embodiment can be implemented by a controller or a processor of a network management server, that is, the modules or steps of the above embodiments can be implemented by a general-purpose computing device, they can be centralized on a single computing device or distributed on a network composed of a plurality of computing devices, alternatively, they can be implemented by program codes executable by the computing device, so that they can be stored in a computer storage medium (ROM/RAM, magnetic disk, optical disk) and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that in the present disclosure, or they can be respectively made into each integrated circuit module, or a plurality of modules or steps in them can be made into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
Example three:
in order to better understand the present invention, the following describes the present invention in two specific application scenarios.
Referring to fig. 6, an optical fiber link added with a performance monitoring module according to an embodiment of the present invention is shown, in which the performance monitoring module integrates OTDR and OPM functions, and an output end of the performance monitoring module is coupled to an output end of an optical fiber amplifier. And physically, the performance monitoring module and the optical fiber amplifier may be integrated together, as shown in fig. 11, or may be disposed separately, and the performance monitoring module and the optical fiber amplifier are used together, as shown in fig. 12.
An "x" between T1 and R2 indicates that a failure has occurred in the section; fiber amplifiers include, but are not limited to, raman Fiber Amplifiers (RFAs), erbium-Doped Fiber amplifiers (EDFAs), praseodymium-Doped Fiber amplifiers (PDFAs), and Niobium-Doped Fiber amplifiers (NDFAs). The parameters that the performance monitoring module can monitor are shown in table 1 below.
TABLE 1
The APR function flowchart in this embodiment at this time is shown in fig. 7, and includes:
s701: acquiring optical fiber link performance parameters through a performance monitoring module arranged on an optical fiber link of an optical network, wherein the acquired parameters comprise parameters shown in the table 1;
s702: judging whether the obtained reflection and reflection point parameters are larger than the maximum reflection and reflection point performance parameter threshold value or not, if not, turning to S703; otherwise, go to S707;
s703: judging whether the obtained total attenuation parameter is greater than the maximum total attenuation parameter threshold value, if not, turning to S704; otherwise, go to S707;
s704: judging whether the obtained attenuation coefficient is larger than the maximum attenuation coefficient threshold value, if not, turning to S705; otherwise, go to S707;
s705: judging whether the obtained total optical power is smaller than the minimum total optical power threshold value, if not, turning to S706; otherwise, go to S707;
s706: judging whether the obtained optical signal-to-noise ratio is smaller than the minimum optical signal-to-noise ratio threshold value, if not, turning to S707; otherwise, go to S701;
s707: and starting an automatic power reduction APR process.
For attenuation and attenuation points: monitoring the attenuation and attenuation point of the optical fiber in real time, and reporting to a network manager without being used as an APR process starting condition;
for center wavelength shift: monitoring the central wavelength deviation of the signal light in real time, reporting to a network manager, not starting an APR process when the central wavelength deviation is not within the threshold range, only generating an alarm, and informing maintenance personnel of removing faults;
for gain flatness: and monitoring the gain flatness of the signal light in real time, reporting to a network manager, generating corresponding action instead of starting an APR process when the gain flatness is greater than a threshold value, and adjusting the gain flatness to restore the gain flatness to normal.
Fig. 8 is a schematic diagram of an optical multiplexing section optical fiber link to which a performance monitoring module according to an embodiment of the present invention is added. Fig. 9 shows a flow chart of APS functions of the optical multiplexing section, which includes:
s901: acquiring optical fiber link performance parameters through a performance monitoring module arranged on an optical fiber link of an optical network, wherein the acquired parameters comprise parameters shown in the table 1;
s902: judging whether the obtained reflection and reflection point parameters are larger than the maximum reflection and reflection point performance parameter threshold value, if not, turning to S903; otherwise, go to S908;
s903: judging whether the obtained total attenuation parameter is larger than the maximum total attenuation parameter threshold value, if not, turning to S904; otherwise, go to S908;
s904: judging whether the obtained attenuation coefficient is larger than the maximum attenuation coefficient threshold value, if not, turning to S905; otherwise, go to S908;
s905: judging whether the obtained total optical power is smaller than the minimum total optical power threshold value, if not, turning to S906; otherwise, go to S908;
s906: judging whether the obtained gain flatness is larger than the maximum gain flatness threshold value or not, if not, turning to S907; otherwise, go to S908;
s907: judging whether the obtained optical signal-to-noise ratio is smaller than a minimum optical signal-to-noise ratio threshold value, if not, turning to S908; otherwise, go to S901;
s908: and starting the APS process.
For attenuation and attenuation points: monitoring the attenuation and attenuation point of the optical fiber in real time, and reporting to a network manager without being used as an APS process starting condition;
for center wavelength shift: and monitoring the central wavelength deviation of the signal light in real time, reporting to a network manager, and generating an alarm to inform maintenance personnel to repair without starting an APS process when the central wavelength deviation is larger than a threshold range.
The novel APS protection process is not only applicable to optical multiplexing segment protection, but also applicable to optical channel segment protection, and the protection process is shown in fig. 10, for example, and includes:
s1001: acquiring optical fiber link performance parameters through a performance monitoring module arranged on an optical fiber link of an optical network, wherein the acquired parameters comprise parameters shown in the table 1;
s1002: judging whether the obtained reflection and reflection point parameters are larger than the maximum reflection and reflection point performance parameter threshold value, if not, turning to S1003; otherwise, go to S1008;
s1003, carrying out: judging whether the obtained total attenuation parameter is larger than the maximum total attenuation parameter threshold value, if not, turning to S1004; otherwise, go to S1008;
s1004: judging whether the obtained attenuation coefficient is larger than the maximum attenuation coefficient threshold value, if not, turning to S1005; otherwise, go to S1008;
s1005: judging whether the obtained total optical power is smaller than a minimum total optical power threshold value, if not, turning to S1006; otherwise, go to S1008;
s1006: judging whether the obtained central wavelength deviation is within a preset threshold model text, if not, turning to S1007; otherwise, go to S1008;
s1007: judging whether the obtained optical signal-to-noise ratio is smaller than a minimum optical signal-to-noise ratio threshold value, if not, turning to S1008; otherwise, go to S1001;
s1008: and starting the APS process.
For attenuation and attenuation points: monitoring the attenuation and attenuation point of the optical fiber in real time, and reporting to a network manager without being used as an APS process starting condition;
for gain flatness: and monitoring the gain flatness of the signal light in real time, reporting to a network manager, generating corresponding action instead of starting an APR process when the gain flatness is greater than a threshold value, and adjusting the gain flatness to restore the gain flatness to normal. In addition, it should be understood that there is no strict time sequence between the determination steps in the above flowchart, and the specific execution sequence can be flexibly set according to a specific scenario.
The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. An optical network protection control method includes:
acquiring optical fiber link performance parameters through a performance monitoring module arranged on an optical fiber link of an optical network, wherein the optical fiber link performance parameters comprise at least one of optical fiber performance parameters and optical signal transmission performance parameters;
when judging that the optical network needs to be protected according to the acquired optical fiber link performance parameters, starting optical network protection, wherein the optical network protection comprises at least one of power automatic reduction protection and automatic switching protection;
the optical fiber link performance parameters comprise optical fiber performance parameters, the optical fiber performance parameters comprise reflection and reflection point performance parameters, and the reflection and reflection point performance parameters comprise at least two of reflection power, reflection coefficient and emission point;
the judging that the optical network needs to be protected according to the acquired optical fiber link performance parameters comprises the following steps:
and judging that the optical network needs to be protected according to at least two of the reflection power greater than the maximum reflection power threshold, the reflection coefficient greater than the maximum reflection coefficient threshold and the emission point greater than the maximum emission point threshold.
2. The method according to claim 1, wherein when the optical fiber link performance parameter comprises an optical fiber performance parameter, the optical fiber performance parameter comprises: at least one of total attenuation parameter and attenuation coefficient;
judging whether the optical network needs to be protected according to the acquired optical fiber link performance parameters comprises the following steps:
when the optical fiber performance parameters comprise total attenuation parameters, judging whether the obtained total attenuation parameters are larger than a preset maximum total attenuation parameter threshold value, if so, judging that the optical network needs to be protected;
and when the optical fiber performance parameters comprise attenuation coefficients, judging whether the obtained attenuation coefficients are larger than a preset maximum attenuation coefficient threshold value, if so, judging that the optical network needs to be protected.
3. The optical network protection control method according to claim 1 or 2, wherein when the optical network protection includes power automatic reduction protection and the optical fiber link performance parameter includes an optical signal transmission performance parameter, the optical signal transmission performance parameter includes at least one of total optical power and optical signal-to-noise ratio;
judging whether the optical network needs to be protected according to the acquired optical fiber link performance parameters comprises the following steps:
when the optical signal transmission performance parameters comprise total optical power, judging whether the obtained total optical power is smaller than a preset minimum optical power threshold value, if so, judging that automatic power reduction protection needs to be carried out on the optical network;
and when the optical signal transmission performance parameters comprise the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, and if so, judging that the optical network needs to be subjected to power automatic reduction protection.
4. The optical network protection control method according to claim 1 or 2, wherein when the optical network protection includes automatic switching protection and the optical fiber link performance parameter includes an optical signal transmission performance parameter of an optical multiplexing section, the optical signal transmission performance parameter includes at least one of total optical power, gain flatness, and optical signal-to-noise ratio;
judging whether the optical network needs to be protected according to the acquired optical fiber link performance parameters comprises the following steps:
when the optical signal transmission performance parameter includes total optical power, judging whether the obtained total optical power is greater than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic power switching protection;
when the optical signal transmission performance parameters comprise gain flatness, judging whether the obtained gain flatness reaches a preset maximum gain flatness threshold value, if so, judging that the optical network needs to be subjected to automatic power switching protection;
and when the optical signal transmission performance parameter comprises an optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, and if so, judging that the optical network needs to be subjected to automatic switching protection.
5. The optical network protection control method according to claim 1 or 2, wherein when the optical network protection includes automatic switching protection and the optical fiber link performance parameter includes an optical signal transmission performance parameter of an optical channel segment, the optical signal transmission performance parameter includes at least one of a center wavelength offset, a total optical power, and an optical signal-to-noise ratio;
judging whether the optical network needs to be protected according to the acquired optical fiber link performance parameters comprises the following steps:
when the optical signal transmission performance parameters include center wavelength offset, judging whether the obtained center wavelength offset is within a preset center wavelength offset threshold range, if so, judging that the optical network needs to be subjected to automatic power switching protection;
when the optical signal transmission performance parameter includes total optical power, judging whether the obtained total optical power is greater than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic power switching protection;
and when the optical signal transmission performance parameter comprises an optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, and if so, judging that the optical network needs to be subjected to automatic switching protection.
6. An optical network protection control device comprising:
a performance parameter obtaining module, configured to obtain a performance parameter of an optical fiber link through a performance monitoring module arranged on the optical fiber link of the optical network, where the performance parameter of the optical fiber link includes at least one of an optical fiber performance parameter and an optical signal transmission performance parameter;
the protection control module is used for starting optical network protection when judging that the optical network needs to be protected according to the acquired optical fiber link performance parameters, wherein the optical network protection comprises at least one of power automatic reduction protection and automatic switching protection;
the optical fiber link performance parameters comprise optical fiber performance parameters, the optical fiber performance parameters comprise reflection and reflection point performance parameters, and the reflection and reflection point performance parameters comprise at least two of reflection power, reflection coefficient and emission point;
the judging that the optical network needs to be protected according to the acquired optical fiber link performance parameters comprises the following steps:
and judging that the optical network needs to be protected according to at least two of the reflection power greater than the maximum reflection power threshold, the reflection coefficient greater than the maximum reflection coefficient threshold and the emission point greater than the maximum emission point threshold.
7. The optical network protection control device according to claim 6, wherein the performance parameter obtaining module comprises an optical fiber performance parameter unit, configured to obtain optical fiber performance parameters, where the optical fiber performance parameters include: at least one of total attenuation parameter and attenuation coefficient;
the protection control module is used for:
when the optical fiber performance parameters comprise total attenuation parameters, judging whether the obtained total attenuation parameters are larger than a preset maximum total attenuation parameter threshold value, if so, judging that the optical network needs to be protected;
and when the optical fiber performance parameters comprise attenuation coefficients, judging whether the obtained attenuation coefficients are larger than a preset maximum attenuation coefficient threshold value, if so, judging that the optical network needs to be protected.
8. The optical network protection control device according to claim 6 or 7, wherein the performance parameter obtaining module comprises an optical signal transmission performance parameter obtaining unit, configured to obtain an optical signal transmission performance parameter; the optical signal transmission performance parameter comprises at least one of total optical power and optical signal-to-noise ratio;
the optical network protection comprises power automatic reduction protection, and the protection control module is used for:
when the optical signal transmission performance parameters comprise total optical power, judging whether the obtained total optical power is smaller than a preset minimum optical power threshold value, if so, judging that automatic power reduction protection needs to be carried out on the optical network;
and when the optical signal transmission performance parameters comprise the optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, and if so, judging that the optical network needs to be subjected to power automatic reduction protection.
9. The optical network protection control device according to claim 6 or 7, wherein the performance parameter obtaining module includes an optical multiplexing section transmission performance parameter obtaining unit, configured to obtain an optical signal transmission performance parameter of an optical multiplexing section, where the optical signal transmission performance parameter includes at least one of total optical power, gain flatness, and optical signal-to-noise ratio;
the optical network protection comprises automatic switching protection, and the protection control module is used for:
when the optical signal transmission performance parameter includes total optical power, judging whether the obtained total optical power is greater than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic power switching protection;
when the optical signal transmission performance parameters comprise gain flatness, judging whether the obtained gain flatness reaches a preset maximum gain flatness threshold value, if so, judging that the optical network needs to be subjected to automatic power switching protection;
and when the optical signal transmission performance parameter comprises an optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, and if so, judging that the optical network needs to be subjected to automatic switching protection.
10. The optical network protection control device according to claim 6 or 7, wherein the performance parameter obtaining module includes an optical channel segment transmission performance parameter obtaining unit, configured to obtain an optical signal transmission performance parameter of an optical channel segment, where the optical signal transmission performance parameter includes at least one of a center wavelength offset, a total optical power, and an optical signal-to-noise ratio;
the optical network protection comprises automatic switching protection, and the protection control module is used for:
when the optical signal transmission performance parameter includes center wavelength offset, judging whether the acquired center wavelength offset is within a preset center wavelength offset threshold range, if so, judging that the optical network needs to be subjected to automatic power switching protection;
when the optical signal transmission performance parameter includes total optical power, judging whether the obtained total optical power is greater than a preset maximum optical power threshold value, if so, judging that the optical network needs to be subjected to automatic power switching protection;
and when the optical signal transmission performance parameter comprises an optical signal-to-noise ratio, judging whether the obtained optical signal-to-noise ratio is smaller than a preset minimum optical signal-to-noise ratio value, and if so, judging that the optical network needs to be subjected to automatic switching protection.
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