CN115276794A - Optical fiber link switching method, device, network management equipment and storage medium - Google Patents
Optical fiber link switching method, device, network management equipment and storage medium Download PDFInfo
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- CN115276794A CN115276794A CN202211179282.7A CN202211179282A CN115276794A CN 115276794 A CN115276794 A CN 115276794A CN 202211179282 A CN202211179282 A CN 202211179282A CN 115276794 A CN115276794 A CN 115276794A
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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
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
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Abstract
The application belongs to the field of forward-transmission semi-active wavelength division systems, and provides an optical fiber link switching method, an optical fiber link switching device, network management equipment and a storage medium, wherein under the condition that an optical switch works in a main optical fiber link, the optical power of all uplink optical fiber links and the uplink optical power of a standby optical fiber link are obtained; calculating the uplink optical power of the main optical fiber link according to the optical power of all the uplink optical fiber links; under the condition that the optical switch works in the standby optical fiber link, acquiring the uplink optical power of the main optical fiber link and the optical power of all uplink optical fiber links; the uplink optical power of the standby optical fiber link is calculated according to the optical power of all the uplink optical fiber links, and the optical power of the uplink direction in each optical fiber link when the optical switch works in different optical fiber links can be accurately measured; and determining whether to switch the working link of the optical switch according to the uplink optical power of the primary optical fiber link and the standby optical fiber link, so that the optical fiber link can be protected.
Description
Technical Field
The present application relates to the field of forward-transmission semi-active wavelength division systems, and in particular, to a method and an apparatus for switching an optical fiber link, a network management device, and a storage medium.
Background
The forward-transmission semi-Active wavelength division system uses passive wavelength division equipment at the Radio Remote Unit (RRU) or the Active Antenna Unit (AAU) side of a Base station, and uses passive wavelength division equipment at the baseband processing Unit (BBU) or the Distributed Unit (DU) side of a Base station controller. The passive wavelength division equipment comprises a passive wavelength division multiplexer and a coupler, the active wavelength division equipment comprises an optical switch and the passive wavelength division multiplexer, and the coupler and the optical switch are connected through optical fiber links of the main route and the standby route respectively.
Because the forward-transmission semi-active wavelength division system is a single-fiber bidirectional wavelength division multiplexing system, when the optical fiber link is switched, the optical power in the uplink direction (from the AAU to the DU) needs to be accurately measured, but the optical power in the uplink direction is affected by the optical signal in the downlink direction (from the DU to the AAU), which causes the measured optical power in the uplink direction to be inaccurate, and thus, the optical fiber link is switched by mistake or is not switched under the condition that the optical signal in the optical fiber link is interrupted.
Disclosure of Invention
In view of this, embodiments of the present application provide an optical fiber link switching method and apparatus, a network management device, and a storage medium, which are intended to solve the problem that, in an existing forward-transmission semi-active wavelength division system, an optical fiber link is switched erroneously or is not switched easily when an optical signal in the optical fiber link is interrupted.
A first aspect of the embodiments of the present application provides an optical fiber link switching method, which is applied to a forward-transmission semi-active wavelength division system, where the forward-transmission semi-active wavelength division system includes a passive wavelength division device, an active wavelength division device, a main optical splitter, a main optical detector, a backup optical splitter, a backup optical detector, and a plurality of uplink optical detection units, the passive wavelength division device includes a passive wavelength division multiplexer and a coupler, and the active wavelength division device includes an optical switch and an active wavelength division multiplexer;
the path combining end of the passive wavelength division multiplexer is connected with the first end of the coupler, the second end of the coupler is connected with the first end of the primary optical splitter through a primary optical fiber link, and the third end of the coupler is connected with the first end of the standby optical splitter through a standby optical fiber link;
the second end and the third end of the main optical splitter are respectively connected with the first end of the optical switch and the main optical detector in a one-to-one correspondence manner, the second end and the third end of the standby optical splitter are respectively connected with the second end of the optical switch and the standby optical detector in a one-to-one correspondence manner, the third end of the optical switch is connected with the combining end of the active wavelength division multiplexer, and each uplink optical detection unit is respectively connected with one uplink branching end and one uplink optical fiber link of the active wavelength division multiplexer in a corresponding manner;
the optical fiber link switching method comprises the following steps:
if the optical switch works in the primary optical fiber link, acquiring the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit, and acquiring the uplink optical power of the standby optical fiber link based on the standby optical detector;
calculating the uplink optical power of the main optical fiber link according to the optical power of all the uplink optical fiber links;
if the optical switch works in the standby optical fiber link, acquiring the uplink optical power of the primary optical fiber link based on the primary optical detector, and acquiring the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit;
calculating the uplink optical power of the standby optical fiber link according to the optical power of all the uplink optical fiber links;
and determining whether to switch the working link of the optical switch according to the uplink optical power of the main optical fiber link and the uplink optical power of the standby optical fiber link.
A second aspect of the embodiments of the present application provides an optical fiber link switching apparatus, which is applied to a forward-transmission semi-active wavelength division system, where the forward-transmission semi-active wavelength division system includes a passive wavelength division device, an active wavelength division device, a main optical splitter, a main optical detector, a backup optical splitter, a backup optical detector, and a plurality of uplink optical detection units, the passive wavelength division device includes a passive wavelength division multiplexer and a coupler, and the active wavelength division device includes an optical switch and an active wavelength division multiplexer;
the path combining end of the passive wavelength division multiplexer is connected with the first end of the coupler, the second end of the coupler is connected with the first end of the primary optical splitter through a primary optical fiber link, and the third end of the coupler is connected with the first end of the standby optical splitter through a standby optical fiber link;
the second end and the third end of the main optical splitter are respectively connected with the first end of the optical switch and the main optical detector in a one-to-one correspondence manner, the second end and the third end of the standby optical splitter are respectively connected with the second end of the optical switch and the standby optical detector in a one-to-one correspondence manner, the third end of the optical switch is connected with the combining end of the active wavelength division multiplexer, and each uplink optical detection unit is respectively connected with one uplink branching end and one uplink optical fiber link of the active wavelength division multiplexer in a corresponding manner;
the optical fiber link switching device comprises:
a first uplink optical power obtaining unit, configured to obtain, if the optical switch operates in the primary optical fiber link, optical power of a corresponding uplink optical fiber link based on each uplink optical detection unit, and obtain, based on the standby optical detector, uplink optical power of the standby optical fiber link;
a first uplink optical power calculating unit, configured to calculate uplink optical power of the primary optical fiber link according to optical powers of all the uplink optical fiber links;
a second uplink optical power obtaining unit, configured to obtain, if the optical switch operates in the standby optical fiber link, the uplink optical power of the primary optical fiber link based on the primary optical detector, and obtain, based on each uplink optical detection unit, the optical power of the corresponding uplink optical fiber link;
a second uplink optical power calculating unit, configured to calculate uplink optical power of the spare optical fiber link according to optical powers of all the uplink optical fiber links;
and the optical fiber link switching unit is used for determining whether to switch the working link of the optical switch according to the uplink optical power of the primary optical fiber link and the uplink optical power of the standby optical fiber link.
A third aspect of the embodiments of the present application provides a network management device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the optical fiber link switching method provided in the first aspect of the embodiments of the present application when executing the computer program.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the optical fiber link switching method provided by the first aspect of the embodiments of the present application.
The optical fiber link switching method provided by the first aspect of the embodiment of the present application is applied to a forward-transmission semi-active wavelength division system, and is characterized in that a primary optical splitter is arranged between a primary optical fiber link and a first end of an optical switch, a backup optical splitter is arranged between a backup optical fiber link and a second end of the optical switch, an uplink optical detection unit is arranged between each uplink splitter end of the active wavelength division multiplexer and one uplink optical fiber link, a part of optical signals are branched from the primary optical fiber link to a primary optical detector through the primary optical splitter, and a part of optical signals are branched from the backup optical fiber link to a backup optical detector through the backup optical splitter; based on the structure of the forward-transmission semi-active wavelength division system, under the condition that the optical switch works in the main optical fiber link, the optical power of the corresponding uplink optical fiber link is obtained based on each uplink optical detection unit, and the uplink optical power of the standby optical fiber link is obtained based on the standby optical detector; then, calculating the uplink optical power of the main optical fiber link according to the optical power of all the uplink optical fiber links; under the condition that the optical switch works in the standby optical fiber link, acquiring the uplink optical power of the main optical fiber link based on the main optical detector, and acquiring the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit; then, according to the optical power of all the uplink optical fiber links, the uplink optical power of the standby optical fiber link is calculated, and the optical power of each link in the uplink direction when the optical switch works in different optical fiber links can be accurately measured; and finally, determining whether to switch the working link of the optical switch according to the uplink optical power of the main optical fiber link and the uplink optical power of the standby optical fiber link, so that the optical fiber link can be protected, and the working link of the optical switch is prevented from being switched by mistake or not under the condition that the optical signal in the optical fiber link is interrupted.
It is understood that the beneficial effects of the second to fourth aspects can be referred to the related description of the first aspect, and are not described herein again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to calculate other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a forwarding semi-active wavelength division system provided in an embodiment of the present application;
fig. 2 is a first flowchart of a method for switching an optical fiber link according to an embodiment of the present application;
fig. 3 is a relationship between a current link of an optical switch, an uplink optical power of a primary optical fiber link, a first threshold, an uplink optical power of a standby optical fiber link, a second threshold, and a switching state of an operating link of the optical switch according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an optical fiber link switching device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a network management device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Furthermore, in the description of the present invention and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise. The term "plurality" and variations thereof mean "more than two".
As shown in fig. 1, an embodiment of the present application provides a forward-transmission semi-active wavelength division system, which includes a passive wavelength division device 1, an active wavelength division device 2, a primary Optical splitter 3, a primary Optical detector 4, a backup Optical splitter 5, a backup Optical detector 6, a plurality of uplink Optical detection units 7, and a plurality of downlink Optical detection units 8, where the passive wavelength division device 1 includes a passive wavelength division multiplexer 11 and an Optical Coupler (OC) 12, and the active wavelength division device 2 includes an Optical switch 21 and an active wavelength division multiplexer 22.
The connection relationship among all the components in the forward transmission semi-active wavelength division system is as follows:
the combining end of the passive wavelength division multiplexer 11 is connected with the first end of the optical coupler 12, the second end of the optical coupler 12 is connected with the first end of the primary optical splitter 3 through the primary optical fiber link 101, and the third end of the optical coupler 12 is connected with the first end of the backup optical splitter 5 through the backup optical fiber link 102;
the second end and the third end of the primary optical splitter 3 are respectively connected with the first end of the optical switch 21 and the primary optical detector 4 in a one-to-one correspondence manner, the second end and the third end of the backup optical splitter 5 are respectively connected with the second end of the optical switch 21 and the backup optical detector 6 in a one-to-one correspondence manner, the third end of the optical switch 21 is connected with the combining end of the active wavelength division multiplexer 22, each uplink optical detection unit 7 is respectively connected with one uplink branching end and one uplink optical fiber link 103 of the active wavelength division multiplexer 22, and each downlink optical detection unit 8 is respectively connected with one downlink branching end and one downlink optical fiber link 104 of the active wavelength division multiplexer 22.
In application, the fronthaul semi-active wavelength division system may be a 4/5G fronthaul semi-active wavelength division system applied to a fourth/fifth Generation Mobile Communication technology (4/5G) network.
In application, the primary Optical splitter is an Optical splitter (OPS/TAP) connected to the primary Optical fiber link, and the backup Optical splitter is an Optical splitter connected to the backup Optical fiber link. The active optical detector is an optical detector for measuring optical power of the active optical fiber link, the standby optical detector is an optical detector for measuring optical power of the standby optical fiber link, and the optical detector may be implemented by any device having a photoelectric conversion function, such as a Photodiode (PD).
In application, the uplink optical detection unit is used for measuring the optical power of each uplink optical fiber link of the active wavelength division multiplexer; similarly, the downlink optical detection unit is used for measuring the optical power of each downlink optical fiber link of the active wavelength division multiplexer. The light detection unit may be implemented by a TAP-PD (TAP-PD), or an optical splitter in combination with a light detector. Fig. 1 schematically shows a first structure of an uplink optical detection unit and a downlink optical detection unit, where the uplink optical detection unit 7 is an uplink spectral detector, and the downlink optical detection unit 8 is a downlink spectral detector.
In one embodiment, the uplink optical detection unit and the downlink optical detection unit may also adopt a second structure, where the uplink optical detection unit includes an uplink optical splitter and an uplink optical detector, and the downlink optical detection unit includes an uplink optical splitter and an uplink optical detector;
the first end, the second end and the third end of each uplink optical splitter are respectively and correspondingly connected with an uplink splitter end, an uplink optical fiber link and an uplink optical detector;
the first end, the second end and the third end of each downlink optical splitter are correspondingly connected with a downlink splitter end, a downlink optical fiber link and a downlink optical detector respectively.
In application, the passive Wavelength Division Multiplexer is a Wavelength Division Multiplexer (WDM) of the passive Wavelength Division device, and the active Wavelength Division Multiplexer is a Wavelength Division Multiplexer of the active Wavelength Division device, and the Wavelength Division Multiplexer may be a Coarse Wavelength Division Multiplexer (CWDM), a fine Wavelength Division Multiplexer (LWDM), a Medium Wavelength Division Multiplexer (MWDM), or a Dense Wavelength Division Multiplexer (DWDM), and may be selected according to actual needs.
In application, an optical splitter and an optical detector with a suitable splitting ratio can be selected according to actual needs, for example, 98: 2. 99:1, etc. to make the light energy of the optical splitter or the optical detector used for measuring the light power far less than the light energy used for optical communication transmitted on the optical fiber link, thereby avoiding the influence on the optical communication quality.
In application, the optical coupler is equivalent to a splitting ratio of 1:2, an optical splitter may be used instead.
As shown in fig. 1, based on that the optical power measured by the active optical detector is the sum of the uplink optical power PDx (AAU- > DU) and the downlink optical power PDx (DU- > AAU) of the active optical fiber link, when the optical switch operates in the active optical fiber link (that is, when the optical path between the first end and the third end of the optical switch is conducted), in order to protect the optical fiber link, the uplink optical power PDx (AAU- > DU) in the P1 direction needs to be accurately measured;
based on that the optical power measured by the standby optical detector is the sum of the uplink optical power PDy (AAU- > DU) and the downlink optical power PDy (DU- > AAU) of the standby optical fiber link, when the optical switch operates in the standby optical fiber link (that is, when the optical path between the second end and the third end of the optical switch is conducted), in order to protect the optical fiber link, the uplink optical power PDy (AAU- > DU) in the P2 direction needs to be accurately measured;
under the condition that the optical switch works on the primary optical fiber link, the primary optical splitter with the non-uniform optical ratio divides an uplink optical signal of the primary optical fiber link into two paths, most of the uplink optical signal is divided to a first end of the optical switch, and at least part of the uplink optical signal is divided to a primary optical detector;
under the condition that the optical switch works in the standby optical fiber link, the standby optical splitter with the non-uniform optical splitting ratio divides the uplink optical signals of the standby optical fiber link into two paths, most of the uplink optical signals are divided to the second end of the optical switch, and at least part of the uplink optical signals are divided to the standby optical detector;
because the optical fiber link generally adopts a Lucent Connector (LC) or a super Physical Contact (UPC) interface, the reflection loss of this type of interface in the air is approximately 14dB, and the general optical splitter has an isolation of 50dB, when the optical switch normally works in the main optical fiber link, the influence of the downlink optical signal in the P3 direction on the optical power of the main optical detector is very weak, and when the optical switch normally works in the standby optical fiber link, the influence of the downlink optical signal in the P3 direction on the optical power of the standby optical detector is very weak and can be almost ignored. However, due to the reflection loss of the LC interface or the UPC interface, when the optical switch operates in the primary optical fiber link, if the primary optical fiber link is abnormal (e.g., interrupted), the optical power of the optical signal in the P4 direction is greatly affected by the downlink optical signal in the P3 direction, which results in that the optical power measured by the primary optical detector is still greater than the preset first threshold value, so that the network management device does not trigger the optical switch to switch the operating link to the standby optical fiber link; similarly, when the optical switch operates in the standby optical fiber link, when the standby optical fiber link is abnormal, the downlink optical signal in the P3 direction has a large influence on the optical power of the optical signal in the P5 direction, so that the optical power measured based on the standby optical detector is still greater than the preset second threshold value, and the network management device does not trigger the optical switch to switch the operating link to the main optical fiber link, and the optical fiber link cannot be protected.
In application, the optical power measured by the primary optical detector is smaller than a first threshold value to indicate that the primary optical fiber link is abnormal, and the optical power measured by the standby optical detector is smaller than a second threshold value to indicate that the standby optical fiber link is abnormal. The first threshold and the second threshold may be set according to actual needs, for example, the first threshold is set as the uplink optical power of the primary optical fiber link when the optical switch operates in the primary optical fiber link and the primary optical fiber link is normal; the second threshold is set as an uplink optical power of the backup optical fiber link when the optical switch operates in the backup optical fiber link and the backup optical fiber link is normal.
Based on the fronthaul semi-active wavelength division system, the embodiment of the present application provides an optical fiber link switching method, which may be executed when a processor of a network management device of the fronthaul semi-active wavelength division system runs a computer program with a corresponding function, and may accurately measure an optical power in an uplink direction in each link when an optical switch operates in different optical fiber links, so as to implement protection on the optical fiber links and avoid mistakenly switching or not switching a working link of the optical switch under a condition that an optical signal in the optical fiber link is interrupted.
As shown in fig. 2, the optical fiber link switching method provided in the embodiment of the present application includes the following steps S101 to S105:
step S101, if the optical switch works in the primary optical fiber link, acquiring the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit, acquiring the uplink optical power of the standby optical fiber link based on the standby optical detector, and entering step S102;
step S102, calculating the uplink optical power of the primary optical fiber link according to the optical power of all the uplink optical fiber links, and entering step S105;
step S103, if the optical switch works in the standby optical fiber link, acquiring the uplink optical power of the main optical fiber link based on the main optical detector, acquiring the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit, and entering step S104;
step S104, calculating the uplink optical power of the standby optical fiber link according to the optical power of all the uplink optical fiber links, and entering step S105;
step S105, determining whether to switch the working link of the optical switch according to the uplink optical power of the primary optical fiber link and the uplink optical power of the standby optical fiber link.
In application, when the optical switch operates in the primary optical fiber link, in order to avoid a large influence of a downlink optical signal in a P3 direction on optical power of an optical signal in a P4 direction, which results in inaccurate optical power measured by the primary optical detector, optical power of an uplink optical fiber link correspondingly connected to each uplink optical detector may be first obtained by each uplink optical detection unit, and then uplink optical power of the primary optical fiber link is calculated according to the optical power of all the uplink optical fiber links. In addition, since the optical path between the first end and the third end of the optical switch is disconnected, the optical power of the optical signal in the P5 direction is not affected by the downlink optical signal in the P3 direction, and therefore, the uplink optical power of the optical fiber link can be accurately obtained directly based on the standby optical detector.
In application, when the optical switch operates in the backup optical fiber link, in order to avoid that the optical power of the optical signal in the P5 direction is not accurate due to a large influence of the downlink optical signal in the P3 direction on the optical power of the optical signal in the P5 direction, the optical power of one uplink optical fiber link correspondingly connected to each uplink optical detection unit may be first obtained through each uplink optical detection unit, and then the uplink optical power of the backup optical fiber link is calculated according to the optical powers of all the uplink optical fiber links. In addition, since the optical path between the first end and the second end of the optical switch is disconnected, the optical power of the optical signal in the P4 direction is not affected by the downlink optical signal in the P3 direction, and therefore, the uplink optical power of the primary optical fiber link can be directly acquired based on the primary optical detector.
In one embodiment, the acquiring the uplink optical power of the backup optical fiber link based on the backup optical detector in step S101 includes:
calculating the ratio of the optical power acquired by the standby optical detector to the light splitting ratio of the third end of the standby optical splitter to obtain the uplink optical power of the standby optical fiber link;
in step S103, acquiring the uplink optical power of the primary optical fiber link based on the primary optical detector includes:
and calculating the ratio of the optical power acquired by the main optical detector to the light splitting ratio of the third end of the main optical splitter to obtain the uplink optical power of the main optical fiber link.
In application, since the standby optical detector measures the uplink optical power of the standby optical fiber link by using only a part of optical signals in the standby optical fiber link, the uplink optical power of the standby optical fiber link is substantially equal to a ratio between the optical power collected by the standby optical detector and a splitting ratio of the third end of the standby optical detector, and the splitting ratio of the standby optical detector is 98: when 2, the light splitting ratio of the third end is 2%, and the light splitting ratio of the standby light detector is 99: when 1, the light splitting ratio of the third end is 1%; similarly, since the primary optical detector measures the uplink optical power of the primary optical fiber link by using only a part of optical signals in the primary optical fiber link, the uplink optical power of the primary optical fiber link is substantially equal to a ratio between the optical power collected by the primary optical detector and the splitting ratio of the third end of the primary optical detector, and the splitting ratio of the primary optical detector is 98: when 2, the light splitting ratio of the third end is 2%, and the light splitting ratio of the main light detector is 99: the light splitting ratio of the third end is 1%.
In one embodiment, based on the first structure of the uplink optical probe unit, the acquiring optical power of the corresponding uplink optical fiber link based on each uplink optical probe unit in steps S101 and S103 includes:
calculating the ratio of the optical power collected by each uplink light splitting detector to the light splitting ratio of the third end of the uplink light splitting detector to obtain the optical power of the corresponding uplink optical fiber link;
alternatively, based on the second structure of the uplink optical detection unit, the acquiring, in steps S101 and S103, the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit includes:
and calculating the ratio of the optical power collected by each uplink optical detector to the light splitting ratio of the third end of the uplink optical splitter to obtain the optical power of the corresponding uplink optical fiber link.
In the first structure of the uplink optical detection unit, since the uplink optical splitter only uses a part of optical signals in the uplink optical fiber link to measure the optical power of the uplink optical fiber link, the optical power of the uplink optical fiber link is substantially equal to the ratio between the optical power collected by the uplink optical splitter and the splitting ratio of the third end of the uplink optical splitter, and the splitting ratio of the uplink optical splitter is 98: when 2, the light splitting ratio of the third end is 2%, and the light splitting ratio of the uplink light splitting detector is 99: when 1, the light splitting ratio of the third end is 1%; similarly, based on the second structure of the uplink optical detection unit, the optical power of the uplink optical fiber link is substantially equal to the ratio between the optical power collected by the uplink optical detector and the splitting ratio of the third end of the corresponding uplink optical splitter, and the splitting ratio of the uplink optical splitter is 98: when 2, the light splitting ratio of the third end is 2%, and the light splitting ratio of the uplink optical splitter is 99: the light splitting ratio of the third end is 1%.
In one embodiment, step S102 includes:
calculating the sum of the optical power of all uplink optical fiber links, the insertion loss of the active wavelength division multiplexer and the insertion loss of the optical switch to obtain the uplink optical power of the primary optical fiber link;
step S104, comprising:
and calculating the sum of the optical power of all the uplink optical fiber links, the insertion loss of the active wavelength division multiplexer and the insertion loss of the optical switch to obtain the uplink optical power of the standby optical fiber link.
In application, if a ratio between optical power collected by the primary optical detector and a light splitting ratio of the third end of the standby optical detector is PDx, a ratio between optical power collected by the standby optical detector and a light splitting ratio of the third end of the standby optical detector is PDy, optical powers of all uplink optical fiber links are PD1, PD2, \8230;, and PDm, an insertion loss of the active wavelength division multiplexer is IL1, an insertion loss of the optical switch is IL2, m is greater than or equal to 1, and m is an integer, then:
under the condition that the optical switch works in the main optical fiber link, the uplink optical power PDx (AAU- > DU) = PD1+ PD2+ \ 8230of the main optical fiber link, the uplink optical power PDm + IL1+ IL2 of the standby optical fiber link, and the uplink optical power PDy (AAU- > DU) = PDy of the standby optical fiber link;
when the optical switch is operated in the backup optical fiber link, the uplink optical power PDx (AAU- > DU) = PDx of the primary optical fiber link, the uplink optical power PDy (AAU- > DU) = PD1+ PD2+ \ 8230, + PDm + IL1+ IL2 of the backup optical fiber link.
In one embodiment, step S105 includes:
if the optical switch works in the primary optical fiber link, the uplink optical power of the primary optical fiber link is greater than a first threshold value, and the uplink optical power of the standby optical fiber link is greater than a second threshold value, the working link of the optical switch is not switched;
if the optical switch works in the standby optical fiber link, the uplink optical power of the main optical fiber link is larger than a first threshold value, and the uplink optical power of the standby optical fiber link is larger than a second threshold value, the working link of the optical switch is switched to the main optical fiber link;
if the optical switch works in the primary optical fiber link, the uplink optical power of the primary optical fiber link is smaller than a first threshold value, and the uplink optical power of the standby optical fiber link is larger than a second threshold value, the working link of the optical switch is switched to the standby optical fiber link;
if the optical switch works in the standby optical fiber link, the uplink optical power of the main optical fiber link is larger than a first threshold value, and the uplink optical power of the standby optical fiber link is larger than a second threshold value, the working link of the optical switch is not switched;
if the optical switch works in the primary optical fiber link, the uplink optical power of the primary optical fiber link is greater than a first threshold value, and the uplink optical power of the standby optical fiber link is less than a second threshold value, the working link of the optical switch is not switched;
if the optical switch works in the standby optical fiber link, the uplink optical power of the main optical fiber link is larger than a first threshold value, and the uplink optical power of the standby optical fiber link is smaller than a second threshold value, the working link of the optical switch is switched to the main optical fiber link;
if the optical switch works in the primary optical fiber link, the uplink optical power of the primary optical fiber link is smaller than a first threshold value, and the uplink optical power of the standby optical fiber link is smaller than a second threshold value, the working link of the optical switch is not switched;
if the optical switch works in the standby optical fiber link, the uplink optical power of the main optical fiber link is smaller than a first threshold value, and the uplink optical power of the standby optical fiber link is smaller than a second threshold value, the working link of the optical switch is not switched.
As shown in fig. 3, the relationship between the current link of the optical switch, the uplink optical power PDx (AAU- > DU) of the primary optical fiber link, the first threshold value Vx, the uplink optical power PDy (AAU- > DU) of the backup optical fiber link, the second threshold value Vy, and the switching state of the working link of the optical switch is exemplarily shown.
In an embodiment, the optical fiber link switching method provided in the embodiment of the present application further includes:
if the optical switch works in the main optical fiber link, acquiring the optical power of the corresponding downlink optical fiber link based on each downlink optical detection unit;
calculating the downlink optical power of the main optical fiber link according to the optical power of all the downlink optical fiber links;
if the optical switch works in the standby optical fiber link, acquiring the optical power of the corresponding downlink optical fiber link based on each downlink optical detection unit;
and calculating the downlink optical power of the standby optical fiber link according to the optical powers of all the downlink optical fiber links.
In application, based on the same principle as that of affecting the optical power of an uplink optical signal, in the case where the optical power of a downlink optical fiber link needs to be measured, the uplink optical signal from the passive wavelength division device also affects the optical power of the downlink optical fiber link measured based on the primary optical detector or the backup optical detector, so that, when the optical switch works in the primary optical fiber link, the optical power of one downlink optical fiber link correspondingly connected to the optical switch can be obtained through each downlink optical detection unit, and then the downlink optical power of the primary optical fiber link is calculated according to the optical power of all the downlink optical fiber links, which is more accurate than the downlink optical power of the primary optical fiber link measured directly based on the primary optical detector; similarly, when the optical switch operates in the standby optical fiber link, the optical power of one downlink optical fiber link correspondingly connected to the optical switch may be first obtained through each downlink optical detection unit, and then the downlink optical power of the standby optical fiber link may be calculated according to the optical powers of all the downlink optical fiber links.
In the first structure of the downlink optical detection unit, because the downlink optical detector only uses a part of optical signals in the downlink optical fiber link to measure the optical power of the downlink optical fiber link, the optical power of the downlink optical fiber link is actually equal to the ratio between the optical power collected by the downlink optical detector and the light splitting ratio of the third end of the downlink optical detector, and the light splitting ratio of the downlink optical detector is 98: when 2, the light splitting ratio of the third end is 2%, and the light splitting ratio of the downlink light splitting detector is 99: when 1, the light splitting ratio of the third end is 1%; similarly, based on the second structure of the downlink optical detection unit, the optical power of the downlink optical fiber link is actually equal to the ratio between the optical power collected by the downlink optical detector and the splitting ratio of the third end of the corresponding downlink optical splitter, and the splitting ratio of the downlink optical splitter is 98: when 2, the splitting ratio of the third end is 2%, and the splitting ratio of the downlink optical splitter is 99: the light splitting ratio of the third end is 1%.
In an embodiment, the optical fiber link switching method provided in the embodiment of the present application further includes:
if the optical switch works on the primary optical fiber link, acquiring the optical power of the primary optical fiber link based on the primary optical detector;
calculating the downlink optical power of the primary optical fiber link according to the optical power of the primary optical fiber link and the uplink optical power of the primary optical fiber link;
if the optical switch works in the standby optical fiber link, acquiring the optical power of the standby optical fiber link based on the standby optical detector;
and calculating the downlink optical power of the standby optical fiber link according to the optical power of the standby optical fiber link and the uplink optical power of the standby optical fiber link.
In application, because the optical power measured based on the primary optical detector is the sum of the uplink optical power and the downlink optical power of the primary optical fiber link, when the optical switch works on the primary optical fiber link, the uplink optical power of the primary optical fiber link can be subtracted from the optical power of the primary optical fiber link to obtain the downlink optical power of the primary optical fiber link; similarly, since the optical power measured by the backup optical detector is the sum of the uplink optical power and the downlink optical power of the backup optical fiber link, when the optical switch operates in the backup optical fiber link, the uplink optical power of the backup optical fiber link may be subtracted from the optical power of the backup optical fiber link to obtain the downlink optical power of the backup optical fiber link.
In application, based on the optical fiber link switching method provided by the embodiment of the application, the network management device can accurately measure the uplink optical power and the downlink optical power of the working link of the forward-transmission semi-active wavelength division system, so that the accurate switching of the working link of the optical switch can be realized, and the accurate receiving/sending, monitoring and management of optical communication data can be further realized.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The embodiment of the present application further provides an optical fiber link switching device, which is used for executing the steps in the foregoing optical fiber link switching method embodiment. The optical fiber link switching device may be a virtual appliance (virtual application) in the network management device, which is executed by a processor of the network management device, or may be the network management device itself.
As shown in fig. 4, an optical fiber link switching apparatus 100 provided in the embodiment of the present application includes:
a first uplink optical power obtaining unit 101, configured to, if the optical switch operates in the primary optical fiber link, obtain optical power of a corresponding uplink optical fiber link based on each uplink optical detection unit, obtain uplink optical power of a spare optical fiber link based on a spare optical detector, and enter a first uplink optical power calculating unit 102;
a first uplink optical power calculating unit 102, configured to calculate uplink optical power of the primary optical fiber link according to optical powers of all uplink optical fiber links, and enter the optical fiber link switching unit 105;
a second uplink optical power obtaining unit 103, configured to, if the optical switch operates in the spare optical fiber link, obtain the uplink optical power of the main optical fiber link based on the main optical detector, obtain the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit, and enter a second uplink optical power calculating unit 104;
a second uplink optical power calculating unit 104, configured to calculate uplink optical power of the standby optical fiber link according to optical power of all uplink optical fiber links, and enter the optical fiber link switching unit 105;
and an optical fiber link switching unit 105, configured to determine whether to switch an operating link of the optical switch according to the uplink optical power of the primary optical fiber link and the uplink optical power of the standby optical fiber link.
In one embodiment, the optical fiber link switching apparatus further comprises:
a first downlink optical power obtaining unit, configured to obtain, based on each downlink optical detection unit, an optical power of a corresponding downlink optical fiber link if the optical switch operates in the primary optical fiber link;
the first downlink optical power calculating unit is used for calculating the downlink optical power of the main optical fiber link according to the optical power of all the downlink optical fiber links;
a second downlink optical power obtaining unit, configured to obtain, based on each downlink optical detection unit, an optical power of a corresponding downlink optical fiber link if the optical switch operates in the spare optical fiber link;
and the second downlink optical power calculating unit is used for calculating the downlink optical power of the standby optical fiber link according to the optical power of all the downlink optical fiber links.
In one embodiment, the optical fiber link switching apparatus further comprises:
the first optical power acquisition unit is used for acquiring the optical power of the primary optical fiber link based on the primary optical detector if the optical switch works on the primary optical fiber link;
the first optical power calculating unit is used for calculating the downlink optical power of the main optical fiber link according to the optical power of the main optical fiber link and the uplink optical power of the main optical fiber link;
the second optical power acquisition unit is used for acquiring the optical power of the standby optical fiber link based on the standby optical detector if the optical switch works in the standby optical fiber link;
and the second optical power calculating unit is used for calculating the downlink optical power of the standby optical fiber link according to the optical power of the standby optical fiber link and the uplink optical power of the standby optical fiber link.
In application, each unit in the optical fiber link switching device may be a software program module, may also be implemented by different logic circuits integrated in a processor, and may also be implemented by a plurality of distributed processors.
As shown in fig. 5, an embodiment of the present application further provides a network management device 200, including: at least one processor 201 (only one processor is shown in fig. 5), a memory 202, and a computer program 203 stored in the memory 202 and executable on the at least one processor 201, the steps in the various fiber link switching method embodiments described above being implemented when the computer program 203 is executed by the processor 201.
In an application, the network management device may include, but is not limited to, a memory, a processor. Those skilled in the art will appreciate that fig. 5 is merely an example of a network management device and is not intended to be limiting, and may include more or fewer components than those shown, or some components may be combined, or different components may be included, such as input output devices, network access devices, etc. The input and output devices may include a camera, an audio capture/playback device, a display device, a keyboard, keys, and the like. The network access device may include a communication module for communicating with other devices. The processor is connected with the main optical detector, the standby optical detector, the plurality of uplink optical detection units and the plurality of downlink optical detection units in the fronthaul semi-active wavelength division system, so as to obtain the optical power of the corresponding optical path according to the electrical signals output by the components after the optical signals are subjected to photoelectric conversion.
In Application, the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and the like. A general purpose processor may be a microprocessor or any conventional processor or the like.
In some embodiments, the storage may be an internal storage unit of the network management device, such as a hard disk or a memory of the network management device. The memory may also be an external storage device of the network management device in other embodiments, such as a plug-in hard disk provided on the network management device, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and so on. Further, the memory may also include both an internal storage unit of the network management device and an external storage device. The memory is used for storing an operating system, an application program, a Boot Loader (Boot Loader), data, and other programs, such as program codes of computer programs. The memory may also be used to temporarily store data that has been output or is to be output.
In an application, the Communication module may be any device capable of performing wired or Wireless Communication directly or indirectly with other devices according to actual needs, for example, the Communication module may provide a solution including a Communication interface (e.g., universal Serial Bus (USB), a wired Local Area Network (LAN), a Wireless Local Area Network (WLAN) (e.g., a Wireless-Fi network), bluetooth, zigbee, a mobile Communication network, global Navigation Satellite System (GNSS), frequency Modulation (FM), wireless Communication technology (NFC), infrared technology (Infrared, IR), and the like, which are applied to the network device.
It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units is merely illustrated, and in practical applications, the above function distribution may be performed by different functional units according to needs, that is, the internal structure of the device is divided into different functional units to perform all or part of the above described functions. Each functional unit in the embodiments may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the present application. The specific working process of the units in the system may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
The embodiment of the present application provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for switching an optical fiber link according to any of the above embodiments is implemented.
The embodiments of the present application provide a computer program product, which, when running on a network management device, causes the network management device to execute the optical fiber link switching method of any one of the above embodiments.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above may be implemented by a computer program instructing related hardware to execute the computer program, and the computer program may be stored in a computer readable storage medium, and when executed by a processor, may implement the steps of the embodiments of the methods described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or apparatus capable of carrying computer program code to a network management device, recording medium, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, and software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus, network management device and method may be implemented by other methods. For example, the above-described embodiments of the apparatus and the network management device are merely illustrative, and for example, a division of a unit is only a logical division, and an actual implementation may have another division method, for example, two or more units or components may be combined or may be integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (10)
1. The optical fiber link switching method is characterized by being applied to a forward-transmission semi-active wavelength division system, wherein the forward-transmission semi-active wavelength division system comprises passive wavelength division equipment, active wavelength division equipment, a main optical splitter, a main optical detector, a standby optical splitter, a standby optical detector and a plurality of uplink optical detection units, the passive wavelength division equipment comprises a passive wavelength division multiplexer and a coupler, and the active wavelength division equipment comprises an optical switch and an active wavelength division multiplexer;
the path combining end of the passive wavelength division multiplexer is connected with the first end of the coupler, the second end of the coupler is connected with the first end of the primary optical splitter through a primary optical fiber link, and the third end of the coupler is connected with the first end of the standby optical splitter through a standby optical fiber link;
the second end and the third end of the main optical splitter are respectively connected with the first end of the optical switch and the main optical detectors in a one-to-one correspondence manner, the second end and the third end of the standby optical splitter are respectively connected with the second end of the optical switch and the standby optical detectors in a one-to-one correspondence manner, the third end of the optical switch is connected with the combining end of the active wavelength division multiplexer, and each uplink optical detection unit is respectively connected with one uplink branching end and one uplink optical fiber link of the active wavelength division multiplexer in a corresponding manner;
the optical fiber link switching method comprises the following steps:
if the optical switch works in the primary optical fiber link, acquiring the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit, and acquiring the uplink optical power of the standby optical fiber link based on the standby optical detector;
calculating the uplink optical power of the main optical fiber link according to the optical power of all the uplink optical fiber links;
if the optical switch works in the standby optical fiber link, acquiring the uplink optical power of the primary optical fiber link based on the primary optical detector, and acquiring the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit;
calculating the uplink optical power of the standby optical fiber link according to the optical power of all the uplink optical fiber links;
and determining whether to switch the working link of the optical switch according to the uplink optical power of the main optical fiber link and the uplink optical power of the standby optical fiber link.
2. The method for switching the optical fiber link according to claim 1, wherein the calculating the uplink optical power of the primary optical fiber link according to the optical powers of all the uplink optical fiber links includes:
calculating the sum of the optical power of all the uplink optical fiber links, the insertion loss of the active wavelength division multiplexer and the insertion loss of the optical switch to obtain the uplink optical power of the primary optical fiber link;
the calculating the uplink optical power of the spare optical fiber link according to the optical powers of all the uplink optical fiber links includes:
and calculating the sum of the optical power of all the uplink optical fiber links, the insertion loss of the active wavelength division multiplexer and the insertion loss of the optical switch to obtain the uplink optical power of the standby optical fiber link.
3. The optical fiber link switching method according to claim 1, wherein the obtaining the uplink optical power of the backup optical fiber link based on the backup optical detector comprises:
calculating the ratio of the optical power acquired by the standby optical detector to the light splitting ratio of the third end of the standby optical splitter to obtain the uplink optical power of the standby optical fiber link;
the acquiring the uplink optical power of the primary optical fiber link based on the primary optical detector includes:
and calculating the ratio of the optical power acquired by the main optical detector to the light splitting ratio of the third end of the main optical splitter to obtain the uplink optical power of the main optical fiber link.
4. The optical fiber link switching method according to claim 1, wherein the upstream optical detecting unit is an upstream optical splitting detector;
the obtaining the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit includes:
and calculating the ratio of the optical power collected by each uplink light splitting detector to the light splitting ratio of the third end of the uplink light splitting detector to obtain the optical power of the corresponding uplink optical fiber link.
5. The optical fiber link switching method according to claim 1, wherein the upstream optical detection unit includes an upstream optical splitter and an upstream optical detector;
the first end, the second end and the third end of the uplink optical splitter are correspondingly connected with one uplink splitter end, one uplink optical fiber link and the uplink optical detector respectively;
the obtaining the optical power of the corresponding uplink optical fiber link based on each uplink optical detection unit includes:
and calculating the ratio of the optical power collected by each uplink optical detector to the light splitting ratio of the third end of the uplink optical splitter to obtain the optical power of the corresponding uplink optical fiber link.
6. The optical fiber link switching method according to any one of claims 1 to 5, wherein the determining whether to switch the working link of the optical switch according to the uplink optical power of the primary optical fiber link and the uplink optical power of the backup optical fiber link includes:
if the optical switch works in the primary optical fiber link, the uplink optical power of the primary optical fiber link is smaller than a first threshold value, and the uplink optical power of the standby optical fiber link is larger than a second threshold value, the working link of the optical switch is switched to the standby optical fiber link;
and if the optical switch works in the standby optical fiber link and the uplink optical power of the main optical fiber link is greater than a first threshold value, switching the working link of the optical switch to the main optical fiber link.
7. The optical fiber link switching method according to any one of claims 1 to 5, wherein the forward-transmitting semi-active wavelength division system further comprises a plurality of downstream optical detection units;
each downlink optical detection unit is correspondingly connected with one downlink branch end and one downlink optical fiber link of the active wavelength division multiplexer respectively;
the optical fiber link switching method further comprises the following steps:
if the optical switch works in the primary optical fiber link, acquiring the optical power of the corresponding downlink optical fiber link based on each downlink optical detection unit;
calculating the downlink optical power of the main optical fiber link according to the optical power of all the downlink optical fiber links;
if the optical switch works in the standby optical fiber link, acquiring the optical power of the corresponding downlink optical fiber link based on each downlink optical detection unit;
and calculating the downlink optical power of the standby optical fiber link according to the optical power of all the downlink optical fiber links.
8. An optical fiber link switching device is applied to a forward-transmission semi-active wavelength division system, wherein the forward-transmission semi-active wavelength division system comprises passive wavelength division equipment, active wavelength division equipment, a main optical splitter, a main optical detector, a standby optical splitter, a standby optical detector and a plurality of uplink optical detection units, the passive wavelength division equipment comprises a passive wavelength division multiplexer and a coupler, and the active wavelength division equipment comprises an optical switch and an active wavelength division multiplexer;
the path combining end of the passive wavelength division multiplexer is connected with the first end of the coupler, the second end of the coupler is connected with the first end of the primary optical splitter through a primary optical fiber link, and the third end of the coupler is connected with the first end of the standby optical splitter through a standby optical fiber link;
the second end and the third end of the main optical splitter are respectively connected with the first end of the optical switch and the main optical detector in a one-to-one correspondence manner, the second end and the third end of the standby optical splitter are respectively connected with the second end of the optical switch and the standby optical detector in a one-to-one correspondence manner, the third end of the optical switch is connected with the combining end of the active wavelength division multiplexer, and each uplink optical detection unit is respectively connected with one uplink branching end and one uplink optical fiber link of the active wavelength division multiplexer in a corresponding manner;
the optical fiber link switching device comprises:
a first uplink optical power obtaining unit, configured to obtain, based on each uplink optical detection unit, an optical power of a corresponding uplink optical fiber link and obtain, based on the standby optical detector, an uplink optical power of the standby optical fiber link, if the optical switch operates in the primary optical fiber link;
the first uplink optical power calculating unit is used for calculating the uplink optical power of the main optical fiber link according to the optical power of all the uplink optical fiber links;
a second uplink optical power obtaining unit, configured to obtain, if the optical switch operates in the standby optical fiber link, the uplink optical power of the primary optical fiber link based on the primary optical detector, and obtain, based on each uplink optical detection unit, the optical power of the corresponding uplink optical fiber link;
a second uplink optical power calculating unit, configured to calculate uplink optical power of the spare optical fiber link according to optical power of all the uplink optical fiber links;
and the optical fiber link switching unit is used for determining whether to switch the working link of the optical switch according to the uplink optical power of the primary optical fiber link and the uplink optical power of the standby optical fiber link.
9. A network management device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of the fiber link switching method according to any one of claims 1 to 7.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the fiber link switching method according to any one of claims 1 to 7.
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