CN115276783A - Front-transmission optical module WDM device and network management method thereof - Google Patents
Front-transmission optical module WDM device and network management method thereof Download PDFInfo
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- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- 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
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Abstract
The application discloses optical module WDM system of fronthaul, include: a plurality of remote optical modules; the passive WDM module comprises a far-end combining and splitting unit and is used for combining or splitting light transmitted between a plurality of passive light branches corresponding to the far-end optical modules and a light main link; a plurality of local side optical modules; and an active WDM module comprising: a near-end wavelength multiplexing/demultiplexing unit, configured to multiplex or demultiplex light transmitted between the light main link and a plurality of active light branches corresponding to the plurality of local-end optical modules; and the optical power monitoring unit is respectively connected with the light main link and the active light branches to perform light receiving monitoring. The method can solve the problems that the network management is misread and the protection switching is not executed due to the reflection return loss of the local side signal at the breakpoint of the main link in the existing semi-active system, or the error switching is caused by the reduction of the far-end incoming light triggering protection threshold when the trunk optical fiber link is intact.
Description
Technical Field
The application relates to the technical field of optical communication of 4G/5G network forward transmission/intermediate transmission/return transmission, in particular to semi-active WDM equipment and a network management logic algorithm.
Background
With the evolution of operator station deployment from D-RAN (Distributed RAN, distributed radio access network) to C-RAN (Centralized RAN, centralized radio access network), the 5G forward technology has evolved from the traditional gray light direct drive scheme to passive WDM (Wavelength Division Multiplexing) and semi-active WDM scheme, and the semi-active WDM remote end does not need to supply power, introduces link protection and monitoring functions, and is currently more and more pursued by operators.
The semi-active WDM scheme is in the high-speed development period of technology and application at present, the industrial chain is in the initial scale, and the industrial application is gradually followed up; the semi-active WDM scheme has the main advantages of link protection and monitoring, wherein the link protection is generally realized by adding a protection link and arranging an optical switch switching link on a local side board card, and the application requirements can be met at present; however, the application of the monitoring function of the semi-active scheme is still in the initial development stage of the current device and network management development, and is difficult to compare with the mature communication device.
Most of board cards of the existing semi-active WDM equipment support link protection, namely when a certain link fails, the link can be detected and switched to a protection link through a monitoring PD of a trunk, so that the continuity of service is realized; however, the existing semi-active device and network management logic have the following defects in practical application:
(1) There is no good method for positioning the obstacle clearance; although the service board card of the semi-active device can be quickly switched to the protection link, there is no good method for locating the breakpoint. The monitoring center, the forward-transmission DU/BBU local station and the remote AAU station are all arranged at a certain distance, so that the obstacle removing positioning is inconvenient and intelligent, and the operator needs to find out the obstacle removing positioning of the OTDR equipment for the fault service unit on the site of the local machine room and then reach the breakpoint removing solution; the obstacle removing time efficiency is long, and the efficiency is low;
(2) There is no good method for business expansion; if the existing forwarding service involves service upgrade or scheme change, only the board card can be replaced; thus, service interruption is inevitably caused;
(3) The semi-active network manager generates a breakpoint on the main link, and when a fault occurs, network manager misreading caused by reflection return loss of a local side signal at the breakpoint exists, so that the fault cannot be reported;
(4) The existing semi-active network management is not clear enough for the positioning presentation of the fault, and the alarm dyeing function of other mature equipment is not provided or is incomplete; alarm coloring logic based on OAM information is lacking.
Disclosure of Invention
The invention provides a WDM system, equipment and a network management method of a forward transmission optical module aiming at least one defect or improvement requirement in the prior art, and aims to solve the problem that the network management misreading is possibly caused by reflection return loss of local side signals at break points of a main link so as not to execute protection switching, or the problem of the misreading is caused by that far-end incoming light reduces a trigger protection threshold when a trunk optical fiber link is intact in the existing semi-active system.
To achieve the above object, according to a first aspect of the present invention, there is provided a fronthaul optical module WDM system including: a plurality of remote optical modules; the passive WDM module comprises a far-end combining and splitting unit and is used for combining or splitting light transmitted between a plurality of passive light branches corresponding to the far-end optical modules and a light main link; a plurality of local optical modules; and an active WDM module comprising: a near-end wavelength multiplexing/demultiplexing unit, configured to multiplex or demultiplex light transmitted between the light main link and a plurality of active light branches corresponding to the plurality of local-end optical modules; and the optical power monitoring unit is respectively connected with the light main link and the active light branches to perform light receiving monitoring.
In one embodiment of the present invention, the near-end multiplexer/demultiplexer unit includes: and the OTDR monitoring interface is connected to the main light link through a corresponding optical monitoring wave plate, and is used for supporting connection of an OTDR functional board card and realizing OTDR fault monitoring.
In one embodiment of the present invention, the near-end multiplexer/demultiplexer unit includes: at least two main light line optical interfaces respectively connected with at least two light line main links which are backed up mutually; the MEMS optical switches are respectively connected to the at least two main link optical interfaces and used for switching and connecting to the standby light main link when a protection switching condition is triggered; the plurality of branch optical interfaces are respectively connected with the corresponding light branches; the plurality of light splitting wave plates and the plurality of light receiving wave plates are sequentially connected to the MEMS optical switch in a cascade mode and are used for receiving light of the main link, separating the light according to wavelength and then sending the light to the corresponding branch optical interface, or receiving a plurality of branch light with corresponding wavelength and then sending the light to the light main link; and the plurality of light splitting detectors are respectively connected with the main link optical interfaces and the branch optical interfaces and are used for detecting the optical power of the corresponding light main link and the light branch.
In an embodiment of the present invention, the near-end multiplexer/demultiplexer further includes: and the cascade expansion interface is cascaded with the plurality of light splitting wave plates and the plurality of light combining wave plates together and is used for supporting the cascade access of a service board card comprising a plurality of light branches. Preferably, the cascade expansion interface is located at the last stage of the cascade structure.
In an embodiment of the present invention, the OTDR functional board includes: the OTDR module and the MEMS optical switch connected with the OTDR module; and the plurality of service board cards are respectively connected to the MEMS optical switch after being cascaded through the respective cascade expansion interfaces, so that the OTDR monitoring interfaces of the service board cards share the OTDR functional board card to monitor the faults of the service board cards.
According to a second aspect of the present invention, there is further provided a method for managing a WDM network of a fronthaul optical module, which is applicable to the WDM system of any one of the foregoing embodiments, and includes: collecting optical power monitoring values of light coming from a far end at each light ray branch side of an active WDM module; if the collected optical power monitoring values of all the optical branches of the active WDM module are all reduced to a preset threshold value, determining that a breakpoint exists in the current main link of the active WDM module, and executing protection switching to switch to a standby main link; and if the collected optical power monitoring value of any one optical line branch is not reduced to the preset threshold value, determining that the current main link of the active WDM module is not damaged, and not executing switching.
In an embodiment of the present invention, the method for managing WDM network of the fronthaul optical module further includes: respectively analyzing OAM signals of a receiving light branch and a sending light branch of a local optical module of the active WDM module to obtain corresponding optical power monitoring values; and judging the position of a fault point of an optical module or an optical link in the WDM system of the fronthaul optical module according to the optical power monitoring value.
In an embodiment of the present invention, the determining a location of a fault point of an optical module or an optical link in the fronthaul optical module WDM system according to the optical power monitoring value includes: in OAM information of a local optical module, the local receiving optical power is-40 dBm, the transmitting optical power is normal, the remote receiving optical power and the remote transmitting optical power are-40 dBm, the optical power monitoring value of a channel corresponding to the remote optical module is-40 dBm, and the optical power monitoring value of the channel corresponding to the local optical module is normal, so that the transmitting link fault of the remote optical module is judged; when the local end receiving and emitting power in the OAM information of the local end optical module is normal, the remote end emitting optical power is normal, the receiving optical power is-40 dBm, and the optical power monitoring values of channels corresponding to the remote end optical module and the local end optical module are normal, judging that a receiving link of the remote end optical module is in fault; in OAM information of the local optical module, the local optical module transmits normal optical power and receives optical power of-40 dBm, the remote optical module receives and transmits optical power of-40 dBm, and the optical power monitoring value of a channel corresponding to the local optical module is normal, and then the main link is judged to be in fault; when the OAM information of the local optical module has the receiving optical power of-40 dBm at the home terminal and the transmitting optical power is normal, the receiving optical power and the transmitting optical power of the remote optical module are both-40 dBm, and the optical power monitoring value of the channel corresponding to the remote optical module is normal, the receiving link fault of the local optical module is judged; and judging the fault of a transmitting link of the local optical module if the local receiving and light emitting power in the OAM information of the local optical module is-40 dBm, the remote receiving and light emitting power is-40 dBm and the optical power monitoring value of a corresponding channel of the local optical module is-40 dBm.
According to a third aspect of the present invention, there is also provided an electronic device comprising at least one processing unit, and at least one memory unit, wherein the memory unit stores a computer program that, when executed by the processing unit, causes the processing unit to perform the steps of the method of any of the above embodiments.
According to a fourth aspect of the present invention, there is also provided a computer-readable storage medium storing a computer program executable by an access authentication apparatus, the computer program causing the access authentication apparatus to perform the steps of the method of any one of the above embodiments when the computer program runs on the access authentication apparatus.
In general, compared with the prior art, the above technical solutions conceived by the present invention can achieve at least the following beneficial effects:
1) By adding the light splitting judgment of each branch circuit on the breakpoint fault judgment logic of the main link, the problem of network management misreading risk caused by reflection return loss of a semi-active local side when only the main link is subjected to light splitting judgment is solved, meanwhile, the phenomenon that the light coming from a far end is reduced to trigger a main link switching threshold when a certain part of all optical modules at the far end are in fault is avoided, and the risk of misreading when the main link is intact is eliminated;
2) By adding the reserved cascade expansion interface and the OTDR monitoring interface on a system hardware architecture, the cascade connection of similar/heterogeneous service/function board cards can be supported, the function expansibility and compatibility of equipment are improved, corresponding service board cards can be added on the premise of not disconnecting the original service board cards along with the increase of services, the OTDR and other monitoring function board cards can be supported, the investment of users can be effectively protected, and a method for providing remote fault-removing positioning is supported;
3) A set of alarm dyeing processing logic is provided, the position of a fault point of an optical module or each link can be remotely and accurately judged based on an OAM signal and a PD monitoring value analyzed by a semi-active local side optical module, and the alarm dyeing processing logic is visually and visually presented on a network management operation and maintenance monitoring interface, so that remote intelligent operation and maintenance can be realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and 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 obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a fronthaul optical module WDM system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an active WDM module provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a fronthaul optical module WDM apparatus provided in an embodiment of the present application;
fig. 4 is a flowchart of a WDM network management method for a fronthaul optical module according to an embodiment of the present application;
fig. 5 is a logic schematic diagram of a WDM network management method for a forward optical module according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, a first embodiment of the present invention provides a fronthaul optical module WDM system, for example, including: a plurality of remote optical modules, a passive WDM (Wavelength Division Multiplexing) module, a plurality of local optical modules and an active WDM module.
The passive WDM module includes a far-end wavelength-combining and splitting unit for combining or splitting light transmitted between a plurality of passive light branches corresponding to the plurality of far-end optical modules and the light main link. The active WDM module comprises a near-end wavelength combining and splitting unit and an optical power monitoring unit, the near-end wavelength combining and splitting unit is used for light combining or splitting of transmission light between a plurality of active light branches corresponding to the plurality of local-end optical modules and a light main link, and the optical power monitoring unit is respectively connected with the light main link and the plurality of active light branches for light receiving monitoring.
Specifically, as shown in fig. 2, the near-end multiplexer/demultiplexer unit includes, for example: at least two main-link optical interfaces are respectively connected with at least two optical main links which are backed up with each other, for example, a COM interface is switched on under the normal condition of the current main link, when a breakpoint exists in the current main link, protection switching is executed to switch to a PRO interface, a standby main link is switched on, and service continuity is realized. And the MEMS optical switches are respectively connected to the at least two main link optical interfaces and are used for controlling link switching when triggering the protection switching condition. And the plurality of branch optical interfaces are respectively connected with the corresponding light branches. The light splitting wave plates are used for receiving light of the main link, sequentially separating the light according to the wavelength and then sending the light to corresponding branch light interfaces, and the light receiving wave plates are used for receiving a plurality of branch light of corresponding wavelength and sending the light to the light main link. And the plurality of light splitting detectors are respectively connected with the main link optical interfaces and the branch optical interfaces and are used for detecting the optical power of the corresponding light main link and the light branch.
The following describes the beneficial effect of the front-end optical module WDM system provided in this embodiment of the present invention for performing main link breakpoint judgment with reference to the prior art:
the switching logic of the existing semi-active network management is realized by monitoring the power of a main link, and the power actually reaching a monitoring end is about-5 dBm due to the fact that far-end incoming light has 50% of light splitting and loss of transmission distance; in order to avoid the reduction of the optical power of the trunk circuit caused by the fault of part of the far-end optical modules (not all the optical modules) when the trunk circuit is intact and further trigger the protection switching, the existing switching threshold is set to be lower, generally about-15 dBm, which is at the same power level as the reflection return loss of the large composite wave light at the break point of the local side, and thus the service interruption caused by the unprotected switching is very easy to occur.
As shown in connection with fig. 2, in prior art solutions e.g. only by PD1Receiving light to judge whether a main link is in fault, but the logic defect is that the reflection return loss of local side large light at a breakpoint and the reflection return loss of far-end light are in the same order of magnitude, so that misjudgment is easy to cause non-switching, and further actual service is interrupted; or when some optical module in all the optical modules at the far end fails to cause the reduction of the light coming from the far end to trigger the PD1And switching threshold, and performing error switching when the main link is intact.
The main link switching logic in this embodiment adopts branch side monitoring and determining, for example, a main control board collects a monitoring value of PD4/PD6/PD8 of far-end incoming light at a branch side, and if the collected monitoring value of PD4/PD6/PD8 is all reduced to a preset threshold value, such as-40 dBm (approximately no light input), it is determined that a breakpoint exists in the current main link connected to the COM interface, and protection switching is performed; if the monitoring values of PD4/PD6/PD8 collected by the main control board are not all reduced to-40 dB, if any path of far-end incoming light has no obvious fluctuation, the current main link is determined to be normal and not damaged, and switching is not executed, so that the problems caused by the two conditions are thoroughly avoided.
Further, the near-end multiplexer/demultiplexer unit further includes, for example: the OTDR monitoring interface is connected with a corresponding optical monitoring wave plate (such as lambda in figure 2)0Wave plates) are cascaded with the plurality of light splitting wave plates and the plurality of light receiving wave plates, are positioned at the first stage and are used for supporting and connecting the OTDR functional board card and realizing OTDR fault monitoring. Therefore, the application of the OTDR function in the WDM system can support the remote breakpoint troubleshooting of the main link, and the problem that time and labor are consumed when an operation and maintenance worker reaches the site of a station to troubleshoot a breakpoint to solve a fault after the operation and maintenance worker reaches the site of the station to troubleshoot the fault is avoided.
Further, the near-end multiplexer/demultiplexer unit further includes, for example: and the cascade expansion interface is cascaded with the plurality of light splitting wave plates and the plurality of light receiving wave plates, is preferably positioned at the last stage of the cascade structure and is used for supporting the cascade access of a service board card comprising a plurality of light branches. The cascade expansion interface supports the cascade access of the service board cards of different schemes besides the service board cards of different wavelengths of the same scheme; for example, 12-wave service is realized by a cascaded 6-wave board card for a CWDM6 wave, and 18-wave service is realized by a cascaded 6-wave CWDM board card for an LWDM 12 wave. Therefore, the reserved expansion interface is added on the hardware architecture of the equipment to support the cascade connection of the same-type/different-type business/function board cards, the function expansibility and compatibility of the equipment are improved, and the corresponding business board cards can be added on the premise of not disconnecting the original business board cards along with the increase of the business.
Referring to fig. 3, the OTDR functional board includes, for example, an OTDR module and an MEMS optical switch connected to the OTDR module; for example, after being cascaded through the respective cascade expansion interfaces, a plurality of service boards are respectively connected to the MEMS optical switch, for example, as shown in fig. 3, 8 service boards are correspondingly connected to 1: and 8, the MEMS optical switch enables all the service board cards to share the OTDR function board card through the OTDR monitoring interface of the service board cards, namely, the same active WDM module comprises a plurality of cascaded service board cards, and the corresponding optical main link and the MEMS optical switch are shared, so that fault monitoring of all the service board cards is realized. Certainly, in other embodiments, for a plurality of active WDM modules, a plurality of service boards corresponding to the plurality of active WDM modules are not cascaded and are respectively transmitted through respective optical main links, and the plurality of service boards of the plurality of active WDM modules may also share the MEMS optical switch and the OTDR device through their own OTDR monitoring interfaces. Therefore, the investment of users can be reduced, and the utilization rate of equipment can be improved. It is worth mentioning that the OTDR monitoring function may be integrated in the semi-active WDM system and exist in the form of a function board, or may be implemented by an independent external OTDR device in a manner of switching and monitoring OTDR ports of semi-active different service boards through an optical switch.
As shown in fig. 4, a third embodiment of the present invention further provides a WDM network management method for a fronthaul optical module, which includes: s1, collecting optical power monitoring values of light coming from a far end at each light branch side of an active WDM module; s2, if the collected optical power monitoring values of all the light branches of the active WDM module are all reduced to a preset threshold value, determining that a breakpoint exists in the current main link of the active WDM module, and executing protection switching to switch to a standby main link; and step S3, if the collected optical power monitoring value of any one optical branch is not reduced to the preset threshold value, determining that the current main link of the active WDM module is not damaged, and not executing switching.
Further, the method for WDM network management of the fronthaul optical module further includes, for example: respectively analyzing OAM signals of a receiving light branch and a sending light branch of a local optical module of the active WDM module to obtain corresponding optical power monitoring values; and judging the position of a fault point of an optical module or an optical link in the WDM system of the fronthaul optical module according to the optical power monitoring value.
Further, as shown in fig. 5, the fault determination logic of the transmitting link (position (1)) of the remote optical module is that the local receiving optical power in the OAM information of the local optical module b is-40 dBm, the transmitting optical power is normal, and both the remote receiving optical power and the transmitting optical power are-40 dBm; the PD monitoring value of the channel corresponding to the far-end optical module a is-40 dBm, and the PD monitoring value of the channel corresponding to the local optical module b is normal.
The receiving link (position (2)) fault judgment logic of the far-end optical module is that the receiving power and the luminous power of the local end in the OAM information of the local-end optical module b are normal, the transmitting power of the far-end is normal, and the receiving power is-40 dBm; the PD monitoring values of the channels corresponding to the remote optical module a and the local optical module b are normal.
The decision logic of the main link (position (3)) fault is that the local transmitting optical power of the OAM information of all the local optical modules b is normal, the receiving optical power is-40 dBm, and the far-end receiving optical power and the far-end emitting optical power are all-40 dBm; the PD monitoring value of the channel corresponding to the far-end optical module a is-40 dBm, and the PD monitoring value of the channel corresponding to the local optical module b is normal.
The logic for judging the fault of the receiving link (position (4)) of the local optical module is that the receiving optical power of the local optical module is-40 dBm and the transmitting optical power is normal in the OAM information of the local optical module b, and the receiving and transmitting optical powers of the far end are both-40 dBm; the PD monitoring value of the channel corresponding to the far-end optical module a is normal.
The logic for judging the fault of the transmitting link (position (5)) of the local optical module is that the receiving power and the luminous power of the local optical module are all-40 dBm and the receiving power and the luminous power of the remote optical module are all-40 dBm in the OAM information of the local optical module b; and the PD monitoring value of the corresponding wave channel of the local side optical module b is-40 dBm.
Therefore, by combining OAM information and PD monitoring optical power values, a set of alarm dyeing logic capable of more accurately determining fault points is defined, and the alarm dyeing logic can be visually and visually presented on a network management operation and maintenance monitoring interface, so that remote intelligent operation and maintenance can be realized.
In summary, the embodiments of the present invention provide a fronthaul optical module WDM system and a fronthaul optical module WDM network management method, where the split determination of each branch is added to the break point fault determination logic of a main link, so as to solve the risk of network management misreading caused by reflection return loss of a semi-active office end only through trunk split determination, and simultaneously avoid that far-end incoming light is reduced to trigger a main link switching threshold due to a fault of a certain part of optical modules in all remote optical modules, thereby eliminating the risk of mis-switching when the main link is intact; the reserved cascade expansion interface and the OTDR monitoring interface are added on a system hardware architecture, the cascade of the same type/different type service/function board cards can be supported, the function expansibility and compatibility of equipment are improved, the corresponding service board cards can be added on the premise of not disconnecting the original service board cards along with the increase of services, the OTDR and other monitoring function board cards can be supported, the user investment can be effectively protected, and a method for providing remote fault-removing positioning is supported; a set of alarm dyeing processing logic is provided, based on OAM signals and PD monitoring values analyzed by the semi-active local side optical module, the position of a fault point of the optical module or each link can be remotely and accurately judged, and the alarm dyeing processing logic is visually and visually presented on a network management operation and maintenance monitoring interface, so that remote intelligent operation and maintenance can be realized.
The third embodiment of the present invention also provides an electronic device, for example, including: the electronic device comprises at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, when the computer program is executed by the processing unit, the processing unit executes the method according to the first embodiment, and the electronic device provided by the embodiment has the same beneficial effect as the fronthaul optical module WDM method provided by the second embodiment.
The fourth embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the above method. Wherein the computer readable storage medium may include, but is not limited to, any type of disk including floppy disks, optical disks, DVDs, CD-ROMs, microdrive, and magneto-optical disks, ROMs, RAMs, EPROMs, EEPROMs, DRAMs, VRAMs, flash memory devices, magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of media or device suitable for storing instructions and/or data, and the present embodiment provides the same advantageous effects as the fronthaul optical module method provided by the second embodiment.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some service interfaces, indirect coupling or communication connection of devices or units, and may be electrical or in other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.
The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solutions of the present application, in essence or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned memory comprises: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by a program which instructs associated hardware to perform the steps, and the program may be stored in a computer readable memory, and the memory may include: flash disks, read-Only memories (ROMs), random Access Memories (RAMs), magnetic or optical disks, and the like.
The above description is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure should not be limited thereby. That is, all equivalent changes and modifications made in accordance with the teachings of the present disclosure are intended to be included within the scope of the present disclosure. Embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A fronthaul optical module WDM system, comprising:
a plurality of remote optical modules;
the passive WDM module comprises a far-end wavelength-division multiplexing unit and is used for multiplexing or splitting light transmitted between a plurality of passive light branches corresponding to a plurality of far-end optical modules and a light main link;
a plurality of local optical modules; and
an active WDM module comprising:
a near-end wavelength multiplexing/demultiplexing unit, configured to multiplex or demultiplex light transmitted between the light main link and a plurality of active light branches corresponding to the plurality of local-end optical modules;
and the optical power monitoring unit is respectively connected with the light main link and the active light branches to perform light receiving monitoring.
2. The fronthaul optical module WDM system according to claim 1, wherein said near-end add/drop unit comprises:
and the OTDR monitoring interface is connected to the optical main link through a corresponding optical monitoring wave plate and is used for supporting connection of an OTDR functional board card and realizing OTDR fault monitoring.
3. A fronthaul optical module WDM system according to claim 2, wherein said near-end add/drop unit comprises:
at least two main light line optical interfaces respectively connected with at least two light line main links which are backed up mutually;
the MEMS optical switches are respectively connected to the at least two main link optical interfaces and used for switching and connecting to the standby light main link when a protection switching condition is triggered;
the plurality of branch optical interfaces are respectively connected with the corresponding light branches;
the light splitting wave plates and the light receiving wave plates are sequentially connected to the MEMS optical switch in a cascade mode and are used for receiving main link light, separating the main link light according to wavelength and then sending the main link light to the corresponding branch optical interface, or receiving a plurality of branch light with corresponding wavelength and then sending the branch light to the light main link;
and the plurality of light splitting detectors are respectively connected with the main link optical interfaces and the branch optical interfaces and are used for detecting the optical power of the corresponding light main link and the light branch.
4. The fronthaul optical module WDM system according to claim 3, wherein said near-end add/drop unit further comprises:
and the cascade expansion interface is cascaded with the plurality of light splitting wave plates and the plurality of light combining wave plates together and is used for supporting the cascade access of a service board card comprising a plurality of light branches.
5. The fronthaul optical module WDM system according to claim 4, wherein said OTDR function board comprises: the OTDR module and the MEMS optical switch connected with the OTDR module; and the plurality of service board cards are respectively connected to the MEMS optical switch after being cascaded through the respective cascade expansion interfaces, so that the OTDR monitoring interfaces of the service board cards share the OTDR functional board card, and fault monitoring is performed on the service board cards.
6. A fronthaul optical module WDM network management method, adapted to the fronthaul optical module WDM system of any one of claims 1 to 5, comprising:
collecting optical power monitoring values of light coming from a far end at each light ray branch side of an active WDM module;
if the collected optical power monitoring values of all the optical branches of the active WDM module are all reduced to a preset threshold value, determining that a breakpoint exists in the current main link of the active WDM module, and executing protection switching to switch to a standby main link;
if the collected optical power monitoring value of any one optical line branch is not reduced to the preset threshold value, the current main link of the active WDM module is determined to be not damaged, and switching is not executed.
7. A fronthaul optical module WDM network management method according to claim 6, further comprising:
respectively analyzing OAM signals of a receiving light branch and a sending light branch of a local optical module of the active WDM module to obtain corresponding optical power monitoring values;
and judging the position of a fault point of an optical module or an optical link in the WDM system of the fronthaul optical module according to the optical power monitoring value.
8. A WDM network management method according to claim 6, wherein said determining a location of a fault point of an optical module or an optical link in the WDM system of the fronthaul optical module according to the optical power monitoring value comprises:
in OAM information of a local optical module, the local receiving optical power is-40 dBm, the transmitting optical power is normal, the remote receiving optical power and the remote transmitting optical power are-40 dBm, the optical power monitoring value of a channel corresponding to the remote optical module is-40 dBm, and the optical power monitoring value of the channel corresponding to the local optical module is normal, so that the transmitting link fault of the remote optical module is judged;
when the local end receiving and emitting power in the OAM information of the local end optical module is normal, the remote end emitting optical power is normal, the receiving optical power is-40 dBm, and the optical power monitoring values of channels corresponding to the remote end optical module and the local end optical module are normal, judging that a receiving link of the remote end optical module is in fault;
in OAM information of the local optical module, the local optical module transmits normal optical power and receives optical power of-40 dBm, the remote optical module receives and transmits optical power of-40 dBm, and the optical power monitoring value of a channel corresponding to the local optical module is normal, and then the main link is judged to be in fault;
in OAM information of a local optical module, if the local receiving optical power is-40 dBm and the transmitting optical power is normal, and the remote receiving and transmitting optical powers are-40 dBm, and the optical power monitoring value of a channel corresponding to the remote optical module is normal, judging that a receiving link of the local optical module has a fault;
and judging the fault of a transmitting link of the local optical module if the local receiving and light emitting power in the OAM information of the local optical module is-40 dBm, the remote receiving and light emitting power is-40 dBm and the optical power monitoring value of a corresponding channel of the local optical module is-40 dBm.
9. An electronic device, comprising at least one processing unit and at least one memory unit, wherein the memory unit stores a computer program that, when executed by the processing unit, causes the processing unit to perform the steps of the method of any one of claims 6-8.
10. A computer-readable storage medium, in which a computer program executable by an access authentication device is stored, which computer program, when run on the access authentication device, causes the access authentication device to carry out the steps of the method of any one of claims 6 to 8.
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