CN116016139A - Protection switching method and device, electronic equipment and storage medium - Google Patents

Abstract

The application discloses a protection switching method and device, electronic equipment and a storage medium, and relates to the technical field of optical transmission. The method comprises the following steps: receiving alarm information sent by a service layer; according to the alarm information, simultaneously carrying out protection switching on OSU services of a plurality of optical service units OSUs in the subnetwork connection protection group; wherein each OSU service corresponds to a protection entity. The normal transmission of service data is ensured, the transmission cost of the data can be reduced, and the protection switching is performed on a plurality of OSUs simultaneously, so that the efficiency of the protection switching can be improved.

Description

Protection switching method and device, electronic device, and storage medium

Technical Field

The present application relates to the field of optical transmission technology, and in particular to a protection switching method and device, an electronic device, and a storage medium.

Background Art

After the Optical Transport Network (OTN) is upgraded to a network deployed based on the Optical Service Unit (OSU), the number of connections supported by the OSU is several thousand or tens of thousands, and in a single Optix Division Unit (ODU) time slot, the maximum number of connections supported by the OSU can reach 4,000.

For the above-mentioned massive connections, when protection switching is triggered for multiple OSUs at the same time, it is easy to cause the switching time to be too long, delay the data exchange, and reduce the data transmission efficiency.

Summary of the invention

To this end, the present application provides a protection switching method and device, an electronic device, and a storage medium to solve the problem of how to improve the efficiency of protection switching of OSU services between optical transmission devices.

In order to achieve the above-mentioned objectives, the first aspect of the present application provides a protection switching method, the method comprising: receiving alarm information sent by the service layer; performing protection switching of OSU services on multiple optical service units OSU in a subnet connection protection group at the same time according to the alarm information; wherein each OSU service corresponds to a protection entity.

In some optional embodiments, protection switching of OSU services is simultaneously performed on multiple optical service units OSU in a subnet connection protection group based on alarm information, including: performing the following processing on each OSU in the subnet connection protection group: when it is determined that there is protection switching trigger information in the alarm information, protection switching is performed on the service performed in the OSU; wherein a service signal is protected by a separate protection entity.

In some optional embodiments, the protection switching trigger information includes: at least one of port trigger information, optical channel payload unit trigger information, optical channel data unit trigger information, and optical converter unit trigger information;

Among them, the port trigger information includes signal loss information; the optical channel payload unit trigger information includes frame loss information; the optical channel data unit trigger information includes at least one of a trace identifier mismatch, an alarm indication signal, an open connection indication and a lock; the optical converter unit trigger information includes at least one of a signal loss, a frame loss, a multi-frame loss, an alarm indication signal, a trace identifier mismatch, degradation and a trace identifier mismatch.

In some optional embodiments, protection switching is performed on the services performed in the OSU, including: unidirectional protection switching is performed on the services performed in the OSU; or bidirectional protection switching is performed on the services performed in the OSU.

In some optional embodiments, bidirectional protection switching is performed on the services performed in the OSU, including: performing bidirectional protection switching on the services performed in the OSU according to an automatic protection switching protocol.

In some optional embodiments, the method further includes: performing protection switching at the sink end of the OSU service and maintaining bridging at the source end of the OSU service.

In some optional embodiments, after simultaneously performing protection switching of OSU services on multiple optical service units OSU in the subnet connection protection group, the method further includes: obtaining a protection switching result based on preset configuration parameters.

In order to achieve the above-mentioned purpose, the second aspect of the present application provides a protection switching device, which includes: a receiving module, configured to receive alarm information sent by the service layer; a switching module, configured to simultaneously perform protection switching of OSU services for multiple optical service units OSU in a subnet connection protection group based on the alarm information; wherein each OSU service corresponds to a protection entity.

In order to achieve the above-mentioned purpose, in the third aspect of the present application, the present application provides an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores one or more computer programs that can be executed by the at least one processor, and one or more of the computer programs are executed by the at least one processor so that the at least one processor can execute the above-mentioned protection switching method.

In order to achieve the above-mentioned purpose, in a fourth aspect of the present application, the present application provides a computer-readable storage medium on which a computer program is stored, wherein the computer program implements the above-mentioned protection switching method when executed by a processor/processing core.

The protection switching method and device, electronic device, and storage medium in the present application receive alarm information sent by the service layer to determine whether a fault occurs in the service layer, so as to respond to the corresponding alarm information; there is no need to add additional transmission devices, and only the protection switching of OSU services of multiple optical service units OSU in the subnet connection protection group is performed simultaneously according to the alarm information, wherein each OSU service corresponds to a protection entity, which not only ensures the normal transmission of service data, but also reduces the data transmission cost, and the simultaneous protection switching of multiple OSUs can improve the efficiency of protection switching.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing detailed example embodiments with reference to the accompanying drawings, in which:

FIG1 is a schematic flow chart of a protection switching method provided in an embodiment of the present application.

FIG2 is a schematic diagram of a frame structure of an OSU provided in an embodiment of the present application.

FIG3 is an OSU-based network structure provided in an embodiment of the present application.

FIG4 is a schematic diagram of a standardized OSU frame format provided in an embodiment of the present application.

FIG5 is a schematic diagram of a protection switching process provided in an embodiment of the present application.

FIG6 is a schematic diagram of a protection switching process provided in an embodiment of the present application.

FIG. 7 is a block diagram of a protection switching device provided in an embodiment of the present application.

FIG8 is a block diagram of a composition of an electronic device provided in an embodiment of the present application.

DETAILED DESCRIPTION

The specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of the specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

In order to make the objectives, technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

The electrical layer technology of optical transmission is undergoing the third generation of transformation: from active frequency locking technology (Pound Drever Hal l, PDH) for voice bearer, to multi-service bearer OTN technology for data, and flexible OSU container for services. OSU is a technology that was born out of the problems of resource waste and lack of flexibility caused by bandwidth mismatch in OTN bearer dedicated lines. The biggest feature of this technology is the flexible optical service unit (OSU) for services, which has the following characteristics:

1) The flexible container provided is as small as M level, and a single ODUk channel provides 4k connection capabilities; 2) OSU introduces the cell structure and carries the TPN identifier, breaking the fixed position of the fixed TDM time slot and bringing flexibility to the service (adapting to packet services and facing the future); 3) At the same time, it retains the OTN hard pipe characteristics: zero packet loss, secure isolation, and stable latency.

In addition, the number of connections supported by OSU is several thousand or tens of thousands, while in a single OSU time slot, the maximum number of connections supported by OSU can reach 4,000. For the above massive connections, when protection switching is triggered for multiple OSUs at the same time, it is easy to cause the switching time to be too long, delaying data exchange and reducing data transmission efficiency.

In view of this, the present application provides a protection switching method and device, an electronic device, and a storage medium to solve the above-mentioned problems.

Fig. 1 is a schematic flow chart of a protection switching method provided in an embodiment of the present application. The protection switching method can be applied to a protection switching device. As shown in Fig. 1, the protection switching method includes but is not limited to the following steps.

Step S101, receiving the alarm information sent by the service layer.

The alarm information includes protection switching trigger information. For example, the protection switching trigger information includes at least one of port trigger information, optical channel payload unit trigger information, optical channel data unit trigger information, and optical converter unit trigger information.

Step S102: performing protection switching of OSU services on multiple optical service units OSU in the subnet connection protection group simultaneously according to the alarm information.

Each OSU service corresponds to a protection entity. OSU is an efficient bearer in the OTN network for supporting services with a rate of megabit per second (Mbit/s) or above, with a frame length of 192 bytes.

Fig. 2 is a schematic diagram of an OSU frame structure provided by an embodiment of the present application. As shown in Fig. 2, the OSU frame structure includes an overhead area (eg, an OH mapping area, an OSU PMOH area, etc.) and an OSU payload area.

Customer services are first mapped to the OSU payload area. The overhead area provides channel layer (PM overhead), tandem connection monitoring (TCM overhead) and segment layer (SOH segment overhead) functions. In addition, the OSU frame can be further mapped to the OPU payload block (PB).

The overhead area may be used to map any one of OH, OSU PMOH, OSU TCMOH and OSU SOH.

OSU provides network functions at the path layer (such as OSU service adaptation function, OSU path layer overhead management and monitoring function, OSU cross-scheduling function, OSU multiplexing to OPU function, OSU lossless adjustment function, OSU protection function, etc.). The network at the OSU layer is compatible with the existing OTN network architecture, can support mapping to multiple ODUks, and support the connection of end-to-end OSU paths in each segment layer through TPN identification.

FIG3 is a network structure based on OSU provided in an embodiment of the present application. As shown in FIG3, OSU includes OSU frame #1, ..., OSU frame #C, where C is an integer greater than or equal to 1.

The OSU is mapped into an OSTU frame, and further, the OSTU frame is mapped into an OSTUG frame, wherein the OSTUG frame includes at most m OSTU frames, and m is an integer greater than or equal to 1.

By mapping the OSTUG frame to the OPU payload area, and adding the OPU OH, the ODU payload area is constructed, and then combined with the ODUOH to form the ODU, thereby realizing different network hierarchical structures.

In this embodiment, the alarm information sent by the service layer is received to determine whether the service layer fails, so as to respond to the corresponding alarm information. There is no need to add additional transmission devices, and only the protection switching of OSU services of multiple optical service units OSU in the subnet connection protection group is performed simultaneously according to the alarm information. Each OSU service corresponds to a protection entity, which not only ensures the normal transmission of service data, but also reduces the data transmission cost. In addition, simultaneous protection switching of multiple OSUs can improve the efficiency of protection switching.

Fig. 4 is a schematic diagram of a standardized OSU frame format provided by an embodiment of the present application. As shown in Fig. 4, bytes 1 to 4 and 7 are general overheads, bytes 5 and 6 are mapping overheads, and bytes 8 to 192 are payload areas.

The common overhead includes: version number (VER), tributary port number (TPN), continuity check (CV), frame type (FT), tandem connection monitor (TCM), path monitor (PM) and reserved overhead (RES).

In some optional embodiments, step S102 simultaneously performs protection switching of OSU services on multiple optical service units OSU in the subnet connection protection group based on the alarm information, including: performing the following processing on each OSU in the subnet connection protection group: when it is determined that there is protection switching trigger information in the alarm information, performing protection switching on the service performed in the OSU.

One service signal is protected by a separate protection entity. Since the alarm information is used to reflect the abnormal situation of the equipment, protection switching of the service in the OSU is initiated only when there is protection switching triggering information in the alarm information.

For example, the protection switching trigger information includes at least one of port trigger information, optical channel payload unit trigger information, optical channel data unit trigger information, and optical converter unit trigger information.

For example, the port trigger information includes signal loss information (Loss of Signal, LOS); the optical channel payload unit (OPU) trigger information includes frame loss information (such as frame and multiframe loss (Loss of Frame and Loss of Mult iFrame, LOFLOM)).

The optical channel data unit (ODU PM) trigger information includes at least one of a trace identifier mismatch (Trace Identifier Mismatch, TIM), an alarm indication signal (Alarm Indication Signal, AIS), an open connection indication (Open Connection Indication, OCI) and a lock (Lock, LCK).

The optical converter unit (OTU) trigger information includes at least one of signal loss (Loss of Signal, LOS), frame loss (Loss of Frame, LOF), multi-frame loss (Loss of Multi Frame, LOM), alarm indication signal (Alarm Indication Signal, AIS), trace identifier mismatch (Trace Identifier Mi smatch, TIM), and degradation (Degrade, DEG).

Different trigger information sent by the above service layer can trigger protection switching of OSU services of multiple OSUs in the subnet connection protection group at the same time, thereby accelerating the speed of protection switching and improving the processing efficiency of faulty links.

In some optional embodiments, protection switching is performed on the services performed in the OSU, including: unidirectional protection switching is performed on the services performed in the OSU; or bidirectional protection switching is performed on the services performed in the OSU.

Among them, unidirectional protection switching means that only the affected end starts switching, and the selectors at both ends work independently. The unidirectional protection switching can protect two unidirectional faults on different connections in different directions, which is conducive to reducing the complexity of switching operations.

Bidirectional protection switching means that protection switching is performed in both the affected and unaffected link directions, that is, switching to the protection path, thereby ensuring normal communication of the link.

In some optional embodiments, bidirectional protection switching is performed on the services performed in the OSU, including: performing bidirectional protection switching on the services performed in the OSU according to an automatic protection switching protocol.

Among them, the protection switching is realized through the Automatic Protection Switching (APS) protocol, that is, under the control of the APS protocol information, the protection switching is completed by the source selector and the sink selector of the protected domain. Even in the case of a unidirectional fault, the source and sink will have the same bridge and selector settings to ensure the fast and accurate implementation of the protection switching.

In some optional embodiments, the method further includes: performing protection switching at the sink end of the OSU service and maintaining bridging at the source end of the OSU service.

Among them, by maintaining the bridge at the source end of the OSU service, the proportion of source end changes after protection switching can be reduced, and the transmission errors of service data can be reduced. In addition, by performing protection switching at the destination end of the OSU service, the destination end with a transmission link failure can be restored as soon as possible, ensuring the normal transmission of service data.

In some optional embodiments, after simultaneously performing protection switching of OSU services on multiple optical service units OSU in the subnet connection protection group according to the alarm information in step S102, the method further includes: obtaining a protection switching result based on preset configuration parameters.

The preset configuration parameters include a returnable type and a non-returnable type, and the preset configuration parameters can be configured in advance by the user according to his/her usage requirements.

Under the configuration of the returnable type, when there is a fault in the connection of the working path, and after detection confirmation, based on the implementation of protection switching, the new working path can be used to transmit business data; at this time, the business data is transmitted by the protection link (that is, the new working path), so that based on the protection switching result, the user knows that the business data is being transmitted reliably and orderly.

For the irreversible type, when the protection switching request is terminated, the service data will not be switched back to the original working link, but will continue to be transmitted on the protection link. In the case of the irreversible type, if the link validity period is terminated due to signal cracking or signal validity expiration, the working link enters a no-request state without an external start command, and the protection switching operation will not occur again. An external trigger is required to determine whether the link is restored to a normal working state (i.e., a state of transmitting service data).

Figure 5 is a schematic diagram of a protection switching process provided by an embodiment of the present application. As shown in Figure 5, multiple OSU services (such as OSU service 1, OSU service 2, ..., OSU service N, N represents the number of OSU services, and N is an integer greater than or equal to 1) are connected to the working path and the protection path respectively through the OSU crossover.

Among them, the working path includes multiple processing stages such as line interface processing, optical multiplex section processing, optical multiplex section processing and line interface processing; similarly, the protection path is basically the same as the working path, and also includes multiple processing stages such as line interface processing, optical multiplex section processing, optical multiplex section processing and line interface processing.

At the receiving end, multiple OSU services are mapped through OSU cross-connection, thereby realizing parallel processing of multiple OSU services.

The working path is constructed by bundling multiple OSU services to form a sub-network connection protection (SNCP) group, and the SNCP protection group can support parallel processing of up to N types of services.

When receiving the alarm information sent by the service layer, the alarm information is parsed to determine that there is protection switching trigger information in the alarm information. At this time, protection switching is performed on the service in the OSU based on the protection switching trigger information. The essence of the protection switching is to perform protection switching on the OSU service.

Furthermore, when the protection switching is executed, the protection switching of OSU services is performed on multiple OSUs in the SNCP group at the same time. A single working signal is protected by a single protection entity. Furthermore, the protection switching is performed at the sink end of the OSU service, and the bridging is maintained at the source end of the OSU service.

It should be noted that protection switching supports the following modes: unidirectional protection switching for services in OSU; or bidirectional protection switching for services in OSU. Correspondingly, the returned data supports two types of operation: returnable and non-returnable. The operation type can be configured by the user in advance according to his/her usage requirements.

Among them, the revertible type means that after the cause of the switch is cleared, the service will be restored to the working link for transmission. In the case of the revertible type, when a fault occurs in the working link, and the switch action is completed after detection confirmation, the service signal is transmitted by the protection link. After a period of time, the fault of the working link has been cleared, and the previous local switch request has been terminated, and it enters the waiting for recovery state. After this state ends, it enters the no request state, and the service signal switches back to the working link. However, during the waiting for recovery state, if there is a request with a higher priority, the waiting for recovery state will be ended in advance.

The non-returnable type means that when the switching request is terminated, the service signal will not be switched back to the working link, but will continue to be transmitted on the protection link.

For the irreversible type, when the protection switching request is terminated, the service data will not be switched back to the original working link, but will continue to be transmitted on the protection link. In the case of the irreversible type, if the link validity period is terminated due to signal cracking or signal validity expiration, the working link enters the no-request state without an external start command, and the protection switching operation will not occur again. An external trigger is required to determine whether the link is restored to a normal working state (i.e., a state of transmitting service data).

When bidirectional protection switching is performed on the services performed in the OSU, bidirectional protection switching can be performed on the services performed in the OSU according to the APS protocol.

In some specific implementations, the protection switching trigger information may be used as a trigger condition for protection switching. Table 1 shows the protection switching trigger condition of the SNCP group in the embodiment of the present application.

Table 1 Protection switching triggering conditions of SNCP group

In some specific implementations, an OSU 1+1 protection switching mode may be used to protect OSU services.

FIG6 is a schematic diagram of a protection switching process provided by an embodiment of the present application. As shown in FIG6, based on the interface adaptation process A, a data interface of a certain OSU service is obtained, and the OSU service is connected to two identical transmission paths (e.g., a first transmission path including processing stages such as line interface processing 1, optical multiplex section processing 1, optical multiplex section processing 1, and line interface processing 1; and a second transmission path including line interface processing 2, optical multiplex section processing 2, optical multiplex section processing 2, and line interface processing 2) through OSU crossover.

At the receiving end, the OSU cross-connection method is used and the interface adaptation processing B is used again to map the OSU service, thereby realizing the transmission of the OSU service.

It should be noted that the first transmission path and the second transmission path can serve as protection paths for each other. When one of the transmission paths fails, the other transmission path will be used for transmission.

Furthermore, the protection switching is performed at the destination of the OSU service, and the bridging is maintained at the source of the OSU service. One OSU service exclusively uses one protection OSU resource.

It should be noted that protection switching supports the following modes: unidirectional protection switching for services in OSU; or bidirectional protection switching for services in OSU. Correspondingly, the returned data supports two types of operation: returnable and non-returnable. The operation type can be configured by the user in advance according to his/her usage requirements.

When bidirectional protection switching is performed on the services performed in the OSU, bidirectional protection switching may be performed on the services performed in the OSU according to an Automatic Protection Switching (APS) protocol.

It should be noted that the triggering conditions of the protection switching mode of OSU 1+1 depend on different monitoring types. Table 2 shows the triggering conditions of the protection switching mode of OSU 1+1 in the embodiment of the present application.

It should be noted that, after the corresponding subsequent operation is enabled, the TIM/PLM/LTC condition can be used as the protection switching condition of OSU 1+1.

Table 2 Triggering conditions for OSU 1+1 protection switching mode

Fig. 7 is a block diagram of a protection switching device provided in an embodiment of the present application. As shown in Fig. 7, the protection switching device 700 includes but is not limited to the following modules.

The receiving module 701 is configured to receive the alarm information sent by the service layer.

The switching module 702 is configured to simultaneously perform protection switching of OSU services on multiple optical service units OSU in the subnet connection protection group according to the alarm information.

Each OSU service corresponds to a protection entity.

It should be noted that the protection switching device in the embodiment of the present application can implement the protection switching method in any embodiment of the present application, which will not be described in detail here.

In this embodiment, the alarm information sent by the service layer is received by the receiving module to determine whether a fault occurs in the service layer, so as to respond to the corresponding alarm information. There is no need to add additional transmission devices. Only the switching module needs to be used to simultaneously perform protection switching of OSU services for multiple optical service units OSU in the subnet connection protection group according to the alarm information. Each OSU service corresponds to a protection entity, which not only ensures the normal transmission of service data, but also reduces the data transmission cost. Moreover, simultaneous protection switching of multiple OSUs can improve the efficiency of protection switching.

It is worth mentioning that all modules involved in this embodiment are logic modules. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of this application, this embodiment does not introduce units that are not closely related to solving the technical problems proposed by this application, but this does not mean that there are no other units in this embodiment.

The embodiments of the present application also provide electronic devices and computer-readable storage media, which can be used to implement any protection switching method in the embodiments of the present application. The corresponding technical solutions and descriptions are referred to in the corresponding records of the method part and will not be repeated here.

FIG8 is a block diagram of an electronic device provided in an embodiment of the present application. As shown in FIG8, an embodiment of the present application provides an electronic device, which includes: at least one processor 801; at least one memory 802, and one or more I/O interfaces 803, connected between the processor 801 and the memory 802; wherein the memory 802 stores one or more computer programs that can be executed by at least one processor 801, and the one or more computer programs are executed by at least one processor 801, so that at least one processor 801 can perform the above-mentioned protection switching method.

The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, wherein the computer program implements the above protection switching method when executed by a processor/processing core. The computer-readable storage medium may be a volatile or non-volatile computer-readable storage medium.

An embodiment of the present application also provides a computer program product, including a computer-readable code, or a non-volatile computer-readable storage medium carrying the computer-readable code. When the computer-readable code runs in a processor of an electronic device, the processor in the electronic device executes the above-mentioned protection switching method.

It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules/units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable storage medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium).

As is known to those of ordinary skill in the art, the term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable program instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), flash memory or other memory technology, portable compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. In addition, it is known to those of ordinary skill in the art that communication media typically contain computer-readable program instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium.

The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing/processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and/or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and/or edge servers. The network adapter card or network interface in each computing/processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing/processing device.

The computer program instructions for performing the operation of the present application can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions can be executed completely on a user's computer, partially on a user's computer, executed as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet). In some embodiments, by using the state information of a computer-readable program instruction to personalize an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA), the electronic circuit can execute a computer-readable program instruction, thereby realizing various aspects of the present application.

The computer program product described herein may be implemented in hardware, software, or a combination thereof. In one optional embodiment, the computer program product is embodied as a computer storage medium, and in another optional embodiment, the computer program product is embodied as a software product, such as a software development kit (SDK), etc.

Various aspects of the present application are described herein with reference to the flowcharts and/or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each box in the flowchart and/or block diagram and the combination of each box in the flowchart and/or block diagram can be implemented by computer-readable program instructions.

These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions/actions specified in one or more boxes in the flowchart and/or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and/or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions/actions specified in one or more boxes in the flowchart and/or block diagram.

Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions/actions specified in one or more boxes in the flowchart and/or block diagram.

The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to multiple embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of the module, program segment or instruction includes one or more executable instructions for realizing the logical function of the specification. In some alternative implementations, the function marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the function involved. It should also be noted that each square box in the block diagram and/or flow chart, and the combination of the square boxes in the block diagram and/or flow chart can be realized by a special hardware-based system that performs the function or action of the specification, or can be realized by a combination of special hardware and computer instructions.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for limiting purposes. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly noted, features, characteristics, and/or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and/or elements described in conjunction with other embodiments. Therefore, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the scope of the present application as set forth in the appended claims.

Claims (10)

1. A protection switching method, characterized in that the method comprises: Receive alarm information sent by the service layer; Perform protection switching of OSU services on multiple optical service units OSU in the subnet connection protection group simultaneously according to the alarm information; Each of the OSU services corresponds to a protection entity. 2. The method according to claim 1, characterized in that the protection switching of OSU services of multiple optical service units (OSUs) in the subnet connection protection group is performed simultaneously according to the alarm information, comprising: Perform the following processing on each of the OSUs in the subnet connection protection group: When it is determined that the alarm information contains protection switching triggering information, protection switching is performed on the service in the OSU; wherein one service signal is protected by one separate protection entity. 3. The method according to claim 2, characterized in that the protection switching trigger information comprises: at least one of port trigger information, optical channel payload unit trigger information, optical channel data unit trigger information, and optical converter unit trigger information; Wherein, the port trigger information includes signal loss information; the optical channel payload unit trigger information includes frame loss information; The optical channel data unit trigger information includes at least one of a trace identifier mismatch, an alarm indication signal, an open connection indication, and a lock; The optical converter unit trigger information includes at least one of signal loss, frame loss, multi-frame loss, alarm indication signal, trace identifier mismatch, degradation and trace identifier mismatch. 4. The method according to claim 2, wherein the performing protection switching on the service in the OSU comprises: Performing unidirectional protection switching on the services carried out in the OSU; Or, bidirectional protection switching is performed on the services performed in the OSU. 5. The method according to claim 4, characterized in that the bidirectional protection switching of the service performed in the OSU comprises: According to the automatic protection switching protocol, bidirectional protection switching is performed on the services performed in the OSU. 6. The method according to any one of claims 1 to 5, characterized in that the method further comprises: The protection switching is performed at the sink end of the OSU service, and the bridging is maintained at the source end of the OSU service. 7. The method according to any one of claims 1 to 5, characterized in that after the protection switching of OSU services of multiple optical service units (OSUs) in the subnet connection protection group is performed simultaneously, it also includes: Based on the preset configuration parameters, the protection switching result is obtained. 8. A protection switching device, comprising: A receiving module, configured to receive the alarm information sent by the service layer; A switching module is configured to simultaneously perform protection switching of OSU services on multiple optical service units OSU in the subnet connection protection group according to the alarm information; Each of the OSU services corresponds to a protection entity. 9. An electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores one or more computer programs that can be executed by the at least one processor, and the one or more computer programs are executed by the at least one processor so that the at least one processor can execute the protection switching method according to any one of claims 1 to 7. 10. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the protection switching method according to any one of claims 1 to 7.

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