CN116016139A

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

Info

Publication number: CN116016139A
Application number: CN202310013718.3A
Authority: CN
Inventors: 满祥锟; 王泽林; 王光全; 马小梅; 谭艳霞; 董姗
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-04-25

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 equipment and storage medium

Technical Field

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

Background

After the optical transport network (Optical Transport Network, OTN) is upgraded to a network deployed based on optical service units (Optical Service Unit, OSU), the number of connections supported by OSU is thousands or tens of thousands, and under a single time slot of the branching unit (Optix DivisionUnit, ODU), the number of connections supported by OSU can reach 4 thousands at maximum.

For the mass connection, when the protection switching is triggered on a plurality of OSUs at the same time, the switching time is easy to be overlong, the data exchange is delayed, and the data transmission efficiency is reduced.

Disclosure of Invention

Therefore, the application provides a protection switching method and device, electronic equipment and storage medium, which solve the problem of how to improve the efficiency of the protection switching of the OSU service between the optical transmission devices.

In order to achieve the above object, a first aspect of the present application provides a protection switching method, including: 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.

In some optional embodiments, the protection switching of the OSU service is performed simultaneously on a plurality of optical service units OSU in the subnetwork connection protection group according to the alarm information, including: each OSU in the subnetwork connection protection group is processed as follows: under the condition that the protection switching triggering information exists in the alarm information, carrying out protection switching on the service carried out in the OSU; wherein a service signal is protected by a separate protecting entity.

In some alternative 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;

the port trigger information comprises signal loss information; the optical channel payload unit triggering information comprises frame loss information; the optical channel data unit triggering information comprises at least one of trace identifier mismatch, an alarm indication signal, an open connection indication and locking; the light converter unit trigger information includes at least one of signal loss, frame loss, multiframe loss, alarm indication signal, trace identifier mismatch, degradation, and trace identifier mismatch.

In some alternative embodiments, the protection switching of the traffic in the OSU includes: unidirectional protection switching is carried out on the service carried out in the OSU; or, bidirectional protection switching is performed on the service performed in the OSU.

In some alternative embodiments, bidirectional protection switching is performed on the traffic performed in the OSU, including: and according to the automatic protection switching protocol, bidirectional protection switching is carried out on the service carried out in the OSU.

In some alternative embodiments, the method further comprises: and performing protection switching on the destination end of the OSU service, and maintaining bridging on the source end of the OSU service.

In some optional embodiments, after the protection switching of the OSU service is performed on the plurality of optical service units OSU in the subnetwork connection protection group at the same time, the method further includes: and acquiring a protection switching result based on the preset configuration parameters.

In order to achieve the above object, a second aspect of the present application provides a protection switching device, including: the receiving module is configured to receive the alarm information sent by the service layer; the switching module is configured to perform protection switching of OSU services on a plurality of optical service units OSUs in the subnetwork connection protection group according to the alarm information; wherein each OSU service corresponds to a protection entity.

To achieve the above object, according to a third aspect of the present application, there is provided an electronic device including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores one or more computer programs executable by the at least one processor, one or more of the computer programs being executable by the at least one processor to enable the at least one processor to perform the protection switching method described above.

In order to achieve the above object, the present application provides, in a fourth aspect, a computer readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor/processing core, implements the above protection switching method.

According to the protection switching method and device, the electronic equipment and the storage medium, whether the service layer fails or not is determined by receiving the alarm information sent by the service layer, so that response to the corresponding alarm information is facilitated; the protection switching of the OSU service is carried out on a plurality of optical service units OSUs in the subnetwork connection protection group according to the alarm information without adding additional transmission devices, wherein each OSU service corresponds to one protection entity, so that the normal transmission of service data is ensured, the data transmission cost is reduced, and the protection switching is carried out on a plurality of OSUs at the same time, so that the protection switching efficiency is improved.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the disclosure, and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, without limitation to the disclosure. The above and other features and advantages will become more readily apparent to those skilled in the art by describing in detail exemplary embodiments with reference to the attached drawings, in which:

fig. 1 is a flow chart of a protection switching method provided in an embodiment of the present application.

Fig. 2 is a schematic frame structure of an OSU according to an embodiment of the present application.

Fig. 3 is a network structure based on OSU provided in an embodiment of the present application.

Fig. 4 is a schematic diagram of a standardized OSU frame format according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a protection switching process according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a protection switching process according to an embodiment of the present application.

Fig. 7 is a block diagram of a protection switching device according to an embodiment of the present application.

Fig. 8 is a block diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The electrical layer technology of optical transmission is undergoing a third generation of revolution: from active frequency locking technology (Pound Drever Hal l, PDH) for voice-oriented bearers, to OTN technology for data-oriented multi-service bearers, and flexible OSU containers for services. The OSU is a technology for accelerating the generation of problems of resource waste, insufficient flexibility and the like caused by the unmatched bandwidth of a special bearing line of an OTN, and has the maximum characteristics that a flexible Optical Service Unit (OSU) facing service is provided with the following characteristics:

1) The flexible container provided is as small as M level, and the single ODUk channel provides 4k connection capability; 2) The OSU introduces a cell structure and carries TPN identification, breaks the fixed position of the fixed TDM time slot, and brings flexibility to the service (adapting to the packet service, facing the future); 3) Meanwhile, the characteristics of the OTN hard pipeline are reserved: zero packet loss, safe isolation and stable time delay.

And, the number of connections supported by OSU is several thousand or tens of thousands, whereas under a single OSU slot, the number of connections supported by OSU can be up to 4 thousand. For the mass connection, when the protection switching is triggered on a plurality of OSUs at the same time, the switching time is easy to be overlong, the data exchange is delayed, and the data transmission efficiency is reduced.

In view of the foregoing, the present application provides a protection switching method and apparatus, an electronic device, and a storage medium, so as to solve the foregoing problems.

Fig. 1 is a 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 alarm information sent by a 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, according to the alarm information, protection switching of OSU service is performed on a plurality of optical service units OSU in the subnetwork connection protection group.

Wherein each OSU service corresponds to a protection entity. OSU is an efficient bearer in OTN networks for supporting megabit per second (Mbit/s) and beyond traffic, with a frame length of 192 bytes.

Fig. 2 is a schematic frame structure of an OSU according to an embodiment of the present application. As shown in fig. 2, the frame structure of the OSU includes overhead regions (e.g., regions that map OH, OSU PMOH regions, etc.) and OSU payload regions.

Customer traffic is first mapped into an OSU payload area, the overhead area provides the functions of the channel layer (PM overhead), tandem connection monitoring (TCM overhead) and the segment layer (SOH segment overhead), and OSU frames can be further mapped into OPU Payload Blocks (PB).

Wherein the overhead region may be used to map any of OH, OSU PMOH, OSU TCMOH, and OSU SOH.

The OSU provides path layer network functions (e.g., OSU traffic adaptation functions, OSU path layer overhead management monitoring functions, OSU cross-scheduling functions, OSU multiplexing to OPU functions, OSU lossless adjustment functions, OSU protection functions, etc.). The network of the OSU layer can be compatible with the network architecture of the existing OTN, can support mapping to a plurality of oduks, and supports connection of the end-to-end OSU path in each segment layer through TPN identification.

Fig. 3 is a network structure based on OSU provided in an embodiment of the present application. As shown in fig. 3, the OSU includes OSU frames #1, … …, OSU frame #c, where C is an integer greater than or equal to 1.

Mapping the OSU into an OSU frame and further mapping the OSU frame into an OSTU frame, wherein the OSTU frame comprises at most m OSTU frames, m being an integer greater than or equal to 1.

The ODU is formed by mapping the OSTUG frame to the OPU payload area, adding OPU OH, thereby constructing an ODU payload area, and combining the ODU OH. Thereby implementing different network hierarchies.

In this embodiment, by receiving the alarm information sent by the service layer, it is determined whether the service layer has a fault, so that the response to the corresponding alarm information is facilitated; the protection switching of the OSU service is carried out on a plurality of optical service units OSUs in the subnetwork connection protection group according to the alarm information without adding additional transmission devices, wherein each OSU service corresponds to one protection entity, so that the normal transmission of service data is ensured, the data transmission cost is reduced, and the protection switching is carried out on a plurality of OSUs at the same time, so that the protection switching efficiency is improved.

Fig. 4 is a schematic diagram of a standardized OSU frame format according to an embodiment of the present application. As shown in fig. 4, bytes 1 to 4 and 7 are general overhead,

bytes

5 and 6 are mapping overhead, and bytes 8 to 192 are payload area.

Wherein the general overhead includes: version number (VER), tributary Port Number (TPN), continuity Check (CV), frame Type (FT), tandem Connection Monitoring (TCM), path Monitoring (PM), and reserved overhead (RES).

In some optional embodiments, in step S102, performing protection switching on OSU services of a plurality of optical service units OSU in a subnetwork connection protection group according to alarm information simultaneously includes: each OSU in the subnetwork connection protection group is processed as follows: and under the condition that the protection switching triggering information exists in the alarm information, carrying out protection switching on the service carried out in the OSU.

Wherein a service signal is protected by a separate protecting entity. Wherein, because the alarm information is used for reflecting the abnormal condition of the equipment, when the alarm information has the protection switching trigger information, the protection switching of the service in the OSU is started.

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 Loss of Signal (LOS); the optical channel payload unit (OPU) trigger information includes frame loss information (e.g., frame and multiframe loss (Loss of Frame and Loss of Mult i Frame, lofam)).

The optical channel data unit (ODU PM) trigger information includes at least one of a trace identification Fu Shipei (Trace Identifier Mismatch, TIM), an alarm indication signal (Alarm Indicat ion 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 Loss of Signal (LOS), loss of Frame (LOF), loss of multiframe (Loss of Multi Frame, LOM) Loss, alarm indication Signal (Alarm Indication Signal, AIS), trace identification Fu Shipei (Trace Identifier Mi smatch, TIM), and Degradation (DEG).

By means of different triggering information sent by the service layer, the protection switching of OSU business can be triggered by a plurality of OSUs in the sub-network connection protection group, the speed of the protection switching is increased, and the processing efficiency of a fault link is improved.

The unidirectional protection switching means that only one end is affected to start switching, selectors at two ends work independently, and the unidirectional protection switching can protect two unidirectional faults on different connections in different directions, thereby being beneficial to reducing the operation complexity of switching.

Bidirectional protection switching refers to protection switching in both the affected and unaffected link directions, i.e. switching to the protection path. Thereby ensuring normal communication of the link.

The protection switching is implemented by an automatic protection switching protocol (Automat ic Protect ion Switching, APS), that is, under the control of APS protocol information, the protection switching is completed by a source end selector and a destination end selector of a protected domain, and even if a unidirectional failure occurs, the source end and the destination end have the same bridge and selector settings. So as to ensure the fast and accurate implementation of the protection switching.

The bridging is kept at the source end of the OSU service, so that the proportion of source end change after protection switching can be reduced, and transmission errors of service data can be reduced. And by carrying out protection switching on the destination of the OSU service, the destination of the fault of the transmission link can be recovered as soon as possible, and the normal transmission of the service data is ensured.

In some optional embodiments, after the protection switching of the OSU service is performed on the plurality of optical service units OSU in the subnetwork connection protection group according to the alarm information in step S102, the method further includes: and acquiring a protection switching result based on the preset configuration parameters.

The preset configuration parameters comprise a returnable type and an unreveable type, and the preset configuration parameters can be configured by a user according to the use requirement of the user in advance.

By configuring in a returnable type, when the connection of the working path has a fault, and after the detection and confirmation are obtained, based on the implementation of protection switching, the new working path can be used for transmitting service data; at this time, the service data is transmitted by the protection link (i.e., a new working path), so that based on the protection switching result, the user knows that the service data is being reliably and orderly transmitted.

For the non-returnable 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 non-returnable type, if the link aging due to signal cracking or signal aging expiration is terminated, the working link enters a state of no request without an external start command, at which time the protection switching operation does not occur again. It is necessary to externally trigger whether the link is restored to a normal operating state (i.e., a state in which transmission of service data is performed).

Fig. 5 is a schematic diagram of a protection switching process according to an embodiment of the present application. As shown in fig. 5, a plurality of OSU services (for example, OSU service 1, OSU service 2, … …, OSU service N, N represents the number of OSU services, N is an integer greater than or equal to 1) are respectively connected to the working path and the protection path through OSU intersections.

The working path comprises a plurality of processing stages such as line interface processing, optical multiplexing section processing, line interface processing and the like; similarly, the protection path is basically the same as the working path, and also includes a plurality of processing stages such as line interface processing, optical multiplexing section processing, and line interface processing.

At the receiving end, mapping is carried out on the OSU with a plurality of OSU services in an OSU crossing mode, so that parallel processing of the plurality of OSU services is realized.

The working path is to construct a Sub-network connection protection (Sub-network Connection Protect ion, SNCP) group by binding a plurality of OSU services, and the SNCP protection group can support parallel processing of N services at most.

Wherein when the alarm information sent by the service layer is received, the alarm information is analyzed to determine that the alarm information has protection switching trigger information, at this time, the protection switching is performed on the services in the OSU based on the protection switching trigger information, the essence of the protection switching is to perform protection switching on the OSU services,

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

It should be noted that the protection switching supports the following modes: unidirectional protection switching is carried out on the service carried out in the OSU; or, bidirectional protection switching is performed on the service performed in the OSU. Correspondingly, the returned data support two operation types, namely returnable and non-returnable, and the operation types can be configured by a user according to the use requirement of the user in advance.

The returnable type refers to that after the reason causing the switching is cleared, the service is recovered to the working link for transmission. In the case of the returnable type, when the working link has a failure, and after the detection confirmation is obtained, the switching operation is completed, at this time, the service signal is transmitted by the protection link, after a period of time, the failure of the working link has been cleared, and the previous local switching request has been terminated, and the state is entered into the waiting recovery state. After this state is over, a no request state is entered, at which time the traffic signal is reversed back to the working link. But during the wait for recovery state, if there is a higher priority request, the wait for recovery state is terminated early.

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

When bidirectional protection switching is performed on the service performed in the OSU, bidirectional protection switching may be performed on the service 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 of protection switching, and table 1 shows the protection switching trigger condition of the SNCP group in the embodiment of the present application.

Table 1 protection switching trigger conditions for SNCP groups

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

Fig. 6 is a schematic diagram of a protection switching process according to an embodiment of the present application. As shown in fig. 6, based on the interface adaptation process a, a data interface of a certain OSU service is obtained, and the OSU service is connected with two identical transmission paths (for example, a first transmission path including processing stages of the line interface process 1, the optical multiplexing section process 1, the line interface process 1, and the like, and a second transmission path including the line interface process 2, the optical multiplexing section process 2, and the line interface process 2) respectively in a manner of intersecting the OSU.

At the receiving end, mapping is carried out on the OSU business by the interface adaptation processing B again in an OSU crossing mode, and therefore transmission of the OSU business is achieved.

It should be noted that the first transmission path and the second transmission path may be protection paths, and when one of the transmission paths fails, the other transmission path is adopted for transmission.

And the protection switching is performed at the destination end of the OSU service, and bridging is maintained at the source end of the OSU service. An OSU service shares a protected OSU resource

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

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

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

Table 2osu1+1 triggering condition of protection switching mode

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Fig. 7 is a block diagram of a protection switching device according to 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 perform protection switching of OSU services on a plurality of optical service units OSU in the subnetwork connection protection group at the same time according to the alarm information.

Wherein 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 one embodiment of the present application, which is not described herein again.

In the embodiment, the receiving module receives the alarm information sent by the service layer to determine whether the service layer fails, so that the corresponding alarm information can be responded conveniently; the protection switching of the OSU service is carried out simultaneously by using the switching module according to the alarm information for a plurality of optical service units OSU in the subnetwork connection protection group without adding additional transmission devices, wherein each OSU service corresponds to one protection entity, thereby not only ensuring the normal transmission of service data, but also reducing the transmission cost of the data, and simultaneously carrying out the protection switching on a plurality of OSUs, and improving the efficiency of the protection switching.

It should be noted that each module in this embodiment is a logic module, and in practical application, one logic unit may be one physical unit, or may be a part of one physical unit, or may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, elements that are not so close to solving the technical problem presented in the present application are not introduced in the present embodiment, but it does not indicate that other elements are not present in the present embodiment.

The embodiment of the application also provides an electronic device and a computer readable storage medium, and the above may be used to implement any protection switching method in the embodiment of the application, and the corresponding technical schemes and descriptions and corresponding records referring to method parts are not repeated.

Fig. 8 is a block diagram of an electronic device according to an embodiment of the present application. As shown in fig. 8, an embodiment of the present application provides an electronic device, including: at least one processor 801; at least one memory 802, and one or more I/O interfaces 803, coupled between the processor 801 and the memory 802; the memory 802 stores one or more computer programs executable by the at least one processor 801, and the one or more computer programs are executed by the at least one processor 801 to enable the at least one processor 801 to perform the protection switching method described above.

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

The embodiments of the present application also provide a computer program product, which includes a computer readable code, or a non-volatile computer readable storage medium carrying the computer readable code, and when the computer readable code runs in a processor of an electronic device, the processor in the electronic device executes the protection switching method described above.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable 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, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer-readable storage media, which may include computer storage media (or non-transitory media) and communication media (or transitory media).

The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable program instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is 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 disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical disc storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable program instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and may include any information delivery media.

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

Computer program instructions for performing the operations of the present application may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smal ltalk, c++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions may be executed entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the present application are implemented by personalizing electronic circuitry, such as programmable logic circuitry, field Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), with state information for computer readable program instructions, which may execute the computer readable program instructions.

The computer program product described herein may be embodied in hardware, software, or a combination thereof. In an alternative embodiment, the computer program product is embodied as a computer storage medium, and in another alternative embodiment, the computer program product is embodied as a software product, such as a software development kit (Software Development Kit, SDK), or the like.

Various aspects of the present application are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.

These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer readable program instructions may also be stored in a computer readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer readable medium having the instructions stored therein includes an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.

The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, it will be apparent to one skilled in the art that features, characteristics, and/or elements described in connection with a particular embodiment may be used alone or in combination with other embodiments unless explicitly stated otherwise. It will therefore be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present application as set forth in the following claims.

Claims

1. A protection switching method, the method comprising:

receiving alarm information sent by a service layer;

according to the alarm information, simultaneously carrying out protection switching on OSU services on a plurality of optical service units OSUs in a subnetwork connection protection group;

wherein each OSU service corresponds to a protection entity.

2. The method of claim 1, wherein the performing protection switching of OSU services on the plurality of optical service units OSU in the subnetwork connection protection group according to the alarm information includes:

each OSU in the subnetwork connection protection group is processed as follows:

under the condition that the alarm information is determined to have protection switching trigger information, carrying out protection switching on the service carried out in the OSU; wherein a service signal is protected by a separate protecting entity.

3. The method of claim 2, wherein 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 loss of signal information; the optical channel payload unit triggering information comprises frame loss information;

the optical channel data unit triggering information comprises at least one of trace identifier mismatch, an alarm indication signal, an open connection indication and locking;

the light converter unit trigger information includes at least one of signal loss, frame loss, multiframe loss, alarm indication signal, trace identifier mismatch, degradation, and trace identifier mismatch.

4. The method of claim 2, wherein the protection switching of the traffic in the OSU comprises:

unidirectional protection switching is carried out on the service carried out in the OSU;

or, bidirectional protection switching is carried out on the service carried out in the OSU.

5. The method of claim 4, wherein the bidirectional protection switching of the traffic in the OSU comprises:

and according to an automatic protection switching protocol, bidirectional protection switching is carried out on the service carried out in the OSU.

6. The method according to any one of claims 1-5, further comprising:

and performing the protection switching on the destination end of the OSU service, and maintaining bridging on the source end of the OSU service.

7. The method according to any one of claims 1-5, wherein after the protection switching of OSU services is performed simultaneously by a plurality of optical service units OSU in the subnetwork connection protection group, the method further includes:

and acquiring a protection switching result based on the preset configuration parameters.

8. A protection switching device, comprising:

the receiving module is configured to receive the alarm information sent by the service layer;

the switching module is configured to perform protection switching of an OSU service on a plurality of optical service units OSUs in the subnetwork connection protection group according to the alarm information;

wherein each OSU service corresponds to a protection entity.

9. An electronic device, comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,,

the memory stores one or more computer programs executable by the at least one processor to enable the at least one processor to perform the protection switching method of any one of claims 1-7.

10. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the protection switching method according to any of claims 1-7.