CN102739308A - Recovery method for protection service in intelligent optical network - Google Patents

Recovery method for protection service in intelligent optical network Download PDF

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Publication number
CN102739308A
CN102739308A CN2012101919090A CN201210191909A CN102739308A CN 102739308 A CN102739308 A CN 102739308A CN 2012101919090 A CN2012101919090 A CN 2012101919090A CN 201210191909 A CN201210191909 A CN 201210191909A CN 102739308 A CN102739308 A CN 102739308A
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CN
China
Prior art keywords
port
recovery
protection
switching
protection group
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Pending
Application number
CN2012101919090A
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Chinese (zh)
Inventor
富森
卢鸿飞
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ZTE Corp
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ZTE Corp
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Priority to CN2012101919090A priority Critical patent/CN102739308A/en
Publication of CN102739308A publication Critical patent/CN102739308A/en
Priority to PCT/CN2013/077030 priority patent/WO2013185583A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/04—Network management architectures or arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/34—Signalling channels for network management communication
    • H04L41/344—Out-of-band transfers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention provides a recovery method for protection service in an intelligent optical network and relates to the field of intelligent optical networks; and the invention also solves the problem that the switching time under the GMPLS (Generalized Multiprotocol Label Switching) protocol is longer and the service is affected. The recovery method comprises the steps of: monitoring a switching recovery protection group constituted by a working port and a protection port; selecting a new port and establishing a path with the new port when the port in the switching recovery protection group is in fault; and replacing the fault port with the new port and updating the new port to the switching recovery protection group. The technical scheme provided by the invention is applicable to a WSON (Wavelength Switched Optical Network) and realizes the rapid switching and recovery under the GMPLS protocol.

Description

The professional recovery of protection in the ASON
Technical field
The present invention relates to the ASON field, relate in particular to the method and apparatus of the recovery of protection business in a kind of ASON.
Background technology
Optical transfer network (OTN) is faced with intelligent evolution, and its major technique wavelength-division control plane (WSON) is with the intelligent scheduling and the recovery that realize that OTN is professional.But different with IP operation is, through the business that the GMPLS agreement is recovered, can cause the service damage of 200ms-2s, and this damage can be accepted for IP operation, but for this big capacity bearer network of OTN, is that the user is unacceptable.
Therefore control plane need pass through traditional resist technology, and the professional survivability accepted is provided.In traditional protection, perhaps rely on 1+1 protection, perhaps rely on the ring share protect, the professional debatable time can both be realized less than 50ms, even the rank of 10ms might be reached.This is because traditional protection need not to rely on complicated general multiple protocols sign exchange agreement (GMPLS) agreement, only realizes professional switching through the few bytes in the traffic overhead.Switching and then need to recover the long period through the GMPLS agreement.
Summary of the invention
The invention provides the method and apparatus of the recovery of protection business in a kind of ASON, solved the longer traffic affecting problem of switching time under the GMPLS agreement.
The professional restoration methods of protection in a kind of ASON, this ASON uses the GMPLS agreement, and this method comprises:
That keeps watch on that a working port and a protection port constitute switches the recovery and protection group;
When the said port of switching in the recovery and protection group breaks down, select a new port, use this new port to set up the path;
Said new port is replaced the port of fault, be updated to the said recovery and protection group of switching.
Preferably, when the said port of switching in the recovery and protection group breaks down, be specially when the said working port of switching the recovery and protection group breaks down, the port that said selection one is new uses this new port to set up before the step in path, also comprises:
Trigger to start professional heavy-route, the working port of fault is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this.
Preferably, said new port is replaced the port of fault, is updated to the said recovery and protection group of switching and is specially:
Said new port as new working port, is added the said recovery and protection group of switching.
Preferably;, the said port of switching in the recovery and protection group is specially when breaking down when the said working port of switching the recovery and protection group all breaks down with the protection port; The port that said selection one is new uses this new port to set up before the step in path, also comprises:
Trigger to start professional heavy-route, the protection port of fault is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this.
Preferably, said new port is replaced the port of fault, is updated to the said recovery and protection group of switching and is specially:
Said new port as new protection port, is added the said recovery and protection group of switching.
Preferably,, be updated to after the said step of switching the recovery and protection group, also comprise the port of said new port replacement fault:
With the said switching services of switching the recovery and protection group to the corresponding path of said new protection port.
Preferably,, be updated to after the said step of switching the recovery and protection group, also comprise the port of said new port replacement fault:
After heavy-route is accomplished, start said supervision of switching the recovery and protection group.
The present invention also provides the professional recovery device of protection in a kind of ASON, and this ASON uses the GMPLS agreement, and this device comprises:
Detecting unit is used to keep watch on that a working port and a protection port constitute switches the recovery and protection group;
Control plane is used for when the said port of switching the recovery and protection group breaks down, and selects a new port, uses this new port to set up the path;
Protected location is used for said new port is replaced the port of fault, is updated to the said recovery and protection group of switching.
Preferably; Said control plane; Also be used to trigger the heavy-route that starts business, the working port with fault when the said working port of switching the recovery and protection group breaks down is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this; Or when the said working port of switching the recovery and protection group all breaks down with the protection port, the protection port of fault is removed by the said recovery and protection group of switching; And cancel this is switched the supervision of recovery and protection group, after heavy-route is accomplished, start said detecting unit to said supervision of switching the recovery and protection group.
Preferably, said protected location comprises:
First update module, be used for said control plane with the working port of fault by said switch the recovery and protection group when removing with said new port as new working port, add the said recovery and protection group of switching;
Second update module, be used for said control plane with the protection port of fault by said switch the recovery and protection group when removing with said new port as new protection port, add the said recovery and protection group of switching.
The invention provides professional restoration methods and the device of protection in a kind of ASON; That keeps watch on that a working port and a protection port constitute switches the recovery and protection group; When the said port of switching in the recovery and protection group breaks down, select a new port, use this new port to set up the path; Again said new port is replaced the port of fault; Be updated to the said recovery and protection group of switching, realized that 1+1 switches the replacement of recovery and protection group middle port, solved the longer traffic affecting problem of switching time under the GMPLS agreement.
Description of drawings
The structural representation of the recovery device of protection business in a kind of ASON that Fig. 1 provides for embodiments of the invention one;
Fig. 2 is the internal structure sketch map of protected location 103 among Fig. 1;
The operation principle sketch map of the recovery device of protection business in a kind of ASON that Fig. 3 provides for embodiments of the invention one;
The flow chart of the restoration methods of protection business in a kind of ASON that Fig. 4 provides for embodiments of the invention two;
Fig. 5 is the applied environment sketch map of embodiments of the invention three;
Network condition sketch map when Fig. 6 breaks down for path 1 in the embodiments of the invention three;
Fig. 7 is the applied environment sketch map of embodiments of the invention four;
Network diagram when Fig. 8 breaks down for path 1 in the embodiments of the invention four;
Network diagram when Fig. 9 all breaks down for path 1 and 2 in the embodiments of the invention four.
Embodiment
OTN is faced with intelligent evolution, and its major technique WSON is with the intelligent scheduling and the recovery that realize that OTN is professional.But different with IP operation is, through the business that the GMPLS agreement is recovered, can cause the service damage of 200ms-2s, and this damage can be accepted for IP operation, but for this big capacity bearer network of OTN, is that the user is unacceptable.
In order to address the above problem, embodiments of the invention provide professional restoration methods and the device of protection in a kind of ASON.Hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
At first combine accompanying drawing, embodiments of the invention one are described.
The embodiment of the invention provides the professional recovery device of protection in a kind of ASON, and this device uses GMPLS, and its structure is as shown in Figure 1, comprising:
Detecting unit 101 is used to keep watch on that a working port and a protection port constitute switches the recovery and protection group;
Control plane 102 is used for when the said port of switching the recovery and protection group breaks down, and selects a new port, uses this new port to set up the path;
Protected location 103 is used for said new port is replaced the port of fault, is updated to the said recovery and protection group of switching.
Preferably; Said control plane 102; Also be used to trigger the heavy-route that starts business, the working port with fault when the said working port of switching the recovery and protection group breaks down is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this; Or when the said working port of switching the recovery and protection group all breaks down with the protection port, the protection port of fault is removed by the said recovery and protection group of switching; And cancel this is switched the supervision of recovery and protection group, after heavy-route is accomplished, start said detecting unit to said supervision of switching the recovery and protection group.
Preferably, said protected location 103 is as shown in Figure 2, comprising:
First update module 1031, be used for said control plane with the working port of fault by said switch the recovery and protection group when removing with said new port as new working port, add the said recovery and protection group of switching;
Second update module 1032, be used for said control plane with the protection port of fault by said switch the recovery and protection group when removing with said new port as new protection port, add the said recovery and protection group of switching.
The recovery device operation principle of protection business is as shown in Figure 3 in the ASON that the embodiment of the invention provides:
Control plane 102 is protected port for service port distributes a working port, when foundation band protection attribute is professional, and according to the establishment protected location 103 of port on the transmission plane.
When the business of control plane 102 was in unactivated state, protected location 103 was in frozen state; When business was in state of activation, protected location 103 was in the releasing frozen state.
The business of control plane 102 and protected location 103 shared identical detecting units 101 are by the operating state of control plane 102 control detection unit 101;
Detecting unit 101 operating states comprise opens supervision, cancellation supervision; Opening under the monitored state, detecting unit 101 initiatively report and alarm produces and alarm disappearance message, and according to detected state inquiry is replied; Under the cancellation monitored state, report and alarm disappearance message initiatively, and only reply alarm disappearance message for inquiry.
The professional recovery device of protection can comprise a plurality of detecting units 101 in the ASON, has respectively had independently detecting unit 101 like working port and protection port.
After detecting unit 101 report and alarms of working port and/or protection port produced, professional switching carried out at first trigger protection unit 103 work.Trigger control plane 102 then and start professional heavy-route, reselect a new work/protection port, and set up the path; After setting up successfully working port of reselecting and protection port are upgraded to protected location 103;
When the initiation of services rerouting recovering, need cancel the alarm monitoring of professional original working port and/or protection port simultaneously; After rerouting recovering is accomplished, keep watch on working port and/or protection port after upgrading again.
In protected location 103 renewal processes, need control plane 102 control protected locations 103 orders to operate as follows:
1, freeze protection unit;
2, upgrade the working port and/or the protection port of protected location;
3, remove the freeze protection unit, and detect working port and/or protection port after upgrading again;
4, work at present and protection port status, the execute protection action.
After control plane 102 deletion business, need the protected location 103 on the plane of deletion transmission simultaneously, and simultaneously the work and the cancellation of protection port of business are kept watch on.
Below in conjunction with accompanying drawing, embodiments of the invention two are described.
The embodiment of the invention provides the professional restoration methods of protection in a kind of ASON, and it is as shown in Figure 4 to use this method in WSON, to accomplish the professional flow process of protection, comprising:
Step 401, keep watch on that a working port and a protection port constitute switch the recovery and protection group;
In the embodiment of the invention, a working port and a protection port constitute one and switch the recovery and protection group, the corresponding operating path of working port, the corresponding protection of protection port path.
Step 402, when the said port of switching in the recovery and protection group breaks down, trigger to start professional heavy-route;
In this step, when switching the working port fault of recovery and protection group, the working port of fault is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this; At the working port of switching the recovery and protection group during, the protection port of fault is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this with protection port equal fault.
Step 403, select a new port, use this new port to set up the path;
Step 404, with the port of said new port replacement fault, be updated to the said recovery and protection group of switching;
In this step,, be updated to this and switch in the recovery and protection group switching the port that the recovery and protection group removes from this in the new port replacement step 402.With new port during as new protection port; Because working port and protection port equal fault in such cases; So after will this new port being updated to the protection group, need this business datum of switching the recovery and protection group is switched to the corresponding path of this new port.
Step 405, after heavy-route is accomplished, start said supervision of switching the recovery and protection group.
Below in conjunction with accompanying drawing, embodiments of the invention three are described.
The embodiment of the invention is with among the OTN, and control plane management 1+1 diamond attribute (permanent 1+1) business describes for example.
The applied environment of the embodiment of the invention is as shown in Figure 5, and control plane is disposed the permanent 1+1 protection attribute business of an ODU1 between A, two websites of B.Control plane selects A-2 and B-2 as working port, selects A-3 and B-3 as the protection port.
Set up protected location at A, B node, and the detecting unit that 2 and 3 ports are set is opened supervision.
As shown in Figure 6, after breaking down in path 1, at first the detection of port 2 singly reports fault generating, and protected location starts protection to be switched, and switches the business to path 2.
Control plane starts the recovery flow process then: at first the detecting unit cancellation of port 2 is kept watch on, started the recovery in path 1 then, select the port 4 of A, B to set up path 3, upgrade protected location simultaneously, select port 4 as working port, port 3 is the protection port; After the path is set up successfully, the detecting unit of port 4 is opened supervision.
After protected location received to upgrade operation, first freeze protection unit was carried out the renewal of port then, upgraded the back releasing and freezed, the detection content of inquiry port 3 and port 4.
Below in conjunction with accompanying drawing, embodiments of the invention four are described.
The embodiment of the invention is with among the OTN, and control plane is managed 1+1 gold level attribute (protection combines with recovery) business and described for example.
The applied environment of the embodiment of the invention is as shown in Figure 7, and control plane is disposed the 1+1 gold level protection attribute business of an ODU1 between A, two websites of B.Control plane selects A-2 and B-2 as working port; Select A-3 and B-3 as the protection port.
Set up protected location at A, B node, and the detecting unit that 2 and 3 ports are set is opened supervision.
As shown in Figure 8, after breaking down in path 1, the detecting unit of 2 ports meeting report and alarm, the trigger protection unit is switched; At this moment control plane does not start the heavy-route process of recovering.
As shown in Figure 9, after breaking down in path 2, the detecting unit of 3 ports meeting report and alarm, the trigger protection unit is switched; Control plane triggers rerouting recovering simultaneously.
Control plane starts the recovery flow process: at first the detecting unit cancellation of port 2, port 3 is kept watch on; Start the recovery in path 2 then, select the port 4 of A, B to set up path 3, upgrade protected location simultaneously; Select port 2 as working port, port 4 is the protection port; After the path is set up successfully, the detecting unit of port 4 is opened supervision.
After protected location received to upgrade operation, first freeze protection unit was carried out the renewal of port then, upgraded the back releasing and freezed, the detection content of inquiry port 2 and port 4.
Embodiments of the invention provide professional restoration methods and the device of protection in a kind of ASON; That keeps watch on that a working port and a protection port constitute switches the recovery and protection group; When the said port of switching in the recovery and protection group breaks down, select a new port, use this new port to set up the path; Again said new port is replaced the port of fault; Be updated to the said recovery and protection group of switching, realized that 1+1 switches the replacement of recovery and protection group middle port, solved the longer traffic affecting problem of switching time under the GMPLS agreement.
The all or part of step that the one of ordinary skill in the art will appreciate that the foregoing description program circuit that can use a computer is realized; Said computer program can be stored in the computer-readable recording medium; Said computer program (like system, unit, device etc.) on the relevant hardware platform is carried out; When carrying out, comprise one of step or its combination of method embodiment.
Alternatively, all or part of step of the foregoing description also can use integrated circuit to realize, these steps can be made into integrated circuit modules one by one respectively, perhaps a plurality of modules in them or step is made into the single integrated circuit module and realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
Each device/functional module/functional unit in the foregoing description can adopt the general calculation device to realize, they can concentrate on the single calculation element, also can be distributed on the network that a plurality of calculation element forms.
Each device/functional module/functional unit in the foregoing description is realized with the form of software function module and during as independently production marketing or use, can be stored in the computer read/write memory medium.The above-mentioned computer read/write memory medium of mentioning can be a read-only memory, disk or CD etc.
Any technical staff who is familiar with the present technique field can expect changing or replacement in the technical scope that the present invention discloses easily, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the described protection range of claim.

Claims (10)

1. protect professional restoration methods in an ASON, this ASON uses general multiple protocols sign exchange agreement (GMPLS agreement), it is characterized in that this method comprises:
That keeps watch on that a working port and a protection port constitute switches the recovery and protection group;
When the said port of switching in the recovery and protection group breaks down, select a new port, use this new port to set up the path;
Said new port is replaced the port of fault, be updated to the said recovery and protection group of switching.
2. the professional restoration methods of protection in the ASON according to claim 1; It is characterized in that;, the said port of switching in the recovery and protection group is specially when breaking down when the said working port of switching the recovery and protection group breaks down; The port that said selection one is new uses this new port to set up before the step in path, also comprises:
Trigger to start professional heavy-route, the working port of fault is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this.
3. according to the professional restoration methods of protection in the ASON of claim 2, it is characterized in that, said new port replaced the port of fault, be updated to the said recovery and protection group of switching and be specially:
Said new port as new working port, is added the said recovery and protection group of switching.
4. the professional restoration methods of protection in the ASON according to claim 1; It is characterized in that;, the said port of switching in the recovery and protection group is specially when breaking down when the said working port of switching the recovery and protection group all breaks down with the protection port; The port that said selection one is new uses this new port to set up before the step in path, also comprises:
Trigger to start professional heavy-route, the protection port of fault is removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this.
5. according to the professional restoration methods of protection in the ASON of claim 4, it is characterized in that, said new port replaced the port of fault, be updated to the said recovery and protection group of switching and be specially:
Said new port as new protection port, is added the said recovery and protection group of switching.
6. the professional restoration methods of protection is characterized in that in the ASON according to claim 4, with the port of said new port replacement fault, is updated to after the said step of switching the recovery and protection group, also comprises:
With the said switching services of switching the recovery and protection group to the corresponding path of said new protection port.
7. according to the professional restoration methods of protection in claim 2 or the 4 described ASONs, it is characterized in that,, be updated to after the said step of switching the recovery and protection group, also comprise the port of said new port replacement fault:
After heavy-route is accomplished, start said supervision of switching the recovery and protection group.
8. protect professional recovery device in an ASON, this ASON uses the GMPLS agreement, it is characterized in that this device comprises:
Detecting unit is used to keep watch on that a working port and a protection port constitute switches the recovery and protection group;
Control plane is used for when the said port of switching the recovery and protection group breaks down, and selects a new port, uses this new port to set up the path;
Protected location is used for said new port is replaced the port of fault, is updated to the said recovery and protection group of switching.
9. the professional recovery device of protection is characterized in that in the ASON according to claim 8,
Said control plane; Also be used to trigger the heavy-route that starts business; Working port with fault when the said working port of switching the recovery and protection group breaks down is removed by the said recovery and protection group of switching; And cancellation switches the supervision of recovery and protection group to this, or when the said working port of switching the recovery and protection group all breaks down with the protection port, the protection port of fault removed by the said recovery and protection group of switching, and cancellation is switched the supervision of recovery and protection group to this; After heavy-route is accomplished, start said detecting unit to said supervision of switching the recovery and protection group.
10. the professional recovery device of protection in the ASON according to claim 9 is characterized in that said protected location comprises:
First update module, be used for said control plane with the working port of fault by said switch the recovery and protection group when removing with said new port as new working port, add the said recovery and protection group of switching;
Second update module, be used for said control plane with the protection port of fault by said switch the recovery and protection group when removing with said new port as new protection port, add the said recovery and protection group of switching.
CN2012101919090A 2012-06-12 2012-06-12 Recovery method for protection service in intelligent optical network Pending CN102739308A (en)

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CN2012101919090A CN102739308A (en) 2012-06-12 2012-06-12 Recovery method for protection service in intelligent optical network
PCT/CN2013/077030 WO2013185583A1 (en) 2012-06-12 2013-06-09 Method and device for recovering protection service in intelligent optical network

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CN2012101919090A CN102739308A (en) 2012-06-12 2012-06-12 Recovery method for protection service in intelligent optical network

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WO2013185583A1 (en) * 2012-06-12 2013-12-19 中兴通讯股份有限公司 Method and device for recovering protection service in intelligent optical network
CN105915279A (en) * 2016-05-18 2016-08-31 烽火通信科技股份有限公司 Method for triggering protection switching based on OTU alarm in WSON
CN106789630A (en) * 2016-12-30 2017-05-31 瑞斯康达科技发展股份有限公司 A kind of network protection method and system, controller, equipment
US20230344513A1 (en) * 2022-04-26 2023-10-26 Ciena Corporation Control Plane Triggered (CPT) Optical Protection Switching (OPS)

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WO2013185583A1 (en) * 2012-06-12 2013-12-19 中兴通讯股份有限公司 Method and device for recovering protection service in intelligent optical network
CN105915279A (en) * 2016-05-18 2016-08-31 烽火通信科技股份有限公司 Method for triggering protection switching based on OTU alarm in WSON
CN105915279B (en) * 2016-05-18 2018-05-29 烽火通信科技股份有限公司 A kind of method based on OTU alarm triggered pretection switch in WSON
CN106789630A (en) * 2016-12-30 2017-05-31 瑞斯康达科技发展股份有限公司 A kind of network protection method and system, controller, equipment
CN106789630B (en) * 2016-12-30 2019-07-26 瑞斯康达科技发展股份有限公司 A kind of network protection method and system, controller, equipment
US20230344513A1 (en) * 2022-04-26 2023-10-26 Ciena Corporation Control Plane Triggered (CPT) Optical Protection Switching (OPS)
US11967984B2 (en) * 2022-04-26 2024-04-23 Ciena Corporation Control plane triggered (CPT) optical protection switching (OPS)

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