CN101197591A - Protection recovery method and apparatus for ASON - Google Patents
Protection recovery method and apparatus for ASON Download PDFInfo
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- CN101197591A CN101197591A CNA2008100001668A CN200810000166A CN101197591A CN 101197591 A CN101197591 A CN 101197591A CN A2008100001668 A CNA2008100001668 A CN A2008100001668A CN 200810000166 A CN200810000166 A CN 200810000166A CN 101197591 A CN101197591 A CN 101197591A
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Abstract
The invention provides a protective recovery method for ASON and device thereof, after a fault occurs at a multiplex section link of nodes in the ASON, the following steps are included: a multiplex section layer where the fault position is determined whether the multiplex section layer has the protective recovery function or not; a connecting source node against whether the fault position and the multiplex section layer have the protective recovery function or not starts a process of rerouting recovery. The invention avoids unnecessary waste of network resource caused by the activity of the rerouting recovery of channel layer and the activity of the multiplex section layer protection which are performed at the same time, meanwhile guarantees that the fault can be recovered as soon as possible.
Description
Technical field
The present invention relates to the communications field, in particular to the method that is connected the rerouting recovering combination about the multiplex section protection in the ASON with channel layer.
Background technology
Along with transmitting the network traffic sharp increase, particularly factor causes SDH/WDM (Synchronous Digital Hierarchy according to the sharp increase of business information amount, synchronous digital hierarchy/Wavelength Division Multiplexing, wavelength division multiplexing) growth of optical transfer network traffic carrying capacity, provide professional means to seem more and more incompatible by human configuration in the conventional optical network, particularly traditional means has increased operation cost greatly.Just under these circumstances, thus come alternately to connect automatically automatically by signaling protocol that the ASON of configuration service (Automatically Switched Optical Network is called for short ASON) technology is born and begins to be applied.
The another one advantage of ASON network is the Mesh network recovery based on the connection end-to-end path that channel layer can be provided, promptly when connecting the fault generation, can in network, find new route according to the current network topology, set up new connection, business is switched to new connection from original connection transmits and receive.
In transmitting network, all there are protection Restoration Mechanism separately in client layer and service layer, adopt that 1+1 trail protection or 1:N trail protection are switched etc. as the passage client layer, and multiplex section layer (that is service layer) adopts multiplex section line style protection mechanism or ring protection mechanism.When service layer breaks down, occur simultaneously protecting and recover action and cause unnecessary network resources waste and prolong recovery time in order client layer and service layer not to occur, need reactivate to the protection of client layer and service layer and coordinate.
Common way is: when client layer influences business detecting fault, if it is not 0 that time of delay is switched in the client layer of setting in advance protection, then under time of delay, expiration and business were still nonserviceabled (generally being multiplex section protection failure scenario etc.) situation, begin to carry out the client layer protection and switch (switching) as the 1+1 trail protection; Otherwise (it is 0 that time of delay is switched in the client layer protection of setting even in advance) carried out the client layer protection immediately and switched.At conventional art, owing to lack perfect signaling mechanism, the delay behavior is a kind of static relatively behavior, and promptly whether client layer adopts to postpone to switch in advance and determined by webmaster.
Equally in the ASON network; except the coordination of path protection mechanism and multiplex section protection mechanism; also need the rerouting recovering of channel layer mechanism and multiplex section protection mechanism are coordinated, do not carry out simultaneously and cause unnecessary network resources waste and prolongation recovery time thereby the movable and multiplex section layer protection activity of channel layer rerouting recovering can not occur.
The method of a kind of multiplex section protection and grid network recovery combination is provided in correlation technique, has related to the Mesh network recovery system and multiplex section protection mechanism combines.When the connection of business (or claiming circuit) all links that the path strode across are that the multiplex section protection link is when (comprising that link is arranged in line style multiplex section protection link group or is arranged in multiplex section protective ring); if one or more link failures take place; judge at first that then can multiplex section protection mechanism protect business, if can not protect business then to start Mesh net rerouting recovering mechanism immediately.
But; this technical method can not be used for the situation of the professional part path that connects through the multiplex section protection link; and in fact an Operation Network zone usually has only part of nodes and link to constitute the multiplex section protection group, so usually can be the professional part of links process multiplex section protection link of crossing over that connects.
Summary of the invention
The present invention aims to provide protection restoration methods and the device of a kind of ASON of being used for, can avoid the movable and multiplex section layer protection activity of channel layer rerouting recovering to carry out simultaneously and causes unnecessary network resources waste.
In an embodiment of the present invention, provide the protection restoration methods of a kind of ASON of being used for, after the multiplex section link occurs fault of the node among the ASON, may further comprise the steps: whether failure judgement place multiplex section layer has the protection restore funcitons; Whether the source node that connects has protection restore funcitons startup rerouting recovering process at abort situation and multiplex section layer.
In an embodiment of the present invention, also provide the protection recovery device of a kind of ASON of being used for, having comprised: judge module, be used for after the multiplex section link occurs fault of the node of ASON, whether failure judgement place multiplex section layer has the protection restore funcitons; First recovers module, is used to make the source node of connection whether to have protection restore funcitons startup rerouting recovering process at abort situation and multiplex section layer.
Protection restoration methods that is used for ASON of the foregoing description and device are in real time when the multiplex section fault takes place; whether has a fault recovery function according to the multiplex section layer; determine that dynamically the failure condition according to channel layer determines whether to start rerouting recovering after channel layer starts rerouting recovering immediately or needs to postpone certain hour; thereby promptly avoided the movable and multiplex section layer protection activity of channel layer rerouting recovering to carry out simultaneously and caused unnecessary network resources waste, guaranteed simultaneously that also fault can recover as soon as possible.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart according to the protection restoration methods that is used for ASON of the embodiment of the invention;
Fig. 2 is according to the Mesh net of an embodiment of technical solution of the present invention, former professional connection diagram, has wherein comprised one two fibre two-way multi-section guard ring in the Mesh net;
Fig. 3 is with after channel layer detects fault and carried out being connected network and connection diagram behind the rerouting recovering according to the multiplex section layer of an embodiment of technical solution of the present invention;
Fig. 4 is network and the connection diagram that detects fault according to the multiplex section layer of an embodiment of technical solution of the present invention and channel layer;
Fig. 5 is on the multiplex section protective ring and network and the connection diagram of multiplex section layer after successfully protecting business according to the faulty link of an embodiment of technical solution of the present invention;
Fig. 6 is on the multiplex section protective ring and network and the connection diagram of multiplex section layer protection failure after connecting rerouting recovering according to the faulty link of an embodiment of technical solution of the present invention;
Fig. 7 shows the block diagram according to the protection recovery device that is used for ASON of the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the flow chart according to the protection restoration methods that is used for ASON of the embodiment of the invention, after the multiplex section link occurs fault of the node among the ASON, may further comprise the steps:
Step S10, whether failure judgement place multiplex section layer has the protection restore funcitons;
Step S30, whether the source node of connection has protection restore funcitons startup rerouting recovering process at abort situation and multiplex section layer.
The protection restoration methods that is used for ASON of the foregoing description is in real time when the multiplex section fault takes place; whether has a fault recovery function according to the multiplex section layer; determine that dynamically the failure condition according to channel layer determines whether to start rerouting recovering after channel layer starts rerouting recovering immediately or needs to postpone certain hour; thereby promptly avoided the movable and multiplex section layer protection activity of channel layer rerouting recovering to carry out simultaneously and caused unnecessary network resources waste, guaranteed simultaneously that also fault can recover as soon as possible.
Preferably, not the source node that connects if whether failure judgement place multiplex section layer has the node of protection restore funcitons, then whether abort situation and multiplex section layer are had the protection restore funcitons and notify the source node that is connected by signaling.
Preferably, whether the source node that connects has the protection restore funcitons at abort situation and multiplex section layer starts the rerouting recovering process and specifically comprises: if the multiplex section layer does not have the protection restore funcitons, then the source node of Lian Jieing switches to new connection with business from former connection by setting up the new connection of avoiding abort situation based on Mesh network topology heavy-route; If the multiplex section layer has the protection restore funcitons, then the source node that connects determines whether to start rerouting recovering through the failure condition according to channel layer after the scheduled time.
Preferably, the source node of connection determines whether that through the failure condition according to channel layer after the scheduled time starting rerouting recovering specifically comprises: the source node of connection and purpose of connecting node all carry out the channel layer fault detect; The purpose of connecting node detection is notified the source node that connects after the channel layer fault; The source node that connects starts connection rerouting recovering process at the channel layer fault.
Preferably, the source node of connection is at the channel layer fault, and start connection rerouting recovering process and specifically comprise: the source node of connection switches to new connection with business from former connection by setting up the new connection of avoiding abort situation based on Mesh network topology heavy-route.
Rerouting recovering mechanism and multiplex section protection mechanism for the coordinate path layer; and consider application scenarios widely; promptly allow the coupling part route through the multiplex section protection link; the above-mentioned channel layer rerouting recovering mechanism and the dynamic associated methods of multiplex section protection mechanism comprise: when the multiplex section fault takes place; can determine in abort situation whether guilty culprit service layer has the protection restore funcitons; and this abort situation and multiplex section protection restore funcitons information notified be connected rerouting recovering control point (generally being to connect the source node that control domain is recovered at the place); after thereby source node is received information; if guilty culprit multiplex section layer does not have restore funcitons; then can start channel layer rerouting recovering process immediately, otherwise can continue for some time if still there is the rerouting recovering activity of then carrying out channel layer in the channel layer fault.The multiplex section protection link here is meant: this link belongs to a line style multiplex section protection group (one group of parallel link is formed) or a MSP-ring group.
Below in conjunction with accompanying drawing 2 to 6, the present invention is described in further detail by providing embodiment.
In the present embodiment; Mesh network shown in Figure 2 is made of the link between network element A, B, C, D, E, F, G, H and these nodes; wherein the Mesh network comprises one two fibre two-way multi-section guard ring; this ring is made of the link between Node B, C, D, E and these nodes; node A, B, C, the H that the one way traffic access path is netted through this Mesh; connecting source node is A, and connecting destination node is H.Based on Fig. 2 and other schematic diagram, the dynamic associated methods of multiplex section protection of the present invention and channel layer rerouting recovering is as follows:
The first step, through the multiplex section link occurs fault of a node, described node is found professional a connection through faulty link, it judges that at first can the multiplex section layer carry out fault recovery by this layer protection activity.Further, if this node is not that then it will comprise the source node A that the alarm information noticing of abort situation information and multiplex section layer defencive function information is connected for the source node that connects.The purpose of connecting node is also notified at sense channel layer signal state and after finding fault and is connected source node simultaneously.
Among Fig. 3, the fiber links fault of multiplex section protection taking place not to be subjected to, connects destination node H and also detected the channel layer fault between source node A and the Node B.As shown in Figure 3; connection source node A detects the multiplex section link occurs fault between node A and B; and since this link not in line style multiplex section protection link group also not in the MSP-ring ring, so its is judged: the multiplex section layer can not recover the professional fault that connects.
Among Fig. 4, be subjected to the fiber links fault of multiplex section protection between Node B and the node C, connect destination node H and also detected the channel layer fault.As shown in Figure 4; Node B detects the multiplex section link occurs fault between Node B and C; and because this link is in the MSP-ring ring; therefore its is judged: the multiplex section layer may recover the professional fault that connects, and it will comprise the source node A that the alarm information noticing of abort situation information and this multiplex section layer defencive function information is connected then.
As shown in Figure 3 and Figure 4, also detected the channel layer fault, so the source node A that its notice connects owing to connect destination node H.
Second step, if the source node A that connects according to warning information, the multiplex section layer can not recover fault, then it connects startup rerouting recovering process immediately: by avoid the new connection of abort situation based on the heavy-route foundation of Mesh network topology, business is got on (promptly business connects transmission and reception newly) from the newly-built connection that former connection switches to heavy-route; Otherwise according to warning information, the multiplex section layer can utilize this layer protection mechanism to recover fault as if the source node A that connects, and then it is provided with a sluggish timer, and the failure condition according to channel layer after the timer expiration determines whether to start rerouting recovering.
As shown in Figure 3, because source node determines that according to warning information the multiplex section layer can not recover to connect fault, therefore it starts immediately based on Mesh network topology heavy-route process, has set up the new connection through A, F, G, H of avoiding abort situation, and switching services has arrived this new connection.
As shown in Figure 4, connect the warning information that source node A transmits according to Node B, know that thereby the multiplex section layer may recover fault carrying out the fault recovery activity, A is provided with a sluggish timer, and the failure condition according to channel layer after the timer expiration determines whether to start rerouting recovering.
The 3rd goes on foot, exists if connect fault at channel layer, then start and connect the rerouting recovering process: by set up the new connection of avoiding abort situation based on Mesh network topology heavy-route, business is got on from the newly-built connection that former connection switches to heavy-route, otherwise do not start the rerouting recovering process of described connection.
Among Fig. 5, be subjected to the fiber links fault of multiplex section protection between Node B and the node C.As Fig. 5; the multiplex section layer has successfully carried out protection and has switched; make that former connection is walked B, E, D by changing, faulty link has been walked around in the C path; thereby connect destination node and find that the channel layer fault disappears and notice connects source node; source node A determines not exist in the former professional fault that connects of channel layer, so it no longer further takes the rerouting recovering activity of channel layer.
Among Fig. 6, be subjected to the fiber links fault of multiplex section protection between Node B and the node C, the channel layer fault takes place between node C and the node H.As Fig. 6; recover reasons such as failure (it is former thereby can't protect business multilink fault etc. to have occurred as the multiplex section ring) owing to multiplex section layer protection; node A determines still to exist in the fault of the professional former connection of channel layer; so it starts the connection rerouting recovering process based on the Mesh network topology; set up the new connection of avoiding abort situation, and switching services has arrived this new connection (promptly business sends and receives) on new the connection through A, F, G, H.
Fig. 7 shows the block diagram according to the protection recovery device that is used for ASON of the embodiment of the invention, comprising:
First recovers module 30, is used to make the source node of connection whether to have protection restore funcitons startup rerouting recovering process at abort situation and multiplex section layer.
The protection recovery device that is used for ASON of the foregoing description is in real time when the multiplex section fault takes place; whether has a fault recovery function according to the multiplex section layer; determine that dynamically the failure condition according to channel layer determines whether to start rerouting recovering after channel layer starts rerouting recovering immediately or needs to postpone certain hour; thereby promptly avoided the movable and multiplex section layer protection activity of channel layer rerouting recovering to carry out simultaneously and caused unnecessary network resources waste, guaranteed simultaneously that also fault can recover as soon as possible.
Preferably; this device also comprises first notification module 20; whether have the source node that the node of protecting restore funcitons is not connection if be used for failure judgement place multiplex section layer, then whether abort situation and multiplex section layer are had the protection restore funcitons and notify the source node that is connected by signaling.
Preferably, the first recovery module 30 comprises:
First module does not have the protection restore funcitons if be used for the multiplex section layer, and then the source node of Lian Jieing switches to new connection with business from former connection by setting up the new connection of avoiding abort situation based on Mesh network topology heavy-route;
Unit second has the protection restore funcitons if be used for the multiplex section layer, and then the source node that connects determines whether to start rerouting recovering through the failure condition according to channel layer after the scheduled time.
Preferably, Unit second comprises:
Detection module is used to make the source node of connection and purpose of connecting node all to carry out the channel layer fault detect;
Second notification module is used to make the purpose of connecting node detection to notify the source node that connects after the channel layer fault;
Second recovers module, and the source node that is used to connect starts connection rerouting recovering process at the channel layer fault.
Preferably, second recovers module comprises: Unit the 3rd, the source node that is used to make connection switches to new connection with business from former connection by setting up the new connection of avoiding abort situation based on Mesh network topology heavy-route.
From technique scheme as can be seen: the technical program can be in real time when the multiplex section fault takes place; whether has a fault recovery function according to the multiplex section layer; determine that dynamically the failure condition according to channel layer determines whether to start rerouting recovering after channel layer starts rerouting recovering immediately or needs to postpone certain hour; thereby promptly avoided the movable and multiplex section layer protection activity of channel layer rerouting recovering to carry out simultaneously and caused unnecessary network resources waste, guaranteed simultaneously that also fault can recover as soon as possible.Compare with correlation technique, its obvious advantage or difference are:
1) warning information that will comprise abort situation and multiplexing defencive function by signaling is delivered to and is connected source node;
2) when the connection source node knows that multiplex section protection exists, it is provided with sluggish timer and connects fault by further sense channel level after sluggish timer expiration whether still have to determine whether to start channel level connection rerouting recovering process;
3) and, correlation technique does not consider that the multiplex section protection process starts but might cause protecting the situation of failure.The inventive method does not limit all links that connect process and all is subjected to the protection of multiplex section layer.Therefore this technology is compared with correlation technique and is had tangible advantage.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a protection restoration methods that is used for ASON is characterized in that, after the multiplex section link occurs fault of the node in the described ASON, may further comprise the steps:
Whether failure judgement place multiplex section layer has the protection restore funcitons;
Whether the source node that connects has protection restore funcitons startup rerouting recovering process at abort situation and multiplex section layer.
2. protection restoration methods according to claim 1 is characterized in that, also comprises:
If whether failure judgement place multiplex section layer has the node of protection restore funcitons is not the source node of described connection, then whether described abort situation and multiplex section layer is had the protection restore funcitons and notify the source node that is connected by signaling.
3. protection restoration methods according to claim 1 is characterized in that, whether the source node of described connection has the protection restore funcitons at described abort situation and multiplex section layer starts the rerouting recovering process and specifically comprise:
If described multiplex section layer does not have the protection restore funcitons, then the source node of described connection switches to described new connection with business from former connection by setting up the new connection of avoiding described abort situation based on Mesh network topology heavy-route;
If described multiplex section layer has the protection restore funcitons, then the source node of described connection determines whether to start rerouting recovering through the failure condition according to channel layer after the scheduled time.
4. protection restoration methods according to claim 3 is characterized in that, the source node of described connection specifically comprises through determining whether to start rerouting recovering according to the failure condition of channel layer after the scheduled time:
The source node of described connection and purpose of connecting node all carry out the channel layer fault detect;
Described purpose of connecting node detection is notified the source node of described connection after the channel layer fault;
The source node of described connection starts connection rerouting recovering process at described channel layer fault.
5. protection restoration methods according to claim 4 is characterized in that, the source node of described connection starts connection rerouting recovering process and specifically comprises at described channel layer fault:
The source node of described connection switches to described new connection with business from former connection by setting up the new connection of avoiding described abort situation based on Mesh network topology heavy-route.
6. protection recovery device that is used for ASON, it is characterized in that, comprise: judge module, be used for after the multiplex section link occurs fault of the node of described ASON, whether failure judgement place multiplex section layer has the protection restore funcitons;
First recovers module, is used to make the source node of connection whether to have protection restore funcitons startup rerouting recovering process at abort situation and multiplex section layer.
7. protection recovery device according to claim 6 is characterized in that, also comprises:
First notification module; if be used for failure judgement place multiplex section layer whether have the protection restore funcitons node be not the source node of described connection, then by signaling with described abort situation and multiplex section layer whether have the protection restore funcitons notify the described source node that is connected.
8. protection recovery device according to claim 6 is characterized in that, described first recovers module comprises:
First module does not have the protection restore funcitons if be used for described multiplex section layer, and then the source node of described connection switches to described new connection with business from former connection by setting up the new connection of avoiding described abort situation based on Mesh network topology heavy-route;
Unit second has the protection restore funcitons if be used for described multiplex section layer, and then the source node of described connection determines whether to start rerouting recovering through the failure condition according to channel layer after the scheduled time.
9. protection recovery device according to claim 8 is characterized in that, described Unit second comprises:
Detection module is used to make the source node of described connection and purpose of connecting node all to carry out the channel layer fault detect;
Second notification module is used to make described purpose of connecting node detection to notify the source node of described connection after the channel layer fault;
Second recovers module, and the source node that is used for described connection starts connection rerouting recovering process at described channel layer fault.
10. protection recovery device according to claim 9 is characterized in that, described second recovers module comprises:
Unit the 3rd, the source node that is used to make described connection switches to described new connection with business from former connection by setting up the new connection of avoiding described abort situation based on Mesh network topology heavy-route.
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| CN2008100001668A CN101197591B (en) | 2008-01-02 | 2008-01-02 | Protection recovery method and apparatus for ASON |
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| CN2008100001668A CN101197591B (en) | 2008-01-02 | 2008-01-02 | Protection recovery method and apparatus for ASON |
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| CN101197591B CN101197591B (en) | 2011-05-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010145497A1 (en) * | 2009-06-17 | 2010-12-23 | 中兴通讯股份有限公司 | Method and device for protecting service based on automatic switched optical network |
| CN102468885A (en) * | 2010-11-17 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for handling link failure |
| CN101800913B (en) * | 2009-02-11 | 2013-02-27 | 中兴通讯股份有限公司 | Realization method for protecting and restoring multiplex section of automatically switched optical network |
| WO2016091190A1 (en) * | 2014-12-12 | 2016-06-16 | 中兴通讯股份有限公司 | Route switching method and apparatus of device |
| WO2017118425A1 (en) * | 2016-01-06 | 2017-07-13 | 中兴通讯股份有限公司 | Service processing method and device |
| CN109155756A (en) * | 2016-10-31 | 2019-01-04 | 华为技术有限公司 | A kind of adding method and system of electric layer resource |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100531092C (en) * | 2005-01-25 | 2009-08-19 | 华为技术有限公司 | Intelligent optical network business re-routing trigging method |
| CN1333554C (en) * | 2005-05-16 | 2007-08-22 | 烽火通信科技股份有限公司 | Method for combining multi-section protection and mesh network recovery |
| CN101138256B (en) * | 2005-06-06 | 2010-05-12 | 中兴通讯股份有限公司 | Cooperative method for protection recovery between layered network in automatic exchange optical network |
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2008
- 2008-01-02 CN CN2008100001668A patent/CN101197591B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800913B (en) * | 2009-02-11 | 2013-02-27 | 中兴通讯股份有限公司 | Realization method for protecting and restoring multiplex section of automatically switched optical network |
| WO2010145497A1 (en) * | 2009-06-17 | 2010-12-23 | 中兴通讯股份有限公司 | Method and device for protecting service based on automatic switched optical network |
| CN102468885A (en) * | 2010-11-17 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for handling link failure |
| WO2012065470A1 (en) * | 2010-11-17 | 2012-05-24 | 中兴通讯股份有限公司 | Method and device for processing link fault |
| WO2016091190A1 (en) * | 2014-12-12 | 2016-06-16 | 中兴通讯股份有限公司 | Route switching method and apparatus of device |
| WO2017118425A1 (en) * | 2016-01-06 | 2017-07-13 | 中兴通讯股份有限公司 | Service processing method and device |
| CN109155756A (en) * | 2016-10-31 | 2019-01-04 | 华为技术有限公司 | A kind of adding method and system of electric layer resource |
| CN109155756B (en) * | 2016-10-31 | 2020-10-23 | 华为技术有限公司 | Method and system for adding electrical layer resources |
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| CN101197591B (en) | 2011-05-25 |
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Granted publication date: 20110525 Termination date: 20180102 |