CN102740175B - Method for protecting and recovering cross-domain end-to-end label switched path - Google Patents
Method for protecting and recovering cross-domain end-to-end label switched path Download PDFInfo
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Abstract
The invention discloses a method for protecting and recovering a cross-domain end-to-end label switched path and relates to the field of an automatic switched optical network. The method comprises the following steps of: S1, building a work path and N protection paths, wherein N is greater than or equal to 1; S2, judging the path in which a fault occurs, if the path is the work path, carrying out protection switching on business, and judging the position at which the fault is at the same time; if the position is in a source domain, a host domain or an intermediate domain, triggering one protection path bypassing a fault point in the domain in which the fault occurs; splicing the protection path with the protection paths without the fault in the other domains to form a new protection path; if the position is between the domains, performing no triggering on recovery of the work path with the fault; and if the fault is on the protection path, needing no protection switching on the business, triggering one new protection path in the domain, and splicing the protection path with the protection path without the fault in other domains to form another new protection path. According to the invention, by protecting, restoring and splicing an LSP (link state packet) of each segment, multipoint faults in the domains or between the domains are effectively resisted, and high reliability requirements of cross-domain business are met.
Description
Technical field
The present invention relates to ASON field, is specifically a kind of protection restoration methods of cross-domain end-to-end label switched path.
Background technology
Along with the demand of business dispatching flexibility in optical-fiber network, ASON (Automatically Switched Optical Network, ASON) arises at the historic moment.The automatic control function of ASON network is embodied in a control domain more, comprising: the auto-returned after protection recovery and fault clearance when the foundation of business and deletion, traffic failure.
In the time that ASON network is made up of multiple producers equipment, in order to shield difference and protection self key technology in devices from different manufacturers details, the equipment of each producer is a meeting ASON control domain of composition separately conventionally, by the devices interconnect of domain-to-domain link and other producers.Will cause like this needing to cross over the control domain of multiple ASON networks for some business provides the LSP (Label Switch Path, label switched path) of service, these LSP can be referred to as cross-domain end-to-end LSP.For convenient narration, cross-domain all the referring to of below mentioning crossed over multiple ASON control domains.The application of the cross-domain end-to-end LSP that provides service for business in network; cross-domain end-to-end LSP need to possess certain robustness; in the situation that Internet resources are enough, for providing, business protects fast restore funcitons, to resist the fault of network each point on path on the way.
But, for fault between territory, still do not have ripe sound technology to solve protection at present and recover problem of implementation.There is at present ENNI (Exernal Network Network Interface; External Network-to-Network Interface) technology is by the signalling interworking of control plane; its original target is positioned at the cross-domain end-to-end LSP problem that solves; but up to now; ENNI is also at the experimental stage; relevant criterion immature development, recovers quite weakness of definition to the protection of cross-domain end-to-end LSP.In addition, between the many producers of the intercommunication of ENNI signaling, realize and there is no unified, detailed specification, to the difference realizing in agreement understanding and details, while often causing intercommunication, need carry out a large amount of debugging, be not used in opening and safeguarding of engineering.Therefore, the ENNI technology of present stage can not solve the protection recovery problem of cross-domain end-to-end LSP effectively.
Summary of the invention
For the defect existing in prior art; the object of the present invention is to provide a kind of protection restoration methods of cross-domain end-to-end label switched path; between territory without control plane signalling interworking in the situation that; recover and splicing by the protection of each section of LSP; build the quick protection recovery capability of cross-domain end-to-end LSP; effectively resist multipoint fault in territory and between territory, meet the high reliability request of cross-domain service.
For reaching above object, the technical scheme that the present invention takes is: a kind of protection restoration methods of cross-domain end-to-end label switched path, comprise the following steps: S1. sets up respectively label switched path in each territory, by domain-to-domain link, described label switched path is spliced again, form 1 operating path and N bar Protection path, N >=1; And operating path is uncorrelated with Protection path route; S2. when fault occurs, there is path in failure judgement: if operating path, there is protection and switch in business, select current not fault, and the Protection path that priority is the highest becomes new operating path, business is switched, simultaneously failure judgement position: if territory, source, territory, place or intermediate field, one of the territory internal trigger occurring in fault gets around the Protection path of fault point, then with other territory in not the Protection path of fault be again spliced into a new Protection path; If between territory, the not reparation in triggering for generating fail operation path; If Protection path, protection does not occur business switches, and newly in this territory triggers a Protection path, then with other territory in not the Protection path of fault be spliced into new Protection path.
On the basis of technique scheme, in described step S1, set up the label switched path of the non-chummage of homology in the territory, source of business, set up the label switched path of non-homogeneous non-chummage at intermediate field, set up the label switched path of non-homogeneous chummage in territory, place, between adjacent two territories, use identical link circuit resource and label that each section of label switched path is stitched together.
On the basis of technique scheme, in described step S1, the protection of cross-domain end-to-end label switched path is only configured in the Yu Hesu territory, source of business, between territory, have at least 2 interconnected, at Yu Hesu territory, source configuration N+1 protection group, i.e. 1 protected object, N object of protection, N >=1; When business is set up, the operating path at place is protected object, and N Protection path is object of protection, and remaining is points to unique protected object.
On the basis of technique scheme, each described Protection path configures identical protection priority in source node and two different N+1 protection groups of destination node.
On the basis of technique scheme, when described N=1, between territory, be 2 interconnected, at Yu Hesu territory, source configuration 1+1 protection group, i.e. 1 protected object, 1 object of protection.
On the basis of technique scheme; in described step S2; if operating path produces fault in Yu Huosu territory, source; the protection relationship change of the source node in Yu Huosu territory, guilty culprit source or destination node N+1 protection group; described new operating path can become protected object from object of protection; by producing the corresponding protected object of old operating path of fault, from protection group, delete simultaneously.
On the basis of technique scheme, the new Protection path of described splicing, adds in N+1 protection group with the role of object of protection, and its protection priority is that this protection group is minimum.
On the basis of technique scheme, in described step S2, if in intermediate field when operating path fault, dynamic recovery can not triggered in Yu Hesu territory, source, and the protection relation of source node and destination node N+1 protection group does not change.
On the basis of technique scheme, in described step S2, if between territory when operating path fault, the protection that source node and destination node only carry out business according to fault warning is switched, and source node and destination node N+1 protection group protection relation are unchanged.
On the basis of technique scheme; in described step S2; if in territory when Protection path fault; if fault occurs in Yu Huosu territory, source; the source node in this territory or destination node are in N+1 protection group; for the new Protection path dynamically recovering adds corresponding object of protection, this object of protection points to the protected object under operating path.
On the basis of technique scheme, in described step S2, if in territory when Protection path fault, if fault occurs in intermediate field, the N+1 protection group protection relation of service source node and destination node is unchanged.
On the basis of technique scheme, in described step S2, if between territory when Protection path fault, protection does not occur business switches, and service source node and destination node N+1 protection group protection relation are unchanged.
On the basis of technique scheme, shown in step S2, in the time that the operating path in N+1 protection group and many Protection paths break down simultaneously, described business is switched to the Protection path not breaking down.
On the basis of technique scheme; in described step S1; by on existing four territory boundary nodes between two adjacent territories; build between territory the interconnected wireless mesh network of node between two; many domain-to-domain links are provided, and need to ensure the different domain-to-domain link of Protection path process that cross-domain end-to-end LSP is different.
Beneficial effect of the present invention is: can be between territory not intercommunication of control plane in the situation that, effectively improve the survivability of crossing over multiple ASON business, after breaking down, the existence of N+1 protection group, can carry out according to the situation of fault protection recovery and the splicing of each section of LSP, make cross-domain end-to-end LSP there is the ability of opposing network multiple spot simultaneous faults; In the time that the operating path in N+1 protection group and many Protection paths break down simultaneously; as long as also having Protection path is fault not; business just can be switched to this Protection path; the quick protection that builds cross-domain end-to-end LSP recovers; therefore the ability that possesses opposing network mulitpath simultaneous faults, goes for those to failover capability and the extra high network of time requirement.
Brief description of the drawings
Fig. 1 is that twice, Yu Hesu territory, first embodiment of the invention 1+1 cross-domain end-to-end LSP source error protection is recovered schematic diagram;
Fig. 2 is that the protection of second embodiment of the invention 1+1 cross-domain end-to-end LSP intermediate field single failure recovers schematic diagram;
Fig. 3 is that between third embodiment of the invention 1+1 cross-domain end-to-end LSP territory, single failure protection recovers schematic diagram;
Fig. 4 is that the protection of fourth embodiment of the invention 2+1 cross-domain end-to-end LSP multipath simultaneous faults recovers schematic diagram;
Fig. 5 is that between fifth embodiment of the invention territory, the protection of the 2+1 cross-domain end-to-end LSP in the interconnected situation of Mesh recovers schematic diagram.
Embodiment
Below the present invention is described in further detail.
The protection restoration methods of cross-domain end-to-end LSP of the present invention, comprises step:
S1. in each territory, set up respectively LSP, then by domain-to-domain link, described LSP is spliced, form 1 operating path and N bar Protection path, N >=1; And operating path is uncorrelated with Protection path route.
Because operating path and the Protection path of cross-domain end-to-end LSP have route irrelevance, in the time of passing through network, use different territory boundary nodes, there is different place, identical source in territory, source, intermediate field has different place, different sources, there is identical place, different sources in territory, place, that is to say, set up the LSP of the non-chummage of homology in the territory, source of business, set up the LSP of non-homogeneous non-chummage at intermediate field, set up the LSP of non-homogeneous chummage in territory, place, then be spliced into operating path and the Protection path of complete cross-domain end-to-end LSP, and configure dynamic recovery capability for every section of LSP in territory.
The protection of end-to-end LSP is only configured in the Yuan Hesu of business, in the time of N=1, between territory, be 2 interconnected, at Yu Hesu territory, source configuration 1+1 protection group, i.e. 1 protected object, 1 object of protection.In the time of N > 1, between territory, have 2 above interconnected, can set up Article 2, Article 3 Protection path even, can be important service in sourcesink configuration N+1 protection group the anti-repeatedly ability of fault between territory be provided.In N+1 protection group, there is definite protection relation, i.e. 1 protected object, N object of protection.When business is set up, the operating path at place is protected object, and remaining N Protection path is object of protection, all points to unique protected object, is multipair 1 relation.
N Protection path needs configuration protection priority in the time that protection is provided for operating path, in the time of the fault of work generation footpath, road, therefrom choose a highest Protection path of priority.User's strategy is followed in the configuration of protection priority, and such as the Protection path priority of first setting up is higher than rear foundation, through nodes few Protection path priority, higher than many through nodes, the numerical value of protection priority is less, and the grade of protection is higher.Be switched to different Protection paths for fear of posterior service source node and destination node, each Protection path of cross-domain end-to-end LSP configures identical protection priority in source node and two different N+1 protection groups of destination node.But operating path is not protected priority.
S2., when fault occurs, there is path in failure judgement:
If operating path, there is protection and switch in business, select current not fault, and the Protection path that priority is the highest becomes new operating path, business is switched, simultaneously failure judgement position: if territory, source, territory, place or intermediate field, one of the territory internal trigger occurring in fault gets around the Protection path of fault point, then with other territory in not the Protection path of fault be again spliced into a new Protection path; If between territory, the not reparation in triggering for generating fail operation path.
If Protection path, protection does not occur business switches, and newly in this territory triggers a Protection path, then with other territory in not the Protection path of fault be spliced into new Protection path.
In described step S2, if operating path produces fault in Yu Huosu territory, source, it specifically protects restoration methods to be:
When the source node of business and destination node are received fault warning, choose the highest Protection path of protection priority from N Protection path, switch the business to this Protection path, as new operating path, this form is called protection and switches.
When business generation protection is switched, LSP source node in the territory in territory, place, fault point, control plane is receiving that after the failure message that hardware reports, startup dynamically recovers.According to regulation G.8080, the fault in a control domain should only dynamically be recovered in this territory, and of short duration Signal Fail will only be observed in the territory in its downstream.The control domain breaking down should continue to use original entrance and exit territory boundary node.Therefore; territory internal fault should be in failure domain, follows the principle separating with operating path, failure path route, triggers a Protection path that gets around fault point; again with other territory in not the Protection path of fault be again spliced into a new Protection path of cross-domain end-to-end, this process is dynamic recovery.
After business occurs to protect and switches; the highest Protection path of protection priority becomes current new operating path; protection relation in the N+1 protection group of the business end node (source node or destination node) in guilty culprit end territory (Yu Huosu territory, source) changes; described new operating path can become protected object from object of protection; the object of protection that remaining Protection path is corresponding all points to it; protected object corresponding to the old operating path of fault deleted from protection group simultaneously, thereby ensured all only have a path to belong to protected object in arbitrary moment protection group.The new Protection path of described dynamic recovery can add in N+1 protection group with the role of object of protection, and its protection priority is that this protection group is minimum; And another end territory of not breaking down (Yu Huosu territory, source), owing to not dynamically not recovering to occur, only receiving after fault warning, in this territory, carry out described protection to switch, do not change the protection relation in N+1 protection group.
In step S2, if in intermediate field when operating path fault, the node at business two ends is all received fault warning; producing protection switches; from N Protection path, choose the highest Protection path of protection priority, switch the business to this Protection path, as new operating path.Simultaneously; in territory, the source boundary node of the former operating path of generation fault starts dynamically recovery after receiving fault warning; trigger a Protection path that gets around fault point, then with other territory in not the Protection path of fault be again spliced into a new Protection path of cross-domain end-to-end.Because fault occurs in intermediate field, dynamic recovery can not triggered in Yu Hesu territory, source, and therefore the protection relation of source node and destination node N+1 protection group does not change.
In step S2; if between territory when operating path fault; due to not intercommunication between control plane territory; the LSP that between territory, fault can not trigger in arbitrary territory dynamically recovers; source node and destination node are only switched according to fault warning protection, and service source node and destination node N+1 protection group protection relation are unchanged.
In step S2, if in territory when Protection path fault, there is not protection and switch in business; the dynamic recovery of this territory LSP is triggered in fault generation territory; the step of dynamically recovering and above-mentioned identical, after dynamically having recovered, is spliced into a new Protection path again with the Protection path in other territory.Wherein, if fault occurs in end territory (Yu Huosu territory, source); the business end node in this territory is in N+1 protection group, and for the new Protection path dynamically recovering adds corresponding object of protection, this object of protection points to the protected object under operating path.If fault occurs in intermediate field, the N+1 protection group protection relation of service source node and destination node is unchanged.
In step S2, if between territory when Protection path fault, protection does not occur business switches, and does not also trigger dynamic recovery, and service source node and destination node N+1 protection group protection relation are unchanged.
Below by the drawings and specific embodiments, the present invention will be further described.
In following the first embodiment to the three embodiment, be 3 networks that ASON is interconnected that 12 nodes are set up, be respectively territory A, territory B, territory C, have 4 interconnected nodes between two in every territory, wherein territory A comprises A1, A2, A3, A4; Territory B comprises B1, B2, B3, B4; Territory C comprises C1, C2, C3, C4; Four-headed arrow solid line represents the two-way link of cross-domain end-to-end LSP operating path process; Four-headed arrow dotted line represents the two-way link of cross-domain end-to-end LSP Protection path process; Double solid line represents can be used for the dynamic two-way link recovering in territory.Created the end-to-end LSP that has crossed over 3 networks from A1 to C2, wherein operating path is A1-A2-B1-B2-C1-C2, and Protection path is A1-A3-B4-B3-C4-C2, and on A1 and C2, operating path and Protection path form respectively 1+1 protection group.Wherein, operating path and Protection path by three horizontal networks be divided into three sections, interconnected by domain-to-domain link.Operating path and Protection path have used different territory boundary nodes in the time of passing through network.
The first embodiment:
As shown in Figure 1, for the each primary fault protection in Yu Hesu territory, 1+1 cross-domain end-to-end LSP of the present invention source recovers schematic diagram.In the time of light fault generation for the first time, business is switched to Protection path as shown in Figure 1, and A1-A3-B4-B3-C4-C2 is as new operating path.Start immediately dynamic recovery with the operating path A1-A2 in time domain A, restoration path is A1-A4-A2, forms the new Protection path A1-A4-A2-B1-B2-C1-C2 of end-to-end LSP.This fault can cause the 1+1 protection group of source node A1 to change, and the affiliated object of protection of Protection path A1-A3 original in territory, source is promoted to the protected object in 1+1 protection group.The new route A1-A4-A2 dynamically recovering in territory, source is newly-increased object of protection, points to this and organizes current protected object A1-A3.Destination node C2 only protects and switches in the time of fault, and the protection relation of its 1+1 protection group is unchanged.
If there is fiber failure for the second time as shown in Figure 1 in the time that fiber failure does not recover for the first time, business continues to occur protection and switches, and business is switched on A1-A4-A2-B1-B2-C1-C2 path, becomes new operating path; Start dynamically and recover with the C4-C2 in time domain C, restoration path is C4-C3-C2, forms the new Protection path A1-A3-B4-B3-C4-C3-C2 of end-to-end LSP; In the N+1 protection group of destination node C2, the variation of protection relation is with fiber failure is identical for the first time.
The second embodiment:
As shown in Figure 2, for the protection of 1+1 cross-domain end-to-end LSP intermediate field single failure recovers schematic diagram.When fiber failure occurs in shown in Fig. 2 on position, business can be switched to Protection path A1-A3-B4-B3-C4-C2, as new operating path, but can initiating accident sequence node and the variation of destination node 1+1 protection group protection relation.Former operating path B1-B2 in the B of territory starts dynamically and recovers immediately after fault occurs, and restoration path is B1-B4-B2 or B1-B3-B2, forms new Protection path A1-A2-B1-B4 (B3)-B2-C1-C2 of end-to-end LSP.
The 3rd embodiment:
As shown in Figure 3, for single failure protection between 1+1 cross-domain end-to-end LSP territory recovers schematic diagram.In the time that fiber failure occurs in position shown in Fig. 3, utilization can, in the alarm that transmits plane layer intercommunication transmission, switch the business to Protection path A1-A3-B4-B3-C4-C2, as new operating path; Due to not intercommunication of control plane signaling between territory, between territory, fault does not start dynamic recovery.
The 4th embodiment:
As shown in Figure 4, for the protection of 2+1 cross-domain end-to-end LSP mulitpath simultaneous faults recovers schematic diagram, be with above-mentioned three embodiment differences, between territory, configure the territory boundary node of 3.Wherein operating path is A1-A2-B1-B2-C2-C1, and Article 1 Protection path is A1-A3-B6-B3-C3-C1, and Article 2 Protection path is A1-A4-B5-B4-C4-C1.In the time that first place's fiber failure and second place's fiber failure occur between the territory shown in Fig. 4 simultaneously, business is by upper the Article 2 Protection path A1-A4-B5-B4-C4-C1 that is switched to fault not, as new operating path.If fiber failure occurs in territory, also can start the dynamic recovery to failure path, the principle of dynamically recovering is identical with above-mentioned three embodiment, repeats no more herein.
The 5th embodiment:
The present embodiment and above-mentioned four embodiment differences are: due to the restriction of region or other multiple condition, cannot between territory, configure plural territory boundary node, so can be by existing four territory boundary nodes between two territories, build between territory the interconnected Mesh network of node between two, many domain-to-domain links are provided.In figure, four-headed arrow solid line represents the two-way link of cross-domain end-to-end LSP operating path process; Four-headed arrow dotted line represents the two-way link of cross-domain end-to-end LSP Article 1 Protection path process; Four-headed arrow dotted line represents the two-way link of cross-domain end-to-end LSP Article 2 Protection path process; Double solid line represents can be used for the dynamic two-way link recovering in territory.
As shown in Figure 5, for the 2+1 cross-domain end-to-end LSP protection in the interconnected situation of Mesh between territory (wireless mesh) recovers schematic diagram.Although only have two territory boundary nodes between territory A, territory B, territory C, between territory, between four territory boundary nodes, be interconnected between two.The operating path of cross-domain end-to-end LSP and Article 2 Protection path common domain boundary node A2, B2; Article 1, Protection path and Article 2 Protection path common domain boundary node B4, C4; although this three paths has shared territory boundary node; but what use is different domain-to-domain link resources; can resist fault between twice territory; and Fig. 1 only has two to the domain-to-domain link of Fig. 3 embodiment, therefore can only resist fault between a territory.
When for the first time between territory fiber failure produce time, service protection is switched to Article 1 Protection path A1-A3-B4-B3-C4-C2.Owing to being inter-domain link fault, can not trigger dynamic recovery, the 2+1 protection group of service source node and destination node does not change; When for the first time between territory fiber failure do not recover; while there is again for the second time between territory fiber failure; business continues protection and is switched to Article 2 Protection path A1-A4-A2-B4-B2-C4-C3-C2, subsequent action with for the first time between territory fiber failure processing mode identical, repeat no more herein.
The present invention is not limited to above-mentioned execution mode, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, within these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a protection restoration methods for cross-domain end-to-end label switched path, is characterized in that, comprises the following steps:
S1. in each territory, set up respectively label switched path, then by domain-to-domain link, described label switched path is spliced, form 1 operating path and N bar Protection path, N >=1; And operating path is uncorrelated with Protection path route;
S2., when fault occurs, there is path in failure judgement:
If operating path, there is protection and switch in business, select a current not fault and the highest Protection path of priority become new operating path, business is switched, failure judgement position simultaneously, if territory, source, territory, place or intermediate field, one of the territory internal trigger occurring in fault gets around the Protection path of fault point, then with other territory in not the Protection path of fault be again spliced into a new Protection path; If between territory, the not reparation in triggering for generating fail operation path;
If Protection path, protection does not occur business switches, and newly in this territory triggers a Protection path, then with other territory in not the Protection path of fault be spliced into new Protection path;
In described step S1, the protection of cross-domain end-to-end label switched path is only configured in the Yu Hesu territory, source of business, between territory, have at least 2 interconnected, in Yu Hesu territory, source configuration N+1 protection group, i.e. 1 protected object, N object of protection, N >=1; When business is set up, the operating path at place is protected object, and N Protection path is object of protection, and remaining is points to unique protected object;
In described step S2, if operating path produces fault in Yu Huosu territory, source, the protection relationship change of the source node in Yu Huosu territory, guilty culprit source or destination node N+1 protection group, described new operating path can become protected object from object of protection, by producing the corresponding protected object of old operating path of fault, from protection group, delete simultaneously;
Each described Protection path configures identical protection priority in source node and two different N+1 protection groups of destination node; The new Protection path of described splicing, adds in N+1 protection group with the role of object of protection, and its protection priority is that this protection group is minimum.
2. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 1; it is characterized in that: in described step S1; set up the label switched path of the non-chummage of homology in the territory, source of business; set up the label switched path of non-homogeneous non-chummage at intermediate field; set up the label switched path of non-homogeneous chummage in territory, place, between adjacent two territories, use identical link circuit resource and label that each section of label switched path is stitched together.
3. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 1, is characterized in that: when described N=1, between territory, be 2 interconnected, at Yu Hesu territory, source configuration 1+1 protection group, i.e. 1 protected object, 1 object of protection.
4. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 1; it is characterized in that: in described step S2; if when the interior operating path fault of intermediate field; dynamic recovery can not triggered in Yu Hesu territory, source, and the protection relation of source node and destination node N+1 protection group does not change.
5. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 1; it is characterized in that: in described step S2; if between territory when operating path fault; the protection that source node and destination node only carry out business according to fault warning is switched, and source node and destination node N+1 protection group protection relation are unchanged.
6. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 1; it is characterized in that: in described step S2; if in territory when Protection path fault; if fault occurs in Yu Huosu territory, source; the source node in this territory or destination node are in N+1 protection group; for the new Protection path dynamically recovering adds corresponding object of protection, this object of protection points to the protected object under operating path.
7. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 6; it is characterized in that: in described step S2; if when Protection path fault, if fault occurs in intermediate field, the N+1 protection group protection relation of service source node and destination node is unchanged in territory.
8. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 1; it is characterized in that: in described step S2; if when Protection path fault, protection does not occur business switches between territory, service source node and destination node N+1 protection group protection relation are unchanged.
9. the protection restoration methods of cross-domain end-to-end label switched path as claimed in claim 1; it is characterized in that: shown in step S2; in the time that the operating path in N+1 protection group and many Protection paths break down simultaneously, described business is switched to the Protection path not breaking down.
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| CN103051374B (en) * | 2013-01-07 | 2018-11-09 | 南京中兴新软件有限责任公司 | Protect restoration methods and device |
| CN105337856B (en) * | 2014-08-13 | 2019-09-24 | 中兴通讯股份有限公司 | Cross-domain service processing method, apparatus and system |
| CN105991182B (en) * | 2015-02-13 | 2020-06-02 | 中兴通讯股份有限公司 | Path protection method and system |
| CN112995026A (en) * | 2019-12-13 | 2021-06-18 | 中兴通讯股份有限公司 | Link protection method, device, entry node and storage medium |
| CN114142993B (en) * | 2021-08-31 | 2023-04-07 | 北京邮电大学 | Fault recovery method, device, electronic equipment and medium for key distribution network |
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| CN1728645A (en) * | 2004-07-31 | 2006-02-01 | 华为技术有限公司 | Method for protecting operation of light transmission network |
| CN101162949A (en) * | 2006-10-13 | 2008-04-16 | 中兴通讯股份有限公司 | System and method for preventing from loop self-excited optical ring network channel sharing protection |
| CN101179419A (en) * | 2006-11-07 | 2008-05-14 | 中兴通讯股份有限公司 | Method of obtaining protection path of effectively used network resource |
| CN101227239A (en) * | 2008-01-29 | 2008-07-23 | 中兴通讯股份有限公司 | Method and system for protecting high speed wavelength division multiplexing system business |
| CN101997606A (en) * | 2009-08-25 | 2011-03-30 | 华为技术有限公司 | Node management method and control plane |
-
2012
- 2012-06-12 CN CN201210191023.6A patent/CN102740175B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1728645A (en) * | 2004-07-31 | 2006-02-01 | 华为技术有限公司 | Method for protecting operation of light transmission network |
| CN101162949A (en) * | 2006-10-13 | 2008-04-16 | 中兴通讯股份有限公司 | System and method for preventing from loop self-excited optical ring network channel sharing protection |
| CN101179419A (en) * | 2006-11-07 | 2008-05-14 | 中兴通讯股份有限公司 | Method of obtaining protection path of effectively used network resource |
| CN101227239A (en) * | 2008-01-29 | 2008-07-23 | 中兴通讯股份有限公司 | Method and system for protecting high speed wavelength division multiplexing system business |
| CN101997606A (en) * | 2009-08-25 | 2011-03-30 | 华为技术有限公司 | Node management method and control plane |
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