CN101958809B - Method for realizing shared recovery in ASON (Automatic Switch Optical Network) network based on packet switching - Google Patents
Method for realizing shared recovery in ASON (Automatic Switch Optical Network) network based on packet switching Download PDFInfo
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- CN101958809B CN101958809B CN2010105140611A CN201010514061A CN101958809B CN 101958809 B CN101958809 B CN 101958809B CN 2010105140611 A CN2010105140611 A CN 2010105140611A CN 201010514061 A CN201010514061 A CN 201010514061A CN 101958809 B CN101958809 B CN 101958809B
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Abstract
The invention discloses a method for realizing shared recovery in an ASON (Automatic Switch Optical Network) based on packet switching. The method comprises the following steps of: S10, sharing link bandwidth resources by a standby LSP (Logical Signal Processor) which corresponds to a working LSP and is unrelated to a plurality of resources, arranging configuration data and cross data to hardware along a path thereof; S20, respectively arranging into a cross correlation with the corresponding LSP in a source node and a destination node of the working LSP in the manner of 1:1 LSP protection; and S30, when the working LSP goes wrong, firstly switching the source node and the destination node of the working LSP to the standby LSP by the hardware, meanwhile informing fault information to the source node by a fault point, and then starting a signaling flow of a control plane to carry out an activation operation along a path of the standby LSP. In the invention, when the standby LSP for sharing the link bandwidth resources is established, cross information is arranged into the hardware, the standby LSP and the working LSP are correlated in the manner of bidirectional 1:1 LSP protection, and once the working LSP goes wrong, switching protection for services is completely realized by the hardware, and the service protection time is greatly shortened.
Description
Technical field
The present invention relates to network management, be specifically related to based on realizing sharing the method that formula is recovered in the ASON network of packet switch.
Background technology
In the ASON network, protection and the mode of recovering are provided to business.Comparatively speaking, the mode switching time of protection is short, and business recovery is fast, but the stock number that takies is bigger; The mode of recovering does not take resource in advance, just under the situation of traffic failure, just recomputates route, and therefore, the business recovery time is longer relatively.So a kind of new utilization ratio that can improve resource conservation takies less relatively resource conservation, and the short service restoration method of professional recovery time of more common reset mode has been suggested shared formula recovery that Here it is.
The thought of sharing formula recovery (Shared-Mesh Restoration) is based on the reset mode of pre-planned re-routing without extra-traffic end to end; The basic thought of this mode is: before the working LSP fault; Just, reserve resource conservation along restoration path, but this resource information just is present in control plane for it calculates a restoration path; Before the working LSP fault, the protection paths intersect really is not set to datum plane.Have only when working LSP breaks down, in the recovery flow process that control plane starts, activate, in current flow process, just datum plane information can be set precalculated subsequent use LSP.
Chinese invention patent " a kind of method of in grid network, utilizing shared backup channel to carry out fault recovery " (publication number is CN1556637) and " sharing the implementation method of grid network recovery " (publication number is CN1866806); All propose shared backup channel and carried out the method for business recovery; But; After above-mentioned two kinds of methods have mainly been described shared working LSP fault, share the concrete behavior that subsequent use LSP activates, concern be the behavior of signaling aspect.In the SDH of time-division system, what share is label resources, just the label time slot corresponding; For fear of causing conflict; The intersection information of subsequent use LSP is not actual to be set to Cross Trade, has only mainly just intersection can be set with lsp failure the time, and this is a kind of recovery but not protects; Therefore, the business recovery time still is long.
Summary of the invention
Technical problem to be solved by this invention is to solve long problem of business recovery time in the packet network.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopted provides a kind of based on the method that realizes sharing the formula recovery in the ASON network of packet switch, may further comprise the steps:
S10, the corresponding subsequent use LSP sharing link bandwidth resources of the incoherent working LSP of many resources, and the setting up in the process of subsequent use LSP, configuration data is set along its path and intersects data to hardware;
S20, in the source of working LSP, destination node is arranged to the cross correlation of the subsequent use LSP corresponding with it respectively according to the mode of 1:1 LSP protection;
S30, when working LSP breaks down; At first switch according to the mode of the 1:1 bidirectional protective of configuration by hardware; Source, the destination node of working LSP are switched on the subsequent use LSP, and simultaneously, fault point announcement fault message is to this source node; Restart the signaling process of control plane this moment, controls the activation manipulation of aspect along the path of subsequent use LSP.
In said method, the bandwidth sum of the subsequent use LSP of a plurality of sharing link bandwidth resources is greater than the available bandwidth of link.
In said method, among the step S30, the mode of 1:1 bidirectional protective is switched the APS signaling completion that is provided by hardware.
The present invention, because many corresponding subsequent use LSP sharing link bandwidth resources of the incoherent working LSP of resource, when subsequent use LSP sets up; Just intersection information is set to hardware; And to adopt the mode of two-way 1:1 LSP protection to carry out related with working LSP for it, in case current working LSP breaks down, then switches the protection of realization for business by hardware fully; The business recovery time generally can shorten the time of service protection less than 50ms greatly like this.
Description of drawings
Fig. 1: based on the ASON network topology of packet switch;
Fig. 2: shared formula the related of LSP and subsequent use LSP of resuming work;
Fig. 3: the service route before the working LSP fault;
Fig. 4: the switching services after the working LSP fault;
Fig. 5: the signaling process that shared subsequent use LSP activates.
Embodiment
The invention provides and realize in a kind of packet network sharing the method that formula is recovered, may further comprise the steps:
S10, the corresponding subsequent use LSP sharing link bandwidth resources of the incoherent working LSP of many resources, and the setting up in the process of subsequent use LSP, configuration data is set along its path and intersects data to hardware.That is to say that the link, node and the SRLG that are comprised in above-mentioned many working LSP are all inequality.
S20, in the source of working LSP, destination node is arranged to the cross correlation of the subsequent use LSP corresponding with it respectively according to the mode of 1:1 LSP protection;
S30, when working LSP breaks down; At first switch according to the mode of the 1:1 bidirectional protective of configuration by hardware; Source, the destination node of working LSP are switched on the subsequent use LSP, and simultaneously, fault point announcement fault message is to this source node; Restart the signaling process of control plane this moment, controls the activation manipulation of aspect along the path of subsequent use LSP.
Below in conjunction with accompanying drawing this method is made detailed explanation.
Fig. 1 is a kind of simple examples based on the ASON network topology of packet switch; This method is explained with network topology shown in Figure 1; But network topology shown in Figure 1 can not produce restriction to technical scheme of the present invention, and the present invention can be applied in the ASON network topology of more nodes.
A10, be the source with node A, node C is the place, sets up article one working LSP 1 through intermediate node B, and working LSP 1 path is L1+L2.
A20, set up the subsequent use LSP11 of working LSP 1 again, along the path of subsequent use LSP11 configuration parameter is set and intersects data, the path L3+L4+L5 of subsequent use LSP11 is through node D and node E.
The source of A30, working LSP 1, destination node are arranged to and subsequent use LSP11 cross correlation according to the mode of 1:1 LSP protection.Be shown as on the topology at node A, L3 protects L1; At node C, L5 protects L2, and is as shown in Figure 2.
A40, be the source with node F, node H is the place, sets up second working LSP 2 through intermediate node G, and the path is L8+L9.
A50, set up the subsequent use LSP21 of second working LSP 2 again,, along the path of subsequent use LSP21 configuration parameter is set and intersects data, the path L6+L4+L7 of subsequent use LSP21 also should pass through node D and node E.Because node D and node E are all passed through in the path of subsequent use LSP11 and subsequent use LSP21, therefore, subsequent use LSP21 and subsequent use LSP11 share the link circuit resource L4 between node D and the node E.What the SDH system of this programme and time-division was different is, what in the SDH of time-division system, share is label resources, and for fear of causing conflict, the intersection information of subsequent use LSP is not actual to be set to Cross Trade, only just intersection can be set main during with lsp failure; And this programme is applied in the packet network; Because label is not corresponding with bandwidth, this programme resources shared is actually bandwidth but not label, the more important thing is that bandwidth information can be multiplexing; Thereby intersection information is not mutual exclusion; So in this programme, sharing subsequent use intersection information can be provided with before the master is with lsp failure, can't form conflict.
The source of A60, working LSP 2, destination node are arranged to and subsequent use LSP21 cross correlation according to the mode of 1:1 LSP protection.Be shown as on the topology at node F, L6 protects L8, is L7 protection L9 at node H, and is as shown in Figure 2;
A70, subsequent use LSP21 and subsequent use LSP11 share the link circuit resource L4 between node D and the node E, thereby the shared formula that has formed subsequent use LSP is recovered structure.
Above embodiment; Be that example is explained only with two working LSP; But technical scheme provided by the invention goes for the incoherent working LSP of many resources (comprising link, node, SRLG) and shares the link circuit resource L4 between node D and the node E, because the bandwidth resources of subsequent use LSP on L4 can be multiplexing; So the bandwidth sum of the subsequent use LSP of a plurality of sharing link bandwidth resources can be greater than the available bandwidth of link, thereby bandwidth resources of having saved reserve link.
Concrete scheme is identical with the method for building up of LSP1, LSP11 and LSP2, LSP21, repeats no more at this.
After the shared formula of subsequent use LSP was recovered structure foundation, at network work just often, each business is moved on the path of working LSP 1 and LSP2 respectively, and was as shown in Figure 3; When the L1 path on the working LSP 1 produces fault, switch according to the mode of 1:1 LSP protection at Qi Yuan, destination node A, C, so switching services to the path of subsequent use LSP11, the service route of this moment is as shown in Figure 4; When hardware switches; Fault message can be announced to sharing the source node A that recovers in the fault point, restarts the signaling process of control plane this moment, along sharing the activation manipulation that aspect is controlled in the path of recovering subsequent use LSP11; Main operation is to judge the variation of bandwidth on the path and announce affected other subsequent use LSP; This operates not traffic affecting protection and switches, and signaling process is as shown in Figure 5, and this signaling process is a prior art.Likewise; When the L9 path on the working LSP 2 produces fault, switch according to the mode of 1:1 LSP protection at Qi Yuan, destination node F, H, so switching services is to the path of subsequent use LSP21; When hardware switches; Fault message can be announced to sharing the source node F that recovers in the fault point, restarts the signaling process of control plane this moment, along sharing the activation manipulation that aspect is controlled in the path of recovering subsequent use LSP21.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of under enlightenment of the present invention, making, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1. share the method that formula is recovered based on realizing in the ASON network of packet switch, it is characterized in that may further comprise the steps:
S10, many corresponding subsequent use LSP sharing link bandwidth resources of the incoherent working LSP of resource; And setting up in the process at subsequent use LSP; Configuration data is set along its path and intersects data to hardware, said resource comprises link, node, shared risk link group SRLG;
S20, in the source of working LSP, destination node is arranged to the cross correlation of the subsequent use LSP corresponding with it respectively according to the mode of 1:1 LSP protection;
S30, when working LSP breaks down; At first switch according to the mode of the 1:1 bidirectional protective of configuration by hardware; Source, the destination node of working LSP are switched on the subsequent use LSP, and simultaneously, fault point announcement fault message is to this source node; Restart the signaling process of control plane this moment, controls the activation manipulation of aspect along the path of subsequent use LSP.
2. as claimed in claim 1 based on realize sharing the method that formula is recovered in the ASON network of packet switch, the bandwidth sum of subsequent use LSP that it is characterized in that a plurality of sharing link bandwidth resources is greater than the available bandwidth of link.
3. the method for recovering based on the shared formula of realization in the ASON network of packet switch as claimed in claim 1 is characterized in that among the step S30 that the mode of 1:1 bidirectional protective is switched the APS signaling completion that is provided by hardware.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102811388B (en) * | 2011-06-02 | 2018-08-10 | 南京中兴新软件有限责任公司 | The business answering method and device of automatically switching optical networks |
| ES2681393T3 (en) | 2013-09-03 | 2018-09-12 | Huawei Technologies Co., Ltd. | Method, controller, device and protection system of a service route |
| CN110392318B (en) * | 2019-07-29 | 2021-10-19 | 烽火通信科技股份有限公司 | Method and system for checking control plane layer LSP (Label switched Path) in ASON (automatic switched optical network) |
| CN113727220B (en) * | 2020-05-26 | 2023-04-11 | 华为技术有限公司 | Service resource pre-configuration method, device and system |
| CN117856883A (en) * | 2020-09-27 | 2024-04-09 | 华为技术有限公司 | Service protection method and network node |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101626527A (en) * | 2009-08-19 | 2010-01-13 | 烽火通信科技股份有限公司 | Recoverable shared restoration method for optimizing spare routing by automatic switched optical network (ASON) |
| US7652983B1 (en) * | 2001-06-25 | 2010-01-26 | At&T Intellectual Property Ii, L.P. | Method for restoration and normalization in a mesh network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7652983B1 (en) * | 2001-06-25 | 2010-01-26 | At&T Intellectual Property Ii, L.P. | Method for restoration and normalization in a mesh network |
| CN101626527A (en) * | 2009-08-19 | 2010-01-13 | 烽火通信科技股份有限公司 | Recoverable shared restoration method for optimizing spare routing by automatic switched optical network (ASON) |
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