CN100372305C - Service protective method - Google Patents
Service protective method Download PDFInfo
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- CN100372305C CN100372305C CNB2005100362056A CN200510036205A CN100372305C CN 100372305 C CN100372305 C CN 100372305C CN B2005100362056 A CNB2005100362056 A CN B2005100362056A CN 200510036205 A CN200510036205 A CN 200510036205A CN 100372305 C CN100372305 C CN 100372305C
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Abstract
The present invention discloses a service protection method which comprises the following steps: a. protection modes of a working channel and a protection group of a protection channel are adopted for a service; b. when the channel in the protection group is interrupted, the corresponding interrupted channel is restored according to a sharing protection mode, and thus, a new protection group is formed to protect the service. The present invention effectively combines the 1+1/1: 1 protection mechanism and the share restoring mechanism of an intelligent service, and thereby, an ASON optical network service is protected sufficiently, quickly and effectively in an effective network resource. Thus, the continuity of the service is ensured, and the present invention has high applicability for a high-level service.
Description
Technical field
The present invention relates to ASON (ASON, Automatically Switched OpticalNetwork) technology, relate in particular to the service protecting method among a kind of ASON.
Background technology
ASON is the optical transfer network of new generation that can intelligently finish optical-fiber network exchange linkage function automatically, it is on the basis of the automatic discovery of Internet resources and topological structure, call dynamic and intelligent routing algorithm, handle and alternately, set up automatic as required end to end exchange and connect by distributed signaling.
In order to finish above-mentioned automatic exchange linkage function, ASON must possess some basic functions, comprises discovery feature (as neighbours' discovery, Topology Discovery, service discovering etc.), routing function, signaling capability etc.
The professional connection by above-mentioned automatic exchange transmits in an ASON network.In network, business there is the kinds of protect mode; specifically comprise 1+1 protection, protection in 1: 1, share protect; wherein 1+1 protection adopts the mode of dual transmitting and receiving; when the teleservice of setting up between 2; set up the two strip label switching paths (LSP, Label Switch Path) of service aisle and protection passage simultaneously, when service aisle LSP breaks down; switch to fast on the LSP of protection passage, make business obtain fast quick-recovery.
When this kind mode breaks down when the protection passage, because service operation is therefore professional unaffected on service aisle.When service aisle broke down, business automatically switched to the protection passage, and business is protected fast.When faulty channel recovers, the requirement when setting up according to business, business can be selected to return to service aisle and still keep present situation constant.
But under this protected mode, if under the situation that service aisle interrupts, the protection passage also interrupts this moment, and just do not have the path to send and to receive professional this moment.
In addition; adopt the mode of resource reservation for protection in 1: 1; the same with 1+1 protection; set up service aisle and two LSP of protection passage when adopting this mode to set up teleservice simultaneously; but have only service aisle LSP to go up bearer service, protection passage LSP reserves, when service aisle LSP breaks down; business switches on the protection passage LSP again, and business is restored.This kind mode is owing to need to reserve the resource of protection passage LSP, and resource requirement is more.
The share protect mode then belongs to a kind of protected mode that the whole network is shared; under this mode, when setting up teleservice, set up the LSP of a job, when this LSP breaks down; initiate to rebulid a new LSP by the source end and make business recovery; finish protection, but under this mode, the business recovery time is long to business; and only set up a new passage; when passage broke down once more, it was slow to carry out professional recovery, is not suitable for business-level than higher business.
To sum up, progressively increase recovery time professional in above-mentioned three kinds of service protection modes, is respectively 1+1 protection＜1: 1 protection＜share protect.And, when service aisle LSP and protection passage LSP break down, professionally just interrupt fully for the protected mode of 1+1 and 1: 1.
Summary of the invention
The technical problem that the present invention solves provides a kind of guard method of ASON business; with under the effective situation of Internet resources; keep the two passes of 1+1 or 1: 1 service protection group to form the protected mode of work and protection all the time, thereby the protection mechanism fast and effectively to the business in the ASON is provided.
For addressing the above problem, service protecting method of the present invention comprises:
A, business adopted the protected mode of forming the protection group by service aisle and protection passage;
Recover the passage of respective interrupt when passage interrupts in b, the described protection group according to the share protect mode, form new protection group and carry out service protection.
Wherein, service aisle interrupts in the described protection group, and step b comprises:
Business is switched to the protection passage, make the protection passage as new service aisle;
Described new service aisle is set up new protection group and is carried out service protection.
Wherein, the protection passage interrupts in the described protection group, and step b comprises:
Recover described protection passage according to the share protect mode, and set up new protection group with service aisle and carry out service protection.
Wherein, a described protection group passage wherein interrupts, and another passage does not interrupt yet before this passage also begins to recover, and step b comprises:
Initiate to set up the protection group of service aisle and protection passage according to the share protect mode, and be set to new protection group and carry out service protection.
Wherein, a described protection group passage wherein interrupts, and another passage also interrupts when this passage is recovering, and step b comprises:
Before wherein a passage is generating new recovery passage according to the share protect mode; forbid the newly-built recovery of an other passage; after treating that last passage finished recovery according to the share protect mode; start another passage of reconstruction according to the share protect mode, two passes is set to new protection group and carries out service protection.
Wherein, a described protection group passage wherein interrupts, and also interrupts at this another passage of routing restoration failure back, and step b comprises:
Rebulid service aisle and protection passage immediately according to the share protect mode, and be set to new protection group and carry out service protection.
Wherein, a passage in the described protection group interrupts, and step b comprises:
In this passage, have no progeny this passage is recovered according to the share protect mode,, initiate the recovery of this passage after waiting for a period of time once more, up to this routing restoration if recover this passage failure.
Wherein, described protection group can adopt the 1+1 protection mode.
Wherein, described protection group can adopt 1: 1 protected mode.
Compared with prior art, the present invention has the following advantages:
The present invention adopts the protected mode of service aisle and protection channel protection group to business, and the passage that according to share protect mode recovers respective interrupt when having passage to interrupt in described protection group carries out service protection.The 1+1/1 of effective fusion IN service: 1 protection mechanism and shared Restoration Mechanism; thereby in effective network source, can protect more fully the ASON optical network service fast and effectively; guaranteed professional continuity, very high applicability has been arranged for the high business of business-level.
Description of drawings
Fig. 1 is the principle schematic of prior art share protect mode;
Fig. 2 is a kind of ASON network diagram that the specific embodiment of the invention is used;
Fig. 3 carries out 1+1/1 in the network shown in Figure 2: the schematic diagram of 1 protection;
Fig. 4 is 1+1/1: the schematic diagram that 1 protection is switched;
Fig. 5 is the end-to-end recovery schematic diagram of having no progeny in the service aisle of the present invention;
Fig. 6 is that the present invention protects the end-to-end recovery schematic diagram of having no progeny in the passage.
Embodiment
The present invention can be applied in single ASON network domains; also can be applied in the network environment of a plurality of ASON network domains; its core is the 1+1/1 by ASON: the fusion of 1 protection and the shared protection mechanism of recovering realizes professional reliably protecting; also promptly business is adopted the 1+1/1 of service aisle and protection channel protection group: 1 protected mode; at described 1+1/1: the passage that recovers respective interrupt when the passage of 1 protected mode interrupts according to the share protect mode; form new 1+1/1: 1 protection group is carried out service protection; thereby realize the permanent 1+1/1 of IN service: the protection mechanism of 1 business; fast and effectively optical network service is protected and is recovered, below specific embodiment describe.
At first the principle that the share protect of the present invention's application is recovered describes.
Share protect belongs to a kind of protected mode that the whole network is shared; under this mode, when setting up teleservice, set up a LSP, when certain bar link breaks down among this LSP; by the node notification source node that detects fault, initiate to rebulid a new LSP by the source end and make business recovery.As shown in Figure 1, set up the connection of a share protect mode from node A to node G in the drawings, access path is A-F-G.When the F-G link breaks down, the F node detection is to this link failure, the F node sends Notify message (if through intermediate node by the RSVP signaling protocol to the first node A that connects, directly transmit this Notify message to the first node that connects), after first node A receives Notify message, initiate new establishment of connection, establishment step is as follows:
1, get rid of the link break down, to the routing information of routing module inquiry from the A node to the G node, routing module is through the route computational algorithm, obtain the optimal path from A to G after, return to signalling module.As shown in Figure 1, the routing module path of calculating is A-D-E-G.
2, after signalling module obtains routing information that route returns, send Path message to next node, and reserved resource;
3, after downstream node receives the Path message of upstream node transmission, carry out respective handling, continue to send Path message to downstream node, and reserved resource, up to destination node;
4, after destination node receives Path message, handle upstream nodes loopback Resv message accordingly;
5, after upstream node receives Resv message, carry out continuing upstream to send Resv message after the resource connection processing, receive Resv message up to first node, so far the protection process of share protect mode is finished.
The present invention is for 1+1/1: when the service aisle of 1 mode and/or protection passage interrupted, can carry out the recovery of respective interrupt passage by above-mentioned sharing mode, thereby guarantee 1+1/1: the two passes of 1 service protection group formed the protected mode of work and protection all the time.
With reference to figure 2, this figure is 1+1/1: a kind of network environment schematic diagram of 1 protection.
As shown, at the ASON of these 7 nodes network, adopt 1+1/1: 1 protected mode is set up an intelligent teleservice from node A to node G, and the 1+1/1 after the mode that adopts node to separate is set up: 1 business as shown in Figure 3.Service aisle LSP is by A-F-G in the protection group of service protection, and protection passage LSP is A-B-C-G.
For 1+1 service protection mode; adopt the mode of dual transmitting and receiving to carry out professional transmission and reception at node A and G; in Fig. 3; what solid line was represented is exactly professional true transmission and reception condition; dotted line is represented professional mode of carrying out selective reception at node G; set up the subnet protection group of A-B and A-F and C-G and F-G respectively at source end A and place end G, in Fig. 3, selection to be that the solid line direction receives professional.
For 1: 1 service protection mode, service aisle LSP was A-F-G, and protection passage LSP is A-B-C-G, and is professional by service aisle LSP transmission, and protection passage LSP is transport service not.
According to normal ASON network 1+1 protection mechanism, when service aisle LSP broke down, professional transmitting terminal did not need to carry out the professional change action that sends, and carried out the professional switching that receives at professional receiving terminal and had just finished protection to the fault business.
And for 1: 1 protection mechanism of ASON network, when service aisle A-F-G broke down, professional source end and destination need switch to business on the protection passage A-B-C-G from service aisle by protocol negotiation.By protecting the back business as shown in Figure 4.If but breaking down once more on the service link this moment, node A has just interrupted to the business of node G so.
In this case,, can adopt the 1+1/1 of ASON according to protected mode of the present invention: 1 and the combinations that share to recover two kinds of protection Restoration Mechanism, form permanent 1+1/1: 1 guard method.
When specific implementation of the present invention, can timer T1 overtime as starting the trigger condition that the passage that interrupts recovers, the trigger condition that the overtime passage continuation of interrupting as routing restoration failure back startup of timer T2 recovers is described in detail with the different situation of branch shown in Figure 3 below.
Service aisle interrupts in the protection group
Situation for service aisle interrupts at first switches to business the protection passage, makes the protection passage as new service aisle; Then with the service aisle that interrupts as new protection passage, and recover the service aisle of described interruption according to the share protect mode, set up new protection with described new service aisle and consist of 1+1/1: 1 protection group is carried out service protection.
During specific implementation, have no progeny in service aisle, professional receiving terminal can carry out the professional switching that receives automatically, finishes the protection to the fault business, and protection back business as shown in Figure 4.
Interrupt owing to service aisle simultaneously; business switches to original protection passage; in order at any time to form permanent 1+1/1: 1 protection to business; need to adopt the mode of sharing recovery that service aisle is recovered; promptly having no progeny in service aisle, (timer T1 is overtime) initiates to rebulid a new LSP at the service source end behind the certain hour; original service aisle is recovered; delete old subnet protection service groups; in the source; the place end is set up new subnet protection group; as new LSP is A-D-E-G; at source end deletion A-B; the subnet protection group of A-F is set up A-B; the subnet protection group of A-D is at deleting termination sinks C-G; the subnet protection group of F-G; set up C-G; the subnet protection group of E-G, at this moment, original protection passage A-B-C-G becomes service aisle; newly-established service channel A-D-E-G is set to the protection passage of new service aisle, and by permanent 1+1/1: the teleservice after 1 protection as shown in Figure 5.
If service aisle originally can not in time be restored, can initiate to set up new LSP again by timing (timer T2) and attempt recovering.
The protection passage interrupts in the protection group
Situation about interrupting for protection passage the present invention can recover described protection passage according to the share protect mode, and sets up new protection with service aisle and consist of 1+1/1: 1 protection group is carried out service protection.
During specific implementation; in the protection passage, have no progeny; business is still on service aisle; professional unaffected; professional receiving terminal can not carry out the professional switching that receives; but in order at any time to form permanent 1+1/1: 1 protection to business; need to adopt the mode of sharing recovery that the protection passage is recovered, (timer T1 is overtime) can initiate to set up a new LSP too at the service source end behind the certain hour of promptly having no progeny in the protection passage, and the protection passage is recovered; delete old service protection group; for example, for the 1+1 mode, new LSP is A-D-E-G; at source end deletion A-B; the subnet protection group of A-F is set up A-B; the subnet protection group of A-D is at deleting termination sinks C-G; the subnet protection group of F-G; set up F-G, the subnet protection group of E-G.At this moment; original service aisle A-B-C-G remains unchanged; newly-established A-D-E-G is set to protect passage, and by permanent 1+1/1: teleservice after 1 protection such as the A-D-E-G of figure are set to protect passage, and by permanent 1+1/1: the teleservice after 1 protection as shown in Figure 6.
If protection passage originally can not in time be restored, can initiate to set up new LSP again by timing (timer T2) and attempt recovering.
Need to prove that above-mentioned for 1+1/1: a passage in the 1 protection group interrupts, in this passage, have no progeny and recover this passage failure that the back of then can waiting for a period of time (for example overtime back of timer T2) initiates the recovery of this passage once more, up to this routing restoration.
For 1+1/1: the situation of working and protecting passage all to interrupt in the protection group of 1 protected mode
This situation occurs in when a passage interrupts, and when an other passage also interrupts, for this situation, multiple possible scene is arranged, for example:
A, a passage interrupt, and another passage does not interrupt yet before this passage also begins to recover;
B, a passage interrupt, and another passage also interrupts when this passage is recovering;
C, a passage interrupt, and also interrupt at this another passage of routing restoration failure back;
For situation A, when two passes all interrupts, stop the timer T1 of current routing restoration, initiate 1+1/1 immediately according to the share protect mode: 1 work and protection the rebuliding of passage, and be set to new protection group and form 1+1/1: 1 protection.
For situation B; before wherein a passage is generating new recovery passage according to the share protect mode; forbid the newly-built recovery of an other passage; after treating that last passage finished recovery according to the share protect mode; also start and rebuild another passage according to the share protect mode; two passes is set to new subnet protection group, and forms 1+1/1: 1 protection.
For situation C, a routing restoration failure when an other passage also interrupts, rebulids 1+1/1 immediately according to the share protect mode: 1 protected mode service aisle and protection passage, and be set to new protection group formation 1+1/1: 1 protection.
The above only is a preferred implementation of the present invention, should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement and profit
Claims (9)
1. a service protecting method is applied to it is characterized in that in the ASON, comprising:
A, business adopted the protected mode of forming the protection group by service aisle and protection passage;
Recover the passage of respective interrupt when passage interrupts in b, the described protection group according to the share protect mode, form new protection group and carry out service protection.
2. service protecting method according to claim 1 is characterized in that, service aisle interrupts in the described protection group, and step b comprises:
Business is switched to the protection passage, make the protection passage as new service aisle;
Recover the service aisle of described interruption according to the share protect mode, and, set up new protection group with described new service aisle and carry out service protection as new protection passage.
3. service protecting method according to claim 1 is characterized in that, the protection passage interrupts in the described protection group, and step b comprises:
Recover described protection passage according to the share protect mode, and set up new protection group with service aisle and carry out service protection.
4. service protecting method according to claim 1 is characterized in that, a described protection group passage wherein interrupts, and another passage does not interrupt yet before this passage also begins to recover, and step b comprises:
Initiate to set up service aisle and the dwarf protects the protection group of passage according to the share protect mode, and be set to new protection group and carry out service protection.
5. service protecting method according to claim 1 is characterized in that, a described protection group passage wherein interrupts, and another passage also interrupts when this passage is recovering, and step b comprises:
Before wherein a passage is generating new recovery passage according to the share protect mode; forbid the newly-built recovery of an other passage; after treating that last passage finished recovery according to the share protect mode; start another passage of reconstruction according to the share protect mode, two passes is set to new protection group and carries out service protection.
6. service protecting method according to claim 1 is characterized in that, a described protection group passage wherein interrupts, and also interrupts at this another passage of routing restoration failure back, and step b comprises:
Rebulid service aisle and protection passage immediately according to the share protect mode, and be set to new protection group and carry out service protection.
7. service protecting method according to claim 1 is characterized in that, a passage in the described protection group interrupts, and step b comprises:
In this passage, have no progeny this passage is recovered according to the share protect mode,, initiate the recovery of this passage after waiting for a period of time once more, up to this routing restoration if recover this passage failure.
8. according to each described service protecting method of claim 1-7, it is characterized in that described protection group adopts the 1+1 protection mode.
9. according to each described service protecting method of claim 1-7, it is characterized in that described protection group adopts 1: 1 protected mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100362056A CN100372305C (en) | 2005-07-28 | 2005-07-28 | Service protective method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100362056A CN100372305C (en) | 2005-07-28 | 2005-07-28 | Service protective method |
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| CN1859157A CN1859157A (en) | 2006-11-08 |
| CN100372305C true CN100372305C (en) | 2008-02-27 |
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| CNB2005100362056A Expired - Fee Related CN100372305C (en) | 2005-07-28 | 2005-07-28 | Service protective method |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101345590B (en) * | 2008-08-22 | 2013-08-07 | 中兴通讯股份有限公司 | SNCP business collocation method |
| CN101605282B (en) | 2009-06-26 | 2012-07-04 | 中兴通讯股份有限公司 | System, method and device for protecting optical network |
| CN101656897B (en) * | 2009-08-31 | 2013-01-02 | 东北大学 | Method for grooming multilayer multi-granularity traffic in waveband switching optical network |
| CN101656896B (en) * | 2009-08-31 | 2013-02-13 | 东北大学 | Method for grooming dynamic multi-granularity traffic in reconfigurable heterogeneous waveband switching optical network |
| CN101656572B (en) * | 2009-09-02 | 2012-07-25 | 烽火通信科技股份有限公司 | Method for realizing permanent shared restoration in ASON network |
| CN101834710B (en) * | 2010-04-30 | 2014-02-05 | 中兴通讯股份有限公司 | Method and system for controlling protection switching in plane protection group of automatic switch optical network (ASON) |
| CN102143065B (en) * | 2011-02-09 | 2014-02-19 | 华为技术有限公司 | Fault protection method and equipment |
| CN112019261B (en) * | 2019-05-31 | 2022-02-08 | 烽火通信科技股份有限公司 | Method and system for returning distributed control plane electrical layer 1+1 service |
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| US20030161304A1 (en) * | 2002-02-28 | 2003-08-28 | Nortel Networks Limited | Methods, devices and software for combining protection paths across a communications network |
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| US20030161304A1 (en) * | 2002-02-28 | 2003-08-28 | Nortel Networks Limited | Methods, devices and software for combining protection paths across a communications network |
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