CN101686094A - Path protection method and system of service transport network - Google Patents
Path protection method and system of service transport network Download PDFInfo
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- CN101686094A CN101686094A CN200810189656A CN200810189656A CN101686094A CN 101686094 A CN101686094 A CN 101686094A CN 200810189656 A CN200810189656 A CN 200810189656A CN 200810189656 A CN200810189656 A CN 200810189656A CN 101686094 A CN101686094 A CN 101686094A
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Abstract
The embodiment of the invention relates to the communication transmission field, in particular discloses a path protection method and a system of a service transport network. The method comprises thefollowing steps: dynamically adjusting the bandwidth of each service path in at least more than two service path protection groups with the same source and destination nodes, and allowing the destination nodes to switch the path receiving the services from the service paths suffering from first faults to the service paths with the lowest priority when the destination nodes detect that other service paths except the service paths with the lowest priority suffer from first faults. The system comprises a dynamic adjusting module, destination nodes and source nodes. By establishing the path protection groups with the same source and destination nodes and dynamically adjusting the bandwidth of each service path in the protection groups, the invention solves the problem that the transport networks with bandwidth being dynamically adjusted can not be effectively protected in the prior art, improves the reliability of the transmission network performance and simultaneously increases the resource utilization ratio of the bandwidth.
Description
Technical field
The present invention relates to field of communication transmission, relate in particular to a kind of channel protection method and system of service transport network.
Background technology
Transmit network by the transmission of multiplexed mechanism realization to the branch road subscriber signal.A transmission network comprises a series of network elements of interconnection physically, physical connection section of becoming (section) or circuit between network element, and a specific tributary signal becomes passage (path) from end-to-end by the path of transmitting network.In SDH (synchronous digital hierarchy), a passage is by a virtual container (VC-N) and path overhead (POH) expression related with it, and this passage is not in case after setting up, its size and position can change.Section overhead (SOH) expression of the Synchronous Transport Module level-N of the Duan Youyi between the network element (STM-N) transmission frame and its correspondence.
A basic demand that transmits network is professional availability (availability), therefore need provide protection mechanism to transmitting network, makes that the business of transmitting on the service aisle of fault is recovered by an alternate channel.Protection mechanism has been widely used and standardization, below is several SDH protect networks mechanism described in the prior.
Segment protect (section protection) is meant the protection to physical circuit between two network elements, comprises 1+1MSP (multiplex section protection), 1:N MSP and MS-SPRING (Multiplex Section Shared Protection Ring).When service aisle breaks down, switching services all on the service aisle is transmitted to the protection passage.
Path protection (path protection) is meant a passage or its one section protection.Description of the Prior Art the SDH 1+1 path protection mechanism of SNCP (SNCP).Business on the service aisle is bridged on the protection passage in that the source end is permanent, and Su Duan receives professional according to channel status from work or protection passage choosing.
Define the protection mechanism of 1:N even M:N at present in the standard, used 1 and N service aisle of M protection path protection respectively.Though 1+1 protection has improved flexibility and bandwidth availability ratio relatively, but still has some restrictions: work that the needs configuration is fixing and protection passage number.Can only be protected by special protection passage, when the protection channel resource was not enough, the part service aisle may can not get protection.
In order to address the above problem, prior art has proposed improving one's methods of a kind of optical-fiber network linear protection again, be used for the optical network service passage that has fault is protected, it may further comprise the steps: for participating in the service channel configuration fixed priority of optical-fiber network linear protection, the priority that service channel institute bearer service is set is service priority, and it is identical with fixed priority that its service priority is set; From the service channel that participates in linear protection, select service channel that service priority is lower than fault service channel fixed priority as the protection passage, and the professional bridge joint of fault service channel is switched to the protection passage.The prior art provides when any one service channel breaks down, and seeks the low service channel of priority automatically and protects the method for fault service channel, and promoted protected mode configuration flexibility and the fail safe that has increased optical network service.
But the inventor is in research process, finds that prior art be that all channel sized unanimities and immutable do not consider to protect the bandwidth of passage whether enough in its protection group when switching based on the fixing transmission technology of time slot such as SDH, OTN.For the transmission network that dynamic bandwidth is adjusted, this kind can't be suitable for based on the fixing transmission technology of time slot.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of channel protection method and system of service transport network, has solved the problem that can't effectively protect for the transmission network of dynamic bandwidth adjustment in the prior art, has improved the reliability of transmission network performance.
The embodiment of the invention provides a kind of channel protection method of service transport network, comprises,
Dynamically adjust the bandwidth of each service channel in the protection group of plural at least service channel P1 with identical sources destination node, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, bandwidth with the service channel of bandwidth maximum in the protection group is a benchmark, and the bandwidth of the service channel Pn of adjustment lowest priority is more than or equal to the bandwidth of the service channel of other priority; The priority of service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn;
When destination node detects other service channel except that Pn first fault takes place, destination node will receive professional passage and switch service channel Pn into lowest priority by the service channel of first fault, and send the first bridge joint request and the first bridged appearances information to source node;
Source node is according to the first bridge joint request and the first bridged appearances information that receive, business on the service channel of first fault is bridged on the service channel Pn of lowest priority, and the priority of the service channel Pn of lowest priority is adjusted into the priority of the service channel of first fault;
Destination node with the switching services on the service channel of first fault to the service channel Pn of lowest priority.
The embodiment of the invention also provides a kind of path protection system of service transport network, comprises,
Dynamic adjusting module, be used for dynamically adjusting the bandwidth of each service channel in the protection group of plural at least service channel P1 with identical sources destination node, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, bandwidth with the service channel of bandwidth maximum in the protection group is a benchmark, and the bandwidth of the service channel Pn of adjustment lowest priority is more than or equal to the bandwidth of the service channel of other priority; The priority of service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn;
Destination node when being used to detect other service channel except that Pn first fault taking place, is switched service channel Pn into lowest priority with receiving professional passage by the service channel of first fault, and is sent the first bridge joint request and the first bridged appearances information;
Source node, be used for according to the first bridge joint request and the first bridged appearances information that receive, business on the service channel of first fault is bridged on the service channel Pn of lowest priority, and the priority of the service channel Pn of lowest priority is adjusted into the priority of the service channel of first fault;
Destination node also is used for the service channel Pn of the switching services on the service channel of first fault to lowest priority.
This shows; in embodiments of the present invention; the channel protection group that has the identical sources destination node by foundation; dynamically adjust the bandwidth of each service channel in the protection group; when service channel breaks down; with the business on the service channel that breaks down; switch the minimum passage of other service channel medium priority to the protection group; solved the problem that effectively to protect for the transmission network of dynamic bandwidth adjustment in the prior art; improve the reliability of transmission network performance, improved the bandwidth resources utilance simultaneously.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute limitation of the invention.In the accompanying drawings:
Fig. 1 shows the channel protection method flow chart of the service transport network in the embodiment of the invention one;
Fig. 2 shows the path protection network architecture diagram of the service transport network in the embodiment of the invention one;
Fig. 3 shows the path protection system schematic of the service transport network in the embodiment of the invention two.
Embodiment
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
The channel protection method flow chart of the service transport network in the embodiment of the invention one as shown in Figure 1.
Step 101, dynamically adjust the bandwidth of each service channel in the protection group of plural at least service channel P1 with identical sources destination node, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, bandwidth with the service channel of bandwidth maximum in the protection group is a benchmark, and the bandwidth of the service channel Pn of adjustment lowest priority is more than or equal to the bandwidth of the service channel of other priority; The priority of service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn.
Step 102, when destination node detects other service channel except that Pn first fault takes place, destination node will receive professional passage and switch service channel Pn into lowest priority by the service channel of first fault, and send the first bridge joint request and the first bridged appearances information to source node.
Step 103, source node is according to the first bridge joint request and the first bridged appearances information that receive, business on the service channel of first fault is bridged on the service channel Pn of lowest priority, and the priority of the service channel Pn of lowest priority is adjusted into the priority of the service channel of first fault.
Step 104, destination node with the switching services on the service channel of first fault to the service channel Pn of lowest priority.
The embodiment of the invention can further include,
Before above-mentioned dynamic adjustment step, comprise that further setting up plural at least service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn with identical sources destination node is the protection group.The priority of service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn.The priority of each service channel can be determined by each passage loaded service priority, manual configuration in the time of also can passing through to create the protection group.
The embodiment of the invention can further include,
After destination node detects above-mentioned first fault recovery, destination node stops to send the first above-mentioned bridge joint request and the first bridged appearances information, after the time of setting arrives, destination node is switched back the passage pickup services of first fault recovery, source node stops the business on the service channel of bridge joint first fault, business on the service channel Pn of the lowest priority that recovery is seized, and the priority of the service channel of lowest priority is adjusted into lowest priority PPn before the bridge joint.The time-delay of above-mentioned setting-up time may realize by timing device such as timers.
The embodiment of the invention can further include,
Dynamically the bandwidth of the service channel Pn-1 of the inferior lowest priority of adjustment service channel is, more than or equal to the bandwidth of other service channel except that the service channel Pn of lowest priority;
When second fault takes place in the service channel Pn that detects lowest priority when destination node, destination node will receive professional passage and switch service channel Pn-1 into inferior lowest priority by the service channel Pn of lowest priority, and send the second bridge joint request and the second bridged appearances information to source node;
Source node is according to the second bridge joint request and the second bridged appearances information that receive, business on the service channel Pn of lowest priority is bridged on the service channel Pn-1 of time lowest priority, and the priority P Pn-1 of the service channel of inferior lowest priority is adjusted into the priority of the service channel of first fault.If the service channel Pn-1 of time lowest priority also breaks down, then loaded service on it to be proceeded to adjust, the method for adjustment of use and above-mentioned set-up procedure are similar, do not repeat them here.
The embodiment of the invention can further include,
Bandwidth W1, the W2 of dynamic adjustment service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn ... Wn is a benchmark with W1, adjustment W1, W2 ... Wn is: W1≤W2≤...≤Wn.Protection is formed when building; if each bandwidth chahnel is inconsistent; or the bandwidth of low-priority channel is not more than the bandwidth that equals than its priority high channel; then by the dynamic bandwidth adjustment; be adjusted into the bandwidth of all passages identical; or the bandwidth of low-priority channel conveniently realizes the interchannel protection of seizing more than or equal to the bandwidth than its priority high channel.
The embodiment of the invention can further include,
After the bandwidth adjustment request information of any one passage Pm in receiving service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, according to bandwidth adjustment request information, calculate new bandwidth Wm, judge whether bandwidth Wm+1, the Wm-1 of adjacency channel Pm+1, the Pm-1 of Wm and this request channel Pm satisfies: Wm+1 〉=Wm 〉=Wm-1; If satisfy, then distribute bandwidth Wm to Pm; If do not satisfy Wm+1 〉=Wm 〉=Wm-1, whether then judge Wm less than Wm-1, if less than, then do not adjust the bandwidth of Pm; If Wm greater than Wm+1, then adjusts the bandwidth of Wm+1, make Wm+1 〉=Wm.
If after adjusting, the bandwidth of all passages do not satisfy W1≤W2≤...≤Wn, then adjust the Wm+2 bandwidth more successively, make it be not less than Wm+1, adjust again successively Wm+3 ..., the Wn bandwidth, finally distribute bandwidth to respective channel by adjusted Wm+1......Wn.
By above description as can be seen; when detecting the channel failure of high priority; the passage of choosing current lowest priority in the protection group according to priority rule is as protecting passage (because each bandwidth chahnel guarantees to be not less than other high-priority channel bandwidth in the protection group; therefore bandwidth can be guaranteed), and will protect the priority of passage to be adjusted into the priority of protected passage.Switching with recovery process after the bridge joint is the same, repeats no more herein.
The embodiment of the invention one can also be specially,
Step 201, setting up service channel P1, P2, P3 with identical sources destination node is the protection group, the priority of service channel P1, P2, P3 is: PP1＞PP2＞PP3.
Step 202 is dynamically adjusted bandwidth W1, W2, the W3 of service channel P1, P2, P3, is benchmark with W1, adjusts W2, W3 and is: W3 〉=W1, W3 〉=W2.
Step 203, when destination node detected service channel P1 and breaks down, destination node was switched the service channel that receives and is the minimum P3 of priority by P1, and sends the first bridge joint request and the first bridged appearances information to source node.
Step 204, source node is bridged to the business on the P1 passage on the P3, and the priority of P3 is adjusted into PP1 according to the first bridge joint request and the first bridged appearances information that receive.
Step 205, destination node is bridged to the business on the P1 passage on the P3.
The embodiment of the invention can further include, after destination node detects passage P1 fault recovery, destination node stops to send the first bridge joint request and the first bridged appearances information, after the time of setting arrives, destination node is switched back passage P1, collects the business of passage P1, and source node stops the business of bridged appearances P1, the business of the passage P3 that recovery is seized, and the priority of P3 is adjusted into PP3.
The embodiment of the invention can further include, and dynamically adjusts bandwidth W1, the W2 of service channel P1, P2, is benchmark with W1, adjusts W2:W2 〉=W1; When destination node detected passage P3 and breaks down, destination node was switched the passage that receives and is the minimum P2 of priority by P3, and sends the second bridge joint request and the second bridged appearances information to source node; Source node is bridged to the business on the P3 passage on the P2, and the priority of P2 is adjusted into PP1 according to the second bridge joint request and the second bridged appearances information that receive.
The embodiment of the invention can further include, and dynamically adjusts bandwidth W1, W2, the W3 of service channel P1, P2, P3, is benchmark with W1, and adjustment W1, W2, W3 are: W3 〉=W2 〉=W1.
The path protection network architecture diagram of the service transport network in the embodiment of the invention one as shown in Figure 2.
Module N1, N2 represent source node, destination node respectively, modules A, B, C, D, E, F represent respectively source node N1, destination node N2 six network elements of process, A, D network element have been formed service channel P1, and B, E network element have been formed service channel P2, and C, F network element have been formed service channel P3.Four-headed arrow shows that above-mentioned three passages can be duplex channel, promptly respectively simultaneously from the both direction transport service.
Service channel P1, P2, P3 that foundation has the identical sources destination node are the protection group, and the priority of service channel P1, P2, P3 is: PP1＞PP2＞PP3.When destination node N2 detects the passage P1 fault of high priority; according to priority rule; the normal condition passage P3 that chooses current lowest priority in the protection group is as the protection passage; collect the business of former passage P1 with receiving professional channel switching to P3, and will protect the priority of passage P3 to be adjusted into the priority of protected passage P1.Send the bridge joint solicited message to source node N1 simultaneously,, and send bridged appearances information such as RDI or K byte.Embodiment of the invention scheme preferentially; when selecting the lowest priority passage; if it is lowest priorities that a plurality of passages are arranged in the protection group, then can be in addition according to the numbering of each passage in the protection group, select maximum one of numbering in these equal priority passages to be the protection passage.
Receive the bridge joint solicited message of destination node N2 as source node N1 after; according to the bridged appearances information of receiving the business of protected passage P1 is bridged on the corresponding low priority protection passage P3, and will protects the priority of passage P3 to be adjusted into the priority of protected passage P1.So far, passage P3 finishes the protection to passage P1, and the business among the P1 is recovered.
After the fault recovery, destination node N2 cancellation sends the bridge joint request, enters WTR (Wait-to-Restore, Wait-to-Restore) and waits for.After source node N1 detects bridge joint request cancellation, enter WTR equally and wait for.After WTR finished, destination node N2 switched back passage P3 and collects protected business.The protected business of source node N1 cancellation bridge joint is recovered the low priority traffice of being seized.To protect the priority of passage to revert to the priority of being seized low priority traffice simultaneously.
The path protection system of the service transport network in the embodiment of the invention two is, dynamic adjusting module, be used for dynamically adjusting the bandwidth of each service channel in the protection group of plural at least service channel P1 with identical sources destination node, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, bandwidth with the service channel of bandwidth maximum in the protection group is a benchmark, and the bandwidth of the service channel Pn of adjustment lowest priority is more than or equal to the bandwidth of the service channel of other priority; The priority of service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn.
Destination node when being used to detect other service channel except that Pn first fault taking place, is switched service channel Pn into lowest priority with receiving professional passage by the service channel of first fault, and is sent the first bridge joint request and the first bridged appearances information.
Source node, be used for according to the first bridge joint request and the first bridged appearances information that receive, business on the service channel of first fault is bridged on the service channel Pn of lowest priority, and the priority of the service channel Pn of lowest priority is adjusted into the priority of the service channel of first fault.
Source node also is used for the service channel Pn of the switching services on the service channel of first fault to lowest priority.
The path protection system of the service transport network in the embodiment of the invention two can also be specially, as schematic diagram as shown in Figure 3.
The formwork erection piece is set up in protection; being used to set up plural at least service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn with identical sources destination node is the protection group, and the priority of service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn.
Dynamic adjusting module; be used for dynamically adjusting the bandwidth of the interior plural at least service channel P1 of protection group, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn; bandwidth with the service channel of bandwidth maximum in the protection group is a benchmark, and the bandwidth of the service channel Pn of adjustment lowest priority is more than or equal to the bandwidth of the service channel of other priority.
Above-mentioned dynamic adjusting module, be DBA (Dynamic Bandwidth Assignment towards the whole network, Dynamic Bandwidth Allocation) module, its adjustment process is: the bandwidth request information that receives inner each service port of this node that each node (source node, destination node) detects, adds up and report, according to information such as existing bandwidth resources, each node traffic type, priority on each node passage, judge and calculate, at last the bandwidth allocation information of each node is issued to each node.Each node transmits data according to the bandwidth of distributing.The bandwidth allocation information that in the embodiment of the invention each node is issued mainly is bandwidth map (BWmap), according to bandwidth map, each node assembling T-CONT frame (Transmission Container, transmit container) size and quantity, form plural at least service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn and come transport service.
Destination node, when being used to detect other service channel except that Pn first fault taking place, destination node will receive professional passage and switch service channel Pn into lowest priority by the service channel of first fault, and send the first bridge joint request and the first bridged appearances information.
Source node, be used for according to the first bridge joint request and the first bridged appearances information that receive, business on the service channel of first fault is bridged on the service channel Pn of lowest priority, and the priority of the service channel Pn of lowest priority is adjusted into the priority of the service channel of first fault.
Destination node also is used for the service channel Pn of the switching services on the service channel of first fault to lowest priority.
The embodiment of the invention can further include,
Destination node comprises, fault detection module, and whether other service channel that is used to detect except that Pn first fault takes place; Switch module, switch service channel Pn by the service channel of first fault into lowest priority with receiving professional passage; Information sending module is used to send the first bridge joint request and the first bridged appearances information.
Source node comprises, bridge module is used for the business on the service channel of first fault being bridged on the service channel Pn of lowest priority according to the first bridge joint request and the first bridged appearances information that receive; The priority adjusting module is used for the priority of the service channel Pn of lowest priority is adjusted into the priority of the service channel of first fault.
The embodiment of the invention can further include, dynamic adjusting module, also be used for, the bandwidth of service channel Pn-1 of dynamically adjusting the inferior lowest priority of service channel is, more than or equal to the bandwidth of other service channel except that the service channel Pn of lowest priority; Fault detection module also is used for, and second fault takes place the service channel Pn that detects lowest priority; Switch module, also be used for, switch service channel Pn-1 into inferior lowest priority with receiving the service channel Pn of professional passage by lowest priority; Information sending module also is used for, and sends the second bridge joint request and the second bridged appearances information; Bridge module also is used for according to the second bridge joint request and the second bridged appearances information that receive, the business on the service channel Pn of lowest priority is bridged on the service channel Pn-1 of time lowest priority; The priority adjusting module also is used for the priority P Pn-1 of the service channel of inferior lowest priority is adjusted into the priority of the service channel of first fault.
The embodiment of the invention can further include, dynamic adjusting module, also be used for, bandwidth W1, the W2 of dynamic adjustment service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn ... Wn, with W1 is benchmark, adjustment W1, W2 ... Wn is: W1≤W2≤...≤Wn.
By the description of the invention described above embodiment as can be known; the channel protection group that has the identical sources destination node by foundation; dynamically adjust the bandwidth of each service channel in the protection group; when service channel breaks down; with the business on the service channel that breaks down; switch the minimum passage of other service channel medium priority to the protection group; solved the problem that effectively to protect for the transmission network of dynamic bandwidth adjustment in the prior art; improve the reliability of transmission network performance, improved the bandwidth resources utilance simultaneously.
Contents such as concrete signal processing, implementation between the module of said system and since with the inventive method embodiment based on same conception, can repeat no more referring to the narration in the embodiment of the invention one herein.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement, but the former is better execution mode under a lot of situation by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out some part method of each embodiment of the present invention or embodiment.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (13)
1, a kind of channel protection method of service transport network is characterized in that, comprising:
Dynamically adjust the bandwidth of each service channel in the protection group of plural at least service channel P1 with identical sources destination node, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, bandwidth with the service channel of bandwidth maximum in the described protection group is a benchmark, and the bandwidth of the service channel Pn of adjustment lowest priority is more than or equal to the bandwidth of the service channel of other priority; The priority of described service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn;
When destination node detects other service channel except that Pn first fault takes place, destination node will receive professional passage and switch service channel Pn into lowest priority by the service channel of described first fault, and send the first bridge joint request and the first bridged appearances information to source node;
Source node is according to the described first bridge joint request and the described first bridged appearances information that receive, business on the service channel of described first fault is bridged on the service channel Pn of described lowest priority, and the priority of the service channel Pn of described lowest priority is adjusted into the priority of the service channel of described first fault;
Described destination node with the switching services on the service channel of described first fault to the service channel Pn of described lowest priority.
2, method according to claim 1; it is characterized in that; before described dynamic adjustment step, comprise that further setting up plural at least service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn with identical sources destination node is the protection group.
3, method according to claim 1, it is characterized in that, after destination node detects described first fault recovery, destination node stops to send described first bridge joint request and the described first bridged appearances information, after the time of setting arrives, destination node is switched back the passage pickup services of described first fault recovery, source node stops the business on the service channel of described first fault of bridge joint, business on the service channel Pn of the described lowest priority that recovery is seized, and the priority of the service channel of described lowest priority is adjusted into described lowest priority PPn before the bridge joint.
4, method according to claim 1 is characterized in that, further comprise,
Dynamically the bandwidth of the service channel Pn-1 of the inferior lowest priority of the described service channel of adjustment is, more than or equal to the bandwidth of other service channel except that the service channel Pn of lowest priority;
When second fault takes place in the service channel Pn that detects described lowest priority when destination node, destination node will receive professional passage and switch service channel Pn-1 into described lowest priority by the service channel Pn of described lowest priority, and send the second bridge joint request and the second bridged appearances information to source node;
Source node is according to the described second bridge joint request and the described second bridged appearances information that receive, business on the service channel Pn of described lowest priority is bridged on the service channel Pn-1 of described lowest priority, and the priority P Pn-1 of the service channel of described lowest priority is adjusted into the priority of the service channel of described first fault.
5, method according to claim 1, it is characterized in that, the step of described dynamic adjustment is specially, bandwidth W1, the W2 of the described service channel P1 of dynamic adjustment, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn ... Wn, with W1 is benchmark, adjustment W1, W2 ... Wn is: W1≤W2≤...≤Wn.
6, method according to claim 5, it is characterized in that, further comprise, after the bandwidth adjustment request information of any one passage Pm in receiving described service aisle P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, according to described bandwidth adjustment request information, calculate new bandwidth Wm, judge whether bandwidth Wm+1, the Wm-1 of adjacency channel Pm+1, the Pm-1 of Wm and request channel Pm satisfies: Wm+1 〉=Wm 〉=Wm-1; If satisfy, then distribute bandwidth Wm to Pm.
7, method according to claim 5 is characterized in that, if do not satisfy Wm+1 〉=Wm 〉=Wm-1, Wm does not then adjust the bandwidth of Pm less than Wm-1; If Wm greater than Wm+1, then adjusts Wm+1, make Wm+1 〉=Wm.
8, a kind of path protection system of service transport network is characterized in that,
Dynamic adjusting module, be used for dynamically adjusting the bandwidth of each service channel in the protection group of plural at least service channel P1 with identical sources destination node, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn, bandwidth with the service channel of bandwidth maximum in the described protection group is a benchmark, and the bandwidth of the service channel Pn of adjustment lowest priority is more than or equal to the bandwidth of the service channel of other priority; The priority of described service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn is: PP1＞PP2＞...＞PPn-1＞PPn;
Destination node, when being used to detect other service channel except that Pn first fault taking place, switch service channel Pn with receiving professional passage by the service channel of described first fault, and send the first bridge joint request and the first bridged appearances information into lowest priority;
Source node, be used for according to the described first bridge joint request and the described first bridged appearances information that receive, business on the service channel of described first fault is bridged on the service channel Pn of described lowest priority, and the priority of the service channel Pn of described lowest priority is adjusted into the priority of the service channel of described first fault;
Described destination node also is used for the service channel Pn of the switching services on the service channel of described first fault to described lowest priority.
9, the path protection system of service transport network according to claim 8; it is characterized in that; also comprise; the formwork erection piece is set up in protection, and being used to set up plural at least service channel P1, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn with identical sources destination node is the protection group.
10, the path protection system of service transport network according to claim 8 is characterized in that, described destination node comprises,
Fault detection module, whether other service channel that is used to detect except that Pn first fault takes place;
Switch module, switch service channel Pn by the service channel of described first fault into lowest priority with receiving professional passage;
Information sending module is used to send the first bridge joint request and the first bridged appearances information.
11, the path protection system of service transport network according to claim 8 is characterized in that, described source node comprises,
Bridge module is used for the business on the service channel of described first fault being bridged on the service channel Pn of described lowest priority according to the described first bridge joint request and the described first bridged appearances information that receive;
The priority adjusting module is used for the priority of the service channel Pn of described lowest priority is adjusted into the priority of the service channel of described first fault.
12, the path protection system of service transport network according to claim 10, it is characterized in that, described dynamic adjusting module, also be used for, dynamically the bandwidth of the service channel Pn-1 of the inferior lowest priority of the described service channel of adjustment is, more than or equal to the bandwidth of other service channel except that the service channel Pn of lowest priority;
Described fault detection module also is used for, and whether the service channel Pn that detects described lowest priority second fault takes place;
The described module of switching also is used for, and when described fault detection module detects described second fault, switches service channel Pn-1 into described lowest priority with receiving the service channel Pn of professional passage by described lowest priority;
Described information sending module also is used for, and sends the second bridge joint request and the second bridged appearances information;
Described bridge module also is used for the business on the service channel Pn of described lowest priority being bridged on the service channel Pn-1 of described lowest priority according to the described second bridge joint request and the described second bridged appearances information that receive;
Described priority adjusting module also is used for the priority P Pn-1 of the service channel of described lowest priority is adjusted into the priority of the service channel of described first fault.
13, the path protection system of service transport network according to claim 8; it is characterized in that; described dynamic adjusting module; specifically be used for; bandwidth W1, the W2 of the described service channel P1 of dynamic adjustment, P2, P3......Pm-1, Pm, Pm+1.....Pn-1, Pn ... Wn; with W1 is benchmark, adjustment W1, W2 ... Wn is: W1≤W2≤...≤Wn.
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| CN200810189656A CN101686094A (en) | 2008-09-27 | 2008-09-27 | Path protection method and system of service transport network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136997A (en) * | 2010-08-16 | 2011-07-27 | 华为技术有限公司 | Path state updating method and node |
| CN113453097A (en) * | 2021-06-23 | 2021-09-28 | 烽火通信科技股份有限公司 | Service recovery method, device, equipment and readable storage medium |
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2008
- 2008-09-27 CN CN200810189656A patent/CN101686094A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136997A (en) * | 2010-08-16 | 2011-07-27 | 华为技术有限公司 | Path state updating method and node |
| CN102136997B (en) * | 2010-08-16 | 2014-12-24 | 华为技术有限公司 | Path state updating method and node |
| CN113453097A (en) * | 2021-06-23 | 2021-09-28 | 烽火通信科技股份有限公司 | Service recovery method, device, equipment and readable storage medium |
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