CN1812299B - Multiplying segment suppressing method - Google Patents
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Abstract
This invention discloses a kind of multiplex segment pressing method. It concludes: A. the node receiving the multiplex segment pressing initiated information will judge whether the said corresponding relation occurs in itself. If it does, a corresponding relation will be acquired and step B will be carried out. Or, the pressing process of this node will stop; B. according to the service level inthe corresponding relation, the current node judges whether the corresponding service is high-level service. If it is, management unit alarming indication signal will be inserted into the sink of thecurrent corresponding relation. Or, branch unit alarming indication signal will be inserted into the sink of the current corresponding relation; C. whether all the self-stored corresponding relationsare completely read over is judged. If they are, the pressing process of this node will stop. Or, it turns to the next corresponding relation and returns to step B.
Description
Technical field
The present invention relates to SDH (Synchronous Digital Hierarchy) (SDH:Synchronous DigitalHierarchy) technology in the optical communication field, relate in particular to the service protection technology among the SDH.
Background technology
Service protection in the SDH transmission network is meant the prearranged capacity of transmission node that utilizes, and removes to protect the main capacity of using with certain reserve capacity, thereby improves the method for SDH internet security and reliability.Present modal SDH service protection mode is a MSP-ring.The implication of MSP-ring is; when certain section optical fiber in the multiplex section ring breaks down; carry out APS (APS:Automatic Protection Switching); make originally to transfer on the protection route and transmit, thereby the continuation that guarantees this business transmits at the service signal that transmits on the impaired optical fiber.
Two-direction duplexing section rotating loop as shown in Figure 1 is an example; in the multiplex section ring that constitutes by A, B, four nodes of C, D; fibre circuit between adjacent two nodes is called as a section; each section all includes service aisle and protection passage; and for a business, service aisle is opposite with the transmission direction of protection passage.Under the normal condition of not switching, service aisle is responsible for transport service, and the protection passage is idle generally speaking.At loop just often, if between node A and Node B, transmit two-way services 1, this business can be considered with node A be source node, be the one way traffic of destination node with the Node B and be source node with the Node B, be the summation of the one way traffic of destination node with node A.Business with A → B is an example; when the optical fiber between node A and the Node B breaks down; node A and Node B are carried out APS and are switched, and automatically the business of fault anteposition in service aisle are switched on the protection passage, and finish the transmission of this business through path A → D → C → B.
As shown in Figure 2, in the multiplex section ring of Fig. 1, except transport service 1, also there is a business 2 of between Node B and node C, transmitting.It is source node that this business can be considered to be equally with the Node B, be the one way traffic of destination node and be source node, be the summation of the one way traffic of destination node with the Node B with node C with node C.For the one way traffic of B → C, when fault-free took place, this business 2 was by being transmitted to the operating path of C by B; The one way traffic of C → B under normal circumstances then is by finishing transmission by C to the service aisle of B.With one way traffic A → B and B → C is example; under the situation of both coexistences; if two sections optical fiber between node A, B and Node B, the C break down simultaneously; node A, B, C carry out APS simultaneously and switch at this moment; and Node B is owing to the optical fiber that the both direction from the multiplex section ring arrives other node all exists fault to become failure node; then professional A → B becomes the protection passage that utilizes A → D → C after switching transmits; and for professional B → C, its destination node C switches the back from node D pickup services information by switching preceding becoming from Node B pickup services information.Because being the service aisle of other section, shares in the protection passage of each section, and if the identical time slot of above-mentioned two professional uses, then node C can collect the business information that comes from node A from node D after switching, and professional wrong the company promptly taken place.
In order to solve the professional wrong problem that connects, G.841, ITU-T has stipulated the method that a kind of multiplex section is suppressed in (Interbational TelecommunicationsUnion G.841) suggestion, promptly when carrying out multiplex section rearrangement, slotting Administration unit alarm indication signal (AU-AIS:Administrate Unit-Alarm Indication Signal) under in may causing the wrong service channel that connects, so that shield the business transmission in this service channel, thereby avoid professional mistake to connect.
The method of the multiplex section compacting in the ITU-T suggestion is being provided with service allocation list simultaneously for the multiplex section ring, also on the source node of every business or pass-through nodes, pressing table is set, specifically please refer to Fig. 3, the service allocation list of multiplex section ring comprises parts such as administrative unit (AU:Administrate Unit) number, node and corresponding business information among Fig. 1.Wherein symbol VC (Virtual Container, virtual container) represents to comprise low-order service in this business.Corresponding to the service allocation list of this multiplex section ring, all there is the pressing table that includes many compacting rules in the A on this ring, B, four nodes of C, D.Not only comprise the source node and the destination node information of every business in the pressing table, but also contained low-order service sign VC.
When carrying out the compacting of multiplex section ring, suppress according to the pressing table that the service allocation list and the ring of this multiplex section ring are gone up each node.Particularly, when the source node of certain bar business lost efficacy, insert the AU-AIS alarm down to the service aisle of former traffic direction; When the destination node of certain bar business lost efficacy, insert the AU-AIS alarm down to the opposite direction protection passage of former traffic direction.
As shown in Figure 4, existing multiplex section ring drawing method may further comprise the steps:
Step 401. triggers the compacting of multiplex section ring.
In this step, the multiplex section ring triggers multiplex section ring compacting under following three kinds of situations: present node is received that switching request, present node that other node sends detect and is broken down on the connected section or fault is eliminated and present node receives the order of switching that the user issues.Wherein, no matter be the switching request of other node or user issue switch order, wherein all can carry and show that request switches, asks to cancel the field of switching or asking certain node locking is not participated in purposes such as switching.
With the multiplex section ring among Fig. 2 is example, if the optical fiber of AB, BC section breaks down simultaneously, Node B lost efficacy, and node A, B, C APS take place simultaneously switch, then node A is known between the AB by the detection of self and is broken down, and the switching request that sends by node C is known between the BC and broken down again.
Step 402～404. judge whether this node is whether to have failure node on switching node and the multiplex section ring, if, judge then whether this node exists pressing table, if exist, then obtain first compacting rule in the pressing table, if there is not pressing table in this node, then finish the compacting flow process of this node; Otherwise, promptly if there is no, finish the compacting flow process of this node.
For node A, himself be switching node, and have failure node B on this multiplex section ring, then, because there is pressing table in node A place, then obtain article one compacting rule in the pressing table, so that carry out follow-up operation according to this compacting rule.
Step 405. judges whether the source node in the current compacting rule lost efficacy, if then execution in step 406; Otherwise execution in step 408.
For first compacting rule of pressing table among the node A, source node that this is professional and destination node are respectively node A and Node B, and its source node did not lose efficacy, so execution in step 408.
Step 406～407. judge whether the forward service aisle of the regular respective segments of current compacting has inserted the AU-AIS alarm down, if then execution in step 410; Otherwise, in the forward service aisle of the regular respective segments of current compacting, insert the AU-AIS alarm down, and enter step 410.
So-called forward service aisle is meant the service aisle in this section, and the reverse protection passage is meant the protection passage of the next section of this section on its protection channel transfer direction.For section AB, the forward service aisle is meant the service aisle of AB section; The reverse protection passage is meant the protection passage of AD section.
Step 408～409. judge whether the forward service aisle of the regular respective segments of current compacting has inserted the AU-AIS alarm down, if, then cancel the AU-AIS alarm in the forward service aisle of the regular respective segments of current compacting, and execution in step 410; Otherwise, execution in step 410.
Under the situation that source node in current compacting rule did not lose efficacy, if inserted the AU-AIS alarm in the forward service aisle down, then with its cancellation.
Step 410. judges whether the destination node in the current compacting rule lost efficacy, if then execution in step 411; Otherwise, execution in step 413.
Step 411～412. judge in the reverse protection passage of the regular respective segments of current compacting whether inserted the AU-AIS alarm down, if then execution in step 415; Otherwise, in the corresponding reverse protection passage of current rule, insert the AU-AIS alarm down, and execution in step 415.
Under the situation that destination node lost efficacy, need suppress its reverse protection passage, promptly alarm and avoid professional wrong the company by inserting AU-AIS down.
Step 413～414. judge in the reverse protection passage of the regular respective segments of current compacting whether inserted the AU-AIS alarm down; if, then cancel the AU-AIS alarm in the reverse protection passage of the regular respective segments of current compacting, and execution in step 415; otherwise, execution in step 415.
Under destination node lost efficacy situation about not losing efficacy, need not the reverse protection passage is suppressed, if in the reverse protection passage, inserted the AU-AIS alarm down this moment, then with its cancellation.
For node A among Fig. 3, its first source node A that suppresses in the rule do not lose efficacy, therefore judge and whether have the AU-AIS alarm in the AB section forward service aisle, and under the situation that does not have this alarm, in the forward service aisle of AB section, insert the AU-AIS alarm signal down and carry out the multiplex section compacting.
Step 415～416. judge that whether current compacting rule is the tail record in its place pressing table, if then turn to next bar compacting rule, and return execution in step 405; Otherwise, finish the compacting flow process of this node.
Owing to might comprise some compacting rules in the pressing table of present node, therefore judge the record that after current compacting rule, whether has other in this step, so that according to the failure condition of reality, to this node being all professional multiplex section compacting flow processs of carrying out of source node or pass-through nodes.
For the node A among Fig. 3, wherein co-exist in six compacting rules, therefore the flow process of step 405 to step 416 can be repeated six times.
It more than is multiplex section pressing process at a node.For the multiplex section ring of forming by four nodes among Fig. 3, all can carry out above-mentioned flow process in A, B, four nodes of C, D.At AB, when the BC section breaks down simultaneously, the protection passage of section AD and section DC can descend to insert AU-AIS and alarm and realize multiplex section compacting.
Utilize above-mentioned multiplying segment suppressing method can prevent professional wrong company that occurs in the multiplex section ring switching process, but still there is following shortcoming in this method:
Since the AU-AIS alarm signal at be the high-order business, Tributary unit alarm indication signal (TU-AIS) is only the effective alarm signal of low-order service, alarm and in existing multiplying segment suppressing method, just insert AU-AIS down, the mistake that then can only effectively prevent the high-order business connects, and does not support low-order service.But have a large amount of low-order services in actual applications, therefore existing multiplying segment suppressing method does not support that low-order service is a more serious defective.
2. in the pressing table of existing multiplying segment suppressing method, every compacting rule only comprises the information of a source node, then as long as this source node suppressing regular corresponding service loses efficacy just suppresses; And for the high-order business under the single node down and on the multinode of multinode on the multinode, only when all losing efficacy, just suppressed whole source nodes, therefore the information of multiple source node can't be obtained in the existing multiplying segment suppressing method by pressing table, and then compacting can't be under the situation that source node all lost efficacy, just carried out.
3. in the existing multiplying segment suppressing method, the AU-AIS alarm is by inserting under the source node of business or the pass-through nodes, then switch the downstream node of the professional process in back and all can receive and show this alarm, too much warning information is made troubles to maintenance, being difficult to distinguish this AU-AIS alarm is because compacting produces, and is still produced by other reason.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of multiplying segment suppressing method, can either prevent that the mistake of high-order business from connecting, can prevent that again the mistake of low-order service from connecting.
For achieving the above object, the invention provides a kind of multiplying segment suppressing method, preserve the pressing table between this business-level and the place information in the destination node of every business moving on the multiplex section ring, described method specifically may further comprise the steps:
A. receive the destination node of multiplex section compacting trigger message judges whether have described pressing table in self, if, then from the pressing table of self, obtain first compacting rule, execution in step B then, otherwise, the flow process that this node multiplex section is suppressed finished;
B, judge that whether all source nodes in the current compacting rule all lost efficacy, if, execution in step C then; Otherwise, enter step D;
C. current destination node judges according to the business-level in the compacting rule of being obtained in the steps A whether this compacting rule corresponding service is the high-order business, if, slotting Administration unit alarm indication signal under then in the corresponding destination node of current compacting rule, execution in step D then, otherwise, show that this compacting rule corresponding service is a low-order service, and in the corresponding destination node of current compacting rule slotting Tributary unit alarm indication signal, execution in step D then down;
D. present node judges whether to run through whole compacting rules of preserving in self, if, then finish the flow process that this node multiplex section is suppressed, otherwise, turn to next bar compacting rule, return execution in step B.
The information that the described multiplex section compacting of steps A triggers also comprises: current destination node receives that carrying of other node transmission asked to switch field or asked cancellation to switch the switching request of field on the multiplex section ring;
Perhaps current destination node detects and breaks down on himself place section or information that fault is eliminated;
Perhaps current destination node receives that the request of carrying that the user sends switches the order of switching that field is switched in field or cancellation.
Described step C takes a step forward and comprises:
Judge current business suppresses whether inserted alarm in the regular pairing destination node down, if, execution in step D then; Otherwise, execution in step C.
Steps A receives the destination node of multiplex section compacting trigger message judges whether there is described pressing table in self,, further comprise if afterwards:
A1. judge whether to switch according to multiplex section compacting trigger message, if, execution in step A2 then; Otherwise, judge whether to have cancelled and switch, if, execution in step A2 then, otherwise, the flow process of this node multiplex section compacting then finished;
A2. current destination node is according to the multiplex section ring more new node isolation information of information and loopful node configuration table that is triggered, and obtains first the compacting rule of self;
A3. judge according to the destination node isolation information whether all source nodes in the current business compacting rule all lost efficacy, if, execution in step A4 then, otherwise, judge current business suppresses in the regular pairing destination node whether inserted alarm down, if inserted down, the alarm cancellation that then will insert down, if do not insert down, execution in step A4 then;
A4. judge whether to run through whole compacting rules, if then finish the flow process that this node multiplex section is suppressed; Otherwise, turn to the professional compacting rule of next bar, return execution in step A3 then.
The information that is triggered when described multiplex section ring is that current destination node receives that other node sends on the multiplex section ring the request of carrying switches field or request cancellation when switching the switching request of field, judge whether described in the steps A 1 that the method for having carried out switching is specially: judge that institute receives whether what carry in the switching request is to ask to switch field, if, then judge and switch, otherwise, judge and do not switch;
Steps A 1 is described have been judged whether to cancel the method for switching and has been specially: judge institute receives whether what carry in the switching request is that field is switched in the request cancellation, if, then judge to have cancelled and switch, otherwise, judge not cancel and does not switch.
When the described multiplex section ring information of being triggered is that current destination node detects and breaks down on himself place section or fault when eliminating, the steps A 1 described method of having carried out switching that judges whether is specially: fault occurred if current destination node detects self place section, then think and switch, otherwise, think and do not switch;
Steps A 1 is described have been judged whether to cancel the method for switching and has been specially: be eliminated if current destination node detects the fault of self place section, then think to have cancelled and switch, otherwise, think that cancellation is not switched.
When the described multiplex section ring information of being triggered is that current destination node receives that the request of carrying that the user sends switches the order of switching that field is switched in field or cancellation, the steps A 1 described method of having carried out switching that judges whether is specially: if receive that switching what carry in the order is that field is switched in request, then think and switch, otherwise, think and do not switch;
Steps A 1 is described have been judged whether to cancel the method for switching and has been specially: if receive that switching what carry in the order is that field is switched in the request cancellation, then think to have cancelled and switch, otherwise, think that cancellation is not switched.
The place information of described business comprises: place plate number, place port numbers, place higher order path number and place low order channel number.
Use the present invention, when carrying out the compacting of multiplex section ring, both supported the high-order business, by supporting low-order service.Particularly, the present invention has following beneficial effect:
1. multiplex section ring drawing method of the present invention, corresponding relation between business by setting up different stage and the different places, and determine that according to business-level current business belongs to high-order business or low-order service by the destination node of business, and at inserting the AU-AIS alarm under the high-order business, insert the TU-AIS alarm down at low-order service, prevented that effectively high-order mistake professional and low-order service from connecting;
2. in the multiplying segment suppressing method of the present invention, comprise all source node information of every business in the pressing table, and determined should business all source nodes situation about all losing efficacy under, just carry out the compacting of multiplex section ring;
3. in the multiplying segment suppressing method of the present invention, it is slotting down that AU-AIS alarm or TU-AIS alarm are that the destination node by business encircle the place that the back arrived under this business, therefore, the multiplex section ring is more or less freely distinguishes the reason of the alarm of descending to insert, and makes things convenient for warning information to safeguard;
4. in the multiplying segment suppressing method of the present invention,, save the storage resources of multiplex section ring only at the destination node place of business record pressing table.
Description of drawings
Fig. 1 is a multiplex section protection ring switching schematic diagram;
Fig. 2 is the professional wrong schematic diagram that connects of multiplex section protective ring;
Fig. 3 is existing service allocation list and node pressing table schematic diagram;
Fig. 4 is existing multiplying segment suppressing method flow chart;
Fig. 5 is the professional schematic diagram of multiplex section ring in the embodiment of the invention 1;
Fig. 6 is a multiplying segment suppressing method flow chart of the present invention.
Embodiment
For making purpose of the present invention, technical scheme clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
The present invention is a kind of multiplying segment suppressing method, its basic thought is: the loopful node configuration table that shows each node distribution sequence in the multiplex section ring is set, the pressing table that comprises the grade of service, whole source node information and professional place information etc. is set in the destination node of every business simultaneously, when occurring needing the situation of compacting, according to pressing table, decision is the type and the position of slotting alarm signal down by the destination node of business.
For a multiplex section ring that comprises n node, loopful node configuration table is according to each node distribution situation in this ring, a said n node sequence is inserted node 1 to the pairing project of node n hurdle, and node 1 pairing node links to each other directly with the pairing node of node n.Above-mentioned loopful node configuration table can set in advance before method of the present invention begins, and also can use this also to be provided with before the step of node configuration table entirely in the present invention.
For the pressing table in the destination node, the compacting rule of every expression service attribute corresponding relation includes business-level, source node number, place plate number, place port numbers, place higher order path number and place low order channel number.Wherein the implication of each project is as follows:
1. business-level: use VC12, VC3 and VC4 to represent concrete business-level among the present invention, wherein VC12 and VC3 are low-order service, and VC4 is the high-order business.Owing to also have the professional and AU3 business of VC4 cascade in the practical application, then in the present invention VC4 cascade business be considered as many VC4 business and handle, and represent the grade of service of AU3 business with VC4.
2. source node number: show the node number that encircles on this business.Because multiplex section ring is supported 16 nodes at most, so effective value of source node number is 0～15.In addition, the business on the multiplex section ring may have only a source node, also has the multiple source node, then when the multiple source node is arranged, in the pressing table whole source nodes is all showed.
3. place plate number: the place plate is meant professional destination node from the multiplex section ring the circuit veneer or the branch road veneer that are arrived of ring back down, and the place plate number just is meant the numbering of above-mentioned circuit veneer or branch road veneer.The circuit veneer is supported the two-forty rank such as 155M, 622M, 2.5G and 10G, can either carry the high-order business, can carry low-order service again; The branch road veneer then support such as 1.5M, 2M, 34M and 45M the speed rank, therefore can only carry low-order service.
4. place port numbers: show professional destination node from the multiplex section ring arrive the place plate the port of process.
5. higher order path number: show professional destination node from the multiplex section ring arrive the place plate the higher order path of process.The higher order path of wiring board number is the positive integer of non-zero, and the higher order path of tributary card number then is always zero.
6. low order channel number: show professional destination node from the multiplex section ring arrive the place plate the low order time slot of process.For the place plate is the low-order service of wiring board, and its low order channel number is the positive integer of non-zero, and is the low-order service of tributary card for high-order business or place plate, and its low order channel number then is always zero.
Usually the position of arrival is called the place of this business after business being encircled down from the destination node on the multiplex section ring, form professional place information and above-mentioned place plate number, place port numbers, higher order path number and low order channel are number common, i.e. form by place plate number-place port numbers-higher order path number-low order channel number, the concrete condition of the place that expression is professional, wherein insignificant parameter is represented with 0.Particularly, because the place plate of high-order business can only be a wiring board, its low order channel is skimble-skamble, so the place of high-order business is expressed as place plate number-place port numbers-higher order path number-0, and alarm and realize multiplex section compacting by inserting AU-AIS down this moment; For being the low-order service of place plate with the wiring board, its place is expressed as place plate number-place port numbers-higher order path number-low order channel number, and what this inserted at present is the TU-AIS alarm; And for being the low-order service of place with the tributary card, because its place port is actual low order channel, therefore just can represents the specifying information of its place, and insert TU-AIS at present in the needs compacting and alarm with the place plate number-form of place port numbers.
Below, be example with 8 node multiplex section rings and 4 node multiplex section rings, describe multiplex section ring drawing method of the present invention in detail.
The drawing method of embodiment 1:8 node multiplex section ring.
Comprise 8 nodes in the multiplex section ring as shown in Figure 5 altogether, be respectively: NE1, NE2, NE3, NE4, NE5, NE6, NE7 and NE8; And have three kinds of typical multiplex section ring business on this multiplex section ring: a kind of is the business of 1 place, 1 source, arrives first VC4 passage of No. 1 port on the plate of Line 1 road after it encircles down from source node NE5 ring, by destination node NE4, and its business-level is VC4; A kind of is the business of 2 places, 1 source, be other broadcasting service of VC12 level, it is from source node NE1 ring, by destination node NE2 and NE3 down behind the ring, arrives first VC12 passage in first VC4 passage of No. 1 port on first port of No. 1 tributary card and the Line 1 road plate respectively; Another kind is the business of 1 place, 2 sources, and this business is encircled, encircled down by destination node NE8 from source node NE6 and NE7, arrives first port of No. 1 tributary card, and its business-level is VC3.According to actual conditions professional in this multiplex section ring, the present invention is provided with pressing table at the destination node place of each bar business, and is specific as follows:
For the business of 2 places, above-mentioned 1 source, there is pressing table as shown in Table 1 and Table 2 on its destination node NE2 and the NE3 respectively.By the table in as seen, the source node of this VC12 low-order service is NE1, its place information is respectively 1-1-0-0 and 1-1-1-1.
| Business-level | Source node 1 | Source node 2 | Place plate number | The place port numbers | Place higher order path number | Place low order channel number |
| VC12 | NE1 | Do not have | 1 | 1 | 0 | 0 |
Table 1
| Business-level | Source node 1 | Source node 2 | Place plate number | The place port numbers | Place higher order path number | Place low order channel number |
[0087]
| VC12 | NE1 | Do not have | 1 | 1 | 1 | 1 |
Table 2
There is pressing table as shown in table 3 in business for 1 place, above-mentioned 1 source on its destination node NE4.By this table as seen, the source node of this VC4 high-order business is NE5, and its place information is 1-1-1-0.
| Business-level | Source node 1 | Source node 2 | Place plate number | The place port numbers | Place higher order path number | Place low order channel number |
| VC4 | NE5 | Do not have | 1 | 1 | 1 | 0 |
Table 3
There is pressing table as shown in table 4 in business for 1 place, above-mentioned 2 sources on its destination node NE8.By this table as seen, the source node of VC3 business is respectively NE6 and NE7, and its place information is 1-1-0-0.
| Business-level | Source node 1 | Source node 2 | Place plate number | The place port numbers | Place higher order path number | Place low order channel number |
| VC3 | NE6 | NE7 | 1 | 1 | 0 | 0 |
Table 4
The above each table when comprising many on the destination node when professional, then exists and every corresponding list item of business in the pressing table just for convenience of description and the example of lifting.
In addition, this multiplex section ring is made up of NE1 to NE8, so its loopful node configuration table comprises content as shown in table 5.
| Node 1 | Node 2 | Node 3 | Node 4 | Node 5 | Node 6 | Node 7 | Node 8 |
| NE1 | NE2 | NE3 | NE4 | NE5 | NE6 | NE7 | NE8 |
Table 5
When the multiplex section ring of present embodiment need be suppressed, each destination node was according to the content of self pressing table and loopful node configuration table, and whether decision need insert alarm under the place of business, and inserted under needs when alarming, and the type of alarm is inserted in decision down.Below, breaking down simultaneously with the section between the section between NE4, the NE5 and NE7, the NE8 is example, describes the method for present embodiment multiplex section compacting in detail.
As shown in Figure 6, the method for present embodiment multiplex section compacting may further comprise the steps:
In this step, the multiplex section ring triggers the compacting of multiplex section ring when following three kinds of situations occurring: present node is received that switching request, present node that other node sends detect and is broken down on the connected section or fault cancellation and present node receive the order of switching that the user issues.Wherein, no matter be the switching request of other node or user issue switch order, wherein all can carry and show that request switches, asks to cancel the field of switching or asking certain node locking is not participated in purposes such as switching.This step is identical with step 40 1.
With the multiplex section ring among Fig. 5 is example; if the optical fiber of section breaks down simultaneously between NE4, the NE5 and between NE7, the NE8; then node NE4, NE5, NE7 and NE8 generation APS switch, and other four nodes on this multiplex section ring carry out break-through at the protection passage to business.For node NE4, it detects in real time between NE3, the NE4 and section operate as normal whether between NE4, the NE5, and when breaking down between NE7, NE8, node NE4 also can receive the switching request that node NE8 process node NE1, NE2 and NE3 send over.
Because present embodiment only is provided with pressing table in the destination node of business, so then there is not pressing table in the node that uses as the source node and the pass-through nodes of business in this multiplex section ring.
Present node receive that the switching request of other nodes or user issue switch order the time, this step is according to this switching request or whether switch what carry in the order be to show that the field that request is switched judges; When present node detected, whether this step was judged for showing to break down according to testing result.
Step 604～605. then obtain first compacting rule in this node pressing table according to loopful node configuration table new node isolation information more.
What is called is the new node isolation information more, be meant the switching request that present node is comprehensively received or switch order and the testing result of self, simultaneously according to the connection situation of each node in the loopful node configuration table, determine the concrete section of current guilty culprit and hinder for some reason and the concrete node that lost efficacy.
With the node NE4 on the multiplex section ring among Fig. 5 is example, this node is known on the section between NE4, the NE5 by the detection of self and fault occurred, while is according to the relative position relation of 8 nodes in switching request that comes from node NE8 and the loopful node configuration table, determine fault to have occurred on the section between NE7, the NE8, and node NE5, NE6 and NE7 were because of being lost efficacy by Fault Isolation.
In addition, because each node all might be used as the destination node of many business, promptly there are many compacting rules in the pressing table on this node.Therefore, present node obtains first compacting rule from the pressing table of self after having upgraded the node isolation information, so that whether decision inserts alarm down, and the type of alarm is inserted in decision down in the subsequent step in this regular pairing place of compacting.
Step 606～607. judge whether all source nodes in the current compacting rule all lost efficacy, if then judge whether inserted alarm in the regular pairing place of current compacting down, if insert down, then execution in step 611, if do not inserted alarm down, then execution in step 608; Otherwise, if not failure, execution in step 611.
In this step, present node is determined the source node of inefficacy according to the node isolation information after upgrading in the step 604.For example: for multiplex section ring shown in Figure 5, node NE4 has determined that in step 604 node NE5, NE6 and NE7 lost efficacy, and the source node of first the corresponding business of compacting rule institute is NE5 in himself pressing table, referring to table 3, so node NE4 determines that in this step the source node in the current compacting rule all lost efficacy.
For a business,, then need not to suppress if the source node of the regular pairing business of current compacting is not whole inefficacies.
Step 608～610. judge whether the regular corresponding service of current compacting is the high-order business, if, then in the corresponding place of current compacting rule, insert the AU-AIS alarm down, execution in step 611 then; Otherwise, in the corresponding group of current compacting rule, insert the TU-AIS alarm down, execution in step 611 then.
In order to make the multiplying segment suppressing method of present embodiment can either be applicable to the high-order business, again can be effective to low-order service, what insert under determining according to the business-level in the current compacting rule is the AU-AIS alarm that is suitable for the high-order business herein, still is suitable for the TU-AIS alarm of low-order service.Particularly, if the business-level in the current compacting rule is VC 12 or VC3, then insert the TU-AIS alarm down; If the business-level in the current compacting rule is VC4, then insert the AU-AIS alarm down.
With the node NE4 on the multiplex section ring among Fig. 5 is example, business-level referring to first compacting rule in the pressing table on this node of table 3 is VC4, belong to the high-order business, and the information of the place of this compacting rule correspondence is: 1-1-1-0, i.e. first VC4 passage of 1 port of No. 1 place plate, therefore node NE4 inserts the AU-AIS alarm signal down to first VC4 passage place of 1 port of No. 1 place plate, so that carry out the multiplex section compacting.
Step 611～612. judge in the current compacting rule whether to be tail record in the pressing table of place, if then finish the compacting flow process of this node; Otherwise, turn to next bar compacting rule, return execution in step 606 then.
Present node receive that the switching request of other nodes or user issue switch order the time, this step is according to this switching request or whether switch what carry in the order be to show that the field that the request cancellation is switched judges; When present node detected, whether this step was judged for showing that fault is got rid of according to testing result.
Step 614～615. present nodes more after the new node isolation information, obtain first rule of this node pressing table according to loopful node configuration table.
The switching request comprehensively received of present node or switch order and the testing result of self herein simultaneously according to the connection situation of each node in the loopful node configuration table, is determined the concrete section of current guilty culprit and is hindered for some reason and the concrete node that lost efficacy.
After having upgraded the node isolation information, present node obtains first compacting rule from the pressing table of self, so that whether decision needs to cancel the alarm of having inserted down in subsequent step.
Step 616～618. judge whether all source nodes in the current compacting rule all lost efficacy, if then execution in step 619; Otherwise, judge in the corresponding place of current compacting rule whether inserted alarm down, if inserted alarm down, then cancel the alarm in the corresponding place of current compacting rule, if slotting down the alarm, then execution in step 619.
It is the operation when cancellation is switched at needs herein.If after new node isolation information more, the corresponding source node of current compacting rule is become effectively by inefficacy because of troubleshooting of faults, then present node is cancelled the alarm of once inserting in the corresponding place of current compacting rule, so that recover the normal transmission of this business; If more after the new node isolation information, the corresponding source node of current compacting rule still all lost efficacy, and then need not to cancel the alarm of once inserting down.
In addition, whether present node exists AU-AIS alarm or TU-AIS alarm signal to judge whether to insert down alarm by detecting in the corresponding place of current compacting rule.
Step 619～620. judge that whether current compacting rule is the tail record in the pressing table of place, if then finish the compacting flow process of this node; Otherwise, turn to next bar compacting rule after, return execution in step 616.
So far, a destination node in the multiplex section ring has been finished the multiplex section pressing process of present embodiment.
The flow process that above-mentioned steps 601 to step 619 is formed is at individual node, and each destination node on the multiplex section ring all will be carried out above-mentioned flow process, to prevent professional wrong company of multiplex section ring.
Be example with the multiplex section ring among Fig. 5 still, the section between the section between NE4, the NE5 and NE7, NE8 breaks down simultaneously, when switching, and all carries out flow process shown in Figure 6 as node NE2, NE3, NE4 and the NE8 of destination node.Execution result is, for node NE2 and NE3, because its professional source node NE1 did not lose efficacy and can not descend to insert alarm; For node NE4, because the inefficacy of the source node NE5 of its VC4 business, and under first VC4 passage place of 1 port of No. 1 place plate, insert the AU-AIS alarm signal; For node NE8, the source node NE6 and the NE7 of its VC3 business all lost efficacy, and then inserted the TU-AIS alarm signal under first port of 1 port of No. 1 place plate.
The above flow process of carrying out the compacting of multiplex section ring according to method of the present invention for 8 node multiplex section rings among the embodiment will be that example is introduced this multiplex section and used method of the present invention to carry out the process of multiplex section ring compacting below with 4 node multiplex section rings shown in Figure 2.
The drawing method of embodiment 2:4 node multiplex section ring.
On multiplex section ring shown in Figure 2, comprise node A, Node B, node C and node D, this ring is gone up and is had one by VC 12 business of node A to Node B, this business is from destination node B down behind the ring, arrives on first VC12 passage of second VC4 passage of first port in No. 2 wiring boards; In addition, this multiplex section ring also comprises one by the VC4 business of Node B to node C, and this business is from destination node down behind the ring, arrives in first VC4 passage of 2 ports on No. 3 wiring boards.The source node of above-mentioned two business is respectively node A and Node B, and destination node is respectively Node B and node C, then according to thought of the present invention, the pressing table shown in table 6 and table 7 is set respectively at Node B and node C place.
| Business-level | Source node 1 | Source node 2 | Place plate number | The place port numbers | Place higher order path number | Place low order channel number |
| VC12 | A | Do not have | 2 | 1 | 2 | 1 |
Table 6
| Business-level | Source node 1 | Source node 2 | Place plate number | The place port numbers | Place higher order path number | Place low order channel number |
| VC4 | B | Do not have | 3 | 2 | 1 | 0 |
Table 7
In addition, according to the relative annexation of node A, B, C, D, the loopful node configuration table of present embodiment 4 node multiplex section rings is as shown in table 8.
| Node 1 | Node 2 | Node 3 | Node 4 |
| A | B | C | D |
Table 8
4 node multiplex section rings of present embodiment are same to use method shown in Figure 6 to carry out the multiplex section compacting.Situation about breaking down simultaneously with section AB and section B C in this multiplex section ring is that example is described in detail below.
At first, when section AB and section B C broke down simultaneously, node A, B, C carried out APS simultaneously and switch, and Node B is found the particular location of fault by the detection of self, node C passes through to detect the fault of finding on the section B C, and has received the switching request that node A sends.In addition, for professional AB,, think that therefore the source node A of professional AB lost efficacy from the both direction of multiplex section ring because its source node A all can't get in touch with its destination node B; Same, for professional BC, because its source node B all can't get in touch with its destination node C from the both direction of multiplex section ring.Therefore think that the source node B of professional BC lost efficacy.
Then, Node B judges whether self exists pressing table.Because being the destination node of professional AB, Node B therefore himself has pressing table; Subsequently, Node B is then only determined only fault to have occurred on section AB and section B C on this multiplex section ring according to loopful node configuration table shown in the table 7 and the testing result of self owing to do not receive any switching request; Simultaneously node C is after determining self to have pressing table, according to self testing result, determine only on section AB and section B C, fault to have occurred on this multiplex section ring from the switching request of node A and the node configuration table that eases up.
Then, Node B is obtained first compacting rule from the pressing table of self, and judges whether all source nodes in this compacting rule all lost efficacy.For first the pairing professional AB of compacting rule, its source node A lost efficacy, therefore Node B judges on first VC12 passage of second VC4 passage of first port in No. 2 wiring boards whether inserted alarm down, and under the situation of not inserting alarm down, in the corresponding place of current compacting rule, insert the TU-AIS alarm down.Owing to have only a transformation rule in the pressing table of Node B, so Node B finishes the compacting flow process of self.Simultaneously, node C inserts the AU-AIS alarm down in first VC4 passage of 2 ports on No. 3 wiring boards after having carried out the compacting flow process identical with Node B, so that avoid professional wrong the company.
So far, finished the compacting when section AB and BC break down simultaneously of 4 node multiplex section rings in the present embodiment.
Use the present invention, when carrying out the compacting of multiplex section ring, both supported the high-order business, by supporting low-order service.Particularly, the present invention has following beneficial effect:
1. multiplex section ring drawing method of the present invention, corresponding relation between business by setting up different stage and the different places, and determine that according to business-level current business belongs to high-order business or low-order service by the destination node of business, and at inserting the AU-AIS alarm under the high-order business, insert the TU-AIS alarm down at low-order service, prevented that effectively high-order mistake professional and low-order service from connecting;
2. in the multiplying segment suppressing method of the present invention, comprise all source node information of every business in the pressing table, and determined should business all source nodes situation about all losing efficacy under, just carry out the compacting of multiplex section ring;
3. in the multiplying segment suppressing method of the present invention, it is slotting down that AU-AIS alarm or TU-AIS alarm are that the destination node by business encircle the place that the back arrived under this business, therefore, the multiplex section ring is more or less freely distinguishes the reason of the alarm of descending to insert, and makes things convenient for warning information to safeguard;
4. in the multiplying segment suppressing method of the present invention,, save the storage resources of multiplex section ring only at the destination node place of business record pressing table.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a multiplying segment suppressing method is characterized in that, preserves the pressing table between this business-level and the place information in the destination node of every business moving on the multiplex section ring, and described method specifically may further comprise the steps:
A. receive the destination node of multiplex section compacting trigger message judges whether have described pressing table in self, if, then from the pressing table of self, obtain first compacting rule, execution in step B then, otherwise, the flow process that this node multiplex section is suppressed finished;
B, judge that whether all source nodes in the current compacting rule all lost efficacy, if, execution in step C then; Otherwise, enter step D;
C. current destination node judges according to the business-level in the compacting rule of being obtained in the steps A whether this compacting rule corresponding service is the high-order business, if, slotting Administration unit alarm indication signal under then in the corresponding destination node of current compacting rule, execution in step D then, otherwise, show that this compacting rule corresponding service is a low-order service, and in the corresponding destination node of current compacting rule slotting Tributary unit alarm indication signal, execution in step D then down;
D. current destination node judges whether to run through whole compacting rules of preserving in self, if, then finish the flow process that this node multiplex section is suppressed, otherwise, turn to next bar compacting rule, return execution in step B.
2. the method for claim 1, it is characterized in that the information that the described multiplex section compacting of steps A triggers also comprises: current destination node receives that carrying of other node transmission asked to switch field or asked cancellation to switch the switching request of field on the multiplex section ring;
Perhaps current destination node detects and breaks down on himself place section or information that fault is eliminated;
Perhaps current destination node receives that the request of carrying that the user sends switches the order of switching that field is switched in field or cancellation.
3. the method for claim 1 is characterized in that, described step C takes a step forward and comprises:
Judge current business suppresses whether inserted alarm in the regular pairing destination node down, if, execution in step D then; Otherwise, execution in step C.
4. the method for claim 1 is characterized in that, steps A receives the destination node of multiplex section compacting trigger message judges whether there is described pressing table in self,, further comprise if afterwards:
A1. judge whether to switch according to multiplex section compacting trigger message, if, execution in step A2 then; Otherwise, judge whether to have cancelled and switch, if, execution in step A2 then, otherwise, the flow process of this node multiplex section compacting then finished;
A2. current destination node is according to the multiplex section ring more new node isolation information of information and loopful node configuration table that is triggered, and obtains first the compacting rule of self;
A3. judge according to the destination node isolation information whether all source nodes in the current business compacting rule all lost efficacy, if, execution in step A4 then, otherwise, judge current business suppresses in the regular pairing destination node whether inserted alarm down, if inserted down, the alarm cancellation that then will insert down, if do not insert down, execution in step A4 then;
A4. judge whether to run through whole compacting rules, if then finish the flow process that this node multiplex section is suppressed; Otherwise, turn to the professional compacting rule of next bar, return execution in step A3 then.
5. method as claimed in claim 4, it is characterized in that, the information that is triggered when described multiplex section ring is that current destination node receives that other node sends on the multiplex section ring the request of carrying switches field or request cancellation when switching the switching request of field, judge whether described in the steps A 1 that the method for having carried out switching is specially: judge that institute receives whether what carry in the switching request is to ask to switch field, if, then judge and switch, otherwise, judge and do not switch;
Steps A 1 is described have been judged whether to cancel the method for switching and has been specially: judge institute receives whether what carry in the switching request is that field is switched in the request cancellation, if, then judge to have cancelled and switch, otherwise, judge not cancel and does not switch.
6. method as claimed in claim 4, it is characterized in that, when the described multiplex section ring information of being triggered is that current destination node detects and breaks down on himself place section or fault when eliminating, the steps A 1 described method of having carried out switching that judges whether is specially: fault occurred if current destination node detects self place section, then think and switch, otherwise, think and do not switch;
Steps A 1 is described have been judged whether to cancel the method for switching and has been specially: be eliminated if current destination node detects the fault of self place section, then think to have cancelled and switch, otherwise, think that cancellation is not switched.
7. method as claimed in claim 4, it is characterized in that, when the described multiplex section ring information of being triggered is that current destination node receives that the request of carrying that the user sends switches the order of switching that field is switched in field or cancellation, the steps A 1 described method of having carried out switching that judges whether is specially: if receive that switching what carry in the order is that field is switched in request, then think and switch, otherwise, think and do not switch;
Steps A 1 is described have been judged whether to cancel the method for switching and has been specially: if receive that switching what carry in the order is that field is switched in the request cancellation, then think to have cancelled and switch, otherwise, think that cancellation is not switched.
8. the method for claim 1 is characterized in that, the place information of described business comprises: place plate number, place port numbers, place higher order path number and place low order channel number.
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| US6657969B1 (en) * | 1999-06-29 | 2003-12-02 | Cisco Technology, Inc. | Generation of synchronous transport signal data used for network protection operation |
| CN1472890A (en) * | 2002-07-30 | 2004-02-04 | 深圳市中兴通讯股份有限公司 | Prevention of fault connection of oplical transfer loop network transmission businesses |
| CN1555163A (en) * | 2003-12-29 | 2004-12-15 | 中兴通讯股份有限公司 | Recovering method for optical transmission circular network wrong connection business |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6657969B1 (en) * | 1999-06-29 | 2003-12-02 | Cisco Technology, Inc. | Generation of synchronous transport signal data used for network protection operation |
| CN1472890A (en) * | 2002-07-30 | 2004-02-04 | 深圳市中兴通讯股份有限公司 | Prevention of fault connection of oplical transfer loop network transmission businesses |
| CN1555163A (en) * | 2003-12-29 | 2004-12-15 | 中兴通讯股份有限公司 | Recovering method for optical transmission circular network wrong connection business |
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