CN101030939B - Method and apparatus for establishing and restoring label exchange path in automatic-exchange optical network - Google Patents
Method and apparatus for establishing and restoring label exchange path in automatic-exchange optical network Download PDFInfo
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- CN101030939B CN101030939B CN2007100648033A CN200710064803A CN101030939B CN 101030939 B CN101030939 B CN 101030939B CN 2007100648033 A CN2007100648033 A CN 2007100648033A CN 200710064803 A CN200710064803 A CN 200710064803A CN 101030939 B CN101030939 B CN 101030939B
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Abstract
The invention is used for helping multi SPC services with same source and same destination to rapidly establish label-switching path, and at the same time, ensuring the label-switching establishment of said SPC services not to be failure due to insufficient resources, and to rapidly recover from the failure. The method comprises: according to the request, calculating at least one group of route passing through same nodes, and along with said group of routes, establishing one group of label-switching path once. The apparatus thereof comprises a calculation requesting module, a path calculating module and a path establishing module.
Description
Technical field
The present invention relates to the optical network communication field, particularly set up, recover the method and the device of label switched path in the ASON.
Background technology
Compare with traditional optical transfer network, ASON (Automatic Switched Optical Network, ASON) topmost difference is exactly to transmit on the plane at light and introduces control plane, and the management system of traditional optical transfer network is developed into novel multi-layer facial canal reason structure based on management plane, control plane and transmission plane.Control plane is one of topmost feature of ASON, and it uses the GMPLS agreement, sets up professional by SC (Switched Connection, exchange connects) and two kinds of connection types of SPC (Soft PermanentConnection, soft permanent connection).Can automatically set up, safeguard and remove end-to-end at short notice or the part path by the control plane function, and can when network failure, realize dynamically recovering by alternative protection path.
At present, the ASON IN service is mainly based on the SPC business.The ASON intelligent network can be than setting up professional and dynamically carry out fault recovery more quickly, and for the foundation and the recovery of many business of homology chummage, prior art adopts following dual mode:
1. carry out business configuration one by one by webmaster, every professional corresponding LSP (Label Switched Path, label switched path), transmitting order to lower levels carries out the foundation of LSP to control plane then, and the foundation of many LSP all is mutually independently.The mode of this LSP of foundation is inconvenient to manage, and has also influenced the professional efficient of setting up simultaneously, and when link failure occurring, LSP need recover item by item, and resume speed is slower, can have influence on the performance of fault recovery.
2. be many business configuration a LSP, the bandwidth of LSP be the bandwidth of many business tired and.Finish the function that a LSP sets up many business by expansion flow parameter object (Traffic Parameters).Referring to Fig. 1, MT represents the number of many business that bandwidth on demand is identical among the LSP.This mode is the same with the process of setting up a professional corresponding LSP, just the total bandwidth of many business is embodied on the flow parameter, and each node needs MT the bandwidth capacity in the bandwidth parameter.In the process that LSP sets up owing to need be many business configuration a LSP, if can not find many business tired and bandwidth will cause LSP to set up failure.Because many business are tied up LSP of dead one-tenth, are unfavorable for independent management.When a business among this LSP breaks down, need recover all business, at this moment, if can not find many business tired and bandwidth can't set up a LSP, cause recovering failure.
Summary of the invention
For many SPC business that make the homology chummage can either be set up apace, can guarantee can not cause the road through setting up failure again owing to being deficient in resources, and can be fast when fault, recover neatly, the embodiment of the invention provides and has set up in the ASON, recovered the method and the device of label switched path.Described technical scheme is as follows:
Set up the method for label switched path in the ASON, said method comprising the steps of:
First node receives the request of setting up many homology chummage label switched paths;
Calculate at least one group of route according to described request, the node of same group of interior route process is identical, and has at least one group of route to comprise at least two routes, and the route sum of described calculating equates with the label switched path sum of requirement foundation in the described request;
Once set up the one group label switched path corresponding along described every group of route respectively with this group route, be specially: first node is along this group route transmit path foundation to downstream node request, comprise this group number of paths and this group ID of trace route path in the described request, described group number of paths is identical with this group route quantity; After downstream node in this group route is received the path request of setting up, set up the path of equal number, and the path of setting up is identified with this group ID of trace route path according to described group number of paths.
The embodiment of the invention also provides the method for recovering label switched path in the ASON; after setting up work tap switching path and protection label switched path; first node is received work tap switching path fault notification; the failure judgement type; if link failure; the work tap switching path group corresponding protection label switched path group that then activates and break down; then work tap switching path group all is switched to protection label switched path group; if the connection fault, the wall scroll label switched path that then will produce fault is switched to the corresponding protection label switched path.
The embodiment of the invention also provides the device of setting up label switched path in the ASON, and described device comprises that path computing request module, path calculation module and path set up module;
Described path computing request module is used to receive the request of setting up many homology chummage label switched paths, and described request sent to described path calculation module, also be used to receive at least one group of route that described path calculation module sends, and described at least one group of route sent to described path set up module;
Described path calculation module is used to receive the request that described path computing request module sends, calculate at least one group of route according to described request, the node of the route process in same group is identical, and have at least one group of route to comprise at least two routes, the route sum of described calculating equates with the label switched path sum of requirement foundation in the described request, and at least one group of route that will calculate sends to described path computing request module;
Described path is set up module and is comprised that request unit is set up in the path and path state block is set up the unit, described path is set up request unit and is used to receive at least one group of route that described path computing request module sends, first node is set up request along described every group of all identical route of process node to its downstream node transmit path, described path set up the label switched path quantity that comprises every group in the request and and this group ID of trace route path, described to organize number of paths identical with this group route quantity; After described path state block is set up the unit and is used for described downstream node and receives that request is set up in described path, set up the path of equal number, and the path of setting up is identified with this group ID of trace route path according to described group number of paths.
The embodiment of the invention also provides the device that recovers label switched path in the ASON, and described device comprises fault receiver module and fault judgement and recovers module;
Described fault receiver module is used for after setting up work tap switching path and protection label switched path, and first node receives work tap switching path fault notification, and described fault notification is sent to fault judgement and recovers module;
Described fault judgement and recovery module are used for the failure judgement type; if link failure; the work tap switching path group corresponding protection label switched path group that then activates and break down; then work tap switching path group all is switched to protection label switched path group; if the connection fault is then recovered the wall scroll label switched path.
Set up, recover the method and the device of label switched path in the ASON that adopts the embodiment of the invention to provide, in the process that label switched path is set up, owing to calculated at least one group of work route through same node point, thereby first node need all not move one time signaling when setting up every strip label switching path, only need at signaling of one group of route operation, once set up all label switched paths in this group, improve the efficient that label switched path is set up, simplified operation.Simultaneously, when the path resource is not enough, can calculate the work routes of many groups through same node point, reduced since can not find many business tired and bandwidth will cause label switched path to set up the situation of failure.
When breaking down,, thereby has very strong flexibility because the embodiment of the invention adopts different recovery schemes at different fault types.
Description of drawings
Fig. 1 connects the parameter object schematic diagram in the prior art;
Fig. 2 is the embodiment of the invention 1 a described method flow diagram of setting up label switched path;
Fig. 3 is the embodiment of the invention 2 described method flow diagrams of setting up label switched path;
Fig. 4 is the embodiment of the invention 4 described method flow diagrams of setting up label switched path;
Fig. 5 is the described Session object of an embodiment of the invention schematic diagram;
Fig. 6 is the described IPV4 Association of an embodiment of the invention object schematic diagram;
Fig. 7 is the described IPV6 Association of an embodiment of the invention object schematic diagram;
Fig. 8 is the described IPV4 Sender of an embodiment of the invention Template object schematic diagram;
Fig. 9 is the described IPV6 Sender of an embodiment of the invention Template object schematic diagram;
Figure 10 is the described Label REO/RRO of an embodiment of the invention subobject schematic diagram;
Figure 11 is the schematic diagram that the many label switched paths of the embodiment of the invention 5 described homology chummages are set up;
Figure 12 be the many label switched paths of the embodiment of the invention 6 described homology chummages when setting up component tear the schematic diagram of situation open;
Figure 13 is a structure drawing of device of setting up label switched path in the embodiment of the invention 7 described ASONs;
Figure 14 is the device that recovers label switched path in the embodiment of the invention 8 described ASONs.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but the present invention is not limited to following examples.
Referring to Fig. 2, the embodiment of the invention discloses the method for setting up label switched path in the ASON, concrete steps are as follows:
Step 101: professional first node receives the request of n bar to the work tap switching path of the homology chummage of certain destination node of setting up.
If the bandwidth of every strip label switching path is identical in the request, and other connection features is also identical, then these connection features can be used a connection attribute parametric representation in the signaling.
If the bandwidth difference of every strip label switching path in the request, or other connection features is also different, and then these connection features need be used a plurality of connection attribute parametric representations in the signaling.
Bandwidth with every strip label switching path in the request in the present embodiment is all example mutually.
Step 102: first node sends to PCE (Path ComputationElement, path-calculating element) to the computation requests of this work tap switching path.
Step 103:PCE calculates the n bar through the identical work route of node, and returns to first node.
Step 104: first node distributes working group's sign (GroupID promptly works) based on local policy.Then from first node, the n bar that calculates along PCE moves a signaling through all identical work route of node, once set up n bar work tap switching path, and this n strip label switching path bound one group, the work GroupID that the corresponding above-mentioned first node of this group label switched path distributes.
In some cases, first node also needs to set up the protection label switched path after having set up the work tap switching path.Referring to Fig. 3, concrete steps are as follows:
Step 201: professional first node receives sets up the n bar to the request of the work tap switching path of the homology chummage of certain destination node with set up the request of n bar to the protection label switched path of the homology chummage of certain destination node.Particular content is identical with step 101, repeats no more.
Step 202: first node sends to PCE to the computation requests of this work tap switching path and protection label switched path.
Step 203:PCE calculates the n bar and returns to first node with the n bar through the identical protection route of node through the identical work route of node.
Step 204: first node based on local policy share out the work GroupID and the protection GroupID.And in signaling correlation protection GroupID.Then from first node, the n bar that calculates along PCE moves a signaling through all identical work route of node, once set up n bar work tap switching path, and this n strip label switching path bound one group, the corresponding above-mentioned first node assignment GroupID of this group label switched path.
Step 205: after first node has been set up n bar work tap switching path, related job GroupID in signaling.The n bar that calculates along PCE moves a signaling through all identical protection route of node then; (this protection label switched path just carries out resource reservation at control plane once to set up n bar protection label switched path; do not issue to be crossed to and transmit the plane); and be one group with this n bar protection label exchange path binding, the protection GroupID that the corresponding above-mentioned first node of this group label switched path distributes.
In some cases, PCE can not calculate the n bar through the identical route of node, at this moment, in the step 203 of the step 103 of embodiment 1 and embodiment 2, PCE can be connected situation with all LSP based on the whole network resource, some low level LSP is optimized or seizes, return to first node through all identical LSP of node to obtain the n bar.Wherein, optimization is meant in following resource of the LSP of low priority traffic correspondence of the not enough situation of resource and discharges, and is used to set up new path, sets up new path for this low priority traffic simultaneously.Seize and be meant in following resource of the LSP of low priority traffic correspondence of the not enough situation of resource and discharge, be used to set up new LSP, this low priority traffic is no longer set up new LSP.All the other steps are identical with embodiment 1,2, repeat no more here.
When PCE can not calculate the n bar through the identical route of node, except taking optimization or the preemptive policy among the embodiment 3, also route can be split into a plurality of groups, route in same group is through same node point, for example be split as m group (m＜n), m is organized route return to first node, first node moves m bar signaling simultaneously and sets up n bar LSP.Setting up the work tap switching path with service needed is example, and referring to Fig. 4, concrete steps are as follows:
Step 301: professional first node receives the request of n bar to the work tap switching path of the homology chummage of certain destination node of setting up.Particular content is identical with step 101, repeats no more.
Step 302: first node sends to PCE to the computation requests of this work tap switching path.
Step 303:PCE can't calculate the n bar through the identical work route of node, and n bar work route is split into the m group, and every group comprises K
i(i=1 ..., m) bar work route, the work route in same group is all passed through same node point, m＜n here,
And the m that will obtain after will splitting organizes altogether, and n bar work route returns to first node.
Step 304: first node distributes m work GroupID based on local policy.Work route for each batch total calculates from first node, calculates K along PCE
iBar is once set up K through all identical signaling of work route operation of node
iBar work tap switching path, and to 1 work of this set of dispense GroupID.Like this, final first node operation m sets up n bar work tap switching path all over signaling, and this n bar work tap switching path is bound the m group, corresponding respectively 1 the work GroupID of each group work tap switching path.
In actual applications, the foregoing description 1,2,4 also can not disposed PCE, is calculated at this node by first node.This dual mode is as broad as long aspect signaling process.Adopt the benefit of PCE to be, when needs were seized the resource of some low priority traffics, PCE can connect situation based on the whole network resource and all LSP, some LSP is optimized, thereby vacates the business that some resources are set up the homology chummage.
In the foregoing description 1,2,3,4, first node can be provided with strategy such as whether to split, seize.
Set up operating path and protection path according to the foregoing description after; after first node is received work tap switching path fault notification; meeting failure judgement type; if link failure; then moving a signaling activates and the described work tap switching path group corresponding protection label switched path group that breaks down; then work tap switching path group all is switched to protection label switched path group; if the connection fault, the wall scroll label switched path that then will produce fault is switched to the corresponding protection label switched path.
The described technical scheme of the foregoing description can realize with the RSVP-TE of GMPLS, also can adopt CR-LDP to realize, both do not have the difference of essence, are that example is described concrete protocol extension and realization below with RSVP-TE therefore.
In embodiments of the present invention, original signaling process does not need to change, and only needs some following objects of expansion, and does some corresponding processing.
1. in Session (session) object, increase " Conn Num ", " GroupID " attribute,, be the Session object referring to Fig. 5.Wherein, Conn Num (8bits) is the label switched path number of homology chummage business, and GroupID (16bits) is group ID.
2. in Association (association) object, increase a GroupID, be used for related job GroupID and protection GroupID,,,, be IPV6 Association object referring to Fig. 7 for IPV4 Association object referring to Fig. 6.
3. the LSP ID in Sender Template Object (transmission template object) object is expanded to the LSP ID that can deposit a plurality of label switched paths according to the order of sequence.Referring to Fig. 8,,, be IPV6 SenderTemplate object referring to Fig. 9 for IPV4 Sender Template object.
4. with Label ERO (Explicit Route Object, the displayed record object)/RRO (Record Route Object, the record path object) object extension referring to Figure 10, is the LabelERO/RRO subobject for depositing the upstream and downstream label of a plurality of label switched paths.
Referring to Figure 11, the embodiment of the invention is described further below in conjunction with instantiation:
Step 401: first node A receives 3 service request with certain same band to node E, and these service needed preset the protection label switched path.And be provided with can split-packet, can seize and optimize low priority traffic.Node A sends to PCE to this request and carries out path computing.
After step 402:PCE receives this path computing request, calculate 3 work routes and all pass through A-B-C-D-E, corresponding 3 protection routes can show and specify corresponding label through A-F-H-G-E simultaneously.Then, these routes of calculating are returned to node A.If PCE, can not calculate 3 because some inadequate resource through node identical work route or protection routes, can be by removing some low-level LSP, obtain 3 through the identical work route of node or the purpose of protection route to reach.
Step 403: node A initiates Path message to downstream node, and referring to Fig. 5, the Conn Num that is provided with in the Session object is 3, and distributes a Group ID to insert among the Group ID of Session object in this locality.Referring to Fig. 8 or Fig. 9, in Sender TemplateObject object, insert local 3 LSP ID values of distributing.Referring to Figure 10, carry corresponding display label value at Label ERO subobject.Because present embodiment need be set up the protection label switched path,, in the GroupID of Association object, insert protection Group ID referring to Fig. 6, Fig. 7.Other connection attribute is with of the prior art identical.
Step 404: after Node B receives Path message, set up PSB (the Path State Block of 3 LSP respectively by standard procedure, path state block), according to prior art in identical connection attribute carry out other corresponding path connection processing (as carry out datum plane intersect), these three LSP are bound into one group, the sign of this group identifies with the work Group ID in the Session object, and sends Path message then downstream to node C.
Step 405: after node C, D received Path message, treatment step was similar with Node B.
Step 406: after node E received Path message, treatment step was similar with Node B.Simultaneously, set up the RSB (Resv State Block, reservation state block) of 3 LSP respectively, according to prior art in identical connection attribute carry out other corresponding path connection processing (as carry out datum plane intersect).These three LSP identify with the work Group ID in the Session object, and upstream send Resv message then.
Step 407: after node D receives Resv message, set up the RSB status block of 3 LSP respectively, its corresponding path connection processing of Xingqi of going forward side by side (as carry out datum plane intersect) by standard operation.
Step 408: after node C, B, A received Resv message, treatment step was similar to the treatment step of Resv message with node D.
Step 409: whole work tap switching path is set up and is finished.Node A initiates to set up the protection label switched path then.
Step 410: the protection label switched path is according to the similar processing of work tap switching path.Referring to Fig. 6 or Fig. 7, in the Group of Association object ID, insert work Group ID.Thereby, related with protection label switched path group work tap switching path group.
By above-mentioned steps, professional foundation has just been finished.Because 3 work tap switching paths that PCE calculates all pass through identical node A-B-C-D-E respectively, as long as thereby set the parameter of Path message in the above-mentioned steps, just can disposablely send to downstream node and set up successfully until the work tap switching path.
After described scheme has been set up operating path and protection path according to present embodiment; when work tap switching path generation link failure when (as disconnected fine); disconnected fine as taking place between node C and the node D; then node D announces fault message to node A; it is link failure that node A judges; then move a signaling and activate Group1 ', then work tap switching path group all is switched to protection label switched path group.If certain the bar LSP in this group breaks down, the wall scroll label switched path that produces fault can be switched to the corresponding protection label switched path.
Even if remove some low-level LSP, PCE can not calculate all work routes and pass through identical node, then PCE can be split into several groups to these work routes and calculates, and the corresponding protection route is handled too.
Referring to Figure 12,5 label switched paths to the homology chummage of node E are set up in node A request, because PCE can not calculate 5 routes of passing through same node point, can only calculate 2 route and 3 routes of all passing through other one group of same node point of all passing through same node point respectively.So, PCE splits into 2 groups to 5 routes and binds, wherein 2 work tap switching paths are bound into one group, it is Group1 that work tap switching path ID is set, wherein 3 work routes are bound into one group, it is Group2 that work route ID is set, and 2 times signalings of node A operation are set up the work tap switching path of Group1 and Group2 respectively.The corresponding protection label switched path also splits into Group1 ' and Group2 '.
Referring to Figure 13, the embodiment of the invention also provides the device of setting up label switched path, comprises that path computing request module 401, path calculation module 402 and path set up module 403.
Wherein, path computing request module 401 is positioned at first node, be used to receive the request of setting up many homology chummage label switched paths, and described request sent to described path calculation module 402, also be used at least one group of route that RX path computing module 402 sends, and at least one group of route that path calculation module 402 sends sent to the path set up module 403.
In some cases, path calculation module 402 can't calculate all label switched paths and all pass through identical node, when path calculation module 402 is path-calculating element 402a, can increase a unit 402b of path optimization, be used for connecting situation based on the whole network resource and all LSP in computational process, some low level label switched path is optimized or seizes, to obtain resource.Thereby path calculation module 402 comprises path-calculating element 402a and the unit 402b of path optimization at this moment.
The path is set up module 403 and is used at least one group of route that RX path computation requests module 401 sends, and once sets up the one group label switched path corresponding with this group route along described every group of route respectively.
The path is set up module 403 and is comprised that specifically the path sets up that request unit 403a, path state block set up unit 403b, response unit 403c is set up in the path and reservation state block is set up unit 403d;
The path is set up request unit 403a and is used for first node and sets up request through all identical route of node to its downstream node transmit path along described every group, and described path is set up in the request and comprised every group label switched path number, the sign and the connection attribute of group;
After path state block is set up unit 403b and is used for described downstream node and receives that request is set up in described path, set up the path state block of setting up the label switched path number equal number in the request with described path, the connection attribute of setting up in the request according to described path carries out the path connection processing, with described path binding is one group, described group the sign that is designated the group in the foundation request of described path, continue to send described foundation request through all identical route of node along described to its downstream node, and finish the processing identical with its upstream node, until destination node;
After the path is set up response unit 403c and is used for described destination node and finishes the processing identical with its upstream node according to the request of setting up of described path, one group of all identical route of process node along described calculating is set up response to its upstream node transmit path, and described path is set up in the response and comprised every group label switched path number, the sign and the connection attribute of group;
After reservation state block is set up unit 403d and is used for destination node and finishes the processing identical with its upstream node, set up the reservation state block of setting up the label switched path number equal number in the request with described path, identifying described reservation state block is the sign that the group in the request is set up in described path, and the connection attribute of setting up in the request according to described path carries out the path connection processing;
After reservation state block is set up unit 403d and also is used for described upstream node and receives that response is set up in described path, set up the reservation state block of setting up the label switched path number equal number in the response with described path, the connection attribute of setting up in the response according to described path carries out the path connection processing, described ID of trace route path is the sign that the group in the response is set up in described path, continue to send the foundation response of described path through all identical path of node along described to its upstream node, and finish the processing identical with its downstream node, until first node.
Said apparatus can be used to set up the work tap switching path, also can be used for setting up after having set up the work label switched path protection label switched path again.Set up the situation of protecting label switched path at needs, the described device of the embodiment of the invention also needs a relating module, is used for work tap switching path and protection label switched path are associated.
Referring to Figure 14, the embodiment of the invention also provides the device that recovers label switched path in the ASON, and this device comprises fault receiver module 501 and fault judgement and recovers module 502.
Fault judgement and recovery module 502 are used for the fault notification according to 501 transmissions of fault receiver module; the failure judgement type; if link failure; then moving a signaling activates and the described work tap switching path group corresponding protection label switched path group that breaks down; then work tap switching path group all is switched to protection label switched path group; if the connection fault is then recovered described wall scroll label switched path.
The device of the described recovery label switched path of present embodiment is used for carrying out fault recovery after the embodiment 7 described devices of setting up label switched path have been set up work label switched path and protection label switched path.
Embodiment of the present invention is in the process that label switched path is set up, owing to calculated at least one group of work route through same node point, first node only need move signaling one time, once set up n strip label switching path (if be divided into the m group, only need operation m all over signaling), thereby first node need all not move signaling one time when setting up every strip label switching path, improved the efficient that label switched path is set up, and simplified operation.
Simultaneously, because can be in the process of calculating route when the path resource be not enough, can calculate many group routes, the route in wherein same group is through identical node, reduced since can not find many business tired and bandwidth will cause label switched path to set up the situation of failure.
The embodiment of the invention can adopt different recovery schemes at different fault types, has very strong flexibility.
To be that active link takes place disconnected when fine when fault type, and first node detection move signaling and activated n bar protection label switched path (if be divided into the m group, all that just need that signaling of operation activates this group are protected label switched paths) after fault.Do not recover label switched path owing to do not need to move n when activating all over signaling, thereby reduced failure recovery time.
When fault type breaks down for certain the bar LSP in this group, the wall scroll label switched path that produces fault can be switched to the corresponding protection label switched path, and need not the label switched path that recovers all.Increase the fault recovery flexibility like this, also reduced failure recovery time simultaneously.
N strip label switching path can manage based on the wall scroll label switched path, also can manage based on a group, with the existing protocol compatibility.
Above-described embodiment is a kind of more preferably embodiment of the present invention, and common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacement all should be included in protection scope of the present invention.
Claims (10)
1. set up the method for label switched path in the ASON, it is characterized in that, said method comprising the steps of:
First node receives the request of setting up many homology chummage label switched paths;
Calculate at least one group of route according to described request, the node of same group of interior route process is identical, and has at least one group of route to comprise at least two routes, and the route sum of described calculating equates with the label switched path sum of requirement foundation in the described request;
Once set up the one group label switched path corresponding along described every group of route respectively with this group route, be specially: first node is along this group route transmit path foundation to downstream node request, comprise this group number of paths and this group ID of trace route path in the described request, described group number of paths is identical with this group route quantity; After downstream node in this group route is received the path request of setting up, set up the path of equal number, and the path of setting up is identified with this group ID of trace route path according to described group number of paths.
2. set up the method for label switched path in the ASON as claimed in claim 1, it is characterized in that, the described step of calculating at least one group of route according to described request specifically comprises:
First node sends the label switched path computation requests to path-calculating element;
Described path-calculating element calculates described at least one group of label switched path according to the label switched path computation requests of receiving, and described at least one group of label switched path returned to first node.
3. set up the method for label switched path in the ASON as claimed in claim 2, it is characterized in that the described step of calculating at least one group of route according to described request also comprises: the step that based on the whole network resource the low level label switched path is optimized or seizes in computational process.
4. as setting up the method for label switched path in any described ASON of claim among the claim 1-3, it is characterized in that described label switched path is the work tap switching path.
5. as setting up the method for label switched path in any described ASON of claim among the claim 1-3; it is characterized in that; described label switched path comprises work tap switching path and protection label switched path, and correspondingly, described method specifically may further comprise the steps:
First node receives the request of setting up many homology chummage work tap switching paths and protection label switched path;
Calculate at least one group of work route and at least one group of protection route according to described request, the node of the route process in same group is identical, and have at least one group of route to comprise at least two routes, the sum of the work route of described calculating and protection route requires the work tap switching path of foundation and the sum of protection label switched path to equate respectively with in the described request;
Once set up the one group work tap switching path corresponding, correlation protection label switched path group along described every group of work route respectively with this group route;
Once set up the one group protection label switched path corresponding, related job label switched path group along described every group of protection route respectively with this group route.
6. use the method for setting up label switched path in the ASON as claimed in claim 5 for one kind; recover the method for label switched path; it is characterized in that; after setting up work tap switching path and protection label switched path; first node is received work tap switching path fault notification; the failure judgement type; if link failure; the work tap switching path group corresponding protection label switched path group that then activates and break down; then work tap switching path group all is switched to protection label switched path group; if the connection fault, the wall scroll label switched path that then will produce fault is switched to the corresponding protection label switched path.
7. set up the device of label switched path in the ASON, it is characterized in that, described device comprises that path computing request module, path calculation module and path set up module;
Described path computing request module is used to receive the request of setting up many homology chummage label switched paths, and described request sent to described path calculation module, also be used to receive at least one group of route that described path calculation module sends, and described at least one group of route sent to described path set up module;
Described path calculation module is used to receive the request that described path computing request module sends, calculate at least one group of route according to described request, the node of the route process in same group is identical, and have at least one group of route to comprise at least two routes, the route sum of described calculating equates with the label switched path sum of requirement foundation in the described request, and at least one group of route that will calculate sends to described path computing request module;
Described path is set up module and is comprised that request unit is set up in the path and path state block is set up the unit, described path is set up request unit and is used to receive at least one group of route that described path computing request module sends, first node is set up request along described every group of all identical route of process node to its downstream node transmit path, described path is set up and is comprised every group label switched path quantity and this group ID of trace route path in the request, and described group number of paths is identical with this group route quantity; After described path state block is set up the unit and is used for described downstream node and receives that request is set up in described path, set up the path of equal number, and the path of setting up is identified with this group ID of trace route path according to described group number of paths.
8. set up the device of label switched path in the ASON as claimed in claim 7, it is characterized in that, node or path-calculating element headed by the described path calculation module.
9. set up the device of label switched path in the ASON as claimed in claim 8, it is characterized in that, described path calculation module also comprises the optimization unit, is used for the low level label switched path being optimized or seizing based on the whole network resource in path-calculating element computational process.
10. use the method for setting up label switched path in the ASON as claimed in claim 5 for one kind, recover the device of label switched path, it is characterized in that, described device comprises fault receiver module and fault judgement and recovers module;
Described fault receiver module is used for after setting up work tap switching path and protection label switched path, and first node receives work tap switching path fault notification, and described fault notification is sent to fault judgement and recovers module;
Described fault judgement and recovery module are used for the failure judgement type; if link failure; the work tap switching path group corresponding protection label switched path group that then activates and break down; then work tap switching path group all is switched to protection label switched path group; if the connection fault is then recovered the wall scroll label switched path.
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| CN2007100648033A CN101030939B (en) | 2007-03-27 | 2007-03-27 | Method and apparatus for establishing and restoring label exchange path in automatic-exchange optical network |
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| CN2007100648033A CN101030939B (en) | 2007-03-27 | 2007-03-27 | Method and apparatus for establishing and restoring label exchange path in automatic-exchange optical network |
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