CN106487674A - Meet the ASON method for routing of optical-fiber longitudinal difference relay protection requirement - Google Patents
Meet the ASON method for routing of optical-fiber longitudinal difference relay protection requirement Download PDFInfo
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- CN106487674A CN106487674A CN201610690099.1A CN201610690099A CN106487674A CN 106487674 A CN106487674 A CN 106487674A CN 201610690099 A CN201610690099 A CN 201610690099A CN 106487674 A CN106487674 A CN 106487674A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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Abstract
The present invention is a kind of ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement.The present invention includes following content：1）Before fault, for every ASON passage, the setting preset route of N bar, the business source of ASON passage and egress corresponding A node and Z node respectively, the set-up mode of preset route is manually specified for link by link system, the a plurality of preset routing label setting is 1～N, is stored in the A node of ASON passage；2）When fault occurs, by routing label, order attempts recovery business from small to large.The a plurality of preset route of present invention setting and its logic of mutual cooperating; restoration route is limited in the range of a plurality of preset route; and then reach ASON channel time delay can be managed, controlled, measurable purpose, make the requirement of ASON channel adaptation optical-fiber longitudinal difference protection business.
Description
Technical field
The present invention is a kind of ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement, particularly one
Plant and ensure ASON（ASON）Meet the method for routing to channel time delay requirement for the optical-fiber longitudinal difference relay protection business, belong to
In ensureing that ASON meets the innovative technology of the method for routing to channel time delay requirement for the optical-fiber longitudinal difference relay protection business.
Background technology
Electric power communication transmission network mainly adopts SDH technology at present.SDH is based on passage or multiplex section to the protection of business
Ring protection, can only resist N-1 fault, and N-2 fault can lead to service channel to interrupt.ASON（ASON）Technology is passed through
Increase control plane on the basis of SDH, realize dynamic rerouting recovering, as long as having up to route between service source destination node,
ASON control plane（Hereinafter referred to as ASON）Automatically service channel can be recovered, multipoint fault can be resisted.
One of current Primary communication mode of optical-fiber longitudinal difference relay protection is namely based on the 2M circuit of SDH.Because optical fiber is indulged
Difference relay protection requires the necessary transceiver path of passage consistent, and the spontaneous recovery ring protection of SDH cannot ensure this point, and therefore optical fiber is indulged
Difference relay protection 2M circuit can not configure Self-healing Rings, and reliability is low.Patent is " a kind of based on first tearing the automatic switched transport network built afterwards open
Self-healing recovery method "（ CN201210415370.2）Propose a kind of based on first tear the reforestation practices built afterwards open it is ensured that ASON passage receive
Send out path all the time unanimously, be that ASON can apply to carry the essential condition of optical-fiber longitudinal difference relay protection business.
For reaching the quick purpose excising fault, prevent that channel time delay is excessive to lead to circuit two ends protective relaying maloperation simultaneously
Make, industry requires optical-fiber longitudinal difference protection channel time delay to be necessarily less than certain threshold value（South electric network requires to be less than 12ms）.Even if depositing
In time delay more than 12ms up to route, business would rather lose passage and also do not allow the route long using time delay.And it is existing
ASON always calculate up to route and recover business, may result in channel time delay long.
Additionally, current SDH/ASON all cannot provide channel time delay on-line measurement function, and can only be obtained using Theoretical Calculation
To "ball-park" estimate.For obtaining accurate channel time delay, can only live pocket watch measurement.However, existing ASON occurs in fault
Before cannot learn its specific restoration route, can only artificial manufacturing fault after waiting ASON automatically to recover passage, then row measurement
Time delay, because the probability of N-1, N-2 or even N-n fault is too much it is impossible to traversal, this cannot learn recovery road before resulting in fault
By concrete time delay, more cannot effective management and control ASON channel time delay.
The router-level topology of existing ASON all derived from dijkstra's algorithm, is jumped or smallest link cost meter using based on the shortest
Calculate Optimization route, take into account TE Link resources left situation simultaneously.As long as between service source destination node exist one or more up to
Route, and it route enough bandwidth resources, ASON will calculate " the shortest " automatically（The link generation of fewest number of hops or approach
Valency and minimum）Restoration route, and execute recovery.
When existing ASON is applied to optical-fiber longitudinal difference protection business, there is problems with：
1）When fault lead between service source destination node up to route all exceed delay threshold（Such as 12ms）When, existing ASON
Still restoration route can be calculated and execute recovery.Now channel time delay, more than 12ms, is unsatisfactory for optical-fiber longitudinal difference relay protection industry
The requirement to time delay for the business.
2）Prior art cannot learn fault before fault after restoration route, therefore cannot carry out time delay to restoration route
Measurement." de- pipe " state that channel time delay is actually is it is impossible to control passage time delay is less than 12ms.
Content of the invention
It is an object of the invention to considering the problems referred to above and providing and a kind of meet the automatic of optical-fiber longitudinal difference relay protection requirement
Switched optical network method for routing.The present invention makes ASON channel time delay understand, can manage, controlled.
The technical scheme is that：The present invention meets the ASON road that optical-fiber longitudinal difference relay protection requires
By method, include following content：
1）Before fault, for every ASON passage, the preset route of N bar is set, ASON passage
Business source and egress corresponding A node and Z node respectively, the set-up mode of preset route is manually specified for link by link system, will set
The a plurality of preset routing label put is 1～N, is stored in the A node of ASON passage；
2）When fault occurs, by routing label, order attempts recovery business from small to large.
Described ASON passage as possesses the ASON heavy-route that G.8080 ITU-T advises
Recover the SDH circuit of function, be exclusively used in optical-fiber longitudinal difference relay protection business.
The route of described ASON passage is that a jump reaches, i.e. A-Z, or has multi-hop, i.e. A-B ... X-
Z, now B ..., X node be via node, that is, route approach node.
Described fault is the faulty set leading to ASON channel interrupt, including but not limited to optical cable
Fault, tail optical fiber fault, circuit light board faults.
If business is currently at Work route, and Work route breaks down, then：
11）First determine whether whether the 1st article of preset route is affected by fault, if it is not, extensive using the 1st article of preset route execution business
Multiple；
12）If the 1st article preset route is affected by fault, judge whether the 2nd article of preset route is affected by fault, if it is not, then adopting
With the 2nd article of preset route execution business recovery；
13）If the 2nd article preset route is also affected by fault, stop to attempt, interrupting service.
If business is currently at preset route, and current route breaks down, then：
21）First determine whether Work route whether fault, if it is not, being then directly returned to Work route；
22）If Work route is also faulty, judge whether the 1st article of preset route is affected by fault, if it is not, then adopting the 1st article
Preset route execution business recovery；
23）Order is attempted from small to large by number, once finding the preset route of non-fault, then adopts it to execute business recovery；
24）All preset routes are all affected by fault, then stop to attempt, interrupting service.
If business is currently at preset route, Work route fault-free, after executing artificial reply or automatic decision reply, directly
Connect and return on Work route.
Before described fault, for every ASON passage, 2～4 preset routes are set.
Described preset route is manually specified method be by automatically switched optical network pipe complete preset route increasing,
Delete, change, look into, comprise the following steps that：
31）First, select ASON passage to be configured, then increase preset route newly for it：If this automatic exchange
Currently without any preset route, the preset routing label now configuring is 1 to optical network path；If this ASON leads to
Road currently has the preset route of n bar, wherein n<N, N are the preset number of routes of maximum supported, the preset route now configuring is compiled
Number be n+1；If this ASON passage currently has the preset route of N bar, do not allow to be further added by preset route, only permit
Permitted to delete preset route；
32）The method specifying preset route：Preset being routed across is selected on automatically switched optical network topological diagram by webmaster
All links, connected with a pair of optical fiber between the light board of two automatic switching optical network devices, that is, form a link, net
Can pipe be verified that these link first places connect and be formed a complete route, if checking is not passed through, reports an error；If being verified,
Complete to specify；As shown in Fig. 2 link L4, L5, L6, L7, L8 should be selected on webmaster so as to form complete first preset
Route；
33）Newly-increased preset route instruction, the numbering of preset route, concrete route data are issued to by webmaster by signaling communication network
Preserve in the A node of ASON passage；
34）Select ASON passage to be configured, select the preset route of a certain bar, can delete or change preset road
By, during execution deletion action, deletion instruction and preset routing label to be deleted are sent to certainly by webmaster by signaling communication network
The A node of dynamic switched optical network passage, executes deletion action by A node, if deleting the preset route that numbering is n, also needs to compile
The numbering of all preset route number more than n subtracts 1 automatically；During execution change operation, change is referred to by webmaster by signaling communication network
Make, preset routing label to be changed and the newly preset route specified are sent to the A node of ASON passage, by A
Node executes deletion action.
Described step 32）And step 33）The calling logic of preset route is as follows：
Specify the calling logic of preset route in the routing module control of ASON control plane, after determining the route called, A saves
Point initiates RSVP Signalling exchange, realizes resource transfer, and delete current failure on all ASON equipment on new restoration route
The resource taking in route.
Present invention proposition is a kind of to ensure that ASON meets the method for routing to channel time delay requirement for the optical-fiber longitudinal difference relay protection, therefore
The ASON restoration route of manual presetting business before barrier, during fault, ASON strictly presses preset route execution, does not allow ASON by business
Return in other not preset routes.The constraint of optical-fiber longitudinal difference relay protection ASON channel time delay, latency measurement can thoroughly be solved
A series of problems, such as, so that ASON channel time delay is understood, can manage, controlled.The present invention is a kind of convenient and practical to meet optical-fiber longitudinal difference
The ASON method for routing that relay protection requires.
Brief description
Fig. 1 is the state machine diagram of the preset route recovery logic of the embodiment of the present invention.
Fig. 2 is the application example of the embodiment of the present invention preset route recovery logic under certain scene.
Specific embodiment
Embodiment：
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further.
With reference to Fig. 1, the present invention meets the ASON method for routing that optical-fiber longitudinal difference relay protection requires（With 2
As a example the preset route of bar）, including following content：
The method that preset route is manually specified is as follows：
By ASON（Referred to as：ASON）Webmaster completes the increasing of preset route, deletes, changes, looking into：
1）First, select ASON to be configured（ASON）Passage, then increases preset route newly for it：If this ASON
Currently without any preset route, the preset route now configuring is the first preset route to passage；If this ASON passage is current
There are the preset route of n bar, n<N, N are the preset number of routes of maximum supported, the preset route now configuring is the (n+1)th preset road
By；If this ASON passage currently has the preset route of N bar, do not allow to be further added by preset route, only allow to delete preset route.
2）The method specifying preset route：The preset all chains being routed across are selected on ASON net topology figure by webmaster
Road, is connected with a pair of optical fiber between the light board of two ASON equipment, that is, form a link, and webmaster verifies that these links are the first
Connect and can form a complete route, if checking is not passed through, report an error；If being verified, complete to specify.As shown in Fig. 2
Link L4, L5, L6, L7, L8 should be selected on webmaster so as to the preset route of complete first can be formed.
3）Webmaster passes through signaling communication network（DCN）By newly-increased preset route instruction, the numbering of preset route, specifically it route number
According to（The link of approach）It is issued in the A node of ASON passage and preserve.
4）Select ASON passage to be configured, select the preset route of a certain bar, can delete or change preset route.Execution is deleted
During division operation, webmaster passes through signaling communication network（DCN）Deletion instruction and preset routing label to be deleted are sent to ASON and lead to
The A node in road, executes deletion action by A node, if deleting the preset route that numbering is n, also needs numbering is all pre- more than n
The numbering putting route subtracts 1 automatically；During execution change operation, webmaster passes through signaling communication network（DCN）By change directive, to be changed
Preset routing label and the newly preset route specified are sent to the A node of ASON passage, execute deletion action by A node.
The calling logic of preset route is as follows：
Routing module control in ASON control plane（RC module）In specify the calling logic of preset route, determine the road called
By rear, A node initiation RSVP Signalling exchange, all ASON equipment on new restoration route realize resource transfer, and deletes
The resource taking in current failure route：
If 1 business is currently at Work route, and Work route breaks down, then：
1）First determine whether whether the first preset route is affected by fault, if it is not, using the first preset route execution business recovery.
2）If the first preset route is affected by fault, judge whether the second preset route is affected by fault, if it is not, then adopting
With the second preset route execution business recovery.
3）If the second preset route is also affected by fault, stop to attempt, interrupting service.
If 2 business are currently at preset route, and current route breaks down, then：
1）First determine whether Work route whether fault, if it is not, being then directly returned to Work route.
2）If Work route also fault, judge whether the second preset route is affected by fault, if it is not, then adopting the 1st article
Preset route execution business recovery.
3）Order is attempted from small to large by number, once finding the preset route of non-fault, then adopts its execution business extensive
Multiple.
4）All preset routes are all affected by fault, then stop to attempt, interrupting service.
If 3 business are currently at preset route, Work route fault-free, after executing artificial reply or automatic decision reply,
It is directly returned on Work route.
In Fig. 1, the condition of state transfer is as follows：
First state：Work route fault-free；
Second state：First preset route fault-free；
The third state：Work route, the second equal fault of preset route；
4th state：Work route, the first equal fault of preset route；
5th state：Work route fault, and the second preset route fault-free；
6th state：Work route fault, the first preset route fault-free；
7th state：First preset routing failure, and the second preset route fault-free；
8th state：First preset route, the second equal fault of preset route；
First condition：Work route breaks down；
Second condition：First preset route breaks down；
Third condition：Second preset route breaks down；
Fourth condition：Manually/automatically reply；
Fifth condition：Work route is detected and recover normal；
Article 6 part：The first preset route 1 is detected and recover normal；
Article 7 part：The second preset route recovery is detected normal；
In Fig. 1, circular frame is current routing state, and that is, which bar route current ASON passage is in.Band arrow line represents
State shifts, and the word on line is the essential condition that the transfer of this state occurs.Essential condition includes route quality（Certain route
With/without fault）And trigger condition（Certain route breaks down/recovers normal, or manually/automatically reply）.It is route with current
As a example shifting to the state currently routeing as Work route for the preset state routeing 1（Near the band arrow at top in corresponding Fig. 2
Head line）, currently it route as the first preset route, and Work route fault-free（First state）, now manually/automatically reply（The
Four conditions）, replying operation can be successful, currently route as Work route after the completion of operation.
Two principles are followed in state transfer shown in Fig. 2：1）During current routing failure, by Work route>First preset road
By>Second preset route 2>…>The priority of preset route n attempts rerouting recovering, if now the high route of priority is just located
In malfunction, then according to priority order attempts the lower route of priority.2）If current route is not Work route, and now
Work route is in normal condition, if manually/automatically reply, passage switches back on Work route.
The Rule of judgment of Work route or preset routing failure is as follows：
Rule of judgment includes：Dropout（LOS）, LOF（LOF）, alarm instruction（AIS）, Loss Of Pointer（LOP）, the bit error rate
Out-of-limit（EXC）Deng the alarm on ASON equipment.（LOS, LOF, AIS, LOP, EXC refer to any equipment respectively, are said with Chinese full name
Bright）
On the corresponding smooth board of link on Work route or preset route, when above-mentioned alarm occurs, the ASON being alerted by appearance
The control plane of equipment according to alarm change LRM module on link circuit resource state, and by change after link circuit resource state to
The whole network floods.After the A node of ASON passage receives link circuit resource Status Change message, by corresponding Work route or preset route
It is designated unavailable, decide whether to start rerouting recovering according to the route that ASON passage is currently in simultaneously.
The application example of preset route recovery logic is as follows：
1 as shown in Fig. 2 taking 2 preset routes as a example, ASON channels operation, on Work route, configures 2 preset routes, the
One preset route, the second preset route, the A node of ASON passage is ASON equipment 1.
2nd, the first preset route first breaks down, and now ASON equipment 7 and ASON equipment 8 receive alarm, and start link
State floods, ASON equipment 1 receive after flooding by the first preset Route Distinguisher be unavailable.
3rd, Work route breaks down again, and now ASON equipment 2 and ASON equipment 4 receive alarm, and start Link State
Flood, ASON equipment 1 receives the next alarm of upstream transmission and floods, because current route is Work route, Work route is
It is subjected to fault impact, ASON equipment 1 starts rerouting recovering.Inquire about the state of the first preset route first, find that first is pre-
Put and route unavailable, the then state of inquiry the second preset route, find the second still available, ASON equipment of preset route
1 starts RSVP signaling and hands over along the ASON equipment 9 in the second preset route, ASON equipment 10, ASON equipment 11, ASON equipment 12
Mutually, complete resource transfer, and discharge the resource on Work route.
The present invention proposes and a kind of ensures that ASON meets the method for routing to channel time delay requirement for the optical-fiber longitudinal difference relay protection.
To solve that ASON channel time delay is unknowable, uncontrollable problem, and enable ASON passage to meet optical-fiber longitudinal difference relay protection business pair
The requirement of time delay.
ASON equipment 1～12 in Fig. 2 functionally indistinction each other, but play different under the scene of Fig. 2
Effect.ASON equipment 1,2 is used to the upper and lower road of business.ASON equipment 3～12 is the via node of ASON passage（It route approach
Node）, a forwarding service data, the upper and lower road of the business that is not used in.
Claims (10)
1. a kind of ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement it is characterised in that include just like
Lower content：
1）Before fault, for every ASON passage, the preset route of N bar is set, ASON passage
Business source and egress corresponding A node and Z node respectively, the set-up mode of preset route is manually specified for link by link system, will set
The a plurality of preset routing label put is 1～N, is stored in the A node of ASON passage；
2）When fault occurs, by routing label, order attempts recovery business from small to large.
2. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
It is characterised by that described ASON passage as possesses the ASON heavy-route that G.8080 ITU-T advises
Recover the SDH circuit of function, be exclusively used in optical-fiber longitudinal difference relay protection business.
3. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
The route being characterised by described ASON passage is that a jump reaches, i.e. A-Z, or has multi-hop, i.e. A-B ... X-
Z, now B ..., X node be via node, that is, route approach node.
4. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
It is characterised by described fault by the faulty set leading to ASON channel interrupt, including but not limited to optical cable
Fault, tail optical fiber fault, circuit light board faults.
5. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
If the business of being characterised by is currently at Work route, and Work route breaks down, then：
11）First determine whether whether the 1st article of preset route is affected by fault, if it is not, extensive using the 1st article of preset route execution business
Multiple；
12）If the 1st article preset route is affected by fault, judge whether the 2nd article of preset route is affected by fault, if it is not, then adopting
With the 2nd article of preset route execution business recovery；
13）If the 2nd article preset route is also affected by fault, stop to attempt, interrupting service.
6. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
If the business of being characterised by is currently at preset route, and current route breaks down, then：
21）First determine whether Work route whether fault, if it is not, being then directly returned to Work route；
22）If Work route is also faulty, judge whether the 1st article of preset route is affected by fault, if it is not, then adopting the 1st article
Preset route execution business recovery；
23）Order is attempted from small to large by number, once finding the preset route of non-fault, then adopts it to execute business recovery；
24）All preset routes are all affected by fault, then stop to attempt, interrupting service.
7. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
If the business of being characterised by is currently at preset route, Work route fault-free, after executing artificial reply or automatic decision reply, directly
Connect and return on Work route.
8. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
Before being characterised by above-mentioned fault, for every ASON passage, 2～4 preset routes are set.
9. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
Be manually specified described in being characterised by preset route method be by automatically switched optical network pipe complete preset route increasing,
Delete, change, look into, comprise the following steps that：
31）First, select ASON passage to be configured, then increase preset route newly for it：If this automatic exchange
Currently without any preset route, the preset routing label now configuring is 1 to optical network path；If this ASON leads to
Road currently has the preset route of n bar, wherein n<N, N are the preset number of routes of maximum supported, the preset route now configuring is compiled
Number be n+1；If this ASON passage currently has the preset route of N bar, do not allow to be further added by preset route, only permit
Permitted to delete preset route；
32）The method specifying preset route：Preset being routed across is selected on automatically switched optical network topological diagram by webmaster
All links, connected with a pair of optical fiber between the light board of two automatic switching optical network devices, that is, form a link, net
Can pipe be verified that these link first places connect and be formed a complete route, if checking is not passed through, reports an error；If being verified,
Complete to specify；As shown in Fig. 2 link L4, L5, L6, L7, L8 should be selected on webmaster so as to form complete first preset
Route；
33）Newly-increased preset route instruction, the numbering of preset route, concrete route data are issued to by webmaster by signaling communication network
Preserve in the A node of ASON passage；
34）Select ASON passage to be configured, select the preset route of a certain bar, can delete or change preset road
By, during execution deletion action, deletion instruction and preset routing label to be deleted are sent to certainly by webmaster by signaling communication network
The A node of dynamic switched optical network passage, executes deletion action by A node, if deleting the preset route that numbering is n, also needs to compile
The numbering of all preset route number more than n subtracts 1 automatically；During execution change operation, change is referred to by webmaster by signaling communication network
Make, preset routing label to be changed and the newly preset route specified are sent to the A node of ASON passage, by A
Node executes deletion action.
10. the ASON method for routing meeting optical-fiber longitudinal difference relay protection requirement according to claim 1, its
It is characterised by described step 32）And step 33）The calling logic of preset route is as follows：
Specify the calling logic of preset route in the routing module control of ASON control plane, after determining the route called, A saves
Point initiates RSVP Signalling exchange, realizes resource transfer, and delete current failure on all ASON equipment on new restoration route
The resource taking in route.
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| CN113727220A (en) * | 2020-05-26 | 2021-11-30 | 华为技术有限公司 | Service resource pre-configuration method, device and system |
| CN114040273A (en) * | 2021-10-25 | 2022-02-11 | 烽火通信科技股份有限公司 | Method and system for automatically adjusting route switching based on fault point |
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Application publication date: 20170308 |