CN1983960A - Method for returning service route - Google Patents
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- CN1983960A CN1983960A CNA2006100608332A CN200610060833A CN1983960A CN 1983960 A CN1983960 A CN 1983960A CN A2006100608332 A CNA2006100608332 A CN A2006100608332A CN 200610060833 A CN200610060833 A CN 200610060833A CN 1983960 A CN1983960 A CN 1983960A
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Abstract
This invention discloses a kind of returning method of the traffic route. This method includes the following steps: A, the current route is set as the original route by the net element or management of the source node and saved; B, when the failure in the current route is examined, the conscribed net element sets out the re-routing and constructs the connection, then the current route is changed from the original route to the restored route, and the original route resource is released; C, when the failure is recovered, the conscribed net element reads the information of the original route and builds up the relation, and then changes the restored route to the original route . This invention can enhance the utilization ratio of the net resource, reduce the cost of maintaining, alleviate the load of the operation and enhance the efficiency.
Description
Technical field
The present invention relates to communication technical field, especially in ASON (Automatic Switched OpticalNetworks, ASON), relate to the method that a kind of professional route is returned.
Background technology
ASON is the optical transfer network of new generation that can intelligentizedly finish optical-fiber network exchange linkage function automatically.After introducing ASON, professional protection form becomes more and more abundanter.Meanwhile, the network construction form of mesh network (Mesh Network) has become present main flow.When the network connection was broken down, business can spontaneously be carried out the heavy-route adjustment according to optimal situation at that time.Under this development trend, the survivability of network will strengthen greatly, but network also will become dynamic, as to change a complexity system simultaneously.After a large number of services because of various faults heavy-route takes place repeatedly, the professional route of the whole network may become very " at random ", and will be far from each other with initial professional route planning.This not only produces challenge greatly to the regular maintenance and the management of business, realizes that to adding a large number of services the network capacity extension has also increased difficulty and risk simultaneously.
In the face of this situation, the technical scheme that customer engineer or operation maintenance engineer can select for use mainly contains following two kinds:
Scheme one:
Adopt optimizational function to realize the professional route of online adjustment, promptly one by one initial route is returned in professional routing optimality adjustment by manual mode.So-called optimizational function refers to the user and evokes soft heavy-route service according to demand, promptly calls out rerouting mechanism for administrative purposes, comprises and carries out path optimization, network operation and project planning.The shortcoming of this scheme is: for large-scale optical-fiber network, the quantity of IN service is thousands of, to make workload become very huge with the professional route of manual type adjustment, the excessive low operating efficiency that workload caused has also just become the shortcoming that can not be ignored with expensive, and this method causes very big loss because of misoperation easily.
Scheme two:
The method that employing can recoverable professional route be returned is automatically operated.(for example, disconnected optical fiber) can recoverable business carry out heavy-route and generate restoration route automatically when network breaks down; Behind network disaster recovery (for example, optical fiber recovers), can recoverable professional meeting return initial route from the restoration route adjustment automatically.Though this scheme can reduce the phenomenon that causes professional route at random in a large number, but its shortcoming is: can recoverable business can not discharge initial route resource after heavy-route, its objective is for after guaranteeing that this fault disappears, can recoverable professional route one return according to initial routing iinformation surely.Can recoverable business can take two parts of resources in the network when thus, fault takes place: initial route resource and current route resource.Can recoverable business if all business all become, then network resource utilization is with step-down, and actual operation tends to pay very big cost.
Summary of the invention
In view of the existing problem of above-mentioned prior art scheme, the method that provides a kind of professional route to return is provided the object of the invention, when situation at random appears in the professional route after heavy-route takes place, can realize automatically that under the prerequisite that does not influence the legacy network resource utilization professional route is back to primary routing, this method can obviously reduce network operation maintenance cost, reduce the difficulty and the risk that expand volume of business, and alleviate manually-operated workload and increase work efficiency.
In order to achieve the above object, technical scheme of the present invention is achieved in that
The method that a kind of professional route is returned, this method comprises the steps:
A, professional source node network element or the current route of webmaster are set to primary routing, and preserve primary routing information;
B, when detecting current route and break down, described source node network element is initiated heavy-route and is also connected, and current route is switched to restoration route from described primary routing, and discharge the primary routing resource;
C, treat described primary routing fault recovery after, described source node network element connects after reading described primary routing information, and current route is switched back described primary routing from described restoration route.
Described current route is set to primary routing and specifically comprises: the source node network element of business or webmaster initiate to set up LSP and the initial route that generates is set to primary routing; The restoration route that generates after the perhaps professional heavy-route is set to primary routing.
The A step further comprises: described primary routing information is optimized operation, is converted into route restriction information, and be kept on described service source node network element or the webmaster.
The A step also further comprises: the mode with prefabricated route is kept at described primary routing information on described service source node network element or the webmaster.
The C step further comprises: treat that described source node network element reads in the process that connects after the described primary routing information, business is optimized operation, and selects professional route to return strategy according to user's request, make professional route be adjusted back described primary routing.
Described professional route is returned strategy and comprised: professional route is set to timeslot-level return or the optical fiber level is returned.
This method further comprises: webmaster is done the current business route and is returned collision detection, returns conflict if exist, and then the time slot of current business route setting is returned to be adjusted into the optical fiber level and to return.
The C step further comprises:
If described current business routing switch success is then write down current operating result, and is discharged current route resource;
If described current business routing switch failure is then write down current operating result, and selected different iterative manner and/or select described professional route to return strategy according to user's request, realize described primary routing is returned in current failure business reorganization.
Described operating result comprises that being operable to exploit is engaged in tabulating and the operation failure service lists; After treating that each time route return finishes, generating run success business information and/or operation failure business information in corresponding lists automatically, and preserve.
Described iterative manner comprises: by manual mode or automated manner or craft and the mode that combines automatically, over and over again described primary routing is returned in current failure business reorganization.
Return for current failure business, select the failure business in the described operating result, repeat return one by one by webmaster or network element, until finishing returning of professional route with craft or automatic Iterative mode.
Adopting before the automatic Iterative mode carries out route return, maximum automatic Iterative number of times and automatic Iterative success threshold value is set respectively, when the quantity of returning when professional route reaches described automatic Iterative success threshold value, then described automatic route return success.
Return for current failure business, select the failure business in the described operating result, adopt by hand and repeat return one by one with the iterative manner that combines automatically, required number of services of returning and successful threshold value are set respectively, when with manual iterative manner during according to set number of services complete operation, if the success rate that route is returned is higher than described successful threshold value, then carry out the return of follow-up business route with manual iterative manner, if the success rate that route is returned is lower than described successful threshold value, then change the return that the automatic Iterative mode is carried out the follow-up business route automatically over to.
The beneficial effect of technical solution of the present invention is as follows:
Compare with the prior art scheme, by adopting the optimization of primary routing information is converted into the mode of route restriction information or preserves primary routing information in the mode of prefabricated route, wait to take place to discharge the primary routing resource after the professional heavy-route, then utilize method of the present invention can guarantee under the prerequisite that does not influence the legacy network resource utilization, to realize automatically that professional route is back to primary routing, it not only reduces whole network operation maintenance cost, and reduces difficulty and the risk that expands volume of business in limited Internet resources; In addition, be set to the optical fiber level by professional route and return, and adopt different iterative manner, can alleviate manually-operated workload effectively and increase work efficiency, to overcome the massive losses that causes because of misoperation according to actual conditions.
Description of drawings
Fig. 1 returns the primary routing flow chart automatically for the professional route of the present invention;
Fig. 2 returns the conflict schematic diagram for the professional route of the present invention;
Fig. 3 returns the primary routing flow chart for the present invention's business of failing.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Main thought of the present invention is: professional source node network element or the current route of webmaster are set to primary routing, by adopting the optimization of primary routing information are converted into the mode of route restriction information or preserve primary routing information in the mode of prefabricated route; When network breaks down, professional source node network element is initiated heavy-route and is also connected, and discharges the primary routing resource, and pending fault can return strategy according to professional route and make professional route return its primary routing automatically after recovering.Return for current failure business, can select different iterative manner and/or select described professional route to return the strategy realization.
Professional route is returned the two kinds of situations that are divided into: the professional route of wall scroll is returned with many professional routes and is returned.Many professional routes are returned and are comprised that the professional route of the whole network returns, and it is a kind of special circumstances that many professional routes are returned.Many professional routes are returned implementation method and mainly are: the user at first selects many professional routes (if number of services is excessive, it is professional then to divide batch to select) to return on webmaster, and every professional route is returned one by one in the mode of serial.In other words, to return be to carry out batch operation on the basis that the professional route of wall scroll is returned for many professional routes.
As shown in Figure 1, this figure is the flow chart that the professional route of realization is returned primary routing automatically.Comprise the steps:
Step S101: professional source node network element or the current route of webmaster are set to primary routing.
So-called current route can be initial route: promptly Ye Wu source node network element or webmaster are when setting up new IN service, set up LSP (Label Switch Path by the ASON signaling, label switched path), meanwhile, by Routing Protocol (for example, the CSPF agreement) calculates initial route, obtain initial routing iinformation.Current route also can be a restoration route: promptly when network breaks down, the professional connection interrupts, the service source node is according to the failure condition of network, (for example use Routing Protocol, the CSPF agreement) calculates a new route, initiate and finish the path of this route according to new routing information and set up, above-mentioned interrupting service is restored; Described new route is defined as restoration route.If current restoration route is reasonable, stable, then the user as required restoration route be set to primary routing.
Step S102: primary routing information is preserved.Can adopt the mode of prefabricated route that information is kept on network element or the webmaster; Also can change into route restriction information to primary routing by optimizational function earlier, again this information is kept on network element or the webmaster.
So-called prefabricated routing mode refers to, activate connect before, calculate earlier select to connect the path of process.And so-called route restriction information refers to according to different constraint policy selection paths, this information is by generally forming through (must pass through) information with without (not needing process) information, promptly in optimization primary routing information being appointed as must be through information, makes the professional route after the optimization be in real-time routing state.The difference of dual mode is: the former directly preserves clear and definite routing iinformation; The latter pre-determines earlier and the storing path selection strategy, just determines final path according to selected strategy when connecting.By record primary routing relevant information, guarantee after fault restoration, business to be switched back primary routing from restoration route.
Step S103: when professional source/destination node network element detects current route and breaks down, fault message is announced the source node network element, the source node network element is initiated heavy-route and is connected, and current route is switched to restoration route from primary routing, and initiate to discharge the primary routing resource.
Discharging the primary routing resource can issue connection dismounting order by webmaster, also can remove signaling by the triggering of source node network element and finish.Using RSVP in the detailed process comprises: as RSVP-TE agreement, CR-LDP agreement.
Step S104: after pending fault was repaired, service source node network element read the primary routing information of preserving in advance, sets up original connection according to this information.
In setting up the process of original connection, be optimized feature operation, can select professional route to return strategy according to user's request, and professional route is optimized.So-called professional route is returned strategy and is comprised that professional route is set to timeslot-level returning with the optical fiber level and returns.Here, timeslot-level returning refers to professional must returning according to set time slot; The optical fiber level is returned the finger business and be need not to return according to assigned timeslot, because a plurality of time slot services of bearing optical fiber can recoverable business can repeatedly select unappropriated time slot to return according to actual conditions.Generally speaking, professional route is set to timeslot-level returning.Because network constantly changes, operational primary routing resource may be taken by other business, and then in strict accordance with accurately returning for timeslot-level primary routing, its success rate is not high.Obviously, select the timeslot-level strategy that returns to determine the time slot that returns, so business is returned normal failure; Selecting the optical fiber level to return strategy does not need business to provide definite time slot; and in actual operation process; general all time interval resources used up on the optical fiber that do not exist; can leave 1/4 or 1/2 time slot as resource conservation; so the time interval resource of reserving on the optical fiber can be fully used, the primary routing of optical fiber level is back into power and increases substantially, and effectively reduces and returns conflict; for the consideration of operation maintenance, professional route often is adjusted into the optical fiber level and returns simultaneously.
Step S105: current route is switched back primary routing from restoration route, and discharge current route resource, realize that professional route returns primary routing automatically.
No matter be that wall scroll business or many business are carried out route and returned, the situation of failure all may occur returning automatically.Particularly when many business are returned, often occur: the success that business is returned must depend on the success that another business is returned.This situation is defined as returning conflict.As shown in Figure 2, this network is made up of NE1, NE2, NE3 and NE4 network element, and the business of NE1 to NE3 direction has professional 1 and professional 2: professional 1 primary routing is route 1, i.e. NE1-〉NE2-〉NE3, current route (restoration route) after its heavy-route be route 1 ', i.e. NE1-〉NE3; Professional 2 primary routing is route 2, i.e. NE1-〉NE3, the current route (restoration route) after its heavy-route be route 2 ', i.e. NE1-〉NE4-NE3.Obviously, the route 2 of professional 1 route 1 ' occupy professional 2 can occur, the route 2 when professional 2 ' switch loop leads to the failure because of route resource has been taken by professional 1 by 2 the time.Therefore, return conflict in order to reduce to produce, webmaster is done current route and is returned collision detection, returns conflict if exist, and then current route setting timeslot-level is returned to be adjusted into the optical fiber level and to return, and makes primary routing be back into power and obviously improves.
Based on the current business of returning failure, as shown in Figure 3, its implementation method of adjusting back primary routing is comprised the steps:
Step S201: current business is returned the primary routing failure, writes down current operating result.
Operating result comprises that being operable to exploit is engaged in tabulating and the operation failure service lists.If when the professional route of wall scroll was returned, the user selected current business to carry out primary routing return, when returning as if many professional routes, the user divides batch selection business to carry out corresponding operating.After route return finished each time, meeting is generating run success business information and/or operation failure business information in corresponding lists automatically, and this information is kept in the webmaster.
Step S202: select different iterative manner and/or select professional route to return strategy by user's request.
Step S203: according to the current failure business information in the operating result, select failure professional, finish the return of follow-up business route.
Iterative manner refers to, and repeats one by one professional route in the same manner and returns.This mode comprises three kinds: manual mode, automated manner, the craft and the mode that combines automatically.
Connecting when carrying out primary routing return, can select the optical fiber level to return strategy according to actual conditions.Because operator always reserves considerable resource and protects on optical fiber,, can adopt the method for iteration repeatedly to select unappropriated time slot to carry out route and return so return the business of failure for route.
(1) manual iterative manner
Because business reorganization is essential, the operation maintenance personnel often wish that energy is autonomous, manual mode is finished returning of professional route.Business for current inefficacy is returned, and reselects the failure business in the operating result, manually repeats return one by one by webmaster or network element, returns until finishing professional route.Return for many professional routes, the user returns after dividing batch selection business, all can provide after the operation each time and be operable to exploit affair tabulation and operation failure service lists.According to list information, retry failure at once is professional, retry again after perhaps doing it and optimizing and revising.
(2) automatic Iterative mode
Business for current inefficacy is returned, and reselects the failure business in the operating result, and webmaster or network element repeatedly repeat route return one by one automatically under automated manner, returns until finishing professional route.In order to prevent that program is absorbed in unlimited iteration, can before carrying out automatic route return, maximum iteration time and automatic Iterative success threshold value be set respectively.Whenever do iteration one time, counter adds one, stops iteration when arriving maximum iteration time.When if the quantity returned of professional route reaches set automatic Iterative success threshold value, route return success automatically; Return failure is not operated again.Such as, it is 1000 times that maximum iteration time is set, it is 98 (success rate is 98%) that automatic Iterative success threshold value is set, when returning number of services when too big, reach automatic Iterative success threshold value 98, then think the success of automatic route return, in order to avoid fall into the unsuccessful but situation of iteration always of a small amount of business (2%).
(3) craft and the iterative manner that combines automatically
Business for current inefficacy is returned, and reselects the failure business in the operating result, repeats route return.If it is big to return number of services, and iterations is excessive, program can be from the manual automated manner that changes over to.Before implementation and operation, each required number of services of returning and successful threshold value are set respectively.When with manual iterative manner during according to set number of services complete operation, if the success rate that route is returned is higher than described successful threshold value, then carry out the return of follow-up business route with manual iterative manner, if the success rate that route is returned is lower than described successful threshold value, then change the return that the automatic Iterative mode is carried out the follow-up business route over to.Such as, being provided with and finishing the required number of services of returning by manual iterative manner is 100, and successful threshold value is 80 (success rate is 80%), and the power that is back into behind end of operation is lower than 80%, then enters the automatic Iterative mode.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (13)
1, the method returned of a kind of professional route is characterized in that this method comprises the steps:
A, professional source node network element or the current route of webmaster are set to primary routing, and preserve primary routing information;
B, when detecting current route and break down, described source node network element is initiated heavy-route and is also connected, and current route is switched to restoration route from described primary routing, and discharge the primary routing resource;
C, treat described primary routing fault recovery after, described source node network element connects after reading described primary routing information, and current route is switched back described primary routing from described restoration route.
2, the method for returning according to the described professional route of claim 1 is characterized in that, described current route is set to primary routing and specifically comprises: the source node network element of business or webmaster initiate to set up LSP and the initial route that generates is set to primary routing; The restoration route that generates after the perhaps professional heavy-route is set to primary routing.
3, the method for returning according to the described professional route of claim 1 is characterized in that the A step further comprises: described primary routing information is optimized operation, is converted into route restriction information, and be kept on described service source node network element or the webmaster.
4, the method for returning according to the described professional route of claim 1 is characterized in that the A step also further comprises: the mode with prefabricated route is kept at described primary routing information on described service source node network element or the webmaster.
5, the method for returning according to the described professional route of claim 1, it is characterized in that, the C step further comprises: treat that described source node network element reads in the process that connects after the described primary routing information, business is optimized operation, and select professional route to return strategy according to user's request, make professional route be adjusted back described primary routing.
6, the method for returning according to the described professional route of claim 5 is characterized in that, described professional route is returned strategy and comprised: professional route is set to timeslot-level return or the optical fiber level is returned.
7, the method for returning according to the described professional route of claim 6, it is characterized in that, this method further comprises: webmaster is done the current business route and is returned collision detection, returns conflict if exist, and then the time slot of current business route setting is returned to be adjusted into the optical fiber level and to return.
8, the method for returning according to the described professional route of claim 1 is characterized in that the C step further comprises:
If described current business routing switch success is then write down current operating result, and is discharged current route resource;
If described current business routing switch failure is then write down current operating result, and selected different iterative manner and/or select described professional route to return strategy according to user's request, realize described primary routing is returned in current failure business reorganization.
9, the method returned of described according to Claim 8 professional route is characterized in that, described operating result comprises and is operable to exploit be engaged in tabulation and operation failure service lists; After treating that each time route return finishes, generating run success business information and/or operation failure business information in corresponding lists automatically, and preserve.
10, the method returned of described according to Claim 8 professional route, it is characterized in that, described iterative manner comprises: by manual mode or automated manner or craft and the mode that combines automatically, over and over again described primary routing is returned in current failure business reorganization.
11, the method for returning according to the described professional route of claim 10, it is characterized in that, return for current failure business, select the failure business in the described operating result, repeat return one by one with craft or automatic Iterative mode by webmaster or network element, until finishing returning of professional route.
12, the method for returning according to the described professional route of claim 11, it is characterized in that, before employing automatic Iterative mode is carried out route return, maximum automatic Iterative number of times and automatic Iterative success threshold value is set respectively, when the quantity of returning when professional route reaches described automatic Iterative success threshold value, then described automatic route return success.
13, the method of returning according to the described professional route of claim 10, it is characterized in that, return for current failure business, select the failure business in the described operating result, adopt by hand and repeat return one by one with the iterative manner that combines automatically, required number of services of returning and successful threshold value are set respectively, when with manual iterative manner during according to set number of services complete operation, if the success rate that route is returned is higher than described successful threshold value, then carry out the return of follow-up business route with manual iterative manner, if the success rate that route is returned is lower than described successful threshold value, then change the return that the automatic Iterative mode is carried out the follow-up business route automatically over to.
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