CN1710869A - Method for realizing connected reinforced main-apparatus protection in automatic exchange optical network - Google Patents
Method for realizing connected reinforced main-apparatus protection in automatic exchange optical network Download PDFInfo
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Abstract
Under control plane of automatic exchange optical network participates in, the method realizes enhanced type dynamic 1+1 protection for connection. i.e. combination of protection and dynamic recovery. The invention provides 1+1 protection at any place and any time for service in high service quality. Main steps are as following: when working route is disabled, and protecting route is normal, service is rearranged to protecting route; after protecting route for current working route is built, working route gone wrong is treated; when protecting route is disabled, and working route is normal, keeping present status of transferring service in current working route; recalculating and building protecting route of working route; then treating protecting route gone wrong; when two routes are disabled at sane time, ASON control plane recalculates and rebuilds both routes; after rearranging service to new working route, the invention treats original working route and protecting route.
Description
Technical field
The present invention relates to the implementation method that a kind of protection that connects recovers in optical communication network; exactly; relate to the implementation method that a kind of enhancement mode 1+1 main-apparatus protection that connects recovers in ASON, belong to the 1+1 main-apparatus protection technical field in the optical communication network.
Background technology
Along with developing rapidly of Network, people are to the various demands for higher performance of optical communication network: the structure of wishing network is more flexible, Network Management is unified flexibly, bandwidth has higher utilance, higher survivability and better extensibility, the business that dynamic connection can be provided and support effectively to face the future is so ASON ASON arises at the historic moment.
Conventional optical network has only the plane of transmission and management plane, and ASON is then formed by transmitting plane, management plane and control plane, and having control plane is the key point that ASON is different from conventional optical network.Introducing by control plane, in conjunction with networking mode flexibly, ASON can be realized the co-ordination between service network and the transmission net, make optical transport network begin progressively to change into the role that end-to-end connection is provided from the role that capacity only is provided, and finally under the environment of multi-vendor, multi-operator, realize the interoperability of network, simultaneously for the client provides more new business type, for operator provides new business model.
Traditional 1+1 primary channel protection is a kind of based on the static 1+1 protection technology that transmits the plane in the optical-fiber network.It is to adopt needs 1+1 protected business is set up operating path and protection path simultaneously, to service implementation " dual transmitting and receiving " strategy; When network broke down, mutual certain automatic protection switching message realized two-way the switching that connect between Ingress node that protection is switched and Egress node.Following mask body is introduced the work of its two paths when each different situation and is switched situation.
Referring to Fig. 1; this figure has specifically described the signal when working properly at operating path A (representing with thick line) and protection path B (representing with fine rule) of traditional 1+1 primary channel resist technology; promptly two paths while transport service receives service signal from operating path.
Referring to Fig. 2, when network failure (dotting) takes place operating path A, and during the B operate as normal of protection path, switching operation takes place; This switching operation takes place to influence less than the hit of 50ms to the communication service meeting of transmitting, and receives service signal from protection path B (representing with thick line) then.At this moment, operating path originally is not removed, and after fault restoration, can implement return, perhaps original operating path is become the protection path.
Referring to Fig. 3, as operating path A (representing with thick line) working properly, and switching operation does not take place when breaking down (dotting) this moment in protection path B, and the business that is transmitting is not exerted an influence, and does not delete the protection path of breaking down yet.As long as after this fault in time repaired, this path is still as the protection path.
Referring to Fig. 4, when operating path A breaks down with protection path B simultaneously (both dots), service disconnection.This two paths is all not deleted, but the eliminating earlier of the fault of which paths, just from this path transport service signal.If operating path is repaired at last, can implement return, perhaps original operating path becomes the protection path.
Therefore; traditional 1+1 primary channel protection is a kind of based on the static 1+1 protection technology that transmits the plane; can only resist an operating path or protection path among the path network failure takes place; when (comprising and successively losing efficacy or inefficacy simultaneously) if all lost efficacy at operating path and protection path, business is interrupted.There is the communication service of specific (special) requirements to be not only a shortcoming for some to QoS, also will manages to avoid as far as possible.
Summary of the invention
In view of this; the implementation method that the purpose of this invention is to provide a kind of enhancement mode 1+1 main-apparatus protection that in ASON, connects; this method can provide the dynamic 1+1 protection of enhancement mode to recover for the business of high quality-of-service, makes that this business can be at the path protection that almost obtains 1+1 in any time.
In order to achieve the above object, the invention provides a kind of enhancement mode 1+1 protected implementation method that in ASON, connects, it is characterized in that: under the control plane of ASON ASON participates in, realize the dynamic 1+1 main-apparatus protection of enhancement mode to connecting, be about to protection and dynamically recover combine, for the business of high quality-of-service provides 1+1 main-apparatus protection anywhere or anytime; At least comprise following operating procedure:
(1) source node is that the selection route is calculated in original 1+1 operating path and protection path respectively;
(2) send the signaling of setting up operating path and the signaling of setting up the protection path respectively by the source node control plane, set up operating path and protection path; And " dual transmitting and receiving " mode of employing, while transport service on operating path and protection path;
(3) in the process of transport service, respectively operating path and protection path are carried out fault detect by downstream node; If the generation network failure then according to failure cause, selects to carry out following subsequent operation respectively;
(4) when operating path lost efficacy and the protection path just often, the business that transmits is switched to the protection path from operating path, simultaneously with network failure notification source node, recomputate and set up the protection path in work at present path by source node, then the operating path that breaks down is handled;
(5) operating path just often keeps current present situation by the operating path transport service when protecting path failure; But, with network failure notification source node, recomputate and set up the protection path in work at present path by source node, then the protection path of breaking down is handled;
(6) when operating path lost efficacy simultaneously with the protection path; the ASON control plane is with network failure notification source node; adopt dynamic Restoration Mechanism to recomputate and set up operating path and protection path by source node; and after switching the business to new operating path, the former operating path and the former protection path of breaking down are handled.
Described method further comprises the steps:
(7) based on the consideration of management, operating path and/or protection path are optimized.
Processing mode to the operating path that breaks down in described step (4) or (6) has two kinds: keep or deletion.
Processing mode to the protection path of breaking down in described step (5) or (6) has two kinds: keep or deletion.
If operating path that breaks down or protection path are initial operating path or protection paths, can take the reservation mode, the purpose of reservation is after fixing a breakdown, and business is turned back to this initial operating path, and continue to adopt initial protection path, to make things convenient for network management or operation; Otherwise, operating path that deletion is broken down or protection path.
The operation in the deletion path in described step (4) or (5) or (6) must be after new associated pathway is successfully set up.
The present invention is a kind of implementation method of connection being carried out the recovery of 1+1 main-apparatus protection in ASON; its innovation part technically is: by the participation of ASON control plane; the mechanism that adopts protection and dynamically recover to combine is for the business of high quality-of-service is almost all providing 1+1 protection in any time.And for the convenience of network operation and management, after fault restoration, business can be returned initial work/protection path.
The present invention with the advantage that existing 1+1 main-apparatus protection technology is compared is: the situation that traditional 1+1 main-apparatus protection can not effectively be resisted operating path and protect the path all to lose efficacy, in case two paths break down simultaneously, communication service will be interrupted.And the present invention can be the business realizing 1+1 protection in any time almost whenever and wherever possible; the fault that can resist operating path and protection path difference or lose efficacy simultaneously; even they both when breaking down simultaneously, also can adopt dynamic Restoration Mechanism in the short as far as possible time, to rebulid new connection in time.In addition, the present invention need not artificial participation, is finished automatically by the ASON control plane, and when therefore breaking down, the professional impaired time is very short.Therefore, adopt the service quality of the business that the present invention can provide to the user to reach top level, when network failure takes place,, help operator to implement the price d8fferentitation strategy, even introduce new business model the minimum that influences of business.
Description of drawings
Fig. 1 be traditional 1+1 main-apparatus protection technology in operating path and protection path professional transmission status schematic diagram during operate as normal all.
Fig. 2 is that traditional 1+1 main-apparatus protection technology lost efficacy at operating path, the professional transmission status schematic diagram when protecting the path operate as normal.
Fig. 3 is the traditional professional transmission status schematic diagram of 1+1 main-apparatus protection technology when operating path operate as normal, protection path failure.
Fig. 4 is the traditional professional transmission status schematic block diagram of 1+1 main-apparatus protection technology when operating path all lost efficacy with the protection path.
Fig. 5 is the operating process block diagram of the implementation method of 1+1 main-apparatus protection of the present invention.
Fig. 6 be the implementation method of 1+1 main-apparatus protection of the present invention in operating path and protection path professional transmission status schematic diagrames during operate as normal all.
Fig. 7 is that the implementation method of 1+1 main-apparatus protection of the present invention lost efficacy at operating path, the professional transmission status schematic diagram when protecting the path operate as normal.
Fig. 8 is the professional transmission status schematic diagram of implementation method when operating path operate as normal, protection path failure of 1+1 main-apparatus protection of the present invention.
Fig. 9 is the professional transmission status schematic diagram of implementation method when operating path all lost efficacy with the protection path of 1+1 main-apparatus protection of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 5～Fig. 9, introduce the implementation method that 1+1 protection that the present invention connects recovers in ASON, it is in the presence of ASON control plane, realizes that to connecting the dynamic 1+1 protection of enhancement mode recovers; Promptly by protection and the combination that dynamically recovers, for the business of high quality-of-service is almost providing 1+1 main-apparatus protection anywhere or anytime in any time.Its operating procedure (referring to Fig. 5) as described below:
(1) source node is that the selection route is calculated in original 1+1 operating path and protection path respectively.
(2) send the signaling of setting up operating path A and the signaling of setting up protection path B respectively by the source node control plane, set up operating path A and protection path B; And " dual transmitting and receiving " mode of employing, while transport service on operating path A and protection path B; The enhancement mode 1+1 protection restoration methods of the present invention of this moment as shown in Figure 6, " dual transmitting and receiving " mode when belonging to operate as normal, simultaneously business transferring on two paths.
(3) in the process of transport service, respectively operating path and protection path are carried out fault detect by downstream node; If the generation network failure then according to failure cause, selects to carry out following subsequent operation respectively.
(4) when operating path A generation network failure; but protection path B just often; when the business that transmits is switched to protection path B from operating path A; the ASON control plane is also with network failure notification source node; by source node is that current operating path B recomputates and set up a protection path C (referring to shown in Figure 7), guarantees that this business still has normal operating path B and protection path C simultaneously.Handle former operating path A then: if the operating path A that breaks down is original operating path, can keep, the purpose of reservation is after fixing a breakdown, recover normally, business is returned initial operating path A, to make things convenient for network management or operation; Otherwise, delete this former operating path A.After deletion action must successfully be set up at newly-built operating path C.
(5) when protection path B break down lost efficacy and operating path A just often, switching operation does not take place, keep current present situation by operating path A transport service; But the ASON control plane is the current newly-built protection path C (referring to shown in Figure 8) of operating path A with network failure notification source node by source node, and the assurance business still has normal operating path A and protection path C simultaneously.After new protection path C successfully sets up, handle protection path B again: if the protection path B that breaks down is original protection path, can keep, the purpose of reservation is after fixing a breakdown, recover normally, to continue to use protection path B, to make things convenient for network management or operation; Otherwise, deletion protection path B.After deletion action must successfully be set up at newly-built protection path C.
(6) when operating path A lost efficacy with protecting path B simultaneously network failure to take place; the ASON control plane is with network failure notification source node; adopt dynamic Restoration Mechanism to recomputate and set up operating path C and protection path D (referring to shown in Figure 9) by source node, guarantee professional in the short as far as possible time, continue to have normal operating path C and protection path D.Then, former operating path A and former protection path B are handled: if the operating path A that breaks down is original operating path, can keep, the purpose of reservation is after fixing a breakdown, recover normally, and business is returned initial operating path A; Otherwise, deletion operating path A.Equally, if the protection path B that breaks down is original protection path, also can keep.The purpose that keeps is after fixing a breakdown, recover normally, will continue to use protection path B, to make things convenient for network management or operation; Otherwise, deletion protection path B.Deletion action must be after newly-built path be successfully set up.
(7) based on the consideration of management, operating path and/or protection path are optimized.
Claims (6)
1, a kind of implementation method of the enhancement mode 1+1 main-apparatus protection that in ASON, connects, it is characterized in that: under the control plane of ASON ASON participates in, realize the dynamic 1+1 protection of enhancement mode to connecting, be about to protection and dynamically recover combine, for the business of high quality-of-service provides 1+1 protection anywhere or anytime; At least comprise following operating procedure:
(1) source node is that the selection route is calculated in original 1+1 operating path and protection path respectively;
(2) send the signaling of setting up operating path and the signaling of setting up the protection path respectively by the source node control plane, set up operating path and protection path; And " dual transmitting and receiving " mode of employing, while transport service on operating path and protection path;
(3) in the process of transport service, respectively operating path and protection path are carried out fault detect by downstream node; If the generation network failure then according to failure cause, selects to carry out following subsequent operation respectively;
(4) when operating path lost efficacy and the protection path just often, the business that transmits is switched to the protection path from operating path, simultaneously with network failure notification source node, recomputate and set up the protection path in work at present path by source node, then the operating path that breaks down is handled;
(5) operating path just often keeps current present situation by the operating path transport service when protecting path failure; But, with network failure notification source node, recomputate and set up the protection path in work at present path by source node, then the protection path of breaking down is handled;
(6) when operating path lost efficacy simultaneously with the protection path; the ASON control plane is with network failure notification source node; adopt dynamic Restoration Mechanism to recomputate and set up operating path and protection path by source node; and after switching the business to new operating path, the former operating path and the former protection path of breaking down are handled.
2, the implementation method of enhancement mode 1+1 main-apparatus protection according to claim 1 is characterized in that: described method further comprises the steps:
(7) based on the consideration of management, operating path and/or protection path are optimized.
3, the implementation method of enhancement mode 1+1 main-apparatus protection according to claim 1 is characterized in that: the processing mode to the operating path that breaks down in described step (4) or (6) has two kinds: keep or deletion.
4, the implementation method of enhancement mode 1+1 main-apparatus protection according to claim 1 is characterized in that: the processing mode to the protection path of breaking down in described step (5) or (6) has two kinds: keep or deletion.
5, according to the implementation method of claim 3 or 4 described enhancement mode 1+1 main-apparatus protections, it is characterized in that: if operating path that breaks down or protection path are initial operating path or protection paths, can take the reservation mode, the purpose that keeps is after fixing a breakdown, business is turned back to this initial operating path, and continue to adopt initial protection path, to make things convenient for network management or operation; Otherwise, operating path that deletion is broken down or protection path.
6, according to claim 1 or 2 or 3 or the implementation method of 4 or 5 described enhancement mode 1+1 main-apparatus protections, it is characterized in that: the operation in the deletion path in described step (4) or (5) or (6) must be after new associated pathway is successfully set up.
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