CN102811388B - The business answering method and device of automatically switching optical networks - Google Patents
The business answering method and device of automatically switching optical networks Download PDFInfo
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- CN102811388B CN102811388B CN201110148249.3A CN201110148249A CN102811388B CN 102811388 B CN102811388 B CN 102811388B CN 201110148249 A CN201110148249 A CN 201110148249A CN 102811388 B CN102811388 B CN 102811388B
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Abstract
The present invention provides the business answering method and device of a kind of automatically switching optical networks, this method includes：On a second path, from first node to end-node successively by business by the second path switching to first path, wherein the second path is the rerouting recovering path after first path breaks down；After the completion of switching, the second path is deleted.Through the invention, using former access is switched in being replied in business point by point, and control entire recovery process according to signaling, it solves after introducing Resources Sharing Mechanism, existing answering method cannot meet the problem of business reply requires, it ensures that under the scene of resource-sharing, the correctness that business is replied.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of automatically switching optical networks (Automatic Switched
Optical Network, abbreviation ASON) in business answering method.
Background technology
Automatically switching optical networks (ASON) is to assign optical-fiber network intelligence by the protocol means automatically controlled in area of light increase
Attribute completes signal routing function to realize the high-speed and protocol transparency of network by intelligent switching technology.Core equipment
Under the control of standard signaling, according to the demand and routing algorithm of different user, dynamically path end to end is established for user.
Further for the availability and stability for improving network, shielded LSP is route using automatic Recovery Technology
The predistribution for carrying out precomputation and resource ensures quickly to regain Internet resources in LSP Joint failures or after interrupting, makes original
It path can be with self-healing recovery.
And when former path fault disappears, since former access may be more excellent than the path after rerouting recovering, user it is expected
Business can be still carried on former access, proposes business answering method at this time.Reply request can by manually triggering,
Automatic trigger after can also being disappeared by alarm.In existing technology, answering method is after replying request triggering, and setting is certain
When device, original access fault-free is determined after timer expires, then first node carries out intersection switching action, while noticing periproct click-through
Row, which intersects, to be switched.After tail node switches successfully/failure, result will be switched and be reported to first node, first node is switched according to this point
As a result with tail node switch result judge to reply successfully/failure.
Existing answering method is to be based on such a premise, i.e., the path after former access and rerouting recovering is only in head and the tail
Node, which has, to cross, and therefore, existing answering method has the following problems：After introducing Resources Sharing Mechanism in network, in order to carry
High network bandwidth utilization factor calculates when routing when meet constraints (bandwidth, hierarchical resource) shortest path, needs to consider
Bandwidth resources are shared as possible, can be shared with other connection resources when to establish connection, make full use of resource.In this machine
Under system, the path after former access and rerouting recovering may share certain section of link circuit resource, lead to two paths so not only
Have in head and the tail node and cross, may also cross in other nodes, in this case, only head and the tail node intersection is switched and cannot be expired
The requirement replied enough.
Invention content
The main purpose of the present invention is to provide the business answering methods and device of a kind of automatically switching optical networks, at least
It solves the problem of after above-mentioned introducing Resources Sharing Mechanism that existing answering method cannot meet reply to require.
According to an aspect of the invention, there is provided a kind of business answering method of automatically switching optical networks, including：
On two paths, from first node to end-node successively by business by the second path switching to first path, wherein the second path is the
Rerouting recovering path after one path fails；After the completion of switching, the second path is deleted.
Preferably, before from first node to end-node successively by business by the second path switching to first path, further include：
Request is replied in first node triggering business, and is arranged one and replys timer；After replying timer expiration, detection first path is
It is no faulty.
Preferably, from first node to end-node successively by business by the second path switching to first path, including：First node
By business by the second path switching to first path, and switching request is forwarded to by downstream joint by signaling successively along the second path
Point；Downstream node is according to switching request successively by business by the second path switching to first path.
Preferably, downstream node according to switching request successively by business by the second path switching to first path, including：Under
Trip node is determined the need for business according to the signaling scene information carried in signaling by the second path switching to first path；
It is switched to first path if it is, being intersected business by the second path according to corresponding rule.
Preferably, business is intersected by the second path according to corresponding rule and is switched to before first path by downstream node,
Further include：Whether downstream node judges itself on the overlapping trees in first path and the second path；If it is, according to phase
The rule answered, which is intersected business by the second path, switches to first path.
Preferably, after the completion of switching, the second path is deleted, including：End-node is by the second path switching to first path
Afterwards, the second path is deleted, and removal request is forwarded to by upstream node by signaling successively along the second path；Upstream node according to
Removal request deletes the second path successively.
Preferably, upstream node deletes the second path according to removal request successively, including：Upstream node is taken according in signaling
The signaling scene information of band determines the need for deleting the second path；Believe if it is, deleting the label in the second path and intersecting
Breath.
According to another aspect of the present invention, a kind of business return mechanism of automatically switching optical networks is provided, including：It switches
Module, on a second path, from first node to end-node successively by business by the second path switching to first path,
In, the second path is the rerouting recovering path after first path breaks down；Removing module, for after the completion of switching, deleting
Except the second path.
Preferably, switching module includes：First switches submodule, in first node by business by the second path switching extremely
First path, and switching request is forwarded to by downstream node by signaling successively along the second path；Second switches submodule, is used for
In downstream node according to switching request successively by business by the second path switching to first path.
Preferably, removing module includes：First deletes submodule, is used in end-node by the second path switching to the first via
After diameter, removal request is forwarded to upstream node successively along the second path in the second path of end-node, and by signaling；Second deletes
Except submodule, for deleting the second path successively according to removal request in upstream node.
Through the invention, it using former access is switched in being replied in business point by point, solves after introducing Resources Sharing Mechanism,
Existing answering method cannot meet the problem of business reply requires, and ensure that under the scene of resource-sharing, and business is returned
Multiple correctness.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is according to embodiments of the present invention one business answering method flow chart；
Fig. 2 is according to embodiments of the present invention two business answering method flow chart；
Fig. 3 is according to embodiments of the present invention three business rerouting recovering rear path schematic diagram；
Fig. 4 is according to embodiments of the present invention three service bearer path schematic diagram after being switched to former access；
Fig. 5 is according to embodiments of the present invention four business return mechanism structural schematic diagram；
Fig. 6 is according to embodiments of the present invention five business return mechanism structural schematic diagram.
Specific implementation mode
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
Embodiment one
Fig. 1 is according to embodiments of the present invention one business answering method flow chart, as shown in Figure 1, including the following steps：
Step S102, on a second path, from first node to end-node successively by business by the second path switching to first
Path, wherein the second path is the rerouting recovering path after first path breaks down.
Step S104 deletes the second path after the completion of switching.
In above-described embodiment one, by the way that node to be switched to former access point by point, solves in automatically switching optical networks and draw
After entering Resources Sharing Mechanism, existing answering method cannot meet the problem of business reply requires, and ensure that total in resource
Under the scene enjoyed, the correctness of business reply.
Further include step before above-mentioned steps S102：Request is replied in the first node triggering business for waiting for reply business, this
Request can be by manually triggering, or automatic trigger after former access (i.e. first path) failure vanishes of business.Request triggering
Afterwards, timer is replied in setting one.Whether after replying timer expiration, then to detect former access faulty, continues if fault-free
Switching operation in step S102；Otherwise Recovery Process stops.
In step s 102, after first node is switched, switching request need to be sent to next section by standard signaling
Point, other nodes receive the standard signaling of upstream node, obtain the signaling scene information carried in the standard signaling to confirm
Whether need to switch, in the case where needing to switch, carries out intersecting to change to be equipped with switching to former access according to corresponding rule.Step
Make service bearer on former access after the completion of S102.
In step S104, after end-node is switched to former access, need to delete rerouting recovering path (the second tunnel at this time
Diameter).First, minor details point deletion rerouting recovering path respective labels and intersection information, and signaling will be deleted and be back to upstream section
Point, other nodes receive the standard signaling of downstream node, are confirmed whether according to the signaling scene information carried in the standard signaling
It needs to delete rerouting recovering path, if it is, according to the corresponding regular deletion into row label and intersection.
Embodiment two
Fig. 2 is according to embodiments of the present invention two business answering method sequence diagram, as shown in Fig. 2, including the following steps：
Request is replied in step S202, triggering, this request can be by manually triggering, or when the former path fault of business disappears
Automatic trigger afterwards.
Step S204 starts timer, and whether the former access of detection is faulty after timer expiry, in former access fault-free
In the case of execute step S206；Otherwise stop recovery process.
Step S206, first node are switched to former access, and start standard signaling and send switch messages to intermediate node,
In, it is carried in standard signaling and switches scene information.Intermediate node refers to removing the other of head and the tail node on rerouting recovering path
Node.
Step S208, intermediate node receive standard signaling, switch to former access.
Step S210, tail node are switched according to the standard signaling received to former access.
Step S212, periproct point deletion rerouting recovering path, and switch messages are sent to middle node by standard signaling
Point, wherein carried in standard signaling and delete scene information.
Step S214, intermediate node receive standard signaling, delete rerouting recovering path.
Step S216, first node answering service are replied successfully.
Embodiment three
In the present embodiment, it is described in detail and is controlled using signaling, original is switched to point by point from rerouting recovering path
The process of access.
Fig. 3 is according to embodiments of the present invention three business recovery rear path schematic diagram, as shown in figure 3, former access (A-C-D)
Including three nodes：A, C, D, wherein A is first node, and D is tail node, and there are failures at A-C sections.Rerouting recovering road
Diameter (A-B-C-D) includes four nodes：A、B、C、D.Rerouting recovering path is with former access in C-D sections of resource-sharings.Because thus
When A-C sections there are failure, therefore service bearer on rerouting recovering path, i.e., in intersection's A, C, D node, business is from weight
On route recovery path collect mail number, rather than from former access collect mail number.
Fig. 4 is according to embodiments of the present invention three service bearer path schematic diagram after being switched to former access.As shown in figure 4,
If the A-C segment faults of former access disappear, trigger business in first node A and reply request, this request can by manually triggering, or
Automatic trigger after former path fault disappears, first node A receive setting one after business replys request and reply timer, timing herein
After device expires, detecting the former access of business, whether failure has disappeared, if confirming, A-C segment faults have disappeared, and business is replied,
It is switched to former access.Specific reversed process is as follows：
After first node A is switched to former access, the request for being switched to former access is sent to downstream node by signaling, that is, is believed
It enables and switching request is sent to each downstream node on restoration path, downstream node B, C, D are switched to after receiving signaling
The operation of former access.Intersecting the rule switched is, just needs to do corresponding switching operation if former access and restoration path are shared, if not
It is shared, then intersect without action.
When signaling reaches B node, since former access is without B node, so intersecting without action, signaling continues down
You Chuan；When signaling reach C nodes when, since former access and restoration path have shared C-D section, thus carry out intersection switch it is dynamic
Make；The operation of D node switches is identical as C nodes.
After tail node D receives the signaling of switching request and is switched to former access, need to delete rerouting recovering road at this time
Diameter.I.e. D nodes will receive deletion signaling first, and then D nodes will delete signaling along rerouting recovering path toward passback, that is, delete
Signaling passes to C nodes from D nodes, after C nodes receive deletion signaling, carries out deleting rerouting recovering path respective labels and intersection
Then the operation of information will delete signaling and pass to B node；Processing after B node is similar to C nodes.
In above-mentioned Recovery Process, since business has been carried on after the completion of switching step on former access, so deleting
Restoration path is the hit that will not cause business.
After deleting rerouting recovering path by deletion signaling, business has been returned on former access at this time, entire to return
Multiple process is completed.
Example IV
Fig. 5 is according to embodiments of the present invention four business return mechanism structural schematic diagram, as shown in figure 5, the business is replied
Device includes：Switch module 10 and removing module 20.
Wherein, it switches module 10 with removing module 20 to be connected, switches module 10, on a second path, being saved from head
Point is to end-node successively by business by the second path switching to first path, wherein breaks down for first path in the second path
Rerouting recovering path afterwards.Removing module 20, for after the completion of switching, deleting the second path.
In the present embodiment, node is switched to 20 counterweight road of former access and removing module point by point by switching module 10
By the deletion of restoration path, solve after introducing Resources Sharing Mechanism in automatically switching optical networks, existing answering method cannot
Meet the problem of business reply requires, ensures that under the scene of resource-sharing, the correctness that business is replied.
Embodiment five
Fig. 6 is according to embodiments of the present invention five business return mechanism structural schematic diagram.As shown in fig. 6, the present embodiment packet
Include each function module in example IV.
Wherein, it switches module 10 and switches submodule 11 and second including first and switch submodule 12.First switches submodule
11, in first node by business by the second path switching to first path, and by signaling by switching request along the second path
It is forwarded to downstream node successively；Second switches submodule 12, in downstream node according to switching request successively by business by the
Two path switchings are to first path.
Wherein, removing module 20 includes that the first deletion submodule 20 and second deletes submodule 22.First deletes submodule
21, for after end-node is by the second path switching to first path, deletion to be asked in the second path of end-node, and by signaling
It asks and is forwarded to upstream node successively along the second path；Second delete submodule 22, for upstream node according to removal request according to
The second path of secondary deletion.
In existing technology, automatically switching optical networks is to be based on Universal Multiprotocol Label Switching (GMPLS：
Generalized Multi-Protocol Label Switching) protocol architecture, and using traffic engineering (TE：Traffic
Engineering) tactful.GMPLS protocol architectures include signaling protocol (RSVP-TE/CR-LDP), Routing Protocol (OSPF), chain
Road management agreement (LMP) etc..The foundation of business is to control to complete whole flow process based on signaling protocol (RSVP-TE/CR-LDP).
In order to solve the problems, such as that the recovery process of current business exists, used based on signaling protocol in the above embodiment of the present invention
Business answering method, it can be seen from the above description that the present invention realizes following technique effect：
First, standard signaling is made full use of to control entire recovery process, it is ensured that and connection is finally carried on original route,
Rerouting recovering path is deleted.Even if there is some node switching step failure, final result will not be influenced.Second,
For (resource-sharing, association etc.) under different scenes, this Recovery Process is all a general process, is not constrained by scene.
Third, this scheme have been also compatible with optimization process, i.e., when user needs service switching to more preferably or on path in need,
Equally ensure that business is finally carried on path optimizing using this technical solution, former access is deleted.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be with different from shown in sequence execution herein
The step of going out or describing, either they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of business answering method of automatically switching optical networks, which is characterized in that including：
On a second path, it is point-by-point from first node to end-node by business by second path switching to first path,
In, second path is the rerouting recovering path after the first path breaks down；
After the completion of described switch, second path is deleted.
2. according to the method described in claim 1, it is characterized in that, it is point-by-point from first node to end-node by business by described the
Before two path switchings to first path, further include：
Request is replied in first node triggering business, and is arranged one and replys timer；
After the reply timer expiration, whether faulty the first path is detected.
3. method according to claim 1 or 2, which is characterized in that it is point-by-point from first node to end-node by business by institute
The second path switching is stated to first path, including：
The first node by business by second path switching to the first path, and by signaling by switching request along institute
State the second path it is point-by-point be forwarded to downstream node；
The downstream node according to the switching request it is point-by-point by business by second path switching to the first path.
4. according to the method described in claim 3, it is characterized in that, the downstream node is incited somebody to action according to the switching request is point-by-point
Business by second path switching to the first path, including：
The downstream node is determined the need for business according to the signaling scene information carried in the signaling by described second
Path switching is to the first path；
It is switched to the first path if it is, being intersected business by second path according to corresponding rule.
5. according to the method described in claim 4, it is characterized in that, the downstream node according to corresponding rule by business by institute
It states the second path intersection to switch to before the first path, further includes：
Whether the downstream node judges itself on the overlapping trees in the first path and second path；
It is switched to the first path if it is, being intersected business by second path according to corresponding rule.
6. method according to claim 1 or 2, which is characterized in that after the completion of described switch, delete second tunnel
Diameter, including：
After the end-node is by second path switching to the first path, second path is deleted, and pass through signaling
Removal request is forwarded to upstream node successively along second path；
The upstream node deletes second path successively according to the removal request.
7. according to the method described in claim 6, it is characterized in that, the upstream node is deleted successively according to the removal request
Second path, including：
The upstream node determines the need for deleting second path according to the signaling scene information carried in the signaling；
If it is, deleting the label and intersection information in second path.
8. a kind of business return mechanism of automatically switching optical networks, which is characterized in that including：
Switch module, on a second path, it is point-by-point from first node to end-node by business by second path switching
To first path, wherein second path is the rerouting recovering path after the first path breaks down；
Removing module, for after the completion of described switch, deleting second path.
9. device according to claim 8, the module of switching include：
First switches submodule, in the first node by business by second path switching to the first path, and
By signaling by switching request along second path it is point-by-point be forwarded to downstream node；
Second switches submodule, for the downstream node according to the switching request it is point-by-point by business by second tunnel
Diameter is switched to the first path.
10. device according to claim 8 or claim 9, the removing module include：
First deletes submodule, is used for after the end-node is by second path switching to the first path, described
Second path described in end-node, and removal request is forwarded to by upstream node by signaling successively along second path；
Second deletes submodule, for deleting second path successively according to the removal request in the upstream node.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1527507A (en) * | 2003-03-04 | 2004-09-08 | 华为技术有限公司 | Service link protecting method for intelligent optical network |
| CN1983960A (en) * | 2006-05-15 | 2007-06-20 | 华为技术有限公司 | Method for returning service route |
| CN101958809A (en) * | 2010-10-20 | 2011-01-26 | 烽火通信科技股份有限公司 | Method for realizing shared recovery in ASON (Automatic Switch Optical Network) network based on packet switching |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1527507A (en) * | 2003-03-04 | 2004-09-08 | 华为技术有限公司 | Service link protecting method for intelligent optical network |
| CN1983960A (en) * | 2006-05-15 | 2007-06-20 | 华为技术有限公司 | Method for returning service route |
| CN101958809A (en) * | 2010-10-20 | 2011-01-26 | 烽火通信科技股份有限公司 | Method for realizing shared recovery in ASON (Automatic Switch Optical Network) network based on packet switching |
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