CN101325456B - Method for processing degrade of TE link in an optical network - Google Patents
Method for processing degrade of TE link in an optical network Download PDFInfo
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- CN101325456B CN101325456B CN2008101426631A CN200810142663A CN101325456B CN 101325456 B CN101325456 B CN 101325456B CN 2008101426631 A CN2008101426631 A CN 2008101426631A CN 200810142663 A CN200810142663 A CN 200810142663A CN 101325456 B CN101325456 B CN 101325456B
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Abstract
The invention discloses a method in the optical network for processing the TE chain degrade, comprising: A. detecting the control channel on the two sides of the net element, and reporting the degraded TE chain degrading information to the control plane of the net element; B. announcing the route protocol module of the local net element of the degrading information of the TE chain by the control plane, and transmitting the flood information including the degrading information of the TE chain. According to the invention, through reporting the degrading information of the TE chain to the net element control plane, and feedbacking the state information of the TE chain in time to other net element by the protocol module, so that the TE chain which can not ensure the service grade not used when computing is ensured, thereby shortening the routine computation time.
Description
Technical field
The present invention relates to the ASON technology, particularly in optical-fiber network, handle the method for TE Link degradation.
Background technology
Along with the develop rapidly of the communication technology and the rapid increase of data service, adopt optical technology to expand the common recognition that the core transport network capacity has become operator and equipment vendor.And be today of explosive increase in information capacity requirements, and ASON relies on it can carry out the dynamic assignment Internet resources, and high data volume transmission and do characteristics such as cost performance becomes an important communication technology and is widely used.
Fig. 1 is the typical module structure of the control plane of a network element in the ASON, and wherein, the control plane architecture mainly comprises signalling module, Routing Protocol module and connection management module etc.Wherein, signalling module is used to finish optical-fiber network and exchanges linkage function automatically, realizes end-to-end fast light path protection monitoring and recovery, sets up apace, removes and safeguard a light path across all-optical network; The connection management mould is used to be in charge of business and is connected, and control channel administers and maintains, transmits the Connectivity Verification of link and Fault Isolation/location etc.; The Routing Protocol module is used for the request according to the connection management module, calculates the optimum network route of professional process, and realizes the transmission of inundation information.
In the prior art, ASON is by general multiple protocols label exchange (Generalized Multiprotocol Label Switching to the foundation of business, being called for short " GMPLS ") signaling protocol controls and finishes, under the GMPLS protocol frame, the data link that has the same physical attribute between adjacent node can boundly be TE (the Traffic Engineering of a logic aspect, traffic engineering) link, TE Link has 4 kinds of state: Down, does not promptly have data link to distribute to TE Link; Init, promptly data link has been distributed to TE Link, but configuration information is also not synchronous with abutment points; Up, i.e. the normal operating conditions of TE Link, at least one master control passage can be used when sharing TE Link between node; Degraded, promptly all control channels all lost efficacy, but the data link that TE Link comprises distribute data flow all.LMP agreement (Link Manager Protocol, LMP Link Manager Protocol) is finished data link and is bound TE Link by mutual protocol massages on control channel, and verification TE Link attribute.When data link is bound TE Link, and after the verification of TE Link attribute passed through, this TE Link was a upstate, and can be flooded in the whole network by ospf protocol, is used for professional foundation for GMPLS.
Certain bar TE Link is in upstate, if all control channels that connect between the two ends network element of this TE Link all become unavailablely by available, then TE Link will be a degrading state by the upstate transition this moment.Describe according to RFC4204 chapters and sections 3.2.4.Degraded State (degrading state), when TE Link is in degrading state, use the business of this TE Link possibly can't guarantee the corresponding grade of service, will inevitably reduce professional service level like this.At the degrading state of TE Link, corresponding processing method is not provided in the existing technology, as seen, need further to improve prior art, in order to improve the countermeasure of various situations in the network.
Summary of the invention
The object of the present invention is to provide the method for handling the TE Link degradation in a kind of optical-fiber network, it has provided and has handled the specific implementation method of TE Link degradation, and makes network element in time to handle the degradation of link.
To achieve these goals, the present invention adopts following technical scheme:
The invention provides the method for handling the TE Link degradation in a kind of optical-fiber network, this method may further comprise the steps:
A, detect the control channel of network element both sides, and the TE Link degradation information of degradation is reported the control plane of this network element;
B, described control plane send the inundation information that contains described TE Link degradation information with the Routing Protocol module of this network element of degradation information announcement of described TE Link by the Routing Protocol module to other network elements; Wherein, further comprising the steps of between described steps A and the step B:
A1, search the label switched path that uses described flow engineering link; If do not find, execution in step B then; If find, execution in step A2 then;
The label switched path of the described flow engineering link that A2, basis find, the management plane under this network element control plane report about alarm or incident with this label switched path and described flow engineering link degradation information.
Described method, wherein, described steps A 2 may further comprise the steps:
Whether the first node of the label switched path that A21, judgement find is this network element;
If the first node of the label switched path that finds is this network element, then execution in step A22;
Connection management module in A22, this network element control plane is according to the grade of service of described label switched path, and the management plane under this network element control plane reports described alarm or incident.
Described method, wherein, described steps A 2 is further comprising the steps of:
A23, when the judged result of described steps A 21 is the first node of the label switched path that finds when being not this network element, then the connection management module of this network element passes to the degradation information of described label switched path information and described TE Link the first node network element of described label switched path;
The connection management module of A24, described first node network element is according to the grade of service of described label switched path, and the management plane under this network element control plane reports described alarm or incident.
Described method, wherein, the degradation information of described TE Link comprises: the chain line of TE Link, and the degrading state of TE Link.
Described method, wherein, described method is further comprising the steps of:
Other network elements receive described inundation information by network, resolve the degradation information that obtains described TE Link, and according to being used for the registration table that route is calculated in this degradation information updating self network element.
Described method, wherein, further comprising the steps of among the described step B:
The Routing Protocol module of this network element is according to the degradation information of described TE Link, upgrades in self network element to be used for the registration table that route is calculated.
Described method, wherein, described steps A may further comprise the steps: when the network element protocol stack detects that the last item control channel becomes down state by upstate between this network element and a network element node, the TE Link transition of all upstates that this network element protocol stack will link to each other with this network element node is a degrading state, and the degradation information of these TE Links is reported the control plane of this network element.
Beneficial effect: the present invention is by uploading the degradation information of TE Link to the network element control plane, and in time feed back the state information of TE Link to other network elements by the Routing Protocol module, so that when follow-up route is calculated, can guarantee not use the TE Link that can't guarantee the grade of service, thereby shortened the time that route is calculated.
Description of drawings
Fig. 1 is that the module on network element control plane in the prior art is formed schematic diagram;
Fig. 2 is the flow chart of the inventive method.
Embodiment
Handle the method for TE Link degradation in the optical-fiber network provided by the present invention, its core concept is at first, to detect the control channel of network element both sides, and the TE Link degradation information of degradation is reported the control plane of this network element; Then, control plane sends the inundation information that contains described TE Link degradation information with the Routing Protocol module of this network element of degradation information announcement of described TE Link by the Routing Protocol module to other network elements.In the said process, can also increase described control plane and handle the label switched path (Label Switched Path is called for short LSP, and is below unified with being called for short LSP) that uses this TE Link.
Describe technical scheme of the present invention in detail below with reference to accompanying drawing 2.
If do not find the LSP that uses this degradation TE Link, then execution in step 180;
If find the LSP that uses this degradation TE Link, then execution in step 140.
If the first node of the LSP that finds is this network element, then execution in step 150;
If the first node of the LSP that finds is other network elements, then execution in step 160.
Above-mentioned steps 120 to 170, the control plane of describing is handled the process of the LSP that uses this TE Link, in this process, the connection management module of control plane is according to the TE Link information that reports, search local all link informations, for the connection of using this TE Link, control plane need report management plane with link information and this TE Link information, so that how the management plane decision handles this connection.Need to prove that in order to respond the processing of follow-up management plane to this connection, control plane must keep the control authority to this connection, promptly control plane can not be handled this connection under the interference that does not have management plane.
In sum, when the present invention had provided in ASON the TE Link degradation, how control plane handled the business that can't guarantee the grade of service, and specific implementation method how to handle this TE Link of having demoted when route is calculated.It should be noted that; though above explanation of the present invention is carried out with reference to its specific embodiment; but those of ordinary skill in the art should be understood that; can carry out various changes to it in the form and details; improvement without departing from the spirit and scope of the present invention; all should belong to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (7)
1. handle the method that flow engineering link is demoted in an optical-fiber network, it is characterized in that, said method comprising the steps of:
A, detect the control channel of network element both sides, and the flow engineering link degradation information of degradation is reported the control plane of this network element;
B, described control plane send the inundation information that contains described flow engineering link degradation information with the Routing Protocol module of this network element of degradation information announcement of described flow engineering link by the Routing Protocol module to other network elements; Wherein, further comprising the steps of between described steps A and the step B:
A1, search the label switched path that uses described flow engineering link; If do not find, execution in step B then; If find, execution in step A2 then;
The label switched path of the described flow engineering link that A2, basis find, the management plane under this network element control plane report about alarm or incident with this label switched path and described flow engineering link degradation information.
2. method according to claim 1 is characterized in that, described steps A 2 may further comprise the steps:
Whether the first node of the label switched path that A21, judgement find is this network element;
If the first node of the label switched path that finds is this network element, then execution in step A22;
Connection management module in A22, this network element control plane is according to the grade of service of described label switched path, and the management plane under this network element control plane reports described alarm or incident.
3. method according to claim 2 is characterized in that, described steps A 2 is further comprising the steps of:
A23, when the judged result of described steps A 21 is the first node of the label switched path that finds when being not this network element, then the connection management module of this network element passes to the degradation information of described label switched path information and described flow engineering link the first node network element of described label switched path;
The connection management module of A24, described first node network element is according to the grade of service of described label switched path, and the management plane under this network element control plane reports described alarm or incident.
4. according to the described method of arbitrary claim in the claim 1 to 3, it is characterized in that the degradation information of described flow engineering link comprises: the chain line of flow engineering link, and the degrading state of flow engineering link.
5. according to the described method of arbitrary claim in the claim 1 to 3, it is characterized in that described method is further comprising the steps of:
Other network elements receive described inundation information by network, resolve the degradation information that obtains described flow engineering link, and according to being used for the registration table that route is calculated in this degradation information updating self network element.
6. according to the described method of arbitrary claim in the claim 1 to 3, it is characterized in that, further comprising the steps of among the described step B:
The Routing Protocol module of this network element is according to the degradation information of described flow engineering link, upgrades in self network element to be used for the registration table that route is calculated.
7. according to the described method of arbitrary claim in the claim 1 to 3, it is characterized in that described steps A may further comprise the steps:
When the network element protocol stack detects that the last item control channel becomes down state by upstate between this network element and a network element node, the flow engineering link transition of all upstates that this network element protocol stack will link to each other with this network element node is a degrading state, and the degradation information of these flow engineering links is reported the control plane of this network element.
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| CN2008101426631A CN101325456B (en) | 2008-07-24 | 2008-07-24 | Method for processing degrade of TE link in an optical network |
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| CN2008101426631A CN101325456B (en) | 2008-07-24 | 2008-07-24 | Method for processing degrade of TE link in an optical network |
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| CN101325456A CN101325456A (en) | 2008-12-17 |
| CN101325456B true CN101325456B (en) | 2011-10-26 |
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| CN101990133B (en) * | 2009-07-31 | 2014-02-19 | 中兴通讯股份有限公司 | Maintenance method and system for degradation alarm status of automatically switched optical network service |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885789A (en) * | 2005-06-23 | 2006-12-27 | 华为技术有限公司 | Channel failure handling method in ASON |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885789A (en) * | 2005-06-23 | 2006-12-27 | 华为技术有限公司 | Channel failure handling method in ASON |
Non-Patent Citations (2)
| Title |
|---|
| J.lang等.Link Management Protocol(LMP).《Request for Comments 4204》.2005,第13页章节3.2.4. * |
| 钟梓诚等.基于GMPLS的智能光网络生存性研究.《光通信技术》.2008,第2008年卷(第6期),第14-17页. * |
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