CN1472890A - Prevention of fault connection of oplical transfer loop network transmission businesses - Google Patents
Prevention of fault connection of oplical transfer loop network transmission businesses Download PDFInfo
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- CN1472890A CN1472890A CNA021363544A CN02136354A CN1472890A CN 1472890 A CN1472890 A CN 1472890A CN A021363544 A CNA021363544 A CN A021363544A CN 02136354 A CN02136354 A CN 02136354A CN 1472890 A CN1472890 A CN 1472890A
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Abstract
A method that can prevent operation link errors in the ring structure of optical transmission net, it concerns with optical transmission field, including following steps: 1 the administration layer of net configures operation idle when net is organized, and appointing the source net element and the destination net element of each of the operation idle; 2 the administration layer opf net sends down each of the net elements the operation idle that concerns with each of the net element; 3 the administration layer of net sends down topology message connecting with each of the net element to the each of the net element; 4 creating the list of error resistant in advance; 5 checking current net element whether meeting the condition of error resistant, if yes then turn to next step, otherwise turn to step 8; 6 searching the list of operation error resistant.
Description
Technical field
The present invention relates to the optical transmission field, be specifically related to optical transmission ring network transport service.
Background technology
The wrong company of optical transmission ring network transport service is the problem that the optical transmission field often occurs.Usually, after transmission looped network broke down, the protection of transmission equipment was switched software and is switched by the ring bridge joint that (bridge joint is to send professional a kind of measure simultaneously to Working service passage and protection passage; Switch and be meant and receiving when professional, originally from the Working service passage receive professional mode change into from the protection passage receive professional measure) the measure recovery transport service of interrupting owing to fault.When this fault two places or two places takes place when above in transmission looped network; whole transmission looped network off-the-line; promptly from physical connection or the professional angle that transmits, transmission looped network is broken down into several isolated mutually parts, and the transport service between the optical transmission looped network equipment just through regular meeting takes place wrong the company.Network shown in Fig. 1 (A) if dispose the two-way services that are numbered 1# between network element A and the network element C, disposes the two-way services that are numbered 1# between network element B and the network element C.As network element A and network element C; fiber break between network element B and the network element C, the protection of network element A, B are switched software and will be immediately started the measure of switching of ring bridge joint in A-C direction and B-C direction and recover network element A and pass through the business of network element C to network element A through network element C to business and the network element B of network element B.
Shown in Fig. 1 (B), A sent to the business that C is numbered 1# and will be received by network element B this moment, and B sends to the business that C is numbered 1# will be received the wrong phenomenon that connects of typical transport service that Here it is by network element A.In order to guarantee the fail safe of transport service, when wrong the company takes place, the business that requires middle immediately dislocation to connect.The method of interrupting service normally is pressed into (AIS) at corresponding transmission channel transmitting terminal, and G.841 ITU-T advises this operating process is called compacting (Squelching).For example, if transmission channel is administrative unit groups (AUG), then go into Administration unit alarm indication signal (AU_AIS) in in-passage pressure; If transmission channel is tributary unit group (TUG), then go into Tributary unit alarm indication signal (TU_AIS) in in-passage pressure.After professional receiving terminal detects the ais alarm indication, interrupt the business of receiving automatically.
Hence one can see that, prevents that the wrong groundwork that connects of optical transmission looped network transport service from being to search and discern wrong connection business.
Number of patent application is that 99123039 Chinese patent " method for inhibiting continuous errors in the ring-shaped optical SDH network " has been described a kind of method of discerning wrong connection business and wrong connection business being suppressed, identify as channels track by business time-slot configuration unique effective path overhead byte J1 of assignment or J2 byte, corresponding business is suppressed according to this whether marking matched determining whether.This identification wrong connection business and method that wrong connection business is suppressed to hardware environment have relatively high expectations, reliability is not high, and this inventive method is the correcting method after a kind of fault, rather than prevents method.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned shortcoming; characteristics in conjunction with the optical transmission ring network; utilize existing multiplex section (part of SDH transmission information frame) protection switch messages; seek that a kind of realization is convenient, cost is low, can satisfy the professional wrong method that connects that prevents of professional transmission reliability simultaneously again.
The present invention adopts and generates the wrong traffic table of resistance in advance (by the wrong business that connects may take place, comprise the collection of services that business that business that the purpose network element loses and source network element are lost is formed) method discern wrong connection business in advance, and the wrong traffic table of retrieval resistance obtains wrong connection business and suppresses when satisfying the wrong condition of professional resistance.
Technical scheme of the present invention comprises the steps:
In the 1st step, when networking, carry out the business time-slot configuration, and specify the source network element and the purpose network element of each business time-slot by the webmaster layer;
In the 2nd step, the webmaster layer is issued to each network element device with the business time-slot relevant with each network element;
In the 3rd step, the webmaster layer is issued to each network element with the topology information that each network element in the looped network links to each other;
In the 4th step,, generate the wrong traffic table of resistance in advance according to business time-slot configuration information and ring network topology information;
The 5th step, detect this network element and whether satisfy the wrong condition of professional resistance, promptly whether this network element bridge joint takes place is switched simultaneously whether off-the-line of transmission looped network, is then to change next step over to, otherwise changes for the 8th step over to;
In the 6th step, the wrong traffic table of retrieval resistance obtains the business that lose in business that purpose can not arrive and source, and these business are suppressed;
The 7th step, when the wrong condition of professional resistance no longer satisfies, in being pressed professional passage, cancel pressing operation, it is normal that trouble-free business will be recovered;
The 8th step, detects the business time-slot relevant configuration and whether changes with this network element, detect the topology information that each network element of looped network links to each other and whether change, if arbitrary change then change the 4th over to go on foot, renewal hinders wrong traffic table; If do not change, then changed for the 5th step over to.
Compare with existing method, the method for the invention implementation procedure is simpler, and versatility is good, and hardware cost is low.This method is a kind of logical method, and whether off-the-line as judging whether the professional wrong condition that connects takes place to rely on transmission looped network, tallies with the actual situation, and is simple.Because this method does not adopt the method for fetch channel overhead byte, hardware environment is not proposed other requirement yet, therefore can adopt function less, lower-cost hardware; Generate the wrong traffic table method of resistance in advance because the present invention adopts, meeting under the professional wrong latticing spare, only need the wrong traffic table of retrieval resistance just can obtain hindering wrong information, therefore carry out the efficient height; The present invention analyzes and the identification wrong connection business in conjunction with business time-slot configuring condition and ring-network topology relation is unified, and to compare reliability higher with existing method; The present invention is that also transmission equipment suppresses wrong connection business after the ring bridge joint is switched instruction immediately carrying out, and is a kind of method that prevents trouble before it happens.
Description of drawings
Fig. 1 (A) is the transmission looped network schematic diagram of transport service under normal circumstances.
Fig. 1 (B) is that the professional wrong schematic diagram that connects takes place transmission looped network transport service under failure condition.
Fig. 2 is the flow chart of the method for the invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
Fig. 1 (A), Fig. 1 (B) partly are described in background technology.
Fig. 2 is the flow chart of the method for the invention, and wherein the 4th step was according to business time-slot configuration and the ring network topology information relevant with this network element, generated the wrong traffic table of resistance in advance.The memory contents that hinders wrong traffic table is divided into two parts: switch the business that lose in business that the direction purpose can not arrive and the direction of not switching source.If transmission looped network by network element 1, network element 2 ..., n network element such as network element n-1 and network element n form.Each network element annexation is as follows: network element 1 connects in turn to network element n, finally constitutes a transmission looped network.With it is the specific implementation process that example illustrates the 4th step and the 6th step respectively.
The 4th step comprised that current network was around the implementation procedure of a direction of ring and the current network implementation procedure around the other direction of ring.Wherein, the implementation procedure of a direction is as follows:
1. current network is a network element 1, establishes this network element and breaks down with the direction that network element n links to each other, and network element startup ring bridge joint is switched after the fault;
2. hypothesis network element 2 breaks down in the direction that links to each other with network element 3, and network element startup ring bridge joint is switched after the fault;
3. try to achieve each network element isolated, be respectively with this network element and network element 2: network element 3, network element 4 ..., network element n-1 and network element n;
4. calculate whether link to each other with the network element 2 source network element of transmission business of direction of this network element is the network element that step 3 is tried to achieve; If, then this business is inserted the wrong traffic table of resistance, be stored in and the corresponding position of current fault signature;
5. calculate whether link to each other with the network element n purpose network element of transmission business of direction of this network element is the network element that step 3 is tried to achieve; If, then this business is inserted the wrong traffic table of resistance, be stored in and current fault signature the direction that promptly this network element breaks down with the direction that network element n links to each other, network element 2 links to each other with the network element 3 corresponding position of breaking down;
6. suppose between network element 3 and 4 successively, between network element 4 and the network element 5 ..., network element network element n-1 and network element n between break down and start bridge joint and switch, generate the wrong information of resistance according to step 3,4,5 described methods;
Can finish the implementation procedure of current network according to above-mentioned steps 1 to 6 described process around the other direction of ring.
The 6th step judged mainly whether this network element satisfies the wrong condition of professional resistance.The search condition that hinders wrong traffic table for this network element break down direction, with another network element and the fault direction thereof of this network element with the looped network off-the-line.Its specific implementation process comprises that current network is around the implementation procedure of a direction of ring and the current network implementation procedure around the other direction of ring.The implementation procedure of one of them direction is as follows:
1), judge when preceding network element is network element 1 this network element link to each other with network element n direction break down and receive the ring bridge joint switch instruction? be then to change next step over to, otherwise change the deterministic process of other direction over to;
2), judge network element 2 link to each other with network element 3 direction, network element 3 link to each other with network element 4 direction ... does or network element n-1 break down with the direction that network element n links to each other? be then to retrieve the wrong traffic table of resistance, draw this network element direction that links to each other with network element n and send each business that purpose is lost in the business, this network element direction that links to each other with network element 2 is sent each business that lose in the source in the business, and these business are suppressed;
According to above-mentioned steps 1), 2) described process, can finish the implementation procedure of other direction of current network around ring.
Claims (3)
1, a kind of wrong method that connects of optical transmission ring network transport service that prevents comprises the steps:
In the 1st step, when networking, carry out the business time-slot configuration, and specify the source network element and the purpose network element of each business time-slot by the webmaster layer;
In the 2nd step, the webmaster layer is issued to each network element device with the business time-slot relevant with each network element;
In the 3rd step, the webmaster layer is issued to each network element with the topology information that each network element in the looped network links to each other;
In the 4th step,, generate the wrong traffic table of resistance in advance according to business time-slot configuration information and ring network topology information;
The 5th step, detect this network element and whether satisfy the wrong condition of professional resistance, promptly whether this network element bridge joint takes place is switched simultaneously whether off-the-line of transmission looped network, is then to change next step over to, otherwise changes for the 8th step over to;
In the 6th step, the wrong traffic table of retrieval resistance obtains the business that lose in business that purpose can not arrive and source, and these business are suppressed;
The 7th step, when the wrong condition of professional resistance no longer satisfies, in being pressed professional passage, cancel pressing operation, it is normal that trouble-free business will be recovered;
The 8th step, detects the business time-slot relevant configuration and whether changes with this network element, detect the topology information that each network element of looped network links to each other and whether change, if arbitrary change then change the 4th over to go on foot, renewal hinders wrong traffic table; If do not change, then changed for the 5th step over to.
2, the wrong method that connects of optical transmission ring network transport service that prevents as claimed in claim 1, it is characterized in that described the 4th step comprises: current network is around the implementation procedure of a direction of ring and the current network implementation procedure around the other direction of ring, and the implementation procedure of one of them direction is as follows:
1. current network is a network element 1, establishes this network element and breaks down with the direction that network element n links to each other, and network element startup ring bridge joint is switched after the fault;
2. hypothesis network element 2 breaks down in the direction that links to each other with network element 3, and network element startup ring bridge joint is switched after the fault;
3. try to achieve each network element isolated, be respectively with this network element and network element 2: network element 3, network element 4 ..., network element n-1 and network element n;
4. calculate whether link to each other with the network element 2 source network element of transmission business of direction of this network element is the network element that step 3 is tried to achieve; If, then this business is inserted the wrong traffic table of resistance, be stored in and the corresponding position of current fault signature;
5. calculate whether link to each other with the network element n purpose network element of transmission business of direction of this network element is the network element that step 3 is tried to achieve; If, then this business is inserted the wrong traffic table of resistance, be stored in and current fault signature the direction that promptly this network element breaks down with the direction that network element n links to each other, network element 2 links to each other with the network element 3 corresponding position of breaking down;
6. suppose between network element 3 and 4 successively, between network element 4 and the network element 5 ..., network element network element n-1 and network element n between break down and start bridge joint and switch, generate the wrong information of resistance according to step 3,4,5 described methods;
Can finish the implementation procedure of current network according to above-mentioned steps 1 to 6 described process around the other direction of ring.
3, the wrong method that connects of optical transmission ring network transport service that prevents as claimed in claim 1, it is characterized in that described the 6th step comprises: current network is around the implementation procedure of a direction of ring and the current network implementation procedure around the other direction of ring, and the implementation procedure of one of them direction is as follows:
1), judge when preceding network element is network element 1 this network element link to each other with network element n direction break down and receive the ring bridge joint switch instruction? be then to change next step over to, otherwise change the deterministic process of other direction over to;
2), judge network element 2 link to each other with network element 3 direction, network element 3 link to each other with network element 4 direction ... does or network element n-1 break down with the direction that network element n links to each other? be then to retrieve the wrong traffic table of resistance, draw this network element direction that links to each other with network element n and send each business that purpose is lost in the business, this network element direction that links to each other with network element 2 is sent each business that lose in the source in the business, and these business are suppressed;
According to above-mentioned steps 1), 2) described process, can finish the implementation procedure of other direction of current network around ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021363544A CN1472890A (en) | 2002-07-30 | 2002-07-30 | Prevention of fault connection of oplical transfer loop network transmission businesses |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA021363544A CN1472890A (en) | 2002-07-30 | 2002-07-30 | Prevention of fault connection of oplical transfer loop network transmission businesses |
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| CN1472890A true CN1472890A (en) | 2004-02-04 |
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| CNA021363544A Pending CN1472890A (en) | 2002-07-30 | 2002-07-30 | Prevention of fault connection of oplical transfer loop network transmission businesses |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006079286A1 (en) * | 2005-01-25 | 2006-08-03 | Huawei Technologies Co., Ltd. | A service rerouting triggering method |
| CN1812299B (en) * | 2005-01-28 | 2010-11-10 | 华为技术有限公司 | Multiplying segment suppressing method |
| WO2010145569A1 (en) * | 2009-06-29 | 2010-12-23 | 中兴通讯股份有限公司 | Method and system for automatically discovering topology of node internal resources |
-
2002
- 2002-07-30 CN CNA021363544A patent/CN1472890A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006079286A1 (en) * | 2005-01-25 | 2006-08-03 | Huawei Technologies Co., Ltd. | A service rerouting triggering method |
| CN100531092C (en) * | 2005-01-25 | 2009-08-19 | 华为技术有限公司 | Intelligent optical network business re-routing trigging method |
| CN1812299B (en) * | 2005-01-28 | 2010-11-10 | 华为技术有限公司 | Multiplying segment suppressing method |
| WO2010145569A1 (en) * | 2009-06-29 | 2010-12-23 | 中兴通讯股份有限公司 | Method and system for automatically discovering topology of node internal resources |
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