CN1093709C - Method of carrying out fast protection conversion - Google Patents
Method of carrying out fast protection conversion Download PDFInfo
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- CN1093709C CN1093709C CN 98113149 CN98113149A CN1093709C CN 1093709 C CN1093709 C CN 1093709C CN 98113149 CN98113149 CN 98113149 CN 98113149 A CN98113149 A CN 98113149A CN 1093709 C CN1093709 C CN 1093709C
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- control data
- fault point
- data memory
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Abstract
The present invention relates to a method for realizing fast protection switch. Each SDH net element can automatically generate cross-linking array control data in a normal work mode and various protection modes to store in a cross-linking array control data storing area preserved in each net element. When a loop occurs various faults, the following steps are executed: each SDH net element respectively determines the position relative to a fault point; a main control unit in each SDH net element issues a switching command according to the position relative to the fault point; each net element executes the switching command to switch the cross-linking array control data in the normal work mode to the cross-linking array control data in the corresponding protection mode.
Description
The present invention relates to the communications field, relate more specifically to loop APS technology under the networking mode of SDH protection rings.
Under the networking mode of SDH protection rings, cross-connect matrix is the actuator of loop APS.The time of loop APS is made up of two parts: passing time and the acknowledging time of protection turning protocol on ring; Each network element execute protection is switched the time of implementation of order.Under the situation big at cross-capacity, that the rank of intersecting is low (as other intersection of VC-12 level), the control data amount of cross-connect matrix is very big, thereby each network element need be changed a large amount of control datas of cross-connect matrix when carrying out APS.The time that reconfigures to cross-connect matrix when in this case, each network element execute protection is switched order has determined the whole required time of loop APS.
The present invention considers: as shown in Figure 1 in the looped network, when loop breaks down, any one network element with respect to the position of fault point nothing more than adjacent with the fault point clockwise direction (as network element B), with the fault point counterclockwise adjacent (as network element C), with these three kinds of situations of fault point non-conterminous (as network element A and D), so the switching operation that any one network element may be carried out when loop breaks down is limited.
Purpose of the present invention just provides a kind ofly switches the method for execution speed to realize that fast automatic protection is switched by improving the network element protection.
The present invention is a kind of to be realized in the method for quick protective switch; each SDH network element is according to the protected mode of its professional upper and lower relation and loop; automatically generate the cross-connect matrix control data under operate as normal and the various protected mode and leave in the cross-connect matrix control data memory block of reserving in each network element every kind of corresponding control data memory page of cross-connect matrix control data in.When various fault takes place loop, carry out following steps:
-each network element is determined its position with respect to the fault point separately;
Main control unit in-each network element issues with respect to residing position, fault point according to it and switches order;
-each network element is carried out and is switched order, and the interconnection control data memory page under its operate as normal is switched to control data memory page under the corresponding described protected mode.
Adopt method of the present invention; network element only needs to carry out operation that a cross-connect matrix control data page switches and promptly finishes protection and switch after order is switched in execution, whole protect networks switching time is equal to the transmission and the acknowledging time of APS agreement basically.And irrelevant with the amount of capacity of each network element cross-connect matrix and the rank of intersecting, therefore greatly reduce the time of protecting switching operation.
Now describe embodiments of the invention in conjunction with the accompanying drawings in detail, description of drawings is as follows:
Fig. 1 is the position view of two each network element of fine looped network of explanation SDH with respect to the fault point;
Fig. 2 is the structural representation of cross-connection unit in the SDH network element.
As shown in Figure 1, when loop broke down, each network element was as follows with respect to the position of fault point: network element B is adjacent with the fault point clockwise direction, and network element C and fault point are counterclockwise adjacent, and network element A and D and fault point are non-conterminous.
Referring to Fig. 2, cross-connection unit comprises two parts in the SDH network element: finish cross-coupled cross-connect matrix 201 and cross-connect matrix control data memory block 202, the interconnection control data that cross-connect matrix control data storage area stores is configured cross-connect matrix.For a SDH network element; after road business and system works pattern are determined up and down; the interconnection of this network element determines thereupon that also promptly the cross-connect matrix control data of network element all respectively has a cover established data with respect to normal operation mode and various protection situation.By to the analysis of Fig. 1 as can be known, for each network element, after business relations were determined, its possible cross-connect matrix control data had following four kinds of situations:
(1) operate as normal,
(2) network element adjacent with the fault point clockwise direction,
(3) network element and fault point counterclockwise adjacent,
(4) network element and fault point are non-conterminous.
When carrying out the network element initialization; each network element is according to the protected mode of its professional upper and lower relation and loop; automatically generate the cross-connect matrix control data of above-mentioned four kinds of situations; and these control datas are deposited in the cross-connect matrix control data memory block in corresponding four control data memory pages, these four control data memory pages can correspondingly be numbered:
I: operate as normal control data memory page,
II: protection working controlling data memory page when adjacent with the fault point clockwise direction,
III: with the fault point protection working controlling data memory page when counterclockwise adjacent,
IV: non-conterminous time protection working controlling data memory page with the fault point.
A work at present page indicator variable is set simultaneously, and when the network element operate as normal, this variable is set to point to page I.
When loop broke down, each network element was determined its position with respect to the fault point by APS (ASP) agreement, and promptly network element B is adjacent with the fault point clockwise direction, and network element C and fault point are counterclockwise adjacent, and network element A and D and fault point are non-conterminous.Main control unit in each network element issues to the cross-connection unit of this network element by mailbox with respect to residing position, fault point according to this network element and switches order.After cross-connection unit is received and is switched order; the working page indicator variable of this network element is set to point to the control corresponding storage page: the working page indicator variable of network element B is set to point to page II; the working page indicator variable of network element C is set to point to page III; the working page indicator variable of network element A and D is set to point to page IV, thereby has finished the protection switching operation.
Claims (3)
1, a kind of SDH protection rings networking mode is realized the method for quick protective switch down; it is characterized in that: each SDH network element (A, B, C, D) is according to the protected mode of its professional upper and lower relation and loop; cross-connect matrix control data under automatic generation operate as normal and the various protected mode also leaves in the cross-connect matrix control data memory block of reserving in each network element (202); the control data memory page of a correspondence is set for every kind of cross-connect matrix control data; when various fault takes place loop, carry out following steps:
-each SDH network element is determined its position with respect to the fault point separately;
Main control unit in-each SDH network element issues with respect to residing position, fault point according to it and switches order;
-each described network element is carried out and is switched order, and the interconnection control data memory page under its operate as normal is switched to control data memory page under the corresponding described protected mode.
2, SDH protection rings networking mode is realized down the method for quick protective switch according to claim 1, and it is characterized in that: each SDH network element is provided with following four control data memory pages:
I: operate as normal control data memory page,
II: protection working controlling data memory page when adjacent with the fault point clockwise direction,
III: with the fault point protection working controlling data memory page when counterclockwise adjacent,
IV: non-conterminous time protection working controlling data memory page with the fault point.
3, realize the method for quick protective switch down as SDH protection rings networking mode as described in the claim 2; it is characterized in that: each SDH network element is provided with a work at present page indicator variable; when this network element operate as normal; described work at present page indicator variable is set to point to described operate as normal control data memory page; when the SDH loop broke down, each SDH network element was carried out following steps:
-be set to point to the adjacent protection working controlling data of described fault point clockwise direction memory page at the described work at present page indicator variable of adjacent this network element of network element (B) of described fault point clockwise direction;
-be set to point to described fault point adjacent protection working controlling data memory page counterclockwise at the described work at present page indicator variable of counterclockwise adjacent this network element of network element (C) in described fault point;
-(A, D) the described work at present page indicator variable of this network element is set to point to described and fault point protection working controlling data memory page when non-conterminous at the non-conterminous network element in described fault point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113149 CN1093709C (en) | 1998-03-20 | 1998-03-20 | Method of carrying out fast protection conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113149 CN1093709C (en) | 1998-03-20 | 1998-03-20 | Method of carrying out fast protection conversion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1230065A CN1230065A (en) | 1999-09-29 |
| CN1093709C true CN1093709C (en) | 2002-10-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98113149 Expired - Fee Related CN1093709C (en) | 1998-03-20 | 1998-03-20 | Method of carrying out fast protection conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1093709C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100336327C (en) * | 2002-11-02 | 2007-09-05 | 中兴通讯股份有限公司 | Full optical fiber network two fiber bidirectional loop channel shared protective device |
| CN100372250C (en) * | 2004-01-20 | 2008-02-27 | 华为技术有限公司 | Branch circuit unit protection switching method and device |
| ATE330443T1 (en) * | 2004-07-02 | 2006-07-15 | Cit Alcatel | METHOD FOR RESTORING TRANSPORTATION NETWORKS SUPPORTING ADDITIONAL TRAFFIC |
| CN1808950B (en) * | 2005-01-19 | 2010-04-14 | 华为技术有限公司 | Method of dynamic bandwidth adjustment for protection ring of multiplexed segment |
| CN101515833B (en) * | 2008-02-21 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for realizing protection rearrangement |
| CN102142975B (en) * | 2010-02-01 | 2015-05-13 | 中兴通讯股份有限公司 | Method and system for service protection based on dual node interconnection protection structure in transmission network |
| CN111211859B (en) * | 2019-12-02 | 2021-11-19 | 北京直真科技股份有限公司 | Automatic generation method of wavelength division emergency transmission channel scheduling scheme |
-
1998
- 1998-03-20 CN CN 98113149 patent/CN1093709C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1230065A (en) | 1999-09-29 |
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