CN101141211B - Device and method for guaranteeing multiplex section rearrangement consistency - Google Patents
Device and method for guaranteeing multiplex section rearrangement consistency Download PDFInfo
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- CN101141211B CN101141211B CN2007101115619A CN200710111561A CN101141211B CN 101141211 B CN101141211 B CN 101141211B CN 2007101115619 A CN2007101115619 A CN 2007101115619A CN 200710111561 A CN200710111561 A CN 200710111561A CN 101141211 B CN101141211 B CN 101141211B
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Abstract
A method for keeping the compatibility of the multiplex section switching is provided: based on the diagnostic information of network element, the relevant increased value is arranged for examining and clocking of each; switching information can be sent from one network element to adjoining network element via the protocol k bytes, so that the switching is made in the adjoin network element and the examination and clocking which are correspondent to the adjoining network element are launched; also, switching can be revoked as the examination and clocking are over. Meanwhile, a device for guarantee the compatibility of multiplex section switching is provided; such device comprises an arrangement module, a processing module and a revoking mode. Thus, the APSID of various network elements in the protection group can be adopted to guarantee the asynchronization of examination and clocking for switching revoke of each network element, so as to solve the inconsistency of multiplex section switching.
Description
Technical field
The present invention relates to Optical synchronization digital transmission (SDH) technology, particularly, relate to the more reliable and stable device and method of assurance multiplex section protection exchanging in a kind of Optical synchronization digital transmission.
Background technology
In optical transmission process, in order to guarantee the unobstructed of backbone network and to improve the self-protection ability of network, set up multi-section shared protection mechanism, guarantee a certain section of striding go wrong or a certain network element when going wrong whole network at 50 milliseconds with interior self-healing; A lot of in addition equipment suppliers provide two cross boards in order to make whole multiplex section protection exchanging mechanism more perfect on network element, a main usefulness, and one from usefulness, guarantees that like this multiplex section protection exchanging is more reliable.The present invention proposes to occur in the practical application main with and from occurring the inconsistent solution of switch status when the rearrangement revocation with cross board.
At first introduce in the multiplex section protection exchanging main with cross board and principle from protecting mutually with cross board.In multiplex section protective ring, when switching when taking place, the cross board of each network element is carried out the action of switching, in order to prevent that wherein a cross board damages, so a general configuration two cross boards, a main usefulness, one from using.Under the situation of operate as normal, service board can select any cross board to come work, because what service board adopted is the notion of back board service bus, so for every service board, may there be several service bus in it, and every service bus can be chosen on the different cross boards.If generation multiplex section rearrangement, transmit switch messages by the K byte between the network element, corresponding switching action takes place in two cross boards after receiving corresponding K byte, even at this moment the service bus of service board is chosen in different cross boards, since main with and from cross board switching action takes place all, also operate as normal after switching.
But, in the process of rearrangement revocation, cross board detects the rearrangement revocation condition and handles turning protocol needs the time, concerning same network element, when receiving the agreement K byte of adjacent network element, two cross boards may be poor if having time to the detection timing of rearrangement revocation condition, rearrangement revocation wherein, if another piece cross board just detects the condition of rearrangement revocation after receiving protocol byte, just can not do the corresponding protocol action, thereby be in switch status always, cause the switch status of last two cross boards inconsistent.This situation seldom occurs itself, but in case occur, it is inconsistent that two cross board switch status just occur, because the service bus of service board may be chosen on the different cross boards, also may be that different service boards is chosen on the different cross boards, interrupt thereby partial service occurs.
From existing solution; can allow all service boards all be chosen in simultaneously on the cross board; even two cross boards occur switching inconsistent like this; because in fact there is not that piece cross board of bearer service bus can not have influence on business; so can evade this problem to a certain extent, just not embody two cross boards as leading usefulness and advantage from being used for protecting each other but do like this.
In a single day the solution that prior art does not also find for this problem, or allow its exist though the probability that takes place is very low, two cross boards occurs and switches inconsistently, just may have influence on business; Only use a cross board, allow other one as standby, but can not embody so the advantage that two cross boards are protected mutually.The present invention is directed to the inconsistent problem of this multiplex section rearrangement and proposed good solution.
The present invention proposes the inconsistent method of a kind of solution multiplex section rearrangement, utilize the APSID of different network elements in the protection group to guarantee the detection timing time difference of the rearrangement revocation condition of each network element, thereby solved the inconsistent problem of multiplex section rearrangement state.Technical scheme simplicity of design of the present invention also can solve the inconsistent problem of switching simultaneously well.
Summary of the invention
Main purpose of the present invention is to utilize the APSID of different network elements in the protection group to guarantee the detection timing time difference of the rearrangement revocation condition of each network element, thereby solves the inconsistent problem of multiplex section rearrangement state.
To achieve these goals, according to a first aspect of the invention, the invention provides a kind of method that guarantees multiplex section rearrangement consistency, it comprises:
According to the characteristic information of network element, the detection timing that is respectively each network element is provided with corresponding increment size;
Transmit switch messages from a network element to adjacent network element by agreement K byte, adjacent network element carries out switching operation and starts and the corresponding detection timing of adjacent network element; And
When detecting the timing end, cancel switching operation.
The increment size of adjacent network element is inequality, and the increment size between two network elements of the single network element in any interval is also inequality.
Characteristic information can be APSID.
If APSID≤4, then increment size=APSID; If APSID〉4, the %3+2 of increment size=(APSID-2) then.
The maximal increment value can be greater than or equal to 4.
Two cross boards in the network element receive switch messages, and carry out switching operation and cancel switching operation.
To achieve these goals, according to a further aspect in the invention, provide a kind of device that guarantees multiplex section rearrangement consistency, this device comprises:
Module is set, is used for the characteristic information according to network element, the detection timing that is respectively each network element is provided with corresponding increment size;
Processing module is used for by agreement K byte switch messages being transmitted to adjacent network element from a network element, makes adjacent network element carry out switching operation and startup and the corresponding detection timing of adjacent network element; And
Cancel module, be used for when detecting the timing end, cancelling switching operation.
The increment size of adjacent network element is inequality, and the increment size between two network elements of the single network element in any interval is also inequality.
Characteristic information can be APSID.
If APSID≤4, then increment size=APSID; If APSID〉4, the %3+2 of increment size=(APSID-2) then.
The maximal increment value can be greater than or equal to 4.
Processing module makes a plurality of cross boards in the network element receive switch messages, and carries out switching operation and cancel switching operation.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the method that guarantees multiplex section rearrangement consistency of the present invention;
Fig. 2 is the block diagram according to the device that guarantees multiplex section rearrangement consistency of the present invention;
Fig. 3 is the protection group that 14 network elements are formed, and wherein, the detection timing time increment size of the rearrangement revocation condition of each network element is set according to APSID;
Fig. 4 is the protection group that 5 network elements are formed, and wherein, the detection timing time increment size of the rearrangement revocation condition of each network element is set according to APSID; And
Fig. 5 is the protection group that 6 network elements are formed, and wherein, the detection timing time increment size of the rearrangement revocation condition of each network element is set according to APSID.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Describe the present invention below with reference to the accompanying drawings in detail.
Fig. 1 is the flow chart according to the method that guarantees multiplex section rearrangement consistency of the present invention.
With reference to Fig. 1, a kind of method that guarantees multiplex section rearrangement consistency is provided, it comprises:
Step S102, according to the characteristic information of network element, the detection timing that is respectively each network element is provided with corresponding increment size;
Step S104 transmits switch messages from a network element to adjacent network element by agreement K byte, and adjacent network element carries out switching operation and starts and the corresponding detection timing of adjacent network element; And
Step S106 when detecting the timing end, cancels switching operation.
The increment size of adjacent network element is inequality, and the increment size between two network elements of the single network element in any interval is also inequality.
Characteristic information can be APSID.
If APSID≤4, then increment size=APSID; If APSID〉4, the %3+2 of increment size=(APSID-2) then.
The maximal increment value can be greater than or equal to 4.
Two cross boards in the network element receive switch messages, and carry out switching operation and cancel switching operation.
Fig. 2 is the block diagram according to the device that guarantees multiplex section rearrangement consistency of the present invention.
With reference to Fig. 2, a kind of device that guarantees multiplex section rearrangement consistency is provided, this device comprises:
Cancel module 204, be used for when detecting the timing end, cancelling switching operation.
The increment size of adjacent network element is inequality, and the increment size between two network elements of the single network element in any interval is also inequality.
Characteristic information can be APSID.
If APSID≤4, then increment size=APSID; If APSID〉4, the %3+2 of increment size=(APSID-2) then.
The maximal increment value can be greater than or equal to 4.
The present invention is switching inconsistent processing to two cross boards, mainly be to allow each network element for the detection timing time of rearrangement revocation condition difference to some extent, this time difference finally can have influence on when receiving adjacent network element K byte, and the detection timing of two cross boards of this network element more reaches unanimity.Make the rearrangement revocation condition of adjacent network element different detection time; and make the detection time of two network elements of single network element at interval also different; the present invention comes the detection timing time of rearrangement revocation condition is provided with a different increment size according to APSID; because during networking all is a multiplex section protective ring, so when this increment size is set, will note the situation of head and the tail network element.
The state that switching appears in two cross boards on the same network element is inconsistent, be because two cross boards timing difference occurs and cause in the detection timing to the rearrangement revocation condition, because two cross boards are independent timing, though be the unified detection time that network element is provided with the rearrangement revocation condition on the webmaster, because two cross board independence timing, time deviation always exists, may be about tens milliseconds, the rearrangement revocation condition of cross board detection timing time arrives when receiving the agreement K byte of adjacent network element, it is just cancelled and switches, if other cross board rearrangement revocation condition when receiving same K byte detects timing and does not also arrive, it just keeps switch status, two cross boards so just occur and switched inconsistent situation, thus the business of having influence on.
Above description can simplify when being described as two cross boards and receiving same K byte the rearrangement revocation condition to detect timing time inconsistent, when receiving the K byte of adjacent network element, if can allow the rearrangement revocation condition detected state unanimity of two cross boards, just can avoid the last switch status that occurs inconsistent.So can allow adjacent network element or interval network element different, thereby it is inconsistent to avoid two cross boards switch status to occur for the time that the rearrangement revocation condition detects timing.
The simplest way is provided with on webmaster exactly; for each different network elements that is positioned at same protection group; the rearrangement revocation condition detects timing and is set to difference; though guaranteeing by the artificial method that is provided with that switch status is consistent like this can deal with problems; but it is unreliable; because the networking in reality is very complicated, any one link carelessness is with regard to bad prediction.
Because when the protection configuration set; all be provided with a unique APSID number for each network element in the protection group; and the APSID of adjacent network element also is adjacent, can utilize this APSID number, and it is different to rely on software to guarantee that the rearrangement revocation condition of different network elements detects timing.
Consider in switching that besides the section of striding goes wrong or a network element goes wrong, two points switching are adjacent or two points of the single network element in interval, so can allow when further being provided with adjacent two network elements and at interval the rearrangement revocation condition of two network elements of single network elements to detect timing different, between other network element, its rearrangement revocation condition detection timing time is identical, and also it doesn't matter.
As shown in Figure 3; what show is the situation of the multiplex section ring of 14 network elements compositions; the left side is the APSID in the protection group number of each network element correspondence; the right side is the increment size that detects timing according to the rearrangement revocation condition that each APSID is provided with; setting from figure as can be seen; the increment size that does not have two adjacent network elements is identical, and the increment size between two network elements of the single network element in any interval is also inequality simultaneously.
The calculating of corresponding increment size is:
If APSID≤4, then increment size=APSID;
If APSID〉4, the %3+2 of increment size=(APSID-2) then.
The maximal increment value that adopts among the present invention is 4, if the maximal increment value, will occur adjacent network element less than 4 or at interval the increment size between two network elements of single network element is identical.
As shown in Figure 4, multiplex section ring for 5 network elements compositions, the right figure of Fig. 4 has shown the setting of increment size, corresponding A PSID is 4 network element, increment size is set to 0 or 3, and is just identical with adjacent network element increment size, if increment size is set to 1 or 2, just identical with the increment size of the network element of interval network element, so being the increment size of 4 network element, corresponding A PSID must be set to 4.
As can be seen from Figure 4, the maximum of increment size can not be less than 4, otherwise may occur adjacent network element or at interval between two network elements of single network element increment size identical, thereby when rearrangement revocation took place, two cross boards may occurring in the network element, switch status to occur inconsistent.
To the setting of timing increment size, greater than 4 o'clock, increment size was since 2,2 at APSID among the present invention, and 3,4 begin circulation like this, and Fig. 5 has illustrated this point.
Fig. 5 has shown the situation of the multiplex section protective ring of 6 network element compositions.For APSID is 5 network element, just identical with the increment size of adjacent network element if its increment size is 0 or 4, if its increment size is 1 or 3, just the increment size with the interval network element is identical, so must be since 2.
The present invention is provided with an increment size for the detection timing of the rearrangement revocation testing conditions of the principal and subordinate's cross board in the network element, because cross board is very little to the timing error of detection time, by a very little Delta Time is set, when when receiving the K byte of adjacent network element, two cross boards are judged the detection of rearrangement revocation condition and are reached consistent, thereby avoided the inconsistency of two cross boards in multiplex section rearrangement.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a method that guarantees multiplex section rearrangement consistency is characterized in that, described method comprises:
According to the characteristic information of network element, the detection timing that is respectively each described network element is provided with corresponding increment size, wherein, described characteristic information is APS sign APSID, and if APSID≤4, then increment size=APSID, if APSID＞4, the then %3+2 of increment size=(APSID-2);
Transmit switch messages from a described network element to adjacent described network element by agreement K byte, adjacent described network element carries out switching operation and starts and the corresponding described detection timing of adjacent described network element; And
When described detection timing finishes, cancel described switching operation.
2. method according to claim 1 is characterized in that, the described increment size of adjacent described network element is inequality, and the described increment size between two described network elements of the single network element in any interval is also inequality.
3. method according to claim 1 is characterized in that the maximal increment value is greater than or equal to 4.
4. each described method in requiring according to aforesaid right is characterized in that two cross boards in the described network element receive described switch messages, and carries out described switching operation and the described switching operation of cancelling.
5. a device that guarantees multiplex section rearrangement consistency is characterized in that, described device comprises:
Module is set, be used for characteristic information according to network element, the detection timing that is respectively each described network element is provided with corresponding increment size, described characteristic information is APS sign APSID, if APSID≤4, if increment size=APSID then is APSID＞4, the then %3+2 of increment size=(APSID-2);
Processing module is used for by agreement K byte switch messages being transmitted to adjacent described network element from a described network element, makes adjacent described network element carry out switching operation and startup and the corresponding described detection timing of adjacent described network element; And
Cancel module, be used for when described detection timing finishes, cancelling described switching operation.
6. device according to claim 5 is characterized in that, the described increment size of adjacent described network element is inequality, and the described increment size between two described network elements of the single network element in any interval is also inequality.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101115619A CN101141211B (en) | 2007-02-27 | 2007-06-19 | Device and method for guaranteeing multiplex section rearrangement consistency |
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| CN200710079941.9 | 2007-02-27 | ||
| CN200710079941 | 2007-02-27 | ||
| CN2007101115619A CN101141211B (en) | 2007-02-27 | 2007-06-19 | Device and method for guaranteeing multiplex section rearrangement consistency |
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| CN101141211B true CN101141211B (en) | 2011-09-21 |
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| CN105227339B (en) * | 2014-07-02 | 2019-11-12 | 南京中兴新软件有限责任公司 | Automatic protection switching APS condition processing method, device and APS node |
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| KR20010109017A (en) * | 2000-06-01 | 2001-12-08 | 서평원 | A method and a device of transmitting alarm and loop-back information for optical communication system |
| CN1484391A (en) * | 2002-09-21 | 2004-03-24 | 深圳市中兴通讯股份有限公司 | Method for raising protective inversion reliability in multiplexing section of optical transmission circular network |
| CN1783825A (en) * | 2004-12-03 | 2006-06-07 | 华为技术有限公司 | Multiplex section protective protocol realizing method |
| CN1801768A (en) * | 2004-12-31 | 2006-07-12 | 华为技术有限公司 | Multiplex section shared loop protecting method |
| CN1870509A (en) * | 2005-05-25 | 2006-11-29 | 中兴通讯股份有限公司南京分公司 | Method and device for raising protection stability of multi-section when clock plate switchover |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010109017A (en) * | 2000-06-01 | 2001-12-08 | 서평원 | A method and a device of transmitting alarm and loop-back information for optical communication system |
| CN1484391A (en) * | 2002-09-21 | 2004-03-24 | 深圳市中兴通讯股份有限公司 | Method for raising protective inversion reliability in multiplexing section of optical transmission circular network |
| CN1783825A (en) * | 2004-12-03 | 2006-06-07 | 华为技术有限公司 | Multiplex section protective protocol realizing method |
| CN1801768A (en) * | 2004-12-31 | 2006-07-12 | 华为技术有限公司 | Multiplex section shared loop protecting method |
| CN1870509A (en) * | 2005-05-25 | 2006-11-29 | 中兴通讯股份有限公司南京分公司 | Method and device for raising protection stability of multi-section when clock plate switchover |
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