CN1558604A - Method for master and backup cross connection modules protection switching - Google Patents
Method for master and backup cross connection modules protection switching Download PDFInfo
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- CN1558604A CN1558604A CNA2004100009214A CN200410000921A CN1558604A CN 1558604 A CN1558604 A CN 1558604A CN A2004100009214 A CNA2004100009214 A CN A2004100009214A CN 200410000921 A CN200410000921 A CN 200410000921A CN 1558604 A CN1558604 A CN 1558604A
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Abstract
A master and backup cross connection module protection automatic switching method, wherein signals exported to each line interface modules by the cross connection modules are detected, the master and backup cross connection modules detects the operating mode of the other, when the backup cross connection module detects the undesired operating mode of the master cross connection module, the backup cross connection module is switched automatically as the master cross connection module, the master and backup cross connection modules also detect the operating mode of themselves, when the master cross connection module finds undesired operating mode on itself, it automatically switches itself into backup cross connection module.
Description
Technical field
The present invention relates in synchronous digital hierarchy (SDH) system the cross-connect module of active and standby configuration be carried out the method for protectiveness automatic switchover, this method has same reference value to the other system that the protectiveness that has active and standby functional module automaticallyes switch.
Background technology
In synchronous digital hierarchy (SDH) system (SDH), be the redundancy backup of 1+1 to the function module design of key, cross-connect module etc. for example.Wherein, standby cross-connect module is in the Hot Spare state all the time.In principle, in case the master is broken down with cross-connect module, system should be able to automatically switch on the standby cross-connect module.
In actual engineering maintenance, have unexpected situation and take place.Almost interrupt completely through main business with module, system can't automatically switch all the time, up to taking artificial direct intervention.For unattended machine room, only reliable attendant drives in a vehicle to, circuit recovery time can only in hour, loss is unable to estimate.
It is not well established on the protection mechanism the problems referred to above main cause occurring.General producer promises to undertake that the condition that can automatically switch is, occurs field programmable gate array (FPGA) in the module and loads failure, during faults such as microprocessor (CPU) program counter misdirection, can realize the automatic switchover of main backup module.The producer that also has promises to undertake that spare module will obtain the main right to work of using automatically when detecting the master with module failure, substitute current master and use operational module.Other has some producers fixed-site with active and standby usefulness module when system design, even if the action of spare module has taken place to switch to when the master is broken down with module, in case it is main normal with module recovery, the change action of module takes place again once to use to fixing master with module from current master, the number of times that switches increases like this, can increase the unsteadiness of equipment undoubtedly.
Prior art is general to adopt following main and standby rearranging method: main backup module utilizes the CPU on the module separately to monitor the amount that can monitor in this module, if monitor and occur specific fault on the primary module, CPU on the primary module changes the operating state of primary module, and will lead by the ternary control gate of one-level and to use operating state " 0 " transfer standby operating state to " 1 "; Active and standby interconnection line by backboard, after being equipped with CPU on the module obtains primary module by the one-level isolating door the variation of operating state, the CPU that is equipped with on the module will change operating state, and also by the ternary control gate of one-level with standby operating state " 1 " become the main operating state of using " 0 ", thereby finished masterslave switchover.This masterslave switchover has precondition, i.e. the work of CPU in the module is normal, and the signal that module is exported to each LIM also is normal.Though this kind method can realize masterslave switchover, but on the reliability of masterslave switchover, there are several problems: first, module is exported to the undesired service disconnection that causes of signal of each LIM, and module this moment cisco unity malfunction in fact but can't be carried out masterslave switchover; The second, the CPU program running of module is undesired, causes normally monitoring this module, and the output services state of module is exactly insecure; The 3rd, the CPU power supply of module is undesired to cause CPU work not normal; The 4th, it is undesired that the power supply of output stage is supplied with, and causes output services status signal level may be on the intermediate level position, also can't carry out masterslave switchover; The 5th, the position of main backup module is fixed, in case main with after the module failure elimination, the main module of using will be refunded again from spare module by system, increases and switches link, causes extra fault easily.
The imperfection of test point also is to influence the unreliable major reason of switching of equipment.If the main power source work of module own is undesired, can't monitor self FPGA and load whether success, can not guarantee more whether normal the CPU that detects this module partly works.If spare module work itself is undesired, then can not accurately monitors main operating state, and start reliable the automatic switchover with module.
Summary of the invention:
The objective of the invention is to solve existing the problems referred to above in the prior art.The method that a kind of active and standby cross-connect module protectiveness automaticallyes switch is proposed for this purpose, the method comprising the steps of: detect the active and standby signal of exporting to each LIM with cross-connect module, testing result is reported webmaster, this testing result is represented the current active and standby working properly or inefficacy with cross-connect module, particularly, the main alarm of section layer appears if the part LIM of each LIM or appointment detects the signal of standby cross-connect module output, webmaster sends the one-level prompt alarm, represent that standby cross-connect module lost efficacy, the administrative unit alarm appears if the part LIM of each LIM or appointment detects the signal of standby cross-connect module output, and the main signal of exporting with cross-connect module is normal, represent that then this fault is not to be derived from active and standby upstream with cross-connect module, and only be derived from standby cross-connect module, webmaster sends the secondary prompt alarm, represent that standby cross-connect module lost efficacy, the administrative unit alarm appears if the part LIM of each LIM or appointment detects active and standby signal with cross-connect module output simultaneously, the upstream of then representing the autonomous standby cross-connect module of the source of trouble, webmaster sends three grades of prompt alarms, is expressed as other system failure; The active and standby operating state that detects the other side with cross-connect module mutually, when standby cross-connect module detects the master with the cross-connect module working state abnormal, standby cross-connect module automatically switches to the main cross-connect module of using by the cross complaint condition line, particularly, when standby cross-connect module detects main power supply of microprocessor with cross-connect module and is reduced to selected certain threshold value, standby cross-connect module automatically switches to the main cross-connect module of using by the cross complaint condition line, and master originally is set to standby cross-connect module with cross-connect module, and send the signal that original master was lost efficacy with cross-connect module, if standby cross-connect module detects main normal with the cross-connect module power supply of microprocessor, and it is unusual with the fixedly binary code that the cross-connect module microprocessor sends by detecting the master, thereby when determining that the master uses the cross-connect module microprocessor work undesired, standby cross-connect module also automatically switches to the main cross-connect module of using by the cross complaint condition line; Active and standbyly separately self operating state is detected with cross-connect module, the main cross-connect module of using is when discovery self working state abnormal, automatically this module is switched to standby cross-connect module by the cross complaint condition line, simultaneously original standby cross-connect module is switched to the main cross-connect module of using, particularly, the master detects other power supplys in this module with cross-connect module, the master detects with the stress state of cross-connect module to field programmable gate array in this module, the master detects with the state of cross-connect module to key chip in this module, and above-mentioned three testing results are reported microprocessor in this module, in case microprocessor finds that any one appearance in these three testing results is unusual, then the master automatically switches to standby cross-connect module by the cross complaint condition line immediately with cross-connect module, and original standby cross-connect module automatically switches to the main cross-connect module of using simultaneously.
In said method of the present invention, the described section main alarm of layer can be LOF, and described administrative unit alarm can be Administration unit alarm indication signal or Administration unit loss of pointer.
Utilize method of the present invention, can when breaking down, realize automaticallying switch fully, and can increase the stability of equipment and the reliability of switching.
Description of drawings
Fig. 1 is the schematic diagram of the various detection signal transmission directions that utilized in the inventive method;
Fig. 2 is the schematic diagram of the fault detection mechanism that adopted in the inventive method;
Fig. 3 is the electrical schematic diagram of the module status line of open collector NAND gate driving.
Embodiment
Below in conjunction with accompanying drawing, explain the know-why and the embodiment of the inventive method in detail.
Suppose that active and standby switching with module is to occur in the system stable operation process, only when the master catastrophic discontinuityfailure occurs with module, occur automaticallying switch.This moment, method of the present invention was before the action of automaticallying switch, guarantee that the spare module operating state is normal, the assurance spare module is understood main real-time working state with module at any time, guarantee to select rational fault location point, the priority level of automatic switchover is set, prevent misoperation, the stability of enhanced system, guarantee the output status signal of timely isolated failure module, the main influence with module so that spare module was not lost efficacy realizes normally switching.
For the problem of the operating state that solves spare module, guarantee that the spare module operating state is normal when taking place to automatically switch, we monitor active and standby real-time working state with cross-connect module by the third party.In the SDH system, each LIM is handled the back through overhead processing and pointer and is linked to each other with cross-connect module, realizes professional scheduling, its annexation such as Fig. 1 in cross-connect module.
In Fig. 1, thick line is depicted as active and standbyly exports to the signal of each LIM with cross-connect module, and this signal has the frame information of SDH.At the inlet of LIM, we carry out alarm detection.Each LIM reports telecommunications management network (tmn) with testing result, notifies the present active and standby operating state with cross-connect module of attendant (normal or inefficacy).The detection mechanism of each LIM is as follows: at first, if each LIM all detects the main alarm of signal appearance section layer that standby cross-connect module is come, for example LOF (LOF), webmaster provides the one-level prompt alarm, indicates standby cross-connect module to lose efficacy; Secondly, situation for the transmission network operate as normal, this means main at least working properly with module, transmitting all kinds of business in the network, administrative unit alarm occur if each LIM all detects the signal that standby cross-connect module comes this moment, for example Administration unit alarm indication signal (AU_AIS) or Administration unit loss of pointer (AU_LOP), and the main signal of sending here with cross-connect module is normal, show that then this fault is not to derive from active and standby upstream with cross-connect module, and only be to derive from standby cross-connect module, webmaster provides the secondary prompt alarm, indicates standby cross-connect module to lose efficacy; The administrative unit alarm occurs if detect the active and standby signal of sending here with cross-connect module simultaneously, show that then fault results from active and standby upstream with cross-connect module, provide three grades of prompt alarms, indicate other system failure.
If finding standby cross-connect module lost efficacy, one-level prompt alarm and secondary prompt alarm have promptly been found, the attendant must keep in repair as early as possible, guarantee normally in service, standby cross-connect module is working properly, and this point is the prerequisite that our back is about to the active and standby cross-connect module generation automatic switchover of discussion.
In module, only under microprocessor (CPU) situation working properly, could carry out correct real-time monitoring to the state of this module.Therefore, we select to influence the overall parameter of module operating state with in the mutual detection of module active and standby, such as the working power of CPU in the module and the CPU operating state monitoring parameter as antithesis module (active and standby with module antithesis) each other.For simplified design, in this link, we only consider spare module is under which kind of situation, " plunder right to work " (switch to main use module): when spare module detects the cpu power of leading with module and is reduced to certain threshold value (can select), this moment, main monitoring state with module self was insincere, and spare module becomes the master automatically and uses module, and master originally is set to spare module with module, realize " robbing the master " switching, and the prompting attendant changes the former main module of using of inefficacy; If it is normal that spare module detects main cpu power with module, this moment is by detecting the main fixedly binary code of sending here with module CPU, in case main cpu function with module is unusual, program counter misdirection etc. for example, spare module can't detect the binary code of rule, promptly think main and lost efficacy that spare module " robbing the master " takes place switches with module.
Under the situation that does not have above-mentioned fault, active and standbyly respectively the detection of self is only reliably with module.The main situation with module " power of walking off from one's job " of our consideration this moment: automatically this module is set to spare module, starting the antithesis module simultaneously is the main module of using: the detected state to other power supply (cpu power is by the antithesis detection) in the module reports the interior CPU of this module; The interior stress state to FPGA of module reports the CPU in this module; The interior state-detection to key chip of module reports the CPU in this module.In case one of above-mentioned condition is set up, main with module " walking off from one's job power " immediately, start automatically switch machine-processed.
In sum, testing mechanism is divided into three grades substantially, as shown in Figure 2.At first, highest-ranking is that each LIM is to active and standby status monitoring with cross-connect module.Notice that with thick line signal, this type of prompt alarm is to need attendant's manual intervention, guarantees that the operating state of active and standby usefulness module is normal among Fig. 2.Secondly, be cpu power state and the CPU operating state that antithesis detects, this condition line is illustrated with time thick line.At last, general rank is the status monitoring of module self.Back two-stage all can directly cause auto switching.
After three grades of fault detects, comprised the situation that module breaks down substantially, can realize correct change action, also depend on the motion mechanism of cross complaint.Just as mentioned before, when causing the condition line of primary module or cross complaint line output level between " 0 " and " 1 " because of certain fault, detect this fault point even if main backup module can be correct, and it is machine-processed to have started automatic switchover, also can't realize automaticallying switch, we will solve the primary module that breaks down and the isolating problem of the condition line between the spare module for this reason.
Here our output stage of the condition line between module substitutes common transistor gate (TTL) output with open collector NAND gate (OC) output.As shown in Figure 3, the condition line of module drives by open-collector OC door, draws power supply to be provided by the antithesis module on the collector electrode.During operate as normal, primary module control point A exports " 1 ", and condition line output " 0 " (in running order) is equipped with module controls point B output " 0 ", condition line output " 1 " (being in stand-by state).In case power-supply system operation irregularity in the primary module, the condition line of its output is because of drawing on the antithesis module (power-supply system is normal), and saltus step reliably is " 1 " (state of deactivating), spare module control point B automatically is set to " 1 ", make this module enter operating state, LIM just can carry out the switching of signal source according to the condition line after changing.Cross complaint line between the module also can adopt identical mechanism.
The description of above-mentioned embodiment is only to explain that operation principle of the present invention is a purpose, does not constitute limiting the scope of the invention.Protection scope of the present invention is limited by incidental claims.
Claims (2)
1. method that active and standby cross-connect module protectiveness automaticallyes switch comprises step:
Detect and active and standbyly export to the signal of each LIM with cross-connect module, testing result is reported webmaster, this testing result is represented current active and standby working properly or lost efficacy with cross-connect module,
Particularly, the main alarm of section layer appears if the part LIM of each LIM or appointment detects the signal of standby cross-connect module output, webmaster sends the one-level prompt alarm, represent that standby cross-connect module lost efficacy, the administrative unit alarm appears if the part LIM of each LIM or appointment detects the signal of standby cross-connect module output, and the main signal of exporting with cross-connect module is normal, represent that then this fault is not to be derived from active and standby upstream with cross-connect module, and only be derived from standby cross-connect module, webmaster sends the secondary prompt alarm, represent that standby cross-connect module lost efficacy, the administrative unit alarm appears if the part LIM of each LIM or appointment detects active and standby signal with cross-connect module output simultaneously, the upstream of then representing the autonomous standby cross-connect module of the source of trouble, webmaster sends three grades of prompt alarms, is expressed as other system failure;
Active and standbyly detect the other side's operating state mutually with cross-connect module, when standby cross-connect module detects mainly during with the cross-connect module working state abnormal, standby cross-connect module automatically switches to the main cross-connect module of using by the cross complaint condition line,
Particularly, when standby cross-connect module detects main power supply of microprocessor with cross-connect module and is reduced to selected certain threshold value, standby cross-connect module automatically switches to the main cross-connect module of using by the cross complaint condition line, and master originally is set to standby cross-connect module with cross-connect module, and send the signal that original master was lost efficacy with cross-connect module, if standby cross-connect module detects main normal with the cross-connect module power supply of microprocessor, and it is unusual with the fixedly binary code that the cross-connect module microprocessor sends by detecting the master, thereby when determining that the master uses the cross-connect module microprocessor work undesired, standby cross-connect module also automatically switches to the main cross-connect module of using by the cross complaint condition line;
Active and standbyly separately self operating state is detected with cross-connect module, the main cross-connect module of using is when discovery self working state abnormal, automatically this module is switched to standby cross-connect module by the cross complaint condition line, simultaneously original standby cross-connect module is switched to the main cross-connect module of using
Particularly, the master detects other power supplys in this module with cross-connect module, the master detects with the stress state of cross-connect module to field programmable gate array in this module, the master detects with the state of cross-connect module to key chip in this module, and above-mentioned three testing results are reported microprocessor in this module, in case microprocessor finds that any one appearance in these three testing results is unusual, then the master automatically switches to standby cross-connect module by the cross complaint condition line immediately with cross-connect module, and original standby cross-connect module automatically switches to the main cross-connect module of using simultaneously.
2. method according to claim 1, it is LOF that wherein said section layer mainly alarmed indication, described administrative unit alarm indication is Administration unit alarm indication signal or Administration unit loss of pointer.
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| CN 200410000921 CN1271819C (en) | 2004-01-15 | 2004-01-15 | Method for master and backup cross connection modules protection switching |
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| CN 200410000921 CN1271819C (en) | 2004-01-15 | 2004-01-15 | Method for master and backup cross connection modules protection switching |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011143876A1 (en) * | 2010-05-21 | 2011-11-24 | 中兴通讯股份有限公司 | Master/backup switching method and device for service nodes |
| CN101184319B (en) * | 2007-12-14 | 2012-08-29 | 上海华为技术有限公司 | Service resource distribution method and device |
| CN103095570A (en) * | 2013-01-11 | 2013-05-08 | 烽火通信科技股份有限公司 | Method for judging failure of cross module |
| CN103744755A (en) * | 2014-01-08 | 2014-04-23 | 烽火通信科技股份有限公司 | Implement system for primary and standby veneer single port shared protection and method thereof |
| CN105162454A (en) * | 2015-10-12 | 2015-12-16 | 索尔思光电（成都）有限公司 | Optical module, signal output port thereof and signal output port protection circuit |
| CN106534615A (en) * | 2016-11-18 | 2017-03-22 | 广东威创视讯科技股份有限公司 | Video signal processing apparatus and control method thereof |
| CN108804259A (en) * | 2018-06-14 | 2018-11-13 | 北京旅居四方科技有限公司 | Water power stake and the method and apparatus that program operation is detected |
| CN110850209A (en) * | 2019-11-15 | 2020-02-28 | 全球能源互联网研究院有限公司 | Monitoring control device and system for simulating commutation failure test |
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| CN105681186B (en) * | 2015-12-18 | 2018-12-25 | 瑞斯康达科技发展股份有限公司 | A kind of protection switching method and protection switching device |
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2004
- 2004-01-15 CN CN 200410000921 patent/CN1271819C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101184319B (en) * | 2007-12-14 | 2012-08-29 | 上海华为技术有限公司 | Service resource distribution method and device |
| WO2011143876A1 (en) * | 2010-05-21 | 2011-11-24 | 中兴通讯股份有限公司 | Master/backup switching method and device for service nodes |
| CN103095570A (en) * | 2013-01-11 | 2013-05-08 | 烽火通信科技股份有限公司 | Method for judging failure of cross module |
| CN103095570B (en) * | 2013-01-11 | 2015-07-15 | 烽火通信科技股份有限公司 | Method for judging failure of cross module |
| CN103744755A (en) * | 2014-01-08 | 2014-04-23 | 烽火通信科技股份有限公司 | Implement system for primary and standby veneer single port shared protection and method thereof |
| CN105162454A (en) * | 2015-10-12 | 2015-12-16 | 索尔思光电（成都）有限公司 | Optical module, signal output port thereof and signal output port protection circuit |
| CN105162454B (en) * | 2015-10-12 | 2020-04-28 | 索尔思光电（成都）有限公司 | Optical module and signal output port thereof, and signal output port protection circuit |
| CN106534615A (en) * | 2016-11-18 | 2017-03-22 | 广东威创视讯科技股份有限公司 | Video signal processing apparatus and control method thereof |
| CN106534615B (en) * | 2016-11-18 | 2019-07-12 | 广东威创视讯科技股份有限公司 | Apparatus for processing of video signals and its control method |
| CN108804259A (en) * | 2018-06-14 | 2018-11-13 | 北京旅居四方科技有限公司 | Water power stake and the method and apparatus that program operation is detected |
| CN110850209A (en) * | 2019-11-15 | 2020-02-28 | 全球能源互联网研究院有限公司 | Monitoring control device and system for simulating commutation failure test |
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