CN1756377A - Method for detecting single board fault - Google Patents
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- CN1756377A CN1756377A CN 200410080533 CN200410080533A CN1756377A CN 1756377 A CN1756377 A CN 1756377A CN 200410080533 CN200410080533 CN 200410080533 CN 200410080533 A CN200410080533 A CN 200410080533A CN 1756377 A CN1756377 A CN 1756377A
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Abstract
The invention discloses a method to detect single board fault, which comprises: the first single board in main and standby boards uses software heart-beat style to detect fault to second single board in main and standby boards; meantime, if finding any fault whatever software or hardware method, it determines the second single board produce fault. This method can detect the fault of main or standby board in time.
Description
Technical field
The present invention relates to fault detection technique, particularly relate to a kind of method that detects single board default.
Background technology
At present, along with the development and the application of software and hardware technology, telecom carrier-class device is gradually towards the high integration development, and the disposal ability of equipment veneer has obtained growth at double, veneer can be handled more traffic and the more traffic load of carrying, but the thing followed is exactly a safety issue.Traffic that veneer is carried when operate as normal and load are many more, and the service disconnection scope and the loss that are caused when breaking down of this veneer will be big more so.Therefore, reliability how to guarantee veneer is the key factor that telecom carrier-class device must be considered.In order to improve the reliability of equipment veneer, guarantee its operation steady in a long-term, a kind of common way is to adopt main usefulness/standby mode that the veneer of equipment is protected.Main usefulness/standby mode is that a veneer is used veneer as the master, is responsible for handling all loads, and the veneer that increases a redundancy simultaneously is responsible for the data of backup master with veneer as standby board.
Adopt main during with/standby backup mode, standby board with main with veneer detect mutually the other side ruuning situation.If the master detects standby board with veneer and breaks down, standby board then directly resets; If standby board detects the master and breaks down with veneer, then carry out board switchover and handle, system is switched on the standby board smoothly move, standby board continues the Business Processing process.Therefore, break down with standby board or the board switchover processing that resets accordingly, then can significantly reduce the influence degree of single board default, improve the reliability of veneer business service if can in time detect veneer.
Whether break down in order to detect veneer, prior art adopts the detection mode of software heartbeat.Define a communication link between veneer and the standby board main using in advance, and main time-out time with the timer that disposes in veneer and the standby board is set, when the timer timing arrives time-out time, then reclocking and trigger and mainly send a heartbeat message to the other side of timer with veneer and standby board.Fig. 1 is that prior art adopts software heartbeat mode to detect the flow chart whether veneer breaks down.Referring to Fig. 1, prior art adopts software heartbeat mode to realize that the detailed process of fault detect may further comprise the steps:
Step 101: main start with veneer and standby board after, start respectively and timer that initialization self is disposed;
Step 102: when the master arrives time-out time with the timer timing in the veneer, this timer reclocking, the master passes through predefined communication link to heartbeat message of standby board transmission with veneer simultaneously; When the timer timing in the standby board arrives time-out time, this timer reclocking, standby board sends a heartbeat message to main with veneer by predefined communication link simultaneously;
Here, be 1000ms such as the time-out time that timer is set, the master sends a heartbeat message to the other side at the timer operation 1000ms of self during the time respectively with veneer and standby board so;
Step 103: the master judges whether receive the heartbeat message that standby board is sent in setting-up time with veneer, if judge that then standby board is normal, otherwise judge the standby board fault;
Here, it can be the time-out time in N cycle that described setting-up time is promptly judged the time of whether breaking down, such as, the time-out time that timer has been set is 1000ms, the time-out time that then can setting-up time be set to 3 cycles, be 3000ms, the master judges whether receive the heartbeat message that standby board is sent in the time span of 3000ms with veneer so;
Step 104: standby board judges whether receive the main heartbeat message of sending with veneer in setting-up time, if judge that then the master is normal with veneer, otherwise judge the main single board default of using.
Need to prove that step 103 is carried out simultaneously with step 104, and do not have the sequencing of execution.
This shows that prior art only adopts software heartbeat mode to carry out fault detect to have following shortcoming:
When the master does not receive the other side's heartbeat message with veneer or standby board in setting-up time after, think that just the other side breaks down, and judge that the out of order time is that described setting-up time may be longer with the time phase difference that breaks down, therefore, can't in time detect the fault of veneer;
The software heartbeat testing process of prior art need realize that this software detection process is subjected to the influence of single board system ruuning situation inevitably by dispatcher software, causes in time detecting the fault of veneer.Such as, because the busy whole software heartbeat detection process that causes of system was not carried out in a period of time, so during this period of time, if fault has taken place veneer, system then can't in time detect the fault of veneer.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that detects single board default, so that in time detect the fault of veneer.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of method that detects single board default, this method comprises: the master adopts software heartbeat mode to carry out fault detect to main with second veneer in veneer and the standby board with first veneer in veneer and the standby board, first veneer adopts the hardware mode that reads the set oneself state value of second veneer that second veneer is carried out fault detect simultaneously, detect second veneer when breaking down when first veneer adopts in software heartbeat mode and the hardware mode any, judge that second veneer breaks down.
Described first veneer adopts the hardware mode that reads the set oneself state value of second veneer that second veneer is carried out fault detect, may further comprise the steps:
When A1, second veneer arrive setting-up time length in timing, according to the self-operating situation for normal status value or abnormality value are set self;
A2, first veneer read the state value that second veneer is provided with by external bus, and first veneer judges whether the current state value that reads is the abnormality value then, if, judge that then second veneer breaks down, otherwise, steps A 1 returned.
In steps A 1, described second veneer, may further comprise the steps for normal status value or abnormality value are set self according to the self-operating situation:
A11, second veneer are judged self whether normally operation, if, then in the register that sets in advance, write normal status value, otherwise write state value in register not;
A12, described register judge whether second veneer has write normal status value to self in predefined time span, if, then preserve this normal status value, otherwise, self state value is changed to the abnormality value.
In described steps A 2, after first veneer judges that the current state value that reads is the abnormality value, and before judging that second veneer breaks down, this method further comprises:
First veneer is judged when this timing arrives setting-up time length, self read the frequency threshold value whether number of times of the second veneer abnormality value equals to set in advance continuously, if then continue to carry out the step of judging that second veneer breaks down, otherwise return steps A 2.
This method further comprises: first veneer is provided with state parameter in self, the value of this state parameter comprises normal state or critical state, wherein, normal state is represented the normal status value that is that first veneer read when the last time timing arrives setting-up time length, critical state represents that first veneer read when timing last time arrives setting-up time length is the abnormality value;
In described steps A 2, after first veneer judges that the current state value that reads is the abnormality value, and before judging that first veneer breaks down, this method further comprises: whether first veneer is normal state according to the value of oneself state parameter, when judgement arrives setting-up time length in timing last time, whether the state value of second veneer that reads is normal status value, if, return steps A 1 after then the value of this state parameter being changed to critical state, otherwise, continue to carry out the step of judging that second veneer breaks down;
In described steps A 2, after second veneer judges that the current state value that reads is normal status value, and before returning steps A 1, this method further comprises: whether second veneer is normal state according to the value of oneself state parameter, judges whether the state value of second veneer that reads is normal status value when timing last time arrives setting-up time length, if, then directly return steps A 1, otherwise, steps A 1 returned after the value of this state parameter is changed to normal state.
Described first veneer is that main to use veneer, second veneer be standby board.
Described first veneer is a standby board, and second veneer is the main veneer of using.
Described first veneer adopts the hardware mode that reads the set oneself state value of second veneer that second veneer is carried out fault detect, may further comprise the steps:
B1, master use veneer when normal operation, and the state value of self operating enable signal is set to the master and uses attitude, and the state value of self operating enable signal when breaking down is set to standby attitude;
When B2, standby board arrive setting-up time length in timing, judge whether self is standby attitude by the state value that the master that external bus read operates enable signal with veneer, if, judge that then the master breaks down with veneer, otherwise, step B1 returned.
In described step B2, after standby board judges that main state value with veneer operation enable signal is standby attitude, and before judging that the master breaks down with veneer, this method further comprises: standby board judges whether the number of times that self to read main state value with veneer operation enable signal continuously be standby attitude equals predefined frequency threshold value, if, then continue to carry out the step of judging that the master breaks down with veneer, otherwise, step B1 returned.
As seen, the method for the present invention's proposition has the following advantages:
1, the present invention's mode of adopting software heartbeat and hardware heartbeat to combine realizes main with the fault detect between veneer and the standby board, as long as any mode wherein detects single board default, judge that all veneer breaks down, thereby can in time detect main fault with veneer or standby board; And, when the present invention adopts hardware heartbeat mode to detect single board default, main is to determine by the state value that reads in the external bus appropriate address whether the other side breaks down with veneer and standby board, and need not dispatcher software, its testing process can not be subjected to the influence of single board system ruuning situation, therefore, even software heartbeat mode can't be dispatched because system is busy, the present invention still can adopt hardware heartbeat mode to realize fault detect, thereby the system that further guaranteed in time detects the fault of veneer;
2, because when the master breaks down with veneer and does not in time detect its fault, can greatly increase the extent of damage to business service, therefore, the present invention has increased a kind of operation and has enabled (OE, OperationEnable) signal detecting mode realizes that standby board is to main detection with single board default, as long as any in software heartbeat, hardware heartbeat and the OE signal detecting mode detects the main single board default of using, judge that all the master breaks down with veneer, thereby guaranteed that system in time detects main fault with veneer.
Description of drawings
Fig. 1 is that prior art adopts software heartbeat mode to detect the flow chart whether veneer breaks down.
Standby board detected main flow chart with single board default when Fig. 2 was embodiments of the invention employing hardware heartbeat mode.
Standby board detected main preferable flow chart with single board default when Fig. 3 was embodiments of the invention employing hardware heartbeat mode.
The master detected the flow chart of standby board fault when Fig. 4 was embodiments of the invention employing hardware heartbeat mode with veneer.
Fig. 5 is that embodiments of the invention adopt the OE signal detecting mode to detect main flow chart with single board default.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is done detailed description further below in conjunction with drawings and the specific embodiments.
Adopt main during with/standby backup mode, prior art has only adopted a kind of mode of software heartbeat to carry out the fault detect of veneer, whether thereby can't in time detect veneer breaks down, the fault detect mode that the present invention has then adopted software heartbeat and hardware heartbeat to combine, use in veneer and the standby board running main, software heartbeat process fault detection and hardware heartbeat process fault detection carry out simultaneously, when wherein any mode detects veneer when breaking down, the present invention judges that then veneer breaks down.
It is identical with the implementation procedure of prior art that the present invention adopts software heartbeat mode to carry out the process that single board default detects.
Adopt hardware heartbeat mode to realize the process that single board default detects below in conjunction with a specific embodiment explanation the present invention.
In the present embodiment, in leading, register and hardware heartbeat detection timer are set all in advance with veneer and standby board, and the time-out time that hardware heartbeat detection timer is set is 500ms, promptly when the timing of hardware heartbeat detection timer arrives 500ms, this timer reclocking also triggers veneer is provided with self register according to the self-operating situation state value.Here, the time-out time of hardware heartbeat detection timer is set to 500ms, an instantiation of enumerating for convenience of description just, and the time-out time of hardware heartbeat detection timer can be set to other time span according to actual needs.
Standby board detected main flow chart with single board default when Fig. 2 was embodiments of the invention employing hardware heartbeat mode.Referring to Fig. 2, present embodiment adopts hardware heartbeat mode to realize that standby board detects main detailed process with single board default and may further comprise the steps:
Step 201: main with after veneer and the standby board startup, main register and hardware heartbeat detection timer with single board starting and initialization self;
Here, main register with veneer initialization self is meant, leads with veneer the state value of self register is changed to normal status value 1; Initiating hardware heartbeat detection timer is meant, mainly makes self hardware heartbeat detection timer zero clearing and picks up counting with veneer;
Step 202: when the master arrives time-out time 500ms with hardware heartbeat detection timer timing in the veneer, this timer reclocking, and trigger main with veneer detection self-operating situation;
Step 203: main detect the self-operating situation with veneer, if normal operation then mainly writes normal status value 1 with veneer in self register, if break down, then the master is with veneer write state value in self register not;
Step 204: the master judges in predefined time span with the register in the veneer, time-out time such as 2 timers is in the 1000ms, whether lead with veneer to self having write normal status value 1, if, the normal status value 1 that writes with veneer of register holds master then, otherwise register is changed to abnormality value 0 with the state value of self automatically;
Step 205: standby board reads the main state value of using in the board register by external bus, judges whether this state value that reads is normal status value 1, if, then return step 202, otherwise, execution in step 206;
Here, standby board is after the state value that reads is abnormality value 0, not judging directly that the master breaks down with veneer, is execution in step 206 but read main once more with the state value in the board register, is to take place owing to the holding wire shake causes the situation of reading state value mistake in order to prevent;
Step 206: standby board reads the main state value of using in the board register by external bus once more, judges whether this state value that reads is 1, if, then return step 202, otherwise, judge that the master breaks down with veneer, finish the flow process of current detection master with single board default.
As seen, present embodiment is to guarantee that the state value that standby board reads is correct, when this hardware heartbeat detection timer timing arrives time-out time, standby board is an abnormality value 0 at the double state value that reads, after the frequency threshold value that promptly reads the abnormality value continuously is twice, just can judges and mainly break down with veneer.In other embodiment beyond the present embodiment, other frequency threshold value also can be set, such as, when the timing of hardware heartbeat detection timer arrives time-out time, after standby board 1 time or the continuous state value that reads for 3 times are abnormality value 0, judge and mainly breaks down with veneer.
Preferably, in order further to prevent when this hardware heartbeat detection timer timing arrives time-out time, cause the generation of the continuous reading state value of standby board error situation owing to the holding wire shake, guarantee that the state value that standby board reads is correct, present embodiment also can be with reference to when hardware heartbeat detection timer timing last time arrives time-out time, the main state value with register in the veneer that standby board read, this state value is to preserve by a state parameter status who sets in advance in standby board.
Standby board detected main preferable flow chart with single board default when Fig. 3 was embodiments of the invention employing hardware heartbeat mode.Referring to Fig. 3, with reference to when hardware heartbeat detection timer timing last time arrives time-out time, the state value that standby board read, realize that standby board detects main process with single board default and may further comprise the steps:
Step 301～step 304 is identical with step 201～step 204;
Step 305: standby board reads the main state value of using in the board register by external bus, judges whether this state value that reads is normal status value 1, if, then return step 302, otherwise, execution in step 306;
Step 306: standby board reads the main state value of using in the board register by external bus once more, judges whether this state value that reads is 1, if then execution in step 307, otherwise, direct execution in step 308;
Here, standby board is after having read state value continuous 2 times, do not judge directly whether the master breaks down with veneer, but the value of the parameter s tatus that the standby board judgement self is preserved in continuation execution in step 307 or the step 308, be to be used to preserve last time hardware heartbeat detection timer timing when arriving time-out time, the state value that standby board read, the i.e. value of status in order to upgrade, and, main whether breaking down with veneer made judgement with reference to the value of this status;
Step 307: standby board judges whether the value of the status that self preserves is normal state, if then directly return step 302, otherwise standby board returns step 302 after the value of this status is changed to critical state;
Step 308: standby board judges whether the value of the status that self preserves is normal state, if then standby board returns step 302 after the value of this status is changed to critical state, otherwise, execution in step 309;
Here, if the value of status is a normal state, promptly the state value that standby board is read when hardware heartbeat detection timer timing last time arrives time-out time is a normal status value 1, so, though when this hardware heartbeat detection timer timing arrives time-out time, the state value that standby board read is the abnormality value, do not break down with veneer but still think main, must upgrade the value of status, the value of status is changed to critical state, when arriving time-out time for next hardware heartbeat detection timer timing, standby board is judged provides foundation;
If the value of status is a critical state, promptly the state value that standby board is read when hardware heartbeat detection timer timing last time arrives time-out time is an abnormality value 0, so, at this moment, standby board is when last time and this hardware heartbeat detection timer timing arrival time-out time, the state value that is read is abnormality value 0, then the decidable master to break down with veneer be execution in step 309;
Step 309: standby board judges that the master breaks down with veneer.
The master detected the flow chart of standby board fault when Fig. 4 was embodiments of the invention employing hardware heartbeat mode with veneer.Referring to Fig. 4, adopt hardware heartbeat mode to realize that main detailed process and above-mentioned employing hardware heartbeat mode shown in Figure 3 with veneer detection standby board fault realizes that the main detailed process with single board default of standby board detection is identical, just carrying out the veneer that detects is that the master uses veneer, and detected veneer is a standby board.
Need to prove that in the present invention, it is that step 301 is that step 401 is carried out simultaneously to step 409 to step 309 with main process with veneer detection standby board that above-mentioned standby board detects main process with single board default, and does not have the sequencing of execution.
So far, the present invention has finished and has adopted hardware heartbeat mode to realize the process of fault detect.
Preferably, because in time detecting main breaking down with veneer is to reduce single board default to the most important factor of the business service extent of damage, and, on leading, have a kind of hardware signal with veneer, the OE signal, therefore, the present invention has increased the process that a kind of OE signal detecting mode is realized the main usefulness of standby board detection single board default.Because the OE signal is a hardware signal, therefore, the OE signal detecting mode also is a kind of hardware detection mode.Here, the OE signal exists only in main with on the veneer, and its state value is main with attitude or standby attitude, wherein, the master represents normal status value with attitude, and the OE signal then was the main attitude of using when the master normally moved with veneer, standby attitude is represented the abnormality value, and the OE signal then was standby attitude when the master broke down with veneer.
Use in veneer and the standby board running main, standby board uses software heartbeat fault detect mode, hardware heartbeat fault detect mode and OE signal detecting mode to detect with veneer main simultaneously, any mode therein detects main when breaking down with veneer, and the present invention judges and mainly breaks down with veneer.
Adopt the OE signal detecting mode to realize that standby board detects main process with single board default below in conjunction with a specific embodiment explanation the present invention.In the present embodiment, an OE input timer is set in standby board in advance, the time-out time that this timer is set simultaneously is 1000ms.And,, judge to lead and break down with veneer in that standby board is continuous when detecting main OE signal condition value with veneer for 5 times and being standby attitude.In other embodiment beyond the present embodiment, also can set other the time-out time and the frequency threshold value of continuous detecting.
Fig. 5 is that embodiments of the invention adopt the OE signal detecting mode to detect main flow chart with single board default.Referring to Fig. 5, present embodiment realizes that standby board detects the main detailed process that whether breaks down with veneer and may further comprise the steps:
Step 501: main when use single board starting, the state value of self OE signal is set to lead uses attitude;
Here, main during with single board starting the state value of self OE signal be set to the main attitude of use, if mainly normally move with veneer always, then the state value of OE signal remains the master and uses attitude, if main break down with veneer, main with veneer then the state value of self OE signal be set to standby attitude;
Step 502: when standby board starts, start the also OE input timer of initialization self;
Step 503: when the timing of OE input timer arrived time-out time 1000ms, standby board read main state value with OE signal in the veneer by external bus;
Step 504: standby board judges whether the state value of the OE signal that this reads is standby attitude,
If then execution in step 505, otherwise, step 503 returned;
Step 505: standby board judges whether the number of times that reads standby attitude continuously is 5, if then execution in step 506, otherwise, return step 503;
Step 506: judge that the master breaks down with veneer, and finish the flow process of current detection master with single board default.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.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 (9)
1, a kind of method that detects single board default, it is characterized in that, the master adopts software heartbeat mode to carry out fault detect to main with second veneer in veneer and the standby board with first veneer in veneer and the standby board, first veneer adopts the hardware mode that reads the set oneself state value of second veneer that second veneer is carried out fault detect simultaneously, detect second veneer when breaking down when first veneer adopts in software heartbeat mode and the hardware mode any, judge that second veneer breaks down.
2, method according to claim 1 is characterized in that, described first veneer adopts the hardware mode that reads the set oneself state value of second veneer that second veneer is carried out fault detect, may further comprise the steps:
When A1, second veneer arrive setting-up time length in timing, according to the self-operating situation for normal status value or abnormality value are set self;
A2, first veneer read the state value that second veneer is provided with by external bus, and first veneer judges whether the current state value that reads is the abnormality value then, if, judge that then second veneer breaks down, otherwise, steps A 1 returned.
3, method according to claim 2 is characterized in that, in steps A 1, described second veneer, may further comprise the steps for normal status value or abnormality value are set self according to the self-operating situation:
A11, second veneer are judged self whether normally operation, if, then in the register that sets in advance, write normal status value, otherwise write state value in register not;
A12, described register judge whether second veneer has write normal status value to self in predefined time span, if, then preserve this normal status value, otherwise, self state value is changed to the abnormality value.
4, method according to claim 2 is characterized in that, in described steps A 2, after first veneer judges that the current state value that reads is the abnormality value, and before judging that second veneer breaks down, this method further comprises:
First veneer is judged when this timing arrives setting-up time length, self read the frequency threshold value whether number of times of the second veneer abnormality value equals to set in advance continuously, if then continue to carry out the step of judging that second veneer breaks down, otherwise return steps A 2.
5, method according to claim 2, it is characterized in that, this method further comprises: first veneer is provided with state parameter in self, the value of this state parameter comprises normal state or critical state, wherein, normal state is represented the normal status value that is that first veneer read when the last time timing arrives setting-up time length, critical state represents that first veneer read when timing last time arrives setting-up time length is the abnormality value;
In described steps A 2, after first veneer judges that the current state value that reads is the abnormality value, and before judging that first veneer breaks down, this method further comprises: whether first veneer is normal state according to the value of oneself state parameter, when judgement arrives setting-up time length in timing last time, whether the state value of second veneer that reads is normal status value, if, return steps A 1 after then the value of this state parameter being changed to critical state, otherwise, continue to carry out the step of judging that second veneer breaks down;
In described steps A 2, after second veneer judges that the current state value that reads is normal status value, and before returning steps A 1, this method further comprises: whether second veneer is normal state according to the value of oneself state parameter, judges whether the state value of second veneer that reads is normal status value when timing last time arrives setting-up time length, if, then directly return steps A 1, otherwise, steps A 1 returned after the value of this state parameter is changed to normal state.
6, method according to claim 1 is characterized in that, described first veneer is that main to use veneer, second veneer be standby board.
7, method according to claim 1 is characterized in that, described first veneer is a standby board, and second veneer is the main veneer of using.
8, method according to claim 7 is characterized in that, described first veneer adopts the hardware mode that reads the set oneself state value of second veneer that second veneer is carried out fault detect, may further comprise the steps:
B1, master use veneer when normal operation, and the state value of self operating enable signal is set to the master and uses attitude, and the state value of self operating enable signal when breaking down is set to standby attitude;
When B2, standby board arrive setting-up time length in timing, judge whether self is standby attitude by the state value that the master that external bus read operates enable signal with veneer, if, judge that then the master breaks down with veneer, otherwise, step B1 returned.
9, method according to claim 8, it is characterized in that, in described step B2, after standby board judges that main state value with veneer operation enable signal is standby attitude, and before judging that the master breaks down with veneer, this method further comprises: standby board judges whether the number of times that self to read main state value with veneer operation enable signal continuously be standby attitude equals predefined frequency threshold value, if, then continue to carry out the step of judging that the master breaks down with veneer, otherwise, return step B1.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145986B (en) * | 2007-06-18 | 2011-04-20 | 中兴通讯股份有限公司 | A communication status detection method for boards in communication system |
| CN101111044B (en) * | 2007-08-22 | 2010-06-09 | 中兴通讯股份有限公司 | Mobile communications network management system and method for diagnosing base station veneer |
| CN101159685B (en) * | 2007-11-01 | 2011-03-02 | 中兴通讯股份有限公司 | Method of starting pluggable member |
| CN106649168A (en) * | 2015-10-29 | 2017-05-10 | 佛山市顺德区顺达电脑厂有限公司 | Method for judging whether hot swap happens or not |
| CN106649168B (en) * | 2015-10-29 | 2019-11-26 | 佛山市顺德区顺达电脑厂有限公司 | Judge whether the method for generation hot plug |
| CN108121632A (en) * | 2016-11-30 | 2018-06-05 | 中兴通讯股份有限公司 | A kind of guard method of one-board power supply and device |
| CN106789306A (en) * | 2016-12-30 | 2017-05-31 | 深圳市风云实业有限公司 | Restoration methods and system are collected in communication equipment software fault detect |
| CN106897177A (en) * | 2017-02-21 | 2017-06-27 | 惠州Tcl移动通信有限公司 | A kind of method and system based on mobile terminal system of fingerprints short-circuit detecting and protection |
| CN109634260A (en) * | 2018-12-18 | 2019-04-16 | 安徽江淮汽车集团股份有限公司 | Method and system are monitored online in vehicle control device |
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| Publication number | Publication date |
|---|---|
| CN100584051C (en) | 2010-01-20 |
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