CN101232406A - OAM fast detecting method, apparatus and system - Google Patents
OAM fast detecting method, apparatus and system Download PDFInfo
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- CN101232406A CN101232406A CNA200710073137XA CN200710073137A CN101232406A CN 101232406 A CN101232406 A CN 101232406A CN A200710073137X A CNA200710073137X A CN A200710073137XA CN 200710073137 A CN200710073137 A CN 200710073137A CN 101232406 A CN101232406 A CN 101232406A
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Abstract
The invention discloses a method, a device and a system for OAM rapid detection in a communication field, which can judge the OAM detection message of a device to be detected in a specified time, start the OAM rapid detection according to the judgment result to reduce time for OAM failure detection, enhance the function of OAM link detection and prevent loss of a large amount data of communication business.
Description
Technical field
The present invention relates to the communications field, particularly a kind of methods, devices and systems of OAM fast detecting.
Background technology
OAM (the Operations of IEEE802.3AH standard, Adminiistration, and Maintenance, operation, management, safeguard) be mainly used in the link state that monitors, as long-range inefficacy indication, and the control of long-range loopback, and please can be used in the health status of monitoring network, location link failure and malfunction provide to be used in more high-rise data link layer mechanism fast.OAM information adopts the low speed frame that is called OAMPDUS (OAM Protocol Data Units, Operations, Administration and Maintenance protocol Data Unit) to transmit.
OAMPDUs has comprised suitable control and state information, is used for monitoring, test and fault detect.OAMPDUs realizes a link detecting function end to end.
OAM is the agreement of a point-to-point, comprises following content:
Discovery: how to use OAM to find the equipment relevant with notice
Information such as the state on Link monitoring:Ethernet network chain road and attribute
Remote fault detection: how to detect with handle link and interrupt or other faults
Remote loopback: how by sending whether loopback of link that test packet tests segmentation
MIB variable retrieval: how from management information bank, to obtain relevant mib information
Organization specific enhancements: the method that privately owned expansion is provided
At present, OAM detects the scheme of having issued according to IEEE, has defined contents such as the various states that agreement needs, process, message structure, is a standard agreement that can carry out actual exploitation, satisfies the basic testing process that OAM detects.In the prior art, realize the process that OAM detects:
1, equipment 1 is consulted with equipment 2, consults successfully then to start OAM and detects;
2, equipment 1 and equipment 2 respectively per second send out Information PDU one or more and keep Link State, if equipment 1 is received the other side's the Information PDU that shakes hands, show that then link is normal, continue to send the Information PDU that shakes hands and detect;
Link State just is set is fault if 3 equipment 1 continuous 5 seconds (can change) can not receive the other side's the Information PDU that shakes hands, and initiates negotiations process again.
At present, the duration of OAM detection failure is 5 seconds, and this time concerning some is used is oversize, and when data rate arrived gigabit, defective sensitive time length was being represented losing of mass data.More and more important feature of the network equipment is that requirement is carried out fast detecting to communication failure between the adjacent system, can set up replaceable channel faster like this when breaking down or be switched to other links.
Summary of the invention
Embodiments of the invention provide the methods, devices and systems of OAM fast detecting, to solve the long problem that causes mass data to be lost current OAM detection time.
The embodiment of the invention discloses a kind of method of operation management maintain pattern OAM fast detecting, comprising:
Steps A, device A sends the OAM detect-message to equipment B, judges whether described device A receives that in first blanking time OAM detects handshake information;
Step B detects handshake information if receive described OAM, repeats described steps A;
Step C, do not detect handshake information if receive described OAM, in second blanking time less than described first blanking time, described device A sends an at least OAM fast detecting message with the 3rd blanking time to described equipment B, and described the 3rd blanking time is less than described second blanking time; When described device A in described second blanking time, do not receive when OAM that described equipment B is returned detects handshake information soon, the OAM detection failure is set.
The embodiment of the invention also discloses a kind of device of OAM fast detecting, comprising:
Fast detecting start unit: when being used for equipment to be detected and not receiving that OAM detects handshake information at interval, start the fast detecting timer, notify equipment to be detected to send OAM fast detecting message and detect in the very first time;
Fast detecting timer: be used to set time less than OAM fast detecting at interval of the described very first time;
Fast detecting judging unit: be used for after described fast detecting start unit starts described fast detecting timer, judge whether described equipment to be detected receives OAM fast detecting handshake information in the time that described fast detecting timer is set;
Fast detecting is handled the unit: be used for handling according to the result of described fast detecting judgment unit judges, when described fast detecting judgment unit judges when receiving described OAM fast detecting handshake information, stop described fast detecting timer and notify described equipment to be detected to stop to send described OAM fast detecting message, recovering normal OAM detects, when described fast detecting judgment unit judges when not receiving described OAM fast detecting handshake information, the OAM detection failure is set.
In addition, the embodiment of the invention also discloses a kind of system of OAM fast detecting, comprise device A to be detected, equipment B, also comprise:
Fast detecting start unit: be used for device A to be detected and in very first time interval, do not receive when the OAM of equipment B transmission to be detected detects handshake information, start the fast detecting timer, notify described device A to be detected to send OAM fast detecting message and detect;
The fast detecting timer; Be used to set time less than OAM fast detecting at interval of the described very first time;
Fast detecting judging unit: be used for after described fast detecting start unit starts described fast detecting timer, judge whether described device A to be detected receives described OAM fast detecting handshake information in the time that described fast detecting timer is set;
Fast detecting is handled the unit: be used for handling according to the result of described fast detecting judgment unit judges, when described fast detecting judgment unit judges is the described OAM fast detecting handshake information of receiving that described equipment B sends, stop described fast detecting timer and notify described device A to be detected to stop to send described OAM fast detecting message, recovering normal OAM detects, when described fast detecting judgment unit judges during, the OAM detection failure is set for the described OAM fast detecting handshake information of not receiving that described equipment B sends.
Embodiments of the invention detect detect-message by judging equipment to be detected OAM in setting-up time, and start the OAM fast detecting according to the result who judges, shorten the time of OAM fault detect, strengthened the function of OAM link detecting, avoided losing of communication service mass data.
Description of drawings
Fig. 1 is the embodiment schematic flow sheet of the embodiment of the invention about the OAM method for quick.
Fig. 2 is the schematic diagram of the embodiment of the invention about expansion content in the expansion OAM detect-message cell.
Fig. 3 is the example structure schematic diagram of the embodiment of the invention about the OAM device for fast detecting.
Fig. 4 is the example structure schematic diagram of the embodiment of the invention about the OAM rapid detection system.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below will the present invention program be described in more detail for embodiment and with reference to accompanying drawing.
Because the duration of OAM detection failure is 5 seconds at present, when data rate arrived gigabit, defective sensitive time length was being represented losing of mass data.In order to strengthen the reliability of network, require communication failure between the adjacent system is carried out fast detecting, can set up replaceable channel faster or be switched to other links when breaking down.
The basic thought of the embodiment of the invention is on the ieee standard basis, increases the function of 2 layers of link failure of OAM fast detecting on equipment disposition.,, may exist under the link failure situation after one second in sense cycle, adopt the method for quick time convergence to come detection failure if do not receive the OAM detection messages of opposite end.Promptly when local terminal is not received the OAMPDUs of opposite equip., shorten and give out a contract for a project the time, detect fast.After opposite equip. receives the message that requires to make an immediate response, send response message to local terminal immediately, for example ECHO mode etc.Specifically can adopt the cell of TLV in the expansion OAMPDUs, define the OAMPDUs that this cell is a fast detecting.According to the protocol conformance that defines between the equipment, if local terminal equipment receives the quick response message in opposite end, think that then the state of link is normal, both sides come back to normally and give out a contract for a project the time interval, otherwise think the abnormal state of link.For example: if the opposite end was sent out a message in one second, not receive the average time of probe message be exactly 1 second to local terminal like this, when not responding, (this time length can freely dispose as the case may be to start 100 milliseconds, as being 98 milliseconds, 103 milliseconds etc.) the speed of giving out a contract for a project, if amount to the not response of 5 bags, then judge communication failure.Like this, be exactly mean time to detection between 1 second～2 seconds.
The situation of docking with opposite equip. B with the local terminal device A is an example below, and the mode of specific implementation is described:
With reference to figure 1, Fig. 1 is an OAM method for quick embodiment schematic flow sheet of the present invention.
Step 1: the device A per second is sent out an Information PDU and is kept Link State, and starts 1100 milliseconds of timers;
After device A and equipment B were consulted successfully, the device A per second was sent out an Information PDU and is kept Link State, started 1100 milliseconds of timers; Here setting 1100 milliseconds of timers is in order to prevent the transmission lag shake, so enlarge 100 milliseconds, as the case may be different settings can also to be arranged certainly, for example being set to 1010 timers, 1099 timers, 1101 timers, 1199 timers etc.Equipment B can send an Information PDU who shakes hands after receiving Information PDU.
Whether step 2: judgment device A receives the Information PDU that shakes hands the opposite end in 1100 milliseconds, if receive, then execution in step 1; If do not receive the Information PDU that opposite equip. B shakes hands behind 1100 milliseconds of timer expiries, then execution in step 3;
Step 3: start the fast detecting timer, per 100 milliseconds send fast detecting detection Information PDU one time;
Device A is behind 1100 milliseconds of timer expiries, do not receive the InformationPDU that shakes hands of opposite equip. B, device A then starts 500 milliseconds, and (these 500 milliseconds is 1/2nd of 1000 milliseconds of time intervals, do with explanation as most preferred embodiment) timer, per 100 milliseconds (these 100 milliseconds is described 500 milliseconds 1/5th, do with explanation as most preferred embodiment) send fast detecting Information PDU, detect opposite equip. B and in 500 milliseconds, whether can send the Information PDU that shakes hands to device A;
Wherein, being set to 500 milliseconds of timers is for fast detecting OAM current state, shorten the time of detecting, so 500 milliseconds of just preferred embodiments of the method for the invention, can also carry out different settings as the case may be, as to be set to 400 milliseconds of timers, 490 milliseconds of timers, 530 milliseconds of timers and 600 milliseconds of timers etc. all be the scope of scheme of the present invention; Accordingly, the time period that sends fast detecting Information PDU also can be adjusted to 80 milliseconds, 95 milliseconds, 106 milliseconds and 120 milliseconds etc.; Certainly, above-mentioned 400 milliseconds of timers are divided into 5 sections, InformationPDU of per 80 milliseconds of transmissions also is preferred embodiment of the present invention, also 400 milliseconds of timers 4 sections or 6 sections be can be divided into, detection and judgement more than 2 times or 2 times promptly in the time that the fast detecting timer is set, carried out.In a word, give out a contract for a project the time purpose that detects fast, the content that all belongs to technical solution of the present invention and contained as long as can reach to shorten; Like this, by what OAM was detected time qualified in 500 milliseconds, shortened the time that OAM detects link failure, reduced the quantity that barrier for some reason causes obliterated data accordingly.
And, because will start 500 milliseconds of timers carries out fast detecting, it is different with the Information PDU that sends when detecting under the normal condition that the Information PDU that shakes hands fast of quick Information PDU that device A sends and equipment B needs, which can identify is normal detect-message to equipment B like this, and which needs fast detecting message.Preferred embodiment of the present invention realizes that above-mentioned differentiation is to realize by the method for expanding Information TLV.As realizing that by the content among the expansion Information TLV# 3 information of concrete expansion can adopt the content in Fig. 2 form; Certainly, above-mentioned extended method only is the preferred embodiment in the embodiment of the invention, the content information of other expansion Information TLV and expansion, or the method for other difference quick response Information PDU and normal response Information PDU belongs within the scope of claim of the present invention and equivalent technologies thereof;
Step 4: judge whether device A to be detected receives the fast detecting handshake information that the opposite end sends in fast detecting timer setting-up time, if device A is received the Information PDU response message of shaking hands fast of equipment B in 500 milliseconds, then execution in step 1; If do not receive the Information PDU response message of shaking hands fast of equipment B, then execution in step 5.
Step 5: the OAM detection failure is set.
With reference to figure 3, Fig. 3 is the structure chart of the embodiment of the invention about the device of OAM fast detecting, comprising:
Fast detecting start unit: when being used for equipment to be detected and not receiving that OAM detects handshake information at interval, start the fast detecting timer, notify equipment to be detected to send OAM fast detecting message and detect in the very first time;
For example device A and equipment B are carried out the OAM detection, and device A and equipment B are after consulting successfully, and the device A per second is sent out an Information PDU and kept Link State, and start 1100 milliseconds of timers of reception; Here setting 1100 milliseconds of timers is in order to prevent the transmission lag shake, so enlarge 100 milliseconds, as the case may be different settings can also to be arranged certainly, for example being set to 1010 timers, 1099 timers, 1101 timers, 1199 timers etc.Equipment B can be sent out an Information PDU who shakes hands by per second after receiving Information PDU.If behind 1100 milliseconds of timer expiries, do not receive the Information PDU that opposite equip. B shakes hands, the fast detecting start unit starts OAM fast detecting timer, and the cell of expansion Information PDU, with the InformationPDU that to identify this Information PDU be fast detecting, for example realize that by the content among the expansion Information TLV# 3 information of concrete expansion can adopt the content in Fig. 2 form; Certainly, above-mentioned extended method only is the preferred embodiment in the embodiment of the invention, the content information of other expansion Information TLV and expansion, or the method for other difference quick response Information PDU and normal response Information PDU belongs within the scope of claim of the present invention and equivalent technologies thereof; And (these 100 milliseconds is described 500 milliseconds 1/5th to per 100 milliseconds of fast detecting start unit, do with explanation as most preferred embodiment) announcement apparatus A transmission fast detecting Information PDU message, whether monitoring opposite equip. B returns to the Information PDU that device A is shaken hands in 500 milliseconds; Certainly, above-mentioned 500 milliseconds of timers are divided into 4 sections, per 125 milliseconds of timers send an Information PDU, 500 milliseconds of timers can also be divided into 6 sections, 7 sections etc., promptly in the time that the fast detecting timer is set, carry out detection at least once and judge it all is within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also be intended to comprise these change and modification interior.In a word, give out a contract for a project the time purpose that detects fast, the content that all belongs to technical solution of the present invention and contained as long as can reach to shorten; Like this, by what OAM was detected time qualified in 500 milliseconds, shortened the time that OAM detects link failure, reduced the quantity that barrier for some reason causes obliterated data accordingly.
Fast detecting timer: be used to set time less than OAM fast detecting at interval of the described very first time;
The time that OAM fast detecting timer is set can (these 500 milliseconds be 1/2nd of 1000 milliseconds of time intervals for 500 milliseconds, do with explanation as most preferred embodiment), wherein, being set to 500 milliseconds of timers is for fast detecting OAM current state, shorten the time of detecting, so 500 milliseconds of just preferred embodiments of the method for the invention, can also carry out different settings as the case may be, as be set to 400 milliseconds of timers, 490 milliseconds of timers, 530 milliseconds of timers and 600 milliseconds of timers etc. and all can realize scheme of the present invention; Accordingly, the time period that sends fast detecting Information PDU also can be adjusted to 80 milliseconds, 95 milliseconds, 106 milliseconds and 120 milliseconds etc.
Fast detecting judging unit: be used for behind fast detecting timer shown in the described fast detecting start unit startup, judge whether described equipment to be detected receives OAM fast detecting handshake information in the time that described fast detecting timer is set;
For example whether judgment device A receives the fast detecting of the equipment B Information PDU message of shaking hands in the time that 500 milliseconds of timers are set.
Fast detecting is handled the unit: be used for handling according to the result of described fast detecting judgment unit judges, when described fast detecting judgment unit judges when receiving described OAM fast detecting handshake information, stop described fast detecting timer and notify described equipment to be detected to stop to send described OAM fast detecting message, recovering normal OAM detects, when described fast detecting judgment unit judges when not receiving described OAM fast detecting handshake information, the OAM detection failure is set;
For example fast detecting judgment unit judges device A is received fast detecting Information PDU message in 500 milliseconds of timer setting-up times, then stop the OAM fast detecting, stop 500 milliseconds of fast detecting timers, and notify described device A to be detected to stop to send described OAM fast detecting message; If device A is not received fast detecting Information PDU message in 500 milliseconds of timer setting-up times, the OAM detection failure is set.
With reference to figure 4, this figure is the system construction drawing of OAM fast detecting of the present invention, comprises device A to be detected, equipment B, also comprises:
Fast detecting start unit: be used for device A to be detected and in very first time interval, do not receive when the OAM of equipment B transmission to be detected detects handshake information, start the fast detecting timer, notify described device A to be detected to send OAM fast detecting message and detect;
The fast detecting timer; Be used to set time less than OAM fast detecting at interval of the described very first time;
Fast detecting judging unit: be used for after described fast detecting start unit starts described fast detecting timer, judge whether described device A to be detected receives described OAM fast detecting handshake information in the time that described fast detecting timer is set;
Fast detecting is handled the unit: be used for handling according to the result of described fast detecting judgment unit judges, when described fast detecting judgment unit judges is the described OAM fast detecting handshake information of receiving that described equipment B sends, stop described fast detecting timer and notify described device A to be detected to stop to send described OAM fast detecting message, recovering normal OAM detects, when described fast detecting judgment unit judges during, the OAM detection failure is set for the described OAM fast detecting handshake information of not receiving that described equipment B sends.
The embodiment of the system of OAM fast detecting of the present invention can be with reference to the embodiment of the device of above-mentioned OAM fast detecting, the implementation procedure that its fast detecting timer, fast detecting start unit, fast detecting judging unit, fast detecting are handled the unit is identical with the enforcement of the device of above-mentioned OAM fast detecting, does not repeat them here.
Embodiments of the invention detect detect-message by judging equipment to be detected OAM in setting-up time, and start the OAM fast detecting according to the result who judges, shorten the time of OAM fault detect, strengthened the function of OAM link detecting, avoided losing of communication service mass data.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the method that detects of an OAM is characterized in that:
Steps A, device A sends the OAM detect-message to equipment B, judges whether described device A receives that in first blanking time OAM detects handshake information;
Step B detects handshake information if receive described OAM, repeats described steps A;
Step C, do not detect handshake information if receive described OAM, in second blanking time less than described first blanking time, described device A sends an at least OAM fast detecting message with the 3rd blanking time to described equipment B, and described the 3rd blanking time is less than described second blanking time; When described device A in described second blanking time, do not receive when OAM that described equipment B is returned detects handshake information soon, the OAM detection failure is set.
2. the method that OAM according to claim 1 detects is characterized in that this method further comprises: the content of expansion OAM detect-message cell, the OAM detect-message after the expansion is carried out described OAM fast detecting as OAM fast detecting message.
3. the method that OAM according to claim 1 detects is characterized in that: described second time interval is 1/2nd of described very first time interval, and described the 3rd time interval is 1/5th of described second time interval.
4. the method that OAM according to claim 1 detects is characterized in that:
Be 1 second described first blanking time, and be 500 milliseconds described second blanking time, and be 100 milliseconds described the 3rd blanking time, and device A is 5 times to the number of times that equipment B sends OAM fast detecting message.
5. the device of an OAM fast detecting is characterized in that, this device comprises:
Fast detecting start unit: when being used for equipment to be detected and not receiving that OAM detects handshake information at interval, start the fast detecting timer, notify equipment to be detected to send OAM fast detecting message and detect in the very first time;
Fast detecting timer: be used to set time less than OAM fast detecting at interval of the described very first time;
Fast detecting judging unit: be used for after described fast detecting start unit starts described fast detecting timer, judge whether described equipment to be detected receives OAM fast detecting handshake information in the time that described fast detecting timer is set;
Fast detecting is handled the unit: be used for handling according to the result of described fast detecting judgment unit judges, when described fast detecting judgment unit judges when receiving described OAM fast detecting handshake information, stop described fast detecting timer and notify described equipment to be detected to stop to send described OAM fast detecting message, recovering normal OAM detects, when described fast detecting judgment unit judges when not receiving described OAM fast detecting handshake information, the OAM detection failure is set.
6. OAM device for fast detecting according to claim 5, it is characterized in that: the content of described fast detecting start unit expansion OAM detect-message cell, and the OAM detect-message after will expanding is carried out the OAM fast detecting as the described equipment to be detected of OAM fast detecting message informing.
7. OAM device for fast detecting according to claim 6 is characterized in that: described fast detecting start unit notifies equipment to be detected to send at least 1 time OAM fast detecting message in the time that described fast detecting timer is set.
8. the system of an OAM fast detecting comprises device A to be detected, equipment B, it is characterized in that, also comprises:
Fast detecting start unit: be used for device A to be detected and in very first time interval, do not receive when the OAM of equipment B transmission to be detected detects handshake information, start the fast detecting timer, notify described device A to be detected to send OAM fast detecting message and detect;
The fast detecting timer; Be used to set time less than OAM fast detecting at interval of the described very first time;
Fast detecting judging unit: be used for after described fast detecting start unit starts described fast detecting timer, judge whether described device A to be detected receives described OAM fast detecting handshake information in the time that described fast detecting timer is set;
Fast detecting is handled the unit: be used for handling according to the result of described fast detecting judgment unit judges, when described fast detecting judgment unit judges is the described OAM fast detecting handshake information of receiving that described equipment B sends, stop described fast detecting timer and notify described device A to be detected to stop to send described OAM fast detecting message, recovering normal OAM detects, when described fast detecting judgment unit judges during, the OAM detection failure is set for the described OAM fast detecting handshake information of not receiving that described equipment B sends.
9. OAM rapid detection system according to claim 8, it is characterized in that: described fast detecting start unit is expanded the content of described OAM detect-message cell, and the OAM detect-message after will expanding is carried out the OAM fast detecting as the described device A to be detected of described OAM fast detecting message informing.
10. OAM rapid detection system according to claim 9 is characterized in that: described fast detecting start unit notifies described device A to be detected to send at least 1 time OAM fast detecting message in the time that described fast detecting timer is set.
11. OAM rapid detection system according to claim 10, it is characterized in that: the time that described fast detecting timer is set is 1/2nd of described very first time interval, and the time interval that described fast detecting start unit notifies described device A to be detected to send OAM fast detecting message in the time that described fast detecting timer is set is 1/5th of described second time interval.
12. OAM rapid detection system according to claim 9, it is characterized in that: described very first time interlude is 1 second, the time that described fast detecting timer is set is 500 milliseconds, and described fast detecting start unit notifies described device A to be detected to send 5 OAM fast detecting message in described 500 milliseconds.
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| CNA200710073137XA CN101232406A (en) | 2007-01-26 | 2007-01-26 | OAM fast detecting method, apparatus and system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478421B (en) * | 2008-12-05 | 2011-04-20 | 中兴通讯股份有限公司 | OAM packet timing processing system and method |
| CN102143005A (en) * | 2011-04-14 | 2011-08-03 | 中兴通讯股份有限公司 | Method and device for determining fault elimination based on operation and maintenance (OAM) |
| WO2011120297A1 (en) * | 2010-03-30 | 2011-10-06 | 中兴通讯股份有限公司 | Protection method, system, provider edge and customer edge for virtual private lan services |
| CN103428037A (en) * | 2012-05-16 | 2013-12-04 | 华为技术有限公司 | User online detecting method, device and system |
| CN101997711B (en) * | 2009-08-17 | 2014-12-10 | 中兴通讯股份有限公司 | Method and packet data network (PDN) system for sending operation administration maintenance (OAM) message |
| CN104216506A (en) * | 2013-05-30 | 2014-12-17 | 华为技术有限公司 | Data interaction method and device based on gesture operation |
| CN112910742A (en) * | 2021-03-15 | 2021-06-04 | 杭州迪普科技股份有限公司 | Link state detection method and device |
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2007
- 2007-01-26 CN CNA200710073137XA patent/CN101232406A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478421B (en) * | 2008-12-05 | 2011-04-20 | 中兴通讯股份有限公司 | OAM packet timing processing system and method |
| CN101997711B (en) * | 2009-08-17 | 2014-12-10 | 中兴通讯股份有限公司 | Method and packet data network (PDN) system for sending operation administration maintenance (OAM) message |
| WO2011120297A1 (en) * | 2010-03-30 | 2011-10-06 | 中兴通讯股份有限公司 | Protection method, system, provider edge and customer edge for virtual private lan services |
| CN102143005A (en) * | 2011-04-14 | 2011-08-03 | 中兴通讯股份有限公司 | Method and device for determining fault elimination based on operation and maintenance (OAM) |
| WO2012139477A1 (en) * | 2011-04-14 | 2012-10-18 | 中兴通讯股份有限公司 | Method and device for determining failure elimination based on oam protocol |
| CN102143005B (en) * | 2011-04-14 | 2015-01-28 | 中兴通讯股份有限公司 | Method and device for determining fault elimination based on operation and maintenance (OAM) |
| CN103428037A (en) * | 2012-05-16 | 2013-12-04 | 华为技术有限公司 | User online detecting method, device and system |
| CN104216506A (en) * | 2013-05-30 | 2014-12-17 | 华为技术有限公司 | Data interaction method and device based on gesture operation |
| CN112910742A (en) * | 2021-03-15 | 2021-06-04 | 杭州迪普科技股份有限公司 | Link state detection method and device |
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