CN107276710A - Time triggered Ethernet method for diagnosing faults based on time synchronized condition monitoring - Google Patents
Time triggered Ethernet method for diagnosing faults based on time synchronized condition monitoring Download PDFInfo
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- CN107276710A CN107276710A CN201710494329.1A CN201710494329A CN107276710A CN 107276710 A CN107276710 A CN 107276710A CN 201710494329 A CN201710494329 A CN 201710494329A CN 107276710 A CN107276710 A CN 107276710A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Small-Scale Networks (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Computer And Data Communications (AREA)
Abstract
The invention provides a kind of time triggered Ethernet method for diagnosing faults based on time synchronized condition monitoring, belong to onboard networks communication technical field, it is characterised in that：The global unified time reference that binding time triggering Ethernet is set up, the diagnosis of malfunction is carried out by decision condition of the time deviation between communication node.All end nodes and interchanger send local time reference information to its adjacent interchanger, interchanger is modified and contrasted to the time reference information received, passage time deviation size judges the running status of adjacent node, and result of determination is fed back into corresponding end node or interchanger.In the process, the data delivery and reception module and communication software of physical communication link, both sides between neighbouring device can be verified, have the advantages that simple and practical, easy realization, reliability are high, while can not effectively judge the problem of failure available for double remaining communication systems are solved.
Description
Technical field
The invention belongs to onboard networks communication technical field, it is related to a kind of communication link fails diagnostic method.
Background technology
Onboard networks communication system is the critical component of whole airborne avionics system, and communication system failure will cause sensor
Feedback data or flight control computer control instruction can not correct transmitting, the completion to aircraft security and aerial mission has
Vital influence.It is general to avoid single link from depositing using the method for redundancy backup in order to improve the reliability of network service
Reliability the problems such as.Consider many factors such as cost, resource utilization, time triggered ethernet communication system is typically adopted
The backup layer by layer of equipment is avoided with the exchange web frame of double remainings.However, face always one of double remaining communication systems is important
Problem is how effectively to carry out remaining voting and fault diagnosis, i.e., when two passages have inconsistence problems, how to screen
Correctly and faulty channel.If dealt with improperly, double remaining communication systems do not simply fail to improve system reliability, also result in system
Failure and the increase of the probability of error, network reliability during compared to single channel are worse.
The content of the invention
In view of the above-mentioned problems, being examined it is an object of the invention to provide the high failure of a kind of simple and practical, easy realization, reliability
Disconnected method.
Time triggered Ethernet method for diagnosing faults based on time synchronized condition monitoring, it is characterised in that comprising following
Step：
(1) the time triggered Ethernet performs Time synchronization algorithm, and deadline synchronizing process forms global unification
Time reference；
(2) at the time of making an appointment, in the time triggered Ethernet all end nodes and interchanger by its it is local when
Between reference information be sent to adjacent interchanger；
(3) in the time triggered Ethernet all interchangers the time reference information that receives is carried out delay compensation and
Calculate, perform time synchronized state decision process, judge that the time of each port correspondence communication equipment is same according to time deviation size
Whether step state is normal；
(4) all interchangers encapsulate time synchronized state determination results to feedback of status in the time triggered Ethernet
Data frame is sent to the corresponding end node in each port or interchanger；
(5) all end nodes and interchanger perform communication link operation according to feedback result in the time triggered Ethernet
State decision process, judges whether the running status of associated communication link is normal.
Further, the time reference information need to reach its purpose interchanger in specified time window, otherwise regard
To be invalid.
Further, the calculation basis of the time deviation is that the time triggered Ethernet passage time synchronizing process is built
Vertical global unified time reference.
Further, in the time triggered Ethernet all interchangers to not receiving the end of orthochronous reference information
Mouthful, directly judge the time synchronized abnormal state of its corresponding communication equipment.
Further, the feedback of status data frame need to reach the corresponding end node in each port in specified time window
Or interchanger, it is invalid to be otherwise considered as.
Further, in the time triggered Ethernet all end nodes and interchanger to not receiving state feedback information frame
Or the situation of abnormality feedback is received, judge that the running status of associated communication link is abnormal, only receiving normal condition feedback
Situation when, judge the running status of associated communication link to be normal.
The present invention can effectively verify physical transfer between adjacent communication node in the transmission and feedback procedure of temporal information
Whether the hardware components such as link, the data delivery and reception module of both sides are normal, and the temporal information of each communication node and soft
The running status of part part, with simple and practical, easy realization, high reliability.In addition, being set up with time triggered Ethernet
Global unified time reference be judgment basis, correct reference information can be provided for pair remaining communication systems, for solving
Two channel statuses can not effectively judge the problem of faulty channel when inconsistent.
Brief description of the drawings
Fig. 1：The algorithm flow chart of the present invention.
Fig. 2：TTE exemplary systems.
Embodiment
The invention will be further described with example below in conjunction with the accompanying drawings, and scheme described herein is only used for providing to this
Further understanding for invention, is the part of the application, the restriction to the present invention program is not constituted.
By taking prototype system shown in Fig. 2 as an example, summary uses the reality of the method for diagnosing faults based on time synchronized condition monitoring
Existing process.Each node has two communication ports in Fig. 2, and two different switch devices are connected respectively, constitutes double remainings and leads to
Believe link.The method for diagnosing faults that the present invention is introduced can be performed periodically, can also trigger performing by some conditions, for one
Specific diagnosis process, its step is as follows：
1. time synchronization process：Time triggered Ethernet realizes that global network communicates by regular hour synchronous method
Time synchronized between node, forms unified time reference.
2. transmission time information：At the time of making an appointment, end node to its neighboring switch send itself local when
Between reference information, i.e. end node N1, N2 and N3 to interchanger SW1 and SW2 transmission time information, end node N4 and N5 is to interchanger
SW3 and SW4 transmission time informations；Temporal information, i.e. interchanger SW1 and SW2 are intercoursed between neighboring switch to interchanger
SW3 and SW4 transmission time informations, while interchanger SW3 and SW4 is to interchanger SW1 and SW2 transmission time information.Interchanger has
The individual reception time window specified, the temporal information reached in reception window is considered as effective information, can be used as follow-up bar
The data that part judges, the temporal information reached outside reception time window is dropped.
3. time synchronized state judges：The temporal information that interchanger is received according to each port, propagation delay is carried out to it
Compensation and correction, eliminate the influence of the factors such as transmission delay, and the time reference after then being corrected to each port is contrasted, and judge
Whether the running status of each port correspondence communication equipment is normal.At the appointed time in window, for non-time of receipt (T of R) information or institute
The port that information frame can not be parsed correctly is received, thinks that corresponding communication link is faulty.For the time letter being properly received
Breath, state judgement is carried out using certain algorithm to it.Illustratively, using simple application condition method herein：With interchanger
Local time reference for reference, judge its time deviation between adjacent end node or interchanger, if deviation be more than certain threshold
Value, then it is assumed that associated communication link is problematic, if time deviation is in range of receiving, then it is assumed that associated communication link is normal.It is right
Other method and thinking can be also used to improve Performance And Reliability in time synchronized state decision problem, such as：Received all
To temporal information put together and compare, the distributed area where most of node time benchmark is calculated, outside interval
Time point corresponding communication link thinks malfunction, the adverse effect produced when so can eliminate reference mode failure.
4. feedback states result of determination：State and type of error after judgement is fed back to the corresponding end in each port by interchanger
Node or interchanger, such as interchanger SW1 judge its peer node N1, N2 and N3 and neighboring switch SW3 and SW4 state
As a result corresponding end node and interchanger are fed back to.Each node and interchanger have for the arrival time of feedback information frame to be reached at the latest
Time-constrain, the feedback information received after arrival time at the latest is abandoned, the feedback only reached before designated time point
Information can be used for the diagnosis of consequent malfunction condition.
5. fault condition is diagnosed：Each end node and switch device are received after the information frame of feedback of status, to related communication
The running status of link is judged and updated.If receiving normal feedback of status, illustrate that the round link of data communication is equal
Normally, normal condition is set to, if receiving improper feedback of status and type of error, corresponding treatment measures are carried out,
Such as：If continuous 3 times receive error feedback information frame, then it is assumed that respective communication link failure, startup separator detection and quarantine measures.
It is the fault diagnosis that each communication node and link in time triggered Ethernet can be achieved by above-mentioned steps and method,
Meanwhile, the problem of present invention can also be used to solve that effectively remaining voting can not be carried out in double remaining communication systems.With Fig. 2 interior joints
Exemplified by N1 two communication cards (passage A and passage B), it is assumed that the data that passage A and passage B are received are inconsistent, then can not sentence
Which fixed passage breaks down and mistake.Using the above method, passage A and passage B respectively send out the time reference information of itself
Corresponding interchanger is given, interchanger judges the fortune of each node according to time deviation using global unified time reference as reference
Row state, then feeds back to corresponding node by result of determination.Only when all communication process (physical communication link, data transmit-receive
Module, data processing software etc.) it is correct when, passage A or passage B can just receive the normal feedback information of running status.Therefore,
Necessarily there is a passage for not receiving feedback or receiving abnormality feedback between the two, then, two passages can be according to each
The running status of itself is judged from the state feedback information received, correct data source is selected.
Claims (6)
1. the time triggered Ethernet method for diagnosing faults based on time synchronized condition monitoring, it is characterised in that include following step
Suddenly：
(1) the time triggered Ethernet performs Time synchronization algorithm, and deadline synchronizing process forms the global unified time
Benchmark；
(2) at the time of making an appointment, all end nodes and interchanger are by its local zone time base in the time triggered Ethernet
Calibration information is sent to adjacent interchanger；
(3) all interchangers carry out delay compensation and meter to the time reference information received in the time triggered Ethernet
Calculate, perform time synchronized state decision process, the time synchronized of each port correspondence communication equipment is judged according to time deviation size
Whether state is normal；
(4) all interchangers encapsulate time synchronized state determination results to feedback of status data in the time triggered Ethernet
Frame is sent to the corresponding end node in each port or interchanger；
(5) all end nodes and interchanger perform communication link running status according to feedback result in the time triggered Ethernet
Decision process, judges whether the running status of associated communication link is normal.
2. the time reference information according to claim 1 step (2), it is characterised in that the time reference information is needed
Its purpose interchanger is reached in specified time window, it is invalid to be otherwise considered as.
3. the time deviation according to claim 1 step (3), it is characterised in that the calculation basis of the time deviation
It is the global unified time reference that the time triggered Ethernet passage time synchronizing process is set up.
4. the time synchronized state decision process according to claim 1 step (3), it is characterised in that the time touches
All interchangers directly judge its corresponding communication equipment to not receiving the port of orthochronous reference information in hair Ethernet
Time synchronized abnormal state.
5. the feedback of status data frame according to claim 1 step (4), it is characterised in that the feedback of status data
Frame need to reach the corresponding end node in each port or interchanger in specified time window, and it is invalid to be otherwise considered as.
6. the communication link running status decision process according to claim 1 step (5), it is characterised in that when described
Between triggering Ethernet in all end nodes and interchanger to do not receive state feedback information frame or receive abnormality feedback feelings
Condition, judges that the running status of associated communication link is abnormal, only when receiving the situation of normal condition feedback, judges related communication chain
The running status on road is normal.
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Cited By (6)
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| CN108282359A (en) * | 2017-12-27 | 2018-07-13 | 北京控制工程研究所 | A kind of raising time triggered Ethernet data transmission reliability system |
| CN108631899A (en) * | 2018-05-16 | 2018-10-09 | 常州海德克智能科技有限公司 | It is forwarded and fault-tolerance approach and device based on the data packet in time triggered Ethernet |
| CN109462493A (en) * | 2018-09-13 | 2019-03-12 | 国网浙江省电力有限公司丽水供电公司 | A kind of local area network monitoring method of PIN-based G |
| CN110035020A (en) * | 2018-12-29 | 2019-07-19 | 清华大学 | A kind of scheduling of time trigger Ethernet switch and synchronization policy |
| CN110167060A (en) * | 2019-06-19 | 2019-08-23 | 深圳市英特瑞半导体科技有限公司 | A kind of management method of time network node, device and time network node |
| WO2022134742A1 (en) * | 2020-12-24 | 2022-06-30 | 中兴通讯股份有限公司 | Network failure diagnosis method and apparatus, device and storage medium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282359A (en) * | 2017-12-27 | 2018-07-13 | 北京控制工程研究所 | A kind of raising time triggered Ethernet data transmission reliability system |
| CN108631899A (en) * | 2018-05-16 | 2018-10-09 | 常州海德克智能科技有限公司 | It is forwarded and fault-tolerance approach and device based on the data packet in time triggered Ethernet |
| CN109462493A (en) * | 2018-09-13 | 2019-03-12 | 国网浙江省电力有限公司丽水供电公司 | A kind of local area network monitoring method of PIN-based G |
| CN109462493B (en) * | 2018-09-13 | 2021-12-28 | 国网浙江省电力有限公司丽水供电公司 | Local area network monitoring method based on PING |
| CN110035020A (en) * | 2018-12-29 | 2019-07-19 | 清华大学 | A kind of scheduling of time trigger Ethernet switch and synchronization policy |
| CN110167060A (en) * | 2019-06-19 | 2019-08-23 | 深圳市英特瑞半导体科技有限公司 | A kind of management method of time network node, device and time network node |
| CN110167060B (en) * | 2019-06-19 | 2022-07-05 | 深圳市英特瑞半导体科技有限公司 | Time network node management method and device and time network node |
| WO2022134742A1 (en) * | 2020-12-24 | 2022-06-30 | 中兴通讯股份有限公司 | Network failure diagnosis method and apparatus, device and storage medium |
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| CN107276710B (en) | 2019-03-22 |
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