CN107276710B - Time trigger Ethernet method for diagnosing faults based on time synchronization condition monitoring - Google Patents
Time trigger Ethernet method for diagnosing faults based on time synchronization condition monitoring Download PDFInfo
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- CN107276710B CN107276710B CN201710494329.1A CN201710494329A CN107276710B CN 107276710 B CN107276710 B CN 107276710B CN 201710494329 A CN201710494329 A CN 201710494329A CN 107276710 B CN107276710 B CN 107276710B
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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)
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- Environmental & Geological Engineering (AREA)
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- Maintenance And Management Of Digital Transmission (AREA)
- Computer And Data Communications (AREA)
Abstract
The present invention provides a kind of time trigger Ethernet method for diagnosing faults based on time synchronization condition monitoring, belong to onboard networks field of communication technology, it is characterized by: the global unified time reference that binding time triggering Ethernet is established, the diagnosis of malfunction is carried out using the time deviation between communication node as decision condition.All end nodes and interchanger send local time reference information to its adjacent interchanger, interchanger is modified and compares to the time reference information received, the operating status of adjacent node is determined by time deviation size, and will determine that result feeds back to corresponding end node or interchanger.In the process, the data transmission 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, Yi Shixian, high reliablity, while can be used for solving the problems, such as that double redundancy communication system can not effectively determine failure.
Description
Technical field
The invention belongs to onboard networks fields of communication technology, are related to a kind of communication link fails diagnostic method.
Background technique
Onboard networks communication system is the critical component of entire airborne avionics system, and communication system failure will lead to sensor
Feedback data or flight control computer control instruction cannot correct reliable transmission, have to the completion of aircraft security and aerial mission
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 communication
Reliability the problems such as.Consider that many factors, the time trigger ethernet communication systems such as cost, resource utilization are generally adopted
The backup layer by layer of equipment is avoided with the exchange web frame of double redundancy.However, face always one of double redundancy communication system is important
Problem is remaining voting how to be effectively performed and how fault diagnosis screens that is, when two channels are there are when inconsistence problems
Correctly and faulty channel.If dealt with improperly, double redundancy communication system does not simply fail to improve system reliability, also results in system
Failure and the probability of error increase, and network reliability when compared to single channel is worse.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide the failures of a kind of simple and practical, Yi Shixian, high reliablity to examine
Disconnected method.
Time trigger Ethernet method for diagnosing faults based on time synchronization condition monitoring, which is characterized in that comprising following
Step:
(1) the time trigger Ethernet executes Time synchronization algorithm, and deadline synchronizing process forms global unification
Time reference；
(2) at the time of making an appointment, when all end nodes and interchanger are by its local in the time trigger Ethernet
Between reference information be sent to adjacent interchanger；
(3) in the time trigger Ethernet all interchangers to the time reference information that receives carry out delay compensation and
It calculates, executes time synchronization state decision process, the global unified time reference established according to the time trigger Ethernet
Calculate time deviation, according to above-mentioned time deviation size determine the corresponding end node in each port of above-mentioned interchanger or interchanger when
Between synchronous regime it is whether normal；
(4) all interchangers encapsulate time synchronization state determination results to state feedback in the time trigger Ethernet
Data frame is sent to the corresponding end node in each port of above-mentioned interchanger or interchanger；
(5) all end nodes and interchanger are run according to feedback result execution communication link in the time trigger Ethernet
State decision process judges whether the operating status of associated communication link is normal.
Further, the time reference information in described (2) step needs to reach the friendship of its purpose in window at the appointed time
It changes planes, it is invalid to be otherwise considered as.
Further, in the implementation procedure of the time synchronization state decision process in described (3) step, the time trigger
All interchangers directly determine the end node or friendship corresponding to it to the port for not receiving orthochronous reference information in Ethernet
The time synchronization abnormal state changed planes.
Further, the state feedback data frame in described (4) step needs to reach above-mentioned friendship in window at the appointed time
It changes planes the corresponding end node in each port or interchanger, it is invalid to be otherwise considered as.
Further, in the implementation procedure of the communication link operating status decision process in described (5) step, the time
The case where all end nodes and interchanger be not to receiving status feedback information frame or receiving abnormality feedback in triggering Ethernet,
Determine that the operating status of associated communication link is abnormal, only when receiving the case where normal condition is fed back, determines associated communication link
Operating status be normal.
The present invention can effectively verify physical transfer between adjacent communication node in the transmitting and feedback procedure of temporal information
Link, both sides whether the hardware components such as data transmission and reception module normal and the temporal information of each communication node and soft
The operating status of part part has simple and practical, Yi Shixian, high reliability.In addition, with the foundation of time trigger Ethernet
The unified time reference of the overall situation be judgment basis, correct reference information can be provided for double redundancy communication system, for solving
Two channel statuses can not effectively determine the problem of faulty channel when inconsistent.
Detailed description of the invention
Fig. 1: algorithm flow chart of the invention.
Fig. 2: TTE exemplary system.
Specific embodiment
The invention will be further described with example with reference to the accompanying drawing, and scheme described herein is only used to provide to this
Invention is further understood, and is a part of the application, is not constituted the restriction to the present invention program.
For the prototype system shown in Fig. 2, summary using the method for diagnosing faults based on time synchronization condition monitoring reality
Existing process.There are two communication channels for each node in Fig. 2, are separately connected two different switch devices, it is logical to constitute double redundancy
Believe link.The method for diagnosing faults that the present invention is introduced can be executed periodically, can also be triggered and be executed by some conditions, for one
Specific diagnosis process, its step are as follows:
1. time synchronization process: time trigger Ethernet realizes global network communication by regular hour synchronous method
Time synchronization between node forms unified time reference.
2. transmission time information: at the time of making an appointment, when end node sends the local of itself to its neighboring switch
Between reference information, i.e. end node N1, N2 and N3 is to interchanger SW1 and SW2 transmission time information, and end node N4 and N5 is to interchanger
SW3 and SW4 transmission time information；Intercourse temporal information between neighboring switch, i.e. interchanger SW1 and SW2 is to interchanger
SW3 and SW4 transmission time information, while interchanger SW3 and SW4 is to interchanger SW1 and SW2 transmission time information.Interchanger has
A specified receiving time window is considered as effective information receiving the temporal information reached in window, can be used as subsequent item
The data that part determines, the temporal information reached except receiving time window are dropped.
3. time synchronization state determines: the temporal information that interchanger is received according to each port carries out propagation delay to it
Compensation and correction, eliminate the influence of the factors such as transmission delay, then compare, determine to the time reference after the correction of each port
Whether the operating status that each port corresponds to 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, carries out state judgement to it using certain algorithm.Illustratively, using simple application condition method herein: with interchanger
Local time reference be reference, its time deviation between adjacent end node or interchanger is judged, if the big Mr. Yu's threshold of deviation
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 methods and thinking also can be used to improve Performance And Reliability, such as in time synchronization state decision problem: by all receptions
To temporal information put together and compare, the distributed area where most of node time benchmark is calculated, except section
Time point corresponding communication link thinks malfunction, the adverse effect generated when can eliminate reference mode failure in this way.
4. feedback states determine result: interchanger by after judgement state and type of error feed back to the corresponding end in each port
Node or interchanger, such as interchanger SW1 determine the state of its peer node N1, N2 and N3 and neighboring switch SW3 and SW4
As a result corresponding end node and interchanger are fed back to.Each node and interchanger have 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 abandon, the feedback only reached before designated time point
Information can be used for the diagnosis of consequent malfunction condition.
5. fault condition diagnoses: after each end node and switch device receive the information frame of state feedback, to related communication
The operating status of link is determined and is updated.If receiving normal state feedback, illustrate that the round-trip link of data communication is equal
Normally, it is set to normal condition, if receiving improper state feedback and type of error, performs corresponding processing measure,
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.
The fault diagnosis of each communication node and link in time trigger Ethernet can be realized with method through the above steps,
Meanwhile the present invention can also be used to solve the problems, such as effectively carry out remaining voting in double redundancy communication system.With Fig. 2 interior joint
For two communication cards (channel A and channel B) of N1, it is assumed that the data that channel A and channel B are received are inconsistent, then can not sentence
Which fixed channel is broken down and mistake.Using the above method, channel A and channel B respectively send out the time reference information of itself
Corresponding interchanger is given, interchanger is reference with global unified time reference, and the fortune of each node is determined according to time deviation
Then row state will determine that result feeds back to corresponding node.Only when all communication process (physical communication link, data transmit-receive
Module, data processing software etc.) it is correct when, channel A or channel B can just receive the normal feedback information of operating status.Therefore,
Necessarily there is the channel for not receiving feedback or receiving abnormality feedback between the two, then, two channels can be according to each
The operating status that itself is judged from the status feedback information received selects correct data source.
Claims (5)
1. the time trigger Ethernet method for diagnosing faults based on time synchronization condition monitoring, which is characterized in that include following step
It is rapid:
(1) the time trigger Ethernet executes 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 trigger 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 trigger Ethernet
It calculates, executes time synchronization state decision process, the global unified time reference meter established according to the time trigger Ethernet
Evaluation time deviation determines the time of the corresponding end node in each port of above-mentioned interchanger or interchanger according to above-mentioned time deviation size
Whether synchronous regime is normal；
(4) all interchangers encapsulate time synchronization state determination results to state feedback data in the time trigger Ethernet
Frame is sent to the corresponding end node in each port of above-mentioned interchanger or interchanger；
(5) all end nodes and interchanger according to feedback result execute communication link operating status in the time trigger Ethernet
Decision process judges whether the operating status of associated communication link is normal.
2. the time trigger Ethernet method for diagnosing faults according to claim 1 based on time synchronization condition monitoring,
It is characterized in that, the time reference information in (2) step needs to reach its purpose interchanger in window at the appointed time, otherwise
It is invalid to be considered as.
3. the time trigger Ethernet method for diagnosing faults according to claim 1 based on time synchronization condition monitoring,
It is characterized in that, in the implementation procedure of the time synchronization state decision process in (3) step, in the time trigger Ethernet
All interchangers to the port for not receiving orthochronous reference information, directly determine end node corresponding to it or interchanger when
Between synchronous regime it is abnormal.
4. the time trigger Ethernet method for diagnosing faults according to claim 1 based on time synchronization condition monitoring,
It is characterized in that, the state feedback data frame in (4) step needs the above-mentioned interchanger of arrival in window at the appointed time respectively to hold
The corresponding end node of mouth or interchanger, it is invalid to be otherwise considered as.
5. the time trigger Ethernet method for diagnosing faults according to claim 1 based on time synchronization condition monitoring,
It is characterized in that, in the implementation procedure of the communication link operating status decision process in (5) step, the time trigger ether
The case where all end nodes and interchanger be not to receiving status feedback information frame or receiving abnormality feedback in net, determines related
The operating status of communication link is abnormal, only when receiving the case where normal condition is fed back, determines the operation shape of associated communication link
State is normal.
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Families Citing this family (6)
| 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 |
| 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 |
| CN110035020B (en) * | 2018-12-29 | 2021-04-06 | 清华大学 | Scheduling and synchronizing strategy for time-triggered Ethernet switch |
| 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 |
| CN114666199A (en) * | 2020-12-24 | 2022-06-24 | 中兴通讯股份有限公司 | Network fault diagnosis method, device, equipment and storage medium |
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