Time-triggered Ethernet fault diagnosis method based on time synchronization state monitoring

A time-triggered and time-synchronized technology, applied in data exchange networks, time-division multiplexing systems, digital transmission systems, etc., can solve problems such as poor network reliability, increased probability of system failures and errors, and inability to improve system reliability, etc. problem, to achieve high reliability and easy implementation

Active Publication Date: 2017-10-20
TSINGHUA UNIV
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Problems solved by technology

However, an important problem that dual redundancy communication systems have been facing is how to effectively perform redundancy voting and fault diagnosis, that is, how to identify the correct and faulty channels when there is an inconsistency between ...

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  • Time-triggered Ethernet fault diagnosis method based on time synchronization state monitoring
  • Time-triggered Ethernet fault diagnosis method based on time synchronization state monitoring

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and examples. The solutions described here are only used to provide a further understanding of the present invention, which is a part of the application and do not constitute a limitation to the solutions of the present invention.

[0019] by figure 2 The prototype system shown is taken as an example, and the implementation process of the fault diagnosis method based on time-synchronized state monitoring is briefly described. figure 2 Each node in the network has two communication channels, which are respectively connected to two different switch devices to form a dual redundant communication link. The fault diagnosis method introduced in the present invention can be executed periodically, and can also be triggered by some conditions. For a specific diagnosis process, the steps are as follows:

[0020] ① Time synchronization process: Time-triggered Ethernet realizes ti...

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Abstract

The invention provides a time-triggered Ethernet fault diagnosis method based on time synchronization state monitoring, and belongs to the field of airborne network communication technology, which is characterized in that a fault state is diagnosed by using a time deviation among communication nodes as a judgment condition in combination with a global unified time reference established by the time-triggered Ethernet. All end nodes and switches send local time reference information to adjacent switches, the switches correct and compare the received time reference information, judge the operation states of the adjacent nodes through the magnitude of the time deviation and feed back judgment results to the corresponding end nodes or switches. In the process, the physic communication links between adjacent devices, data sending and receiving modules of the both parties and communication software can be verified, the time-triggered Ethernet fault diagnosis method has the advantages of being simple and practical, easy to realize and high in reliability, and can be used for solving the problem that the existing dual redundancy communication system cannot effectively judge the fault at the same time.

Description

technical field [0001] The invention belongs to the technical field of airborne network communication and relates to a communication link fault diagnosis method. Background technique [0002] The airborne network communication system is a key component of the entire airborne avionics system. Failure of the communication system will lead to incorrect and reliable transmission of sensor feedback data or flight control computer control instructions, which will have a crucial impact on the safety of the aircraft and the completion of flight missions. In order to improve the reliability of network communication, redundant backup methods are generally used to avoid problems such as the reliability of a single link. Considering various factors such as cost and resource utilization, the time-triggered Ethernet communication system generally adopts a dual-redundancy switching network structure to avoid layer-by-layer backup of equipment. However, an important problem that dual-redun...

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Application Information

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IPC IPC(8): H04J3/06H04L12/26
CPCH04J3/0602H04J3/0638H04L43/08
Inventor 杨佳利朱纪洪
Owner TSINGHUA UNIV
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