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A Distributed System Military 1394 Bus Data Integrity Monitoring Method

A distributed system and data integrity technology, applied in the field of avionics systems, can solve problems such as medium characteristics, packet format message validity, and system integrity constraints

Active Publication Date: 2021-05-07
CHENGDU AIRCRAFT DESIGN INST OF AVIATION IND CORP OF CHINA
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Problems solved by technology

[0003] In the distributed system, the current comprehensive and modular aviation subsystems mostly use the bus network to complete the communication work between the aviation LRMs (Line Replaceable Modules), which has a greater impact on data throughput, data transmission certainty and fault isolation capabilities. To meet the higher requirements, there will often be a large number of continuous and uninterrupted data packets that record key information in the network data communication using the military 1394 bus. Integrity is constrained, and the military 1394 bus is suitable for asynchronous transmission mode, how to effectively detect, analyze and process its faults has undoubtedly become a key technical issue for the monitor function

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  • A Distributed System Military 1394 Bus Data Integrity Monitoring Method
  • A Distributed System Military 1394 Bus Data Integrity Monitoring Method
  • A Distributed System Military 1394 Bus Data Integrity Monitoring Method

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Embodiment Construction

[0019] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] see figure 1 , which is a flow chart of the method for monitoring the data integrity of the distributed system military 1394 bus of the present invention.

[0021] The present invention is applied to military 1394 bus verification and detection, and the core of the monitoring algorithm is two bus verification methods-heartbeat word monitoring and SVPC monitoring. The invention first proposes the definition of the two bus detection methods, and designs a fusion judgment algorithm based on the failure times of the ILM monitor of the two verification methods in a continuous period to complete the monitoring of the bus transmission signal.

[0022] There are three types of system terminals associated with the military 1394 bus: bus controller (CC), remote node (RN), and bus (CM). For the convenience of presentation, here we only discuss i...

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Abstract

The invention belongs to the avionics system technology, and relates to a data integrity monitoring method of a distributed system military 1394 bus. The invention is a military 1394 bus detection method which integrates two bus verification methods of heartbeat word monitoring and SVPC monitoring. The invention designs a bus ILM online monitor based on two verification methods, and designs a fusion judgment algorithm based on the number of failures of the ILM monitor of the two verification methods in a continuous period of time to complete the monitoring of the bus transmission signal. To judge the validity of the bus. Aiming at the bus operation cycle of different systems in the actual distributed system, a heartbeat word tolerance design applied to the military 1394 bus detection method is proposed. At the same time, regarding the verification of bus data, a SVPC verification method is proposed which uses the method of sequentially obtaining XOR of each data to generate a verification bit.

Description

technical field [0001] The invention belongs to the avionics system technology, and relates to a data integrity monitoring method of a distributed system military 1394 bus. Background technique [0002] In today's aviation field or industrial field, with the rapid development of electronic technology, system integration, modularization, and systematization have become the main development trend, which has led to bus technology has already become an important part of system design, in the design of electronic products The performance of the bus transmission is one of the main factors that determine the speed, accuracy and safety of the entire aviation system. Among them, the military 1394 bus, as a high-speed serial bus, has been widely used in high-security fields such as data cameras, computers, industrial measurement and control, and even aerospace due to its high-speed, flexibility, and scalability. [0003] In the distributed system, the current comprehensive and modula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L12/24H04L1/00
CPCH04L1/0061H04L41/0681H04L43/10H04L43/16
Inventor 郑菱莎王涛金智闫泓宇赵喆徐敏
Owner CHENGDU AIRCRAFT DESIGN INST OF AVIATION IND CORP OF CHINA
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