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Redundant communication method for seamless switching of multiple communication buses

A seamless switching and redundant communication technology, applied in the field of computer communication, can solve the problems of discontinuous communication data, communication data repetition, etc., achieve the effect of continuous communication data, improve security, and prevent data loss

Active Publication Date: 2020-10-16
CHENGDU YUNDA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing dual-bus redundant communication system, when the dual-bus communication is switched, the communication data may be discontinuous or the communication data may be repeated.

Method used

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  • Redundant communication method for seamless switching of multiple communication buses
  • Redundant communication method for seamless switching of multiple communication buses
  • Redundant communication method for seamless switching of multiple communication buses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example one, such as Image 6 Shown:

[0050] After receiving the message from the board, the receiver executes the following logical judgment:

[0051] S01: Determine whether the maximum time stamp Cmax of the redundant message is greater than the minimum time stamp Cmin of the redundant message, if yes, skip to step S02, if otherwise, skip to step S03;

[0052] S02: Determine whether the message time stamp is greater than Cmin and less than or equal to Cmax, if it is, it is judged as a redundant message, if otherwise, it is judged as a new message, and the maximum time stamp of the redundant message and the minimum time stamp of the redundant message are updated;

[0053] S03: Determine whether the message timestamp is greater than Cmin or less than or equal to Cmax, if it is, it is determined as a redundant message, if otherwise, it is determined as a new message, and the maximum time stamp of the redundant message and the minimum time stamp of the redundant message are updat...

Embodiment 2

[0056] Example two, such as Figure 7 Shown:

[0057] After receiving the message from the communication terminal, the receiver executes the following logical judgment:

[0058] SS1: Determine whether the maximum time stamp Cmax of the redundant message is greater than the minimum time stamp Cmin of the redundant message, if yes, skip to step SS2, if otherwise, skip to step SS6;

[0059] SS2: Determine whether the time stamp of the message is greater than Cmin and less than or equal to Cmax, if yes, skip to step SS3, if otherwise, judge it as a new message, and update the maximum time stamp of the redundant message and the minimum time stamp of the redundant message;

[0060] SS3: Determine whether the current message comes from the first CAN bus CAN0, if yes, skip to step SS4; if otherwise, skip to step SS5;

[0061] SS4: Continue to determine whether the source flag of the previous message is the second CAN bus CAN1, if it is, it is determined as a new message, and the maximum time s...

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PUM

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Abstract

The invention discloses a redundant communication method for seamless switching of multiple communication buses. The number of the communication buses is at least two, each communication terminal is connected with each communication bus, and the redundant communication method comprises the following steps that S1, when a sender sends a message each time, the messages with the same content are pressed into a message sending queue of each communication bus at the same time; S2, each communication bus takes data from the message sending queue of the communication bus and sends the data; and S3, the receiver puts the messages received through each communication bus into the same queue, and for a plurality of mutually redundant messages with the same content, the system uses the first arrived message and discards the later arrived redundant message. During multi-bus switching, bus communication message 'zero' loss, continuous communication data, no data loss and no data repetition can be achieved, so that multi-communication bus seamless switching is realized, and the safety, reliability and availability of a traffic control system are improved.

Description

Technical field [0001] The invention relates to the technical field of computer communication, in particular to a redundant communication method for seamless switching of multiple communication buses. Background technique [0002] At present, as the progress of urbanization continues to accelerate, the number of urban populations is gradually increasing, and the pressure on road traffic is gradually increasing. The emergence of urban rail transit such as subways has effectively relieved the pressure of urban traffic and improved the convenience of people's travel. The signal system is an important part of the urban rail transit system. During operation, if there is a failure, it will have a greater impact on the safety of passengers. [0003] Applying redundancy technology to the design process of urban rail transit signal system is the main way to improve the safety of system application. Redundancy has two meanings. The first meaning refers to unnecessary parts, and the second ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L12/40006H04L12/40182H04L2012/40215
Inventor 王世权李夫忠吕正银段云波
Owner CHENGDU YUNDA TECH CO LTD
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