Offset-based CAN FD (Controller Area Network with Flexible Data rate) bus message scheduling method

A scheduling method and message technology, applied in the bus network, data exchange through path configuration, digital transmission system, etc., can solve the problem that the CAN bus bandwidth cannot meet the bandwidth requirements.
CN109327367AActive Publication Date: 2019-02-12NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEASTERN UNIV LIAONING
Publication Date
2019-02-12

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Abstract

The invention discloses an offset-based CAN FD (Controller Area Network with Flexible Data rate) bus message scheduling method. For a CAN FD bus with multiple nodes, a large number of messages are transmitted between the various nodes, so that a mode for distributing an offset to a message is adopted to reduce synchronization triggering of the messages, reduce the interference delay between the messages and ensure that the messages are transmitted completely before a deadline. A genetic algorithm is used to distribute appropriate offsets to the messages, which involves designs of individual coding, population initialization, fitness function, a genetic algorithm crossover operator, a selection operator and a mutation operator. The offset-based CAN FD bus message scheduling method reduces conflicts and collisions of the messages, allows each message to have a shorter worst case response time under the condition of ensuring that the messages are transmitted completely before the deadline, and improves the schedulability of a CAN FD system.
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Description

technical field

[0001] The invention belongs to the technical field of bus message transmission, and relates to an offset-based CANFD bus message scheduling method. Background technique

[0002] CAN is an internationally standardized serial communication protocol, and the bandwidth of the traditional CAN bus cannot meet the gradually increasing bandwidth requirements, so the CAN FD bus was proposed and gradually widely used.

[0003] In the CAN FD network system, how to ensure the dispatchability of the CAN FD network is the main problem in the research. As a vehicle network bus, the CAN FD bus has been used in thousands of automotive electronic systems. In the automobile control system, in order to solve the real-time problem of distributed system communication, it is necessary to ensure the control of dynamic information and vehicles. Therefore, it is necessary to design an optimized software integrated scheduling mechanism to ensure accurate, real-time, and stable trans...

Claims

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