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A vehicle clock synchronization method, device, system and storage medium

A clock synchronization and vehicle technology, applied in systems and storage media, vehicle clock synchronization methods, and device fields, can solve problems such as single-point failure of the master node, avoid single-point failure, and improve reliability and accuracy Effect

Active Publication Date: 2021-06-11
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This synchronization mechanism realizes the clock synchronization of each node, but its disadvantage is that it does not consider the case of single-point failure of the master node

Method used

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  • A vehicle clock synchronization method, device, system and storage medium
  • A vehicle clock synchronization method, device, system and storage medium
  • A vehicle clock synchronization method, device, system and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] figure 1 The flow diagram of a clock synchronization method of a vehicle provided by the embodiment of the present invention, the present embodiment can be applied to the clock synchronization of the electronic control unit of the vehicle, and the method can be performed by the clock synchronization device or system of the vehicle. Such as figure 1 As shown, the method includes:

[0023] Step 110, when the vehicle is powered on, periodically receiving the first synchronization message of the first primary time node via the second main time node, and the first follow message.

[0024] The first main time node can also be simply referred to as the first master node, which is the default main time node, and when it has not failed, the clock synchronization is transmitted by the first primary time node by default. The second main time node can also be simply referred to as the second master node. When the secondary main time node, when the first master node failed or expired, ...

Embodiment 2

[0048] figure 2 It is a flow chart of a clock synchronization method of a vehicle in the second embodiment of the present invention, and this embodiment is further refined based on the above embodiment, such as figure 2 As shown, the clock synchronization method of the vehicle provided in this embodiment includes:

[0049] Step 201, the vehicle is powered on.

[0050] Step 202, periodically transmitting the first synchronization message and the first follow message to the second main time node and each from the time node via the first primary time node.

[0051] Step 203, determine if the vehicle is powdered, if yes, the program ends, if, then proceeds to step 204.

[0052] In step 204, it is judged whether or not the first synchronization message is received within the preset time period, and when step 205 is performed, step 208 is performed.

[0053] Step 205 determines whether or not the first main time node deviation is greater than the first deviation threshold, if not, step...

Embodiment 3

[0061] image 3 It is a schematic structural diagram of a clock synchronization device of a vehicle in the third embodiment of the present invention, such as image 3 As shown, the clock synchronization device of the vehicle includes: the first master node synchronization module 310, the first master node failure determination module 320, and the second master node synchronization module 330.

[0062] Among them, the first master node synchronization module 310 is used to receive the first synchronization message of the first primary time node and the first follow-up message via the second main time node after the vehicle is powered up; the first master node failure judgment module 320, used to determine if the first primary time node is failed; the second master node synchronization module 330 is used to fail to fail, via the second master node, from time nodes And the first primary time node transmits a synchronization request, the second synchronization message, and the second f...

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PUM

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Abstract

The invention discloses a vehicle clock synchronization method, device, system and storage medium. The clock synchronization method of the vehicle includes: after the vehicle is powered on, receiving the first synchronization message and the first follow-up message of the first main time node via the second main time node; judging whether the first main time node is invalid; If so, send a synchronization request, a second synchronization message, and a second follow-up message to each slave time node and the first master time node via the second master time node, so that each of the slave time nodes and the first master time node After receiving the synchronization request, the first master time node performs clock synchronization according to the second synchronization message and the second following message. The technical solution of the embodiment of the present invention overcomes the disadvantage of single-point failure in traditional synchronization by setting dual master time nodes for clock synchronization, and the clock synchronization is reliable and accurate.

Description

Technical field [0001] Embodiments of the present invention relate to the field of clock synchronous techniques, and more particularly to a clock synchronization method, apparatus, system, and storage medium of a vehicle. Background technique [0002] With the development of vehicle intelligence and network connection, the number of car ECUs has increasing, and netization has become the key and trend of automotive electronics. Because the automotive electronic system is a very important safety key system, the reliability and real time of network operation is very important. Especially for advanced automatic driving systems, higher requirements are made for clock synchronization between communication transmission and clock synchronization between ECUs. [0003] At present, the clock synchronization scheme for the automobile CAN bus is mainly based on Autosar-based clock synchronization mechanism. The gestational time node periodically transmits the synchronous packet to the slave ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06H04L12/40
CPCH04J3/0638H04L12/40H04L2012/40215H04L2012/40273
Inventor 孙建蕾尹荣彬陈博
Owner CHINA FIRST AUTOMOBILE