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In-vehicle communication device and time synchronization method thereof

A technology for in-vehicle communication and time synchronization, applied in the direction of synchronization device, selection device, multiplex communication, etc., can solve the problems of setting time and synchronization time error, difficult correction error, CAN node time synchronization error, etc.

Active Publication Date: 2021-03-05
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, delays caused by transmitting synchronization time information during time synchronization and delays caused by time synchronization processing of CAN nodes may cause time synchronization errors between CAN nodes
[0008] In addition, in the prior art, since the time setting is performed by software, there may be a large error between the setting time and the synchronization time
Statistically, the error value can be measured and corrected, but it is difficult to easily correct the error due to fluctuations in CAN communication delay time and software operation time due to vehicle operation

Method used

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  • In-vehicle communication device and time synchronization method thereof
  • In-vehicle communication device and time synchronization method thereof
  • In-vehicle communication device and time synchronization method thereof

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Embodiment Construction

[0036] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same or equivalent components are denoted by the same reference numerals even if they are shown on other drawings. Also, in describing the embodiments of the present disclosure, when it is determined that the detailed description of the related known configurations or functions hinders the understanding of the embodiments of the present disclosure, the detailed description of the related known configurations or functions will be omitted.

[0037] In describing components according to an embodiment of the present disclosure, terms such as "first", "second", "A", "B", "(a)", "(b)" and the like may be used. These terms are only intended to distinguish a component from another component, and these terms do not limit the nature, order or sequence of the components. Al...

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Abstract

The present disclosure relates to an in-vehicle communication device and a time synchronization method thereof. The in-vehicle communication device includes a clock generator for generating a clock signal, a local counter for counting the number of pulses of the clock signal, a transceiver for receiving a message via an in-vehicle communication network, and a processor that determines whether themessage received via the transceiver is a synchronization message, extracts synchronization time information from the synchronization message, and adjusts a count value of the local counter based on the synchronization time information to perform time synchronization.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to Korean Patent Application No. 10-2019-0107433 filed with the Korean Intellectual Property Office on August 30, 2019, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to a vehicle communication device and a time synchronization method thereof. Background technique [0004] Typically, a Controller Area Network (CAN) has been used for communication between Electronic Control Units (ECUs) in vehicles. In other words, nodes (ECUs) connected to CAN can exchange data and / or information with each other. Each node includes CAN transceiver, CAN controller and central processing unit (CPU). [0005] In advanced driver assistance systems (ADAS) that process information from multiple sensors in a complex manner, the synchronization of time information for each sensor information is very important. For each...

Claims

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Application Information

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IPC IPC(8): H04L12/40H04J3/06
CPCH04L12/40006H04J3/0638H04L2012/40215H04L2012/40273H04Q9/00H04Q2209/30H04L12/40169H04J3/0697H04J3/0664H04L12/40058H04L7/0033H04L7/027H04L7/0041H04L12/40032H04L12/40013
Inventor 朴泰焕李河璘金范植
Owner HYUNDAI MOTOR CO LTD