Method and system for realizing time synchronization of vehicle-mounted system based on IPC mechanism

A time synchronization, vehicle-mounted system technology, applied in transmission systems, time division multiplexing systems, electrical components, etc., can solve the problems of unable to achieve high-precision time synchronization of Ethernet, unable to completely replace Ethernet, etc., to achieve high-precision Time synchronization, ensuring global time consistency, and reducing the effect of transmission distance

Active Publication Date: 2021-09-21
AUTOCORE INTELLIGENT TECH NANJING CO LTD
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Problems solved by technology

Therefore, high-precision time synchronization through the Ethernet TSN gPTP protocol has become the mainstream choice; Realize high-precision time synchronization of Ethernet

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  • Method and system for realizing time synchronization of vehicle-mounted system based on IPC mechanism
  • Method and system for realizing time synchronization of vehicle-mounted system based on IPC mechanism
  • Method and system for realizing time synchronization of vehicle-mounted system based on IPC mechanism

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Embodiment Construction

[0036] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present application.

[0037] Such as figure 1 As shown, the system for realizing the time synchronization of the vehicle system based on the IPC mechanism of the present invention includes a central processing unit and an edge gateway, and the edge gateway integrates an MPU unit and an MCU unit, and supports the IPC mechanism.

[0038] The central processing unit runs the gPTP Ethernet time synchronization protocol and acts as the master clock; the MPU unit of the edge gateway runs the gPTP Ethernet time synchronization protocol and acts as the slave clock; the MCU unit of the edge gateway contains a time synchronization management module.

[0039] The main clock of the ...

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Abstract

The invention provides a method and a system for realizing time synchronization of a vehicle-mounted system based on an IPC mechanism, and a vehicle-mounted central processing unit runs an Ethernet time synchronization protocol gPTP and serves as a master clock to realize high-precision time synchronization of an edge gateway; the edge gateway receives an Ethernet time synchronization message, and operates an Ethernet time synchronization protocol gPTP on an MPU unit to serve as a slave clock to complete time synchronization with the central processing unit; and the MPU unit sends a local synchronized clock to the MCU unit through the IPC mechanism, generates an edge gateway global time reference through a clock synchronization management module of the MCU unit, and performs time synchronization with other ECUs or sensor nodes in a vehicle-mounted network through a CAN bus, thereby realizing global time synchronization of the vehicle-mounted system. According to the invention, elastic and flexible vehicle-mounted system time synchronization is realized.

Description

technical field [0001] The invention belongs to the technical field of automatic driving, and in particular relates to a method and a system for realizing time synchronization of a vehicle system based on an IPC mechanism. Background technique [0002] The Ethernet Time Synchronization Protocol (Generalized Precision Time Protocol, gPTP) complies with the IEEE802.1AS standard definition, which can realize high-precision time synchronization for time-sensitive applications. [0003] At present, with the rapid development of autonomous driving vehicle networks, Ethernet is mostly used as the backbone network, and other buses such as CAN / LIN are used as edge networks. Therefore, high-precision time synchronization through the Ethernet TSN gPTP protocol has become the mainstream choice; Realize high-precision time synchronization of Ethernet. [0004] With the rapid development of single-chip multi-core architecture in the automotive field, more and more inter-processor commun...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04L29/08
CPCH04J3/0667H04L67/12
Inventor 肖新刘洁陈诚张旸
Owner AUTOCORE INTELLIGENT TECH NANJING CO LTD
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