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A vehicle Ethernet AVB jitter optimization method, system and storage medium

An optimization method and Ethernet technology, applied in the information field, can solve the problems such as the inability to improve the AVB jitter characteristics and the inability to fundamentally solve the AVB communication delay, etc., to achieve the effect of improving the jitter characteristics, solving poor interoperability and satisfying the delay.

Active Publication Date: 2022-05-31
PURPLE MOUNTAIN LAB
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AI Technical Summary

Problems solved by technology

However, this method cannot fundamentally solve the AVB communication delay, let alone improve the jitter characteristics of AVB

Method used

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  • A vehicle Ethernet AVB jitter optimization method, system and storage medium
  • A vehicle Ethernet AVB jitter optimization method, system and storage medium
  • A vehicle Ethernet AVB jitter optimization method, system and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Based on the stipulations of IEEE 802.1AS, time synchronization calibration is performed on the sender, the AVB bridge, and the receiver.

[0047] d=((t2-t1)+(t4-t3)) / 2;

[0054] In a possible implementation manner, at the ingress (Ingress) of the AVB bridge, a compensator is added. As shown in Figure 3

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Abstract

The invention discloses a vehicle Ethernet AVB jitter optimization method, system and storage medium, belonging to the field of information technology. Aiming at the network jitter problem of the vehicle-mounted Ethernet AVB technology existing in the prior art in scenarios such as automatic driving-related sensor fusion processing, the present invention provides a method for optimizing the vehicle-mounted Ethernet AVB jitter, comprising the following steps: establishing constraints, namely Admission control; establish time synchronization; calculate the network delay of each hop; establish a delay compensation mechanism model; calculate the upper and lower boundaries of end-to-end jitter. In addition, a vehicle Ethernet AVB jitter optimization system and a storage medium are also provided. The above method, system and storage medium adopt Ethernet, which solves the problem of poor interoperability of the traditional vehicle bus; adopts the AVB protocol to meet the delay of vehicle audio and video transmission; Improve the jitter characteristics of the AVB protocol.

Description

A kind of vehicle Ethernet AVB jitter optimization method, system and storage medium technical field The present invention relates to information technology field, more specifically, relate to a kind of vehicle-mounted Ethernet AVB jitter optimization method, system and storage medium. Background technique According to the definition of the national standard of the People's Republic of China "Automotive Driving Automation Classification" (draft for approval), automatic driving There are 6 levels from level 0 to level 5. As the level of autonomous driving increases, more sensors need to be deployed, such as cameras, Lidar, millimeter wave radar, etc. The traditional in-vehicle network is mainly composed of CAN, LIN, Flexray and other buses. Insufficient width; secondly, data such as cameras and lidars using the above interfaces need to be compressed before they can be transmitted, which is easy to import. Due to low processing accuracy and other problems; Ethernet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L43/087H04L43/0852H04L41/14H04L12/46H04L67/12
CPCH04L43/087H04L43/0852H04L41/14H04L12/462H04L67/12
Inventor 朱海龙白钰谢人超黄韬
Owner PURPLE MOUNTAIN LAB
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