A low-power communication method and system suitable for vehicle-mounted Ethernet

By using a lightweight, precise time protocol and low-power frame tags in closed-loop control in automotive Ethernet, the bottlenecks of power redundancy, compatibility, and cost in automotive Ethernet communication are solved, achieving low-power and reliable communication.

CN122293451APending Publication Date: 2026-06-26HONGKE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HONGKE TECH CO LTD
Filing Date
2026-05-11
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing vehicle Ethernet communication in Sleep mode suffers from power redundancy, compatibility and cost bottlenecks, insufficient node synchronization accuracy, and WUR linkage failure, which limits vehicle range optimization and communication reliability.

Method used

By transmitting a reference timestamp through a lightweight, precise time protocol, a unified time base is formed. Wake-up windows are divided, and low-power frame tags are set in the Ethernet MAC frame header to achieve closed-loop control of signal monitoring, tag verification, and on-demand wake-up, waking up only the necessary modules to process data frames.

Benefits of technology

It achieves low-power communication, solves the compatibility and cost issues of hybrid architecture, reduces wake-up latency and false wake-up rate, and improves communication reliability and battery life.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of automotive Ethernet technology and discloses a low-power communication method and system suitable for automotive Ethernet. The method includes: dividing wake-up windows for different types of low-power communication frames based on a unified time reference; when the vehicle is in sleep mode, only the wake-up wireless module remains in a low-power listening state, and outputs a wake-up trigger signal when a link signal meeting preset conditions is detected; a low-power frame tag is provided in the reserved control field of the Ethernet MAC frame header; in response to the wake-up trigger signal, only the tag parsing module in the Ethernet MAC chip is woken up; when the low-power frame tag meets preset matching rules and the current time is within the wake-up window, the central processing unit is woken up to process the data frame. This invention solves the problem of blind wake-up in the TC10 physical layer, implements a three-level wake-up linkage logic, and solves the compatibility and cost problems of traditional hybrid architectures.
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