基于环视系统的车载以太网时延评估与分析

张宇1， 高雅洁1， 薛燕芳2， 黄晨3， 洪俊3

江苏大学学报（自然科学版） ›› 2020, Vol. 41 ›› Issue (4) : 411-418.

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江苏大学学报（自然科学版） ›› 2020, Vol. 41 ›› Issue (4) : 411-418. DOI: 10.3969/j.issn.1671-7775.2020.04.007
论文

基于环视系统的车载以太网时延评估与分析

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Evaluation and analysis of automotive ethernet delay based on surround view system

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摘要

基于音视频桥接（AVB）协议理论，搭建以BMW G38的360°环视系统和RAD_Galaxy为核心的试验台，运用Vehicle Spy软件采集一系列的报文数据，同时也借助Wireshark软件分析报文组成结构、交互过程，以获得报文的关键信息，通过对时间戳的处理计算，实现对车载以太网时延的评估与分析.试验表明： 能够在成功抓获并破解环视系统的报文数据的基础上，结合AVB协议，分析得出理论时延值，其对于试验台所抓获报文的时延分析方法，适用于所有以太网报文的时延分析.

Abstract

Based on the theory of AVB protocol,  a test bench with 360° surround view of BMW G38 was established with RAD_Galaxy as core.A series of message data were collected by Vehicle Spy, and the message structure and interaction process were analyzed by Wireshark to obtain the key information of received messages. The automotive ethernet delay was evaluated and analyzed by processing and calculating the timestamp. The results show that the theoretical delay value can be analyzed based on the successful capturing and cracking of the message data of the surround view system and the AVB protocol. The time delay analysis method for the captured messages on the test bench is applicable to the time delay analysis of all ethernet messages.

关键词

  / 车载以太网 / 时延 / 测试 / AVB / 时间戳

Key words

automotive ethernet / delay / test / AVB / timestamp

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张宇1, 高雅洁1, 薛燕芳2, 等. 基于环视系统的车载以太网时延评估与分析[J]. 江苏大学学报（自然科学版）, 2020, 41(4): 411-418 https://doi.org/10.3969/j.issn.1671-7775.2020.04.007
ZHANG Yu1, GAO Yajie1, XUE Yanfang2, et al. Evaluation and analysis of automotive ethernet delay based on surround view system[J]. Journal of Jiangsu University(Natural Science Edition), 2020, 41(4): 411-418 https://doi.org/10.3969/j.issn.1671-7775.2020.04.007

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基金

上海汽车工业科技发展基金资助项目(1737)

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