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Bandwidth reservation method for occasional message of intelligent connected automobile TSN network

An episodic, intelligent network technology, applied in network traffic/resource management, services based on specific environments, vehicle components, etc., to solve problems affecting safe and smooth operation, unguaranteed schedulability, and wasted bandwidth.

Active Publication Date: 2020-07-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the reserved bandwidth is too high, it will easily cause bandwidth waste and the total message transmission time will be longer
If the allocated bandwidth is too small, its real-time performance and schedulability cannot be guaranteed, affecting normal, safe and stable operation

Method used

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  • Bandwidth reservation method for occasional message of intelligent connected automobile TSN network
  • Bandwidth reservation method for occasional message of intelligent connected automobile TSN network
  • Bandwidth reservation method for occasional message of intelligent connected automobile TSN network

Examples

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Embodiment Construction

[0068] In this embodiment, a bandwidth reservation method for sporadic messages in the TSN network of intelligent networked vehicles, such as figure 1 As shown, this method constructs a real-time frequency coupling formula for message classification for various messages in the TSN network of intelligent networked vehicles, and establishes sporadic real-time message and non-sporadic real-time message models; As a condition, find the boundary area where the bandwidth of sporadic real-time messages can be reserved; take this boundary area as the search area, and aim at the minimum total transmission time of various messages in the switch, traverse to find the sporadic real-time messages and non-sporadic messages. The optimal reserved bandwidth value; specifically, it is carried out according to the following steps:

[0069] Step 1. Obtain vehicle TSN network information;

[0070] Collect the set M of all messages in the TSN network of intelligent connected vehicles, among which...

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Abstract

The invention discloses a bandwidth reservation method for an occasional message of an intelligent connected automobile TSN network, and the method comprises the steps: building a real-time frequencycoupling formula of message classification for various types of messages of the intelligent connected automobile TSN network, and building an occasional real-time message model and a non-occasional real-time message model; taking the schedulability of a time key data queue in the TSN switch as a condition, and solving a boundary domain of a bandwidth which can be reserved by an accidental real-time message; and taking the boundary domain as a search area, taking the minimum total transmission time of various messages in the switch as a target, and traversing to search optimal reserved bandwidth values of accidental real-time messages and non-accidental messages. According to the method, the strong real-time random transmission requirement of the TSN accidental real-time message can be met,the TSN has good comprehensive transmission time, and the safe and high-reliability operation of each key system of the intelligent networked automobile can be ensured.

Description

technical field [0001] The invention relates to the technical field of intelligent network-connected vehicle vehicle TSN network, in particular to a bandwidth reservation method for sporadic messages of the intelligent network-connected vehicle TSN network. Background technique [0002] With the rapid development of automobile intelligence and networking in recent years, electronic systems such as advanced driver assistance systems and automatic parking systems are gradually applied to complete vehicles. At the same time, the number of automotive electronic components such as electronic control units, ultrasonic sensors, image sensors, and radars has increased significantly. The traditional CAN and FlexRay buses are difficult to meet the high bandwidth, high scalability, and low-cost network development requirements, so the vehicle TSN network emerges as the times require. [0003] The TSN network, formerly known as the Ethernet AVB network, is used to transmit audio and vi...

Claims

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Application Information

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IPC IPC(8): H04W4/40H04W24/02H04W28/20H04W28/26
CPCH04W4/40H04W28/20H04W28/26H04W24/02
Inventor 王跃飞黄飞马伟丽王志袁富林吴源
Owner HEFEI UNIV OF TECH
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