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Vehicle-mounted Ethernet AVB reserved bandwidth optimal configuration method

A technology that reserves bandwidth and optimizes configuration. It is used in data exchange networks, digital transmission systems, electrical components, etc., and can solve the problems of wasting Ethernet AVB network communication bandwidth and network unschedulable.

Active Publication Date: 2018-08-17
HEFEI UNIV OF TECH
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AI Technical Summary

Problems solved by technology

However, the value of the reserved bandwidth allocated by the stream reservation protocol in the Institute of Electrical and Electronics Engineers (IEEE, InSCitute of Electrical and Electronics Engineers) standard is fixed. In the case of a small network transmission load, it is undoubtedly a great waste of Ethernet AVB The communication bandwidth of the network, and in some cases may also cause the network to be unschedulable

Method used

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  • Vehicle-mounted Ethernet AVB reserved bandwidth optimal configuration method
  • Vehicle-mounted Ethernet AVB reserved bandwidth optimal configuration method
  • Vehicle-mounted Ethernet AVB reserved bandwidth optimal configuration method

Examples

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Embodiment Construction

[0061] Such as figure 1 Shown, a kind of vehicular Ethernet AVB reserved bandwidth optimization configuration method, this method comprises the steps of following sequence:

[0062] (1) Establish a hybrid scheduling mechanism containing SC messages;

[0063] (2) Establishing a reserved bandwidth parameter optimization model;

[0064] (3) Solve the reserved bandwidth parameter optimization model;

[0065] (4) Calculate the upper bound of the response time.

[0066] Described step (1) specifically refers to:

[0067] On the basis of Type A SR messages and Type B SR messages in the IEEE802.1Qat protocol, introduce security-critical control flow SC messages, design time blocking mechanisms for A, B, and SC messages, and calculate the upper bounds of response times for various messages. Use the hybrid scheduling bandwidth configuration method to allocate the bandwidth of A, B, and SC message flows, and realize real-time mixed scheduling of various message flows in the network; ...

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Abstract

The invention relates to a vehicle-mounted Ethernet AVB reserved bandwidth optimal configuration method. The method comprises the following steps in order: (1) establishing a hybrid scheduling mechanism containing a SC message; (2) establishing a reserved bandwidth parameter optimization model; (3) resolving the reserved bandwidth parameter optimization model; and (4) computing an upper limit of the response time. The network model containing the SC message proposed by the invention has higher reliability and real-time capacity in the transmission of a safety key message, and the transmissionrequirement of the key control information in the vehicle-mounted network is more satisfied, and the response time upper limit analysis on the above basis considers the response time of the improved network model, and the precision is higher.

Description

technical field [0001] The invention relates to the technical field of vehicle Ethernet audio and video bridging, in particular to a vehicle Ethernet AVB reserved bandwidth optimization configuration method. Background technique [0002] With the development of the automobile industry, automobiles are gradually transforming into informatization and intelligence, and people have also put forward new requirements for the comfort, safety and entertainment of automobiles. Therefore, a series of applications with high-tech content and good user experience have emerged in the automotive industry, such as advanced assisted driving system ADAS, intelligent visual safety application system and Telematics. While these systems have brought a series of technological revolutions to the automotive industry, they pose challenges to the bandwidth of the vehicle network due to the use of a large number of cameras, sensors and multimedia entertainment devices. Traditional CAN networks cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L29/08
CPCH04L41/0823H04L67/12Y02T10/40
Inventor 王跃飞吴源郭中飞刘白隽孙召辉郑成
Owner HEFEI UNIV OF TECH
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