Method for transmitting data via a serial communication bus, bus interface and computer program

A serial communication bus and data transmission technology, applied in transmission systems, data exchange networks, digital transmission systems, etc., can solve the problems of limited data rate, high resource overhead, long waiting time, etc., and achieve low hardware cost and good interoperability performance and keep hardware costs down

Active Publication Date: 2019-01-18
VOLKSWAGEN AG
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This disadvantage becomes more and more serious because the achievable data rates are always limited in CAN bus technology due to the special bus access method
[0006] Another obvious disadvantage of using ISO TP: The use of stateful point-to-point connections (zustandsbehaftete Punkt-zu-Punkt Verbindungen) according to ISO TP to transmit data
[0007] Another disadvantage when using ISO TP to enable IPv6 communication via CAN FD is that due to the use of the principle of stateful point-to-point connections, very long waiting times occur when transmitting data
To date, IPv6 communication has hardly been used in the automotive sector because it implies a high resource overhead

Method used

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  • Method for transmitting data via a serial communication bus, bus interface and computer program
  • Method for transmitting data via a serial communication bus, bus interface and computer program
  • Method for transmitting data via a serial communication bus, bus interface and computer program

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Embodiment Construction

[0041] This specification shows the principles of the disclosure according to the present invention. Therefore, it should be understood that those skilled in the art can design different arrangements, which although not explicitly described herein, still embody the principles of the disclosure according to the present invention, and should also be protected within its scope.

[0042] CAN bus has been standardized in 1994. The corresponding ISO standard has the number ISO11898. There is a standard for the high-speed range up to 1 Mbit / s, which is the standard ISO 11898-2. Then, there is a standard for the low-speed range up to 125 kBit / s, which is the standard ISO 11898-3. As the amount of data continues to increase, higher and higher bus loads are generated on the CAN bus. This led to the further development of the CAN bus. The extended CAN bus is known under the conceptual CAN FD bus. FD here stands for Flexible Data Rate (Flexible Data Rate). Switch the data rate in this ...

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Abstract

The invention relates to a method for transmitting data via a serial communication bus, a bus interface and a computer program. An extension of the existing CAN FD data transmission protocol is related. The extension enables the use of the IPv6 protocol for the CAN bus. The CAN FD protocol is further developed in an incompatible way. One modification measure relates to the lengthening of the DataField, which is positioned in the transmission frame after an Arbitration Field. An arbitrary number of bytes can be entered in the extended Data Field within a specified upper limit. Since the Data Field is transmitted at a higher bit rate field than the Arbitration Field, the data throughput is increased dramatically.

Description

Technical field [0001] The present invention relates to the technical field of serial data transmission between electronic components networked via a bus system, especially control equipment, sensors and actuators. These control devices are widely used in automobiles. Networked control devices, sensors and actuators are also used in other technical fields, such as automation technology, process technology, and so on. The invention also relates to a correspondingly designed bus interface and a correspondingly designed computer program. Background technique [0002] A large number of control devices are installed in modern vehicles. For the transmission chain alone, multiple control devices are used, such as engine control devices, transmission control devices, ESP control devices, chassis control devices, and other control devices. In addition, there are other control devices that are installed in the vehicle body and provide specific comfort functions. Examples include door c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42
CPCG06F13/4282H04L12/40084H04L12/40156H04L12/4135H04L2012/40215G06F13/376H04L12/40032H04L12/4013H04L12/40163H04L1/004H04L2012/40273H04L12/40143H03M13/09
Inventor A.迈耶
Owner VOLKSWAGEN AG
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