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Method of improving transmission rate of CAN network in automobile and system

A transmission rate and network technology, applied in the field of automotive CAN, can solve the problems that multiple target networks cannot be refreshed at the same time, affecting the efficiency of multiple network node refreshes, etc., to achieve and improve bandwidth, increase transmission rate, and meet the needs of network capacity Effect

Active Publication Date: 2015-08-26
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For the diagnosis network, when refreshing the network nodes online, because the bandwidth of the diagnosis network is the same as that of the target network, only a single network node can be refreshed, and multiple target networks cannot be refreshed at the same time, which affects multiple Efficiency of simultaneous refreshing of network nodes

Method used

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  • Method of improving transmission rate of CAN network in automobile and system
  • Method of improving transmission rate of CAN network in automobile and system
  • Method of improving transmission rate of CAN network in automobile and system

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Embodiment 1

[0040] This embodiment provides a kind of processing flow of the method for improving the transmission rate of the CAN network in the car as Figure 4 As shown, the following processing steps are included:

[0041] Step S410 , extending the level corresponding to the data field of the standard frame of the CAN network through the driving circuit of the CAN network in the vehicle.

[0042] The embodiment of the present invention adjusts the drive circuit of the transceiver of the CAN network in the car, and adds a voltage adjustment module on the basis of the original drive circuit. The drive of the transceiver of the CAN network in the car after this embodiment provides a kind of improvement The structure diagram of the circuit is as Figure 5 shown. exist Figure 5Among them, two voltage adjustment modules are connected in series with the drive module. The voltage adjustment module is mainly used to adjust the level between the two buses CAN_H and CAN_L, which mainly inclu...

Embodiment 2

[0049] This embodiment provides a kind of system that improves the transmission rate of the CAN network in the automobile, and its specific realization structure is as follows Figure 8 As shown, it can specifically include the following modules:

[0050] The level expansion module 81 is used to expand the level corresponding to the data field of the standard frame of the CAN network through the driving circuit of the CAN network in the car,

[0051] The data field expansion module 82 is used to make each bit in the data field of the standard frame of the CAN network represent at least two bits of data;

[0052] The data transmission module 83 is configured to transmit data through the standard frame of the extended CAN network.

[0053] Further, the level extension module 81 is specifically used to add a voltage adjustment module in the driving circuit of the transceiver of the CAN network in the car, and the voltage adjustment module is connected in series with the driving ...

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Abstract

The embodiment of the invention provides a method of improving a transmission rate of a CAN network in an automobile and a system. The method mainly comprises steps: level corresponding to a data field of standard frames of the CAN network is expanded through a CAN network driving circuit in the automobile to enable each one in the data frame of standard frames of the CAN network to express at least two-bit data; and the data are transmitted through the expanded CAN network standard frame. According to the embodiment of the invention, through expanding the level of the data field of the standard frames of the CAN network in the automobile, each one in the data frame of standard frames of the CAN network transmits two-bit data, capacity of effective data can be effectively expanded on the basis of not influencing the prior bus structure, the transmission rate and the bandwidth of the standard frames of the CAN network are doubled, and requirements of the prior functions on the network capacity can be met.

Description

technical field [0001] The present invention relates to the technical field of automotive CAN (Controller Area Network, controller area network), in particular to a method and system for improving the transmission rate of the CAN network in the automobile. Background technique [0002] In the development of automobiles, with the continuous increase of electronic equipment, the number of wires is continuously increasing, and the requirements for real-time and reliability of communication between systems are also getting higher and higher. In order to meet the requirements of high-speed data communication and reduce the number of wiring harnesses, the CAN bus has been widely used and has become the main application standard of the current automotive network. With its high reliability and low price, CAN bus will continue to be used in automobiles for a long time. [0003] A typical application topology diagram of a CAN network in a car in the prior art is as follows: figure 1...

Claims

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Application Information

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IPC IPC(8): H04L29/08
Inventor 胡绪良
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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