CAN network system and packet transmission control method

A network system and message transmission technology, applied in the field of communications, can solve the problems of CAN network congestion, large amount of upper-layer network messages, and insufficient processing capacity of CAN converters, and achieve the effect of reducing operating frequency and improving message response speed.

Inactive Publication Date: 2015-11-25
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional CAN converters are only triggered, and forward the received lower-layer network messages to the upper-layer network. If there are many lower-layer network nodes (battery simulation boards), the amount of messages in the lower-layer network is large, and the processing capacity of the CAN converter is not enough. , many messages from the lower network nodes cannot be forwarded to the upper network, resulting in frame loss. At the same time, the amount of messages in the upper network is relatively large, and the CAN network may cause congestion.

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  • CAN network system and packet transmission control method
  • CAN network system and packet transmission control method
  • CAN network system and packet transmission control method

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Embodiment Construction

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0019] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention provides a packet transmission control method based on a CAN network system. The method comprises the steps that a CAN converter receives CAN packets sent by a number of network nodes; the type of the CAN packets is analyzed; if the CAN packets are the first type, the CAN packets are sent to a monitoring host; if the CAN packets are the second type, the CAN packets are written into corresponding transmitting buffer areas; and the CAN converter sequentially sends the CAN packets in a number of transmitting buffer areas to the monitoring host according to a predetermined period. According to the packet transmission control method based on the CAN network system, which is provided by the invention, CAN network congestion can be effectively avoided, and the packet response speed is improved. The invention further provides the CAN network system.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a CAN network system and a message transmission control method based on the CAN network system. Background technique [0002] At present, various functional devices in many vehicles communicate through the CAN network, which requires the CAN network to be stable and reliable, and to be able to transmit various messages in a timely manner. However, due to the large number of messages transmitted on the CAN bus, sometimes the CAN network is blocked. For example: for electric vehicles, it is necessary to monitor the working status of multiple single cells of the power battery (the single cells can be simulated through the battery simulation board), and the messages sent by multiple single cells need to be transmitted to the monitoring host. Each single battery is equivalent to a network node in the CAN network, and it is recommended that there are no more than 32 network no...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/861H04L12/40
Inventor 高挺沈晓峰
Owner BYD CO LTD
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