Method for monitoring operation state of overall network in network structure of control area network

A technology for controlling local area network and network structure, applied in the field of monitoring the running status of the entire network, it can solve the problem that real-time performance cannot be guaranteed, and achieve the effect of ensuring real-time performance and accuracy

Inactive Publication Date: 2011-06-29
BYD CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Since the existing CAN network monitoring method cannot guarantee real-time performance when monitoring network nodes with increasing numbers and increasingly complex network communications, the present invention proposes a method for monitoring the operating status of the entire CAN network

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  • Method for monitoring operation state of overall network in network structure of control area network
  • Method for monitoring operation state of overall network in network structure of control area network
  • Method for monitoring operation state of overall network in network structure of control area network

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Embodiment Construction

[0009] A general automotive CAN network includes a network management node and a plurality of other network nodes that play a master role. In an embodiment of the present invention, as figure 1 As shown, the automotive CAN network can include a power battery manager, an on-board charger or an external charger, a motor controller, an engine electronic control unit (ECU), a transmission ECU, a main controller, and a DC / DC converter. The power battery manager is the network management node, and the other modules are the other network nodes, and the modules including the power battery manager are coupled to each other through the power network bus. The following will combine figure 1 The shown CAN network structure describes the content of the present invention in detail. It should be pointed out that each module listed in this embodiment is only for the purpose of illustrating the embodiment, and does not play a limiting role, so that the content of the present invention also It...

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Abstract

The invention provides a method for monitoring an operation state of an overall network in the network structure of a control area network (CAN). The CAN comprises a network management node and a plurality of other network nodes. The method comprises the following steps of: sending clock messages to one or more network nodes periodically by using the network management node; responding to the clock messages transmitted by the network management node, calculating the number of data frames transmitted to a power network bus in each time period, and transmitting the number of the transmitted data frames to the network management node by using each of the one or more network nodes; receiving the number of the transmitted data frames and calculating a network load in at least one time period by utilizing the number of the transmitted data frames by using the network management node; and judging the operation state of the overall network according to the network load in the at least one time period.

Description

technical field [0001] The invention relates to a network monitoring method of an automobile control local area network (CAN) network, in particular to a method for monitoring the running state of the entire network in a CAN network structure. Background technique [0002] CAN is a serial data communication bus developed by German Bosch in 1986 to solve the data exchange between many measurement and control components in automobiles. Up to now, today's CAN network system has played an irreplaceable role in the automobile industry. role. [0003] For rechargeable dual-mode hybrid electric vehicles, there are many electronic control modules and complex network communication. The vehicle CAN communication network is divided into power network and body network, which requires high reliability. Most of the existing CAN networks do not have active monitoring functions, and cannot detect bus node failures and abnormal network performance in time. It may have little impact on netwo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/26H04L12/28
Inventor 宋俊俊王超王柯
Owner BYD CO LTD
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