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Method and device for reducing frame loss in vehicle gateway forwarding

A car network and frame loss technology, which is applied in the direction of bus network, data exchange network, data exchange through path configuration, etc., can solve the problem of frame loss, achieve the effect of increasing data storage speed, increasing data forwarding speed, and reducing programs

Active Publication Date: 2022-08-05
SUZHOU ZHIJIA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for reducing frame loss in vehicle gateway forwarding, which can effectively solve the frame loss problem when the gateway forwards a large amount of data

Method used

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  • Method and device for reducing frame loss in vehicle gateway forwarding
  • Method and device for reducing frame loss in vehicle gateway forwarding

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Method for reducing frame loss in vehicle gateway forwarding

[0031] A method for reducing frame loss in forwarding by a vehicle gateway, comprising the following steps:

[0032] Step 10: the microcontroller MCU receives the control command sent by the performance controller SOC, and parses the control command into a CAN message to be sent to the vehicle CAN network;

[0033] The microcontroller MCU converts the received Ethernet message (control command) into a CAN message, or directly receives the CAN message through the CAN network.

[0034] Step 15: The microcontroller MCU judges whether the data in the second cache is empty, if so, go to Step 20; if not, go to Step 30;

[0035] The second cache (software cache) is a cache space independently set on the RAM of the microcontroller MCU.

[0036] Step 20: The microcontroller MCU judges whether the data in the first buffer is full, and if not, stores the CAN message in the first buffer; if so, goes to step 30;

[00...

Embodiment 2

[0045] Device for reducing frame loss in vehicle gateway forwarding

[0046] Including a microcontroller MCU and a performance controller SOC, the microcontroller MCU is used to receive the control instructions sent by the performance controller SOC, and parse the control instructions into CAN messages to be sent to the vehicle CAN network ,

[0047] The microcontroller MCU includes a first cache and a second cache, the first cache is the CAN hardware cache of the microcontroller MCU, and the second cache is independently set on the RAM of the microcontroller MCU cache space;

[0048] The microcontroller MCU preferentially stores the received CAN message in the first cache, and when the first cache is full, stores it in the second cache; if the second cache is also full, abandons the CAN message message storage. .

[0049] The microcontroller MCU first determines whether the data in the second buffer is empty, and if not, stores the data in the second buffer.

[0050] The...

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Abstract

The invention relates to a method and device for reducing frame loss in the forwarding of a vehicle gateway. A microcontroller MCU receives a control instruction sent by a performance controller SOC, and parses the control instruction into a CAN message to be sent to the vehicle CAN network. ; The microcontroller MCU judges whether the data in the first buffer is full, if not, then the CAN message is stored in the first buffer; The microcontroller MCU judges whether the data in the second buffer is full, if not, The CAN message is then stored in the second buffer; if so, the storage of the CAN message is abandoned. The invention can effectively solve the frame loss problem that occurs when the gateway forwards a large amount of data.

Description

technical field [0001] The invention relates to a method and a device for reducing frame loss in the forwarding of a vehicle gateway. Background technique [0002] With the popularization of the vehicle domain controller architecture, the gateway function is becoming more and more important as part of the domain controller function. At present, the overall architecture of the domain controller is a combination of microcontroller MCU + performance controller SOC. The MCU is equipped with the Autosar operating system, which is mainly responsible for the real-time tasks of the vehicle, and the CAN, LIN and Ethernet networks of the vehicle. For communication; and the Soc is equipped with a QNX or Linux operating system, which is mainly responsible for the computing-related tasks of the domain controller. [0003] The gateway function is deployed on the MCU. The main task is to read the signal from the CAN network of the vehicle and send it to the SOC through Ethernet for data c...

Claims

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Application Information

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IPC IPC(8): G05B19/042H04L12/40
CPCG05B19/0423H04L12/40006H04L2012/40215G05B2219/25257
Inventor 吴道龙于晨笛刘海旗
Owner SUZHOU ZHIJIA SCI & TECH CO LTD