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System for managing wakeup and sleep events of computers connected to a motor vehicle can network

A technology of motor vehicles and computers, applied in the direction of transmission system, bus network, network interconnection, etc.

Inactive Publication Date: 2011-11-23
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a powerful host computer must be provided to minimize these risks

Method used

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  • System for managing wakeup and sleep events of computers connected to a motor vehicle can network
  • System for managing wakeup and sleep events of computers connected to a motor vehicle can network
  • System for managing wakeup and sleep events of computers connected to a motor vehicle can network

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Experimental program
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Embodiment Construction

[0016] in figure 1 with 2 In this, the main CAN network 10 of the motor vehicle is connected to the secondary CAN network 12 via a gateway 14.

[0017] The master CAN network 10 includes a master computer 16 and slave computers 20-22 connected to a CAN bus 24. The secondary CAN network 12 includes slave computers 28-30 connected to a CAN bus 32, and the gateway 14 is connected to both the CAN bus 24 and the CAN bus 32.

[0018] The host computer 16 manages the wake-up and sleep events of each slave computer 18, 20, 22, 26, 28, 30.

[0019] The wake-up and sleep of the slave computers 18, 20, 22 of the master CAN network 10 are usually realized by the master computer 16 sending a control frame to each slave computer that needs to be awakened or hibernated ( figure 1 ). Each slave computer that has received its own frame then returns a frame to the host computer 16 to confirm successful reception ( figure 2 ).

[0020] According to the present invention, in order to reduce the number...

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Abstract

The invention relates to a system for managing wakeup and sleep events of computers (26, 28, 30) connected to a motor vehicle secondary CAN network (12), said secondary CAN network (12) being connected to a main CAN network (10) by means of a gateway (14). The system comprises a master computer (16) which is connected to the main CAN network (10) and capable of managing the wakeup and sleep events of the computers (26, 28, 30) through the exchange therewith of wakeup and sleep frames via the gateway (14). According to the invention, the gateway (14) can: synthesize a single wakeup and sleep frame on the basis of several wakeup and sleep frames emitted by the computers (26, 28, 30), and emit this single frame to the master computer (16) which is configured to interpret said frame.

Description

Technical field [0001] The invention relates to the management of sleep and wake events of computers in a CAN (Control Area Network) network of motor vehicles. Background technique [0002] As is known, in motor vehicles, many functional entities are electrically controlled by means of a computer (injection system, braking system, air conditioning system, wiper, etc.). [0003] For reasons of safety or simplified design, motor vehicles are usually equipped with several CAN networks interconnected via gateways. [0004] In addition, some computer-controlled vehicle functional entities are intermittent, such as so-called "comfort" functional entities such as air conditioning systems, wipers, and power windows. In order to save energy, when the vehicle functional entity is not in use, the associated computer sleeps and then wakes up when needed. [0005] The wake-up and sleep commands for the vehicle computer are usually processed centrally by a dedicated computer called the "main" comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L2012/40215H04L2012/40273H04L12/40039H04L12/46H04L12/66
Inventor J·罗谢J-Y·斯蒂诺
Owner RENAULT SA
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