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Local dormancy awakening method for CAN bus star network management architecture scheme

A CAN bus and network management technology, applied in the field of partial sleep wake-up, can solve the problems of increasing vehicle battery power consumption, waste of resources, etc., and achieve the effect of reducing power consumption and preventing power loss

Active Publication Date: 2019-02-12
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The biggest disadvantage of OESK network management lies in synchronous wake-up and synchronous dormancy, because as the number of controllers on the vehicle increases, the number of nodes with network management functions will also increase. If the owner only performs a simple function (such as opening the door Take the bag), according to the OESK network management strategy, all nodes with network functions in the vehicle will be awakened, and will go to sleep after a period of time, resulting in waste of resources and increasing the power consumption of the vehicle battery

Method used

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  • Local dormancy awakening method for CAN bus star network management architecture scheme

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Embodiment 1

[0046] When a network segment has five ECU modules: PEPS (keyless entry), BCM (body controller), MP5 (central navigation), HVAC (air conditioning controller) and AVM (360 panoramic camera), the whole After the car is powered off and set aside for a period of time, the above five ECU modules carried by the car will go into network sleep and low-power operation mode.

[0047] According to the logical relationship between each other's network communication, we divide the above five controllers into two groups. Group A has BCM and PEPS, of which BCM is the master node of group A; group B has three controllers of MP5, HVAC and AVM, of which MP5 is Group B master nodes.

[0048] When the car owner leaves the vehicle and powers off the vehicle (commonly known as "locking the car"), the controllers of Group A and Group B enter the dormant mode at this time, but then the owner suddenly drops his file package on the car, at this time the owner If it is necessary to disarm the whole veh...

Embodiment 2

[0051] In the present invention, the partial sleep wake-up start bit (ST bit as shown in Table 1) is designed, which is 0x01 (open state) in the default state, that is, the CAN network opens the partial sleep and wake-up functions, and this function can be displayed on the instrument. Set the button for the driver to turn it on and off manually. When the driver turns it off manually, ST=0x00 at this time, the CAN network no longer has partial sleep and wake-up functions, and it can enter the traditional OESK network management. But when the battery voltage of the vehicle is lower than 10% of the normal voltage (under normal circumstances, the engine generates electricity when the vehicle is started, the battery voltage will not drop, and the battery will lose power only when it is left standing for a long time), this time Sometimes, the partial sleep and wake-up function of the CAN network will be forcibly turned on to ensure the endurance of the battery.

[0052] In the prese...

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Abstract

The invention discloses a local dormancy awakening method for a CAN bus star network management architecture scheme. The method comprises the following steps that a CAN network management message anda plurality of controllers corresponding to multiple operations are provided, wherein the CAN network management message is based on an OESK network management message format and is provided with a destination address (DA) and a network management state bit CF; and when a vehicle executes the operation, only the controller related to the operation is awakened by the CAN network management message,and the controller unrelated to the operation is not awakened and is still in a dormant state in order to reduce the number of the awakened controllers. According to the method, the number of the awakened controllers is reduced to the minimum value through the local network dormant awakening, and the lack of electricity of a storage battery is effectively prevented.

Description

technical field [0001] The invention relates to a partial sleep wake-up method of a CAN bus star network management framework scheme. Background technique [0002] At present, CAN bus network management is widely used in the whole vehicle. With the continuous upgrading of automobile technology, the number of on-board controllers continues to increase, which makes the static power consumption of the vehicle continue to increase. In order to reduce the static power consumption of the vehicle, it is necessary to quickly access the network. Dormant state to prevent the vehicle from running out of power. [0003] The CAN bus in the prior art mainly uses the OSEK network management strategy. The biggest features of this strategy are: [0004] 1. Use chain rules to "bundle" all network management nodes to sleep and wake up; [0005] 2. Use synchronous wake-up and synchronous sleep to control the sleep wake-up function of all network management nodes to ensure that the vehicle can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
CPCH04L12/40006H04L12/40039H04L2012/40215H04L2012/40273
Inventor 龚存昊王玮杨法松刘晓军陈龙
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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