Vehicle dormancy awakening method and system, and automotive CAN network gateway

Abstract

The invention provides a vehicle dormancy awakening method. The method comprises the following steps that a gateway awakens all CAN networks after the gateway is awakened under the predetermined conditions; the gateway carries out reception judgement on wake-up signals carried by network management messages of various nodes in all CAN networks within the preset communication time in order to obtain an awakening configuration table for determining whether each CAN network needs to keep awakening; and after the preset communication time is over, the gateway executes a sleep request or keeps an awakening state of the corresponding CAN network according to the awakening configuration table. Through implementation of the invention, the dormancy time between the dormant CAN networks requesting the dormancy can be synchronized, and the awakening state between the CAN networks keeping communication is coordinated, so that the energy loss is reduced.

Description

technical field [0001] The invention relates to the field of automobile CAN network bus technology, in particular to a method and system for waking up a whole vehicle from sleep, and an automobile CAN network gateway. Background technique [0002] At present, the automotive industry generally uses the Internet based on CAN protocol communication, and with the development of automotive electronics technology, there are more and more automotive electronic and electrical components. Based on different device performance or safety considerations, OEMs are no longer satisfied with a single CAN network topology, and often design multiple CAN networks on one vehicle to form a relatively complex network topology. Different sub-networks usually adopt different network management strategies according to different functions to coordinate the dormancy of nodes in the network, so as to reduce energy loss and make the whole vehicle dormant under certain conditions. [0003] However, in t...

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Problems solved by technology

When the CAN network of the whole vehicle meets the determined dormancy conditions, the CAN1 to CAN4 networks perform the dormancy process according to their respective network policies, which will cause the dormancy time of different CAN networks to be out of sync. For example, the CAN2 network has been dormant, but the CAN1 network There are nodes on the network (such as figure 1 Middle ECU1) does not meet the sleep conditions and does not sleep. At this time, if there is a signal on the CAN1 network that needs to be forwarded to the CAN2 network, the forwarding operation cannot be completed, resulting in a decrease in vehicle performance

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