Reduction of Wake-up Time for Partial Networking in Automotive System

Vehicle manufacturers have been conducting continuous research on energy conservation and efficient energy management of vehicles in accordance with the increased power consumption due to increasing fuel consumption and increasing number of high performance vehicles. Therefore, an alternative energy management system that utilizes the Electric/Electronics (E/E) architecture of the vehicle has attracted attention. 'Partial Networking' is known as a typical energy saving method, made possible by the progress of E/E architecture. A partial network enables the individual wake-up of each node by using a partial Controller Area Network (CAN) transceiver. However, the Electronic Control Unit (ECU) is subject to the constraints of a wake-up time, which is needed to reset the sequence of the microprocessor and the initialization of each module when the ECU initiates wake-up. This is because the partial network proceeds under the control of the regulator in the ECU, whereby the partial network cannot use ECU, as it requires prompt operation when the operating message is received. Therefore, in this paper, we will build an embedded system and experiment environment based on a partial CAN transceiver for the wake-up time measurement in actual partial networking. In addition, we develop an algorithm that reduces the wake-up time by using an embedded system. Finally, we will describe the efficiency of the proposed method by comparing with the existing partial network.