On-vehicle data communication system and method

摘要

An on-vehicle data communication system is provided with at least one master unit, a plurality of slave units and a communication bus. Each of the slave units is provided with: a first receiving device for receiving broadcast communication data through the communication bus; a first judgement device for judging whether or not the first receiving device failed to normally receive the broadcast communication data; and a first transmission device for transmitting acknowledge data to indicate a failure in reception of the first receiving device, if the first judgement device judges that the first receiving device failed to normally receive. The master unit is provided with: a second transmission device for transmitting the broadcast communication data to the slave units; a second receiving device for receiving the transmitted acknowledge data; a second judgement device for judging whether or not the acknowledge data corresponding to the transmitted broadcast communication data are received by the second receiving device; and a process control device for performing a predetermined process to cope with the failure of the first receiving device.