Vehicle-mounted system, management device, and management method

A management device that manages power consumption in a vehicle-mounted system that includes a first vehicle-mounted device and a second vehicle-mounted device that are connected to a communication bus, wherein when, in a low-power state where power consumption is low, the first vehicle-mounted device has received first data or second data via the communication bus, a state of the first vehicle-mounted device transitions to a high power state whose power consumption is larger than the power consumption in the low power state, when, in a low-power state where power consumption is low, the second vehicle-mounted device has received the first data via the communication bus, a state of the second vehicle-mounted device is maintained in the low power state, and when, in the low-power state, the second vehicle-mounted device has received the second data via the communication bus, a state of the second vehicle-mounted device transitions to a high power state whose power consumption is larger than the power consumption in the low power state,

• wherein the management device includes a processing unit for executing processing, and
• the processing unit instructs transmission of the first data via the communication bus to cause the state of the first vehicle-mounted device to transition to the high power state while keeping the second vehicle-mounted device in the low power state, and instructs transmission of the second data via the communication bus to cause the states of the first vehicle-mounted device and the second vehicle-mounted device to transition from the low power state to the high power state.

A management method that manages power consumption in a vehicle-mounted system that includes a first vehicle-mounted device and a second vehicle-mounted device that are connected to a communication bus, wherein when, in a low-power state where power consumption is low, the first vehicle-mounted device has received first data or second data via the communication bus, a state of the first vehicle-mounted device transitions to a high power state whose power consumption is larger than the power consumption in the low power state, when, in a low-power state where power consumption is low, the second vehicle-mounted device has received the first data via the communication bus, a state of the second vehicle-mounted device is maintained in the low power state, and when, in the low-power state, the second vehicle-mounted device has received the second data via the communication bus, a state of the second vehicle-mounted device transitions to a high power state whose power consumption is larger than the power consumption in the low power state,

• the management method causing a computer to execute:
• a step of instructing transmission of the first data via the communication bus to cause the state of the first vehicle-mounted device to transition to the high power state while keeping the second vehicle-mounted device in the low power state;
• and
• a step of instructing transmission of the second data via the communication bus to cause the states of the first vehicle-mounted device and the second vehicle-mounted device to transition from the low power state to the high power state.