New patent application published for: IN-VEHICLE DEVICE AND IN-VEHICLE SYSTEM

An in-vehicle device used in an in-vehicle system in which a plurality of communication devices are installed is provided. Each of the plurality of communication devices is configured to receive power supply, and each of the power supply paths is provided with a power supply switching unit configured to switch between an ON state and an OFF state. The in-vehicle device is configured to execute switching control to switch the power supply switching unit to either the ON state or the OFF state, and communicate with the plurality of communication devices. The in-vehicle device outputs control information indicating whether the switching control is a switching to the ON state or a switching to the OFF state. The plurality of communication devices stops the transmission process for transmitting communication frames.