Patent ID: 11951917
Assignee: SUMITOMO WIRING SYSTEMS, LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 2:
3. A switching device comprising:
a switching unit configured to relay, via a plurality of transmission paths, information between a plurality of function devices mounted to a vehicle;
a power source receiving and supplying circuit configured to extract a first power source voltage from a first transmission path; and
a power source supply circuit configured to supply, via a second transmission path, a second power source voltage based on the first power source voltage extracted by the power source receiving and supplying circuit, to at least one of a plurality of the function devices that are connected to the switching device, wherein
the power source supply circuit is capable of switching whether or not to supply the second power source voltage, for each of the plurality of function devices connected to the switching device,
when a new function device is connected to the switching device, the switching device,
transmits a request for a media access control (MAC) address and authentication information to the new function device,
receives the MAC address and the authentication information transmitted by the new function device in accordance with the request,
updates an address table using the MAC address received from the new function device,
receives, in accordance with the authentication information received from the new function device, power source control information indicating whether or not to supply a third power source voltage to the new function device, and
switches whether or not the power source supply circuit supplies the third power source voltage to the new function device, in accordance with the power source control information received by the switching unit.