US 11,962,433 B2
Switch device, in-vehicle communication system, and communication method
Akihito Iwata, Osaka (JP); Tatsuya Izumi, Osaka (JP); Hirofumi Urayama, Osaka (JP); Tadashi Matsumoto, Yokkaichi (JP); Darmawan Go, Yokkaichi (JP); Hideki Maeda, Yokkaichi (JP); Takeshi Hagihara, Yokkaichi (JP); Masashi Amesara, Toyota (JP); Hisashi Furukawa, Toyota (JP); Shu Ishizuka, Toyota (JP); and Hideki Goto, Toyota (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP); SUMITOMO WIRING SYSTEMS, LTD., Yokkaichi (JP); AUTONETWORKS TECHNOLOGIES, LTD., Yokkaichi (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Appl. No. 17/911,668
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); Autonetworks Technologies, Ltd., Yokkaichi (JP); and Toyota Jidosha Kabushiki Kaisha, Aichi (JP)
PCT Filed Feb. 2, 2021, PCT No. PCT/JP2021/003772
§ 371(c)(1), (2) Date Sep. 15, 2022,
PCT Pub. No. WO2021/186925, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 2020-044877 (JP), filed on Mar. 16, 2020.
Prior Publication US 2023/0141041 A1, May 11, 2023
Int. Cl. H04L 12/46 (2006.01); B60R 16/023 (2006.01)
CPC H04L 12/4645 (2013.01) [B60R 16/023 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A switch device used in a vehicle in which a plurality of function units and a diagnosis device are installed, the switch device comprising:
a plurality of communication ports;
a memory; and
a processor coupled to the memory and configured to:
relay a frame, which has been transmitted from a function unit and to which information including an ID (Identifier) of a VLAN (Virtual Local Area Network) is added, to another function unit via a communication port;
determine that the frame is to be duplicated based at least in part on a source address and a destination address of the frame;
when the diagnosis device is connected to another switch device, duplicate the frame to be relayed via a designated communication port among the plurality of communication ports, and generate a duplicate frame for diagnosis that is a frame obtained by adding, to a duplicate frame obtained through the duplication, specific information indicating that the duplicate frame for diagnosis should be transmitted to the diagnosis device;
store a diagnosis flag provided for each frame; and
when the specific information has been added to the frame received by the processor from the other switch device, determine that the frame received is the duplicate frame for diagnosis, and set, to ON, a diagnosis flag of the frame that has been determined as the duplicate frame for diagnosis, wherein
when the diagnosis flag is ON, the processor outputs the duplicate frame for diagnosis from a communication port corresponding to the diagnosis device among the plurality of communication ports.