Toyota Jidosha Kabushiki Kaisha

Yoshiro Hirata

Hiroya Ando

Toshio Kawamura

Masashi Amesara

Shu Ishizuka

Taichi Matsumura

Yutaka Ueda

Yoshifumi Ohmori

Toshio Shimada

Tomomi Kawamura

Yoshifumi Omori

An in-vehicle network system deployed in a vehicle includes a plurality of first nodes configured to perform an operation relevant to a first function in the vehicle, a second node configured to perform an operation relevant to a second function different from the first function in the vehicle; and a relay device configured to relay communication between the first nodes and the second node. The relay device is configured to start relay of communication between the first nodes earlier than the relay of communication between the first node and the second node at a time of startup.

In-vehicle network system, relay device, and method of controlling in-vehicle network system

An in-vehicle network system includes a plurality of controllers configured to perform control of a vehicle, a plurality of transfer paths connected to the controllers, a relay device configured to relay data between the transfer paths, the relay device being connected to the transfer paths, a vehicle state detection unit configured to detect a predetermined state of the vehicle, a first specifying unit configured to specify the controller that transmits data with a low transmission priority in the predetermined state detected by the vehicle state detection unit or a transfer path other than a transfer path that transfers data related to the predetermined state detected by the vehicle state detection unit, and a first communication controller configured to cause the controller specified by the first specifying unit to suppress communication of data or suppress communication of data to the transfer path specified by the first specifying unit.

In-vehicle network system

An on-board network system includes a plurality of controllers connected to a bus, a detecting unit that detects an error that occurs, a measuring unit that measures a degree of error occurrence detected by the detecting unit, and a communication controller that reduces a communication speed and a communication data amount of at least one of the controllers from a first speed and a first data amount to a second speed and a second data amount, when the error occurrence degree becomes equal to or larger than a first degree. The communication controller reduces the communication speed and the communication data amount, such that a first communication time it takes for data to be transmitted at the first speed in the first data amount is longer than a second communication time it takes for data to be transmitted at the second speed in the second data amount.

On-board network system, communication control method in the on-board network system, and on-board gateway

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Toyota, Japan

Yoshiro Hirata