Communication relay device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKazuya Sugiyama, Hiroya Andou, Daisuke Takaishi, Shingo Tomida
Life of this patent
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Abstract
A communication relay device relays transmission and reception of data between a plurality of control devices on an in-vehicle network. The communication relay device determines that communication is abnormal when an index value indicating a traffic volume per unit time of the data being relayed is greater than a specified value. The communication relay device acquires service information for each of the control devices, the service information being information indicating a type of a function being executed by the control device. The communication relay device sets a value of the specified value according to a plurality of pieces of the acquired service information.
Claims7
A communication relay device comprising:
- a processor configured to:
- relay transmission and reception of data between a plurality of target control devices on an in-vehicle network;
- acquire a first measured data traffic volume per unit time flowing from a data communication module (DCM) to the communication relay device via a first external bus;
- calculate an index value based on the first data traffic volume per unit time, the index value indicating a ratio of the measured first data traffic volume per unit time to an upper limit value of the first data traffic volume per unit time flowing from the DCM to the communication relay device via the first external bus;
- and
- acquire service information from each of the target control devices, the service information of each target control device indicating a type function executed by the respective target control device, and set a specified value according to a plurality of pieces of the acquired service information, wherein the processor determines that an unauthorized intrusion into the in-vehicle network has occurred when the calculated index value is greater than the specified value.
A communication relay device comprising:
- a processor configured to:
- relay transmission and reception of data between a plurality of target control devices on an in-vehicle network;
- acquire a measured first data traffic volume per unit time flowing from a data communication module (DCM) to the communication relay device 10 via a first external bus;
- and
- calculate an index value based on the first data traffic volume per unit time, the index value indicating a ratio of the measured first data traffic volume per unit time to an upper limit value of the first data traffic volume per unit time flowing from the DCM to the communication relay device via the first external bus;
- determine an operation mode in which a vehicle is operating;
- output instruction signals corresponding to the identified operation mode to the plurality of target control devices to control the plurality of target control devices to execute functions according to the instruction signals;
- and
- sets a specified value according to the identified operation mode of the vehicle, wherein the processor determines that an unauthorized intrusion into the in-vehicle network has occurred when the calculated index value is greater than the specified value.
Dependencies are inferred from the claim text.