Honda Motor Co., Ltd.

Yuki Hirono

Daisuke Saito

An in-vehicle communication apparatus connected to a first communication network and a second communication network for relaying a signal to be transmitted and received between the first communication network and the second communication network includes a relay unit configured to relay a signal received from the first communication network to the second communication network, and an illegality determination unit configured to set processing of determining whether the signal to be relayed by the relay unit to the second communication network is an illegal signal to be lighter than processing of determining whether the signal received from the first communication network is an illegal signal.

In-vehicle communication apparatus, vehicle, and method for relaying signals between communication networks

An illegal signal detection apparatus for detecting input of an illegal signal to a communication network for which a signal is expected to be input at a predetermined cycle, the illegal signal detection apparatus including: a measuring unit for measuring, in time series, a time interval among a plurality of continuous signals input to the communication network; and a determination unit for judging, if a time interval between a first signal and a second signal that should be transmitted at the cycle is longer than the cycle, and a signal interval between the second signal and a signal that is input immediately before is equal to or smaller than a predetermined interval, that a competition has occurred when transmitting the second signal to determine that the second signal is an arbitrated normal signal.

Illegal signal detection apparatus, vehicle, and illegal signal detection method

A signal detection apparatus includes a signal detection unit which detects signals expected to be input to a communication network in a predetermined cycle, and a determination unit which determines whether detection timing of a second signal detected by the signal detection unit after a first signal which is set as a reference signal for determining an illegal signal is in a predetermined range within which reference timing falls among the signals detected by the signal detection unit, and whether a shift between the detection timing of the second signal and the reference timing is a first threshold or less, in which the determination unit sets the second signal as the reference signal when the shift is the first threshold or less, and sets the first signal as the reference signal without setting the second signal as the reference signal when the shift exceeds the first threshold.

Signal detection apparatus, vehicle, and method

An in-vehicle equipment includes: a signal detection unit configured to detect a signal expected to be input to a communication network at a predetermined input cycle; a counting unit configured to count the number of times a signal is detected by the signal detection unit; and a determination unit configured to determine whether the number of times counted by the counting unit within a predetermined first period is equal to or less than a threshold value set between a first value calculated by dividing the first period by the input cycle and a second value calculated on the basis of the first period and the input cycle on assumption that an illegal signal is further input to the communication network.

In-vehicle equipment, vehicle, and method

A determination device includes: a signal determination unit configured to determine whether a signal flowing on a communication network in a moving object is abnormal; a transmission source determination unit configured to determine, when the signal determination unit determines that the signal flowing on the communication network is abnormal, whether a communication device which is a transmission source of the abnormal signal is normal; and an attack determination unit configured to determine that an attack on the communication network has occurred, when the signal determination unit determines that the signal flowing on the communication network is abnormal, and the transmission source determination unit determines that the communication device which is the transmission source of the abnormal signal is normal.

Growing community of inventors

Tokyo, Japan

Yuki Hirono