Passive entry systems, such as passive entry-passive start vehicle systems, using short-range wireless communication signals to determine a distance between nomadic devices and unlockable devices based on a round trip time of flight (TOF) measurement.

An electronic key system determines that legitimate communication has been performed on the basis of conditions including that a measured distance from a ranging request unit to a ranging response unit measured on the basis of a ranging request signal and a ranging response signal is within a threshold range that is set on the basis of the distance from a communication area of a transmission antenna where an electronic key is determined to be located by a key location determination unit to one of either the ranging request unit or the ranging response unit that is provided in an on-board device.

Computer systems for training a machine learning model for preventing relay attacks. Including portable electronic devices capable of controlling the opening or closing, contactlessly, of an access to a road vehicle on the basis of a pretrained machine learning model. The general principle is based on the use of smartphones as a digital key for accessing a road vehicle. Machine learning is used to train a learning model capable of predicting the movement of a smartphone of this type as it approaches or moves away from the road vehicle. Subsequently, access to the road vehicle is authorized only when same receives the information on the movement of the smartphone.

An actuation system used to actuate two buttons on a remote control device, such as a key fob, based upon commands that are generated from a mobile device. The actuation system includes an outer housing that defines an isolation enclosure. The actuation system includes a support frame that allows the vertical position of the button actuator to be manually adjusted. The lateral and longitudinal position of the actuator can also be manually adjusted, as can the distance between a pair of actuator tips. The controller receives the command signals from the mobile device and converts the command signals into actuation commands that are used to activate a servo motor to move the one of two actuation tips into contact with one of the buttons of the key fob. The system includes a RF receiver and transmitter to communicate a vehicle command signal for receipt by the vehicle.

A communication device mounted at a vehicle, the communication device including: a blocking section that, in a case in which communication with a second mobile device that is different from a first mobile device that transmits key information for the vehicle is interrupted, performs a blocking process to block an unlocking of the vehicle or a starting of the vehicle that is performed based on received key information.

A method of transmitting signals from a first node having multiple transceivers to a second node is disclosed. The method comprises receiving a message from the second node at the first node, wherein the message is received by each of a plurality of transceivers of the first node; and transmitting by each of the plurality of transceivers a respective data frame to the second node in response to the message; wherein each transceiver initiates the transmission of its respective data frame a predetermined time period after receipt of the message by the transceiver; and wherein the transmissions of the data frames from the plurality of transceivers overlap. The data frames may form part of a two-way ranging exchange.

Disclosed are Ethernet-based vehicle control system and method. The system includes: a router for connecting a vehicle internal network and a vehicle external network when the vehicle internal network is formed by connecting an engine and a vehicle electronic element including a controller and a sensor; and a remote start module for performing remote start based on a remote start signal transmitted from a remote controller through the vehicle external network, wherein whether or not to perform the remote start is determined based on drive system state information generated by the vehicle electronic element and transferred via the router. When performing a remote start is controlled in response to an engine RPM during the remote start, efficient management of engine protection and fuel consumption can be achieved. When performing a remote start is controlled in response to the position of the transmission, safe remote start can be achieved.

System and techniques for a secure wireless lock-actuation exchange are described herein. After receiving a request to actuate a lock from a device, a controller can calculate a challenge counter and then perform verification iterations until an end condition is met—which is a failure of a verification iterations or the number of iterations reaches the challenge count. If the verification iterations reach the challenge count (e.g., there are no failed iterations), then the controller actuates the lock. Each iteration includes an exchange between the device and the controller that the device validates by signing a message with a private key shared by the device and the controller. The exchange also includes a freshness value integrated into the device validation to prevent replay attacks.

Communication with a key fob of a vehicle can be controlled based on a key fob jamming condition. One or more sensors can be configured to detect the key fob jamming condition. In response to the key fob jamming condition being detected, a jamming device can be activated to cause one or more jamming signals to be emitted. The one or more jamming signals can prevent the key fob from receiving and responding to other signals.

Passive entry systems, such as passive entry-passive start vehicle systems, using short-range wireless communication signals to determine a distance between nomadic devices and unlockable devices based on a round trip time of flight (TOF) measurement.