Method for operating a radio-based passive locking device of a motor vehicle and such a locking device

Abstract

The invention relates to a method for operating a radio-based passive locking device (10) of a motor vehicle (11) and to such a locking device, by which at least one access function of the motor vehicle (11) can be released , wherein the radio-based passive locking device (10) has as components a mobile device (12) configured as a radio key unit and a transceiver (14) on the motor vehicle (11), between which at least two Electromagnetic radio signals (13, 15) for an electromagnetic radio link and for operation, respectively, change the parameters of the radio link of the radio-based passive locking device (10). As a parameter, change the identification features ( 30), and for this purpose are respectively set to the current value, and only when the corresponding identification feature (30) has the current value, the release of the access function is carried out.

Description

technical field [0001] The invention relates to a method for operating a radio-based passive locking device of a motor vehicle, which prevents unauthorized signal range extensions. Background technique [0002] Radio-based passive locking devices offer the user of a motor vehicle the possibility and advantage of providing or releasing access functions of the motor vehicle, such as locking or starting the doors of the motor vehicle, even without inserting the key into the ignition switch. Features. In particular, it offers the advantage that access functions can be provided to the user even without a button press or similar interaction on the radio key of the locking device. However, a disadvantage of radio-based locking devices is that security gaps may exist in that unauthorized third parties may also use unauthorizedly generated radio signals or signal extensions of the radio signals of radio-based passive locking devices. , Using the access function of the motor vehicle...

AI Technical Summary

Problems solved by technology

[0009] Especially when using a mobile device, i.e. a mobile phone or smartphone, as the radio key unit of the locking device, the use of ultrasonic signals is disadvantageous for the plausibility test, since mobile devices commonly available on the market cannot generate ultrasonic signals

Due to the limited functionality of the transceivers of mobile devices, i.e. the transmitting and receiving units of electromagnetic radio signals, mobile devices are also only capable of frequency changes within a limited range

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