Vehicle Access Control via Mobile Terminal Interrogation
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Solution Overview
Problem
Existing vehicle access control systems using low frequency technology require users to carry specific cards, limiting access to those without low frequency communication means and compromising security for users with mobile terminals lacking such capabilities.
Innovation Solution
A method utilizing an electronic control unit that sends interrogation messages to a mobile terminal, requiring validation via short or medium range communication protocols like Bluetooth, ensuring authorized access without proximity verification, and allowing secure access even if the terminal is not in immediate proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low frequency technology is used for proximity verification, then security against unauthorized access is improved, but compatibility with mobile terminals without low frequency communication means deteriorates
Solution Approach 1:
The patent introduces an intermediary validation mechanism where the mobile terminal acts as a mediator between the user and the vehicle access control system. The terminal receives interrogation messages from the vehicle, validates the user's authorization status, and sends validation messages back. This intermediary approach allows the system to work with standard mobile terminals that lack low frequency communication capabilities while maintaining security through the validation message exchange.
2Ease of operation
If communication range is extended beyond immediate proximity, then ease of operation is improved, but verification of user presence deteriorates
Solution Approach 1:
The system performs preliminary actions by sending interrogation messages to the mobile terminal before granting access. The mobile terminal validates the user's authorization status in advance and prepares a validation message. This preliminary validation ensures that even when the communication range extends beyond immediate proximity, the system can verify user authorization before allowing access to vehicle functions.
Data Source
AI summary
The invention relates to a method for controlling access to at least one function of a motor vehicle (10), comprising: —an action step during which an electronic control unit (11) on board the motor vehicle detects an interaction of a user with the motor vehicle, —a verification step during which the electronic control unit verifies that the user is authorized to access said function, and —an authorization step during which the electronic control unit authorises access to said function. According to the invention, said verification step comprises sending of a query message by said electronic control unit to a mobile terminal (20) carried by the user or by a person accompanying the user, and said authorisation step is only implemented if, in response to the query message, the electronic control unit receives an access-right validation message from the mobile terminal.