Vehicle Security Activation Using UWB Distance Verification
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Solution Overview
Problem
Existing vehicle security systems, particularly Keyless-Go systems, face challenges in accurately determining the distance between the mobile identification transmitter and the vehicle, leading to unreliable and costly security measures against manipulation and theft.
Innovation Solution
A method using wide-band communication signals, such as ultrawideband (UWB), for precise distance determination and localization, ensuring the ID transponder is within a specific security zone before activating security functions, thereby enhancing security and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elaborate security mechanisms are implemented to protect against relay station attacks, then security is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex mechanical/electronic security mechanisms with a radio-based distance determination system. By using signal propagation time measurement of radio waves to calculate distance between the ID transmitter and vehicle, the system achieves reliable security verification without elaborate mechanical security devices, thus improving security while reducing device complexity
Solution Approach 2:
The patent introduces radio wave signal propagation time as an intermediary measurement parameter. Instead of directly implementing complex security verification mechanisms, the system uses the intermediate step of measuring signal travel time to determine distance, which then serves as the basis for security authentication, thereby simplifying the overall security system
2Reliability
If distance determination is performed using conventional methods, then security measures are provided, but measurement precision is insufficient and results can be manipulated
Solution Approach 1:
The patent changes the measurement parameter from conventional imprecise distance measurement methods to radio signal propagation time. By measuring the time it takes for radio waves to travel between transmitter and receiver and calculating distance based on the known speed of radio wave propagation, the system achieves high-precision, manipulation-resistant distance determination that reliably verifies actual physical distance
3Reliability
If complex security mechanisms are implemented to determine actual distance, then security is improved, but cost increases
Solution Approach 1:
The patent replaces expensive complex security mechanisms with a cost-effective radio-based distance measurement system. By utilizing standard radio communication infrastructure and simple time measurement electronics to determine distance and verify security, the system achieves reliable security authentication at significantly lower manufacturing and implementation costs
Solution Approach 2:
The patent employs inexpensive radio signal transmission and time measurement components rather than expensive elaborate security hardware. The system uses readily available radio communication technology and simple electronic timers to achieve secure distance verification, making the security system affordable and easy to manufacture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach provides a reliable and cost-efficient means to authenticate and authorize the activation of vehicle security functions, preventing unauthorized access by ensuring the ID transponder is within a defined distance, thus enhancing security and comfort.
Implementation Method 1
Determining at least one distance information about a distance of a mobile identification transmitter (ID transponder) to the vehicle by a distance determination by means of at least one wide-band communication signal of a communication
Data Source
AI summary
The invention relates to a method (100) for an activation of at least one security function of a security system (200) of a vehicle (1), wherein an authentication at the security system (200) of the vehicle (1) is effected by means of a mobile identification transmitter (300).