Mobile Identification Transmitter with Short-Range NFC Security
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Solution Overview
Problem
Existing mobile identification transmitters for motor vehicles face issues with security, as they can unintentionally trigger safety-relevant functions over long distances and lack secure data transmission separation, making them vulnerable to unauthorized access.
Innovation Solution
A mobile identification transmitter with a communication means that enables data transfer up to 10 cm via NFC standard, allowing the transmission and reception units to be alternatively activated or blocked, ensuring secure and limited-range data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If long-range transmitting and receiving units are used for keyless activation, then ease of operation is improved, but safety-relevant functions can be unintentionally triggered from a distance
Solution Approach 1:
The patent divides the communication system into two separate transmitting and receiving units: one for long-range keyless activation and another for short-range safety-critical communication. This segmentation allows each unit to be optimized for its specific function, with the safety unit limited to short-range operation to prevent unintentional triggering from a distance.
Solution Approach 2:
The patent applies different communication ranges to different functions: long-range communication for convenience functions like door unlocking, and short-range communication for safety-critical functions like airbag control. This local quality approach ensures that safety functions can only be activated when the user is physically present and close to the vehicle.
2Device complexity
If a single transceiver unit is used for both identification and security data transmission, then device complexity is reduced, but reliable separation of security data transmission cannot be achieved
Solution Approach 1:
The patent segments the communication system into separate transmitting and receiving units for different data types. One unit handles identification data transmission over long ranges, while another dedicated unit handles security-relevant data over short ranges only. This physical and functional segmentation ensures reliable separation of security data from other communications.
Solution Approach 2:
The patent introduces a switching element as an intermediary that controls and directs traffic between the different transmitting and receiving units. This switching mechanism ensures that security data is routed through the appropriate short-range channel while preventing mixing with long-range identification communications.
3Ease of operation
If transmitting and receiving units cannot be switched off, then ease of operation is maintained, but data transmissions are vulnerable to theft and unauthorized access
Solution Approach 1:
The patent implements dynamic control of the transmitting and receiving units through a switching element. The units can be alternatively activated or blocked based on operational requirements. This dynamic switching allows the system to maintain ease of operation when needed while providing security by blocking unauthorized access attempts and preventing continuous transmission that could be exploited.
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 solution prevents accidental triggering of safety-relevant functions and secures data transmission by limiting the communication range to 10 cm, preventing unauthorized access and ensuring secure data exchange.
Implementation Method 1
a transmitting and receiving unit 13 with which a long-range connection to a connection unit 41 on the motor vehicle 40 can be established by means of electromagnetic waves
Implementation Method 2
a means of communication 20 to enable data transfer up to a range of less than 10 cm, in particular according to an NFC standard
Data Source
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AI summary
The invention relates to a mobile identification transmitter (10) of a security system for keyless activation of a locking mechanism (43) of a motor vehicle (40), comprising a housing (11) with an electronics unit (12) disposed therein having at least one transmitting and receiving unit (13), the transmitting and receiving unit (13) being connected to a connector (42) in the motor vehicle, said connector providing for an identification test for determining the user’s authorization. According to the invention, the electronics unit (12) comprises a communication means (20) for enabling a data transfer (25, 25') with an external data device (30, 30') only up to a range of up to 10 cm.