UWB Proximity Validation for Secure Mobile Reader Data Transfer

Solution Overview

Problem

Existing keyless entry systems face inefficiencies due to the need for multiple user devices and security vulnerabilities arising from increased communication ranges, which can lead to unauthorized access through relay attacks and imprecise distance measurements.

Innovation Solution

Utilizing ultra-wideband (UWB) communications technology for secure data transfer between a mobile device and a reader device, involving distance determination based on transmission properties and digital signature verification to ensure authorized access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If NFC communication is used for data transfer, then contactless communication capability is achieved, but the mobile device must remain awake throughout the entire data transfer process which increases power consumption

Engineering Contradiction:

Improvecontactless communication capabilityVSAvoidpower consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The mobile device falls into a suspended state (a form of preliminary sleep mode) before the actual data transfer begins. This suspended state is established in advance to reduce power consumption while still allowing the device to receive data packets from the reader device during the transfer process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The mobile device dynamically transitions between different power states - specifically between a suspended state (low power mode) and an awake state (full power mode). The device alternates between these states during data transfer, being awake only when needed to receive data packets and suspended during intervals to conserve power.

Inventive Principle:

Principle #15Dynamics

2Reliability

If the mobile device remains awake during data transfer, then complete data reception is ensured, but power consumption increases

Engineering Contradiction:

Improvedata reception completenessVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The mobile device falls into a suspended state (a form of preliminary sleep mode) before the actual data transfer begins. This suspended state is established in advance to reduce power consumption while still allowing the device to receive data packets from the reader device during the transfer process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The mobile device dynamically transitions between different power states - specifically between a suspended state (low power mode) and an awake state (full power mode). The device alternates between these states during data transfer, being awake only when needed to receive data packets and suspended during intervals to conserve power.

Inventive Principle:

Principle #15Dynamics

3Use of energy by moving object

If data is transferred in packets with intervals, then power consumption is reduced, but data transfer time increases

Engineering Contradiction:

Improvepower consumptionVSAvoiddata transfer time

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The data transfer process uses periodic action by dividing data into packets sent at regular intervals. The mobile device alternates between awake periods (to receive packets) and suspended periods (to conserve power), creating a rhythmic transfer pattern that balances power consumption with transfer efficiency.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The mobile device dynamically transitions between different power states - specifically between a suspended state (low power mode) and an awake state (full power mode). The device alternates between these states during data transfer, being awake only when needed to receive data packets and suspended during intervals to conserve power.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP3803809B1Method and system for data transfer between a mobile device and a reader device

Publication Date: 2026.05.06 DORMAKABA SCHWEIZ AG

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AI summary

Method, device and system for data transfer between a mobile device (3) and a reader device (2), the method of data transfer comprising: transmitting (S3) a request value from an ultra-wideband communications module (1) to the reader device (2); determining (S4) a distance between the ultra-wideband communications module (1) and the reader device (2); generating (S5) a validation value in the reader device using the request value and transmitting (S6) the validation value from the reader device (2) to the mobile device (3), if the distance is smaller than a predefined value; verifying (S7), in the mobile device (3), the validation value; and enabling (S8), in the mobile device (3), further data transfer (S9) between the mobile device (3) and the reader device (2), upon affirmative verifying of the validation value.