Vehicle-Mounted UWB Ranging Sync for In-Car Signal Attenuation

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Solution Overview

Problem

UWB communication is attenuated by vehicles, preventing seamless service usage and requiring users to rely on narrow mobile device screens instead of wider vehicle screens, limiting its application and convenience.

Innovation Solution

A method and device that synchronize service applications between a vehicle-mounted device and a user's mobile device, establishing a secure channel and sharing encryption keys to enable UWB ranging services through the vehicle's display, using FiRa specifications for secure data transmission and ranging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If UWB communication is used between mobile device and service device outside vehicle, then distance measurement capability is improved, but signal attenuation by vehicle prevents smooth communication

Engineering Contradiction:

Improvedistance measurement capabilityVSAvoidcommunication reliability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent introduces a vehicle-mounted device as an intermediary between the mobile device and service device. This mediator receives synchronization information from the service device, synchronizes service applications locally, and relays communication, thereby overcoming the signal attenuation problem caused by direct communication through the vehicle body.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The communication system is segmented into multiple components: the service device outside the vehicle, the vehicle-mounted device inside the vehicle, and the mobile device carried by the user. Each segment performs specific functions, with the vehicle-mounted device handling local synchronization and the mobile device handling user interaction, thus avoiding the need for direct penetration through the vehicle body.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If UWB communication is performed through vehicle body, then service availability is improved, but signal attenuation occurs preventing smooth operation

Engineering Contradiction:

Improveservice availabilityVSAvoidsignal transmission reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The vehicle-mounted device serves as a mediator that receives synchronization information from external service devices and maintains local service application states. This intermediary approach allows the service to be available inside the vehicle without requiring direct signal penetration through the vehicle body, thus maintaining both service availability and signal reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If service application data is shared between devices, then service continuity is improved, but security risks increase

Engineering Contradiction:

Improveservice continuityVSAvoidsecurity risks

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements preliminary synchronization of service application data between the vehicle-mounted device and mobile device before actual service operations. By pre-establishing synchronized service states and encryption keys, the system ensures service continuity while maintaining security, as the data is already prepared and protected before being accessed during service execution.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system creates copies of service application data and encryption keys across multiple devices (vehicle-mounted device and mobile device) through secure synchronization. These copies enable service continuity across devices while the original security protections are maintained through encrypted transmission and storage of the copied data.

Inventive Principle:

Principle #26Copying

4Object-affected harmful factors

If encryption keys are shared between devices, then security is improved, but device complexity increases

Engineering Contradiction:

Improvesecurity protectionVSAvoidsynchronization process complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges the encryption key management functions into the service application synchronization process. Instead of separate key exchange protocols, the encryption keys are bundled with service application data during synchronization, simplifying the overall process while maintaining strong security through unified encrypted transmission of both data and keys.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12513513B2Method for providing ultra-wideband ranging-based service and device supporting the same

Publication Date: 2025.12.30 SAMSUNG SDS CO LTD

AI summary

A method for providing an ultra-wideband (UWB) ranging-based service and devices supporting the same are provided. The method according to some embodiments includes synchronizing, by a first device, a first service application of the first device with a second service application of a second device based on synchronization information received from the second device, the second service application of the second device being an application configured to perform an operation for a UWB ranging-based service in association with a service device; and performing, by the first device, the operation for the UWB ranging-based service in association with the service device, based on the synchronized first service application.