Vehicle UWB Interference Mitigation via Channel and Time-Slot Switching

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Solution Overview

Problem

Existing communication technologies in vehicles, such as Wi-Fi 6E, cause interference with ultra-wideband (UWB) applications, leading to data loss and malfunctions in functions like UWB ranging and presence detection, as WLAN devices are not sensitive enough to detect UWB interference using 'listen before talk' techniques.

Innovation Solution

Implementing UWB receivers to detect interfering radio signals and adjust UWB applications by switching channels or rescheduling to mitigate interference, using principles of 'listen before talk' to avoid or reduce interference with UWB applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If WLAN technology (Wi-Fi 6E) is used for communication in vehicles, then communication capability is improved, but interference with UWB applications occurs causing data loss and malfunctions

Engineering Contradiction:

Improvecommunication capabilityVSAvoidinterference with UWB applications

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system performs a listen-before-talk check before initiating UWB transmission to detect ongoing WLAN communications. By checking for interference in advance and delaying or avoiding UWB transmission when WLAN is active, the system prevents interference before it occurs, resolving the contradiction between maintaining both communication technologies and avoiding their mutual interference

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If WLAN devices apply 'listen before talk' techniques to detect interference, then channel selection is improved, but detection of UWB interference fails due to low sensitivity

Engineering Contradiction:

Improvechannel selectionVSAvoiddetection sensitivity

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

Instead of having WLAN devices perform listen-before-talk (which lacks sensitivity), the patent inverts the approach by having UWB devices perform the listen-before-talk check. The UWB device uses its receiver to detect WLAN transmissions before initiating UWB communication, leveraging the UWB receiver's ability to detect the specific interference patterns that WLAN devices miss, thus resolving the sensitivity problem

Inventive Principle:

Principle #13The other way round (Inversion)

3Device complexity

If UWB applications are executed without interference mitigation, then simplicity is maintained, but data loss and malfunctions occur

Engineering Contradiction:

Improvesystem simplicityVSAvoidUWB application reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system integrates a listen-before-talk mechanism that checks for WLAN interference before initiating UWB applications. This preliminary detection step, performed by the UWB device's receiver, prevents data loss and malfunctions by avoiding transmissions during WLAN activity, thereby improving reliability while maintaining relative system simplicity through a straightforward detection-and-wait protocol

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250365033A1System and Method For Mitigation of Interference on an Ultra-Wideband Application For a Vehicle

Publication Date: 2025.11.27 BAYERISCHE MOTOREN WERKE AG

AI summary

A method for mitigation of interference on an ultra-wideband (UWB) application includes obtaining, using a UWB receiver, information on a radio signal which is suitable to interfere with the UWB application. The method further includes adjusting the UWB application based on the information on the radio signal such that interference with the radio signal is at least mitigated. In at least some embodiments, the UWB application comprises a UWB communication session between a vehicle and a personal communication device.