V2X Interference Sharing for Wi-Fi-Aware C-V2X Reception

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Solution Overview

Problem

Existing wireless communication systems face challenges in effectively detecting and mitigating Wi-Fi interference affecting vehicle-to-everything (V2X) links, which can degrade the sensitivity and decoding ability of C-V2X receivers due to high interference-to-noise ratios caused by Wi-Fi and other out-of-band emissions.

Innovation Solution

Implementing a method for sensor sharing of Wi-Fi interference detection among user equipments (UEs) where a first UE detects interference and transmits a message to a second UE via a V2X communication link, allowing the second UE to adjust its communication parameters to compensate for the interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If Wi-Fi and other out-of-band emissions are present in the communication environment, then wireless communication systems can operate in unlicensed spectrum bands, but the interference-to-noise ratio increases causing degradation of C-V2X receiver sensitivity and decoding ability

Engineering Contradiction:

Improveability to operate in unlicensed spectrum bandsVSAvoidinterference-to-noise ratio

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary interference detection by having UEs scan for Wi-Fi and other out-of-band emissions before V2X communication occurs. Detection results are shared proactively with other UEs in the vicinity, enabling them to take preventive measures such as adjusting reception parameters or avoiding vulnerable time-frequency resources before interference degrades performance

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements continuous feedback loops where UEs monitor interference conditions, report detection results to the network and neighboring UEs, and receive feedback for adjusting their transmission and reception parameters. This closed-loop approach allows dynamic adaptation to changing interference conditions while maintaining communication quality

Inventive Principle:

Principle #23Feedback

2Reliability

If a first UE detects RF interference and transmits a message to a second UE via the V2X communication link, then the second UE can adjust communication parameters to compensate for interference, but the complexity of interference detection and message coordination increases

Engineering Contradiction:

Improveinterference detection and mitigation capabilityVSAvoidinterference detection scheme complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Each UE is equipped with autonomous interference detection capabilities and can independently scan for Wi-Fi and out-of-band emissions, process detection results, and generate appropriate compensation actions without requiring complex centralized coordination. The system leverages the self-service capability of individual UEs while sharing detection information to achieve collective interference mitigation

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent introduces standardized interference indication messages that act as intermediaries between detecting UEs and affected UEs. These messages carry essential interference information (presence, strength, type) in a standardized format, simplifying the coordination complexity by providing a universal interface for interference information exchange without requiring complex peer-to-peer negotiation protocols

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If interference detection thresholds are modified and modulation and encoding schemes are adjusted, then C-V2X communication performance can be maintained in interfered conditions, but the processing overhead and computational requirements increase

Engineering Contradiction:

ImproveC-V2X communication performanceVSAvoidprocessing overhead

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts communication parameters including modulation schemes, encoding rates, and detection thresholds based on detected interference conditions. When Wi-Fi interference is detected, the system switches to more robust modulation and coding schemes; when out-of-band emissions are detected, it adjusts detection thresholds accordingly. These parameter changes are performed adaptively to maintain communication performance while managing processing overhead through selective application

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12526065B2Techniques for sensor sharing of wi-fi interference detection

Publication Date: 2026.01.13 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. Techniques described herein provide for sharing detection of radio frequency interference among user equipments (UEs). If a first UE detects radio frequency interference affecting a vehicle-to-everything (V2X) link, the first UE may transmit a V2X message to a second UE indicating that the first UE detected the radio frequency interference. The second UE may adjust V2X communications in order to compensate for the radio frequency interference or modify radio frequency interference detection schemes.