Wireless Module Interference Mitigation via Frame Exchange Timing

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Solution Overview

Problem

Current wireless devices experience signal interference between Wi-Fi and Bluetooth modules due to inadequate antenna isolation, leading to degraded signal quality even when operating on non-overlapping channels.

Innovation Solution

A wireless communication method where one module sends frame exchange information to the other, including timing of signal transmission and reception, allowing the receiving module to schedule its operations to align with the sender's, thereby minimizing interference by coordinating signal transmission and reception times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If wireless modules use non-overlapping channels with FDD method, then channel separation is improved, but signal interference still occurs due to transmitting signal degrading receiving signal

Engineering Contradiction:

Improvesignal interferenceVSAvoidsignal quality

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent applies preliminary action by having the first wireless module obtain frame exchange information from the second wireless module before actual communication occurs. This includes acquiring timing information about signal transmission and reception schedules, allowing the first module to pre-calculate optimal transmission times that avoid interference with the second module's reception periods.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by enabling dynamic scheduling of transmission times based on real-time frame exchange information. The system adjusts transmission timing flexibly according to the actual communication needs and interference conditions, rather than using fixed time slots, allowing optimization of signal quality while maintaining communication reliability.

Inventive Principle:

Principle #15Dynamics

2Volume of moving object

If antenna isolation is reduced to improve compactness, then device size is reduced, but interference between wireless modules worsens

Engineering Contradiction:

Improvedevice sizeVSAvoidinterference between modules

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent introduces frame exchange information as an intermediary mechanism that coordinates between the two wireless modules. This information acts as a mediator that enables timing alignment and interference avoidance, allowing the system to compensate for reduced antenna isolation through intelligent scheduling rather than relying solely on physical isolation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements feedback by having the first wireless module continuously obtain frame exchange information from the second module during operation. This feedback loop allows real-time adjustment of transmission timing based on actual communication conditions, enabling the system to maintain signal quality despite compact antenna placement with reduced isolation.

Inventive Principle:

Principle #23Feedback

3Device complexity

If wireless modules operate independently without coordination, then device complexity is reduced, but signal transmission and reception alignment is poor leading to increased interference

Engineering Contradiction:

Improvemodule coordination complexityVSAvoidsignal interference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent applies universality by designing a multi-functional frame exchange information structure that serves multiple purposes: it provides timing information for transmission scheduling, enables interference avoidance, and maintains communication alignment. This single information mechanism handles multiple coordination requirements without significantly increasing system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system implements self-service by enabling each wireless module to autonomously obtain and process frame exchange information from the other module. The modules independently calculate optimal transmission times and adjust their own operations without requiring external coordination or complex centralized control, maintaining simplicity while achieving effective interference avoidance.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11540297B2Wireless communication method and associated wireless device

Publication Date: 2022.12.27 MEDIATEK INC

AI summary

The present invention provides a wireless communication method of a wireless device, wherein the wireless device includes a first wireless module and a second wireless module, and the wireless communication method includes the steps of: using the first wireless module to receive frame exchange information from the second wireless module, wherein the frame exchange information comprises timing of signal transmission and signal reception of the second wireless module; and scheduling signal transmission and signal reception of the first wireless module according to the frame exchange information of the second wireless module.