Wireless Interference Mitigation via uAPSD Timing

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Solution Overview

Problem

Microwave ovens generate radio interference that disrupts wireless communication, leading to increased error rates and decreased data throughput in nearby electronic devices.

Innovation Solution

Implementing mitigation techniques such as unscheduled automatic power save delivery (uAPSD) and power save mode management to reduce the impact of microwave interference on wireless communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If microwave ovens operate, then cooking function is provided, but radio interference is generated that disrupts wireless communication

Engineering Contradiction:

Improvecooking functionVSAvoidradio interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary mechanism (interference mitigation module) that mediates between the microwave oven's operation and wireless communication. This module detects microwave interference and dynamically adjusts communication parameters or timing to avoid interference periods, allowing both cooking and communication to function simultaneously without direct conflict

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If wireless communication is performed near microwave ovens, then data transmission is enabled, but error rates increase due to interference

Engineering Contradiction:

Improvewireless communication capabilityVSAvoiderror rate

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system dynamically adjusts communication parameters based on detected microwave interference conditions. It monitors the electromagnetic environment and adapts transmission timing, power levels, or protocol parameters in real-time to maintain reliable communication despite varying interference levels from microwave operations

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements a feedback mechanism where the system continuously monitors communication quality and microwave interference levels, then uses this information to adjust transmission parameters. Error rate feedback triggers parameter changes that optimize communication reliability in the presence of microwave interference

Inventive Principle:

Principle #23Feedback

3Reliability

If data transmission is repeated due to interference, then communication reliability is maintained, but data throughput decreases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoiddata throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system performs preliminary actions by detecting microwave operation patterns and proactively scheduling data transmissions during known non-interference periods. By anticipating interference cycles and planning transmissions in advance during safe time windows, it avoids the need for retransmissions while maintaining high throughput

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12316389B1Mitigation of microwave interference

Publication Date: 2025.05.27 AMAZON TECH INC

AI summary

Systems, methods, and computer-readable media are disclosed for mitigating microwave interference in electronic devices. Example devices may include memory and at least one processor configured to access the memory and execute computer-executable instructions to determine that a microwave source is inactive, transmit a second message to the access point requesting the access point to send the data, receive, from the access point, the data buffered during the first duration, and transmit a third message to the access point, the third message cancelling the buffer request of the first message.