Wireless Radio Power Adjustment for Co-located Interference

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Solution Overview

Problem

Devices with multiple wireless radios, such as those using Wi-Fi and Bluetooth protocols, experience interference when operated simultaneously, leading to degradation in quality and signal strength due to insufficient physical isolation between antennas.

Innovation Solution

The technique involves reducing the transmission power of one wireless radio to mitigate interference with another, by determining a target transmission power based on antenna isolation and signal strength, ensuring that the quality of communications is maintained above a threshold level.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple wireless radios are operated simultaneously, then device functionality and versatility are improved, but interference between radios increases and communication quality deteriorates

Engineering Contradiction:

Improvedevice functionalityVSAvoidinterference between radios

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent dynamically adjusts transmission power parameters of wireless radios based on real-time interference conditions. The system monitors communication quality metrics and modifies power levels to maintain functionality while reducing harmful interference between co-located antennas.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements a feedback mechanism that continuously monitors communication quality and interference levels between wireless radios. Based on this feedback, the system automatically adjusts transmission parameters to optimize performance and minimize mutual interference while maintaining simultaneous operation.

Inventive Principle:

Principle #23Feedback

2Object-affected harmful factors

If transmission power of one wireless radio is reduced, then interference with another radio is decreased, but communication quality and signal strength may deteriorate

Engineering Contradiction:

Improveinterference levelVSAvoidcommunication quality

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The system dynamically adjusts transmission power parameters based on real-time interference conditions and communication quality metrics. By continuously optimizing power levels, the system reduces interference between radios while maintaining signal strength and communication quality above acceptable thresholds.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamic power adjustment where transmission parameters are continuously modified based on real-time monitoring of interference and communication quality. This dynamic approach allows the system to adapt to changing conditions and maintain optimal performance without manual intervention.

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If physical isolation between antennas is increased, then interference between radios is reduced, but device size and complexity increase

Engineering Contradiction:

Improveinterference between radiosVSAvoiddevice size

Core Design Contradiction:

Object-affected harmful factorsVSVolume of moving object

Solution Approach 1:

The system compensates for limited physical separation between antennas by dynamically adjusting transmission power parameters. This allows compact device design while maintaining acceptable interference levels through software-controlled power management rather than requiring large physical distances.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces mechanical/physical isolation solutions with electronic/software-based power control mechanisms. Instead of requiring physically separated antennas, the system uses intelligent power adjustment to achieve interference reduction, enabling compact device form factors.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10123283B1System for reducing interference between communication devices

Publication Date: 2018.11.06 AMAZON TECH INC

AI summary

Interference from communication associated with a first device on communication by a second device may be reduced by modifying the transmission power of the first device. The amount by which the transmission power of the first device is reduced may be determined based on the minimum signal strength value for the first device that maintains a threshold level of quality and the maximum transmission power for the first device that corresponds to a threshold level of interference to the second device. Based on the maximum transmission power, a target change to the transmission power of the first device may be determined. The transmission power of the first device may be reduced by the lesser of: an amount corresponding to the target change or an amount that would reduce the signal strength for the first device to the minimum signal strength value.