Wireless Coexistence Channel Switching for In-Band Isolation

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Solution Overview

Problem

Existing wireless communication devices face challenges in coexistence within the same frequency band due to insufficient in-band isolation, leading to RF interference and inefficient operation, particularly when configured in 'receive ON always' modes, limiting their usability and performance.

Innovation Solution

Wireless communication devices dynamically switch between Time Division Multiplexing (TDM) and parallel modes by utilizing extreme channels to increase in-band isolation, enabling parallel operation without interference through channel switching and isolation analysis.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple wireless technologies operate in the same frequency band, then frequency band utilization is improved, but RF interference increases

Engineering Contradiction:

Improvefrequency band utilizationVSAvoidRF interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically switches between TDM mode and parallel mode based on real-time isolation conditions. When in-band isolation is sufficient, parallel mode enables simultaneous transmission; when isolation deteriorates, TDM mode prevents interference. This dynamic adaptation resolves the contradiction by adjusting operational characteristics according to environmental conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters (transmission timing, channel selection, power levels) based on measured in-band isolation values. By monitoring isolation parameters and adjusting transmission parameters accordingly, the system maintains coexistence while maximizing frequency band utilization.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If TDM mode is used for co-existence operation, then RF interference is reduced, but communication efficiency deteriorates

Engineering Contradiction:

ImproveRF interferenceVSAvoidcommunication efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The system transitions from static TDM operation to dynamic mode selection, switching between TDM and parallel modes based on real-time isolation measurements. This enables the system to achieve high efficiency when conditions permit while maintaining low interference when conditions deteriorate.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses measured in-band isolation conditions to determine operational mode. By converting isolation measurements into operational decisions, the system transforms what could be a limiting factor into a control parameter that enables optimized performance.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If in-band isolation is increased through channel switching, then parallel operation is enabled, but device complexity increases

Engineering Contradiction:

Improveparallel operation capabilityVSAvoidchannel switching complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system performs self-assessment of in-band isolation conditions and autonomously selects appropriate channels and operational modes. By implementing self-measurement and self-adjustment, the system reduces the need for external control while enabling parallel operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously measures in-band isolation and uses this feedback to adjust channel selection and operational mode. This closed-loop control enables parallel operation when isolation is sufficient while automatically preventing interference when isolation deteriorates.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250317923A1Techniques for co-existence operation with increased in-band isolation

Publication Date: 2025.10.09 INFINEON TECHNOLOGIES AMERICAS CORP

AI summary

First and second wireless communication device configured to operate in a time-division multiplexing (TDM) co-existence mode using first and second channels, respectively, of a first pair of channels in a frequency band are identified. A processing device determines an in-band isolation between the first pair of channels in the frequency band is insufficient to support operation of the first and second wireless communication devices in a parallel co-existence mode. The processing device determines an in-band isolation between a second pair of channels in the frequency band is sufficient to support operation of the first and second wireless communication devices in the parallel co-existence mode. The first wireless communication device is operated in the parallel co-existence mode using a first channel of the second pair of channels with the second wireless communication device configured to operate in the parallel co-existence mode using a second channel in the second pair of channels.