Channel Assignment for Wireless Coexistence

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Solution Overview

Problem

Wireless communication systems face challenges in efficiently allocating channels to different groups of wireless devices sharing bandwidth, particularly in scenarios with co-channel coexistence and interference from higher-tier operators, leading to uneven transmission limitations across groups.

Innovation Solution

A method and apparatus for evaluating transmission limitations due to higher-tier protection in wireless communication networks, allowing for the assignment of channels to each group to minimize unfair limitations and optimize bandwidth usage, using techniques such as bipartite graph formulations and optimization algorithms to ensure fair and efficient channel allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If channels are assigned to different groups of wireless devices sharing bandwidth, then bandwidth utilization is improved, but transmission limitation due to higher-tier protection becomes uneven across groups

Engineering Contradiction:

Improvebandwidth utilizationVSAvoidtransmission limitation fairness

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent applies local quality by evaluating transmission limitations specific to each group of wireless devices based on their geographic locations and interference characteristics with higher-tier operators. Each group receives a channel assignment optimized for its local conditions, ensuring fair transmission capabilities across different locations rather than applying a uniform assignment strategy.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter of channel assignment by evaluating multiple possible assignments and selecting the one that optimizes transmission limitation fairness. The system dynamically adjusts channel allocations based on calculated interference levels and transmission limitations, transforming static channel assignment into an adaptive process that responds to varying interference conditions.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If channel assignment optimizes for one group, then that group's performance is improved, but other groups experience increased transmission limitations

Engineering Contradiction:

Improvegroup performanceVSAvoidinterference to other groups

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent merges the performance optimization of multiple groups into a single evaluation process. Instead of optimizing for one group at a time, the system evaluates channel assignments considering the combined impact on all groups simultaneously, selecting an assignment that balances performance across all groups while minimizing overall transmission limitations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent converts the harmful effect of interference into a beneficial evaluation criterion. By calculating transmission limitations caused by higher-tier protection and using these calculations to guide channel assignment, the system transforms interference from an uncontrollable detriment into a measurable parameter that drives optimized allocation decisions.

Inventive Principle:

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

3Productivity

If multiple operators share the same bandwidth, then spectrum efficiency is improved, but interference management complexity increases

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidinterference management

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces an intermediary evaluation process that mediates between multiple operators sharing bandwidth. The system calculates transmission limitations and uses these intermediate calculations to determine optimal channel assignments, acting as a mediator that balances the interests of different operators and manages interference automatically without requiring complex direct coordination between operators.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10506595B2Incumbent protection consideration for intra-GAA channel assignment

Publication Date: 2019.12.10 QUALCOMM INC

AI summary

Aspects of the present disclosure relate to methods and apparatus for allocating (or assigning) channels to different groups of wireless nodes in the case of co-channel coexistence between the different groups and interference to one or more other wireless nodes. One example method generally includes evaluating, for different assignments of channels to different groups of wireless devices that share bandwidth, an amount of transmission limitation imposed due to higher-tier protection, and assigning one or more of the channels to each of the groups, based on the evaluation.