Coordinated Spatial Reuse Lists for Wi-Fi Interference Control

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Solution Overview

Problem

Existing wireless communication networks face challenges in managing interference and throughput degradation due to unregulated medium sharing among geographically close access points, leading to reduced communication quality and efficiency.

Innovation Solution

Implementing coordinated spatial reuse (CSR) techniques with restricted medium sharing, where access points determine and share medium usage with compatible nodes, broadcasting lists to reduce interference and ignore channel occupancy time periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If unregulated medium sharing is used among geographically close access points, then device complexity is reduced, but interference levels increase and communication quality deteriorates

Engineering Contradiction:

Improvemedium sharing management complexityVSAvoidinterference levels

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the medium sharing process by introducing CSR lists that categorize other APs into compatible and incompatible groups. This segmentation allows regulated sharing only within compatible groups, reducing interference while maintaining manageable complexity through structured classification rather than complete regulation of all interactions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by treating different AP relationships differently through CSR lists. Compatible APs can share the medium regulatedly, while incompatible APs cannot, creating locally optimized sharing behavior based on the specific characteristics of each AP pair rather than applying uniform regulation to all interactions.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If unregulated medium sharing is used among geographically close access points, then ease of operation is improved, but throughput degradation occurs

Engineering Contradiction:

Improvemedium sharing operation simplicityVSAvoidthroughput

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent applies preliminary action by having APs pre-determine CSR lists indicating compatible and incompatible APs before medium sharing occurs. This pre-classification enables regulated sharing to proceed automatically based on pre-established compatibility information, maintaining operational simplicity while preventing throughput-degrading interference from incompatible APs.

Inventive Principle:

Principle #10Preliminary action

3Object-affected harmful factors

If coordinated spatial reuse with restricted medium sharing is implemented, then interference levels are reduced, but device complexity increases

Engineering Contradiction:

Improveinterference levelsVSAvoidCSR list management complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies self-service by enabling each AP to autonomously determine and maintain its own CSR list based on local measurements and decisions. This self-determination mechanism reduces the need for centralized coordination complexity while still achieving interference reduction through distributed regulated sharing among compatible APs.

Inventive Principle:

Principle #25Self-service

4Reliability

If coordinated spatial reuse with restricted medium sharing is implemented, then communication quality is improved, but signaling overhead increases

Engineering Contradiction:

Improvecommunication qualityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent applies partial action by implementing regulated sharing only for compatible APs identified through CSR lists, rather than regulating all possible AP interactions. This partial application of coordination mechanisms reduces the total signaling overhead required compared to comprehensive regulation, while still significantly improving communication quality for the subset of compatible AP pairs.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20260059327A1Coordinated spatial reuse with restricted medium sharing

Publication Date: 2026.02.26 QUALCOMM INC

AI summary

This disclosure provides methods, components, devices and systems for coordinated spatial reuse (CSR) with restricted medium sharing. Some aspects more specifically relate to a CSR framework. In some examples, access points (APs) may each create a first list of APs that either indicates compatible APs for CSR or incompatible APs for CSR, and may broadcast the first list of APs to the APs. Each AP may generate one or more final lists based on the first lists, where each final list may indicate a subset of the APs that are each compatible with each other for CSR. A sharing AP may transmit an SP announcement that indicates a final list of APs and one or more reuse SPs, and APs included in the final list of APs may communicate with respective STAs during the reuse SPs based on receiving the SP announcement.