WiFi STA Association via Air Time Availability

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Solution Overview

Problem

In dense WiFi network environments, conventional AP association methods lead to channel congestion and inefficient resource utilization due to uneven distribution of load among access points, resulting in network performance degradation.

Innovation Solution

A distributed approach where station devices (STAs) broadcast and measure received power, air time, and data rates from access points (APs), allowing them to select APs with the least remaining air time that can satisfy their throughput requirements, promoting air time fairness and preventing channel overload.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If STAs use strongest signal first association scheme, then association process is simple and fast, but channel congestion occurs and load distribution becomes uneven

Engineering Contradiction:

Improveassociation process simplicityVSAvoidchannel resource utilization efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent changes the association parameter from signal strength (RSSI) to air time availability. STAs scan APs and select the one with the most available air time rather than the strongest signal, fundamentally altering the selection criterion to prevent congestion while maintaining simplicity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

APs broadcast their available air time information to STAs, creating a feedback mechanism where STAs use this information to make informed association decisions. This feedback loop enables load balancing without complex centralized control

Inventive Principle:

Principle #23Feedback

2Area of stationary object

If more APs are deployed in dense environments, then network coverage is improved, but load distribution becomes uneven and performance degrades

Engineering Contradiction:

Improvenetwork coverage areaVSAvoidnetwork performance

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The system enables self-organizing behavior where STAs autonomously select APs based on broadcasted air time information. Each STA independently evaluates available air time and makes association decisions without centralized coordination, allowing dense deployments to self-balance their load distribution

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12192891B2Devices, systems and methods for throughput oriented association with access point devices

Publication Date: 2025.01.07 INFINEON TECHNOLOGIES AMERICAS CORP

AI summary

A method can include, by operation of a station wireless device (STA): receiving a plurality of different broadcast transmissions, determining an air time availability of each of a plurality of access point devices (APs) from data included within the broadcasts, for each of the plurality of APs, estimating a data rate for the STA with respect to the AP from traffic data included in at least one broadcast transmission from the AP, selecting one AP from the plurality of APs based on predetermined traffic metrics for the plurality of APs, and associating with the selected AP. Corresponding devices and systems are also disclosed.