Multi-AP Station Transfer Coordination for Low-Interference Handover

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Solution Overview

Problem

Existing wireless communication networks face challenges in efficiently managing station transfers and resource allocation across multiple access points, leading to suboptimal performance and interference, particularly in environments with multiple basic service sets and ad-hoc networks.

Innovation Solution

Implementing multi-access point coordination mechanisms that utilize specific frames and protocols to facilitate coordinated station transfers and resource allocation, including trigger frames for resource allocation and management frames for action frames, enabling efficient data transmission and reception across multiple access points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If multiple access points independently manage station transfers, then each access point can autonomously control its own resources, but interference and suboptimal performance increase due to lack of coordination

Engineering Contradiction:

Improveautonomous controlVSAvoidtransfer performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent merges the station transfer management functions of multiple access points into a coordinated system. The first access point receives a first frame from a second access point requesting association transfer, and transmits a second frame indicating the transfer. This combining of coordination functions reduces interference and improves transfer performance while maintaining operational efficiency.

Inventive Principle:

Principle #5Merging (Combining)

2Device complexity

If station transfers are managed without coordination between access points, then the system is simpler to implement, but resource allocation becomes suboptimal and interference increases

Engineering Contradiction:

Improvecoordination mechanismVSAvoidresource utilization

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent implements feedback mechanisms through management frames exchanged between access points. The first access point receives transfer requests from the second access point and responds with confirmation frames, creating a feedback loop that optimizes resource allocation and reduces interference without requiring complex centralized control.

Inventive Principle:

Principle #23Feedback

3Ease of manufacture

If access points operate independently, then implementation is easier, but station transfer latency increases due to lack of coordinated handover

Engineering Contradiction:

Improvesystem implementationVSAvoidtransfer latency

Core Design Contradiction:

Ease of manufactureVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the second access point initiate the transfer process before the actual station handover occurs. The second access point transmits the first frame requesting association transfer to the first access point, and the first access point prepares the second frame indicating the transfer in advance, enabling smoother and faster station transitions.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260089668A1Multi-access point coordination for station transfer

Publication Date: 2026.03.26 OFINNO LLC

AI summary

An access point (AP) receives from an overlapping basic service set (OBSS) AP, where the AP and the OBSS AP form a multi-AP group, a first frame: indicating disassociation of a station (STA) by the OBSS AP; and requesting association of the STA with the AP. Based on receiving the first frame, the AP transmits to the STA a second frame indicating association of the STA with the AP.