Virtual Access Point Handover with Capability Matching

Solution Overview

Problem

In Wi-Fi networks using virtual access points, handovers between heterogeneous physical access points can result in service interruptions due to mismatched capabilities, leading to suboptimal connection quality and potential disconnections.

Innovation Solution

A method and device for managing handovers by assigning a virtual-access-point identifier to a terminal, which involves transmitting terminal capabilities to a controller, and reconfiguring connections based on the capabilities of both the terminal and the new access point to ensure seamless transitions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a terminal switches between physical access points using a virtual access point identifier in a transparent handover manner, then the switching speed and continuity of service are improved, but the connection reliability deteriorates when the physical access points have heterogeneous capabilities

Engineering Contradiction:

Improvehandover speedVSAvoidconnection reliability

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent applies preliminary action by having the terminal report its capabilities to the controller before the handover occurs. The controller stores this capability information and uses it to select an appropriate target access point that is compatible with the terminal's capabilities, thereby preventing connection failures before they happen.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by having the terminal send its capability information (such as Wi-Fi version, bandwidth support) to the controller. The controller uses this feedback to make informed decisions about handover target selection, ensuring that the terminal is transferred to an access point that can support its capabilities.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If the terminal maintains the same virtual access point identifier during handover, then the ease of operation is improved, but the adaptability to different physical access point capabilities deteriorates

Engineering Contradiction:

Improveterminal operation simplicityVSAvoidaccess point capability compatibility

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent uses the controller as an intermediary between the terminal and the physical access points. The controller receives capability information from the terminal, selects an appropriate target access point based on capability matching, and manages the handover process. This intermediary role allows the terminal to operate simply with a virtual identifier while the controller ensures capability compatibility.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The virtual access point identifier serves as a universal interface that works across multiple physical access points with different capabilities. The terminal interacts with the virtual identifier without needing to know the specific capabilities of each physical access point, while the controller ensures that the underlying physical infrastructure is compatible.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If the controller transfers the virtual access point identifier during handover without capability verification, then the productivity of the handover process is improved, but the manufacturing precision of the connection configuration deteriorates

Engineering Contradiction:

Improvehandover efficiencyVSAvoidconnection configuration accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by having the terminal report its capabilities to the controller before the handover occurs. The controller stores this capability information and uses it to select an appropriate target access point that is compatible with the terminal's capabilities, thereby preventing connection failures before they happen.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by having the terminal send its capability information (such as Wi-Fi version, bandwidth support) to the controller. The controller uses this feedback to make informed decisions about handover target selection, ensuring that the terminal is transferred to an access point that can support its capabilities.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12414040B2Switching between physical access points sharing the same virtual access point identifier

Publication Date: 2025.09.09 ORANGE SA

AI summary

A method for managing switching of a terminal between a plurality of physical access points to a Wi-Fi network, a virtual access point identifier dedicated to the terminal being assigned by a controller to a first physical access point, the terminal associating with the first physical access point by a first connection using the virtual access point identifier. The method includes at the first access point: transmitting, from the first physical access point to the controller, information relating to the capabilities of the terminal, receiving an order to switch from the first connection to a second connection established between the terminal and a second physical access point of the plurality using the same virtual access point identifier, the first and the second connections being adapted to the capabilities of the terminal.