Wi-Fi Station Handover Using Carrier Position Sensing
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Solution Overview
Problem
Existing Wi-Fi steering methods for switching stations between access points rely on RSSI values, which are imprecise, leading to potential errors in determining the appropriate access point for mobile stations.
Innovation Solution
Establish a logic link between a Wi-Fi station and its carrier using Wi-Fi radar signals to determine the station's position, allowing for more precise switching decisions by triangulation and comparison with the carrier's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Wi-Fi steering uses RSSI values to determine station position for switching decisions, then the switching mechanism can operate with existing infrastructure, but the measurement precision is insufficient leading to switching errors
Solution Approach 1:
The patent replaces the traditional RSSI-based position estimation method with Wi-Fi sensing technology that uses signal reflection characteristics. Instead of relying on signal strength alone, the system analyzes reflection patterns to determine carrier position, achieving higher precision in position measurement and more reliable switching decisions.
2Reliability
If Wi-Fi sensing is implemented to improve position measurement precision, then switching decision reliability improves, but the device complexity increases
Solution Approach 1:
The patent makes the access point perform multiple functions: traditional Wi-Fi connectivity provision and Wi-Fi sensing for position determination. By integrating sensing capabilities into existing access points, the system achieves improved reliability without requiring completely separate positioning infrastructure, thus limiting the increase in device complexity.
Solution Approach 2:
The patent introduces a logic link as an intermediary element that connects the station to its carrier. This logic link serves as a data structure to store and manage the relationship between stations and carriers, simplifying the overall system architecture by providing a standardized mechanism for position-based switching decisions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the precision of switching decisions by using Wi-Fi sensing to geolocate the station relative to its carrier, reducing errors and enhancing the reliability of connection management in multi-access point environments.
Implementation Method 1
the first position and the second position of the carrier are determined by at least one access point of the plurality, on the basis of a signal reflected by the carrier, called Wi-Fi radar signal
Data Source
AI summary
A method for switching a connection of a mobile Wi-Fi station from a first access point of a plurality of Wi-Fi access points to a second access point of the plurality. The method includes: establishing a logic link between the station and a carrier of the station, on the basis of a comparison between a first position of the carrier and at least one value in relation to a signal transmitted by the station; performing a switching decision on the basis of a second position of the carrier.