Roaming Access Point Selection Using Band Preference
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Solution Overview
Problem
Conventional methods for mobile device roaming in wireless networks primarily rely on signal strength, overlooking other criteria that could provide a better network connection, such as operating band preference, leading to suboptimal performance.
Innovation Solution
A system and method that generates a list of available access points, determines initial ratings based on signal strength and latency, and adjusts these ratings according to a predetermined band preference list to select the most suitable access point for roaming, potentially choosing an access point with lower signal strength but better performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mobile unit selects an access point based only on signal strength, then the connection is established quickly and simply, but the network performance may be suboptimal
Solution Approach 1:
The patent applies parameter changes by transforming the roaming selection process from a single-parameter (signal strength) decision to a multi-parameter decision system. It introduces band preference as an additional parameter that modifies the rating calculation, allowing the mobile unit to consider both signal strength and operating band characteristics when selecting an access point, thereby improving network performance without excessive complexity
Solution Approach 2:
The patent segments the roaming selection process into distinct phases: initial scanning for available access points, rating calculation based on signal strength, and adjustment based on band preference. This segmentation allows the system to handle complexity in a structured manner, processing different criteria separately and combining them into a final selection decision
2Productivity
If the mobile unit prefers 5 GHz band access points for better performance, then network throughput improves, but the unit may miss access points with slightly higher signal strength on 2.4 GHz band
Solution Approach 1:
The patent uses parameter changes by introducing a band preference mechanism that assigns different weightings to access points based on their operating bands. The mobile unit can configure preferred bands (e.g., 5 GHz for throughput) and this preference is incorporated into the rating calculation, allowing the system to balance throughput requirements against connection reliability by adjusting the effective signal strength threshold based on band preference
Data Source
AI summary
A system and method determines a roaming access point (AP) using a band preference. The method includes generating a list including APs communicating in a communication network. A mobile unit is configured to connect to the communication network. The method includes determining an initial AP rating value for each of the APs as a function of a predetermined network parameter. The method includes generating a further AP rating value as a function of the initial AP rating value and a predetermined preference list of operating bands. The predetermined preference list is indicative of at least one operating bandwidth in which the MU prefers to connect. The method includes selecting one of the APs as a function of the further AP rating values. The method includes connecting the MU to the selected AP.