Multi-Link Wi-Fi Roaming Control for Throughput Stability
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Solution Overview
Problem
In multi-link communication systems conforming to IEEE 802.11be standard, the efficiency of roaming is compromised due to decreased throughput and increased calculation requirements for link comparison during roaming.
Innovation Solution
A communication apparatus is designed to establish multiple links, acquire information about peripheral communication devices upon link disconnection, and control roaming to another device based on this information, optimizing the roaming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If roaming is performed based on RSSI threshold comparison in multi-link communication, then the STA can switch between access points, but the throughput decreases and calculation overhead increases
Solution Approach 1:
The patent extracts the roaming decision logic from continuous RSSI monitoring and threshold comparison. Instead of constantly calculating and comparing RSSI values, the system uses event-triggered roaming initiation based on link disconnection or quality degradation, thereby reducing calculation overhead while maintaining roaming functionality
Solution Approach 2:
The patent implements preliminary actions by maintaining multiple links concurrently before actual disconnection occurs. The system prepares backup links in advance and uses link quality prediction mechanisms to proactively switch connections, avoiding the need for continuous real-time RSSI calculations during active communication
2Productivity
If multiple links are established concurrently in multi-link communication, then communication capacity increases, but the complexity of managing link comparisons for roaming increases
Solution Approach 1:
The patent segments the link management function by separating the multiple established links into distinct entities with individual quality metrics. Each link is managed independently with its own quality assessment, allowing the system to handle multiple links without proportionally increasing overall management complexity through structured organization
Solution Approach 2:
The patent introduces link quality as an intermediary metric that mediates between raw RSSI measurements and roaming decisions. This intermediary layer processes and compares multiple link qualities, simplifying the complex task of selecting the best link for roaming by using a standardized quality assessment framework rather than direct RSSI comparison
Data Source
AI summary
A communication apparatus conforming to Institute of Electrical and Electronics Engineers (IEEE) 802.11 series standards establishes multiple links at least including a first link and a second link with a first other communication apparatus, performs a process to acquire information about other peripheral communication apparatuses based on disconnection of any one link, among the multiple links established with the first other communication apparatus, and performs control so as to perform roaming to a second other communication apparatus based on the acquired information.