Multi-Link Wi-Fi Roaming Based on Link State Evaluation
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Solution Overview
Problem
Existing wireless communication systems face issues with seamless roaming operations when multiple Wi-Fi links are involved, leading to unnecessary or unexpected operations due to limited AP coverage and interference.
Innovation Solution
An electronic device equipped with a wireless communication module and processor that can differentiate and perform roaming operations based on the state of multiple links, including monitoring parameters like RSSI and SNR, to efficiently switch between APs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If roaming operations are performed without considering the state of multiple links, then the electronic device can maintain basic connectivity, but unnecessary or unexpected operations occur leading to reduced reliability
Solution Approach 1:
The patent applies parameter changes by evaluating the state of multiple links using specific parameters (RSSI, SNR, link quality) to determine whether roaming should be triggered. Instead of using a single link for roaming decisions, the system changes the parameter set to include multiple link states, thereby improving roaming reliability by avoiding unnecessary operations while accounting for the complexity of multi-link environments.
2Reliability
If the electronic device performs scanning to find other APs frequently, then connectivity reliability improves, but loss of time and energy increases due to unnecessary scans
Solution Approach 1:
The patent implements feedback by continuously monitoring the state of multiple links (RSSI, SNR, link quality) and using this feedback to determine whether roaming operations are actually needed. The system provides feedback to the roaming decision logic, allowing it to suppress unnecessary scanning when link conditions are adequate, thereby reducing time and energy loss while maintaining connectivity reliability.
Solution Approach 2:
The patent applies partial action by performing roaming evaluations selectively rather than continuously. Instead of scanning for other APs at all times, the system performs partial evaluations based on the state of current links, triggering full roaming operations only when necessary. This reduces the overall time and energy consumed by roaming scans while maintaining reliable connectivity.
3Ease of operation
If roaming operations are triggered based on single link conditions, then the operation is simple, but unexpected operations occur reducing system stability
Solution Approach 1:
The patent applies universality by creating a unified roaming decision mechanism that handles multiple link states through a single evaluation framework. The system uses a universal set of criteria (RSSI threshold, SNR threshold, link quality) that can evaluate any combination of link states, making the operation simple yet stable. This multi-functional approach allows the same roaming logic to handle various scenarios (single link, multiple links, different quality levels) without requiring separate complex decision paths.
Data Source
AI summary
An electronic device includes a wireless communication module configured to transceive a wireless signal, a processor operatively connected to the wireless communication module, and a memory electrically connected to the processor and configured to store instructions executable by the processor, wherein, when the instructions are executed by the processor, the processor is configured to determine whether roaming is triggered by a roaming trigger while forming a plurality of links with and connected to an access point (AP), determine a state of the plurality of links by responding to the roaming trigger, and differentiate and perform roaming operations according to the state of the plurality of links. In addition, various embodiments may be possible.