Switching Threshold Negotiation for Wi-Fi Roaming Continuity
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Solution Overview
Problem
In Wi-Fi networks, especially in enterprise offices or large conference rooms, the mismatched switching thresholds between terminals and wireless access devices lead to premature disconnection of terminals before they can roam to a stronger signal, affecting network access quality.
Innovation Solution
A method to set matching switching thresholds for terminals and wireless access devices by determining and negotiating their respective thresholds based on transmit power, ensuring that terminals initiate roaming before being disconnected by the access device, thereby maintaining wireless communication continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switching threshold of the terminal is set higher than the switching threshold of the wireless access device, then the terminal can initiate roaming before being disconnected, but the wireless access device cannot actively release the association when signal strength is relatively weak, causing the terminal to remain associated with a weak signal access device
Solution Approach 1:
The patent makes the switching threshold dynamic by allowing it to be adjusted based on device type and signal conditions. The terminal and wireless access device can negotiate and set different thresholds appropriate to their roles and current network state, rather than using a fixed threshold for all devices.
Solution Approach 2:
The patent changes the parameter of switching threshold based on device characteristics (terminal vs. wireless access device) and signal conditions. By adjusting the threshold parameter dynamically according to the specific scenario, the system resolves the contradiction between maintaining connection reliability and enabling timely roaming.
2Reliability
If the switching threshold of the wireless access device is set excessively low, then the terminal is not disconnected prematurely, but the terminal cannot start roaming and the wireless access device cannot release the association, affecting user experience
Solution Approach 1:
The patent applies different switching threshold settings to different devices and scenarios. The terminal and wireless access device can have locally optimized thresholds based on their specific functions, transmit powers, and network roles, rather than using a universal threshold that compromises overall system performance.
Solution Approach 2:
The patent enables preliminary negotiation of switching thresholds between the terminal and wireless access device before roaming is needed. This preliminary action allows both devices to agree on appropriate threshold values that prevent both premature disconnection and failed roaming initiation.
3Ease of manufacture
If preset switching thresholds are used without coordination, then the configuration is simple, but the mismatched thresholds cause the terminal to be disconnected before roaming can occur
Solution Approach 1:
The patent introduces feedback mechanisms where the terminal and wireless access device exchange information about their transmit powers and detect signal strengths. Based on this feedback, both devices can calculate and negotiate appropriate switching thresholds that ensure reliable roaming continuity.
Solution Approach 2:
The patent uses signal strength detection and transmit power information as intermediary parameters to coordinate the switching thresholds. By using these intermediary measurements, the terminal and wireless access device can indirectly negotiate and align their thresholds without complex direct configuration.
Data Source
AI summary
Embodiments provide a switching threshold setting method and apparatus, and a device, applied to a wireless local area network. A switching threshold of a terminal and a switching threshold of a wireless access device that match each other are set, so that when the wireless access device is to release an association with the terminal, the terminal has started roaming to find a target wireless access device.