WLAN Terminal Roaming via Session Parameter Migration
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Solution Overview
Problem
The challenge in wireless local area networks (WLANs) is the smooth transition of terminals during roaming, as existing methods require time-consuming session negotiations, leading to service transmission delays.
Innovation Solution
A method where session parameters used by a terminal with an original associated access point (AP) are migrated to a roaming target AP, allowing direct data exchange without the need for additional negotiations, thereby reducing service recovery time and transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If session negotiation is performed during roaming handover, then security and connection reliability are improved, but service transmission delay increases
Solution Approach 1:
The terminal performs session negotiation with the target AP before disconnecting from the source AP, establishing the session in advance. This preliminary action allows the terminal to immediately resume data transmission after handover without performing negotiation again, thereby reducing service transmission delay while maintaining connection reliability
Solution Approach 2:
The patent skips the session negotiation step during the actual handover process by having it completed in advance. The terminal rushes through the handover by already having the session established, eliminating the time-consuming negotiation phase that would normally occur during handover
2Stability of the object's composition
If session negotiation is performed during roaming handover, then connection stability is improved, but roaming smoothness deteriorates
Solution Approach 1:
Session negotiation is performed as a preliminary action before the terminal actually roams to the target AP. This ensures connection stability is established in advance, while the actual roaming process becomes smooth and uninterrupted since the session is already configured
3Reliability
If session negotiation is performed during roaming handover, then authentication reliability is improved, but data service recovery time increases
Solution Approach 1:
Authentication and session negotiation are performed as preliminary actions before the terminal disconnects from the source AP. The terminal authenticates with the target AP in advance, establishing reliable authentication while minimizing data service recovery time since the session is already ready upon handover
Data Source
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AI summary
A terminal roaming method, an apparatus, and a wireless local area network are disclosed, and belong to the field of WLAN technologies. A session parameter used when a terminal performs data exchange with an original associated AP is migrated to a roaming target AP. After the terminal is associated with the roaming target AP, the roaming target AP can continue data exchange with the terminal based on the migrated session parameter, and the terminal can also continue data exchange with the roaming target AP based on the session parameter used when the terminal performs data exchange with the original associated AP. The terminal and the roaming target AP do not need to perform session negotiation again, to shorten a data service recovery time required after a roaming handover of the terminal, and reduce a service transmission delay. This improves smoothness of roaming handover of the terminal.