Method for switching user terminal between access joints in WLAN (Wireless Local Area Network) based on AP (Access Point) collaboration

Abstract

The invention provides a method for switching a user terminal between access joints in a WLAN (Wireless Local Area Network) based on AP (Access Point) collaboration. The switching method is mainly used for solving the problems in the prior art that the switching delay is overlong, and the switching mode is single. The method is technically characterized in that two selecting modes including a driving switching mode and a driven switching mode are adopted, wherein the driving switching mode is used for carrying out the switching from a network side; under a condition that a current AP is overloaded, the driving switch can be started for the AP, and an STA (Single Threaded Apartment) of the user terminal is selected from an STA set of the currently-connected user terminal and then is switched into an adjacent AP; if the communication quality of the STA of the user terminal is degraded, the driven switching mode can be automatically started through the STA of the user terminal, and the STA is switched into an optimal AP; and under the driving switching mode and the driven switching mode, channels to be scanned are subjected to priority ranking, and the time for scanning each channel is dynamically adjusted. The switching method has the advantages of less switching delay and high success rate in scanning and can be applied to distribution type wireless local networks with basic network support.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for switching a user terminal between access points in a wireless local area network, which can be used for optimizing the communication quality of the network side and the user side of the wireless local area network. Background technique [0002] In recent years, wireless local area network technology has been developed rapidly and successfully applied, and its popularity has been continuously improved. Wireless local area network (WLAN) provides fast, efficient and low-cost wireless local area network access services for people. Accessing the Internet through a WLAN network can provide users with various services, such as VoIP, multimedia, and data transmission. For these applications and services, continuous and stable network access has become an inevitable requirement. In a WLAN, a user terminal STA accesses the network through an access point A...

AI Technical Summary

Problems solved by technology

For example, based on the Tuning algorithm that adjusts the minimum channel time and maximum channel time, this method sets these two values ​​​​too small, which has achieved an effect in reducing the handover delay, but it is easy to cause scanning failure, that is, there may be APs on the channel. However, because the minimum channel time and maximum channel time are set too small, the STA stays on the channel for too short a time and cannot accept the AP's response.

At the same time, the algorithm is only considered from the STA side, that is, the handover is only triggered from the STA, without considering the factors on the network side, which may easily cause the terminal to switch to a non-optimal AP and cause repeated handover problems.

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