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

A user terminal and access point technology, applied in the communication field, can solve the problems of repeated handover, failure to take into account, scanning failure, etc., and achieve the effect of reducing handover delay, improving gain, and guaranteeing scanning success rate.

Inactive Publication Date: 2012-10-24
XIDIAN UNIV
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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

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

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Embodiment Construction

[0046] refer to figure 1 , the implementation steps of the present invention are as follows:

[0047] Step 1: Current Access Point AP a with neighbor access point AP b Periodically exchange information so that the current access point AP a Get Neighbor Access Point AP b information, which includes the neighbor access point AP b The working channel number and load, where the load is the ratio of the current throughput to the channel bandwidth.

[0048] Step 2: Current Access Point AP a The neighbor access point AP that will be obtained b The information is sent to the current access point AP through the beacon frame a The connected user terminal STA, the way of the beacon frame is to use the beacon frame beacon in the 802.11 standard, and add the neighbor access point AP in the beacon frame beacon b information, and then the neighbor access point AP b The information is sent to the user terminal STA together with the beacon frame beacon.

[0049] Step 3: The user term...

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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...

Claims

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Application Information

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IPC IPC(8): H04W36/08H04W48/16
Inventor 史琰常树敏盛敏宿文强史明伟杨敏
Owner XIDIAN UNIV
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