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Method and system for realizing wireless terminal roaming switch in wireless local area network

A wireless local area network, wireless terminal technology, applied in the field of communication, can solve the problems of long time, failure, long time required for handover, etc., and achieve the effect of shortening handover delay

Active Publication Date: 2014-03-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is: during the handover process, the original connection needs to be disconnected first, and then re-associated and re-authenticated at the new access point AP, so it takes a long time
In application, this method requires the terminal STA to send a corresponding probe request, but in the actual implementation process, if the roaming switching strategy adopted by the terminal STA is passive scanning, the terminal STA may not actively send a probe request, or the terminal STA may not actively send a probe request, or the terminal STA may not actively send a probe request when there is data When sending, it sends very few probe requests, so the effect of using this method is not obvious in this situation. At the same time, when using this method to achieve roaming handover, it needs to re-authenticate and associate; in addition, if the roaming handover used by the terminal STA When the strategy is "select the strongest signal when the connection is just started, and then associate with the access point AP all the time, and switch the access point only when the signal of the associated access point AP is completely lost", this method is due to not applicable
[0007] In addition, in the prior art, the terminal STA needs to go through the process of re-scanning during the roaming process. Research shows that the frequency scanning process of the terminal STA to scan the channel frequency to determine the access point AP is also time-consuming, so the handover required The time is also relatively long, resulting in poor user experience

Method used

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  • Method and system for realizing wireless terminal roaming switch in wireless local area network
  • Method and system for realizing wireless terminal roaming switch in wireless local area network
  • Method and system for realizing wireless terminal roaming switch in wireless local area network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] image 3 The terminal STA provided in Embodiment 1 of the present invention adopts the temporary key integrity protocol TKIP encryption method to encrypt the signal flow diagram of the network side controlling the switching of the wireless terminal in the wireless local area network, and the specific steps are as follows:

[0060] Step 101: When the handover functional entity located on the source access point AP or the access controller AC needs to handover the terminal STA from the source access point AP to the target access point AP, perform step 102.

[0061] After the terminal STA associates with the source access point AP, the handover functional entity on the network side judges whether to perform handover to the terminal STA according to the signal quality or load, and determines the corresponding target access point AP.

[0062] The handover functional entity may be built in the access controller AC, may also be built in the access point AP, or be a single ext...

Embodiment 2

[0089] Figure 4 The embodiment 2 of the present invention provides a schematic diagram of the signal flow of the network side controlling the switching of the wireless terminal in the wireless local area network encrypted by the terminal STA using the counter mode and the cipher block chain message authentication code protocol CCMP encryption mode. The specific steps are as follows:

[0090] Step 201: When the handover functional entity located on the source AP or the access controller AC needs to handover the terminal STA from the source AP to the target AP, step 202 is executed.

[0091] After the terminal STA associates with the source access point AP, the handover functional entity on the network side judges whether to perform handover to the terminal STA according to the signal quality or load, and determines the corresponding target access point AP.

[0092] The handover functional entity mainly includes a handover detection module, a target access point AP selection mo...

Embodiment 3

[0109] Figure 5 Embodiment 3 of the present invention provides a schematic diagram of the signal flow of the network side controlling wireless terminal switching in the wireless local area network encrypted by the terminal STA using the wired equivalent encryption WEP encryption method, and the specific steps are as follows:

[0110] Step 301: Step 302 is executed when the handover functional entity located on the source AP or the access controller AC needs to handover the terminal STA from the source AP to the target AP.

[0111] After the terminal STA associates with the source access point AP, the handover functional entity on the network side judges whether to perform handover to the terminal STA according to the signal quality or load, and determines the corresponding target access point AP.

[0112] The handover functional entity mainly includes a handover detection module, a target access point AP selection module, and a handover message interaction module. Similarly, ...

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PUM

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Abstract

The invention discloses a method and system for realizing wireless terminal roaming switch in a wireless local area network. The method provides a scheme for actively switching terminals STA on a network side, does not rely on the switch strategy of the terminals STA self, can actively control the roaming switch moment and the switched-to corresponding target access point (AP) by the network side, meanwhile does not need to scan, authenticate and associate the terminals STA again, and achieves the purposes of actively controlling the roaming switch of the terminals STA and shortening switch time delay by the network side.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular, to a method and system for realizing roaming switching of a wireless terminal in a wireless local area network. Background technique [0002] With the continuous development of wireless local area network (WLAN, Wireless Local Area Network) technology, at present, centralized management of WLAN has been applied more and more. Among them, the centrally managed WLAN is mainly composed of an access point (AP for short) and an access controller (AC for short). management to jointly provide WLAN access services. [0003] Usually, when the mobile terminal roams, it roams from the coverage area of ​​one access point AP to the coverage area of ​​another access point AP. During the roaming process, the signal quality of the currently accessed source access point AP will gradually decrease, while the signal quality of the target access point AP will gradually increase. Such...

Claims

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Application Information

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IPC IPC(8): H04W36/08H04W36/38
Inventor 胡星星
Owner ZTE CORP
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