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Method and device for selecting access point in wireless LAN

An access point, wireless network technology, applied in the field of access point selection, can solve problems such as uplink throughput decline, achieve the effect of good backward compatibility and easy implementation

Active Publication Date: 2008-02-13
NTT DOCOMO INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

It can be seen from Figure 3 that when there are hidden terminals, the increase in the number of nodes will cause a significant decrease in uplink throughput

Method used

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  • Method and device for selecting access point in wireless LAN
  • Method and device for selecting access point in wireless LAN
  • Method and device for selecting access point in wireless LAN

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Embodiment Construction

[0029] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to prevent confusion in the understanding of the present invention.

[0030] According to the present invention, it is necessary for a wireless terminal to access a cell with the least influence caused by a hidden terminal. The method of the present invention includes two parts: initial association and re-association. The initial association means that when the wireless terminal initially accesses the WLAN, it selects an access point by adopting the above-mentioned passive or active scanning mode. The distribution of nodes in the network is constantly changing over time. Therefore, the wireless terminal needs to update its access point to complete further optimization. If the access point is based on the IEEE802.11 protocol, it is necessary to add an in...

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Abstract

The invention relates to a method of selecting an access point in a wireless network including the steps of that a wireless terminal carries out channel scan on a channel k in the wireless network, receives channel information sent out from the access point and takes out the channel utility ratio uk; confirms the maximum data transmission rate vk that can be supported by the current channel according to the received channel information; counts the channel acquisition probability rk in a scanning time space and calculates a hidden terminal influence factor fk according to the channel utility ratio uk, the maximum data transmission rate vk and the channel acquisition probability rk; carries out the processes on all the channels that can be accessed by the wireless terminal repeatedly, selects an access point AP corresponding to the minimum value of f that are calculated and adds in the basic operation group that the selected access point lies in.

Description

technical field [0001] The present invention relates to a method and a device for selecting an access point in a wireless local area network, in particular, to a method and a method for selecting an access point (AP, Access Point) in the process of association (Association) and reassociation (Reassociation) in a wireless local area network The device can estimate the influence brought by the hidden terminal when accessing the AP by making the wireless terminal measure the busyness of the channel on the available channel, thereby reducing the collision of uplink packets and improving the overall performance of the wireless local area network. Background technique [0002] With the continuous advancement of the standardization process, WLAN (Wireless Local Area Network) has been widely used in public hot spots such as enterprises and offices due to its low cost and high transmission rate to provide high-speed wireless access to the Internet. Serve. Especially in the large-sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04L12/28H04W36/00H04W48/16H04W48/20
Inventor 杜蕾白勇陈岚
Owner NTT DOCOMO INC
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