Wireless local area network access method, access point and terminal

Abstract

The invention provides a wireless local area network access method, an access point and a terminal. The method is characterized in that a notification message sent by AP on a channel of a first frequency band carries channel information of the first frequency band and also carries channel information of a second frequency range which expects the terminal to preferentially access so that the terminal can rapidly acquire and maintain channel information of the plurality of frequency bands; and then when the AP is subsequently accessed, according to a predetermined strategy, in the channel information of the plurality of maintained frequency bands, the frequency band of priority access is directly selected to carry out access. High-efficient and rapid frequency spectrum navigation is realized, several times of repeated overtime processes or disassociation operation in the prior art are avoided, frequency spectrum navigation time and channel occupation are reduced and a user experience is improved.

Description

technical field [0001] The invention relates to the technical field of wireless local area network (WLAN), in particular to a method for accessing a wireless local area network, an access point (AP) and a terminal. Background technique [0002] IEEE802.11n supports two frequency bands of 2.4GHz and 5.8GHz at the same time. The 2.4GHz frequency range is 2.4-2.483GHz, and there are at most three channels that do not interfere with each other at the same time, and each channel is 20MHz. The 5.8G frequency band has high frequency and rich spectrum resources (5.15GHz-5.85GHz), has 8 non-overlapping channels, and has strong anti-interference ability. Especially when deploying high-speed 802.11n networks in batches, the 802.11n protocol stipulates that 40MHz bandwidth must be used, so only one channel is available in the entire 2.4GHz frequency band. When deploying 802.11n 40MHz networks on a large scale, co-channel interference is serious, while 5.8GHz spectrum resources are abun...

AI Technical Summary

Problems solved by technology

[0007] The existing spectrum navigation methods guide the terminal to access the 5.8GHz frequency band by not responding to the terminal’s association request of the 2.4GHz frequency band for a long time, or repeatedly disassociate the user’s 2.4GHz frequency band association, but the existing terminals are based on The size of the signal strength is used to select the access AP, so these methods cannot guarantee that the dual-band client will be able to successfully guide the dual-band client to access the 5.8GHz frequency band, and these methods require repeated timeout processes or disassociation operations, and the spectrum navigation takes a long time , and the channel is occupied for a long time, suppressing user bandwidth, resulting in poor user experience

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