Channel selection method and device

Abstract

The invention provides a channel selection method and device. The method includes the following steps that statistical information of all channels is obtained one by one, wherein the statistical information of each channel comprises a channel load of the channel and idle channel power of the channel; statistical information of a current basic service set (BSS) is obtained periodically, wherein the statistical information of the current BSS comprises a node maximum sending queue length and a node maximum sending delay; whether the statistical information of each channel and / or the statistical information of the current BSS meet / meets triggering conditions is judged; if the statistical information of each channel and / or the statistical information of the current BSS meet / meets the triggering conditions, the sum of throughput rates of each channel serves as a capacity parameter of each channel, and the channels are ranked according to the capacity parameters of the channels from high to low; the channel where the current BSS is located is switched to the channel ranked the highest. A channel selection mode based on channel capacity is achieved, the requirement for the bandwidth of APs in the channels can be better met by conducting channel selection from the aspect of the channel capacity, and a better communication effect is achieved.

Description

Technical field [0001] The present invention relates to communication technology, in particular to a channel selection method and device. Background technique [0002] In a wireless local area network (Wireless Local Area Networks, referred to as: WLAN), an access point (Access Point, referred to as: AP) and one or more STAs connected to the access point construct a wireless communication system through a wireless channel. Wireless link. The stations can exchange data through APs, and the stations and APs in the same wireless coverage area are called Basic Service Set (Basic Service Set, referred to as BSS). When two adjacent basic service group BSSs are adjacent to each other and work on the same channel, the possible contention between such overlapping BSSs is difficult to support the required service quality (Quality of Service, QoS). At the same time, especially in the home / office environment, unlicensed spectrum and external interference sources also have interference effe...

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Problems solved by technology

[0004] However, in the prior art, channel selection is only based on information such as interference, delay, and signal strength in the channel, which cannot meet the bandwidth requirements of BSS transmission, resulting in a decrease in communication quality when the selected channel is used for transmission.

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