Channel selection method and device

Abstract

A channel selection method and device. The method comprises: step a : acquiring an access point (AP) address list on which channel configuration is to be performed in a cell, and setting all the APs in the AP address list to be in a silent state; step b: selecting one AP in the silent state from the AP address list, and turning off the silent state of the selected AP; step c: conducting channel scanning on the selected AP, and acquiring a combined field intensity value of each channel corresponding to the selected AP; step d: selecting an optional channel with the minimum combined field intensity value as a working channel of the selected AP; and step e: judging whether there is another AP in the silent state in the selected AP address list, and if so, returning to step b; otherwise, ending a channel selection flow. The technical solution can guarantee that all APs within a centralized networking region can respectively find an appropriate working channel.

Description

technical field [0001] The invention relates to the communication field, in particular to a channel selection method and device. Background technique [0002] WLAN (Wireless Local Area Networks, wireless local area network) technology has completed the leap from 11Mbps of 802.11b, to 54Mbps of 802.11a and 802.11g, and then to the highest physical layer rate of 450Mbps of 802.11N, accompanied by AMPDU (Aggregated MAC Protocol Auxiliary technologies such as Data Unit, aggregated MAC layer protocol data unit), AMSDU (Aggregated MAC Service Data Unit, aggregated MAC layer service data unit), and SGI (Short GuardInterval, short guard interval) make the WLAN wireless service rate faster and faster , Gradually become the expansion and supplement of the wired network. [0003] As users' demand for high-speed wireless Internet access becomes stronger, and notebook computers and mobile phones support high-speed WLAN, WLAN technology is more and more widely used. It is no longer limit...

AI Technical Summary

Problems solved by technology

The disadvantage of this parallel selection scheme is that when multiple APs run the algorithm at the same time, they will switch channels and scan at the same time. Before the channels of all APs are determined, the WLAN environment is also changing all the time.

It is very difficult to select a definite optimal channel in an unstable wireless environment, and the algorithm is difficult to converge, and sometimes even falls into a loop operation

That is to say, in the process of channel scanning calculation and final channel switching of AP, along with the parallel scanning operation of other surrounding APs, the change of WLAN environment will inevitably lead to unreasonable channel selection.

The parallel channel selection scheme will cause the channel that is judged to be the best at a certain point in time to become unsuitable for the AP at a later point in time.

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