A kind of AP filtering method and device

Abstract

An embodiment of the invention discloses an AP filtering method and device. The method comprises the following steps: attribute information of each AP of an object position is obtained; the attribute information at least comprises frequency of occurrence and signal intensity value; statistics is run on effective value of a time sequence of each AP of the object position, all APs are subjected to preliminary filtering operation according to the effective value, probability of occurrence of each AP is calculated according to the frequency of occurrence of each AP, all preliminarily filtered APs are subjected to filtering operation according to the probability of occurrence of each AP and the signal intensity value, and a first preset number of APs are obtained; according to the signal intensity value of each of the first preset number of APs and a preset correlation formula, the first preset number of APs are subjected to filtering operation, and a second preset number of APs are obtained. Via application of the AP filtering method and device, redundant APs can be filtered out accurately, on-line positioning complexity can be lowered, and on-line positioning precision can be improved.

Description

technical field [0001] The invention relates to the technical field of wireless positioning, in particular to an AP filtering method and device. Background technique [0002] With the rapid development of wireless communication, wireless positioning technology has attracted more and more attention. At present, known wireless positioning methods mainly include location fingerprinting. The location fingerprinting method mainly includes two stages: the stage of establishing the fingerprint library offline and the stage of online positioning. In the phase of building the fingerprint database offline, for each location point, the identification information of the detectable access point (Access Point, AP) corresponding to the location point, and the received signal strength (Receive SignalStrength, RSS) of each AP can be collected value, and then establish a location fingerprint library, that is, the location fingerprint library includes the corresponding relationship between t...

AI Technical Summary

Problems solved by technology

However, the preset threshold for the RSS value or information entropy value of AP is artificially set, that is to say, the determination of the preset threshold for RSS value or information entropy value of AP has a lot of subjective factors, which leads to the final Filtered AP is not objective, not accurate

[0005] It can be seen that the AP filtering method in the prior art is not accurate enough for the existing application scenarios, there may still be redundant APs in the filtered APs, or APs that should not be filtered may be filtered out, resulting in online positioning complexity Higher, lower positioning accuracy

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