Wireless AP positioning method for urban underground comprehensive pipe gallery

Abstract

The invention provides a wireless AP positioning method for an urban underground comprehensive pipe gallery. The positioning method comprises an offline acquisition stage and an online positioning stage. The offline acquisition stage comprises the following steps: selecting one of a plurality of wireless APs as a reference wireless AP, symmetrically dividing the coverage area of the reference wireless AP into an area A and an area B, acquiring position fingerprint information of a plurality of acquisition points in the area A, and acquiring the position fingerprint information of each acquisition point in the area B according to the symmetry so as to acquire the position fingerprint information in the coverage area of the reference wireless AP; the position fingerprint information of the coverage range of the other wireless APs is obtained according to the actual distance between each wireless AP and the reference wireless AP, thereby obtaining an offline position fingerprint library; in the online positioning stage, a K-nearest neighbor algorithm is adopted to obtain positioning coordinates. In the offline acquisition stage, the coverage area of the reference wireless AP is divided into an area A and an area B, and only the position fingerprint information of the area A needs to be acquired, so that the acquisition workload is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a wireless AP positioning method for urban underground utility corridors. Background technique [0002] The location fingerprint-based WLAN indoor positioning technology uses the location fingerprint database established in the offline stage, that is, the location fingerprint map (Radio-map) to describe the mapping relationship from the RSS signal space to the physical space. In the online stage, the position fingerprint positioning algorithm is used to calculate the positioning results. This technology can achieve high positioning accuracy under non-line-of-sight (NLOS) conditions, and can meet the needs of most LBS (location-based services) in indoor environments without requiring additional hardware equipment . [0003] Therefore, WLAN indoor positioning technology based on location fingerprint has become the main research direction in the field of location awaren...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a wireless AP positioning method for urban underground utility corridors, aiming to solve the problems of large collection workload and poor positioning effect in the off-line acquisition stage of the general location fingerprint method in the utility corridor environment. The specific technical scheme is as follows :

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