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Indoor AP clustering selection method and equipment based on information gain rate

A technology of information gain rate and AP clustering, which is applied to services based on specific environments, wireless communication, character and pattern recognition, etc. It can solve the problem of insufficient resistance to multi-path effects of WIFI signals, affecting the speed and accuracy of positioning, and the calculation process. It can reduce the effective information space dimension, improve the positioning accuracy, and reduce the computing energy consumption.

Active Publication Date: 2022-04-01
HOHAI UNIV
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Problems solved by technology

At present, the existing AP selection methods mainly have shortcomings such as complex calculation process, large amount of calculation, and insufficient resistance to multipath effects of WIFI signals, which affect the speed and accuracy of positioning.

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  • Indoor AP clustering selection method and equipment based on information gain rate
  • Indoor AP clustering selection method and equipment based on information gain rate
  • Indoor AP clustering selection method and equipment based on information gain rate

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Embodiment Construction

[0063] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0064] The present invention proposes an indoor AP cluster selection method based on information gain rate, which mainly completes the AP selection work by collecting WIFI signal strength off-line at fingerprint points to construct a fingerprint database. Firstly, the APs are stratified according to the stratified interval by the received signal strength (Received Signal Strength, RSS) of the AP that can be collected at each fingerprint point, and then the information gain rate of each interval layer for the fingerprint point is calculated, according to the information gain rate Sort each layered interval from high to low, obtain the fingerprint information of each position to construct the fingerprint database, and then detect the APs through each fingerprint point in the order of the ordered layered intervals, according to th...

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Abstract

The invention discloses an indoor AP (Access Point) clustering selection method and equipment based on an information gain rate. The method comprises the following steps: acquiring signal intensity information at fingerprint points in a preset indoor positioning area, and constructing a fingerprint database; layering the APs according to the signal intensity information, calculating the information gain rate of each interval layer for the fingerprint points, and sorting each layered interval according to the information gain rate; for the APs in the sorted hierarchical intervals, clustering is carried out according to correlation coefficients of signal intensity matrixes of the APs; and according to a clustering result, selecting the APs with corresponding proportions from the corresponding categories as the indoor positioning AP access points. According to the method, the AP observed by each fingerprint point is layered and then clustered to distinguish the correlation of each AP, redundant APs and APs with poor observation quality can be effectively removed, the calculated amount of a system in an online position estimation stage is reduced, and the positioning speed and precision are improved.

Description

technical field [0001] The invention relates to indoor positioning technology for wireless communication, in particular to an indoor AP cluster selection method and equipment. Background technique [0002] The application of indoor location-based service (LBS) has received extensive attention in recent years. At present, the existing indoor positioning methods are mainly divided into three categories: indoor positioning methods based on specific equipment, indoor positioning methods based on wireless signals and Sensor-based indoor localization method. In indoor positioning based on wireless signals, because WIFI signals are ubiquitous in indoor environments such as personal homes and large shopping malls, indoor positioning methods based on WIFI signals are widely used. However, since the WIFI signal will experience signal attenuation during the propagation process, the positioning accuracy will be affected. In order to weaken the impact of signal attenuation on indoor po...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/20H04B17/318H04W4/33H04W64/00G06V10/762G06K9/62
CPCY02D30/70
Inventor 丁杨杨浩叶保留谢在鹏
Owner HOHAI UNIV
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