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Self-adaptive dynamic construction method of WIFI indoor positioning system fingerprint database

An indoor positioning and fingerprint data technology, applied in positioning, radio wave measurement systems, measurement devices, etc., can solve the problems of high labor cost and unfavorable positioning technology promotion, so as to reduce labor costs and achieve comprehensive fingerprint data information. Accurate and stable data

Inactive Publication Date: 2016-01-27
SOUTH CHINA UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

At the same time, the establishment of the location fingerprint database generally requires special personnel to operate, which consumes a lot of labor costs, which is not conducive to the further promotion of this positioning technology.

Method used

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  • Self-adaptive dynamic construction method of WIFI indoor positioning system fingerprint database
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  • Self-adaptive dynamic construction method of WIFI indoor positioning system fingerprint database

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Embodiment Construction

[0043] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and process, but the protection of the present invention is not limited to the following examples.

[0044] like figure 2 As shown, a kind of WiFi indoor positioning system fingerprint database adaptive dynamic construction method provided by the present invention, its specific implementation steps are as follows:

[0045] (1) Choose a reasonable AP layout method

[0046]According to the indoor positioning scenario in the embodiment, APs are laid out in a triangular zigzag layout, as shown in the attached figure 1 shown. The layout method can reduce the number of APs on the basis of ensuring comprehensive fingerprint i...

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Abstract

The invention discloses a self-adaptive dynamic construction method of a WIFI indoor positioning system fingerprint database. The method comprises the following steps of: 1) determining an AP layout mode, and properly reducing the number of APs; 2) determining the size of a grid and positions of sample reference points; 3) according to a 'useless AP rejecting' rule, rejecting related data of useless APs; 4) adopting a 3[delta] rule to carry out gross error processing on the data, and lowering the integral fluctuation degree of the data; and 5) according to a time moving window method, regularly updating the fingerprint database, and automatically adapting to interference caused by environment changes. According to the invention, the reasonable AP layout and the suitable grid size are selected, the construction of the fingerprint database is accelerated, and the fingerprint information is more comprehensive and accurate; in addition, the useless APs are rejected, and the fingerprint database is regularly updated, so that the complexity of a positioning algorithm is lowered, and the responsiveness and the environment interference resistance are improved for the positioning of a positioning system.

Description

technical field [0001] The invention relates to a WiFi-based indoor positioning system, in particular to a method for constructing a fingerprint database in a WiFi-based indoor positioning. Background technique [0002] With the rapid development of communication technology and wireless network, people's demand for location positioning is increasing, especially in large and complex indoor environments, such as libraries, large department stores, underground parking lots, etc., it is often necessary to determine Indoor location information and related services. [0003] In the outdoor environment, the positioning technology based on location services has mature and relatively accurate GPS technology. However, because satellite signals are easily blocked by various obstacles, satellite positioning technologies such as GPS are not suitable for indoor scenes. Current indoor positioning technologies mainly include: radio frequency identification technology (RFID), Bluetooth tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/20H04W64/00
CPCH04W16/20G01S5/0252H04W64/006
Inventor 张梅姚志锋朱金辉申文波
Owner SOUTH CHINA UNIV OF TECH
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