Indoor Wi-Fi positioning method

A technology for locating areas and to-be-located points, applied in services based on location information, services based on specific environments, electrical components, etc. The effect of reducing the influence and reducing the positioning error

A technology for locating areas and to-be-located points, applied in services based on location information, services based on specific environments, electrical components, etc. The effect of reducing the influence and reducing the positioning error

CN109640260AInactive Publication Date: 2019-04-16MINNAN NORMAL UNIV
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Examples, see figure 1 and figure 2 As shown, a method for indoor Wi-Fi positioning of the present invention includes several positioning APs, positioning clients and positioning servers, and also includes the following steps

[0037] A: Positioning system initialization: Divide the area to be positioned into 9 positioning areas, each positioning area is numbered A1 to A9, the collection points L1 to L9 are respectively set at the center points of the positioning areas A1 to A9, and the collection points L1 to L7 Install the positioning AP, use the MAC address to number the positioning APs on the collection points L1 to L7 as AP1 to AP7, the distance between each collection point is 1.2 meters, and the area of ​​each positioning area is approximately equal, and the point X to be located is in the positioning area A5, Coordinates are (1.2, 1.2), coordinate distribution see figure 2 .

[0038] B: Signal data collection: collect a signal every other collection cycle t...

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Abstract

The invention discloses an indoor Wi-Fi positioning method, comprising a plurality of positioning APs, a positioning client and a positioning server. The method further comprises the following steps:A: positioning system initialization: dividing a positioning area, and setting a collection point to install the positioning APs; B: signal data acquisition: constructing a signal strength matrix anda signal distribution matrix; C: skew distribution filtering: filtering out abnormal points according to a filtering threshold section T<D>= formula; and D: positioning: selecting coordinate weightingof a plurality of positioning area collection points to obtain the coordinates of a to-be-positioned point. The method in the invention has the advantages of effectively filtering out the signal abnormal points and improving the positioning accuracy.

Description

technical field [0001] The invention relates to a method for indoor Wi-Fi positioning. Background technique [0002] With the increasing maturity of wireless network technology, wireless network has been accepted by more and more enterprise users. At present, wireless local area network has become a hot spot in wireless network technology. Compared with wired network, wireless local area network has the advantages of flexible use and convenient expansion. , cost economy, simple installation and so on. [0003] In step C of "A Method for WiFi Positioning" with application number 201711220071.2, the method used to filter out signal abnormalities in the fingerprint database is: for the signal strength collected in a sampling period T, find the signal of each positioning AP The strength mean value μ and standard deviation σ, the selection principle is based on the larger mean value μ, and the first p APs with good signals are selected. If the mean value μ is equal, the standard...

Claims

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Application Information

Patent Timeline
16 Apr 2019
Publication
CN109640260A
IPC
H04W4/021; H04W4/33; H04W64/00
CPC
H04W4/021; H04W4/33; H04W64/003
Inventors
杨敬民; 林敏敏