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Improved position fingerprint positioning method based on crystal type beacon layout

A fingerprint positioning and beacon technology, which is applied to services based on location information, services based on specific environments, positioning, etc. The effect of smoothing the output

Active Publication Date: 2021-08-10
UNIV OF ELECTRONIC SCI & TECH OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the positioning accuracy of the traditional location fingerprint positioning solution mainly depends on the accuracy of the fingerprint library information. Since the iBeacon device itself has attenuation, the transmission power will be reduced when the battery is insufficient, resulting in changes in the fingerprint information.
In addition, if the indoor environment changes, due to the multipath effect and shadow attenuation, the signal strength value of the sampling point will also change. With the increase of the positioning area, the number of fingerprint databases will increase linearly. Any errors occur, because these errors will directly reduce the accuracy of positioning
At this time, manpower and material resources are needed to update the fingerprint library, so the traditional solution requires a lot of cost. Due to the complexity of the indoor RF environment, the placement of iBeacon devices will also affect the positioning accuracy. Currently, the placement of iBeacon devices b is improved. Improving accuracy is an area that has not received much research attention

Method used

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  • Improved position fingerprint positioning method based on crystal type beacon layout
  • Improved position fingerprint positioning method based on crystal type beacon layout
  • Improved position fingerprint positioning method based on crystal type beacon layout

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Embodiment

[0066] The invention proposes an improved low-cost position fingerprint positioning scheme based on the CIP layout. The present invention uses a specific placement strategy to arrange iBeacon devices, and the positional relationship between each iBeacon device and the nearest adjacent iBeacon device is highly regular. In the off-line sampling stage, the present invention selects a representative area, and then only builds a fingerprint library in this area. In the online positioning stage, select the adjacent iBeacon device with the largest RSSI value as a reference point, calculate the relative position through the WKNN algorithm, and then calculate the absolute position by accumulating the absolute position coordinates of the iBeacon device with the largest RSSI value. The invention directly reduces the sampling cost of the traditional algorithm from linear to constant level through the low-cost location fingerprint matching algorithm. Such as figure 1 As shown, the presen...

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Abstract

The invention provides an improved position fingerprint positioning method based on crystal type beacon layout, which belongs to the technical field of fingerprint positioning, and comprises the following steps: arranging sampling points in a positioning area, and storing the sampling points in a database D; collecting fingerprint information at sampling points, and constructing a fingerprint database RSSI; selecting an iBeacon device adjacent to the iBeacon device with the maximum RSSI value from the fingerprint database RSSI as a reference point, and calculating by using a WKNN algorithm to obtain the relative position of the adjacent iBeacon device; performing accumulation calculation on the absolute position coordinates of the iBeacon equipment with the maximum relative position and RSSI value to obtain an absolute position, and obtaining positioning coordinates; and correcting the positioning coordinates by using a Kalman filter to complete the improved position fingerprint positioning based on the crystal type beacon layout. Compared with a traditional position fingerprint positioning layout structure, the positioning precision is improved.

Description

technical field [0001] The invention belongs to the technical field of fingerprint positioning, and in particular relates to an improved location fingerprint positioning method based on crystal beacon layout. Background technique [0002] At present, the positioning accuracy of the traditional location fingerprint positioning solution mainly depends on the accuracy of the fingerprint library information. Since the iBeacon device itself has attenuation, the transmission power will be reduced when the battery is insufficient, resulting in changes in the fingerprint information. In addition, if the indoor environment changes, due to the multipath effect and shadow attenuation, the signal strength value of the sampling point will also change. With the increase of the positioning area, the number of fingerprint databases will increase linearly. Any errors occur, because these errors will directly reduce the accuracy of positioning. At this time, manpower and material resources a...

Claims

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Application Information

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IPC IPC(8): H04W4/029H04W4/33H04W64/00H04B17/318G01S5/12
CPCH04W4/029H04W4/33H04W64/00H04B17/318G01S5/12
Inventor 武畅杨帆张莹王跃游远吴鹏金雪敏袁环宇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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