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Stepwise indoor three-dimensional positioning method for use in multi-floor environment

A three-dimensional positioning and multi-floor technology, applied in positioning, location information-based services, nan and other directions, can solve the problems of low positioning accuracy and large amount of calculation

Active Publication Date: 2016-08-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing technology and solve the problems of large amount of computation and low positioning accuracy encountered in the existing indoor three-dimensional positioning process, the present invention adopts the idea of ​​step-by-step and dimension reduction, and decomposes the three-dimensional positioning into floor positioning and plane positioning. Steps to complete, using the positioning method based on TDOA to achieve accurate positioning of the mobile terminal MT (Mobile Terminal, MT)

Method used

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  • Stepwise indoor three-dimensional positioning method for use in multi-floor environment
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  • Stepwise indoor three-dimensional positioning method for use in multi-floor environment

Examples

Experimental program
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Effect test

Embodiment 1

[0084] Example 1: MT3 to be located is located at 3F

[0085] Step 1: Arrangement of AP points in Figure 4 Medium, AP i Represents the distribution of APs. The AP connections on the fourth floor are perpendicular to the floor plane of the floor, and all APs are located near the ceiling; MT i The representative locates the floor location where the MT may be located. In the figure, 1F, 2F, 3F, and 4F represent the floor number of each floor, and the floor height h of each floor is 4m; the dotted line positions of each floor in the figure are h / 2, 3h / 2, 5h / 2, 7h / 2 Represents the middle position of each floor, that is, the positions where the height values ​​are 2m, 6m, 10m, and 14m respectively. In the case analysis and algorithm analysis measurement, the interlayer between the ceiling and the floor in the actual building is not considered.

[0086] Step 2: Floor Positioning

[0087] 2.1 The connection of APs (different floors) is perpendicular to the floor plane of the flo...

Embodiment 2

[0097] Example 2: The MT4 to be located is located at 4F, and the AP setting on the floor is the same as the Figure 4 same

[0098] Step 1: Arrangement of AP points in Figure 4 Medium, AP i Represents the distribution of APs. The AP connections on the fourth floor are perpendicular to the floor plane of the floor, and all APs are located near the ceiling; MT i The representative locates the floor location where the MT may be located. In the figure, 1F, 2F, 3F, and 4F represent the floor number of each floor, and the floor height h of each floor is 4m; the dotted line positions of each floor in the figure are h / 2, 3h / 2, 5h / 2, 7h / 2 Represents the middle position of each floor, that is, the positions where the height values ​​are 2m, 6m, 10m, and 14m respectively. In the case analysis and algorithm analysis measurement, the interlayer between the ceiling and the floor in the actual building is not considered.

[0099] Step 2: Floor Positioning

[0100] 2.1 The connection ...

Embodiment 3

[0108] Step 1: Arrangement of AP Points

[0109] exist Figure 5 , the AP connection on the fourth floor is not perpendicular to the floor plane of the floor; the meanings of the rest of the symbols in the figure are the same as Figure 4 same. In the third embodiment, the to-be-located MT3 is located at 3F.

[0110] Step 2: Floor Positioning

[0111] 2.1 The connection of AP (different floors) is not perpendicular to the floor plane of the floor (such as Figure 5 );

[0112] 2.2 Select two AP points AP3 and AP4 for judgment, d=3.76m, the distance L between the two APs is 5.7074m, and the floor height h is 4m. Then it is calculated that it does not satisfy the relation Therefore, it is necessary to re-select a group of APs on the two floors for re-judgment;

[0113] 2.3 Since AP3 and AP4 do not satisfy the relational expression Re-select the AP points that can be detected for judgment:

[0114] 2.3.1 Select two AP points AP5 and AP6 for judgment, d=4.31m, the dista...

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Abstract

The invention provides a stepwise indoor three-dimensional positioning method for use in a multi-floor environment, and relates to the field of indoor positioning. Three-dimensional positioning is finished through the two steps of floor positioning and plane positioning according to stepwise and dimension reduction thoughts, and accurate positioning of an MT (Mobile Terminal) is realized through a positioning method based on a TDOA (Time Difference of Arrival). The method comprises the following steps: firstly, judging a symbol of a measured value through a judgement mechanism to finish floor positioning of the MT and determine a floor on which the MT is positioned; and then, performing plane positioning on the MT to fulfill the aim of determining the position of the MT. Compared with the prior art, the method has the advantages that three-dimensional positioning of an unknown MT is realized; positioning APs (Access Points) are arranged easily and rapidly; a positioning principle is simple; the positioning accuracy is high; the positioning complexity is low; a database does not need to be pre-established for a multi-floor building to be positioned; a positioning process is simplified; and the portability is high. The method can be applied to various positioning applications of floor information and position information.

Description

technical field [0001] The invention relates to the field of indoor positioning, in particular to a step-by-step method for indoor positioning. Background technique [0002] With the development of wireless communication technologies and wireless networks, people's demands for positioning, especially indoor positioning, are increasing. Indoor scenes are more complex, with small space and many objects. Therefore, in indoor scenes, it is extremely challenging to obtain the location information of the target. [0003] At present, in the research of indoor positioning technology, the two-dimensional plane positioning technology is mostly, while the three-dimensional space indoor positioning technology research is relatively rare. In actual positioning requirements, the two-dimensional plane indoor positioning technology often cannot meet the positioning needs of users. . Therefore, the study of three-dimensional positioning technology is particularly important. [0004] In t...

Claims

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Application Information

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IPC IPC(8): H04W4/04H04W64/00G01S5/02
CPCG01S5/02H04W4/043H04W64/00
Inventor 贺宏锟时雅兵张阳王晓飞许炎
Owner NORTHWESTERN POLYTECHNICAL UNIV
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