A Toa-based Indoor Floor Locating Method

A positioning method and floor technology, applied in wireless communication, electrical components, etc., can solve the problems of being unsuitable for large-scale promotion and application, high cost, and long time consumption, and achieve the goals of reducing system burden, high positioning accuracy, and cost saving Effect

Active Publication Date: 2019-01-04
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve a certain positioning accuracy, its preparatory work takes a long time, requires many positioning nodes (Access Point, AP) and high cost, and the positioning accuracy is closely related to the completeness of the built fingerprint database data. It is also necessary to update the fingerprint database regularly, so it is not suitable for large-scale promotion and application

Method used

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  • A Toa-based Indoor Floor Locating Method
  • A Toa-based Indoor Floor Locating Method
  • A Toa-based Indoor Floor Locating Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] In the implementation example 1, the real height h of the MT to be positioned is 0 = 11.3m.

[0078] Step 1.AP is laid out according to step 1, and the coordinates of the four APs are AP 1 (0, 0, 3.5), AP 2 (0.1, 0.2, 8.5), AP 3 (0.2, 0.1, 13.5), AP 4 (0.1, 0.1, 18.5), only consider the situation where there is only one AP on each floor (the positioning method remains the same when there are multiple APs on each floor, no additional discussion will be made) and the AP power control is as described in step 2;

[0079] Step 2. After the MT is connected to the wireless network in the mall, it receives wireless signals from 3 APs, namely AP 2 , AP 3 and AP 4 , these 3 APs can form two sets of positioning APs: AP 2 with AP 3 and AP 3 with AP 4 , where the group of APs with the highest signal strength is the AP 2 with AP 3 ;

[0080] Step 3. Choose to use AP 2 with AP 3 Participate in positioning and calculate the time t it takes for the wireless signals sent b...

Embodiment 2

[0086] In the implementation example 2, the true height h of the MT to be positioned 0 = 11.5m.

[0087] Step 1.AP is laid out according to step 1, and the coordinates of the four APs are AP 1 (0, 0, 3.5), AP 2 (0.1, 0.4, 8.5), AP 3 (0.1, 0.2, 13.5), AP 4 (0.2, 0.2, 18.5), only consider the situation where there is only one AP on each floor (the positioning method remains the same when there are multiple APs on each floor, no additional discussion will be made) and the AP power control is as described in step 2;

[0088] Step 2. After the MT is connected to the wireless network in the mall, it receives wireless signals from 3 APs, namely AP 2 , AP 3 and AP 4 , these 3 APs can form two sets of positioning APs: AP 2 with AP 3 and AP 3 with AP 4 , where the group of APs with the highest signal strength is the AP 2 with AP 3 ;

[0089] Step 3. Choose to use AP 2 with AP 3Participate in positioning and calculate the time t it takes for the wireless signals sent by th...

Embodiment 3

[0095] In the implementation example 3, the real height h of the MT to be positioned 0 = 10.8m.

[0096] Step 1.AP is laid out according to step 1, and the coordinates of the four APs are AP 1 (0, 0, 3.5), AP 2 (0.2, 0.3, 8.5), AP 3 (0.1, 0.1, 13.5), AP 4 (0.1, 0.2, 18.5), only consider the situation where there is only one AP on each floor (the positioning method remains unchanged when there are multiple APs on each floor, no additional discussion will be made) and the AP power control is as described in step 2;

[0097] Step 2. After the MT is connected to the wireless network in the mall, it receives wireless signals from 3 APs, namely AP 2 , AP 3 and AP 4 , these 3 APs can form two sets of positioning APs: AP 2 with AP 3 and AP 3 with AP 4 , where the group of APs with the highest signal strength is the AP 3 with AP 4 ;

[0098] Step 3. Choose to use AP 3 with AP 4 Participate in positioning and calculate the time t it takes for the wireless signals sent by ...

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Abstract

The invention provides an indoor floor positioning method based on TOA (Time Of Arrival), and belongs to the field of positioning technology. The floor position of an MT (Mobile Terminal) to be solved can be pre-estimated according to the floor number of a positioning AP (Access Point) by controlling the transmitting power of the AP, and then the MT floor position solved by a specific algorithm is corrected to realize floor positioning of the MT to be solved, wherein a few positioning APs are adopted, so that the burden of the system is reduced, and the positioning cost is lowered; the positioning APs are arranged simply and quickly and are simple in positioning principle and high in positioning accuracy, so that the difference of transceiver gains does not need to be considered, the physical requirement for a transceiver antenna is reduced, the positioning complexity is low, a database does not need to be pre-established for a multi-floor building to be positioned, the positioning process is simplified, the portability is high, and the method can be combined with various different plane positioning methods to realize three-dimensional spatial positioning of a target to be positioned.

Description

technical field [0001] The invention belongs to the technical field of positioning, in particular to a positioning method for indoor floors. Background technique [0002] In modern life, people's daily work, leisure, entertainment, etc. are more and more concentrated in high-rise buildings. Therefore, floors and the information they contain are gradually attracting people's attention. When the user is in an indoor environment with complex building structure and dense people, such as a commercial center or a station, it is often impossible to quickly determine the location of the floor he is on. At this time, he hopes to obtain relevant floor information through the positioning application. In recent years, indoor plane positioning technology has become more and more mature, and various plane positioning systems have emerged in an endless stream. However, in actual positioning requirements, two-dimensional indoor positioning technology often cannot meet the positioning needs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00
CPCH04W64/00H04W64/006
Inventor 贺宏锟王晓飞许炎雷阳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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