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Indoor location method, device and system

An indoor positioning and location information technology, applied in the field of communication, can solve the problem of low positioning accuracy of intelligent terminals, and achieve the effect of improving accuracy and positioning accuracy

Active Publication Date: 2017-12-29
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide an indoor positioning method, device, and system to solve the problem of using RSSI-based indoor positioning methods using location fingerprints and clustering ideas in the prior art. The problem of low positioning accuracy of the smart terminal corresponding to the fingerprint to be tested on the edge

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  • Indoor location method, device and system

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Embodiment 1

[0047] figure 1 It is a flowchart of an indoor positioning method provided by Embodiment 1 of the present invention. The embodiments of the present invention are directed to the RSSI-based indoor positioning method using position fingerprints and clustering ideas in the prior art, and the positioning accuracy of the smart terminal corresponding to the fingerprint to be measured that is far from the center of the attribution class and at the edge of the attribution class Low problem, an indoor positioning method is provided, and the execution subject of the method is the positioning server. Such as figure 1 As shown, the specific steps of the method are as follows:

[0048] Step S101: When receiving the positioning request sent by the target to be located, obtain the fingerprint to be measured of the target to be located.

[0049] Among them, the fingerprint to be measured is the fingerprint information of the current location of the target to be located, that is, the fingerprint t...

Embodiment 2

[0087] figure 2 It is a schematic diagram of the positioning area provided in the second embodiment of the present invention. On the basis of the first embodiment, in this embodiment, when locating the target to be located corresponding to the fingerprint to be tested, a location fingerprint library needs to be established in advance.

[0088] In this embodiment, a preset number of signal source devices are preset in the positioning area, the positioning area is pre-divided into a number of sub-areas, and the center of the sub-area is used as a reference point to obtain the position information and fingerprint information of each reference point. The fingerprint information of the reference point refers to a signal sequence composed of the signal strength of the WIFI signal sent by each signal source device received at the reference point. The position information of the reference point may be the position coordinates of the reference point.

[0089] Optionally, an existing WIFI ...

Embodiment 3

[0108] image 3 Is a flowchart of an indoor positioning method provided in Embodiment 3 of the present invention; Figure 4 Is a schematic diagram of an edge determination condition provided in the third embodiment of the present invention; Figure 5 This is the cumulative error distribution (CDF) simulation result under different K values ​​provided in the third embodiment of the present invention. On the basis of the above-mentioned Embodiment 1 or Embodiment 2, in the embodiment of the present invention, as image 3 As shown, judging whether the fingerprint to be tested is at the edge of the attribution category can be implemented in the following steps:

[0109] Step S201: Calculate the Euclidean distance between the center of the attribution class and the fingerprint information of each reference point in the attribution class.

[0110] The method of calculating the Euclidean distance between any two pieces of fingerprint information in this embodiment is the same as that in th...

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Abstract

The embodiment of the invention provides an indoor location method and system. When a location request sent by a location object is received, obtaining fingerprints to be measured of an object to located; calculating Euclidean distances between the fingerprints to be measured and the center of each fingerprint class in a position fingerprint library; determining a fingerprint class having the shortest Euclidean distance from the fingerprints to be measured as a belonging class; and determining whether the fingerprints to be measured are located at the edge of the belonging class or not, determining at least one reference class adjacent to the fingerprint class to be measured about the fingerprints to be measured located at the edge of the belonging class according to the Euclidean distances between the fingerprints to be measured and the center of each fingerprint class, taking fingerprint information and position information of all the reference points in the belonging class and the reference class as reference data, calculating the position of the object to be located according to the fingerprints to be measured, the belonging class and the reference class, and introducing the reference class to improve the location precision of the fingerprints to be measured located at the edge of the belonging class so as to totally improve the indoor location precision.

Description

Technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to an indoor positioning method, device, and system. Background technique [0002] With the development of WIreless-Fidelity (WIFI) technology and the widespread use of smart terminals, signal sources (AP, Access Point) that can provide WIFI networks are becoming more and more popular in indoor environments. Personal homes, cafes, APs are provided in libraries, airport lounges, shopping malls and other premises, and WIFI technology has the characteristics of fast communication speed, stable signal, strong anti-interference ability, and high equipment penetration. WIFI-based indoor positioning methods have become current indoor positioning The core of technology. [0003] At present, the most widely used indoor positioning method based on WIFI is the received signal strength RSSI (Received Signal Strength Indication) indoor positioning method, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
CPCG01S5/0252
Inventor 张道琳魏进武博格利蒋成王笑
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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