WO2019182179A1

WO2019182179A1 - Wireless positioning method based on combination of wi-fi ap and ibeacon

Info

Publication number: WO2019182179A1
Application number: PCT/KR2018/003436
Authority: WO
Inventors: 신요안; 이승우; 진근영
Original assignee: 숭실대학교산학협력단; 새한테크놀로지(주)
Priority date: 2018-03-23
Filing date: 2018-03-23
Publication date: 2019-09-26

Abstract

The present invention relates to a wireless positioning system based on a combination of a Wi-Fi AP and IBEACON and, particularly, to a wireless positioning method of a wireless positioning system using a plurality of Wi-Fi APs and BLE beacon terminals, the method comprising the steps of: configuring a zone for each Wi-Fi AP, and generating a fingerprinting DB by using a BLE Beacon; scanning Wi-Fi AP information from a positioning target terminal so as to identify a current zone; and identifying a location of the positioning target terminal by using a TDoA wireless positioning technique using a Wi-Fi AP RSSI when the number of Wi-Fi APs scanned by the positioning target terminal is equal to or more than three, and identifying a location of the positioning target terminal via a fingerprinting technique using a BLE Beacon RSSI value within the range of the scanned Wi-Fi APs when the number of Wi-Fi APs scanned by the positioning target terminal is less than three. The present invention relates to a technology of combining and using a Wi-Fi AP and a BLE Beacon, which can complement disadvantages of each technology so as to provide a precise positioning performance over a wider range.

Description

Wireless positioning method based on WIFI AP and IBEACON composite

The present invention relates to a wireless positioning method based on the WIFI AP and the IBEACON composite, and more particularly, to a wireless positioning method based on the WIFI AP and the IBEACON composite, which guarantees high precision wireless positioning performance using the WIFI and the IBEACON.

Recently, with the rapid development of ICT (Information and Communication Tehnology) technology, the demand for technology based on location information (LBS) has increased rapidly.

Wireless localization technology is a physical layer technology for providing LBS. In an outdoor environment, high-precision location information is provided to a terminal using a global navigation satellite system (GNSS) such as a global positioning system (GPS). However, indoors have a disadvantage in that the positioning accuracy is drastically reduced due to the shadowing effect of the GPS signal.

In order to solve this problem, studies are being actively conducted to provide high-precision indoor location information using various wireless communication standards such as RFID (Radio Frequency Identification), ZigBee, WiFi (Wireless Fidelity), and BLE (Bluetooth Low Energy). have.

However, since Wi-Fi has been developed for communication purposes, when the ultra-precision of less than 1m is required, an error rate is inevitable due to interference between frequencies. In addition, like BLE, because of the nature of the frequency of the ISM band, it cannot pass through the human body, the wall, etc., and thus it is difficult to use it because the unit cost is high when the Wi-Fi AP is installed in a large amount. On the other hand, BLE Beacon uses the frequency hopping-spread spectrum (FH-SS) technique to check the frequency band in order to avoid interference between frequencies due to the characteristics of Bluetooth. As a result, RSSI values necessary for BLE Beacon-based positioning are not transmitted constantly.

Therefore, a high-definition positioning technology is required to compensate for the disadvantages of the Wi-Fi AP-based positioning technology and the iBeacon technology.

The background technology of the present invention is disclosed in Korean Patent Registration No. 10-1634879 (June 23, 2016.).

The technical problem to be achieved by the present invention is to provide a wireless positioning method based on the WIFI AP and IBEACON combination to ensure high precision wireless positioning performance using WIFI and IBEACON.

According to an embodiment of the present invention for achieving the above technical problem, in the wireless positioning method of a wireless positioning system using a plurality of Wi-Fi AP, BLE Beacon terminal, for each Wi-Fi AP to set the zone and BLE Beacon Generating a fingerprinting DB using the information, scanning the information of the Wi-Fi AP from the positioning target terminal to identify the current zone, and when the number of the Wi-Fi APs scanned from the positioning target terminal is three or more If the location of the positioning target terminal is determined using a TDoA radiolocation technique using a Wi-Fi AP RSSI and the number of Wi-Fi APs scanned from the positioning target terminal is less than 3, the range of the scanned Wi-Fi AP And determining the location of the positioning target terminal through a fingerprinting technique using a BLE Beacon RSSI value.

According to the present invention, a technology utilizing a combination of a Wi-Fi AP and a BLE Beacon can be used to compensate for the shortcomings of each technology and provide precise positioning performance in a wide range.

1 is a flowchart illustrating a radio positioning method of a radio positioning system according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

Indoor Wi-Fi AP-based wireless positioning technology includes Cell-ID technology for determining the location of an AP when there is one Wi-Fi AP, and ToA (Tima of Arrival) or TDoA that can be used when there are three or more APs. The location is measured using a triangulation-based positioning algorithm such as Time Difference of Arrival. Fingerprinting technique to calculate.

In addition, Beacon has been in the spotlight for indoor positioning technology due to its low cost, and uses the BLE frequency in the same ISM band as Wi-Fi, which allows the same technique as Wi-Fi-based wireless positioning technology. Precise positioning performance is shown.

According to an embodiment of the present invention, a wireless positioning system uses a combination of a Wi-Fi frequency and a Bluetooth BLE frequency band wireless positioning technology used in an ISM unlicensed band in a wireless sensor network (WSN). It is to lower. In the wireless sensor network, wireless positioning technology measures the user's location in order to provide location-based services and can use GPS based on Global Navigation Satellite System (GNSS) outdoors, but indoors It is not easy to use GNSS based satellite service. To this end, the location of wireless terminals located inside a building can be determined by using the frequencies of ISM bands such as Wi-Fi or Bluetooth used indoors, or provide services such as indoor wireless maps.

Recently, due to the rapid development of ICT technology, wireless devices using ISM frequency bands increase, resulting in interference between frequencies, resulting in a problem of deteriorating the overall radiolocation performance of the WSN. Therefore, the wireless positioning system according to the present invention proposes a precise wireless positioning system using iBeacon after searching the approximate location by dividing the area through the Wi-Fi AP. This technique can mitigate the frequency interference between the Wi-Fi AP and iBeacon to provide high-precision wireless positioning performance.

The wireless positioning system according to an embodiment of the present invention stores location information installed for a plurality of Wi-Fi APs and BLE Beacon terminals.

The wireless positioning system sets a zone for each Wi-Fi AP using a plurality of Wi-Fi APs and BLE Beacon terminals, and generates a fingerprinting map using the BLE Beacons.

Here, the wireless positioning system sets a zone of each Wi-Fi AP so as to avoid frequency interference between the plurality of Wi-Fi.

In addition, the wireless positioning system scans the information of the Wi-Fi AP from the positioning target terminal to check the current zone where the positioning target terminal is located.

In this case, when the number of Wi-Fi APs scanned from the positioning target terminal is three or more, the wireless positioning system checks the position of the positioning target terminal using the TDoA wireless positioning technique using the Wi-Fi AP RSSI.

Here, the TDoA radiolocation technique refers to a technique of positioning a position using triangulation using signals received from three or more APs.

Meanwhile, when the number of Wi-Fi APs scanned from the positioning target terminal is less than three, the wireless positioning system scans the information of the Wi-Fi AP from the positioning target terminal so that the TDoA technique cannot be used to identify the current zone. At this time, the location of the positioning target terminal is identified through a fingerprinting technique using a BLE Beacon RSSI value within the scanned Wi-Fi AP range.

As described above, according to the exemplary embodiment of the present invention, the Wi-Fi AP and the BLE Beacon are used in combination to compensate for the shortcomings of each technology and provide precise positioning performance in a wide range.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

In the wireless positioning method of a wireless positioning system using a plurality of Wi-Fi AP, BLE Beacon terminal

Setting a zone for each Wi-Fi AP and creating a fingerprinting DB using BLE Beacon;

Checking the current area by scanning information of the Wi-Fi AP from the positioning target terminal, and

When the number of Wi-Fi APs scanned from the positioning target terminal is three or more, the position of the positioning target terminal is checked by using a TDoA radiolocation technique using the Wi-Fi AP RSSI, and the Wi-Fi AP scanned from the positioning target terminal is checked. If the number of Fi AP is less than three, the wireless positioning method comprising the step of identifying the location of the positioning target terminal through a fingerprinting technique using a BLE Beacon RSSI value within the scanned Wi-Fi AP range.