KR101297483B1 - A method for tracking position and a position tracking system - Google Patents

Abstract

Location tracking method according to an embodiment of the present invention comprises the steps of storing satellite location information in the server; A wireless tag accessing the server to receive the satellite location information; Attempting to detect a satellite based on the satellite position information; Determining the location method by comparing the detected number of satellites with a preset value; Calculating a current position of the wireless tag according to the determined positioning scheme.

Description

Location tracking method and location tracking system {A METHOD FOR TRACKING POSITION AND A POSITION TRACKING SYSTEM}

The present invention relates to a location tracking method and a location tracking system, and more particularly, to a location tracking method and a location tracking system for changing the positioning method through satellite sensing. More specifically, the present invention relates to a location tracking method and a system for receiving a location information from a server that stores satellite location information in advance to determine a location method, and calculating a current location of a tag.

Recently, a location tracking service using a wireless network has been provided as a way to prevent various crimes and lost children, such as kidnapping and kidnapping of children. In addition, a location tracking service using a wireless network is used for the management of construction materials and labor at the time of construction site.

Here, as a service related to location tracking, a technology for tracking a location using a mobile phone, a technology for tracking a location using an AGPS terminal, and a technology for tracking a location using a Wi-Fi are known.

However, when using a mobile phone, it is not suitable for young children because it is difficult to accurately track the location and must have a mobile phone.

In the case of location tracking using an AGPS terminal, a separate AGPS terminal must be kept, which causes a problem of high cost and limited service. In addition, even if AGPS is used, it takes a long time to calculate the initial position, so the position measurement takes a long time, and there is a problem that the battery consumption increases.

Wi-Fi-based location tracking service is also proposed.

1 is a view showing a location tracking method using Wi-Fi. The location tracking method using Wi-Fi as shown in FIG. 1 sends a location information of an AP close to a wireless tag to a location calculation server (RTLS server, Real Time Lcation System server) and calculates the location at the server.

However, the Wi-Fi-based location tracking method has a problem that accurate location measurement is possible only if the access point or tag node is densely installed. In particular, in the case of the outdoor, there is a disadvantage that the compact installation is impossible because the equipment and power construction for the tag node and the access point must be installed.

It is an object of the present invention to provide an economical and low power location tracking method and system.

In addition, a combination of A-AGPS technology and WIFI technology provides a location tracking method and system capable of fast positioning.

A location tracking method according to an embodiment of the present invention for achieving the above object comprises the steps of: storing satellite location information in a server; A wireless tag accessing the server to receive the satellite location information; Attempting to detect a satellite based on the satellite position information; Determining the location method by comparing the detected number of satellites with a preset value; Calculating a current position of the wireless tag according to the determined positioning scheme.

In addition, a location tracking system according to an embodiment of the present invention for achieving the above object is a server for storing satellite position information; And a wireless tag connected to the server to receive the satellite location information, wherein the wireless tag determines a positioning method by comparing the detected number of satellites with a preset value according to the received satellite location information. The measurement information is transmitted to the server according to the determined positioning method, and the server calculates a current position of the radio tag based on the received measurement information.

According to an embodiment of the present invention, by using the A-AGPS method and the WIFI method enables fast location tracking, effective indoor and outdoor positioning, and brings cost reduction.

In particular, by using the A-AGPS technology that stores the satellite position information in the server in advance, there is an effect that can implement a fast position measurement and low power.

In addition, the location tracking convenience can be increased by quickly switching the indoor and outdoor positioning judgment.

1 is a diagram illustrating a location tracking method using Wi-Fi.
2 is a view schematically showing a location tracking system according to an embodiment of the present invention.
3 is a view showing the location tracking system for each component according to an embodiment of the present invention.
4 is a flowchart illustrating a location tracking method in order according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of a wireless tag 100 of a location tracking system according to an embodiment of the present invention.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

The suffix "module" and " part "for components used in the following description are given merely for ease of description, and the" module "and" part "

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

As used herein, terms used in the present invention are selected from general terms that are widely used in the present invention while taking into account the functions of the present invention, but these may vary depending on the intention or custom of a person skilled in the art or the emergence of new technologies. In addition, in certain cases, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in the corresponding description of the invention. Therefore, it is intended that the terminology used herein should be interpreted based on the meaning of the term rather than on the name of the term, and on the entire contents of the specification.

2 is a view schematically showing a location tracking system according to an embodiment of the present invention.

As shown in FIG. 2, the position tracking system according to an embodiment of the present invention includes a satellite from the satellite base station 400 and the satellite base station 400 that communicate with the satellite 500 and store satellite position information. A wireless tag 100 having a server 300 for receiving and storing location information, an AGPS module 120, and a Wi-Fi module 130, and an AP 200 for communication between the wireless tag 100 and the server 300. And a client 600 for receiving a location tracking service.

The satellite base station 400 communicates with the satellite 500 and provides satellite location information generated based on the position of the satellite 500 to the server 300.

In addition, the server 300 receives and stores satellite location information, and transmits the stored satellite location information to the wireless tag 100 when the wireless tag 100 requests it.

On the other hand, the server 300 receives the position measurement data measured by the AGPS module from the wireless tag 100, or receives the identification information (SSID) and the received signal strength (RSSI) of the neighboring AP 200, the wireless tag ( Calculate the current position of 100).

Meanwhile, the server 300 periodically calculates and updates the current location of the wireless tag 100, and provides a location tracking service based on the calculated location of the wireless tag 100 when the client 600 requests it. Can be.

The wireless tag 100 includes an AGPS module 120 and a short range communication module for calculating a location based on a signal received from the satellite 500, and the short range communication module may be a Wi-Fi module 130.

In addition, the wireless tag 100 attempts to detect the satellite 500 according to the received satellite location information, and determines the positioning method by comparing the detected number of the satellites 500 with a preset number. The positioning method may include a method of calculating a current position through an AGPS module and a method of calculating a current position through a proximity communication module.

Here, the wireless tag 100 may determine whether it is indoor based on the detected number of the satellites 500, which provides a system that may determine whether indoor or outdoor is faster than the conventional method.

Therefore, the wireless tag 100 determines that the number of the satellites 500 is more than three, for example, to determine the outdoor location and performs positioning using the AGPS method. It is possible to perform the positioning using the identification information and the received signal strength of the).

Meanwhile, the AP 200 is connected to the wireless tag 100 and the server 300 in a wireless communication, for example, in a Wi-Fi manner, and enables data transmission and reception between the wireless tag 100 and the server 300. In addition, the wireless tag 100 receives identification information of the neighboring AP 200, measures the received signal strength and transmits to the server 300, the server 300 based on the received information of the wireless tag 100 You can calculate your current location.

The client may request a location tracking service from the server 300 and receive a service from the server 300. The client 600 may be, for example, a smartphone or a computer for location management.

3 is a view for explaining the operation of each component of the location tracking system according to an embodiment of the present invention.

Referring to Figure 3 will be described in detail each of the components of the location tracking system according to an embodiment of the present invention.

The satellite 500 communicates with the AGPS module or the satellite base station 400 included in the wireless tag 100, and transmits position information of the satellite 500 to a communication target.

The satellite base station 400 communicates with the satellite 500, calculates the position of each satellite 500, and forms and stores satellite position information based on the calculated position. Satellite location information refers to data for providing initial satellite location information on which the wireless tag 100 is based in determining a location. In the present invention, the positioning of the AGPS method is possible by using such satellite position information.

The Assisted Global Positioning System (AGPS) method refers to a method of storing satellite position information in advance in the base station 400 or the server 300 and calculating an initial position of the satellite using the stored satellite position information. This method is different from the existing GPS module directly receiving the satellite position information through communication with the satellite 500, since the initial position of the satellite is calculated by using the satellite position information data received from the server 300, This can shorten the calculation time (Cool Start time).

In addition, the server 300 receives and stores satellite position information from the satellite base station 400 in advance in order to use the AGPS scheme. The server 300 may transmit the stored satellite location information to the wireless tag 100 according to a request of the wireless tag 100.

Meanwhile, the server 300 receives satellite measurement data or neighbor AP information (SSID) and received signal strength information (RSSI) from the wireless tag 100 to calculate a current position of the wireless tag 100.

There may be several ways for the server 300 to calculate the current location of the wireless tag 100. When receiving satellite measurement data, the position of the wireless tag 100 may be calculated based on the received data.

When receiving the identification information and the received signal strength information of the peripheral AP 200, the received signal strength is converted into distance information, and the location information is calculated by mapping the identification information of the peripheral AP 200 with a previously stored electronic map database. do. Here, the method of calculating the position may be a fingerprint-based algorithm or, in the absence of an electronic map, a method of calculating a position after calculating a distance by using triangulation light pring formula.

Meanwhile, the wireless tag 100 receives satellite location information from the server 300 and attempts satellite detection to communicate with the satellite. As described above, unlike the existing GPS module directly collecting satellite location information, the AGPS method attempts to communicate with satellites using previously stored satellite location information. This has the effect of reducing the initial satellite 500 position calculation time.

The wireless tag 100 compares the number of detected satellites with a preset value and determines a positioning method. There may be two ways of positioning.

First, if the number of detected satellites is less than three, for example, it can be determined that the room. This is because no more than two satellites can pinpoint the location of the tag.

Therefore, if the number of satellites is less than a predetermined value, it can be determined that the location is located indoors that may cause problems in GPS accuracy and reliability. In the case of indoors, the location tracking is switched using more accurate short-range communication.

Here, the short-range communication is, for example, Bluetooth (Bluetooth), Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Digital Living Network Alliance (DLNA), etc. Communication standard, and for connection with a wireless network, for example, Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access) Communication standard can be used.

As described above, the indoor location tracking method transmits the identification information and the received signal strength information of the neighboring AP 200 capable of short-range communication to the server 300 and calculates the location at the server 300.

On the other hand, if the number of detected satellites is more than three, for example, since it is possible to determine the more accurate position through the AGPS module, receiving the position measurement data through the communication with the satellite 500, the server 300 receives the received data ) To calculate the location of the wireless tag 100.

As such, the location tracking system according to an embodiment of the present invention can selectively determine the positioning method of the AGPS method and the short-range wireless communication method according to the number of detected satellites 500, thereby making the location tracking more economical and low power efficient. Makes this possible.

4 is a flowchart illustrating a location tracking method in order according to an embodiment of the present invention.

Hereinafter, a location tracking method according to an embodiment of the present invention will be described in order with reference to FIG. 4.

First, the satellite 500 transmits a signal capable of forming location information of the satellite 500 through communication with the satellite base station 400 (S100).

In addition, the satellite base station 400 generates and stores satellite 500 position information so as to determine the position of the satellite 500 over time based on the received signal (S110). The satellite 500 position information is used as initial calculation data for the AGPS module to connect to the satellite 500 later.

Thereafter, the server 300 requests the satellite location information to the satellite base station 400, and the satellite base station 400 transmits the satellite location information as a response (S120). The received satellite location information is stored in a storage unit (not shown) of the server 300 (S130). The server 300 stores and updates the received satellite location information so that the latest satellite location information can be maintained.

Meanwhile, the wireless tag 100 requests a connection to any one of the neighboring APs 200 in order to access the server 300 (S101), and the data with the server 300 through the AP 200 which is granted a connection permission. Transmit and receive (S102).

When the wireless tag 100 is connected to the server 300, the wireless tag 100 receives satellite position information from the server 300 (S140). Then, attempts to detect the satellite 500 according to the received position information (S150).

Then, it is determined whether the number of detected satellites 500 is predetermined, that is, for example, three or more satellites are detected (S160).

If the number of detected satellites 500 is less than three, it is determined that the room is indoors, and may be switched to short-range wireless communication, for example, Wi-Fi positioning (S170).

In addition, the wireless tag 100 may measure and transmit the neighbor AP 200 identification information and the received signal strength to the server 300 for the Wi-Fi positioning (S180).

On the other hand, if the number of detected satellites 500 or more is switched to the positioning method of the AGPS method (S190). Accordingly, the position data measured from the satellite can be transmitted to the server 300 in the AGPS method (S200).

Thereafter, the server 300 calculates the current position of the wireless tag 100 based on the received peripheral AP 200 identification information, received signal strength information, or position data through AGPS, and calculates the calculated position value. Save or update (S210).

In addition, the server 300 provides a service for tracking the location of the wireless tag 100 to the client 600 according to the stored location value (S220). As a method of providing a location tracking service to the client 600, there may be a method of providing a location tracking service using a geographic information service that provides a surrounding map and related information.

5 is a diagram illustrating a configuration of a wireless tag 100 among components of a location tracking system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the wireless tag 100 of the location tracking system according to an embodiment of the present invention includes an antenna 190, a Wi-Fi module 130, an AGPS module 120, a control unit 110, and storage. The unit 150 may include a power supply unit 160 and a display unit 140.

The antenna 190 serves to support radio wave transmission and reception between the wireless tag 100 and the AP 200 or the wireless tag 100 and the satellite 500. Various radio communication methods may be used for the radio transmission and reception method.

In addition, the Wi-Fi module 130 is connected to the antenna 190 to enable the wireless tag 100 to wirelessly access the AP 200, and to enable data transmission and reception with the server 300 via the AP 200. .

In addition, the AGPS module 120 is connected to the antenna 190 so that the wireless tag 100 detects the satellite 500 and enables communication with the satellite 500.

The controller 110 may control the overall operation of the wireless tag 100, process data received by each communication module, and control the processed data to be stored in the storage 150. In addition, the controller 140 may control to display various information of the wireless tag 100 on the display 140.

The storage unit 150 may be used to store satellite position information received from the server 300, for example, a flash memory type, a hard disk type, or a multimedia card micro type. card micro type), a card type memory (eg, SD or XD memory, etc.), RAM, or ROM (EEPROM, etc.).

The wireless tag 100 may further include a display unit 140 for displaying the identification information and various data of the wireless tag 100 to inform the user.

Accordingly, the wireless tag 100 may be manufactured in various forms such as a name tag tag 170 and a construction material tag 180. The displayed screen may include a tag holder's photo, name, phone number, or tag. It may include the number of construction materials attached, the name of the person in charge, and the telephone number.

The display unit 140 displays the driving signal by converting an image signal, a data signal, an OSD signal, etc., processed by the controller 110 into R, G, and B signals, respectively, under control of the controller 110. Create

The display unit 140 may be a PDP, an LCD, an OLED, a flexible display, a 3D display, or the like.

On the other hand, the wireless tag 100 may include a power supply unit 160 for the operation of each module. The power supply unit 160 may be, for example, a small power supply such as a battery.

The location tracking method and the location tracking system according to the present invention described above enable more economical and fast location tracking, and as the computational speed is reduced, efficient location tracking with low power is possible. In addition, since the indoor and outdoor composite positioning is possible, there is an advantage of reducing the high cost due to the dense installation of the location tracking AP.

The above-described location tracking method and location tracking system according to the present invention can be stored in a computer-readable recording medium that is produced as a program for execution on a computer. Examples of the computer-readable recording medium include ROM, RAM, CD-ROMs, magnetic tapes, floppy disks, optical data storage devices, and the like, and also include those implemented in the form of carrier waves (eg, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes and code segments for implementing the above method can be easily inferred by programmers of the technical field to which the present invention belongs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

100: wireless tag 200: AP
300: server 400: satellite base station
500: satellite

Claims (16)

A radio tag accessing a server to receive satellite position information;
Attempting to detect a satellite based on the satellite position information;
Comparing the number of detected satellites with a predetermined value and if the number of detected satellites is more than the predetermined value is determined by the AGPS positioning method, otherwise the positioning method is determined by a near field communication-based positioning method step; And
Calculating a current position of the wireless tag according to the determined positioning scheme,
Computing the current position,
When the positioning method is determined as the AGPS positioning method, operating an AGPS module based on the received satellite position information, and calculating a current position according to the result;
When the positioning method is determined as the short-range communication-based positioning method, network identification information of at least one access point of a neighboring access point is received, and the network identification information and the received signal strength are provided to the server. Causing a server to calculate a current location based on the network identification information and the received signal strength. delete delete The method of claim 1,
And transmitting a result of the operation of the AGPS module to the server (300) through an access point located nearby. delete delete The method of claim 1,
Storing the calculated current location in the server, and periodically updating the location tracking method. The method of claim 1,
Storing satellite location information in the server,
And receiving and storing the satellite location information from a satellite base station. A server for storing satellite location information; And
A wireless tag connected to the server to receive the satellite location information,
The wireless tag compares the number of detected satellites with a preset value according to the received satellite position information and determines the AGPS positioning method when the number of detected satellites is greater than or equal to the preset value. Based on the positioning method to determine the positioning method,
If the positioning scheme is determined as the AGPS positioning scheme, the wireless tag operates an AGPS module based on the received satellite position information, calculates a current position according to the result,
When the positioning method is determined as the short-range communication-based positioning method, the wireless tag receives network identification information of at least one access point among neighboring access points, and transmits the network identification information and the received signal strength to the server. Offering,
The server calculates a current position based on the network identification information and the received signal strength.
Location tracking system. delete delete 10. The method of claim 9,
The wireless tag is a location tracking system for transmitting the operation result of the AGPS module to the server through an access point located around. delete delete 10. The method of claim 9,
The server stores the calculated current location and periodically updates it. 10. The method of claim 9,
Further comprising a satellite base station in communication with the satellite to store satellite location information,
The server is a location tracking system for receiving and storing the satellite location information from the satellite base station.

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