KR20130028317A - Mobile terminal for position tracking, appratus providing position tracking service and position tracking system - Google Patents

Abstract

PURPOSE: A portable terminal for location tracking, a location tracking service providing device thereof, and a location tracking system thereof are provided to perform indoor and outdoor real time location tracking by using a portable terminal including a GPS(Global Positioning System) module and a Wi-Fi module. CONSTITUTION: A GPS module(302) receives satellite location information. A Wi-Fi module(301) scans surrounding APs(Access Point). The Wi-Fi module receives network identification information from one or more APs. If a location state of a portable terminal is indoor based on the network identification information and receiving signal strength information of the APs, the portable terminal transmits the network identification information and the receiving signal strength information to a server. If the location state is outdoor, the portable terminal transmits the satellite location information to the server. [Reference numerals] (300) Antenna; (301) Wi-Fi module; (302) GPS module; (303) Acceleration sensor; (306) Battery; (308) Name tag(embedded GPS+WiFi+LCD); (309) Watch(embedded electronic watch+GPS+WiFi); (310) Child pager

Description

Location tracking portable terminal, location tracking service providing device and location tracking system {MOBILE TERMINAL FOR POSITION TRACKING, APPRATUS PROVIDING POSITION TRACKING SERVICE AND POSITION TRACKING SYSTEM}

The present invention provides a service that can effectively respond to the location information of the target child to parents or related public organizations when an emergency situation such as abduction and kidnapping that can occur on the way to and from school children by real-time location tracking It is to.

Recently, as crimes and childbirths inflicted on children such as kidnapping and kidnapping of children have increased, parents with children had to wait with anxiety at all times when their children went out. In order to relieve such anxiety, when children go out, they often talk with their children by giving them mobile phones, or parents go out together.

On the other hand, as a service related to the location of a person, a technology for tracking a location using a mobile phone and a location tracking using a GPS terminal are known.

However, when using a mobile phone, accurate location tracking is difficult and it is not suitable for young children because it is necessary to carry a mobile phone. There is a limited problem.

The technique to solve this problem is to provide a location tracking service for children using GPS or Zigbee.

In the case of GPS, since the location tracking service is not available indoors (second state), it is difficult to determine the location of the target student when exposed to the movement and crime of the student in the classroom.

1 is a conceptual diagram of a Zigbee-based child protection system.

The Zigbee terminal 11 sends a signal to the Zigbee reader 12, the Zigbee reader 12 communicates with the server 15 via the Zigbee network 13 and the gateway 14, the server via the communication network 16 The location information is transmitted to the related organization 17, the parent PC 18 or the parent mobile phone (19). In this case, location tracking is performed using RSSI (Received Singnal Strength Indication).

However, in the case of RSSI through ZigBee, when using the most accurate fingerprinting method, the distance between readers should be 30m to maintain accuracy of 2 ~ 5m, but if more than 100m, There is a situation that can not be guaranteed even up to 30m accuracy. Therefore, the Zigbee reader should be installed densely, but there is a problem that can increase the accuracy of the position tracking.

In addition, as a method of calling an emergency, the child reassurance service is called a child reassurance zone, and the location is provided to the parent of the target child or related public agency by generating an event using the SOS button. To use the corresponding method. However, when the target child fails to operate the SOS button and is abducted in the car of the criminal and exits the safety zone, if an emergency event occurs, since the location tracking is impossible, there is a problem in that it does not have enough time to cope with it.

In addition, even if the location information of the tracking target is known, only the current status of the tracking target is detected only by the location information. Therefore, it is difficult to accurately determine what kind of situation is the emergency situation during SOS.

In order to solve the above problems, an object of the present invention is to enable indoor and outdoor real-time location tracking by using a portable terminal combined with a GPS module and a Wi-Fi module. Through this, it is possible to track the location wherever the subject is indoors, and the built-in GPS to ensure the accuracy of the location tracking GPS even outdoors. In addition, the acceleration sensor is attached to not only used for the data of position calculation, but also to provide SOS signal and position information to the target parent and related organizations in real time by operating the acceleration sensor when the object is kidnapped and moved in the car. It is done. In addition, the object of the present invention is to provide screen information on a protected object in connection with a network camera or CCTV.

A portable terminal for tracking a location according to an embodiment of the present invention includes a first module for receiving satellite location information; And a second module configured to scan APs located in the vicinity and to receive network identification information from at least one AP, wherein the location of the portable terminal based on the network identification information and the received signal strength information from the AP is indoor. In this case, the received network identification information and received signal strength information are transmitted to a server, and when the location state is outdoors, the satellite location information is transmitted to the server.

In addition, the location tracking service providing apparatus according to an embodiment of the present invention, the service providing apparatus, comprising: a receiving unit for receiving network identification information, received signal strength information, or satellite location information of the neighboring AP from the portable terminal; And a location calculator configured to calculate a location of the portable terminal using the received network identification information and the received signal strength information of the neighboring AP when the location state of the portable terminal is indoor.

The location tracking system according to an embodiment of the present invention scans a neighboring AP to receive network identification information of at least one AP, and when the location state based on the received identification information and the received signal strength is indoors, the reception is performed. A portable terminal for transmitting the received information and the received signal strength, and for transmitting the satellite location information in the outdoor; An AP for transmitting at least one of network identification information, received signal strength information, and satellite location information transmitted from the portable terminal to a location tracking service providing apparatus; And a server that calculates the location of the portable terminal based on the information received from the AP and whether the location status of the terminal is indoor, and provides the calculated location information according to a request of a client device.

According to an embodiment of the present invention, the child to be protected has a location tracking effect wherever the child is in the classroom, and has an effect of ensuring the accuracy of location tracking that the GPS has in the outdoors by embedding the GPS. In addition, the acceleration sensor is attached to the data of the position calculation, and the child is protected and the acceleration sensor is activated when moving in the car to provide the SOS signal and location information to the parents and related organizations of the child in real time. It can work. In addition, there is an effect that can provide the screen information for the protection target in connection with the network camera or CCTV.

1 is a configuration diagram of a Zigbee location tracking system.
2 is a block diagram of an embodiment of a location tracking system according to the present invention.
3 is a block diagram of an embodiment of a portable terminal according to the present invention.
4 is a flowchart illustrating an embodiment of a portable terminal according to the present invention.
5 is a configuration diagram of an embodiment of a location tracking service providing apparatus according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the position tracking system according to an embodiment of the present invention.

2 is a configuration diagram of an embodiment of a location tracking system according to the present invention, Figure 3 is a block diagram of a portable terminal according to the present invention.

The portable terminal is a portable terminal for location tracking and may be an RTLS Real Time Location System TAG (RTLS) 20 according to an embodiment of the present invention.

The RTLS TAG 20 includes a first module for receiving satellite position information and a second module for receiving network identification information from the AP. Here, the first module may be a GPS module 302 for receiving GPS information from a satellite, and the second module may be a WI-FI module 301 as a communication module for short-range wireless communication with an access point (AP). .

Accordingly, the RTLS TAG 20 and the AP may be connected by short-range wireless communication, for example, WiFi, but are not limited thereto. Here, the short range wireless communication refers to a communication method having coverage within a range of several tens of meters from the AP.

In addition, the AP may be a plurality or more, and the AP and the location tracking service providing apparatus may be connected by wire or wirelessly. The AP may be a wireless AP 22 according to an embodiment of the present invention.

In addition, the location tracking service providing apparatus according to the present invention may be a server connected to the wireless AP 22 and the Internet network 23, hereinafter referred to as integrated management server 26.

The integrated management server 26 may receive the location information, the emergency signal, the acceleration information, and the like from the RTLS TAG 20 through the wireless AP 22 through the receiver. The receiver may be an internet network based TCP / IP interface 57.

And, the integrated management server 26 includes a location calculation unit for calculating the location of the RTLS TAG 20, the location calculation unit may be a server included in the integrated management server 26 according to an embodiment of the present invention, Hereinafter referred to as RTLS server 24.

In addition, the integrated management server 26 may include a camera unit for receiving a screen shot from the network camera, which may also be a server included in the integrated management server 26 according to an embodiment of the present invention, Called camera server 25.

The integrated management server 26 may transmit the screen shot by the network camera corresponding to the location information of the RTLS TAG 20 and the location information calculated from the RTLS server 24 to the client device from the camera server 25. The client device may be a parent smartphone or cell phone 27, a parent PC 28, a location tracking device 29 of the relevant organization.

Hereinafter, the operation of the location tracking system and the configuration of the location tracking portable terminal according to the present invention will be described in detail with reference to FIGS. 2 and 3.

Referring to FIG. 3, the RTLS TAG 20 basically includes an antenna 300, a WI-FI module 301, a GPS module 302 and an acceleration sensor 303, a CPU 304, and a battery 306. can do.

In addition, the RTLS TAG 20 may further include a display unit 305 capable of displaying a current state or a message, and a key operation unit 307 for inputting ON / OFF, YES, NO, SOS signals, and the like. It may include.

Here, the CPU 304 of the RTLS TAG 20 may be embedded in the Wi-Fi module 301 and control the GPS module 302 and the acceleration sensor 303 using the embedded CPU 304.

The RTLS TAG 20 as described above can be carried in a variety of forms as a subject of protection of a location tracking system according to the present invention, such as children, for example, the name tag 308 of the built-in LCD, electronic clock There may be a form such as a built-in watch 309, children PAGER (310).

First, when the RTLS TAG 20 is divided to children to be protected, the RTLS TAG 20 transmits and receives signals to and from the wireless AP 22 installed in and around the school, and connects the location information to the Internet network 23. Is transmitted to the integrated management server 26).

Thereafter, the integrated management server 26 analyzes the signal received from the RTLS TAG 20 to the TCP / IP interface 57 which is a receiver and calculates a position through the RTLS server 25.

If the received signal is an emergency SOS signal, the emergency message is transmitted to the client device, that is, the parent smartphone or mobile phone 27, the parent PC 28, and the related organization 29 through Wi-Fi and the telephone network. Be prepared to respond to emergencies.

The emergency signal is generated in the RTLS TAG 20 and the integrated management server 26 transmits an emergency message to the client devices 27 to 29 when the emergency signal is received.

There are three cases in which the emergency signal is generated.

First, you have left the safety zone. The range of the safety zone may be set in the integrated management server 26, and when the location information is out of the range of the safety zone, the integrated management server 26 may transmit an emergency message to the client devices 27 to 29. .

Second, when the holder of the RTLS TAG 20 has pressed the emergency SOS button. When the emergency button of the RTLS tag is input, the RTLS generates an emergency signal and transmits an emergency message to the client devices 27 to 29 when the integrated management server 26 receives it.

Third, the acceleration sensor 303 automatically detects acceleration of the car and generates an emergency signal. In this case, it is assumed that a child is abducted and transported to a car and cannot press the emergency button.

Here, the RTLS TAG 20 transmits the acceleration information sensed by the acceleration sensor 303 through the Internet network 23 using the WI-FI module 301, and the integrated management server 26 is a receiver for TCP / This is received via the IP interface 57. When the acceleration is measured at a reference value (preferably 10 KM / H) or more, an emergency signal is generated, and an emergency message is transmitted to the client devices 27 to 29.

In addition, the location tracking system according to the present invention may support a bi-directional communication service capable of transmitting and responding to messages between the client devices 27 to 29 and the integrated management server 26. In the case of the RTLS TAG 20 having the display unit 305, the integrated management server 26 may provide a text message service and transmit texts to the RTLS TAG 20.

In addition, when the key operation unit 307 is included, the holder of the RTLS TAG 20 may respond whether or not the text message is confirmed through a Yes or No button operation. Accordingly, when the integrated management server 26 is in the emergency state according to the emergency signal reception, it may be possible to terminate the emergency situation by the operation of the parent PC 28 or the smartphone 27.

On the other hand, the location tracking system according to the present invention may further provide a geographic information service including a neighboring map and geographic information based on the location information to the client device.

Geographic information service is a service that provides not only location information but also information on surrounding environment, maps, major facilities, etc. at the same time, and screen information to make it easier to visually identify the location.

When a parent accesses the integrated management server 26 using a smart phone 27 or the like, a GIS (Geometric Information Service) and an RTLS TAG (GIS), which is a geographic information service provided by a display application running on the integrated management server 26, may be used. By receiving the location information of 20) at the same time can be provided with a geographic information service.

4 shows a flowchart of the operation of the RTLS TAG 20.

Referring to FIG. 4, the operation sequence of the RTLS TAG 20 will be described. First, the RTLS TAG 20 basically maintains a sleep mode 401 to reduce power consumption and is operated by a timer event 402. You can start Wake up.

Thereafter, the RTLS TAG 20 wakes up the Wi-Fi module (403) and scans the neighboring AP (403). During the scan, network identification information (SSID) of neighboring APs is collected and received signal strength (RSSI) is also acquired (404).

The RTLS TAG 20 determines whether the current state of the RTLS TAG 20 is outdoor (first state) or indoor (second state) using the collected SSID information and RSSI (405). The determination of whether or not indoors may include a method of determining that the location state is outdoor when the location of the AP and the distance to the AP determined from the collected SSID and RSSI information correspond to a predetermined distance, and is determined by the RTLS TAG 20 itself. In addition, there may be a method for determining using the RTLS server 25 through the information received from the integrated management server 26. Therefore, it is not limited to a judgment subject.

First, when it is determined that the location state is outdoor (first state), the RTLS TAG 20 wakes up the GPS module, controls the GPS module, and performs operation for obtaining location data information of the relevant GPS. (406). In operation 407, the nearest AP may be accessed to transmit the location information calculated by the GPS module to the RTLS server.

On the other hand, the present invention may control two ways the GPS module. There may be a method of handing over GPS data, and there may be a method of always improving performance by shortening GPS position tracking accuracy and initial position tracking calculation using AGPS technology.

According to the AGPS method, once the GPS server in the RTLS server receives the initial GPS data through the wired network and transmits the information to the RTLS TAG (20). The received GPS initial data is transmitted to the GPS module through the CPU in the RTLS TAG 20, and the GPS module calculates a location using the data without collecting GPS satellite information. Through this, the position data of the protection target can be calculated faster than the method of handing over GPS data.

On the other hand, if it is determined that the indoor (second state) through the AP scan SSID and RSSI information collection 404, the collected information is connected to the RTLS server in the integrated management server through the connection with the nearest AP (RSSI, SSID) In order to perform indoor (second state) location tracking (407).

Thereafter, when the timer event release signal is input (408), the mode returns to the sleep mode and maintains the sleep state, and waits for the timer event (401).

However, if the release signal is not input, generates an emergency signal, and the emergency tracking location tracking equipment 29 of the parent PC 28, parent smartphone 27 or related organizations through the integrated management server 26 And so on (410).

In addition, when the timer event cancel signal is not input, when a child or the like, who is the subject of protection, presses the SOS button, when an acceleration of more than a reference value is detected by an acceleration sensor operation or the position information of the RTLS TAG 20 indicates a safety zone. There may be deviations. In this case, the RTLS TAG 20 does not return to the SLEEP mode, collects the AP scan and RSSI information again (404), and continues the above-described position tracking until the TIMER EVENT release signal is input.

5 is a detailed configuration diagram of the integrated management server 26, the RTLS server 25, and the camera server 24.

Referring to Figure 5 looks at the data processing and operation of each server. First, the integrated management server 26 as a location tracking service providing apparatus according to the present invention manages the TCP / IP interface 57 as a receiver, the RTLS server 25 as a location calculator, and the camera server 24 as a camera. It may be a server for controlling and relaying communication between the client devices (27 to 29).

In addition, the RTLS server 25 is a server for calculating the location information of the target and transmitting it, the RTLS engine 56, GPS server and DB 55, the indoor location information DB (54) for calculating the location using the RSSI value And RTLS middleware 53.

When the RTLS engine 56 determines that the position state of the RTLS TAG 20 is outdoor (first state) or the position state determined by the RTLS TAG 20 itself is outdoor (first state), As described above, location information may be calculated using GPS.

In addition, when the location state of the RTLS TAG 20 is indoor (second state), the RTLS engine 56 may statistically calculate a location using an electronic map DB previously collected using a fingerprint based algorithm. .

If there is no electronic map, the distance can be calculated using the Prince's formula, and the triangulation formula is solved using the Least Square Method and the Chan and Ho Method to calculate the location of the RTLS TAG 20 in the room (second state). have.

In the case of the method of calculating the location information of the RTLS engine 56 as described above, in order to obtain high precision, the collected propagation map itself must have characteristics, and for this purpose, the AP spacing must be densely installed to obtain the desired precision.

Therefore, indoors (second state) can be installed densely inexpensive AP, so the present invention applies this method only indoors (second state), and can calculate location information using GPS in outdoor (first state). have.

Specifically, in the case of the RSSI method, when the AP is installed in an average of about 30m, it is possible to calculate a relatively reliable location accuracy. However, in the case of outdoor (first state), since the AP usually goes over 1 million won by the outer case, it is impossible to use the AP less than 100,000 won installed at 30m intervals indoors (second state), and the number of installations also increases.

However, when the GPS is used in the outdoor (first state) as in the present invention, when the communication distance of the Wi-Fi RTLS TAG 20 is 200 m in the outdoor (first state), the AP can be installed at intervals of 400 m. You can expect to reduce the cost.

Meanwhile, the camera server 24 may periodically store and manage images of each network camera and transmit image information at the request of the integrated management server 56.

In addition, when the parent wants to see the image of the target child, the camera server 24 receives the location information of the RTLS TAG 20 and connects with the nearby network camera to store the image information of the protected child through the integrated management server 56. Can be transferred to the parent's smartphone and PC.

In addition, the application block 58 of the integrated management server 26 may include a display application 50, a client connection handler 51, and an integrated management application 52.

The display application 50 may be responsible for a geographic information service, that is, a GIS (Geometry Information Service) service, and may provide a service for displaying the location of the RTLS TAG 20 to the screen to the client devices 27 to 29.

The client connection handler 51 handles the GIS screen when the client device such as the parent PC 28, the smart phone 27, and the location tracking device 29 of the related organization attempts to connect to the integrated management server 26. And transmit the network camera image to the client.

The integrated management application 52 processes the text service of the parent, and when an emergency SOS situation occurs, it sends an emergency message to the client device (27 ~ 29) to respond to it. In addition, it is possible to register the range of the safety zone so that it can send its own emergency SOS message to the client device when it leaves the specific area.

 In addition, the application block 58 is interlocked with the client connection handler 51 and the network camera 22 connected to the wireless AP to automatically select the network camera to process the image information, the camera server 24 By relaying this it is possible to control the shooting information and transmission information of the network camera according to the client's request.

The photographing information may include a camera's vertical, horizontal rotation angle, zoom level, and the like, and transmission information may include resolution, image quality, sharpness, bit rate, frame rate, and screen size. Accordingly, the client may select in detail the contents of the shooting information transmitted from the camera server and the size of the data transmitted per time. This allows clients to better understand the current location, situation and surroundings of the protected object through a nearby camera screen.

The above-described 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 in a computer. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, 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.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

20: RTLS TAG 21: WIFI Network
22: Wireless AP and network camera 23: Internet network
24: camera server 25: RTLS server
26: integrated management server 27: parent smartphone
28: Parent PC 29: Related Institutions
300: antenna 301: WIFI module
302: GPS module 303: acceleration sensor
304: CPU 305: display unit
306: battery 307: key operation
308: Name tag 309: watch
310: children PAGER 50: DISPLAY APPLICATION
51: client connection handler 52: Integrated management APPLICATION
53: RTLS middleware 54: indoor location information DB
55: GPS server and DB 56: RTLS engine
57: TCP / IP interface 58: APPLICATION block

Claims (17)

In a portable terminal,
A first module for receiving satellite position information; And
A second module configured to scan an access point (AP) located in the vicinity of the network and receive network identification information from at least one AP,
When the location status of the portable terminal based on the network identification information and the received signal strength information from the AP is indoor, the received network identification information and the received signal strength information are transmitted to a server,
When the location state is outdoor, the location tracking portable terminal to which the satellite location information is transmitted to the server The method of claim 1,
The network identification information and the signal strength information is transmitted to the server via any one of the AP located in the location tracking portable terminal The method of claim 1,
The first module is a location tracking portable terminal operates only when the location state is outdoor. The method of claim 1,
The portable terminal further includes an acceleration sensor,
The portable terminal is a location tracking portable terminal for transmitting the acceleration information sensed by the acceleration sensor to the server. The method of claim 1,
The portable terminal further includes a display unit,
And the display unit displays at least one of a message transmitted from the server and location information of the portable terminal. In the service providing apparatus,
A receiver configured to receive network identification information, received signal strength information, or satellite location information of a neighboring AP from the portable terminal; And
And a location calculator configured to calculate a location of the portable terminal using the received network identification information and the received signal strength information of the neighboring AP when the location of the portable terminal is indoor. The method according to claim 6,
The receiving unit further receives the acceleration information from the location tracking portable terminal,
The service providing device is a location service providing apparatus for transmitting an emergency message to the client device, if the acceleration of the acceleration information is more than the reference value. The method according to claim 6,
The service providing device further provides a geographic information service (GIS) including a surrounding map and geographic information based on the calculated position information to a client device. The method according to claim 6,
The receiving unit further receives a message from a client device,
And the service providing device transmits the received message to the portable terminal. The method according to claim 6,
Further comprising a camera unit for receiving a screen shot from the network camera corresponding to the calculated position information,
And the service providing device transmits the received screen to the client device according to a request of a client device. The method of claim 10,
The service providing device controls a shooting condition of the camera or a transmission condition of a captured screen according to a request of the client device,
The shooting condition may include at least one of a horizontal, vertical rotation angle, and a zoom level of the camera, and the transmission condition may include at least one of a bit rate, a frame rate, an image quality, and a resolution of a screen to be transmitted. . Scans a neighboring AP to receive network identification information of at least one AP; when the location state based on the received identification information and the received signal strength is indoor, the received information and the received signal strength are transmitted; A portable terminal through which location information is transmitted;
An AP for transmitting at least one of network identification information, received signal strength information, and satellite location information transmitted from the portable terminal to a location tracking service providing apparatus; And
When the location of the portable terminal is indoors, the location of the portable terminal is calculated using the received network identification information and the received signal strength information of the neighboring AP, and when the outdoor location is calculated using the satellite location information. And a server for providing the calculated location information at the request of a client device. 13. The method of claim 12,
The portable terminal further includes an acceleration sensor, and transmits the acceleration information sensed by the acceleration sensor to the server through the AP,
And the server transmits an emergency message to the client device when the received acceleration information is equal to or greater than a reference value. 13. The method of claim 12,
The server further provides a geographic information service (GIS) to the client device, the geographic information service comprising a surrounding map and geographic information based on the calculated position information. 13. The method of claim 12,
The server receives a message from the client device, sends the received message to the portable terminal via the AP,
The portable terminal further comprises a display unit for displaying at least one of a message transmitted from the wireless recognition device and the location of the portable terminal. 13. The method of claim 12,
The server further includes a camera unit for receiving a screen shot from the network camera corresponding to the calculated position information,
And the server transmits the captured screen to the client device in response to a request of the client device. 13. The method of claim 12,
The server controls a shooting condition of the camera or a transmission condition of a captured screen according to a request of the client device.
And the shooting condition includes at least one of a horizontal, vertical rotation angle, and a zoom level of the camera, and the transmission condition includes at least one of a bit rate, a frame rate, an image quality, and a resolution of a screen to be transmitted.

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