KR20040087292A - Method and system for identifying terminal position using paging channel - Google Patents

Abstract

PURPOSE: A method and system for checking a position of a terminal by using a paging channel are provided to check a position of a slave terminal by changing only elements of a master terminal and a slave terminal. CONSTITUTION: When a user of a master terminal(400) requests a current position coordinate of a slave terminal(500) or when time stored in a periodic position request information storing unit has come(S800), the master terminal(400) creates a slave terminal position coordinate request message and transmits the message through a paging channel(S802). A mobile communication network(200) transfers the message to the slave terminal(500)(S804). The slave terminal(500) determines whether a phone number of the master terminal(400) is identical to a phone number stored in a master terminal information storing unit of the slave terminal(500)(S806). If the phone number of the master terminal(400) is identical to the phone number stored in the master terminal information storing unit of the slave terminal(500), a GPS signal processing unit of the slave terminal(500) extracts a position coordinate from a GPS(S808). The slave terminal(500) converts the extracted GPS position coordinate into text and transmits it to the master terminal(400) through the paging channel(S810). The master terminal(400) checks the phone number of the slave terminal(500), applies the received GPS position coordinate to a map database and displays corresponding geographical information on a display unit of the master terminal(400)(S812).

Description

Method and system for identifying terminal position using paging channel {Method and system for identifying terminal position using paging channel}

The present invention relates to a method and a system for determining a location of a terminal using a mobile communication network, and in particular, to identify a location of a slave terminal using a paging channel for transmitting an SMS text message without modifying any components of the conventional mobile communication network. To a method and system.

The technology for identifying the location of a terminal using a mobile communication network is steadily developing. In particular, the caregiver of infants or adolescents and the caregivers of demented elders are increasing day by day to confirm the location of these infants, adolescents or elderly dementia by having a small terminal. The conventional positioning technique invented in response to this need is largely divided into two.

First, as shown in Figure 1 as a method of identifying the location of the mobile communication terminal with the help of the Home Location Register (HLR), which is a component of the mobile communication network, will be described in detail with reference to FIG.

1 is a flowchart illustrating a method for locating a terminal according to the prior art disclosed in Korean Patent Laid-Open No. 10-2004-0033469 (published on April 28, 2004). In order to confirm the location of the terminal according to FIG. 1, the guardian terminal must be pre-registered in the lost child service operated by a specific mobile communication service provider. Mobile Switching Center (MSC), Visitor Location Register (VLR), Home Location Register (HLR), SMS Message Center (SMC), Base Station Transceiver System (BTS), etc., which are components of a mobile communication network described below are known to those skilled in the art. And described in detail in Korean Patent Publication No. 10-2004-0033469, the description thereof will be omitted and only the flow of FIG. 1 will be described.

First, in the MSC, if YES is set in the information stored in the VLR, all location registration conditions are updated in the HLR.

When all location registration conditions occur in the lost terminal, the location information of the lost terminal is updated in the HLR (S102). In this state, when the child is out of the guardian's protection scope and the child is lost, the guardian requests the MSC to confirm the location of the child using the guardian terminal (S104). The MSC requests the feature code from the HLR using the feature code corresponding to the location request (S106). The HLR performs authentication by searching whether the number of the guardian terminal is a number registered in the number information of the lost child (S108). If the authentication is successful, the HLR sends an announcement code (Anncode) for successful authentication to the MSC (S110). In the MSC, the announcement message corresponding to the announcement code is transmitted to the guardian terminal (S112), and the guardian listens to the announcement using the guardian terminal and waits for pressing the end button. The HLR searches for the number of the Mia registered with the number of the guardian terminal and notifies the SMS server of the location information corresponding to the number of the Mia (S114). The SMS server notifies the SMC of the location information in the form of a short message (S116), and the SMC delivers the short message to the guardian terminal waiting through the MSC (S118).

In the prior art shown in FIG. 1, since the location request of the lost child, the announcement of the announcement to the guardian terminal is made through the traffic channel, communication costs are high, and the guardian pays a certain fee every month and finds the lost child of the specific mobile communication company. Not only is there a problem that one guardian cannot locate multiple guardians because they have to subscribe to the service, and the guardian and the guardian must be mapped in a 1: 1 manner. There is also a problem that the error range of the position is considerable apart.

In order to improve the position resolution of the prior art as shown in FIG. 1, a GPS receiver is mounted on a receiving mobile terminal to transmit GPS coordinate information through a traffic channel of the mobile communication network, and a map of the transmitted GPS coordinates in the mobile communication network server. There is a technique of preparing information and transmitting this map information to a calling mobile terminal using a traffic channel.

2 is a view showing a method for confirming the location of a terminal using GPS according to another prior art. Referring to FIG. 2, first, the transmitting terminal 100 transmits a location request message request of the receiving terminal to the mobile communication network 200 using a traffic channel (S200). The mobile communication network 200 transmits this message request to the receiving terminal 300. The receiving terminal 300 is equipped with a GPS receiver capable of receiving GPS satellite information, and the receiving terminal receives the GPS information (S204). The receiving terminal 300 transmits the received GPS coordinates to the mobile communication network using the traffic channel (S206). The server of the mobile communication network 200 prepares the position of the transmitted GPS coordinates in the map information (S208), and transmits the prepared map information to the transmitting terminal 100 through the traffic channel (S210). Then, the transmitting terminal 100 displays the transmitted map information (S212).

The prior art shown in FIG. 2 improves the resolution of the position compared to the prior art shown in FIG. 1 by receiving GPS satellite information. However, as in the prior art shown in FIG. The server of a large mobile communication network should have map information data, and in particular, there is a problem that the traffic is overloaded in the step S210 of transmitting the prepared map information to the transmitting terminal 100 through the traffic channel, as described in FIG. One prior art also has a problem in that, like the marine technology described in FIG. 1, the service must be bound to a specific mobile communication service provider.

The present invention is to solve the above problems, the at least one slave terminal corresponding to the master terminal, the communication cost is low by using the paging channel of the mobile communication network, and in providing a positioning service of the conventional mobile communication network It is an object of the present invention to provide a positioning method and system that can establish an independent positioning service without being bound to a mobile communication service provider by not modifying any components at all.

1 is a flowchart illustrating a method for determining a location of a terminal according to the prior art;

2 is a view illustrating a method for checking a location of a terminal using GPS according to another prior art;

3 is a schematic diagram showing an environment in which a positioning system of a terminal using a paging channel according to the present invention operates;

4 is a block diagram showing a configuration of a master terminal of a positioning system of a terminal using a paging channel according to the present invention;

5 is a block diagram showing a configuration of a slave terminal of a positioning system of a terminal using a paging channel according to the present invention;

6 is a block diagram showing the internal configuration of the GPS signal processing unit of the slave terminal of the system according to the present invention;

FIG. 7A illustrates an example of a format of a message transmitted to a slave terminal using an SMS text message in a master terminal of the system according to the present invention, and FIG. 7B is transmitted to a master terminal using an SMS text message from a slave terminal. FIG. 7C illustrates a database stored in the periodic location request information storage unit of the master terminal, and FIG. 7D is stored in the periodic location request information storage unit of the slave terminal. 7E illustrates an example of a database stored in a periodic location request GPS information accumulating storage unit of a master terminal.

8 is a view illustrating an operation of a positioning system of a terminal using a paging channel according to the present invention;

9 is a view illustrating another operation of the positioning system of the terminal using the paging channel according to the present invention.

In order to achieve the above object, the positioning system according to the present invention is composed of one or more master terminal, mobile communication network and one or more slave terminal, the master terminal can send and receive SMS text messages through the paging channel of the mobile communication network SMS transmitting and receiving unit, a slave terminal information storage unit for storing one or more of the slave terminal information corresponding to the master terminal, used to display geographic information corresponding to the GPS location coordinates contained in the SMS text message sent from the slave terminal A controller for searching whether the map database and the inputted slave terminal telephone number or identification code match the slave terminal telephone number or identification code stored in the slave terminal information storage and controlling the component; The slave terminal may be an SMS transceiver for transmitting and receiving SMS text messages through a paging channel of a communication network, a master terminal information storage unit for storing one or more of the master terminal information corresponding to the slave terminal, and a GPS satellite signal to receive a current location. GPS signal processing unit for calculating information and SMS text message sent from the master terminal is analyzed to determine whether the transmitted master terminal phone number or identification code matches the master terminal phone number or identification code stored in the master terminal information storage unit. And a control unit for controlling the component.

In addition, the positioning method according to the present invention comprises the steps of transmitting a position coordinate request message request of the slave terminal from the master terminal to the mobile communication network; The slave terminal receiving the position coordinate request message request determines whether the telephone number or identification code of the master terminal that has transmitted the message matches the telephone number or identification code of the master terminal stored in the master terminal information storage unit of the slave terminal. Doing; Extracting location coordinates from the GPS if the determination result of the step is matched; Converting the extracted GPS position coordinates into text and transmitting the same to a master terminal through a paging channel; And transmitting, by the master terminal receiving the GPS location coordinates, the GPS location coordinates to the map database to display corresponding geographic information on the display unit.

Hereinafter, a method and system for determining a location of a slave terminal using a paging channel for transmitting an SMS text message without modifying any component of the mobile communication network (hereinafter, referred to as "location checking method according to the present invention" or "the present invention) The preferred embodiment of the " positioning system " will be described in detail with reference to the accompanying drawings.

3 schematically illustrates an environment in which a positioning system of a terminal using a paging channel according to the present invention operates. The mobile communication network 200 of FIG. 3 refers to a general mobile communication network and should be broadly interpreted to include a cellular network, a PCS network, a DCS network, an IMT-2000 network, and the like. In general, a mobile communication service provider must modify the operation of a component of the mobile communication network 200 in order to provide an additional service. According to the present invention, the position of the terminal is changed without modifying the operation of the component of the mobile communication network 200. You can check it.

The master terminal 400 is a terminal possessed by a parent, a guardian, etc., and therefore, a corresponding geographic information of GPS coordinates where the slave terminal is located is preferably a smartphone, a PDA phone, etc. having a large memory capacity and a wide display unit. The number of slave terminals 500_1, 500_2,..., 500_n corresponding to the master terminal 400 is one or more, and the slave terminals 500_1, 500_2,..., 500_n corresponding to the master terminal 400. The telephone number or the identification code of (which is assigned a unique identification code to distinguish these slave terminals corresponding to the telephone number of the slave terminal) is stored in the slave information storage unit 412 of FIG.

The slave terminals 500_1, 500_2,..., 500_n are terminals possessed by a location subject such as an infant and a guardian, and the number of slave terminals corresponding to the master terminal 400 may be one or more (eg, the master terminal). The owner of 400 is the mother, and the owner of the slave terminal corresponding to the master terminal may be a plurality of first-year elementary school children, 6-year-old second children, etc.).

4 is a block diagram illustrating a configuration of a master terminal of a positioning system of a terminal using a paging channel according to the present invention. Referring to FIG. 4, the master terminal 400 includes a control unit 402, an SMS transmission / reception unit 404, a map database 406, a keypad unit 408, a display unit 410, and a slave terminal information storage unit 412. It is configured to include, and may further include a periodic location request GPS information accumulation storage unit 414, the periodic location request information storage unit 416 and the timer 416.

The SMS transmitter / receiver 404 exchanges text messages between the master terminal 400 and the slave terminal 500 through a paging channel. 7A illustrates a format of an SMS text message transmitted from the SMS transmitter / receiver 404 to the slave terminal 500. Referring to FIG. 7A, the position coordinate request message of the slave terminal 500 transmitted from the master terminal 400 to the slave terminal 500 is a function code + corresponding to the position coordinate request of the slave terminal. It may consist of the telephone number of the master terminal + the telephone number of the slave terminal, but the scope of the present invention is not limited by this message format.

The slave terminal information storage unit 412 stores one or more slave terminal phone numbers or unique identification codes corresponding to the master terminal 400. For example, if there are two slave terminals corresponding to the master terminal (terminal possessed by the parent), two telephone numbers or unique identification codes are assigned to the slave terminal information storage 412. Stored.

The map database 406 stores a map provided by a general geographic information system (GIS), which is well known to those skilled in the art, and thus a detailed description thereof will be omitted.

The keypad unit 408 inputs slave terminal 500 information to the slave terminal information storage unit 412 of the master terminal 400 or inputs slave terminal information and a setting period to the periodic position request information storage unit 416. In order to check the current position of the slave terminal 500, an SMS text message is input and a normal mobile communication terminal performs an input function.

Checking the position of the slave terminal 500 in the master terminal 400 is performed by inputting an SMS text message whenever necessary in the master terminal 400 and the period (for example, 30 minutes, inputted from the master terminal 400) There may be two methods for checking the position of the slave terminal 500 by one hour unit). The periodic location request information storage unit 416 stores the location checking period of the slave terminal 500 input from the master terminal 400. 7C exemplarily illustrates a database stored in the periodic location request information storage unit 416 of the master terminal 400. Referring to FIG. 7C, for example, the periodic location request information DB of the master terminal 400 includes a 'phone number (or identification code) of the slave terminal # 1' 416_1 and 'the location time period set in the master terminal 400'. Setting period '(416_10) is stored, and as many as the number of slave terminals 500 corresponding to the master terminal 400, the phone number (or identification code) of the slave terminal #n and the location confirmation setting cycle according to the telephone number are stored. Can be.

In the periodic position request GPS information accumulating storage unit 414, when the setting period is set in the periodic position request information storage unit 416, the GPS position coordinate values of the slave terminal 500 periodically transmitted from the slave terminal 500 are stored. Stored. FIG. 7E exemplarily illustrates a database stored in the periodic location request GPS information accumulating storage unit 414 of the master terminal 400. Referring to FIG. 7E, for example, the periodic location request GPS information accumulated DB of the master terminal 400 includes the phone number (or identification code) 414_1 of the slave terminal # 1 and the GPS when the first setting cycle is reached. Position coordinate values' (414_10), 'GPS position coordinate values when the second setting cycle is reached' (414_11), ..., 'GPS position coordinate values when the nth setting cycle is reached' (414_1n) If the set period is set according to the slave terminal 500 corresponding to the master terminal 400 and the set period is set, the phone number (or identification code) of the slave terminal # n and the first to n-th set period according to the phone number. Each GPS position coordinate value when is reached is stored. By doing so, the position of each time zone according to the setting period of the slave terminal 500 can be tracked.

The display unit 410 is typically a liquid crystal display (LCD) as a display device of the master terminal 400, but is not particularly limited thereto.

The timer 416 is a means for determining whether the corresponding period is reached when the setting period is registered in the periodic location request information storage unit 416 in the master terminal 400.

It has an ordinary configuration and is not particularly limited thereto.

5 is a block diagram illustrating a configuration of a slave terminal 500 of a system for locating a terminal using a paging channel according to the present invention. Referring to FIG. 5, the slave terminal 500 includes a control unit 502, an SMS transmission / reception unit 504, a GPS signal processing unit 506, a master terminal information storage unit 512, and a keypad unit 508. The voice guide unit 510, the voice guide information storage unit 514, the periodic location request information storage unit 516, and a timer 518 may be further selectively included.

The SMS transmitter / receiver 504 exchanges text messages between the master terminal 400 and the slave terminal 500 through a paging channel. 7B illustrates an SMS text message format transmitted from the SMS transmitter / receiver 504 of the slave terminal 500 to the master terminal 400. Referring to FIG. 7B, the message 'converting the extracted GPS location coordinates to a character and transmitting them to a paging channel' transmitted from the slave terminal 500 to the master terminal 400 is a function code + slave terminal phone number + latitude / longitude. GPS position coordinates, etc., but the scope of the present invention is not limited by this message format.

The GPS signal processor 506 receives GPS satellite signals and calculates current location information and time information. A detailed description of the functions of the GPS signal processor 506 will be described later with reference to FIG. 6.

The master terminal information storage unit 512 stores one or more master terminal telephone numbers or unique identification codes corresponding to the slave terminal 500. For example, a phone number or a unique identification code of a master terminal (for example, a terminal possessed by a dad) corresponding to a slave terminal (eg, a terminal possessed by a son of a first grade elementary school) is stored in the master terminal information storage unit 512. The master terminal 500 corresponding to the slave terminal 500 may be one or more. By configuring the master terminal information storage unit 512 in the slave terminal 500, if the terminal receives the location coordinate request message from another terminal that is not authenticated (that is, another terminal that is not corresponding to the slave terminal 500), it may be rejected. .

The voice guide unit 510 is a means for transmitting a specific SMS text message to the slave terminal 500 and transmitting the guide voice stored in advance to the holder of the slave terminal 500. For example, when the slave terminal 500 receives a specific SMS text message, the voice guide unit 510 may, for example, provide a voice guide of "Stop playing at Cheol-Su Playground and return home quickly."

The voice guide information storage unit 514 stores voice guide information so that the voice guide unit 510 can transmit a voice.

The keypad unit 508 is a means for inputting information of the master terminal 500 into the master terminal information storage unit 512 of the slave terminal 500 or inputting information into the periodic position request information storage unit 516.

As described above with reference to FIG. 4, the positioning of the slave terminal 500 in the master terminal 400 is performed by inputting an SMS text message whenever necessary in the master terminal 400 and in the master terminal 400. In addition to the method of confirming the position of the slave terminal 500 by a predetermined period (for example, a 30-minute unit, an hour unit, etc.), the cycle may be input to the periodic position request information storage unit 516 of the slave terminal 500. It is possible. Detailed description thereof will be described later with reference to FIG. 9.

7D exemplarily illustrates a database stored in the periodic location request information storage unit 516 of the slave terminal 500. Referring to FIG. 7D, for example, the periodic location request information DB of the slave terminal 500 includes a 'phone number (or identification code) of the master terminal # 1' 516_1, and a 'setting period' 516_10 which is a set positioning time period. Is stored, the phone number (or identification code) and location setting period of the master terminal # n as the number of the master terminal 400 corresponding to the slave terminal 500 may be stored.

The timer 518 is a means for determining whether the slave terminal 500 reaches a corresponding period when the set period is registered in the periodic location request information storage unit 516. The timer 518 has a conventional configuration and is not particularly limited thereto.

6 is a block diagram showing an internal configuration of the GPS signal processing unit 506 of the slave terminal of the system according to the present invention. Referring to FIG. 6, the GPS signal processor 506 includes an antenna 506_1, a high frequency processor 506_2, a signal processor 506_3, a microoperator 506_4, a clock unit 506_5, a memory 506_6, and an asynchronous serial interface. 506_7.

The GPS satellites 90 are satellites that transmit location and time information and are components of GPS. A GPS (Global Positioning System) is a position measuring system which consists of a GPS satellite 90, a reference station (not shown), and a GPS receiver (it is called "GPS signal processing part 506" in this invention). The GPS satellite 90 is composed of 24 satellites orbiting the Earth's orbit once every 12 hours at an altitude of 20,200 km, and the reference station calculates the latest orbit, power, and control clock of the GPS satellite 90 by the latest. It is installed in six places as a terrestrial system that transmits updated information to each satellite through a terrestrial antenna (506_1) for updating with information of and controlling satellites. The GPS receiver is a device that receives signals from at least four satellites, calculates three-dimensional information of x, y, z and time, and converts them into information such as position and velocity.

Antenna 506_1 receives GPS satellite signals, including 1,575.45 MHz carriers used for energy amplification and precision positioning of signals, C / A codes and signals used for satellite identification and time of arrival of radio waves. There is a navigation message that synchronizes the data and transmits other information, including satellite orbits. It is preferable to use a microstrip antenna as the antenna 506_1 which can be used for the GPS signal processing unit 506.

The high frequency processor 506_2 is connected to the antenna 506_1 and converts the high frequency GPS satellite signal (carrier of 1.2 or 1.5 GHz) received through the antenna 506_1 into an easy intermediate frequency.

The signal processor 506_3 is connected to the high frequency processor 506_2 and recovers the GPS satellite signal modulated at an intermediate frequency into an original signal to separate the carrier wave, navigation message, and code transmitted from the GPS satellite 90.

The signal processor 506_3 performs a function of calculating a navigation message and a pseudo distance transmitted from the GPS satellite through despreading to restore the GPS satellite signal transmitted by spread spectrum to the original signal. The navigation message is 1,500 feet in size and transmitted at a rate of 50 bits per second, with one frame containing five subframes, the contents of the first three subframes being the same, but the fourth and fifth respectively. It is composed of individual information (almanac or ionospheric correction coefficient) for GPS satellite 90, and the content is changed every frame and is composed of 1 to 25 frames. Here, the almanac is a series of variables included in the navigation message of the GPS satellite 90, which is used by the GPS signal processor 506 to calculate the approximate position of the GPS satellites 90. The navigation message is a 50 Hz signal consisting of data bits describing the GPS satellite 90's orbit, clock correction amount and other system parameters.

The micro-operation unit 506_4 controls the signal processing unit 506_3, receives the navigation message and the code from the signal processing unit 506_3, calculates and transmits the current position information. The micro-operator 506_4 decodes the unique code of the GPS satellite 90 and based on the navigation message and the pseudo distance applied from the signal processor 506_3, that is, the latitude and longitude of the GPS signal processor 506. , Altitude), and control to transmit the processed result to a universal asynchronous receiver / transmitter (UART) 506_7. The clock unit 506_5 generates a reference signal (time) for calculating a pseudo distance, which is compared with time data among the GPS signals.

The memory 506_6 stores a control program executed by the microoperation unit 506_4 and temporarily stores various data to be processed.

The asynchronous serial interface 506_7 incorporates a serial transmission interface program to enable serial transmission of the position information transmitted from the microoperation unit 506_4 to the information processing unit 60.

In general, the GPS signal processing unit 506 transmits upgraded data once per second and uses an ASCII code as an I / O code. The asynchronous serial interface 506_7 has a function of adjusting a data transmission time, and since ASCII code is used as a communication transmission standard, it is not necessary to have a separate code conversion program.

8 is an exemplary operation of the positioning system of the terminal using the paging channel according to the present invention. Referring to FIG. 8, a flowchart of a case where the master terminal 400 requests the position coordinates of the slave terminal 500 is shown. First, when the current position coordinate of the slave terminal 500 is requested by the user of the master terminal 400 or when the time stored in the periodic position request information storage unit 416 of FIG. 4 is reached (S800), the master The terminal 400 creates a message as illustrated in FIG. 7A and transmits a 'location coordinate request message request of a slave terminal' through a paging channel of the mobile communication network 200 (S802). The mobile communication network 200 transmits this message to the slave terminal 500 (S804). The slave terminal 500 receiving the message has a phone number (or identification code) of the transmitting terminal 400 that has requested the position coordinate request message stored in the master terminal information storage unit 512 of the slave terminal 500. It is determined whether the phone number (or identification code) matches (S806). Step S806 is for rejecting the positioning from other master terminals 400 (eg, requesting coordinates of position from a non-protector, etc.) that do not correspond to the slave terminal 500. Those skilled in the art will understand the nature of the present invention. You can change this without deviating. If the determination result of step S806 is "Yes", the GPS signal processor 506 of the slave terminal 500 extracts the position coordinates from the GPS (S808). The information transmitted to the master terminal 400 among the extracted GPS location coordinates may include latitude / longitude / altitude as shown in FIG. 7 and may include only latitude / longitude. Next, the slave terminal 500 composes a message as illustrated in FIG. 7B and transmits the message to the master terminal 400 through the paging channel. That is, the extracted GPS position coordinates are converted into text and transmitted to the paging channel (S810). The master terminal 400 receiving the message checks the phone number (or identification code) of the slave terminal 500 and applies the received GPS location coordinates to the map database 406 to display the corresponding geographic information on the master terminal. In operation 812, the display is displayed on the display.

9 is a view illustrating another operation of the positioning system of the terminal using the paging channel according to the present invention. Referring to FIG. 9, when a period is set in the periodic location request information storage unit 516 of the slave terminal 500 illustrated in FIG. 5, the slave terminal 500 sets its own GPS position coordinates at every master interval. To 400. Specifically, the slave terminal 500 determines whether the set period stored in the periodic location request information storage unit 516 is reached (S900), and the GPS signal processing unit 506 of the slave terminal 500 performs the GPS. The position coordinates are extracted from (S902). The information transmitted to the master terminal 400 among the extracted GPS location coordinates may include latitude / longitude / altitude as shown in FIG. 7 and may include only latitude / longitude. Next, the slave terminal 500 composes a message as illustrated in FIG. 7B and transmits the message to the master terminal 400 through the paging channel. That is, the extracted GPS position coordinates are converted into text and transmitted to the paging channel (S904). The master terminal 400 receiving the message checks the phone number (or identification code) of the slave terminal 500 and applies the received GPS location coordinates to the map database 406 to display the corresponding geographic information on the master terminal. In operation 906, the display is displayed on the display.

In the above, the present invention has been described with reference to the preferred embodiments. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the present invention, the position of the slave terminal can be confirmed by only changing the components of the master terminal and the slave terminal without changing the components of the conventional mobile communication network at all, so that the location service is not restricted to the mobile communication service provider. It is possible to provide a, and by using a paging channel can be implemented a location service at a low cost.

Claims (6)

One or more master terminals, mobile communication networks and one or more slave terminals, The master terminal may be an SMS transceiver for transmitting and receiving SMS text messages through a paging channel of a mobile communication network, a slave terminal information storage unit storing one or more pieces of slave terminal information corresponding to a master terminal, and an SMS transmitted from the slave terminal. Whether the map database used to display the geographic information corresponding to the GPS location coordinates contained in the text message and the slave terminal phone number or identification code entered match the slave terminal phone number or identification code stored in the slave terminal information storage. A control unit for searching and controlling each component of the master terminal; The slave terminal may be an SMS transceiver for transmitting and receiving SMS text messages through a paging channel of a communication network, a master terminal information storage unit for storing one or more of the master terminal information corresponding to the slave terminal, and a GPS satellite signal to receive a current location. GPS signal processing unit for calculating information and SMS text message sent from the master terminal is analyzed and the master terminal telephone number or identification code transmitted is matched with the master terminal telephone number or identification code stored in the master terminal information storage unit. And a controller for controlling each component of the slave terminal. Positioning system of the terminal using a paging channel, characterized in that it comprises a. The system of claim 1, wherein the master terminal further comprises a periodic location request information storage unit storing a location checking period of the slave terminal input from the master terminal. The position of the terminal using the paging channel according to claim 1, wherein the master terminal further includes a periodic position request GPS information accumulating and storing unit configured to store GPS position coordinate values of the slave terminal periodically transmitted from the slave terminal. Confirmation system. The positioning system of a terminal using a paging channel according to claim 1, wherein the slave terminal further includes a periodic position request information storing unit storing a positioning period of the slave terminal input from the slave terminal. Transmitting a position coordinate request message request of a slave terminal from the master terminal to the mobile communication network through a paging channel; The slave terminal receiving the position coordinate request message request determines whether the telephone number or identification code of the master terminal that has transmitted the message matches the telephone number or identification code of the master terminal stored in the master terminal information storage unit of the slave terminal. Doing; Extracting location coordinates from the GPS at the slave terminal when the determination result of the step is matched; Converting the extracted GPS location coordinates into text and transmitting the same to a master terminal through a paging channel; And displaying, by the master terminal receiving the GPS position coordinates, the GPS position coordinates applied to the map database to display corresponding geographic information on the display unit. Determining whether the slave terminal reaches a set time stored in the periodic position request information storage unit of the slave terminal; Extracting location coordinates from the GPS at the slave terminal when it is determined that the device has arrived; Converting the extracted GPS location coordinates into text and transmitting the same to a master terminal through a paging channel; And displaying, by the master terminal receiving the GPS position coordinates, the GPS position coordinates applied to the map database to display corresponding geographic information on the display unit.