KR100583425B1 - Method for providing location information using mobile phone - Google Patents

Abstract

The present invention is to provide a location information service method through a mobile communication terminal, a method for a caller to service his location information to a moving receiver through the mobile communication terminal. According to the present invention, when a caller's location information service request is made through a mobile communication terminal, three base stations close to the receiver are selected through the receiver's schematic location information and then transmitted from the receiver to each base station. Receive the location tracking signal to track the location of the receiver's mobile communication terminal. Accordingly, by transmitting the location information between the receiver and the sender according to the location of the receiver to the receiver's mobile communication terminal, the receiver's location information is serviced to the receiver. In this case, as a method of tracking the location of the receiver's mobile communication terminal, it is preferable to use a time of arrival (TOA) method.

According to the present invention, both the sender and the receiver can service their own location information without mounting a GPS receiver in a state in which the caller does not know the location of the moving receiver, and the location information regardless of the receiver's reception environment. Can be provided.

Location information, mobile communication terminal, GPS receiver, base station, digital map

Description

Method for Providing Location Information Using Mobile Phone {Method for Providing Location Information Using Mobile Phone}

1 is a configuration diagram for explaining an example of using a location information service method through a mobile communication terminal according to the present invention.

2 is a configuration diagram of a location information service system for implementing a location information service method through a mobile communication terminal according to an embodiment of the present invention;

3 is a flowchart illustrating an embodiment of a location information service method through a mobile communication terminal according to the present invention.

4 is a conceptual diagram illustrating a method of calculating a position coordinate of a receiver according to an embodiment of the present invention using a TOA method.

Description of the main parts of the drawing

110: caller 111: first mobile communication terminal

120: receiver 121: second mobile communication terminal

122: transceiver 123: second controller

124: storage unit 125: key operation unit

126: display unit 131: first base station

132: second base station 133: third base station

134: fourth base station 140: central control center

141: communication server 142: operation server

143: first control unit 144: user DB server

145: map DB server

The present invention relates to a caller's location information service method, and more particularly, to service a caller's location information to a receiver moving through a mobile communication terminal, by tracking the location of the receiver's mobile communication terminal. The present invention relates to a location information service method through a mobile communication terminal which services location information between a receiver and a sender to a mobile communication terminal of a receiver.

Recently, with the development of the telecommunications industry, the penetration rate of mobile communication terminals has rapidly increased and the proportion of mobile communication terminal users has been increasing.

Accordingly, most of the general people have mobile communication terminals such as PCS, cellular phones, PDAs, etc., and these mobile communication terminals are used as various communication means as well as information transmission means with the other party.

In particular, in recent years, a method of providing location information of a mobile communication terminal has been developed to identify a location of an accidental accident isolated by fire, distress, collapse of a building, etc., or allow an individual to determine the location of the other terminal according to the permission of the other party. .

The current location tracking system uses the method of tracking the location of the person carrying the receiver. The most popular method of receiving GPS signals is the GPS receiver, which measures accurate time and distance from three or more satellites By triangulating the distance, the current position can be calculated accurately.

However, in order for the mobile terminal caller to provide his / her location information to the moving receiver, the receiver needs to accurately determine the location of the receiver, but the receiver's receiving environment is located in an obstacle such as indoors, tunnels, building areas, forests, etc. If you are unable to track your location through the GPS receiver.

In addition, when a GPS receiver is used, an additional GPS receiver must be added to the mobile communication terminal, thereby increasing the cost of manufacturing the terminal, making the terminal bulky and heavy, and consuming a lot of power for fast location tracking. There is a disadvantage.

Accordingly, an embodiment of the present invention is to provide a method in which a caller can service his / her location information to a receiver who is moving nearby through a mobile communication terminal without using a GPS receiver.

The present invention for achieving the above object is a location information service method through a mobile communication terminal, a) a caller location information request signal including the phone number and the approximate location information of the receiver and the unique ID and place of the caller; Transmitting to a central control center using a mobile communication terminal;

b) at the central control center, selecting three base stations in proximity to the receiver through the coarse location information of the receiver, and transmitting a position information disclosure acceptance message to the receiver's mobile communication terminal;

c) accepting the location information by the receiver and transmitting a location tracking signal including the unique ID and transmission time information of the receiver;

d) receiving the position tracking signal through the selected base stations at the central control center and calculating position coordinates of the receiver using a time of arrival (TOA) method as in the following equation;

X = [{(R1 ² -R2 ² )-(X1 ² -X2 ² )-(Y1 ² -Y2 ² )} × (Y1 ² -Y2 ² )-{(R2 ² -R3 ² )-(X2 ^2- X3 ² )-(Y2 ² -Y3 ² )} × (Y1-Y2)] / [2 {(X1-X2) × (Y2-Y3)-(X2-X3) × (Y1-Y2)}]

Y = [{(R1 ² -R2 ² )-(X1 ² -X2 ² )-(Y1 ² -Y2 ² )} × (Y1 ² -Y2 ² )-{(R2 ² -R3 ² )-(X2 ^2- X3 ² )-(Y2 ² -Y3 ² )} × (X1-X2)] / [2 {(X1-X2) × (Y2-Y3)-(X2-X3) × (Y1-Y2)}]

Rn = (Tn-T ') x 300,000 Km / sec, n = 1,2,3

(Where X is the latitude value of the receiver, Y is the longitude value of the receiver, Xn (n = 1,2,3) is the latitude value of base station n (n = 1,2,3), Yn (n = 1,2) , 3) is the longitude value of base station n (n = 1,2,3), Rn (n = 1,2,3) is the distance between base station n (n = 1,2,3) and the receiver, and , T 'is the time when the location tracking signal is transmitted from the mobile communication terminal of the receiver, Tn (n = 1, 2, 3) is the time when the location tracking signal is received from the base station n (n = 1, 2, 3) being.)

e) transmitting, by the central control center, location information of the caller according to the location coordinates of the receiver to a mobile communication terminal of the receiver; And

f) receiving the location information by the receiver.

In the location information service method through the mobile communication terminal according to the present invention, step a) includes a step in which a caller presses a shortcut key for location notification request established in the mobile communication terminal, a unique ID and a place of a caller, and a telephone number of a receiver. It is preferable to include the step of describing the outline position information in text, and transmitting the position notification request signal.

In the location information service method through the mobile communication terminal according to the present invention, step c) preferably transmits a location tracking signal using a shortcut key.

In the method of location information service through the mobile communication terminal according to the present invention, in step e), a method of transmitting the location information of the sender according to the location coordinates of the receiver to the recipient, the location of the sender transmitted in text as the location coordinates. It is preferable to include the step of converting, obtaining map information between the sender from the receiver based on the sender's position coordinates and the receiver's position coordinates, and transmitting the map information to the receiver.
In the location information service method through the mobile communication terminal according to the present invention, the step of transmitting the map information to the receiver includes a direction information and a distance from the receiver to the sender included in the numerical map and the time required based on these messages. It is preferable to transmit in the form of a flat map prepared based on the map information.

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Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the location information service method through a mobile communication terminal according to the present invention.

1 is a configuration diagram illustrating an example in which a location information service method through a mobile communication terminal according to the present invention is used, and FIG. 2 illustrates a location information service method through a mobile communication terminal according to an embodiment of the present invention. It is a block diagram of the location information service system for implementing. 3 is a flowchart illustrating an embodiment of a method of providing location information through a mobile communication terminal according to the present invention, and FIG. 4 is a diagram of calculating a position coordinate of a receiver according to an embodiment of the present invention using a TOA method. Conceptual diagram to illustrate the method.

Referring to Figure 1, the location information service method through the mobile communication terminal according to the present invention can be used in the following cases. That is, the caller 110 may be used when serving the location information of the caller 110 to the second mobile communication terminal 121 of the receiver 120 moving near by the first mobile communication terminal 111. At this time, since the caller 110 does not know the exact position of the receiver 120 and only knows the rough position, the caller 110 first determines the position of the receiver 120 and then from the position of the receiver 120 to the position of the caller 110. It is desirable to provide the location information of the receiver 120.

Thus, an embodiment of a location information service method through a mobile communication terminal according to the present invention will be described with reference to FIGS. 2 to 4.

2 to 4, the location information service system according to the present embodiment includes the first mobile communication terminal 111 of the caller 110 and the receiver 120 of the receiver 120 who wants to receive the location information of the caller 110. 2 the mobile communication terminal 121, the central information center 140, which provides the location information of the caller 110 to the receiver 120 when the caller 110 requests the location information service, and the first mobile communication terminal ( First, second, and third base stations 131, 132, and 133 for tracking the positions of the fourth base station 134 and the second mobile communication terminal 121 connecting the 111 and the central information center 140. It consists of.

The first mobile communication terminal 111 and the second mobile communication terminal 121 is a device for performing a general mobile communication function, the transmission and reception unit 122 for wireless transmission and reception, the storage unit 124 for storing a variety of information , A key control unit 125 having a plurality of numeric keys and various function keys to handle an interface with a terminal caller, a display unit 126 displaying various images and texts, and a second control unit controlling overall operations thereof. 123. In addition, the first mobile communication terminal 111 is provided with a shortcut key for a location notification request for transmitting a location notification request signal with a unique ID for identification thereof, and the second mobile communication terminal 121 identifies its own identification. A location tracking hotkey for generating a location tracking signal including a transmission time information for location tracking together with a unique ID is constructed.

The central information center 140 is a device that binds the first, second, third, and fourth base stations 131, 132, 133, and 134 to control the entire system and perform position calculation. Communication server 141 for wireless transmission and reception between mobile communication terminals 111 and 121 and base stations 131, 132, 133, and 134, arithmetic server 142 for calculating position coordinates, and a caller using a mobile communication terminal The user DB server 144 on which the information of the user is built, the map DB server 145 in which the map information is stored, and a first control unit 143 for controlling the overall flow thereof.

The first, second, third, and fourth base stations 131, 132, 133, and 134 are apparatuses for receiving radio waves transmitted from the first and second mobile communication terminals 111 and 121. The location notification request signal transmitted from the communication terminal 111 and the location tracking signal transmitted from the second mobile communication terminal 121 are respectively received and transmitted to the central information center 140.

An embodiment of a location information service method through a mobile communication terminal according to the present invention using a location information service system having such a configuration will be described below.

First, the caller 110 transmits a location notification request signal to the central telegram center 140 through the first mobile communication terminal 111 (S10). That is, a location information service request is made to provide its location information to the receiver 120. It is preferable that the caller 110 is started by pressing a shortcut key for the location notification request established in the first mobile communication terminal 111, wherein the caller 110 is a unique ID and the place and the receiver of the caller 110 ( The telephone number and the schematic position information of 120 are written in text, and then a position notification request signal including the same is transmitted to the central information center 140. Accordingly, the fourth base station 134 receives the location notification request signal transmitted from the first mobile communication terminal 111 and transmits it to the central control center 140.

Next, the central control center 140 receives the location notification request signal, selects three base stations 131, 132, and 133 close to the receiver 120 through the schematic location information of the receiver 120, and then the receiver. In step S20, the mobile terminal transmits a location information disclosure acceptance query message to the 120. At this time, after searching the user DB server 144 built in the central control server 140 to check whether the unique ID of the sender 110 is a registered ID, and accepts the location information disclosure to the receiver 120 only if the registration ID You can also send a query message.

Next, the receiver 120 accepts the location information disclosure and transmits a location tracking signal including the unique ID and the transmission time information of the receiver 120 (S30). In this case, the location tracking signal transmission method is preferably transmitted using a predetermined shortcut key, and the location tracking signal includes a unique ID and transmission time information of the receiver 120.

Next, the central control center 140 receives the position tracking signal through the first, second, and third base stations 131, 132, and 133 to calculate the position coordinates of the receiver 120 (S40). Here, the first, second, and third base stations 131, 132, and 133 receive the location tracking signal transmitted from the second mobile communication terminal 121, and then include the received time information received from each of the centers. Transmission to the control center 140.

Accordingly, the central control center 140 calculates the position coordinates of the receiver 120 through the position tracking signal and the reception time information. This is the same result as calculating the position coordinates of the second mobile communication terminal 121. Here, the method for calculating the distance between each of the base stations 131, 132, and 133 and the second mobile communication terminal 121 preferably uses a TOA method. The TOA method calculates the position of the second mobile communication terminal 121 using propagation times T1, T2, and T3 from the second mobile communication terminal 121 to three base stations 132, 133, and 134. In detail, when a circle is drawn based on the propagation times T1, T2, and T3 from the second mobile communication terminal 121 to each of the base stations 132, 133, and 134 in the triangulation method, the intersection points are moved to the second. It becomes the position of the communication terminal 121.

Looking at the location tracking method of the second mobile communication terminal 121 according to the present embodiment as follows.

First, since the transmission time T ′ of the second mobile communication terminal 121 is included in the location tracking signal, only the reception times Tn, n = 1, 2, and 3 at each base station need to be measured. The radius value R1 of the first base station 131 calculated using the reception time information T1 of the first base station 131 may be expressed by Equation 1 below.

R1 = (T1-T ') * 300,000 Km / sec (where (T1-T') is the propagation time and 300,000 Km / sec is the speed of light)

In this manner, the reception times T2 and T3 received by the remaining two second and third base stations 132 and 133 and the transmission time T ′ transmitted from the second mobile communication terminal 121 are used. The radius values R2 and R3 of the second and third base stations 132 and 133 may be calculated.

Latitude information and longitude information of the first base station 131 'X1, Y1', latitude information and longitude information of the second base station 132 'X2, Y2', latitude information and longitude information of the third base station 133 Is assumed to be 'X3, Y3', and when the latitude and longitude information of the second mobile communication terminal 121 is 'X, Y', a distance between the second mobile communication terminal 121 and each base station is given. It can be obtained by a quadratic equation such as [Equation 2].

(X-X1) ² + (Y-Y1) ² = R1 ²

(X-X2) ² + (Y-Y2) ² = R2 ²

(X-X3) ² + (Y-Y3) ² = R3 ²

In Equation 2, since there are two unknowns and three equations, the position coordinates of the second mobile communication terminal 121, that is, latitude and longitude information, 'X, Y' are methods for solving quadratic equations. It can be expressed as shown in [Equation 3] using.

X = [{(R1 ² -R2 ² )-(X1 ² -X2 ² )-(Y1 ² -Y2 ² )} × (Y1 ² -Y2 ² )-{(R2 ² -R3 ² )-(X2 ^2- X3 ² )-(Y2 ² -Y3 ² )} × (Y1-Y2)] / [2 {(X1-X2) × (Y2-Y3)-(X2-X3) × (Y1-Y2)}]

Y = [{(R1 ² -R2 ² )-(X1 ² -X2 ² )-(Y1 ² -Y2 ² )} × (Y1 ² -Y2 ² )-{(R2 ² -R3 ² )-(X2 ^2- X3 ² )-(Y2 ² -Y3 ² )} × (X1-X2)] / [2 {(X1-X2) × (Y2-Y3)-(X2-X3) × (Y1-Y2)}]

That is, if only the radius values R1, R2 and R3 of the three base stations and the transmission time from the second mobile communication terminal 121 and the reception times T1, T2 and T3 of each base station are known, the second mobile communication is known. The position coordinates may be obtained by calculating the position of the terminal 121. This is also the position coordinate of the receiver 120.

Thereafter, the location information of the caller 110 according to the position coordinates of the receiver 120 is transmitted to the receiver 120 (S50). As a method of transmitting the location information of the caller 110 according to its position coordinates to the receiver 120, converting the place of the caller 110 transmitted as text into the position coordinates, and the position of the caller 110 It is preferable to include the step of acquiring map information between the receiver 120 and the sender 110 based on the coordinates and the position coordinates of the receiver 120, and transmitting the map information to the receiver 120. In this case, the location information of the caller may be stored in the map DB server 145 built in the central control center 140 or may be provided from an external center in which a geographic information system (GIS) is built. In addition, as a method of transmitting the location information of the caller 110 to the receiver 120, for example, the direction information and distance between the caller 110 and the caller 110 included in the numerical map and the required time calculated based on them. It is preferable to transmit the message in the form of a flat map prepared based on map information, and the location of the receiver 120 and the sender 110 is preferably displayed on the flat map.

Thus, the receiver 120 receives the location information of the caller 110 according to its location (S60). That is, the receiver 120 receives the location information of the caller 110 according to its location through the second mobile communication terminal 121 and stores it in the storage unit 124, and then displays the display unit through the second control unit 123. By outputting to 126, the location information of the caller 110 is served.

As described above, when the caller's location information service request is made through the mobile communication terminal, the present invention selects three base stations close to the receiver through the schematic location information of the receiver provided by the sender, and then selects each base station from the receiver. The location tracking signal transmitted to the base stations is received to track the location of the receiver's mobile communication terminal. Accordingly, the location information between the receiver and the sender according to the location of the receiver is transmitted to the receiver's mobile communication terminal, thereby serving the receiver's location information. In this case, as a method of tracking the location of the receiver's mobile communication terminal, it is preferable to use a time of arrival (TOA) method.

Therefore, according to the present invention, both the sender and the receiver can service their own location information to the receiver without having to mount a GPS receiver in a state where the caller does not know the location of the moving receiver, and the location regardless of the receiver's reception environment. Information can be provided.

Claims (6)

Location information service method through a mobile communication terminal comprising the following steps: a) a caller transmitting a location notification request signal including a caller's telephone number and an outline location information, and a caller's unique ID and location to a central control center using a mobile communication terminal; b) at the central control center, selecting three base stations in proximity to the receiver through the coarse location information of the receiver, and transmitting a position information disclosure acceptance message to the receiver's mobile communication terminal; c) accepting the location information by the receiver and transmitting a location tracking signal including the unique ID and transmission time information of the receiver; d) receiving the position tracking signal through the selected base stations at the central control center and calculating position coordinates of the receiver using a time of arrival (TOA) method as in the following equation; X = [{(R1 ² -R2 ² )-(X1 ² -X2 ² )-(Y1 ² -Y2 ² )} × (Y1 ² -Y2 ² )-{(R2 ² -R3 ² )-(X2 ^2- X3 ² )-(Y2 ² -Y3 ² )} × (Y1-Y2)] / [2 {(X1-X2) × (Y2-Y3)-(X2-X3) × (Y1-Y2)}] Y = [{(R1 ² -R2 ² )-(X1 ² -X2 ² )-(Y1 ² -Y2 ² )} × (Y1 ² -Y2 ² )-{(R2 ² -R3 ² )-(X2 ^2- X3 ² )-(Y2 ² -Y3 ² )} × (X1-X2)] / [2 {(X1-X2) × (Y2-Y3)-(X2-X3) × (Y1-Y2)}] Rn = (Tn-T ') x 300,000 Km / sec, n = 1,2,3 (Where X is the latitude value of the receiver, Y is the longitude value of the receiver, Xn (n = 1,2,3) is the latitude value of base station n (n = 1,2,3), Yn (n = 1,2) , 3) is the longitude value of base station n (n = 1,2,3), Rn (n = 1,2,3) is the distance between base station n (n = 1,2,3) and the receiver, and , T 'is the time when the location tracking signal is transmitted from the mobile communication terminal of the receiver, Tn (n = 1, 2, 3) is the time when the location tracking signal is received from the base station n (n = 1, 2, 3) being.) e) transmitting, by the central control center, location information of the caller according to the location coordinates of the receiver to a mobile communication terminal of the receiver; And f) the recipient receiving the location information. The method of claim 1, wherein step a) comprises: Pressing, by the caller, a shortcut key for requesting location notification established in the mobile communication terminal; Writing the sender's unique ID and place, and the recipient's telephone number and schematic location information in text; And And transmitting the location notification request signal. The method of claim 1, wherein the step c) transmits the location tracking signal by using a shortcut key. The method of claim 1, wherein in step e), the location information of the sender according to the location coordinates of the receiver is transmitted to the receiver. Converting the caller's place into a position coordinate; Obtaining map information from the receiver to the sender based on the sender's position coordinate and the receiver's position coordinate; And And transmitting the map information to the receiver. 5. The method of claim 4, wherein the transmitting of the map information to the recipient comprises transmitting, as a message, direction information and a distance between the sender and the required time calculated from the receiver in a message. Information service method. The method of claim 4, wherein the transmitting of the map information to the receiver comprises transmitting the map information in a flat map form based on the map information.

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