KR101233173B1 - Method of Searching Position of Another Mobile Communication Terminal in Mobile Communication Terminal - Google Patents

Abstract

The present invention relates to a location search method of another mobile communication terminal in the mobile communication terminal. The present invention provides a method of searching for a location of another mobile communication terminal (hereinafter referred to as a 'second terminal') in a mobile communication terminal (hereinafter referred to as a 'first terminal'), wherein the location information of the first terminal (hereinafter referred to as 'second terminal') Acquiring 'first location information'; Receiving location information of the second terminal (hereinafter referred to as 'second location information') from the outside; And obtaining location information of the second terminal relative to the first terminal using the first location information and the second location information. to provide. Therefore, according to the present invention, there is an advantage in that the position of another mobile communication terminal can be displayed on the camera preview screen of the mobile communication terminal.

Mobile terminal, camera, location search

Description

{Method of Searching Position of Another Mobile Communication Terminal in Mobile Communication Terminal}

1 is a block diagram of a mobile communication terminal to which the present invention is applied.

2 is a flowchart of a method for retrieving a location of another mobile communication terminal in a mobile communication terminal according to an embodiment of the present invention.

3 is a flowchart of a method for retrieving a location of another mobile communication terminal in a mobile communication terminal according to another embodiment of the present invention.

4 is a diagram illustrating the function of a gyro sensor.

5 is a diagram for describing a method of obtaining relative position information of a second terminal.

6 is a conceptual diagram of a camera preview screen including a second terminal.

7 illustrates an example of displaying a second terminal on a camera preview screen according to the present invention;

The present invention relates to a mobile communication terminal, and more particularly, to another mobile communication terminal in a mobile communication terminal capable of displaying a location of another mobile communication terminal on a screen of a mobile communication terminal, for example, a camera preview screen. It relates to a location search method.

According to the related art, a service for searching for a location of another mobile communication terminal in one mobile communication terminal has been provided, such as a 'friend finder' function provided by a mobile communication provider. However, in the conventional method, the mobile communication signal through a mobile communication network is detected at a long distance and then displayed on a map embedded in the terminal, thereby providing an accurate location to the user. There is a problem. In addition, there is a problem that a map must be embedded in the terminal or a map must be downloaded from the network.

In addition, a camera function is basically provided in a terminal on the market, and a method of simultaneously providing fun and convenience to a user by combining the camera function and a search function of another mobile communication terminal has been demanded.

Therefore, according to the related art, not only the location of another mobile communication terminal cannot be displayed on the screen at a short distance, but also there is a method itself that can display the location of another mobile communication terminal in connection with a camera function such as a camera preview screen. Did not do it.

The present invention solves the above problems and has been proposed in accordance with the recent trend, the present invention, by using a wireless positioning system such as GPS to display the position of the other mobile communication terminal in the mobile communication terminal in various forms on the screen It is an object of the present invention to provide a method for retrieving a location of another mobile communication terminal.

Another object of the present invention is to provide a method for retrieving a location of another mobile communication terminal in a mobile communication terminal capable of retrieving a location of another mobile communication terminal through a camera preview screen.

Still another object of the present invention is to provide a method for retrieving a location of another mobile communication terminal in a mobile communication terminal that can search for a location of another mobile communication terminal on a screen during a call.

As an aspect of the present invention for achieving the above object, in the mobile communication terminal according to the present invention, a method for retrieving a location of another mobile communication terminal is different from a mobile communication terminal (hereinafter referred to as a 'first terminal'). What is claimed is: 1. A method of searching for a location of a second terminal, the method comprising: obtaining location information of a first terminal (hereinafter, referred to as 'first location information'); Receiving location information of the second terminal (hereinafter referred to as 'second location information') from the outside; And obtaining relative position information of the second terminal with respect to the first terminal using the first position information and the second position information.

As another aspect of the present invention for achieving the above object, a method for retrieving a location of another mobile communication terminal in the mobile communication terminal according to the present invention is different from the mobile communication terminal (hereinafter referred to as 'first terminal') A method for searching for a location of a second terminal (hereinafter referred to as 'second terminal'), the method comprising: connecting a call between the first terminal and the second terminal; Entering a camera preview screen updated as the direction of the camera provided in the first terminal changes; Obtaining location information of the first terminal (hereinafter referred to as 'first location information') and location information of the second terminal (hereinafter referred to as 'second location information'); Obtaining direction information (hereinafter, referred to as "camera direction information") to which the camera is currently directed; And displaying the location of the second terminal on the camera preview screen by using the first location information, the second location information, and the camera direction information.

The above objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like numbers refer to like elements throughout. In addition, when it is determined that the detailed description of the known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a mobile communication terminal to which the present invention is applied. The mobile communication terminal illustrated in FIG. 1 includes a mobile communication module 10, a GPS receiving module 11, a direction sensor 12, an input unit 13, a control unit 14, a camera module 15, and a display unit 16. ) And a memory unit 17.

The mobile communication module 10 is a communication device for transmitting and receiving data with the mobile communication network. The GPS reception module 11 is a communication device for receiving a GPS (Global Positioning System) signal from a satellite. However, the GPS reception module 11 is for acquiring position information by the wireless positioning system, but is not necessarily limited thereto. That is, the GPS receiving module 11 may be replaced with a module that is compatible with a radio positioning system other than GPS. The direction sensor 12 is a sensor for obtaining direction information directed by the terminal (or camera), and may be implemented as a gyro sensor or a geomagnetic sensor. The input unit 13 is an input device for receiving various information or commands from a user, and may be implemented as a keypad or a touch screen. The controller 14 manages the overall operations of the mobile communication terminal. The camera module 15 is a module for capturing an external image including a lens and an image sensor. The display unit 16 is a display device for displaying the state or various information of the mobile communication terminal. The memory unit 17 stores a predetermined program for controlling the overall operation of the mobile communication terminal, and stores data input and output and various data processed when the overall operation of the mobile communication terminal is performed by the controller 14. Save it.

Hereinafter, a method of searching for the location of another mobile communication terminal in the mobile communication terminal shown in FIG. 1 will be described in detail.

For convenience of description of the present invention, the following assumptions will be made. In the mobile communication terminal (hereinafter, referred to as 'first terminal') shown in FIG. 1, a location of another mobile communication terminal (hereinafter referred to as 'second terminal') is searched for and informed to the user of the first terminal.

2 is a flowchart illustrating a method of searching for a location of another mobile communication terminal in a mobile communication terminal according to an embodiment of the present invention. Referring to Figure 2, the mobile communication terminal according to an embodiment of the present invention will be described in detail the location search method of the other mobile communication terminal as follows.

First, location information of the first terminal (hereinafter referred to as 'first location information') is obtained [S20]. The first positional information is information obtained by the radio positioning system. For example, the first location information may be obtained by using a satellite signal received through the GPS receiving module 11. Alternatively, the second location information may be included in a mobile communication base station parameter received from a mobile communication network.

Then, location information of the second terminal (hereinafter referred to as 'second location information') is received from the outside (S21). For example, in step S21, the first terminal requests the second location information from the second terminal, and the second terminal requests the second location information by a wireless positioning system (eg, GPS) according to the request. 2 acquires the location information and transmits it to the first terminal.

In addition, relative location information of the second terminal with respect to the first terminal is obtained using the first location information and the second location information [S22]. The obtained relative position information is preferably two-dimensional or three-dimensional vector information. For example, when the first position information and the second position information are three-dimensional position information obtained by GPS, the relative position information is a difference between the first position information and the second position information. That is, when the relative position information is 3D vector information, the relative position information has 3D size information and 3D direction information.

Then, the position of the second terminal is displayed on the display unit 16 of the first terminal by using the obtained relative position information [S23]. For example, when the obtained relative position information has 3D size information and 3D direction information, the 3D size and direction information is displayed on the display unit 16 to display the position of the second terminal. have.

Hereinafter, a method of searching for a location of another mobile communication terminal in the mobile communication terminal according to the present invention described with reference to FIG. 2 will be described in detail with reference to a specific embodiment. 3 is a flowchart illustrating a method of searching for a location of another mobile communication terminal in the mobile communication terminal according to another embodiment of the present invention. Referring to Figure 3, the mobile communication terminal according to another embodiment of the present invention will be described in detail the location search method of the other mobile communication terminal as follows. In the location retrieval method shown in FIG. 3, it is assumed that the first terminal and the second terminal are in a call.

That is, a call is connected between the first terminal and the second terminal [S30]. In the state where the call is connected as described above, the camera preview screen of the first terminal enters (S31). As a specific example, a 'find people' function is assigned to any one key of the keypad of the first terminal. In addition, during a call with the second terminal, pressing the key to which the 'person search' function is assigned automatically enters the camera preview screen. The camera preview screen is updated as the direction in which the camera is directed changes.

Then, location information (first location information) of the first terminal is obtained (S32), and location information (second location information) of the second terminal is obtained (S33). Steps S32 and S33 correspond to steps S20 and S21 described above. However, as described above, the step S33 may be performed by the first terminal requesting the second location information from the second terminal. For example, a method of requesting the second location information is as follows. .

The first terminal may transmit a dual tone multiple frequency (DTMF). This is a method of transmitting numbers (0 to 9) and symbols (*, #) by using a terminal button during a call. Table 1 shows a code example of DTMF.

Digit Code (Binary) Digit Code (Binary) One 0001 7 0111 2 0010 8 1000 3 0011 9 1001 4 0100 0 1010 5 0101 * 1011 6 0110 # 1100

The above-described 'find people' function is assigned to any one of the codes shown in Table 1, and when a key corresponding to the code is pressed, a message for requesting the second location information is transmitted to the second terminal. This may be done at the same time as entering the aforementioned camera preview screen.

After receiving the message transmitted in this manner, the second terminal acquires its own location information (the second location information) by using a GPS or the like and transmits it to the first terminal. Here, the second terminal may transmit the second location information to the first terminal through a short message service (SMS). The SMS transmission may be performed in a multiplex mode that enables data transmission during a call.

Then, the position information of the second terminal relative to the first terminal is acquired (S34), and the direction information (hereinafter, referred to as "camera direction information") currently directed by the camera is obtained [S35]. The camera direction information is obtained using a direction sensor 12 such as a gyro sensor or a geomagnetic sensor. 4 is a diagram illustrating the function of a gyro sensor. As shown in FIG. 4A, the magnetic north N is found and the azimuth angle is determined based on which direction the gyro sensor is looking. As illustrated in FIG. 4B, the gyro sensor detects an angle at which the gyro sensor is inclined based on the earth horizontal plane.

5 is a diagram for describing a method of obtaining relative position information of a second terminal. 5 (a) shows a plane parallel to the earth's horizontal plane, and FIG. 5 (b) shows a plane perpendicular to the earth's horizontal plane. An example of a method of obtaining relative position information of the second terminal with respect to the first terminal will be described with reference to FIG. 5.

The first position information acquired in step S32 includes three-dimensional coordinates consisting of (x ₁ , y ₁ , z ₁ ), and the second position information obtained in step S33 includes (x ₂ , y ₂ , It is assumed that it includes a three-dimensional coordinate consisting of z ₂ ). The x coordinate (x ₁ , x ₂ ) represents latitude, the y coordinate (y ₁ , y ₂ ) represents longitude, and the z coordinate (z ₁ , z ₂ ) represents altitude.

First, a plane parallel to the earth's horizontal plane (xy plane) is considered with reference to FIG. When the distance between the first terminal 100 and the second terminal 200 is d ₁₂ in the xy plane, d ₁₂ is obtained by Equation 1 below.

Meanwhile, an angle formed between the true north direction 20 of the earth and the direction 21 currently facing by the camera of the first terminal is θ ₁ , and the true north direction 20 of the earth and the camera of the first terminal are connected to the second terminal. Is an angle formed by the direction 22 facing the front side as θ ₂ , a direction 21 toward which the camera of the first terminal is currently directed, and a direction toward which the camera of the first terminal faces the second terminal. When the angle formed by (22) is θ ₁₂ , θ ₁₂ is obtained by the following equation (2).

Meanwhile, θ ₁ is included in the camera direction information obtained in step S35. Since the true north direction of the earth is generally obtained by adding 7 degrees to the magnetic north direction of the earth, when the direction detecting sensor 12 is a gyro sensor, an accurate θ ₁ can be obtained using the gyro sensor.

Next, referring to FIG. 5 (b), a plane perpendicular to the earth's horizontal plane (yz plane) is considered. When the distance between the first terminal 100 and the second terminal 200 is d _AB in the yz plane, d _AB is obtained by Equation 3 below.

Meanwhile, an angle formed between the earth horizontal plane 30 and the direction 31 of the camera of the first terminal that is currently directed is θ _A , and the earth horizontal plane 30 and the camera of the first terminal face the second terminal. The angle formed by the direction 32 viewed as θ _B is referred to as θ _B , and the direction 31 at which the camera of the first terminal is currently directed and the direction 32 at which the camera of the first terminal faces the second terminal in front of each other 32. If the angle formed by?) Is θ _AB , θ _AB is obtained by the following equation (4).

On the other hand, θ _A is included in the camera direction information obtained in step S35.

Then, it is determined whether the position of the second terminal is included in the camera preview screen by using the relative position information of the second terminal obtained in step S34 and the camera direction information obtained in step S35. S36]. In general, an image angle displayed on the camera preview screen is predetermined. Even in a camera that supports a zoom function, the degree of change of the image angle according to zoom-in / zoom-out is generally determined in advance.

6 is a conceptual diagram of a camera preview screen including a second terminal. 6 (a) is a view of a plane parallel to the earth's horizontal plane (xy plane), and FIG. 6 (b) is a view of a plane perpendicular to the earth's horizontal plane (yz plane). θ _xy is the angle formed by the camera orientation in the xy plane and the tip of the right (or left) side of the camera preview screen, and θ _yz is the angle formed by the camera orientation in the yz plane and the top (or bottom) edge of the camera preview screen. to be. Therefore, when Equation 5 and Equation 6 are satisfied at the same time, it is determined that the position of the second terminal is included in the camera preview screen.

For example, when θ ₁₂ of FIG. 5 (a) and θ _AB of FIG. 5 (b) are respectively 0 degrees, the second terminal is positioned at the center of the camera preview screen of the first terminal.

As a result of the determination in step S36, when the location of the second terminal is included in the camera preview screen, the location of the second terminal is displayed on the camera preview screen [S37]. 7 illustrates an example of displaying a second terminal on a camera preview screen according to the present invention. For example, the location of the second terminal may be displayed on the camera preview screen by using the identifier 40 indicating the location of the second terminal.

When the location of the second terminal is not included in the camera preview screen as a result of the determination in step S36, the direction of the camera is changed so that the location of the second terminal is included in the camera preview screen. Inform the user of the extent to which it should be done [S38]. For example, when any one of Equations 5 and 6 is not satisfied, it may be indicated in which direction the camera direction should be moved to indicate whether the position of the second terminal is displayed on the camera preview screen. have. That is, by calculating (θ ₁₂ -θ _xy ) and / or (θ _AB -θ _yz ), it is possible to know the degree to which the direction in which the camera is directed should change.

Then, as the direction of the camera moves by the user's operation [S39], the process returns to the step S36.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

In the above-described mobile communication terminal according to the present invention will be described the effect of the location search method of the other mobile communication terminal.

First, there is an effect that can display the position of the other mobile communication terminal in various forms on the screen using a wireless positioning system such as GPS.

Second, the mobile communication terminal can search for the location of the other mobile communication terminal through the camera preview screen, thereby providing new fun and convenience to the user.

Third, since the location of another mobile communication terminal can be searched through the camera preview screen, an accurate location search can be performed at a short distance.

Fourth, there is an effect that the mobile communication terminal can search the position of the other mobile communication terminal on the screen during the call.

Claims (12)

In the method of searching for the location of another mobile communication terminal (hereinafter referred to as 'second terminal') from the mobile communication terminal (hereinafter referred to as 'first terminal'), Obtaining location information (hereinafter referred to as 'first location information') of the first terminal; Receiving location information of the second terminal (hereinafter referred to as 'second location information'); Acquiring location information of the second terminal relative to the first terminal using the first location information and the second location information; Entering a camera preview screen updated as the direction of the camera provided in the first terminal changes; Obtaining direction information (hereinafter, referred to as "camera direction information") to which the camera is currently directed; And And displaying the location of the second terminal on the camera preview screen by using the obtained relative position information and the obtained camera direction information. delete delete The method of claim 1, wherein the receiving of the second location information comprises: Requesting the second location information from the second terminal; And Receiving the second location information from the second terminal; A method for searching for a location of another mobile communication terminal in a mobile communication terminal. The method of claim 1, wherein the relative position information, Location search method of a mobile communication terminal, characterized in that the two-dimensional or three-dimensional vector information. delete delete The method of claim 1, wherein the displaying of the location of the second terminal comprises: Determining whether the location of the second terminal is included in the camera preview screen by using the relative position information and the camera direction information; And If the location of the second terminal is included in the camera preview screen, displaying the location of the second terminal on the camera preview screen. The method of claim 8, wherein the displaying of the location of the second terminal comprises: If the position of the second terminal is not included in the camera preview screen, informing the user of the degree to which the direction of the camera should be changed so that the position of the second terminal is included in the camera preview screen. A method for searching for a location of another mobile communication terminal in a mobile communication terminal. The method of claim 1, wherein the camera direction information, The method of searching for location of another mobile communication terminal in a mobile communication terminal, characterized in that obtained by using the direction sensor provided in the first terminal. delete In the method of searching for the location of another mobile communication terminal (hereinafter referred to as 'second terminal') from the mobile communication terminal (hereinafter referred to as 'first terminal'), Connecting a call between the first terminal and the second terminal; Entering a camera preview screen updated as the direction of the camera provided in the first terminal changes; Obtaining location information of the first terminal (hereinafter referred to as 'first location information') and location information of the second terminal (hereinafter referred to as 'second location information'); Obtaining direction information (hereinafter, referred to as "camera direction information") to which the camera is currently directed; And Displaying the location of the second terminal on the camera preview screen using the first location information, the second location information, and the camera direction information; A method for searching for a location of another mobile communication terminal in a mobile communication terminal.

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