Method for performing bluetooth in wireless terminal

How to perform Bluetooth communication of a mobile terminal {METHOD FOR PERFORMING BLUETOOTH IN WIRELESS TERMINAL}

1 is a view for explaining Bluetooth communication between a portable terminal and a Bluetooth headset according to an embodiment of the present invention;

2 is a block diagram of a portable terminal according to an embodiment of the present invention;

3 is a flowchart illustrating a Bluetooth performance search process in the portable terminal according to the first embodiment of the present invention.

4 is a flowchart illustrating a Bluetooth performance search process in a portable terminal according to a second embodiment of the present invention.

5 is a flowchart illustrating a process of performing Bluetooth communication in a portable terminal according to an embodiment of the present invention.

<backgroundart><p>The present invention relates to a method of performing Bluetooth communication in a portable terminal, and more particularly, to a method of performing Bluetooth communication in a portable terminal capable of performing Bluetooth communication in an optimal direction with high received signal strength. </p><p>In general, a Bluetooth antenna mounted to perform Bluetooth communication in a portable terminal is positioned and mounted at an edge of the portable terminal. </p><p>Due to the structure (LCD, shield can, mechanism, etc.) of the portable terminal, the actual antenna gain is not uniform, and has different gains in each direction in which the portable terminal is positioned. </p><p>This has a deviation in the antenna gain depending on whether the folder of the portable terminal is opened or closed, or the direction in which the portable terminal and the Bluetooth headset for performing Bluetooth communication are located. </p><p>As a result, since the Bluetooth antenna has a small size due to the structure of the portable terminal and is located at the boundary of the portable terminal, there is a problem in that the actual radioactivity has a large variation in antenna gain depending on the direction.</p></backgroundart><abstractproblem><p>Accordingly, an object of the present invention is to provide a method for performing Bluetooth communication in a portable terminal capable of performing Bluetooth communication in an optimal direction having a high received signal strength. </p><p>Another object of the present invention is to provide a method for performing Bluetooth communication in a portable terminal that maximizes Bluetooth performance by allowing the user to optimize the function by analyzing the unique characteristics of each portable terminal. </p><p>In order to achieve the above object, a method for performing Bluetooth communication in a portable terminal is a process of displaying a direction in which the portable terminal should be located based on a Bluetooth device that will communicate with the portable terminal in a Bluetooth performance search mode of the portable terminal class; measuring and storing the received signal strength of the portable terminal positioned in the indicated direction by the user; storing the received signal strength corresponding to each direction in which the portable terminal is located while repeating the above steps; and displaying the received signal strength corresponding to each direction in which the portable terminal is positioned.</p><p>In addition, a method for performing Bluetooth communication in a portable terminal for achieving the above object includes: detecting whether a portable terminal is rotated based on a Bluetooth device to communicate with the portable terminal in a Bluetooth performance search mode of the portable terminal; when the rotation of the portable terminal is sensed, measuring and storing the received signal strength in each direction according to the rotation of the portable terminal; and displaying the received signal strength corresponding to each direction according to the rotation of the portable terminal.</p><p>In addition, there is provided a method for performing Bluetooth communication in a portable terminal for achieving the above object, comprising: measuring a received signal strength with a Bluetooth device communicating with the portable terminal in a Bluetooth communication execution mode of the portable terminal; determining whether the measured received signal strength is smaller than the lowest received signal strength among previously stored received signal strengths; and when the measured received signal strength is less than the lowest received signal strength among the previously stored received signal strengths, a step of notifying that the received signal strength is low.</p></abstractproblem>

<p>DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that like components in the drawings are denoted by like numerals wherever possible.</p><p>1 is a diagram for explaining Bluetooth communication between a portable terminal and a Bluetooth headset according to an embodiment of the present invention.</p><p>Referring to FIG. 1 , the portable terminal 100 includes a Bluetooth communication module, and performs Bluetooth communication with the Bluetooth device 200 through the Bluetooth module. The portable terminal 100 searches for an optimal direction having a high received signal strength in performing Bluetooth communication with the Bluetooth device 200, and is positioned in the optimal direction to perform Bluetooth communication with the Bluetooth device 200 do.</p><p>The Bluetooth device 200 includes a Bluetooth module, and performs Bluetooth communication with the portable terminal 100 positioned in an optimal direction having a high received signal strength through the Bluetooth module. In an embodiment of the present invention, it is assumed that the Bluetooth device is a Bluetooth headset.</p><p>FIG. 2 is a diagram showing the configuration of the portable terminal 100 of FIG. 1 . </p><p>Referring to FIG. 2 , the RF unit 123 performs a wireless communication function of the portable terminal. The RF unit 123 includes an RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and an RF receiver for low-noise amplifying and down-converting a received signal. Also, the RF receiver of the RF unit 123 may measure Receiving Signal Strength (RSSI) for a received signal. In addition, the RF receiver of the RF unit 123 may measure the received signal strength of a signal received through the Bluetooth antenna in the Bluetooth performance search mode under the control of the controller 110 .</p><p>The modem (MODEM) 120 includes a transmitter for encoding and modulating the transmitted signal and a receiver for demodulating and decoding the received signal.</p><p>The audio processing unit 125 may constitute a codec, and the codec includes a data codec for processing packet data and the like and an audio codec for processing an audio signal such as voice. The audio processing unit 125 converts the digital audio signal received from the modem 120 into an analog signal through the audio codec and reproduces it, or converts the analog audio signal generated and transmitted from the microphone into a digital audio signal through the audio codec. , and transmits to the modem 120 . The codec may be provided separately or may be included in the controller 110 .</p><p>The memory 130 may be composed of a program memory and data memories. The program memory may store programs for controlling general operations of the portable terminal and programs controlling to perform Bluetooth communication in an optimal direction having a high received signal strength according to an embodiment of the present invention. In addition, the data memory performs a function of temporarily storing data generated while executing the programs. In addition, the memory 130 includes a Bluetooth performance table in which each direction of the portable terminal 100 with respect to the Bluetooth headset 200 and received signal strength corresponding thereto are stored according to an embodiment of the present invention.</p><p>The control unit 110 performs a function of controlling the overall operation of the portable terminal. Also, the controller 110 may include the modem 120 and a codec.</p><p>In addition, according to an embodiment of the present invention, the control unit 110 records the received signal strength corresponding to each direction in which the portable terminal 100 is positioned with respect to the Bluetooth headset 200 in the Bluetooth performance search mode in the Bluetooth performance table according to an embodiment of the present invention. control to save. </p><p>In addition, the control unit 110 controls to display each direction stored in the Bluetooth performance table and the received signal strength corresponding thereto on the display unit 160 according to an embodiment of the present invention, wherein the direction is controlled to be displayed in a 3D graph can do. </p><p>Also, according to an embodiment of the present invention, the control unit 110 controls the portable terminal to be positioned in a direction having the highest received signal strength among various directions stored in the Bluetooth performance table to perform Bluetooth communication.</p><p>The Bluetooth communication module 170 includes a Bluetooth antenna, an RF unit, and a baseband processing unit. The RF unit performs a function of processing a signal transmitted and received through the Bluetooth antenna. The RF unit includes an RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and an RF receiver for amplifying a received signal to low noise and down-converting the frequency. The RF receiver of the RF unit may measure Receiving Signal Strength (RSSI) for a signal received through the Bluetooth antenna. The baseband processing unit converts various host control interface data packets into packet formats, wirelessly transmits them through the RF transmitter, and converts data packets received through the RF receiver into host control interface packets.</p><p>In an embodiment of the present invention, the received signal strength is stored in the Bluetooth performance table together with the corresponding direction, and each direction stored in the Bluetooth performance table and the received signal strength corresponding thereto may be displayed on the display unit 160 . have.</p><p>The sensor unit 180 detects a direction signal at which the portable terminal is located, and outputs the sensed direction signal to the controller 110 . In an embodiment of the present invention, it is assumed that the sensor unit 180 is a geomagnetic sensor capable of detecting the three-axis (x, y, Z) directions.</p><p>The display unit 160 displays user data output from the control unit 110 . Here, the display unit 160 may use an LCD, and in this case, the display unit 160 may include an LCD controller, a memory capable of storing image data, and an LCD display device. Here, when the LCD is implemented in a touch screen method, it may operate as an input unit. The display unit 160 may display the received signal strength corresponding to each direction in which the portable terminal stored in the Bluetooth performance table is located according to an embodiment of the present invention, wherein each direction in which the portable terminal is located is a 3D graph can be displayed as</p><p>The key input unit 127 includes keys for inputting numeric and character information and function keys for setting various functions.</p><p>A Bluetooth performance search process for finding an optimal direction for maximizing the performance of Bluetooth communication with the Bluetooth headset 200 in the portable terminal 100 as described above will be described in detail with reference to FIGS. 3 and 4 .</p><p>3 is a flowchart illustrating a Bluetooth performance search process in the portable terminal according to the first embodiment of the present invention, and relates to a method of measuring the received signal strength in the direction designated by the portable terminal by positioning the portable terminal in the direction specified by the portable terminal. . In the first embodiment of the present invention, measuring the received signal strength in the Bluetooth communication module will be described as an example.</p><p>Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 . </p><p>Referring to FIG. 3 , when the Bluetooth performance search is selected in the portable terminal 100, the controller 110 detects this in step 301 and the Bluetooth headset to perform Bluetooth communication with the portable terminal 100 ( 200) proceeds to step 302 to set the reference direction. In step 302, the reference direction may be the current position between the portable terminal 100 and the Bluetooth headset 200, or a position between the portable terminal 100 and the Bluetooth headset 200 by the user. can be set.</p><p>When the reference direction is set in step 302 , the controller 110 informs the display unit 160 of the direction in which the portable terminal 100 should be positioned, and proceeds to step 303 . In step 303, the control unit 110 determines the direction in which the predetermined position is changed from the reference direction, for example, the direction in which the mobile terminal should be located in a 3D graph along with a message saying "Please position it in the 8 oclock direction". You can control the display. 100-1 to 100-4 of FIG. 1 show portable terminals displayed as 3D graphs for informing the user of the direction in which the portable terminal should be located in step 303.</p><p>When the mobile terminal 100 is positioned to correspond to the direction notified in step 303 by the user, the controller 110 controls the mobile terminal 100 through the direction signal output from the sensor unit 180 in step 304. , and receives the received signal strength measured by the RF unit of the Bluetooth communication module 170 in step 305 .</p><p>In step 306, the control unit 110 controls to store the received signal strength measured by the RF unit of the Bluetooth communication module 170 in the Bluetooth performance table together with the direction in which the portable terminal 100 is currently located. .</p><p>In the Bluetooth performance search mode, if the types of directions in which the portable terminal 100 should be located are not all displayed, the control unit 110 detects this in steps 307 and 308 and selects the next direction in which the portable terminal should be located. function to notify.</p><p>While repeating steps 304 through 308, the controller controls each direction in which the portable terminal 100 is located and each received signal strength measured in the directions to be stored in the Bluetooth performance table.</p><p>When the Bluetooth performance display is selected after the Bluetooth performance search mode is terminated, the controller 110 detects this in step 307 and switches the portable terminal to the Bluetooth performance display mode.</p><p>In the Bluetooth performance display mode, the control unit 110 displays the directions in which the portable terminal 100 stored in the Bluetooth performance table is located and the received signal strengths measured in the directions to the display unit 160. In step 309, the display is controlled.</p><p>In step 309, the control unit 110 may display each direction in which the portable terminal 100 is located in a 3D graph, or may display only a direction having the highest received signal strength. </p><p>When the portable terminal 100 is positioned in the direction in which the received signal strength is the highest among the directions displayed in the Bluetooth performance display mode and the respective received signal strengths corresponding thereto, the control unit 110 controls the sensor unit. It can be controlled to detect this through the direction signal output from 180 and automatically switch the portable terminal 100 to a Bluetooth communication execution mode capable of performing Bluetooth communication with the Bluetooth headset 200 . </p><p>4 is a flowchart illustrating a Bluetooth performance search process in a portable terminal according to a second embodiment of the present invention, and relates to a method of measuring a received signal strength in a direction located by a user. In the second embodiment of the present invention, measuring the received signal strength in the Bluetooth communication module will be described as an example.</p><p>Hereinafter, a second embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 . </p><p>Referring to FIG. 4 , when the Bluetooth performance search is selected in the portable terminal 100, the control unit 110 detects this in step 401 and the Bluetooth headset to perform Bluetooth communication with the portable terminal 100 ( 200) and proceeds to step 402 to set the reference direction. In step 402, the reference direction may be the current location between the portable terminal 100 and the Bluetooth headset 200, or a location between the portable terminal 100 and the Bluetooth headset 200 by the user. can be set.</p><p>When the reference direction is set in step 402, the control unit 110 controls the display unit 160 to display a message to rotate the portable terminal 100 by 360 degrees around the Bluetooth headset 200. do. </p><p>Alternatively, without going through the reference direction setting process of step 402, the control unit 110 displays a message to rotate the portable terminal 100 by 360 degrees around the Bluetooth headset 200 on the display unit 160. can be controlled </p><p>When the portable terminal 100 is rotated 360 degrees around the Bluetooth headset 200 within a predetermined time, the controller 110 detects this in step 403 and the portable terminal 100 is rotated while the portable terminal 100 is rotated. In step 404, each of the directions in which the 100 is located and the respective received signal strengths measured in the directions are measured. </p><p>In step 404, the control unit 110 detects directions in which the portable terminal 100 is located through a direction signal output from the sensor unit 180 in units of a predetermined position or in units of a predetermined time. The control unit 110 receives the received signal strength measured by the RF unit of the Bluetooth communication module 170 whenever the direction in which the portable terminal 100 is positioned is sensed.</p><p>In step 405, the control unit 110 controls the received signal strengths measured by the RF unit of the Bluetooth communication module 170 and respective directions corresponding thereto to be stored in the Bluetooth performance table.</p><p>When the Bluetooth performance display is selected after the Bluetooth performance search mode is terminated, the controller 110 detects this in step 406 and switches the portable terminal to the Bluetooth performance display mode.</p><p>In the Bluetooth performance display mode, the control unit 110 controls to display on the display unit 160 each direction in which the portable terminal 100 stored in the Bluetooth performance table is located and the received signal strength measured in the direction. proceed step by step.</p><p>In step 407, the control unit 110 may display each direction in which the portable terminal 100 is located in a 3D graph, or may display only the direction in which the received signal strength is the highest. </p><p>When the portable terminal 100 is positioned in the direction in which the received signal strength is the highest among the directions displayed in the Bluetooth performance display mode and the respective received signal strengths corresponding thereto, the control unit 110 controls the sensor unit. It can be controlled to detect this through the direction signal output from 180 and automatically switch the portable terminal 100 to a Bluetooth communication execution mode capable of performing Bluetooth communication with the Bluetooth headset 200 . </p><p>A process of performing Bluetooth communication after the Bluetooth performance search function between the portable terminal 100 and the Bluetooth headset 200 is terminated with reference to FIGS. 3 and 4 will be described in detail with reference to FIG. 5 . </p><p>5 is a flowchart illustrating a process of performing Bluetooth communication in a portable terminal according to an embodiment of the present invention.</p><p>Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 . </p><p>Referring to FIG. 5 , in the Bluetooth communication execution mode in step 501 in which the portable terminal 100 and the Bluetooth headset 200 are performing Bluetooth communication, the control unit 110 measures the received signal strength at regular intervals. Proceed to step 502.</p><p>When the received signal strength is measured in step 502, the controller 110 detects it and searches the received signal strength stored in the Bluetooth performance table. If the measured received signal strength is lower than the lowest received signal strength among the received signal strengths stored in the Bluetooth performance table, the control unit 110 detects it in step 503 and proceeds to step 504 informing that the current received signal strength is low. do. In the embodiment of the present invention, the function of notifying that the current received signal strength is low only when the received signal strength measured at regular intervals is lower than the lowest received signal strength among the received signal strengths stored in the Bluetooth performance table is described as an example However, according to the user's setting, when the received signal strength measured at each predetermined period is lower than the highest received signal strength among the received signal strengths stored in the Bluetooth performance table, this may be notified.</p><p>In step 504, the low received signal strength may be notified through various functions such as messages and alarms, and the Bluetooth headset 200 as well as the portable terminal 100 may notify this.</p><p>After notifying that the received signal strength is low in step 504, the control unit 110 controls to display on the display unit 160 the direction having the highest received signal strength among the received signal strengths stored in the Bluetooth performance table. proceed step by step. In step 505, the controller 110 may control the direction having the highest received signal strength to be displayed as a 3D graph.</p><p>In the above description of the present invention, specific embodiments such as a mobile terminal have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be determined by the described embodiments, but should be determined by the claims and equivalents of the claims.</p>

<p>That is, as described above, according to the present invention, when a portable terminal performs Bluetooth communication with a corresponding Bluetooth device, Bluetooth communication can be performed in an optimal direction having a high received signal strength.</p>