KR100556837B1 - Communication control method for separable communication terminal equipment - Google Patents

Abstract

The present invention is to enable the main body and the accessory device to be connected wirelessly through the Bluetooth module in a portable communication terminal capable of transmitting and receiving image signals, such as IMT-2000. In the present invention, when the accessory of the terminal equipped with the speaker, the buzzer and the microphone is coupled to the main body, the Bluetooth module is deactivated so that a voice signal is transmitted through a wired link between the main body and the accessory. and; If the main body and the accessory are disconnected when a call is received from the other party in the standby state, a wireless link is formed by a Bluetooth module mounted on the main body and the accessory, and the bell signal and the received voice signal are transmitted through the radio link. A second process of transmitting to the buzzer and the speaker; If the main body and the accessory are separated when calling the other party in the standby state, a wireless link is formed by the Bluetooth module mounted on the main body and the accessory, and the voice signal input through the microphone is transmitted through the main body. And a third process of activating the acoustic echo algorithm to remove the echo sound when the call is made while the main body and the accessory are coupled together.

Description

COMMUNICATION CONTROL METHOD FOR SEPARABLE COMMUNICATION TERMINAL EQUIPMENT}

1 is a perspective view of a communication terminal according to the prior art.

2 is a block diagram of a detachable communication terminal to which the present invention is applied.

3A is a flowchart illustrating an interrupt processing signal when combining a main body and an accessory device of a terminal;

3B is a flowchart illustrating an interrupt processing signal for deactivation of a camera and a display unit in a terminal.

3C is a flowchart illustrating an interrupt processing signal when the main body and the accessory of the terminal are separated.

Fig. 3d is a signal flow diagram for processing when a call is placed in standby mode.

3E is a signal flow diagram for processing when placing a call in standby mode.

Fig. 3F is a signal flow diagram for processing when a call button signal is input.

3G is a signal flow diagram for processing when a call termination signal is input.

*** Description of the symbols for the main parts of the drawings ***

210: body 211: keypad

212: display unit 213: camera

214: Application Software 215: Communication Module

216,224 Bluetooth module 220

221 speaker 222 buzzer

223: microphone

The present invention relates to a technology for attaching and detaching an accessory including a speaker and a microphone to a main body in a portable communication terminal capable of transmitting and receiving image signals, such as IMT-2000. Particularly, the main body and the accessory are used as a Bluetooth module. It relates to a communication control method of a separate type communication terminal to be connected and used wirelessly through.

Conventional portable communication terminals (cellular phones) such as cellular or PCS have a voice-oriented call function, and support data service functions, so that a microphone, a speaker, and an LCD (LCD) are designed to be embedded in the main body. there was. When making a call using such a portable mobile phone, the telephone is held close to the ear and the mouth, so that the privacy of the call is guaranteed to some extent such that the voice of the other party is not well communicated to the people around.

However, IMT-2000 portable terminal, the next generation mobile communication system to be introduced in the future, will be basically provided with the function of transmitting and receiving video information as well as voice. To this end, a camera 102 for capturing a caller is installed as shown in FIG. 1, and the LCD unit 103 may be a method of displaying a counterpart's appearance or other video information.

In order to make a call in this manner, the user must place the phone in front of the user and look at the camera 102 and the LCD unit 103, unlike when using a normal phone. Of course, at this time, the other party's voice signal is output through the speaker 101, and the user's voice signal is input through the microphone 104 and then transmitted to the other party.

As described above, in the next-generation portable terminal according to the prior art, the telephone is placed on the front of the user to make a call while staring at the camera and the LCD, resulting in the following problems.

First, since the speaker is located at a certain distance from the receiver's ear, the receiver inevitably listens to the ambient noise when listening to the output voice signal of the speaker, thereby degrading reception sensitivity. Second, since the contents of the call were exposed to those around them, it was difficult to guarantee privacy. Third, there is a problem in that an acoustic echo is generated by directly receiving a voice of the other party to be received by a microphone. In addition, in addition to the above problems, there was a problem such as not accepting a request not to show their appearance to the other party during a call.

Accordingly, an object of the present invention is to attach a speaker and a microphone to the accessory device so as to be detachable mechanically with the main body, and when the main body and the accessory is mechanically separated, the communication of the detachable terminal to maintain a wireless connection through the Bluetooth module To provide a control method.

According to a first aspect of the present invention, a terminal is detachably configured into two parts: a keypad, a display unit, a main body equipped with a camera, and an accessory equipped with a microphone, a speaker, and a buzzer, and the two parts are mechanically When separated, data transmission and reception via the Bluetooth module is possible.

According to the second aspect of the present invention, when the main body of the terminal and the attached device are used in combination or separated, the user can make a call in a desired manner without pressing a specific button.

According to a third aspect of the present invention, when the call is in the standby mode in a state in which the main body of the terminal and the accessory device are separated, an alarming signal is output through the buzzer of the accessory device when a call is received.

According to a fourth aspect of the present invention, an acoustic echo cancellation algorithm built into the terminal selectively operates only when a call is made while the main body and the accessory are combined.
In the communication control method of a separate type communication terminal according to the present invention, if an accessory device of a terminal equipped with a speaker, a buzzer and a microphone is combined with a main body, the Bluetooth module is deactivated and voice is transmitted through a wired link between the main body and the accessory device. A first step of transmitting a signal; If the main body and the accessory are disconnected when a call is received from the other party in the standby state, a wireless link is formed by a Bluetooth module mounted on the main body and the accessory, and the bell signal and the received voice signal are transmitted through the radio link. A second process of transmitting to the buzzer and the speaker; If the main body and the accessory are separated when calling the other party in the standby state, a wireless link is formed by the Bluetooth module mounted on the main body and the accessory, and the voice signal input through the microphone is transmitted through the main body. And a third step of removing the echo sound by activating the acoustic echo algorithm.
2 is a block diagram of a detachable communication terminal to which a communication control method according to the present invention is applied, as shown therein, a keypad 211 for inputting a user's control command, and a communication module to be described later after being transmitted from a counterpart terminal. A display unit 212 displaying an image received through 215, a camera 213 for capturing the user's appearance, and the like, and a key signal input through the keypad 211 are recognized or authenticated. The application software 214 for performing such operations, the video signal and the audio signal input through the camera 213 and the microphone 223 are compressed, formatted to meet the transmission standard, and transmitted to the base station, and the base station When the communication module 215 for restoring the video signal received from the counterpart terminal through the communication unit 215 and the accessory device 220 to be described later are separated from the main body 210, the accessory is attached thereto. Value of the Bluetooth module 224 and wireless voice communication unit 210 configured with the Bluetooth module 216 to perform the mounting 220, and; In the state in which the main body 210 and the accessory device 220 are coupled, the voice signal and the warning signal input from the communication module 215 are output, and in the separated state, the voice signal and the warning signal input through the Bluetooth module 224. Outputs the user's voice signal to the communication module 215 or the Bluetooth module 224 according to the detachment state of the speaker 221 and the buzzer 222 and the main body 210 and the accessory device 220 outputting a signal. The microphone 223 and the Bluetooth module 216 perform wireless voice communication with each other to output the received voice signal and warning signal to the speaker 221 and the buzzer 222, and is input through the microphone 223. And an accessory device 220 consisting of a Bluetooth module 224 for transmitting a voice signal of the main body 210; As the accessory device 220 is attached to or detached from the main body 210, the Bluetooth module 216 and 224 are controlled in an activation state or a deactivation state, and the speaker 221, the buzzer 222, and the microphone are controlled. Referring to Figures 2 and 3 attached to the operation of the present invention configured as a control unit for switching the connection line of the wire 223 to a wired or wireless as follows.

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In a state in which the main body 210 of the terminal and the accessory device 220 are coupled to each other, the user's appearance during the call is photographed through the camera 213, and a voice signal is input through the microphone 223. The video and audio signals thus obtained are compressed by the source codec 215A, and then formatted by the base band unit 215B to correspond to a predetermined transmission format. It is sent out to the side.

In addition, the signal transmitted from the counterpart terminal through the base station is processed in the opposite direction to the above process through the transmitting and receiving end 215C, the baseband unit 215B and the source codec 215A so that the original video and audio signals Is restored. The restored video signal is displayed on the display unit 212, and the audio signal is output to the speaker 221 side.

For reference, a protocol stack 215D is for forming a radio link with a base station based on the RRC of an MPEG layer 3 in association with the baseband unit 215B.

On the other hand, when the accessory device 220 is separated from the main body 210, the Bluetooth module 216, 224 activating the voice signal of the speaker 221, the buzzer 222 and the microphone 223 is wireless It is transmitted through a link, and controls the driving of the display unit 212, the camera 213, the video codec, etc. according to the user's request. The interrupt processing thereof will be described in detail as follows.

When the main body 210 of the terminal and the accessory device 220 are coupled, the Bluetooth modules 216 and 224 between the two devices are basically in a deactivation state (SA1). The speaker 221 and the buzzer 222 in the 220 are directly connected to the main body 210 and controlled by an MMI (MMI) control module, and a signal from the main body 210 is transmitted through a wire. (SA2)

When making or receiving a call in the call waiting state, the default state of the display unit 212 and the camera 213 maintains an activation state. Therefore, the user can make a video call with the terminal on the front side. At this time, the echo cancellation algorithm is set to the operation mode to remove the echo sound.

However, if the user does not want to make a video call and wants to make a call in the ear, such as when using a general terminal, when the user presses a specific key provided on the keypad 211, the display unit of the IMT-2000 MODULE 215 displays the display unit. Deactivation of the 212, the camera 213, and the video codec switches to a mode that supports only voice calls. In this case, the echo cancellation algorithm is set to an operation mode to remove echo sound. (SB1-SB4 )

When the main body 210 and the accessory 220 of the terminal are separated, the serial line between the speaker 221, the buzzer 222 and the microphone 223 and the communication module 215 of the accessory 220 is connected. The state is released, and the Bluetooth module 224 of the accessory device 220 is activated (SC1, SC2).

When a call is received from the other party in the call waiting state, if the main body 210 and the accessory device 220 of the terminal are separated, the Bluetooth module 216 of the main body 210 wakes up in the deactivation state. A wireless link between the two Bluetooth modules 216 and 220 is established by switching to the wake-up state, and a warning signal is transmitted to the buzzer 222 of the accessory device 220 through the link (SD1-SD4). . Thus, the user can hear the buzzer and recognize that the call is received.

However, when the main body 210 and the accessory 220 of the terminal are coupled to each other, the warning signal is transmitted to the buzzer 222 through the serial line.

On the other hand, when making a call to the other party in the call waiting state, if the main body 210 and the accessory device 220 of the terminal is separated, the Bluetooth module 216 of the main body 210 wakes up in the deactivation state After being switched to the activation state, the Bluetooth module 224 of the accessory 220 is connected to the wireless link, so that the user's voice signal input through the microphone 223 is transmitted to the main body 210 through the wireless link. (SE1-SE3)

Similarly, the voice signal of the other party received and processed by the communication module 215 is output to the speaker 221 through the Bluetooth wireless link. Therefore, the user can make a voice call with the other party without any switch operation while the main body 210 and the accessory device 220 of the terminal are separated.

When the main body 210 and the accessory device 220 are separated as described above, the default value of the display unit 212 and the camera 213 may be activated or the user may selectively change this mode. That is, if you do not want to show yourself to the other party during a call, you can press the specific button to change the camera 213 to the deactivation state.

3F and 3G show an example of interrupt processing by the call button and the call end button. That is, when the call button is pressed on the keypad 211 by the user, the camera 213, the video and audio codec are activated. (SF1)

In addition, when the call end button is pressed, the main body 210 and the accessory 220 is checked to see if it is in a separated state, if it is in a combined state, the camera 213, the video and audio codecs are deactivated as they are, and in a separated state. In this case, the two Bluetooth modules 216 and 224 are deactivated to release the radio link and then deactivate the camera 213 and the video and audio codecs. (SG1-SG4)

For reference, the attachment or detachment of the accessory device 220 to the main body 210 may be easily detected by the controller. For example, based on the potential change of the serial line connecting the speaker 221, the buzzer 222, and the microphone 223, it may be detected that the accessory device 220 is attached to or detached from the main body 210. .

As described in detail above, the present invention, by attaching a speaker and a microphone to the accessory device of the communication terminal to be detachable mechanically and the main body and the accessory when the mechanical signal is separated from the wireless signal by the wireless link by the Bluetooth module By transmitting, the reception sensitivity of the voice signal can be prevented from being lowered and the privacy of the user can be protected.

In addition, since only the accessory can be carried separately, there is an effect that the activity is free even in a call state and the call can be easily recognized.

Claims (6)

delete delete A first process of bringing the Bluetooth module into a deactivation state so that a voice signal is transmitted through a wired link between the main body and the accessory when the accessory of the terminal equipped with the speaker, the buzzer and the microphone is coupled to the main body; If the main body and the accessory are disconnected when a call is received from the other party in the standby state, a wireless link is formed by a Bluetooth module mounted on the main body and the accessory, and the bell signal and the received voice signal are transmitted through the radio link. A second process of transmitting to the buzzer and the speaker; If the main body and the accessory are separated when calling the other party in the standby state, a wireless link is formed by the Bluetooth module mounted on the main body and the accessory, and the voice signal input through the microphone is transmitted through the main body. And a third process of activating the acoustic echo algorithm to remove echo when the call is made while the main body and the accessory are coupled together. 4. The method of claim 3, wherein the wired link and the wireless link are automatically selected as the accessory is attached to or detached from the main body. 4. The method of claim 3, wherein the second process comprises switching the camera to a deactivation state according to a user's request. delete

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