KR200194750Y1 - Wireless sending and receiving device for mobile communication terminal - Google Patents

Abstract

A radio transceiver for a mobile communication terminal for a hands-free function for allowing a voice signal to be communicated by a bidirectional simultaneous transmission function through a radio frequency is disclosed. This is composed of a mother station unit 200 is connected to the mobile communication terminal 100 by wire and put together in a pocket or a bag and a national unit 300 to communicate with the mother station unit 200 by a high frequency signal. The motherland unit 200 has a curl cord 210 also serves as an antenna function, the national unit 300 has a switch button 310 and earphones 320 and the antenna chain 330 for the operation at the start and end of the call. It is provided. In addition, the mother station and its own station have radio transmitter / receiver circuits to communicate with each other at radio frequency, and to propagate voice signals. Exchange the signal. It is effective in minimizing, low power consumption and two-way simultaneous transmission function so that it can be put into practical use for mobile communication terminal.

Description

WIRELESS SENDING AND RECEIVING DEVICE FOR MOBILE COMMUNICATION TERMINAL}

The present invention is a wireless transceiver for providing a handsfree function of a mobile communication terminal, and in particular, a mobile communication terminal capable of communicating a voice signal and a control signal with a bidirectional simultaneous transmission function through a radio frequency. The present invention relates to a wireless transceiver.

When carrying a mobile communication terminal is usually carried in a pocket or bag. The hands-free function is provided so that there is no inconvenience in making a call while carrying such a mobile communication terminal. A microphone integrated earphone is usually used. The microphone integrated earphones that offer hands-free functionality are wired and wireless. The wired type connects the terminal and the earphone with a wire by using a signal connection terminal provided in the main body of the mobile communication terminal, so that the user can talk like a normal telephone. However, the wired type uses a limited length of wires, which makes the call inconsistent and cumbersome to carry.

The wireless type that can solve the inconvenience caused by the use of wires is divided into infrared rays method and radio frequency method also called high frequency. Infrared method has a lot of restrictions on the place of use, such as communication is impossible when there is an obstacle between the terminal and earphone due to the communication directivity. In addition, due to the influence of the surrounding environment, such as illuminance and temperature, malfunction or call quality is also reduced. For this reason, the infrared method has been applied to vehicles only (public number 10-1999-0038575, 10-1999-0038905, 10-1999-0046346, etc.), but is not intended to allow people to talk on the street while traveling. This was difficult.

It is the radio frequency method that can overcome the disadvantages of the infrared method. However, the radio frequency method uses a relatively long antenna according to frequency, has a large power consumption, and is very disadvantageous in terms of technical difficulty and price for miniaturization. Moreover, since the radio frequency system is practically used only as a unidirectional transmission (simplex) function as seen in a general radio, there is much room for improvement for application to a mobile communication terminal.

Accordingly, an object of the present invention is to implement a hands-free function for communicating with a mobile communication terminal in a radio frequency method, using a processing mechanism of a microcomputer, small power consumption, and in particular, implemented to communicate in full duplex. The present invention provides a wireless transceiver for a mobile communication terminal.

1 is a perspective view showing a state of use of a wireless transceiver for a mobile communication terminal according to the present invention.

Figure 2 is a block diagram showing a circuit configuration of a mother station constituting a wireless transceiver for a mobile communication terminal according to the present invention.

3 is a block diagram showing a circuit configuration of a local station constituting a wireless transceiver for a mobile communication terminal according to the present invention.

4 is an operation flowchart of a mother station configuring a wireless transceiver for a mobile communication terminal according to the present invention.

5 is an operation flowchart of a local station constituting a wireless transceiver for a mobile communication terminal according to the present invention;

Explanation of symbols on the main parts of the drawings

100: mobile communication terminal 200: motherland unit

210: curl code 220: connector

230: Motherland Radio Transmitter 240: Motherland Dancer

250: mother fisherman 300: national unit

310: switch button 320: earphone

330: necklace 340: the national radio transmitter

350: National athletes 360

In order to achieve the above object, in the present invention, a connector for connecting to the voice signal input and output terminals of the mobile communication terminal, a mother station transmitting unit for modulating the voice output signal of the mobile communication terminal input through the connector to a high frequency signal to transmit to the outside; A mother station receiver which receives an external high frequency signal, detects a voice input signal therefrom, and inputs it to a mobile communication terminal through the connector, and controls the mother station transmitter and the mother station receiver based on an external high frequency signal received by the mother station receiver. It is provided with a mother station unit including a mother international language control unit for controlling the control high frequency signal to be transmitted to the outside through the transmitter, and the local station receiving unit for receiving the high frequency signal transmitted from the mother station unit and detecting the voice signal therefrom, Speaker which converts detected voice signal into voice A microphone for converting an external voice into an electrical voice signal, a transmitter for converting the voice signal of the microphone into a high frequency signal and transmitting the signal to the home unit, a call switch for opening and closing a signal for initiating and ending a call, For a mobile communication terminal equipped with a local station unit including a local station control unit for controlling the local station transmitting unit and the local station receiving unit based on the signal and the high frequency signal received from the local station receiving unit and controlling the control signal to be transmitted to the mother station unit through the local station unit. A wireless transceiver was constructed.

Preferably, the mother station unit is configured to further include a curl cord which is drawn out of the body and connected to the connector and serves as an antenna function for communicating with the host unit. It is connected to one side of the body so that it can hang on the neck and is configured to further include a necklace that serves as an antenna for communicating with the motherland unit.

Also preferably, the home station and the home unit are configured to operate in a power saving mode where they communicate with each other at minimum power before and after a call.

More preferably, the local station control unit has a processing routine for detecting a signal of the switch in the initial state and turning on the power to switch the local unit to the call mode, and then transmitting the mother station start signal to the mother station unit. The controller detects the signal of the switch only when the signal is maintained for a predetermined time. On the other hand, when the mother fisherman detects the motherland starting signal, the power is turned on to switch the motherland unit to the call mode, and the mobile communication terminal It is to have a processing routine to call.

Further, the mother international fisherman further has a processing routine for transmitting an audio and microphone mute off signal to the local unit after turning on the power of the mother country unit, but after the mother country unit is powered on. It further has a processing routine for transmitting a handshake signal to the local unit to confirm this, while the local station maintains the audio and microphone mute state after switching on the local unit before switching to the call mode. And a processing routine for releasing the mute state based on the audio and mic mute release signal of the mother country unit, and before processing the microphone mute release signal, a processing routine for confirming the handshake signal of the mother country unit. To have more.

Then, the local station control unit transmits a termination signal indicating the end of the call to the mother station based on the signal of the switch in the call connection state of the mobile communication terminal, and turns off the power of the local unit when there is a response from the mother station unit. Alternatively, when the call connection state of the mobile communication terminal is interrupted, a termination signal for informing the interruption is transmitted to the own station unit, and when there is a response from the own station unit, the processing unit further turns off the power of the mother country unit. The mother international fisherman responds with a handshake signal for detecting the termination signal of the native unit and turns off the power of the mother country unit, or responds with a handshake signal for detecting the termination signal of the mother country unit and notifies it. It is to have a processing routine for turning off the power of the local unit.

Hereinafter, with reference to the accompanying drawings will be described in detail.

The wireless transceiver of the mobile communication terminal according to the present invention communicates with the mother country unit 200 and the mother station unit 200 connected to the mobile communication terminal 100 by a high-frequency signal as shown in FIG. 1. It is made of a mark unit (300).

The mother station unit 200 includes a wireless transmission / reception circuit as shown in FIG. 2 for communicating the host unit 300 with a high frequency signal in its body, and a curl code 210 for transmitting a voice signal to one side of the body. And a pin plug connector 220 with the end of the curl cord 210 is provided. The connector 220 of the mother station unit 200 is for connecting to a pin jack type voice signal input / output terminal 110 provided in the mobile communication terminal 100. On the other hand, the curl cord 210 has two signal lines 211 and 212 connected to the voice signal input and output terminals and a ground line 213 for common grounding, and the ground line 213 is used as an antenna for transmitting and receiving the high frequency signal. Is to use.

The local station unit 300 has a microphone built in the body together with a wireless transmission / reception circuit as shown in FIG. 3 for communicating with the mother station unit 200 with a high frequency signal. The switch button 310 to be installed is provided with an earphone 320 attached to one side and a necklace strap 330 connected to the other side. Here, the necklace 330 is inserted into the antenna 331 for transmitting and receiving the high frequency signal.

That is, the mother station unit 200 is connected to the voice signal input / output terminal 110 of the mobile communication terminal 100 through the connector 220 and put in a pocket or a bag with the mobile communication terminal 100 to be carried. , The mark unit 300 is to be carried on the neck, using a necklace 330. To receive an incoming call with the hands-free function or to make a call by the hands-free function, the user can make a call by pressing the switch button 310 of the national unit 300 that was placed on the neck, while pressing the switch button 310, the local unit 300 Of course, the motherland unit 200 operates to communicate with each other by the modulated high-frequency signal, and can communicate with each other (voice signal), and when the call is over, press the switch button 310 again and the call function is blocked. Sleep mode waits for the next call. In the standby mode, the control signals modulated by high frequency signals are communicated with each other to control necessary operations such as starting and ending calls and power saving modes before and after calls.

Although the mother station unit 200 and the national unit 300 is not illustrated in the drawings, each of them is equipped with a separate battery cell and used as a power source for operation. Of course, if necessary, a separate external power source may be used for the motherland unit 200 connected to the mobile communication terminal 100 by wire, and the necessary power may be taken from the battery 120 attached to the mobile communication terminal 100. have.

Referring to FIG. 2, the wireless transmission / reception circuit embedded in the motherland unit 200 includes a mother radio transmission unit 230, a mother country player 240, and a mother international fishing unit 250.

The mother radio transmitter 230 outputs a high frequency by the microphone signal amplifier 231 and the local oscillator 232, which are output from the mobile communication terminal and amplified by the connector 220, according to the voice signal. A modulated split carrier modulator 233, a high frequency amplifier 234 for amplifying a high frequency signal modulated by the split carrier modulator 233, and an amplified high frequency signal in a band below a cutoff frequency in consideration of a frequency band used in a mobile communication terminal. Is composed of a low pass filter 235 that passes through the antenna 213.

The mother-of-law player 240 is a band filter 241 for passing a high frequency signal transmitted from the local unit 300 received by the antenna 213 at a predetermined frequency band, and the high frequency signal passed by the local oscillator 242. Mixing and converting to an intermediate frequency and amplifying the intermediate frequency, a frequency mixing and intermediate frequency amplifier (243), a detector (244) for extracting the speech signal by rectification, etc. in the amplified radio wave of the amplified intermediate frequency, amplified the detected speech signal The audio signal amplifier 245 is configured to input the voice signal to the mobile communication terminal through the connector 220.

The mother international fishing unit 250 uses a processing mechanism of a microcomputer, and transmits the mother country transmitter 230 and the mother state player 240 based on the control high frequency signal transmitted from the own country unit 300 and received by the mother state player unit 240. ), And a program having a processing routine (see FIG. 4) for controlling to transmit a high frequency control signal for response or control to the local station unit 300 through the mother station transmitter 230.

Referring to FIG. 3, the wireless transmission / reception circuit embedded in the local station unit 300 includes a local radio transmitter 340, a local radio player 350, and a local station controller 360.

The local radio transmitter 340 carries a high frequency by a microphone 341 for converting external voice into an electrical voice signal, a microphone signal amplifier 342 for amplifying the voice signal of the microphone 341, and a local oscillator 343. A split carrier modulator 344 modulating according to the voice signal, a high frequency amplifier 345 for amplifying a high frequency signal modulated by the split carrier modulator 344, and a frequency below a cutoff frequency in consideration of a frequency band used in a mobile communication terminal. A low pass filter 346 which passes the amplified high frequency signal to the antenna 331 in the band.

Local athletes 350 is a band filter 351 for passing a high frequency signal transmitted from the mother station unit 200 received by the antenna 331 at a predetermined frequency band, and the high frequency signal passed by the local oscillator 352 and the high frequency signal. Mixing and converting to an intermediate frequency and amplifying the intermediate frequency, a frequency mixing and intermediate frequency amplifier (353), a detector 354 for extracting the audio signal by rectification in the propagation of the amplified intermediate frequency, amplified detected voice signal Audio signal amplifier 355 and a speaker 356 mounted to the aforementioned earphone to convert the recorded voice signal into voice and to propagate it to the outside.

The local station control unit 360 uses a processing mechanism of a microcomputer, and transmits the local radio transmitter 340 and the local radio player 350 based on the control high frequency signal transmitted from the mother station unit 200 and received by the local station receiver 350. ), And a program having a processing routine (see FIG. 5) for controlling to transmit a high frequency control signal for response or control to the mother station unit 200 through the local radio transmitter 340.

Hereinafter, referring to FIG. 4, which shows an operation flowchart by the mother international fishery unit 250 of the mother country unit 200 and FIG. 5, which is an operation flowchart by the local station control unit 360 of the local station unit 300, as described above. The operation before and after the call between the motherland unit 200 and the own country unit 300 will be described.

First, referring to FIG. 4, when the initial power is applied, that is, when the battery is mounted, the mother international fishery unit 250 is required for a watchdog function for monitoring while shaking hands with the host unit 300. Each part of the circuit is initialized to operate in a power saving mode requiring only minimal power (S401). In this initialized state, the mother international fishery unit 250 detects in real time whether a base wake up signal is received from the host unit 300 (S402), and when the signal is detected, turns on the internal power. S403) to supply the necessary operating power to each unit, and transmits a handshake signal (handshake signal) at 500 Hz, preferably 200 msec, in order to inform the local station unit 300 of the response (S404). Subsequently, by activating the voice signal input / output terminal 110 of the mobile communication terminal 100, the mobile communication terminal 100 is connected to a call (S405), and the local unit 300 transmits an audio and microphone mute release signal (S406). do.

Thereafter, the mobile station 300 waits while determining whether there is a response (S407), and when the response is received, commands audio and microphone mute (S408) to switch to the call mode (S409).

During a call, the terminal unit 300 detects in real time whether a hang up signal is received from the unit 300, and determines the end of the call by the user (S410). After transmitting to the terminal (S411) and turning off the power of the mother station unit, and if the termination signal is not received, the signal is inputted by the other party from the signal potential of the voice signal input / output terminal 110 of the mobile communication terminal 100. If it is determined that the call is in the stopped state (S412), and if it is determined that the call is in a suspended state, the terminal signal indicating the call termination state is transmitted to the local unit 300 (S413), and the local unit 300 determines whether there is a response. If there is a response (S414), the mother station unit 200 is turned off (OFF) to switch to a power saving mode (S415), and circuit units are initialized (S401).

That is, even though the other party hangs up, the user does not operate the switch button 310 without any manipulation, thereby preventing the call from being maintained and preventing unnecessary power consumption.

Next, referring to FIG. 5, the local station controller 360 likewise saves power when only the minimum power required for the watchdog function for monitoring while communicating with the mother country unit 200 when the initial power is applied, that is, the battery is installed. Each part of the circuit is initialized to be operated in the mode (S501), and in this state, the user detects whether the switch button 310 is manipulated (stich on) in real time (S502). When the operation of the switch button 310 is detected, the power is immediately turned on (S503) to supply the necessary operating power to each circuit, and then transmits the above-described base wake up signal (S504).

Then, after transmitting the mother station start signal, it is determined whether the mother station unit 200 responds with the above-described handshake signal (S505), and if the response is determined, the aforementioned audio and microphone mute signals from the mother station unit 200 are received. It is determined whether or not (S506). When both the response and the signal reception are determined, the device transmits a handshake signal to the device in response to the signal (S507), and instructs the audio and microphone mute (S508) to switch to the call mode (S509).

During the call, it is determined whether the call is terminated by the operation of the user's switch button 310 (S510). When the call is determined to be terminated, a call signal (hang up signal) is transmitted to the motherland unit 200 (S511). It is determined whether there is a response from the unit 200 (S512), and when the response is received, the local unit 300 is turned off, and when the call is not terminated by the user, the mother station unit 200 transmits it. Determining the termination of the call by the other party by detecting the termination signal (S513) and if it is determined that the call is stopped, the handshake signal is transmitted to the home station unit 200 in response thereto (S514), and then the power is turned off (OFF) to save power. The mode is switched (S515) and initialized (S501).

In the above operation, the signal by the operation of the switch button 310 is always the same, but when the signal is detected in the initial state, it is a power on signal for initiating a call and hangs up when it is detected during the call. signal). On the other hand, if the switch button 310 is accidentally or touched by an external object may cause a malfunction. On the other hand, while the switch button 310 is operated (ON), the pulse signal of a certain period is continuously output, and the local station control unit 360 counts the pulse signal in the rising or falling section and counts the number of pulses to a predetermined number or more. If it is determined that the power-on signal or the vertical signal when the malfunction may be prevented.

As described through the above embodiments, the present invention checks the response after the mother station unit 200 and the host unit 300 transmit control signals such as the above-described handshake signal, which are mutually regulated, as a high frequency signal. By communicating with each other in the process of communication, it provides a hands-free function that can exchange voice signals through radio frequency, that is, high frequency, with stable control for call initiation and termination.

The radio frequency used in the present invention can be adjusted so as not to interfere with the frequency band used by the mobile communication station, thereby eliminating external interference. In addition, with clear sound quality, it can make a call from a relatively long distance (over 2m). Therefore, it provides a convenient hands-free function in the vehicle or indoors as well as without inconvenience or malfunction while moving the street.

In particular, the present invention implements the miniaturization of the high-frequency transmission and reception circuit, the low power consumption, and the bidirectional simultaneous transmission function using the delicate processing mechanism of the microcomputer, thereby enabling the practical use of the wireless transmitter and receiver which is very suitable for the mobile communication terminal.

Claims (10)

A connector connected to the voice signal input / output terminal of the mobile communication terminal, a mother station transmitter which modulates the voice output signal of the mobile communication terminal inputted through the connector into a high frequency signal and transmits it to the outside, and receives an external high frequency signal from the voice input signal. Detects and inputs to the mobile communication terminal through the connector, and controls the call connection state of the home station transmitter, the home receiver and the mobile communication terminal based on the external high frequency signal received by the home receiver, A mother country unit including a mother international fisherman controlling to transmit a high frequency signal for control to the outside; A local station receiving unit for receiving the high frequency signal transmitted from the mother station unit and detecting the voice signal therefrom, a speaker for converting the voice signal detected by the local station receiver into voice, a microphone for converting external voice into an electrical voice signal, the microphone A transmitter for converting a voice signal into a high frequency signal and transmitting it to the home station unit, a switch for opening / closing a signal for initiating and ending a call, the local station and the local station based on the signal of the switch and the high frequency signal received from the local station. And a local station unit including a local station control unit configured to control a control signal to be transmitted to the mother station unit through a local station transmitter. The wireless transceiver of claim 1, further comprising a curl code that is drawn out of the body and connected to the connector and serves as an antenna function for communicating with the home unit. The wireless transceiver of claim 1, further comprising a collar that is connected to one side of the body unit and is hooked to a neck and serves as an antenna function for communicating with the mother country unit. The wireless transceiver of claim 1, wherein the home station and the home station are configured to operate in a power saving mode where they communicate with each other at minimum power before and after a call. The apparatus of claim 1, wherein the host controller detects a signal of the switch in an initial state and has a processing routine for transmitting a mother station start signal to a mother station unit after the power is turned on to switch the slave unit to a call mode. And a processing routine for turning on the power to switch the motherland unit to the call mode when the mother international language unit detects the motherland starting signal, and for connecting the mobile communication terminal to the call. The wireless transceiver of claim 5, wherein the local station controller detects the signal of the switch only for a predetermined time or longer. The apparatus of claim 5, further comprising a processing routine for transmitting an audio and microphone mute release signal to the local unit after the mother international fisherman turns on the mother country unit. A processing routine for maintaining the audio and microphone mute state after the local station controller turns on the local unit and before switching to the call mode and releases the mute state based on the audio and microphone mute release signal of the mother station unit. The wireless transceiver of the mobile communication terminal further having. 8. The processing apparatus according to claim 7, further comprising a processing routine for transmitting a handshake signal for confirming the mother international unit after the mother unit is powered on. And a processing routine for confirming the handshake signal of the mother station unit before the host controller receives the microphone mute release signal. The home station unit of claim 1, wherein the home station controller transmits a call signal indicating the end of a call to a home station unit in response to a call from the home station unit based on a signal of the switch in a call connection state of the mobile communication terminal. Have a processing routine And a processing routine for turning off the power of the mother-unit unit after the mother-language fisherman detects the termination signal of the own unit and responds with a handshake signal. The mother country unit of claim 1 or 2, wherein when the call connection state of the mobile communication terminal is interrupted, the mother international unit transmits a termination signal indicating the interruption to the own station unit and turns off the power of the mother country unit when there is a response from the own station unit. Have more processing routines, And a processing routine for turning off the power of the slave unit after the slave controller detects the termination signal of the mother station unit and responds with a handshake signal for informing it.