KR20050062073A - Changing method and apparatus between tx mode and rx mode of half duplex communication unit - Google Patents

Abstract

The present invention relates to a radio, and more particularly to a method and apparatus for switching between a transmission mode and a reception mode.

The present invention relates to a method of switching between a transmission mode and a reception mode of a communication device having a radio function, wherein an operation time of a reception mode in which a radio reception path in a known radio circuit is activated and a radio transmission path in a known radio circuit are determined. Setting an operation time of an activated transmission mode, alternately repeating the reception mode and the transmission mode, respectively performing the reception mode and the transmission mode for the set time, and switching the mode between the transmission mode and the reception mode It characterized in that it comprises a step of automatically performing.

Description

CHANGING METHOD AND APPARATUS BETWEEN TX MODE AND RX MODE OF HALF DUPLEX COMMUNICATION UNIT}

The present invention relates to a radio, and more particularly to a method and apparatus for switching between a transmission mode and a reception mode.

Radios generally use half duplex. As is well known, half-duplex means that signals can be transmitted in both directions, but not simultaneously. That is, after transmitting a signal from one radio, it is possible to transmit a signal from another radio.

Radios can be divided into industrial, domestic and simple frequency communication radios, depending on their frequency and use. The industrial can be divided into general radio stations and simple radio stations, which are assigned or allocated according to the purpose of use, and simple radio stations are used only by those who have a business registration certificate in the frequency band designated by the government. . At this time, the industrial radio uses 136 ~ 172MHz, 444MHz frequency band, the general radio station is used for police, fire department and military, the simple radio station is mainly used in building security, factory security, broadcasting. In addition, the domestic radio was first introduced in 1995 in Korea in order to activate the wireless communication of general consumers, and is classified into the first living radio station using the short wave frequency in the 27 MHz band and the second type using the microwave / microwave frequency in the 440 MHz band. do.

In the present invention, a reception mode and a transmission mode of the radio will be defined as follows for convenience of description.

That is, the reception mode refers to a mode in which the radio reception path is activated in the known radio circuit, and the transmission mode refers to a mode in which the radio transmission path is activated in the known radio circuit.

As the radio uses half duplex, the radio must switch between receive and transmit modes. That is, in a reception mode, a voice signal of the other party wirelessly received from another radio is received and output to a user, and in a transmission mode, the user's voice is transmitted and wirelessly transmitted to another radio.

At this time, a transmission / reception switching switch is provided to switch between a transmission mode and a reception mode. The transmit / receive switch may be implemented by a push to talk (PTT) button. The PTT button literally means pressing the button and talking. If the user does not press the PTT button, the radio operates in the reception mode, processes the voice of the other party wirelessly received from another radio, and outputs it to the user. When the user presses the PTT button, the radio operates in the transmission mode and transmits the user's voice to other radios.

However, as in the related art, when the transmission / reception mode switching is performed by pressing a mechanical switch, the user must always hold the radio for radio communication so that it is inconvenient to use the radio while driving or performing other tasks at the same time.

In order to solve the problem of the user pressing the button directly, a technique for switching between the transmission mode and the reception mode is disclosed.

According to Korean Utility Model Registration No. 309723, the Voice Activated Transmission (VOX) function is used instead of pressing a switch. The VOX function aims to detect the loudness of the spoken voice so that the user's voice can be transmitted if the voice is spoken without manually manipulating the PTT button (transmit / receive call button).

However, when looking at the prior art, first, a component for determining whether voice is input must be added to the radio separately, and there may be ambient noise in addition to the user's voice, so that switching of a transmission / reception mode may cause a malfunction. There is a problem.

The present invention has been made in such a situation, while allowing the user to receive and transmit voice without pressing the transmission / reception switch button, while minimizing the hardware modification of the existing communication device without the need for additional additional components The purpose is to provide a simple way to implement.

In order to achieve the above object, the present invention provides a communication device having a radio function, repeatedly performing a reception mode and a transmission mode alternately, respectively, performing the reception mode and the transmission mode for the set time, respectively, Mode switching between reception modes is automatically performed.

Accordingly, the user can perform voice reception and transmission without pressing a transmission / reception switch button, but it can be easily implemented while minimizing deformation of the existing communication device without requiring an additional additional component.

The foregoing and further aspects of the present invention will become more apparent through the following embodiments. Hereinafter, the present invention will be described in detail with reference to the preferred embodiments described with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce.

1 is an example showing the configuration of a radio to which the present invention is applied.

The duplexer 113 outputs a high frequency signal received from the antenna to the wireless receiver 117 and outputs a transmission frequency signal supplied from the wireless transmitter 111 to the antenna.

The wireless receiver 117 amplifies the high frequency signal supplied through the duplexer 113, makes it back to an intermediate frequency, detects and demodulates the intermediate frequency, and outputs the extracted voice signal to the voice amplifier 115.

The voice amplifier 115 amplifies the voice signal supplied through the wireless receiver 117 and outputs the voice signal to the outside through the speaker.

The voice detector 107 detects a voice signal input through the microphone, and sends a voice signal to the voice modulator 109 when there is a voice signal to be input. The voice modulator 109 modulates the voice signal into a transmission frequency signal and outputs the voice signal to the wireless transmitter 111.

The wireless transmitter 111 radiates the radio signal amplified by the voice modulator 109 into the air through the duplexer 113 and the antenna.

The controller 110 interprets the manipulation signal when the manipulation signal of the user is input through the manipulation unit 103 and controls the operation of each component of the radio.

When the channel selection signal is input through the operation unit 103, the controller 110 sets corresponding frequencies of the voice modulator 109, the wireless transmitter 111, and the wireless receiver 117, and controls the reception mode and the transmission mode. do.

As described above, the reception mode refers to a mode in which the radio reception path is activated in the (known) radio circuit. In the embodiment of FIG. 1, the radio receiving path may be denoted by reference numeral 120. That is, the wireless reception path may be a path through the duplexer 113, the wireless receiver 117, the voice amplifier 115, the speaker, and the like, in which the received voice signal is processed.

In addition, the transmission mode refers to a mode in which the radio transmission path is activated in the (known) radio circuit. In the embodiment of FIG. 1, the radio transmission path may be denoted by reference numeral 120. That is, the wireless transmission path may be a path via a microphone, a voice detector 107, a voice modulator 109, a wireless transmitter 111, a duplexer 113, or the like, through which a voice signal to be transmitted is transmitted.

In addition, the controller 110 may visually display the current progress of the reception mode and the transmission mode through the display unit 101.

The storage unit 105 stores program data describing a method of switching between a transmission mode and a reception mode according to an embodiment of the present invention.

2 is a flowchart illustrating a method of switching between a transmission mode and a reception mode according to a preferred embodiment of the present invention. Hereinafter, a description will be given with reference to FIG. 1.

As shown in FIG. 2, according to a preferred embodiment of the present invention, in a method of switching between a transmission mode and a reception mode of a communication device having a radio function, a radio reception path 130 of a known radio circuit is provided. Setting an operation time of an active reception mode and an operation time of a transmission mode in which a radio transmission path 120 in a known radio circuit is activated, and repeatedly performing the reception mode and the transmission mode alternately, And performing steps 209, 211, and 215 of performing the reception mode and the transmission mode for the set time, respectively, and automatically performing mode switching between the transmission mode and the reception mode.

According to a preferred embodiment of the present invention, the user can preset the operation time of the reception mode and the transmission mode. That is, the controller 110 recognizes a setting signal of the time (the transmission mode and the reception mode are activated) input through the operation unit 103 and stores it in the storage unit 105 (for example, reception). The mode is set to 20 seconds, and the transmission mode is set to 5 seconds.

Radio communication is initiated (203). This step 203 may be implemented by the user operating the operation unit 103 to turn on the power of the radio. In addition, after turning on the radio, the user may operate the operation unit 103 to select a specific channel. For example, when the power is turned on, the controller 110 may first activate the reception mode. Such radio communication initiation steps are obvious to those skilled in the art.

When radio communication is started (203), the controller 110 checks whether automatic transmission / reception mode switching according to the present invention is set (205). If the automatic transmission / reception mode is not set, the controller 110 performs an operation of the existing PTT mode (207). For example, when the radio communication is started, the control unit 110 controls the operation of the reception mode. When the user operates the operation unit 103 and presses the PTT button, the control unit 110 controls the operation of the transmission mode.

If automatic transmission / reception mode is set according to the present invention, the controller 110 alternately repeats the reception mode and the transmission mode, and performs the reception mode and the transmission mode for the time set in step 201, respectively, Mode switching between the mode and the reception mode is automatically performed (209, 211, 215).

For example, the controller 110 first performs a reception mode for a preset time (ex: 20 seconds) (209). The controller 110 automatically switches to the transmission mode and performs the transmission mode for a preset time (ex: 5 seconds) without pressing the PTT button as in the related art (211). If no event (eg, power off) occurs that the radio communication ends, the controller 110 repeats steps 209 and 211 (215).

Accordingly, the user can perform voice reception and transmission without pressing a transmission / reception switch button, but it can be easily implemented while minimizing deformation of the existing communication device without requiring an additional additional component.

According to a further aspect of the invention, the control unit 110 notifies the user via the display unit 101 that the receiving mode is in operation (see 209) during the time when the receiving mode is operated (not shown in FIG. 2 above). And (2) notifying the user via the display unit 101 that the transmission mode is operating (not shown in FIG. 2) during the time when the transmission mode is operated. .

Accordingly, the user can visually recognize the current mode of the radio, thereby preventing confusion of radio communication.

Unexplained step 213 allows the user to switch to the existing PTT mode by the user's selection while the automatic transmission / reception mode switching operation according to the present invention is being performed.

During the control operation of the transmission mode or the reception mode, if a corresponding command signal is input through the operation unit 103 (213), the control unit 110 operates in the existing PTT mode. Of course, even during the operation in the PTT mode, the controller 110 may return to the automatic transmission and reception mode switching operation of the present invention.

On the other hand, the manufacturing technology of the radio-mobile combined communication terminal is known. The radio combined mobile communication terminal can be manufactured according to various implementation methods.

For example, Korean Patent Laid-Open Publication No. 2002-78734 discloses a technology for implementing a one-way living radio using a mobile communication terminal using a PLL for supplying a local signal of a radio.

In addition, Korean Patent Laid-Open Publication No. 2003-30322 discloses a technology for implementing a mobile terminal and a communication terminal mixed with a radio function that enables a low cost and miniaturization by sharing an RF circuit between a cellular unit and a radio unit.

In the present invention, a communication device having a radio function includes the above-mentioned radio only communication device and a radio combined mobile communication terminal. Therefore, it should be noted that the present invention can be applied to a mobile radio terminal.

Hereinafter, an example in which the present invention is applied to the radio combined mobile communication terminal of the above-mentioned Publication No. 2002-78734 will be described with reference to FIGS. 3 and 4.

3 is an example illustrating the configuration of a mobile radio terminal.

The switch unit 301 allows a user to select CDMA communication and radio communication.

The frequency supply unit 305 generates a local signal for CDMA mobile communication and supplies it to the CDMA transceiver 303, and generates a local signal for radio and supplies it to the transceiver transceiver 307.

When the CDMA transceiver 303 receives the RF reception signal for the CDMA mobile communication from the antenna, the CDMA transceiver 303 mixes with the local signal for CDMA mobile communication received from the frequency supply unit 305 and demodulates the CDMA mobile communication IF received signal to the MSM 310. On the other hand, when receiving the CDMA mobile communication IF transmission signal from the MSM 310, modulated to the CDMA mobile communication RF transmission signal mixed with the CDMA mobile communication local signal received from the frequency supply unit 305 and transmitted to the base station through the antenna It plays a role.

When the transceiver 307 receives the radio RF signal (for example, 448 MHz band) from the antenna, it is mixed with the radio local signal received from the frequency supply unit 305 to the radio IF signal (for example, 85.38 MHz). After demodulating and transmitting to the MSN 310, when receiving the radio IF transmission signal (e.g., 130.38MHz) from the MSM 310, it is mixed with the radio local signal received from the frequency supply unit 305 and transmits the radio RF It modulates the signal (448MHz) and transmits it through the antenna.

The MSM 310 receives the switching selection signal from the key input unit 309 and transmits the switching control signal to the switch unit 301, while receiving the IF signal from the CDMA transceiver 303 and the transceiver transceiver 307. This is converted into a voice signal and outputs the voice of the other party to the user through a speaker (not shown in FIG. 3). In addition, the MSM 310 receives a user's voice through a microphone (not shown in FIG. 3), converts the user's voice into an IF signal, and transmits it to the CDMA transceiver 303 or the transceiver 307. . In this case, the MSM 310 is a modem chip that uses CDMA / FM as a dual-use modem. The MSM 310 can raise the radio IF signal from 21 MHz to 85.38 MHz to simultaneously modulate / demodulate the mobile communication terminal and the radio using one modem chip. have.

The MSM 310 also performs an operation of controlling a method of switching between a transmission mode in which the radio transmission path is activated and a reception mode in which the radio reception path is activated, according to a preferred embodiment of the present invention.

Hereinafter, a description will be given with reference to FIG. 4.

The radio transceiver 405 includes a radio receiver 420 and a radio transmitter 430. The radio receiver 420 is activated under the control of the MSM 410 and, as described above, receives the radio RF reception signal (eg, 448 MHz) from the switch unit (see 301 of FIG. 3) and receives the radio IF. It demodulates the signal (85.38 MHz) and transmits it to the MSM 410.

The radio receiver 420 may be implemented as an RF receiver amplifier, an RF receiver filter, a mixer for receiving a radio signal, and an IF receiver filter.

For example, the RF reception amplifier unit receives a radio RF reception signal (448MHz band) from the antenna and amplifies the gain of the radio reception signal for the radio and serves to output to the RF reception filter.

In addition, the RF reception filter receives the radio RF signal received by the gain amplified from the RF reception amplifier to remove the noise through filtering and outputs the radio signal reception mixer.

The mixer for receiving a radio signal receives a radio signal for a radio amplified from the RF receiving filter unit and at the same time receives and mixes a radio local signal (315MHz to 365MHz) from a frequency supply unit (see 305 of FIG. 3). It outputs the radio IF signal (85.38MHz) to the receiver filter.

The IF reception filter unit receives the radio IF reception signal from the radio signal mixer and performs a role of removing noise through filtering and outputting to the MSM 410.

The MSM 410 performs a process such as a voice codec on a signal input from the radio receiver 420 and outputs the same to a user through a speaker (not shown in FIG. 4).

Accordingly, according to the embodiment of FIG. 4, the radio reception path in the radio circuit may be a reception processing path in the radio receiver 420, a voice processing path in the MSM 410, and a path output through the speaker. Can be.

The radio transmitter 430 is activated under the control of the MSM 410. As described above, the radio transmitter 430 receives a radio IF signal (eg, 130.38 MHz) from the MSM 410 and transmits an RF transmitter signal (eg, 448 MHz). ) And transmits to the antenna through the switch unit (see 301 of FIG. 3).

In this case, the MSM 410 performs a process such as a voice codec on a user's voice input from a microphone (not shown in FIG. 4), and inputs it to the radio transmitter 430.

The radio transmitter 430 may be implemented as an IF transmitter filter unit, a transceiver unit for transmitting a radio signal, an RF transmitter, and an RF transmitter.

For example, the IF transmission filter unit receives the radio IF transmission signal (130MHz) from the MSM 410, removes noise through filtering, and performs a role of outputting the radio signal transmission mixer.

Mixer unit for transmitting radio signal receives radio IF signal (130MHz) for removing noise from IF transmitter filter unit and mixes local radio signal (315MHz ~ 365MHz) for radio from frequency supply unit 305 It outputs an RF transmission signal (448MHz) to the RF transmission amplifier.

The RF transmission amplifier unit receives a radio frequency RF transmission signal (448MHz) from the mixer for transmitting the radio signal and amplifies the gain of the radio frequency RF transmission signal for outputting to the RF transmission filter unit.

The RF transmission filter unit receives a radio frequency RF transmission signal (448MHz) from the RF transmission amplification unit, removes noise through filtering, and performs a wireless output through the switch unit 301.

Accordingly, according to the embodiment of FIG. 4, the radio transmission path in the radio circuit receives a user's voice through a transmission processing path in the radio transmitter 430, a voice processing path in the MSM 410, and a microphone. Can be up to the path.

The present invention can also be implemented in a radio-equipped mobile communication terminal such as Korean Patent Laid-Open Publication No. 2003-30322.

As described above, this publication shares the RF circuit between the cellular portion and the radio portion. According to FIG. 2 of the above publication, a configuration of a transmitting end 210 and a receiving end 250 is disclosed as a combined RF circuit. The wireless transmission path of the present invention is implemented by the transmitting end 210, the wireless receiving path may be implemented by the receiving end (205).

As described above, according to an embodiment of the present invention, the user can receive and transmit voices without pressing a transmission / reception switch button, but does not require any additional parts and minimizes deformation of an existing communication device. It will be simple to implement.

In addition, it is possible to visually display the switching situation between the transmission mode and the reception mode to the user.

In addition, the present invention can be implemented in a radio-only mobile terminal as well as a radio-only terminal.

Although the present invention has been described with reference to the accompanying drawings, it should not be construed as being limited thereto, but should be construed to cover many modifications that are obvious from this.

1 is an example showing the configuration of a radio to which the present invention is applied.

2 is a flowchart illustrating a method of switching between a transmission mode and a reception mode according to a preferred embodiment of the present invention.

Figure 3 is an example showing the configuration of a combined mobile communication terminal to which the present invention is applied.

4 is a diagram illustrating an internal configuration of the transceiver of FIG. 3.

Claims (6)

In the method of switching between a transmission mode and a reception mode of a communication device having a radio function, Setting an operation time of a reception mode in which a radio reception path in a known radio circuit is activated and an operation time of a transmission mode in which a radio transmission path in a known radio circuit is activated; And repeatedly performing the reception mode and the transmission mode alternately, respectively performing the reception mode and the transmission mode for the set time, and automatically performing a mode switch between the transmission mode and the reception mode. A method of switching between a transmission mode and a reception mode of a communication device having a one-way radio function. The method according to claim 1, Notifying the user that the reception mode is in operation during the time in which the reception mode is in operation; And And informing the user that the transmission mode is in operation during the time that the transmission mode is in operation. 2. A method of switching between a transmission mode and a reception mode of a communication device having a one-way radio function. The method according to claim 1, The communication device having the radio function, And a radio communication mobile terminal. 2. A method of switching between a transmission mode and a reception mode of a communication device having a one-way radio function. In the apparatus for switching between a transmission mode and a reception mode of a communication device having a radio function, A known radio reception path unit for receiving and processing the voice of the other party; A known radio transmission path section for transmitting and processing a user's voice; Set an operation time of a reception mode in which the radio reception path unit is activated and an operation time of a transmission mode in which the radio transmission path unit is activated, and repeatedly perform the reception mode and the transmission mode, respectively, the reception mode and the transmission mode, respectively. And a control unit which is performed during the set time and automatically performs a mode switching between the transmission mode and the reception mode. The method according to claim 4, The display unit is further included, The control unit informs the user that the reception mode is in operation during the time when the reception mode is in operation, and the user through the display unit that the transmission mode is in operation during the time in which the transmission mode is in operation. And performing an operation of notifying the user of the communication device. The apparatus for switching between a transmission mode and a reception mode of a communication device having a unidirectional radio function. The method according to claim 4, And a communication device having a radio function, wherein the communication device is a mobile communication terminal for both radio and radio. The apparatus for switching between a transmission mode and a reception mode of a communication device having a unidirectional radio function.