KR20170012712A - PTT terminal using bluetooth and method for providing PTT service - Google Patents

Abstract

A PTT terminal using Bluetooth and a service providing method thereof are disclosed. The PTT terminal according to an embodiment of the present invention includes a PTT microphone for receiving a voice signal, a PTT speaker for outputting a voice signal, and a Bluetooth terminal connected to a portable terminal that transmits and receives a voice signal in the form of packet data based on a wireless communication network A communication unit for transmitting a voice signal received through the PTT microphone to the portable terminal in a communication mode after the Bluetooth connection, receiving the voice signal from the portable terminal and transmitting the voice signal to the PTT speaker, and a controller for controlling the Bluetooth connection with the portable terminal through the communication unit, And a controller for providing a PTT service including a voice call using the portable terminal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a PTT terminal using Bluetooth,

The present invention relates to a radio technology, and more particularly to a radio technology using Bluetooth.

Push to Talk (PTT) service is an instant messenger service such as a radio service, and allows simple communication while pressing and holding the PTT button without going through a process such as a dial operation or a telephone connection . One of the PTT services is widely used when a customer requests a taxi or a lorry to make a quick and accurate dispatch by transmitting the call information to the driver of the vehicle in close proximity to the customer.

1 is an external view showing a TRS radio using a public switched telephone system (TRS).

Referring to FIG. 1, when a TRS radio is applied to a call system for dispatching a taxi or a freight vehicle, a TRS communication network using a common frequency is used to voice the location of a customer to a TRS radio of the entire vehicle, The dispatch is made by letting the driver respond.

2 is an external view showing an IP-PTT (Internet Protocol-Push To Talk) radio using a mobile phone wireless communication network.

Referring to FIG. 2, the IP-PTT transceiver is a PTT transceiver having a wireless communication network function based on IP, and is a dedicated transceiver for transmitting and receiving voice data in the form of packet data through a wireless communication network such as 3G or 4G. These IP-PTT radios are not only expensive, they can only display limited status through LED, and they can not transmit or receive text messages.

According to an embodiment, a PTT terminal using Bluetooth and a service providing method thereof can be provided to easily provide a PTT service at a low cost and to solve an inconvenient or dangerous problem when using a PTT button, a microphone, and a speaker included in a portable terminal I suggest.

The PTT terminal according to an embodiment includes a PTT microphone for receiving a voice signal, a PTT speaker for outputting a voice signal, a Bluetooth terminal for connecting and receiving a voice signal in the form of packet data on the basis of a wireless communication network, A communication unit for transmitting the voice signal input through the PTT microphone to the portable terminal and for receiving the voice signal from the portable terminal and transmitting the voice signal to the PTT speaker in a call mode, a Bluetooth unit for controlling Bluetooth connection with the portable terminal through the communication unit, To provide a PTT service including a voice call.

The PTT terminal according to an embodiment further includes a PTT button for key input or key release by the user. When the PTT button is pressed, the user enters a communication mode in which voice signals can be transmitted and received. When the PTT button is released, And is terminated.

The controller generates a first control signal and transmits the generated first control signal to the portable terminal through the communication unit to transmit the generated first control signal to the portable terminal through the communication function through the wireless communication network of the portable terminal Generates a second control signal when the communication mode is terminated, transmits the generated second control signal to the portable terminal through the communication unit, and deactivates the communication function through the wireless communication network of the portable terminal by the second control signal . At this time, the communication function through the wireless communication network of the mobile terminal includes a voice call and a text message transmission / reception. The first control signal and the second control signal may be transmitted to the mobile terminal using AVRCP (Audio / Video Remote Control Profile).

The communication unit may include a digital signal processing unit for digitizing a voice signal input through the PTT microphone or converting the converted baseband signal into analog signals and transmitting the converted baseband signal to a PTT speaker, a filter for extracting a baseband signal from the digitized voice signal, An RF processor for modulating and converting the extracted baseband signal into a high frequency signal or demodulating and converting a high frequency signal into a baseband signal, and an RF processor for transmitting the converted high frequency signal to the portable terminal as a Bluetooth signal, And an antenna for receiving signals.

A PTT terminal according to an exemplary embodiment includes a power supply unit that is supplied with power from a vehicle, a battery, a micro USB port connected to the portable terminal, and a micro USB port that charges the battery through the micro USB port or uses a portable terminal charger And a charging unit charging the battery.

The PTT terminal according to one embodiment further includes a light emitting unit for displaying a Bluetooth connection state and a battery state through light emission.

A method of providing a PTT service according to another embodiment includes the steps of: a PTT terminal is Bluetooth-connected to a mobile terminal; a Bluetooth-connected mobile terminal registers a service with the PTT server; and the PTT terminal receives a PTT button key from the user, Transmitting a first control signal to the mobile terminal via the PTT server and requesting a connection to the delivery terminal through the PTT server and receiving a connection response from the delivery terminal via the PTT server, A step in which the portable terminal that has received the PTT terminal approves the connection to the PTT terminal and the step in which the connection approved PTT terminal communicates with the delivery terminal through the portable terminal.

The PTT terminal according to an exemplary embodiment of the present invention may be configured such that the PTT terminal receives voice through the PTT microphone and transmits the voice signal to the Bluetooth-connected portable terminal through the portable terminal, Transmitting the voice signal to the portable terminal through the wireless communication network in the form of packet data, and transmitting the voice signal to the portable terminal through the wireless communication network in the form of packet data, And transmitting the signal to the Bluetooth-connected PTT terminal and outputting the received voice signal through the PTT speaker.

A method of providing a PTT service according to an exemplary embodiment of the present invention further includes receiving a text message from a dispatcher terminal and displaying the received text message on a portable terminal connected to the dispatcher terminal.

A method of providing a PTT service according to an embodiment includes: transmitting a second control signal to a portable terminal in response to a PTT terminal's release of a PTT button key; and transmitting, by a second control signal, The method comprising the steps of: receiving a connection release response from the PTT server and requesting a connection release; receiving a connection release response from the delivery terminal via the PTT server; And the step of releasing.

According to one embodiment, the PTT terminal is Bluetooth-connected to the expensive portable terminal, and the PTT terminal uses the wireless communication network-based IP-PTT communication function of the Bluetooth-connected portable terminal, The same IP-PTT service can be used at a lower cost than the PTT dedicated terminal. In addition, an additional service such as a text message can be used through the mobile terminal.

Further, when an application of the mobile terminal is executed and the microphone and speaker of the portable terminal are used instead of the PTT button on the touch screen, it is inconvenient for the user to press the PTT button and especially dangerous during driving, However, since the PTT terminal, the PTT microphone, and the PTT speaker are provided in the PTT terminal, the above-described problem can be solved.

In addition, various information such as the Bluetooth connection status and the battery status can be informed to the user by using the same light emission as the LED of the PTT terminal. Further, since the battery is charged using the micro USB port or the mobile terminal charger, the power supply and the charging method are simple.

1 is an external view showing a TRS radio using a public frequency system (Trunk Radio System: TRS)
FIG. 2 is an external view showing an IP-PTT (Personal Digital Assistant) dedicated radio using a mobile phone wireless communication network. FIG.
FIG. 3 is an external view illustrating a push to talk (PTT) terminal and a mobile terminal connected in a bluetooth manner according to an embodiment of the present invention.
FIG. 4 is a detailed configuration diagram of the PTT terminal of FIG. 3 according to an embodiment of the present invention;
5 is a configuration diagram of a PTT service providing system according to an embodiment of the present invention;
6A and 6B are flowcharts illustrating a method of providing a PTT service according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention of the user, the operator, or the custom. Therefore, the definition should be based on the contents throughout this specification.

3 is an external view illustrating a Push To Talk (PTT) terminal and a portable terminal connected in a bluetooth manner according to an embodiment of the present invention.

Referring to FIG. 3, the PTT terminal 1 is wirelessly connected to the mobile terminal 2 using Bluetooth. The portable terminal 2 includes an Internet Protocol (IP) -based PTT (IP-PTT) service for transmitting and receiving voice signals in the form of packet data over the Internet based on a wireless communication network Lt; / RTI > The IP-PTT service includes a voice call and a text message transmission / reception. The PTT terminal 1 is Bluetooth-connected to the portable terminal 2 and uses the wireless communication network-based IP-PTT service of the Bluetooth-connected portable terminal 2.

The PTT terminal 1 includes a PTT microphone for receiving a voice signal from a user and a PTT speaker for outputting a voice signal to a user. The PTT terminal 1 transmits the voice signal input through the PTT microphone to the Bluetooth-connected portable terminal 2, receives the voice signal from the Bluetooth-connected portable terminal 2, and outputs the voice signal through the PTT speaker.

The PTT terminal 1 according to one embodiment includes a PTT button 112 that is keyed or unkeyed by a user. For example, the PTT button 112 is key-operated by an operation that is pushed by the user, and the key input is canceled by the operation of releasing the user. When the PTT button 112 is pressed, the communication mode is entered. In the communication mode, it is possible to transmit a voice signal input through the PTT microphone to the portable terminal 2 or output a voice signal received from the portable terminal 2 through the PTT speaker. On the other hand, when the PTT button 112 is released, the voice call service is terminated. The communication function through the PTT button is an embodiment of the present invention, and can be replaced with a VOX (Voice Activated Transmission) function instead of the PTT button.

The portable terminal 2 may be any electronic device using a wireless communication network. For example, the portable terminal 2 may be a smart phone, but is not limited thereto. The portable terminal 2 transmits / receives a control signal to / from the PTT terminal 1 and activates a communication function through the wireless communication network in accordance with the control signal. The portable terminal 2 may have an IP-PTT app installed or may be downloaded to perform the above-described functions. The portable terminal 2 can display a text message received through the wireless communication network on the screen.

The wireless communication network may include a third generation mobile communication network (3G), a long term evolution (LTE) network, a fourth generation mobile communication network 4G, etc. classified into WCDMA (Wideband Code Division Multiple Access) and CDMA 2000 And all future mobile communication networks.

A wireless communication network uses a method of communicating packet data over the Internet. Packet data communication over a wireless communication network can be routed through and over the network using multiple Packet Data Service Nodes (PDSNs). At this time, the communication for the PTT service is packet data communication using Voice Over Internet Protocol (VoIP) to carry voice as packet data between the transceivers.

The PTT terminal 1 connects to the expensive portable terminal 2 via the Bluetooth and the PTT terminal 1 uses the wireless communication network based IP-PTT communication function of the portable terminal 2 connected with the Bluetooth. Accordingly, the same IP-PTT service can be used at a lower cost than an expensive IP-PTT dedicated terminal having an IP-PTT function. In addition, an additional service such as a text message can be used through the mobile terminal 2.

Further, when an application of the portable terminal 2 is executed and the microphone and speaker of the portable terminal 2 are used instead of the PTT button on the touch screen, it is inconvenient for the user to press the PTT button. It can be dangerous. Also, it is inconvenient to use because of low volume. However, according to the present invention, the PTT terminal 1 includes the PTT button 112, the PTT microphone, and the PTT speaker, thereby solving the above-described problem.

4 is a detailed configuration diagram of the PTT terminal of FIG. 3 according to an embodiment of the present invention.

3 and 4, the PTT terminal 1 includes a control unit 10, an input unit 11, an output unit 12, an amplification unit 13, a communication unit 14, a power supply unit 15, a battery 16 A clock supply section 17, a memory 18, a micro USB port 19, and a charging section 20.

The input unit 11 according to an embodiment includes a PTT microphone 110, a PTT button 112, and a volume button 114. The PTT microphone 110 receives voice from the user. The PTT button 112 is keyed or unlocked by the user. The PTT microphone 110 can receive a voice from the user when the PTT button 112 is pressed. The volume button 114 adjusts the volume during a voice call. The volume button 114 can be configured with a volume UP button and a volume down button, and a volume up button can be used with the power button (Volume UP / Power). In this case, the power is turned on / off by pressing the volume up button for a preset time, for example, 3 seconds or more, and the volume is turned up by pressing the button for a short time.

The output unit 12 according to an embodiment includes a PTT speaker 122 and a light emitting unit 124. The PTT speaker 122 outputs a voice signal to the user. The PTT speaker 122 may output a voice signal to the user when the PTT button 112 is pressed. The light emitting unit 124 displays the Bluetooth connection state and the battery state through light emission. The light emitting portion 124 may be any means for emitting light such as an LED, a beacon or the like. In the operation process of the light emitting unit 124, for example, a green LED is used for pairing, a green LED is blinked when pairing, and a green LED is turned on when the Bluetooth is connected , The green LED turns off when the Bluetooth connection is disconnected. Also, the battery is charged using the red LED, the red LED is turned on during charging, and the red LED is turned off when charging is completed. However, the above-described embodiments are only for the purpose of helping understanding of the present invention, and the method of emitting light by the light emitting unit 124 according to the Bluetooth connection state or the battery state can be variously modified.

The amplifying unit 13 amplifies the voice signal received through the PTT microphone 110 and transmits the amplified voice signal to the communication unit 14. [ The communication unit 14 connects the PTT terminal 1 and the mobile terminal 2 via the Bluetooth method, which is one of the short-range wireless communication methods. When receiving a voice signal through the PTT microphone 110 in the call mode, the communication unit 14 processes the signal and transmits the voice signal to the Bluetooth-connected portable terminal 2. When receiving the voice signal from the Bluetooth-connected portable terminal 2, And transmits the signal to the PTT speaker 122. The call mode can be determined by a control signal according to key input or release through the PTT button 112. [ For example, when the PTT button 112 is pressed, the user enters the communication mode. When the PTT button 112 is released, the communication mode is terminated.

When the communication unit 14 enters the communication mode, the communication unit 14 transmits a first control signal to the Bluetooth-connected portable terminal 2 to activate the communication function through the wireless communication network of the portable terminal 2 by the first control signal. At this time, the communication function of the portable terminal 2 via the wireless communication network includes a voice call and a text message transmission / reception. When the communication mode ends, the second control signal is transmitted to the Bluetooth-connected portable terminal 2 to disable the communication function through the wireless communication network of the portable terminal 2 by the second control signal.

The communication unit 14 includes a digital signal processor (DSP) 140, a filter 142, a radio frequency (RF) processor 144, and an antenna 146 do. The process of transmitting a voice signal input through the PTT microphone 110 is as follows. The DSP 140 having the codec function digitizes the voice signal input through the PTT microphone 110, and the filter 142 extracts the baseband signal from the digitized voice signal. The RF processor 144 modulates and converts the extracted baseband signal into a high frequency signal, and the antenna 146 transmits the converted high frequency signal to the portable terminal 2 as a Bluetooth signal. The process of receiving a voice signal from the portable terminal 2 is as follows. The antenna 146 receives a high frequency signal from the portable terminal 2 as a Bluetooth signal, and the RF processor 144 demodulates and converts the high frequency signal into a baseband signal. The DSP 140 converts the converted baseband signal into an analog signal and transmits it to the PTT speaker 122.

The power supply unit 15 is supplied with power, and can receive power of the vehicle by using a cigar jack cable. The memory 18 stores data necessary for executing the IP-PTT application of the portable terminal 2 and data generated during execution of the IP-PTT application. Memory 18 may include, but is not limited to, ROM 180, RAM 182, EEPROM 184, and the like, as shown in FIG. The EEPROM 184 stores a bluetooth address and nonvolatile data. The configuration including the communication unit 14, the memory 18, and the control unit 10 may be manufactured in the form of a Bluetooth chip. The clock supply unit 17 supplies a clock to the Bluetooth chip.

The micro USB port 19 is connected to the portable terminal 2. The charging unit 20 charges the battery 16 through the micro USB port 19 under the control of the power supply unit 15 or directly charges the battery 16 using the portable terminal charger. The battery 16 according to one embodiment is a Li-ion battery capable of providing a service of 12 hours or more at the time of a call and 72 hours or more at a standby time.

The control unit 10 controls operation of the PPT terminal 1 and signal transmission and reception so that the Bluetooth connection with the portable terminal 2 through the communication unit 14 is controlled and voice communication is performed using the Bluetooth- Provide PTT service including. The controller 10 generates a first control signal and transmits the generated first control signal to the portable terminal 2 through the communication unit 14. [ The portable terminal 2 is activated by the first control signal through the wireless communication network of the portable terminal. The control unit 10 generates a second control signal when the call mode is terminated and transmits the generated second control signal to the portable terminal 2 through the communication unit 14. [ The portable terminal 2 is disabled in the communication function via the wireless communication network of the portable terminal 2 by the second control signal.

5 is a configuration diagram of a PTT service providing system according to an embodiment of the present invention.

5, the PTT service providing system includes a PTT terminal 1, a mobile terminal 2, a base station 3, a wireless communication network 4, a PTT server 5, and an operator terminal 6, .

The PTT terminal 1 is connected to the portable terminal 2 via Bluetooth. When the PTT terminal 1 is Bluetooth-connected to the portable terminal 2, the PTT terminal 1 receives a communication function via the wireless communication network 4 of the portable terminal 2 from the portable terminal 2. At this time, the PTT terminal 1 can transmit / receive a voice signal transmitted / received through the PTT microphone and the speaker of the PTT terminal 1 to / from the PTT server 5 and the dispatcher terminal 6 using the wireless communication network 4 have.

The portable terminal 2 transmits / receives a control signal to / from the Bluetooth-connected PTT device 1 and activates a communication function through the wireless communication network 4 in accordance with the control signal. The communication function includes a voice call and a text message transmission / reception. The portable terminal 2 may have an IP-PTT app installed or may be downloaded. The portable terminal 2 can be connected to the wireless communication network 4 through the base station 3. [ The wireless communication network 4 uses a method of communicating packet data over the Internet or the like.

The PTT service provided by the PTT device 1 using the Bluetooth-connected portable terminal 2 can be applied to a call service for providing call information to a driver of a cargo truck or a call taxi when requesting a dispatch from a customer. However, the present invention is not limited to the call service of the driver. For example, it may be used as a business communication or instruction delivery means for employees who are traveling or working at a retailer, a construction company, a news agency, a hospital, etc. through the wireless communication network 4. Hereinafter, the configurations of the PTT server 5 and the dispatcher terminal 6 that provide call services will be described below.

The PTT server 5 registers the Bluetooth-connected PTT terminal 1 in the portable terminal 2. At the time of registration, the PTT server 5 acquires driver information and vehicle information which are the users of the PTT terminal 1. [ The acquired information can be provided to the dispatcher terminal 6.

The dispatcher terminal 6 stores the GPS position information of the real-time vehicle, the vehicle information on which the dispensing information is transmitted, and the information of the actually dispensed vehicle in the database. In addition, the GPS position data periodically received from the GPS device of the vehicle to be dispatched is stored in the database, and the position information of the vehicle is updated in real time every time the position information is received. When the dispatcher terminal 6 receives the dispatch request information of the customer, the dispatcher terminal 6 selects the dispatch vehicle according to the location information of the customer. Then, dispatch guidance information is transmitted to the terminal of the selected dispatch vehicle. The dispatch guidance information may be transmitted in the form of a voice signal or a text message (SMS). When the dispatch vehicle receiving the dispatch information responds, dispatch processing is performed, and when the dispatch is completed, the corresponding history information is recorded in the database.

In FIG. 1, although the PTT server 5 and the dispatcher terminal 6 are separately shown as devices, they may be integrated, and some functions may be compatible with each other.

An in-vehicle driver having the PTT terminal 1 Bluetooth-connects his or her portable terminal 2 and the PTT terminal 1 to the PTT server 5 and the PTT server 5 via Bluetooth connection, An embodiment in which the PTT service is provided from the dispatcher terminal 6 will be described below.

4 and 5, the in-vehicle driver turns on the power of the PTT terminal 1 from the vehicle through the power supply unit 15 of the PTT terminal 1 and transmits the power of the PTT terminal 1 to the portable terminal 2 using the communication unit 14. [ And Bluetooth. When the driver presses the PTT button 112 of the PTT terminal 1 while the portable terminal 2 is connected with Bluetooth, the control unit 10 recognizes the PTT button pressing information and generates a first control signal And transmits it to the communication unit 14. The communication unit 14 transmits the first control signal to the IP-PTT app of the portable terminal 2 and the portable terminal 2 activates the calling function through the wireless communication network 4 from the first control signal. At the time of activating the call function, the user can make a voice call with the dispatcher terminal 6 through the PTT terminal 1. [ At this time, the voice signal inputted from the PTT terminal 1 is transmitted to the dispatching terminal 6 through the portable terminal 2 or the voice signal inputted through the dispatching terminal 6 is transmitted through the portable terminal 2 to the PTT And transmitted to the terminal 1. The communication between the PTT terminal 1 and the dispatcher terminal 6 uses the wireless communication network 4 of the portable terminal 2. On the other hand, when the PTT button 112 is released by the user, the communication between the PTT terminal 1 and the dispatching terminal 6 is terminated.

6A and 6B are flowcharts illustrating a method of providing a PTT service according to an embodiment of the present invention.

Referring to FIG. 6A, when the PTT terminal 1 receives power from the vehicle, the power is turned on (600). The green LED may flash when the power is turned on. The mobile terminal 2 searches for a PTT terminal to be Bluetooth-connected 604 via Bluetooth pairing 602, registers the found PTT terminal 1 and establishes Bluetooth connection (606). When the Bluetooth connection is established, the green LED of the PTT terminal 1 is turned on to maintain the ON state (608). The PTT terminal 1 must be registered in the portable terminal 2 through the Bluetooth pairing 602 for the first time and then the PTT terminal 1 automatically connects the registered PTT terminal 1. [ If the Bluetooth connection is lost, the green LED can be turned off.

The dispatcher terminal 6 registers 610 in the PTT server 5 and the portable terminal 2 executes the IP-PTT application and registers the service in the PTT server 5 via the wireless communication network 612 . The PTT server 5 transmits the registered service status and group information to the mobile terminal 2 (614).

When the dispatcher terminal 6 is registered (610) in the PTT server 5 and provides the IP-PTT service with the portable terminal 2 in a 1: 1 manner, when the driver presses the PTT button of the PTT terminal 1 616, and transmits a Play event message to the portable terminal 2 as an audio / video remote control profile (AVRCP) as a control signal (618). The portable terminal 2 transmits to the PTT server 5 a message requesting PTT connection to the dispatch terminal 6 by the Play event message 620 and the PTT server 5 transmits a PTT connection request message to the dispatcher terminal 6 (622). The dispatcher terminal 6 having received the PTT connection request message transmits a connection response to the PTT server 5 624 and the PTT server 5 transfers the connection response to the portable terminal 2 625, (2) approves the connection to the PTT terminal 1 (626). The control signal generated by pressing the PTT button is not limited to the AVRCP method. For example, a serial port profile (SPP) or the like may be used.

If the connection is approved, the PTT terminal 1 can make a voice call with the dispatcher terminal 6 (628). The PTT terminal 1 transmits a voice signal to the Bluetooth-connected portable terminal 2 and the portable terminal 2 transmits the voice signal to the Bluetooth- Converts the received voice signal into a packet data form via a wireless communication network, transfers it to the dispatch terminal 6, and outputs it through the dispatch terminal 6. The voice signal is converted into the packet data form through the wireless communication network of the portable terminal 2 and is transmitted to the portable terminal 2 and the portable terminal 2 Transmits the voice signal to the PTT terminal 1 and is reproduced through the PTT speaker of the PTT terminal 1. [

The IP-PTT service includes not only voice communication but also transmission and reception of text messages through the portable terminal 2. [ In this case, a text message is displayed on the screen through the IP-PTT application of the portable terminal 2. [ The dispatcher terminal 6 transmits the dispatch information to the PTT terminal 1 through communication with the dispatcher terminal 6 and transmits the dispatch response information to the dispatcher terminal 6 when the driver receiving the dispatch information , The dispatcher terminal 6 performs dispatch processing and records the history information in the database when dispatch is completed.

6B, when the driver releases the pressed PTT button of the PTT terminal 1 (630), the PTT terminal 1 transmits a Stop event message to the portable terminal 2 as the control signal AVRCP (632 ). The portable terminal 2 transmits to the PTT server 5 a message requesting the PTT server 5 to release the PTT connection to the dispatch terminal 6 by the Stop event message and the PTT server 5 sends a PTT connection release request message To the real terminal 6 (636). The dispatcher terminal 6 having received the PTT connection cancellation request transmits the connection cancellation response to the PTT server 5 at step 638 and the PTT server 5 transfers it to the portable terminal 2 at step 640, The portable terminal 2 confirms the disconnection to the PTT terminal 1 (642). Thereby, the communication between the PTT terminal 1 and the dispatcher terminal 6 is terminated (644). The control signal generated when the PTT button is released is not limited to the AVRCP method. For example, a serial port profile (SPP) or the like may be used.

The embodiments of the present invention have been described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

1: PTT terminal 2: portable terminal
3: base station 4: wireless communication network
5: PTT server 6:
10: control unit 11:
12: output section 13: amplification section
14: communication unit 15:
16: Battery 17: Clock supply section
18: Memory 19: Micro USB port
20: charger 110: PTT microphone
112: PTT button 114: Volume button
122: PTT speaker 124:
140: digital signal processor 142: filter
144: RF processor 146: antenna

Claims (12)

A PTT (Push To Talk) microphone for receiving a voice signal;
A PTT speaker for outputting a voice signal;
And transmits the voice signal received through the PTT microphone in the call mode after the Bluetooth connection to the portable terminal and receives the voice signal from the portable terminal. A communication unit for transmitting to the PTT speaker; And
A controller for controlling a Bluetooth connection with the portable terminal through the communication unit and providing a PTT service including a voice call using a Bluetooth-enabled portable terminal;
And the PTT terminal. The method of claim 1, wherein the PTT terminal
A PTT button that is keyed or released by the user; Further comprising:
When the PTT button is pressed, enters a communication mode in which a voice signal can be transmitted and received, and when the PTT button is released, the call mode is terminated. The apparatus of claim 1, wherein the control unit
When the mobile terminal enters the communication mode, generates a first control signal and transmits the generated first control signal to the mobile terminal through the communication unit, activates a communication function through the wireless communication network of the mobile terminal by the first control signal, When the mode is terminated, a second control signal is generated and the generated second control signal is transmitted to the portable terminal through the communication unit, and the communication function through the wireless communication network of the portable terminal is deactivated by the second control signal PTT terminal. The method of claim 3,
Wherein the first control signal and the second control signal are transmitted to a mobile terminal using an AVRCP (Audio / Video Remote Control Profile). The method of claim 3,
Wherein the communication function through the wireless communication network of the portable terminal includes a voice call and a text message transmission / reception. The communication device according to claim 1,
A digital signal processing unit for digitizing a voice signal input through the PTT microphone or for converting the converted baseband signal into an analog signal and transmitting the analog signal to the PTT speaker;
A filter for extracting a baseband signal from the digitized speech signal;
An RF processor for modulating and converting the extracted baseband signal into a high frequency signal or demodulating and converting a high frequency signal into a baseband signal; And
An antenna for transmitting the converted high-frequency signal to the portable terminal as a Bluetooth signal, or receiving a high-frequency signal as a Bluetooth signal from the portable terminal;
And the PTT terminal. The method of claim 1, wherein the PTT terminal
A power supply unit that receives power from the vehicle;
battery;
A micro USB port connected to the portable terminal; And
A charging unit charging the battery through the micro USB port under the control of the power unit or charging the battery using a portable terminal charger;
Wherein the PTT terminal further comprises: The method of claim 1, wherein the PTT terminal
A light emitting unit for displaying a Bluetooth connection state and a battery state through light emission;
Wherein the PTT terminal further comprises: The PTT terminal is Bluetooth-connected with the portable terminal;
Registering a service with a Bluetooth-connected mobile terminal in a PTT server;
The PTT terminal receives a PTT button key from a user and transmits a first control signal to the portable terminal;
Requesting a portable terminal to access a dispatcher terminal through a PTT server by a first control signal and receiving a connection response from the dispatcher terminal via a PTT server;
The mobile terminal having received the connection response approves the connection to the PTT terminal; And
Communicating with the POE terminal through the portable terminal;
And transmitting the PTT service. The method as claimed in claim 9, wherein the step of the PTT terminal communicating with a terminal
The PTT terminal receives the voice through the PTT microphone and transmits the voice signal to the Bluetooth-connected portable terminal, and the portable terminal transmits the received voice signal to the terminal in the form of packet data through the wireless communication network; And
When the dispatcher terminal receives the voice and transmits the voice signal to the portable terminal through the wireless communication network in the form of packet data, the portable terminal transmits the voice signal to the Bluetooth-connected PTT terminal, and the PTT terminal transmits the received voice signal to the PTT Outputting through a speaker;
And transmitting the PTT service. The method of claim 9, wherein the PTT service providing method comprises:
The portable terminal connected to the dispatcher terminal receives the text message from the dispatcher terminal and displays it;
Further comprising the steps of: The method of claim 9, wherein the PTT service providing method comprises:
Transmitting a second control signal to the portable terminal in response to the PTT terminal releasing the PTT button key input;
Requesting the portable terminal to disconnect from the dispatching terminal through the PTT server by the second control signal and receiving the disconnection response from the dispatching terminal via the PTT server; And
The communication between the PTT terminal and the dispatcher terminal is released as the portable terminal that has received the disconnection response confirms the disconnection to the PTT terminal;
Further comprising the steps of:

Images