KR20080064435A - Voice relay walkie-talkie and voice relay system using the walkie-talkie - Google Patents

Abstract

A voice relay radiotelegraph and a voice relay system using the same are provided to overcome the limitation of communication distance by implementing the communication through the voice relay radiotelegraph, thereby expanding the communication distance practically. A voice relay system comprises a radio transmitter(1), a relay radiotelegraph(2) and a radio receiver(3). The radio transmitter requires the relay for voice signals through the relay radiotelegraph. The relay radiotelegraph transmits the requested voice signals to the radio receiver when the radio transmitter requests the relay for the voice signals. The radio receiver transmits a receipt confirming signal for informing the receipt of the voice signal to the radio transmitter through the relay radiotelegraph when receiving the voice signals of the radio transmitter through the relay radiotelegraph.

Description

VOICE RELAY WALKIE-TALKIE AND VOICE RELAY SYSTEM USING THE WALKIE-TALKIE}

1 is a diagram schematically showing an operating state of a walkie talkie voice relay system according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating an example of a circuit block of the relay transceiver of FIG. 1.

3 is a diagram illustrating an example of a CTCSS code number;

4 is a diagram illustrating an operation flow of a walkie talkie voice relay system according to an exemplary embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1: transmitting radio 2: repeating radio

3: receiving radio 10: duplexer

12: receiving amplifier 14: mixer (Mixer)

16: local oscillation unit 18: intermediate frequency signal processing unit

26: CTCSS detection unit 20: switch unit

22: first audio filter 24: audio amplifier

36: microphone 38: frequency oscillator

40: CTCSS generator 42: modulator

44: transmission amplifier 46: PTT switch

28: second audio filter 32: analog-to-digital converter

34: first memory 35: second memory

31: key input unit 30: control unit

25: Speaker

The present invention relates to a voice relay and a voice relay system using the same, and more particularly, to a voice relay and a voice relay system for transmitting a voice signal transmitted from another radio to another radio.

In general, the radio is capable of transmitting signals in two directions between two communicating points. However, when a signal is sent from one point, only the signal can be received at another point. It uses a communication method of PTT (Push To Talk) function that needs to explicitly change the transmission direction by using.

In the case of the Family Radio Service (FRS), which is the most widely used among these PTT radios, the 27 MHz (vehicle use) or the ultra high frequency (UHF) in the 448 MHz or 462 MHz band allocated freely without paying a radio wave fee is used. It is mainly used, and its radio wave communication distance is within 3 km.

In the case of commercial radios, the frequency of ultra high frequency (VHF) or ultra high frequency (UHF) is to be paid for a certain amount, and the radio communication range is formed within 10 km to 20 km. But the cost is cheaper than cell phones.

In addition, such a living radio and a work radio (hereinafter referred to as "portable radios") have a smaller time difference between when a call is made by a sender and when a call is received by a receiver than a mobile phone. In other words, the mobile phone speaker on the receiving end can hear the caller's voice in a short time, for example, when a call is made by pressing a portable radio PTT on the calling side without having to make a call and ring a bell like a mobile phone.

As such, portable radios have a growing population due to their low cost and ease of use. However, since these portable radios can communicate only within the communication range of the radio wave, there is a disadvantage that there is no way to communicate with the radio located outside the communication range.

In addition, even if within the communication distance there is a problem that communication between the radio is not made even if the radio wave is blocked by various obstacles.

Accordingly, the present invention has been made to solve the above-mentioned problems and disadvantages, the object of the voice signal to enable a smooth communication between the radios that can not communicate with each other due to limitations or obstacles of radio communication distance It is to provide a voice relay radio for performing a relay and a voice relay system using the same.

In order to achieve the above object, a walkie-talkie voice relay system according to the present invention includes a transmitting radio for requesting the relay of a voice signal to a relay radio performing a relay function; A relay radio for transmitting the requested voice signal to a receiving radio when the transmission of the voice signal is requested from the transmitting radio; When receiving the voice signal of the transmitting radio via the relay, it comprises a receiving radio for transmitting a reception confirmation signal indicating the reception of the voice signal to the transmitting radio through the relay.

In addition, in order to achieve the above object, the voice relay radio according to the present invention is a voice relay for relaying communication between a transmitting radio and a receiving radio, wherein a relay request for detecting a relay request of a voice signal transmitted from the transmitting radio A detector; A storage unit for storing the voice signal; When a relay request of the voice signal is detected from the relay request detector, the voice signal included in the relay request of the voice signal is stored in the storage unit, and the voice signal stored in the storage unit is transmitted to the receiving radio. And a controller configured to control the reception acknowledgment signal to be transmitted to the transmission radio when receiving an acknowledgment signal indicating that the voice signal has been received from the reception radio according to the transmitted voice signal.

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

The walkie talkie voice relay system according to an embodiment of the present invention includes a transmission walkie talkie 1, a relay walkie talkie 2, and a reception walkie talkie 3 as shown in FIG.

Here, the transmission radio 1 is a radio for transmitting a voice signal, the reception radio 3 is a radio for receiving a voice signal and the relay radio 2 relays the communication between the transmission radio 1 and the reception radio 3. It's a radio.

In the present embodiment, the transmission radio 1 and the relay radio 2 can communicate wirelessly within the first transmission range 4 of radio waves, and the relay radio 2 and the reception radio 3 communicate the second radio waves. The following describes an example in which a radio communication is possible within the range (5), and direct communication is impossible between the transmitting radio (1) and the receiving radio (3) because it is out of the communication range of radio waves.

As shown in FIG. 1, when the transmitting radio 1 transmits a voice signal to the receiving radio 3, the receiving radio 3 does not communicate directly with the receiving radio 3 where the radio communication distance is exceeded. Asks the user to relay the voice signal.

When receiving the request for the relay of the voice signal from the transmitting radio 1, the relay transceiver 2 stores the requested voice signal in a predetermined storage and transmits the corresponding voice signal to the receiving radio 3.

On the other hand, the reception radio (3) transmits an acknowledgment signal to the relay radio (2) indicating that the reception when receiving a voice signal relayed and transmitted from the relay radio (2). Accordingly, the relay radio 2 transmits an acknowledgment signal to the transmission radio 1 to inform that the reception radio 3 normally receives a voice signal.

This enables communication between the transmitting radio 1 and the receiving radio 3 that are not within the radio wave communication range.

Hereinafter, the function of the relay radio 2 of FIG. 1 will be described in detail with reference to FIG. 2.

As shown in FIG. 2, the relay transceiver 2 according to the embodiment of the present invention includes a duplexer 10, a reception amplifier 12, a mixer 14, and a local oscillator 16. , Intermediate frequency signal processor 18, CTCSS detector 26, switch unit 20, first audio filter 22, audio amplifier 24, microphone 36, frequency oscillator 38, CTCSS generator 40, modulator 42, transmit amplifier 44, PTT switch 46, second audio filter 28, analog-to-digital converter 32, first memory 34, key input unit ( 31), and the control unit 30 of the second memory 35.

The duplexer 10 outputs the RF signal received from the antenna to the reception amplifier 12, and transmits the RF signal transmitted from the transmission amplifier 44 to the antenna side to radiate.

The reception amplifier 12 amplifies the RF signal received through the duplexer 10, and the mixer is a local oscillation frequency supplied from the local oscillation unit 16 and the RF signal amplified by the reception amplifier 12 Mix and convert to an intermediate frequency signal. This conversion to the intermediate frequency signal is to increase the selectivity of the frequency.

The intermediate frequency signal processor 18 processes the intermediate frequency signal generated through the mixer 14 to extract an audio signal, and the extracted audio signal to the switch unit 20 and the CTCSS detector 26 to be described later. To pass.

The CTCSS detector 26 detects the CTCSS tone frequency from the audio signal extracted by the intermediate frequency signal processor 18 and transmits the CTCSS tone frequency to the controller 30 to be described later. This is, for example, to prevent power wastage by outputting only the signal matching the preset tone frequency to the speaker 25. In addition, the CTCSS detector 26 notifies the control unit 30 of the specific pattern of the tone frequency to analyze predetermined information such as a relay request code transmitted from the transmission radio 1.

The switch unit 20 performs an on / off process so that the audio signal processed by the intermediate frequency signal processing unit 18 is output to at least one of the first audio filter 22 and the second audio filter 28. Here, the switch unit 20 is turned on / off by the control signal of the control unit 30 according to the tone frequency detected by the CTCSS detection unit 26.

The audio signal passed through the first audio filter 22 is output through the speaker 25 after the signal is amplified through the audio amplifier 24, and the audio signal passed through the second audio filter 28 is analog. It is output to the digital conversion unit 32.

Here, the analog-to-digital converter 32 converts an analog signal into a digital signal or converts a digital signal into an analog signal under the control of the controller 30 to be described later, and may use a compression algorithm during the conversion. That is, the analog-digital converter 32 compresses and converts an analog signal input from the second audio filter 28 into a digital signal, and stores the analog signal in the first memory 34 to be described later. The stored compressed digital signal is converted into an analog signal so that it can be transmitted to the frequency oscillator 38 to be described later. Since a technology for converting and compressing a voice signal into a digital signal is well known, a detailed description thereof will be omitted.

As described above, the first memory 34 is a place where the audio signal passed through the second audio filter 28 and the analog-digital converter 32 is stored in a digital format, and the stored information remains even when the power is turned off. It is preferable that the nonvolatile memory is provided.

The key input unit 31 is provided in the form of a button so that the user can set whether to operate the relay function of the radio. That is, the user may select whether the radio performs a relay function through a button operation of the key input unit 31.

The second memory 35 stores various setting states used by the control unit 30 and necessary programs, including a setting state of whether the relay function of the radio set according to the key input unit 31 is operated. Here, the first memory 34 and the second memory 35 are divided for the purpose of explanation, but one region of the same memory may be used as the first memory 34 and the second memory 35.

On the other hand, the frequency oscillator 38 is a CTCSS generated from the CTCSS generating unit 40 to the voice signal of the first memory 34, which is transmitted through the voice signal of the user or the analog-digital change unit input from the microphone 36, the phone Output by combining with tone frequency.

The modulator 42 modulates the synthesized signal of the voice signal and the CTCSS tone frequency to a frequency capable of wireless transmission and outputs the modulated signal.

The transmission amplifier 44 amplifies and transmits the modulated transmission frequency signal through the modulator 42 to the duplexer 10, and the user uses the switching function of the PTT switch 46 during transmission. The transmit frequency signal is transmitted through the antenna. Here, the transmission amplifier 44 may select the operation of the PTT switch 46 according to a control signal (not shown) of the controller 30. That is, the transmission amplifier 44 transmits the voice signal input from the microphone 36 only when the PTT switch 46 is pressed, and the PTT switch when the voice signal stored in the memory is to be transmitted. (46) can be sent regardless of operation.

When the controller 30 determines that the relay request of the voice signal is received as a result of analyzing the tone frequency detected by the CTCSS detector 26, first, the controller 30 accesses the second memory 35 and checks the setting state. When it is set to perform a relay function as a result of checking the setting state, the control unit 30 stores the voice signal included in the relay request of the voice signal through the second audio filter 28 in the first memory 34. 20 and the analog-to-digital converter 32 are controlled.

The relay request of the voice signal is, for example, a signal transmitted from a receiving radio 3 to communicate with and a transmitting radio 1 located at a position outside the radio communication distance, and the voice signal to be transmitted to the relay request of the voice signal. And a relay request code for requesting relay of the voice signal.

In this case, the relay request code may be formed in a pattern of repeatedly transmitting at least two of different CTCSS codes repeatedly. For example, the transmitting radio may alternately transmit two preset CTCSS codes among the CTCSS codes shown in FIG. 3 together with the voice signal to be transmitted, and the control unit 30 of the relay radio 2 detects from the CTCSS detecting unit 26. By analyzing the CTCSS code pattern, it is possible to determine whether the signal is a request for relaying a voice signal.

In addition, the relay request of the voice signal may further include a transmission radio unique number specifying the transmission radio (1), and a reception radio unique number specifying the reception radio (3). The unique number of the transmitting radio and the unique number of the receiving radio are information required when the transmitting radio 1 and the receiving radio 3 want to perform 1: 1 communication. In other words, if you want to specify the target of communication among a large number of radios using the same frequency band, it is possible to utilize the above-mentioned transmit radio unique number and receive radio unique number. The transmission radio unique number and the reception radio unique number may be transmitted using a repeating pattern of the CTCSS tone frequency, but the transmission radio 1 includes a character transmission unit (not shown) for transmitting information in the form of a character. In addition, the transmitting unit may transmit the unique number of the transmission radio and the unique number of the receiving radio. In this case, the relay radio 2 may further include a character extracting unit (not shown) capable of extracting a transmitting radio unique number and a receiving radio unique number in a character form and transmitting the extracted radio number to the control unit 30. The transmit radio unique number and the receive radio unique number extracted by this may be stored in the second memory 35 for later use.

Meanwhile, the controller 30 stores the voice signal in the first memory 34, and then the stored voice signal is converted into an analog signal through the analog-to-digital converter 32 and transmitted to the reception transceiver 3. Control as possible. Here, the control unit 30 may transmit the voice signal stored in the first memory 34 after a predetermined time passes by using a timer (not shown) provided in the control unit 30, and further, the relay transceiver 2 You can also wait when the) is not used. In this case, the control unit 30 may transmit the transmission radio unique number and the reception radio unique number together with the voice signal.

Here, when the reception radio 3 receives the voice signal relayed and transmitted from the relay radio 2, the reception radio 3 transmits an acknowledgment signal indicating the reception of the voice signal to the relay radio 2. Here, the acknowledgment signal may be configured in the form of at least two repeating patterns of the CTCSS codes shown in FIG. 3, wherein the CTCSS codes are detected by the CTCSS detection unit 26 to control the control unit 30 of the relay transceiver 2. Is sent). In response to the acknowledgment signal, the control unit 30 deletes the received audio signal from the reception radio 3 from the first memory 34, and transmits the acknowledgment signal to the transmission radio 1 again. To control.

Even when the acknowledgment signal is not received from the reception transceiver 3 for a predetermined time, the controller 30 may delete the voice signal stored in the first memory 34. This is to secure a space for additionally storing a voice signal to be transmitted.

Hereinafter, an operation flow of the radio relay system according to an embodiment of the present invention will be described in detail with reference to FIG. 4.

First, the transmitting radio 1 performs a necessary setting when requesting a voice relay to the relay radio 2 (S10). The necessary setting includes setting of a relay request code for requesting relay of a voice signal. In the case of 1: 1 communication by specifying the radio, setting of the transmission radio unique number specifying the transmission radio 1 and the reception radio identification number specifying the reception radio 3 may be further included.

In this case, the relay request code may be configured in the form of a repeating pattern of at least two CTCSS codes, and the transmit radio unique number and the receive radio unique number may be configured in character form.

When the voice signal relay request including the voice signal is performed together with the set information (S11), the relay transceiver 2 receiving the request for the relay of the voice signal analyzes the relay request code and confirms that the relay request signal is performed (S12). .

At this time, the relay transceiver 2 determines whether the relay allow mode is set (S13). If it is determined that the relay allow mode is not set, the relay radio 2 terminates the relay request signal received from the transmission radio 1 (S14).

If it is determined that the relay allow mode is set, the relay transceiver 2 converts the voice signal included in the relay request of the voice signal into a digital signal and stores it in the first memory 34 (S15).

After the reception from the transmission radio 1 is completed, the relay radio 2 converts the voice signal stored in the first memory 34 into a digital signal and transmits the signal to the reception radio 3 (S16), where the reception radio 3 The signal transmitted to may further include a transmit radio unique number and a receive radio unique number. When the signal transmitted to the receiving radio 3 does not include the transmitting radio unique number and the receiving radio unique number, the relay radio 2 is relayed and transmitted to the receiving radio 3 using the repeating pattern of the CTCSS code. Can be informed.

When the reception radio 3 confirms that the received voice signal is relayed and transmitted (S18), the reception radio 3 transmits an acknowledgment signal (ACK signal) indicating that the reception is normal to the relay radio 2 (S19). In this case, the transmission radio unique number and the reception radio unique number received from the relay 2 may be included in the acknowledgment signal (ACK signal).

On the other hand, when the relay transceiver 2 receives the ACK signal from the reception radio 3 (S19) or does not receive the ACK signal for a predetermined time (S17), the reception radio of the voice signal stored in the first memory 34 The voice signal transmitted to (3) is deleted (S20).

In addition, when the relay radio 2 receives an ACK signal from the reception radio 3 (S21), the relay radio 2 transmits the ACK signal to the transmission radio 1 (S22). A notice is displayed (S23) so that the user of the transmitting radio 1 can know.

In the above, a process of transmitting a voice signal from the transmitting radio 1 to the receiving radio 3 via the relay radio 2 has been described. In response to the voice signal transmission of the transmission radio 1, a process of transmitting a voice signal from the reception radio 3 to the transmission radio 1 via the relay radio 2 may also correspond to the above-described process.

Although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that the invention may be modified without departing from the spirit or spirit of the invention. . It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

As described above, according to the present invention, when communicating with a radio located outside a radio communication distance, or when communicating with a radio located in an area where communication is impossible due to reflection characteristics of a radio wave, a communication is performed through a relay radio. It is possible to overcome the limitation of the, substantially has the effect of extending the communication range.

Claims (7)

A transmission radio for requesting relay of a voice signal to a relay radio performing a relay function; A relay radio for transmitting the requested voice signal to a receiving radio when the transmission of the voice signal is requested from the transmitting radio; When receiving a voice signal of the transmitting radio through the relay radio, a radio transceiver comprising a reception radio for transmitting a reception confirmation signal indicating the reception of the voice signal to the transmitting radio through the relay radio system. The method of claim 1, The request for relaying the voice signal transmitted by the transmitting radio includes a voice signal to be transmitted, a relay request code for requesting relay of the voice signal, a transmission radio unique number for specifying the transmission radio, and a reception radio. The receiving radio unique number, And the relay radio transmits the transmission radio unique number and the reception radio unique number together when the relay signal is to be transmitted to the reception radio by relaying the voice signal. The method of claim 2, The relay request code is a walkie talkie voice relay system, characterized in that consisting of a pattern for repeatedly transmitting at least two of the different CTCSS code. In the voice relay radio for relaying communication between a transmitting radio and a receiving radio, A relay request detector for detecting a relay request of a voice signal transmitted from the transmission radio; A storage unit for storing the voice signal; When a relay request of the voice signal is detected from the relay request detector, the voice signal included in the relay request of the voice signal is stored in the storage unit, and the voice signal stored in the storage unit is transmitted to the receiving radio. And a controller configured to control the reception acknowledgment signal to be transmitted to the transmission radio when receiving an acknowledgment signal indicating that the voice signal has been received from the reception radio according to the transmitted voice signal. . The method of claim 4, wherein And the controller deletes the voice signal stored in the storage unit when the acknowledgment signal is not received from the reception radio for a predetermined time. The method of claim 5, It further includes a relay allow mode setting unit for setting whether or not to operate the relay function, The control unit determines whether a relay function is set to be activated by the relay allow mode setting unit when a relay request of a voice signal transmitted by the transmitting radio is detected from the relay request detector, and determines that the relay function is operated. And the voice signal is transmitted to the reception radio when set. The method of claim 6, An analog-digital converting unit for converting an analog signal into a digital signal and converting the digital signal into an analog signal, The control unit controls the analog-digital converter to convert the voice signal into a digital signal when storing the voice signal received from the transmitting radio into the storage unit, and transmits the signal stored in the storage unit to the receiving radio. If you want to control the analog-to-digital converter to the voice signal stored in the storage unit is a voice relay, characterized in that the control to convert to an analog signal.

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