JPH10224489A - Radio call device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the simultaneous calls of plural persons between a master device and plural slave units and to improve the convenience of a radio call device in a simple constitution by adding plural interface parts corresponding to the number of repeaters to a control part together with a voice mixture means which mixes the voice signals received from the interface parts with those received from a microphone of the master device. SOLUTION: In this radio call device 1, a master device 2 is connected to the repeaters 3 via the wire circuits and the radio communication is performed between repeaters 3 and slave units 4. A control part 6 of the device 2 includes a voice mixture means which mixes plural voice signals together and plural interface parts which separate the voice signals received from the units 4 from those sent to the units 4. Then the part 6 supplies the up voice signals received from the units 4 via the repeaters 3 to a speaker and also mixes these up voice signals with the voice signals received from a microphone to supply them the units 4 as the down voice signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication device capable of communicating by wirelessly communicating between a master device and a slave unit.
In particular, the present invention relates to a wireless communication device that allows simultaneous communication between a master device and a plurality of slave units.

[0002]

2. Description of the Related Art In a conventional wireless communication device, a master device installed in a control room or the like, a transponder arranged on a ceiling or a wall of a venue, a clerk of a venue such as an entertainment venue, a playground, etc.
Or a plurality of slaves carried by security guards, etc.
It is known that a command from a master device can be simultaneously transmitted wirelessly to a plurality of slave devices via a repeater, or an arbitrary one of the slave devices can be called from the master device to make a call.

[0003] Such a conventional radio communication device uses a specified low power radio, transmission power is 10 mW or less, and 18 channels of 420/440 MHz band are allocated to a communication frequency.

FIG. 9 shows an overall configuration diagram of a conventional wireless communication device. In FIG. 9, a conventional wireless communication device 50 includes a master device 51 having an operation unit 52 and a control unit 53, a repeater 54 connected to the master device 51 by wire, and wirelessly communicates with the repeater 54. And a portable slave unit 55. In addition, although the slave unit 55 is represented by one piece, it is usually constituted by a plurality of slave units 55.

[0005] The master device 51 has a microphone, a speaker and various function keys in the operation unit 52. For example, by operating a broadcast message key, a command can be transmitted from the microphone to a plurality of slave units 55 by voice.

[0006] The master device 51 transmits a voice from a microphone, receives a voice of the child device 55 from a speaker, and operates the arbitrary child device 55 by operating, for example, a call key and a number of the arbitrary child device 55. You can talk to one of them.

[0007] The repeater 54 includes a modem (modulator / demodulator), a transmission / reception unit and the like. After modulating the audio signal supplied from the master device 51, a transmission signal is transmitted from the transmission unit to the slave unit 55.

After the signal transmitted from the slave unit 55 is received by the receiving unit, the received signal is demodulated into an audio signal, and the audio signal is supplied to the master device 51. In addition,
The transmission / reception units of the repeater 54 and the slave unit 55 are configured by one channel.

The slave unit 55 includes a transmission / reception unit, a modem, a transmitter, and a receiver. The receiver 55 receives a transmission signal transmitted from the repeater 54, demodulates the transmission signal, converts the demodulated signal into an audio signal, and outputs the audio signal to the receiver ( (For example, earphones and headphones).

[0010] The slave unit 55 modulates an audio signal from a transmitter (for example, a microphone), and then transmits a transmission signal to the repeater 54 from a transmission unit.

As described above, the conventional wireless communication device 50 is
The repeater 54 and the slave unit 55 are provided with a one-channel wireless transmission / reception unit. The master device 51 sends a broadcast message to the slave unit 55, a simultaneous call between the master device 51 and the slave unit 55. A sound such as guidance from the slave unit 55 can be generated from a speaker installed in the venue.

[0012]

A conventional wireless communication device 5
0 indicates that the transmission / reception unit of the repeater 54 and the slave unit 55 is constituted by one channel,
When a simultaneous call is made to a user, a call cannot be made even if a call may be required between any of the slave units 55 and the master device 51. is there.

In addition, a call for communication between the plurality of slave units 55 and a call for communication between the master device 51 and the plurality of slave units 55 cannot be performed, and a wireless call used in an event hall or the like cannot be performed. There is a problem that the device lacks convenience.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a highly convenient wireless communication device which allows simultaneous communication between a master device and a plurality of child devices.

[0015]

According to the present invention, there is provided a radio communication apparatus according to the present invention, wherein a control unit includes a plurality of interface units corresponding to the number of repeaters, and audio signals from the plurality of interface units. And an audio signal mixing means for mixing an audio signal from a microphone of the master device.

[0016] In the wireless communication apparatus according to the present invention, the control unit includes a plurality of interface units corresponding to the number of repeaters;
Since the audio signal mixing means for mixing the audio signals from the plurality of interface units and the audio signal from the microphone of the master device is provided, simultaneous communication between a plurality of persons can be performed between the master device and the plurality of slave units. be able to.

Further, the radio communication apparatus according to the present invention can make a call from any handset and make a call with another handset via the master device.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, the present invention provides a highly convenient wireless communication device that allows simultaneous communication between multiple persons between a plurality of portable units carried by a clerk such as an event venue, a salesclerk or a security guard, and the master device. Is what you do.

FIG. 1 is an overall configuration diagram of a radio communication apparatus according to the present invention. In FIG. 1, a wireless communication device 1 includes a master device 2, a repeater 3, and a slave unit 4. The master device 2 and the repeater 3 are connected by a wired line, and the repeater 3 and the slave unit 4 are wireless. Communicate.

The master device 1 comprises an operation unit 5 and a control unit 6. The operation unit 5 includes a microphone, a speaker,
Equipped with various function keys, by operating various keys, simultaneous notification to a plurality of handset units 4, simultaneous call with any of a plurality of handset units 4, input sound from microphone, output sound from speaker It is configured to do.

The operation unit 5 includes various arithmetic means, processing means, storage means, a control circuit and the like based on a microprocessor. The input sound is subjected to sound-electric conversion by a microphone, and the sound signal is controlled by the control unit. 6 or an audio signal supplied from the control unit 6 is subjected to electro-acoustic conversion by a speaker,
Output as audio.

The control unit 6 mixes a plurality of audio signals with audio signal mixing means, and separates an audio signal (upstream audio signal) from the slave unit 4 and an audio signal (downstream audio signal) to the slave unit 4. And a plurality of interface units for supplying up-stream audio signals supplied from the plurality of slave units 4 via the repeater 3 to the speaker of the operation unit 5, and the up-stream audio signal and the sound from the microphone of the operation unit 5. The signals are mixed (mixed) and supplied to a plurality of slave units 4 via the repeater 3 as downlink audio signals.

The repeater 3 includes a plurality of repeaters T1 to TN having different channel frequencies. Repeater T1
The TN includes a microprocessor, a modem (modulator / demodulator), a transmission / reception circuit, etc., modulates a downlink audio signal supplied from the control unit 6 of the master device 2, and transmits the modulated signal from the transmission circuit to a plurality of wireless terminals. To the machine 4.

The repeaters T1 to TN include a plurality of slave units 4
And demodulates them to convert them into audio signals, which are supplied to the control unit 6 of the master device 1 as uplink audio signals.

The slave unit 4 includes a plurality of transceivers TR _{1 to} TR
R _N and sound units A, B, constructed in C, and in each transceiver TR ₁ to Tr _N configured to connect one of the sound units A through C. The sound units A to C
Is selected according to the use of the slave unit 4.

Each of the transceivers TR _{1 to} TR _N includes a microprocessor, a modem, a transmission / reception circuit, etc., modulates an audio signal corresponding to the audio input from the microphones of the audio units A to C, and converts the modulated audio signal. The signal is transmitted to the repeater 3 as a transmission signal of the designated channel.

After receiving the transmission signal transmitted from the repeater 3, the transceivers TR _{1 to} TR _N demodulate the signal into an audio signal, and output this audio signal as audio from earphones or headphones.

Each of the transceivers TR _{1 to} TR _N is configured to be able to access a plurality of channels, and is configured to automatically select an empty channel and communicate with any of the repeaters T 1 to TN.

FIG. 2 is a functional block diagram of a master device according to the present invention. In FIG. 2, the master device 2
Includes an operation unit 5 and a control unit 6.

The operation unit 5 includes a function key 10, a microprocessor 11, a display 12, a ROM 13, a RAM 14, a signal sound generator 15, a mixer 16, a control means 17, a microphone 18, and a speaker 19.

The function key 10 is provided with function keys for simultaneous notification, individual call, plural persons (for example, three-party call, group call) and the like, and supplies a key signal S _K corresponding to the operated function key to the microprocessor 11. I do.

The microprocessor 11 has various calculation functions and processing functions, and receives a key signal S _K from the function key 10.
The operation of the entire operation unit 5 is controlled based on

[0033] For example, and supplies a signal sound generation control signal S _A to the signal tone generator 15 when there is an incoming call from the handset 4, to the display unit 12 a display driving signal S _G. Also,
The microprocessor 11 has a ROM 13 and a RAM 1
The fourth memory or drives, controls the control signal S _C means 17
To supply.

The display device 12, LED, constituted by the display device such as LCD, call in response to the display drive signal S _G supplied from the microprocessor 11 state, the visual display, such as individual calling state.

The ROM 13 and the RAM 14
Software program and operation keys for controlling the operation of
The information from 0 is temporarily stored.

The signal sound generator 15 is constituted by an oscillator for generating an audio signal of an audible frequency.
A sound signal S _R for notifying an incoming call or abnormality occurs on the basis of the tone control signal S _A supplied from the mixer to the sound signal S _R 1
6

The mixer 16 is constituted by audio mixing circuit or the like, by mixing the mixed sound signal A _M supplied from the sound signal S _R and a control unit 6 which is supplied from the tone generator 15, the mixed audio signal driving the speaker 19 in S _M.

The control unit 17 is constituted by a control circuit for generating various control signals, the audio signal mixing means 20 the various control signals C _O based on the control signal S _C that is supplied from the microprocessor 11, PB signal generator 23, supply to the interface units 21 and 22.

The microphone 18 is operated from the operation unit 5 to the slave unit 4.
It is a transmitting means for broadcast notification to the user and communication with an arbitrary slave unit 4, and provides an audio signal _ST to the control unit 6.

As described above, the operation unit 5 performs simultaneous notification and communication to the slave unit 4 using the microphone 18 and the speaker 19, and operates the function key 10 to set the function of the wireless communication device 1.

The control unit 6 includes a sound signal mixing unit 20, interface units 21 and 22, a PB signal generator 23, an emergency signal generator 24, a signal delay unit 25, and a hall PC input unit 2.
6. It has output means 27. The control unit 6 is provided with two interface units 21 and 22 on the assumption that the number of the repeaters 3 shown in FIG. 1 is two (for example, T1 and T2),
When there are three or more repeaters 3, the number of interface units corresponding to the number of repeaters 3 is provided.

The audio signal mixing means 20 comprises a signal mixing circuit having a plurality of audio inputs.
Uplink speech signal A _U1 supplied from the 1, 22, A _U2, emergency audio signal is supplied from the emergency signal generator 24 S _I, delayed speech signal P Hall PC input signal P _C supplied from the signal delay unit 25 _D , a part or all of these audio signals are mixed, and a mixed audio signal A _M is outputted by output means 27.
And to the mixer 16 of the operation unit 5.

[0043] The audio signal mixing means 20, mixed audio signal (mixed sound signal A part or all of _M) downlink audio signal A _D1, A _D2 respectively interfaces as part 2
1 and 22.

FIG. 3 is a circuit diagram of one embodiment of the audio signal mixing means according to the present invention. 3, the audio signal mixing means 20 is driven by a single power supply of the power supply voltage V _D, V _D / 2
Is an operational amplifier OP1 having a virtual ground, and has a plurality of inputs.

The resistances R1, R2,...
The input resistance of P1 is formed, and the resistance RN is connected to the operational amplifier OP1.
To form a feedback resistor, the audio signal S _T supplied from the microphone 18 is amplified and output by the voltage gain which is determined by the ratio of the input resistor R1 and feedback resistor RN (= RN / R1).

[0046] Similarly, the uplink speech signal A _U1 is the voltage gain from the interface unit 21 (= RN / R2), an emergency speech signal S _I to be supplied from the emergency signal generator 24 voltage gain (= RN / RK) Each is amplified and output.
By setting the resistances R1 to RK to the same value (RE), the input signals S _T , A _U1 , and S _I are amplified with the same voltage gain (= RN / RE).

The output of the operational amplifier OP1 is a mixed audio signal A _M obtained by mixing audio signals obtained by amplifying the input signals S _T , A _U1 , and S _I , respectively.

The interface unit 21 and the interface unit 22 are provided with an audio signal separating unit and a switching unit, and are provided via the repeater 3 (for example, T1) based on the control signal _CO supplied from the control unit 17 of the operation unit 5. The upstream audio signal A _U1 (or the upstream audio signal A _U2, which is the audio signal from the slave unit 4 supplied via the repeater T2), and the audio signal mixing means. The downstream audio signal A _D1 (or the downstream audio signal A _D2 ), which is the mixed audio signal A _M supplied from 20, is separated and switched.

[0049] The interface unit 21 and the interface unit 22 includes the uplink speech signal PB (DTMF) signal S _PB supplied from PB signal generator 23 A _U1 (or uplink speech signal A _U2) outputs a.

The emergency signal generator 24 is composed of a voice reproducing device for recording an emergency report, an emergency signal sound generating device, and the like.
Emergency (e.g., fire or earthquake) for supplying emergency speech signal S _I of the evacuation to the audio signal mixing means 20 in.

The signal delay section 25 is constituted by an audio signal delay circuit or the like, and the hall P supplied from the hall PC input section 26 is provided.
C speech signal P _C (e.g., background music to flow into the hall, guidance and the like of the scheduled events) and a is delayed by a predetermined time and supplies the delayed audio signal P _D by delaying the audio signal mixing means 20. The reason for providing the signal delay unit 25 is to prevent the speech head cutting Hall PC audio signal P _C due to the switching of the various sound.

[0052] The output unit 27 includes an output amplifier, and outputs the sound from the installed speaker entertainments venue amplifies the mixed audio signal A _M supplied from the audio signal mixing means 20. Note that the mixed sound signal A _M output to the speaker is limited to a mixed sound signal required for a visitor.

As described above, the control section 6 includes the plurality of interface sections 21 and 22 and the audio signal mixing means 20,
Up audio signals from the handset 4 supplied from the interface section 21, 22 A _U1, A _U2 and mixed audio signal S _T from the operation unit 5 of the microphone 18, mixed mixed audio signal A _M a downlink voice signal Since A _D1 is returned to the slave unit 4 as the downstream audio signal A _D2 , a simultaneous call between a plurality of slave units (three in the configuration of FIG. 2) can be realized between the plurality of slave units 4 and the operation unit 5.

FIG. 4 is a functional block diagram of a main part of a repeater and a slave unit of the radio communication apparatus according to the present invention. 4, the repeater 3 includes a microprocessor 31, a modem (modulator / demodulator) 32, a receiver 33, a transmitter 34, and a repeater I.
D storage means 35 and a PB signal receiver 36 are provided. Although the number of the repeaters 3 is one, this corresponds to the repeater T1 shown in FIG.
TN have the same configuration except that the transmission frequency (for example, channel CH1) is different.

The microprocessor 31 has ROM, RA
M in the memory, various arithmetic functions, including a processing function, set the ID data I _AD of any handset 4 based on the PB signal S _PB supplied from PB signal receiver 36, the control signal C
_M , C _R , and C _T are supplied to the modem 32, the reception unit 33, and the transmission unit 34, respectively, to control the operation and control the ID data I _AD , transmission of the audio signal, and reception of the audio signal.

[0056] The microprocessor 31, PB signal audio mute data based on the S _PB data for the broadcast to multiple all child machine 4, to the child device 4 for each group,
Recognition and processing of call data to the designated slave, interrupt data from the designated slave, and the like are performed.

[0057] The modem 32, control signals C performs demodulation on the received signal _{A R} provided from the receiving section 33 on the basis of the _M, the uplink voice signal _{A U1} controller 6 (e.g., the interface unit 21 shown in FIG. 2) And modulates the downlink audio signal _AD1 supplied from the control unit 6 (for example, the interface unit 21 shown in FIG. 2), and supplies the transmission signal _AT to the transmission unit 34.

The receiving unit 33 receives a radio signal from the slave unit 4 based on the control signal C _R transmitted wirelessly by the antenna, detects the signal P _R1 received by an antenna, converted into a reception signal A _R And provides it to the modem 32.

The transmitting section 34 transmits the transmission signal P _T2 to the slave unit 4 with the transmission signal A _T supplied from the modem 32 on the carrier frequency (for example, channel CH1) based on the control signal C _T.

The repeater ID storage means 35 stores an identification ID for the repeater, and outputs it as self-ID data when transmitting. The ID data includes a manufacturer number, a repeater identification number, and the like.

In FIG. 4, the slave unit 4 includes a microprocessor 41, a modem 42, a transmission unit 43, a reception unit 44, a sound unit 45, a slave unit ID storage unit 46, and a setting switch 4.
7, a T switch 48, and an LED 49.

The microprocessor 41 has ROM, RA
M memory, various calculation functions and processing functions
Individual ID signal I _D of the slave unit 4 from the storage unit 46, transmitting switch signal T _S from transmitter switches (T switch) 48, on the basis of the set switch signal S _W from the setting switch 47 operation, performs processing , LED display signal (display device) 49 I _L, the modem 42, transmission section 43, the control signal C _M to each of the receiving portions 44, C _T, provides a C _R.

The microprocessor 41 mutes the designated handset 4 on the basis of the audio mute data supplied from the repeater 3, and sets so as not to receive the audio.

Modem 42, transmitting section 43 and receiving section 44
Has the same configuration and operation as the repeater 3, and thus the description is omitted.

The sound unit 45 includes a transmitter T and a receiver R
The transmitter T performs sound-to-electric conversion of the voice of the carrier and supplies a voice signal _AT to the modem. Receiver R is an audio signal A _R supplied from the modem 42 electrically - outputs sound by transducing. The acoustic unit 45 selects the acoustic unit A to the acoustic unit C shown in FIG.

The slave unit ID storage means 46 is composed of a memory such as a ROM, and stores an independent individual ID number for each of the slave units 4. Under the control of the processor 41, the transmitter T is set to the operating state, and a telephone conversation is performed with the operation unit 5.

The setting switch 47 is composed of, for example, a dip switch, and sets functions such as a group to which the slave unit 4 belongs and whether or not a call is possible.

The transmission (T) switch 48 is a call switch for calling, and a call can be made by operating this switch.

An LED (indicator) 49 visually displays the operating state of the slave unit 4 and, for example, changes the state of the general notification, individual calling, calling, or receiving mute to the carrier by changing the blinking of the display. Configure to inform.

[0070] In addition, providing a specifier machine TR _X is to the child device 4,
For example, a special ID number is set for the floor manager so that a call can be made prior to all the other slave units 4. Further, the specific slave unit TR _X does not belong to any slave unit group, and is configured not to be restricted by audio mute or the like.
Furthermore, in the case of a call from specifier unit TR _X allows listening all other handsets 4, the regulation of the call if necessary.

FIG. 5 is an explanatory view of a communication mode of the radio communication apparatus according to the present invention. In FIG. 5, two repeaters 3 are arranged on the same floor, and handset 4 is
And each group is composed of N units.

When the master device 2 broadcasts a message to all the slaves 4 at once, the broadcast message from the master device 2 is transmitted to the repeater T
1 (e.g., channel CH1) all handsets TR ₁₁ to Tr constituting the group K from group 1 handset 4 via the
Send to _KN .

In the case of simultaneous notification for each group, for example, only the slave units TR ₁₁ to TR _1N belonging to the group 1 can listen to the voice, and the slave units TR ₂₁ to the group K from the group 2 to the group K can be heard.
By muting all the voices (receive calls) to .about.TR _KN , it becomes possible to broadcast from master device 2 to group 1 only.

The specific child device TR carried by the floor manager
_X does not belong to any of the groups 1 to K, and the broadcast message from the master device 2 can be heard regardless of the group listening restriction.

Master device 2 to any child device TR of child device 4
_When calling _KK individually, repeater T1 (channel CH
The individual ID of the child device TR _KK is sent to the child device TR _KK via 1), and a communication path (transmission and reception) between the master device 2 and the child device TR _KK is formed, and simultaneous communication is performed.

[0076] In the case of simultaneous calls between the master device 2 and the slave unit TR _KK, also may be prohibited to enable the listening to other handset 4.

Next, during the simultaneous notification from the master device 2 to all the slave units 4 or the simultaneous notification to the slave units 4 in the designated group, the master unit 2
When a call is made, a signal for calling is transmitted via the repeater T2 (channel CH2), and the audio signal mixing means 20 of the master device 2 mixes the audio signal from the master device 2 with an arbitrary slave unit 4. Are mixed and sent to all the slaves 4 via the master device 2 and the repeaters T1 and T2, so that the master device 2 and any one of the slaves 4 (one unit) can communicate simultaneously. Is possible, and the contents of the simultaneous call can be heard by all the slaves 4.

Further, a call is made from another arbitrary handset 4 during simultaneous communication from any handset 4 via the repeater T1 (channel CH1), and the master device 2 is transmitted via the repeater T2 (channel CH2). The audio signals of the master device 2, an arbitrary slave unit 4 (one unit), and another arbitrary slave unit 4 (one unit) are mixed by the audio signal mixing means 20, so that simultaneous communication between three parties is possible.

Since the specific slave unit TR _X sets a special ID number and does not set the audio mute function of all the groups 1 to K, the master unit 2 has priority over all the other slave units TR _{11 to} TR _KN. , And the report from the master device 2 can be heard without being restricted.

FIG. 6 is an explanatory view of another communication mode of the radio communication apparatus according to the present invention. In FIG. 6, slave units TR _{11 to} T ₁₁
R _1N floor F1, handset TR ₂₁ to Tr _2N floor F2,
.., The slave units TR _{K1 to} TR _KN are arranged on the floor FK, and the repeater T1 (channel CH1) and the repeater T2 are arranged on the floor F1.
(Channel CH2), repeater T1 and repeater T3 (channel CH3) on floor F2, and repeater T1 and repeater TX (channel CHX) are installed on floor FK.

[0081] repeater T1 is placed in common on each floor f1 to fK, the broadcast from the master device 2 to all handsets TR ₁₁ to Tr _KN of all floors f1 to fK are performed through the repeater T1 .

[0082] In addition, a call from handset 4 in the broadcast from the master unit 2, the relay device T2 in the case of any arranged in the floor F1 1 single handset TR ₁₁ to Tr _1N, floor F
One handset of any arranged in 2 TR ₂₁ when the to Tr _2N repeaters T3, ..., any disposed in the floor FK 1
In the case of each of the slave units TR _{K1 to} TR _KN , the operation is performed via the repeater TX.

The transmission signals from a plurality of slaves 4 (one on each floor) originating from the repeaters T2 to TX are mixed by the audio signal mixing means 20 with the transmission signals from the master device 2. And the mixed audio signal is transmitted to each of the repeaters T2 to TX.
Is transmitted to any one of the sub-units 4 (one unit) that calls each floor F1 to floor FK via the network, so that simultaneous communication between a plurality of sub-units 4 and the master device 2 can be realized. Can be.

Note that the listening restriction of the broadcast message for each floor is the same as that described with reference to FIG. In addition, the specific slave unit TR _X
Is also the same as that described with reference to FIG.

FIG. 7 is a state transition diagram in the operation of simultaneous notification and calling of a slave unit according to the present invention.
Incidentally, the relay two T1 and T2, the slave unit in question will be described as two TR ₁₁ and TR _1N. In FIG. 7, the broadcast message from the master device is transmitted to the slave units TR ₁₁ and TR _1N via the repeater T1 (channel CH1) and is listened to.

[0086] In the state of the broadcast, the communication path is formed between the handset TR ₁₁ performs a call from the handset TR ₁₁ and the master device via the relay T2, the handset TR ₁₁ and the master device calls Transition to the state.

[0087] handset TR ₁₁ and communication contents of the master device, the slave unit TR _1N (or, all handsets TR ₁₂ except handset TR ₁₁
~ TR _1N ) may be listened to, or the audio may be muted to limit listening.

[0088] In the call state, sends a disconnection signal for call termination from the slave unit TR _11, sent to the master device via the relay T2, the call of the mobile device TR ₁₁ end call is established is cut after handset TR ₁₁ and the relay device T2 is shifting to the disconnected state,
Handset TR ₁₁ is again listening to the broadcast from the master device is switched to the repeater T1.

[0089] When the disconnection signal from the master device is transmitted, cut signal via the repeater T1 is transmitted to the child device TR ₁₁ and TR _1N, the broadcast is finished.

FIG. 8 is a state transition diagram in the operation of a three-party simultaneous call of the wireless communication device according to the present invention. Incidentally, the relay two T1 and T2, the slave unit in question will be described as two TR ₁₁ and TR _1N. 8, the individual calls a slave unit TR ₁₁ via the repeater T1 (channel CH1) from the master device, the master device and the slave unit TR ₁₁ becomes call state. Further, when a call from the handset TR _11, calling signal through the repeater T1 (channel CH1) is received in the master unit, the master unit and the slave unit TR ₁₁ is a call state.

[0091] call state of the master device and the slave unit TR ₁₁ can be listening at the slave unit TR _1N (or handset TR ₁₂ ~TR _1N-1).

When a call is made from slave unit TR _1N in a communication state between the master device and slave unit TR ₁₁ , repeater T 2 (channel C)
The calling signal is received by the master device via H2), and a communication path is formed between the master device and the child device TR _1N .

On the other hand, the audio signal mixing means 20 of the master device
The master device, the audio signal from the handset TR ₁₁ and handset TR _1N are mixed, mixed audio signal repeater T
1 (Cheneru CH1), repeaters T2 (channel T2) each handset TR ₁₁ via, sent to the slave unit TR _1N as received voice signal. The mixed audio signal is sent to the speaker of the master device via the mixer as a reception audio signal.

Thus, the master device and the slave unit TR ₁₁
In addition, it is possible to realize a three-party simultaneous call of the slave unit TR _1N .

The simultaneous three-party call is performed for all the remaining slave units TR _12.
~ TR _1N-1 to listen or limit listening. In addition, even in the listening restriction state of the three-party simultaneous call,
Specifier unit TR _X by operating the ship, it is possible to set the listening state or listening limit.

[0096] In three-way simultaneous communication state, sending a disconnect signal from the slave unit TR _1N to the master device via a repeater T2 (channel 2), the slave unit TR _1N to call termination state by cutting the channel CH2. (Two-party call state)

[0097] Feed in this state, a disconnect signal via the relay device T1 from the master device to the slave unit TR _11, channel C
Cutting the H1 to terminate the call of the master device and the slave unit TR _11.

In FIGS. 7 and 8, two repeaters are used.
Although the description has been given by taking two slave units as an example, there are three or more repeaters,
The same applies to the case of three or more slave units.

[0099]

As described above, in the radio communication apparatus according to the present invention, the control unit includes a plurality of interface units corresponding to the number of repeaters, and audio signals from these plurality of interface units and a master device. A voice signal mixing means for mixing the voice signal from the microphone is provided, and simultaneous communication between a plurality of parties can be performed between the master device and the plurality of slave units. Can be planned.

Therefore, it is possible to provide a highly convenient wireless communication device which has a simple configuration and allows simultaneous communication by a plurality of users.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a wireless communication device according to the present invention.

FIG. 2 is a functional block configuration diagram of a main part of a master device according to the present invention.

FIG. 3 is a circuit diagram of an embodiment of an audio signal mixing means according to the present invention;

FIG. 4 is a block diagram showing the functional parts of a repeater and a slave unit of the wireless communication device according to the present invention;

FIG. 5 is an explanatory view of a communication mode of the wireless communication apparatus according to the present invention.

FIG. 6 is an explanatory diagram of another communication mode of the wireless communication apparatus according to the present invention.

FIG. 7 is a state transition diagram in the operation of simultaneous notification and calling of a slave unit according to the present invention.

FIG. 8 is a state transition diagram in the operation of a three-party simultaneous call of the wireless communication device according to the present invention.

FIG. 9 is an overall configuration diagram of a conventional wireless communication device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wireless communication device, 2 ... Master device, 3 ... Repeater, 4 ...
Slave unit, 5 ... operation unit, 6 ... control unit, 10 ... function key, 1
1, 31, 41: microprocessor, 12: display,
13 ROM, 14 RAM, 15 signal tone generator, 1
6 mixer, 17 control means, 18 microphone, 1
9 speaker, 20 audio signal mixing means, 21, 22, ...
Interface section, 23 PB signal generator, 24 Emergency signal generator, 25 Signal delay section, 26 Hall PC input section, 27 Output means, 32, 42 Modem (modulator / demodulator), 33, 44 Reception Unit, 34, 43 ... transmitting unit, 35
... repeater ID storage means, 36 ... PB receiver, 45 ... sound unit, 46 ... slave unit ID storage means, 47 ... setting switch, 48 ... T switch, 49 ... LED, TR _X ... specific slave unit.

Claims (1)

[Claims] 1. A master device, at least two or more relay devices connected to the master device by wire and having different wireless channels, and a plurality of portable devices that communicate with the relay device wirelessly and are portable. And a wireless communication device that performs a call between the master device and the slave device via the relay device, wherein the master device has a control unit including a plurality of interfaces corresponding to the number of the repeaters. And a voice signal mixing means for mixing a voice signal from the plurality of interface units and a voice signal from a microphone of the master device.