JPH04367129A - Radio telephone set - Google Patents

Abstract

PURPOSE:To inform an operator of the subscriber telephone set of communicable time when a speech with the subscriber telephone set is performed through a central station. CONSTITUTION:A control part 11 indicates the generation of an alarm sound against an alarm sound generation part 14 before the elapsed time from the start of the speech exceeds the communicable time. The connection destination on the transmission part 3 in a transmitting signal changeover switch 13 shall be the alarm sound generation part 14, and the alarm sound is transmitted to the subscriber telephone set through the transmission part 3 and the central station.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone device which is a terminal device in a radio communication system such as an MCA system.

0002

2. Description of the Related Art FIG. 11 is a system configuration diagram showing an example of an MCA system. In the figure, 31A and 31B are mobile stations given the same user code, and 32 is a communication center (command station) given the same user code as the mobile stations 31A and 31B, both of which are terminal stations. It is. Therefore, these will be collectively referred to as the terminal station 30. Further, 40 is a central station that controls and relays communications of the terminal station 30, and 50 is a subscriber telephone set accommodated in this central station 40 via a general subscriber telephone network (hereinafter referred to as PSTN).

FIG. 12 is a block diagram showing the configuration of the terminal station 30. In the figure, 1 is an operation section for performing operations such as requesting a call, 2 is a control section for controlling the entire device, and 3 is a carrier wave. 4 is a receiving section that demodulates the received radio waves; 5 is an interface circuit for connecting the display section 6 to the control section 2; 6 is an interface circuit for connecting the display section 6 to the control section 2; a display section for displaying; 7 a demodulation control section for converting the received signal demodulated by the receiving section 5 into an audio signal;
8 is a speaker for audio outputting the output signal of the demodulation control unit 7;
9 is a microphone into which the audio signal to be transmitted is input;
10 is a modulation control unit that converts the audio signal into a transmission signal; 13
is a transmission signal changeover switch.

Next, the operation will be explained. Here, the operation when the terminal station 30 communicates with the subscriber telephone set 50 will be explained. First, the operator of the terminal station 30 which is not in communication uses the operation unit 1 to input a telephone number. The control section 2 sends the input telephone number to the modulation control section 10 via the transmission signal changeover switch 13. Then, the transmitter 3 is caused to transmit a PSTN connection request control signal.

[0005] When the central office 40 receives the signal, it performs a PSTN call origination processing operation using an attached PSTN connection add-on device. That is, the PS corresponding to the terminal station 30
Select a TN line, send an off-hook signal and dial number to that line, and wait for a response from the PSTN line.

[0006] After that, when receiving an off-hook signal from the PSTN line side within a certain period of time, the central office 40 performs a channel designation operation. That is, it sends to the terminal station 30 a call time T1 meaning the maximum time during which a call can be made and a channel designation for designating a call channel (in this case, by a PSTN individual designation signal).

[0007] In the terminal station 30, the radio waves received from the central station 40 are demodulated by the receiving section 4. The received signal after demodulation is then sent to the control section 2. The control unit 2 decodes and decodes the received signal, and checks whether a channel designation signal matching the user code and frequency of the communication channel set in the control unit 2 has arrived.

[0008] When the corresponding channel designation signal is received while waiting for the corresponding channel designation signal, the control unit 2 controls the call time T included in the channel designation signal.
Determine 1. Further, the transmitting section 3 and the receiving section 4 are set to match the designated communication channel. Note that the call time T1 is 1 minute, 2 minutes, or 3 minutes depending on the central office 40. Hereinafter, it is assumed that the call time T1 is 3 minutes.

[0009] Thereafter, the terminal station 30 starts a call with the subscriber telephone set 50, and the central office 40 relays the communication between the terminal station 30 and the subscriber telephone set 50. The control unit 2 displays a display as shown in FIG. 13 on the display unit 6 via the interface circuit 5 as initial processing of the call operation. In the example shown in FIG. 13, the characters "FFF" indicate that communication is in progress with subscriber telephone 50, and the characters "FFF" indicate that communication is in progress with subscriber telephone 50.
``Individual'' characters, ``Area'' characters indicating that the communication area is within the communication range of the central station 30, ``Occupied'' characters indicating that the call channel is occupied, and the call time T1 in this case.
“3 minutes” is displayed. Furthermore, the control unit 2 starts measuring the actual call time.

During a call, the control section 2 instructs the reception section 4 to send the received signal from the reception section 4 to the demodulation control section 7 . The demodulation control section 7 converts the received signal into an audio signal. The speaker 5 then outputs audio based on the audio signal. On the other hand, the audio signal output from the microphone 9 is sent to the modulation control section 10 via the transmission signal changeover switch 13, and is converted into a transmission signal by the modulation control section 10. Then, the transmitter 3 puts the transmission signal on a carrier wave, and then transmits it as a radio wave.

[0011] Furthermore, when one of the call termination conditions at the terminal station 30 is satisfied, the control section 2 controls the transmission section 3 and the reception section 4.
is set to match the control channel, and a control channel capture operation is performed.

The call termination conditions at the terminal station 30 are as follows:
It is one. (1) When a call end signal is received. (2) When the radio waves of the communication channel are not received for a certain period of time (reception is interrupted). (3) When the designated call time T1 has elapsed.

[0013] The central office 40 determines that the communication has ended when the call time T1 has elapsed during the communication or when on-hook of the subscriber telephone 50 is detected. and,
A call termination signal is sent to the terminal station 30, and the subscriber telephone 50 is placed on hook.

Note that the subscriber telephone 50 becomes capable of communication after sending an off-hook signal, and sends an on-hook signal when it wants to end communication. In addition, the call time T1
When this period has elapsed, an on-hook signal is received from the central station 40, and the process is forcibly terminated.

[0015]

[Problems to be Solved by the Invention] Since the conventional wireless telephone device is configured as described above, when the subscriber telephone 50 is called from the wireless telephone device side, the subscriber telephone 50
There was a problem in that the operator on the other side was not aware of the progress of the call time T1, and the call was suddenly forcibly terminated.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a wireless telephone device that allows an operator of a subscriber telephone to recognize the point of forced termination.

[0017]

[Means for Solving the Problems] The wireless telephone device according to the invention as set forth in claim 1 includes a control section that outputs an audible sound output instruction when the actual call time exceeds a predetermined time within the call time T1, and the control section that outputs an audible sound output instruction. The apparatus includes an audible sound generating section that generates an audible sound in response to the signal and outputs the audible sound to a transmitting section.

[0018] Furthermore, the wireless telephone device according to the invention according to claim 2 includes a control section that outputs information indicating the call time T1, and an audible sound indicating the call time T1 according to the information to the transmitter. and an audible sound generator.

[0019]

[Operation] When the actual call time exceeds a predetermined time, the control section causes the audible sound generating section to generate a predetermined audible sound, and automatically sends a predetermined audible sound to the terminal of the other party. Send audio.

[0020] Furthermore, the control unit in the invention according to claim 2 causes the audible sound generation unit to generate an audible sound corresponding to the call time T1, and automatically informs the terminal of the other party of the call of the call time T1.
1 will be notified.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a wireless telephone device according to a first embodiment of the present invention, and in the figure, 11 is a control unit that can output information indicating that the elapse of a predetermined time has passed after the start of a call; 12 is a reception signal selection switch, 14
is an alarm sound generation section (audible sound generation section) that generates an alarm sound. The other parts have the same reference numerals and correspond to those shown in FIG. 12.

Next, the operation will be explained with reference to the flowchart shown in FIG. Before starting communication, the operator of the terminal station 30 sets a set time T3 for generating an alarm sound from the operation unit 1.
Enter. When the time specified by the central station 40 (call time T1 - set time T3) has elapsed, the control section 11 outputs a notification to that effect to the alarm sound generating section 14. Therefore, for example, if the setting time T3 is 10 seconds and the call time T1 is 3 seconds,
minute, the alarm start time T2 is 2 minutes and 50 seconds. Further, the alarm sound duration time T4 is similarly input from the operation unit 1.

[0023] When communication starts, the control section 11 performs initial settings (step ST1). That is, the alarm start time T2 is calculated from the call time T1 instructed by the central station 40 and the set time T3. Then, measurement of the actual call time is started.

[0024] During communication, the received signal changeover switch 1
2 is set to connect the demodulation control section 7 and the speaker 8 according to instructions from the control section 11. Therefore, the audio signal received from subscriber telephone 50 is given to the speaker. Further, the audio signal output from the microphone 9 is given to the modulation control section 10 via the transmission signal changeover switch 13.

In this state, the control section 11 determines whether or not the call termination condition is satisfied (step ST2). If so, the same communication termination process as in the conventional case is performed (step ST7). If the call termination condition is not satisfied, it is determined whether the actual call time has passed the alarm start time T2 (step ST3).

If the alarm start time T2 has passed, the alarm sound generator 14 generates an alarm sound, and time measurement is started in order to know the progress of the alarm continuation time T4. Further, the transmission signal changeover switch 13 is instructed to connect the alarm sound generation section 14 and the modulation control section 10, and the reception signal changeover switch 12 is instructed to connect the alarm sound generation section 14 and the speaker 8. An instruction is given to connect (step ST4).

[0027] In this way, the telephone subscriber 50 who is the other party
An alarm sound is transmitted to the user, and an alarm sound is also emitted from the speaker 8. Here, as shown in FIG. 3, on the display screen displayed on the display unit 6, the display portion indicating the call time T1 may be erased to inform the operator that the microphone 9 cannot be used for a call.

The control section 11 determines whether or not the alarm duration time T4 has elapsed (step ST5), and if it has elapsed, resets the device to the talking state (step ST6). That is, the alarm sound generation unit 14 is instructed to stop the alarm sound, the transmission signal changeover switch 13 is set to connect the microphone 9 and the modulation control unit 10, and the reception signal changeover switch 12 is set to connect the demodulation control unit 7 and the speaker. 8. As a result of the above processing, an alarm sound is emitted from the handset of the subscriber's telephone 50 after the start of the call and before the call time T1 has elapsed.

Note that in the above embodiment, the alarm sound generating section 14
We explained the case where an alarm sound is generated by
As shown in FIG. 4, an alarm sound generating section 1 is used as an audible sound generating section.
4 may be replaced with a voice synthesis section 15 for transmitting voice. In this case, step ST in FIG.
In step 4, the control section 11 instructs the speech synthesis section 15 to output speech. Then, the speech synthesis section 15
For example, a voice saying "10 seconds left" is output. Therefore, a voice saying "10 seconds left" is emitted from the handset of subscriber telephone set 50.

Furthermore, in the above embodiment, the alarm sound is emitted when the remaining call time is short, but the alarm sound may be emitted at fixed time intervals. In that case, as shown in the flowchart of FIG.
1 sets the alarm interval time T5 when starting communication or resetting the communication state (steps ST8 and ST9).
Control is performed to send out an alarm sound at each point in time when the actual call time becomes a multiple of the alarm interval time T5.

FIG. 6 is a block diagram showing a wireless telephone device according to another embodiment of the present invention. In the figure, 21 is a control unit that gives switching instructions to the transmission signal changeover switch 13 and reception signal changeover switch 12 at the start of a call, and activates the voice synthesis unit 24, and 24 is a voice synthesis unit that outputs a voice indicating the call time T1. (audible sound generator). Other parts are the same as those shown in FIG. 1 with the same reference numerals.

Next, the operation will be explained with reference to the flowchart shown in FIG. In this case, upon receiving the channel designation signal from the central station 40, in addition to initializing the transmitter 3, the receiver 4, etc., the voice synthesizer 24 is provided with the setting information of the transmission signal, that is, the call time T1. The information indicating this is given and activated (step ST11). If the specified call time T1 is 3 minutes, the setting information for the sending signal is as follows.
This is information indicating that it is 3 minutes.

At the same time, the transmission signal changeover switch 13 is set to connect the voice synthesis section 24 and the modulation control section 10, and the reception signal changeover switch 12 is set to connect the voice synthesis section 24 and the speaker 8. Set (step ST1
2). As a result, the voice synthesizer 24 generates a voice saying, for example, "It's been 3 minutes", and the voice is given to the telephone subscriber 50, which is the other party of the conversation, via the transmitter 3 and the central office 40, 8 is also given.

At this time, as shown in FIG. 8, the words "Send" are displayed on the display screen displayed on the display unit 6 to indicate that the voice indicating the communication time T1 is being output. The operator may be notified.

When the voice synthesis section 24 completes the voice output (
In step ST13), the control unit 21 performs settings for the operator to make a call. That is, the transmission signal changeover switch 13
is set so that the microphone 9 and the modulation control section 10 are connected, and the received signal changeover switch 12 is set so that the demodulation control section 7 and the speaker 8 are connected. after that,
Call processing is performed as in the conventional case.

In the above embodiment, the case where the voice outputted by the voice synthesizer 24 is transmitted to the subscriber telephone set has been explained, but as shown in FIG. A generating section 25 may be provided and the tone generated by the tone generating section 25 may be transmitted. Tone generator 2
5 sends out a frequency signal in the audible band according to instructions from the control unit 21.

In this case, the control section 21 issues an instruction to transmit a tone of a predetermined format in the process of step ST12 in FIG. For example, as shown in FIG. 10, when the instructed call time T1 is one minute, the tone generator 25 is caused to output one continuous tone (see FIG. 10(A)). Also, the call time T1 is 2
If it is the minute, the tone generator 25 outputs two consecutive tones (see FIG. 10(B)). When the call time T1 is 3 minutes, the tone generator 25 outputs three consecutive tones (see FIG. 10(C)).

Since the generated tone is output from the handset of the subscriber telephone 50, the operator of the subscriber telephone 50 can listen to the output tone and recognize the call time T1 from the number of times the tone is heard.

[0039]

As described above, according to the invention as set forth in claim 1, the wireless telephone device is configured to automatically transmit an audible sound after a predetermined period of time has passed from the start of a call. This has the advantage of being able to notify the operator of the subscriber telephone of the remaining talkable time.

Further, according to the invention as claimed in claim 2, since the wireless telephone device is configured to automatically transmit an audible sound indicating the available talk time at the start of a call, the operation of the subscriber telephone set to be the other party is not necessary. This has the effect of informing the person in advance of the available call time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a wireless telephone device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of what is shown in FIG. 1;

FIG. 3 is an explanatory diagram showing an example of a display screen during audible sound transmission.

FIG. 4 is a block diagram showing a wireless telephone device according to another embodiment of the invention.

FIG. 5 is a flowchart showing the operation of the one shown in FIG. 4;

FIG. 6 is a block diagram showing a wireless telephone device according to yet another embodiment of the present invention.

FIG. 7 is a flowchart showing the process shown in FIG. 6 at the time of starting a call.

FIG. 8 is an explanatory diagram showing an example of a display screen during audible sound transmission.

FIG. 9 is a block diagram showing a wireless telephone device according to still another embodiment of the present invention.

FIG. 10 is a timing diagram showing tone generation timing.

FIG. 11 is a system configuration diagram showing an example of an MCA system.

FIG. 12 is a block diagram showing a conventional wireless telephone device.

FIG. 13 is an explanatory diagram showing an example of a display screen during a call.

[Explanation of symbols]

3 Transmission section 4 Receiving section 11 Control section 14 Alarm sound generation unit (audible sound generation unit) 21 Control unit 24 Speech synthesis section (audible sound generation section)

Claims (2)

[Claims] 1. A transmitting section that transmits a transmission signal to a central station via a wireless line, and a receiving section that receives a received signal from the central station via the wireless line. a control unit that controls the transmitting unit and the receiving unit, and outputs an audible sound output instruction when it is detected that the call time from the start of the call exceeds a predetermined time; A radio telephone device comprising: an audible sound generating section that provides an audible sound to the transmitting section in response to the audible sound output instruction. 2. A transmitting unit that transmits a transmission signal to a central station via a wireless line, and a receiving unit that receives a received signal from the central station via the wireless line. In a wireless telephone device that makes a call with a terminal, a control unit that controls the transmitting unit and the receiving unit and outputs information indicating available talk time, and receiving the information,
1. A radiotelephone device comprising: an audible sound generating section that outputs an audible sound corresponding to a call available time to the transmitting section.