JPH05316027A - Radio telephone system - Google Patents

Abstract

PURPOSE:To avoid trouble of redialing by the user of a radio telephone system slave set while taking a proper time into account when all public lines connected to the radio telephone system master set are busy. CONSTITUTION:In the radio telephone system comprising the radio telephone set master set 15 connecting to plural public lines and plural radio telephone system slave sets 11a-11c able to make radio communication with the radio telephone set master set 15, when other new slave set cannot make dialing because the public lines able to be connected to the radio telephone system master set 15 are all busy, the master set registers a recognition number of the slave set to a wait table 12. The occurrence of an idle line is informed to the user by sending a signal to the slave set of the recognition number to be registered as soon as the pubic line is idle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device, and more particularly to a cordless telephone device capable of wirelessly communicating with a plurality of cordless handsets.

[0002]

2. Description of the Related Art In recent years, a cordless telephone using radio has been used instead of a cord between a telephone body and a handset. A conventional cordless telephone device will be described below with reference to the drawings. FIG. 5 is a block diagram showing the configuration of a conventional cordless telephone device master unit, and FIG. 8 is a block diagram showing the configuration of a conventional cordless telephone device slave unit.

In FIG. 5, reference numeral 1 is a cordless telephone device master unit. In the base unit 1, 2a and 2b are line I / F units that are connected to analog public lines and close the lines, and 3 is a cordless telephone device, and control signals and voice signals are modulated to slave units 11a, 11b and 11c as high frequency signals. A transmitting unit 4 for transmitting, a receiving unit 4 for reproducing a control signal and a voice signal from a high frequency signal sent from the slaves 11a, 11b, 11c, and 5 a time division multiplex for digitizing signals of a plurality of lines into the same signal. And a multiplexer / demultiplexer 6 for demultiplexing the time-division-multiplexed signal into a plurality of individual signals.
The wireless controller 6 is managed by the wireless controller 7. Reference numeral 8 is a line switching unit for selecting one or two sets of the input of the demultiplexing unit 6 and the output of the multiplexing unit 5 and connecting to the line I / F units 2a and 2b, and 9 is a central control unit for controlling the entire apparatus, 10 is an antenna.

In FIG. 8, 20 is a speaker, 21 is a microphone, 22 is a key input unit (keypad), 23 is data from the key input unit 22 and data is sent from the main unit 10 in the cordless telephone device slave unit 11. The control unit 24, which receives the incoming control signal and controls each unit, 24 modulates the control signal and the audio signal sent from the control unit 23 to generate a high frequency signal,
In addition, the control signal from the high frequency signal sent from the base unit 1
A cordless transmitter / receiver that reproduces an audio signal, and 25 is an antenna.

The operation of the conventional cordless telephone device thus constructed will be described below with reference to the flowchart of FIG. When making a call using a conventional cordless telephone device, first, the power of the handset 11a is turned on and the call button is pressed (step A). Then, the control unit 23
Controls the cordless transmitter / receiver 24 to send a control signal to the master unit 1, and the master unit 1 receives this signal by the receiver 4 (step B), reproduces it, and sends it to the demultiplexer 6.
Next, when the wireless control unit 7 in the base unit 1 decodes this control signal and detects that there is a call request from the handset unit 11a (step C), it sends this detection signal to the central control unit 9 and at the same time transmits the detection signal. Confirmation (ACK) using the transmitter 3 via the downlink slot corresponding to the uplink time slot transmitted by the device 11a
The signal is transmitted to the child device 11a to connect the wireless link to the child device 11a.

If all the public lines to which the master unit can be connected are in use, the central control unit 9 has already controlled the line switching unit 8 so that the input of the demultiplexing unit 6 and the output of the multiplexing unit 5 are 2 A pair is selected and connected to the public line via the line I / F units 2a and 2b. Therefore, the central control unit 9 controls the wireless control unit 7 to send a signal (busy signal) indicating that all public lines are in use to the slave unit 11a via the transmission unit 3 to call the user. Notify that it is impossible (step X). The user then presses the end button to disconnect the wireless link (step Y). On the other hand, if there is at least one available public line to which the master unit can connect, the central control unit 9 that receives the detection signal controls the line switching unit 8 (step D), and the line selection unit 8 multiplexes. A slot corresponding to the time slot is selected from the plurality of lines from the separating unit 6 and is connected to the line I / F unit 2a or 2b corresponding to an empty public line.

After that, when a telephone number is input in the handset 11a using the key input unit 22 as in a normal wired telephone, the control unit 23 causes a multi-frequency signal (DTMF) corresponding to the input telephone number. To send. This signal is for handset 1
The signal is sent via the cordless transmitter / receiver 24 of 1a and the antenna 25. On the side of the base unit 1, this signal is received by the antenna 10 and the receiver 4 and sent to the public line via the line I / F unit 2a or 2b ( In step E), normal conversation becomes possible (step F). As a result, the cordless telephone device slave unit 11a makes a call.

Next, the case of receiving an incoming call will be described.
First, the central control unit 9 of the base unit 1 receives an incoming call from the public telephone line.
To detect. Then, the central control unit 9 controls the wireless control unit 7 to transmit a control signal via the transmission unit 3 to notify the slave unit 11a of an incoming call. In the child device 11 a, the control signal from the parent device 1 is received by the antenna 25 and the cordless transmission / reception unit 24 and input to the control unit 23. next,
The control unit 23 detects from the control signal that the base unit 1 has an incoming call and calls the handset 11a, and sounds a ringing tone of the handset 11a to notify the user that there is an incoming call. After that, when the user presses the call button in the cordless handset 11a, a confirmation (ACK) signal is sent from the cordless handset 1 using the cordless transceiver 24.
Send to. The base unit 1 receives the confirmation (ACK) signal at the reception unit 4, and when the wireless control unit 7 detects the confirmation signal, sends the confirmation signal to the central control unit 9. After that, the central control unit 9 controls the line switching unit 8 to select a slot from which a handset 11a is notified of an incoming call from a plurality of slots with the multiplexing unit 5, and the line corresponding to the incoming line is selected. At the same time as connecting to the I / F unit 2a or 2b, a wireless link to the base unit 1 and the handset unit 11a is connected to enter the call state.

Further, the above-described operation is performed by replacing the transmitting unit 3, the receiving unit 4, the multiplexing unit 5 and the demultiplexing unit 6 of the cordless telephone device master unit 1, as shown in FIG. It is also possible to replace with a plurality of transmitters of the machine 1, that is, a transmitter A3a, a transmitter B3b, a transmitter C3c and a plurality of receivers, that is, a receiver A4a, a receiver B4b, and a receiver C4c.

Therefore, when making a call in FIG. 7, first, the power of the handset 11a is turned on and the call button is pushed.
Then, the control unit 23 controls the cordless transmission / reception unit 24 to send a control signal to the master unit 1, and the master unit 1 receives and reproduces this signal by the receiving unit A4a. Next, when the wireless control unit 7 in the master unit 1 decodes this control signal and detects that there is a call request from the slave unit 11a, it sends this detection signal to the central control unit 9 and at the same time uses the transmission unit A3a. Confirm (AC
K) Send a signal to the handset 11a to connect a wireless link to the handset 11a. Here, if all public lines to which the parent device can be connected are in use, the central control unit 9 indicates to the wireless control unit 7 that all public lines are in use for the child device 11a via the transmission unit A3a. A signal (busy signal) is controlled to be sent, and the user is notified that the call cannot be made. This causes the user to press the end button to disconnect the wireless link. On the other hand, if there is at least one free public line to which the master unit can connect, the central control unit 9 receiving the detection signal controls the line selecting unit 8 so that the line selecting unit 8 selects an empty transmitting unit. Then, the line I / F unit 2a or 2b corresponding to the idle line is connected. After this, normal conversation is possible by the above procedure.

Next, the case of receiving an incoming call will be described.
First, the central control unit 9 of the base unit 1 receives an incoming call from the wired telephone line.
To detect. Then, the central control unit 9 controls the wireless control unit 7 to transmit a control signal via the idle transmitting unit, for example, 3a, to notify the slave unit 11a of an incoming call. In the child device 11 a, the control signal from the parent device 1 is received by the antenna 25 and the cordless transmitter / receiver 24 and input to the controller 23. Next, the control unit 23 controls the base unit 1 according to the control signal.
It is detected that there is an incoming call to the mobile device 11a, and a ringing tone of the mobile device 11a is sounded to notify the user that there is an incoming call. After that, when the user presses the call button in the cordless handset 11a, confirmation is performed using the cordless transceiver 24 (AC
K) Send a signal to base unit 1. Base unit 1 confirms (ACK)
Receiving unit A4 corresponding to the transmitting unit that transmitted the signal
When the wireless control unit 7 receives the confirmation signal at step a, the wireless control unit 7 sends the confirmation signal to the central control unit 9. After that, the central control unit 9 controls the line switching unit 8 to select the receiving unit A4a and connect to the line I / F unit 2a or 2b corresponding to the idle line, and at the same time connect the wireless link to the master unit 1 and the slave unit 11a. Then enter the call state.

[0012]

However, the above-mentioned conventional cordless telephone device has the following problems. In response to a call from the cordless telephone device slave unit 11c, the public line to which the master unit can connect is the slave unit 11
When being used by a and 11b, the central control unit controls the line switching unit and does not close the line with the line I / F unit, indicating that the public line is being used for the handset 11c. A signal (busy signal) is sent to notify the user. Therefore, it is not possible to make a call from the child device 11c.
After that, the user had to make a call again at a certain time, and the procedure was very troublesome.

The present invention solves the above problem, and even when all public lines connectable to the master unit are in use and a call cannot be newly made from another slave unit, the public line will be available to the user as soon as the public line becomes available. It is an object of the present invention to provide a cordless telephone device that can notify the fact.

[0014]

In order to achieve the above object, the wireless telephone apparatus of the present invention stores the identification number of the slave unit which has made a call request when the master unit is in use of all public lines. It has a standby table.

[0015]

According to the present invention, with the above configuration, when all the public lines to which the master unit can be connected are in use and a new call request is made to the master device from another slave device, the master device makes a call. The identification number of the requested slave unit is registered in the standby table, and then a signal indicating this is sent to the registered slave unit as soon as the public line becomes available. As a result, it is possible to eliminate the annoyance of the user for making a call again after checking the time.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram showing a configuration of a cordless telephone device master unit according to an embodiment of the present invention, FIG. 2 is a flowchart showing a calling process of the cordless telephone device master unit, and FIG. 3 is a flowchart of the cordless telephone device master unit. It is a flowchart showing a line availability notification process.

In FIG. 1, reference numeral 15 is a cordless telephone base unit in this embodiment. 2a and 2b are line I / F parts,
3 is a transmitting unit, 4 is a receiving unit, 5 is a multiplexing unit, 6 is a demultiplexing unit, 8 is a line switching unit, 10 is an antenna, and 11a and 11a.
Reference numerals b and 11c are slaves, respectively, which are the same as in the conventional example. Reference numeral 12 is a standby table for storing the identification number of the slave unit when the master unit 15 receives a call request from another slave unit while all public lines are in use, and 13 is a central control for controlling the entire system. Reference numeral 14 denotes a radio controller for managing the transmitter 3 and the multiplexer 5, the receiver 4 and the demultiplexer 6. On the other hand, as in FIG. 8, 20 in the cordless telephone device slave unit 11 is a speaker, 21 is a microphone, and 22.
Is a key input unit (keypad), 24 is a cordless transmission / reception unit, and 25 is an antenna. These are the same as in the conventional example. Reference numeral 23 is a control unit that receives data from the key input unit 22 and a control signal sent from the cordless telephone device master unit 15 and controls each unit.

The operation of the cordless telephone device thus constructed will be described below. The case of receiving an incoming call using the cordless telephone device of this embodiment is exactly the same as the conventional example. A case of making a call using the cordless telephone system of this embodiment will be described with reference to FIG. First, the power of the handset 11c is turned on and the call button is pressed (step A). Then, the control unit 23 controls the cordless transmission / reception unit 24 to send a control signal to the parent device 15, and the parent device 15 receives this signal by the receiving unit 4 (step B), reproduces it, and then sends it to the demultiplexing unit 6. Send out. The wireless controller 14 in the base unit 15 decodes this control signal and detects that there is a call request from the handset 11c (step C). At this time, if there is at least one free public line, it becomes possible to talk as in the conventional example (step D, step E, step F).

On the other hand, if all public lines to which the master unit can be connected are in use, the public line is in use using the transmitting unit 3 via the downlink slot corresponding to the uplink time slot transmitted by the slave unit 11c. A handset 11 that informs that the busy signal
It is sent to c and notified to the user (step G). After that, the user selects whether or not to wait for a free line (step H), and operates the operation button on the operation unit in the child device. In the above selection, if it is decided not to wait for a free line, the wireless link between the master unit 15 and the slave unit 11c is disconnected (step I). When it is decided to wait for the line to be idle by the above selection, the control unit 23 controls the cordless transmission / reception unit 24 to send a control signal to the master unit 15, and the master unit 15 receives this signal by the reception unit 4 and the wireless communication is performed. It is decrypted by the control unit 14 and sent to the central control unit 13. The central controller 13 receives this signal and receives the slave unit 1
The identification number of 1c is registered in the standby table 12 (step J). Then, the user presses the end button to disconnect the wireless link (step K).

A case where the public line is vacant in this state will be described with reference to FIG. When the central control unit 13 detects that the user who has been using the public line has ended the call (step L), the line I / F corresponding to the vacant line
The part 2a or 2b is controlled to be in an off-hook state (step M). At this time, if there is an incoming call from the public line, the call can be made by the same processing as the conventional example. (Step N). Next, if there is no incoming call from the public line, the central control unit 13 controls the line switching unit 8 to select one slot from a plurality of slots with the multiplexing unit 5 (step O),
Further, the child device 11c registered in the standby table 12
The identification number of is read (step P). After that, the central control unit 13 controls the wireless control unit 14 so as to transmit the control signal to the child device 11c via the transmission unit 3 (step Q).
In the child device 11c, the control signal from the parent device 15 is transmitted to the antenna 2
5, received by the cordless transceiver 24, the controller 23
Is input to. Next, the control unit 23 detects from the control signal that the parent device 15 is calling the child device 11c,
The user is notified by sounding the ringing tone of the handset 11c (step R). If the handset 11c does not respond in this state, the wireless link and the public line are disconnected as they are.

On the other hand, the user inputs the key input section 2 of the child device 11c.
When the handset 11c responds by pressing the call button in 2, confirmation is made using the cordless transceiver 24 (ACK).
The signal is transmitted to the base unit 15. Master device 15 confirms (ACK)
When the signal is received by the receiver 4 and the confirmation signal is detected by the wireless controller 14, the confirmation signal is sent to the central controller 13. After that, the central control unit 13 connects the wireless link with the slave unit 11c, and controls the wireless control unit 14 to transmit a control signal indicating that the line is vacant via the transmission unit 3 (step T). In the child device 11c, the control signal from the parent device 15 is received by the antenna 25 and the cordless transmission / reception unit 24 and input to the control unit 23, and recognizes that the public line has an empty space. After this, just like a normal wired phone,
When the telephone number is input in the handset 11c using the key input unit 22 (step U), the control unit 23 transmits a multi-frequency signal (DTMF) corresponding to the input telephone number.
This signal is sent via the cordless transmission / reception unit 24 and the antenna 25 of the child device 11c, and on the parent device 15 side, this signal is received by the antenna 10 and the receiving unit 4, and the line I / F unit 2a is received.
Or, it is sent to the public line via 2b (step V), and normal conversation becomes possible (step W).

Further, the above-described operation is performed by replacing the transmitting unit 3, the receiving unit 4, the multiplexing unit 5 and the demultiplexing unit 6 of the cordless telephone device master unit 15 with each other as shown in FIG. A plurality of transmitters of the machine 15 ', that is, a transmitter A3
It is also possible to replace a, the transmitting unit B3b, the transmitting unit C3c, and a plurality of receiving units, that is, the receiving unit A4a, the receiving unit B4b, and the receiving unit C4c.

[0023]

As described above, according to the present invention, when all public lines connectable to the base unit of the wireless telephone device are in use,
Even when there is a call request to the base unit from another handset, the identification number of the handset is registered in the standby table. Therefore, as soon as the public line becomes available, the base unit with the identification number registered in the standby table That is, the user of the cordless handset does not need to perform the troublesome work of redialing and checking the availability of the public line, which greatly improves usability.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a cordless telephone device master unit in one embodiment of the present invention.

FIG. 2 is a flowchart showing a calling process of a master unit of a cordless telephone device according to an embodiment of the present invention.

FIG. 3 is a flowchart showing a line availability notification process of the cordless telephone device master unit in one embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a base unit of a cordless telephone device according to another embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a cordless telephone device master unit in a conventional example.

FIG. 6 is a flowchart showing a calling process of a cordless telephone device master unit in a conventional example.

FIG. 7 is a block diagram showing a configuration of a cordless telephone device master unit in another conventional example.

FIG. 8 is a block diagram showing a configuration of a cordless telephone device slave unit in another conventional example.

[Explanation of symbols]

 2a, 2b Line I / F unit 3 Transmitter unit 3a to 3c Transmitter unit A to C 4 Receiver unit 4a to 4c Receiver unit A to C 5 Multiplexer unit 6 Demultiplexer unit 8 Line switching unit 10, 10a to 10c Antenna 11, 11a to 11c Cordless telephone device Slave unit 12 Standby table 13 Central control unit 14 Wireless control unit 15, 15 'Cordless telephone device master unit 20 Speaker 21 Microphone 22 Key input unit 23 Control unit 24 Cordless transmitter / receiver unit 25 Antenna

Claims (2)

[Claims] 1. A microphone, a speaker, a key input unit,
High-frequency signals from the base unit of the wireless telephone device are received and control signals are received.
A transmission / reception unit that reproduces a voice signal, modulates a control signal / voice signal, and transmits it as a high-frequency signal to the base unit of the wireless telephone device, and a control that manages key data from the key input unit and controls the transmission / reception unit A plurality of wireless telephone device slave units, a receiving unit that receives a high-frequency signal from the wireless telephone device slave unit and reproduces a control signal / voice signal, and modulates the control signal / voice signal as a high-frequency signal. A transmitter for transmitting to the slave unit of the wireless telephone device, a multiplexer for digitizing signals of a plurality of lines and time-division multiplexing them into the same signal, and separating the time-division multiplexed signal into a plurality of individual signals. Demultiplexing unit, a plurality of line interface units connected to an analog or digital line to close the line, and a plurality of sets of inputs of the demultiplexing unit and outputs of the multiplexing unit are selected to select the line interface. A line switching unit for connecting the face portion, a radio telephone device composed of a central control unit for controlling the entire apparatus, a wireless telephone system base unit that includes a waiting table registering the handset identification number. 2. A microphone, a speaker, a key input section,
High-frequency signals from the base unit of the wireless telephone device are received and control signals are received.
A transmission / reception unit that reproduces a voice signal, modulates a control signal / voice signal, and transmits it as a high-frequency signal to the base unit of the wireless telephone device, and a control that manages key data from the key input unit and controls the transmission / reception unit A plurality of wireless telephone device slave units, a plurality of receiving units that receive high-frequency signals from the plurality of wireless telephone device slave units and reproduce control signals / voice signals, and modulate the control signals / voice signals. A plurality of transmitters for transmitting high-frequency signals to the plurality of wireless telephone device slave units, a plurality of line interface units connected to an analog or digital line for closing the line, and a plurality of sets of the transmitters and receivers. A line switching unit for selecting an arbitrary set of the units and connecting to the line interface unit, a central control unit for controlling the entire device, and a standby cable for registering a slave unit identification number. Wireless telephone device that is composed of a wireless telephone device the master unit.