JPH0720282B2 - Wireless telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a wireless telephone device including one master unit and a plurality of slave units.

(B) Conventional technology In recent wireless telephone devices, a multi-channel system having one control channel and a plurality of communication channels is adopted, and a master unit connected to a telephone line and a master unit and a radio unit are connected to each other. Between the connected slave units, the control channel sends and receives connection control signals between the master unit and slave units, selects the call channel to talk on, and sets the same call channel for both the master unit and slave units. However, the call is made on the call channel.

Further, recently, as shown in FIG. 12, there has been proposed a configuration in which a plurality of slave units are provided for one master unit so that incoming and outgoing calls can be made from any of the slave units (for example, Japanese Patent Publication No. 62-62). -55333 publication).

(C) Problem to be Solved by the Invention In the above-described multi-channel system, the master unit that detects an incoming call sends the call channel information selected to the slave unit via the control channel as shown in FIG. A call signal including the incoming call is transmitted, and when the handset responds to the call signal, the handset shifts to the selected communication channel, and this time, a transmission permission signal is transmitted to the handset through the call channel. Then, when the slave unit emits a ringing tone and the slave unit who notices the call performs an off-hook operation, the slave unit sends an off-hook signal to the master unit through the call channel.
When the base unit detects this, the line is connected and the handset can talk.

At this time, if there are multiple slave units, the master unit sends a call signal to all the slave units, and controls so that only the slave unit that first performs the call operation is connected to the line. A child machine whose power is turned off inside the machine cannot respond to the ringing signal from the parent machine, so a person who knows that there is an incoming call in some way is near the child machine whose power was turned off. There was a problem that I could not make a call even if I tried to call it because it was correct. That is, when the master unit that has transmitted the call signal responds to the slave unit whose power is turned on, it shifts to the call channel as described above, so the slave unit that was powered off at that time This is because even if the power is turned on and the response is made, the child device is set to the control channel and makes an outgoing call response, and it is not possible to transfer to the same call channel as the parent device.

(D) Means for Solving the Problems The present invention provides a means for detecting the presence or absence of a slave unit that did not respond to a call signal in the master unit, and a call channel and a control channel when it is detected that there is a slave unit that does not respond. Is composed of a control means for alternately searching for a predetermined time interval.

(E) Operation The present invention is configured as described above, and since the control means of the master unit alternately searches the call channel and the control channel, it is possible to answer the incoming call even from the slave unit whose power is off.

(F) Embodiments Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration of the master unit (1), and (2) is a control circuit configured by a microcomputer, which controls the entire control according to a control program in a built-in program memory.
(3) is a receiver that receives a signal from the slave unit, and the received call signal is a telephone line (L) through the line connection circuit (4).
The control signal supplied to the modem circuit while being received is to the modem circuit (5).
The signal is demodulated into a digital signal and supplied to the control circuit (2). (6) is a PLL synthesizer circuit for setting the local oscillation frequency of the receiving section (3), and generates a predetermined frequency based on the channel data from the control circuit (2).
(7) is a transmission unit that transmits to the child device, and is a line connection circuit (4)
Call signal and the control signal output from the control circuit (2) are modulated by the modem circuit (5) are input,
Send to the handset. The receiving section (3) is always set to the operating state, but the transmitting section (7) is controlled by the control circuit (2) so that it is set to the operating state only when the transmitting operation is performed. (8) generates a transmission carrier wave of the transmission unit (7)
The PLL synthesizer circuit generates a predetermined frequency based on the channel data from the control circuit (2). (9)
Is a dial signal generation circuit that generates a pulse or tone dial signal based on the dialed telephone number data transmitted from the slave unit. The signal is generated under the control of the control circuit (2), and the line connection circuit It is sent to the telephone line (L) via (4). The line connection circuit (4) is composed of a relay contact circuit for making a line connection and an incoming call detection circuit. The line connection circuit (4) makes a line connection under the control of the control circuit (2) and supplies an incoming call detection signal to the control circuit (2). ing.

FIG. 2 is a diagram showing the configuration of the child device (10). The same components as the parent device (1) are indicated by adding a dash to the drawing number of the parent device (1), The different points will be explained.

An audio circuit (11) supplies an audio signal from the receiving section (3 ') to the speaker (12) and an audio signal from the microphone (13) to the transmitting section (7'). Further, the call signal from the control circuit (2) is supplied to the speaker (12),
Notify the incoming call. (14) is a keyboard including a communication key for off-hook, a numeric keypad for inputting a dial number, a power switch, etc., and supplies a key signal to the control circuit (2 ').

Next, the operation of the present invention having such a configuration will be described.

Now, as shown in FIG. 3, one master unit (1) and one slave unit (10) (1
0 ') A system consisting of two units will be described. First, in the standby state, both the master unit (1) and the slave units (10) and (10 ') are in the operating state only for the receiving section, and the control circuit (2) of the master unit (1) performs the steps (S1) ( In S2), it is repeatedly detected whether or not there is an incoming call detection signal from the line connection circuit (4) and whether or not an outgoing signal from the slave units (10) and (10 ') is received. (See FIG. 7).

Therefore, the control circuit (2) that has received an incoming call at step (S1) detects the incoming call and proceeds to step (S3) to drive the transmitter (7) to an operating state and to control and control the PLL synthesizer circuit (8). After setting the channel frequency, the process proceeds to step (S4) to generate a calling signal and call channel information, and supply the call signal and the call channel information to the transmitting unit (7) via the modem circuit (5), thereby the slave units (10) (10 '). (See FIG. 4). The call signal is a call signal (1) to the handset (10).
Is generated first, and then the call signal (2) to the slave unit (10 ') is generated, and the signals are alternately transmitted until there is a response from the slave unit (10) (10'). Therefore, the step (S1
In the slave units (10) and (10 ') that have received the call signals (1) and (2) from the master unit (1) in 00), the steps (S10 and S10) are performed.
Since the response signals (1) and (2) are transmitted to the master unit (1) in 2), the control circuit (2) that has detected the response signals (1) and (2) in step (S5) proceeds to step (S6). The transmission of the advance call signals (1) and (2) is stopped, and then the PLL synthesizer circuits (6) and (8) are controlled to shift to the selected speech channel. At the same time, the control circuits (2 ') of the slaves (10), (10') which detect the stoppage of the calling signals (1) (2) are also stepped based on the communication channel information transmitted from the master (1). In (S103), PLL synthesizer circuit (6 ')
(8 ') is controlled to set the same communication channel as the base unit (1). The control circuit (2) of the master unit (1) that has shifted to the call channel then proceeds to step (S7) to send the transmission permission signals (1) and (2) through the call channel to the slave unit (10).
Send to (10). The control circuit (2 ') of the child device (10) (10'), which has received the transmission permission signal (1) (2) in step (S104), drives the speaker (12) in step (S105) to receive an incoming call. Is transmitted, and response signals (1) and (2) are transmitted to the master unit (1) in step (S106). Then, the control circuit (2) of the master unit (1), which has received the response signals (1) and (2) from the slave units (10) and (10 ') in step (S8), proceeds to step (S9) and returns the response signal ( 1) It is detected whether or not all the response signals (1) and (2) are received, and when the reception of all the response signals (1) and (2) is detected, the process proceeds to step (S10), but all the response signals (1) and (2) are received. If not detected, go to step (S18).

If all response signals (1) and (2) can be detected now,
The control circuit (2) of the master unit (1) detects whether or not the off-hook signals (1) and (2) from the slave units (10) and (10 ') have been received in step (S10), and cannot detect them. In the case of step (S11), it is detected whether or not the incoming bell signal has ended. As long as the bell signal continues, the control circuit (2) repeats the processing of steps (S10) and (S11). Therefore, when the person who notices the incoming call responds with the child device (10) and operates the call key on the keyboard (14) at the child device (10) (10 ') that is informing of the incoming call, the step (S1
The control circuit (2 ') of the child device (10), which has detected the call key signal in 07), stops driving the speaker (12) in step (S109), stops the incoming call notification, and then proceeds to step (S10). A forward off-hook signal (1) is transmitted to the master unit (1). Therefore, the control circuit (2) of the parent device (1) that detects the off-hook signal (1) in step (S10) stops the transmission of the transmission permission signal in step (S13), and then in step (S14).
Then, the line connection circuit (4) is controlled to connect the line and the call start signal (1) to the handset (10) is transmitted.
The control circuit (2 ′) of the child device (10) that detects the call start signal (1) in step (S111) can operate the speaker (12) and the microphone (13) by controlling the voice circuit (11). By this, the person of the child device (10) can make a call. On the other hand, a call start signal (1) to the handset (10)
In the slave unit (10 ') that has detected "," driving of the speaker (12) is stopped and a busy state is set. When the call ends and the end key is operated on the handset (10), the end signal is transmitted from the handset (10) in step (S115).
The control circuit (2) of the master unit (1) detected in 6) controls the line connection circuit (4) in step (S17) to disconnect the line and returns to the standby state. In addition, the incoming call
When the caller hangs up, it is detected that the bell signal has disappeared because no one of the slave units (10) and (10 ') responded while the 0) (10') was notified. The control circuit (2) of the master unit (1) that has detected that the transmission has been stopped in step S11 proceeds from step (S11) to step (S12), and stops transmission of the transmission permission signals (1) and (2), Since the line is disconnected and the standby state is restored in (S17), the control circuit (2 ') of the slave unit (10) (10') which detects the stop of the transmission permission signal (1) (2) in step (S108). ) Is the step (S1
The driving of the speaker (12) is stopped at 16) to terminate the incoming call notification.

In the above description, the case where the handset (10) answers the incoming call, but the handset (10 ') can also respond in the same manner as the handset (10). The machine (10) is set to busy.

Next, when there is an incoming call, the power of the slave unit (10 ') is turned off, and only the slave unit (10) responds to the call signals (1) and (2) from the master unit (1). Now, the operation of a person who notices an incoming call to answer the incoming call at the slave unit (10 ') whose power is OPF will be described with reference to FIGS. 5 and 7 to 11.

First, if there is no response from any of the slaves, the control circuit (2) of the master (1) will detect that all the response signals could not be received in step (S9), and step (S18).
Proceed to and set the control channel by controlling the PLL synthesizer circuits (6) and (8), and then step (S19) (S2
In (0), it detects for a predetermined time whether or not there is a response from the slave unit (10 ') whose power has been turned off. If it cannot be detected, the process proceeds to step (S21) to set the call channel selected first, and then Then, in steps (22) to (24), it is detected whether or not the off-hook signal (1) from the slave unit (10) is received for a predetermined time. Then, if the control circuit (2) cannot detect even after a lapse of a predetermined time, the control circuit (2) returns to step (S18) to set the control channel again, and detects the response from the slave unit (10 '). In this way, the control circuit (2) of the parent device (1) repeats the processing of steps (S18) to (S24) until it detects it in step (S19) or step (S22), Detection is performed by alternately switching to a call channel for a predetermined time (see FIG. 5).

Therefore, when the person of the child device (10 ') turns on the power switch and operates the call key to respond, the control circuit (2') of the child device (10 ') which has detected the off-hook in step (S101) causes the step ( Since the transmission signal is transmitted through the control channel in S17), the control circuit (2) of the master unit (1), which has detected the response of the slave unit (10 ') in step (S19), executes the step (S2).
Proceed to step 5) to transmit the call channel information to the handset (10 '), and when the response of the handset (10') is detected in step (S26), the call channel is switched to in step (S27), and then to step (S14). The lead line is connected and the call start signal (2) is transmitted. On the other hand, when the handset unit (10 ') receives the call channel information from the base unit (1) in step (S118), it sets the specified call channel and then sends the response signal (2) to the base unit (1). To do. Subsequently, the control circuit (2) of the child device (10 '), which receives the call start signal (2) from the parent device (1) in step (S120), controls the voice circuit (11) to set the call enable state. To do. Thus, the incoming power is OF
The handset (10 ') that has been F can answer the incoming call. At this time, the child device (10) is set to the busy state.

Even in this case, if the slave unit (10) responds, step (S2
The control circuit (2), which has detected the off-hook of the child device (10) in 2), proceeds to step (S14) from step (S22), and talks with the caller using the child device (10) in the same manner as described above. be able to.

Further, in the above description, the power supply of the slave unit (10 ') is OFF, but even when the slave unit (10) is OFF, the slave unit (10) is the same.
You can answer a call and make a call.

Next, the operation of dialing from the slave unit in the standby state will be described with reference to FIGS. 6 and 7 to 11.

For dialing, when the call key of the keyboard (14) of the handset (10) is operated, the control circuit (2 ') of the handset (10), which has detected the key signal in step (S101), proceeds to step (117).
The transmission signal is transmitted to the master unit (1) via the control channel. Therefore, the control circuit (2) of the master unit (1) that has detected the outgoing signal in step (S2) proceeds to step (S28),
Send the call channel information to the handset (10), and then the handset (10)
When the response signal of is detected in step (S29), the call channel is set in step (S30) and then in step (S31).
Then, the line connection circuit (4) is controlled to connect the line, and a call start signal is transmitted to the handset (10). As a result, in the slave unit (10), the voice circuit (11) is controlled and the speaker (12) is driven in step (S121), so that the dial tone from the exchange is connected to the slave unit (10) from the master unit (1) by the line connection. ) Is transmitted to the speaker (12) and is generated by the speaker (12), so when the dial tone is confirmed and the dial number is entered using the ten-key pad on the keyboard (14), the control circuit (2 ') of the child device (10) performs step (S123). Since the dial number data is transmitted to the master unit (1) with, the control circuit (2) of the master unit (1) that has detected the dial number data in step (S32) proceeds to step (S33) and the dial signal generation circuit ( 9) Controls and generates a dial signal to generate a telephone line (L)
Send to. If the other party responds to the dial call, you can talk.

In the above description, the number of slave units is two, but the control can be performed in the same manner even when there are a plurality of slave units, and any of the slave units can send and receive signals.

(G) Effect of the Invention As described above, in the wireless telephone device of the present invention, when the incoming call is received, the control means of the parent device, which has detected that there is a child device that does not answer the call from the parent device, sets the control channel and the call channel. The mutual search is configured so that if the power of the slave unit is turned off and the slave unit that could not answer the call from the master unit is turned on, it will be detected when the control channel is searched. The existing handset can respond to incoming calls, which improves usability and has a very practical effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a master unit of a wireless telephone device of the present invention, and FIG. 2 is a block diagram showing a configuration of a slave unit of the same.
FIG. 3 is a block diagram showing the system configuration of the present invention, and FIG.
FIGS. 5, 5 and 6 are time charts showing the operating states of FIGS. 1 and 2, FIGS. 7, 8 and 9 are flowcharts showing the operating states of FIG. 1, and FIG. FIG. 11 is a flowchart showing the operating state of FIG. 2, FIG. 12 is a block diagram showing the system configuration of a conventional radiotelephone device, and FIG. 13 is a time chart showing the operating state of FIG. (1) …… Main unit, (2) (2 ′) …… Control circuit, (3)
(3 ′) …… Reception unit, (4) …… Line connection circuit, (5)
(5 ') ... Modem circuit, (6) (6') (8)
(8 ') ... PLL synthesizer circuit, (7) (7') ...
… Transmitter, (9) …… Dial signal generator, (10)…
… Handset, (11) …… Voice circuit, (14) …… Keyboard.

Claims (1)

[Claims] 1. When an incoming call is received, a call signal including information on a call channel selected for each child device is transmitted from a parent device on a control channel, and each child device sends a response signal on a control channel in response to the calling signal. The master unit, which transmits and shifts to the selected call channel, receives the response signal, shifts to the selected call channel, transmits an incoming call instruction signal to each slave unit on the call channel, and sends an off-hook signal on the selected call channel. In the wireless telephone device that selects the slave unit that has transmitted the off-hook signal when receiving, if there is a slave device that does not receive the response signal, it is determined whether the off-hook signal is received on the selected communication channel. It is determined whether or not the outgoing signal is received on the control channel, and when the outgoing signal is first received on the control channel, the outgoing signal is sent. A wireless telephone device characterized by selecting a child device.