JP2513856B2 - Cordless phone - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cordless telephone.

<Prior Art> Generally, a cordless telephone uses a rechargeable secondary battery as a power source of a slave unit, and performs an intermittent reception operation in order to reduce consumption of the battery. That is, the standby operation that supplies power to the entire receiver system and waits in a state where radio waves from the parent device can be received, and cuts off the power supply except for the minimum necessary circuits such as timers to reduce power consumption extremely. The resting operation in which the amount is kept small is alternately repeated.

As a cordless telephone of this type, conventionally, communication is performed between a master unit and a slave unit by a multi-channel access (MCA) method using a control channel (hereinafter, channel is abbreviated as CH) and a call CH. There are things I tried to do.

4 and 5 show the incoming call control procedure and the outgoing call control procedure of the conventional cordless telephone set, respectively.

In the incoming call procedure shown in FIG. 4, the base unit normally makes an idle call.
Repeated operation of CH search and control CH reception. That is, the current open call for use during the call
One or more CHs should be stored, and while the control CH receives the call signal from the slave unit, it should be possible to go to check the status of the stored empty call CHs at that time intermittently for a short period of time. Is repeating. On the other hand, the slave unit is performing the above-mentioned intermittent reception operation on the control CH.

Now, when a call signal (16Hz) is input from the exchange to the base unit, the base unit detects an incoming call, first detects the vacancy of the control CH, and then sends an incoming call signal to the handset on the vacant control CH. To do. Upon detecting the incoming call signal, the child device transmits an incoming call response signal to the parent device. When the master unit detects the incoming call response signal from the slave unit, it switches the CH to the designated call CH and confirms the availability of the call CH. Similarly, the slave unit also switches the CH to the designated call CH, confirms that the call CH is free, and then transmits a CH switching completion signal to the master unit. Then, when the master unit detects this CH switching completion signal, the call CH is determined. After the call CH is determined, the call CH mode in which a bell ringing signal, an off-hook signal, and a voice circuit ON signal are transmitted is entered.

On the other hand, in the outgoing call control procedure of FIG. 5, as in the case of the incoming call control procedure, the master unit repeatedly performs idle call CH search and control CH reception, and the slave unit performs control CH intermittent reception. There is. Now, when the cordless handset goes off-hook,
The control CH is detected to be vacant, and a call signal is sent to the master unit on the vacant control CH. When the base unit detects this call signal, it sends a call response signal to the handset unit, switches the CH to the designated call CH, and confirms the availability of the call CH. Upon detecting the call response signal from the master, the slave switches the CH to the designated call CH, confirms that the call CH is empty, and then sends a CH switching completion signal to the master. Then, when the master unit detects this CH switching completion signal, the call CH is determined. When the call channel is confirmed,
After that, it enters the call CH mode that sends the voice circuit ON signal, dial tone, and dial signal.

<Problems to be Solved by the Invention> By the way, in the above conventional cordless telephone,
When performing an intermittent reception operation, for example, when a standby operation of 100 msec and a pause operation of 900 msec are alternately repeated, a non-response time of up to 900 msec occurs for a call from the master unit, and it takes a long connection time. There's a problem.
On the other hand, if continuous reception is performed to shorten the connection time, the battery will be consumed more and the life of the battery will be shortened, or the charging time will be longer when charging.
Also, when connecting to a wireless CH, at the control CH stage, the receiving PLL synthesizer lock time, CH vacancy detection time, transmitting PL
It takes a long time for the lock time of the L synthesizer and the exchange time of the data signal to be accumulated, and it takes a long time to switch to the call channel, and when the control channel is busy, it will not be possible to transmit until it becomes empty, so the connection time will be even longer. There's a problem.

Therefore, an object of the present invention is to provide a cordless telephone that can shorten the connection time, reduce the battery consumption, and shorten the charging time.

<Means for Solving the Problems> In order to achieve the above object, the present invention comprises a master unit connected to a telephone line and a slave unit wirelessly connected to the master unit. With the multi-channel access (MCA) method to communicate with the device using the control CH and call CH, while the child device has a rechargeable power source and the parent device charges the power source. The charging device has a charging power supply unit, the master unit and the slave unit are connected via charging terminals provided on the master unit and the slave unit, respectively, and the charging power supply unit connects the charging terminal via the charging terminal. In a cordless phone that is configured to charge the above rechargeable power source, each of the parent device and the child device has available call CH data indicating which call channel is available from the parent device to the child device and an incoming call. Control data terminal for transmitting incoming data that indicates that , Provided with a charging detection unit connected to the charging terminal to detect whether the rechargeable power source is charging, and in the parent device, when it detects that the charging detection unit of the parent device is charging , After transmitting the idle call CH data to the slave unit through the control data terminal, and when an incoming call is received, the incoming call data is transmitted to the slave unit through the control data terminal and the idle call CH data is transmitted. Select the wireless connection mode in the idle call CH indicated by, and when the charging detection unit of the base unit does not detect that charging is in progress, the control means for selecting the wireless connection mode in the idle call CH When the incoming detection data is received from the parent device after setting the receiving unit to the continuous detection mode when the charging detection unit of the child device detects that the charging is being performed, or , Of the above A control means is provided for changing the reception mode to the continuous reception operation mode and for selecting the wireless connection mode in the idle call CH notified from the base unit when the power detection unit does not detect that the battery is being charged. It is characterized by that.

<Operation> Normally, while waiting for an incoming call, the slave unit is connected to the master unit to charge the power source of the slave unit. In this way, when the charging terminals and the control data terminals are connected to each other to charge the power source of the slave unit by the charging power source unit of the master unit, the charge detection units of the master unit and the slave unit respectively charge. Detect that it is inside. Then,
The control means of the master unit transmits the idle call CH data to the slave unit via the control data terminal, and then transmits the incoming call data to the slave unit via the control data terminal when there is an incoming call and the idle call CH data Select the wireless connection mode for the idle call channel indicated by. On the other hand, when the control means of the slave unit receives the incoming data from the master unit after setting the reception mode to the continuous pause operation mode, it changes the reception mode to the continuous reception operation mode and is notified from the master unit. Select the wireless connection mode for idle call channels. Therefore, the power is not supplied to the receiver while charging and waiting for an incoming call.
The power consumption is low, and therefore the charging time is short. Then, when there is an incoming call, the slave unit enters the continuous reception operation mode, so there is no non-response time as in the conventional example,
Further, since the wireless connection mode is directly entered in the idle call CH without performing communication by the control CH, the connection time is shortened.

On the other hand, when the slave unit is removed from the master unit while waiting for an incoming call during charging, the charge detection units of the master unit and the slave unit no longer detect charging. Then, the control means of the master unit selects the wireless connection mode in the idle call channel, while the control means of the slave device changes the reception mode to the continuous reception operation mode and selects the wireless connection mode in the idle call channel. To do. Therefore, even when the slave unit is detached from the master unit and transmitted, the connection time is shortened because the wireless connection mode is directly entered in the idle call channel without performing communication by the control CH.

When the slave unit is separated from the master unit and not charged, the slave unit performs the intermittent reception operation.

<Example> Hereinafter, the present invention will be described in detail with reference to illustrated examples.

FIG. 1 is a block diagram showing the circuit configuration of an embodiment of the cordless telephone of the present invention.

This cordless telephone is composed of a master unit 1 and a slave unit 2. When the slave unit 2 is placed on the master unit 1, control data terminals 41, 42 and charging terminals provided on the master unit 1 and the slave unit 2, respectively. Four
3, 44 and ground terminals 45, 46 are connected to each other.

The base unit 1 is a wired telephone unit 11 connected to the office line 3.
A control unit 12 for controlling the entire apparatus, a receiving unit 13, a receiving synthesizer unit 14, a transmitting synthesizer unit 15, and a transmitting unit 16. In addition, a power supply unit 17 connected to the AC100V power supply, a charging power supply unit 18 for supplying charging power to the power supply battery of the child device 2, and a signal indicating whether or not charging is detected by detecting a charging current. A charge detection unit 19 that outputs to the control unit 12 is provided.

The slave unit 2 includes a communication unit 21, a transmitting synthesizer unit 22, a receiving synthesizer unit 23, a receiving unit 24, a control unit 25 for controlling the entire device, a microphone unit 26, and a key unit 27.
And a speaker unit 28. In addition, a charging detection unit 29 that is connected to the charging terminal 44, detects a charging voltage, and outputs a signal indicating whether or not charging is in progress to the control unit 25, and a charging terminal 44.
The charging circuit 30 is connected to the charging circuit 30 and charges the battery unit 31.

2 and 3 show the incoming call control procedure and the outgoing call control procedure of the cordless telephone of this embodiment, respectively.

In the receiving means of FIG. 2, during the standby operation,
The base unit 1 normally carries out a repetitive operation of searching for a free call channel and receiving a control channel. That is, one or more currently available call CHs are stored for use during a call, and control is performed.
While waiting for a call signal from the handset 2 on the CH, the CPU repeatedly repeats intermittently for a short time to inspect the state of the stored idle call CH at that time. For example, the control CH reception of 900 msec and the idle call CH inspection of 100 msec are alternately repeated. On the other hand, the slave unit is performing the above-mentioned intermittent reception operation on the control CH.

Now, when the slave unit 2 is connected to the master unit 1 and charged, the master unit 1
And the charging detection units 19 and 29 of the slave unit 2 respectively detect that charging is in progress, and inform the control units 12 and 25 of that. Then, the base unit 1 transmits the idle call CH data from the control unit 12 to the control unit 25 of the handset 2 via the control data terminals 41 and 42, then stops the control CH reception and only performs the idle call CH search. , Send idle call CH data to handset 2. on the other hand,
When the handset 2 receives free call CH data from the main device 1 during charging, it stores the free call CH, stops the intermittent reception operation on the control CH, and the control unit 25 operates but the receiving unit 24 and No power is supplied to the receiving synthesizer unit 23, and a pause operation state is set during charging.

When a ringing signal (16 Hz) is input from the exchange to the base unit 1 during the standby operation during charging, the base unit 1 detects an incoming call by the incoming call detection unit in the wired telephone unit 11, and the incoming call is received. Is output to the control unit 12. When the control unit 12 detects an incoming call, it receives incoming call data via the control data terminals 41 and 42.
To the control unit 25, and prior to the transmission of the radio wave, reception is performed by the idle call CH designated for the handset 2 and the availability of the idle call CH is confirmed. On the other hand, when the handset 2 detects the incoming call data, it stops the charging pause operation and shifts to the continuous reception operation. Then, prior to the radio wave transmission, reception is performed by the designated call CH, after confirming that the call CH is empty, radio waves are emitted and a CH switching completion signal is transmitted to the master unit 1. The base unit 1 detects the CH switching completion signal to establish the call CH. In this series of operations, the radio control CH is not passed.

When the call CH is determined, the call CH mode for transmitting a bell ringing signal, an off-hook signal, and a voice circuit ON signal is entered, as in the conventional example shown in FIG.

On the other hand, in the call origination control procedure of FIG. 3, the operation up to picking up the slave unit 2 being charged from the master unit 1 is similar to that of the call arrival control procedure of FIG. Now, when the slave unit 2 being charged is taken up in the charging standby mode, the charge detection units 19 and 29 of the master unit 1 and the slave unit 2 detect charging OFF, and the control unit 12 and 29 respectively detect this. Let 25 know. When the control unit 12 of the base unit 1 detects that the charging is turned off from the charging state, the control unit 12 of the base unit 1 performs reception by the idle call CH specified in the handset 2 prior to the radio signal, and confirms the availability of the call CH. On the other hand, when the handset 2 detects that the charging is turned off and the charging is turned off, the charging pause operation is stopped and the continuous reception operation is started. Then, prior to the radio wave transmission, the reception by the designated call channel is performed,
After confirming the vacancy of the call channel, radio waves are emitted and a CH switching completion signal is transmitted to base unit 1. The base unit 1 detects the CH switching completion signal to establish the call CH. Even in this series of operations, the radio control CH is not passed.

When the call channel is established, the call channel mode for transmitting the voice circuit ON signal, dial tone, and dial signal is entered, as in the conventional example shown in FIG.

When the slave unit is not placed in the master unit and is not being charged, it operates according to the incoming call control procedure shown in FIG. 4 and the outgoing call control procedure shown in FIG.

As described above, while the slave unit 2 is being charged by the master unit 1, the idle call CH data is sent from the master unit to the slave unit through the control data terminals 41 and 42. Four
Since the handset unit 1 is set to the continuous reception operation state through 1,42, there is no non-response time as in the conventional example, and the connection time is shortened because the connection operation is performed by the direct communication CH without passing through the control CH. In addition, during charging, the slave unit is in the charging inactive mode, and the control unit 25 is operating, but power is not supplied to the receiving unit 24 and the receiving synthesizer unit 23, so that power consumption can be reduced, and therefore the charging time is also reduced. Can be shortened.

<Effects of the Invention> As is apparent from the above, in the cordless telephone of the present invention, when the power source of the child device is being charged by the charging power source of the parent device, the parent device sends idle call CH data to the child device. If there is an incoming call, the incoming data will be transmitted to the slave unit and the wireless connection mode for the idle call CH indicated by the idle call CH data will be selected, and the slave unit will continuously suspend the receiving mode. After receiving the incoming call data from the base unit after switching to the mode, or when charging is stopped, the reception mode is changed to the continuous reception operation mode and the radio on the idle call channel notified from the base unit is set. Since the connection mode is selected, the power is not consumed to the receiver while charging and waiting for an incoming call.
Therefore, the charging time is shortened. Also, if there is an incoming call during charging, the slave unit will be in continuous reception operation mode, so there will be no non-response time as in the conventional example, and there will be no direct call CH without communication with the control CH. Since the wireless connection mode is entered, the connection time is shortened. Further, even when the slave unit is detached from the master unit and transmission is performed, the connection time is shortened because the wireless connection mode is directly entered in the idle call channel without performing the transmission by the control CH.

[Brief description of drawings]

1 is a block diagram showing a circuit configuration of an embodiment of the present invention, FIG. 2 is a diagram showing an incoming call control procedure in the above embodiment, FIG. 3 is a diagram showing an outgoing call control procedure in the above embodiment, and FIG. FIG. 5 is a diagram showing an incoming call control means in the conventional example, and FIG. 5 is a diagram showing an outgoing call control procedure in the conventional example. 1 ... Main unit, 2 ... Slave unit, 12,25 ... Control unit, 13,24 ... Reception unit, 16,21 ... Transmission unit, 18 ... Charging power supply unit, 19,29 ... Charging Detection unit, 30 ... Charging circuit, 31 ... Battery unit, 41,42 ... Control data terminal, 43,44 ... Charging terminal.

Claims (1)

(57) [Claims] 1. A master unit connected to a telephone line, and a slave unit wirelessly connected to the master unit. Between the master unit and the slave unit, a multi-channel access (MCA) method is used.
While performing communication using a control channel and a call channel, the slave unit has a chargeable power source, and the master unit has a charging power supply unit for charging the power source. In a cordless telephone configured to be connected via charging terminals provided in each of the parent device and the child device, and to charge the rechargeable power source via the charging terminals by the charging power source unit. , A control data terminal for transmitting to each of the master unit and the slave unit empty call channel data indicating which call channel is available from the master unit to the slave unit and incoming call data indicating that an incoming call has been received. A charging detection unit that is connected to the charging terminal and detects whether the rechargeable power source is charging, and if the charging detection unit of the parent device detects that the charging detection unit of the parent device is charging After transmitting the empty call channel data to the slave unit via the control data terminal, when an incoming call is received, the incoming call data is transmitted to the slave unit via the control data terminal and the empty call channel data is transmitted. A control means is provided for selecting a wireless connection mode for the indicated empty call channel and for selecting the wireless connection mode for the idle call channel when the charging detection unit of the master unit does not detect that charging is being performed. In the slave unit, when the charging detection unit of the slave unit detects that charging is in progress, after setting the reception mode to the continuous suspension operation mode, when receiving incoming data from the master unit,
Alternatively, when the charging detection unit of the slave unit does not detect that charging is being performed, the reception mode is changed to the continuous reception operation mode and the wireless connection mode on the idle call channel notified from the master unit is selected. A cordless telephone characterized in that it is provided with a control means for controlling.