JPH0678035A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To expand a range capable of properly executing talking by wiring and connecting an extended antenna unit for transmitting/ receiving a talking signal between a master set and a slave set. CONSTITUTION:The master set 1 is provided with a communication control part 10, a wireless transmitting/receiving part 11 for transmitting/receiving a talking signal to/from the slave set 3, a transmission unit 14, etc., and the unit 14 mutually transmits a talking signal or a control signal for controlling the extended antenna unit 2. The unit 14 supplies also power necessary for driving the unit 2. The unit 2 is connected to the master set 1 through a wiring C and provided with a transmission unit 20, a wireless transmitting/receiving part 21, a signal processing part 22, and so on. Only at the time of receiving a prescribed control command from the master set 1, the unit 2 executes communication with the slave set 3. When the slave set 3 is carried to a position tar from the installed position of the master set 1 and can not properly receive a signal from the master set 1, the unit 2 arranged near the slave set 3 is driven and signals are mutually transmitted between the slave set 3 and the unit 2.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to improvements in cordless telephone systems.

[0002]

2. Description of the Related Art Conventionally, a cordless telephone system of this type is composed of both a base unit connected to a telephone line and a cordless handset, and when a call is made using the handset, the base unit and the handset are connected to each other. It was only configured to transmit and receive wireless signals between the two.

[0003]

In this type of cordless telephone system, in order to make a good call using the cordless handset,
It is necessary to consider the installation location of the master unit so that the wireless signal transmission / reception sensitivity between the slave unit and the master unit is good. However, unlike the slave unit, the master unit needs to be wired and connected to the line and the power supply, and is usually considerably larger than the slave unit. It is not always possible to install the wireless signal to the child device optimally, such as in the vicinity, inside the telephone line drop protector, or in a closet or a storage room. In such a case, conventionally, it is not possible to transmit a predetermined wireless signal from the base unit to a wide range in the house, so the call range using the handset is limited and noise such as noise may occur during a call. There was a problem with the call.

The present invention has been proposed in view of the above-mentioned points, and even if the base unit is installed in a place unsuitable for transmitting and receiving wireless signals, a call using the handset can be appropriately performed. It is an object of the present invention to provide a cordless telephone system capable of widening the range.

[0005]

SUMMARY OF THE INVENTION A cordless telephone system according to the present invention, which is proposed to achieve the above object, is a cordless telephone system, which is used as a base unit for a cordless telephone and a cordless handset. This is a configuration in which an additional antenna unit that transmits and receives wireless signals is connected by wiring. As a specific aspect of the cordless telephone system according to the present invention described in claim 1, as described in claim 2, the master unit and the additional antenna unit are wireless signals transmitted between the slave unit. Is configured to be selectively transmitted or received, or as described in claim 3, the master unit is not provided with means for transmitting and receiving wireless signals, and only between the extension antenna unit and the slave unit. It is configured to send and receive wireless signals.

A cordless telephone system according to a fourth aspect of the present invention is the cordless telephone system according to any one of the first to third aspects, wherein a plurality of the additional antenna units are connected to a single master unit. In addition, the control channels of wireless signals transmitted and received between the plurality of additional antenna units and the slaves are different between the additional antenna units. A cordless telephone system according to a fifth aspect of the present invention is the cordless telephone system according to any one of the first to third aspects, wherein a plurality of the additional antenna units are connected to a single master unit. At the same time, the transmission timing of the control signal wirelessly transmitted from each of the additional antenna units to the plurality of slave units corresponding to the additional antenna unit is configured to be different for each additional antenna unit.

[0007]

In the cordless telephone system according to the present invention as set forth in claim 1, which is characterized in that the predetermined wireless communication signal can be transmitted and received between both the handset and the additional antenna unit. Even if it is not possible to properly perform the specified wireless communication between the slave unit and the slave unit, by installing the extension antenna unit in a suitable place for transmitting and receiving wireless signals with the slave unit, the slave unit can be used. The appropriate call can be made. Therefore, even if the transmission range of the wireless signal from the base unit is narrow, such as when the base unit is installed in a telephone line drop protector, by using the extension antenna unit, the slave unit can be used. The available communication range can be expanded.

Further, in the configuration of claim 2, it is possible to select one of the parent device and the additional antenna unit that can transmit / receive the wireless signal in the best state between the child device and the extension device, and therefore it takes such a configuration. The call range can be expanded by efficiently using both the base unit and the additional antenna unit. On the other hand, in the configuration of claim 3, wireless signals are transmitted and received only between the additional antenna unit and the slave unit, but since the master unit is not provided with means for transmitting and receiving wireless signals, The configuration of the parent device becomes simple.

In the cordless telephone system according to the present invention as set forth in claim 4, a call using the slave unit can be performed by using the extension antenna unit installed at the optimum location among the plurality of extension antenna units installed. However, it is possible to perform transmission / reception of wireless signals to / from the extension antenna unit because the control channels of the wireless signals transmitted / received between the extension antenna unit and the slave unit differ between the extension antenna units. It is possible to limit the child devices that can be used, and it is possible to use the extension antenna unit and the child device in association with each other.

Also, in the cordless telephone system according to the present invention as defined in claim 5, as in the case of claim 4, a plurality of extension antenna units can be used to make a call using a slave unit. When transmitting a control signal for executing a call from the additional antenna units of the above to a plurality of slave units, it is possible to avoid that a predetermined control signal is simultaneously transmitted from a plurality of additional antenna units to the plurality of slave units. ,
Crosstalk of control signals between the plurality of additional antenna units and the slave unit can be eliminated, and malfunction of the slave unit can be prevented.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. [First embodiment (corresponding to claims 1 and 2) FIG. 1 is a perspective view showing an example of a cordless telephone system S according to the present invention.
FIG. 3 is a block diagram showing an example of the hardware configuration. The cordless telephone system S includes a master device 1 connected to a telephone line L, an extension antenna unit 2 connected to the master device 1 via a wiring C, and a cordless telephone slave device 3.

Of the above, the base unit 1 is of a type that is equipped with a handset or a numeric keypad for dial operation and can be used as a telephone; There are two types of types, but any type may be used in the present invention. As shown in FIG. 2, the master unit 1 is connected to a telephone line L and performs a communication control unit 10 for performing desired communication control such as connection and disconnection of the line.
The wireless transmission / reception unit 11 for transmitting / receiving the wireless communication signal to / from the child device 3 via the antenna ANT1, the signal processing unit 12 including a CPU for controlling each unit, the ROM and the RAM. System memory 1
3 and other various circuit devices necessary for the telephone, that is, for example, a dial pulse generation circuit, a polarity inversion detection circuit (neither is shown), and the like. In addition to these, a transmission unit 14 is also provided. The transmission unit 14 has a function of controlling mutual transmission of a call signal for making a call and a control signal for controlling the additional antenna unit 2. Also, from the transmission unit 14 side to the extension antenna unit 2,
The power required for driving the additional antenna unit 2 is also configured to be supplied via the wiring C.

The extension antenna unit 2 has an antenna ANT2 between the main unit 1 and a transmission unit 20 for performing a transmission control process of a predetermined signal, which is executed via the wiring C, and a slave unit 3.
A wireless transmission / reception unit 21 for transmitting / receiving a wireless signal for communication via a telephone, a signal processing unit 22 for controlling these, a system memory 23, and the like. This extension antenna unit 2 is a slave unit 3 according to a control command transmitted from the master unit 1 via the wiring C.
The wireless transmission / reception of a voice signal for executing a call and a control signal for calling or holding the slave unit 3 is performed. However, the additional antenna unit 2 does not normally perform wireless communication with the child device 3 and executes wireless communication with the child device 3 only when a predetermined control command is received from the parent device 1. The additional antenna unit 2 and the master device 1 are configured to selectively perform wireless communication with the slave device 3. Of both the extension antenna unit 2 and the base unit 1,
Which of the slaves 3 is to be wirelessly communicated with is configured to be able to be operated by, for example, operating a switch provided in the master 1 or the additional antenna unit 2 or operating a key of the slave 3.

The slave unit 3 is provided with a wireless transmitting / receiving unit 30, a signal processing unit 31, a microphone MC and a speaker SP for transmitting / receiving a predetermined wireless signal to / from the extension antenna unit 2 or the master unit 1 via the antenna ANT3. It has a communication circuit 32, a key operation unit 33 having a ten-key pad for dialing, and a system memory 34.

In the cordless telephone system S having the above-mentioned configuration, at the normal time, for example, by using the base unit 1 without using the extension antenna unit 2, the base unit 1
By transmitting and receiving a voice signal and a control signal for a call between the mobile device and the mobile device 3, a call using the mobile device 3 can be performed. When the child device 3 is carried away from the installation location of the parent device 1 and the wireless signal output from the parent device 1 cannot be properly received by the child device 3, the child device 3 is more than the parent device 1. It suffices to activate the additional antenna unit 2 existing near the child device 3 so that wireless signals are mutually transmitted between the additional antenna unit 2 and the child device 3. As a result, the additional antenna unit 2 can properly function as a repeater between the slave unit 3 and the master unit 1, and a call with good transmission / reception sensitivity and low noise can be performed.

[Second embodiment (corresponding to claim 3)] The cordless telephone system Sa shown in FIG. 3 is composed of a base unit 1a, an additional antenna unit 2, and a handset 3 as in the first embodiment. However, among these, the base unit 1a is a means for transmitting / receiving a wireless signal to / from the handset unit 3,
That is, the antenna without the antenna ANT1 and the wireless transmission / reception unit 11 shown in FIG. 2 is applied. With such a configuration, wireless communication is executed only between the extension antenna unit 2 and the child device 3, but by installing the extension antenna unit 2 at an appropriate location for transmitting and receiving a wireless signal, the child device 3 is also installed. It is possible to appropriately make a call using.

[Third embodiment (corresponding to claims 4 and 5)] The cordless telephone system Sb shown in FIG.
b, a plurality of additional antenna units 2a to 2d are connected via a wiring C, and a plurality of slave units 3a to 3h are used. Here, the additional antenna unit 2
a and 2b and the additional antenna units 2c and 2d, the frequencies of the control signals for call control transmitted and received between the slaves 3a to 3h are different from each other, and their control channels CH
1 and CH2 are set to be different from each other. Corresponding to this, among the slaves 3a to 3h, the slaves 3a to 3d are included.
The frequencies of the control signals that can be transmitted and received between the slaves 3e to 3h are also different, and the slaves 3a to 3d have control channels CH.
1 enables wireless transmission / reception only to the additional antenna units 2a and 2b, and the other handset units 3e to 3h are configured to be able to perform wireless transmission / reception only to the additional antenna units 2c and 2d by the control channel CH2. ing.

Further, each of the cordless handsets 3a to 3h has an ID code peculiar to the cordless telephone system Sb, and at the same time, an ID code peculiar to the cordless handset is also added. Each extension antenna unit 2a
.About.2d and slave units 3a to 3h are added to all control signals transmitted and received between them. Then, in the extension antenna units 2a and 2b set to the same control channel CH1, the extension antenna units 2a and 2b corresponding to these extension units 3a to
When transmitting a control signal such as a ringing signal to the 3d, FIG.
As shown in, the control signal from the additional antenna unit 2b is transmitted after the transmission of the control signal from the additional antenna unit 2a is completed,
The control signals from 2b are not transmitted at the same time. Further, the time difference setting of the transmission timing of the control signal is configured to be the same when the control signal is transmitted from the other extension antenna units 2c and 2d to the slave units 3e to 3h.

In the cordless telephone system Sb having the above structure, for example, as shown in FIG.
It is possible to use by installing a and 2b on the first floor of the house and installing other extension antenna units 2c and 2d on the second and third floors of the same house. Then, for example, when two telephone lines are used, when the telephone number of the resident on the first floor is called, the extension antenna units 2a and 2b are used to control the slave units 3a to 3d through the control channel CH1. A call signal may be transmitted. In such a case, even if the other slaves 3e to 3h are placed in a range where they can receive the ringing signal, these slaves 3e to 3h.
3h control channels are additional antenna units 2a, 2
Since CH2 does not correspond to b, these slave units 3e
It is possible to prevent erroneous incoming calls within ~ 3h.

Further, as shown in FIG. 6, the transmission of the calling signal to the slave units 3a to 3d is not performed simultaneously from the two additional antenna units 2a and 2b,
There is no fear of so-called crosstalk. The call signal is transmitted to the slaves 3a to 3d from the extension antenna unit 2a first, and accordingly, the slaves 3a to 3d are transmitted.
If there is an incoming call to any of the above, the wireless communication for a call is subsequently performed between the slave unit receiving this incoming call and the additional antenna unit 2a. Further, when there is no incoming call to any of the slaves 3a to 3d in response to the calling signal from the additional antenna unit 2a, the additional antenna unit 2b is then used.
The call signal is output from. Then, if there is an incoming call to any of the slaves 3a to 3d, thereafter, wireless communication for communication is performed between the slave and the additional antenna unit 2b. In the system Sb,
For example, one of the additional antenna units 2a and 2b may be selectively used, and the additional antenna unit on the side where the call by the handset 3 can be satisfactorily performed may be arbitrarily used.

[0021]

As can be understood from the above description, according to the cordless telephone system according to the present invention as set forth in claims 1 to 5, the master unit is installed in an inappropriate place for transmitting and receiving wireless signals. Even in such a case, it is possible to obtain a special effect that the range in which a call using the slave unit can be appropriately performed can be widened by using the additional antenna unit. In particular, according to the present invention as set forth in claim 2, since it is possible to use the side of the master unit and the additional antenna unit that is most suitable for transmitting and receiving wireless signals with the slave unit, the sensitivity of transmission and reception is further improved, and noise is improved. The advantage is that calls can be made with less number of calls. Further, according to the present invention as set forth in claim 3, since the master unit is not provided with means for transmitting and receiving wireless signals, there is an advantage that the structure of the master unit can be simplified.

According to the present invention as set forth in claims 4 and 5, by using the extension antenna unit installed at the optimum location among the plurality of extension antenna units installed, the transmission / reception sensitivity is excellent. The effect that the callable range can be further expanded is obtained. Further, according to the present invention as set forth in claim 4, it is possible to specify a slave unit capable of transmitting / receiving a wireless signal to / from a specific extension antenna unit by a control channel, and thus it is possible to use the slave unit properly. To be Further, according to the present invention as set forth in claim 5, it is possible to prevent undesired crosstalk from occurring in transmission / reception of control signals between a plurality of additional antenna units and the slave unit, and the slave unit is allowed to cross. There is an advantage that malfunctions due to talk can be avoided as much as possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cordless telephone system according to the present invention.

2 is a block diagram showing an example of a hardware configuration of the cordless telephone system shown in FIG.

FIG. 3 is a perspective view showing another embodiment of the cordless telephone system according to the present invention.

FIG. 4 is a perspective view showing another embodiment of the cordless telephone system according to the present invention.

5 is an explanatory diagram showing an example of a usage state of the cordless telephone system shown in FIG.

FIG. 6 is a time chart showing an example of a control signal output from the additional antenna unit.

[Explanation of symbols]

 1, 1a, 1b Base unit 2, 2a to 2d Extension antenna unit 3, 3a to 3h Handset 11 Wireless transceiver (base unit) 12 Signal processing unit (base unit) 14 Transmission unit (base unit) 20 Transmission unit (extension) Antenna unit 21 Wireless transmission / reception unit (extended antenna unit) 22 Signal processing unit (extension antenna unit) 30 Wireless transmission / reception unit (slave unit) 31 Signal processing unit (slave unit) ANT1 to 3 antenna C wiring S, Sa, Sb Cordless telephone system

Claims (5)

[Claims] 1. A cordless telephone system, wherein an extension antenna unit for transmitting and receiving wireless communication signals to and from a cordless telephone is wired to a parent device of the cordless telephone. 2. The cordless telephone system according to claim 1, wherein the base unit and the additional antenna unit are configured to selectively transmit and receive wireless signals to and from a handset unit. 3. The device according to claim 1, wherein the master unit does not include means for transmitting and receiving wireless signals, and is configured to be able to transmit and receive wireless signals only between both the extension antenna unit and the slave unit. A cordless telephone system characterized in that 4. The extension antenna unit according to any one of claims 1 to 3, wherein a plurality of the extension antenna units are connected to one master unit, and the extension antenna units and the slave units are connected to each other. A cordless telephone system characterized in that control channels of wireless signals transmitted and received are configured so as to be different between extension antenna units. 5. The extension antenna unit according to any one of claims 1 to 3, wherein a plurality of the extension antenna units are connected to a single master unit, and a plurality of extension antenna units corresponding to the extension antenna units are provided. The cordless telephone system is characterized in that the transmission timing of the control signal wirelessly transmitted to the slave unit is different for each extension antenna unit.