JP2929446B2 - Digital cordless telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital cordless telephone comprising a master unit and a plurality of slave units, and more particularly, to an extension call between a master unit and a slave unit and a direct call between slave units. A possible digital cordless telephone.

[0002]

2. Description of the Related Art In a digital cordless telephone comprising a master unit and a plurality of slave units, when an extension call is made between the master unit and the slave unit, a calling side calls a called side from a calling side and a call path. To implement an extension call.

When calling a master unit from a slave unit, the slave unit receives control data continuously transmitted from the master unit at fixed time intervals, and recognizes a master unit ID included in the received control data. Then, it is determined whether or not the slave unit is registered in the master unit. If the slave unit is registered, a timing for making a call request to the master unit is set.

[0004] Further, when calling a slave unit from the master unit, a call notification from the master unit is realized by incorporating the number of the calling slave unit into control data including the master unit ID transmitted by the master unit. Based on the received control data, the slave unit compares the master unit ID stored in advance with the number of the slave unit, and if the numbers match, recognizes that a call is being made, and performs control. The master unit is notified that the call has been accepted at the data timing, and at the same time, the slave unit calls the operator.

[0005] On the other hand, when a handset directly calls another handset,
The calling slave unit is independent of the control data sent by the master unit,
Using the predetermined slot and one of the carriers pre-assigned to the direct communication between handset units, the ID of the base unit that has registered its use, the handset unit number of the calling side, and the called side child unit. The call data including the machine number is continuously transmitted.
The called sub unit detects the carrier for a certain period of time, and when the ID of the parent unit that has registered its use and the sub unit number of the sub unit match, detects that the sub unit has been directly called.

When a plurality of terminal devices communicate with each other using the same frequency, each terminal device needs to alternately switch between transmission and reception in a fixed time zone for communication. This time zone is called a slot.

[0007] The handset that has detected the direct call from the handset,
At the same time as calling the operator, the fact that the call has been accepted is notified to the calling handset using the timing of the call data, synchronization is established, and a call can be made.

[0008] In order to make a call between the parent device and the child device or to make a direct telephone call between the child devices, the child device needs the parent device ID of the parent device in which the child device is registered. Normally, the master unit ID needs to be stored in a non-volatile storage medium by performing subscriber use registration between the master unit and the slave unit in advance. In the prior subscriber use registration, a method is used in which the master unit and the slave unit exchange data by wireless communication and communicate information with each other. Hereinafter, the method will be described.

[0009] The master unit continuously transmits control data indicating that the master unit is performing the subscriber use registration in a fixed time unit. The slave unit receives the control data, and recognizes information included in the control data indicating that the slave unit is a master unit that has performed subscriber use registration. At this time, when the slave unit is performing the subscriber use registration, the slave unit takes a timing for performing the subscriber use registration communication with the master unit and issues a subscriber use registration request to the master unit. Synchronize for Thereafter, necessary data is exchanged between the master unit and the slave unit, and the ID information and the like of each other are stored in the respective storage units.

[0010] In the slave unit, only one ID of the master unit is stored in advance in the subscriber use registration, and the same master unit ID is used in the case of talking with the master unit and in the case of making a direct call between the slave units. The method used is used.

[0011] Further, the carrier for making a direct call between the slave units is:
A plurality of frequencies are assigned in advance. Therefore, it is necessary for the called side to always detect whether there is a call for all frequencies. The calling handset uses one of the carriers that can be used for direct communication between handset, and sends out a call signal for 625 μsec every 5 seconds, for example. In order to receive this paging signal, the called handset assigns a receiving operation of at least 5 seconds for each carrier that can be used for direct calling between handset units for direct calling between handset units. For all the frequencies.
Thus, no matter which frequency the calling handset calls, the called handset can recognize the call.

[0012]

The above-mentioned digital cordless telephone has the following problems.

Since it is unknown which carrier is to be used for the direct communication between the slave units, it is unknown which carrier is to be used among a plurality of carriers allocated in advance for the direct communication between the slave units. It is necessary to always search for all carriers assigned for direct inter-call. Since it is necessary for the slave unit to minimize the power consumption and extend the use time of the battery to the maximum, the search for the carrier is performed at regular time intervals.
Therefore, when searching for all the carriers assigned to the direct communication between the slave units, the time required for the search becomes long, and the power consumption for the search increases.

[0014] Further, when a direct telephone call is made between slave units, it is necessary to perform subscriber use registration in one of the master units. In this case, it is impossible for the master unit to determine whether it is a subscriber use registration only for making a direct call between slave units or a subscriber use registration for enabling an extension call with the base unit. For this reason,
In the subscriber use registration, each of the master unit and the slave unit stores ID information in its own non-volatile storage medium as a slave unit capable of performing both an extension call with the master unit and a direct call between slave units. Thus, in the subscriber use registration,
It cannot be registered as a slave unit that only makes direct calls between slave units. That is, it is not possible to make an extension call with the first base unit and make a direct call between the sub units with another sub unit having the ID information of the second main unit.

Further, since the slave unit stores only one piece of ID information of the master unit, when making an extension call with a plurality of master units, it is necessary to perform subscriber use registration each time.

An object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide a digital cordless telephone in which a communication range between a child device and a parent device and a communication range between the child devices are expanded.

[0017]

SUMMARY OF THE INVENTION The present invention comprises a master unit and a plurality of slave units. The master unit communicates with each slave unit, and each slave unit communicates with each slave unit. A storage unit for storing identification information for identifying the slave unit; and a storage unit for storing, for each of the slave units registered in the own unit, a function of the slave unit, wherein the slave unit communicates with the master unit. Device communication means, one of a plurality of predetermined carriers, a communication device between child devices for communicating with another child device using the carrier, and a parent device used for communication with the parent device And a storage unit for storing identification information for identifying the mobile phone, wherein the slave unit stores in advance a type of carrier used for communication between the slave units.

Further, the present invention comprises a master unit and a plurality of slave units, and the master unit identifies slave unit communication means for communicating with each slave unit and each slave unit used for communication with the slave unit. A storage unit for storing identification information; and a storage unit for storing, for each slave unit registered in the own unit, a function of the slave unit, the slave unit includes a base unit communication unit for communicating with the master unit, One of a plurality of predetermined carriers is selected, and communication means between the slave units for communicating with another slave unit using the carrier, and identification information for identifying a master unit used for communication with the master unit And a storage means for storing the information indicating that the base unit registered in the base unit is a base unit that performs only inter-base unit communication, and the base unit stores Storage means for storing identification information for identifying a slave unit used during communication between the slave units. It is a digital cordless telephone according to claim.

Further, the present invention comprises a master unit and a plurality of slave units, and the master unit identifies slave unit communication means for communicating with each slave unit and each slave unit used for communication with the slave unit. A storage unit for storing identification information; and a storage unit for storing, for each slave unit registered in the own unit, a function of the slave unit, the slave unit includes a base unit communication unit for communicating with the master unit, One of a plurality of predetermined carriers is selected, and communication means between the slave units for communicating with another slave unit using the carrier, and identification information for identifying a master unit used for communication with the master unit A digital cordless telephone including a storage unit for storing a plurality of types of identification information used for communication with the base unit, and selecting one of the stored plurality of identification information. And a digital cordless telephone.

[0020]

According to the present invention, the slave unit stores in advance the type of carrier used for communication between slave units, and the communication means between slave units communicates with another slave unit using the stored carrier. Therefore, in the call waiting state, it is not necessary to search all of the plurality of carriers in order, it is possible to confirm whether there is a call in a relatively short time, and to reduce the power consumption in the call waiting state. Becomes possible.

Further, according to the present invention, the master unit is a slave unit registered in the master unit that performs both communication with the master unit and communication between the slave units, or a slave unit that performs only communication between slave units. It is possible to recognize whether or not the mobile device is a mobile device, so that a mobile device that performs only communication between mobile devices is not called. Since the slave unit stores the identification information used for communication between the slave units separately from the identification information used for communication with the master unit, a slave unit that performs only the communication between slave units is realized. As a result, it is possible to realize a slave unit that can perform communication with a specific master unit and can also perform inter-slave communication with a slave unit registered with another master unit.

Further, according to the present invention, since the child device stores a plurality of types of identification information used for communication with the parent device, it is possible to store identification information relating to different parent devices. The selecting means selects one of the plurality of pieces of identification information,
The parent device communication means communicates with the corresponding parent device using the selected identification information. This enables communication with a plurality of master units even with one slave unit.

[0023]

FIG. 1 is a block diagram showing the configuration of a base unit 1 of a digital cordless telephone according to an embodiment of the present invention. The transmission / reception switching circuit 12 is bidirectionally connected to the antenna 11 for transmitting or receiving radio waves.
1 is switched between transmitting the output of the transmitting circuit 13 and transmitting the input of the antenna 11 to the receiving circuit 14 in time.

An output from the transmission / reception switching circuit 12 is provided to a reception circuit 14. The reception circuit 14 amplifies the signal to a level that can be demodulated, performs necessary demodulation processing, synchronizes the data, takes out the digital data, and outputs the data to the reception data generation circuit 16. The reception data generation circuit 16 transmits the data to the extension communication means 17 based on the attribute of the data.
Alternatively, it outputs to the slave unit communication means 18.

The extension communication means 17 outputs the received data from the reception data generation circuit 16 to the transmission data generation circuit 15 in a time-shifted manner in accordance with the transmission timing of the master unit in the case of an extension call between slave units. . Also, the extension communication means 17
Is the main unit communication means 1 for an extension call between the child device and the main unit.
In addition to transmitting the received call data to the base unit 11, the call data of the base unit communication unit 111 is output to the transmission data generation circuit 15 in accordance with the transmission timing of the base unit.

The transmission data generation circuit 15 adds attributes and synchronization data necessary for output from the slave unit communication means 18, control data transmission means 19, and extension communication means 17, and outputs the data to the transmission circuit 13. The transmission circuit 13 performs modulation corresponding to the demodulation in the reception circuit 14, amplifies it to a transmission output level, and outputs it to the transmission / reception switching circuit 12.

The control data transmitting means 19 generates notification information or incoming call information indicating the configuration of the control data, and outputs the data to the transmission data generating circuit 15 at the control data transmission timing. Further, the control data transmission means 19
When performing subscriber use registration, the configuration of the control data is used for subscriber use registration based on an input from the subscriber use registration selection unit 113, and the data is output to the transmission data generation circuit 15 at the control data transmission timing.

The slave unit communication means 18 detects a command input from the slave unit in the output from the reception data generation circuit 16, analyzes the command, and in the case of a request for assignment of a carrier and slot for communication, the other party. The carrier and the slot on the side are allocated, and the notification of the slot and the carrier is sent to the slave unit 2 through the transmission data generation circuit 15. In the case of a burst signal for synchronization, a similar burst signal is transmitted to the slave unit. In the case of a command for calling from a slave to another slave, a request signal for sending control data for calling the called slave to the control data transmitting means 19 is output. In the case of a response command from the called slave, a response notification command is sent to the called slave as the transmission data generation circuit 15 to the slave, and a control for calling the control data transmitting means 19 is performed. A request signal for stopping data output is output.

Further, when there is an input for performing subscriber use registration from subscriber use registration selecting means 113, slave unit communication means 18 analyzes the subscriber use registration command from the slave unit and stores the master unit ID storage. The ID information of the slave unit is stored in the means 112, and the master device ID information of the master device ID storage means 112 is used as a subscriber use registration command.
5 is notified to the slave unit.

The timing generation means 110 is connected to each of the above-described circuits, generates a timing signal required for transmission or reception, and supplies the timing signal to each circuit.

The base unit communication means 111 is provided for the extension communication means 17.
Along with making the phone call data received from
The voice of the master unit is converted into call data and output to the extension call means 17.

The base unit ID storage unit 112 is a non-volatile storage medium for storing base unit ID information, base unit ID information, and the like.
Data, ie, information as to whether the slave unit that has registered the slave unit ID information and the subscriber use registration is a slave unit that can make extension calls or a slave unit that can only make direct calls between slave units. The information stored in 18 is output.

The subscriber use registration selecting means 113 is provided for the base unit 1
, That is, a state in which a normal call is made or a state in which a subscriber is registered for use.
8 and the control data transmitting means 19 are notified of the state.

FIG. 2 is a block diagram showing the configuration of the slave unit 2 of the digital cordless telephone according to one embodiment of the present invention. The transmission / reception switching circuit 22 is bidirectionally connected to the antenna 21 for transmitting or receiving radio waves.
1 is switched between transmitting the output of the transmitting circuit 23 and transmitting the input of the antenna 21 to the receiving circuit 24 in time. The output from the transmission / reception switching circuit 22 is provided to the reception circuit 24. The reception circuit 24 amplifies the signal to a level that can be demodulated, performs necessary demodulation processing, synchronizes the data, takes out the digital data, and extracts the data as a received data generation circuit 26
Output to

The reception data generating circuit 26 transmits the data to the control data receiving means 21 according to the attribute of the data.
2. Output to the master unit communication unit 213, the inter-slave unit communication unit 214, or the audio encoding circuit 27. The output of the microphone 210 that converts the sound into an electric signal is connected to an A / D (analog / digital) conversion circuit 28, converted into a digital signal by the A / D conversion circuit 28, and then output to the sound encoding circuit 27. Is done.

The audio encoding circuit 27 includes an A / D conversion circuit 2
8 is subjected to data compression by ADPCM conversion and output to the transmission data generation circuit 25, and of the output of the reception data generation circuit 26, only audio data is input and converted to ADPCM conversion. Data is expanded by a D / A (digital / analog) conversion circuit 2
9 is output. The D / A conversion circuit 29 converts the audio data from the audio encoding circuit 27 into an analog signal,
The sound is made at 11.

The transmission data generation circuit 25 adds necessary attributes and synchronization data to the outputs from the parent device communication means 213, the inter-child device communication means 214, and the audio encoding circuit 27, and outputs them to the transmission circuit 23. The transmission circuit 23 performs modulation corresponding to the demodulation in the reception circuit 24, amplifies the signal to a transmission output level, and outputs the amplified signal to the transmission / reception switching circuit 22.

The control data receiving means 212 receives only the control data from the master unit among the outputs of the received data generating circuit 26, and in the case of normal communication, the communication method selecting means 21
The ID information of the parent device designated by the ID No. 5 is stored in the child device ID storage means 218.
And if they match, the information is valid. In the case of the subscriber use registration, the control data from the master unit validates only the subscriber use registration information.

Further, the control data receiving means 212 receives broadcast information indicating the structure of the control data transmitted from the control data transmitting means 19 of the master unit, incoming call information, and subscriber use registration information, and receives the reception result. The timing is output to the communication method selection means 215, and the timing of the control data from the master unit is transmitted to the timing generation means 217. In the case of incoming information from the parent device, the user is notified of the reception of the call by a display means (not shown). Also, the control data receiving means 21
Reference numeral 2 has a function of starting receiving control data of the master unit in accordance with an instruction from the communication method selection unit 215.

The base unit communication means 213 responds to a communication request from the communication method selection means 215 to the base unit (a call request or an incoming call to another handset, a subscriber use registration request) and a call carrier. Other assignment request commands are:
Output to the transmission data generation circuit 25.

The master unit communication means 213 receives a command from the master unit as an input and analyzes the command from among the outputs from the reception data generation circuit 25, and in the case of a call carrier and slot assignment request, the slot And the carrier also sends a burst signal for synchronization to the master unit. In the case of a synchronous burst signal from the master unit, a command for calling another slave unit is similarly sent to the master unit. Further, in the case of an incoming call, a command for notifying that an incoming call is being received is similarly sent. In the case of the subscriber use registration, the command is analyzed, and the master unit ID information is stored in the slave unit ID information storage unit 218 or the direct call ID storage unit 219 between the slave units, and is recorded in the slave unit ID storage unit 218. The slave unit ID information is notified to the master unit by a command.

When the transmission method selecting means 215 instructs the direct communication between the slave units, the communication unit 214 between the slave units transmits the command for direct calling between the slave units to the direct communication between the slave units.
It is generated by taking out the base unit ID information from the D storage means 219 and adding it, and directly calls the called remote unit via the transmission data generation circuit 25. In addition, of the outputs from the reception data generation circuit 26, a response from the child device called as only the command of the direct telephone call between the child devices is recognized. Further, in the case of a command for calling a direct call between slave units from another slave unit, the command is compared with the base unit ID information stored in the direct call ID storage unit between slave units 219, and if they match, the call has been received. Is notified to the user by a display means (not shown), and when the user responds by a call request button (not shown), an input of a response is obtained through the communication method selecting means 215, and Send the response command.

The communication method selection means 215 is operated by a communication partner switching button 216 to provide a plurality of master units or child units capable of direct communication between slave units stored in the slave unit ID storage unit 218 and the slave unit direct call ID storage unit 219. One of the devices is selected as a communication partner, and the communication partner is notified to the control data receiving unit 212, the master unit communication unit 213, and the direct communication unit between child units 214.

The timing generation means 217 generates a timing signal necessary for transmission or reception to another circuit based on the timing of the control data reception means 212, and supplies it to each circuit.

The child device ID storage means 218 stores a plurality of pieces of parent device ID information of the parent devices that can be notified of extension during the subscriber use registration, and notifies the control data receiving means 212 of the information.

[0046] The direct unit ID communication unit 219 stores the master unit ID information for performing the direct unit communication and the carrier number for performing the direct unit communication notified at the time of subscriber use registration. Then, the information is notified to the inter-child-unit communication means 214.

FIG. 3 shows the parent device ID storage means 112 of the parent device 1.
FIG. 3 is a diagram showing a configuration of information stored in a. The parent ID storage unit 112 stores, for each extension number of the child device, the child device ID information registered for subscriber use and the child device use information. The slave unit usage information is information indicating whether the slave unit registered for use by the subscriber is a slave unit capable of only direct communication between the slave units or a slave unit capable of also making an extension call, and whether the subscriber use registration has been performed. Includes information on whether you are unregistered. These pieces of information are prepared for the number n of extension numbers managed by the base unit, are stored at the time of subscriber use registration, and are used when calling the base unit from the base unit or calling from the base unit.

FIG. 4 shows the slave unit ID storage means 218 of the slave unit 2.
FIG. 3 is a diagram for explaining a configuration of information stored in the storage device. Handset ID
The storage unit 218 stores, for each parent device that has performed subscriber use registration,
The base unit ID information registered for use by the subscriber is stored. These pieces of information are prepared by the number m of the parent device numbers managed by the child device, are stored at the time of subscriber use registration, are referred to by the communication partner switching button 216 and the communication method selection means 215 of the child device, and Only the master unit in which the ID information is stored is selected as the communication partner, and only the control data from the master unit including the master unit ID information is received.

FIG. 5 is a view for explaining the configuration of information stored in the direct call ID storage means 219 between the child devices of the child device 2. The direct-call ID storage unit 219 stores the ID information for the direct-call between the sub-units and the carrier number for the direct-call between the sub-units at the time of the subscriber registration. These information are stored. When the parent device ID information is stored and referred to by the communication partner switching button 216 and the communication method selection means 215 of the child device, it is selected as a communication partner and stored at a frequency corresponding to the stored carrier number. Receiving a call signal for direct telephone communication between child devices including the parent device ID information.

FIG. 6 is a flowchart for explaining the operation of master unit 1 and slave unit 2 at the time of subscriber use registration of the above-mentioned digital cordless telephone. The operation of the base unit 1 will be described in step "SC", and the operation of the child unit will be described in step "SP".

In step SC1, the base unit 1 inputs a slave extension number of a slave unit for which subscriber registration is to be performed. In step SP1, a communication partner for selecting an area for storing ID information and the like of a parent device for performing subscriber use registration in the child device 2 is selected. In step SC2, base unit 1 outputs control data for subscriber use registration. In step SP2, the slave unit 2 receives the control data transmitted from the master unit 1 and recognizes the master unit that has performed subscriber use registration. The child device 2 transmits to the parent device 1 a subscriber use registration request command for requesting the subscriber device to register for subscriber use in step SP3. The master unit 1 receives this command in step SC3, and secures a communication path between the master unit 1 and the slave unit 2 in step SC4 on the master unit side and step SP4 on the slave unit side.

When the communication path is secured, the main unit 1 proceeds to step S
At C5, it is determined whether the extension number entered in step SC1 described above is a slave unit only for direct communication between slave units or a slave unit capable of both extension calls and direct communication between slave units. If the extension number allows only direct communication between slave units, information A1 is transmitted in step SC6, and otherwise, information A2 is transmitted in step SC7. Information A1 is information including master unit ID information for direct communication between slave units and carrier number for direct communication between slave units, and information A2 is master unit I for direct communication between slave units / extension call.
This is information including D information and a carrier number for direct communication between slave units.

In the slave unit 2, these information are stored in step SP5.
, And in step SP6, the slave unit ID information is transmitted to the master unit. In the parent device 1, in step SC8, the child device I
D information is received. Master device 1 transmits the slave device ID information received in step SC8 and information as to whether the slave device that has performed the subscriber use registration is a slave device that can only perform a direct call between slave devices or a slave device that can also perform an extension call. Base unit ID storage means 11
Stored in 2. In the child device 2, in step SP7, the information A1 or information A2 received in the above-mentioned step SP5 is stored in the child device ID storage means 218 and the direct telephone call I between the child devices.
D storage means 219.

When the storage operation of each of the master unit 1 and the slave unit 2 is completed, the communication path is opened in step SC10 and step SP8, and the operation ends.

FIG. 7 is a flowchart for explaining the incoming call operation of the slave unit 2 of the digital cordless telephone described above. In step S1, a call partner switching button 216
Detects if is pressed. Call partner switch button 2
When 16 is pressed, the process proceeds to step S2, where it is determined whether or not the master unit ID information corresponding to the switched party is stored in the slave unit ID storage means 218. The input of the switch button 216 is invalidated, and the process returns to step S1 again.

If it is determined in step S1 that the call partner switch button 216 has not been pressed, or if the parent device ID information has been stored in step S2, the process proceeds to step S3, in which the call partner selected by the call partner switch button 216 has been selected. Is a direct call between the slave units. In the case of a direct telephone call between slave units, the process proceeds to step S4, and in the case of communication with the master unit 1, the process proceeds to step S10.

Steps S4 to S9 show an operation relating to the detection of an incoming call at the time of direct telephone communication between slave units. In step S4, reception is performed by the i-th carrier among the carrier numbers for direct communication between handset units stored in the direct call ID between handset storage means 219 and stored in the direct call ID between handset storage means 219. It is determined whether or not there is received data including the parent device ID information. If the received data exists, the process proceeds to step S5; otherwise, the process proceeds to step S6.

If it is determined in step S4 that there is received data, the flow advances to step S5 to determine whether the information is incoming information for the own device. If the received information is information for the own device, the process proceeds to step S8. Step S
Proceed to 6. In step S6, direct call I
It is determined whether or not reception has been performed on all carriers of the carrier numbers for direct communication between slave units stored in the D storage unit 219, and if there is a carrier that has not been received, the process returns to step S4 and returns to step S4. Perform reception. If reception has been completed for all the stored carriers, step S
Go to 7. In step S7, the reception is terminated, the standby state is set for a certain time, and the power consumption is minimized.
Reduce battery consumption. If the predetermined time has elapsed in step S7, the process returns to step S1, and the same operation is repeated.

In step S8, the incoming call information of the direct call between the slave units is received, the incoming signal is sounded by the slave unit, and the user responds to the call, so that the direct communication between the calling side slave unit and the slave unit is performed. Make a call. In step S9, it is detected that the direct telephone call between the child devices or the direct telephone call between the child devices is finished. If the call is ended, the process returns to step S1, and the same operation is repeated.

Steps S10 to S14 show an operation relating to detection of an incoming call during an extension call with the master unit. Step S1
In the case of 0, the master unit control data is received. If the control data including the designated master unit ID information stored in the slave unit ID storage unit 218 has been received, the process proceeds to step S11, and Determine whether incoming information is included. If the incoming call information is not included and if the master unit control data cannot be received in step S10, the process proceeds to step S12. In step S12, the reception ends as in the case of the direct communication between the slave units, and waits for a certain period of time. After the state, the process returns to step S1, and the same operation is repeated.

If it is determined in step S11 that the incoming call information for the own device is included, the incoming call signal is sounded in the slave device, and the user answers the call to make an extension call with the master device. In step S14, it is detected that the extension call or the extension call has been terminated,
When the process is completed, the process returns to step s1 to repeat the same operation.

As described above, according to the present embodiment, the carrier number for direct telephone communication between child units at the time of prior subscriber use registration is the same as that of the child unit storing the same parent unit ID. In addition, carriers assigned for direct communication between slave units are not all but some of them. This allows the called handset to detect only the carrier for direct communication between handset specified at the time of prior subscriber use registration, shorten the reception time, and reduce power consumption during standby. Can be minimized. In addition, since it is possible to register at the time of the subscriber use registration in advance that the handset can only perform direct calls between handset units, it is possible to make an extension call with the first base unit,
In addition, it is possible to make a direct telephone call between slave units with another slave unit having the master unit ID information of the second master unit. further,
At the time of subscriber registration in advance, it is possible to select whether the mobile device is a mobile device that performs only direct communication between mobile devices or a mobile device that can also perform an extension call.

By storing the ID information of a plurality of base units, when making an extension call with a plurality of base units, it is not necessary to perform subscriber use registration each time. It becomes possible to select. In addition, even when selecting a base unit that wants to make a call, there is no need to select a base unit that has not been registered for subscriber use in advance.

[0064]

As described above, according to the present invention, the slave unit stores the type of carrier used for communication between slave units in advance, and performs communication with another slave unit using the stored carrier. Therefore, it is not necessary for the slave unit to search all carriers in order in the call waiting state, it is possible to quickly confirm whether there is a call, and to reduce power consumption in the call waiting state. it can.

Further, according to the present invention, it is possible to realize a slave unit that performs only communication between slave units, and the use range of the cordless telephone is expanded.

Further, according to the present invention, a slave unit capable of communicating with a plurality of master units can be realized.
The range of use of cordless telephones is expanded.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a base unit 1 of a digital cordless telephone according to one embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a slave unit 2 of the digital cordless telephone according to one embodiment of the present invention.

FIG. 3 is a diagram illustrating information stored in a parent device ID storage unit 112 provided in the child device 1.

FIG. 4 is a diagram illustrating information stored in a child device ID storage unit 218 provided in the child device 2.

FIG. 5 is a direct call ID storage means 2 between slave units provided in the slave unit 2.
FIG. 19 is a diagram for describing storage information of No. 19;

FIG. 6 is a flowchart for explaining operations of the parent device 1 and the child device 2 at the time of subscriber use registration.

FIG. 7 is a flowchart illustrating an incoming call operation of the slave unit 2.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 master unit 2 slave unit 11, 21 antenna 12, 22 transmission / reception switching circuit 13, 23 transmission circuit 14, 24 reception circuit 15, 25 transmission data generation circuit 16, 26 reception data generation circuit 17 extension communication means 18 slave communication means 19 Control data transmitting means 27 Voice encoding circuit 28 A / D converting circuit 29 D / A converting circuit 110, 217 Timing generating means 111 Base unit communication unit 112 Base unit ID storage unit 113 Subscriber use registration selecting unit 210 Microphone 211 Speaker 212 Control data receiving means 213 Base unit communication means 214 Inter-unit communication unit 215 Communication method selection unit 216 Call request button 218 Sub-unit ID storage unit 219 Inter-unit direct call ID storage unit

Claims (3)

(57) [Claims] The present invention comprises a master unit and a plurality of slave units. The master unit transmits slave unit communication means for communicating with each slave unit and identification information for identifying each slave unit used in communication with the slave unit. Storage means for storing, for each of the slave units registered in the own unit, storage units for storing the functions of the slave unit, wherein the slave unit includes: a master unit communication unit for communicating with the master unit; And communication means for communicating with another slave unit using the selected carrier, and identification information for identifying the master unit used for communication with the master unit. A digital cordless telephone, comprising: a storage unit, wherein the slave unit previously stores a type of carrier used for communication between the slave units. 2. A base unit comprising: a base unit and a plurality of sub units. The base unit transmits sub unit communication means for communicating with each sub unit, and identification information for identifying each sub unit used at the time of communication with the sub unit. Storage means for storing, for each of the slave units registered in the own unit, storage units for storing the functions of the slave unit, wherein the slave unit includes: a master unit communication unit for communicating with the master unit; And communication means for communicating with another slave unit using the selected carrier, and identification information for identifying the master unit used for communication with the master unit. A digital cordless telephone including a storage unit, wherein the master unit stores information indicating that a slave unit registered in the master unit is a slave unit that performs only a call between slave units, and the slave unit is a slave unit. Storage means for storing identification information for identifying a slave unit used during communication between Digital cordless phone that butterflies. 3. A base unit comprising: a base unit and a plurality of sub units. The base unit communicates with the sub unit communication means for communicating with each sub unit and identification information for identifying each sub unit used for communication with the sub unit. Storage means for storing, for each of the slave units registered in the own unit, storage units for storing the functions of the slave unit, wherein the slave unit includes: a master unit communication unit for communicating with the master unit; And communication means for communicating with another slave unit using the selected carrier, and identification information for identifying the master unit used for communication with the master unit. A digital cordless telephone including a storage unit, wherein the slave unit stores a plurality of types of identification information used for communication with the base unit, and includes a selection unit for selecting one of the stored plurality of identification information. Digital cordless telephone characterized by the following.