JP7021557B2 - Master unit of telephone system, telephone control device and cordless telephone device - Google Patents

Description

The present invention relates to, for example, a telephone system configured by using a cordless telephone device, and a device used in the telephone system.

In recent years, a business phone system (button telephone system) configured by connecting a cordless telephone device to a telephone control device such as a main device or a SIP server has been provided. In a cordless telephone device, a master unit and a slave unit are wirelessly connected to each other and function as one telephone device. A communication method of the DECT (Digital Enhanced Cordless Telecommunication) standard is often used between a master unit and a slave unit constituting a cordless telephone device.

In the DECT standard, the downlink communication method from the master unit to the slave unit is a time division duplex system that uses a time division multiple access method, and the uplink communication method from the slave unit to the master unit is time division. It is stipulated that it is a multiple connection method. Further, in the DECT standard, it is stipulated that the frequency band used should be "1.9 GHz band" and that the number of channels should be a maximum of 5 channels.

Further, in the DECT standard, one frame in one channel of the coded data is 10 milliseconds (ms), and as shown in FIG. 11, it is divided into 24 time slots. In the following, the time slot is simply referred to as a slot. The 12 slots S0 to S11 in the first half frame period of one frame are used for downlink from the master unit to the slave unit, and the 12 slots S12 to S23 in the latter half frame period are the slave units. Used for uplink from to the master unit.

In the DECT standard cordless telephone device used in the business phone system, if the power is not off, one cordless telephone device in the standby state (idle state) uses one of the 12 slots to be the master unit. Is transmitting various control information including a synchronization signal from the handset to the handset. The slot at this time is called a dummy bearer. Normally, a plurality of slave units can be connected to the master unit, but even when only one slave unit is connected to the master unit, a plurality of slave units can also be connected. Even when the slave unit is connected, control information and the like are transmitted to each slave unit using one slot (dummy bearer) in the standby state. In this case, the information is not transmitted from the slave unit to the master unit.

From such a standby state, for example, when there is an incoming call and the host unit is notified of the incoming call from the host device, the master unit uses a dummy bearer to notify each slave unit of the data session connection request, and the child The machine searches for an empty slot, works on the master machine, and tries to acquire the slot used for communication. The data session connection request is a request for preparing an environment in which the master unit and the slave unit can communicate with each other, and an incoming call notification is not made. Then, when a slot for mutual communication between the master unit and the slave unit can be acquired in response to the data session connection request, the master unit releases the dummy bearer and receives an incoming call using the acquired downlink slot. Notify. At the same time, the master unit also identifies the uplink slot so that information can be received from the slave unit.

The slot acquired for mutual communication between the master unit and the slave unit in this way is called a traffic bearer. Then, various control information including a synchronization signal is transmitted through the traffic bearer, and voice information is also transmitted after the communication line is connected to the communication destination. Since the traffic bearer also transmits various control information, the process of identifying (acquiring) the traffic bearer and releasing the dummy bearer is said to merge the dummy bearer into the traffic bearer.

However, as described with reference to FIG. 11, in the case of a DECT standard cordless telephone device, both the uplink and the downlink have 12 slots, so if the number of slave units connected to one master unit exceeds 12, Exceeds the number of available slots. In this case, for example, if an attempt is made to notify all the slave units of an incoming call, it is necessary to cut and paste the data communication, which causes a time loss.

Here, cutting and pasting data communication means assigning 12 slots to 12 slave units and notifying them of an incoming call, and then transferring some of the slots of the 12 slots to other slave units other than the 12 slave units. Reassigning and notifying the other handset of the incoming call. In this case, since the incoming call cannot be notified to all 12 or more slave units at once, a time loss occurs in the incoming call notification.

Therefore, for example, when there are a plurality of master units (base stations or access points) with which the slave unit (terminal) can communicate, as in the invention disclosed in Patent Document 1 and Patent Document 2 described later, each parent It is conceivable to control the number of slave units accommodated by the aircraft to be even. In other words, by leveling the number of slave units accommodated by each master unit so that there is as little deviation as possible, the master unit and the slave unit can always communicate well, and a time loss occurs in communication. It is conceivable to avoid it.

Japanese Unexamined Patent Publication No. 10-41969 Japanese Unexamined Patent Publication No. 2015-106899

However, in the case of the invention disclosed in Patent Document 1 and Patent Document 2 described above, if the plurality of slave units are not in a positional relationship capable of satisfactorily communicating with the plurality of master units, they are connected to each master unit. It is not possible to control the number of slave units to be used evenly. Therefore, if there are many slave units that can communicate with only one master unit, the number of slave units connected to the master unit cannot be equalized, and communication time loss is eliminated. Can not.

In view of the above, the present invention is the present invention, in a telephone system accommodating a cordless telephone device, communication occurs when a larger number of slave units than are capable of simultaneous communication are connected to a master unit of the cordless telephone device. The purpose is to be able to reduce the time loss of.

In order to solve the above problems, the telephone control device of the invention according to claim 1 is
The telephone control device of a telephone system configured by connecting one or more master units of a cordless telephone device capable of connecting a plurality of slave units to a telephone control device connected to a wide area network.
When the master unit has information to be transmitted to all the connected slave units, the master unit has a distribution mode which is a mode for transmitting the information to all the slave units.
Formed based on slave unit management information including information indicating a slave unit connected to the master unit provided by one or more master units and a slave unit that is not connected to the master unit but can be connected to the master unit. A storage means for storing slave unit management information for each master unit, which manages slave units that are connected to each master unit and slave units that are not connected to each master unit but can be connected .
When there is information to be transmitted to all the slave units connected to the master unit, the number of connected slave units is a predetermined number or less based on the slave unit management information for each master unit of the storage means. For the master unit, the distribution mode is turned on, and for the master unit to which the number of connected slave units is larger than the predetermined number, the distribution mode is turned off. Control means controlled by supplying a signal,
Based on the master unit-specific slave unit management information of the storage means, some of the slave units connected to one master unit in excess of the predetermined number can be disconnected and connected. With a leveling control means for supplying and controlling a control signal to the one master unit and the other master unit so as to be connected to the master unit of
Equipped with
The control means is characterized in that the on / off of the distribution mode is controlled according to the connection state of the slave unit after the control by the leveling control means.

According to the present invention, in a telephone system accommodating a cordless telephone device, a child connected to a master unit can turn on / off a distribution mode for transmitting information to all slave units connected to the master unit. It can be controlled according to the number of machines. As a result, it is possible to reduce the communication time loss that occurs when a larger number of slave units than are capable of simultaneous communication are connected to the master unit of the cordless telephone device.

It is a block diagram for demonstrating the whole outline of embodiment of the telephone system by this invention. It is a block diagram which shows the detailed configuration example of the main apparatus which constitutes a part of embodiment of the telephone system by this invention. It is a block diagram which shows the detailed configuration example of the master unit which constitutes a part of embodiment of the telephone system by this invention. It is a block diagram which shows the detailed configuration example of the handset which constitutes a part of embodiment of the telephone system by this invention. It is a figure for demonstrating the arrangement example of a master unit and a slave unit. It is a figure for demonstrating the example of the slave unit management table formed in the master unit of embodiment. It is a figure for demonstrating the example of the slave unit management table formed in the master unit of embodiment. It is a figure for demonstrating the example of the slave unit management table for each master unit formed in the main apparatus of embodiment. It is a flowchart for demonstrating the example of the processing of the main apparatus of embodiment. It is a flowchart for demonstrating the example of the processing of the master unit of embodiment. It is a figure for demonstrating the slot of the DECT standard.

Hereinafter, an embodiment of the apparatus and system of the present invention will be described with reference to the drawings. In the embodiment described below, a case where the present invention is applied to a telephone system called a business phone system provided in a premises of a company or the like will be described as an example.

[Telephone system configuration example]
FIG. 1 is a block diagram showing an overall configuration example of the telephone system 10 of the embodiment. The telephone system 10 is configured by applying an embodiment of the telephone system according to the present invention. In the telephone system 10 of this example, a plurality of cordless telephone devices 21, 22, ..., 2n are connected as extension telephone devices to the main device 1 as an example of the telephone control device. The character n as a subscript basically means an integer of 1 or more. However, since the cordless telephone devices 21 and 22 already exist in FIG. 1, the character n in FIG. 1 means an integer of 3 or more. Hereinafter, in this specification, the character n as a subscript is used with the same meaning.

Each of the cordless telephone devices 21 and 22 to 2n consists of a base set BS1 and BS2 to BSn as a master unit and a handset HS1 and HS2 to HSn as a slave unit, respectively, and the master unit BS1 and BS2 to BSn. And each of the slave units HS1, HS2 to HSn are wirelessly connected. Although not shown, the extension telephone device connected to the main device 1 can be connected not only to the cordless telephone devices 21 and 22 to 2n but also to a digital button telephone terminal in the same manner as a normal business phone. Is.

Note that FIG. 1 shows a case where one slave unit is connected to one master unit, but a plurality of slave units are connected to each of the master units BS1 to BSn. It is designed to be able to connect wirelessly. Therefore, even if the user of the slave units HS1 to HSn makes a call through the slave units HS1 to HSn and moves, the call is made while performing a handover as long as the communication with any of the master units BS1 to BSn is possible. Can be maintained. Handover means that the master unit that communicates with the slave units HS1 to HSn is switched as the slave units HS1 to HSn move.

In this embodiment, the wireless connection between each of the master units BS1 to BSn of the cordless telephone devices 21 to 2n and each of the slave units HS1 to HSn uses the above-mentioned DECT standard (method) of the digital cordless telephone. It is performed by the TDMA / TDD method used. The main device 1 can accommodate one or more telephone lines L1 to Lm (m is an integer of 1 or more). Then, the master units BS1 to BSn of the cordless telephone devices 21 to 2n are connected to the main device 1. In the example of FIG. 1, the master units BS1 to BSn and the main unit 1 are connected by wire, but may be wireless.

The main device 1 performs call control and circuit switching control for a plurality of cordless telephone devices 21 to 2n, and controls as other business phones, and supplies a reference synchronization signal SYNC to each of the plurality of cordless telephone devices 21 to 2n. It has a function. The reference synchronization signal SYNC is a signal having a period of 130 milliseconds (ms) in this example.

Further, the main device 1 includes a control circuit 12 and a slave unit management table 14 for each master unit. The slave unit management table 14 for each master unit is connected to (accommodated) or not connected to each of the master units BS1 to BSn based on the information from each of the master units BS1 to BSn. It manages slave units that can be connected to things (slave units that can wirelessly communicate with the master unit). The control circuit 12 performs a process of controlling each part of the main device 1 and forming and providing a control signal for the master units BS1 to BSn connected to the own unit. Further, the control circuit 12 controls on / off of the distribution mode for each of the master units BS1 to BSn based on the stored data of the master unit-specific slave unit management table 14, and the master unit BS1 to BSn. Controls to level the number of connected handsets in.

The distribution mode is a mode in which, for example, when there is information to be transmitted to all the slave units connected to the master unit such as an incoming call notification, the information is transmitted to all the slave units. be. In the case of a cordless telephone device of the DECT standard, as described with reference to FIG. 11, one frame consisting of 12 slots for each of the uplink and the downlink is used as a communication processing unit. Therefore, in theory, 12 slave units can be connected to the master units BS1 to BSn at the same time and information can be transmitted at the same time.

However, when more than 12 slave units are connected to the master units BS1 to BSn, the slots are reassigned to the slave units and the data communication for transmitting information is cut and pasted multiple times. Need arises. Therefore, the control circuit 12 of the main device 1 turns on the distribution mode for the master unit to which the number of connected slave units is 12 or less, and transmits information to each slave unit all at once. Further, the control circuit 12 of the main device 1 is a slave unit defined as a slave unit that preferentially transmits information by turning off the distribution mode for the master unit having more than 12 slave units connected. Send information only to.

In addition, the leveling of the number of slave units connected to the master unit is to connect to other master units in those slave units when there are master units to which more than 12 slave units are connected. If possible, the corresponding slave unit is disconnected from the current connection destination master unit and connected to another master unit. By performing this leveling, it is possible to reduce the state in which the distribution mode is turned off. In this way, the control circuit 12 of the main device 1 performs off / off control of the distribution mode and leveling control of the number of connected slave units based on the information in the slave unit management table 14 for each master unit. Can be done.

Each of the master units BS1 to BSn of the cordless telephone devices 21 to 2n synchronizes with the reference synchronization signal SYNC from the main device 1 and is one frame (10 milliseconds (ms)) which is a unit communication period of the DECT standard digital cordless telephone. )) Generates a frame synchronization signal as a synchronization signal with a period of period. Then, based on the generated frame synchronization signal, TDMA / TDD system wireless communication using the DECT standard is executed between the slave units HS1 to HSn.

Each of the master units BS1 to BSn generates a frame synchronization signal based on the reference synchronization signal SYNC. Then, based on the generated frame synchronization signal, the slave units HS1 to HSn are controlled to perform wireless communication with each other by using the downlink and uplink slots for one frame period. Further, each of the master units BS1 to BSn is provided with a slave unit management table 411, and can manage each of the slave units connected to the own unit, and can be connected even though it is not connected to the own unit. It is also possible to manage the handset.

Then, each of the master unit BS1 to BSn can notify the main unit 1 of the information managed in the slave unit management table 411. Further, each of the master units BS1 to BSn switches the distribution mode on / off in its own unit based on the control signal from the main unit 1, opens the connected slave unit, and also has a child. It is possible to connect (accommodate) the machine.

[Configuration example of main device 1]
FIG. 2 is a block diagram showing a configuration example of the main device 1. As shown in FIG. 2, the main device 1 includes a line interface 11 to which telephone lines L1 to Lm are connected, a control circuit 12 for mounting a computer and controlling the entire main device 1, and a line LSI ( Large Scale Integrated Circuit) unit 13, a slave unit management table 14 for each master unit, and a reference oscillator 15 are provided.

The line interface 11 is controlled by the control circuit 12 to supply audio signals (received audio signals) from the lines L1 to Ln to the line LSI unit 13, and control signals such as call control signals from the line are control circuits. Supply to 12. Further, the line interface 11 is controlled by the control circuit 12, and the audio signal (transmitted audio signal) from the line LSI unit 13 is transmitted to the other party through the lines L1 to Lm, and the call control signal from the control circuit 12 and the like are transmitted. The control signal of is also transmitted to the other party through the lines L1 to Lm.

The line LSI unit 13 includes n extension processing circuits 131, 132, ..., 13n and a timing signal generation unit 130 corresponding to n extension telephone devices. The timing signal generation unit 130 generates a transmission clock signal CK and a multiplexing / division timing signal TM from a reference clock signal from a high-precision reference oscillator 15 using a crystal oscillator, and processes n extensions. It is supplied to the circuits 131 to 13n. The n extension processing circuits 131 to 13n have exactly the same configuration, and are the audio signal processing unit 31, the control signal processing unit 32, the synchronization signal processing unit 33, and the multiplexing / division processing unit, respectively. It consists of 34.

The audio signal processing unit 31 is connected to the line interface 11 and also to the multiplexing / dividing processing unit 34, and the received audio signal from the line interface 11 and the transmission from the multiplexing / dividing processing unit 34. It is a processing circuit for spoken audio signals. A transmission clock signal CK from the timing signal generation unit 130 is supplied to the audio signal processing unit 31.

The control signal processing unit 32 is connected to the control signal input / output terminal of the control circuit 12 and is also connected to the multiplexing / dividing processing unit 34. It is a processing circuit of a control signal such as a control signal (both a control signal from the main device 1 to the cordless telephone device and a control signal from the cordless telephone device to the main device 1). The transmission clock signal CK from the timing signal generation unit 130 is also supplied to the control signal processing unit 32.

The synchronization signal processing unit 33 is connected to the synchronization signal output end of the control circuit 12 and is also connected to the multiplexing / division processing unit 34, and is a reference synchronization signal having a predetermined synchronization signal pattern from the control circuit 12. This is a SYNC processing circuit. Similarly, the transmission clock signal CK from the timing signal generation unit 130 is also supplied to the synchronization signal processing unit 33.

The multiplexing / dividing processing unit 34 is connected to the audio signal processing unit 31, the control signal processing unit 32, and the synchronization signal processing unit 33, and is also connected to each of the master units BS1 to BSn of the cordless telephone devices 21 to 2n. To. Then, the multiplexing / dividing processing unit 34 has a voice signal from the voice signal processing unit 31, a control signal from the control signal processing unit 32, and a synchronization signal based on the timing signal TM from the timing signal generation unit 130. The reference synchronization signal SYNC from the processing unit 33 is multiplexed (time-divided multiplexing) to generate a multiplexed signal, and the generated multiplexed signal is supplied to each of the master units BS1 to BSn. Further, the multiplexing / dividing processing unit 34 divides the multiplexed signal from each of the master units BS1 to BSn into an audio signal and a control signal based on the timing signal TM from the timing signal generation unit 130. The audio signal is supplied to the audio signal processing unit 31, and the control signal is supplied to the control signal processing unit 32.

The slave unit management table 14 for each master unit is formed by the control circuit 12 based on the information from each of the master units BS1 to BSn. Then, as described above, the slave unit management table 14 for each master unit is capable of actually wireless communication (connection is possible) although the slave units are connected to each of the master units BS1 to BSn and are not connected. N) It holds information that manages the handset. The control circuit 12 performs call control, circuit-switched control, and the like, and also performs processing such as creating a slave unit management table for each master unit based on information from the master unit BS1 to BSn. Further, the control circuit 12 controls the on / off of the distribution mode for each of the master units BS1 to BSn based on the stored data of the slave unit management table 14 for each master unit, or in the master units BS1 to BSn. Controls to level the number of connected handsets.

Although not shown, an address management unit is also connected to the main device 1. The address management unit stores and manages the correspondence between the extension numbers of the cordless telephone devices 21 to 2n connected to the main device 1 and the extension processing circuits 131 to 13n. In the telephone system 10 of this embodiment, when any one of the cordless telephone devices 21 to 2n is connected to the main device 1, the master unit of the cordless telephone device sends a connection request to the main device 1.

The main device 1 is connected to the cordless telephone device by detecting which of the extension processing circuits 131 to 13n is the extension processing circuit that receives the connection request from the master unit of the cordless telephone device as a control signal. Detects the extension processing circuit. Then, the control circuit 12 associates the extension number set by the installation contractor, the administrator, or the like with the extension number automatically set with the identification information of the extension processing circuit to which the cordless telephone device is connected. Register with the address management department.

Based on the information of this address management unit, it is possible to appropriately grasp the operating status of the cordless telephone device connected to the main device 1, and appropriately control each of the cordless telephone devices connected to the main device 1. can.

[Configuration example of cordless telephone device 21 to 2n]
Each of the master units BS1 to BSn and the slave units HS1 to HSn of the plurality of cordless telephone devices 21 to 2n all have the same configuration. Therefore, in the following description, a configuration example of the master unit and the slave unit will be described by taking the case of the master unit BS1 and the slave unit HS1 of the cordless telephone device 21 as an example.

<Configuration example of master unit>
FIG. 3 is a block diagram showing a configuration example of the master unit BS1. As shown in FIG. 3, the master unit BS1 includes a control circuit 41 for controlling the entire master unit BS1, a line LSI unit 42, a synchronization signal generation circuit 43, a wireless communication circuit 44, an oscillator 45, and an oscillator 45. It is configured to include 46.

The control circuit 41 is configured by mounting a computer. The control circuit 41 also has a function of performing control such as call control in the master unit BS1. Further, the control circuit 41 includes a slave unit management table 411, and manages a slave unit connected to the own unit and a slave unit that is not connected to the own unit but can be connected to the own unit. Then, the control circuit 41 realizes a function of providing the information stored in the slave unit management table 411 to the main device 1 through the line LSI unit 42 described later.

Further, the control circuit 41 performs on / off switching control of the distribution mode, which is the processing mode of the own unit, based on the control signal provided from the main device 1, and equalizes the connected slave units. To control for. Controls for leveling include control to disconnect the specified slave unit and control to connect (accommodate) the specified slave unit to the own unit among the already connected slave units. There is. As described above, the control circuit 41 performs control for realizing the function as a cordless telephone device such as call control, and control for mode switching and leveling.

The line LSI unit 42 is a circuit for exchanging audio signals, control signals, and synchronization signals with the main device 1, and is a division / multiplexing processing unit 421, a control signal processing unit 422, and an audio signal. It includes a processing unit 423, a synchronization signal detection unit 424, and a PLL (Phase locked Loop) unit 425. An oscillation signal having a reference frequency from the oscillator 45 is supplied to the PLL unit 425, and a multiplexed signal from the main device 1 is supplied to the PLL unit 425. In this example, the frequency of the oscillation signal of the oscillator 45 is, for example, 2048 MHz (0.488 nanoseconds (ns)).

The PLL unit 425 extracts the component of the clock signal CK from the timing signal generation unit of the main device 1 from the multiplexed signal from the main device 1 by so-called self-clocking, and the extracted clock signal CK component and the oscillator 45. Phase comparison is performed with the oscillation signal from, and based on the comparison result, the system clock signal SCK of the master unit BS1 synchronized with the clock signal CK component is generated from the oscillation signal of the oscillator 45.

Then, the PLL unit 425 divides the generated system clock signal SCK into a division / multiplexing processing unit 421, a control signal processing unit 422, an audio signal processing unit 423, and a synchronization signal detection unit 424 as signal processing clock signals. At the same time, it is supplied to the synchronization signal generation circuit 43.

The division / multiplexing processing unit 421 is connected to the main device 1 and is also connected to the control signal processing unit 422, the audio signal processing unit 423, and the synchronization signal detection unit 424. Then, the division / multiplexing processing unit 421 divides the control signal, the voice signal, and the reference synchronization signal SYNC from the multiplexing signal from the main device 1, the control signal is sent to the control signal processing unit 422, and the voice signal is the voice. The reference synchronization signal SYNC is supplied to the signal processing unit 423 and the reference synchronization signal SYNC is supplied to the synchronization signal detection unit 424, respectively.

Further, the division / multiplexing processing unit 421 multiplexes the control signal from the control signal processing unit 422 and the voice signal from the voice signal processing unit 423 to generate a multiplexing signal, and the generated multiplexing signal. Is supplied to the main device 1. The control signal processing unit 422 is connected to the control signal input / output terminal of the control circuit 41 and is also connected to the division / multiplexing processing unit 421. It is a processing circuit of a control signal such as a control signal (both a control signal from the main device 1 to the cordless telephone device 21 and a control signal from the cordless telephone device 21 to the main device 1).

The voice signal processing unit 423 is connected to the wireless communication circuit 44 and also to the division / multiplexing processing unit 421, and is connected to the transmitted voice signal received from the slave unit HS1 from the wireless communication circuit 44 and the division. / It is a processing circuit of the received voice signal from the multiplexing processing unit 421. The synchronization signal detection unit 424 receives the reference synchronization signal SYNC from the division / multiplexing processing unit 421 and detects a predetermined synchronization signal pattern included in the reference synchronization signal SYNC, so that the synchronization signal detection unit 424 can be used as a signal at the time of detection. A reference synchronization pulse PS having the same period (130 ms) as the reference synchronization signal SYNC, which is synchronized with the reference synchronization signal SYNC, is generated. Then, the synchronization signal detection unit 424 supplies the generated reference synchronization pulse PS to the synchronization signal generation circuit 43.

The synchronization signal generation circuit 43 includes a counter 431 and a synchronization signal generation unit 432. A reference synchronization pulse PS having a period of 130 ms is supplied to the preset terminal PER from the synchronization signal detection unit 424 of the line LSI unit 42, and the system clock signal SCK from the PLL unit 425 is supplied to the counter 431 as a count input. To. Then, the output count value CNT of the counter 431 is supplied to the synchronization signal generation unit 432. The synchronization signal generation unit 432 generates a synchronization signal FL having a frame period (10 ms) of the DECT standard from the output count value CNT of the counter 431. The synchronization signal generation circuit 43 supplies the frame synchronization signal FL generated by the synchronization signal generation unit 432 to the wireless communication circuit 44.

Next, the wireless communication circuit 44 will be described. In this embodiment, the wireless communication circuit 44 uses a general-purpose wireless communication LSI for a master unit for performing DECT standard wireless communication. The wireless communication circuit 44 includes a control unit 441, a TDMA modulation / demodulation unit 442, and a wireless communication unit 443. The wireless communication unit 443 is a circuit unit for performing wireless communication with the slave unit HS1.

The control unit 441 is connected to the TDMA modulation / demodulation unit 442 and the wireless communication unit 443, and is also connected to the control circuit 41. The control unit 441 controls the entire operation of the wireless communication circuit 44, and supplies a control signal based on the control signal obtained from the control circuit 41 to the TDMA modulation / demodulation unit 442.

The TDMA modulation / demodulation unit 442 is connected to the audio signal processing unit 423 of the control unit 441 and the line LSI unit 42, and is also connected to the wireless communication unit 443, from the control signal from the control unit 441 and the audio signal processing unit 423. Modulation is performed to transmit the audio signal of. The signal modulated by the TDMA modulation / demodulation unit 442 is transmitted to the slave unit HS1 through the wireless communication unit 443.

Further, the TDMA modulation / demodulation unit 442 demodulates an audio signal and a control signal from the received signal from the slave unit HS1 received by the wireless communication unit 443, and supplies the demodulated audio signal to the audio signal processing unit 423 for demodulation. The control signal is supplied to the control unit 441.

The TDMA modulation / demodulation unit 442 includes a PLL unit 4421 for clock generation. The oscillation signal from the oscillator 46 is supplied to the PLL unit 4421, and the frame synchronization signal FL from the synchronization signal generation circuit 43 is supplied to the PLL unit 4421.

The PLL unit 4421 compares the phase of the frame synchronization signal FL from the synchronization signal generation circuit 43 and the oscillation signal from the oscillator 46, and synchronizes the oscillation signal of the oscillator 46 with the frame synchronization signal FL based on the comparison result. Generates a timing signal and a clock signal.

The TDMA modulation / demodulation unit 442 uses the timing signal and the clock signal synchronized with the frame synchronization signal FL to generate a transmission signal to the slave unit HS1 for a period corresponding to a slot in the downlink that can be allocated and used, and up. The slot at the link is used to process the received signal from the slave unit HS1.

Normally, the master unit BS1 is connected to the main unit 1 and starts synchronization processing for communication with the slave unit HS1 as described above, and always communicates with the slave unit HS1 through the dummy bearer. Maintaining the possible state. That is, the control unit 441 of the wireless communication circuit 44 of the master unit BS1 transmits the transmission signal generated by the TDMA modulation / demodulation unit 442 to the slave unit HS1 through the wireless communication unit 443 using one slot set in the master unit. When the response is returned from the slave unit HS1, the slot used for transmitting the transmission signal is used for the downlink, and the slot that receives the response from the slave unit HS1 is used for the uplink to establish synchronization. And control to send and receive.

Further, when the incoming call is notified, the master unit BS1 sends this to the slave unit HS1. When the slave unit HS1 receives the incoming call notification, it searches for an empty slot, identifies the slot (traffic bearer) used for communication, notifies the master unit BS1, and uses the acquired slot to be the parent. The machine BS1 and the handset HS1 are connected so that a state in which a call can be made can be formed.

<Configuration example of slave unit>
FIG. 4 is a block diagram showing a configuration example of the slave unit HS1. As shown in FIG. 4, the slave unit HS1 includes a wireless communication circuit 51, a control circuit 52, a codec circuit 53, an oscillator 54, a microphone 55, and a speaker 56. The microphone 55 constitutes a handset, and the speaker 56 constitutes a handset.

The wireless communication circuit 51 uses a general-purpose wireless communication LSI for a slave unit for performing DECT standard wireless communication. The wireless communication circuit 51 includes a control unit 511, a TDMA modulation / demodulation unit 512, and a wireless communication unit 513. The wireless communication unit 513 is a circuit unit for performing wireless communication with the master unit BS1.

The control unit 511 is connected to the TDMA modulation / demodulation unit 512 and the wireless communication unit 513, and is also connected to the control circuit 52. The control unit 511 controls the entire operation of the wireless communication circuit 51, and supplies a control signal based on the control signal obtained from the control circuit 52 to the TDMA modulation / demodulation unit 512.

The TDMA modulation / demodulation unit 512 is connected to the control unit 511 and the wireless communication unit 513, and is also connected to the codec circuit 53, and transmits the control signal from the control unit 511 and the audio signal from the codec circuit 53 to the master unit BS1. Modulate to do. The signal modulated by the TDMA modulation / demodulation unit 512 is transmitted to the master unit BS1 through the wireless communication unit 513. Further, the TDMA modulation / demodulation unit 512 demodulates an audio signal and a control signal from the received signal from the master unit BS1 received by the wireless communication unit 513, supplies the demodulated audio signal to the codec circuit 53, and demodulates the control signal. Supply to the control unit 511.

The TDMA modulation / demodulation unit 512 includes a PLL unit 5121 for clock generation. An oscillation signal from the oscillator 54 is supplied to the PLL unit 5121, and a demodulation signal of the reception signal from the wireless communication unit 513 is supplied. The PLL unit 5121 receives the oscillation signal from the oscillator 54. A clock signal synchronized with the clock component of the signal demodulation signal is generated. The clock signal from the PLL unit 5121 is used as a processing clock signal in the TDMA modulation / demodulation unit 512.

The codec circuit 53 decodes the audio signal demodulated by the TDMA modulation / demodulation unit 512, converts it into an analog audio signal, supplies the analog audio signal to the speaker 56, and emits the sound as the received sound. Further, the codec circuit 53 encodes the analog audio signal picked up by the microphone 55 and supplies it to the TDMA modulation / demodulation unit 512.

The control circuit 52 transmits a call control signal at the time of calling from the slave unit HS1 to the master unit BS1 through the wireless communication circuit 51, and also controls the call at the time of receiving an incoming call from the master unit BS1. When a signal is received, a process such as emitting a ringtone from the speaker 56 is performed.

Further, the control unit 511 of the wireless communication circuit 51 controls the TDMA modulation / demodulation unit 512 according to the control signal from the master unit BS1 corresponding to the own unit, and searches for a slot used for communication between the downlink and the uplink. It is possible to specify and process reception / transmission. That is, at the time of standby, the master unit BS1 and the slave unit HS1 can send and receive control signals through one slot (dummy bearer) predetermined in the downlink and the uplink. Then, for example, when a simultaneous incoming call occurs and the incoming call notification from the main device 1 is notified to the slave unit HS1 via the master unit BS1, the slave unit HS1 performs a search process for an empty slot and is free to use for a call. Get a slot. Then, the slave unit HS1 cooperates with the master unit BS1 so that the acquired empty slot can be used as a traffic bearer to make a call.

In this way, the control unit 511 of the wireless communication circuit 51 identifies a slot used for communication with the master unit BS1 according to the control signal from the master unit BS1 and connects to the master unit BS1. Can be done. Further, the control unit 511 of the wireless communication circuit 51 can also release (release) the connection with the master unit BS1 in response to the control signal from the master unit BS1. Further, the control unit 511 of the wireless communication circuit 51 identifies a slot to be used for communication with the other master unit according to a control signal from the other master unit capable of communicating with the other master unit, and identifies the slot to be used for communication with the other master unit. Can be made to connect to.

The above description is for the master unit BS1 and the slave unit HS1 of the cordless telephone device 21, but as described above, regarding the master units BS2 to BSn and the slave units HS2 to HSn of the other cordless telephone devices 22 to 2n. Has a similar configuration.

[Specific example of control to reduce time loss of data communication to slave unit]
Next, a specific example of control for reducing the time loss of data communication to the slave unit will be described. In the following, for the sake of simplicity, 32 children having the configuration described with reference to FIG. 4 with respect to any one of the four master units BS1 to BS4 having the configuration described with reference to FIG. A case where the machines HS1 to HS32 are connected to form a telephone system will be described as an example.

Further, in the case of a DECT standard cordless telephone device, as described above, since communication is performed in units of one frame having 12 slots for each of the downlink and the uplink, theoretically, 12 units are used at one time. It is possible to connect the slave unit of the above to one master unit and communicate at the same time. However, in the case of the example described below, considering that there are slots that cannot be used due to the influence of noise, for example, a maximum of eight slave units can be used for one master unit. It is assumed that they can be connected at the same time and communicate at the same time.

Therefore, regarding the master units BS1 to BS4, if the number of connected slave units is 8 or less, the distribution mode is turned on, and if there are more than 8 units, the distribution mode is turned off. .. Regarding the master units BS1 to BS4, if the number of connected slave units is 8 or less, the connected slave units are not targeted for disconnection, but if the number is more than 8, the connected slave units are connected. Will be described as a target for disconnection.

FIG. 5 is a diagram for explaining an arrangement example of the master units BS1 to BS4 and the slave units HS1 to HS32 in this example. In FIG. 5, the black circle indicates the installation position of the master unit. FIG. 5 shows a case where the master unit BS1 is installed at the position indicated by the black circle on the upper left side and the master unit BS2 is installed at the position indicated by the black circle on the lower left side. Further, in FIG. 5, the master unit BS3 is installed at the position indicated by the black circle on the lower right side, and the master unit BS4 is installed at the position indicated by the black circle on the upper right side. These master units BS1 to BS4 are connected to the main unit 1 by wire as described with reference to FIG. 1, but the description of the main unit 1 is omitted in FIG.

A circular communicable area AR1 capable of communicating with the master unit BS1 is formed around the master unit BS1, and a circular communicable area capable of communicating with the master unit BS2 is possible around the master unit BS2. Area AR2 is formed. Similarly, a circular communicable area AR3 capable of communicating with the master unit BS3 is formed around the master unit BS3, and a circle capable of communicating with the master unit BS4 is formed around the master unit BS4. The communicable area AR4 is formed.

Then, as shown in FIG. 5, 16 slave units HS1 to HS16 are located in the communicable area AR1 capable of communicating with the master unit BS1, and each of them is connected to the master unit BS1. It is assumed that it has been done. Further, 16 slave units HS5 to HS12 and HS17 to HS24 are located in the communicable area AR2 capable of communicating with the master unit BS2, and 8 slave units HS17 to HS24 among them are located. Is connected to the master unit BS2.

Further, 14 slave units HS11, HS12, HS21 to HS32 are located in the communicable area AR3 capable of communicating with the master unit BS3, and 8 slave units HS25 to HS32 among them are located. Is connected to the master unit BS3. Further, 10 slave units HS9 to HS14 and HS29 to HS32 are located in the communicable area AR4 capable of communicating with the master unit BS4, but any of the slave units is located in the master unit BS4. Is not connected.

As for the relationship between the slave units HS1 to HS32 in each of the master units BS1 to BS4, each control circuit 41 of the master units BS1 to BS4 is the master unit BS1 based on the communication between the master unit and the slave unit. Information is recorded and managed in each slave unit management table 411 of BS4. 6 and 7 are diagrams for explaining an example of a slave unit management table formed in the master unit. As shown in FIGS. 6 and 7, the number of connected units and the number of connectable units are managed in the slave unit management table 411 of the master units BS1 to BS4. The number of connected units is the number of slave units that are actually connected (accommodated) to the master unit, and the number of connectable units is the number of slave units that are not connected to the master unit but can communicate with the master unit. The number of slave units that can be connected to the unit.

Then, as shown in FIGS. 6 and 7, the slave unit ID is identification information that can identify each of the slave units that can be connected to the master unit. Further, the connected slave unit is flag information indicating the slave unit actually connected to the master unit, and is associated with the slave unit ID. The priority slave unit is flag information indicating a slave unit that preferentially communicates with the main device 1 when the distribution mode is off, and is associated with the slave unit ID. That is, from the slave unit management table 411, the slave units that can be connected to the master unit can be grasped, and among the connectable slave units, the slave units that are actually connected to the master unit can be grasped. Further, from the slave unit management table 411, among the slave units actually connected to the master unit, the slave units that preferentially communicate with the main device 1 when the distribution mode is off can be grasped.

Specifically, FIG. 6A shows an example of stored data in the slave unit management table 411 of the master unit BS1. In the slave unit management table 411 of the master unit BS1, as described above, the slave units that can be connected to the master unit BS1 are 16 slave units HS1 to HS16, which are actually connected to the master unit BS1. Is managed to be 16 slave units HS1 to HS16. Then, among the slave units actually connected to the master unit BS1, the slave units HS1, HS4, and HS7 are managed as slave units that preferentially communicate with the main unit 1 when the distribution mode is off.

Further, FIG. 6B shows an example of stored data in the slave unit management table 411 of the master unit BS2. In the slave unit management table 411 of the master unit BS2, as described above, the slave units that can be connected to the master unit BS2 are 16 slave units HS5 to HS12 and HS17 to 24, which are actually connected to the master unit BS2. It is managed that there are eight slave units, HS17 to HS24. Then, among the slave units actually connected to the master unit BS2, the slave units HS17, HS20, and HS23 are managed as slave units that preferentially communicate with the main device 1 when the distribution mode is off.

Further, FIG. 7A shows an example of stored data in the slave unit management table 411 of the master unit BS3. In the slave unit management table 411 of the master unit BS3, as described above, the slave units that can be connected to the master unit BS3 are the slave units HS11, HS12, and the slave units HS21 to HS32, and are actually connected to the master unit BS3. It is managed that the connected slave units are eight slave units HS25 to HS32. Then, among the slave units actually connected to the master unit BS3, the slave units HS25, HS28, and HS31 are managed as slave units that preferentially communicate with the main device 1 when the distribution mode is off.

Further, FIG. 7B shows an example of stored data in the slave unit management table 411 of the master unit BS4. In the slave unit management table 411 of the master unit BS4, as described above, the slave units that can be connected to the master unit BS4 are the slave units HS9 to HS14 and HS29 to HS32, which are actually connected to the master unit BS4. It is managed that there is no handset yet.

Note that the slave unit that preferentially communicates with the main device 1 when the distribution mode is off is set in the slave unit in advance, and this setting information is provided by the slave unit to the master unit. Can be managed. Further, when the slave unit is connected (accommodated) to the master unit, the master unit can determine whether or not to make the slave unit the priority slave unit. In the case of this embodiment, when the slave unit is connected (accommodated) to the master unit, the slave unit is inquired through the master unit as to whether or not to make it the priority slave unit, and the priority slave unit is inquired. If this is the case, the setting input shall be accepted through the slave unit and notified to the master unit.

Then, in the main device 1, the control circuit 12 forms the slave unit management table 14 for each master unit by receiving the storage data of the slave unit management table 411 from each of the master units BS1 to BS4. FIG. 8 is a diagram for explaining a master unit-specific slave unit management table 14 formed based on the stored data of the slave unit management table 411 acquired from each of the master units BS1 to BS4.

As can be seen from FIG. 8, the master unit-specific slave unit management table 14 contains information on the slave unit management table 411 managed by each of the master units BS1 to BS4 described with reference to FIGS. 6 and 7. In the main device 1, centralized management is performed for each master unit. That is, in the slave unit management table 14 for each master unit of the main unit 1, the number of connected units and the number of connectable units are managed for each master unit. Further, in the slave unit management table 14 for each master unit of the main unit 1, the slave unit IDs of connectable slave units (described as HS1, HS2, ... In FIG. 8) are managed for each master unit, and are actually managed for each master unit. The slave unit connected to the master unit is managed by the flag information corresponding to the slave unit ID.

Further, also in the slave unit management table 14 for each master unit of this master unit, when the distribution mode is off, the slave unit that preferentially communicates with the master unit 1 is associated with the slave unit ID. It is managed by the flag information to be set. However, in FIG. 8, for the sake of simplicity, the slave unit that preferentially communicates with the main device 1 when the distribution mode is off is associated with the slave unit ID. It is indicated by the symbol "*". As a result, in the main device 1, the management information regarding the slave units managed in each of the master units BS1 to BS4 can be centrally managed for each master unit as shown in FIG.

Then, based on the stored data of the slave unit management table 14 for each master unit shown in FIG. 8, the control circuit 12 of the main unit 1 disconnects (releases) the connection because the number of connected slave units exceeds eight. Identify the master unit in which the slave unit exists and the other master unit that will be the new connection destination of the slave unit that has been disconnected. As shown in FIG. 8, in the case of this example, 16 slave units are connected to the master unit BS1, which greatly exceeds the predetermined number of 8 slave units that can be connected. Therefore, the control circuit 12 identifies the master unit BS1 as a master unit having a slave unit that disconnects (releases) the connection because the number of connected slave units exceeds eight.

Further, as shown in FIG. 8, since eight slave units, which is a predetermined number of connectable units, are connected to the master unit BS2 and the master unit BS3, it is possible to connect to a new connection destination of the slave unit that has been disconnected. It cannot be another master unit. On the other hand, the master unit BS4 has no slave unit connected to it. Further, among the slave units connected to the master unit BS1, as shown by being surrounded by a thick line, the six slave units of the slave units HS9 to HS14 can also be connected to the master unit BS4. Therefore, the control circuit 12 of the main device 1 specifies that the master unit BS4 is another master unit to which the master unit BS4 is a new connection destination.

Then, the control circuit 12 forms and provides a control signal instructing the master unit BS1 to disconnect the six slave units HS9 to HS14. Further, the control circuit 12 forms and provides a control signal instructing the master unit BS4 to connect six slave units HS9 to HS14. As a result, in the master unit BS1, the connection failure of the six slave units HS9 to HS14 is released, and in the master unit BS4, the six slave units HS9 to HS14 are newly connected and connected to the master unit BS1 to BS4. Leveling of slave units is performed.

However, even if the connected slave units are leveled, 10 slave units are still connected to the master unit BS1, which exceeds the predetermined number of 8 units by two. Therefore, the control circuit 12 forms and provides a control signal for turning off the distribution mode to the master unit BS1. As a result, in the master unit BS1, the distribution mode is turned off, and information that should be simultaneously transmitted to each slave unit connected to the master unit BS1, for example, an incoming call notification, is given priority. It is performed only for the slave units HS1, HS4, and HS7 registered as the slave units to be performed.

As described above, in the telephone system of this embodiment, first, after the connection of the slave units is leveled, the master unit to which more slave units than the predetermined number of eight are still connected is connected. Is set to turn off the sprinkling mode. As a result, even if there is information that should be transmitted all at once to the connected slave units, the information is transmitted to the slave units that receive priority, so the information that should be transmitted all at once. It is possible to appropriately provide information to the necessary handset without causing a time loss for the transmission of.

[Processing of main device 1]
FIG. 9 is a flowchart for explaining a control process for a leveling and distribution mode of a slave unit connected to a master unit, which is performed by the main unit 1 of the telephone system of this embodiment. The process shown in FIG. 9 is a process executed at predetermined timings in the control circuit 12 of the main device 1.

When the process shown in FIG. 9 is executed, the control circuit 12 first refers to the slave unit management table 411 described with reference to FIGS. 6 and 7 for each of the master units BS1 to BS4 connected to the own unit. The information stored in is requested to be provided, and the information is acquired (step S101). Next, the control circuit 12 creates the slave unit management table 14 for each master unit described with reference to FIG. 8 based on the information of the slave unit management table 411 acquired from each of the master units BS1 to BS4 (step S102). ).

The control circuit 12 refers to the slave unit management table 14 for each master unit created in step S102, and determines whether or not the slave units connected to the master units BS1 to BS4 can be leveled (step S103). In the determination process of step S103, there is a master unit in which the number of connected slave units exceeds eight, which is a predetermined number, and among the slave units connected to the master unit, the other It is a process of determining whether or not there is a slave unit that can be connected to the master unit of.

Therefore, in the determination process of step S103, leveling is not possible (not necessary) unless there is a master unit in which the number of connected slave units exceeds a predetermined predetermined number of eight units. ). Also. In the determination process of step S103, there is a master unit in which the number of connected slave units exceeds eight, which is a predetermined number, but among the slave units connected to the master unit, there is a master unit. If there is no slave unit that can be connected to another master unit, it is determined that leveling is not possible.

It is assumed that it is determined that leveling is possible in the determination process of step S103. In this case, the control circuit 12 forms a control signal for leveling and transmits the control signal to the related master unit (step S104). Specifically, for a master unit that has a slave unit that disconnects (releases) the connection, a control signal for instructing the disconnection by designating the slave unit to be disconnected is formed and transmitted. In addition, a control signal is formed and transmitted to the master unit that is the new connection destination of the slave unit that has been disconnected by designating the slave unit to be connected.

The master unit to be leveled is not limited to one set. The master unit that disconnects the slave unit may be targeted at one or more master units, and the master unit that is the new connection destination may be targeted at one or more master units. Further, among the slave units connected to one master unit, when disconnecting a plurality of slave units, there may be a plurality of master units to be newly connected.

Then, the control circuit 12 determines whether or not there is a master unit whose distribution mode needs to be changed after the leveling (step S105). It is assumed that in the determination process of step S105, it is determined that there is a master unit that needs to change the distribution mode. In this case, the control circuit 12 forms a control signal for controlling the on / off of the distribution mode, and transmits this to the related master unit (step S106). In the control circuit 12 of the main device 1, for example, the on / off state of the current distribution mode of each master unit BS1 to BS4 is stored in the built-in memory, and the control signal is formed in consideration of this state as well. Will be done.

Specifically, based on the information in the slave unit management table for each master unit after leveling, the number of connected slave units exceeds the predetermined number of 8 master units, and the current distribution It is assumed that there is a master unit whose mode is on. In this case, the control circuit 12 forms a control signal for turning off the distribution mode, and transmits this to the master unit. In addition, based on the information in the slave unit management table for each master unit after leveling, the number of connected slave units is 8 or less, which is the predetermined number, and the current distribution mode is off. It is assumed that a master unit exists. In this case, the control circuit 12 forms a control signal for turning on the distribution mode, and transmits this to the master unit.

In the determination process of step S105, when it is determined that there is no master unit that needs to change the distribution mode, and after the process of step S106, the process shown in FIG. 9 is terminated and the next execution timing is reached. Will wait. Further, in the discrimination process of step S103, if it is determined that leveling is not possible (leveling is not necessary) in the discrimination process of step S103, the process from step S107 is performed.

In this case, the control circuit 12 determines whether or not there is a master unit that needs to change the distribution mode at present (step S107). It is assumed that in the determination process of step S107, it is determined that there is a master unit that needs to change the distribution mode. In this case, the control circuit 12 forms a control signal for controlling the on / off of the distribution mode, and transmits this to the related master unit (step S108). The process of step S108 is the same as the process of step S106.

That is, based on the information in the current slave unit management table for each master unit, the number of connected slave units exceeds the predetermined number of eight, and the current distribution mode is on. It is assumed that a master unit exists. In this case, the control circuit 12 forms a control signal for turning off the distribution mode, and transmits this to the master unit. In addition, based on the information in the current slave unit management table for each master unit, the number of connected slave units is 8 or less, which is the predetermined number, and the current distribution mode is off. Suppose that exists. In this case, the control circuit 12 forms a control signal for turning on the distribution mode, and transmits this to the master unit.

In the determination process of step S107, when it is determined that there is no master unit that needs to change the distribution mode, and after the process of step S108, the process shown in FIG. 9 is terminated and the next execution timing is reached. Will wait. In this way, the control circuit 12 of the main device 1 controls the leveling of the slave unit connected to the master unit, controls the processing, and controls the on / off of the distribution mode.

[Processing of master unit]
FIG. 10 is a flowchart for explaining a process performed in response to a control signal from the main device 1 in the master units BS1 to BS4 of the telephone system of this embodiment. The process shown in FIG. 10 is a process that is always performed in the control circuit 41 of the master units BS1 to BS4 on which the power is turned on. The process shown in FIG. 10 is a process executed in each of the master units BS1 to BS4, but here, for the sake of simplicity, the process will be described as a process performed in the master unit BS1.

The control circuit 41 of the master unit BS1 receives a control signal from the main unit 1 and a control signal from a slave unit connected to the own unit, and performs processing according to those control signals. Therefore, when the control circuit 41 of the master unit BS1 determines whether or not the control signal from the main unit 1 or the slave unit connected to the own unit has been received (step S201) and determines that the control signal has not been received. , The process from step S201 is repeated, and the arrival of the control signal addressed to the own machine is awaited.

In the determination process of step S201, when it is determined that the control signal addressed to the own unit has been received, it is determined whether or not the received control signal is a request for providing information stored in the slave unit management table from the main unit 1. (Step S202). In the determination process of step S202, it is assumed that the received control signal is determined to be a request for providing information stored in the slave unit management table 411 from the main device 1. In this case, the control circuit 41 performs a process of providing the information stored in the slave unit management table 411 to the main device 1 through the line LSI unit 42 (step S203). After that, the process from step S201 is repeated.

It is assumed that in the determination process of step S202, it is determined that the received control signal is not a request for providing information stored in the slave unit management table from the main unit 1. In this case, the control circuit 41 determines whether or not the received control signal is a control signal related to the leveling process of the slave unit from the main device 1 (step S204). In the determination process of step S204, it is assumed that the received control signal is determined to be a control signal related to the leveling process of the slave unit from the main device 1. In this case, the control circuit 41 performs a process of disconnecting the handset connected to the instructed own machine or a process of connecting the instructed handset to the own machine in response to the control signal. (Step S205). After that, the process from step S201 is repeated.

It is assumed that in the determination process of step S204, it is determined that the received control signal is not the control information related to the leveling process of the slave unit from the main device 1. In this case, the control circuit 41 determines whether or not the received control signal is a control signal for switching on / off of the distribution mode from the main device 1 (step S206). In the determination process of step S206, it is assumed that the received control signal is determined to be a control signal for switching on / off of the distribution mode from the main device 1. In this case, the control circuit 41 executes a process of turning on or off the distribution mode of the own machine according to the control signal (step S207). After that, the process from step S201 is repeated.

In the determination process of step S206, if the received control signal is determined not to be a control signal for switching on / off of the distribution mode from the main device 1, the control circuit 41 processes according to the received control signal. Is executed (step S208). After that, the process from step S201 is repeated. In the process performed in step S208, for example, lighting / extinguishing control of the LED (Light Emitting Diode) for status notification provided in the master unit BS1 and control from the slave unit are performed in response to the control signal from the main unit 1. It includes a process of notifying the main device 1 of a request corresponding to a control signal.

In this way, the master unit BS1 provides the information of the slave unit management table 411 to the main unit 1 in response to the control signal from the main unit 1, executes the process for realizing the leveling, and disperses. It is possible to execute the on / off switching process of the sprinkling mode.

[Effect of embodiment]
In the telephone system of the above-described embodiment, the master units BS1 to BSn have a slave unit connected to the own unit, a slave unit not connected to the own unit but can be connected to the own unit, and a distribution mode. When it is off, you can manage the handset management information related to the handset that receives the information preferentially. By collecting the slave unit management information from each of the master units BS1 to BSn, the main device 1 can grasp the state of the slave units for each of the master units BS1 to BSn. According to this, the main device 1 can appropriately perform the leveling control of the connection of the slave units and the on / off control of the distribution mode for the master units BS1 to BSn.

As a result, information is transmitted to all the slave units of the cordless telephone device even if the number of slave units is larger than the number that can be communicated at the same time. It is possible to prevent the case from occurring. Therefore, it is possible to reduce the communication time loss that occurs when a larger number of slave units than are capable of simultaneous communication are connected to the master unit of the cordless telephone device.

[Modification example]
In the telephone system of the above-described embodiment, the leveling process is performed for the slave units connected to the master units BS1 to BS4, and even after the leveling, the number of children exceeds a predetermined number. Changed to turn off the distribution mode for the master unit to which the unit is connected. However, the leveling process does not necessarily have to be performed. That is, the number of slave units connected to each master unit BS1 to BS4 is grasped without performing the leveling process, and the master units to which more slave units than a predetermined number are connected are scattered. You may just control to turn off the mode. In this case, the slave unit may move along with the movement of the user, and the handover may be performed to wait for the number of slave units connected to each master unit to be naturally leveled. ..

Further, in the above-described embodiment, the case where the predetermined number of slave units that can be connected to one master unit is eight has been described as an example, but the present invention is not limited to this. In the case of a DECT cordless telephone device, the predetermined number of slave units that can be connected to one master unit can be an appropriate number of 12 or less. Therefore, in a place where the environment where the cordless telephone device is installed has a lot of noise, the number of slave units that can be connected to one master unit is set small, and in a place where the influence noise is small, one master unit is set. It is possible to set a large number of slave units that can be connected to. The predetermined number of slave units that can be connected to one master unit can be registered and managed in the memory of the control circuit 12 of the main unit 1.

Further, in the case of the DECT type cordless telephone device, it has been explained that the number of channels is 5, but the smoothing of the slave unit connected to the master unit can be performed for each channel.

Further, although the on / off switching of the distribution mode has been described as being performed automatically, the present invention is not limited to this. For example, the master unit notifies the slave unit to be smoothed that the master unit to be connected is changed, and the confirmation input of the user of the slave unit is requested. Then, when the user of the slave unit inputs a confirmation input, the master unit notifies the master unit 1 of this, and the master unit and a new child that releases the connection so that the master unit 1 is finally smoothed. The master unit to which the unit is connected may be controlled to perform smoothing. That is, the smoothing can be performed according to the manual operation of the user of the slave unit.

Further, in the above-described embodiment, the case where the cordless telephone device is of the DECT type has been described as an example, but the present invention is not limited to this. Therefore, the present invention can be provided when a telephone system is constructed by using various types of cordless telephone devices capable of connecting a plurality of slave units to a master unit.

[others]
As can be seen from the description of the above-described embodiment, the functions of the storage means and the control means of the telephone control device in the claim are the slave unit management table 14 for each master unit and the control circuit 12 of the main device 1 of the embodiment. Has been realized. Further, the function of the leveling control means of the telephone control device in the claim is realized by the control circuit 12 of the main device 1 of the embodiment.

The functions of the slave unit management information storage means, the slave unit management information providing means, and the master unit control means of the cordless telephone device according to the claim are the slave unit management table 411, the control circuit 41, and the line of the master unit BS1 to BSn. The LSI unit 42 and the control circuit 41 are realized. The function of the leveling processing means of the master unit of the cordless telephone device according to the claim is realized by the control circuit 41 of the master units BS1 to BSn.

Further, the program that executes the process described with reference to the flowchart of FIG. 9 is to which one embodiment of the telephone control device program executed by the main device (telephone control device) is applied. Further, the program that executes the process described with reference to the flowchart of FIG. 10 is to which one embodiment of the cordless telephone device control program executed by the master unit of the cordless telephone device is applied.

1 ... main unit, 12 ... control circuit, 14 ... slave unit management table for each master unit, 21 to 2n ... cordless telephone device, BS1 to BSn ... master unit, HS1 to HSn ... slave unit, 41 ... control circuit, 411 ... child Machine management table, 42 ... Line LSI unit, 43 ... Synchronous signal generation circuit, 44 ... Wireless communication circuit, 441 ... Control unit, 442 ... TDMA modulation / demodulation unit, 443 ... Wireless communication unit, 51 ... Wireless communication circuit, 52 ... Control circuit , 53 ... Code code circuit, 511 ... Control unit, 512 ... TDMA modulation / demodulation unit, 513 ... Wireless communication unit

Claims (4)

The telephone control device of a telephone system configured by connecting one or more master units of a cordless telephone device capable of connecting a plurality of slave units to a telephone control device connected to a wide area network.
When the master unit has information to be transmitted to all the connected slave units, the master unit has a distribution mode which is a mode for transmitting the information to all the slave units.
Formed based on slave unit management information including information indicating a slave unit connected to the master unit provided by one or more master units and a slave unit that is not connected to the master unit but can be connected to the master unit. A storage means for storing slave unit management information for each master unit, which manages slave units that are connected to each master unit and slave units that are not connected to each master unit but can be connected .
When there is information to be transmitted to all the slave units connected to the master unit, the number of connected slave units is a predetermined number or less based on the slave unit management information for each master unit of the storage means. For the master unit, the distribution mode is turned on, and for the master unit to which the number of connected slave units is larger than the predetermined number, the distribution mode is turned off. Control means controlled by supplying a signal,
Based on the master unit-specific slave unit management information of the storage means, some of the slave units connected to one master unit in excess of the predetermined number can be disconnected and connected. With a leveling control means for supplying and controlling a control signal to the one master unit and the other master unit so as to be connected to the master unit of
Equipped with
The control means is a telephone control device that controls on / off of the distribution mode according to a connection state of a slave unit after being controlled by the leveling control means. The master unit of the cordless telephone device of the telephone system configured by connecting one or more master units of the cordless telephone device capable of connecting a plurality of slave units to the telephone control device connected to the wide area network. The master unit is provided with a distribution mode, which is a mode for transmitting the information to all the connected slave units when there is information to be transmitted to all the connected slave units. can be,
The telephone control device is a slave unit provided by one or more master units and includes information indicating a slave unit connected to the master unit and a slave unit that is not connected to the master unit but can be connected to the master unit. A storage means for storing slave unit management information for each master unit , which is formed based on management information and manages slave units connected to each master unit and slave units that are not connected to each master unit but can be connected , and the above-mentioned When there is information to be transmitted to all the slave units connected to the master unit, the number of connected slave units is less than the predetermined number based on the slave unit management information for each master unit of the storage means. A control signal is given to the master unit so that the distribution mode is turned on for a certain master unit, and the distribution mode is turned off for a master unit having more connected slave units than the predetermined number. A part of the slave units connected to one master unit in excess of the predetermined number based on the control means controlled by supplying the device and the slave unit management information for each master unit of the storage means. It is provided with a leveling control means for supplying and controlling a control signal to the one master unit and the other master unit so as to disconnect the connection and connect to another connectable master unit. The control means controls the on / off of the distribution mode according to the connection state of the slave unit after the control by the leveling control means .
The handset management information storage means for storing the handset management information and
A handset management information providing means for providing the handset management information of the handset management information storage means to the telephone control device, and a handset management information providing means.
In response to the control signal from the leveling control means of the telephone control device, the slave unit connected to the own unit is released or the new slave unit is connected to the own unit. Leveling processing means and
A master unit of a cordless telephone device, comprising a master unit control means for performing on / off switching control of the distribution mode based on the control signal from the telephone control device. The master unit of the cordless telephone device according to claim 2 .
When the distribution mode is turned off, the master unit control means originally has one or more determined slave units of the predetermined number or less among the slave units connected to the own unit. A master unit of a cordless telephone device characterized by controlling transmission of information to be transmitted to all slave units. A telephone system configured by connecting one or more master units of a cordless telephone device capable of connecting a plurality of slave units to a telephone control device connected to a wide area network.
When the master unit has information to be transmitted to all the connected slave units, the master unit has a distribution mode which is a mode for transmitting the information to all the slave units.
The telephone control device is
Formed based on slave unit management information including information indicating a slave unit connected to the master unit provided by one or more master units and a slave unit that is not connected to the master unit but can be connected to the master unit. A storage means for storing slave unit management information for each master unit, which manages slave units that are connected to each master unit and slave units that are not connected to each master unit but can be connected .
When there is information to be transmitted to all the slave units connected to the master unit, the number of connected slave units is a predetermined number or less based on the slave unit management information for each master unit of the storage means. For the master unit, the distribution mode is turned on, and for the master unit to which the number of connected slave units is larger than the predetermined number, the distribution mode is turned off. Control means controlled by supplying a signal,
Based on the master unit-specific slave unit management information of the storage means, some of the slave units connected to one master unit in excess of the predetermined number can be disconnected and connected. With a leveling control means for supplying and controlling a control signal to the one master unit and the other master unit so as to be connected to the master unit of
Equipped with
The control means controls on / off of the distribution mode according to the connection state of the slave unit after being controlled by the leveling control means .
The master unit of the cordless telephone device is
The handset management information storage means for storing the handset management information and
A handset management information providing means for providing the handset management information of the handset management information storage means to the telephone control device, and a handset management information providing means.
In response to the control signal from the leveling control means of the telephone control device, the slave unit connected to the own unit is released or the new slave unit is connected to the own unit. Leveling processing means and
A telephone system comprising: a master unit control means for performing on / off switching control of the distribution mode based on the control signal from the telephone control device.

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