JPH06252836A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To attain inter-slave set talking by a single master set radio section by transmission control of a slave set by an inter-slave set speech control section of a master set and transmission reception changeover based on a transmission stop signal of the slave set. CONSTITUTION:When a slave set 200 makes a call to a slave set 300, at first the slave set 200 enters an extension number of the slave set 300. A master set 100 confirms a channel idle state and returns a reply signal to the slave set 200. The slave set 200 selects a designated channel based on the signal and sends a switching end notice to the master set 100. Upon the receipt of the end signal by the master set 100, the master set returns a transmission OFF signal to the slave set 200 to set the slave set 200 to be in the transmission standby state and to send an incoming call signal to the slave set 300. When the slave set 300 returns an incoming call reply signal to the master set 100, the master set sends a designated channel to the slave set 300 to make switching request. When the master set 100 receives a switching end communication signal from the slave set 300, the master set sends a call display signal to the slave sets 200, 300. When the slave set 300 returns a reply signal, the master set 100 sets the slave set 300 to a reception standby state and sends a transmission command to the slave set 200.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone system including a master unit and a plurality of slave units, and more particularly to a cordless telephone unit capable of performing inter-slave unit communication with a single master unit wireless section.

[0002]

2. Description of the Related Art A conventional inter-slave communication system is shown in FIG. 7 in which a cordless telephone consisting of one master and two slaves is taken as an example.
And it demonstrates using FIG.

In FIG. 7, a base unit 510 is composed of two radio units 511 and 512, two voice circuits 513 and 514 corresponding to each radio unit, a data transmission / reception unit 515, a channel control unit 516 and the like.

On the other hand, the handset 520 has a radio section 521, a voice circuit 523, a channel control section 526 and a call control section 527.
Etc. Further, the child device 530 also has the same configuration.

That is, in the conventional inter-slave communication, it is necessary to set a transmission / reception communication path between the master and each slave, so that four or more channels are required. In Figure 7,
Between the main unit 510 and the slave unit 520, f1 and f2 are
It is shown that f3 and f4 are required between 10 and the child device 530.

[0006] Hereinafter, the communication sequence between the handset units will be described with reference to FIG.
Will be specifically described. First, when the extension key is input from the child device 520 (step 550), a call request is sent from the wireless unit 521 to the parent device 510 (step 551). When the base unit 510 receives the call request, the base unit 510 confirms the availability of the control channel with the channel control unit 526, and then includes the used channel (f1 for transmission of the handset 520 and f2 for reception). Response signal to handset 5
20 (step 552). The child device 520 transmits a channel switching completion signal to the parent device 510 after switching the channel based on the response signal (step 553).

When the base unit 510 receives the switching completion signal, it sends an incoming call signal to the handset unit 530 (step 55).
4). The slave unit 530 recognizes that there is an incoming call based on this signal, and returns an incoming call response signal to the master unit 510 (step 555). When the base unit 510 receives the incoming call response signal, it transmits to the handset unit 530 a channel designation signal including the number of the used channel (f3 for reception of the handset unit 530 and f4 for transmission) selected by the channel control unit 516. (Step 556). The child device 530 transmits the channel switching completion signal to the parent device 510 after switching the channel based on the channel designation signal (step 557).

When the base unit 510 receives the completion of the channel switching from the handset unit 530, the handset unit 5 sends the call display signal to the handset units 530 and 520 (step 558).
A ringing tone sounds at 30, and it can be confirmed that the handset 520 is ringing.

When a response signal is returned by off-hooking the handset on the side of the handset unit 530 (step 559), a call path is set up via the base unit 510 and a call is possible (step 560). .

When the call is to be ended, the handset is hooked on the hook to release the call path (step 561).

As described above, when making a call between handset units,
Since the base unit 510 is present, f1 and f2 channels are required between the base unit 510 and the handset unit 520, and f3 and f4 channels are required between the base unit 510 and the handset unit 530 (where f1 ≠).
In addition to f2 ≠ f3 ≠ f4), two wireless units 511 and 512 are required in the base unit 510. That is, the base unit 510
Since the frequencies of four waves are used, there is a risk of sensitivity deterioration due to spurious radiation during transmission and a risk of sensitivity deterioration due to intermodulation during reception.

Further, since two radio units and two voice circuits are required in the base unit 510, there is a problem that power consumption is high and cost is high.

[0013]

As described above, in the conventional inter-slave communication, two radio units of the master unit and four frequencies are required, so that sensitivity deterioration and consumption due to spurious emission and intermodulation occur. There was a problem that electric power became large.

Therefore, the present invention solves the above problems,
It is an object of the present invention to propose a cordless telephone device capable of performing inter-slave communication with one master radio unit and two frequencies.

[0015]

In order to achieve the above object, the present invention provides a cordless telephone apparatus comprising a master unit and a plurality of slave units connected to the master unit by a wireless line. Responds to a call from the slave unit by using the single wireless unit and from the same wireless channel between at least two slave units including the slave unit. Wireless line establishing means for establishing a wireless line, and a voice signal transmitted from the slave unit via the wireless line established by the wireless line establishing means is received by the single wireless means, and the received voice signal is received. And a voice signal relay means for transmitting a signal from the single wireless means to another child device via the wireless line established by the wireless line establishing means.

[0016]

[Operation] The base unit receiving the call request from the slave unit,
The single wireless unit is used to establish a wireless line between the at least two slave units by the wireless line establishing unit, and the voice signal relaying unit is used to establish another voice signal transmitted through the wireless line. By performing the relay operation of transmitting to the child device, a call between at least two child devices becomes possible.

When the detecting unit detects the voice interruption signal, the slave unit transmits the voice interruption signal to the master unit by the voice interruption signal transmitting unit, and then disables / receives itself. . Upon receiving the voice interruption signal from the slave unit, the master unit transmits the voice transmission enable signal to another slave unit by the transmission enable signal transmitting means. The other handset that has received the voice transmission enable signal prohibits reception of the voice signal and enables transmission.

The master unit prohibits the transmission of the voice signal of the slave unit by transmitting the transmission prohibition signal to the slave unit by the transmission prohibition signal transmitting unit, and after the wireless line is established by the wireless line establishing unit. It is possible to transmit the child device.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

First, the configuration of the present invention will be described with reference to FIG. FIG. 1 shows one master unit 100 and two slave units 2.
It shows a cordless telephone device consisting of 00/300.

The base unit 100 includes one radio unit 110, a voice circuit 120, a channel control unit 130, and a data transmission / reception unit 1.
40, the inter-slave communication control unit 150, and the like. The radio unit 110 transmits and receives radio waves, the voice circuit 120 performs voice signal conversion, etc., the channel control unit 130 performs channel control such as empty channel search, and the data transmission / reception unit 140.
The control signal modulation / demodulation, etc. are performed, and the inter-slave communication control unit 150 performs line switching control, etc., during the inter-slave communication.

The slave unit 200 includes a radio section 210 and a voice circuit 2.
20, a channel control unit 230, a call control unit 240, and the like. Here, the call control unit 240 controls the transmission / reception switch, and the voice circuit 220 is connected to a handset and a speaker. Further, the child device 300 has the same configuration as the child device 200.

As can be seen from the above configuration, the present invention is shown in FIG.
Compared to the conventional method described in 1.
Take a table-based configuration.

Next, a call sequence for carrying out a call between handset units based on the above configuration will be described with reference to FIG.

When making a call from the handset 200 to the handset 300, first, the extension number of the handset 300 is input from the handset of the handset 200 (step 400). By this input, a calling signal is transmitted from the child device 200 to the parent device 100 (step 401), so that the parent device 100 confirms the channel availability (step 402) and sends a response signal to the child device 20.
Reply to 0 (step 403). The child device 200 switches to the designated channel based on this signal and transmits a switching completion notification signal to the parent device 100 (step 404).

When the base unit 100 receives the channel switching completion signal, it sends back a transmission off signal to the handset unit 200 (step 405) to put the handset unit 200 in a transmission standby state and to send an incoming call signal to the handset unit 300. Is transmitted (step 40
6) Tell that there is a call request. When the incoming call response signal is returned from the child device 300 to the parent device 100 (step 407), a designated channel signal is transmitted to the child device 300 (step 408) to request channel switching.
When the parent device 100 receives the switching completion notification signal from the child device 300 (step 409), it sends a call display signal to the child devices 200 and 300 (step 410).

When the slave unit 300 goes off-hook and returns a response signal (step 411), the master unit 100 receives the slave unit 2
00 and a reception on signal to the handset 300 (step 41).
2) After sending the slave unit 300 to the receiving state, it issues a transmission instruction to the slave unit 200 in the transmission standby state. In addition, switching control of the inter-handset call control unit 150 is also performed (step 41).
3) Make bypass connection for inter-slave communication.

According to the above procedure, the slave unit 200 and the slave unit 300
A communication path is set up between the child device 200 and the child device 300.
It becomes possible to talk to (step 414).

When the transmission of the handset 200 is completed, the transmission off signal is transmitted to the base unit 100 by the user of the handset 200 pressing a key or pressing the microphone switch (step 415). In this way, while displaying the intention to stop the transmission of the child device 200 and shift to the receiving state,
In preparation for a call from the child device 300, a transition is made to the receiving state.

In response to the transmission on signal from the base unit 100 which has received the transmission off signal (step 416), the slave unit 30
At 0, the communication path is set by switching to the reception off / transmission on state (step 417). After that, steps 414 to 418 are repeated, and the inter-slave communication is performed while switching the departure and arrival points.

At the time of ending the call, the calling side slave unit goes on-hook to transmit the end call signal to the partner side slave unit via the master unit 100 (step 416) to release the communication path. Will be done.

As can be seen from the above, the master unit 100 sets the transmission frequency f1 and the reception frequency f2 to the slave units 200/3.
In 00, since the inter-slave communication can be realized by constantly using the transmission frequency f2 and the reception frequency f1 together, the required frequency can be limited to two waves.

Next, the master unit 100 in the above sequence
Each operation of the slave unit 200 will be described with reference to FIGS. 3 and 4. As shown in FIG. 3, the parent device 100 includes a radio unit 110, a channel control unit 130, a transmission voice compander 121, a reception voice compander 122, and a switch 12.
3, 124, a modem 141, a data transmitter 142, a data receiver, a switch controller 151, a switch 152, a transmission switch 153, and the like.

The operation of the master unit 100 in steps 401 to 403 and steps 411 to 413 in FIG. 2 will be described below.

In steps 401 to 403, the slave unit 200
When the call signal from the wireless communication unit 110 is received by the wireless unit 110, first, the channel control unit 130 confirms that the control channel is empty, and then the response signal is transmitted from the data transmission unit 142 to the modem 14.
1 to the wireless unit 110 to transmit to the child device 200. At this time, the transmission switch 153 is turned on.

In steps 411 to 413, the slave unit 300
If a response signal associated with the off-hook of the
After transmitting a transmission off / reception on signal 00 to the slave device 200 and a transmission on / microphone on signal to the child device 200 in the same procedure, the switch control unit 151 controls the switch 152 to be turned on to form a speech path.

FIG. 4 is a detailed block diagram of the slave unit 200. As shown in FIG. 4, the slave device 200 includes a radio unit 210, a channel control unit 230, a transmission voice compander 221, a reception voice compander 222, and a switch 22.
3.224, modem 241, data transmission unit 242, data reception unit 243, switch control unit 251, transmission switch 253, input determination unit 261 corresponding to input of extension key 261 and interruption detection unit for detecting input of transmission interruption key 263. H.264, handset 265, receiver 266 and the like.

Although the child device 200 is illustrated in this example, the child device 300 also has the same configuration and the following operation.

Hereinafter, the slave unit 20 having the above-mentioned configuration in the case of steps 400 to 401 and steps 415 to 417 in FIG.
The operation of 0 will be described.

In steps 400 to 401, the extension key 2
When 61 is input, the input determination unit 262 recognizes that an inter-slave-to-speech call request to the slave device 300 has been input, and sends a call signal to the data transmission unit 242 to the modem 241 to the wireless unit 210.
It will be transmitted to the base unit 100 via.

In steps 415 to 417, the interruption detection unit 264 recognizes that the transmission is interrupted by inputting the interruption key 263 when the transmission is interrupted, and similarly transmits the transmission off signal to the master unit 100, and then transmits the transmission. The switch 253 is turned off to shift to the reception state.

As described above, according to the present invention, it is possible to reduce the power consumption by reducing the power consumption of the base unit, which has conventionally required two units, to one unit, and also, the conventional four-wave channel is changed to two-wave spurious. Desensitization associated with radiation and intermodulation can be eliminated.

Further, in the above example, the call between the two handset units was illustrated, but the present invention can be applied to a cordless telephone having three or more handset units as shown in FIG.

In a cordless telephone having three or more cordless handsets, telephone conversation between cordless handsets may include a telephone conversation between cordless handsets between two arbitrary parties and a conference call between cordless handsets of three or more cordless handsets.

First, description will be made on a case where a call between handset units is made between two arbitrary parties.

When a call is made from the handset 640 to the handset 630, the handset 640 needs to make a key input (step 400 in FIG. 2).
Since the cordless handset of the other party cannot be specified, a call signal is transmitted using a cordless handset designation key that can be designated. And
The sequence of steps 401 to 420 in FIG. 2 is executed while specifying the called station based on the calling signal to set / switch the communication path.

Next, a case where a conference call is made between three or more handset units will be described.

When a conference call is made by calling the slave unit 640, a conference connection key for requesting a conference connection is input from the slave unit 640. After the key input, steps 401 to 4 in FIG.
05, the slave unit 640 waits for transmission, and step 406 in FIG. 2 between the master unit 610 and each of the slave units 620 and 630.
To 411 to confirm the off-hook of the slaves 620 and 630, switch the slaves 620 and 630 to the receiving state, set the slave 640 to the transmitting state, and switch the master unit (steps 412 to 413 in FIG. 2). . By the above procedure, the communication path shown in FIG. 5 is set.

After inputting an extension number in place of the interruption key input in step 415 in FIG. 2, 416 to 41 in FIG.
8 to switch the communication path.

Then, the process ends with steps 419 to 420 in FIG.

As described above, even in a call between three or more handset units, a call between any two handset units (POINT TO POINT) and a conference call with a calling handset designation can be performed by one base unit radio. Division and 2
It can be realized by using the frequency of the wave.

Next, an example in which the VOX (Voice Operated Transmitter) system is applied to the cordless telephone device according to the present invention will be described.

The VOX system detects a silent section in which the input level on the transmitting side is below a threshold value for sound / silence determination, and stops the transmission on the transmitting side in this silent section.
On the receiving side, in order to reduce the unnaturalness of the call due to the stop of the transmission, this is a method controlled by the power information sent from the transmitting side.

In the cordless telephone device shown in the above example, the interruption key 263 is used for switching the transmission / reception between the slaves. However, if the VOX method is applied, it is not necessary to manually switch between transmission and reception using the interruption key.
It is possible to realize a cordless telephone device that effectively utilizes silence.

FIG. 6 is a detailed block diagram of the master unit in the cordless telephone system using the VOX system. The configuration of the base unit is almost the same as that of the base unit described in FIG. However, in FIG. 4, the interruption detection unit 264 detects the input of the interruption key 263 and shifts to the transmission / reception switching operation.
In FIG. 6, the interruption detecting unit detects the silent state of the microphone 266, and the transmission / reception switching is performed under a certain fixed condition.

Further, by centrally managing the transmission timing of the slave unit in the master unit, it is possible to automatically switch between transmission and reception as in the VOX system.

Furthermore, it is also possible to add an interrupt call function to each of the above examples.

[0058]

As described above, according to the present invention, the transmission control of the slave unit by the inter-slave communication control unit of the master unit,
By switching the transmission / reception based on the transmission stop signal of the handset, a single handset radio unit can communicate with the handset.

Also, by using the extension number, it becomes possible to conduct a conference call between the handset units using a single base unit radio section.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of a cordless telephone device according to the present invention.

FIG. 2 is a diagram for explaining a call sequence of the cordless telephone device shown in FIG.

FIG. 3 is a detailed block diagram of a master unit in the cordless telephone device shown in FIG.

FIG. 4 is a detailed block diagram of a child device in the cordless telephone device shown in FIG.

FIG. 5 is a block diagram illustrating a conference call between handset units when there are three handset units.

FIG. 6 shows V in the cordless telephone device according to the present invention.
The detailed block diagram of the main | base station which used the OX system.

FIG. 7 is a block diagram showing a configuration example of a cordless telephone according to a conventional method.

FIG. 8 is a diagram for explaining a call sequence of the cordless telephone shown in FIG.

[Explanation of symbols]

 100 master unit 200,300 slave unit 110,210,310 wireless unit 120,220,320 voice circuit 130,230,330 channel control unit 140 data transmitter / receiver unit 240,340 call control unit 150 call control unit between slave units

Claims (3)

[Claims] 1. A cordless telephone device comprising a master unit and a plurality of slave units connected to the master unit by a wireless line, wherein the master unit comprises a single wireless unit and a call from the slave unit. A wireless line establishing unit that uses the single wireless unit in response to a call and establishes a wireless line consisting of the same wireless channel with at least two slave units including the slave unit; The single wireless means receives the voice signal transmitted from the slave unit through the wireless line established by the establishing means, and the received voice signal is passed through the wireless line established by the wireless line establishing means. And a voice signal relay means for transmitting from the single wireless means to another slave unit. 2. The slave unit includes a detection unit that detects interruption of input of a voice signal, and a unit that transmits a voice interruption signal to the master unit in response to the detection of the detection unit, The master unit comprises means for transmitting a voice transmission enable signal to another slave unit in response to receiving a voice interruption signal from the slave unit, and the slave unit that has transmitted the voice interruption signal is a voice signal. Of the audio signal from other slaves, and the slave that has received the audio transmittable signal enables the transmission of the audio signal and transmits the audio signal from the other slaves. The reception is prohibited, wherein the reception is prohibited.
Cordless telephone device described. 3. The master unit comprises means for transmitting a transmission prohibition signal to the calling slave unit in response to a call from the slave unit, wherein the calling slave unit is In response to the reception of the transmission prohibition signal, the transmission of the voice signal is prohibited, and the transmission of the voice signal is enabled after the wireless line is established with the other handset by the wireless line establishing means. The cordless telephone device according to claim 1, which is characterized in that.