JPH0530026A - Radio telephone system - Google Patents

Abstract

PURPOSE:To generate voice of a caller from each slave set in the case of simultaneous call. CONSTITUTION:The system consists of a master set 1 and plural slave sets 2-A to 2-C, and adopts the multi-channel system retrieving an idle channel through carrier sense and is a system making transmission reception of a voice signal via a speech channel with the dual communication system, and each of the slave sets 2-A to 2-C is provided with a voice generating means generating a voice signal based on the voice signal and a slave set control means sending a voice signal coming through the speech channel to the voice generating means after a simultaneous call start signal is received and the voice relating to the simultaneous call is listened to from the voice generating means of each of the slave sets 2-A to 2-C. Furthermore, the master set 1 is provided with a master set control means which monopolies a speech channel with a relevant slave set upon the detection of a reply of the slave set after the simultaneous call start signal is sent and transits to one-to-one talking.

Description

Detailed Description of the Invention

[Object of the Invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiotelephone system, and more particularly to a radiotelephone system capable of ensuring proper operation in a sound paging mode.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional radiotelephone system which employs a multi-channel system in which carrier sensing is performed to search for an empty channel, and a voice signal is transmitted and received via a communication channel by a duplex system. ing. In this system, the master unit 1 and a plurality of slave units 2-A, 2-B, 2
-C and are provided. The detailed configuration of the base unit 1 is shown in FIG.
FIG. 5 shows the detailed configuration of the slave unit 2.

The base unit 1 is provided with a call control unit 1a, which is connected to a handset 3 and a radio unit 1j surrounded by a chain line. A plurality of radio units 1j are provided according to the number of lines, and other configurations are shared. The radio unit 1j includes a PLL synthesizer unit 1c and controls the signal frequency of transmission and reception. A control signal and a voice signal are sent from the transmitter unit 1d to the slave unit 2, and a voice signal and a control signal coming from the slave unit 2 are received by the receiver unit 1e, and the control signal is a control device (CPU) 1
The voice signal to b is sent to the call control unit 1a. Transmitter section 1
The signal sent from d is transmitted from the antenna 1h via the transmission / reception shared device 1g, and the signal coming from the antenna 1h reaches from the transmission / reception shared device 1g to the receiver unit 1e. Electric field detector 1f
Detects a carrier coming from the receiver unit 1e, and the control unit (CPU) 1b allocates a communication channel based on the result. Further, the operation unit 1i is connected to the control device 1b, and various instructions can be input.

On the other hand, the slave unit 2 has a PLL synthesizer section 2
c is provided to control the transmission / reception signal frequency. A control signal and an audio signal are sent from the transmitter unit 2d to the base unit 1,
The receiver section 2e receives the voice signal and the control signal coming from the master unit 1, and sends the control signal to the control device 2b and the voice signal to the call control section 2a. The signal transmitted from the transmitter unit 2d is transmitted from the antenna 2h via the transmission / reception shared device 2g, and the signal arriving from the antenna 2h is transmitted / received shared device 2g.
To the receiver section 2e. The electric field detector 2f is the receiver unit 2
The carrier coming from e is detected, and the control device 2b sends a signal such as a call out through the control channel based on the detection. The call control unit 2a includes a handset 2j and a loud speaker 2
k is connected. Further, the control unit 2b includes an operation unit 2
i is connected and various instructions can be input.

In the radio telephone system having the above configuration, for example, when there is a call request from the handset 2 via the control channel, the base unit 1 controls the electric field detecting section 1f to perform carrier sensing and to perform emptying. A channel is detected and the channel is assigned to the slave unit 2. As a result, between the slave unit 2 and the master unit 1, for example, the frequency of the channel of the downlink (from the master unit 1 to the slave unit 2) is set to f ₁ and the frequency of the uplink (from the slave unit 2 to the master unit 1) is set. The frequency of the channel is set to f ₂ .

By the way, in the above-mentioned wireless telephone system, a simultaneous ringing such as a bell sound which does not specify the responding party is made from the handset 2.
Alternatively, it is possible from the master unit 1. At this time, when a paging call is made from the handset device 2, one call channel consisting of going up and down is set between the handset device 2 (eg, handset device 2A in FIG. 3) that made the paging call and the base device 1. Further, one different communication channel consisting of going up and down is set between the slaves 2 (plurality) (for example, slaves 2B and 2C in FIG. 3) that have received the simultaneous call and the master 1. Further, when the master unit 1 makes a simultaneous call, one unit consisting of going up and down between the base unit 1 and a plurality of slave units 2 (slave units 2-A, 2-B, 2-C in FIG. 3). The call channel is set (FIG. 3).

[0007] Here, the operation when the general call is made from the base unit 1 will be described with reference to the communication protocol of FIG. When a key operation for requesting a general call is performed on the operation unit 1i of the base unit 1, the general call request signal is received by the control device 1b, and the control device 1b shifts to the operation of securing a communication channel. That is, since the electric field detection unit 1f detects the carrier coming from the receiver unit 1e, the control device 1b controls the PLL synthesizer unit 1c and the transmitter unit 1d for allocation of the communication channel based on the result, and the control channel A channel (CH) designation signal is transmitted via. Next, the control device 1b controls the PLL synthesizer 1c and the receiver unit 1e to switch the channel to the call channel designated above and waits for the channel switching completion signal sent from the handset 2 to be sent.

On the other hand, the channel designation signals transmitted from the master unit 1 are received by the slave units 2-A, 2-B and 2-C. Therefore, the control device 2b of the slave unit 2 uses the PLL synthesizer unit 2c.
To perform a channel selection operation, shift the frequency to the designated speech channel, and send a channel switching completion signal through the speech channel. Upon receiving the channel switching completion signal, base unit 1 sends a bell ringing signal through the communication channel. The control device 2b of the handset 2 receives the bell ringing signal and controls the call control unit 2a so that it is sent to the speaker 2k, so that the ring tone (bell sound) corresponding to the paging from the speaker 2k is generated. Is emitted. Thus, a bell sound is generated for all the slaves 2 registered as the same wireless telephone system, and the unanswered paging is performed for the respondents.

Any one of the plurality of slaves 2 can respond to the simultaneous call as described above. For example, when the slave unit 2-C responds, the control device 2b detects this and gives a call response signal to the transmitter unit 2d to transmit it through the upstream communication channel. The control device 1b of the parent device 1 receives the call response signal, detects that there is a response, and transmits a call start signal in order to shift to a one-to-one call with the child device 2-C. The control device 2b of the child device 2-C that has transmitted the call response signal controls the communication path control unit 2a so that the handset 2j is connected to the transmitter unit 2d and the receiver unit 2e. As a result, the process transitions to a call process, and the slave unit and the master unit that first respond after the simultaneous call from the master unit 1 can make a one-to-one call.

[0010]

As described above, according to the conventional radiotelephone system, it is possible to make a call all at once without specifying the cordless handset to be answered, and to make an operator of one of the cordless handsets immediately to contact the operator. There is an advantage that is possible. However, according to the above-mentioned wireless telephone system, the desired slave unit is called after all the slave units (or the remaining slave units when the slave unit makes a simultaneous call) by making a simultaneous call by a voice message or the like. However, there is a problem in that when a message is to be transmitted, it is not possible to use it as a response and the message must be transmitted by making an individual call instead of calling all at once.

The present invention has been made in order to solve the problems of the conventional radio telephone system as described above, and an object thereof is to provide a radio telephone system capable of making a simultaneous call by voice such as a message. Furthermore, it is to provide a wireless telephone system capable of making a one-to-one call after that. [Structure of Invention]

[0012]

According to the present invention, a multi-channel system, which consists of a master unit and a plurality of slave units and searches for an empty channel by performing carrier sense, is adopted. A voice generating means for generating voice based on the voice signal, and a voice signal for arriving via the call channel after receiving the general call start signal to the handset of the wireless telephone system for transmitting and receiving the voice signal. The wireless telephone system is configured by including the slave unit control means for sending to the means.

Further, according to the present invention, when it is detected that the slave unit has responded to the master unit having the above-mentioned structure after the simultaneous call start signal is transmitted, a one-to-one conversation is established with the slave unit by occupying a communication channel. The wireless telephone system is configured by including a master unit control means for performing control so as to shift to.

[0014]

According to the above construction, after receiving the paging start signal, the voice signals relating to the paging are sent to the voice generating means in each slave unit. Can be done at.

Further, after the above-mentioned one-to-many call, it is possible to make a transition to the one-to-one call by a response from an arbitrary handset.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The wireless telephone system according to the present invention has, for example, a configuration as shown in FIG. 3, a master unit 1 has a configuration as shown in FIG. 4, and a slave unit 1 has a configuration as shown in FIG. Is. Since these configurations are the basic configurations as described above, duplicate description will be omitted.

In this embodiment, the slave unit 2 (2-A, 2-
The control device 2b (B, 2-C) has a program of the flowchart shown in FIG. 2 and executes it in the general calling mode, which is different from the conventional example. Below, base unit 1
The wireless telephone system according to the present embodiment will be clarified by explaining the operation when a simultaneous call is made to the child devices 2-A, 2-B, and 2-C.

For example, a key operation is performed from the operation unit 1i of the base unit 1 to input a paging request. Then, the paging request is received by the control device 1b. The controller 1b is P
The LL synthesizer unit 1c and the transmitter unit 1d are controlled to transmit an incoming signal through the control channel. This incoming signal is to be received by the slaves 2-A, 2-B, 2-C, and the control device 2b of the slave 2 has the PLL synthesizer unit 2
c, Controls the transmitter unit 2d to return an incoming call response signal.
In the above, the control device 1b of the master device 1 that receives the incoming call response signal,
An empty call channel is detected, and an empty channel (CH) designation signal is sent via the control channel to the child device 2-A,
Send to 2-B, 2-C (Fig. 1). Then, in base unit 1,
The control channel is switched to the communication channel designated for the slave unit 2, and the channel switching completion signal from the slave unit 2 is waited for. Cordless handset 2
The control device 2b has started the program of the flowchart shown in FIG. 2 and is waiting for the arrival of the channel designation signal (201). When the channel designation signal arrives, the control device 2b
Controls the PLL synthesizer section 2c to control the frequency of the call channel to perform a channel selection operation (202) and to send a channel switching completion signal via the call channel (FIG. 1). In response to this, the control device 1b of the parent device 1 transmits a paging signal through the call channel (FIG. 1). This paging start signal reaches the speaker 2l via the receiving unit 2e of the slave unit 2 and the call control unit 2a, and a tone indicating the paging start is generated. That is, the control device 2b is shown in FIG.
The arrival of the paging start signal is detected as shown in (203), and the call path is controlled so that the voice signal reaches the speaker 2k via the call control unit 2a due to the arrival of the signal (204). ). Such control is performed in all the handset units 2, and the voice related to the paging using the handset 3 from the base unit 1 is emitted from the speakers of all the handset units 2, and one-to-many one-way call. Is realized. The voice for this paging is input by the caller through the handset 3 at the time of calling, but the voice may be stored in advance. In this call state, the control device 2b of the handset 2 detects a call response (205), and when it becomes a call response, it sends a call response signal through the call channel (206) and further controls the call control unit 2a. Then, the transmitter unit 2d and the receiver unit 2e are connected to the handset 2j to switch the communication path (207).

The above-mentioned call response signal is sent to the controller 1 of the base unit 1.
received by b. The call response signal includes the individual call number of the slave unit 2 as the transmission source (in the example of FIG. 1, the individual call number of the slave unit 2-C), and the control device 1b controls the slave unit 2 concerned.
(2-C) to enter a one-to-one call with the slave unit 2 (2
-C) A call start signal including the individual call number is transmitted (Fig. 1).

On the other hand, in the handset 2, after the call response signal is transmitted as shown in FIG. 2, the control device 2b waits for the arrival of the call start signal (208). In response to the arrival of the call start signal, the handset 2 corresponding to the individual call number proceeds to a normal one-to-one call (209). On the other hand, in the handset 2 which is not transmitting the call response signal (has no call response), the flow branches to NO in step 205 to detect whether or not the call start signal arrives (210), and if it does not arrive, it again starts. Return to step 205.
As shown in FIG. 1, the control device 2b receives the call start signal when the call response signal is not transmitted like the handset devices 2-A and 2-B when the handset device 2-C responds. (To YES in step 210), it is detected that it is not a signal to the own device by the individual calling number in it, and the PLL synthesizer unit 2c is controlled to stop capturing the communication channel,
A disconnection process is performed (211).

In this manner, the call path is exclusively used between the responding slave unit 2-C and the master unit 1, and a one-to-one call is possible. Since the simultaneous call is made by voice in this way, it is possible to convey the message or contact information, and for this reason, it becomes possible for the answering side to judge who should answer. Unrelated people do not have to bother.

In the above embodiment, the simultaneous call from the master unit 1 has been described, but the simultaneous call from the slave unit 2 is also possible. In this case, the cordless handset 2 and the base unit 1
With respect to the control other than the use of another communication channel between and, the main unit 1 relays and makes a simultaneous call to the other slave units 2, so that it is the same as the embodiment.

Further, although it has been described that the base unit 1 performs the simultaneous call in the configuration in which the handset 4 is connected to the call control unit 1a and the operation unit 1i is connected to the control device 1b, the present invention is not limited to this. Alternatively, the main unit 1 may be connected to a telephone line network via one or more lines.

[0024]

As described above, according to the present invention, since the sound of paging is conducted to the voice generating means in the handset, the sound of paging can be heard by all the handsets. This is convenient when you want to make the same contact all at once.
In addition, after the simultaneous call, the communication path is exclusively used with the slave unit by the response of the slave unit, and a one-to-one call is possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a communication protocol according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the child device 2 according to the embodiment of the present invention.

FIG. 3 is a block diagram of an embodiment of a wireless telephone system.

FIG. 4 is a detailed block diagram of an embodiment of the parent device.

FIG. 5 is a detailed block diagram of an example of a child device.

FIG. 6 is a diagram showing a communication protocol by a conventional wireless telephone system.

[Explanation of symbols]

1 Master Unit 2 Slave Units 2-A to 2-C Slave Unit 4 Handsets 1a, 2a Call Control Units 1b, 2b
Control device 1d, 2d Transmitter unit 1e, 2e
Receiver section 1f, 2f Electric field detection section 1i Operation section 2j Handset 2i Operation section 2l Speaker

Claims (2)

[Claims] 1. A wireless telephone comprising a master unit and a plurality of slave units, which employs a multi-channel method of performing carrier sensing to search for an empty channel, and which transmits and receives a voice signal through a communication channel by a duplex method. In the system, the slave unit controls the slave unit to generate a voice based on a voice signal and a voice signal arriving via a call channel after receiving a simultaneous call start signal to the voice generator. And a wireless telephone system. 2. When the master unit detects that the slave unit has responded after sending the paging start signal, the master unit occupies a communication channel with the slave unit and controls to make a one-to-one call. 2. The wireless telephone system according to claim 1, further comprising a master unit control means for performing the operation.