JP3191595B2 - Transmission / reception control method for wireless telephone system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone for communicating between a base unit and a child unit using a radio wave, a portable telephone for communicating between a base station and a mobile unit, and a personal handy phone. The present invention relates to reducing power consumption during a call holding in a wireless telephone system such as a system.

[0002]

2. Description of the Related Art Conventionally, in a radio telephone system, if the telephone does not have a call holding function or has a call holding function, a hold tone generating circuit inside the radio telephone which held the call when the call was put on hold is operated. Was put on hold in the transmitted radio wave. On the other hand, there has been known an apparatus that detects this when a call is in a silent state and reduces power consumption by performing intermittent transmission.

FIG. 7 is a block diagram showing the configuration of a conventional radio telephone. In FIG. 7, reference numeral 1 denotes a radio unit which performs a radio transmission / reception function, and 2 denotes a receiver unit which constitutes a reception function part of the radio unit 1. Reference numeral 3 denotes a transmitter unit which constitutes a transmission function part of the radio unit 1, and 4 denotes a transmitter connected to the receiver unit 2 and the transmitter unit 3 for transmitting a radio signal to a space or receiving an external radio signal. 5 is a receiver that converts a signal from the receiver unit 2 into a sound, 6 is a microphone that converts a sound into an electric signal, and 7 is a control unit that controls the radio unit 1.

[0004] Reference numeral 8 denotes a hold switch for performing a hold operation for putting a telephone line in a hold state, and outputs a signal of logic "1" when held and a signal of logic "0" when not held. 9 is microphone 6
The voice detection unit 10 detects the presence or absence of a sound and silence from the voice signal and outputs a signal of logic “1” when there is no sound, and outputs a signal of logic “0” when there is sound. The hold control line 12 for transmitting a signal is a VOX (“Voice Operated Transmitte”) for transmitting a logical signal from the voice detection unit 9.
r ", voice operation) control line, which is connected to the transmitter unit 3. Reference numeral 13 denotes a hold sound generation circuit which is connected to the hold control line 10 and generates a hold sound at a logic "1" and places it on a transmission signal.

A microphone switch 14 is connected to the hold control line 10 and opens the signal line of the microphone 6 with a logic "1". FIG. 8 is a timing chart showing the relationship between the state of the wireless telephone configured as shown in FIG. 7 including before and after the call holding and the radio wave use state. In FIG. 8, reference numeral 201 denotes the operation state of the wireless telephone by the operator. , 202 are radio wave time slot use states allocated to the wireless telephones.
202a is an audio signal TCH (“TrafficChannel”).
"Traffic channel, call channel) information.

Next, the operation will be described. When the operator presses the hold switch 8 during a call, the hold switch 8 is turned on and outputs a logical “1”. The control signal of logic “1” is transmitted to the hold sound generation circuit 13 and the microphone switch 14 via the hold control line 10, and the hold sound generation circuit 13
Upon receiving this signal, a hold tone is generated and output as information on the transmitting side. When the microphone switch 14 receives the control signal of logic "1", the switch is opened, and the audio signal from the microphone 6 is cut off. As a result, only the hold sound from the hold sound generation circuit 13 is used as information on the transmission side. It is input to the transmitter unit 3.

On the other hand, the voice detector 9 detects a hold tone and determines that there is a voice.
And the transmitter unit 3 receiving this signal does not perform VOX control. As a result, the holding sound is transmitted wirelessly from the transmitter unit 3 through the antenna 4, and the holding sound is transmitted to the other party. If the voice signal from the microphone 6 is interrupted for a certain period of time during a call, the voice detection unit 9 detects this and outputs a logical “1” to the VOX control line 12. The machine unit 3 performs known VOX control, and transmission is performed with power saving.

[0008]

Since the conventional radio telephone system is configured as described above, an audio signal is not actually input from a microphone when a call is held, but an audio signal is input in a call channel. However, there is a problem that unnecessary power is consumed by transmitting or receiving a radio wave even though it is not necessary to transmit the radio wave.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a transmission / reception control method for a wireless telephone system that can suppress power consumption during a call holding.

[0010]

SUMMARY OF THE INVENTION A transmission / reception control method for a wireless telephone system according to the present invention detects presence / absence of a voice signal, and
Transmission of wireless telephone system that intermittently transmits transmission radio waves during sound
In the receiving control method, when the call is put on hold at the transmitting side,
Hold open, indicating the onset of a call on hold without sending a hold tone
Initial data is transmitted from the transmitting side to the receiving side.
Intermittent transmission of transmission radio waves with the call on hold as silence
It is.

Also, the presence or absence of voice is detected.
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The receiving side that receives the
It is used to intermittently transmit radio waves.

Also, the presence or absence of voice is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The sending side that has sent the
It is for intermittently receiving radio waves.

Also, the presence or absence of sound is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
The receiving side that intermittently transmits the transmission radio wave with the staying time as silence and receives the hold data intermittently receives the reception radio wave with the call holding time as silence. Also, the presence or absence of voice
Wireless telephone system that detects and intermittently transmits transmission radio waves when there is no sound.
In the transmission / reception control method of the system, the call is held on the transmission side.
In this case, the transmitting side transmits the hold data from the transmitting side to the receiving side, and the receiving side that receives the hold data generates a holding tone when the call is held, and outputs the holding tone from the receiving side. It also detects the presence or absence of voice, and transmits
Transmission / reception control method for wireless telephone systems that intermittently transmit waves
If the sender puts the call on hold, it will be received from the sender
The hold data is transmitted to the receiving side, and the receiving side receiving the hold data generates a hold tone when the call is held, and transmits the hold tone to the transmitting side.

[0014]

The transmission / reception control method of the wireless telephone system according to the present invention detects presence / absence of voice, and transmits a transmission radio wave when there is no sound.
In transmission / reception control method of wireless telephone system that performs intermittent transmission
When a call is put on hold at the sending side,
Sending the hold start data indicating the start of call hold to the sender
Then sends it to the receiver, and then the sender silences the call
Sometimes transmission radio waves are intermittently transmitted.

Also, the presence or absence of voice is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The receiving side that receives the
Transmit intermittently the radio wave.

Also, the presence or absence of voice is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The sending side that has sent the
Intermittently receive radio waves.

Also, the presence or absence of voice is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The receiving side receives this call hold time as silence
Intermittently receive radio waves. It also detects the presence or absence of audio,
Transmission of wireless telephone system that intermittently transmits transmission radio waves during sound
In the receiving control method, when the call is put on hold at the transmitting side,
Send pending data from the sending side to the receiving side,
The receiving party generates a music on hold when the call is put on hold.
Then, the hold sound is output from the receiving side. Also, audio
Radio that detects the presence / absence and intermittently transmits transmission radio waves when there is no sound
In the transmission / reception control method of the telephone system,
When the call is put on hold, the sender sends the hold data to the receiver
The receiving party receives the hold data and
Generate a music on hold and send this music on hold to the sender.
You.

[0018]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a slave unit when a personal handy phone system is taken as an example of the wireless telephone system of the present invention. In FIG. Is a receiver unit constituting the reception function part of the radio unit 1, and 3 is a transmission function unit of the radio unit 1, and VOX (“Voice Operated Transmitt”)
er ", voice operation) The transmitter unit 4 having a control function is connected to the receiver unit 2 and the transmitter unit 3 to transmit a radio signal to a space or to receive an external radio signal. Antenna.

Reference numeral 5 denotes a receiver for converting a signal from the receiver unit 2 to sound, 6 denotes a microphone for converting sound to an electric signal, 7
Is a control unit for controlling the radio unit 1, 8 is a hold switch for performing a hold operation for putting the telephone line on hold, 9 is a unit for detecting presence or absence of sound from the microphone 6, and when there is no sound, a logic " The voice detection unit 10 outputs a signal of logic “0” when the voice signal is “1”, and a hold control line 10 transmits a logic signal from the hold switch 8 to the control unit 7.

Reference numeral 11 denotes a logical sum circuit for calculating a logical sum of a logical signal from the control unit 7 and a logical signal from the voice detection unit 9 and outputting the logical sum. When "1" is OFF, a signal of logic "0" is output to the OR circuit 11, respectively. Reference numeral 12 denotes a VOX control line for transmitting a logic signal output from the OR circuit 11 to the transmitter unit 3.

FIG. 2 is a timing chart showing a signal state when the call is on hold. In the figure, 101 is the state of the hold switch 8, 102 is the state of the VOX signal, 103 is the operation state of the transmitter unit 3, and 104 is the antenna. 4 shows the contents of the transmission signal transmitted from the transmission signal No. 4, respectively. FIG. 3 is a timing chart showing the relationship between the state of the telephone including before and after call holding and the state of using radio waves. In the figure, 201 indicates the state of the radio telephone operated by the operator, and 202 indicates the allocated radio transmission radio wave. Shows the time slot usage state of the time slot.

Among them, 202a is a TC which is an audio signal.
H information, 202b indicates VO indicating that the VOX operation is being performed.
X data and intermittent transmission data. The T1 slot is a transmission slot allocated to the wireless telephone, and the R1 slot is the same reception slot. Further T
A portion indicated by a dotted line in one slot is a slot which can be transmitted by the wireless telephone, but is a timing at which the wireless telephone is not transmitting by the VOX function.

Next, the operation will be described. When the operator presses the hold switch 8 during a telephone call with the master unit, the hold switch 8 is turned on as indicated by 101 in FIG. At the same time, the hold switch 8 outputs a logic “1”, and this logic signal is sent to the controller 7 via the hold control line 10.
Is input to The control unit 7 outputs a signal of logic “1” to the OR circuit 11 based on the logic signal. The logical sum circuit 11 receives the signal of the logic “1” from the control unit 7, so that the voice detection unit performs a logical sum regardless of the logic “1” indicating silence or “0” indicating sound. "1" is output.

The output logical sum "1" is input to the transmitter unit 3 via the VOX control line 12. Thus, as shown in FIG. 2, the logic signal on the VOX control line 12 is always "1" when the hold switch 8 is ON. The transmitter unit 3 performs VOX operation based on this logical signal, that is, sends VOX start data to a wireless communication partner station such as a master unit, and then transmits the VOX start data.
The in-OX data 202b is intermittently transmitted as shown in FIG. 2 or 102. This VOX operation has the same control contents as when the audio signal from the microphone 6 is silent and the logical sum of the logical sum circuit 11 is “1”, and the transmission operation of the transmitter unit 3 is performed by the same means as the normal one. Control is performed to suppress the current value to / 4.

As described above, while the hold switch 8 is ON, the VOX operation state is established regardless of whether the sound signal of the microphone 6 is silent or sound. Then, when the operator releases the hold switch 8 again, the state is turned off and the logic "0" is output. As a result, the control unit 7 outputs a logical “0” to the logical sum circuit 11, and the logical sum circuit 11 outputs a logical sum “0” unless the logical signal from the voice detection unit 9 is “1” indicating no sound. . Then, in response to this signal, the transmitter unit 3 sends the TCH information 202a to the partner station to notify the end of the VOX operation and return to the normal voice communication.

If the logical signal from the voice detecting section 9 is "1" indicating no sound, the logical sum is "1".
After the suspension is released, the VOX operation state continues. By the way, since there is often a silent state in which no sound is input from the microphone during the hold, once the hold is released, the sound detection unit 9 is temporarily stopped.
If the logic signal from the control unit is forcibly set to "0" and there is no sound for a predetermined period of time, the logic "1" is output from the voice detection unit 9 again, or the logic signal from the control unit is A configuration may be adopted in which a signal of the logical sum “0” is output from the logical sum circuit 11 for a certain period of time from the time when the logical sum changes from “1” to “0”.

In the former case, a control signal must be transmitted from the control section 7 or the hold switch 8 to the voice detection section 9. With such a configuration, when the call is resumed after the hold is released, the beginning of the conversation due to the VOX operation does not occur. In addition, while the slave unit performs the VOX operation, the master unit that wirelessly communicates with the slave unit can perform the intermittent reception, so that such a configuration can reduce the power consumption of the master unit. According to the present embodiment, the same VOX operation as in the silent state is performed even in the hold state, so that the power consumption of the wireless telephone can be reduced.

Embodiment 2 FIG. FIG. 4 is a block diagram showing the configuration of a slave unit of a wireless telephone system according to another embodiment. In the drawing, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. Reference numeral 14 denotes a microphone switch which is controlled by the control unit 7 and opens and closes an audio signal line from the microphone 6. Further, an output signal from the voice detection unit 9 is directly input to the transmitter unit 3 via the VOX control line 12. Other configurations are the same as in the first embodiment.

Next, the operation will be described. In the first embodiment, a logical sum of an output signal from the control unit 7 based on the state of the hold switch 8 and an output signal from the voice detection unit 9 is calculated and VO
In the present embodiment, the control unit 7 performs the X operation.
Detects the ON / OFF state of the hold switch 8, and controls the opening and closing of the microphone switch 14 based on the detection result. That is, if the hold switch is turned on and the hold state is set,
The control unit 7 opens the microphone switch 14 and does not transmit an audio signal. Further, when the hold switch is turned off and is not in the hold state, the control unit 7 closes the microphone switch 14 and outputs an audio signal to the transmitter unit 3.

When the microphone switch 14 is opened, the audio detector 9 does not detect an audio signal.
Is output to the transmitter unit 3 via the VOX control unit 12, and the transmitter unit 3 performs a VOX operation. When the hold state is released, the microphone switch 14 is closed and an audio signal is taken into the transmitter unit. At this time, if there is no audio input from the microphone 6 and there is no sound, the VOX operation is continued and the If it is a sound, the VOX operation ends, and a normal call state is established. With such a configuration, it is possible to cut off the audio signal from the microphone 6 at the time of holding and generate a silent state for performing the VOX operation with one switch, so that the present invention can be realized with a simple configuration.

Embodiment 3 FIG. FIG. 5 is a timing chart showing the relationship between the state of the slave unit including before and after the call holding of the wireless telephone system and the radio wave use state in another embodiment. In the figure, reference numeral 202c denotes holding start data indicating the start of the call holding. , 202d are hold end data indicating the end of call hold. Other points are the same as those in FIG. 3, and the same or corresponding parts are denoted by the same reference characters and description thereof is omitted.
The basic configuration of the telephone is the same as that of FIG. 1 or FIG.

Next, the operation will be described. During a normal telephone call by wireless communication, the telephone transmits call information in the time slot T1 and receives it in the time slot R1. Then, when the operator presses the hold switch 8, the slave unit transmits the hold start data 202c to the master unit, and then enters a state similar to the silent state by the same procedure as in the first or second embodiment, and
After sending the X data during X 202b, the VOX sending the data during VOX 202b intermittently to its own time slot
Move to operation. As a result, power consumption for transmission is reduced, and power saving can be achieved. Then, when the operator operates the hold switch 8 again to release the hold, the slave transmits the hold end data 202d and returns to the normal call state.

By transmitting the hold start data and the hold end data to the wireless communication partner in this way, it is possible to identify whether the partner has simply entered the VOX operation due to the silent state or has entered the hold state. Will be able to Therefore, when the other party is a base station such as a base station and the power can be stably secured, a hold sound generation circuit is mounted on the base station side and hold start data is transmitted from the mobile station as a slave station. After that, if the base station generates a hold tone and places it on the telephone line, the wireless communication line can emit a hold tone on the telephone line while performing the VOX operation. It becomes possible to keep the same state as the holding state, and the weight of the slave unit can be reduced.

If the hold tone generating circuit is provided not only on the base station side but also on the slave side, the hold tone can be emitted on the slave side as the transmitting side while performing the VOX operation. Further, even when the hold sound from the hold sound generation circuit of the master unit is wirelessly transmitted to the slave unit, the slave unit can emit the hold sound while reducing the transmission power. In addition, since there is generally no call in both directions during the hold, the control unit of the master unit that has received the hold start data 202c from the slave unit,
Thereafter, the transmission from the master unit is subjected to the VOX control operation by the same means as in the first or second embodiment until the hold end data 202d is received, so that the power consumption of the master unit can be reduced.

Embodiment 4 FIG. FIG. 6 is a timing chart showing the relationship between the state of the slave unit including before and after the call holding of the wireless telephone system according to another embodiment and the state of use of radio waves. This is a slot in which the telephone can receive, but this radio telephone is not receiving data due to the VOX function. Other points are the same as those in FIG. 5, and the same or corresponding parts are denoted by the same reference characters and description thereof will be omitted. The basic configuration of the telephone is the same as that of FIG. 1 or FIG.

Next, the operation will be described. During a normal telephone call by wireless communication, the telephone transmits call information in the time slot T1 and receives it in the time slot R1. Then, when the operator presses the hold switch 8, the slave unit transmits the hold start data 202c to the master unit, and then enters a state similar to the silent state by the same procedure as in the first or second embodiment, and
After sending the X data during X 202b, the VOX sending the data during VOX 202b intermittently to its own time slot
Move to operation.

On the other hand, the master unit having received the hold start data
In response to the intermittent transmission of the slave unit, it enters the intermittent reception state. And
The master unit itself performs a VOX operation of intermittently transmitting the VOX data 202b to the slave unit, and accordingly, the slave unit performs intermittent reception. Then, when the operator operates the hold switch 8 again to release the hold, the slave unit stores the hold end data 202.
Then, d is transmitted to return to the normal transmission state. In addition, the master unit that has received the hold end data 202d also returns to the normal transmission state, the reception of the slave unit also returns to the normal state, and returns to the normal call state as a whole.

By transmitting the hold start data and the hold end data to the wireless communication partner in this way, it is possible to identify whether the partner has simply entered the VOX operation due to the silent state or has entered the hold state. Will be able to Therefore, the other party also responds to the hold operation of the transmitting
The X operation can be performed, and the power consumption of the transmitter and the receiver can be reduced on both the transmitting and receiving sides during the hold, and further power saving can be achieved.

[0039]

As described above, according to the present invention, the voice
To detect the presence or absence of
In the transmission / reception control method of the line telephone system,
If you put a call on hold, hold the call without sending a hold tone
From the sending side to the receiving side
After that, the transmitting side sets this call hold time to
Intermittent transmission of waves reduces power consumption of wireless telephones
And the other end of the wireless communication is silent.
To identify intermittent transmissions for intermittent transmission
The effect that it becomes possible to obtain is obtained.

The presence or absence of voice is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The receiving side that receives the
Since the radio wave is intermittently transmitted, the receiving
Of reducing transmission power consumption of the machine
Is obtained.

Also, the presence or absence of voice is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The sending side that has sent the
Since the radio wave is intermittently received, the transmitting side consumes less received power.
The effect of being able to reduce is obtained.

Also, the presence or absence of voice is detected, and when there is no sound,
Transmission / reception control method for wireless telephone systems that intermittently transmit radio waves
According to the law, if a call is put on hold at the sender,
The hold data is transmitted to the receiving side, and the transmitting side thereafter
Transmitting radio waves intermittently with the idle time as silence, and holding data
The receiving side receives this call hold time as silence
Intermittent reception of radio signals reduces power consumption of wireless telephones
The effect of being able to reduce is obtained. Also voice
To detect the presence or absence of
In the transmission / reception control method of the line telephone system,
If the call is put on hold, the sender sends the hold data to the receiver.
The receiving party that received the hold data
Music on hold, and this hold sound is output from the receiving side.
On-hold sound while reducing power consumption of the wireless telephone.
The effect of being able to produce is obtained. Also detects the presence of audio
Wireless telephone system that intermittently transmits radio waves when there is no sound.
In the sending and receiving control method of the
In this case, the sender sends the hold data to the receiver,
The receiving party that receives the data issues a hold tone when the call is on hold.
To send the music on hold to the sender.
Side can emit hold music while reducing transmission power.
The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a handset of a personal handyphone system in a wireless telephone system according to a first embodiment of the present invention.

FIG. 2 is a timing chart showing a signal state of a slave unit in a call holding state in the wireless telephone system according to the first embodiment of the present invention.

FIG. 3 is a timing chart showing the relationship between the state of the handset including before and after call holding and the radio wave use state in the wireless telephone system according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a handset of a personal handyphone system in a wireless telephone system according to a second embodiment of the present invention.

FIG. 5 is a timing chart showing the relationship between the state of the slave unit including before and after the call holding and the radio wave use state in the wireless telephone system according to the third embodiment of the present invention.

FIG. 6 is a timing chart showing the relationship between the state of the slave unit including before and after the call holding and the radio wave use state in the wireless telephone system according to the fourth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a cordless telephone handset in a conventional wireless telephone system.

FIG. 8 is a timing chart showing a relationship between a state of a slave unit including before and after call holding and a radio wave use state in a conventional wireless telephone system.

[Explanation of symbols]

1 Radio unit, 2 Receiver unit, 3 Transmitter unit, 4
Antenna, 5 receiver, 6 microphone, 7 control unit, 8 hold switch, 9 voice detection unit, 10
Hold control line, 11 OR circuit, 12 VOX control line, 13 hold sound generation circuit, 14 microphone switch, 101 hold switch state, 102 VOX signal state, 103 operation state of transmitter section 3, 104
Contents of transmission signal, 201 Status of wireless telephone, 20
2 Time slot use state, 202a TCH (voice signal) information, 202b VOX data, 202c hold start data, 202d hold end data

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B ^7/ 24-7/26 H04M 1/725 H04M 1/80 H04Q 7/00-7/38

Claims (6)

(57) [Claims] In a transmission / reception control method of a wireless telephone system for detecting presence / absence of voice and intermittently transmitting a transmission radio wave when there is no sound, when a call is put on hold at a transmission side, the call holding is started without transmitting a hold sound. A transmission / reception control method for a wireless telephone system, characterized in that the hold side is transmitted from the transmission side to the reception side, and thereafter the transmission side intermittently transmits a transmission radio wave with the call holding time being silence. 2. A transmission / reception control method for a wireless telephone system which detects presence / absence of voice and intermittently transmits a transmission radio wave when there is no sound. When a call is put on hold at a transmission side, hold data is transmitted from the transmission side to a reception side. Thereafter, the transmitting side intermittently transmits a transmission radio wave with the call holding time being silence, and the receiving side receiving the hold data intermittently transmits a transmission radio wave with the call holding time being silence. A transmission / reception control method for a wireless telephone system. 3. A transmission / reception control method for a wireless telephone system which detects presence / absence of voice and intermittently transmits a transmission radio wave when there is no sound. When a call is put on hold at a transmission side, hold data is transmitted from the transmission side to a reception side. Thereafter, the transmitting side intermittently transmits a transmission radio wave with the call holding time being silence, and the transmitting side that transmits the hold data intermittently receives a reception radio wave with the call holding time being silence. A transmission / reception control method for a wireless telephone system. 4. A transmission / reception control method for a wireless telephone system which detects presence / absence of voice and intermittently transmits a transmission radio wave when there is no sound. When a call is put on hold at a transmission side, hold data is transmitted from the transmission side to a reception side. Thereafter, the transmitting side intermittently transmits a transmission radio wave with the call holding time being silence, and the receiving side receiving the hold data intermittently receives the reception radio wave with the call holding time being silence. A transmission / reception control method for a wireless telephone system. 5. A transmission / reception control method for a wireless telephone system which detects presence / absence of voice and intermittently transmits a transmission radio wave when there is no sound. When a call is put on hold at a transmission side, hold data is transmitted from the transmission side to a reception side. A receiving side that receives the hold data, generates a hold tone when the call is held, and outputs the hold tone from the receiver. 6. In a transmission / reception control method of a wireless telephone system for detecting presence or absence of voice and intermittently transmitting a transmission radio wave when there is no sound, when a call is put on hold at a transmission side, the hold data is transmitted from the transmission side to a reception side. A receiving side receiving the hold data, generating a hold tone during the call holding, and transmitting the hold tone to the transmitting side.