JP2885779B1 - Wireless telephone and unwanted call disconnection method - Google Patents

Abstract

A wireless telephone capable of smartly cutting a nuisance call without excessively stimulating its caller is provided. SOLUTION: There is provided a keypad 103 for a user to perform a key input operation, and a wireless transmitting / receiving circuit 102 for wirelessly transmitting a transmission signal. The wireless telephone 100 disconnects the call when a received signal including noise of a level equal to or higher than a predetermined threshold value continues for a predetermined time during a call. A noise generation circuit for generating noise equal to or higher than a predetermined threshold value by pressing a key 103a of the keypad 103; and a noise insertion circuit for inserting noise generated by the noise generation circuit into a transmission signal 109
And

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone applied to a radio telephone system such as a PHS, and more particularly to a radio telephone capable of smartly cutting a nuisance call without excessively stimulating a caller.

[0002]

2. Description of the Related Art Until now, various countermeasures against unwanted calls such as mischievous telephones have been disclosed and implemented. For example,
JP-A-4-119747 and JP-A-7-27386
No. 4 also discloses some countermeasures.

[0003] In the wireless telephone system, PH
S uses a relatively high frequency band, and its speech quality is as high as that of a general wired telephone system. On the other hand,
Received electric field strength may decrease, or the error rate during a call (FER)
= Frame error rate), and if it continues for a period of time, the call is disconnected.

[0004]

In the conventional countermeasures for undesired calls, including the example described in the above-mentioned gazette, the caller of the undesired call is forced to hang up the call, or the called party himself or herself Will be cut. The former has a low effect on the purpose of cutting off unwanted calls as soon as possible because it depends on the caller. The latter has a high effect on the purpose.

[0005] However, if the called party hangs up the call, there is a possibility that the caller of the nuisance call may be excessively stimulated, and this may cause a further problem of recalling the nuisance call.

[0006] It is an object of the present invention to provide a wireless telephone and a method for disconnecting a nuisance call that can smartly disconnect a nuisance call without excessively stimulating the caller.

[0007]

According to the present invention, there is further provided a keypad for a user to perform a key input operation, and a wireless transmission circuit for wirelessly transmitting a transmission signal. If a received signal containing noise of a level equal to or higher than a predetermined threshold value during a call continues for a predetermined time or more, a radio telephone that disconnects the call will respond to a predetermined key input operation in response to a predetermined key input operation. A wireless telephone comprising a noise generation circuit for generating noise and a noise insertion circuit for inserting noise generated by the noise generation circuit into a transmission signal is obtained.

According to the present invention, there is further provided a keypad for a user to perform a key input operation, and a wireless transmission circuit for wirelessly transmitting a transmission signal. A wireless telephone for disconnecting a call when a received signal including noise continues for a predetermined time or more, comprising a threshold adjusting circuit for lowering the threshold in accordance with a predetermined key input operation. Is obtained.

Further, according to the present invention, when a received signal including noise having a level equal to or higher than a predetermined threshold value during a call continues for a predetermined time or more, the radio telephone disconnects the call.
A nuisance call disconnection method is provided, comprising the steps of: preparing a wireless telephone capable of transmitting the noise; and transmitting a transmission signal containing the noise from the wireless telephone during a call for a predetermined time or more.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a wireless telephone and a nuisance call cutting method according to an embodiment of the present invention;

[First Embodiment] A wireless telephone according to a first embodiment of the present invention is applied to a PHS as a wireless telephone system, and includes noise having a level higher than a predetermined threshold during a call. If the received signal continues for a predetermined time or more, the call is disconnected.

Referring to FIG. 1, a radio telephone 100 includes a central control circuit 101 for comprehensively controlling the operation of the radio telephone 100, a radio transmission / reception circuit 102 for transmitting / receiving radio signals via an antenna 107, and a user. A keypad 103 for performing a key input operation, a microphone 104 for a user to input voice, a speaker 105 for outputting a voice to the user, and a notification of an operation state of the wireless telephone 100 to the user. Display 10 such as a liquid crystal panel
6 and a battery (not shown) as a power source of the wireless telephone 100. The keypad 103 has predetermined key buttons.

Further, the radiotelephone 100 includes a noise generation circuit 108 for generating noise equal to or higher than a predetermined threshold value in response to a key input operation with the predetermined key button, and a noise generation circuit 108 for generating noise. A noise insertion circuit 109 inserted into the transmission signal.

The noise insertion circuit 109 inserts the noise generated by the noise generation circuit 108 into a transmission signal over a predetermined time by one key input operation. Note that the noise insertion circuit 109 may insert the noise generated by the noise generation circuit 108 into the transmission signal only while the predetermined key is pressed as a key input operation.

Next, a method of disconnecting unwanted calls using the wireless telephone 100 will be described.

With reference to FIG.
Use 00 to make a call to wireless telephone 100.

The operator of the wireless telephone 100 answers,
It is assumed that the call from the wireless telephone 500 is an annoying call.

The operator of wireless telephone 100 presses key 103a of keypad 103.

Referring to FIG. 1, when key 103a is pressed, noise generation circuit 108 generates a predetermined level of noise. The noise insertion circuit 109 inserts the noise generated by the noise generation circuit 108 into the transmission signal over a predetermined time.

Referring again to FIG. 2, while noise is being inserted, noise also appears in the voice of radio telephones 100 and 500, and the user of radio telephone 500 thinks that the radio wave condition is poor.

When a predetermined level of noise is included in the speech signal and continues for a predetermined time or longer, the radio telephones 100 and 500 or the base station of the PHS (not shown) cuts off the communication between the radio telephones 100 and 500. .

As described above, the annoying call was disconnected. Since the user of the wireless telephone 500 that was sending the nuisance call heard noise before the call was disconnected, it is considered that the radio wave condition was poor and the user was disconnected.

[Second Embodiment] A wireless telephone according to a second embodiment of the present invention is applied to a PHS as a wireless telephone system similarly to the first embodiment, and has a predetermined threshold during a call. If a received signal containing noise of a level higher than the value continues for a predetermined time or more, the call is disconnected.

Referring to FIG. 3, wireless telephone 200 has a central control circuit 101 for comprehensively controlling the operation of wireless telephone 200 and a wireless telephone for transmitting and receiving signals via antenna 107, similarly to the first embodiment. Transmitting / receiving circuit 102
And a keypad 10 for a user to perform a key input operation.
3, a microphone 104 for the user to input voice,
It has a speaker 105 for outputting sound to the user, a display 106 such as a liquid crystal panel for notifying the user of the operation state of the wireless telephone 100, and a battery (not shown) as a power supply for the wireless telephone 200. doing. The keypad 103 has predetermined key buttons.

Further, the radio telephone 200 has a threshold value adjusting circuit 201 for lowering the threshold value while the predetermined key is being pressed.

Incidentally, the threshold value adjusting circuit 201 may decrease the threshold value over a predetermined time or more by one key input operation.

Alternatively, the threshold value adjusting circuit 201 may gradually decrease the threshold value by one key input operation.

Next, a method of disconnecting unwanted calls using the wireless telephone 200 will be described.

With reference to FIG.
Use 00 to make a call to wireless telephone 100. The operator of the wireless telephone 100 answers, but the wireless telephone 500
The call from is a nuisance call.

The operator of wireless telephone 100 presses key 103a of keypad 103.

Referring to FIG. 3, when key 103a is pressed, threshold value adjusting circuit 201 lowers the threshold value. As a result, the noise level apparently drops even if the noise is normally within the allowable range.

If noise at a level higher than the threshold is included in the speech signal and continues for a predetermined time or longer, the radio telephones 100 and 500 or the base station of the PHS (not shown) transmits
00 is disconnected.

As described above, the nuisance call was disconnected.

[Third Embodiment] A wireless telephone according to a third embodiment of the present invention has many configurations similar to those of the second embodiment. However, the threshold value adjusting circuit increases the threshold value according to a specific key input operation.

As a result, the operator of the wireless telephone can arbitrarily raise the threshold to some extent, so that the noise level is apparently reduced and the communicable range is expanded.

However, it is not preferable to apply the wireless telephone according to the third embodiment and the wireless telephone according to the first or second embodiment to the same wireless telephone system for the purpose of disconnecting unwanted calls.

[0037]

The wireless telephone according to the present invention has a keypad for a user to perform a key input operation, and a wireless transmission circuit for wirelessly transmitting a transmission signal. When the received signal including the noise of the level continues for a predetermined time or more, in the wireless telephone that disconnects the call,
Since it has a noise generation circuit that generates noise equal to or higher than a predetermined threshold value in accordance with a predetermined key input operation, and a noise insertion circuit that inserts noise generated by the noise generation circuit into a transmission signal, Unwanted calls can be smartly cut without excessively stimulating the caller.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a wireless telephone according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the wireless telephone according to the present invention and the name call disconnection method according to the present invention.

FIG. 3 is a block diagram showing a wireless telephone according to a second embodiment of the present invention.

[Explanation of symbols]

 100, 200 Radiotelephone 101 Central control circuit 107 Antenna 102 Wireless transmission / reception circuit 103 Keypad 103a Key 104 Microphone 105 Speaker 106 Display 107 Antenna 108 Noise generation circuit 109 Noise insertion circuit 201 Threshold adjustment circuit

Claims (10)

(57) [Claims] 1. A reception signal including a keypad for a user to perform a key input operation, and a wireless transmission circuit for wirelessly transmitting a transmission signal, wherein the reception signal includes noise of a level equal to or higher than a predetermined threshold during a call. Continues for a predetermined time or more, in a wireless telephone that disconnects the call, a noise generating circuit that generates noise equal to or higher than the predetermined threshold value in response to a predetermined key input operation, and a noise generated by the noise generating circuit. And a noise insertion circuit for inserting a signal into a transmission signal. 2. The noise insertion circuit according to claim 1, wherein the noise insertion circuit inserts the noise generated by the noise generation circuit into the transmission signal so as to extend over the predetermined time by one key input operation. Wireless phone. 3. The noise insertion circuit according to claim 1, wherein the noise generated by the noise generation circuit is inserted into a transmission signal only while a predetermined key is pressed as a key input operation. Wireless phone. 4. A reception signal including a keypad for a user to perform a key input operation and a wireless transmission circuit for wirelessly transmitting a transmission signal, wherein the reception signal includes noise of a level equal to or higher than a predetermined threshold during a call. A threshold value adjusting circuit for lowering the threshold value in response to a predetermined key input operation in a wireless telephone which disconnects the telephone call when a predetermined time has elapsed. 5. The wireless telephone according to claim 4, wherein the threshold value adjusting circuit decreases the threshold value only while a predetermined key is pressed as a key input operation. 6. The radio telephone according to claim 4, wherein said threshold value adjusting circuit lowers said threshold value for a predetermined time or more by one key input operation. 7. The wireless telephone according to claim 4, wherein said threshold value adjusting circuit gradually lowers said threshold value by one key input operation. 8. The wireless telephone according to claim 4, wherein said threshold value adjusting circuit increases said threshold value in response to a second key input operation. 9. The wireless telephone according to claim 1, wherein the wireless telephone is for a PHS. 10. A step of preparing a radio telephone capable of transmitting said noise as a radio telephone for cutting off a call when a reception signal including noise of a level equal to or higher than a predetermined threshold continues for a predetermined time during a call. And transmitting a transmission signal containing the noise from the wireless telephone during a call for a predetermined time or more.