JPH0775164A - Mobile telephone set and telephone set control method - Google Patents

Abstract

PURPOSE:To prevent the mobile telephone set such as a car telephone set from being illegally used. CONSTITUTION:The mobile telephone set is provided with a use propriety deciding unit 19 for detecting a use inhibit code from a data signal provided by demodulating a received signal from a base station, ID deleting unit 20 for deleting ID information stored in an IDROM 21 when the use inhibit code is detected, and function recovery disabling unit 22 for disabling recovery by stopping the telephone function when the use inhibit code is detected. Thus, concerning the illegally used mobile telephone set, the ID information is deleted, and the telephone function is stopped and can not be recovered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone system for making a wireless call using a mobile telephone such as a car telephone, and more particularly to a mobile telephone and a telephone control method for realizing a security function against unauthorized use of the mobile telephone. It is a thing.

[0002]

2. Description of the Related Art FIG. 6 is a flow chart showing the processing of a conventional wireless telephone system by ID information collation. In FIG. 6, 1 is a mobile telephone connected to the base station by a wireless line, 2 is a base station connected by a wired telephone line, 3 is ID information transmitted from the mobile phone 1 to the base station 2, and 5 is Transmission processing in the mobile telephone 1, 6 reception processing in the base station 2,
Reference numeral 7 is an ID (identification) information collating process in the base station 2.

Next, the operation will be described. At the start of communication, the mobile phone 1 transmits the transmission process 5 to the I unique to the mobile phone.
The D information 3 is transmitted to the base station 2. On the other hand, the base station 2 receives the I transmitted from the mobile telephone 1 in the reception processing 6 on the base station side.
D information 3 is received. Further, the ID information 3 received in the ID information matching process 7 is compared with the ID information registered on the system side, and when the two match and it is determined that the mobile telephone 1 is the correct mobile telephone to be used, communication is continued. , If not, communication is stopped. When the communication is stopped, the transmission from the base station 2 to the mobile phone 1 is not performed.

[0004]

However, as in the above-mentioned conventional example, if the system side (base station) only collates the ID information and determines whether or not communication is possible, the illegally used mobile telephone itself becomes a mobile telephone. Since the function remains the same, there is a problem that it can be used by setting the ID information of another mobile phone. Further, there is a possibility that the ID information may be analyzed, and the mobile phone may be illegally used due to the analysis of the ID information.

The present invention has been made to solve the above problems, and a mobile telephone and a telephone that prevent the mobile telephone determined to be illegally used from stopping its function as a mobile telephone and not returning again. The purpose is to provide a control method.

[0006]

In the telephone control method of the first invention, the mobile telephone 1 transmits the ID information 3 peculiar to the telephone to the base station 2, and the base station 2 transmits the I information.
The availability of the mobile telephone 1 is determined based on the D information 3, and the availability code 4 is transmitted to the mobile telephone 1. The mobile telephone 1 determines availability based on the availability code 4 and prohibits the use. In this case, the telephone function is stopped.

In the telephone control method of the second invention,
The base station 2 stores the prohibited mobile phone ID information 14 for registering and identifying a specific mobile phone as a prohibited mobile phone.
Registered in the mobile phone 1 and the unique ID information 3 transmitted from the mobile phone 1 and the prohibited mobile phone ID.
The information 14 is collated. If the two are different, the use permission code 10 is sent. If the two are the same, the use prohibition code 11 is sent from the base station 2 to the mobile telephone 1, and the use prohibition code 10 is received. The mobile telephone 1 corresponds to the above-mentioned specific mobile telephone, and has its telephone function stopped.

The mobile electric machine according to the third aspect of the present invention comprises a usability judging device 19 for detecting a use prohibition code from a data signal 18 obtained by demodulating a received signal from a base station, and a usability judging device 19 I when a prohibited code is detected
ID for erasing ID information stored in DROM 21
And an eraser 20.

The mobile telephone according to the fourth aspect of the present invention is used by the usability judging device 19 for detecting the use prohibition code from the data signal obtained by demodulating the received signal from the base station, and the usability judging device 19. ID when the prohibition code is detected
An ID erasure device 20 for erasing the ID information stored in the ROM 21 and a function non-recovery device 22 for stopping the telephone function and making it impossible to recover again when the use prohibition code is detected. is there.

According to the telephone control method of the fifth aspect of the invention, when the use prohibition code is detected from the data signal obtained by demodulating the received signal from the base station, the ID information is erased and the telephone function is stopped. The mobile phone is provided with software for processing to make the recovery impossible.

[0011]

In the first invention, the base station 2 is the mobile telephone 1
The ID information 3 from the mobile phone 1 is received and the usability code 4 is transmitted to the mobile phone 1. The mobile phone 1 determines the availability based on the availability code 4, and if the usage is prohibited, stops the telephone function.

In the second aspect of the invention, when the base station 2 receives the ID information 3 from a specific prohibited mobile phone, the ID information 3 is used as the prohibited mobile phone ID information 14.
Therefore, the prohibition code 11 is sent to the specific mobile phone. As a result, the telephone function of the specific mobile telephone is stopped.

In the third invention, the usability judging device 19
Detects the use prohibition code from the data signal 18 obtained by demodulating the received signal, and the ID eraser 20 erases the ID information stored in the IDROM 21 when the use prohibition code is detected.

In the fourth invention, the usability judging device 19
Detects the prohibition code from the data signal 18 obtained by demodulating the received signal, and the ID eraser 20 erases the ID information stored in the IDROM 21 when the prohibition code is detected, and The non-recoverable device 22 suspends the telephone function when the use prohibition code is detected, and makes it impossible to recover again.

In the fifth aspect of the invention, when the use prohibition code is detected from the data signal obtained by demodulating the received signal from the base station, the ID information is erased, the telephone function is stopped, and the mobile telephone. Will not be able to return.

[0016]

Embodiment 1 Embodiment 1 (corresponding to claim 1). Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a mobile telephone, 2 is a base station, 3 is ID information transmitted from the mobile telephone 1 to the base station 2, and 4 is a usability code transmitted from the base station 2 to the mobile telephone 1.

Next, the operation will be described. Mobile phone 1
Transmits ID information 3 to the base station 2, and the base station 2 determines whether or not the mobile telephone 1 can be used based on this ID information 3 and transmits a usability code 4 to the mobile telephone 1. The mobile telephone 1 judges the usability based on the usability code 4, and when the use is prohibited, the function is stopped.

Embodiment 2 (corresponding to claim 2). Embodiment 2 of the present invention will be described below with reference to the drawings. In FIG. 2, 1 is a mobile telephone, 2 is a base station, 3 is ID information transmitted from the mobile telephone 1 to the base station 2, 5 is transmission processing in the mobile telephone 1, 6 is reception processing in the base station 2, 7 is an ID in the base station 2
Information collation processing, 8 is a use permission code transmission processing in the base station 2, 9 is a use prohibition code transmission processing in the base station 2, 10 is a use permission code transmitted from the base station 2 to the mobile telephone 1, 11 is a base A use prohibition code transmitted from the station 2 to the mobile phone 1, 12 is a reception process in the mobile phone 1, 13 is a usability determination process in the mobile phone 1, and 14 is a use prohibited mobile phone registered in the base station 2. This is ID information.

Next, the operation will be described. Mobile phone 1
Transmits the ID information 3 peculiar to the mobile telephone to the base station 2 in the transmission processing 5. On the other hand, the base station 2 receives the ID information 3 transmitted from the mobile phone 1 in the reception process 6. Further, the ID information 3 received in the ID information collation processing 7 and the use prohibited mobile phone I registered on the system side (base station 2)
The D information 14 is collated. Unusable mobile phones registered in the system are mobile phones that have not been used by the user, unused mobile phones, mobile phones that have exceeded the expiration date, mobile phones that have exceeded the effective usage charge, and mobile phones that have exceeded the effective usage time. Is. As a result of ID information collation, mobile phone 1
If it is determined that the mobile phone is a use-permitted mobile phone, the base station 2 transmits the use-permission code 10 to the mobile phone 1 by the use-permission-code transmission process 8 and continues the normal operation. When it is determined that the mobile phone 1 is a use-prohibited mobile phone, the base station 2 transmits the use-prohibition code 11 to the mobile phone 1 by the use-prohibition code transmission process 9 and stops the communication. As a result, the mobile phone 1 receives the use permission code 10 or the use prohibition code 11 in the reception process 12, and determines whether or not the mobile phone itself can be used in the use permission / inhibition determination process 13. The mobile phone 1 that is determined to be permitted to use continues to operate normally, but the mobile phone 1 that is determined to be prohibited from use stops its telephone function and is prohibited from use.

Embodiment 3 (corresponding to claim 3). FIG. 3 is a block diagram showing a configuration of the third embodiment in which the mobile telephone 1 according to the second embodiment is provided with an ID information erasing means for erasing the ID information when it is determined that the use is prohibited. In FIG. 3, 15
Is a received signal from the base station, 16 is a demodulator for demodulating the received signal 15, 17 is the demodulated voice signal, 18 is the demodulated data signal, and 19 is for determining whether or not the mobile phone can be used. A usability judging unit as a propriety judging unit, 20 is an ID erasing unit as the ID information erasing unit,
Reference numeral 21 is an IDROM as a storage means for storing ID information.
Is.

Next, the operation will be described. Received signal 1
5 is demodulated by the demodulator 16 to obtain a voice signal 17 and a data signal 18. The data signal 18 thus obtained is passed through a usability judging device 19 to detect a use prohibition code. If the prohibition code is detected here, the ID eraser 20
The ID information stored in the IDROM 21 is erased by.

Embodiment 4 (corresponding to claim 4). FIG. 4 is a block diagram showing the configuration of the fourth embodiment in which the mobile telephone 1 according to the third embodiment is provided with a function re-restoration means that makes it impossible to re-restor the telephone function when it is determined that the use is prohibited. Figure 4
In the figure, 15 is a received signal, 16 is a demodulator, 17 is a voice signal, 18 is a data signal, 19 is a usability judging device, 20
Is an ID eraser, 21 is an ID ROM, and 22 is a function re-restoration device as the function re-restoration means.

Next, the operation will be described. Received signal 1
5 is demodulated by the demodulator 16 to obtain a voice signal 17 and a data signal 18. The data signal 18 thus obtained is passed through a usability judging device 19 to detect a use prohibition code. If the prohibition code is detected here, the ID eraser 20
The ID information set in the ID ROM 21 is erased, and the telephone function is stopped by the function re-restoration device 22 so that the mobile telephone cannot be re-restored.

Embodiment 5 (corresponding to claim 5). In the fifth embodiment, each means of the mobile telephone 1 of the third and fourth embodiments is realized by software processing. The flowchart is shown in FIG. In FIG. 5, the use prohibition code 23 is used to detect the use prohibition code from the data signal obtained by demodulating the received signal from the base station. If the use permission code is detected, normal operation is performed. When the use prohibition code is detected, the mobile phone concerned erases the ID information as an illegally used telephone in the ID erasure processing 24. Then, the telephone function is stopped by the function stop processing 25,
Subsequently, the function re-restoration impossible processing 26 is performed so that the mobile telephone cannot be restored again.

[0025]

As described above, according to the first aspect of the invention, the mobile telephone transmits the identification information unique to the telephone to the base station, and the base station can use the mobile telephone based on the identification information. The mobile phone determines whether or not the mobile phone can be used based on the above-mentioned usability code and stops the telephone function when the use is prohibited. As a result, the telephone function of the mobile telephone is stopped, and the effect of preventing unauthorized use of the mobile telephone can be obtained.

According to the second aspect of the invention, the prohibited mobile phone identification information for registering and identifying a specific mobile phone as a prohibited mobile phone is registered in the base station and transmitted from the mobile phone. Collate the identification information unique to the phone with the identification information of the prohibited mobile phone,
When the two are different, a use permission code is sent, and when the two are the same, a use prohibition code is sent from the base station to the mobile phone, and the mobile phone receiving the use prohibition code corresponds to the specific mobile phone. Since the phone function is stopped, it is possible to register a specific mobile phone as a prohibited phone, and even if this specific mobile phone is used, the phone function will stop. The effect that it can be prevented is obtained.

According to the third aspect of the invention, the usability determining means for detecting the usability code from the data signal obtained by demodulating the received signal from the base station, and the usability determining means for inhibiting the use. Since the mobile phone is provided with the identification information erasing means for erasing the identification information stored in the storage means when the code is detected, the identification information of the illegally used mobile telephone is erased, and therefore the identification information is deleted. Cannot be deciphered, and the effect of preventing unauthorized use of the mobile phone can be obtained.

According to the fourth aspect of the invention, the usability determining means for detecting the usability code from the data signal obtained by demodulating the received signal from the base station, and the usability determining means for prohibiting the use. Identification information erasing means for erasing the identification information stored in the storage means when a code is detected, and function re-restoration for stopping the telephone function and making it impossible to recover again when the use prohibition code is detected Since the means is provided in the mobile telephone, the identification information of the illegally used mobile telephone is erased and unreadable, and the telephone function is stopped and it cannot be restored again, thus preventing the illegal use of the mobile telephone. The effect of being able to be obtained is obtained.

According to the fifth aspect of the invention, the identification information is erased when the use prohibition code is detected from the data signal obtained by demodulating the received signal from the base station.
Since the mobile telephone is provided with software for performing processing for stopping the telephone function and making it impossible to recover again, the hardware can be reduced and the same effect as the fourth invention can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart of ID verification according to the second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a flow chart showing a fifth embodiment of the present invention.

FIG. 6 is a flowchart showing ID verification of a conventional mobile phone.

[Explanation of symbols]

 1 Mobile Phone 2 Base Station 3 ID Information 4 Usability Code 5 Mobile Station Side Transmission Process 6 Base Station Side Reception Process 7 ID Information Matching Process 8 Use Permit Code Transmission Process 9 Use Prohibition Code Transmission Process 10 Use Permit Code 11 Use Prohibition Code 12 Mobile device side reception processing 13 Usability judgment processing 14 Use prohibited mobile telephone ID information 15 Received signal 16 Demodulator 17 Voice signal 18 Data signal 19 Usability judgment device 20 ID eraser 21 IDROM 22 Function non-recoverable device 23 Usability Judgment processing 24 ID deletion processing 25 Function stop processing 26 Function re-restoration impossible processing

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[Procedure amendment]

[Submission date] November 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

In the second aspect of the invention, when the base station 2 receives the ID information 3 from a specific prohibited mobile phone, the ID information 3 is used as the prohibited mobile phone ID information 14.
Therefore, the prohibition code 11 is sent to the specific mobile phone. As a result, the telephone function of the specific mobile telephone is stopped.

Claims (5)

[Claims] 1. A radio telephone system comprising a base station connected to a wired telephone line and a mobile telephone connected to this base station by a radio line, wherein the mobile telephone identifies the base station uniquely to the telephone. The information is transmitted, the base station determines whether or not the mobile phone can be used based on the identification information, and transmits the usability code to the mobile phone, and the mobile phone determines whether or not the mobile phone is available based on the usability code. A telephone control method characterized in that the telephone function is stopped when it is determined that the use is prohibited. 2. In a wireless telephone system comprising a base station connected to a wired telephone line and a mobile telephone connected to this base station by a wireless line, a specific mobile telephone is registered as a prohibited mobile telephone. If the identification information of the prohibited mobile phone for identification is registered in the base station and the identification information unique to the telephone transmitted from the mobile phone is collated with the identification information of the prohibited mobile phone, if both are different Sends a license code to the mobile phone from the base station when the two match, and the mobile phone that receives the use disable code corresponds to the specific mobile phone and has its phone function. A telephone control method characterized in that the telephone is stopped. 3. A wireless telephone system comprising a base station connected to a wired telephone line and a mobile telephone connected to this base station by a wireless line, and obtained by demodulating a received signal from the base station. A usability judging means for detecting the prohibition code from the received data signal, and an identification information erasing means for erasing the identification information stored in the storage means when the prohibition code is detected by the usability judging means. A mobile telephone characterized by being provided with. 4. A radio telephone system comprising a base station connected to a wired telephone line and a mobile telephone connected to this base station by a radio line, and obtained by demodulating a received signal from the base station. A usability judging means for detecting the prohibition code from the received data signal, and an identification information erasing means for erasing the identification information stored in the storage means when the prohibition code is detected by the usability judging means. A mobile telephone comprising: a function re-restoration means that suspends the telephone function and disables re-restoration when the use prohibition code is detected. 5. A radio telephone system comprising a base station connected to a wired telephone line and a mobile telephone connected to this base station via a radio line, and obtained by demodulating a received signal from the base station. The mobile telephone is provided with software for erasing the identification information when the use prohibition code is detected from the received data signal, and for processing to stop the telephone function and make it impossible to restore again. Control method.