JP2002118877A - Method for erasing information of mobile terminal in mobile communication system, device for controlling erasure of mobile terminal information and mobile terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile terminal information erasing method capable of erasing information even if a mobile terminal is not brought to a communication provider in a mobile communication system, reusing information such as subscriber's information stored in the mobile terminal and protecting subscriber's privacy. SOLUTION: In the mobile terminal information erasing method for erasing information stored in a mobile terminal allowed to be connected to a mobile communication system capable of providing communication service to the mobile terminal registered as a subscriber in a network, the erasure of information stored in the mobile terminal is instructed through the network so that information stored in the mobile terminal can be erased based on the instruction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for erasing mobile terminal information in a mobile communication system, and more particularly, to a mobile communication system for providing communication services to mobile terminals registered in a network. The present invention relates to a mobile terminal information erasing method for erasing information stored in a mobile terminal that can be connected to the mobile terminal.

[0002] The present invention also relates to a mobile terminal information erasure control device for erasing information stored in a mobile terminal according to such a mobile terminal information erasing method.

Further, the present invention relates to a mobile terminal for erasing information stored according to such a mobile terminal information erasing method.

[0004]

2. Description of the Related Art Conventionally, for example, PDC (Personal Digit
al Cellular) mobile terminals used in mobile communication systems store subscriber numbers (telephone numbers), identification numbers of mobile devices, confidential information, information stored by subscribers, and the like.

[0005] Usually, when a subscriber who owns a mobile terminal cancels the contract, he loses the right to receive network services, but the user owns the ownership of the mobile terminal itself. Therefore, in order to delete the subscriber number (telephone number), the identification number of the mobile device, the confidential information and the information stored by the subscriber individually assigned to the user, the subscriber who has canceled the mobile terminal (hereinafter, referred to as (Called a former subscriber) brought the mobile terminal to a telecommunications carrier, and performed information erasure processing such as subscriber information using equipment owned by the telecommunications carrier.

[0006]

However, according to the above-mentioned method, if the former subscriber does not bring the canceled mobile terminal to the communication carrier, the subscriber number (telephone number) held by the mobile terminal, The identification number of the mobile device, confidential information, etc. cannot be deleted. Therefore, telecom carriers
Such information cannot be reused, and network resources may be depleted.

On the other hand, if the mobile terminal is lost, the connection can be stopped even if a malicious third party attempts to connect to the network using the lost mobile terminal, but the subscriber stores the information in the mobile terminal. The privacy of the subscriber may be infringed because the information that has been viewed can be viewed.

Accordingly, a first object of the present invention is to provide a mobile communication system in which information can be erased without bringing a mobile terminal to a communication carrier, and subscriber information stored and held by the mobile terminal. It is an object of the present invention to provide a mobile terminal information erasing method which can reuse information such as the above and protect the privacy of a subscriber.

A second object of the present invention is to provide a mobile terminal information erasure control device for erasing information according to such a mobile terminal information erasing method. Further, a third object of the present invention is to provide a mobile terminal capable of erasing information according to such a mobile terminal information erasing method.

[0010]

In order to solve the above first problem, the present invention provides a communication service for a mobile terminal registered in a network as a subscriber. In a mobile terminal information erasing method for erasing information stored in a mobile terminal connectable to a mobile communication system to be performed, instructing the mobile terminal to delete the stored information via a network, The mobile terminal is configured to delete stored information based on the instruction.

In such a mobile terminal information erasing method, the information stored in the mobile terminal is deleted based on an instruction from the network.

The above-mentioned instruction may be first issued from the network side to a mobile terminal not accessing the network, or the above-mentioned instruction may be issued to the mobile terminal when the mobile terminal accesses the network. You may do so. In the latter case, the present invention relates to claim 2
As described in the above, in the mobile terminal information erasing method, it is determined whether or not the mobile terminal that has accessed the network is the mobile terminal from which the stored information should be deleted, and the mobile terminal stores the information. When it is determined that the mobile terminal is the mobile terminal from which the deleted information is to be deleted, the mobile terminal may be instructed to delete the information via the network.

[0013] As the access to the network, a call request from the mobile terminal to the network as described in claim 3, a location registration request from the mobile terminal to the network as described in claim 4, or a claim to claim 5. It can be an incoming request from the network to the mobile terminal.

According to the present invention, in each of the mobile terminal information erasing methods, information stored in the mobile terminal based on whether or not the mobile terminal is registered as a subscriber in the network. May be determined to be a mobile terminal to be deleted.

According to such a mobile terminal information erasing method, it becomes possible to delete information of mobile terminals that have not been registered as a subscriber in the network.

[0016] In particular, from the viewpoint that network resources can be effectively used, the present invention provides a mobile terminal information erasing method according to the present invention, in which the subscription stored for the mobile terminal is stored. It can be configured to instruct erasure of user information.

In such a mobile terminal information erasing method, the subscriber information stored in the mobile terminal for which the subscriber registration has not been performed can be erased based on an instruction from the network side. Therefore, in the mobile communication system, the deleted subscriber information can be reused.

[0018] Further, according to the present invention, in each of the mobile terminal information erasing methods, the mobile terminal information erasing method is based on whether or not a subscriber is registered in the network with specific subscriber information. The mobile terminal may be configured to determine whether or not the stored information is to be deleted.

In such a mobile terminal information erasing method, it is possible to determine whether or not the mobile terminal is to be deleted based on the subscriber information (specific subscriber information) of the lost mobile terminal. .

In particular, from the viewpoint that the privacy of a user who has lost a mobile terminal or the like can be protected, the present invention provides a mobile terminal information erasing method, comprising: It can be configured to instruct erasure of the personal information stored in advance.

In such a mobile terminal information erasing method, personal information stored in a mobile terminal registered as a subscriber based on subscriber information (specific subscriber information) of a lost mobile terminal is instructed from the network side. Can be erased based on the

The personal information is information stored in the mobile terminal based on a user's operation, and is information such as a telephone directory, an address book, received mail, and received content.

In order to solve the second problem, the present invention provides a mobile communication system for providing a communication service to mobile terminals registered in a network as described in claim 10. A mobile terminal information erasure control device for erasing information stored in a mobile terminal connectable to the mobile terminal, the device having erasure instruction means for instructing erasure of the stored information to the mobile terminal via a network, The information stored in the mobile terminal is erased based on an instruction issued by the erasure instruction means.

[0024] In order to solve the third problem, the present invention provides a mobile communication system in which a communication service is provided to a mobile terminal registered as a subscriber in a network. A mobile terminal connectable to the system is configured to include information erasing means for erasing stored information when a predetermined instruction is received via a network.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

A mobile communication system to which the mobile terminal information erasing method according to one embodiment of the present invention is applied is configured, for example, as shown in FIG.

Referring to FIG. 1, the mobile communication system includes:
For example, it is a PDC (Personal Digital Cellular) system, and includes a mobile terminal 10, a base station 20, a network device 30 (for example, an exchange), and a subscriber data server 4.
0 and a control device 41. The mobile terminal 10 performs wireless communication with the base station 20, and the exchange 30 and the subscriber data server 40 perform control such as calling, receiving, and location registration from the mobile terminal 10.

The subscriber data server 40 stores subscriber numbers (telephone numbers), identification numbers of mobile terminals, confidential information, and the like. For example, in the case of performing communication between mobile terminals, the exchange 30 accesses the subscriber data server 40 to acquire the subscriber information necessary for performing the communication. Used to establish a connection between terminals.

The subscriber data server 40 is operated and maintained by the control device 41. The subscriber data server 40 can be connected to the exchange 30 or another node and operated, or can be operated in a stand-alone mode. You can also.

The mobile terminal 10 is configured as follows.

As shown in FIG. 2, for example, the mobile terminal 10 includes a transmission / reception unit 11, a transmission / reception signal processing unit 12, an audio signal processing unit 13, a control unit (CPU) 14, and a storage unit (memory).
15, a handset 16 and a display / operation unit 17.

The transmission / reception section 11 transmits and receives voice signals and data to and from the base station 20. The transmitting / receiving unit 11 performs frequency conversion and demodulation processing of the received wireless signal. The transmission / reception signal processing unit 12 performs a process of allocating various data (eg, audio signals) received by the transmission / reception unit 11 to a predetermined frame format. The audio signal processing unit 13
The audio signal transmitted from the transmission / reception signal processing unit 12 is processed according to a predetermined algorithm (eg, decoding processing). The audio signal processed by the audio signal processing unit 13 is supplied to the handset 16 and output as audio.

On the other hand, the user's voice fetched from the handset 16 is input to the voice signal processing unit 13 and subjected to processing (eg, code processing) according to a predetermined algorithm. The audio signal processed by the audio signal processing unit 13 is supplied to the transmission / reception signal processing unit 12, converted into a predetermined frame format, and then supplied to the transmission / reception unit 11. And
The transmission and reception unit 11 performs modulation and frequency conversion processing, and transmits a radio signal to the base station 20.

The data processed by the transmission / reception signal processing unit 12 is supplied to the control unit 14. The storage unit 15
Programs to be executed by the control unit 14, various kinds of received data,
And personal information of the user, for example, a telephone address book, schedule management information, and other necessary data. The display / operation unit 17 has a display panel for displaying various information and an operation panel (such as a numeric keypad) for inputting various information.

The control section 14 displays information on the display panel of the display / operation section 17 based on the data processed by the transmission / reception signal processing section 12 or receives an operation signal from the operation panel of the display / operation section 17. The processing based on this is executed.

Normally, when the user owning the mobile terminal 10 loses or stolen the mobile terminal 10, the user informs the communication carrier of the reason. Upon receiving the communication from the user, the communication carrier performs a process for preventing a malicious third party from finding the mobile terminal 10 and connecting to the network.

When the user of the mobile terminal 10 performs a cancellation procedure with the telecommunications carrier, the telecommunications carrier makes the mobile terminal 1
The processing for stopping the connection to the network is performed for 0. Accordingly, the mobile terminal 10 under the above-mentioned situation is the mobile terminal 10 in which the user (subscriber) has lost or the like, or the mobile terminal 10 not having the right to receive the network service.

Information such as subscriber information in the mobile terminal 10 lost or the like by the user (subscriber) or the mobile terminal 10 not having the right to receive network service (hereinafter referred to as a non-subscriber mobile terminal) is stored. The first example of erasing is performed according to the procedure shown in FIG.

In FIG. 3, the mobile terminal 10 (power ON state) transmits an outgoing call request signal (a) to the exchange 30 to set up a call with the destination terminal via the network. . In the exchange 30, the transmission request signal (a)
Is received, the mobile terminal 10 notifies the subscriber data server 40 of the occurrence of the call request by the subscriber information notification signal (b). This subscriber information notification signal (b)
It is composed of a unique identification number (machine number) of a mobile terminal, a telephone number of a subscriber, secret information, and the like. Note that the identification number of the mobile terminal 10 is used when a communication carrier performs a connection process with a destination terminal based on a connection request from the mobile terminal 10. Usually, this identification number is managed by a communication carrier.

When the subscriber data server 40 receives the subscriber information notification signal (b), the non-subscriber mobile terminal 1
It is determined (c) whether the signal is a transmission request signal (a) from the mobile terminal 10 of a user who has lost the mobile terminal 10 (hereinafter referred to as a user who needs information erasure as necessary).
If the call request signal is from a non-subscriber or an authorized user who is not a user who needs information erasure (NO in c), information necessary for normal line connection processing (d) is read from the subscriber data server 40 and exchanged. A connection is established between the station 30 and the mobile station, and communication such as voice communication can be performed.

On the other hand, if it is not a call request signal from an authorized user (YES in c), that is, if it is a call request signal (a) from a non-subscriber mobile terminal 10 or a mobile terminal 10 of a user who needs information erasure, , The subscriber data server 40 notifies the exchange 30 of the subscriber information erasure command signal (e). The subscriber information erasure command signal (e) has a command for erasing either the subscriber information stored in the mobile terminal 10 and / or the information registered by the subscriber.

The determination processing (c) performed by the subscriber data server 40 is performed by the subscriber information stored in the memory of the subscriber data server 40 and the subscription of the mobile terminal 10 that has transmitted the transmission request signal (a). The mobile terminal 10 makes an inquiry to the mobile terminal 10 to determine whether or not the mobile terminal 10 is a non-subscriber. Also, the subscriber data server 40
, Subscriber information about the mobile terminal 10 of the user who needs information erasure is notified by the communication carrier. Then, the subscriber information of the mobile terminal 10 identified as the subscriber is further collated with the reported subscriber information, and the mobile terminal 10 transmitting the transmission request signal (a) based on the collation result. Is for the person who needs information erasure.

The exchange 30 that has received the subscriber information erasure command signal (e) transmits a subscriber information erasure signal (f) to the non-subscriber mobile terminal 10. The mobile terminal 1 that has received the subscriber information erasure signal (f) via the wireless section
0 performs the erasing process (g) of the information stored in the storage unit 15 of the mobile terminal 10 in accordance with the content specified in the subscriber information erasing signal (f), and if the erasing process ends normally, The exchange 30 is notified of the subscriber information erasure completion signal (h). Here, the content specified by the subscriber information erasure signal (f) is the same as the content specified by the subscriber information erasure command signal (e).

Upon receiving the subscriber information erasure completion signal (h), the exchange 30 notifies the subscriber data server 40 of a subscriber information erasure completion notification signal (i). And
The subscriber data server 40 notified of the subscriber information erasure completion notification signal (i) stores that the information erasure process of the mobile terminal 10 is completed, and stores a series of the mobile terminal 10.
Is completed.

In such a mobile terminal information erasing method in the mobile terminal 10, an outgoing call request signal (a) transmitted when the telephone number of the other party is input from the mobile terminal 10 to connect to the network is transmitted to the mobile terminal 10. This is a trigger for deleting the subscriber information.

Therefore, according to the above-described mobile terminal information erasing method, a call is made from the mobile terminal 10 of a non-subscriber mobile terminal 10 or a user who has lost the mobile terminal 10 or the like, thereby automatically setting the mobile terminal 10. Can delete the subscriber information (including the personal information of the subscriber) stored by the user.

As a result, the telecommunications carrier can reassign the deleted subscriber information to other users, and can use network resources efficiently.

Further, it is possible to prevent the personal information of the subscriber from being lost when the mobile terminal 10 is lost.

The mobile terminal 10 of the person who needs information erasure, or
The second example of the process of erasing information such as subscriber information in the non-subscriber mobile terminal 10 is performed according to the procedure shown in FIG.

In FIG. 4, when the power of the mobile terminal 10 is turned on, a position registration request signal (a) is transmitted from the mobile terminal to the switching center in order to register the position information of the mobile terminal 10 in a location register in the network. 30. In the exchange 30, the location registration request signal (a)
Is received, the mobile station 10 notifies the subscriber data server 40 of the occurrence of the location registration request signal (a) by the subscriber information notification signal (b).

When the subscriber data server 40 receives the subscriber information notification signal (b), the non-subscriber mobile terminal 1
0 or a location registration request signal (a) from the mobile terminal 10 that requires information erasure (c), and determines whether it is a non-subscriber mobile terminal 10 or an authorized user who is not the mobile terminal 10 that requires information erasure. If it is a position registration request signal (NO in c), the normal connection processing (d), in this case, the position registration to the home location register is performed.

On the other hand, if it is not a position registration request from an authorized user (YES in c), that is, if it is a position registration request signal (a) from a non-subscriber mobile terminal 10 or a mobile terminal 10 requiring information erasure. , The subscriber data server 40 notifies the switching center 30 of the subscriber information erasure signal command signal (e).
The subscriber information erasure signal command signal (e) has a command to erase either one of the subscriber information stored in the mobile terminal 10 and the information registered by the subscriber, or one of them.

The determination process (c) performed in the subscriber data server 40 is performed in the same procedure as the determination process (c in FIG. 3) shown in FIG.

When the exchange 30 receives the subscriber information erasure command signal (e), the non-subscriber mobile terminal 10 or
A subscriber information erasure signal (f) is transmitted to the mobile terminal 10 that needs information erasure. Upon receiving the subscriber information erasure signal (f), the mobile terminal 10 performs an erasure process of the information stored in the storage unit 15 of the mobile terminal 10 in accordance with the content specified in the subscriber information erasure signal (f). When (g) is performed and the erasure processing is completed normally, the exchange 30 is notified of the completion (h) of the subscriber information erasure signal. Upon receiving the subscriber information erasure signal completion (h), the exchange 30 sends a subscriber information erasure signal completion notification (i) to the subscriber data server 40.
Notify.

In this way, the subscriber data server 40, which has been notified of the subscriber information erasure signal completion notification (i), stores that the erasure processing of the information of the mobile terminal 10 is completed, and a series of the mobile terminal 10 Then, the information erasing process for the device 10 is completed.

In the mobile terminal information erasing method in the mobile terminal 10 described above, the location registration request signal (a) transmitted when the mobile terminal 10 is turned on to connect to the network is transmitted to the subscriber of the mobile terminal 10. This is a trigger for deleting information.

Therefore, according to the above-mentioned mobile terminal information erasing method, the mobile terminal 10 is automatically transmitted by the location registration request signal (a) transmitted from the non-subscriber mobile terminal 10 or the mobile terminal 10 of the user who needs information erasure. Can delete the subscriber information (including the personal information of the subscriber) stored by the user.

As a result, the telecommunications carrier can reassign the deleted subscriber information to other users, and can use network resources efficiently.

Further, it is possible to prevent the personal information of the subscriber from being lost when the mobile terminal 10 is lost.

A third example of the process of erasing information such as subscriber information in the non-subscriber mobile terminal 10 or the mobile terminal 10 that needs to erase information is performed according to the procedure shown in FIG.

In FIG. 5, when the mobile terminal 10 in the standby state receives a call (a) from another user, it transmits a call response signal (b) to the exchange 30 as a response to the call (a). Upon receiving the call response signal (b), the exchange 30 notifies the subscriber data server 40 of the occurrence of the call response signal (b) by the subscriber information notification signal (c).

When the subscriber data server 40 receives the subscriber information notification signal (c), the non-subscriber mobile terminal 1
0 or a call response signal (b) from the mobile terminal 10 that requires information erasure (d), and determines from the non-subscriber mobile terminal 10 or an authorized user who is not the mobile terminal 10 that requires information erasure. If the call response signal is (b) (NO in d), a normal connection process (e) is performed, in this case, a line connection process with the destination user who received the call is performed.

On the other hand, if the call response signal is from a non-subscriber mobile terminal 10 or a mobile terminal 10 that needs to delete information (d
YES), the subscriber data server 40 notifies the switching center 30 of the subscriber information erasure command signal (f). The subscriber information erasure command signal (f) has a command to erase either one of the subscriber information in the mobile terminal 10 and the information registered by the subscriber.

The determination process (d) performed in the subscriber data server 40 is performed in the same procedure (c in FIG. 3 and c in FIG. D) as the determination process shown in FIG. 3 or FIG.

Upon receiving the subscriber information erasure command signal (f), the exchange 30 receives the non-subscriber mobile terminal 10 or
A subscriber information erasure signal (g) is transmitted to the mobile terminal 10 that needs information erasure. Upon receiving the subscriber information erasure signal (g), the mobile terminal 10 performs a process of erasing information stored in the storage unit 15 of the mobile terminal 10 in accordance with the content specified by the subscriber information erasure signal (g). When (h) is performed and the erasing process ends normally, the subscriber station erasure signal completion (i) is notified to the exchange 30. Upon receiving the subscriber information erasure signal completion (i), the exchange 30 sends a subscriber information erasure signal completion notification (j) to the subscriber data server 40.
Notify.

In this way, the subscriber data server 40 notified of the subscriber information erasure signal completion notification (j) stores that the erasure processing of the information of the mobile terminal 10 is completed, and stores a series of the mobile terminal 10. Then, the information erasing process for the device 10 is completed.

In the mobile terminal information erasing method in the mobile terminal 10 described above, the call response signal (b) transmitted when the mobile terminal 10 receives an incoming call is used to delete the subscriber information of the mobile terminal 10. It is a trigger.

Therefore, according to the above-mentioned mobile terminal information erasing method, the call response signal signal (b) transmitted from the non-subscriber mobile terminal 10 or the mobile terminal 10 of the user who needs information erasure.
Accordingly, the subscriber information (including the subscriber's personal information) stored in the storage unit 15 by the mobile terminal 10 can be automatically deleted.

As a result, the telecommunications carrier can reassign the deleted subscriber information to another user, and can use network resources efficiently. In addition, it is possible to prevent the personal information of the subscriber from being lost when the mobile terminal 10 is lost.

The subscriber data server 4 in the mobile terminal 10 of a non-subscriber or the mobile terminal 10 of a user who needs information erasure.
An example of the process of erasing information by directly controlling 0 is performed according to the procedure shown in FIG.

In this example, the subscriber information is erased in the mobile terminal 10 by using the subscriber information erasure request sent from the subscriber server 40 as a trigger.

The subscriber data server 40 exchanges a subscriber information erasure request signal (a) addressed to the mobile terminal 10 of a non-subscriber or the mobile terminal 10 of the information erasure requester requested by the information exchange. 30. At this time, the control device 41 which manages and controls the subscriber data server 40
, The subscriber information erasure request signal (a) can be transmitted to the exchange 30.

Upon receiving the subscriber information erasure request signal (a), the exchange 30 transmits a subscriber information erasure signal (b) to the mobile terminal 10. The mobile terminal 10
Receives the subscriber information erasure signal (b), performs the erasure process (c) of the stored information in accordance with the content specified in the subscriber information erasure signal (b), and terminates the erasure process normally. In this case, the exchange 30 is notified of the subscriber information erasure completion signal (d). Upon receiving the subscriber information erasure completion signal (d), the exchange 30 notifies the subscriber data server 40 of a subscriber information erasure completion notification signal (e). Then, the subscriber data server 40 notified of the subscriber information erasure completion notification signal (e) stores that the erasure process of the information of the mobile terminal 10 is completed, and performs a series of information erasure processes for the mobile terminal 10. Complete.

In such a mobile terminal information erasing method, when the mobile terminal 10 is under the control of a communication carrier, the subscriber information is directly deleted using the control device 41 for managing and controlling the subscriber data server 40. Therefore, by transmitting the subscriber information deletion command (a) to the mobile terminal 10, the information deletion processing can be performed.

The information erasing process (FIGS. 3g, 4g, 5h, and 6c) in the mobile terminal 10 in each of the above-described examples is performed, for example, according to the procedure shown in FIG.

In the mobile terminal 10, the subscriber data server 4
When receiving the subscriber information erasure signal (a) transmitted by the wireless communication unit 0 through the wireless section, the wireless signal is demodulated by the transmission / reception unit 11 and output to the transmission / reception signal processing unit 12. The transmission / reception signal processing unit 12 performs data processing of the demodulated signal and outputs the processed data to the control unit 14. When the control unit 14 extracts the subscriber information erasure signal (a) from the processed data, the control unit 14 analyzes the subscriber information erasure signal (a) and identifies the erasure information (b). Then, identification of the erase information (b)
If the result is the information registered by the subscriber (such as an address book d), an instruction to delete the information registered by the subscriber (g) is transmitted to the storage unit 15. If the identification result (b) is the subscriber information (c), an instruction to delete the subscriber information (f) is transmitted to the storage unit 15. Further, if the identification result (b) is the subscriber information and the information registered by the subscriber (e), an instruction to delete the subscriber information and the information registered by the subscriber (h) is transmitted to the storage unit 15.

Upon receiving the subscriber information erasure instructions (f to g), storage unit 15 receives the corresponding subscriber information stored in different areas according to the respective subscriber information erasure instructions (f to g). Perform erasure processing.

When the erasure processing of the subscriber information is completed in this way, the completion (i) of the subscriber information erasure signal is notified to the subscriber server 40, and a series of erasure processing is completed.

In the subscriber information erasure process performed by the mobile terminal 10, the corresponding information is erased according to the content of the subscriber information erasure signal (a) transmitted from the subscriber server 40. Therefore, when the user
After canceling, when the user owns the mobile terminal 10 and does not want to delete the personal information and the like stored by the user himself, the erasure processing (f) of only the subscriber information managed by the communication carrier is performed. , And the user loses the mobile terminal 10,
For example, when the user wants to prohibit the viewing of personal information stored in the mobile terminal 10, the user deletes the information registered by the subscriber (g). , If you want to delete all subscriber information,
Alternatively, when the user desires to erase all the subscriber information, the erasure processing of both the subscriber information and the information registered by the subscriber can be performed.

As described above, the mobile terminal 1 canceled by the user
0 or lost or stolen mobile terminal 10 can delete the subscriber information stored in the mobile terminal 10 in accordance with a command from the subscriber data server 40. The user information can be reassigned to another user, network resources can be used efficiently, and personal information loss of the subscriber when the mobile terminal is lost can be prevented.

In the above example, the subscriber data server 40
And a function of the control device 41 corresponding to the mobile terminal information erasure control device and transmitting a subscriber information erasure command of the subscriber data server 40 (e in FIGS. 3, 4 and f in FIG. 5), and elimination of subscriber information. The function of transmitting the request (a in FIG. 6) corresponds to the erasure instruction means.

The processing at c in FIGS. 3 and 4 and the processing at d in FIG. 5 correspond to the determining means, and the processing shown in FIG. 7 corresponds to the information erasing means.

[0083]

As described above, claims 1 to 9 are as described above.
According to the described invention of the present application, information stored in a mobile terminal is erased based on an instruction from a network side. Therefore, the information can be deleted without bringing the mobile terminal to the communication carrier, and the mobile terminal can store and store the information.
It is possible to reuse the held subscriber information and the like and to protect the privacy of the subscriber.

According to the tenth to eighteenth aspects of the present invention, a mobile terminal information erasure control device for erasing information stored in a mobile terminal according to the mobile terminal information erasing method can be realized. .

Further, according to the present invention as set forth in claims 19 to 21, a mobile terminal for erasing information stored according to such a mobile terminal information erasing method can be realized.

[0086]

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a mobile communication system to which a mobile terminal information erasing method according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram illustrating a configuration of a mobile terminal.

FIG. 3 is a sequence diagram for performing a process of deleting subscriber information based on a transmission request signal transmitted from a mobile terminal.

FIG. 4 is a sequence diagram for performing a process of deleting subscriber information based on a location registration request signal transmitted from a mobile terminal.

FIG. 5 is a sequence diagram for performing a process of deleting subscriber information based on a call response signal signal transmitted from a mobile terminal.

FIG. 6 is a sequence diagram for performing a process of deleting subscriber information from a subscriber data server.

FIG. 7 is a sequence diagram showing a process of deleting subscriber information performed by a mobile terminal.

[Explanation of symbols]

 Reference Signs List 10 mobile terminal 11 transmission / reception unit 12 transmission / reception signal processing unit 13 voice signal processing unit 14 control unit (CPU) 15 storage unit (memory) 16 handset 17 display / operation unit 20 base station 30 exchange station 40 subscriber data server 41 control device

Claims (21)

[Claims] 1. A mobile terminal information erasing method for erasing information stored in a mobile terminal connectable to a mobile communication system in which communication services are provided to mobile terminals registered in a network. 2. The mobile terminal information erasing method according to claim 1, wherein the mobile terminal is instructed via a network to delete the stored information, and the mobile terminal deletes the stored information based on the instruction. 2. The mobile terminal information erasing method according to claim 1, wherein it is determined whether the mobile terminal that has accessed the network is a mobile terminal from which stored information is to be deleted. A mobile terminal information erasing method wherein, when it is determined that the stored information is a mobile terminal to be erased, the mobile terminal is instructed to erase the information via a network. 3. The mobile terminal information erasing method according to claim 1, wherein when the mobile terminal makes a call request to the network, the mobile terminal is a mobile terminal from which stored information is to be deleted. Mobile terminal information erasing method for determining 4. The mobile terminal information erasing method according to claim 1, wherein when the mobile terminal issues a location registration request to the network, the mobile terminal is a mobile terminal from which stored information should be deleted. A mobile terminal information erasing method for determining whether or not the mobile terminal information is deleted. 5. The mobile terminal information erasing method according to claim 1, wherein when the mobile terminal is notified of the incoming call from the network, it is determined whether or not the mobile terminal is the mobile terminal whose stored information is to be deleted. A mobile terminal information erasing method which is determined. 6. The mobile terminal information erasing method according to claim 2, wherein said mobile terminal is to delete stored information based on whether or not a subscriber is registered in said network. A mobile terminal information erasing method for determining whether or not there is a mobile terminal information. 7. The mobile terminal information erasing method according to claim 6, wherein the mobile terminal is instructed to delete the stored subscriber information. 8. The mobile terminal information erasing method according to claim 2, wherein said mobile terminal is stored based on whether or not a specific subscriber information is registered in said network. Mobile terminal information erasing method for determining whether a mobile terminal is a mobile terminal to be erased. 9. The mobile terminal information erasing method according to claim 8, wherein said mobile terminal is instructed to delete stored personal information. 10. Mobile terminal information erasure control for erasing information stored in a mobile terminal connectable to a mobile communication system in which a communication service is provided to mobile terminals registered as a subscriber in a network. In the apparatus, there is provided an erasure instructing means for instructing the mobile terminal to erase the information stored therein via a network, and based on the instruction issued by the erasure instructing means, the information stored in the mobile terminal is deleted. A mobile terminal information erasure control device for erasing. 11. A mobile terminal information erasure control device according to claim 10, wherein said determination means determines whether or not the mobile terminal that has accessed the network is a mobile terminal from which stored information is to be erased. When the determination means determines that the mobile terminal is a mobile terminal from which stored information should be deleted, the deletion instruction means deletes information from the mobile terminal via the network. A mobile terminal information erasure control device for instructing. 12. The mobile terminal information erasure control device according to claim 11, wherein said determination means should delete the information stored in the mobile terminal when the mobile terminal makes a call request to the network. A mobile terminal information erasure control device for determining whether or not the terminal is a mobile terminal. 13. The mobile terminal information erasure control device according to claim 11, wherein when the mobile terminal issues a location registration request to the network, the mobile terminal erases the stored information. A mobile terminal information erasure control device configured to determine whether a mobile terminal is a mobile terminal. 14. The mobile terminal information erasure control device according to claim 11, wherein the determination means is configured to delete the information stored in the mobile terminal when the mobile terminal is notified of the incoming call from the network. A mobile terminal information erasure control device which determines whether or not the mobile terminal information is deleted. 15. The mobile terminal information erasure control device according to claim 11, wherein said determining means stores information stored in said mobile terminal based on whether or not a subscriber is registered in said network. A mobile terminal information erasure control device configured to determine whether a mobile terminal is to be deleted. 16. The mobile terminal information erasure control device according to claim 15, wherein said erasure instruction means instructs said mobile terminal to erase stored subscriber information. . 17. The mobile terminal information erasure control device according to claim 11, wherein said determination means is configured to determine whether said mobile terminal information has been registered as a subscriber in said network with specific subscriber information. A mobile terminal information erasure control device configured to determine whether a terminal is a mobile terminal from which stored information is to be erased. 18. The mobile terminal information erasure control device according to claim 17, wherein said erasure instruction means instructs said mobile terminal to erase stored personal information. 19. A mobile terminal connectable to a mobile communication system in which a communication service is provided to mobile terminals registered as a subscriber in the network, when a predetermined instruction is received via the network. A mobile terminal having information erasing means for erasing stored information. 20. A mobile terminal according to claim 19, wherein said information erasing means erases the stored subscriber information when receiving an instruction to erase the subscriber information. 21. The mobile terminal according to claim 19, wherein said information erasing means erases stored personal information when receiving an instruction to erase personal information.