JP2001025067A - Mobile communication system, clone terminal detecting method and charging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for easily detecting a clone suspicion terminal in a mobile telephone system through an exchange device and the subscriber data managing device of a terminal while utilizing a position registration area number. SOLUTION: This system is provided with PHS(R) exchange device D1 and D2 for judging whether or not the area number of a base station C2 in an area B2, where a call originating mobile terminal exists, is matched with the position registration area number based on the terminal number of the call originating mobile terminal when there is call origination from a mobile terminal A2 having the same terminal number and the same certification information as a mobile terminal A1 for legal utilization and a PS terminal data managing device E1 for reporting that it is possible for the call originating mobile terminal to be illegally used as a clone terminal to a maintenance person when mismatching, is discriminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, a method for detecting a clone terminal, and a charging method.
Detection of suspected clone terminals (duplicate mobile terminals that have copied the telephone number and authentication key information of the mobile terminal of the authorized subscriber) in mobile phone systems such as PHS and mobile phones, and restrictions on use outside designated areas The present invention relates to a mobile communication system, a clone terminal detection method, and a charging method suitable for realizing a notification service and a special charge setting service.

[0002]

2. Description of the Related Art Conventionally, PHS (Personal Handy-phone S)
ystem) is already being used by young people as a sufficient carrier for mobile communications in Japan as a system that satisfies personal communications at a low cost. However, due to the common sense in Japan, there is currently no sufficient protection function for a terminal that is a copy of a dummy portable mobile terminal of a mobile terminal that communicates at a call charge of another person, that is, a clone terminal.

Under such circumstances, in order for the PHS system to be accepted as a more international communication system, a function of protecting a mobile terminal from copying has become indispensable. In addition, the above protection function is provided by PDC (Personal Digit
al Cellular) and the next generation IMT-2000 (Internati
onal Mobile Telecommunications-2000) and cdm
A system such as a-one is also indispensable.

[0004] Taking the PHS as an example of the above-mentioned protection function, the PHS currently uses an encryption authentication method to prevent use by an unauthorized terminal. However, PHS includes all authentication keys including authentication key information set in the PHS terminal. Is in a state where unauthorized use can be easily performed. As a method of preventing unauthorized use from the copy terminal (clone terminal), a key is already stored in the mobile terminal together with the key information for each call.
A method has been proposed in which variable information sent from the HS switching device is retained to prevent use from a clone terminal which is an unauthorized terminal.

As a conventional example relating to the detection of the illegal use of the clone terminal, a technique described in, for example, Japanese Patent Application Laid-Open No. 9-322251 has been proposed. The gazette aims to detect illegal use by a clone terminal at an early stage, and the home exchange stores the location information of the mobile terminal, as well as the last calling telephone number or the last caller of the mobile terminal. A subscriber data memory for storing at least one of a telephone number and a last location registration date and time, wherein the switching center or the mobile terminal transmits the subscriber of the home switching center at the time of location registration or calling of the mobile terminal; A mobile communication system characterized by including a configuration for determining the presence or absence of a clone terminal based on information stored in a data memory is disclosed.

[0006]

However, the above-described prior art has the following problems.

As described above, as a method of preventing unauthorized use by a copy terminal (clone terminal), variable information of a moving point sent from the PHS switching apparatus for each call is already stored in the terminal together with key information. Although a system for preventing the use of unauthorized terminals has been proposed, as described in the above publication, PHS terminals, base stations, exchanges, and databases require drastic changes in mechanisms and functions, and systems that are already in operation Has a large impact and takes a lot of time to realize. Against this background, there is currently a need for a quick-acting clone terminal protection method or detection method.

An object of the present invention is to provide a method for easily detecting a suspected clone terminal in a mobile telephone system by using a location registration area number by a switching device and a subscriber data management device of the terminal. To provide a mobile communication system, a clone terminal detection method, and a billing method that can realize the above.

[0009]

SUMMARY OF THE INVENTION According to the present invention, in a mobile communication system capable of detecting unauthorized use of a clone terminal, a call is issued from a mobile terminal having the same terminal number and authentication information as a mobile terminal of regular use. A matching determining means for determining whether an area number of a base station in an area where the calling mobile terminal is present matches a location registration area number based on the terminal number of the calling mobile terminal; If the determination unit determines that the mobile terminal is inconsistent, a warning generating unit is provided for notifying a maintenance person that the calling mobile terminal may be illegally used as a clone terminal.

Further, the present invention relates to a clone terminal detection method for detecting unauthorized use of a clone suspected terminal in a mobile communication system, wherein a call is issued from a mobile terminal having the same terminal number and authentication information as a regular use mobile terminal. In this case, it is determined whether or not the area number of the base station in the area where the calling mobile terminal exists and the location registration area number based on the terminal number of the calling mobile terminal match, and it is determined that there is a mismatch. In such a case, the maintenance person is notified that the calling mobile terminal may be illegally used as a clone terminal, and a normal connection process or an outgoing call restriction process or the clone terminal is performed in accordance with the connection destination type of the clone terminal. And performing a process for obtaining confirmation.

The present invention also provides a billing method for performing a use notification service and / or a special charge setting service outside the designated area of a mobile terminal permitted to use only the designated area. If there is, the mobile terminal determines whether the area number of the base station in the area where the location of the mobile terminal is registered matches the location registration area number based on the terminal number of the mobile terminal, if it is determined that there is a mismatch, A special charge notification for notifying a maintenance person that the mobile terminal is used outside the designated area and for restricting a call to a mobile terminal outside the designated area and / or notifying a special charge to the mobile terminal. Processing is performed.

Further, the mobile communication system of the present invention
In a mobile communication system capable of detecting unauthorized use of a clone terminal, a mobile terminal (A2 in FIG. 2) having the same terminal number and authentication information as a mobile terminal for normal use (A1 in FIG. 2) will be described. ), The location registration based on the area number of the base station (C2 in FIG. 2) and the terminal number of the calling mobile terminal in the area (B2 in FIG. 2) where the calling mobile terminal is located. Matching judging means for judging whether or not the area number matches (PHS switching device D2 in FIG. 2)
And a warning generating means for notifying a maintenance person that the calling mobile terminal may be illegally used as a clone terminal when the matching determining means determines that there is an inconsistency (the PS terminal data in FIG. 2). Management device E1).

[Operation] According to the clone terminal detecting method of the present invention, the area number of the base station in the area where the calling mobile terminal exists and the location registration area number based on the terminal number of the calling mobile terminal are inconsistent. In some cases, control is performed to notify a maintenance person that the calling mobile terminal may be illegally used as a clone terminal. As a result, the detection of the suspected clone terminal can be realized only by the program control of the switching device and the terminal data management device, and it is not necessary to add a function to the mobile terminal and the base station which are already operating, and a large investment is not required. Can be easily detected.

[0014] Further, the billing method of the present invention is characterized in that, when the area number of the base station in the area where the mobile terminal exists and the location registration area number based on the terminal number of the mobile terminal are inconsistent, the mobile terminal The maintenance person is notified of the use outside the designated area, and is controlled so as to perform a call restriction process or a special charge notification process. For this reason, it is possible to realize a use notification service and a special charge setting service for warning of the occurrence of a clone outside the area of the terminal permitted to use only the designated base station area in the mobile terminal.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment Next, a first embodiment of the present invention will be described in detail with reference to the drawings.

(1) Description of Configuration FIG. 1 is a block diagram showing a configuration example of a PHS mobile telephone system according to a first embodiment of the present invention. In FIG. 1, a PHS mobile phone system according to a first embodiment of the present invention
S (Personal Station: digital system cordless wireless connection device supporting PHS service) mobile terminal A
1, base station C1, PHS exchange D1, other telephone network F1,
Announcement G2, operator G1, PS terminal data management device E1, OAM (Operation Administration and Mai)
ntenance) terminal H1. In the figure, B1 is a calling area, and B2 is an adjacent area.

To explain the above configuration in detail, in the PHS system, one paging area B1 is constituted by a plurality of base stations C1 in order to enable incoming call to the mobile terminal A1. When the PS mobile terminal A1 is moving in this area B1 or moving from another area to the area B1, the PS mobile terminal A1
1, the location number of the base station C1 to which the terminal belongs is changed via the PHS switching device D1 in the PS terminal data management device (subscriber data management device) E1 of the terminal. Set to the location registration area number. If there is a clone terminal having the same terminal number and authentication key information as the regular use terminal, the last registered area number of the regular use terminal or clone terminal is the PS number in the PS terminal data management device E1. Terminal A1 data part, location registration area number, service information, area B
It will be set as 1.

OAM (Operation Administration)
and Maintenance) The terminal H1 is a manager terminal that manages the PS terminal data management device E1, and manages the occurrence of clone terminals, the number of clone terminals, and the like, and performs systematic management. Similarly, the PHS switching device D1 also has the operator device G1 and the operator P
It also manages the communication and notification of the occurrence of the clone terminal to the S mobile terminal and the like by sending the data by voice synthesis or the like to the maintenance center by announcement G2, publicizing, and recommending attention. The other telephone network F1 has P
An ISDN network is used for the HS, and may be a public line, a dedicated line, or the like.

Using this system, the PS mobile terminal A1
At the time of transmission, the area number to which the base station C1 belongs and the location registration area number in the PS terminal data management device E1 are matched to confirm that the corresponding terminal number may be illegally used as a clone terminal. It is configured to allow a maintenance person to be notified of an alarm output indicating that the clone is a clone.

FIG. 2 is a block diagram for explaining a method of detecting a suspected clone terminal in the PHS mobile telephone system according to the first embodiment of the present invention. In FIG. 2, a PHS mobile telephone system according to a first embodiment of the present invention includes a PS mobile terminal A1, a base station C1, a base station C2, a PHS switching device D1, a PHS switching device D2, another telephone network F1, an operator G1, Announcement G2, PS terminal data management device E1,
It is composed of an OAM terminal H1. In the figure, A2 is PS
A clone terminal that performs a dummy operation on the terminal A1,
B1 and B2 are calling areas.

The above configuration will be described in detail. The method for detecting a suspected clone terminal according to the first embodiment of the present invention is based on the PHS switching apparatus D.
2 operates under the control of the clone detection program in the PS2 and the control of the clone warning notification service data and the alarm output program in the PS terminal data management device E1. The PHS system includes a PS mobile terminal A1, a base station C1 installed in each region, PHS switching devices D1 and D2 for performing exchange control such as location registration operation and call connection operation, service information and call area information of PS terminal subscribers. P that manages the data of
It is configured by the S terminal data management device E1.

The functions to be realized in the first embodiment of the present invention include PHS switching devices (PHS servers) D1, DHS
2 and the PS terminal data management device (subscriber data management device) E1 notify the terminal number that the clone is likely to be used only by the small-scale software change, thereby detecting the clone suspected terminal early. This is a function proposed for defense purposes.

(2) Description of Operation Next, the operation of the first embodiment of the present invention will be described with reference to FIGS.
This will be described in detail with reference to FIG.

First, the outline of the first embodiment will be described with reference to the block diagram of FIG. First, the regular PS shown in FIG.
When the mobile terminal A1 moves to the calling area B1 of the base station C1, a position registration request is sent from the PS mobile terminal A1 to the base station C1.
1, the base station C1 sends a location registration request signal to the PHS switching apparatus D1. The PHS exchange device D1 receives the location registration request signal and transmits the information of the calling area B1 to which the base station C1 belongs to the PS terminal data management device E1.
In the corresponding PS terminal data section.

Next, when a clone terminal A2 having the same PS number and authentication information as the PS mobile terminal A1 makes a call in the calling area B2 of the base station C2, a call signal is transmitted to the PHS switching apparatus D2 through the base station C2. Sent out. PHS
In the switching device D2, a call connection operation program is started, and a service for detecting a suspected clone terminal is realized within this program control.

Next, the program operation of the clone terminal detection service in the PHS switching devices D1 and D2 and the PS terminal data management device E1 will be described with reference to the flowchart of FIG. 3 and the block diagram of FIG. The step numbers in FIG. 4 correspond to the step numbers in FIG. At the time of calling from the clone terminal, in step S31, the number of the calling base station is read from the base station data section in the PHS switching devices D1, D2, and in step S32, the base station area number is changed from the base station number. Convert. Next, in step S33, the location area number in the PS terminal data management device E1 is extracted from the terminal number of the originating PS mobile terminal.

In step S34, the base station area number obtained in step S32 is matched with the location area number extracted in step S33. In the case of a call originating from a clone terminal using the corresponding PS number, the above area number becomes inconsistent, and in step S35, it is determined whether the corresponding PS terminal is a target of the clone terminal notification, and a warning notification service of the clone terminal notification is provided. If provided, the clone suspected terminal number and the originating base station number are notified in step S36, and the PS terminal data management device E1 executes alarm and message notification to the legitimate mobile terminal maintenance person in step S37.

Next, in step S38, an outgoing call is connected to the designated connection destination when the clone terminal is detected. in this case,
Normal call connection is performed according to the connection destination type (step S3).
9), the call may be regulated (step S40), or a connection may be made with the designated announcement and the operator to obtain confirmation for the suspected terminal (step S41).

According to the first embodiment of the present invention, the existing P
HS terminal ← → base station ← → PHS server communication interface is used as it is, so there is no need to make a significant investment by adding functions to already sold and operated PHS terminals and base stations, and clone terminals that can be operated at an early stage It can be used as a detection method. In addition, by partially utilizing this method and using it as an information notification service of terminal use in areas other than a specific area, it is possible to expect an increase in fee collection as an additional service.

That is, the present invention can be realized only by the program control of the PHS switching devices D1 and D2 and the PS terminal data management device E1, and it is not necessary to add a function to the PS mobile terminal and the base station which are already in operation, and a large investment is not required. In addition, detection of a suspected clone terminal can be simplified.

In the first embodiment of the present invention, the case where the suspected clone terminal is detected in the PHS mobile telephone system is described as an example. However, the present invention is not limited to this, and the PDC mobile telephone is not limited to this. System and next generation IMT-20
Also in the 00 mobile telephone system, it is possible to detect a suspected clone terminal.

[Second Embodiment] Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

(1) Description of Configuration A PHS mobile telephone system according to a second embodiment of the present invention comprises:
As in the first embodiment shown in FIG. 1, the PS mobile terminal A1, the base station C1, the PHS switching device D1, and the other telephone network F
1. Operator G1, PS terminal data management device E1, O
It consists of an AM terminal H1. Details of the configuration have been described in the first embodiment, and a description thereof will be omitted.

The second embodiment of the present invention is realized by program control in the PHS switching device D1 similar to the clone terminal detection program of the first embodiment. The second embodiment of the present invention provides a method for realizing a use notification service and a special charge setting service outside the area of a terminal permitted to use only a designated base station area in a PS mobile terminal. is there.

(2) Description of Operation Next, the operation of the second embodiment of the present invention will be described with reference to FIGS.
This will be described in detail with reference to FIG.

In step S51, the number of the transmitting base station is read from the base station data section in the PHS switching apparatus D1, and in step S52, the number of the base station C1 is converted into the area number of the base station. Next, in step S53,
The location area number in the PS terminal data management device E1 is extracted from the terminal number of the originating PS mobile terminal. An area number designated for use is set in this position area number.

In step S54, the base station area number obtained in step S52 is matched with the location area number extracted in step S53. If the corresponding PS mobile terminal is used in an area other than the designated area, the area numbers will be inconsistent. In step S55, it is determined whether or not the PS mobile terminal is to be used outside the designated area. If a service for notifying that the PS mobile terminal is to be used outside the designated area is provided, step S55 is performed.
Notification of 56 PS terminal numbers and transmission base station numbers.
In step S57, the PS terminal data management device E1 issues an alarm and a message to the maintenance person.

Next, in step S58, the type branch of the service connection destination is performed. In this case, the call is regulated by the connection destination when the outside of the designated area is used (step S60), and a notification operation for connecting to the designated announcement and the operator and charging a special fee for a call outside the designated area is executed. (Step S61).

According to the second embodiment of the present invention, the functions can be realized only by the program control of the PHS switching device and the PS terminal data management device. Is unnecessary, so that the suspected clone terminal can be easily detected. Also,
If a service that allows updating and changing of the designated area in real time is planned so that a call can be made as a legitimate mobile terminal even outside the designated area, the effect of the present embodiment is enhanced.

In the second embodiment of the present invention, the case where the PHS mobile phone system realizes the use notification service outside the area and the special charge setting service is described as an example.
The present invention is not limited to this, but includes PDC mobile telephone systems, next-generation IMT-2000 and cdma-
Also in a mobile telephone system such as one, a use notification service outside the area and a special charge setting service are possible, which is effective in detecting a clone terminal and restricting the operation of the clone terminal.

[0041]

As described above, according to the present invention, the area number of the base station in the area where the calling mobile terminal exists and the location registration area number based on the terminal number of the calling mobile terminal are inconsistent. In the case of, since the calling mobile terminal is controlled so as to notify the maintenance person that there is a possibility that the calling mobile terminal has been illegally used as a clone terminal, the clone suspected terminal detection is performed by the switching device and the terminal data management device. Since it can be realized only by program control, it is not necessary to add a function to a mobile terminal and a base station which are already in operation, and a large investment is not required, so that there is an effect that detection of a suspected clone terminal can be simplified.

According to the present invention, when the area number of the base station in the area where the mobile terminal exists and the location registration area number based on the terminal number of the mobile terminal are inconsistent, the mobile terminal can Terminals that notify the maintenance person that they are being used outside the designated area and control to perform call barring processing or special charge notification processing, so mobile terminals are allowed to use only the designated base station area. There is an effect that the use notification service and the special charge setting service outside the area can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of a PHS mobile telephone system according to first and second embodiments of the present invention.

FIG. 2 is a block diagram illustrating a method of detecting a suspected clone terminal in the PHS mobile phone system according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating a clone terminal detection process according to the first embodiment of this invention.

FIG. 4 is a block diagram for explaining a program operation of a clone terminal detection service according to the first embodiment of the present invention.

FIG. 5 is a flowchart illustrating a clone terminal detection process according to the second embodiment of this invention.

[Explanation of symbols]

 A1 PS mobile terminal A2 Clone terminal B1, B2 Calling area C1, C2 Base station D1, D2 PHS switching device E1 PS terminal data management device

Claims (6)

[Claims] In a mobile communication system capable of detecting unauthorized use of a clone terminal, when a call is made from a mobile terminal having the same terminal number and authentication information as a mobile terminal for regular use, the calling mobile terminal is Matching judgment means for judging whether or not the area number of the base station in the existing area and the location registration area number based on the terminal number of the calling mobile terminal match; And a warning generating means for notifying a maintenance person that the calling mobile terminal may be illegally used as a clone terminal. 2. An exchange device for setting information on an area where the legitimately used mobile terminal exists in a terminal data management device based on a location registration request sent from the legitimately used mobile terminal. The mobile communication system according to claim 1, wherein 3. When the matching judging means judges that there is an inconsistency, a normal connection process or an outgoing call restriction process or a process for obtaining confirmation for the clone terminal is executed in accordance with the type of the connection destination of the clone terminal. The mobile communication system according to claim 1, wherein: 4. PHS (Personal Handy-phone System)
m), PDC (Personal Digital Cellular), IMT-
2000 (International Mobile Telecommunications-
The mobile communication system according to any one of claims 1 to 3, wherein the mobile communication system is applicable to the detection of the clone terminal according to any one of (1) to (2). 5. A clone terminal detection method for detecting unauthorized use of a suspected clone terminal in a mobile communication system, wherein a call is issued from a mobile terminal having the same terminal number and authentication information as a regular use mobile terminal. It is determined whether or not the area number of the base station in the area where the calling mobile terminal is present matches the location registration area number based on the terminal number of the calling mobile terminal. The maintenance person is notified that the call mobile terminal may be illegally used as a clone terminal, and a normal connection process or a call restriction process or a confirmation for the clone terminal is obtained in accordance with the connection destination type of the clone terminal. A clone terminal detection method, characterized by performing a process. 6. A billing method for performing a use notification service and / or a special charge setting service of a mobile terminal permitted to use only a designated area outside the designated area, wherein when a call is made from the mobile terminal, The mobile terminal determines whether or not the area number of the base station in the area where the location of the mobile terminal is registered and the location registration area number based on the terminal number of the mobile terminal match. Notifying a maintenance person of the use outside the designated area and performing a call regulation process for regulating a call to a mobile terminal outside the designated area and / or a special charge notification process for notifying the mobile terminal of a special charge. A billing method characterized by the following.