JPH08205236A - Method for selecting mobile station - Google Patents

Abstract

PURPOSE: To provide a method for selecting a mobile station with which correctness can be simultaneously confirmed concerning plural mobile stations by transmitting a certificate request to all the mobile stations transmitting incoming call receiving/ transmitting requests with in specified time difference. CONSTITUTION: When mobile stations 1 and 2 deal with incoming call receptions 5 and 6 within prescribed time difference (t) with respect to a call incoming request 4 transmitted by communication control equipment 3, the communication control equipment 3 temporarily accepts the call incoming receptions 5 and 6 concerning the mobile stations 1 and 2, certificate requests 7 and 7' are successively transmitted from the communication control equipment 3 to the mobile stations 1 and 2, and call connection is continued to the mobile station 1 that performs a correct certificate response 9' to those certificate requests 7 and 7'. Concerning the incoming call receiving/transmitting request from the authenticated mobile station 1, even when the incoming call receiving/transmitting request from the unauthenticated mobile station 2 is previously received by the communication control equipment 3, the authenticated mobile station can finally originates/terminates a call and the communication of the authenticated mobile station can be prevented from being disturbed by the existence of the unauthenticated mobile station.

Description

Detailed Description of the Invention

[0001]

The present invention is used in mobile communication systems. In particular, it relates to an unauthorized mobile station identification technique.

[0002]

2. Description of the Related Art With the spread of mobile communication systems such as mobile phone service, car phone service, and simplified mobile phone service, the number of mobile stations has increased rapidly, and the justification of the mobile stations has been increasing. It has become necessary to confirm. The main reason is that the signal included in the incoming call request to the mobile station is erroneously received by another mobile station and the mobile station other than the purpose responds. Alternatively, the signal included in the call origination request transmitted from the mobile station is erroneously received by the communication control device as the same as the call origination request of another mobile station. Some kind of failure occurred in the device of the mobile station,
It will respond to incoming requests from other stations. Alternatively,
It will start sending call requests other than your own. There are subscribers who try to improperly modify and use the equipment of the mobile station. And so on.

This conventional example will be described with reference to FIGS. FIG. 6 is an overall configuration diagram of the mobile communication system. FIG. 7 is a time chart showing an incoming call and authentication procedure in the conventional example. FIG. 8 is a flowchart showing a conventional incoming call and authentication procedure in the communication control device. FIG. 9 is a diagram showing a state of call data in the conventional example. FIG. 10 is a time chart showing a transmission and authentication procedure of the conventional example. As shown in FIG. 6, the legitimate mobile station 1 has a legitimate contract with a telecommunications carrier in advance, is registered in the communication control device 3 in the communication network 50, and has legitimate authentication information. Illegal mobile station 2
Is not registered in the communication control device 3. The communication control device 3 has data such as authentication information for the legitimate mobile station 1 and controls communication with the legitimate mobile station 1. In order to make the description easy to understand, in the communication between the mobile station 1 or 2 and the communication control device 3 performed via the base station 40, the presence of the base station 40 will be omitted.

First, the incoming call procedure will be described. The incoming call request 4 shown in FIG. 7 is sent from the communication control device 3 to the legitimate mobile station 1
Alternatively, it is a signal requesting an incoming call to be sent to the unauthorized mobile station 2, the incoming call acceptance 5 is a response to the incoming call request 4 from the unauthorized mobile station 2 to the communication control device 3, and the incoming call acceptance 6 is also a valid move. It is a response to the incoming request 4 from the station 1 to the communication control device 3. In this example, the case where the unauthorized mobile station 2 responds before the valid mobile station 1 is shown. The authentication request 7 is a signal for confirming the legitimacy of the mobile station from the communication control device 3 to the unauthorized mobile station 2 that has previously responded, and the disconnection 8 is the legitimacy of responding with a delay from the communication control device 3. It is a signal for disconnecting the line to the mobile station 1. The authentication response 9 is a response to the authentication request 7 from the unauthorized mobile station 2 to the communication control device 3 and is an authentication response signal based on the unauthorized authentication information, and the disconnection 10 is sent from the communication control device 3 to the unauthorized mobile station 2. This is a signal for disconnecting the line.

FIG. 8 shows a processing procedure of the communication control device 3 at this time. When there is an incoming call from the upper station in the communication network 50 (S1), the call data a on the upper station side is transmitted to the communication control unit 3
It is created inside (S2). FIG. 9 (i) shows the state of call data. As shown in FIG. 7, the incoming call request 4 is transmitted to the mobile stations 1 and 2 (S3). The incoming call reception 5 is performed from the mobile station 1 or 2 (S4). In FIG. 7, since the incoming call acceptance 5 of the unauthorized mobile station 2 arrives at the communication control device 3 earlier than the incoming call acceptance 6 of the legitimate mobile station 1, the incoming call acceptance 6 is not accepted. The communication control device 3 creates the call data b of the mobile station 2 (S5), and associates the call data a and b (S6). This state is shown in FIG. 9 (ii). Then, the authentication request 7 is transmitted (S7). In FIG. 7, the disconnection 8 is transmitted to the legitimate mobile station 1 at this time,
Originally, the authentication request 7 and the disconnection 8 are in no particular order. The authentication response 9 is received from the unauthorized mobile station 2 (S8), and the authentication result is determined (S9). If the authentication result is acceptable, then normal incoming call processing is performed. Mobile station 2 if disqualified as in this example
Disconnection 10 is transmitted to (S10). Then, the association between the call data a and b of the mobile station 2 is released (S1
1). This situation is shown in Fig. 9 (iii). Further, the call data b is released (S12). This state is shown in FIG. 9 (iv). A line disconnection signal is transmitted to the upper station (S13), and the call data a of the upper station is released (S14). This state is shown in FIG. 9 (v).

In addition, the mobile station 2 which is illegal in the calling procedure
It is conceivable that a failure will occur due to the presence of. Figure 10
The conventional transmission and authentication procedures are shown in. Call requests 24 and 2 from the legitimate mobile station 1 and the unauthorized mobile station 2
When 4 ′ arrives at the communication control device 3, only the call origination request 24 from the unauthorized mobile station 2 that first arrives is received by the communication control device 3
And the call acceptance 25 corresponding thereto is returned to the mobile station 2. Subsequently, the authentication procedure is carried out, which is similar to that already described.

[0007]

In such a conventional selection method, when there is an incoming request 4 to the mobile stations 1 and 2 or an outgoing request 24 and 24 'from the mobile stations 1 and 2, In response to an incoming call request 4 from the communication control device 3, the incoming call acceptance 5 is returned fastest, and the communication control device 3
With respect to the mobile station 2 that has transmitted the call origination request 24 fastest, the transmission of the authentication request 7 and the reception of the authentication response 9 as the authentication procedure for confirming the validity of the mobile station 2 Since the unauthorized mobile station 2 receives the incoming call request 4 from the communication control device 3, the unauthorized mobile station 2 receives the incoming call 5 fastest.
If the mobile station 1 sends back the incoming call reception 6 or sends the outgoing call request 24 ', the call connection is not continued when the call is sent back or the outgoing call request 24 is sent fastest. is there. In an extreme case, as long as there is an unauthorized mobile station 2, the legitimate mobile station 1 cannot make or receive calls.

The present invention has been made against such a background, and an object thereof is to provide a mobile station selection method capable of simultaneously confirming the correctness of a plurality of mobile stations. It is an object of the present invention to provide a mobile station selection method in which the communication of a legitimate mobile station is not hindered by the presence of an unauthorized mobile station.

[0009]

According to the present invention, a communication control device accepts an incoming call reception from a mobile station or a plurality of outgoing call requests from the mobile station, and confirms the legitimacy of all the received mobile stations. The most important feature is to carry out authentication.

That is, a first aspect of the present invention is a method of selecting a mobile station, which is characterized in that a plurality of mobile stations are selected within a predetermined time difference with respect to an incoming call request transmitted by a communication control device. When responding to the incoming call acceptance, the communication control device once executes the incoming call acceptance for the plurality of mobile stations, sequentially transmits authentication requests from the communication control device to the plurality of mobile stations, and responds to the authentication request. The call connection is continued to the first mobile station that made a correct authentication response.

Alternatively, when a plurality of mobile stations transmit a call request within a predetermined time difference, the communication control device once executes call acceptance in response to the call requests of the plurality of mobile stations, and the communication control device receives the call requests. The authentication request is sequentially transmitted to the plurality of mobile stations, and the call connection is continued to the mobile station that has made a correct authentication response to the authentication request.

A second aspect of the present invention is a means for transmitting an incoming call request to a mobile station, a means for receiving an incoming call acceptance from the mobile station which responded to the incoming call request, and an outgoing call request from the mobile station. Receiving means, means for sending a call acceptance to the mobile station that has sent this call request, means for sending an authentication request to the call reception or the mobile station that sent this call request, and this authentication The communication control device comprises means for continuing call connection to a mobile station that has responded to the request with proper authentication.

Here, a feature of the present invention is that the means for transmitting the authentication request is such that when a plurality of n incoming call acceptances or outgoing call requests are received within a time difference t, the plurality of n incoming call acceptances or outgoing calls are received. It includes a means for transmitting an authentication request to all mobile stations that have transmitted the request.

The time difference t is preferably a time difference from a time when a predetermined time has passed from the time when the incoming request was transmitted. Alternatively, it is preferable that the time difference t is a time difference from a time when a fixed time has elapsed from the time when the first call origination request was received.

As a result, when the communication control device receives an incoming call reception from a legitimate mobile station immediately after the communication control device receives an incoming call reception from an unauthorized mobile station, or when the communication control device receives an incoming call request from an unauthorized mobile station. Immediately after the communication control device receives the call, even if the communication control device receives the call origination request from the legitimate mobile station, it is possible to make and receive the call to the legitimate mobile station.

[0016]

The communication control device transmits an incoming call request from the upper station to the mobile station, receives an incoming call acceptance from the mobile station, and then sends an authentication request to the mobile station. Alternatively, the communication control device receives a call origination request from the mobile station,
After executing the call acceptance, it sends an authentication request to the mobile station. Authentication is, for example, a personal identification number or other identification number given when the mobile station made a contract with a telecommunications carrier, and the mobile station that received the authentication request returns the personal identification number or other identification number as its authentication response. Must.
The communication control device evaluates the legitimacy of the mobile station by checking this authentication.

The communication control device transmits an authentication request to each of the one or more mobile stations that have received the incoming / outgoing call reception at substantially the same time, receives one or more of the authentication responses returned from the mobile stations, and receives each of the authentication responses. Check the legitimacy. Therefore, even immediately after the communication control device receives an incoming call reception request or an outgoing call request from an unauthorized mobile station, the communication control device can receive an incoming call reception or an outgoing call request from a valid mobile station. In this way, the validity of the mobile stations is confirmed after receiving the incoming call acceptance or the outgoing call request from the plurality of mobile stations.

As a result, it is possible to prevent the communication of the legitimate mobile station from being hindered by the presence of the unauthorized mobile station.

[0019]

Embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a time chart showing an incoming call and authentication procedure according to the embodiment of the present invention. FIG. 2 is a block diagram of the communication control device according to the embodiment of the present invention. FIG. 3 is a flowchart showing an incoming call and authentication procedure according to the embodiment of the present invention. FIG.
FIG. 6 is a diagram showing a state of call data in the embodiment of the present invention. FIG. 5 is a time chart showing a transmission and authentication procedure according to the embodiment of the present invention. The overall configuration of the mobile communication system is shown in FIG.
checking ... In the embodiment of the present invention, the communication control device 3 is provided in the communication network 50. In order to make the explanation easy to understand, in the communication between the mobile station 1 or 2 and the communication control device 3 performed via the base station 40, the base station 40
The presence of is omitted.

The present invention is a method of selecting a mobile station, which is characterized by the communication control device 3 as shown in FIG.
When the mobile stations 1 and 2 respond to the incoming call acceptances 5 and 6 within a predetermined time difference with respect to the incoming call request 4 transmitted by the communication control device 3, the communication control device 3 once accepts the incoming call acceptances 5 and 6 for the mobile stations 1 and 2. , Communication control device 3 to mobile station 1
And authentication requests 7 and 7 ′ are sequentially transmitted to
Correct authentication response 9'for the authentication requests 7 and 7 '
The call connection to the mobile station 1 which has performed

Alternatively, as shown in FIG. 5, the mobile stations 1 and 2 request the call origination 24 and 24 'within a predetermined time difference.
When sending a call, the call origination request 24 of the mobile stations 1 and 2 is transmitted.
And 24 ', the communication control device 3 once executes the call acceptance 25 and 26, sequentially transmits the authentication requests 7 and 7'from the communication control device 3 to the mobile stations 1 and 2, and the authentication requests 7 and 7' The call connection is continued with respect to the mobile station 1 which has given the correct authentication response 9'to 7 '.

The communication control device 3 shown in FIG. 2 includes means for transmitting an incoming call request 4 to the mobile stations 1 and 2, and incoming call acceptances 5 and 6 from the mobile stations 1 and 2 which responded to the incoming call request 4. To receive the call origination requests 24 and 24 'from the mobile stations 1 and 2, and to send call acceptances 25 and 26 to the mobile stations 1 and 2 which transmitted the call origination requests 24 and 24'. Means for transmitting / receiving the incoming / outgoing call control unit 36, means for sending the authentication requests 7 and 7 ′ to the mobile stations 1 and 2 that have sent the incoming call receptions 5 and 6 or the outgoing calls requests 24 and 24 ′, and the authentication request. The authentication confirmation control unit 34 is provided with means for confirming the authenticity of the authentication responses 9 and 9'to 7 and 7 ', and communication control is provided for the means for continuing the call connection to the mobile station 1 which has made the authentic authentication response 9'. Part 30 It is provided.

Here, a feature of the present invention is that the communication control unit 30 receives the plurality of incoming call receptions 5 and 6 or the outgoing call requests 24 and 24 'within the time difference t. 5 and 6 or call request 2
FIG. 3 as means for transmitting authentication requests 7 and 7'to all mobile stations 1 and 2 which transmitted 4 and 24 '.
The control procedure shown in the flowchart of FIG.

This time difference t is a time difference from the time when a predetermined time has elapsed from the time when the incoming request 4 was transmitted. Alternatively, this time difference t is a time difference from the time when a certain time has elapsed from the time when the first call request 24 was received.

Next, the operation of the embodiment of the present invention will be described. The legitimate mobile station 1 has a contract with a telecommunications carrier in advance,
It is registered in the communication control device 3 and has valid authentication information. The unauthorized mobile station 2 is not registered in the communication control device 3. Here, as described in the conventional example, the unauthorized mobile station 2 means that the signal included in the incoming request 4 for the mobile station 1 is erroneously received by another mobile station 2 and the mobile station is not the intended mobile station. 2 responds. Alternatively, the signal included in the call origination request transmitted from the mobile station 2 is erroneously received by the communication control device 3 as the same as the call origination request of the other mobile station 1.
Some failure occurs in the device of the mobile station 2, and the mobile station 2 responds to the incoming call request 4 other than its own station. Alternatively, the transmission request 24 other than the own station is transmitted. There are subscribers who are trying to illegally modify the device of the mobile station 2 to abuse it. Including cases such as. The communication control device 3 has data such as authentication information for the valid mobile station 1 and controls communication with the mobile station 1.

First, the incoming call procedure will be described. As shown in FIG. 1, the incoming call request 4 is transmitted from the communication control device 3 to the legitimate mobile station 1 or the unauthorized mobile station 2. The incoming call acceptance 5 is a response to the incoming call request 4 from the unauthorized mobile station 2 to the communication control device 3. Similarly, the incoming call acceptance 6 is a response to the incoming call request 4 from the legitimate mobile station 1 to the communication control device 3. The authentication request 7 is a signal for confirming the validity of the mobile station from the communication control device 3 to the unauthorized mobile station 2. Similarly, the authentication request 7'is sent from the communication control device 3 to the legitimate mobile station 1
Is a signal for confirming the legitimacy of the corresponding mobile station.
The authentication response 9 is a response to the authentication request 7 from the unauthorized mobile station 2 to the communication control device 3 and is a signal based on the unauthorized authentication information. The authentication response 9'is a response to the authentication request 7'from the legitimate mobile station 1 to the communication control unit 3 and is a signal based on the legitimate authentication information exchanged with the communication control unit 3 in advance. The disconnection 10 is a line disconnection signal from the communication control device 3 to the unauthorized mobile station 2, and the call 12 is a call signal from the legitimate mobile station 1 to the communication control device 3. Response 1
Reference numeral 3 is a response signal from the legitimate mobile station 1 to the communication control device 3. The response confirmation 14 is a response confirmation signal from the communication control device 3 to the legitimate mobile station 1. The communicating state 15 represents a state in which the legitimate mobile station 1 and the communication control device 3 are communicating.

Next, the connection method will be described with reference to FIG. 3, which is a processing procedure in the communication control device 3. When an incoming call from the upper station to the corresponding mobile station 1 occurs (S21), as shown in FIG. 4 (i), in the communication control device 3, the upper station side call data a
Is created (S22). Then, the incoming call request signal 4 is transmitted all at once from the communication control device 3 (S23). An unauthorized mobile station 2 not contracted with a telecommunications carrier returns an incoming call acceptance 5 to the communication control device 3 in response to an incoming call request 4. In accordance with this, the communication control device 3 accepts the incoming call (S24), creates call data on the mobile station side (S25), and associates it with the call data a as shown in FIG. 4 (ii) (S25). S26). A legitimate mobile station 1 that has been contracted with a communication carrier in advance and is registered as a contractor in the communication control device 3 also returns an incoming call acceptance 6 to the communication control device 3 in response to an incoming call request 4. In accordance with this, the communication control device 3 accepts the incoming call (S27), and as shown in FIG. 4 (iii), creates call data on the mobile station side (S2).
8), it is associated with the call data a (S2)
9). The communication control device 3 sends an authentication request 7 for confirming its validity to the mobile station 2 which has transmitted the incoming call acceptance 5 (S30). Similarly, the communication control device 3
An authentication request 7'for confirming its validity is transmitted to the mobile station 1 which transmitted the incoming call acceptance 6 (S31). The mobile station 2 that has received the authentication request 7 transmits an authentication response 9, which is the response, to the communication control device 3 (S32). Similarly, the mobile station 1, which has received the authentication request 7 ', transmits to the communication control device 3 an authentication response 9'based on the authentication information exchanged with the communication control device 3 in advance. Illegal mobile station 2
Upon receiving the authentication response 9 from the communication control device 3, the communication control device 3 detects that the content of the authentication response 9 is an unauthorized authentication response 9 by checking whether the content is based on the authentication information exchanged in advance. (S33), the disconnection 10 for rejecting the communication is transmitted to the mobile station 2 (S3).
7), as shown in FIG. 4 (iv), the correspondence with the call data a is released (S38), and the call data is released (S39). This state is shown in Fig. 4 (v). This allows
The connection processing with the mobile station 2 ends.

Even if a call signal comes before the authentication response 9, it is temporarily recorded by the communication control device 3 and deleted when the disconnection 10 is transmitted.

Upon receiving the authentication response 9'from the legitimate mobile station 1 (S40), the communication control device 3 recognizes that the content of the authentication response 9'is based on the authentication information exchanged in advance. (S41), the connection process for the mobile station 1 is continued. After that, the communication control device 3, which has received the signal of the call 12 from the mobile station 1 and the signal of the response 13 from the mobile station 1, sends out a signal of the response confirmation 14 which is a confirmation signal for the signal of the response 13 and moves. The state becomes 15 during communication with the station 1. The signal of this call 12 is the authentication response 9 '.
If it arrives too early, the communication control device 3 temporarily records it and performs processing after confirming the authentication response.

In addition, an illegal mobile station 2 is used in the calling procedure.
It is conceivable that a failure will occur due to the presence of. FIG. 5 shows a transmission and authentication procedure of the embodiment of the present invention. When the call requests 24 from the legitimate mobile station 1 and the fraudulent mobile station 2 reach the communication control device 3, the call request 24 from the fraudulent mobile station 2 that arrives first and the legitimate mobile station 1 that arrives next.
The call origination request 24 'from the communication control device 3 is accepted by the communication control device 3, and the call acceptances 25 and 26 corresponding thereto are returned to the mobile stations 2 and 1. Subsequently, the authentication procedure is carried out, which is similar to that already described for the incoming call. When the legitimacy of the mobile station 1 is confirmed, a call origination request is sent from the communication control device 3 to the upper station, and subsequently, a call 32 and a response 33 from the upper station are transmitted to the mobile station 1, and the mobile station 1 in response thereto is sent. The response confirmation 34 from 1 is transmitted and the state of 15 during communication is set. As a result, if the present invention is used even in the calling procedure, the communication of the legitimate mobile station 1 is not hindered by the presence of the unauthorized mobile station 2.

In the embodiment of the present invention, the communication control device 3 is described as being provided in the communication network 50, but it may be provided in the base station 40.

[0032]

As described above, according to the present invention,
The validity of a plurality of mobile stations can be confirmed at the same time. That is, even if an incoming call reception request or an outgoing call request from a legitimate mobile station has been received by the communication control device, the legitimate mobile station finally makes an outgoing or incoming call. It can be carried out.

As a result, it is possible to prevent the communication of the legitimate mobile station from being hindered by the presence of the unauthorized mobile station.

[Brief description of drawings]

FIG. 1 is a time chart showing an incoming call and authentication procedure according to an embodiment of the present invention.

FIG. 2 is a block configuration diagram of a communication control device according to the embodiment of the present invention.

FIG. 3 is a flowchart showing an incoming call and authentication procedure according to the embodiment of the present invention.

FIG. 4 is a diagram showing a state of call data according to the embodiment of the present invention.

FIG. 5 is a time chart showing a transmission and authentication procedure according to the embodiment of the present invention.

FIG. 6 is an overall configuration diagram of a mobile communication system.

FIG. 7 is a time chart showing an incoming call and authentication procedure of a conventional example.

FIG. 8 is a flow chart showing a conventional incoming call and authentication procedure.

FIG. 9 is a diagram showing a state of call data in a conventional example.

FIG. 10 is a time chart showing a transmission and authentication procedure of a conventional example.

[Explanation of symbols]

 1, 2 Mobile station 3 Communication control device 4 Incoming call request 5, 6 Incoming call acceptance 7, 7'Authentication request 8, 10 Disconnection 9, 9'Authentication response 12 Call 13, 33 Response 14, 34 Response confirmation 15 Communicating 24, 24 ′ Call request 25, 26 Call acceptance 30 Communication control unit 32 Call 34 Authentication confirmation control unit 36 Send / receive control unit 40 Base station 50 Communication network

Claims (5)

[Claims] 1. When a plurality of mobile stations respond to an incoming call request within a predetermined time difference in response to an incoming call request transmitted by the communication control device, the communication control device once executes the incoming call acceptance for the plurality of mobile stations. However, the communication control device sequentially transmits an authentication request to the plurality of mobile stations, and the call connection is continued to the first mobile station that has made a correct authentication response to the authentication request. How to select the mobile station. 2. When a plurality of mobile stations transmit a call request within a predetermined time difference, the communication control device once performs call acceptance in response to the call requests of the plurality of mobile stations, and the communication control device transmits the call requests. A method of selecting a mobile station, characterized in that an authentication request is sequentially transmitted to the plurality of mobile stations, and the call connection is continued to a mobile station that has made a correct authentication response to the authentication request. 3. A means for transmitting an incoming call request to a mobile station, a means for receiving an incoming call reception from a mobile station responding to the incoming call request, a means for receiving an outgoing call request from the mobile station, Means for sending an outgoing call acceptance to the mobile station that sent the outgoing call request, means for sending an authentication request to the incoming call acceptance or the mobile station that sent this outgoing call request, and valid authentication for this authentication request In the communication control device, which comprises means for continuing the call connection to the mobile station that responded to the request, the means for transmitting the authentication request has a plurality of n
When the incoming call acceptance or outgoing call request is received, the communication control device includes means for sending an authentication request to all the mobile stations that have sent the plural incoming call incoming requests or outgoing requests. 4. The time difference t is a time difference from a time when a certain time has elapsed from the time when the incoming request was transmitted.
The communication control device described. 5. The communication control device according to claim 3, wherein the time difference t is a time difference from a time when a predetermined time has elapsed from the time when the first call origination request was received.