JP3125611B2 - How to select a mobile station - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is applied to a mobile communication system. In particular, the present invention relates to a technique for identifying an unauthorized mobile station.

[0002]

2. Description of the Related Art With the spread of mobile communication systems such as a mobile phone service, a car phone service, and a simplified mobile phone service, as the number of mobile stations rapidly increases, the validity of a large number of mobile stations is increased. It has become necessary to confirm. The main reason is that a signal contained in an incoming request for a mobile station is erroneously received by another mobile station, and an unintended mobile station responds. Alternatively, a signal included in the transmission request transmitted from the mobile station is erroneously received by the communication control device as the same as the transmission request of another mobile station. If some sort of failure occurs in the mobile station device,
It responds to incoming requests other than its own. Or,
A transmission request other than the own station is transmitted. There are subscribers who attempt to illegally modify and exploit mobile station devices. And so on.

[0003] 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 of a 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 a conventional example. FIG. 10 is a time chart showing a transmission and authentication procedure of a conventional example. As shown in FIG. 6, a legitimate mobile station 1 has a valid contract with a communication company in advance, is registered in the communication control device 3 in the communication network 50, and has valid 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 via the base station 40, the description will be made while omitting the existence of the base station 40.

[0004] First, an incoming call procedure will be described. The incoming call request 4 shown in FIG.
Alternatively, it is a signal requesting an incoming call transmitted to the unauthorized mobile station 2, the incoming call reception 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 reception 6 is similarly a legitimate mobile This is a response to the incoming call request 4 from the station 1 to the communication control device 3. In this example, a case is shown in which the unauthorized mobile station 2 responds before the valid mobile station 1. The authentication request 7 is a signal for confirming the validity of the relevant mobile station to the unauthorized mobile station 2 to which the communication control device 3 has previously responded. This 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 incorrect authentication information, and the disconnection 10 is transmitted from the communication control device 3 to the unauthorized mobile station 2. Line disconnection signal.

FIG. 8 shows a processing procedure of the communication control device 3 at this time. When there is an incoming call from an upper station in the communication network 50 (S1), the call data a of the upper station is
(S2). FIG. 9 (i) shows the state of the call data. As shown in FIG. 7, an incoming call request 4 is transmitted to the mobile stations 1 and 2 (S3). An incoming call reception 5 is performed from the mobile station 1 or 2 (S4). In FIG. 7, since the incoming call reception 5 of the unauthorized mobile station 2 arrives at the communication control device 3 earlier than the incoming call reception 6 of the legitimate mobile station 1, the reception of the incoming call reception 6 is not performed. The communication control device 3 creates the call data b of the mobile station 2 (S5), and associates the call data a and b with each other (S6). This state is shown in FIG. 9 (ii). Subsequently, an 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. An authentication response 9 is received from the unauthorized mobile station 2 (S8), and the authentication result is determined (S9). If the authentication result is passed, a normal incoming call process is performed. Mobile station 2 if disqualified as in this example
Is transmitted to the user (S10). Subsequently, 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. 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.

[0006] Also, in the calling procedure, the illegal mobile station 2
It is conceivable that a failure may occur due to the presence of. FIG.
Fig. 1 shows a conventional transmission and authentication procedure. Outgoing requests 24 and 2 from legitimate mobile station 1 and fraudulent mobile station 2
4 'arrives at the communication control unit 3, only the outgoing call request 24 from the unauthorized mobile station 2 which arrives first is sent to the communication control unit 3.
, And a call reception 25 corresponding thereto is returned to the mobile station 2. Subsequently, an authentication procedure is performed, 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 outgoing requests 24 and 24 'from the mobile stations 1 and 2, In response to the incoming call request 4 from the communication control device 3, the incoming call reception 5 is returned the fastest.
The transmission of the authentication request 7 and the reception of the authentication response 9 as an authentication procedure for confirming the validity of the mobile station 2 with respect to the mobile station 2 that has transmitted the transmission request 24 most quickly The unauthorized mobile station 2 responds to the incoming request 4 from the communication control device 3
Is returned or the outgoing call request 24 is transmitted at the highest speed, the legitimate mobile station 1 returns the incoming call acceptance 6 or the call connection is not continued even if the outgoing call request 24 'is transmitted. is there. In an extreme case, as long as the unauthorized mobile station 2 exists, the transmission and reception of the valid mobile station 1 cannot be performed.

[0008] The present invention has been made in view of such a background, and an object of the present invention is to provide a method of selecting a mobile station capable of simultaneously confirming the validity of a plurality of mobile stations. An object of the present invention is to provide a method for selecting a mobile station in which 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 apparatus receives a plurality of incoming calls from a mobile station or a plurality of outgoing requests from a mobile station, and confirms the validity of all the received mobile stations. The most important feature is to perform authentication for the purpose.

[0010] That is, a first aspect of the present invention is a mobile station selection method, which is characterized by a plurality of mobile stations within a predetermined time difference with respect to an incoming call request transmitted by a communication control device. When responding to the incoming call reception, the communication control device executes the incoming call reception once for the plurality of mobile stations, sequentially transmits an authentication request from the communication control device to the plurality of mobile stations, and responds to the authentication request. In this case, the call connection is continued to the first mobile station that has made a correct authentication response.

Alternatively, when a plurality of mobile stations transmit a transmission request within a predetermined time difference, the communication control device executes transmission reception once for the transmission requests of the plurality of mobile stations, and the communication control device transmits the transmission request. An authentication request is sequentially transmitted to the plurality of mobile stations, and call connection is continued to a 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 reception from the mobile station responding to the incoming request, and an outgoing call request from the mobile station. Receiving means, a means for transmitting a call acceptance to the mobile station which has transmitted the call request, a means for transmitting the authentication request to the mobile station which has transmitted the call reception or the call request, and Means for continuing call connection to a mobile station that has responded to the request with valid authentication.

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

It is desirable that the time difference t is a time difference from a time when a predetermined time has passed from a time when the incoming call request was transmitted. Alternatively, it is desirable that the time difference t is a time difference from a time when a predetermined time has passed from a time when the first transmission request is received.

[0015] Thus, the communication control device may receive an incoming call from a legitimate mobile station immediately after the communication control device receives an incoming call from an unauthorized mobile station, or a call request from an unauthorized mobile station. Immediately after the communication control device receives the request, even if the communication control device receives an outgoing request from a legitimate mobile station, the call can be transmitted / received to / from the valid mobile station.

[0016]

The communication control device transmits an incoming request from the upper station to the mobile station, and after receiving the incoming call reception from the mobile station, transmits an authentication request to the mobile station. Alternatively, the communication control device receives a call request from the mobile station,
After executing the call reception, an authentication request is transmitted to the mobile station. Authentication is, for example, a personal identification number or other identification number given to the mobile station at the time of contract with a communication carrier, and the mobile station receiving the authentication request returns a personal identification number or other identification number as an authentication response. Must.
The communication control device evaluates the validity of the mobile station by checking this authentication.

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

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

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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 apparatus 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 calling and authentication procedure according to the embodiment of the present invention. Figure 6 shows the overall configuration of the mobile communication system.
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 description easy to understand, in communication between the mobile station 1 or 2 and the communication control device 3 performed via the base station 40, the base station 40
Will be omitted and described.

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

Alternatively, as shown in FIG. 5, the mobile stations 1 and 2 send outgoing requests 24 and 24 'within a predetermined time difference.
Is transmitted, the outgoing requests 24 of the mobile stations 1 and 2 are transmitted.
The communication control device 3 once executes the transmission acceptance 25 and 26 for the communication requests 24 and 24 ', and sequentially transmits the authentication requests 7 and 7' to the mobile stations 1 and 2 from the communication control device 3, and the authentication requests 7 and 7 ' The call connection is to be continued to the mobile station 1 which has made a 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 receiving incoming calls 5 and 6 from the mobile stations 1 and 2 responding to the incoming call request 4. , Means for receiving transmission requests 24 and 24 'from mobile stations 1 and 2, and transmission reception 25 and 26 to mobile stations 1 and 2 which transmitted transmission requests 24 and 24'. Means for transmitting the authentication requests 7 and 7 'to the mobile stations 1 and 2 which have transmitted the reception 5 and 6 or the transmission requests 24 and 24'. A means for confirming the validity of the authentication responses 9 and 9 'with respect to 7 and 7' is provided in the authentication confirmation control unit 34, and the means for continuing the call connection to the mobile station 1 having made the valid authentication response 9 'is controlled by communication control. Part 30 It is provided.

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

The time difference t is a time difference from the time when the incoming call request 4 is transmitted and a time after a lapse of a predetermined time. Alternatively, the time difference t is a time difference between the time when the first transmission request 24 is received and the time when a predetermined time has elapsed.

Next, the operation of the embodiment of the present invention will be described. The legitimate mobile station 1 is contracted in advance with a telecommunications carrier,
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, the illegal mobile station 2 is, as already described in the conventional example, a signal included in the incoming call request 4 for the mobile station 1 is erroneously received by another mobile station 2 and an unintended mobile station 2 2 responds. Alternatively, a signal included in the transmission request transmitted from the mobile station 2 is erroneously received by the communication control device 3 as the same as the transmission request of another mobile station 1.
When some trouble occurs in the device of the mobile station 2, the mobile station 2 responds to the incoming call request 4 other than the own station. Alternatively, a transmission request 24 other than the own station is transmitted. There are subscribers who attempt to illegally remodel and exploit the device of the mobile station 2. Including such cases. The communication control device 3 has data such as authentication information for a valid mobile station 1 and controls communication with the mobile station 1.

First, an 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 reception 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 reception 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 2 from the communication control device 3 to the unauthorized mobile station 2. Similarly, the authentication request 7 ′ is transmitted from the communication control device 3 to the valid mobile station 1.
To confirm the validity of the 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 incorrect authentication information. The authentication response 9 'is a response to the authentication request 7' from the valid mobile station 1 to the communication control device 3 and is a signal based on valid authentication information previously exchanged with the communication control device 3. The disconnection 10 is a signal of a line disconnection from the communication control device 3 to the unauthorized mobile station 2, and the call 12 is a call signal from the valid mobile station 1 to the communication control device 3. Response 1
Reference numeral 3 denotes a response signal from the valid mobile station 1 to the communication control device 3. The response confirmation 14 is a signal for confirming a response from the communication control device 3 to the legitimate mobile station 1. During communication 15 indicates a state in which communication is being established between the legitimate mobile station 1 and the communication control device 3.

Next, a 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 mobile station 1 occurs (S21), as shown in FIG.
Is created (S22). Subsequently, the incoming call request signal 4 is simultaneously transmitted from the communication control device 3 (S23). The unauthorized mobile station 2 that has not made a contract with the communication company returns an incoming call reception 5 to the communication control device 3 in response to the incoming call request 4. In accordance with this, the communication control device 3 accepts the incoming call (S24), creates the mobile station side call data (S25), and associates it with the call data a as shown in FIG. 4 (ii) (S25). S26). A legitimate mobile station 1 which has been previously contracted with a communication company and registered as a contractor in the communication control device 3 also returns a call reception 6 to the communication control device 3 in response to the call request 4. In accordance with this, the communication control device 3 accepts an incoming call (S27), and creates mobile station side call data as shown in FIG. 4 (iii) (S2).
8) Correlate with call data a (S2)
9). The communication control device 3 sends an authentication request 7 for confirming the validity to the mobile station 2 that has transmitted the incoming call reception 5 (S30). Similarly, the communication control device 3
An authentication request 7 'for confirming the validity is transmitted to the mobile station 1 which has transmitted the incoming call reception 6 (S31). The mobile station 2 having received the authentication request 7 transmits an authentication response 9 as a response to the authentication request 7 to the communication control device 3 (S32). Similarly, the mobile station 1 that has received the authentication request 7 ′ transmits an authentication response 9 ′ based on the authentication information exchanged with the communication control device 3 in advance to the communication control device 3. Illegal mobile station 2
The communication control device 3 which has received the authentication response 9 from the server detects that the authentication response 9 is an unauthorized authentication response 9 by checking whether the content of the authentication response 9 is based on the authentication information exchanged in advance. Then, a disconnection 10 for rejecting the communication is transmitted to the mobile station 2 (S3).
7), as shown in FIG. 4 (iv), the association with the call data a is released (S38), and the call data is released (S39). This state is shown in FIG. This allows
The connection processing with the mobile station 2 ends.

Even if a call signal arrives before the authentication response 9, the communication control device 3 temporarily records the call signal and deletes it together with the transmission of the disconnection 10.

The communication control device 3 having received the authentication response 9 'from the valid mobile station 1 (S40) recognizes that the content of the authentication response 9' is based on the authentication information exchanged in advance. (S41), the connection processing to the mobile station 1 is continued. Hereinafter, 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 a signal of a response confirmation 14 which is a signal for confirming the signal of the response 13, and During communication with the station 1, the state becomes 15. The signal of this call 12 is the authentication response 9 '.
If it arrives earlier than this, the communication control device 3 temporarily records it and performs processing after confirming the authentication response.

Also, in the calling procedure, the illegal mobile station 2
It is conceivable that a failure may occur due to the presence of. FIG. 5 shows a calling and authentication procedure according to the embodiment of the present invention. When the transmission requests 24 from the legitimate mobile station 1 and the unauthorized mobile station 2 reach the communication control device 3, the transmission request 24 from the unauthorized mobile station 2 that has arrived first and the transmission request 24 that has arrived next from the legitimate mobile station 1
Is received by the communication control device 3, and the transmission receptions 25 and 26 corresponding thereto are returned to the mobile stations 2 and 1. Subsequently, an authentication procedure is performed, which is similar to that already described for the incoming call. When the validity of the mobile station 1 is confirmed, an outgoing call request is sent from the communication control device 3 to the upper station, and then a call 32 and a response 33 from the upper station are transmitted to the mobile station 1 and the mobile station 1 responds thereto. The response confirmation 34 from 1 is transmitted, and the state of communication 15 is established. Thus, if the present invention is used also 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 has been described as being provided in the communication network 50, but 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 checked simultaneously. That is, even if an incoming call or outgoing request from a legitimate mobile station is received by the communication control device, an incoming call or outgoing request from an illegal mobile station is received by the valid mobile station. It can be carried out.

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

[Brief description of the 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 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 in the embodiment of the present invention.

FIG. 5 is a time chart showing a calling 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 flowchart 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 reception 7, 7 'authentication request 8, 10 disconnection 9, 9' authentication response 12 calling 13, 33 response 14, 34 response confirmation 15 communicating 24, 24 ′ Outgoing request 25, 26 Outgoing reception 30 Communication control unit 32 Calling 34 Authentication confirmation control unit 36 Outgoing / incoming call control unit 40 Base station 50 Communication network

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Naoshi Ota 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (58) Fields investigated (Int. Cl. ⁷ , DB name) H04Q 7 / 00-7/38 H04B 7/24-7/26 102

Claims (5)

(57) [Claims] When a plurality of mobile stations respond to an incoming call request transmitted by a communication control apparatus within a predetermined time difference, the communication control apparatus once executes an incoming call reception for the plurality of mobile stations. Then, the communication control device sequentially transmits an authentication request to the plurality of mobile stations, and continues the call connection to the first mobile station that has made a correct authentication response to the authentication request. Mobile station selection method. 2. When a plurality of mobile stations transmit a transmission request within a predetermined time difference, a communication control device executes transmission reception once in response to a transmission request from the plurality of mobile stations, and the communication control device transmits the transmission request. A method of selecting a mobile station, comprising transmitting an authentication request to the plurality of mobile stations sequentially, and continuing call connection 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 the mobile station, a means for receiving an incoming call from the mobile station responding to the incoming request, a means for receiving an outgoing call request from the mobile station, Means for transmitting a call reception to the mobile station that has transmitted the call request, means for transmitting the authentication request to the reception of the call or the mobile station that has transmitted the call request, and valid authentication for the authentication request. Means for continuing the call connection to the mobile station responding to the request, wherein the means for transmitting the authentication request includes a plurality of n within a time difference t.
A communication control device comprising: means for transmitting an authentication request to all the mobile stations that have transmitted the plurality of n incoming call reception or transmission requests when the reception reception or transmission request is received. 4. The time difference t is a time difference from a time when a predetermined time has passed from a time when an incoming call request is transmitted.
The communication control device according to the above. 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 passed from a time when the first transmission request was received.