WO2014064910A1

WO2014064910A1 - Position information management apparatus, communication system having same, communication program of position information management apparatus, and communication method of position information management apparatus

Info

Publication number: WO2014064910A1
Application number: PCT/JP2013/006176
Authority: WO
Inventors: 鈴木　喬
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2012-10-22
Filing date: 2013-10-17
Publication date: 2014-05-01
Also published as: JP2014086823A; JP5756789B2

Abstract

The objective of the invention is to provide a position information management apparatus, a communication system having the same, a communication program of position information management apparatus and a communication method of position information management apparatus that can prevent the latitude and longitude information of a base station from leaking to a mobile terminal apparatus having executed a position determination request including a terminal identifier different from an authorized terminal identifier. A position information management apparatus comprises: a position determination request acquiring unit (7a) that acquires a position determination request including a terminal identifier of a mobile terminal apparatus (23) and a cell identifier; a cell information acquiring unit (5b) that acquires the cell information of a cell in which a mobile terminal apparatus, which has an terminal identifier that is the same as the terminal identifier included in the position determination request, is existent; an information difference determining unit (5c) that determines whether the difference between said cell information and cell information based on the cell identifier included in the position determination request exceeds a threshold value; and a position information transmitting unit (7c) that transmits assist data if it is determined that the difference does not exceed the threshold value.

Description

POSITION INFORMATION MANAGEMENT DEVICE, COMMUNICATION SYSTEM EQUIPPED WITH THE SAME, COMMUNICATION PROGRAM FOR POSITION INFORMATION MANAGEMENT DEVICE, COMMUNICATION METHOD FOR POSITION INFORMATION MANAGEMENT DEVICE

The present invention relates to a location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device, a communication system including the location information, a communication program for the location information management device, and a communication for the location information management device Regarding the method.

Patent Documents

1 and 2 disclose an apparatus and a method related to position positioning configured to transmit position information to the communication terminal as assist data during positioning calculation by the communication terminal. Also, in SUPL (Secure User Plane Location) defined by OMA (Open Mobile Alliance), if the terminal identifier of the mobile terminal device that requested the positioning is different from the regular identifier, In order to prevent transmission of erroneous assist data, MSISDN authentication using a RADIUS (Remote Authentication Dial In User Service) server, which is an IP (Internet Protocol) authentication device, is performed. *

JP 2012-18123 A JP 2010-532507 A

When a company such as a company direct-collection user has a RADIUS server, the company cannot use the RADIUS server, and the company side network (hereinafter, the network may be abbreviated as “NW”). The authentication processing of the mobile terminal device that has executed the SUPL positioning request cannot be executed. In addition, it is not realistic for a business operator to request an authentication process of a mobile terminal device from a company provided with a RADIUS server each time a SUPL positioning request is made. For this reason, a business operator that does not have a RADIUS server cannot perform MSISDN authentication of a mobile terminal device that has executed a SUPL positioning request. For this reason, the operator can make a SUPL positioning request regardless of whether the terminal identifier included in the SUPL positioning request is a regular identifier or whether the cell identifier included in the SUPL positioning request is a regular identifier. Assist data such as latitude / longitude information, which is position information of the base station, is transmitted to the mobile terminal apparatus. If the positioning request does not include a legitimate identifier, incorrect assist data is transmitted to the mobile terminal device that has requested SUPL positioning, or the mobile terminal that has intentionally changed the terminal identifier and requested the positioning There arises a problem that latitude / longitude information of the base station owned by the operator is leaked to the apparatus.

It is an object of the present invention to leak latitude / longitude information of a base station to a mobile terminal apparatus that has executed a positioning request including information indicating a serving cell different from information indicating a serving cell that should be currently located. It is an object of the present invention to provide a location information management device that can prevent this, a communication system including the same, a communication program for the location information management device, and a communication method for the location information management device.

A location information management device according to an aspect of the present invention is a location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device, and is transmitted from the mobile terminal device in a user plane, A positioning request acquisition unit that acquires a positioning request including a terminal identifier and a cell identifier of the mobile terminal device, and the positioning request acquisition unit associated with the terminal identifier of the mobile terminal device based on the acquisition of the positioning request A subscriber information storage unit that stores subscriber information; a subscriber information acquisition unit that acquires subscriber information associated with the same terminal identifier as the terminal identifier included in the positioning request; and the positioning request A cell information acquisition unit that acquires cell information of a serving cell in which a mobile terminal apparatus having the same terminal identifier as the terminal identifier included in the mobile station apparatus exists, the cell information, An information difference determination unit that determines whether or not a difference from cell information based on the cell identifier included in the positioning request exceeds a threshold; and the information difference determination unit for the mobile terminal device that has executed the positioning request However, when it is determined that the difference exceeds the threshold value, the assist data used for positioning is not transmitted, and when the information difference determination unit determines that the difference does not exceed the threshold value, the assist data And a position information transmission unit for transmitting. According to such a configuration, the latitude / longitude information of the base station for the mobile terminal device that has executed the positioning request including the information indicating the serving cell different from the information indicating the serving cell that should be currently located Can be prevented from leaking. Moreover, according to such a structure, it can prevent that the latitude longitude information of a base station leaks with respect to the mobile terminal device which performed the positioning request | requirement containing the terminal identifier different from a regular terminal identifier. In addition, according to such a configuration, even a communication carrier that cannot execute MSISDN authentication because it does not have a RADIUS server in its own network can execute positioning request authentication. Latitude and longitude information can be prevented from leaking.

Further, the cell information based on the cell identifier included in the positioning request includes the cell identifier itself included in the positioning request, and the information difference determination unit includes the cell information of the serving cell. It is possible to determine whether or not the cell identifier included in is identical to the cell identifier itself. According to such a configuration, it is possible to prevent the latitude / longitude information of the base station from leaking by a simple method of comparing two cell identifiers.
In addition, the location information management device is an SLP having the GMLC having the cell information acquisition unit, the subscriber information acquisition unit, and the information difference determination unit, the positioning request acquisition unit, and the location information transmission unit. And can have According to such a configuration, it is possible to prevent the latitude / longitude information of the base station from leaking only by adding a function to the GMLC or SLP generally used in the position information management apparatus.

Further, the location information management device further includes a base station information storage unit that stores a cell identifier of the base station and latitude / longitude information in association with each other, and the cell information based on the cell identifier included in the positioning request includes: The latitude / longitude information stored in the base station information storage unit is included, and the cell information of the serving cell includes the latitude / longitude information of the base station that accommodates the serving cell stored in the relay device. The information difference determination unit is acquired from the relay device, is acquired from the latitude / longitude information of the base station that accommodates the serving cell, and the base station information storage unit, and is included in the positioning request. The difference between the included cell identifier and the latitude / longitude information associated with the same cell identifier may be determined. According to such a configuration, it is possible to prevent the latitude / longitude information of the base station from leaking by a simple method of comparing two pieces of latitude / longitude information.

In addition, the location information management device includes a GMLC having the cell information acquisition unit, the subscriber information acquisition unit, an SLP having the information difference determination unit, the positioning request acquisition unit, and a location information transmission unit. Can have. According to such a configuration, it is possible to prevent the latitude / longitude information of the base station from leaking only by adding a function to the GMLC or SLP generally used in the position information management apparatus.
In addition, when subscriber information associated with the same terminal identifier as the terminal identifier included in the positioning request is not stored in the subscriber information storage unit, the location information transmission unit It is also possible not to transmit the assist data to the mobile terminal device that has executed. According to such a configuration, it is possible to prevent the latitude / longitude information of the base station from leaking to an unauthorized mobile terminal device that has not undergone registration authentication processing.

A communication system according to an aspect of the present invention stores a location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device, subscriber information, and the location information management device. And a subscriber information storage unit for transmitting and receiving the subscriber information, wherein the location information management device is the location information management device of the above aspect. According to such a configuration, the latitude / longitude information of the base station for the mobile terminal device that has executed the positioning request including the information indicating the serving cell different from the information indicating the serving cell that should be currently located Can be prevented from leaking. Moreover, according to such a structure, it can prevent that the latitude longitude information of a base station leaks with respect to the mobile terminal device which performed the positioning request | requirement containing the terminal identifier different from a regular terminal identifier. In addition, according to such a configuration, even a communication carrier that cannot execute MSISDN authentication because it does not have a RADIUS server in its own network can execute positioning request authentication. Latitude and longitude information can be prevented from leaking.

A communication program for a location information management device according to an aspect of the present invention is a communication program for a location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device. A positioning request acquisition unit that acquires a positioning request that is transmitted from a mobile terminal device in a user plane and includes a terminal identifier and a cell identifier of the mobile terminal device, and moves based on the fact that the positioning request acquisition unit acquires the positioning request. A subscriber information storage unit that stores subscriber information associated with a terminal identifier of the terminal device is referred to, and subscriber information associated with the same terminal identifier as the terminal identifier included in the positioning request is acquired. A subscriber information acquisition unit that relays cell information of a serving cell in which a mobile terminal device having the same terminal identifier as the terminal identifier included in the positioning request is located; A cell information acquisition unit that acquires the information, a cell information and an information difference determination unit that determines whether or not a difference between the cell information based on the cell identifier included in the positioning request exceeds a threshold, and the positioning request When the information difference determination unit determines that the difference exceeds the threshold value for the executed mobile terminal device, the information difference determination unit does not transmit assist data used for positioning, and the difference is determined by the information difference determination unit. When it is determined that the threshold value is not exceeded, the position data transmission unit functions as a position information transmission unit that transmits the assist data. According to such a configuration, the latitude / longitude information of the base station for the mobile terminal device that has executed the positioning request including the information indicating the serving cell different from the information indicating the serving cell that should be currently located Can be prevented from leaking. Moreover, according to such a structure, it can prevent that the latitude longitude information of a base station leaks with respect to the mobile terminal device which performed the positioning request | requirement containing the terminal identifier different from a regular terminal identifier. In addition, according to such a configuration, even a communication carrier that cannot execute MSISDN authentication because it does not have a RADIUS server in its own network can execute positioning request authentication. Latitude and longitude information can be prevented from leaking.

A communication method of a location information management device according to an aspect of the present invention is a communication method of a location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device. A positioning request that is transmitted in a plane and includes a terminal identifier and a cell identifier of the mobile terminal device is acquired, and subscriber information associated with the terminal identifier of the mobile terminal device is stored based on the acquisition of the positioning request To obtain subscriber information associated with the same terminal identifier as the terminal identifier included in the positioning request, and to acquire the same terminal identifier as the terminal identifier included in the positioning request. The cell information of the cell in which the mobile terminal device is located is obtained from the relay device, and the difference between the cell information and the cell information based on the cell identifier included in the positioning request Determining whether or not the threshold is exceeded, and transmitting the assist data used for positioning when the difference is determined to exceed the threshold to the mobile terminal device that has executed the positioning request, When it is determined that the difference does not exceed the threshold value, the assist data is transmitted. According to such a configuration, the latitude / longitude information of the base station for the mobile terminal device that has executed the positioning request including the information indicating the serving cell different from the information indicating the serving cell that should be currently located Can be prevented from leaking. Moreover, according to such a structure, it can prevent that the latitude longitude information of a base station leaks with respect to the mobile terminal device which performed the positioning request | requirement containing the terminal identifier different from a regular terminal identifier. In addition, according to such a configuration, even a communication carrier that cannot execute MSISDN authentication because it does not have a RADIUS server in its own network can execute positioning request authentication. Latitude and longitude information can be prevented from leaking.

According to the present invention, the latitude / longitude information of the base station is leaked to the mobile terminal device that has executed the positioning request including the information indicating the serving cell different from the information indicating the serving cell that should be currently located. Can be prevented.

1 is a block diagram showing a schematic configuration of a communication system 1 according to a first embodiment of the present invention. It is a block diagram which shows schematic structure of the positional information management apparatus 3 by the 1st Embodiment of this invention. It is a figure which shows an example of the database memorize | stored in the base station information DB apparatus 9 with which the positional information management apparatus 3 by the 1st Embodiment of this invention was equipped. It is FIG. (1) explaining the problem of the conventional communication system. It is FIG. (2) explaining the problem of the conventional communication system. It is FIG. (3) explaining the problem of the conventional communication system. It is a sequence diagram for demonstrating operation | movement of the positional infomation management apparatus 3 and the communication system 1 by the 1st Embodiment of this invention. It is a flowchart which shows the flow of the positioning request | requirement authentication process in the location information management apparatus 3 by the 1st Embodiment of this invention. It is a block diagram which shows schematic structure of the positional infomation management apparatus 53 by the 2nd Embodiment of this invention. It is a sequence diagram for demonstrating operation | movement of the positional infomation management apparatus 53 by the 2nd Embodiment of this invention, and a communication system. It is a flowchart which shows the flow of the positioning request | requirement authentication process in the location information management apparatus 53 by the 2nd Embodiment of this invention. It is a flowchart which shows the flow of the positioning request | requirement authentication process in the positional infomation management apparatus by the modification of the 2nd Embodiment of this invention.

[First Embodiment]
(Schematic configuration of the communication system 1)
A location information management device according to a first embodiment of the present invention, a communication system including the location information management device, and a communication method of the location information management device will be described with reference to FIGS. First, a schematic configuration of the communication system 1 according to the present embodiment will be described with reference to FIG.
FIG. 1 shows a schematic configuration of a communication system 1 according to the present embodiment. As shown in FIG. 1, the communication system 1 according to the present embodiment includes a location information management device 3, a subscriber management server (HSS) 11 connected to the location information management device 3, and location information management. A xGSN (serving / gateway general packet radio service support node) 13 connected to the apparatus 3, a radio network controller (Radio Network Controller: RNC) 15 connected to the xGSN 13, and a radio network controller (RNC) 15 connected to the RNC base 15 (BNC) Transceiver Station (BTS) 17, MME (Mobility Management Entity) 19 connected to location information management device 3, and MME 19 Radio base station (eNodeB) 21, and a mobile terminal device 23. In the present embodiment, the network is configured to include at least the location information management device 3, the HSS 11, the xGSN 13, the RNC 15, the BTS 17, the MME 19, and the eNodeB 21.

The BTS 17 forms a 3G (third generation mobile communication system) area (area cell) E1 by sending a cell identifier (for example, a cell ID) to a specific range. As shown in FIG. 1, when the mobile terminal device 23 is in the 3G coverage area E1, the BTS 17 can perform wireless communication with the mobile terminal device 23 according to the 3G method. The mobile terminal device 23 communicates with the RNC 15, the xGSN 13, and the location information management device 3 that are located upstream (upper) of the BTS 17 via the BTS 17. A cell identifier is assigned to each base station. For this reason, by determining the cell identifier, it is possible to distinguish in which base station the in-service area is accommodated.

The RNC 15 is provided corresponding to the BTS 17 and performs processing related to radio communication of the mobile terminal device 23 located in the 3G located area E1 formed by the BTS 17. Specifically, the RNC 15 performs a line connection process of the mobile terminal device 23, a handover process during a call, and the like. The RNC 15 also has a cell identifier of the BTS associated with itself (in this example, BTS 17) and a terminal identifier of the mobile terminal device located in the serving cell accommodated by the BTS (for example, the mobile phone NW). Is stored in association with a number (MSISDN) uniquely identifying the subscription to the network. In FIG. 1, one BTS and one mobile terminal apparatus are connected to the RNC 15, but the RNC 15 can control a plurality of mobile terminal apparatuses via a plurality of BTSs. The RNC may also be called a base station control device, a radio control station, or the like.

XGSN 13 is a core network device, which is an SGSN (Serving General packet radio service Support Node) (not shown) and an GGSN (Gateway General packet radio service Support Node), which is an integrated processing node that performs an exchange process. Specifically, for example, when the mobile terminal device 23 performs data communication such as browsing of a website or transmission / reception of an e-mail, the xGSN 13 receives IP (Internet Protocol) packets transmitted from the mobile terminal device 23 with respect to an IP (Internet Protocol) packet. Processing such as so-called encapsulation is performed to wrap the packet with another IP packet.

The eNodeB 21 is configured to form an LTE (Long Term Evolution) area (area cell) E2 by sending a cell identifier (for example, a cell ID) to a specific range. When the mobile terminal device is in the LTE coverage area E2, the eNodeB 21 can perform wireless communication according to the LTE scheme with the mobile terminal device. The mobile terminal device communicates with the MME 19 and the location information management device 3 that are located upstream (upstream) of the eNodeB 21 via the eNodeB 21. The eNodeB 21 has a wireless access control function. For this reason, unlike the BTS 17, the eNodeB 21 can be directly connected to the MME 19 that is one configuration of the LTE core network device.

The MME 19 constitutes a core network device together with PCRF (Policy and Charging Rules Function), PGW (Packet Data Network-Gateway), and SGW (Serving-Gateway) (all not shown). The MME 19 performs mobile terminal device mobility management, mobile terminal device authentication (security control) based on authentication information notified from the HSS 11, user data transfer path setting processing between the SGW and the eNodeB 21, and the like. ing.
The HSS 11 is a subscriber information storage unit (subscriber information database) that stores subscriber information associated with a terminal identifier of a mobile terminal device, and manages authentication information and location information. Further, as a response to the subscriber information acquisition request from the location information management device 3, the HSS 11 sends to the location information management device 3 subscriber information associated with the designated terminal identifier, that is, including the terminal identifier. (Details will be described later).

The location information management device 3 manages location information such as latitude and longitude information of the BTS 17 and the eNodeB 21 that transmit and receive data to and from the mobile terminal device 23. Although details will be described later, when the location information management device 3 satisfies a predetermined condition with respect to a base station positioning request from the mobile terminal device 23 (hereinafter sometimes simply referred to as a “positioning request”), the location information management device 3 The position information is transmitted to the mobile terminal device 23. The location information management device 3 may be abbreviated as “DB” as a base station information database (hereinafter referred to as “DB”), a GMLC (Gateway Mobile Location Center) 5, an SLP (SUPL (Secure User Plane Location) Location Platform) 7. ) Device 9. The GMLC 5, the SLP 7, and the base station information DB 9 may be respectively realized as physically separate devices, or may be realized as one function of the location information management device 3.

The GMLC 5 is a server device that performs a function of determining whether or not the mobile terminal device that has executed the positioning request matches the mobile terminal device corresponding to the terminal identifier included in the positioning request.
The SLP 7 is a server device that transmits assist data and the like by SUPL communication to the mobile terminal device that has executed the positioning request. The SUPL communication is a positioning type communication that transmits and receives a positioning signal between a mobile terminal device and a predetermined device using a user plane (U-Plane) that is a transmission path for transferring user data. The assist data is a set of parameters widely used in positioning by GPS (Global Positioning System), and corresponds to latitude / longitude and error radius in the present embodiment.
The base station information DB device 9 corresponds to a base station information storage unit that stores the cell identifier of the serving cell accommodated by the base station and the latitude / longitude information of the base station in association with each other. The base station information DB device 9 stores these data in a database. The base station information DB device 9 may be realized as a function of the SLP 7.

(Schematic configuration of the location information management device 3)
Next, a specific configuration of the location information management device 3 will be described with reference to FIGS. FIG. 2 is a block diagram illustrating a schematic configuration of the location information management device 3. In FIG. 2, for ease of understanding, the HSS 11, xGSN 13, RNC 15, and mobile terminal device 23 connected to the location information management device 3 are shown together, and the MME 19 and eNodeB 21 that are originally connected are omitted. .
As illustrated in FIG. 2, the GMLC 5 includes a subscriber information acquisition unit 5a, a cell information acquisition unit 5b, and an information difference determination unit 5c. The subscriber information acquisition unit 5a, the cell information acquisition unit 5b, and the information difference determination unit 5c may be realized as physically separate devices, or may be realized as one function of the GMLC 5, respectively.

The subscriber information acquisition unit 5a stores subscriber information associated with the terminal identifier of the mobile terminal device 23 based on the fact that a positioning request acquisition unit 7a described later acquires a base station positioning request transmitted by the user plane. The subscriber information associated with the same terminal identifier as the terminal identifier included in the positioning request is acquired by referring to the HSS (subscriber information storage unit) 11 that performs the search. The subscriber information includes a terminal identifier, a country code, an operator code (operator identifier), an SGSN Number for specifying xGSN (hereinafter referred to as “SGSN number”) or a base station number for specifying an eNodeB, and A cell identifier (cell ID) or the like is included.

By the way, the HSS 11 stores the terminal identifier of the mobile terminal device and the cell identifier of the visited cell in association with each other based on a registration request executed when the mobile terminal device moves, for example, in the visited cell. . Since the terminal identifier and the cell identifier included in the registration request are transmitted through a control plane (C-Plane) that is a transmission path of a control signal for establishing or disconnecting communication, these identifiers are normal values. It becomes. Therefore, the correspondence relationship between the terminal identifier and the cell identifier in the HSS 11 matches the correspondence relationship between the mobile terminal device of the terminal identifier and the serving cell in which the mobile terminal device is located. On the other hand, the data transmitted on the user plane can be changed. For this reason, when the mobile terminal apparatus executes a positioning request including a legitimate terminal identifier, the subscriber information acquisition unit 5a is provided with a base station that accommodates the cell in which the mobile terminal apparatus is currently located. The SGSN number of the xGSN located at the upper level can be acquired. On the other hand, when the mobile terminal apparatus executes a positioning request including a terminal identifier that is different from the regular identifier, the subscriber information acquisition unit 5a selects the cell in which the mobile terminal apparatus is currently located. There are cases where the SGSN number of the xGSN located above the base station to be accommodated cannot be acquired.

The cell information acquisition unit 5b is configured to acquire cell information of a serving cell in which a mobile terminal device having the same terminal identifier as the terminal identifier included in the positioning request is located from the relay device. In the present embodiment, the cell information includes a cell identifier. Moreover, in this Embodiment, xGSN13, RNC15, MME19, and eNodeB21 (refer FIG. 1) are equivalent to the said relay apparatus. The cell information acquisition unit 5b receives from either the RNC 15 or the eNodeB 21 based on the base station information of the SGSN number included in the subscriber information acquired by the subscriber information acquisition unit 5a and the terminal identifier included in the positioning request. Get cell information.

When the mobile terminal device makes a positioning request including the regular terminal identifier and the cell identifier of the currently located cell, it is included in the subscriber information acquired by the subscriber information acquisition unit 5a. The SGSN number matches the SGSN number of the xGSN located above the base station that accommodates the cell in which the mobile terminal device is currently located. For this reason, the cell information acquisition unit 5b obtains the cell identifier of the serving cell from the RNC that is located above the base station that accommodates the serving cell in which the mobile terminal device is currently located and is located below the xGSN. Can be obtained. The RNC 15 stores the cell identifier of the serving cell accommodated by the BTS 17 in association with the terminal identifier of the mobile terminal apparatus currently located in the serving cell (3G located area E1) accommodated by the BTS 17. Yes. As a result, the cell identifier included in the cell information matches the cell identifier included in the positioning request.

On the other hand, when the mobile terminal device makes a positioning request including a terminal identifier different from the regular terminal identifier and a cell identifier of the currently located cell or a cell identifier different from the cell identifier. The SGSN number included in the subscriber information acquired by the subscriber information acquisition unit 5a is the SGSN number of the xGSN located above the base station that accommodates the cell in which the mobile terminal device is currently located. May not match. If the two SGSN numbers do not match, the cell information acquisition unit 5b starts from the RNC located above the base station that accommodates the cell in which the mobile terminal device is currently located and below the xGSN. The cell identifier of the serving cell cannot be acquired. As a result, the cell identifier included in the cell information does not match the cell identifier included in the positioning request.

The information difference determination unit 5c determines whether or not the difference between the cell information acquired by the cell information acquisition unit 5b and the cell information based on the cell identifier included in the positioning request exceeds a threshold value. The cell information based on the cell identifier included in the positioning request in the present embodiment includes the cell identifier itself included in the positioning request. The information difference determination unit 5c in the present embodiment determines whether the cell identifier acquired by the cell information acquisition unit 5b and included in the cell information of the serving cell is the same as the cell identifier itself. ing. When both cell identifiers are the same, the information difference determination unit 5c has a difference between the cell information acquired by the cell information acquisition unit 5b and the cell information based on the cell identifier included in the positioning request does not exceed the threshold value. If the identifiers are not the same, it is determined that the difference between the cell information acquired by the cell information acquisition unit 5b and the cell information based on the cell identifier included in the positioning request exceeds the threshold. Thus, in this Embodiment, it can prevent that the latitude longitude information of a base station leaks with the simple method of comparing two cell identifiers.

When the mobile terminal device makes a positioning request including a legitimate terminal identifier and the cell identifier of the currently located cell, the cell identifier included in the cell information is the cell included in the positioning request. Since it matches the identifier, the information difference determination unit 5c determines that both cell identifiers are the same and do not exceed the threshold. On the other hand, when the mobile terminal device makes a positioning request including a terminal identifier different from the regular terminal identifier and a cell identifier of the currently located cell or a cell identifier different from the cell identifier. The cell identifier included in the cell information may not match the cell identifier included in the positioning request. In this case, the information difference determination unit 5c determines that both cell identifiers are not the same and exceed the threshold value.

The SLP 7 includes a positioning request acquisition unit 7a, a latitude / longitude acquisition unit 7b, and a position information transmission unit 7c. The positioning request acquisition unit 7a, the latitude / longitude acquisition unit 7b, and the position information transmission unit 7c may be realized as physically separate devices, or may be realized as a function of the SLP 7, respectively.
The positioning request acquisition unit 7a is configured to acquire a positioning request including a terminal identifier and a cell identifier of the mobile terminal device transmitted from the mobile terminal device on the user plane. Further, the positioning request acquisition unit 7a executes a subscriber information acquisition request to the GMLC 5 in order to prompt the subscriber information acquisition unit 5a to acquire the subscriber information from the HSS 11.
In the latitude / longitude acquisition unit 7b, the information difference determination unit 5c determines that the difference between the cell information acquired by the cell information acquisition unit 5b and the cell information based on the cell identifier included in the positioning request does not exceed the threshold, and performs positioning. If the authentication of the request is successful, the latitude and longitude information associated with the matched cell identifier and the country code included in the subscriber information acquired from the HSS 11 is acquired from the base station information DB device 9.

If the information difference determination unit 5c determines that the difference exceeds the threshold, the position information transmission unit 7c does not transmit assist data used for positioning, and the information difference is determined. When the determination unit 5c determines that the difference does not exceed the threshold value, the assist data is transmitted. When the information difference determination signal including information indicating that the threshold value is not exceeded is transmitted from the GMLC 5, the position information transmission unit 7c transmits assist data to the mobile terminal device that has performed the positioning request, and exceeds the threshold value. When the information difference determination signal including the information indicating that the positioning request is received is transmitted from the GMLC 5, data including information indicating that the positioning request authentication has failed is transmitted instead of the assist data. The location information transmission unit 7c transmits the latitude / longitude information acquired from the base station information DB device 9 by the latitude / longitude acquisition unit 7b to the mobile terminal device as assist data.

When the subscriber information associated with the same terminal identifier as the terminal identifier included in the positioning request is not stored in the HSS 11, the location information transmitting unit 7c sends the information to the mobile terminal device that has executed the positioning request. The assist data is not transmitted. When the HSS 11 determines that it does not store the same terminal identifier as the terminal identifier included in the subscriber information acquisition request from the subscriber information acquisition unit 5a, it sends a response signal indicating that the terminal identifier is not stored. It transmits to the subscriber information acquisition part 5a. The GMLC 5 that has received the response signal transfers the response signal to the SLP 7. SLP7 which received the said response signal transmits the data containing the information which shows that the positioning request | requirement authentication failed instead of assist data with respect to the mobile terminal device which performed the positioning request | requirement via the positional information transmission part 7c.

FIG. 3 shows an example of a database stored in the base station information DB device 9. As shown in FIG. 3, the database includes 8 items of “country code”, “operator code”, “cell ID”, “latitude”, “longitude”, “error radius”, “altitude”, and “altitude error”. Information on items. “Country code” indicates the code of the country in which the base station exists, “Operator code” indicates the code of the telecommunications carrier that manages and operates the base station, and “Cell ID” is accommodated by the base station The “latitude” indicates the latitude at which the base station is located, the “longitude” indicates the longitude at which the base station is located, the “error radius” is “latitude” and Shows the radius of the area where the base station is assumed to be centered on "Longitude", "Altitude" shows the altitude where the base station is located, and "Altitude error" assumes that the base station is located around "Altitude" The range of the height direction is shown. As shown in the second column of the database, a base station corresponding to “Country code” “440”, “Operator code” “101”, and “Cell ID” “615” has “Latitude” “ 54.xxx × ”(“ xxx ”represents an illegitimate character, hereinafter the same),“ longitude ”is“ 82.xxx ° ”, and“ error radius ”is“ 60 ”. ”,“ Altitude ”is“ 320 m ”, and“ Altitude error ”is“ 5 m ”. The numerical value of “error radius” is a K value obtained by a predetermined conversion formula. As shown in the second and third columns of the database, even if the “cell ID” value is the same, the “country code” value may be different. Although not shown in the figure, the value of “operator code” may be different even if the value of “cell ID” is the same. Therefore, the information difference determination unit 5c determines not only the cell identifier (cell ID) but also the difference between the country code and the operator code (details will be described later). Note that the database shown in FIG. 3 is an example, and the database held in the base station information DB apparatus 9 may have other items associated with these items.

(Communication method of location information management device)
Next, a location information management apparatus according to this embodiment and a communication method of a communication system including the position information management apparatus will be described with reference to FIGS. 4 to 8 with reference to FIGS. Before describing the position information management apparatus according to the present embodiment and the communication method of a communication system including the position information management apparatus, problems in the conventional communication system will be described with reference to FIGS.
FIG. 4 shows a schematic configuration of a conventional communication system 100 in which a provider authentication network (home NW) includes a RADIUS (Remote Authentication Dial In User Service) server 131 as an authentication server. As illustrated in FIG. 4, the communication system 100 is connected to the RADIUS server 131, the GMLC 105 that is connected to the RADIUS server 131 and executes authentication processing with the RADIUS server 131, the SLP 107 that is connected to the GMLC 105, and the GMLC. XGSN 113, RNC 115 connected to xGSN 113, and mobile terminal device 123. Since the xGSN 113 and the RNC 115 have the same configuration as the xGSN 13 and the RNC 15 provided in the communication system 1 according to the present embodiment and perform the same functions, detailed description thereof is omitted. The GMLC 105 and the SLP 107 do not have the location information transmission unit 7c except that the GMLC 105 does not have the subscriber information acquisition unit 5a, the cell information acquisition unit 5b, and the information difference determination unit 5c. Except for this, since it has the same configuration as the SLP 7 and performs the same function, a detailed description is omitted.

The RADIUS server 131 has a function of paying out an IP address as a mobile device address in response to an access request from the mobile terminal device 123. This access request includes a terminal identifier (for example, MSISDN), a user ID, a password, and the like input at the mobile terminal device 123. The RADIUS server 131 verifies the mobile terminal device based on the terminal identifier and the password, and returns a response signal (an access permission signal (for example, an IP address) or an access permission signal) according to the verification result. The RADIUS server 131 stores the terminal identifier of the mobile terminal device 123 and the IP address transmitted to the mobile terminal device 123 in association with each other. Since the access request and response from the mobile terminal device 123 are transmitted on the control plane, the terminal identifier included in the access request and the IP address included in the response signal are regular values. For this reason, the RADIUS server 131 stores the legitimate terminal identifier of the mobile terminal apparatus 123 and the legitimate IP address set in the mobile terminal apparatus 123.

For example, when the SLP 107 receives a SUPL positioning request from the mobile terminal device 123, the SLP 107 executes a positioning request authentication request to the GMLC 105. The SLP 107 transmits, to the GMLC 105, the terminal identifier transmitted from the mobile terminal device 123 at the time of the authentication request and transmitted by the user plane included in the SUPL positioning request, and the IP address of the mobile terminal device 123 transmitted by the control plane. Send. The GMLC 105 executes an authentication request including the IP address to the RADIUS server 131. The RADIUS server 131 executes an authentication response including a terminal identifier associated with the IP address to the GMLC 105. The GMLC 105 determines whether or not there is a difference between the terminal identifier transmitted from the RADIUS server 131 and the terminal identifier transmitted from the SLP 107.

By the way, unlike the data transmitted on the control plane, the data transmitted on the user plane can be changed by rewriting the data by a user such as a mobile terminal device. Further, the terminal identifier included in the SUPL positioning request is transmitted on the user plane. For this reason, the user of the mobile terminal device can change the terminal identifier included in the SUPL positioning request. For example, it is assumed that a terminal identifier different from the regular terminal identifier is included in the SUPL positioning request from the mobile terminal device 123. The mobile terminal device 123 executes a SUPL positioning request including a terminal identifier different from the regular terminal identifier, and transmits a regular IP address to the SLP 107. Since the RADIUS server 131 stores the regular terminal identifier and the regular IP address in association with each other, when the authentication request including the regular IP address is acquired, the RADIUS server 131 transmits the regular terminal identifier to the GMLC 105. Since the terminal identifier transmitted from the SLP 107 is different from the terminal identifier transmitted from the RADIUS server 131, the GMLC 105 determines that there is a difference between the two terminal identifiers, and a response indicating that the SUPL positioning request authentication has failed. The signal is output to the SLP 107. As described above, the communication system 100 including the RADIUS server 131 allows the GMLC 105 to be displayed as indicated by a cross in FIG. 4 even when a SUPL positioning request including a terminal identifier different from the regular terminal identifier is executed from the mobile terminal device. Thus, it is possible to prevent the base station (not shown) from acquiring the location information acquisition request from the xGSN 113. Thereby, the communication system 100 can prevent the location information of the base station from leaking to the mobile terminal device 123 that has made a SUPL positioning request including a terminal identifier different from the regular terminal identifier.

FIG. 5 shows a schematic configuration of a communication system 200 as another conventional communication system. The communication system 200 has the same configuration as that of the communication system 100 except that a RADIUS server 131 such as a directly-acquired user is provided in the company NW. The RADIUS server 131 is the same as the communication system 100 in that an IP address is issued and stored in response to an access request from the mobile terminal device 123. Since the communication system 200 does not include the RADIUS server 131, it does not store information that associates the regular terminal identifier of the mobile terminal device 123 with the regular IP address after the access request process is completed. For this reason, in order to execute the authentication process for the SUPL positioning request from the mobile terminal device 123, the communication system 200 must request the enterprise side NW provided with the RADIUS server 131 to transmit a legitimate terminal identifier. However, it is not practical to execute a terminal identifier transmission request to the enterprise side NW every time a SUPL positioning request is received in consideration of the influence and load on the enterprise side NW.

Therefore, in the communication system 200, based on the cell identifier (cell ID) included in the SUPL positioning request, the latitude / longitude is calculated by referring to the base station information DB device 109 that holds the position information of the base station. Information is transmitted to the mobile terminal device 123. As shown in FIG. 5, the base station information DB device 109 has a database 109a in which cell IDs are associated with latitudes and longitudes. For this reason, the communication system 200 can calculate the latitude and longitude of a base station (not shown) based on the cell identifier included in the SUPL positioning request.

FIG. 6 is a diagram illustrating a problem when the communication system 200 responds to a SUPL positioning request based on a cell identifier. Since the cell identifier included in the SUPL positioning request is transmitted through the user plane in the same manner as the terminal identifier, the user terminal identifier of the mobile terminal device 123 is incorrectly set or changed intentionally, It may be different from the regular cell identifier of the cell in which the mobile terminal device 123 is located. As illustrated in FIG. 6, a SUPL positioning request in which a combination of a terminal identifier and a cell identifier is different may be repeatedly executed from the mobile terminal device 123. In FIG. 6, different terminal identifiers are represented by MSISDNα, β, and γ, and different cell identifiers are represented by

cell IDs

2, 3, and 4. Since the communication system 200 cannot determine whether the terminal identifier included in the SUPL positioning request is a regular terminal identifier, the communication system 200 cannot determine whether the SUPL positioning request is a continuous positioning request from the same mobile terminal device. . The communication system 200 cannot take defensive measures when the same mobile terminal apparatus executes a SUPL positioning request in a short time. Therefore, the communication system 200 sets the cell identifier included in the request to the mobile terminal apparatus that has executed the SUPL positioning request regardless of whether the terminal identifier or the cell identifier included in the SUPL positioning request is a regular identifier. The position information of the corresponding base station is transmitted. As a result, the communication system 200 has a problem that accurate latitude / longitude information of the base station held by the communication carrier managing the communication system 200 is leaked. For example, “35. ×” of the item “latitude” associated with “2” of the item “cell ID” from the database 109a stored in the base station information DB device 109 by a SUPL positioning request including MSISDNα and cell ID2. “139” and “139.xxx” of the item “Longitude” are leaked, and the item associated with “4” of the item “Cell ID” from the database 109a by the SUPL positioning request including MSISDNβ and Cell ID3. “35.xxx” of “latitude” and “139.xxx” of item “longitude” are leaked, and “4” of item “cell ID” is retrieved from the database 109a by a SUPL positioning request including MSISDNγ and cell ID4. "35.xxx" of the item "latitude" and "139.xxx" of the item "longitude" associated with "."

On the other hand, the location information management device 3 and the communication system 1 including the location information management device 3 according to the present embodiment do not include a RADIUS server, but the subscriber information acquisition unit 5a, the cell information acquisition unit 5b, and the information difference determination unit 5c. If the terminal identifier included in the SUPL positioning request is not a regular identifier, the assist that is the position information of the base station is provided to the mobile terminal apparatus that has executed the SUPL positioning request. It is possible to prevent data transmission.

Next, the communication method of the location information management device 3 and the communication system 1 including the same according to the present embodiment will be described with reference to FIGS. 7 and 8 with reference to FIGS. FIG. 7 is a sequence diagram showing operations of the location information management device 3 and the communication system 1 including the same. In FIG. 7, the mobile terminal device 23, RNC 15, xGSN 13, SLP 7, base station information DB device 9, GMLC 5, and HSS 11 are shown among the components of the communication system 1. FIG. 8 is a flowchart showing the flow of the positioning request authentication process of the location information management device 3.

As shown in FIG. 7, the SLP 7 receives an A-GNSS (Global Navigation Satellite Systems) positioning request from the mobile terminal device 23 (step S1). The SUPL positioning request is an example of an A-GNSS positioning request. In this A-GNSS positioning request, the MSISDN as the terminal identifier, the cell ID that is the cell identifier of the serving cell, the country code, and the operator code (in FIG. 7 and FIG. For convenience of explanation, the cell ID is referred to as “cell ID α”, the country code is referred to as “country code α”, and the operator code is referred to as “operator code α”).

As described above, when receiving the A-GNSS positioning request, the location information management device 3 starts the positioning request authentication process, and first acquires the MSISDN, the cell ID α, the country code α, and the operator code α, and is not shown. These pieces of information are stored in the storage unit (see step S51 shown in FIG. 8).
SLP7 which acquired the said positioning request | requirement by the positioning request | requirement acquisition part 7a performs a subscriber information acquisition request with respect to GMLC5 (step S2). The subscriber information acquisition request includes the MSISDN transmitted from the mobile terminal device 23.

Next, the GMLC 5 transfers the subscriber information acquisition request to the HSS 11 (step S3).
Next, the HSS 11 that has received the subscriber information acquisition request extracts the subscriber information stored in association with the MSISDN from the database, and sends a subscriber information acquisition response including the subscriber information to the subscriber information of the GMLC 5. It transmits to the acquisition part 5a (step S4). The subscriber information transmitted to the GMLC 5 includes a country code and an operator code (in FIG. 7 and FIG. 8, for convenience of explanation, the country code is referred to as “country code β”, and the operator code is indicated as “provider code β”. And SGSN number). On the other hand, when the same terminal identifier as MSISDN is not stored in the database, the HSS 11 transmits a response signal indicating that the MSISDN is not stored to the subscriber information acquisition unit 5a of the GMLC 5.
Thus, by receiving the subscriber information acquisition response in the subscriber information acquisition unit 5a, the location information management device 3 receives the SGSN number, the country code β, and the operator code β as subscriber information via the GMLC 5. Obtain (step S52 shown in FIG. 8).

GMLC5 which received the subscriber information acquisition response performs a cell ID acquisition request with respect to xGSN of the SGSN number contained in subscriber information. In this example, it is assumed that the SGSN number of xGSN13 is included in the subscriber information. Therefore, the GMLC 5 executes a cell ID acquisition request to the xGSN 13 (Step S5).
The xGSN 13 that has acquired the cell ID acquisition request transfers the cell ID acquisition request to the lower RNC 15 (step S6).

The RNC 15 stores the terminal identifier of the mobile terminal apparatus currently located in the serving cell in association with the cell identifier of the serving cell accommodated by the base station located at the lower level. For this reason, when the RNC 15 stores the cell identifier of the serving cell in which the mobile terminal device having the same terminal identifier as the MSISDN is located, the serving cell in which the mobile terminal device is located Is acquired as cell information of the serving cell. In this example, the RNC 15 includes a cell identifier of the cell in which the mobile terminal device having the same terminal identifier as the MSISDN is located (referred to as “cell ID β” in FIGS. 7 and 8 for convenience). Information is acquired (step S7), and a cell ID response is executed to the xGSN 13 (step S8). The cell ID response includes the acquired cell ID β. The xGSN 13 transfers the cell ID response to the GMLC 5 (Step S9). The GMLC 5 acquires the cell ID response in the cell information acquisition unit 5b.
As described above, the GMLC 5 uses the SGSN number included in the subscriber information, the cell ID including the terminal identifier (MSISDN in this example) included in the A-GNSS positioning request to the xGSN 13 of the SGSN number. The acquisition request is executed, and the cell information of the cell identifier (cell ID β in this example) is acquired from the relay apparatus (RNC 15 in this example) (step S53 shown in FIG. 8).

The GMLC 5 that has acquired the cell information including the cell ID β includes the country code α, the operator code α and the cell ID α included in the positioning request, and the country code β and the operator code β included in the subscriber information acquired from the HSS 11. And the cell ID β acquired from the RNC 15 is transmitted to the information difference determination unit 5c. The information difference determination unit 5c is included in the difference between the country code α and the country code β, the difference between the provider code α and the provider code β, and cell ID α (cell information based on the cell identifier included in the positioning request). Whether or not the difference between the cell identifier itself included in the positioning request) and the cell ID β (an example of the cell identifier included in the cell information of the serving cell) exceeds a preset threshold value. To do. In the present embodiment, the information difference determination unit 5c determines whether or not the codes to be compared match each other. If they match, the information difference determination unit 5c determines that the codes do not exceed the threshold value. Is determined to exceed the threshold (step S10 shown in FIG. 7 and step S54 shown in FIG. 8).

If the MSISDN included in the positioning request is a regular terminal identifier of the mobile terminal device 23, and the cell ID α included in the positioning request is a cell identifier of a serving cell in which the mobile terminal device 23 is currently located. Since the country code α and the country code β match, the operator code α and the operator code β match, the cell ID α and the cell ID β match, and all the codes match (step S54). ), The GMLC 5 transmits a signal indicating the successful authentication of the positioning request to the SLP 7 (step S13 shown in FIG. 7).

SLP7 which received the said signal performs the latitude longitude acquisition request with respect to the base station information DB apparatus 9 (step S14). The latitude / longitude acquisition request includes the country code, the operator code, and the cell ID that are determined to be matched by the information difference determination unit 5c.
The base station information DB device 9 extracts base station latitude / longitude information corresponding to the country code, operator code and cell ID included in the latitude / longitude acquisition request from the database, and includes latitude / longitude including the base station latitude / longitude information. A response is executed to SLP7 (step S15).

The SLP 7 that has acquired the latitude / longitude response transmits the base station latitude / longitude information to the mobile terminal device 23 as assist data via the position information transmission unit 7c (step S16). In this way, the SLP 7 acquires assist data (base station latitude / longitude information) associated with the cell ID determined to be matched by the information difference determination unit 5c from the base station information DB device 9, and the position information transmission unit 7c. The assist data is transmitted to the mobile terminal device 23 that has executed the positioning request via (step S55 shown in FIG. 8). The position information management device 3 ends the positioning request authentication process when step S55 ends.

As shown in FIG. 7, the mobile terminal apparatus 23 that has acquired the assist data executes A-GNSS positioning (step S17).
On the other hand, if the MSISDN included in the positioning request is different from the regular terminal identifier of the mobile terminal device 23, at least the cell ID α and the cell ID β do not match and all the codes do not match (in step S54). No), the GMLC 5 transmits a signal indicating a positioning request authentication failure to the SLP 7 (step S11 shown in FIG. 7).
The SLP 7 that has received the signal indicating the positioning request authentication failure transfers the information data indicating the positioning request authentication failure to the mobile terminal device 23 via the position information transmitting unit 7c without transmitting the assist data (step shown in FIG. 7). S12, step S56 shown in FIG. The position information management device 3 ends the positioning request authentication process when step S56 ends.

As described above, according to the location information management device 3, the communication system 1 including the location information management device 3, the communication method of the location information management device 3, and the communication method of the communication system 1 are presently located. It is possible to prevent the latitude / longitude information of the base station from leaking to the mobile terminal apparatus that has executed the positioning request including the information indicating the serving cell different from the information indicating the supposed serving cell. Moreover, according to this Embodiment, it can prevent that the latitude longitude information of a base station leaks with respect to the mobile terminal device which performed the positioning request | requirement containing a terminal identifier different from a regular terminal identifier. Also, even if the communication carrier cannot execute MSISDN authentication because it does not have a RADIUS server in its own network, it can execute positioning request authentication, so that the latitude and longitude information of the base station is leaked. Can be prevented.

[Second Embodiment]
(Schematic configuration of location information management device)
Next, a location information management device according to a second embodiment of the present invention, a communication system including the same, and a communication method of the location information management device will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the component which show | plays the same function and effect | action as the location information management apparatus 3 by said 1st Embodiment, and the communication system 1 provided with the same, and the description is abbreviate | omitted. The communication system according to the present embodiment has the same configuration as that of the communication system 1 according to the first embodiment except that the configuration of the location information management device is different, and exhibits the same functions. The detailed explanation is omitted.
First, a schematic configuration of the position information management device 53 according to the present embodiment will be described with reference to FIG. FIG. 9 is a block diagram illustrating a schematic configuration of the location information management device 53. In FIG. 9, for ease of understanding, the HSS 11, xGSN 13, RNC 15, and mobile terminal device 23 connected to the location information management device 3 are shown together, and the MME 19 and eNodeB 21 that are originally connected are omitted. Yes.

As shown in FIG. 9, the location information management device 53 according to the present embodiment includes a GMLC 55, an SLP 57, and a base station information DB device 9. The GMLC 55 includes a subscriber information acquisition unit 5a and a cell information acquisition unit 5b. The subscriber information acquisition unit 5a and the cell information acquisition unit 5b may be realized as physically separate devices, or may be realized as one function of the GMLC 55, respectively. The SLP 57 includes a positioning request acquisition unit 7a, a latitude / longitude acquisition unit 7b, a position information transmission unit 7c, and an information difference determination unit 57a. The positioning request acquisition unit 7a, the latitude / longitude acquisition unit 7b, the position information transmission unit 7c, and the information difference determination unit 57a may each be realized as physically separate devices, or may be realized as one function of the SLP 57. May be.
The information difference determination unit 57a is different from the first embodiment except for the point provided in the SLP 57 instead of the GMLC 55 and the point of determining whether or not the difference between the two latitude / longitude information exceeds the threshold value. The information difference determination unit 5c in FIG. 5 has the same configuration and exhibits the same function, so detailed description thereof will be omitted.

Next, operations of the location information management device 53 according to the present embodiment and a communication system including the location information management device 53 will be described with reference to FIG. 9 and FIG. FIG. 10 is a sequence diagram showing operations of the position information management device 53 and a communication system including the same. In FIG. 10, among the components of the communication system, the mobile terminal device 23, the RNC 15, the xGSN 13, the SLP 57, the base station information DB device 9, the GMLC 55, and the HSS 11 are shown. FIG. 11 is a flowchart showing the flow of the positioning request authentication process of the location information management device 3.
The operations from step S101 to step S104 shown in FIG. 10 of the location information management device 53 and the communication system having the same according to the present embodiment include the location information management device 3 and the location information management device 3 according to the first embodiment. Since it is the same as the operation from step S1 to step S4 shown in FIG. Further, the processing of steps S151 and S152 shown in FIG. 11 of the positioning request authentication process of the location information management device 53 according to the present embodiment is a diagram of the positioning request authentication processing of the location information management device 3 according to the first embodiment. Since this is the same as the processing of steps S51 and S52 shown in FIG.

As illustrated in FIG. 10, the GMLC 55 that has acquired the subscriber information acquisition response transmits a base station positioning request including the MSISDN to the xGSN of the SGSN number included in the subscriber information acquisition response (step S105). In this example, it is assumed that the GMLC 55 has received the SGSN number of xGSN13.
The xGSN 13 that has acquired the base station positioning request transfers the base station positioning request to the lower RNC 15 (step S106).

The RNC 15 stores the terminal identifier of the mobile terminal apparatus currently located in the serving cell and the serving cell in association with the cell identifier of the serving cell accommodated by the base station located at the lower level. The latitude and longitude information of the base station is stored. For this reason, when the RNC 15 stores the cell identifier of the serving cell in which the mobile terminal device having the same terminal identifier as the MSISDN is located, the serving cell in which the mobile terminal device is located The latitude and longitude information of the base station that accommodates is acquired as the cell information of the serving cell. On the other hand, if the RNC 15 does not store the cell identifier of the cell in which the mobile terminal device is located, the RNC 15 stores the cell identifier of the cell in which the mobile terminal device is located. Information indicating the absence is acquired as cell information of the serving cell. In this example, the RNC 15 has latitude / longitude information of a base station that accommodates a cell in which the mobile terminal device having the same terminal identifier as that of the MSISDN is located (in FIG. 10 and FIG. (Latitude / longitude X) and error radius (referred to as “error radius Y”) are acquired (step S107), and a base station positioning response is executed to the xGSN 13 (step S108). The acquired latitude / longitude X and error radius Y are included in the cell information of the serving cell. The base station positioning response includes the acquired latitude / longitude X and error radius Y. The xGSN 13 transfers the base station positioning response to the GMLC 55 (step S109). The GMLC 55 acquires the base station positioning response using the cell information acquisition unit 5b.

As described above, the GMLC 55 determines the terminal identifier (MSISDN in this example) included in the positioning request from the mobile terminal device 23 for the xGSN 13 of the SGSN number based on the SGSN number included in the subscriber information. The base station positioning request is executed, and cell information of latitude / longitude information (latitude / longitude X and error radius Y in this example) is acquired from the relay apparatus (RNC 15 in this example) (step S153 shown in FIG. 11).
The GMLC 55 that has acquired the base station positioning response transfers the base station positioning response to the SLP 57. Since the MSISDN included in the A-GNSS positioning request may be different from the regular terminal identifier, the SLP 57 transmits the latitude / longitude information acquired based on the MSISDN to the mobile terminal device 23 as assist data. I can't. For this reason, the location information management device 53 obtains the latitude and longitude information used to determine whether or not the MSISDN included in the A-GNSS request is a regular terminal identifier of the mobile terminal device 23. A latitude / longitude acquisition request is executed to the station information DB device 9 (step S111). The latitude / longitude acquisition request includes the country code α, the operator code α, and the cell ID α included in the A-GNSS positioning request.

The base station information DB device 9 receives the base station latitude / longitude information corresponding to the country code α, the operator code α, and the cell ID α included in the latitude / longitude acquisition request (in FIG. 10 and FIG. Is called “latitude / longitude X ′” and the error radius is called “error radius Y ′”), and the latitude / longitude response including the base station latitude / longitude information is executed to the SLP 57 (step S112). . The latitude / longitude X ′ and the error radius Y ′ are included in the cell information based on the cell identifier included in the positioning request.

The SLP 57 that has acquired the latitude / longitude response including the latitude / longitude X ′ and the error radius Y ′ obtains the latitude / longitude X acquired from the RNC 15 (the location cell stored in the relay device included in the cell information of the location cell). An example of latitude and longitude information of the base station to be accommodated, and latitude and longitude X ′ acquired from the base station information DB device 9 (included in the cell information based on the cell identifier included in the positioning request and stored in the base station information storage unit) It is determined whether or not the difference from the latitude / longitude information) exceeds a preset threshold value (step S113). In the present embodiment, the threshold is set to, for example, the radius of the area occupied by the serving cell, for example, 5 km. The information difference determination unit 57a determines that the absolute value of the value obtained by subtracting the latitude / longitude X ′ from the latitude / longitude X is equal to or less than the threshold value, and does not exceed the threshold value, and if the absolute value is longer than the threshold value, It is determined that the threshold value is exceeded (step S113 shown in FIG. 10 and step S155 shown in FIG. 11).

The MSISDN included in the A-GNSS positioning request is the normal terminal identifier of the mobile terminal device 23, and the cell ID α included in the positioning request is the cell of the cell in which the mobile terminal device 23 is currently located. In the case of an identifier, the latitude / longitude X and the latitude / longitude X ′ substantially coincide with each other, so the absolute value of the value obtained by subtracting the latitude / longitude X ′ from the latitude / longitude X is equal to or less than the threshold value. As a result, the SLP 57 transmits the latitude / longitude X ′ and the error radius Y ′ as assist data to the mobile terminal device 23 via the position information transmission unit 7c (step S115 and step S156 shown in FIG. 11). Thus, the SLP 57 uses the latitude / longitude X ′ and the error radius Y ′ extracted from the base station information DB device 9 as assist data. The position information management device 53 ends the positioning request authentication process when step S156 ends.
As shown in FIG. 10, the mobile terminal apparatus 23 that has acquired the assist data executes A-GNSS positioning (step S116).

On the other hand, if the MSISDN included in the positioning request is different from the regular terminal identifier of the mobile terminal device 23, the latitude / longitude X and the latitude / longitude X ′ may be completely different values. In this case, since the absolute value of the value obtained by subtracting the latitude / longitude X ′ from the latitude / longitude X is larger than the threshold value (in the case of “No” in step S155 shown in FIG. 11), the SLP 57 sends the A-GNSS positioning request. Without transmitting assist data to the executed mobile terminal device 23, data indicating information indicating a positioning request authentication failure is transmitted to the mobile terminal device 23 (step S114 shown in FIG. 10 and step S157 shown in FIG. 11). The position information management device 53 ends the positioning request authentication process when step S157 ends. Thus, in this Embodiment, it can prevent that the latitude longitude information of a base station leaks with the simple method of comparing two latitude longitude information.

As described above, according to the position information management device 53 according to the present embodiment, the communication system including the position information management device 53, the communication method of the position information management device 53, and the communication method of the communication system, It is possible to prevent the latitude / longitude information of the base station from leaking to the mobile terminal device that has executed the positioning request including the information indicating the serving cell different from the information indicating the serving cell. Moreover, according to this Embodiment, it can prevent that the latitude longitude information of a base station leaks with respect to the mobile terminal device which performed the positioning request | requirement containing a terminal identifier different from a regular terminal identifier. Also, even if the communication carrier cannot execute MSISDN authentication because it does not have a RADIUS server in its own network, it can execute positioning request authentication, so that the latitude and longitude information of the base station is leaked. Can be prevented.

(Modification)
Next, a location information management device according to a modification of the present embodiment and a communication system including the same will be described with reference to FIG. The position information management device according to this modification and the communication system including the position information management device 53 according to the present embodiment and the communication system including the position information management device 53 are different in the determination method in the information difference determination unit. Except for, it has the same configuration and performs the same function, so only the different points will be briefly described. FIG. 12 is a flowchart showing the flow of the positioning request authentication process of the location information management device according to this modification.

As shown in FIG. 12, the processing in steps S201 to S204, S206, and S207 in the positioning request authentication process of the location information management device according to the present modification is the same as steps S151 to S154 in the positioning request authentication processing of the location information management device 53. This is the same as the processing in S156 and S157 (see FIG. 11). The location information management device according to this modification is such that even if the mobile terminal device that has executed the positioning request is moving, or even if the serving cell of the mobile terminal device has changed immediately after executing the positioning request, the mobile terminal device If the movement distance is within the set range, the assist data can be transmitted. In this modification, an error radius included in the position information of the base station is used for the setting range. The setting range is a threshold used by the information difference determination unit for the difference determination.

The information difference determination unit of the location information management device according to this modification is used as a threshold value to be compared with the absolute value of the value obtained by subtracting the latitude / longitude X ′ acquired from the base station information DB device 9 from the latitude / longitude X acquired by the RNC 15. The added value obtained by adding the error radius Y acquired in the RNC 15 and the error radius Y ′ acquired from the base station information DB device 9 is used (step S205). If the information difference determination unit determines that the absolute value is equal to or less than the addition value and does not exceed the threshold value (Yes in step S205), the latitude / longitude X ′ and error as assist data to the mobile terminal device that has executed the positioning request. Send radius Y '. On the other hand, when the information difference determination unit determines that the absolute value is greater than the addition value and exceeds the threshold value (in the case of “No” in step S205), assist information is transmitted to the mobile terminal device that has executed the positioning request. Do not send.

As described above, according to the location information management device according to the present modification, the communication system including the location information, the communication method of the location information management device, and the communication method of the communication system, the location information management device 53 according to the present embodiment, The same effects as the communication system including the communication method, the communication method of the position information management device 53, and the communication method of the communication system can be obtained. Further, according to the communication method of the location information management device and the communication method of the communication system, for example, the mobile terminal device is moving, or the cell in which the mobile terminal device is located changes immediately after the positioning request. However, when the moving distance of the mobile terminal device is within the set range, the position information of the radio base station can be transmitted to the mobile terminal device. In addition, the position information management device according to this modification, the communication system including the position information communication device, the communication method of the position information management device, and the communication method of the communication system use an error radius calculated or acquired as a threshold value in the information difference determination unit. Therefore, it is not necessary to set the threshold value in advance, and the threshold value can be set when executing the information difference determination.

The present invention can be embodied as a computer program. For example, the function of each unit of the location

information management devices

3 and 53 can be realized as a communication program. Thus, some or all of the present invention can be incorporated into hardware or software (including firmware, resident software, microcode, state machines, gate arrays, etc.). Furthermore, the present invention may take the form of a computer program product on a computer-usable or computer-readable storage medium, which incorporates computer-usable or computer-readable program code. It is done. In the context of this specification, a computer usable or computer readable medium includes, stores, communicates, propagates, programs that are used by or in conjunction with an instruction execution system, apparatus or device, Alternatively, any medium that can be transported can be used.

The present invention is not limited to the above embodiment, and various modifications can be made.
In the first and second embodiments, the cell information of the serving cell has been described using the example of acquiring from the RNC 15. However, when the eNodeB base station number is included in the subscriber information, the GMLC Executes a cell ID acquisition request or a base station positioning request to the eNodeB.
The communication system according to the first and second embodiments does not include a RADIUS server. However, the communication method of the location information management apparatus according to the first and second embodiments includes a RADIUS server. It can also be applied to existing communication systems.
The scope of the present invention is not limited to the illustrated and described exemplary embodiments, but includes all embodiments that provide the same effects as those intended by the present invention. Furthermore, the scope of the invention is not limited to the combinations of features of the invention defined by the claims, but can be defined by any desired combination of particular features among all the disclosed features.

1, 100, 200

Communication system

3, 53 Location

information management device

5, 105 GMLC
5a Subscriber information acquisition unit 5b Cell

information acquisition unit

5c, 57a Information

difference determination unit

7, 107 SLP
7a Positioning request acquisition unit 7b Latitude / longitude acquisition unit 7c Position

information transmission unit

9, 109 Base station information DB device 11 HSS
13, 113 xGSN
15, 115 RNC
17 BTS
19 MME
21 eNodeB
23, 123 Mobile terminal device 109a Database 131 RADIUS server E1 3G area E2 LTE area

Claims

A location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device,
A positioning request acquisition unit that acquires a positioning request that is transmitted from a mobile terminal device in a user plane and includes a terminal identifier and a cell identifier of the mobile terminal device;
Based on the fact that the positioning request acquisition unit has acquired the positioning request, refer to a subscriber information storage unit that stores subscriber information associated with a terminal identifier of a mobile terminal device, and the positioning request is included in the positioning request. A subscriber information acquisition unit for acquiring subscriber information associated with the same terminal identifier as the terminal identifier;
A cell information acquisition unit for acquiring, from a relay device, cell information of a serving cell in which a mobile terminal device having the same terminal identifier as the terminal identifier included in the positioning request is located;
An information difference determination unit that determines whether or not a difference between the cell information and cell information based on the cell identifier included in the positioning request exceeds a threshold;
When the information difference determination unit determines that the difference exceeds the threshold value for the mobile terminal apparatus that has executed the positioning request, the information difference determination unit does not transmit assist data used for positioning. And a position information transmitting unit that transmits the assist data when it is determined that the difference does not exceed the threshold value.
The cell information based on the cell identifier included in the positioning request includes the cell identifier itself included in the positioning request,
The location information management device according to claim 1, wherein the information difference determination unit determines whether or not a cell identifier included in the cell information of the serving cell and the cell identifier itself are the same.
A GMLC having the cell information acquisition unit, the subscriber information acquisition unit, and the information difference determination unit;
The position information management device according to claim 1, further comprising: an SLP including the positioning request acquisition unit and the position information transmission unit.
A base station information storage unit that stores the cell identifier and latitude / longitude information of the base station in association with each other;
The cell information based on the cell identifier included in the positioning request includes the latitude / longitude information stored in the base station information storage unit, and the cell information of the serving cell includes the cell information. The stored latitude and longitude information of the base station that accommodates the serving cell is included,
The information difference determination unit is acquired from the relay device, and latitude and longitude information of the base station that accommodates the serving cell, the cell identifier acquired from the base station information storage unit and included in the positioning request, and The position information management device according to claim 1, wherein a difference from latitude / longitude information associated with the same cell identifier is determined.
A GMLC having the cell information acquisition unit and the subscriber information acquisition unit;
5. The position information management device according to claim 1, further comprising: an SLP including the information difference determination unit, the positioning request acquisition unit, and a position information transmission unit.
When the subscriber information associated with the same terminal identifier as the terminal identifier included in the positioning request is not stored in the subscriber information storage unit, the location information transmission unit executes the positioning request The position information management device according to any one of claims 1 to 5, wherein the assist data is not transmitted to the mobile terminal device.
A location information management device that manages location information of a base station that transmits / receives data to / from a mobile terminal device, and a subscriber that stores subscriber information and transmits / receives the subscriber information to / from the location information management device A communication system having an information storage unit,
The communication system according to any one of claims 1 to 6, wherein the location information management device is the location information management device according to any one of claims 1 to 6.
A communication program for a location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device,
Computer
A positioning request acquisition unit that acquires a positioning request that is transmitted from a mobile terminal device in a user plane and includes a terminal identifier and a cell identifier of the mobile terminal device;
Based on the fact that the positioning request acquisition unit has acquired the positioning request, refer to a subscriber information storage unit that stores subscriber information associated with a terminal identifier of a mobile terminal device, and the positioning request is included in the positioning request. A subscriber information acquisition unit for acquiring subscriber information associated with the same terminal identifier as the terminal identifier;
A cell information acquisition unit for acquiring, from a relay device, cell information of a serving cell in which a mobile terminal device having the same terminal identifier as the terminal identifier included in the positioning request is located;
An information difference determination unit that determines whether or not a difference between the cell information and cell information based on the cell identifier included in the positioning request exceeds a threshold, and the mobile terminal device that has executed the positioning request When the information difference determination unit determines that the difference exceeds the threshold value, it does not transmit assist data used for positioning, and the information difference determination unit determines that the difference does not exceed the threshold value. If so, a program for communication of a position information management device, which functions as a position information transmission unit for transmitting the assist data.
A communication method of a location information management device that manages location information of a base station that transmits and receives data to and from a mobile terminal device,
Transmitted from the mobile terminal device in the user plane, obtain a positioning request including the terminal identifier and cell identifier of the mobile terminal device;
Based on the acquisition of the positioning request, the subscriber information storage unit that stores the subscriber information associated with the terminal identifier of the mobile terminal device is referred to, and the same terminal identifier as the terminal identifier included in the positioning request Get subscriber information associated with the identifier,
Obtaining cell information of a serving cell in which a mobile terminal device having the same terminal identifier as the terminal identifier included in the positioning request is located from a relay device;
Determining whether a difference between the cell information and cell information based on the cell identifier included in the positioning request exceeds a threshold;
If it is determined that the difference exceeds the threshold, the assist data used for positioning is not transmitted to the mobile terminal device that has executed the positioning request, and if it is determined that the difference does not exceed the threshold, A communication method of a location information management device, characterized by transmitting assist data.