KR101236421B1 - The Mechanism of Using Pseudo-ID of the Target Secure User Plane Location(SUPL) Enabled Terminal in the Open Interface of Location Management and Location Calculation Function - Google Patents
The Mechanism of Using Pseudo-ID of the Target Secure User Plane Location(SUPL) Enabled Terminal in the Open Interface of Location Management and Location Calculation Function Download PDFInfo
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- KR101236421B1 KR101236421B1 KR1020060097349A KR20060097349A KR101236421B1 KR 101236421 B1 KR101236421 B1 KR 101236421B1 KR 1020060097349 A KR1020060097349 A KR 1020060097349A KR 20060097349 A KR20060097349 A KR 20060097349A KR 101236421 B1 KR101236421 B1 KR 101236421B1
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Abstract
The present invention provides a target terminal position calculation system and a position calculation method for protecting privacy of a target terminal user. To this end, the present invention allows the real terminal ID of the target terminal to be managed only by the location service management unit (SLC) contracted by the target terminal user to manage his own location value calculation, and not to be exposed to the outside. By doing so, the present invention provides a plurality of location service managers that can be managed from different network managers, even when the location value of the target terminal is obtained using a location calculator (SPC) existing in the external network. It is possible to protect the privacy of the target terminal user by preventing the actual identifier of the user from being transmitted to the location calculator.
Target terminal, privacy, SLC, SPC
Description
1 is a flowchart illustrating a target terminal position calculation process according to the prior art;
2 is a flowchart illustrating a target terminal position calculation process according to an embodiment of the present invention;
3 is a flowchart illustrating an operation of exchanging a message directly between an H-SPC and a target terminal by the H-SPC and the target terminal without passing through the SUPL POS process according to another embodiment of the present invention;
4 is a flowchart illustrating a target terminal position calculation process according to an embodiment of the present invention when the target terminal requests its position value from the H-SLC;
5A to 5D are exemplary views showing a detailed configuration of a Session-Id generated by the H-SLC according to an embodiment of the present invention.
6 is a diagram illustrating a process of calculating a position value of a typical target terminal when the target terminal roams out of the home network;
7 is a diagram illustrating a process of calculating a position value of a target terminal according to another embodiment of the present invention when the target terminal roams out of the home network;
8 is a diagram illustrating a process of calculating a position value of a target terminal according to another embodiment of the present invention when there is a request for a trigger service while the target terminal is roaming out of a home network;
9 is a flowchart illustrating a target terminal position calculation process according to another embodiment of the present invention when the target terminal requests its location value from the target terminal while roaming from the home network;
10 is a target terminal position calculation according to another embodiment of the present invention when the target terminal generates its own virtual ID when the target terminal requests its location value from the home network while roaming from the home network; Flow chart showing the process.
The present invention relates to a method for protecting the privacy of a target terminal user among messages transmitted and received between a Secure User Plane Location (SUPL) Location Center (SUPL) and a SUPL Positioning Center (SPC).
Currently, the use of services using location values of mobile terminals is increasing. Among these, various methods for calculating the position value of the mobile terminal have been developed. One of such location value calculation methods is a location value calculation method using an Internet protocol (IP) network which is widely used at present. In order to use the Assisted-Global Positioning System (A-GPS), the terminal needs to receive information about GPS satellites from a location server. At this time, the position assistance data (location assistance data) of the GPS satellites are loaded on the data packet of the IP network and sent to the mobile terminal. In addition, the mobile terminal sends the measurement data measured using the location assistance data to the location server in a data packet of the IP network. This is a location service using Secure User Plane Location (SUPL), which is covered by the OMA LOC WG (Open Mobile Alliance Location Working Group).
The location server used in SUPL is called SLP (Secure Location Platform), and consists of two functions: an entity serving as a location service management unit (SLC) and a position calculation unit (SPC). It is. The SLC receives the location service request of the target terminal from the client, that is, the SUPL agent, and before performing the process of calculating the position value of the target terminal according to the request, the client, that is, the SUPL agent. The authentication process of the authentication (authentication) and the authentication (Authentication) is performed, and the privacy (Privacy) preset by the target terminal is checked. In addition, charging and charging (Charging) and the case of roaming (roaming case) of the target terminal.
The location calculator SPC generates location assistance data to be sent to the target terminal, and calculates a location value of the target terminal using the location measurement data transmitted from the target terminal. In addition, a position calculation method (POSMETHOD: positioning method) to be used in calculating a position value with the target terminal is determined.
As described above, in the situation where the location server is divided into a location service manager (SLC) that manages a request / response and a location calculator (SPC) that calculates a location value of the target terminal, the data is between the SLC and the SPC. There is an interface for exchanging. This interface will allow future multiple SLCs to share and use a single SPC, or vice versa.
FIG. 1 is a diagram illustrating a process of an operation of transmitting a real ID of a target terminal to an SPC in a situation in which a location server is separated from an SLC and an SPC in the prior art. Looking at the target terminal position calculation process according to the prior art with reference to Figure 1 as follows.
A. SUPL Agent sends a location service request message to H-SLC (Home-SLC: SLC included in Home SLP). The Mobile Location Protocol Start Location Immediate Request (MLP SLIR) includes a mobile station ID (msID), which is an ID of a target terminal, a client-ID, which is an ID of a SUPL agent, and a quality of position (QoP) of a requested location value.
B. The H-SLC determines whether the target terminal is roaming.
C. The H-SLC sends a PREQ (position request) message to the H-SPC (SPC included in the Home SLP). Session-ID consists of SLC session ID and SET Session-Id. At this time, the H-SLC generates an SLC Session-Id with its ID and a unique number that distinguishes a session currently performed by the SLC. Leave the SET Session-Id empty and complete the Session-ID. The H-SLC sends to the H-SPC information about the location calculation method used in this process. Information about the position calculation method (Posmethod) indicates the protocol and position value calculation type to be used for position calculation. The details are identical to the posmethod described in the OMA TS ULP V2.0 standard.
D. H-SPC obtains information about the position calculation method to be used in the session-ID and location calculation process from H-SLC as in process C. In addition, a PRES (Posirioning Response) message is transmitted, which allows a request for a position calculation.
E. And the H-SLC transmits a message indicating the request for calculating the position value to the target terminal. This message is the SLP mode (OMA) indicating whether the session-ID created in step D, the position calculation method to be used for position value calculation (posmethod), and whether the position value calculation process is based on proxy mode or non-proxy mode. The same slp mode used in the TS ULP v2_0 standard). The proxy mode refers to the case where H-SLC and H-SPC are integrated, and the non-proxy mode refers to the case where H-SLC and H-SPC are separated.
F. The target terminal attempts a data communication connection.
G. The target terminal transmits SET capabilities including information on a location calculation method that it can support, and a LID (Location ID, eg, cell ID) indicating current network information. At this time, the target terminal fills its own real identifier (real ID) to the SET session-ID included in the Session-ID. Here, the actual identifier is unique information for recognizing the target terminal on the network or distinguishing the target terminal from other terminals. The real identifier may be, for example, an International Mobile Subscriber Identity (IMSI) or Mobile Station International Integrated Services Digital Network (MSISDN) values. Alternatively, a unique IP address given to the target terminal may be possible.
H. The H-SLC carries the message generated in step G to the H-SPC by loading it in Positioning Data (PDATA). At this time, the H-SPC receives the actual identifier of the target terminal.
I. (Optional Course) If the H-SPC fails to create a coarse position with the LID of the SUPL POS INIT (Positioning Initiate) message included in the PDATA, send the LID back to the H-SLC to request the coarse position from the H-SLC. In this case, the coarse position refers to information about an actual physical area corresponding to network information such as LID (for example, name information on the current location of Seoul, Incheon, etc., or Gangbuk-gu, Gangnam-gu, etc.).
J. (Optional Course) Upon receiving PLREQ (Positioning LID REQuest) message as in Process I, the H-SLC has a LID, creates a coarse position, and sends it to the H-SPC.
K. The target terminal performs a process for calculating a position value together with the H-SPC and the H-SLC. This content is identical to the SUPL POS (Positioning) described in the OMA LOC AD SUPL V2_0 standard.
L. After the calculation of the position value of the target terminal is completed, the H-SPC includes the SUPL END message to be sent to the target terminal in PDATA and delivers it to the H-SLC.
M. H-SLC delivers a SUPL END message to the UE.
N. H-SPC sends the calculated position value (pos_result) to H-SLC.
O. H-SLC sends the calculated position value to SUPL Agent.
Here, the location service manager (SLC) and the location calculator (SPC) are separated from each other, meaning that the SLC and the SPC can be managed by different network operators (eg, mobile operators). For example, network operators manage only the SLC, and a location calculation unit (SPC) may exist in an external network. In this case, delivering the actual identifier (eg, MSISDN, IMSI, IP ADDRESS) of the target terminal to the SPC as in the prior art, there is a risk that the current position value of the target terminal is exposed. That is, if the location value of the target terminal and the actual identifier of the target terminal come and go at the same time between the SPC and the SLC, there is a problem that a privacy violation may occur.
In general, the user of the target terminal only contracts the content of the location service authority with the location service management unit (SLC) of the location server, and does not contract with the location calculation unit (SPC). The user of the target terminal also does not want to be transmitted to an entity other than SLC because his real ID is related to his privacy. In addition, the position value calculator (SPC) does not necessarily need the actual identifier of the target terminal. This is because the position value calculation unit SPC only distinguishes a plurality of position value calculation requests that are input and gives a response appropriate to the request.
Therefore, an object of the present invention is to ensure that a real ID of a target terminal is managed only by the location service manager SLC so that the target terminal user manages his own location value calculation and is not exposed to the outside. By doing so, the present invention is a user of a terminal of a target terminal even when a plurality of location service managers, which can be managed from different network managers, obtain a location value of the target terminal using a location calculator (SPC) existing in an external network. It is an object of the present invention to provide a target terminal location calculation system and a location calculation method that does not pass a real identifier of the ID to the location calculation unit.
In order to achieve the above object, a Home-SUPL (Secure User Plane Location) Location Center (H-SLC) generates a virtual ID of the target terminal and requests a position value calculation request including the virtual ID (PREQ). The first step of transmitting a message to a home-SUPL positioning center (H-SPC), and the H-SLC includes the virtual ID in a SUPL POS INIT message indicating a request for calculating a position value, and transmits the message to the target terminal. A second step of transmitting, by the target terminal, a SUPL POS INIT message for calculating a position value of the target terminal including the virtual ID to the H-SLC instead of its actual ID; and the H- The fourth step of the SLC transmitting the PDATA for calculating the position of the target terminal, including the virtual ID, to the H-SPC; and the target terminal, the H-SLP, and the H-SLC, the virtual The target terminal is distinguished using an ID, and the position value of the target terminal And a fifth step of transmitting the calculated position value by the H-SLC to the position value requester of the target terminal.
In another method according to an embodiment of the present invention, a Home-SUPL (Secure User Plane Location) location center (H-SLC) generates a virtual ID of the target terminal and requests a position value calculation including the virtual ID. A first step of transmitting a (PREQ) message to a home-SUPL positioning center (H-SPC), and the H-SLC includes the virtual ID in a SUPL POS INIT message that informs the position value calculation request to the target terminal. In the second step of transmitting and when the target terminal recognizes the NON-Proxy mode from the SUPL POS INIT message, a SUPL AUTH REQ (SUPL authentication request) is sent to the H-SLC using the Session-ID including the virtual ID. A third step of transmitting a message; and a fourth step of transmitting, by the H-SLC, a SUPL AUTH (SUPL authentication) message to the H-SPC using the Session-ID including the virtual ID, and the target. The terminal uses the Session-ID including the virtual ID instead of its actual ID. A fifth step of transmitting a SUPL POS INIT message to the H-SPC; and identifying, by the target terminal and the H-SPC, the target terminal using the virtual ID and calculating a position value of the target terminal. And a sixth step of the H-SLC receiving the calculated position value from the H-SPC and providing it to the position value requester of the target terminal.
Another method according to an embodiment of the present invention, the target terminal transmits a location value request message for obtaining its own location value to the H-SLC [Home-SUPL (Secure User Plane Location) location Center] A second step of generating, by the H-SLC, a virtual ID for distinguishing the target terminal by the H-SLC and a Home-SUPL Positioning Center (H-SPC) during the position calculation of the target terminal; A third step of the H-SLC applying the virtual ID to the SET Session-ID portion of the Session-ID, and transmitting the POSMETHOD selected by the H-SLC and the LID transmitted by the target terminal to the H-SPC; Transmitting, by the H-SLC, a Session-ID whose SET Session-ID portion is changed to the virtual ID to the target terminal, and the target terminal confirms the Session-ID and replaces its own real ID. A fifth step of transmitting a SUPL POS INIT message to the H-SLC by including the virtual ID; A sixth step of H-SLC including the SUPL POS INIT message in PDATA and transmitting the same to the H-SPC; the target terminal and the H-SPC distinguish the target terminal using the virtual ID; And a seventh step of performing a location calculation process of the target terminal, and an eighth process of the H-SLC providing the target terminal with the calculated position value of the target terminal from the H-SPC.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the same components in the drawings are denoted by the same reference numerals whenever possible. In the following description and the annexed drawings, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.
2 is a flowchart illustrating a target terminal position calculation process according to an exemplary embodiment of the present invention. In the case of Figure 2 also SLC and SPC will be described on the assumption that the components corresponding to the H-SLP.
Looking at the target terminal position calculation process according to an embodiment of the present invention with reference to FIG.
A. The
B. The H-
C. The H-
Alternatively, it is assumed that the H-
D. The H-
E. The H-
F. The H-
G. The
H. The
I. The H-
J. (Optional Course) If the H-
K. (Optional Course) When the PLREQ message is received as in the process J, the H-
L. The
M. After the position value calculation of the
N. The H-
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P. The H-
FIG. 3 illustrates an operation process when the SPC and the target terminal are in a non-proxy mode where location information service of the target terminal is performed by exchanging a message directly between the SPC and the target terminal without passing through the SLC according to another embodiment of the present invention. One drawing.
Among them, the process A ~ B is the same as the process A ~ B of FIG.
The C.H-
Alternatively, it is assumed that the H-
D. The H-
E. The H-
F. The
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2 and 3 illustrate a case where a third party (SUPL agent) requests a location server (SLP) for a location value of a target terminal. However, the target terminal may of course request its own location value to the location server (SLP). 4 is a diagram illustrating an operation process of requesting, by the target terminal, its position value to the SLP according to an embodiment of the present invention.
Referring to FIG. 4, when the target terminal requests its position value from the SLP, the target terminal position calculation process according to an embodiment of the present invention will be described.
A. The
B. The H-
C. The H-
D. The H-
E. H-
F. The H-
G. The
H. The
I. The H-
J. Positioning messages exchanged between the H-
The present invention will not be described in the non-proxy mode, but the H-
K. When the location calculation is completed, the H-
L. The H-
M. H-
5A to 5D are diagrams illustrating an example of a detailed configuration of a Session-Id generated by an SLC according to an embodiment of the present invention as described above.
First, FIG. 5A shows a configuration of a Session-ID used in FIGS. 2, 3, and 4 of the present invention.
Session-ID is an identifier used for messages exchanged between SLC, SPC, and target terminal. With this, each entity distinguishes the messages it sends and receives, and helps to send and receive IDs between each other.
Session-ID is composed of SLC-Sesssion-ID containing SLC information and SET Session-ID containing information of the target terminal.
5B shows the configuration of the SET Session-Id. In the present invention, a virtual ID, that is, pseudo-ID or anonymous-ID, is used as a value of the SET Session-ID. The pseudo-ID is an arbitrary unique identifier generated by the SLC, and the anonymous-ID stores a privacy control entity (PCE) of the target terminal, and if the location server requests the anonymous-Id of the target terminal, the anonymous- ID is created and delivered, or it stores a predetermined anonymous-ID, and finds and delivers it). 5C is a diagram illustrating an example of information included in parameters and detailed information of a Session-ID used in an SLC of the present invention.
FIG. 5D illustrates an example in which the parameter of Session-ID is ID mode. A SET Session-ID of the target terminal is included in the Session-Id of the SUPL POS INIT message message that the target terminal sends to the SLC or SPC. At this time, according to the ID mode sent by the SLC, the target terminal indicates whether to display a SET Session-ID value using a real identifier or a SET Session-ID value using a pseudo-ID or an anonymous-ID. Decide
In addition, the above-described embodiments of the present invention have been described on the assumption that only the case where the target terminal is located in the home network (that is, the position value of the target terminal is calculated only through the H-SLC and the H-SPC of the H-SLP) has been described. Of course, the present invention can be applied even when the target terminal is roaming out of the home network. In the following description, an embodiment of the present invention that can be applied in such a case, that is, when the target terminal is out of the home network will be described.
In general, when the target terminal whose position value is to be calculated is located outside the home network and is in an external network, the location server in the home network is currently roaming with the help of the location server in the external network where the target terminal is currently located. Calculate the position value. In this process, the home location server transmits a unique ID (eg, imsi, MSISDN, etc.) of the target terminal to the visited location server existing in the external network, and uses it as an identifier for identifying the target terminal.
Hereinafter, when the target terminal is roaming out of the home network, a process of calculating a position value of a typical target terminal will be described with reference to FIG. 6. Hereinafter, in FIG. 6, an R-SLP (Request-SLP) 603 receives a location information service request of a
Referring to FIG. 6, it can be seen that, in a typical case, the process of calculating the position value of the target terminal when the target terminal roams from the home network may be performed by the following steps.
A. The
B. The R-
C. The R-
D. The H-
E. When the
F. The V-
G. The H-
The
I. The
J. The H-
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L. When the position value calculation of the
The M. H-
N. The H-
O. The R-
Therefore, even if the H-SPC uses a virtual ID, that is, pseudo-ID or anonymous-ID, to calculate the location of the target terminal in the above-described embodiment of the present invention, if the target terminal is roaming to the external network, the target The actual identifier of the terminal is transmitted to the V-SLP through the external network. Therefore, in this case, the actual discriminator and the position value of the target terminal are simultaneously used by entities such as V-SLP in the external network, thereby increasing the possibility of the user's privacy invasion. Therefore, the following embodiments of the present invention (hereinafter, referred to as other embodiments of the present invention) provide a method for protecting the privacy of the target terminal user even in such a case.
In another embodiment of the present invention, when the target terminal is roaming on the external network, the home location server H-SLP requests the visited location server V-SLP to calculate the location value of the target terminal. Here, the home location server delivers an identifier (ID) for the visited location server to distinguish the target terminal. This identifier is temporarily set by the home location server. The home location server maps the real identifier and virtual ID of the target terminal, that is, pseudo-ID or anonymous-ID, and the real identifier and pseudo-ID or anonymous while calculating the position of the target terminal. -Match the ID. Therefore, when the location value is calculated while the target terminal is roaming, the home location server transmits the temporary ID according to the pseudo-ID or anonymous-ID to the visited location server, so that the actual identifier of the target terminal is transmitted outside the home network. prevent. Hereinafter, another embodiment of the present invention will be described with reference to FIG. 7.
Referring to Figure 7, it can be seen that the operation according to another embodiment of the present invention can be performed by the following steps.
B. The R-
C. The R-
D. The H-
E. When the
F. The V-
G. The H-
The
I. The
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When the position value calculation of the
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However, in general, a single position value calculation of the target terminal is not performed, but a case where a plurality of position value calculations are performed according to a condition suggested by the service requester, that is, a triggered service may be considered. In the case of the triggered service, the service requester designates a specific place, and when the target terminal arrives or leaves, or sets a certain period and the period expires, the event is regarded as an event and the location of the target terminal is determined. The value is calculated and the calculated position value is provided to the service requester. Of course, the present invention can be sufficiently applied to such a trigger service. 8 is a diagram illustrating an operation process of calculating a position value of a target terminal according to an embodiment to which the present invention is applied in the case of such a trigger service. Referring to FIG. 8, it can be seen that the position value calculation process can be performed by the following steps.
B. The H-
C. When the H-
D. The H-
E. The
F. The
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H. H-SLP 811 (H-
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T. When a local event occurs, the
U. The H-
Therefore, even in the case of a trigger service, when the home location server (H-SLP) exchanges a message with an entity existing in the external network in the process of calculating the location value of the target terminal as shown in the above-described embodiment of the present invention. In this case, the virtual ID is used instead of the actual identifier of the target terminal. The H-SLP requests the coarse position corresponding to the LID (Location ID) received from the target terminal to the V-SLP, and the H-SLP calculates the position value of the target terminal using the received coarse position. . That is, H-SLP according to the embodiments of the present invention, when the target terminal is roaming to the external network, coarse corresponding to the generation and matching operation of the virtual ID of the target terminal and the LID received from the target terminal, similarly during the triggering service. It transmits position to V-SLC which stores position
7 and 8 have been described on the assumption that a third party service requester (SUPL Agent) requests the location server (H-SLP or H-SLC) for the location value of the target terminal. Of course, there may be a case where a location value is requested from a location server. 9 is a diagram illustrating a position value calculation process according to the target terminal itself requesting its own position value in this case, that is, when the target terminal is roaming to the external network. Referring to FIG. 9, it can be seen that the position value calculation process can be performed by the following steps.
A. The
B. The
C. When receiving the message from the
D. Since the
E. The V-
F. The H-
G. The
H. The H-
I. The V-
J. When the V-
K. The H-
FIG. 10 assumes that when the target terminal requests its location value to the location server as described above, it generates its own virtual ID and delivers its real identifier and virtual ID to the H-SLP at the same time. It is. That is, in this case, while the target terminal is roaming, the H-SLP stores a real identifier and a virtual ID sent from the target terminal, performs a mapping operation to map them to each other, and when calculating the position value of the target terminal, the external network. This function prevents the virtual ID of the target terminal from being transmitted to the entity existing in.
Referring to FIG. 10, it can be seen that the position value calculation process can be performed by the following steps.
A. The
B. The
C. When the H-
D. Since the
E. The V-
F. The H-
G. The
H. The H-
I. The V-
J. When the V-
K. The H-
Accordingly, as shown in FIG. 10, the target terminal may generate and use a virtual ID for use by the target terminal. In this case, the H-SLP also performs mapping between the virtual ID and the actual identifier of the target terminal. 9 and 10 may be selected when the location information providing system is implemented.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. In particular, although FIG. 9 and FIG. 10 of the present invention assume an immediate location service in which the location value of the target terminal is calculated and terminated only once, the same can be applied to the triggered location service in which the value of the
Therefore, in the present invention, when the location server is separated into the location service management unit and the location calculation unit, and each exists in the network, the actual identifier (eg, msID, MSISDN, IMSI, IP address, etc.) of the target terminal that is the location value calculation target is calculated. If negative, the location value and the actual identifier of the target terminal are transmitted at the same time. At this time, if the location value and the actual discriminator are transmitted at the same time, if the hacking occurs in a situation where the location service management unit and the location calculation unit are separated, the privacy of the target terminal user may be infringed.
Therefore, the position value of the target terminal should be handled very carefully and safely because of the privacy of the target terminal user. However, in the related art, the location service manager delivers the actual identifier of the target terminal to the position value calculator, so that the actual identifier and the position value of the target terminal are simultaneously exposed.
In general, the user of the target terminal has a contract with the location service manager for managing his actual distinguisher, and is not related to the location calculator. Therefore, the present invention allows the position value calculation to be performed without the actual identifier of the target terminal to the position calculation unit. Accordingly, in the present invention, by reducing the risk that the actual identifier and the location value of the target terminal user is hacked at the same time, it is possible to enhance the privacy protection of the target terminal user during location services. Furthermore, the method of the present invention, in which the location service manager generates a pseudo-ID or an anonymous ID and passes it to the location calculation unit, in the environment where the location service management section and the location calculation section are managed by each network administrator, the user privacy of the target terminal Better protection. This is because when the location calculation unit or the location service manager exists in a separate network, the location service manager and the location calculation unit exchange messages because the location value of the target terminal and the actual distinguisher are more likely to be hacked at the same time.
In addition, even when the mock terminal is roaming, even when the home location server requests the visited location server to calculate the location value. When the position value of the roaming target terminal is calculated, the actual identifier of the target terminal is not transmitted, and the position value can be calculated, so that a hacking occurs that an entity without external authority intercepts the position value of the target terminal. In other words, since the actual identifier of the target terminal is unknown, the privacy of the target terminal user can be protected.
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US11/758,164 US8478287B2 (en) | 2006-06-07 | 2007-06-05 | Method for positioning target terminal while protecting privacy of user thereof |
US13/689,038 US8971918B2 (en) | 2006-06-07 | 2012-11-29 | Method for positioning target terminal while protecting privacy of user thereof |
US14/575,038 US9131463B2 (en) | 2006-06-07 | 2014-12-18 | Method for positioning target terminal while protecting privacy of user thereof |
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KR20030052841A (en) * | 2001-12-21 | 2003-06-27 | 주식회사 케이티 | Gateway mobile location center and location service method in 3GPP |
KR20030068474A (en) * | 2002-02-13 | 2003-08-21 | 닛뽕덴끼 가부시끼가이샤 | Location system with enhanced security |
US20050118999A1 (en) | 2003-12-02 | 2005-06-02 | Yinjun Zhu | User plane location based service using message tunneling to support roaming |
KR20060013323A (en) * | 2004-08-06 | 2006-02-09 | 엘지전자 주식회사 | Apparatus and method for managing user privacy in mobile communication system |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR20030052841A (en) * | 2001-12-21 | 2003-06-27 | 주식회사 케이티 | Gateway mobile location center and location service method in 3GPP |
KR20030068474A (en) * | 2002-02-13 | 2003-08-21 | 닛뽕덴끼 가부시끼가이샤 | Location system with enhanced security |
US20050118999A1 (en) | 2003-12-02 | 2005-06-02 | Yinjun Zhu | User plane location based service using message tunneling to support roaming |
KR20060013323A (en) * | 2004-08-06 | 2006-02-09 | 엘지전자 주식회사 | Apparatus and method for managing user privacy in mobile communication system |
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