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 PDF

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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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target terminal
location
supl
virtual
slp
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KR1020060097349A
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Korean (ko)
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KR20070117429A (en
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김주영
김욱
전해영
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삼성전자주식회사
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Priority to US11/758,164 priority Critical patent/US8478287B2/en
Publication of KR20070117429A publication Critical patent/KR20070117429A/en
Priority to US13/689,038 priority patent/US8971918B2/en
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Publication of KR101236421B1 publication Critical patent/KR101236421B1/en
Priority to US14/575,038 priority patent/US9131463B2/en

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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

{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}

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 SUPL Agent 301 transmits a location service request message to the H-SLC 303. MLP SLIR (Mobile Location Protocol Start Location Immediate Request) includes msID, which is the ID of the target terminal 307, client-ID, which is the ID of the SUPL Agent, and QoP of the requested location value.

B. The H-SLC 303 determines whether the target terminal 307 is roaming.

C. The H-SLC 303 generates a pseudo-ID of the target terminal 307. The pseudo-ID is used by the H-SPC 305 to distinguish the target terminal 307 when calculating the position value of the target terminal 307. The reason for using the pseudo-ID is that the positional value of the target terminal 307 is hacked when the actual identifier and the position value of the target terminal 307 are transmitted together with the position value of the target terminal 307 being calculated and transmitted. This is because the privacy of the user of the target terminal 307 is likely to be violated. Therefore, in order to prevent this, the actual identifier is not passed to the SPC that calculates the position value. The pseudo-ID may be made by the location service manager (H-SLC 303) to any unique number.

Alternatively, it is assumed that the H-SLC 303 tells a Privacy Control Entity (PCE) that a real-ID (target-ID) of the target terminal 307 is used in the present invention. The actual identifier used is OMA TS ULP V2. By using the same contents of SET session-ID defined in .0), you can use the pre-appointed Pseudonym-ID. Anonymous-ID uses the same content used in OMA PCP V1.0. That is, the H-SLC 303 directly generates a pseudo-ID of the target terminal 307 to be used while calculating the position of the target terminal 307 or Pseudonym-ID (anonymous-ID) used in PCP V1.0. Can be used.

D. The H-SLC 303 sends a PREQ message to the H-SPC 305. At this time, the H-SLC 303 transmits the pseudo-ID or anonymous-ID generated in step C to the SET Session-ID of the Session-ID. Session-ID consists of SLP Session-ID and SET Session-ID. At this time, the H-SLC 303 generates an SLP Session-Id with its ID and a unique number that distinguishes the session currently performed by the H-SLC 303. In addition, the H-SLC 303 fills the SET-Session-ID part using the pseudo-ID or anonymous-ID created in step B and transmits it to the H-SPC 305. The H-SLC 303 transmits information (posmethod) on the position calculation method to be used in this process to the H-SPC 305. Information on the position calculation method (Posmethod) indicates the protocol and position value calculation type to be used for position calculation. The details are the same as the posmethod present in OMA TS ULP V2.0. Hereinafter, a detailed configuration of the session-ID generated by the H-SLC 303 according to the embodiment of the present invention will be described with reference to FIG. 5.

E. The H-SPC 305 looks at the Session-ID received from the H-SLC 303 in step D and obtains a pseudo-ID or an anonymous-ID of the target terminal 307. Also, information (posmethod) about a location calculation method to be used in the location calculation process of the target terminal 307 is obtained. It sends a PRES message, a message that allows a position calculation request.

F. The H-SLC 303 transmits a message informing of the position value calculation request to the target terminal 307. This message is the SLP mode (OMA) indicating whether the session-ID generated 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. And use the same SLP mode used in TS ULP v2_0). In the present invention, when the target terminal 307 uses the SET-Session-Id, whether or not to use the real identifier of the target terminal 307 or the pseudo-Id transmitted by the H-SLC 303 or An ID mode is included to indicate whether to use anonymous-ID. The H-SLC 303 transmits the pseudo-ID or anonymous-ID generated in step C to the target terminal 307 in the SUPL POS INIT message to the target terminal 307.

G. The target terminal 307 attempts a data communication connection.

H. The target terminal 307 acquires and stores a pseudo-ID or an anonymous-ID transmitted from F according to the ID mode of the process F. In step F, the H-SLC 303 uses the pseudo-ID in the SET Session-ID portion of the Session-Id. That is, in the present invention, the target terminal 307 does not include the actual identifier of the target terminal 307 in the SET Session-Id.

I. The H-SLC 303 carries the SUPL POS INIT message of process H in PDATA and delivers it to the H-SPC 305. In this case, the H-SLC 303 also includes the pseudo-ID or the anonymous-ID of the target terminal 307 in the SET Session-ID of the Session-ID.

J. (Optional Course) If the H-SPC 305 fails to make a coarse position with the LID of the SUPL POS INIT message included in the PDATA, it sends the LID back to the H-SLC 303 to coarse it to the H-SLC 303. Request position

K. (Optional Course) When the PLREQ message is received as in the process J, the H-SLC 303 has a LID, generates a coarse position, and delivers the coarse position to the H-SPC 305.

L. The target terminal 307 performs a process for calculating a position value together with the H-SPC 305 and the H-SLC 303. This content is the same as SUPL POS of OMA LOC AD SUPL V2_0.

M. After the position value calculation of the target terminal 307 is completed, the H-SPC 305 includes a SUPL END message to be sent to the target terminal 307 in PDATA and delivers it to the H-SLC 303.

N. The H-SLC 303 delivers a SUPL END message to the target terminal 307.

O. The H-SPC 305 transmits the calculated position value to the H-SLC 303.

P. The H-SLC 303 transmits the calculated position value to the SUPL Agent 301.

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-SLC 403 generates a pseudo-ID of the target terminal 407. The pseudo-ID is used by the H-SPC 405 to distinguish the target terminal 407 when calculating the position value of the target terminal 407. The reason for using the pseudo-ID is that the positional value of the target terminal 407 is hacked when the actual identifier and the positional value of the target terminal 407 are transmitted together in the process of calculating and transmitting the position value of the target terminal 407. This is because privacy of the target terminal 407 user is likely to be violated. Therefore, in order to prevent this, the actual identifier is not transmitted to the H-SPC 405 that calculates the position value. The pseudo-ID may be any unique number generated by the location service manager (H-SLC) 403.

Alternatively, it is assumed that the H-SLC 403 is assigned to a Privacy Control Entity (PCE) by the real-ID of the target terminal 407 (in the present invention, msID), where the actual identifier is OMA TS ULP V2. By using the same contents of SET session-ID defined in 0), you can use the pre-appointed Pseudonym-ID. Anonymous-ID uses the same content used in OMA PCP V1.0. That is, the H-SLC 403 directly generates a pseudo-ID of the target terminal 407 to be used while calculating the position of the target terminal 407, or uses a Pseudonym-ID (anonymous-ID) used in PCP V1.0. ) Can be used. The H-SLC 403 then sends a PREQ message to the H-SPC 405. At this time, the H-SLC 403 transmits the pseudo-ID or anonymous-ID generated in step C to the SET Session-ID of the Session-ID. Session-ID consists of SLP Session-ID and SET Session-ID. At this time, the H-SLC 403 generates an SLP Session-Id with its ID and a unique number that distinguishes the session currently performed by the H-SLC 403. In addition, the H-SLC 403 fills the SET-Session-ID part using the pseudo-ID or anonymous-ID created in step B and transmits it to the H-SPC 405. The H-SLC 403 transmits information (posmethod) on the position calculation method to be used in this process to the H-SPC 405. Information on the position calculation method (Posmethod) indicates the protocol and position value calculation type to be used for position calculation. The details are the same as the posmethod present in OMA TS ULP V2.0. Hereinafter, a detailed configuration of the session-ID generated by the H-SLC 403 according to the embodiment of the present invention will be described with reference to FIG. 5.

D. The H-SPC 405 sees the Session-ID received from the H-SLC 403 in step C and obtains a pseudo-ID or an anonymous-ID of the target terminal 407. In addition, information (posmethod) about the position calculation method to be used in the position calculation process of the target terminal 407 is obtained. In addition, a PRES message, which is a message allowing a position calculation request, is transmitted.

E. The H-SLC 403 transmits a message informing of the position value calculation request to the target terminal 407. 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 TS ULP v2_0). In the present invention, when the target terminal 407 uses the SET Session-Id, whether or not to use the real identifier of the target terminal 407, the pseudo-Id or an anonymous message transmitted by the H-SLC 403. -ID mode indicating whether to use ID is included. The H-SLC 403 transmits the pseudo-ID or anonymous-ID generated in step C to the target terminal 407 in the SUPL POS INIT message to the target terminal 407. Although the SUPL POS INIT message is not shown, the target terminal 407 is transmitted using a key (key ID1) that can be used for authentication.

F. The target terminal 407 attempts a data communication connection.

G. The target SET 407 looks at the SLP mode of process E and recognizes that it is a NonProxy mode that communicates directly with the H-SPC 405. The H-SLC 403 sends a SUPL AUTH REQ message. At this time, the SET SEession-ID contained in the Session-ID is used as the pseudo-ID or the anonymous-ID determined by the H-SLC 403 as in step E. The SUPL AUTH REQ message includes a key (key-ID2) of the target terminal 407.

H. H-SLC 403 sends a SUPL AUTH (SUPL Authentication) message to H-SPC 405. In this case, the dm pseudo-ID or anonymous-ID of the target terminal 407 is included in the Session-Id. When the H-SPC 405 receives a message from the target terminal 407 as in step J, a key (key ID3) used to authenticate the target terminal 407 is included.

I. The H-SLC 403 sends a key (key ID4) used when sending a SUPL POS INIT message to the target terminal 407.

J. The target terminal 407 sends a SUPL POS INIT message to the H-SPC 405. In this case, the Session-Id includes a pseudo-ID or an anonymous-ID of the target terminal 407.

K. The H-SPC 405 and the target terminal 407 perform a position value calculation process. '

L. After the position value is calculated, the H-SPC 405 sends a SUPL END message to the target terminal 407.

M. H-SPC 405 sends the calculated position value to H-SLC 403.

N. The H-SLC 403 transmits the position value to the SUPL Agent 401.

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 target terminal 505 sends a SUPL START message for starting the location information providing service to the H-SLC 501 to obtain its location value. This message includes a Session-Id, and the target terminal 505 includes the real-ID of the Session-ID.

B. The H-SLC 501 determines whether the target terminal 505 is roaming by looking at a location ID (eg, cell ID) sent by the target terminal 505.

C. The H-SLC 501 generates a pseudo-ID or an anonymous-ID in which the H-SLC 501 and the H-SPC 503 can distinguish the terminal from the position calculation process of the target terminal 505. Here, the H-SLC 501 may generate a pseudo-ID or an anonymous-ID by generating a unique number, and request the pseudo-ID or anonymous-ID of the target terminal 505 from a privacy control entity (PCE). Can be obtained. The method of obtaining pseudo-ID or anonymous-ID using PCE is the same as described in OMA PCP V1.0 standard.

D. The H-SLC 501 includes the pseudo-ID or anonymous-ID obtained in step C in the SET Session-ID portion of the Session-Id. In addition, the H-SLC 501 transmits the information (posmethod) about the location calculation method selected by the H-SLC 501 and the LID sent by the target terminal 505 to the H-SPC 503. Posmethod refers to information about a location calculation method to be used by the H-SPC 503 and the target terminal 505 in the location calculation process.

E. H-SPC 503 sends PRES in response. At this time, the H-SPC 503 obtains the pseudo-ID or anonymous-ID of the target terminal 505 from the Session-ID received through process D.

F. The H-SLC 501 transmits a Session-ID to the target terminal 505. At this time, the SET Session-ID portion of the Session-ID is changed to a pseudo-ID or an anonymous-ID generated by the H-SLC 501 in step C. ID mode indicates the target terminal 505 to use a pseudo-ID or an anonymous-ID in the SET Session-ID portion included in the Session-ID. The H-SLC 501 transmits a pseudo-ID or an anonymous-ID to the target terminal 505.

G. The target terminal 505 sees the ID mode and inserts a pseudo-ID or an anonymous-ID in place of its actual identifier in the SET Session-ID portion of the Session-ID.

H. The target terminal 505 sends a SUPL POS INIT message to the H-SLC 501.

I. The H-SLC 501 includes the SUPL POS INIT message in PDATA and sends it to the H-SPC 503.

J. Positioning messages exchanged between the H-SPC 503 and the target terminal 505 are transmitted through the H-SLC 501. This shows the case where the H-SLC 501 acts as a proxy, i.e., the proxy mode, and the H-SPC 505 and the target terminal 505 are directly connected without the H-SLC 503 being in the middle. This is the case in non-proxy mode.

The present invention will not be described in the non-proxy mode, but the H-SLC 501, which is the subject of the present invention, obtains a pseudo-ID or an anonymous-ID, and the H-SPC 503 is calculating the location using the same. Recognizing the target terminal 505 may be applied as it is, even in the non-proxy mode.

K. When the location calculation is completed, the H-SPC 503 loads a SUPL END message to the target terminal 505 to the H-SLC 501.

L. The H-SLC 501 transmits a SUPL END message to the target terminal 505.

M. H-SPC 503 sends a message to the H-SLC 501 indicating that the session is over.

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 target terminal 609 from a SUPL agent 601 and transmits a location value of the target terminal to the SUPL agent 601. The location server refers to a location server, and the V-SLP (Visited-SLP: 605) refers to a location server according to a network where the target terminal 609 is currently located.

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 SUPL Agent 601 sends a MLP Mobile Location Protocol Start Location Initiation Request (SLIR) message to a Requesting SUPL Location Platform (R-SLP) to request location service start. The MLP SLIR message includes an actual identifier (eg, msID) of the target terminal 609, a client-ID which is an ID of the SUPL agent 601, and a QoP indicating a quality level of a location value of the target terminal 609. The R-SLP 603 checks the service location information service request authority of the SUPL Agent 601.

B. The R-SLP 603 uses the actual identifier (eg, msID) of the target terminal 609 when the SUPL Agent 601 has the right to request the service location information service. -Retrieve the SLP 607.

C. The R-SLP 603 forwards a Location Information Request message to the retrieved H-SLP 607. In this case, the location request may be made through an RLP Roaming Location Protocol SUPL Roaming Location Initiation Request (RLP) message using the RLP protocol.

D. The H-SLP 607 then uses the actual identifier of the target terminal 609 to determine whether the target terminal 609 is currently roaming out of the home network.

E. When the target terminal 609 is roaming, the H-SLP 607 uses the V-SUPL Start Roaming Location Initiation Request (RLP SSRLIR) message to start location information service of the target terminal 609 currently roaming. Send to SLP 605. The H-SLP 607 generates a SUPL Start Message. At this time, the SET Session-ID portion of the SUPL Start message is left blank. As such, the H-SLP 607 informs the V-SLP 605 that this session is a Network Initiated case.

F. The V-SLP 605 sends an RLP SSLOIA (Roaming Location Protocol SUPL Start Roaming Location Initiation Answer) message to the H-SLP 607 when the preparation of the SUPL location calculation process requested by the H-SLP 607 is completed.

G. The H-SLP 607 transmits a SUPL POS INIT (SUPL Positioning Initiation) message to request a location session start request using SUPL to the target terminal (SET) 609 through WAP PUSH or SMS. The SUPL POS INIT message includes a Session-ID for indicating a session created between the H-SLP 607 and the target terminal 609. At this time, the Session-ID includes an SLP Session-ID portion for the H-SLP 607 and a SET Session-ID for the target terminal 609. The dual SLP Session-ID may be identifier information indicating a Session-ID or an H-SLP 607 that the H-SLP 607 sequentially generates. This identifier information may be IP address information or fully qualified domain name (FQDN) information. The SET Session-ID portion may be a Session-ID or a unique identifier representing the target terminal 609 sequentially generated by the target terminal 609. This identifier information may be unique MSISDN, MDN, IMSI, IP address information, etc. of the target terminal 609. In addition, the SUPL POS INIT message includes information about a location calculation method and a protocol supported by the H-SLP 607. In addition, the SUPL POS INIT message may include an SLP mode. The SLP mode indicates whether the location server for calculating the location value of the target terminal 609 is a proxy mode or a non-proxy mode. The distinction between proxy mode and non-proxy mode can be determined according to whether the location server is divided into a location value calculator (SPC) and a location service manager (SLC).

The target terminal 609 receiving the H. SUPL POS INIT message starts a data communication connection.

I. The target terminal 609 transmits a SUPL POS INIT message to the H-SLP 607. The message includes the Session-ID, the LID including information on the network where the current target terminal 609 is located, and the SET capability. Here, LID represents a Location ID, and may be a cell ID or an Access ID of a WLAN or a WiMAX (Wireless Local Area Network). The SET capability includes information (posmethod) about a location calculation method and protocol that the target terminal 609 can support.

J. The H-SLP 607 transmits the SUPL POS INIT message sent from the target terminal 609 to the V-SLP 605 using a Roaming Location Protocol-SUPL Start Roaming Position (RPL-SSRP) message.

K. The V-SLP 605 compares the SET capability of the SUPL POS INIT message included in the RLP-SSRP message with the position calculation methods that the V-SLP 605 can support, and finally calculates the position to use during the current session. Determine the method and protocol. The determined location calculation method and protocol are transmitted to the target terminal 609. The V-SLP 605 and the target terminal 609 exchange messages required for the position calculation process. At this time, the H-SLP 607 serves to deliver a message exchanged between the target terminal 609 and the V-SLP 605.

L. When the position value calculation of the target terminal 609 is completed, the V-SLP 605 sends the H-SLP 607 the position value of the target terminal 609 and the SUPL END message to be sent to the target terminal 609. .

The M. H-SLP 607 forwards the SUPL END message to the target terminal 609. The H-SLP 607 and the target terminal 609 terminate the current session.

N. The H-SLP 607 transfers the position value of the target terminal 609 to the R-SLP 603.

O. The R-SLP 603 transmits the position value of the target terminal 609 to the SUPL Agent 601.

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.

A. SUPL Agent 701 sends an MLP SLIR message to R-SLP 703 to request location service start. The MLP SLIR message includes an actual identifier (eg, msID) of the target terminal 709, a client-ID that is an identifier of the SUPL agent 701, and a QoP indicating a quality level of a location value of the target terminal 709. The R-SLP 703 checks the service location information service request authority of the SUPL Agent 701.

B. The R-SLP 703 uses the actual identifier (eg, msID) of the target terminal 709 when the SUPL Agent 701 has the service location information service request right, and the H of the target terminal 709. -Retrieve the SLP 707.

C. The R-SLP 703 forwards a Location Information Request message to the retrieved H-SLP 707. In this case, the location request may be made through an RLP SRLIR message using the RLP protocol.

D. The H-SLP 707 uses the target terminal 709 actual identifier to determine whether the target terminal 709 is currently roaming out of the home network. When the target terminal 709 is currently roaming, the H-SLP 707 generates a pseudo-ID or an anonymous-ID to prevent exposing the actual identifier of the target terminal 709 to an external network outside the home network. do. The H-SLP 707 uses the generated pseudo-ID or anonymous-ID until the currently connected session ends, and stores mapping information of the pseudo-ID or anonymous-ID and the actual identifier of the target terminal. Then, the mapping of pseudo-ID or anonymous-ID to actual identifier is performed. The H-SLP 707 does not deliver the actual identifier of the target terminal 709 to all external entities connected when obtaining the position value of the target terminal 709, and the pseudo-generated temporarily by the H-SLP 707. Use ID or anonymous-ID. In the present invention, when the target terminal 709 is roaming, the pseudo-ID or anonymous-ID is transmitted to the location server (V-SLP) 705 existing in the visited network of the target terminal 709. However, when the home location server (H-SLP) 707 communicates with an external entity existing outside the home network even without the roaming case, the home location server (H-SLP) 707 does not transmit the actual identifier of the target terminal, Of course, a pseudo-ID or an anonymous-ID may be generated to use the generated pseudo-ID or anonymous-ID instead of the actual identifier of the target terminal 709.

E. When the target terminal 709 is roaming, the H-SLP 707 V-Suppresses a RLP SSRLIR (SUPL Start Roaming Location Initiation Request) message for starting the location information service of the currently roaming target terminal 709. Send to SLP 705. The H-SLP 707 generates a SUPL Start Message. At this time, the SET Session-ID portion of the SUPL Start message is left blank. As such, the H-SLP 707 informs the V-SLP 705 that this session is a Network Initiated case.

F. The V-SLP 705 sends an RLP SSLOIA (Roaming Location Protocol SUPL Start Roaming Location Initiation Answer) message to the H-SLP 707 when the preparation of the SUPL location calculation process requested by the H-SLP 707 is completed.

G. The H-SLP 607 transmits a SUPL POS INIT message for requesting a location session start request using SUPL to the target terminal (SET) 709 using WAP PUSH or SMS. The SUPL POS INIT message includes a Session-ID for indicating a session created between the H-SLP 707 and the target terminal 709. At this time, the Session-ID includes an SLP Session-ID portion for the H-SLP 707 and a SET Session-ID for the target terminal 709. The SLP Session-ID portion may be a Session-ID sequentially generated by the H-SLP 707 and may be identifier information indicating the H-SLP 707. This identifier information may be IP address information or fully qualified domain name (FQDN) information. The SET Session-ID portion may have a Session-ID generated and sequentially generated by the target terminal 709, and may have a unique identifier indicating the target terminal 709. This identifier information may be unique MSISDN, MDN, IMSI, IP address information, etc. of the target terminal 709. The H-SLP 707 already knows in step D that the target terminal 709 is roaming out of the home network. Therefore, the H-SLP 707 generates a pseudo-ID or an anonymous-ID as a virtual ID of the target terminal 709, and transmits the temporary ID to the target terminal 709 by including the temporary ID in the SUPL POS INIT message. The H-SLP 707 directly inserts the generated virtual ID into the SET-Session-ID portion of the Session-ID of the SUPL POS INIT message and transmits it, or includes the virtual ID in a separate area of the SUPL POS INIT message. Can transmit The H-SLP 707 may include the P-mode parameter in the SUPL POS INIT message to inform the target terminal 709 to use the virtual ID of the target terminal 709 during the currently connected session. The P-mode informs the H-SLP 707 to use the virtual ID instead of its actual identifier to the target terminal 709. P-mode is 1 bit or 1 byte in size. If the value is 1, the virtual ID is used, and if it is 0, the actual identifier is used. The SUPL POS INIT message includes information (posmthod) about the location calculation method and protocol that the H-SLP 707 can support. In addition, the SUPL POS INIT message may include an SLP mode. The SLP mode indicates whether the location server for calculating the location value of the target terminal 709 is a proxy mode or a non-proxy mode. Whether the proxy mode or the non-proxy mode can be determined according to whether the location server is divided into a location value calculation unit (SPC) and a location service management unit (SLC).

The target terminal 709 receiving the H. SUPL POS INIT message starts a data communication connection with the H-SLP 707.

I. The target terminal 709 transmits a SUPL POS INIT message to the H-SLP 707. This message includes the Session-ID, the LID containing information about the network where the current target terminal 709 is located, and the SET capability. The target terminal 709 inserts the virtual ID included in the SUPL POS INIT message into the SET Session-ID portion of the Session-ID. The target terminal 709 examines the p-mode sent by the location server and, for example, checks the virtual ID when the p-mode value is 1, hides the real identifier of the target terminal 709 and hides the virtual ID during the currently connected session. Will be used. The target terminal 709 uses the virtual ID instead of its actual ID for all subsequent message transmissions. Then, the SUPL POS INIT message with the virtual ID inserted is transmitted. The message includes a Session-ID in which a virtual ID is inserted, an LID including information on a network in which the target terminal 709 is located, and a SET capability. The LID represents a location ID, that is, network information, and may be a Cell ID or an Access ID of a WLAN or a WirelessLocal Area Network (WiMAX). The SET capability includes information (posmethod) about a location calculation method and protocol that the target terminal 709 can support.

J. The H-SLP 707 transmits a SUPL POS INIT message sent from the target terminal 709 to the V-SLP 705 using a RLP-SSRP (SUPL START Roaming Position) message.

K. The V-SLP 705 compares the SET capability of the SUPL POS INIT message included in the RLP-SSRP message with the position calculation method supported by the V-SLP 705 to finally calculate the position to be used during the currently used session. Determine the method and protocol. This determined location calculation method and protocol is forwarded to the target terminal 709. The V-SLP 705 and the target terminal 709 exchange messages required for the location calculation process. At this time, the H-SLP 707 serves to deliver a message exchanged between the target terminal 709 and the V-SLP 705.

When the position value calculation of the target terminal 709 is completed, the V-SLP 705 sends the H-SLP 707 the position value of the target terminal 709 and the SUPL END message to be sent to the target terminal 709. .

The M. H-SLP 707 forwards the SUPL END message to the target terminal 709. The H-SLP 707 and the target terminal 709 terminate the current session.

N. The H-SLP 707 retrieves the actual identifier corresponding to the virtual ID of the target terminal 709 from the currently stored mapping information (for example, the mapping table), and the H-SLP 707 calculates the calculated value. The position value of the target terminal 709 is transmitted to the R-SLP 703. The R-SLP 703 transmits the position value of the target terminal 709 to the SUPL Agent 701.

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.

A. SUPL Agent 801 sends an MLP TLRR message to start the trigger service.

B. The H-SLP 811 has an actual identifier of the target terminal 809 and determines whether the target terminal 809 is currently roaming. In addition, when the target terminal 809 is currently roaming, the H-SLC 805 of the H-SLP 811 is virtual to prevent the actual identifier of the target terminal 809 from being exposed to the external network outside the home network. Generate ID. The virtual ID may be a pseudo-ID or an anonymous-ID. The H-SLC 805 uses the generated virtual ID until the currently connected session ends. The virtual ID of the target terminal 809 and mapping information of the actual identifier are stored. When the H-SLC 805 of the H-SLP 811 obtains the position value of the target terminal 809, the H-SLC instead of the actual identifier of the target terminal 809 to all external entities to be connected. 805 delivers the temporary generated virtual ID. Since an embodiment of the present invention assumes that the target terminal 809 is roaming to the visited network, the target terminal 809 is roaming to the visited network. Pass ID. However, when the home location server (H-SLP) communicates with an external entity existing outside the home network in addition to the roaming case, it is not necessary to convey the actual identifier of the target terminal 809 in a manner similar to the present invention. Of course, the H-SLP 811 may generate a virtual ID of the target terminal 809 and use it instead of the actual identifier of the target terminal 809. In addition, although the H-SLP 811 generates the virtual ID of the target terminal 809 in the presently described embodiment of the present invention, an entity other than the H-SLP 811 (for example, the target terminal itself) is the target. The virtual ID of the terminal 809 may be generated to be used instead of the actual identifier of the target terminal 809 during the location calculation process. Alternatively, the authorized third entity may generate the virtual ID of the target terminal 809 and manage the real identifier and the virtual ID.

C. When the H-SLC 805 receives a triggered location service request from the SUPL Agent 801, the H-SLC 805 delivers the triggered location service request to the H-SPC 807. At this time, the H-SLC 805 transmits the virtual ID to the H-SPC 807 instead of the actual identifier of the target terminal 809. The virtual ID may then be used in the H-SPC 807 to distinguish the target terminal 809.

D. The H-SLC 805 transmits a SUPL POS INIT message to the target terminal (SET) 809 using a method such as WAP PUSH or SMS to notify that the location information providing service using SUPL is started. The SUPL POS INIT message includes a Session-ID representing a session created between the H-SLC 805 and the target terminal 809. At this time, Session-ID is composed of SLC Session-ID and SET Session-ID. The SLC Session-ID portion may include a Session-ID generated and sequentially generated by the H-SLC 805, and may include identifier information indicating the H-SLC 805. This identifier information may be IP address information or fully qualified domain name (FQDN) information. The SET Session-ID portion may have a Session-ID generated and sequentially generated by the target terminal 809, and may have a unique identifier indicating the target terminal 809. This identifier information may be unique MSISDN, MDN, IMSI, IP address information, etc. of the target terminal 809. The H-SLC 805 generates a virtual ID and transmits the virtual ID to the target terminal 809 by including it in the SUPL POS INIT message. The virtual ID is the virtual ID of the target terminal 809 generated when the H-SLC 805 determines in step B that the target terminal 809 is roaming from the home network. The H-SLC 805 may insert the virtual ID directly into the SET Session-ID portion of the Session-ID included in the SUPL POS INIT message and transmit it, or may include the generated virtual ID in a separate SUPL POS INIT message area. Can transmit The H-SLC 805 includes a P-mode parameter with a SUPL POS INIT message to inform the target terminal 809 to use the virtual ID of the target terminal 809 during the currently connected session. The P-mode is used to inform the H-SLC 805 whether to send the message to the target terminal 809 using the virtual ID instead of its actual identifier. For example, when the value of the P-mode parameter is 1 bit or 1 byte in size, if the value is 1, the virtual ID is used. If the value of the P-mode parameter is 0, the target terminal 809 distinguishes itself from the real terminal. You can set it to use the ruler. The SUPL POS INIT message includes a positioning method and protocol (posmthod) that the H-SLC 805 can support. And the SLP mode parameter, SLP mode indicates whether the location server to calculate the location value of the target terminal 809 according to the proxy mode or non-proxy mode. The determination of the proxy mode or the non-proxy mode is determined by whether the location server SLP is divided into the location value calculation unit SPC and the location request management unit SLC, and the session is independently generated.

E. The target terminal 809 establishes a data communication connection with the H-SLC 805 when a SUPL POS INIT message is received.

F. The target terminal 809 sends a SUPL Triggered start message to the H-SLC 805. In step D, the target terminal 809 determines whether to use the virtual ID through the P-mode parameter included in the SUPL POS INIT message. If the virtual ID is used, the virtual ID included in the SUPL POS INIT message is stored, and the stored virtual ID is used instead of the actual identifier in the SET Session-ID portion of the Session-ID included in the SUPL Triggered start message. . The SUPL Triggered start message includes an LID, which indicates network information (eg, cell Id) in which the target terminal 809 exists. In addition, the SUPL Triggered start message includes SET capability, which includes information on a location calculation method and protocol that the target terminal 809 can support. In addition, when performing the position calculation process of the target terminal 809, SET nonce and key ID2 used when the target terminal 809 is directly connected to the SPC (position calculation process unit) may be included.

G. The H-SLC 805 generates a security key for use when the H-SPC 807 and the target terminal 809 authenticate each other using SET nonce and key ID2.

H. H-SLP 811 (H-SLC 805 when composed of H-SLC 805 and H-SPC 807) uses the LID sent from the target terminal 809, or uses another method. Search for a location server in the network where the target terminal 809 currently exists. The H-SLP 811 sends a SUPL TRIGGERED START sent from the target terminal 805 to the visited location server (V-SLC 803). However, in the SET Session-ID portion of the Session-ID in the SUPL TRIGGERED START message sent by the target terminal 809, if the virtual ID is set by the P-mode, instead of the actual identifier of the target terminal 809. The virtual ID is included. Therefore, the V-SLC 803 in the external network can only know the virtual ID of the target terminal 809.

I. The V-SLC 803 sends an RLP Rolling Location Protocol Triggered Service Roaming Location Report Answer (TSLRA) to the H-SLP 811 in response.

J. The H-SLP 811 determines the location calculation method and protocol to be used in the location calculation process by comparing the SET capability sent by the target terminal 805 in step F with the location calculation method that can be supported. If the current SLP mode is Non Proxy mode, the H-SLP 811 transmits the address of the H-SPC 807 where the target terminal 809 will create a new session for location calculation, and transmits to the trigger service. Send the conditions to be used. Meanwhile, in step D, the H-SLP 811 transmits the virtual ID and P-mode parameter to be used in the position calculation process to the target terminal 809 in the SUPL POS INIT message. The SUPL TRIGGERED RESPONSE message may include the virtual ID and the P-mode parameter to be transmitted to the target terminal 809. This is because in the case of the trigger service, the sending of the virtual ID and the p-mode to the SUPL POS INIT message is before the trigger service permission is received from the target terminal 809, so the SUPL POS INIT message is received by the target terminal 809, and the trigger is generated. This is because if the service is denied, the currently requested trigger service may not start. Therefore, in this case, for a trigger service that may or may not be started, transmitting a large amount of data including a virtual ID and a P-mode to the target terminal 809 through a wireless environment may be a waste of resources. . Therefore, in the trigger service, the trigger service is allowed from the target terminal 809, and when the trigger service start is finally determined, additional information (eg, virtual ID, P-mode) related to the trigger service is transmitted to the target terminal 809. This can be more effective in terms of saving resources in the wireless environment. Therefore, the present invention may use the SUPL POS INIT message or the SUPL TRIGGERED RESPONSE message when the H-SLP 811 sends to the target terminal 809 to transmit the virtual ID and the P-mode.

K. The H-SLP 811 sends a message (MLP TLRA (Mobile Location Protocol Triggered Location Request Answer) message) to the SUPL Agent 801 indicating that the trigger service requested by the SUPL Agent 801 is allowed and started.

L. The target terminal 809 transmits a SUPL POS INIT message to the H-SLP 811 to start calculating the position value. This message includes a LID indicating network information in which the target terminal 809 currently exists. The target terminal 809 inserts the virtual ID received from the H-SLP 811 into the SET session-ID.

The M. H-SPC 807 requests the coarse position of the target terminal 809 using the LID to the H-SLC 805. Here, 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 position of Seoul, Incheon, etc., or Gangbuk-gu, Gangnam-gu, etc.).

N. The H-SLC 805 forwards the LID to the V-SLC 803. This is because although the LID of the target terminal 809 is acquired, the coarse position corresponding to the LID cannot be generated because the target terminal 809 is roaming in the external network. That is, for example, even if the current target terminal 809 knows the ID of the cell in which the H-SLC 805 cannot generate coarse positions because it does not have location information matching the cell ID. Therefore, the H-SLC 805 forwards the LID to the V-SLC 803 having place name information matching the LID. The virtual ID generated by the H-SLC 805 in step B or before the H-SLP 811 sends a SUPL Triggered RESPONE message to the target terminal 809 is generated. Set to send.

O. The V-SLC 803 obtains the coarse position of the target terminal 809 using the received LID. The result is then transmitted to the H-SLC 805. In this case, a virtual ID is used for the identifier of the target terminal 809.

P. The H-SLC 805 delivers the coarse position received from the V-SLC 803 to the H-SPC 807. At this time, the virtual ID generated by the H-SLC 805 is used as the identifier of the target terminal 809.

Q. The H-SPC 807 and the target terminal 809 calculate the position value using the coarse position information while using the virtual ID as the identifier. For example, when the A-GPS method is used to calculate the position value of the target terminal 809 in an embodiment to which the present invention is applied, the coarse position information calculates the position value of the target terminal 809. Can be used as information for selecting GPS satellites.

R. When the H-SPC 807 is in the SET-assisted mode for calculating the position value of the target terminal 809, the H-SPC 807 transfers the calculated position value to the target terminal 809, and thus, the target terminal. It is determined whether an event for 809 has occurred.

S. The target terminal 809 compares the target area set as a condition of the trigger service with the currently calculated location value and determines whether an area event has occurred. Types of regional events include Leaving, Entering, and Staying.

T. When a local event occurs, the target terminal 809 informs the H-SLC 805 of the fact. At this time, the currently calculated position value may be transmitted together.

U. The H-SLC 805 informs the SUPL Agent 801 that an event has occurred. At this time, the H-SLC 805 converts the virtual ID into an actual identifier of the target terminal 809 and sends the position value of the current target terminal 809 to the SUPL Agent 801 that has requested the position value of the target terminal 809. To pass.

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 target terminal 905, i.e., SUPL Agent, establishes a data communication connection to obtain its location value.

B. The target terminal 905 transmits a SUPL START message to the H-SLP 903 for the location value request. At this time, the actual identifier of the target terminal 905 is inserted into the SET Session-ID portion of the Session-ID and transmitted. In addition, the SUPL START message includes a LID indicating information of a network where the target terminal 905 is currently located. The target terminal 905 transmits to the H-SLP 903 a SET capability indicating a location calculation method and protocol that can be supported by the target terminal 905.

C. When receiving the message from the target terminal 905, the H-SLP 903 determines whether the target terminal 905 is currently roaming. When the target terminal 905 is roaming, the H-SLP 903 generates a virtual ID of the target terminal 905 because an entity outside the home network (eg, the V-SLP 901) must be used. This is because the actual identifier of the target terminal 905 is not passed to an external entity. The H-SLP 903 creates mapping information (e.g., mapping table) for mapping the virtual ID of the target terminal 905 with the actual identifier, and sets the value to the session assigned to the current location service request. Save until finished. The H-SLP 903 is responsible for converting the virtual ID of the target terminal 905 from the actual identifier. Therefore, the virtual ID generated by the H-SLP 903 becomes a temporary value indicating an identifier of a specific terminal in a specific session. In the present invention, the H-SLP 903 is responsible for generating the virtual ID of the target terminal 905 and mapping it to the actual identifier of the actual target terminal 905, but other entities besides the H-SLP 903. For example, the target terminal 905 may be responsible for generating, mapping, and managing a virtual ID. Alternatively, an external entity (for example, V-SLP 901) authorized by the H-SLP 903 generates and maps a virtual ID, which is a temporary ID that distinguishes the target terminal 905 from the currently generated session. Of course, it can play a role. In this case, a separate method may also be used such that the actual distinguisher of the target terminal 905 is not passed on to an external entity that is not authorized.

D. Since the target terminal 905 is roaming, the H-SLP 903 has a location service request message from the target terminal 905 to the location server (V-SLP 901) of the network where the target terminal 905 exists. Send (SUPL START message). In this case, the message is inserted by inserting the virtual ID generated by the H-SLP 903 instead of the actual identifier of the target terminal 905 in the SET Session-ID portion of the Session-ID included in the SUPL START message. (Or, an entity authorized by the H-SLP 903 may generate a virtual ID. Alternatively, the target terminal 905 may generate and transmit its own virtual ID. The target terminal 905 may directly transmit the virtual ID. A case of generating a virtual ID and transmitting it to the H-SLP 903 will be described with reference to FIG. 10.

E. The V-SLP 901 transmits a response message (SUPL RESPONSE message) of the corresponding location service request to the H-SLP 903.

F. The H-SLP 903 transmits a SUPL RESPONSE message to the target terminal 905 in response to the SUPL START message received in step B. In this case, the SUPL RESPONSE message transmitted by the H-SLP 903 transmits a virtual ID currently generated, and a P-mode parameter indicating that the virtual ID is used instead of the actual identifier of the target terminal 905 in a subsequent message transmission.

G. The target terminal 905 transmits a SUPL POS INIT message to the H-SLP 903 to start the position value calculation process. At this time, when the P-mode parameter exists in the SUPL RESPONSE message received in step F, and the value of the P-mode parameter uses a virtual ID, the target terminal 905 is included in the SUPL POS INIT message. In the Session-ID part, the SET Session-ID is inserted into the virtual ID received from the H-SLP 903 instead of its actual identifier. The target terminal 905 currently includes the network information, that is, LID, is included in the SUPL POS INIT message and transmitted to the H-SLP 903.

H. The H-SLP 903 receives the SUPL POS INIT message sent by the target terminal 905 and delivers it to the V-SLP 901.

I. The V-SLP 901 and the target terminal 905 exchange messages necessary for the location calculation process. At this time, the V-SLP 901 identifies the target terminal 905 using the virtual ID generated by the H-SLP 903 instead of the actual identifier of the target terminal 905. The H-SLP 903 performs a matching process between the virtual ID and the actual identifier through mapping information, and transmits the transmitted message between the V-SLP 901 and the target terminal 905.

J. When the V-SLP 901 completes the position value calculation of the target terminal 905, the V-SLP 901 transmits the calculated position value to the H-SLP 903.

K. The H-SLP 903 receives the calculated position value and transmits it to the target terminal 905. In addition, the target terminal 905 transmits a SUPL END message that informs the joy of the location information providing service.

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 target terminal 905, i.e., SUPL Agent, establishes a data communication connection to obtain its location value.

B. The target terminal 1005 generates a virtual ID to be used when the current terminal roams to the external network. The target terminal 1005 generates a SUPL START message in which the virtual ID currently generated is inserted into the SET Session-ID portion of the Session-ID. The target terminal 1005 recalls a LID indicating information of a network in which the target terminal currently exists, a SET capability indicating a location calculation method and a protocol that the target terminal 1005 can support, and a P-mode parameter indicating that a virtual ID is to be used. Insert into SUPL START message. The target terminal 1005 inserts its actual identifier into the SUPL START message in order to receive service request authentication from the H-SLP 1003. The target terminal 1005 transmits the generated SUPL START message to the H-SLP 1003 to start the position value calculation process.

C. When the H-SLP 1003 receives the SUPL START message from the target terminal 1005, the H-SLP 1003 determines whether the target terminal 1005 is currently roaming. When the target terminal 1005 is roaming, the P-mode parameter sent by the target terminal 1005 is checked to check whether the target terminal 1005 requires the use of the virtual ID. If the P-mode parameter is a value indicating the use of the virtual ID, the H-SLP 1003 stores the virtual identifier sent by the target terminal 1005 and the actual identifier of the target terminal 1005 included in the Session-ID portion. It is responsible for mapping the values to the virtual IDs. And the H-SLP 1003 is the mapping information (eg mapping table) of the actual identifier and the virtual ID of the target terminal 1005 until the current session ends (or until the currently requested location service is terminated). It stores and manages, and performs the conversion process of the actual identifier and the virtual ID.

D. Since the target terminal 1005 is roaming in the H-SLP 1003, the location service request message received from the target terminal 1005 to the location server V-SLP: 1001 of the network where the target terminal 1005 exists. Send (SUPL START message). At this time, the actual identifier of the target terminal 1005 included in the SUPL START message is deleted and transmitted.

E. The V-SLP 901 transmits a response message (SUPL RESPONSE message) of the corresponding location service request to the H-SLP 903.

F. The H-SLP 1003 and 903 transmit a SUPL RESPONSE message to the target terminal 905 in response to the SUPL START message received in step B. At this time, the P-mode parameter means that the virtual ID currently generated in the SUPL RESPONSE message transmitted by the H-SLP 1003 and 903 and the virtual ID instead of the actual identifier of the target terminal 905 in the subsequent message transmission. Send it.

G. The target terminal 1005 inserts a virtual ID instead of its actual identifier in the SET session-ID of the Session-ID included in the SUPL POS INIT transmitted to start the position value calculation. In addition, the target terminal 1005 transmits a SUPL POS INIT message including the LID which is network information existing.

H. The H-SLP 1003 and 903 receive the SUPL POS INIT message transmitted by the target terminal 905 and deliver it to the V-SLP 901.

I. The V-SLP 901 and the target terminal 905 exchange messages necessary for the location calculation process. At this time, the V-SLP 901 identifies the target terminal 905 using the virtual ID generated by the H-SLP 1003 903 instead of the actual identifier of the target terminal 905. The H-SLP 1003 and 903 perform a matching process between the virtual ID and the actual identifier through mapping information, and transmit the transmitted message between the V-SLP 901 and the target terminal 905. do.

J. When the V-SLP 901 completes the position value calculation of the target terminal 905, the V-SLP 901 transmits the calculated position value to the H-SLP 1003 and 903.

K. The H-SLP 1003 903 receives the calculated position value and transmits it to the target terminal 905. In addition, the target terminal 905 transmits a SUPL END message that informs the joy of the location information providing service.

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 target terminal 1005 is calculated several times. Of course. Accordingly, the scope of the invention is not to be determined by the embodiments described, but should be determined by equivalents of the claims and the appended claims.

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.

Claims (39)

In the Home-SUPL Location Server (Home-Secure User Plane Location Location server) to provide the location information of the target terminal, Receiving a location service request message including an actual ID of the target terminal and an ID of a location value requester; Generating a virtual ID corresponding to the actual ID of the target terminal; Generating a SUPL INITation message including a virtual ID for starting a location session; Transmitting the generated SUPL INIT message to the target terminal; Receiving a SUPL POS INIT message for starting a position value calculation including the virtual ID in response to the SUPL INIT message; Distinguishing the target terminal by using the virtual ID and calculating a position value of the target terminal; And transmitting the calculated position value to the requester of the position value. The method of claim 1, wherein generating the virtual ID comprises: The target terminal position calculation method for privacy protection of the target terminal user, characterized in that the process of obtaining through the Privacy Control Entity (PCE) using the real ID. The method of claim 1, The real ID is, Use the same contents of SET Session-ID as defined in OMA TS ULP V2.0. The virtual ID is, A target terminal location calculation method for privacy protection of a target terminal user, characterized by using the same contents used in OMA PCP V1.0. The method of claim 1, wherein the generating of the SUPL INIT message comprises: And inserting the virtual ID into the SET Session-ID portion of the Session-ID included in the SUPL INIT message. The method of claim 4, wherein the SUPL INIT message, And an ID mode indicating whether the target terminal uses a virtual ID or an actual ID of the target terminal. The method of claim 1, wherein the SUPL INIT message, And a SLP mode indicating whether the process for calculating the location value is a proxy mode or a non-proxy mode. The method of claim 1, wherein the actual ID is, Target terminal location calculation method for privacy protection of the target terminal user, characterized in that any one of MSISDN, IMSI (International Mobile Subscriber Identity), IP address. The method of claim 1, wherein the Home-SUPL server, A method for calculating a target terminal location for privacy protection of a target terminal user, comprising a Home-SUPL Location Center (H-SLC) and a Home-SUPL Positioning Center (H-SPC). 9. The method of claim 8, After generating the virtual ID, the H-SLC further comprises the step of transmitting the generated virtual ID of the target terminal to the H-SPC target terminal location calculation for privacy protection of the target terminal user Way. The method of claim 8, wherein the calculating of the position value of the target terminal comprises: The target terminal location calculation method for privacy protection of the target terminal user, characterized in that the H-SPC is a process of calculating the position value of the target terminal. In the method for providing location information in response to a request of a target terminal in a home-SUPL location center (H-SLC), Receiving a location service request message including an actual ID of the target terminal and an ID of a location value requester; Generating a virtual ID corresponding to the actual ID of the target terminal; Transmitting a Positioning Request message (H-SPC) to a Home-SUPL Positioning Center (H-SPC) including information on the virtual ID and a position calculation method used for calculating a position value; Generating a SUPL INITation message including a virtual ID for starting a location session; Transmitting the generated SUPL INIT message to the target terminal; Receiving a SUPL POS INIT message for starting a position value calculation including the virtual ID in response to the SUPL INIT message; Receiving a position value calculation result from the H-SPC for calculating a position value of the target terminal; And transmitting the result of calculating the location value to the requester of the location value. The method of claim 11, wherein generating the virtual ID comprises: The target terminal position calculation method for privacy protection of the target terminal user, characterized in that the process of obtaining through the Privacy Control Entity (PCE) using the real ID. The method of claim 11, wherein the actual ID is, Use the same contents of SET Session-ID as defined in OMA TS ULP V2.0. The virtual ID is, A target terminal location calculation method for privacy protection of a target terminal user, characterized by using the same contents used in OMA PCP V1.0. The method of claim 11, wherein the generating of the SUPL INIT message comprises: And inserting the virtual ID into the SET Session-ID portion of the Session-ID included in the SUPL INIT message. The method of claim 14, wherein the SUPL INIT message, And an ID mode indicating whether the target terminal uses a virtual ID or an actual ID of the target terminal. The method of claim 11, wherein the SUPL INIT message, And a SLP mode indicating whether the process for calculating the location value is a proxy mode or a non-proxy mode. The method of claim 11, wherein the actual ID is, Target terminal location calculation method for privacy protection of the target terminal user, characterized in that any one of MSISDN, IMSI (International Mobile Subscriber Identity), IP address. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete
KR1020060097349A 2006-06-07 2006-10-02 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 KR101236421B1 (en)

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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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