KR101075719B1 - POSITIONING SYSTEM AND METHOD FOR SUPL(Secure User Plane Location) ENABLE TERMINAL IN SUPL ENABLE NETWORK - Google Patents

Abstract

A roaming mobile communication terminal relates to a system and method for receiving a location measurement service. The method may further include a process of requesting a roaming mobile terminal to register with a visited network, and a visited network communicating with a home network to establish a packet switched connection with the mobile communication terminal. Checking whether a mobile communication terminal uses the SUPL (Secure User Plane Location) protocol, and if the SUPL protocol is used, the mobile terminal directly communicates with a location server of the visited network to determine its own location. Characterized in that it comprises a.

Roaming, Secure User Plane Location (SUPL)

Description

POSITIONING SYSTEM AND METHOD FOR SUPL (Secure User Plane Location) ENABLE TERMINAL IN SUPL ENABLE NETWORK}             

1 illustrates a Secure User Plane Location (SUPL) enabled network connected to a packet switched network.

2 is a ladder diagram showing a conventional SET (SUPL Enable Terminal) position measurement procedure

3 is a ladder diagram illustrating a location measurement service method of a SET according to an embodiment of the present invention.

FIG. 4 illustrates a detailed process 6A of checking the SUPL protocol use authority of the SET of FIG. 3; FIG.

5 is a ladder diagram illustrating a location measurement service method of a SET according to another embodiment of the present invention.

The present invention relates to a system and method for indicating the location of a mobile communication terminal in a mobile communication system, and more particularly, to allow a mobile communication terminal to request a location service directly from a location server of a visited network without going through a location server of a home network. System and method.

The mobile communication terminal can request its location from the location server. One of several methods used to calculate the location of a mobile terminal is the A-GPS over IP (Assisted-GPS over Internet Protocol) method. According to this method, a mobile communication terminal and a location server exchange messages required in a positioning process by using a Secure User Plane Location (SUPL) protocol. Since the SUPL protocol exists at the upper level of IP, a mobile communication terminal must be connected to a packet switched network (PS) in order to request a location service using the SUPL protocol.

When the mobile terminal leaves the home network and enters the visiting network, the mobile terminal must work to connect to the PS network of the visiting network. After being connected to the PS network, the mobile terminal requests its location server from the home network using the SUPL protocol. At this time, the location server of the home network authenticates the SUPL protocol use authority of the mobile communication terminal. The location server of the home network determines that the mobile communication terminal is roaming by using a home location register (HLR), and requests a location service request of the mobile communication terminal that has moved its location to the location server of the visited network where the mobile communication terminal exists. Do it.

The roaming mobile terminal sends the location service request message to the remote location server of the home network because the roaming mobile terminal cannot determine whether to use the SUPL protocol of the roaming mobile terminal. .

1 is a diagram illustrating a SUPL enable network connected to a PS network.

The SUPL enable network refers to a network on which a SET (SUPL Enable Terminal) and a location server can perform a positioning process using the SUPL protocol.

Reference numeral 100 denotes a home network of the SET, and reference numeral 200 denotes a visited network roamed by the SET. Reference numeral 300 indicates that the SET leaves the home network 100 and moves to the visited network 200, that is, roams.

Looking at the configuration of the home network 100, it consists of SET 50, RAN1 51, Serving GPRS Support Node (SGSN) 1 52, HLR 53, and Home SUPL Location Platform (H-SLP) 54. SET 50 is a mobile communication terminal capable of requesting location services using the SUPL protocol. The H-SLP 54 is a location server in the home network 100, and can provide location services using the SUPL protocol.

Looking at the configuration of the visited network 200, it consists of SET 50, RAN2 58, SGSN2 57, VLR 55, and V-SLP (Visited SUPL Location Platform) 56. SET 50 indicates that we have moved from the home network 100, so the same reference numerals are used. The V-SLP 56 is a location server capable of providing location services using the SUPL protocol.

The interface between the components can refer to the packet switched network configuration and interface of the General Packet Radio Service (GPRS) or Universal Mobile Tele-communication System (UMTS) described in 3rd Generation Partnership Project (3GPP) 23.060 and 23.271. Detailed description will be omitted.

2 is a ladder diagram illustrating a conventional SET position measurement procedure.

SET 50 roaming in step 1 sends a registration request to SGSN2 57 to establish a PS connection to the visiting network. The registration request message contains an International Mobile Subscriber Identity (IMSI).

In step 2, the SGSN2 57 sends an authentication information message to the Home Location Register (HLR) 53 of the home network to determine whether the SET 50 is authenticated. At this time, the authentication is to determine whether to allow or disable the PS connection of the visited network to SET 50. The SGSN2 57 receives an authentication info acknowledgment message from the HLR 53, which indicates whether the SET 50 is roaming successfully or unsuccessfully. At this time, if authentication is successful, SET 50 sets SGSN2 57 to PS connection.

In step 3, the SGSN2 57 sends an update location message to the HLR 53, which includes the SGSN address 57 and the IMSI.                         

In step 4, HLR 53 sends subscriber data to SGSN2 57, which includes IMSI and GPRS subscriber data.

In step 5, SGSN2 57 sends a Location Update Request message to inform VLR 55 of the path of roaming SET 50.

In step 6, a location update operation is performed between VLR 55 and HLR 53. As a specific example, VLR 55 sends an update location message (IMSI, VLR) to HLR 53. Upon receipt of this, HLR 53 sends subscriber data (including IMSI) to VLR 55. Upon receipt of this subscriber data, VLR 55 sends a subscriber data response to HLR 53. In other words, this response is to inform the path update of SET 50.

In step 7, the VLR 55 receiving the response sends a location update accept / Mobility Management (MM) information message to the SGSN2 57. This MM information message includes IMSI.

In step 8, SGSN2 57 sends a registration accept message to SET 50 indicating that it has successfully connected to the PS. SGSN2 57 also carries MM information received from VLR 55.

In step 9, the SET sends a SUPL_START message (sessionid, SET capability, lid ..) to the H-SLP 54 for session connection. After checking whether SET 50 has the authority to use SUPL protocol, H-SLP 54 checks the contents of SUPL_START message in step 9A and steps 10 and 11 according to the type of network to which SET 50 belongs (eg 3GPP or 3GPP2). (If 3GPP) or perform steps 12 and 13 (for example, 3GPP2).

In step 10, a response message, that is, a SUPL-RSP message (session-id) is sent to SET 50. Subsequently, in step 11, a message for starting positioning, that is, a SUPL_POS INIT message (session-id) is sent.

In step 12, H-SLP 54 determines the nearest V-SLP 56. The H-SLP 54 sends a RLP Roaming Location Protocol Start Roaming Location Initiation Request (RLP SRLIR) message to the V-SLP 56. The H-SLP 54 sends the V-SLP 56 with information such as id (msid), seession-id and session start of SET 50 in the RLP SRLIR message.

In step 13, the V-SLP 56 sends an RLP SRLIA (Roaming Location Protocol Start Roaming Location Initiation Answer) to the H-SLP 54.

After performing step 11 or step 13, in step 14, V-SLP 56 and SET 50 perform a positioning operation (SUPL_POS) to obtain the position value of SET 50. The double arrow in 14-1 indicates the RLP between V-SLP 56 and H-SLP 54 when H-SLP 54 is involved in the positioning task between V-SLP 56 and SET 50.

When the location of SET 50 is determined, in step 15, the V-SLP 56 sends an HLP SIRE 54 a Roaming Location Protocol Start Roaming Location Initiation Response (RLP SRLIREP) to terminate the session with the H-SLP 54. In step 16, the V-SLP 56 sends a positioning completion message, that is, a SUPL_END message (session-id), to the SET 50 to terminate the session.

However, despite the fact that SET 50 is responsible for the location service request, V-SLP 56 does not send the service request message directly to the V-SLP 56. The configuration to transmit to the network not only complicates the service path but also complicates the configuration of the system.

The present invention provides a system and method for allowing a roaming mobile terminal to directly request a location service request from a location network of a visited network without passing through a location server of a home network.

To this end, the first aspect of the present invention provides a mobile communication terminal capable of receiving a location measurement service, a home network having information on whether the mobile communication terminal uses a secure user plane location (SUPL) protocol, and the mobile terminal. When the communication terminal roams and requires registration, when the packet exchange connection is made with the mobile communication terminal, the communication terminal communicates with the home network to obtain information on whether the mobile communication terminal uses the SUPL protocol, and provides the information to the mobile communication terminal. And a visited network, and if the authority to use the SUPL protocol is confirmed, after the packet switched connection, the mobile communication terminal and the location server of the visited network communicate directly to determine the location of the mobile communication terminal. .

To this end, the second invention relates to a process in which the roaming mobile communication terminal requires registration with a visited network, the visited network communicating with a home network to establish a packet switched connection with the mobile communication terminal, and the packet switched connection processing. Checking whether the mobile communication terminal has a SUPL protocol use authority from the home network, and if the SUPL protocol use authority is present, the mobile communication terminal directly communicates with a location server of the visited network to determine its location Characterized in that it comprises a.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used for the same reference numerals even though they are shown in different drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The SUPL enable network connected to the packet switched network to which the present invention is applied is as shown in FIG.

3 is a ladder diagram illustrating a location measurement service method of SET 50 according to an embodiment of the present invention.

After roaming in step 1, SET 50 sends a registration request to SGSN to establish a PS connection to the visiting network. The registration request message contains the IMSI.

In step 2, the Serving GPRS Support Node (SGSN2) sends an authentication information message (Authentication info) to the HLR 53 (Home Location Register) of the home network to determine whether the SET 50 authentication (authentication). At this time, the authentication is to determine whether to allow or disable the PS connection of the visited network to SET 50. The SGSN receives an authentication info acknowledgment message from HLR 53, which indicates whether the SET 50 is roaming successfully or unsuccessfully. If authentication is successful, SET 50 and SGSN2 57 make PS connection.

In step 3, the SGSN2 57 sends an update location message to the HLR 53, which includes the SGSN address 57 and the IMSI.

In step 4, the HLR 53 sends subscriber data to the SGSN2 57, which includes IMSI and GPRS subscriber data.

In step 5, SGSN2 57 sends a Location Update Request message to inform VLR 55 of the path of roaming SET 50.

In step 6A, work is performed between VLR 55 and HLR 53 for location updates and SUPL protocol permissions.

4 is a diagram illustrating in detail the process 6A of checking the SUPL protocol use authority of SET 50 of FIG. 3.

In step 6A-1, an update location and a VLR 55 service type message (IMSI, VLR 55) are sent. HLR 53 checks the user profile corresponding to IMSI to check whether the user has permission to use the SUPL protocol.

In step 6A-2, the HLR 53 analyzes the update location message to check the SUPL protocol usage authority of SET 50, and checks the type of VLR 55 service authorized in the SET 50. In step 6A-3, it is determined whether the result of the check determines that the user has the authority to use the SUPL protocol. If the user does not have the authority to use the SUPL protocol, in step 6A-4, the user requests to confirm whether to join the GUP (Generic User Profile) (not shown). . In step 6A-5, a subscription confirmation response is received from the GUP.

The HLR 53 or the HSS has the IMSI or Mobile Station ISDN of the SET 50 included in the update location message and checks the SUPL protocol usage authority of the SET 50 among the subscriber information in the HLR 53 or the HSS. However, if there is no service subscription information on the use of the SUPL protocol of SET 50 in the HSS or HLR 53, the GUP may request whether to subscribe to the SUPL service using the corresponding IMSI or MSISDN and receive the result.

If it is determined that the authority to use the SUPL protocol in step 6A-3 or "OK" is received from the GUP in step 6A-5, in step 6A-6, the SUPL protocol permission indicator and the VLR 55 The authorization indicator for each service type is transmitted to the VLR 55 together with the subscriber data. However, at this time, the permission indicator for each service type of the VLR 55 is not related to location determination even if it is not transmitted.

In step 6A-7, SET 50 sends a subscriber data response message to HLR 53, and in step 6A-8, HLR 53 sends an update location response to VLR 55. In step 6A-9, the VLR 55 examines the SUPL protocol permission and the service type permission indicator of the VLR 55.                     

HLR 53, on the other hand, exists in the HSS and has subscriber information. Therefore, the information that HLR 53 has is also HSS, and information that is not present in HLR 53 can be given to HLR 53 by HSS.

Referring back to FIG. 3,

At 6B, VLR 55 checks the usage rights and if so, sends SGSN2 57 location renewal accept / MM information (including IMSI, V-SLP address) in step 7A, SGSN2 57 accepts registration accept / MM information (IMSI, at 8A). V-SLP address) is sent to SET 50. On the other hand, if you do not have permission, proceed to step 7B to send a Location Update Accept / MM Information (IMSI) message to SGSN2 57, and SGSN2 57 sends a Registration Accept / MM Information (IMSI, V-SLP Address) message to SET 50 at 8B. Send to

Here, the registration acceptance message is for notifying that the SGSN2 57 has successfully connected the SET 50 to the PS. The MM information is for the VLR 55 to convey to the SET 50 via SGSN2 57 that the route has been stored in the VLR 55 after the roaming SET 50 has successfully made the visit PS connection. This allows SET 50 to know the V-SLP address contained in the MM information.

In step 17, the V-SLP 56 requests authentication from the VLR 55 for authentication of the SUPL protocol permission of SET 50.

The subscriber profile of the SUPL protocol usage authority for each user of V-SLP 56 and the SUPL protocol subscriber profile of VLR 55 are always updated to maintain the same identity. Therefore, V-SLP 56 and VLR 55 periodically request and transmit profile information of SUPL protocol subscriber. Alternatively, if a change in the SUPL protocol subscriber profile occurs, it can be exchanged.

In step 18, the VLR 55 sends a Request Authentication Ack to the V-SLP 56.

In step 9, SET 50 sends a SUPL-START message (sessionid, SET 50 capability, lid ..) to V-SLP 56 for session connection. In step 9A, the V-SLP 56 understands the contents of the SUPL_START message and performs steps 10 and 11 (if 3GPP) depending on the type of network to which SET 50 belongs (eg 3GPP or 3GPP2), or steps 14 and 16 ( Example: 3GPP2).

In step 10, a response message, that is, a SUPL-RSP message (session-id) is sent to SET 50. Subsequently, in step 11, a message for starting positioning, that is, a SUPL_POS INIT message (session-id) is sent.

In step 14, V-SLP 56 and SET 50 perform the positioning operation (SUPL_POS) to obtain the position value of SET 50. In step 16, the V-SLP 56 sends a positioning completion message, that is, a SUPL_END message (session-id), to the SET 50 to terminate the session.

5 is a ladder diagram illustrating a location measurement service method of SET 50 according to another embodiment of the present invention.

Compared with FIG. 4 described above, only the authentication operation between the VLR 55 and the V-SLP 56 corresponding to the 17th and 18th steps in FIG. 4 is performed after the 9th step. However, as shown in FIG. 5, in step 17A, the V-SLP 56 makes an authentication request to the VLR 55, and in step 18A, the VAR 55 transmits an authentication request response to the V-SLP 56.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

When the mobile terminal enters the roaming area and establishes a PS connection with the visited network, the mobile terminal receives the SUPL protocol usage authority of the mobile communication terminal from the home network so that the location server of the visiting network has the SUPL protocol usage authority of the roaming mobile terminal. By making it possible to determine the efficiency of the service, the efficiency of service provision paths and the system configuration can be simplified. In other words, the mobile communication terminal may make a SUPL protocol location service request directly to the location server of the visited network, without having to go through the location server of the home visited network.

Claims (11)

A home network system for providing a location measurement service of a roaming mobile communication terminal, A location server for providing location services using the Secure User Plane Location (SUPL) protocol; A home location register (HLR) holds information on whether the mobile terminal has a right to use the Secure User Plane Location (SUPL) protocol, and checks whether the mobile terminal uses the SUPL protocol. Home network system, including a register. The home network system of claim 1, wherein the HLR checks the SUPL protocol usage authority by using a user profile received from a visited location register (VLR) of the visited network system. In a visiting network system for providing a location measurement service of a roaming mobile communication terminal, A location server for providing location services using the Secure User Plane Location (SUPL) protocol; When the mobile communication terminal roams and requests registration, the mobile communication terminal communicates with a home network system to receive information on whether the mobile communication terminal is authorized to use the SUPL protocol when packet-switched connection with the mobile communication terminal occurs, and uses the received SUPL protocol. And a visited location register (VLR) for providing information on the presence or absence of authority to the mobile communication terminal. The VLR of claim 3, wherein the VLR transmits information including the location server address to the mobile communication terminal when the mobile communication terminal has the authority to use the SUPL protocol. And the information including the location server address is referenced when the mobile communication terminal directly connects with the location server of the visited network system. In the method of providing a location measurement service of a roaming mobile communication terminal, A process of checking whether a home location register (HLR) of a home network system uses the SUPL protocol of the mobile communication terminal; And transmitting, to the visited location register (VLR), a visited location register (VLR) of the visited network system by the HLR. The process of claim 5, wherein the HLR checks whether the mobile communication terminal is authorized to use the SUPL protocol. And the HLR checks whether the mobile communication terminal uses the SUPL protocol using a user profile received from the VLR of the visited network system. The process of claim 5, wherein the HLR checks whether the mobile communication terminal is authorized to use the SUPL protocol. The HLR receiving an update location message from the VLR; Checking, by the HLR, the update location message and using the SUPL protocol of the mobile communication terminal; If the test result indicates that the SUPL protocol use authority is included, transmitting the SUPL protocol use permission indicator together with subscriber data to the VLR, And the SUPL protocol use permission indicator is checked by the VLR. The process of claim 5, wherein the HLR checks whether the mobile communication terminal is authorized to use the SUPL protocol. The HLR receiving an update location message and a service type of the VLR from the VLR; Inspecting, by the HLR, the update location message to check the SUPL protocol usage authority of the mobile communication terminal, and checking the service type of the VLR authorized to the mobile communication terminal; If it is determined that the SUPL protocol use authority is included, transmitting the SUPL protocol use permission indicator and the permission indicator for each service type of the VLR together with subscriber data to the VLR, The SUPL protocol use permission indicator and the permission indicator for each service type of the visited location register are examined by the VLR. In the method of providing a location measurement service of a roaming mobile communication terminal, Performing a packet-switched connection with the mobile communication terminal when a visited location register (VLR) of the visiting network system receives a registration request from the roaming mobile communication terminal; Communicating with a home network system to receive information regarding whether the mobile communication terminal is authorized to use SUPL protocol; And providing the mobile communication terminal with information on whether the received SUPL protocol is used. 10. The method of claim 9, The VLR further includes transmitting information including the location server address of the visited network system to the mobile communication terminal, if the mobile communication terminal has the authority to use the SUPL protocol. And information including the location server address of the visited network system is referenced when the mobile communication terminal directly connects with the location server of the visited network. In the method of providing a location measurement service of a roaming mobile communication terminal, Requesting registration from the visited network system by the mobile communication terminal; In response to the registration request, receiving information regarding whether the mobile communication terminal is authorized to use the SUPL protocol from a home location register (HLR) of a home network system through a visited network system; And if the mobile terminal is authorized to use the SUPL protocol, directly connecting with the location server of the visited network, and communicating with the location server of the visited network to determine the location of the mobile communication terminal.

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