KR100914208B1 - System and method for providing location service by interworking between wlan and mobile communication network - Google Patents

Abstract

The present invention relates to a system and method for providing a location information service of a WLAN terminal through interworking between a wireless local area network (WLAN) and a mobile communication network, wherein the location server is located with the WLAN terminal when location tracking is requested from the WLAN terminal. Calculate the location of the WLAN terminal by performing the measurement procedure and register it with the AAA server or the HSS / HLR, and if the location of the WLAN terminal is requested from the external client, the location value of the WLAN terminal previously stored or provided from the AAA server or the HSS / HLR To the client.

WLAN terminal, location information service, interworking between WLAN and mobile communication network

Description

SYSTEM AND METHOD FOR PROVIDING LOCATION INFORMATION SERVICE THROUGH BLANK AND MOBILE COMMUNICATION NETWORK {SYSTEM AND METHOD FOR PROVIDING LOCATION SERVICE BY INTERWORKING BETWEEN WLAN AND MOBILE COMMUNICATION NETWORK}

1 is a signal flow diagram illustrating a SUPL procedure in a SUPL-based location information system.

2 is a view showing the configuration of a location information service providing system according to the present invention.

3 is a diagram illustrating a method for providing location information service through interworking between a WLAN and a mobile communication network according to the present invention;

******* Description of the symbols for the main parts of the drawing ********

10: WLAN terminal 20: WLAN AN

30: mobile communication network 31: location server (GMLC)

32: AAA Server 33: HSS / HLR

34: PPR 35: OCS

36: WAG 37: PDG

40: Client

The present invention relates to a location information system, and more particularly, to a system and method for providing a location information service through interworking between a mobile communication system and a wireless local area network (WLAN).

In general, a mobile communication system includes a related function for calculating a location of a terminal in a mobile communication network, and provides a location service for transmitting a location of a terminal to a certain entity periodically or on request. have. The network structure related to the location service is different depending on the internal structure of the 3GPP network or the 3GPP2 network.

In the mobile communication system, a method of calculating the current location of a mobile terminal includes a cell-id method of transmitting an id of a cell to which a mobile terminal belongs, and a triangulation measurement after measuring a time when radio waves arrive from each mobile terminal to each base station. To calculate the position of the mobile terminal and a method using a global positioning system (GPS).

However, in order to provide the location service to a user, considerable signaling and location information must be transferred between the mobile terminal and the location server. Recently, standardized location technologies for providing location services, that is, location services based on the location of a mobile terminal, are rapidly spreading. Such technologies may be provided through a user plane and a control plane. As an example of the technology, a secure user plane location (SUPL) providing a location service through the user plane is known.

The SUPL is an efficient method of transmitting location information necessary for calculating a location of a mobile terminal. The SUPL is related to positioning technology between a mobile terminal and a network and for transferring location assistance information such as GPS assistance. Use a user plane data bearer to carry the protocol.

In addition, the SPUL network related to the location service in the location information system includes a SUPL agent, an SLP (SUPL Location Platform), a SET (SUPL Enabled Terminal), and the like.

The SUPL agent represents a logical service access point that uses actual measured location information, and the SLP represents a SUPL service access point of a network portion that accesses network resources to obtain location information. The SET is a device capable of communicating with a SUPL network using a SUPL interface and supports procedures defined in SUPL in association with the network through a user plane bearer. Preferably, the SET is one of a user terminal (UM) of UMTS, a mobile station (MS) of GSM, an MS of IS-95 and a laptop computer or personal digital assistants (PDA) incorporating SET functions. Can be. In addition, the SET may be various mobile terminals connecting through a WLAN.

In the location information system, a network originally registered by a user is called a home network, and when a user moves and is located in an area other than the home network area, the network of the corresponding area is called a visited network. In addition, SLP in a home network is referred to as Home-SLP (H-SLP) and SLP in a visited network as V-SLP (Visited-SLP). In this case, when the network starts the SUPL procedure, the first SLP to which an external client accesses is called a requesting SLP (R-SLP), which may or may not be the same as the H-SLP as a logical entity. It may be. The SET aimed at tracking the current position is called a target SET.

The SLP, which is a network element, serves as a role of an SLP (SUPL Positioning Center), which is an entity for calculating actual location information, and an SLP other than calculating location information, for example, roaming and resource management. It is composed of SLC (SUPL Location Center) that plays a role of, etc., the SET may calculate the location information through communication with the SPC via the SLC (Proxy mode), and establish a direct connection with the SPC to calculate the location information It may also be in a non-proxy mode.

In general, a SUPL-based location information system includes a SUPL agent 1, an SLP 3, and a destination SET 5. Here, the SLP 3 represents a location server, and the SET 5 represents a destination terminal, respectively.

FIG. 1 is a signal flow diagram illustrating a SUPL procedure in a general SUPL-based location information system. In the proxy mode and not roaming, FIG. 1 illustrates a procedure for requesting location information of a specific terminal by a network.

As shown in Fig. 1, when a SUPL agent on SET 5 receives a location tracking request from an application of SET, SET 5 is a packet data network if it is not currently established with a data connection with any network. (eg, 3GPP or 3GPP2) requests a data connection (S10).

Once the data connection is made, the SET 5 transmits a SUPL START message to the SLP in order to start a positioning session (S11). In this case, the SUPL START message includes a session-id, a location identifier (lid), a quality of position (QoP), and SET Capabilities. Here, Qop represents position tracking accuracy (temporal delay and spatial accuracy). In addition, the SET Capabilities include supporting location measuring methods (e.g., SET-Assisted A-GPS, SET-Based A-GPS) and related positioning protocols (e.g., RRLP, RRC, TIA-801).

When the SUPL START message is received, the SLP 3 checks if the previously calculated position meets the required QoP. If the check result indicates that the previously calculated position satisfies the required QoP, the SLP 3 proceeds to step S16 and transmits the previously calculated position to the SET 5 through the SUPL END message. Using the routing information, it is checked whether the SET 5 is SUPL roamed (S12).

If the SET 5 is not currently roamed as a result of the check, the SLP 3 includes a posmethod and a session-id to be used in the SUPL RESPONSE message and transmits it to the SET 5 (S13).

SET (5) receiving the SUPL RESPONSE message transmits a SUPL POS INIT message to SLP (3) to start the actual position tracking related procedure (S14).

Thus, the SLP 3 and SET 5 exchange successive messages to perform actual position tracking and the SLP 3 or SET 5 determines the position of SET 5 via the successive messages. Calculate (S15). At this time, the SUPL POS INIT message includes at least session-id, lid and SET Capabilities, and the messages exchanged between the target SET 5 and the SLP 3 are session-id and protocol to be used for location tracking. , RRC or TIA-801).

The position calculation of the SET may be performed based on the measured value received by the SLP from the SET (SET-assisted mode), or may be performed based on the assistance obtained by the SET from the SLP (SET-based mode). FIG. 1 shows a case in which the position calculation is performed by the SET based mode. If the position calculation is performed by the SET assisted mode, the SLP should transmit the position value calculated by the SET using the SUPL END message.

When all of the above-described positioning procedures are completed, the SLP sends a SUPL END message to the SET to inform the end of the positioning session (S16), and the SET terminates the IP connection with the SLP and the positioning session. Release all resources associated with it.

Recently, the Internet service using the Wireless Local Area Network (WLAN) is popularized so that users who have a WLAN terminal in an area where WLAN is not supported can access the WLAN through a mobile communication network and receive Internet service. There is a growing interest in technology. Such technology is called Interworking-WLAN (I-WLAN) in mobile communication network (eg, 3GPP), and provides various additional services such as location information service through interoperability (WLAN). The purpose is to provide.

However, since there is no network structure and protocol for providing location information service in a general interworking system between a WLAN and a mobile communication network, there is a problem that a WLAN user cannot receive location information service through a mobile communication network.

Accordingly, an object of the present invention is to provide a location information service providing system and method for providing a location tracking service for a WLAN user in a network structure for interworking between a WLAN and a mobile communication system.

In order to achieve the above object, a location server provides a location service through the interworking between a wireless local area network (WLAN) and a mobile communication network, the location information service providing method according to the present invention, from the target terminal Calculating a location of a target terminal by performing a SUPL procedure when location tracking is requested; Registering the calculated position value with a serving node to which a target terminal belongs; Checking whether the location server has previously stored the location value of the destination terminal when a location of the destination terminal is requested from the client; If the position value of the target terminal is stored in advance and the position value satisfies the Quality of Position (QoP) requested by the client, directly transmitting the position value to an external client without performing direct communication with the serving node. It includes.

Preferably, the target terminal is characterized in that the WLAN terminal.

Preferably, the serving node is characterized in that the AAA server or HLR / HSS.

Preferably, if the location value of the target terminal is not stored in advance, the location server receives the location value of the target terminal from the serving node and delivers it to the external client.

In order to achieve the above object, a location information service providing system according to the present invention, WLAN terminal; An AAA server for authenticating the WLAN terminal; A home subscriber server / home location register (HSS / HLR) for managing location-related information of the WLAN terminal and an AAA server address; When location tracking is requested from the WLAN terminal, the location value of the WLAN terminal calculated by the WLAN terminal and the location measurement procedure is registered in the AAA server or the HSS / HLR. It includes a location server for providing a stored location value of the WLAN terminal or the location value of the WLAN terminal registered in the AAA server or HSS / HLR to an external client.

Preferably, the location server requests a location value of the WLAN terminal using a serving node query message and receives a location value of the WLAN terminal using a serving node response message.

Preferably, the location server queries the address of the AAA server to the HSS / HLR through a serving node query message to obtain the address of the AAA server, and then uses the location registration message to calculate the location value of the WLAN terminal to the AAA server. Register.

Preferably, the location server registers the location value of the WLAN terminal by transmitting the location value of the WLAN terminal to the serving node query message to the HSS / HLR.

Preferably, the location server requests the location value of the WLAN terminal to the AAA server or the HSS / HLR when the location server does not store the calculated location value of the WLAN terminal.

Preferably, the location server stores the calculated position value of the WLAN terminal when the position of the WLAN terminal is requested from an external client and the position server satisfies the quality of position (QoP) requested by the external client. Rather than performing direct communication with AAA server or HSS / HLR, the location value is transmitted to external client.

Hereinafter, preferred embodiments of the present invention will be described in detail.

The present invention proposes a network structure and a related call flow in which a WLAN user can receive location information service through a location server of a mobile communication network when the WLAN and a mobile communication network (e.g., 3GPP) are interworked.

To this end, in the present invention, the WLAN terminal calculates its location in association with the location server in the mobile communication network structure and registers the location value in the serving node, so that the external client is connected to the serving node or the serving node. Through communication, the location information of the WLAN terminal user can be received. Preferably, the serving node represents an AAA server and / or a home subscriber server / home location register (HLR / HSS).

2 is an example of a location information service providing system according to the present invention.

2 is a network structure for providing a location information service through interworking between a WLAN and a mobile communication network, and a WLAN terminal receives a location information service through interworking with a location server in a mobile communication.

As shown in FIG. 2, the system for providing location information service according to the present invention includes a WLAN access network (30) for connecting a WLAN terminal (10) to a mobile communication network (30) and a WLAN interworking with the mobile communication network (30). WLAN Access Network (WLAN AN) 20 and a client accessing the mobile communication network 30 and requesting location information of the WLAN terminal 10 through the mobile communication network 30 or using the obtained location information. And 40. Here, the mobile communication network 30 may be a 3GPP network, for example, a PLMN (Public Land Mobile Network).

The mobile communication network 30 calculates the requested location information through the SUPL procedure with the WLAN terminal 10, and provides a location server (Gateway Mobile Location Center: GMLC) that provides the calculated location information to the client 40 ( 31); An AAA server 32 performing authentication, authorization, and accounting functions for the WLAN terminal 10; Connected to the Home Subscriber Server / Home Location Register (HSS / HLR) 33, which manages user information and the AAA server address of each user, and the location server (GMLC) 31, the user's privacy information related to the location information is displayed. A privacy profile register (PPR) 34 for storing; An online charging system (OCS) 35 that collects a fee for WLAN service of the WLAN terminal 10 in real time according to time and usage; A connection gateway (WAG) 36 for connecting the WLAN AN 11 and the AAA server 32; It is connected to the WLAN terminal 10 includes a packet data gateway (PDG) 37 for providing a packet switched service (packet switched service).

Referring to the operation of the location information service providing system according to the present invention configured as described above are as follows.

3 illustrates an embodiment of a method for providing location information service through interworking between a WLAN and a mobile communication network according to the present invention.

First, the WLAN terminal 10 selects the currently accessible WLAN AN 11 and attempts to connect with the corresponding WLAN AN 20 (S20).

When the WLAN terminal 10 is connected to the WLAN AN 11 (S21), since the WLAN AN 11 can know the initial information of the WLAN terminal 10, the AAA server 32 of the mobile communication network 30 ) Performs an authentication procedure between the WLAN terminal 10 and the WLAN AN 20 through communication with the. The authentication procedure is performed using an Extensible Authentication Protocol (EAP), and the EAP packet for the EAP authentication procedure is transmitted to the AAA server 32 of the mobile communication network 30 via the WLAN AN 20. In this case, the WLAN AN 20 may pass through an AAA proxy server to access the AAA server 32 (not shown).

In order to authenticate the WLAN terminal 10, the AAA server 32 obtains authentication information from the HLR / HSS 33. These authentication information includes key information as an authentication vector registered in advance by the AAA server 32 to authenticate the WLAN terminal 10. In addition, the AAA server 32 may receive the subscription information of the WLAN terminal 10 from the HLR / HSS 33, the subscription information is the authorization information or the permanent identity (permanent identity) of the WLAN terminal 10, For example, it includes an international mobile station / subscriber identity (IMSI) and the capability of the terminal.

When the authentication for the WLAN terminal 10 is completed, the AAA server 32 registers its address with the HLR / HSS 33 together with WLAN terminal information, for example, the permanent ID of the WLAN terminal 10.

When the WLAN terminal 10 is authenticated by the above procedure and the information of the WLAN terminal 10 is registered in the HSS / HLR 33 (S21), the WLAN terminal 10 performs packet service through the PDG 37. In order to be provided, access information (IP address) of the PDG 21 is received from the WLAN AN 11 through a DNS (domain name system) query (S22).

The WLAN terminal 10 selects one of the received IP addresses of the PDGs (selects one PDG to be connected to) to form a tunnel, ie, a TCP / IP connection, for supporting packet service between itself and the corresponding PDG. (S23). The IP address of the PDG has an address (for example, IPv4 or IPv6) similar to that of the WLAN terminal 10.

Thereafter, when the user of the WLAN terminal 10 requests a location tracking procedure through SUPL, the WLAN terminal 10 transmits a SUPL START message to the location server 31 to start a positioning session. The location server 31 receiving the SUPL START message exchanges successive messages for performing actual location tracking with the WLAN terminal 10 to calculate the location of the WLAN terminal 10 (S24).

The position calculation of the WLAN terminal 10 may be performed based on the measurement value received by the location server 31 from the WLAN terminal 10, or may be performed based on the assistance obtained by the WLAN terminal 10 from the location server. have. In FIG. 3, the location calculation is performed by the location server. If the location calculation is performed by the WLAN terminal 10, the WLAN terminal 10 transmits the calculated location value to the location server.

When the location calculation is completed, the location server 31 requests the HSS / HLR 33 for routing information of the serving node to which the WLAN terminal 10 belongs using the serving node query message (S25). In this case, the location server 31 may transmit the calculated location information of the WLAN terminal 10 to the HSS / HLR 33 through a serving node query message. Preferably, the routing information of the serving node includes an address of the AAA server 32 and capability information of the WLAN terminal 10. The capability information refers to capability information of a terminal related to location tracking, such as whether the WLAN terminal 10 supports SUPL or whether the WLAN terminal 10 supports location tracking procedures defined in mobile communication.

When the target terminal is the WLAN terminal 10, the HSS / HLR 33 displays the address of the AAA server 32 of the WLAN terminal 10 and capability information of the WLAN terminal 10 through a serving node response message. Transfer to 31 (S26). In this case, the capability information may be used to determine whether the terminal supports SUPL or a positioning method that can be supported in 3GPP or a specific communication network.

Therefore, the location server 31 transmits the location registration message to the AAA server 32 using the address of the AAA server 32 received from the HSS / HLR 33, thereby calculating the WLAN terminal 10. Transfer the position value (S27), and the AAA server 32 transmits to the position server 31 through the position registration response message to inform that the corresponding position value has been received (S28).

Thereafter, the method for requesting the location of the WLAN terminal 10 by the external client 40 can be summarized into two ways as follows.

In the first method, the location server 31 stores the location value of the target terminal, that is, the WLAN terminal 10, stored by the location server 31 or stored in the HLR / HSS 33 (or AAA server) at the request of the external client 40. There is a method of providing, and the external client 40 is directly communicated with the HLR / HSS 33 (or AAA server) to receive the position value of the WLAN terminal 10.

In the first method, when a location service (LCS) for the WLAN terminal 10 is requested from the external client 40 (S29), the location server 31 itself is calculated of the WLAN terminal 10 If the position value is stored in advance, it is checked whether the position value satisfies the Quality of Position (PoP) included in the LCS request. As a result of the check, if the location value satisfies the QoP included in the LCS request, the location value of the WLAN terminal 10 is immediately transmitted to the client 40.

On the other hand, if the calculated position value of the WLAN terminal 10 is not stored, the location server 31 stores the position value of the WLAN terminal 10 previously stored in the HLR / HSS 33 (or AAA server). After querying, the location value of the WLAN terminal 10 received from the HLR / HSS 33 (or AAA server) is transmitted to the client 40.

That is, the location server 31 transmits the serving node routing information request message to the HSS / HLR 33, so that the serving node information to which the WLAN terminal 10 belongs, the Capability information of the WLAN terminal 10, and the terminal location related information. Ask. Preferably, the terminal location related information includes location information of the WLAN AP to which the WLAN terminal 10 belongs or location information of the WLAN terminal 10.

Upon receiving the serving node routing information request message, the HSS / HLR 33 responds to the address of the AAA server 32 of the WLAN terminal 10, the capability information of the WLAN terminal 10, and the terminal location related information by the serving node routing information response. The message is transmitted to the location server 31.

If the serving node routing information response message includes the terminal location related information and the terminal location related information satisfies the QoP requested by the client 40, the location server 31 based on the terminal location related information. Provide location information of WLAN terminal 10.

On the other hand, when the serving node routing information response message does not include the terminal location related information or the terminal location related information does not satisfy the QoP, the location server 31 sends the destination terminal routing information inquiry message to the AAA server 32. Request routing information of the target terminal (WLAN terminal 10). The AAA server 32 receiving the destination terminal routing information inquiry message provides the location server 31 with the IP address, W-APN information, tunneling information, and terminal location related information of the currently configured WLAN terminal 10.

If the terminal location related information received from the AAA server 32 satisfies the QoP included in the LCS request of the client 40, the location server 31 transmits the WLAN terminal to the client 40 through the LCS response message. 10) transmits the location information.

However, when the terminal location related information is not received from the AAA server 32 or the terminal location related information does not satisfy the QoP, the location server 31 transmits an error message to the client 40.

The second method is when the external client 40 already knows the address of the AAA server 32 or the HLR / HSS 33, and the client 40 directly goes to the AAA server 32 or the HLR / HSS 33. The position value of the WLAN terminal 10 may be requested.

If the position value of the WLAN terminal 10 is requested from an external client 40, the AAA server 32 or the HLR / HSS 33 may store the position value of the WLAN terminal 10 previously stored in the client 40. Checks whether the requested QoP is satisfied, and transmits the corresponding location value to the external client 40 when the previously stored position value of the WLAN terminal 10 satisfies the QoP requested by the client 40.

As described above, the present invention has the effect of providing location information service for WLAN users through interworking between WLAN and mobile communication system. That is, in the present invention, the location information of the WLAN terminal is registered in the AAA server or the HLR / HSS, and an external client accesses the AAA server (or HLR / HSS) directly through the location server or directly to the AAA server (or HLR / HSS). Location information of the WLAN terminal registered in advance can be provided.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (22)

In the method of the location server to provide a location service through interworking between a wireless local area network (WLAN) and a mobile communication network, Calculating a location of the target terminal by performing a location measurement procedure with the target terminal when location tracking is requested from the target terminal; Registering the calculated position value with a serving node to which a target terminal belongs; And an external client communicating directly with the serving node to access a location value of a registered target terminal. The method of claim 1, wherein the target terminal Location information service providing method characterized in that the WLAN terminal. The method of claim 1, wherein the serving node is Location information service providing method characterized in that the AAA server or HLR / HSS. The method of claim 1, wherein the position value of the target terminal is Requested by using a location registration message, location information service providing method characterized in that delivered through a location registration response message. The method of claim 1, wherein the registration step Querying, by the location server, the address of the AAA server to the HSS / HLR via a serving node query message; Transmitting, by the HSS / HLR, an address of an AAA server to a location server through a serving node response message;  And registering, by the location server, a location value of the calculated WLAN terminal with an AAA server using a location registration message. The system of claim 5, wherein the location server is And providing the location value of the WLAN terminal to the serving node query message and transmitting the location value to the HSS / HLR. The system of claim 1, wherein the location server is Location information service providing method, characterized in that connected to the mobile communication network. The method of claim 1, further comprising: connecting the target terminal to a WLAN access network (WLAN AN); And providing, by the destination terminal, an authentication and registration procedure with the serving node through a WLAN AN. In the method of the location server to provide a location service through interworking between a wireless local area network (WLAN) and a mobile communication network, Calculating a location of the target terminal by performing a SUPL procedure when the location tracking is requested from the target terminal; Registering the calculated position value with a serving node to which a target terminal belongs; Checking whether the location server has previously stored the location value of the destination terminal when a location of the destination terminal is requested from the client; If the position value of the target terminal is stored in advance and the position value satisfies the Quality of Position (QoP) requested by the client, directly transmitting the position value to an external client without performing direct communication with the serving node. Location information service providing method comprising a. The method of claim 9, wherein the target terminal Location information service providing method characterized in that the WLAN terminal. 10. The method of claim 9, wherein the serving node is Location information service providing method characterized in that the AAA server or HLR / HSS. The method of claim 9, wherein the registration step Querying, by the location server, the address of the AAA server to the HSS / HLR via a serving node query message; Transmitting, by the HSS / HLR, an address of an AAA server to a location server through a serving node response message;  And registering, by the location server, a location value of the calculated WLAN terminal with an AAA server using a location registration message. The method of claim 12, wherein the serving node query message includes: Location information service providing method comprising a location value of the WLAN terminal. The system of claim 9, wherein the location server is Location information service providing method, characterized in that connected to the mobile communication network. The location information of claim 9, further comprising: receiving the location value of the destination terminal from a serving node and delivering the location value of the destination terminal to an external client when the location value of the destination terminal is not stored in advance. How to Provide Services. The method of claim 15, wherein said delivering step Obtaining routing information of a serving node to which the target terminal belongs from a home subscriber server / home location register (HSS / HLR); Checking whether or not terminal location related information is included in routing information of the serving node; If the terminal location related information is included, checking whether the information satisfies the QoP requested by the client; If the terminal location related information satisfies the QoP, providing the terminal location related information to the client; Obtaining routing information of a WLAN terminal from an AAA server if the terminal location related information is not included in the routing node of the serving node or does not satisfy the QoP; And providing the client with terminal location related information included in the obtained routing information. WLAN terminal; An AAA server for authenticating the WLAN terminal; A home subscriber server / home location register (HSS / HLR) for managing location-related information of the WLAN terminal and an AAA server address; When location tracking is requested from the WLAN terminal, the location value of the WLAN terminal calculated by the WLAN terminal and the location measurement procedure is registered in the AAA server or the HSS / HLR. And a location server which provides a stored location value of the WLAN terminal or a location value of the WLAN terminal registered in the AAA server or the HSS / HLR to an external client. 18. The system of claim 17, wherein the location server is A location information service providing system comprising requesting a location value of a WLAN terminal using a serving node query message and receiving a location value of a WLAN terminal using a serving node response message. 18. The method of claim 17, wherein the location server After obtaining the address of the AAA server by querying the address of the AAA server to the HSS / HLR through the serving node query message, and using the location registration message to register the calculated position of the WLAN terminal to the AAA server Location Information Service System. 18. The system of claim 17, wherein the location server is And a location value of the WLAN terminal by registering the location value of the WLAN terminal in the serving node query message and transmitting the location value of the WLAN terminal to the HSS / HLR. 18. The method of claim 17, wherein the location server If the mobile station does not store the calculated location value of the WLAN terminal, the location information service providing system comprising requesting the location value of the WLAN terminal to the AAA server or the HSS / HLR. 18. The method of claim 17, wherein the location server When the position of the WLAN terminal is requested from an external client, if it stores the calculated position value of the WLAN terminal and the position value satisfies the Quality of Position (QoP) requested by the external client, the AAA server or the HSS / HLR Location information service providing system, characterized in that for transmitting the location value directly to the external client without performing direct communication.

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