KR20110026370A - Method for providing location information and method for performing location service - Google Patents

Abstract

PURPOSE: A method for providing location information and a method for implementing a location service are provided to efficiently supply a location service even under an emergency situation. CONSTITUTION: A location server receives a specific message, and the specific message includes the information on a second terminal of which location is supposed to be measured. The location server transfers a session start message to a second terminal. The location server receives a location calculation start message. In order to request a location service for a first target set(110), a SUPL(Secure User Plane Location) agent(200) transfers a location service request message to an H-SLP(500).

Description

How to provide location information and how to perform location services {METHOD FOR PROVIDING LOCATION INFORMATION AND METHOD FOR PERFORMING LOCATION SERVICE}

The present invention relates to a location information service, and more particularly to a location service based on Secure User Plane Location (SUPL).

In general, a mobile communication system includes a related function unit for calculating a location of a terminal in a mobile communication network, and provides a location service that delivers the location of the terminal to a certain entity periodically or on request. Doing.

The location service is the basis for providing various additional services to the user, for example, traffic information service, location information service, weather information service, vehicle navigation service, emergency relief service, and the like.

The method for calculating the current position of the terminal includes a cell-ID scheme for transmitting the ID of the cell to which the terminal belongs, and measuring a time at which radio waves arrive from each terminal to adjacent base stations, and then using triangulation. There is a method for calculating a position, a method using a global positioning system (GPS), and the like.

As described above, in order to calculate the location and provide the location information, many signals and the location information must be transmitted between the mobile terminal and the location server.

The implementation form and operation procedure of the system for providing the location service are different depending on the structure of the network, for example, whether 3GPP, 3GPP2, UTRAN, E-UTRAN, and its characteristics.

Meanwhile, the location service may be generally provided through a user plane for transmitting user data and a control plane for transmitting control data. As an example of the above technology, a location service may be provided through a user plane. There is a Secure User Plane Location (SUPL) that provides a service.

SUPL is basically a communication protocol based on a user plane that provides location services through a user plane. For example, SUPL uses user plane data bearers to deliver location assistance information, such as Assisted-Global Positioning System (A-GPS), and to carry positioning technology related protocols between mobile terminals and networks. Bearer).

Such a SUPL-based location service may be provided through a SUPL network including a SUPL agent, a SET (SUPL Enabled Terminal), which is a terminal capable of supporting SUPL service, and a SPL (SUPL Location Platform).

1 is a block diagram showing a schematic configuration of a SUPL network.

Referring to FIG. 1, a device 20 including a SET 10, one or more base stations 31 and 32, a core network 40, an SLP 50, and a SUPL agent is shown.

First, the SUPL agent in the device 20 requests the SLP 50 for the location information of the SET 10, receives the measured location information of the SET from the SLP 50, and then uses the logical information. (Logical) A service access point. The SUPL agent may optionally be present in the SET.

The SET 10 refers to a terminal capable of communicating with a SUPL network. For example, the SET 10 may be a user equipment (UE) in a universal mobile telecommunication system (UMTS), a global system for mobile communication (GSM), or a mobile station (MS) in an inter standard-95 (IS-95). Or a mobile communication terminal such as a laptop computer or a personal digital assistant (PDA) having a built-in SET function. This SET interworkes with the SUPL network via a user plane bearer to support the procedures defined in SUPL. In addition, a SET which is a target of the current position measurement among the SETs may be referred to as a target SET.

The SLP 50 is a network entity responsible for managing SUPL services and determining a target SET. The SLP 50 may include a SULC Location Center (SLC) 55 and a SUPL Positioning Center (SPC) 57. In this case, the SPC 57 is an entity for calculating the actual position of the SET 10, and the SLC 55 serves as an SLP in addition to the position calculation function of the SPC 57, for example, roaming, resource management, and the like. The entity responsible for the role.

The SET 10 may be connected to the SPC 57 via the SLC 55, or may be directly connected to the SPC 57 to communicate with the SET 10. The connection mode for connecting to the SPC 57 via the proxy mode is called a proxy mode, and as in the latter case, the connection mode for directly connecting the SPC 57 to the SPC 57 is referred to as a non-proxy mode. Proxy Mode). When the SET and the SPC are connected through the proxy mode or the non-proxy mode, message exchange is performed between them, and the position calculation of the SET may be performed in the SPC.

Meanwhile, a network originally registered by the SET 10 is called a home network, and when the SET 10 moves and is located in an area other than the home network area, the network of the corresponding area is visited. Visited Network). In addition, the SLP in the home network is referred to as an H-SLP (Home-SLP), and the SLP in the visited network is referred to as a V-SLP (Visited-SLP).

On the other hand, in the location service based on the location of the mobile terminal, whether or not to promptly handle an emergency call in which the user urgently requests location information becomes an important factor in terms of the utility of the service. This is because, when the user is urgently requested for the current location due to distress or traffic accident, the user needs to quickly identify the location through an emergency call. However, when the emergency call is insufficiently processed, the utility of the service may be greatly reduced.

In the above-described location service of the prior art, a method of calculating the location of the SET includes a cell-ID method of delivering a cell ID of a base station to which the SET belongs, and a time when radio waves arrive from the SET to adjacent base stations. There are a method of calculating the position of the SET using a post-triangulation, a method using a Global Positioning System (GPS).

However, the positioning method based on the cell ID has an advantage of not requiring the change of the terminal or the addition of hardware. However, there is a disadvantage that a positioning error may occur up to several km depending on the placement and location of the base station. In addition, the positioning method using the GPS has a high accuracy of the positioning error of several m to several tens of meters, but there is a disadvantage that requires additional hardware for GPS signal reception and processing. Moreover, since there are few terminals equipped with the GPS, it is difficult to provide location services to a large number of users.

In particular, in the case of an emergency call, since a terminal having no GPS is large in position error, it may not be able to exert a great effect in an emergency situation.

Accordingly, an object of the present invention is to solve the above problems.

Specifically, the present invention, even if the terminal is not equipped with GPS hardware, or even if equipped with the current situation that the terminal can not perform the precise positioning through the GPS, when the SLP receives a location service request for the terminal It aims to solve this problem properly.

In order to achieve the above object, in the present application, even if the terminal does not have GPS hardware or even if the terminal does not currently perform precise positioning through the GPS, the SLP provides a location service for the terminal. When the request is received, the present invention proposes a method of acquiring and delivering a location of another terminal around the terminal.

For example, if the device does not support precise positioning (e.g., does not support precise positioning due to a problem with the hardware such as the GPS of the terminal), or if the precision positioning cannot be performed (use of other applications, etc.). In this case, it is difficult to use precision positioning, or cannot perform the precision positioning method required by the SLP.), And a method of acquiring and transmitting a position of another terminal located around the terminal is proposed.

Specifically, in order to achieve the above object, a location server provides a method for providing location information of a terminal. The location information providing method includes the location server receiving a specific message including at least the ID of the session and the location ID of the first terminal. Here, the specific message may include information on the second terminal to be measured the location. The method for providing location information may include: transmitting, by the location server, a session start message including at least the session ID to the second terminal; Receiving, by the location server, a location measurement initiation message including the session ID and the location ID of the second terminal; Comparing the location value obtained through the location ID of the first terminal with the location value obtained through the location ID of the second terminal; If it is determined by the comparison that the two location values are correlated with each other, the location server performing location measurement on the second terminal; The location server may further comprise the step of transmitting to the first terminal an end message including the result of the location measurement performed.

The information on the second terminal may include an ID of another terminal whose position is to be measured on behalf of the first terminal.

The location server may be the H-SLP of the first terminal. In this case, before receiving the specific message, the location server may further include transmitting a session initiation message including at least a session ID to the first terminal. The session initiation message transmitted to the first terminal may further include an alternative measurement permission parameter indicating whether position measurement by another terminal is also allowed, or another SET position permission parameter.

The method for providing location information may further include checking whether the session ID in the received specific message is the same as the session ID in the session initiation message transmitted to the first terminal. In this case, the step of transmitting the session start message to the second terminal may be performed when the two session IDs are the same.

The specific message is received from the first terminal, and the specific message may correspond to any one of a session initiation message, a service initiation message, and a SUPL INIT message.

The session initiation message may correspond to a service initiation message or a SUPL INIT message, and the location measurement initiation message may correspond to a SUPL POS INIT message.

The correlation between the two position values may be determined by whether the two position values are equal to each other or the two position values are within a preset allowable range.

The location server may be the H-SLP of the second terminal. In this case, the specific message may be received from the H-SLP of the first terminal. The termination message may be delivered to the first terminal through the H-SLP of the first terminal.

On the other hand, the present invention provides a method for performing a location service in a first terminal. The method of performing location services may include: receiving, by the first terminal, a session initiation message including a session ID and a location scheme from a location server; Determining whether the first terminal can perform the positioning method; If the first terminal cannot perform the positioning method, the method may include transmitting a terminal initiation message including at least a session ID and a location ID of the first terminal to the location server. Here, the terminal initiation message may further include information on a second terminal to be measured in place of the first terminal. The method of performing location service may further include receiving, by the first terminal, an end message including a result of location measurement performed on the second terminal from the server.

According to the present invention, even if the terminal is not equipped with hardware such as GPS for precise positioning or even if the terminal cannot perform the precise positioning through the GPS at present, the SLP may request a location service request for the terminal. When received, it is possible to obtain and transmit the position of the other terminal around the terminal.

This invention can be very useful in view of the recent trend of the user owning more than one terminal. That is, when the user has two or more terminals, the location service can be provided by the terminal that supports more accurate location measurement.

Therefore, it is possible to provide a location service more efficiently in an emergency situation.

1 is a block diagram showing a schematic configuration of a SUPL network.
2 is a flowchart showing a second embodiment of the present invention.
3 is a flowchart showing a second embodiment of the present invention.
4 is a flowchart illustrating a method according to embodiments of the present invention.
5 is a configuration block diagram of a terminal and a location server according to the present invention.

The present invention is applied to Secure User Plane Location (SUPL). However, the present invention is not limited thereto and may be applied to any position measuring method to which the technical spirit of the present invention can be applied.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes any item of a plurality of related listed items or a plurality of related listed yields.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present disclosure does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

In the accompanying drawings, a SET (SUPL Enabled Terminal) is shown by way of example, but the illustrated SET is a user terminal (UMTS) of a UMTS or a mobile station (MS) of a GSM or a laptop having a built-in SET function. Personal Digital Assistants (PDAs) and the like. In addition, the SET may be various mobile terminals connected through a wideband LAN (WLAN).

In addition, the terms used in the present invention will be briefly summarized.

-Geographical Area can be rectangular, circular or polygonal as the area on the map. The geographic area may be represented by a coordinate value.

Area-id is a list of IDs for cells that contain a predefined geographic area.

SUPL message: A message according to the Secure User Plane Location protocol. It is used to exchange signals between the H-SLP and the SET.

-RLP (Roaming Location Protocol): A protocol used between V-SLP and H-SLP.

MLP (Mobile Location Protocol): MLP is an application layer protocol for requesting and delivering a location of a terminal regardless of a network structure and location tracking method for performing location measurement. The MLP defines the role played by the location server, or SLP. The MLP includes a transport layer, an element layer, and a service layer. The element layer includes DTD elements and attributes of XML, and the service layer includes messages and rules for positioning.

2 is a flowchart showing a second embodiment of the present invention.

2, a SUPL Agent 200, a Home SUPL Location Platform (H-SLP) 500, a first target enabled terminal 110, and a second target SET 120. ) Is shown.

2, the home network of the first target SET 110 and the home network of the second target SET 120 are identical to each other, and the first target SET 110 and the second target SET ( The location measurement server 120 is the H-SLP 500.

In the first embodiment, when the H-SLP 500 receives a request for location service for the first target SET 110, the first target SET 110 is also allowed to measure location by another SET. It is characterized by passing a parameter or indicator indicating that. In addition, the first embodiment is characterized in that the first target SET 110 delivers a terminal initial message, for example, a SUPL SET INIT message including information of the second target SET to replace the position measurement to the H-SLP. do. In addition, the H-SLP 500 compares the position IDs of the first target SET 110 and the second target SET 120 to thereby detect the first target SET 110 and the second target SET 120. ) Are determined to be positioned within each other within the allowable range, the position of the second target SET 120 is measured in place of the first target SET 110.

Specifically, it is as follows.

A) To request location service for the first target SET 110, the SUPL agent 200 sends a location service request message, for example, a Mobile Location Protocol (MLP) Standard Location Immediate Request (SLIR) message, to the H-SLP. Send to 500. In this case, the H-SLP 500 refers to the SLP of the home network originally registered by the first target SET 110. The location service request message includes ms-id, client-id, qop. The ms-id represents the ID of the first target SET 110, the client-id represents the ID of the SUPL agent 200, the qop is an abbreviation of Quality of Position, Requirements of time delay, spatial accuracy).

When the H-SLP 500 receives the location service request message, the H-SLP 500 authenticates the SUPL agent 200, and the SUPL agent 200 accesses the requested service through the client-id in the location service request message. Check whether you have permission to Further, based on the ms-id in the location service message, the H-SLP 500 confirms whether to apply subscriber privacy for the SUPL agent 200.

In addition, the H-SLP 500 checks whether the previously calculated position satisfies the requirement of qop when the previously calculated position exists for the first target SET 110.

The H-SLP 500 then checks whether only notification and verification or verification are required. At this time, if there is a previous position that satisfies the requirement of qop, and notification and verification are not required, the H-SLP 500 proceeds to N process. (If a previously computed position which meets the requested QoP is available at the H-SLP and no notification and verification is required, the H-SLP SHALL directly proceed to step N.)

B) The H-SLP 500 checks whether the first target SET 110 is currently SUPL roaming, and checks whether the first target SET 110 supports SUPL.

C) Subsequently, the H-SLP 500 transmits a session initiation message or a service initiation message such as a SUPL INIT message to the first target SET 110. The session initiation message or service initiation message includes a session-id parameter, a posmethod parameter indicating an intended location measurement method, an SLP mode parameter indicating a proxy / non-proxy mode, and a qop parameter.

In addition, the session initiation message or service initiation message may include an alternative measurement permission parameter or an indicator indicating whether the position measurement by another SET is also allowed to the first target SET 110, for example, another SET position permission indicator. have. The alternative measurement grant parameter or the indicator indicates whether the first target SET 110 is allowed to send the position of the terminal supporting the precision positioning as another neighboring terminal, if the first target SET 110 cannot support the precision positioning scheme. In this case, the alternative measurement permission parameter or indicator may additionally indicate an allowable range (eg, position measurement by a SET of another owner is also allowed).

On the other hand, if it is necessary to notify or verify the first target SET 110 as a result of confirming whether privacy is applied in step A), the H-SLP 500 adds a Notification element to the session start message or service start message. Can be included. In addition, before transmitting the session initiation message or service initiation message, the H-SLP 500 calculates a hash of the session initiation message or service initiation message to verify validity, and calculates the calculated hash. Can be stored.

In addition, when it is determined that the previously calculated position is used in the process A, the session initiation message or the service initiation message may include a parameter indicating that no position measurement is performed, for example, a 'no position' posmethod parameter value. have. Upon receiving such a message, the first target SET 110 transmits an end message. The termination message may include the result of the verification process.

D) The first target SET 110 analyzes the received session initiation message or service initiation message, that is, the SUPL INIT message, and performs a procedure necessary for establishing a secure connection. In this case, if the requested SUPL agent 200 does not have the authority, the first target SET 110 may not perform any operation.

In addition, the first target SET 110 checks whether a notification element is included in the session initiation message or a service initiation message, and if the notification element is included, checks a rule according to the notification element, and Perform the action accordingly. In addition, the first target SET 110 determines whether to use the proxy / non-proxy mode according to the SLP mode parameter included in the session initiation message or service initiation message. When the proxy mode is used, the first target SET 110 establishes the secure connection with the H-SLP 500 by using the address of the H-SLP 500 provided in the home network.

E) The first target SET 110 checks the posmethod parameter and the qop parameter in the session initiation message or the service initiation message to determine the location method and accuracy required by the H-SLP 500. See if you can meet.

If the first target SET 110 does not support or cannot perform the required positioning method, or does not support or cannot perform the required accuracy, the session initiation message or the service. Check the alternate measurement grant parameter in the initiation message.

If it is confirmed that position measurement by another SET is also allowed by the substitution measurement permission parameter, the first target SET 110 transmits a terminal initial message, eg, a SUPL SET INIT message, to the H-SLP 500. . The terminal initial message may include a session-id parameter, a location ID indicating an ID of a cell in which the terminal is located, and a parameter indicating information on another target SET to measure a location on behalf of the first target SET 110. Contains the Target SET id parameter. The other target SET may be located around the first target SET 110. In FIG. 2, it is assumed that the Target SET id indicates the ID of the illustrated second target SET 120. The other target SET indicated by the Target SET id parameter may be input by the user in advance, or may be input by the user after receiving the SUPL INIT message.

F) When the H-SLP 500 receives the terminal initial message, the H-SLP 500 checks the Target SET id parameter in the terminal initial message. When the second target SET 120 is identified through the Target SET id parameter, the H-SLP 500 applies subscriber privacy to the second target SET 120.

On the other hand, the H-SLP 500 checks whether the previously calculated position satisfies the requirement of qop if the previously calculated position exists for the second target SET 120.

The H-SLP 500 then checks whether only notification and verification or verification are required. At this time, if there is a previous location that meets the requirements of qop, notification and verification are not required.

The H-SLP 500 checks whether the second target SET 120 is currently SUPL roaming, and checks whether the second target SET 120 supports SUPL.

G) If the second target SET 120 supports SUPL, the H-SLP 500 sends a session initiation message or a service initiation message such as a SUPL INIT message to the second target SET 120 to start a location session. To send). The session initiation message or service initiation message includes a session-id parameter, a posmethod parameter indicating an intended location measurement method, an SLP mode parameter indicating a proxy / non-proxy mode, and a qop parameter.

On the other hand, if it is necessary to notify or verify the second target SET 120 as a result of confirming whether privacy is applied in step F), the H-SLP 500 adds a Notification element to the session initiation message or service initiation message. Can be included. In addition, before transmitting the session initiation message or service initiation message, the H-SLP 500 calculates a hash of the session initiation message or service initiation message to verify validity, and calculates the calculated hash. Can be stored.

In addition, when it is determined that the previously calculated position is used in the process F, the session initiation message or the service initiation message may include a parameter indicating that no position measurement is performed, for example, a 'no position' posmethod parameter value. have.

H) The second target SET 110 analyzes the received session initiation message or service initiation message, that is, the SUPL INIT message, and performs a procedure necessary for establishing a secure connection. In this case, if the requested SUPL agent 200 does not have the authority, the second target SET 120 may not perform any operation.

In addition, the second target SET 120 checks whether a notification element is included in the session initiation message or a service initiation message, and if the notification element is included, checks a rule according to the notification element, and Perform the action accordingly. In addition, the second target SET 120 determines whether to use the proxy / non-proxy mode according to the SLP mode parameter included in the session initiation message or service initiation message. When the proxy mode is used, the second target SET 120 establishes the secure connection with the H-SLP 500 using the address of the H-SLP 500 provided in the home network.

I) The second target SET 120 transmits a location session initiation message, or a location measurement initiation message, such as a SUPL POS INIT message, to initiate a location session with the H-SLP 500.

The second target SET 120 may initiate the location session even when the second target SET 120 does not support the location measurement method specified in the received session start message, that is, the posmethod parameter included in the SUPL INIT message. Message or the location measurement initiation message, eg SUPL POS INIT. The location session initiation message or the location measurement initiation message, for example, SUPL POS INIT, is a session-id parameter, a location ID indicating an ID of a cell in which the location is located, and a SET indicating capability information of the second target SET 120. Contains capabilities parameters. The SET capabilities parameter may include a supported location measurement method (eg, SET-Assisted A-GPS or SET-Based A-GPS) and a location measurement protocol related to the supported location measurement method (eg, RRLP, RRC, TIA-801). Contains information about The location session initiation message or the location measurement initiation message, eg SUPL POS INIT, includes a hash of the received session initiation message, i.e., SUPL INIT message.

The second target SET 120 may provide an NMR specific to the radio technology. The second target SET 120 may set a requested assistance data element in the location session initiation message.

J) in step G, the H-SLP 500 responds to the session initiation message or the service initiation message for the session initiation message or the location initiation message, for example, a session initiation message or a service initiation message that the user has transmitted. Compare with the hash value calculated and stored.

Subsequently, the H-SLP 500 determines whether the first target SET 110 and the second target SET 120 are located close to each other.

Specifically, the H-SLP 500 receives the value of the Location ID in the location session start message received from the first target SET 110 in step E and the second target SET 120 in step I. The value of the Location ID in the Location Session Initiation message or the Location Measurement Initiation message, eg SUPL POS INIT, is compared. Alternatively, the H-SLP 500 may recognize the location value through the Location ID in the location terminal initiation message received from the first target SET 110 in step E and the second target SET 120 in step I. Compares the location value recognizable via the location session initiation message or the location measurement initiation message, eg, Location ID in SUPL POS INIT.

In this case, multiple Location IDs are included in the terminal initiation message received from the first target SET 110 in step E, and a location session initiation message or location received from the second target SET 120 in step I. When multiple Location IDs are included in the measurement start message, the plurality of Location IDs are compared.

If the values of the two Location IDs are not the same or out of an allowable range (even if the first target SET and the second target SET are located close to each other, the values of the multiple Location IDs may be slightly different. In this case, the multiple The location result value based on the location IDs may be compared to SET1 and SET2 to determine whether the distance between the two is close to the dust), the H-SLP 500 is the second target SET 120 is It is determined that it is not located in the vicinity of the first target SET 110, and transmits an end message, for example, a SUPL END message to the second target SET (120). In addition, the H-SLP 500 may transmit a Cell ID of the first target SET 110 to the first target SET 110 and the SUPL agent as a result of the location measurement.

However, as a result of the comparison, if the values of the two Location IDs are the same or within an allowable range, or if the location values respectively identified from the two Location IDs are the same or within the allowable range, the H-SLP 500 determines the first value. It is determined that the first target SET 110 and the second target SET 120 are in close proximity, and the process proceeds to the following K process.

K) Based on the location session initiation message or the location measurement initiation message, eg SUPL POS INIT, the H-SLP 500 determines a location scheme. The H-SLP 500 exchanges a plurality of precise location measurement messages with the second target SET 120.

The precise position measurement is based on the SET-Assisted manner in which the H-SLP 500 calculates the position based on the position measurement messages and the support from the H-SLP by the second target SET 120. (SET-Based) exists to calculate the position.

L) When the position calculation is completed, the second target SET 120 sends an end message, eg SUPL END message, to the H-SLP 500 indicating that no additional position measurement procedure is started and indicating that the position session is terminated. send.

The second target SET 120 releases the secure connection established with the H-SLP 500 and releases resources.

M) the H-SLP 500 transmits to the first target SET 110 an end message indicating that the location session has ended, eg, a SUPL END message. In this case, the termination message may include a position value measured with respect to the second target SET 120.

Then, the first target SET 110 releases the secure connection established with the H-SLP 500 and releases resources.

N) The H-SLP 500 transmits an MLP SLIA (Standard Location Immediate Answer) including the measured location value to the SUPL agent 200.

As described above, in the first embodiment, when the home network of the first target SET 110 and the home network of the second target SET 120 are the same, the first target SET 110 does not support precise positioning. If not or cannot be performed, precise positioning may be performed using the second target SE 120 positioned around the first target SET 110.

3 is a flowchart showing a second embodiment of the present invention.

Referring to FIG. 3, an H-SLP for a SUPL agent 200, a first target SET (SUPL enabled terminal) 110, a second target SET 120, and the first target SET 110. 510 and an H-SLP 520 for the second target SET 120 are shown.

That is, the home network of the first target SET 110 and the home network of the second target SET 120 are different from each other, and the location measurement server of the first target SET 110 is the first H-SLP 510. The location measurement server of the second target SET 120 is a second H-SLP 520.

Specifically, it is as follows.

A) To request location service for the first target SET 110, the SUPL agent 200 sends a location service request message, for example, a Mobile Location Protocol (MLP) Standard Location Immediate Request (SLIR) message, to the first H. Send to the SLP 510. In this case, the first H-SLP 510 refers to the SLP of the home network originally registered by the first target SET 110. The location service request message includes ms-id, client-id, qop.

Since details are similar to process A of FIG. 2, the descriptions of FIG. 2 will apply mutatis mutandis.

B) The first H-SLP 510 checks whether the first target SET 110 is currently SUPL roaming, and checks whether the first target SET 110 supports SUPL.

C) Subsequently, the first H-SLP 510 transmits a session initiation message or a service initiation message such as a SUPL INIT message to the first target SET 110. The session initiation message or service initiation message includes a session-id parameter, a posmethod parameter indicating an intended location measurement method, an SLP mode parameter indicating a proxy / non-proxy mode, and a qop parameter.

In addition, the session initiation message or service initiation message may include an alternative measurement permission parameter or an indicator indicating that position measurement by another SET is also allowed to the first target SET 110, for example, another SET position permission indicator. .

Other details are the same as the description of process C of FIG. 2, and thus the description of process C of FIG. 2 will apply mutatis mutandis.

D) The first target SET 110 analyzes the received session initiation message or service initiation message, that is, the SUPL INIT message, and performs a procedure necessary for establishing a secure connection. Since other details are the same as the description of the process D of FIG. 2, the description of the process D of FIG. 2 will apply mutatis mutandis.

E) The first target SET 110 checks the posmethod parameter and the qop parameter in the session initiation message or the service initiation message, so that the location target method and request are requested by the first H-SLP 500. Make sure you can meet the accuracy required.

If the first target SET 110 does not support or cannot perform the required positioning method, or does not support or cannot perform the required accuracy, the session initiation message or the service. Check the alternate measurement grant parameter in the initiation message.

If it is determined that the position measurement by another SET is also allowed by the substitution measurement permission parameter, the first target SET 110 sends a terminal initial message, eg, a SUPL SET INIT message, to the first H-SLP 510. send. The terminal initial message may include a session-id parameter, a location ID indicating an ID of a cell in which the terminal is located, and a parameter indicating information on another target SET to measure a location on behalf of the first target SET 110. Contains the Target SET id parameter. In FIG. 3, it is assumed that the Target SET id indicates the ID of the illustrated second target SET 120.

F) When the first H-SLP 510 receives the terminal initial message, for example, a SUPL SET INIT message, the first H-SLP 510 checks the Target SET id parameter in the terminal initial message. When the second target SET 120 is identified through the Target SET id parameter, the location server of the second target SET 120 is identified, that is, the H-SLP.

When the location server of the second target SET 120 is identified as the second H-SLP 520, the first H-SLP 510 sends the second target SET 120 to the second SLP 520. Send a request message to request the location of. The request message may be MLP based or RLP based. The request message may include one or more of an ID of the first target SET 110, an ID of the second target SET 120, a QoP, and a Locaiton id received from the first target SET 110. Alternatively, the request message may include the received terminal initial message.

G) When the second H-SLP 520 receives the request message, the second H-SLP 520 applies subscriber privacy to the second target SET 120.

The second H-SLP 520 checks whether the previously calculated position satisfies the requirement of qop if the previously calculated position exists for the second target SET 120.

The second H-SLP 520 then checks whether only notification and verification or verification are required. At this time, if there is a previous location that meets the requirements of qop, notification and verification are not required.

The second H-SLP 520 checks whether the second target SET 120 is currently SUPL roaming, and checks whether the second target SET 120 supports SUPL.

H) If the second target SET 120 supports SUPL, the second H-SLP 520 sends a session initiation message or a service initiation message such as a SUPL INIT message to the second target SET to start a location session. Send to 120. The session initiation message or service initiation message includes a session-id parameter, a posmethod parameter indicating an intended location measurement method, an SLP mode parameter indicating a proxy / non-proxy mode, and a qop parameter. Since other details are the same as the process G of FIG. 2, the contents of FIG. 2 will apply mutatis mutandis.

Processes I) through M) are similar to processes H through L in FIG. 2, and thus, the contents of FIG. 2 will be applied mutatis mutandis without detailed description.

N) the second SLP 520 delivers a location response message that includes the measured location value of the second target SET 120. The location response message may be an MLP based message or an RLP based message. The location response message may further include information on a positioning method used to measure the location of the second target SET 120 in addition to the location value.

O) The first H-SLP 510 transmits to the first target SET 110 an end message, eg, a SUPL END message, indicating that the location session has ended. In this case, the termination message may include a position value measured with respect to the second target SET 120.

Then, the first target SET 110 releases the secure connection established with the first H-SLP 510 and releases resources.

P) The first H-SLP 500 transmits an MLP SLIA (Standard Location Immediate Answer) including the measured location value to the SUPL agent 200.

As described above, in the second embodiment, when the home network of the first target SET 110 and the home network of the second target SET 120 are different from each other, the first target SET 110 supports precise positioning. If not or cannot be performed, precise positioning may be performed using the second target SET 120 located around the first target SET 110.

The first and second embodiments described above have described the proxy mode and the non-roaming situation. However, those skilled in the art will appreciate that, based on the foregoing, the present invention can be applied to non-proxy modes and roaming situations. Thus, the scope of the present invention should be construed as applicable to non-proxy mode and roaming situations.

4 is a flowchart illustrating a method according to embodiments of the present invention.

As can be seen with reference to FIG. 4, the H-SLP 500 receives a specific message including at least a session-id and a location ID (lid: location ID) of the first terminal (ie, the first target SET). (S501). The specific message may correspond to any one of a session start message, a service start message, and a SUPL INIT message received from the first terminal. In this case, the H-SLP 500 may transmit a session start message including at least a session id, for example, a SUPL INIT message, to the first terminal (ie, the first target SET) before the specific message is received. The session initiation message transmitted to the first terminal (ie, the first target SET) may further include an alternative measurement permission parameter indicating whether position measurement by another terminal is also allowed, or another SET position permission parameter. The H-SLP 500 may check whether the session id in the received specific message is the same as the session id in the session initiation message sent to the first terminal (ie, the first target SET).

Then, after receiving the specific message, the H-SLP 500 transmits a session start message including at least a session id, for example, a SUPL INIT message, to the second terminal (ie, the second target SET) (S502). ).

Subsequently, when the H-SLP 500 receives the location measurement start message including the session id and the location ID (lid) of the second terminal (ie, the second target SET), for example, a SUPL POS INIT message (S504). In step S504, it is determined whether the position value obtained through the position ID (lid) of the first terminal and the position value obtained through the position ID (lid) of the second terminal are correlated with each other.

When the two position values are correlated with each other, the H-SLP 500 performs position measurement on the second terminal (S505).

Subsequently, the H-SLP 500 transmits an end message including a result of the performed position measurement, for example, a SUPL END message, to the first terminal (S506).

The method according to the invention described thus far can be implemented in software, hardware, or a combination thereof. For example, the method according to the present invention may be stored in a storage medium (eg, internal memory, flash memory, hard disk, etc.), and may be a microprocessor, controller, microcontroller, application specific integrated circuit (ASIC). It may be implemented as codes or instructions in a software program that can be executed by a processor such as. This will be described with reference to FIG. 11.

5 is a configuration block diagram of a terminal and a location server according to the present invention.

As shown in FIG. 5, the terminal, that is, the SET 100, includes a storage means 101, a transceiver 103, and a controller 102. The location server, that is, the SLP, also includes a storage means 501, a transceiver 503, and a controller 502.

The storage means 101, 501 store a software program in which the method shown in FIGS. 2 to 4 is implemented. The storage means then stores the information in each received message.

Each of the controllers 102 and 502 controls the storage means and the transceiver. Specifically, the controllers each execute the methods stored in the storage means. Each of the controllers transmits the aforementioned signals through the transceivers.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, May be modified, modified, or improved.

100: terminal
110: first target SET
120: second target SET
200: SUPL agent
500: server
510: first H-SLP
520: second H-SLP

Claims (16)

A method for providing location information of a terminal in a location server,
Receiving, by the location server, a specific message including at least an ID of the session and a location ID of the first terminal; Here, the specific message includes information on the second terminal to be measured position
Sending, by the location server, a session initiation message including at least the session ID to the second terminal;
Receiving, by the location server, a location measurement initiation message including the session ID and the location ID of the second terminal;
Comparing the location value obtained through the location ID of the first terminal with the location value obtained through the location ID of the second terminal;
When the comparison determines that the two location values are correlated with each other, the location server performing a location measurement on the second terminal;
And transmitting, by the location server, an end message including the result of the performed location measurement to the first terminal. The method of claim 1, wherein the information about the second terminal is
And an ID of another terminal whose position is to be measured on behalf of the first terminal. The system of claim 1, wherein the location server is
Location information providing method, characterized in that the H-SLP of the first terminal. The method of claim 1, wherein before the specific message is received.
And transmitting, by the location server, a session initiation message including at least a session ID to the first terminal. 5. The session initiation message transmitted to the first terminal.
And an alternative measurement permission parameter indicating whether position measurement by another terminal is also allowed, or another SET position permission parameter. The method of claim 4, wherein
Checking whether the session ID in the received specific message is the same as the session ID in the session initiation message sent to the first terminal;
And transmitting the session start message to the second terminal when the two session IDs are the same. The method of claim 1,
The specific message is received from the first terminal,
The specific message corresponds to any one of a session start message, a service start message, and a SUPL INIT message. The method of claim 1,
The session initiation message corresponds to a service initiation message or a SUPL INIT message,
The location measurement start message corresponds to a SUPL POS INIT message. The method of claim 1, wherein the correlation between the two position values is
And when the two position values are identical to each other or the two position values are different, the difference between the two position values is within a preset allowable range. The method of claim 10,
When the two position values are the same as each other or the two position values are different, the difference between the two position values is within a preset allowable range,
And the first terminal and the second terminal are determined to be located in close proximity in the same area. The system of claim 1, wherein the location server is
Location information providing method, characterized in that the H-SLP of the second terminal. The method of claim 1,
The specific message is a location information providing method, characterized in that received from the H-SLP of the first terminal. The method of claim 1, wherein the end message is
Method for providing location information, characterized in that delivered to the first terminal through the H-SLP of the first terminal. A method for performing location service in a first terminal,
Receiving, by the first terminal, a session initiation message including a session ID and a location scheme from a location server;
Determining whether the first terminal can perform the positioning method;
If the first terminal cannot perform the positioning method, transmitting a terminal initiation message including at least a session ID and a location ID of the first terminal to the location server; Here, the terminal initiation message further includes information on a second terminal whose position is to be measured on behalf of the first terminal.
And receiving, by the first terminal, an end message including a result of the position measurement performed for the second terminal from the server. The method of claim 14,
The session initiation message corresponds to a service initiation message or a SUPL INIT message,
And the terminal initiation message corresponds to a SUPL SET INIT message. 15. The method of claim 14, wherein said session initiation message is
And an alternative measurement permission parameter indicating whether or not location measurement by another terminal is also allowed, or another SET position permission parameter.

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