KR101063862B1

KR101063862B1 - Method for calculating location information

Info

Publication number: KR101063862B1
Application number: KR20060081340A
Authority: KR
Inventors: 심동희; 최재혁
Original assignee: 엘지전자 주식회사
Priority date: 2006-01-26
Filing date: 2006-08-25
Publication date: 2011-09-14
Also published as: CN101336555A; KR20070077029A; WO2007086636A1; CN101336555B

Abstract

The present invention relates to a method and system for calculating correlation location information based on Secure User Plane Location (SUPL). The present invention relates to a location value of a user terminal and a location value of a target terminal through a SUPL-based location information system. After the acquisition, the correlation position information (for example, relative distance and direction between the user terminal and the target terminal, etc.) between the two terminals is calculated using the obtained position values, and the user terminal calculates the calculated correlation position information. It is provided.

Geolocation, SUPL

Description

Location information calculation method {METHOD FOR CALCULATING LOCATION INFORMATION}

1 is a signal flowchart illustrating a method of calculating, by a location server SLP1, correlation location information between a user terminal SET1 and a target terminal SET2 according to a first embodiment of the present invention.

FIG. 2 is a signal flowchart illustrating a method of calculating, by the location server SLP2, correlation location information between a user terminal SET1 and a target terminal SET2 according to a second embodiment of the present invention.

3 is a signal flow diagram illustrating a method of calculating, by a home location server (H-SLP), respective correlation location information between a user terminal (SET) and n target terminals according to a third embodiment of the present invention.

FIG. 4 is a signal flow diagram illustrating a method for calculating each of the location servers SLP1 to SLP n for each correlation position information between a user terminal SET and n target terminals according to a fourth embodiment of the present invention.

The present invention relates to a location information system based on Secure User Plane Location (SUPL), and more particularly, to a method of calculating correlation location information such as a distance and a direction between a specific terminal and another terminal.

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 network structure related to the location service varies depending on an internal network structure such as 3GPP or 3GPP2, and the method of calculating the location of the current terminal includes a cell-ID scheme for transmitting an ID of a cell to which the terminal belongs, and a neighboring terminal to the terminal. After measuring the time that the radio wave reaches each base station, there is a method of calculating the position of the terminal using triangulation, a method using a GPS (Global Positioning System).

In order to provide the location service to the user, a lot of signals and location information must be transmitted between the mobile terminal and the location server. Therefore, recently, standardized location technologies (Positioning Technologies) for providing the location service, that is, location service based on the location of the mobile terminal, are rapidly spreading. The technologies may be generally provided through a user plane and a control plane. As an example of the technology, a secure user plane location (SUPL) for providing a location service through the user plane is called SUPL. There is).

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

In general, a SUPL network related to location services in a location information system includes a SUPL agent, a SLP (SUPL Location Platform), a SET (SUPL Enabled Terminal), and the like. The SUPL agent is a logical service access point using actual measured location information, the SLP is a SUPL service access point of a network part that accesses network resources to obtain location information, and the SET is a SUPL interface. It is a device that can communicate with the SUPL network to be used and supports the definition procedures in SUPL in conjunction with the network through a user plane bearer. In this case, the SET may be one of a user terminal (UMTS) of a UMTS, a mobile station (MS) of a GSM, a laptop (Laptop Computer) or a personal digital assistant (PDA) incorporating a SET function. In addition, the SET may be various mobile terminals connected through a wideband LAN (WLAN).

In the location information service, a network originally registered by a user is called a home network, and when a user moves and moves to an area other than the home network area, the network of the corresponding area is called a visited network. . Therefore, the SLP in the home network is referred to as H-SLP (Home-SLP), and the SLP in the visited network is referred to as V-SLP (Visited-SLP).

When the SUPL procedure is initiated in the network of the location information system as described above, an SLP to which an external client first connects is called a requesting-SLP (R-SLP), which may be the same as the H-SLP as a logical entity. And may not be the same. The SET aiming at the current position tracking is called a target SET.

The SLP is a network element. The SLP is composed of an SPC (SUPL Positioning Center), which is an entity for calculating an actual position, and an SLC (SUPL Location Center), which plays a role other than calculating position information. At this time, the SLC performs roaming and resource management.

The location information system includes a proxy mode in which the SET communicates with the SPC through the SLC to calculate location information, and a non-proxy mode in which the SET opens a direct connection with the SPC to calculate location information. Mode).

In the conventional SUPL-based location information system, the user can know only his location or the location of the desired counterpart through the SUPL procedure. In addition, if the user wants to know both the location of himself and the other party, the user must proceed with two SUPL procedures. Therefore, there is a technical limitation that relative location related information between the user's own location and the other party's location, for example, a distance or a direction between the two, is not provided.

An object of the present invention is to calculate the correlation position information between the user terminal and the target terminal, that is, the correlation position information providing the distance and direction between the two terminals to the user terminal.

In order to achieve the above object, the method for calculating correlation position information according to the present invention comprises the steps of: obtaining a position value of a user terminal; Obtaining a position value of at least one or more target terminals; Using the position value of the user terminal and the position value of the at least one target terminal, characterized in that for calculating the respective correlation position information between the user terminal and the at least one target terminal.

Preferably, the method comprising: requesting to calculate respective correlation location information between the user terminal and the at least one target terminal; And designating a location server for calculating respective correlation location information between the user terminal and the at least one target terminal.

In addition, in order to achieve the above object, the method for calculating the correlation location information according to the present invention comprises a method for providing a location service of a specific terminal having at least one terminal and at least one location server,

In order to calculate the correlation location information between the first terminal and the second terminal,

Transmitting, by the first terminal, first information to a first location server; The first location server is characterized in that for transmitting the second information to calculate the correlation location information to a second location server.

Preferably, the step of obtaining the position value of the first terminal through the positioning session between the first terminal and the first location server; Obtaining a position value of the second terminal through a positioning session between the second terminal and the second location server; Calculating, by a specific location server, the correlation location information by using the acquired location value of the first terminal and the location value of the second terminal; And transmitting the calculated correlation location information to the first terminal by the specific location server.

A method of calculating respective correlation location information between a first terminal and a plurality of target terminals,

Transmitting, by the first terminal, first information to a first location server;

The second location server delivering second information to each of a plurality of second location servers; Calculating each of the plurality of second location servers by using the second information to calculate correlated location information; Transmitting, by each of the second location servers, the calculated correlation location information to the first location server; And transmitting, by the first location server, the calculated correlation location information to the first terminal.

A method of calculating correlation position information between a first terminal and a plurality of target terminals, the method comprising:

Transmitting, by the first terminal, first information to a first location server; Delivering, by the first location server, second information to each of the plurality of second location servers; Calculating, by each of the plurality of second location servers, a location value of each target terminal in its corresponding service area and transmitting the calculated location value to the first location server; Calculating, by the first location server, the respective correlation location information using each location value of the target terminals; And transmitting, by the first location server, the calculated correlation location information to the first terminal.

Hereinafter, the configuration and operation of an embodiment of the present invention will be described with reference to the accompanying drawings.

The basic concept of the present invention is to obtain a position value of a user terminal (eg, SET1) and a target terminal (eg, SET2) through a SUPL-based location information system, and then use the obtained position value. Correlation position information (eg, relative distance and direction between the user terminal and the target terminal, etc.) between both terminals is calculated, and the user terminal (ie, SET1) is provided with the calculated correlation position information. Here, the relative distance among the correlation location information refers to the distance to the point where the target terminal is currently located based on the point where the user terminal is currently located. In addition, for example, the relative direction in the correlation position information means an azimuth coordinate (for example, north-northwest direction) or an angle (for example, 270 °) or a clockwise direction (for example, 9 o'clock direction) based on the user terminal. It may be a direction expressed by).

Embodiments of the present invention may be classified according to a location server (SLP), that is, which location server of SLP 1 and SLP 2 calculates correlation location information. In addition, embodiments of the present invention may be classified according to whether the number of target terminals corresponding to the target to obtain the correlation location information based on the user terminal (that is, SET1) is one or more.

1 is a signal flow diagram illustrating a method for SLP1 calculating correlation position information (ie, relative distance and direction between SET1 and SET2) between SET1 and SET2 according to a first embodiment of the present invention. That is, the embodiment shown in FIG. 1 is an embodiment in which SLP1 calculates correlation position information between SET1 and SET2 by using distance information (that is, position value) of SET1 and SET2.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIG. 1.

The first embodiment of the present invention can be largely divided into three procedures. That is, the three procedures include the steps S1 to S6 of acquiring (or calculating) the position value of the first SET1, the steps S8 to S13 of acquiring (or calculating) the position value of the second SET2, and the third acquiring. This is a procedure for calculating correlation position information (ie, distance and direction between SET1 and SET2) using the position value of one SET1 and the position value of SET2.

Hereinafter, procedures S1 to S6 for obtaining the position value of SET1 between SLP1 and SET1 will be described.

The SUPL agent in SET1 receives a location-related request from an application running in SET1 (S1). If SET1 is not connected to a packet data network service, SET1 connects itself to a packet data network or a circuit switch network.

The SUPL agent in SET1 establishes a secure IP connection with SLP1 using the provisioned base address from the home network, and SET1 initiates a location session with SLP1 (where location is a location measurement). Send (S2). At this time, the SUPL START message includes predetermined information, that is, at least a session-id including a msid, a request type, a SET capabilities, and a location identifier (lid). Here, msid is a parameter (or element) including ID (identification) information of SET2, the request type is the location request information relative to the location request type of SET1 (for example, relative distance between SET1 and SET2 and Is an indicator that the SET capabilities include information about the positioning methods supported by SET1 (e.g., SET-Assisted A-GPS, SET-Based A-GPS) and the associated positioning protocols (e.g., RRLP, or RRC, or TIA-). 801 is a parameter that contains information about the. Here, the meaning of other information, including examples of the positioning schemes (ie, SET-Assisted A-GPS, SET-Based A-GPS) and examples of positioning protocols (ie, RRLP, or RRC, or TIA-801), means As already disclosed in the related art of the present invention, a detailed description thereof will be omitted. On the other hand, if the position calculated by SLP1 in the previous procedure satisfies the QoP (Quality of Positioning) requested by SET1, SLP1 may proceed to the steps (ie, S7) to be described below.

SLP1 confirms that SET1 is not SUPL roaming (S3). Based on the received msid (ie, the parameter including the ID of SET2), SLP1 determines the location server SLP2 of the service area in which SET2 exists.

SLP1 sends a SUPL RESPONSE message to SET1 in response to the SUPL START message (S4). In this case, SPL1 determines one of the positioning methods supported by SET1 (ie, the positioning methods included in the SET capabilities of the SUPL START message), and the determined positioning method is a predetermined parameter (or element) of the SUPL RESPONSE message (for example, For example, it is included in posmethod) and passed to SET1. If SET1 requests a specific location method through the SET capabilities of the SUPL START message, then SLP1 uses the supported location protocols (eg, RRLP, or RRC, or TIA-801) included in the SUPL START message. In addition, the SUPL RESPONSE message contains the session-id but does not contain the address of SLP1 because SET1 does not need to establish a new connection. On the other hand, even if the position value of SET1 calculated by the information included in the SUPL START message received by SLP1 is not precise, if SLP1 satisfies the requested QoP, SLP1 can proceed directly to the following steps (ie, S7). have.

SET1 receives a SUPL RESPONSE message from SLP1 and then sends a SUPL POS INIT message (S5). At this time, the SUPL POS INIT message includes at least predetermined information, that is, session-id, SET capabilities, and location identifier (lid). Among the above information, the SET capabilities include positioning methods (eg, SET-Assisted A-GPS and SET-Based A-GPS) that can be supported by SET1 and positioning protocols related to each positioning method (eg, RRLP, RRC, TIA-). 801). On the other hand, SET1 may provide NMR detailed information (e.g., TA, or RXLEV for GSM) for the radio technology currently in use (e.g., GSM). In addition, SET1 may include the first SUPL POS element in the SUPL POS INIT message, and may also include a Requested Assistance data element.

Through the steps S4 and S5, positioning procedure messages are successfully exchanged between SET1 and SLP1 (SUPL POS (session-id, RRLP / RRC / TIA-801) (S6). Through step S6 The position value of SET1 is calculated (or obtained), where the position value (that is, the position value of SET1) may be calculated by SLP1 (this method is called SET-Assisted). (Ie, the position value of SET1) may be calculated by SET1 through assistance data supported by SLP1 (this method is called SET-Based). This holding (for example, the position value of SET1 is stored in a predetermined memory) is used in a subsequent procedure (i.e., step S15 below), i.e., calculating the correlation position information between SET1 and SET2.

Meanwhile, the steps S4, S5, and S6 may be performed after the following step S7 (shown as S4 ', S5', and S6 'in FIG. 1).

SLP1 sends a location request message (RLP SSRLIR SUPL START) to SLP2 via the RLP protocol (S7). In this case, the message (ie, RLP SSRLIR SUPL START) includes predetermined information, that is, session-id, msid, client-id, QoP, request type, and calculate server. Here, the calculate server parameter of the information includes information on which server (for example, SLP1 or SLP1 is designated as SLP1 or SLP2) calculates correlation position information (for example, distance and direction between SET1 and SET2). For example, the IP address of SLP1). That is, the information (ie, calculate server) designates a server for calculating correlation position information. In addition, the request type of the information, as described above, is an indicator indicating that the location request type of SET1 is relative position information (for example, the correlation distance and direction between SET1 and SET2). In addition, the client-id of the information is an information element (that is, a parameter) used for authentication of a specific service requested by SET1. For example, if SET1 is authorized for the service request as in step S7, SLP2 authenticates SET1 using the client-id of the received location request message (RLP SSRLIR SUPL START). In addition, msid of the information includes the ID information of SET2, SLP2 applies the privacy (privacy) of SET2 (that is, the target terminal) through the msid.

On the other hand, after the step S7, the position value of SET2 previously calculated by SLP2 satisfies the QoP requested by SET1, or SLP2 informs SET2 of a predetermined notification or confirmation for obtaining the position value of SET2. If no acknowledgment procedure is required, the following steps S8 to S13 for calculating the position value of SET2 are not performed, and SLP2 proceeds directly to the following step S14.

Hereinafter, procedures S8 to S13 for obtaining the position value of SET2 between SLP2 and SET2 will be described.

SLP2 confirms that SET2 is not currently SUPL roaming (S8). SLP2 also confirms that SET2 supports SUPL. After such confirmation, SLP2 sends a SUPL INIT message to SET2 to start a location session with SET2 (S9). Here, the SUPL INIT message is predetermined information (the type of the information is a parameter or an element), and includes a session-id and a proxy / non-proxy mode indicator (for example, FIG. 1). SLP mode in S9), and the positioning method to be used (for example, posmethod in S9 of FIG. 1). Meanwhile, the SUPL INIT message may include a desired QoP.

When SET2 receives the SUPL INIT message from SLP2 and SET2 does not have a data connection setup, SET2 proceeds with data connection setup (S10). That is, SET2 connects itself to a circuit switch network or a packet data network.

SET2 initiates a positioning session by sending a SUPL POS INIT message to SLP2 (S11). In this case, the SUPL POS INIT message includes at least predetermined information, that is, session-id, SET capabilities, and a location identifier (lid). On the other hand, SET2 may provide NMR details (eg, TA, or RXLEV for GSM) for the radio technology currently in use (eg, GSM). In addition, SET2 may provide its location information (for example, the position value of SET2) to SLP2. In addition, SET2 may include a Requested Assistance data element in the SUPL POS INIT message, while SET2 calculated by the information included in the SUPL POS INIT message received by SLP2 in step S11. Even though the position value of is coarse, if SET1 satisfies the requested QoP, SLP2 may proceed directly to the following step (ie, S13) without performing a SUPL POS session (ie, S12 below).

A SUPL POS session is performed between SET2 and SLP2 (S12). That is, positioning procedure messages are successfully exchanged between SET2 and SLP2, and the position value of SET2 is calculated. As described above, the position value of SET2 can be calculated by SLP2 in a SET-Assisted manner. In addition, through the SET-Based method, the position value of SET2 may be calculated by using assistance data supported by SLP2.

As described above, when the position value of SET2 is calculated, SLP2 sends a SUPL END message to SET2, thereby terminating the positioning session. At this time, SET2 terminates secure IP connection with SLP2 and releases all resources related to the positioning session.

In the above, the first procedure (ie, S1 to S6) for obtaining the position value of SET1 and the second procedure (ie, S8 to S13) for obtaining the position value of SET2 have been described. The position value of SET1 and the position value of SET2 obtained as described above are used to calculate correlation position information between SET1 and SET2.

Hereinafter, a procedure for calculating correlation position information between SET1 and SET2 will be described in detail.

SLP2 sends the position value of SET2 to SLP1 via the RLP protocol and releases all resources related to the session (RLP SSRLIA (SUPL END)) (S14). The RLP SSRLIA (SUPL END) message includes at least predetermined information, that is, session-id and posresult. In other words, the posresult of the information includes the position value of SET2. In addition, the posresult may include the position value of SET1 in addition to the position value of SET2. However, if the posresult includes the position value of SET1, SLP1 will provide the position value of SET1 to SLP2 in step S7, and SLP2 will deliver the position value of the provided SET1 back to SLP1.

SLP1 uses the position value of SET1 obtained through step S6 together with the position value of SET2 received from SLP2, and the correlation position information between SET1 and SET2 (for example, the distance and direction between SET1 and SET2). To calculate (S15). In other words, the calculation subject of the correlation position information between SET1 and SET2 is SLP1. This is because, in step S7, the calculate server parameter of the RLP SSRLIR (SUPL START) message points to, for example, the IP address of SLP1.

SLP1 may include the correlation position information (ie, distance and direction between SET1 and SET2) calculated in step S15 in the SUPL END message and send it to SET1 (S16). In this case, the correlation position information (ie, distance and direction between SET1 and SET2) is included in a predetermined parameter of the SUPL END message, that is, relative result. On the other hand, after SET1 receives the correlation location information, SET1 terminates the secure IP connection with SLP1 and releases all resources associated with this session. SLP1 also releases all resources associated with this session.

Meanwhile, in step S15, the correlation position information between the SET1 and the SET2 (that is, the distance and the direction between the SET1 and the SET2) may be calculated through a basic harvesting formula such as a trigonometric formula. In addition, the correlation location information may be displayed as coordinates on a map (for example, a map implemented by a graphical user interface (GUI), etc.) accumulated on each of the terminals (ie, SET1 and SET2) of the positioning target. will be. Therefore, a specific calculation formula for calculating the correlation position information may be obtained through various physical formulas or mathematical formulas, and thus the detailed description thereof will be omitted for the sake of brevity.

FIG. 2 is a signal flow diagram illustrating a method for SLP2 calculating correlation position information (distance and direction) between SET1 and SET2 according to a second embodiment of the present invention.

Compared with the first embodiment of FIG. 1, the first embodiment of FIG. 2 differs in calculating a correlation position information between SET1 (aka user terminal) and SET2 (aka target terminal). That is, in the case of the first embodiment of FIG. 1, SLP1 calculates correlation position information (for example, the distance and direction between SET1 and SET2) between SET1 and SET2. In contrast, in the case of the second embodiment of FIG. The correlation position information is calculated. That is, the location server (ie, SLP2) providing the location service to the target terminal SET2 calculates the correlation location information. Thus, the second embodiment of FIG. 2 is similar to the first embodiment of FIG. 1. However, only certain steps in FIG. 2 (that is, S7 ', S14', and S15 'in FIG. 2) are different. Accordingly, the reference numerals shown in FIG. 2 that are identical to the reference numerals shown in FIG. 1 have the same signal operation.

Hereinafter, for the sake of brevity of the description of the second embodiment of the present invention shown in FIG. 2, the same parts as the reference numerals of the first embodiment of FIG. 1 use the above-mentioned parts in the first embodiment, and FIG. 1. Only the corresponding part of the second embodiment of FIG. 2 as opposed to the first embodiment of FIG. 2 will be described.

The corresponding step S7 ′ of the second embodiment of FIG. 2 as compared with the step S7 of the first embodiment of FIG. 1 will now be described.

SLP1 sends a location request message (RLP SSRLIR SUPL START) to SLP2 using the RLP protocol (S7 '). In this case, the message (ie, RLP SSRLIR SUPL START) further includes predetermined information, that is, session-id, msid, client-id, QoP, request type, and calculate server. Here, the position value of SET1 is obtained through the step S6, and is included in a predetermined parameter of the message (that is, RLP SSRLIR SUPL START) (that is, posresult in S7 'of FIG. 2) and transmitted to SLP2. At this time, the SLP2 stores the position value of the SET1 in a predetermined memory or the like provided in the SLP2 and is used when calculating the correlation position information (that is, the correlation distance and the direction between the SET1 and the SET2) in the following step S14 '. In addition, among the predetermined information of the message (ie, RLP SSRLIR SUPL START), the calculate server may be assigned an address (eg, an IP address) of SLP2.

Hereinafter, corresponding steps S14 'and S15' of the second embodiment of FIG. 2 as compared with the steps S14 and S15 of the first embodiment of FIG. 1 will be described.

SLP2 uses the position value of SET1 received from SLP1 in step S7 'together with the position value of SET2 obtained through the steps S11 to S13, and the correlation position information between SET1 and SET2 (for example, , Distance and direction between SET1 and SET2) are calculated (S14 '). That is, the calculation subject of the correlation position information between SET1 and SET2 is SLP2. This is because the predetermined information of the RLP SSRLIR (SUPL START) message, that is, the calculate server parameter points to the IP address of SLP2 in step S7 '.

SLP2 transmits a session end message (RLP SSRLIA (SUPL END)) to SLP1 through the RLP protocol (S15 '). In this case, the message RLP SSRLIA (SUPL END) includes at least session-id and relative result information as well as posresult as predetermined information. In this case, the posresult parameter may further include a position value of SET1 and a position value of SET2. In addition, as a predetermined parameter, the relative result includes correlation position information (i.e., distance and direction between SET1 and SET2) calculated in step S14 '. Hereinafter, the predetermined steps S16 and other steps in FIG. 2 are the same as those of the first embodiment of FIG. 1.

Hereinafter, an embodiment of calculating n correlation position information existing between a user terminal (that is, a SET) and n target terminals will be described.

3 is a signal flowchart illustrating a method of calculating, by the H-SLP, n pieces of correlation location information (distance and direction) between a user terminal SET and n target terminals, according to a third embodiment of the present invention.

The third embodiment of FIG. 3 corresponds to the first embodiment of FIG. 1. However, while the embodiment of FIG. 1 calculates one piece of correlation location information between two terminals (ie, SET1 and SET2 in FIG. 1), the third embodiment of FIG. 3 uses a user terminal (that is, SET in FIG. 3). As a reference, n correlation position information existing between each of the n target terminals (that is, SET1 to SET n, but only SET n is shown in FIG. 3) and the user terminal is calculated. Here, n pieces of correlation position information, that is, correlation position information ranging from 'correlation position information between SET and SET2' to 'correlation position information between SET and SET n', including 'correlation position information between SET and SET1', in total n gangs Say it.

Hereinafter, only the first embodiment of FIG. 1 will be described in the third embodiment of FIG. 3 for the sake of brevity.

In step S2 of FIG. 3, in contrast to step S2 in the first embodiment of FIG. 1, the user terminal (ie, SET) may identify an ID of each of the n target terminals (ie, SET 1 to SET n) in the SUPL START message. The n number of msid parameters (ie, msid 1, msid 2,..., Msid n in FIG. 3) are transmitted to the home location server H-SLP (S2). In this case, the n msid parameters are included in the SUPL START message and transferred from the user terminal (ie, SET) to the home location server (H-SLP).

In step S7 ″ of FIG. 3 as compared to step S7 in the first embodiment of FIG. 1, the home location server H-SLP provides location services to each of n target terminals (ie, SET 1 to SET n). The RLP-based message (ie, RLP SSRLIR (SUPL START) message) is transmitted to each of the n location servers (that is, SLP 1 to SLP n) to be provided (S7 ″). Therefore, since the home location server H-SLP sends an RLP-based message corresponding to each of the n location servers (ie, SLP 1 to SLP n), the home location server H-SLP sends each location server. (Ie, the number of RLP-based messages sent to SLP 1 to SLP n) becomes n total. In this case, the RLP-based message is an msid parameter (ie, a target in FIG. 3) indicating a corresponding terminal (ie, target terminal, for example, SET 1), to which each location server (eg, SLP1) provides location services. Msid 1 parameter indicating the terminal SET 1). Here, the target terminal (for example, SET1) refers to a terminal provided with a location service from a location server (for example, SLP1) and located in a service area of the location server (that is, SLP1).

After the step S7 ", each of the location servers (i.e., SLP 1 to SLP n) is connected to each of the corresponding target terminals (i.e., SET 1 to SET n) and the target terminals (i.e., SET 1) through a positioning session. SET n) Send each location value to each H-SLP (S14 ''). Using the location value of each of the target terminals obtained from step S14 ″ and the location value of the user terminal (ie, SET), the home location server H-SLP is connected to the user terminal (ie, SET). Each correlation location information existing between each target terminal is calculated (corresponding to S15 in FIG. 1). In this case, the calculated correlation position information may be n correlation position information established with n target terminals based on the user terminal. The calculated correlation location information is transferred from the home location server (H-SLP) to the user terminal (ie, SET). In the third embodiment of the present invention, other procedures that are not advanced utilize the procedure of the first embodiment of FIG.

4 illustrates a method of calculating, by each location server (ie, SLP1 to SLP n), respective correlation location information (distance and direction) existing between a user terminal (SET) and n target terminals. Is a signal flow diagram.

Compared to the third embodiment of FIG. 3, the fourth embodiment of the present invention differs from each other in that the subjects for calculating the correlation position information are different from each other. Therefore, the same parts as those in the third embodiment of FIG. 3 are also applied to the description of the fourth embodiment of the present invention.

Hereinafter, a fourth embodiment of the present invention will be described in comparison with the third embodiment of FIG. 3.

In contrast to the step S7 " of FIG. 3 and the step S7 '" of FIG. 4, each RLP-based message (RLP SSRLIR (SUPL START) message) is the step S7 " of FIG. It further includes the position value of the user terminal (ie, SET) than the message of.

In the third embodiment of FIG. 3, the home location server H-SLP calculates correlation location information between the user terminal SET and each target terminal. In contrast, in the fourth exemplary embodiment of FIG. 4, a location server (eg, SLP n among SLP1 to SLP n) that provides location service to each target terminal (for example, SET n of SET 1 to SET n). Calculates the correlation position information (e.g., distance and direction between SET and SET n) using the position value of the user terminal SET and the position value of the target terminal (i.e., SET n) (S14 '' ' )All. Each of the location servers (ie, SLP1 to SLP n) transfers the calculated correlation location information to the home location server H-SLP.

In the above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. will be. For example, in the above-described embodiment of the present invention, a distance and a direction between two terminals (that is, a user terminal and a target terminal) have been proposed as examples of the correlation location information, but this is merely an example of the present invention. The meaning is not limited only to the above information (ie distance and direction). Accordingly, the correlation location information between the two terminals may have a comprehensive meaning including a longitude and latitude difference, an altitude difference, an administrative division, or various communication service region divisions between the two terminals. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, the present invention has an effect of calculating the correlation position information between the user terminal and the counterpart terminal (ie, the target terminal) and providing the same to the user terminal.

In addition, in the second and fourth embodiments of the present invention, since the location server providing the location service to the target terminal calculates the correlation location information, the home location server (ie, SLP1 and FIG. 4 in FIG. 2). H-SLP) has an effect of reducing the workload.

Claims

In a location information system based on SUPL (Secure User Plane Location), a method of calculating correlation location information between a user terminal and at least one target terminal,

A first location server receives an msid parameter for identifying an ID of the target terminal and a request type indicator indicating a request for calculating correlation location information from the user terminal,

Acquiring a location value of the user terminal by the first location server through a positioning session between the user terminal and the first location server;

Determining, by the first location server, a second location server providing a service to the at least one target terminal based on the msid parameter;

Sending, by the first location server, a location request message (RLP SSRLIR SUPL START) to the determined second location server to obtain location values of the at least one target terminal;

The location request message is information for calculating correlation location information between the user terminal and the target terminal, an msid parameter for identifying an ID of the target terminal, a request type indicator indicating a request for calculating correlation location information, and At least one of a calculate server parameter that specifies a location server for calculating correlation location information;

Receiving, by the first location server, a location value of the target terminal obtained through a positioning session between the at least one target terminal and the second location server from the second location server;

Calculating, by the first location server, respective correlation position information between the user terminal and the at least one target terminal using the position value of the user terminal and the position value of the at least one target terminal;

And including, by the first location server, the calculated correlation location information in a relative result parameter of a SUPL END message and delivering the correlation location information to the user terminal.

The method according to claim 1,

Requesting to calculate respective correlation location information between the user terminal and the at least one target terminal;

And specifying the first location server as a location server for calculating the respective correlation location information between the user terminal and the at least one target terminal.

The method of claim 2,

Each of the correlation location information calculation request

determined by the request type indicator,

As the location server to calculate the respective correlation location information, the designation of the first location server

A method of calculating correlation location information, characterized in that determined by the calculate server parameter.

The method of claim 3, wherein the request type indicator and the calculate server parameter,

Embedded in RLP-based messages

And transmitting from the first location server providing the location service to the user terminal to each corresponding second location server providing the location service to the at least one target terminal.

The method of claim 1, wherein the correlation location information

And a distance and a direction between the user terminal and the at least one other terminal.

The method of claim 1, wherein the obtaining of the position value of the user terminal comprises:

The user terminal includes specific information for calculating the correlation position information in the SUPL START message

And transmitting the location information to the first location server for providing a location service to the user terminal.

The method of claim 6, wherein the specific information is

An msid parameter for identifying the target terminal;

And a request type indicator indicating a request for the correlation location information.

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Sending, by the first location server, a location request message (RLP SSRLIR SUPL START) to the determined second location server, wherein the location request message includes a location value of the user terminal, and the location request message is Information for calculating correlation position information between the user terminal and the target terminal, an msid parameter for identifying an ID of the target terminal, a request type indicator indicating a request for calculating correlation position information, and calculating the correlation position information; Include at least one of the calculate server parameters specifying a location server;

Obtaining, by the second location server, a location value of the target terminal through a positioning session between the at least one target terminal and the second location server;

The second location server uses the user terminal and the at least one target terminal by using the location value of the user terminal received from the first location server through the location request message and the obtained location value of the target terminal. Calculating respective correlation position information therebetween;

Including, by the second location server, the calculated correlation location information in a relative result parameter of a SUPL END message, and delivering the correlation location information to the user terminal through the first location server. Way.

The method of claim 10, wherein the calculate server parameter

Correlating position information calculation method, characterized in that for designating the second position server as a position server for calculating the respective correlation position information between the user terminal and the at least one target terminal.

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In the method for providing a location service of a specific terminal using at least one terminal and at least one location server,

Receiving, by the first location server, first information from the first terminal, wherein the first information includes a plurality of msid parameters for identifying each of the plurality of target terminals and a request indicating a request for calculating correlation location information; includes a type indicator;

Determining, by the first location server, each of a plurality of second location servers each providing a service to each of the plurality of target terminals based on the msid parameter of the first information;

Transmitting, by the first location server, each of the plurality of determined second location servers by including the second information in the location request message, wherein the second information includes an msid parameter, a request type indicator, A calculate server parameter for designating a location server for calculating correlation location information and at least one of a location value of the first terminal;

Receiving, by the first location server, respective correlation location information calculated by each of the plurality of second location servers using the second information;

Transmitting each of the plurality of second location servers to each of the calculated position information of the first location server;

And transmitting, by the first location server, the calculated correlation location information to the first terminal.

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The method of claim 20, wherein the calculate server parameter is

And information indicating each of the plurality of second location servers for calculating the correlation location information.

Transmitting, by the first location server, each of the plurality of determined second location servers by including the second information in the location request message, wherein the second information includes an msid parameter, a request type indicator, At least one of a calculate server parameter that specifies a location server for calculating correlation location information;

Each of the plurality of second location servers

Calculating a location value of each target terminal in its corresponding service area and delivering the location value to the first location server;

Calculating, by the first location server, the respective correlation location information using each location value of the target terminals;

The method of claim 24, wherein the calculate server parameter is

And information indicating the first location server to calculate the correlation location information.

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