KR20070115550A - Location service providing system and method for providing triggered location request service - Google Patents

Abstract

A location information service system for supplying a triggered location request service and a method are provided to calculate a location of a target terminal according to a location calculation method selected by the target terminal, for a location service of the target terminal to be provided even when location calculation continuously is impossible with the currently set location calculation method. An H-SLP(Home-SUPL(Secure User Plane Location) Location Platform) server receives information on location calculation methods supportable by a target terminal(302) from the target terminal(302), sets priority of the methods to send the set priority to the terminal(302), and uses one method to provide a location service in accordance with a triggered location request service if information on the particular location calculation method is received from the terminal(302). If a condition in accordance with the triggered location request service is satisfied, the terminal(302) selects one of the methods suitable for the current propagation environment, sends information on the selected method to the server, and uses the method to provide the location service in accordance with the triggered location request service.

Description

LOCATION SERVICE PROVIDING SYSTEM AND METHOD FOR PROVIDING TRIGGERED LOCATION REQUEST SERVICE}

1 is a flowchart illustrating a method for providing a conditional repeating location information providing service according to the prior art;

2 is an exemplary view showing an example of information and parameters for a position calculation method in the conditional repeating position information providing service according to the prior art;

3 is a flowchart illustrating a method for providing conditional repetitive location information providing service in a location service providing system according to an embodiment of the present invention;

4 is an exemplary diagram of POSMETHOD_list provided in an H-SLP according to an embodiment of the present invention;

5 is a block diagram showing the configuration of the H-SLP in the location service providing system according to an embodiment of the present invention;

6 is a flowchart of an operation of generating an POSMETHOD_list by the H-SLP when receiving a SUPL TRIGGERED START message from a target terminal in a location service providing system according to an embodiment of the present invention;

7 is a block diagram showing a configuration of a target terminal in a location service providing system according to an embodiment of the present invention;

8 is a flowchart illustrating an operation of selecting a proper location calculation method by a target terminal receiving a POSMETHOD_list in a location service providing system according to an embodiment of the present invention;

9 is a flowchart illustrating an operation of generating a POSMETHOD-list by an H-SLP in a location service providing system according to a second embodiment of the present invention;

FIG. 10 is a flowchart illustrating an operation of selecting, by a target terminal, a location calculation method included in a POSMETHOD_list received from the H-SLP in a location service providing system according to a second embodiment of the present invention.

The present invention relates to a location service providing system and method, and more particularly to a location service providing system and method for providing a conditional repeating location information providing service.

As demand for various location-related services based on location increases, various location services using the location of a mobile terminal are provided, and development for expansion of location services has been made. And the expansion of location services is expected to be the basis of 4G communication service.

Recently, a conditional repeated location request service has been provided as a location service. Conditional repetitive location information providing service is a service that provides the location service requester with the fact that the event occurs when the location value of the target terminal meets a predetermined condition while setting the condition repeatedly and repeatedly calculating the location value of the terminal periodically or aperiodically. to be.

This conventional conditional repetitive location information providing service providing method will be described with reference to FIG. 1 is a flowchart illustrating a method for providing conditional repetitive location information providing service according to the prior art. Referring to FIG. 1, a location service requester (Secure User Plane Location AGENT, hereinafter referred to as 'SUPL AGENT') 104 uses a MLP TLRR (Mobile Location Protocol Triggered Location Reporting Request) message to provide a location server (Home-SUPL Location). A conditional repetitive location information providing service is requested to the Platform (hereinafter referred to as “H-SLP”) 100.

In addition, when the MLP TLRR message is received from the SUPL AGENT 104, the H-SLP 100 proceeds to step 108 to determine routing information of the target terminal 102. That is, the H-SLP 100 determines whether the target terminal 30 is roaming, and determines whether the target terminal 102 uses SUPL.

In step 110, the H-SLP 100 transmits a SUPL INIT (Initiation Service Request Initial Message) message to the target terminal 102 according to the routing information determination result of the target terminal. In this case, the SUPL INIT message includes a SESSION_ID, which is an ID for distinguishing a message exchange between the H-SLP 20 and the target terminal 30, a POSMETHOD (Positioning Method) indicating a location calculation method, and a trigger type indicator indicating a condition for determining whether an event occurs. and non proxy mode indicators. In addition, this may also include a quality of positioning (QoP) indicating a measurement level of the required position information.

When the target terminal 102 receives the SUPL INIT message from the H-SLP 100, the target terminal 102 checks whether the H-SLP 100 is in proxy mode or proxy mode. Then, it connects to a data network such as a packet data network or a circuit switched data network according to the proxy mode check result.

When the data network connection with the H-SLP 100 is completed, the target terminal 102 performs a SUPL TRIGGERED START message for starting the conditional repetitive location information providing service in step 114 (conditional repetitive location information providing service start message). To the H-SLP 100. In this case, the SUPL TRIGGERED START message includes a SESSION_ID, which is an ID for distinguishing the message exchange between the H-SLP 100 and the target terminal 102, SET capabilities indicating a location calculation capability, a hash of the received SUPL INIT message (ver), location identifier (lid) and so on. Here, the SET capabilities are information on positioning methods (ie, POSMETHODs) supported by the target terminal 102, that is, information on, for example, SET-Assisted A-GPS, SET-Based A-GPS, and the like. RRLP, RRC It includes information on the associated positioning protocols, such as TIA-801. 2 is a diagram illustrating an example of such POSMETHOD information.

When the H-SLP 100 receives the SUPL TRIGGERED START message, the H-SLP 100 compares its location measurement capability with information included in the SET capabilities of the target terminal 102 and determines an appropriate location calculation method. . In operation 116, the H-SLP 100 transmits a SUPL TRIGGERED RESPONSE message (conditional repetitive location information providing service response message) including information on the determined location calculation method, to the target terminal 102. In operation 118, the H-SLP 100 notifies the SUPL AGENT 104 that the conditional repetitive location information providing service request has been accepted using the MLP TLRA (Mobile Location Protocol Triggered Location Reporting ACQUISITION) message. In addition, the REQ_ID to be used as a Transaction ID is transmitted while the conditional repeating location information providing service is performed. Then, the H-SLP 100 and the target terminal 102 may terminate the currently connected data network connection.

In step 120, the target terminal 102 determines whether the transmission condition of the location information is satisfied. The target terminal 102 reconnects to the data network according to the determination result and transmits a SUPL POS REPORT message (location information report message) to the H-SLP 100. The SUPL POS REPORT message includes a SEESION-ID and a LOCATION Identifier (LID). Then, the H-SLP 100 and the target terminal 102 proceed to step 124 to calculate the location of the target terminal 102. Here, if the location information of the target terminal according to the LID included in the SUPL POS REPORT message satisfies a preset QoP, the H-SLP 100 and the target terminal 102 proceed to step 124 to determine the determined location. The position of the target terminal 102 is calculated through the calculation method.

When the location of the target terminal 102 is calculated, the H-SLP 100 proceeds to step 126 and uses the MLP TLREP (Mobile Location Protocol Triggered Location Report) message including the result to the target SUPL AGENT 104. Report the location of the terminal 102. In addition, the H-SLP 100 and the target terminal 102 satisfy the condition of performing the conditional repetitive location information providing service required by the SUPL AGENT 104, that is, for example, the target terminal 102 has reached a specific position. Or, if the preset time for executing the location service ends, the conditional repeating location information providing service ends.

Accordingly, in the conventional conditional repetitive location information providing service providing method, the event occurrence request requested by the location service requester, that is, the SUPL AGENT 104 is compared with a preset condition, and the process of repeatedly reporting the event occurrence result is performed. do. Therefore, in the conventional conditional repetitive location information providing service providing method as described above, the H-SLP 100 selects any one of the position calculation methods included in the SET Capability of the SUPL TRIGGERRED START message 114 at the start stage. When the conditional repetitive location information providing service is terminated, the location of the target terminal 102 is obtained using the same location calculation method repeatedly.

However, in contrast to finding only one location like the existing immediate service, the conditional repetitive location information providing service must calculate the location periodically over a long time such as 24 hours and 72 hours. Therefore, the situation of the target terminal 102 may change. That is, for example, the target terminal 102 may obtain a location using a global positioning system (GPS) and then move to a location where a GPS signal is not received, or a cell base station (BS) such as a time difference of arrival (TDOA). The location may be determined using the distance information from the data, but the number of neighboring cells may be less than three, thus changing to a situation where the TDOA method cannot be used.

Therefore, in such a case, in the conditional repeating location information providing service, if the location calculation method determined in the conditional repeating location service start step (steps 114 and 116) is not available, a positioning error occurs and the service is terminated. Therefore, the SUPL AGENT 104 has a problem in that it cannot be provided with a service for a time required by the SUPL AGENT 104.

Therefore, an object of the present invention, even if the target terminal is moved to another place in the conditional repeating position information providing service, and the predetermined position calculation method cannot be used, the conditional repeating position information providing service continues to be provided. The present invention provides a system and a method for providing a location service.

The location service providing system of the present invention for achieving the above object, from the target terminal, receives information about the location calculation methods that can be supported by the target terminal, by setting the priority of the location calculation methods to the target terminal A location server using the location calculation method for providing a location service according to the conditional repetitive location information providing service when information on a specific location calculation method is received from the target terminal after transmitting to the request information of the location server; In response to, transmitting information about supportable location calculation methods, receiving and storing a location calculation method including priority information for the location calculation methods from the location server, and providing the conditional repetitive location information. If the conditions according to the service are met, the current in the order of priority Select one of the location calculation methods suitable for the propagation environment, transmit information on the selected location calculation method to the location server, and provide the location calculation method according to the conditional repetitive location information providing service. It includes a target terminal to use.

The method may further include: an initial message transmission step of a location server transmitting a location service request initial message to the target terminal, the target terminal connecting to the location server and a data network in response to the location service request initial message; A start message transmission step of transmitting a conditional repetitive location information providing service start message including information on location calculation methods supported by the target terminal to the location server, and the location server transmitting the conditional repeating location start message; And a priority setting step of setting a priority for each of the location calculation methods supported by the target terminal and a location calculation method including the set priority by the location server. Response message transmitted to the target terminal using A transmitting step, a condition satisfying determining step of checking whether the target terminal satisfies the condition according to the conditional repetitive location information providing service, and when the target terminal satisfies the condition according to the conditional repetitive location information providing service. Selection information for selecting one of the position calculation methods having the highest priority among the position calculation methods currently available in the propagation environment of the target terminal, and transmitting the position calculation method information according to the selected position calculation method to the location server. A transmitting step, a location calculating step of calculating the location of the target terminal by the target terminal and the location server according to the selected location calculation method, and the location server determining the location of the calculated target terminal by the conditional repeating location. Providing the information providing service requester.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are denoted by the same reference numerals wherever possible. In the following description and the annexed drawings, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

First of all, in order to help a full understanding of the present invention, the basic principles of the present invention will be described. In the present invention, the H-SLP may select the location according to a preset priority setting condition among a plurality of location calculation methods supported by the target terminal. Priority of the calculation methods is set, and priority information according to each location calculation method can be transmitted to the target terminal. The target terminal receives the information on the position calculation methods including the priority and allows the target terminal to select the position calculation method having the highest priority among the position calculation methods currently available in its propagation environment. In addition, the H-SLP and the target terminal can calculate the position of the target terminal according to the position calculation method selected by the target terminal, so that even if it is difficult to calculate the position by the currently set position calculation method according to the change of the radio wave environment The location service of the terminal can be provided.

3 is a flowchart illustrating a method for providing conditional repetitive location information providing service in a location service providing system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, in the location service providing system according to an exemplary embodiment of the present invention, the SUPL AGENT 104 provides conditional repetitive location information providing service to the H-SLP 300 using an MLP TLRR message in step 304. If requested, the H-SLP 300 proceeds to step 306 to determine routing information of the target terminal 302. In step 308, the H-SLP 300 transmits a SUPL INIT message to the target terminal 302 according to the routing information determination result of the target terminal.

When the target terminal 302 receives the SUPL INIT message from the H-SLP 300, the target terminal 302 checks whether the H-SLP 300 is in proxy mode or proxy mode. Then, it connects to a data network such as a packet data network or a circuit switched data network according to the proxy mode check result.

When the data network connection with the H-SLP 300 is completed in step 310, the target terminal 302 proceeds to step 312 with a SUPL TRIGGERED START message for starting the conditional repetitive location information providing service. To). At this time, the SUPL TRIGGERED START message includes a SESSION_ID, which is an ID for distinguishing a message exchange between the H-SLP 300 and the target terminal 302, as in a general conditional repeating location information providing service, SET capabilities indicating a location calculation capability, and a hash. of the received SUPL INIT message (ver), location identifier (lid), etc. Here, the SET capabilities include information about positioning methods (ie, POSMETHODs) and associated positioning protocols supported by the target terminal 302. The POSMETHOD information is as shown in FIG. 2.

When the SUPL TRIGGERED START message is received in step 312, the H-SLP 300 proceeds to step 314 to select and prioritize location calculation methods included in the SUPL TRIGGERED START message according to a preset priority setting condition. Set. Alternatively, one or more location calculation methods that can be commonly used by the H-SLP 300 and the UE are selected without priorities. Here, the H-SLP 300 may select only the location calculation methods that the H-SLP 300 itself can provide among the location calculation methods included in the SET-capability of the terminal, the preference of the operator or the policy charging of the operator. It may be chosen according to various conditions such as policy, quality of service (here, accuracy of location value or amount of time it takes to calculate location). In addition, it is a matter of course that the priority may be selected in order of high priority according to the preset priority setting condition.

 Here, the preset priority setting condition may be variously set according to the operator's policy or the user's selection. That is, for example, the priority of the location calculation methods may be determined based on accuracy, that is, QoP, or the priority is determined according to the cost of the location calculation of the target terminal 302 or the time required for the location calculation. You may lose. The H-SLP 300 sets priorities of location calculation methods that the target terminal 302 included in the SUPL TRIGGERED START message can support according to the preset priority setting condition.

When the priority of the position calculation methods is set, the H-SLP 300 generates a SUPL TRIGGERED RESPONSE message including the set priority information and information on the position calculation methods corresponding to the priority. In operation 316, the H-SLP transmits the generated SUPL TRIGGERED RESPONSE message to the target terminal 302. The priority information and information on location calculation methods corresponding to the priority information may be provided to the target terminal 302 in the form of a list (POSMETHOD_list). In this case, as described in step 316 of FIG. 3, the SUPL TRIGGERED RESPONSE message includes the POSMETHOD_list and is transmitted to the target terminal 302.

FIG. 4 is priority information provided in the SUPL TRIGGERED RESPONSE message provided by the H-SLP 300 according to the embodiment of the present invention, and information in the form of a list for position calculation methods corresponding to the priority, respectively. That is, the figure shows an example of POSMETHOD_list.

In operation 318, the H-SLP 300 notifies the SUPL AGENT 104 of the conditional repetitive location information providing service request through the MLP TLRA message. The target terminal 302 receiving the SUPL TRIGGERED RESPONSE message stores the location calculation methods and priority information corresponding to the location calculation methods from the SUPL TRIGGERED RESPONSE message. Then, the H-SLP 300 and the target terminal 302 may terminate the currently connected data network connection.

In step 320, the target terminal 302 determines whether the location information transmission condition is satisfied. When the transmission condition of the location information is satisfied, the target terminal 302 proceeds to step 322 and selects the location calculation method having the highest priority among the stored location calculation methods. The target terminal 302 then checks whether the selected location calculation method is available according to the currently selected location calculation method. If the selected location calculation method is available, the target terminal 302 proceeds to step 324 in which the priority information (PRIORITY_INDEX) of the currently selected location calculation method and the information about the currently selected location calculation method (POSMETHOD) are SUPL POS REPORT messages. Included in the transmission to the H-SLP (300).

However, if the propagation environment of the target terminal 302 is not available in the step 322, the selected position calculation method is not available, the target terminal 302 takes precedence of the currently selected position calculation method among the stored position calculation methods. Choose the method of calculating the position with the highest rank. The target terminal 302 checks whether the currently selected location calculation method is available according to the currently selected location calculation method.

This assumes that the current highest priority position calculation method uses GPS and the next highest priority position calculation method uses TDOA. In step 322, the target terminal 302 has the highest priority. Select a location calculation method, that is, a location calculation method using GPS. Then, it is checked whether the current transmission / reception state of the GPS signal is determined to determine whether the transmission / reception state of the GPS signal is greater than or equal to a predetermined threshold value that can be used for position calculation. If the GPS signal is greater than or equal to a predetermined threshold, the target terminal 302 selects a location calculation method using GPS, and the corresponding priority information along with information on the location calculation method using GPS and H-SLP ( 300). Then, the H-SLP 300 and the target terminal 302 proceed to step 326 to calculate the position of the target terminal 302 according to the position calculation method using GPS. In operation 328, the H-SLP 300 provides the calculated location information of the target terminal 302 to the SUPL AGENT 104.

However, if the GPS signal is a certain threshold signal is less than a certain threshold, the target terminal 302, the priority calculation position next to the priority corresponding to the currently selected position calculation method, that is, TDOA Select the position calculation method used. The target terminal 302 checks whether the currently selected location calculation method can be used in the current propagation environment using the location calculation method using the TDOA, that is, whether there are at least three Cell BSs for which distance information can be obtained. . And if the current propagation environment of the target terminal 302 is suitable to use the location calculation method using TDOA, the target terminal 302 selects a location calculation method using TDOA, and for the location calculation method using TDOA The priority information corresponding to the information is transmitted to the H-SLP 300. Then, the H-SLP 300 and the target terminal 302 proceed to step 326 to calculate the position of the target terminal 302 according to the position calculation method using the TDOA. In operation 328, the H-SLP 300 provides the calculated location information of the target terminal 302 to the SUPL AGENT 104.

5 is a block diagram showing the configuration of the H-SLP 300 in the location service providing system according to an embodiment of the present invention.

Referring to FIG. 5, the H-SLP 300 according to an embodiment of the present invention may include an H-SLP control unit 500, a priority setting unit 504 and an H- connected to the H-SLP control unit 500. The SLP memory unit 502, the H-SLP message generator 510, the SUPL AGENT interface 506, and the target terminal interface 508 are configured to be included.

Here, the H-SLP control unit 500 controls each component and overall operation of the H-SLP 300. In particular, when the conditional repetitive location information providing service is requested from the SUPL AGENT 104, the H-SLP control unit 500 includes a parameter indicating that a conditional repetitive location information providing service request is included in the target terminal 302. Transmit to the target terminal 302 so that it can know which service is started. When the H-SLP control unit 500 receives information on the location calculation methods supported by the target terminal 302 from the target terminal 302, the H-SLP control unit 500 selects at least one of them and sets a preset priority. Set priorities for the respective position calculation methods according to the conditions. In addition, information on the position calculation methods, which are set in priority, is included in the SUPL TRIGGERED RESPONSE message and transmitted to the target terminal 302.

If the condition according to the conditional repetitive position information providing service request from the preset SUPL AGENT 104 is satisfied, the target terminal 302 receives information on the position calculation method currently available to the target terminal 302. According to this, the position of the target terminal 302 is calculated, or position assistance information, that is, A-GPS (Assistant Global Positioning System) information and orbit information of a satellite that can be currently communicated to the target terminal 302 by passing it to the target terminal 302. Allow 302 to calculate the location.

The H-SLP memory unit 502 connected to the H-SLP control unit 500 includes a read only memory (ROM), a flash memory, a random access memory (RAM), and the like. . The ROM stores a program for processing and controlling the H-SLP control unit 500 and various reference data. The RAM provides a working memory of the H-SLP controller 500, and the flash memory provides an area for storing various updatable data for storage. The flash memory may include a storage area for storing information about location calculation methods supported by the target terminal 302 from the target terminal 302. The flash memory may further include a storage area for storing priority setting condition information for setting priorities of the position calculation methods received from the target terminal 302. Here, the priority setting condition information may include, for example, a plurality of location calculation methods according to the priority setting conditions (for example, QoP priority, cost priority, etc.) of the designer or operator or the user of the H-SLP 300. This may be information that has been set in advance for each of them. Then, when the H-SLP control unit 500 receives the position calculation methods that the target terminal 302 can support from the target terminal 302, the H-SLP control unit 500 may compare the information with the priority setting condition information and set the priority of each other. have. Hereinafter, the storage area of the H-SLP memory unit 502 in which the information on the location calculation method is stored will be referred to as the location calculation method information storage unit 512. The storage area in which the priority setting condition information is stored is given priority. The ranking setting condition information storage unit 514 will be referred to.

The priority setting unit 504 sets priorities for the position calculation methods received from the target terminal 302 according to a preset priority setting condition. As described above, the priority setting condition may be variously set according to a policy of an operator or a user selection.

The H-SLP message generator 510 generates various messages transmitted to the SUPL AGENT 104 and the target terminal 302 under the control of the H-SLP controller 500. These messages include SUPL TRIGGERED RESPONSE messages. Therefore, when the position calculation method information of which priority is set from the H-SLP control unit 500 is applied through the priority setting unit 504, the H-SLP message generating unit 510 generates a SUPL TRIGGERED RESPONSE message including the same. Here, the position calculation method information in which the priority is set may be included in the SUPL TRIGGERED RESPONSE message in the form of POSMETHOD_list. Then, the generated SUPL TRIGGERED RESPONSE message is applied to the H-SLP control unit 500 so that the H-SLP control unit 500 can transmit the target terminal 302.

The SUPL AGENT interface 506 and the target terminal interface 508 provide interfacing for exchanging various messages with SUPL AGENT and interfacing with the target terminal 302, respectively, from the H-SLP control unit 500. Various authorized messages are transmitted to the SUPL AGENT 104 or the target terminal 302. In addition, various messages received from the SUPL AGENT 104 or the target terminal 302 are transmitted to the H-SLP control unit 500.

FIG. 6 is a flowchart illustrating an operation in detail of step 314 of FIG. 3 to generate a POSMETHOD_list when the H-SLP 300 shown in FIG. 5 receives the SUPL TRIGGERED START message from the target terminal 302. In the following description, as shown in FIG. 4, the H-SLP control unit 500 according to an embodiment of the present invention has priority information of each location calculation method and information on location calculation methods corresponding to the priority, respectively. Will be described assuming that the information in the form of List, that is, POSMETHOD_list is created and included in the SUPL TRIGGERED RESPONSE message.

Referring to FIG. 6, when the H-SLP 300 of the location service providing system according to an exemplary embodiment of the present invention receives the SUPL TRIGGERED START message from the target terminal 302, the H-SLP 300 proceeds to step 600 and receives the received SUPL TRIGGERED START. Extract information about the location calculation methods from the message. In operation 602, the H-SLP 300 caters to at least one or more location calculation methods and calculates the location extracted in step 600 according to a preset priority setting condition through the priority setting unit 504. Set the priority of each method.

In step 604, the H-SLP 300 generates POSMETHOD_list by sorting the information on the location calculation methods extracted in step 600 according to the corresponding priority information. The POSMETHOD_list includes information on location calculation methods that the target terminal 302 can support (for example, various parameters, a description, a value, etc.) and priority information of each location calculation information.

 In operation 606, the H-SLP 300 generates a SUPL TRIGGERED RESPONSE message including the POSMETHOD_list through the H-SLP message generator 510. The H-SLP 300 then proceeds to step 316 of FIG. 3 and transmits a SUPL TRIGGERED RESPONSE message including POSMETHOD_list to the target terminal 302. Therefore, the target terminal 302 can check the priority set by the H-SLP 300 for the location calculation methods that can be supported through the SUPL TRIGGERED RESPONSE message.

7 is a block diagram of the target terminal 302 in the location service providing system according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the target terminal 302 according to an embodiment of the present invention may include a terminal controller 700, a terminal memory unit 702 connected to the terminal controller 700, a position calculation method selection unit 708, And a terminal message generating unit 706 and an H-SLP interface 704. Here, the terminal controller 700 controls each component of the target terminal 302 and performs a function unique to the target terminal 302 according to a user's request. When the SUPL INIT message for the start of the conditional repetitive location information providing service is received, the terminal controller 700 sends a SUPL TRIGGERED RESPONSE message in response to the information on the location calculation methods that can be supported by the current target terminal 302. Include in and send. When the POS-METHOD_list including the information on the position calculation method that the target terminal 302 can support and the priority information of each position calculation information is received from the H-SLP 300, the H-SLP 300 stores the POSMETHOD_list.

The terminal controller 700 checks whether a condition according to the conditional repetitive location information providing service is satisfied. Here, the condition according to the conditional repetitive location information providing service may be a period set for providing a location service expires, or whether the target terminal 302 has arrived at a specific location. When the condition is satisfied, the terminal controller 700 loads the stored POSMETHOD_list and extracts priority information of each position calculation information. The highest priority position calculation method is selected, and it is checked whether the currently selected position calculation method is currently available in its propagation environment.

The terminal controller 700 selects a position calculation method having the highest priority next to the priority according to the currently selected position calculation method when the currently selected location calculation method is not available. Then check again whether the currently selected position calculation method is available. If the selected position calculation method is not available at this time, the process of checking the availability by selecting the position calculation method according to the next priority again is repeated.

When the location calculation method available in the current propagation environment is selected through this repetition process, the terminal controller 700 provides information on the currently selected location calculation method and priority information on the currently selected location calculation method. Transmit to SLP 300. The terminal controller 700 starts SUPL POS SESSION for calculating its position according to the currently selected position calculation method. In this SUPL POS SESSION, the target terminal 302 receives location assistance information from the H-SLP 300, and the terminal controller 700 may directly calculate its own location, or the target terminal 302 ) May provide the H-SLP 300 with its location information or location assistance information to allow the H-SLP 300 to calculate the location of the target terminal 302.

The location calculation method selection unit 708 checks whether the location calculation methods that the target terminal 302 can support are available in the current propagation environment in the order of high priority set by the H-SLP 300. The location calculation method having the highest priority set by the H-SLP 300 is selected among the location calculation methods available in the current propagation environment. To this end, the position calculation method selector 708 may further include a position calculation environment sensor 710.

Here, the position calculation environment sensing unit 710 checks whether the position calculation method selected according to the priority is usable in the current propagation environment. That is, for example, if the currently selected location calculation method uses GPS, the location calculation environment sensor 710 checks whether the reception state of the current GPS signal has a strength greater than or equal to a preset threshold. If the reception state of the GPS signal is less than the preset threshold, the location calculation environment sensing unit 710 determines that it is difficult for the current radio wave environment of the target terminal 302 to calculate the location using GPS. Inform).

Then, the position calculation method selection unit 708 selects the position calculation method corresponding to the priority next to the priority of the currently selected position calculation method. The position calculation method selection unit 708 again checks whether the currently selected position calculation method is available using the position calculation environment sensor 710. The location calculation environment detection unit 710 then checks whether the newly selected location calculation method is currently available in the propagation environment of the target terminal 302. And informs the position calculation method selector 708 if it is available, if available. The position calculation method selection unit 708 then recognizes that the currently selected position calculation method is usable in the current propagation environment and informs the terminal controller 700 of this. Accordingly, the target terminal 302 and the H-SLP 300 according to an embodiment of the present invention may be configured by the H-SLP 300 among the position calculation methods available in the current propagation environment of the target terminal 302. The location of the target terminal 302 may be calculated through the location calculation method having the highest priority, and the location information service may be provided to the SUPL AGENT 104.

The terminal memory unit 702 connected to the terminal controller 700 includes a read only memory (ROM), a flash memory, a random access memory (RAM), and the like. The ROM stores a program for processing and controlling the terminal controller 700 and various reference data. The RAM provides a working memory of the terminal controller 700, and the flash memory provides an area for storing various updatable data for storage. The flash memory may include a storage area for storing POSMETHOD_list when it is received from the H-SLP 300. Hereinafter, a storage area for storing the POSMETHOD_list will be referred to as a POSMETHOD_list storage 712.

The flash memory also provides a storage area for storing information on location calculation methods that can be supported by the target terminal 302 and information about a propagation environment required by the respective location calculation methods. The information on the position calculation methods that can be supported by 302 and the information about the propagation environment required by the respective position calculation methods will be referred to as position calculation information) and the position calculation information for each of these position calculation methods. Contains information about the propagation environment available for each location calculation method.

That is, in the case of the position calculation method using the GPS, for example, the signal strength of the GPS signal should be greater than or equal to a threshold set for calculating the position of the target terminal. Therefore, in the case of the position calculation method using the GPS, the position calculation information thereof includes information on the GPS signal strength threshold and the GPS signal. In the case of a position calculation method using TDOA, a signal received from at least three Cell BSs must be sensed by more than a predetermined signal strength. Therefore, in the case of the position calculation method using the TDOA, the position calculation information thereof includes information on the signal strength threshold value of the base station signal received from the Cell BS and the minimum number of necessary base station signals.

Accordingly, the target terminal 302 can recognize which location calculation method it is currently able to support according to such location calculation information, and information on the propagation environment required in each of these location calculation methods. Hereinafter, the storage area of the terminal memory unit 702 in which such position calculation information is stored will be referred to as a position calculation information storage unit 706.

The terminal message generator 706 generates various messages for exchanging with the H-SLP 300 under the control of the terminal controller 700. Such a message includes a SUPL POS REPORT message having information on a location calculation method selected as suitable in the current propagation environment, that is, PRIORITY_INDEX and POSMETHOD for a specific location calculation method through the location calculation method selection unit 708. The terminal message generator 706 applies various messages including the SUPL POS REPORT message to the terminal controller 700.

In addition, the H-SLP interface 704 provides an interface for exchanging various messages with the H-SLP 300 under the control of the terminal controller 700. Therefore, various messages received from the H-SLP 300 are provided to the terminal controller 700 or various messages under the control of the terminal controller 700 are transmitted to the H-SLP 300.

FIG. 8 is a diagram illustrating an operation of selecting an appropriate location calculation method after a target terminal 302 of a location service providing system according to an embodiment of the present invention receives a POSMETHOD_list.

Referring to FIG. 8, the target terminal 302 according to an embodiment of the present invention proceeds to step 800 when the preset condition is met for the provision of the conditional repetitive location information providing service, and the H-SLP 300 is performed. The POSMETHOD_list information provided from) is loaded from the POSMETHOD_list storage unit 712. In operation 802, the target terminal 302 selects a location calculation method having the highest priority among the location calculation methods of the POSMETHOD_list loaded in step 800.

In operation 804, the target terminal 302 loads location calculation information corresponding to the currently selected location calculation method, that is, information on the propagation environment of the currently selected location calculation method, from the location calculation information storage unit 706. . Then, it is determined whether the currently selected location calculation method is suitable for the current propagation environment according to the loaded location calculation information.

If the selected position calculation method is available in the propagation environment of the current target terminal 302 as a result of the determination in step 804, the target terminal 302 proceeds to step 806 to obtain information on the position calculation method currently selected from the POSMETHOS_list. Extract Here, the information extracted by the target terminal 302 includes the priority (PRIORITY_INDEX) of the selected position calculation method and information (POSMETHOD) including various parameters of the selected position calculation method as shown in FIG. 2. Can be. In operation 808, the target terminal 302 generates a SUPL POS REPORT message including the extracted information.

However, if it is determined that the currently selected location calculation method is not suitable for the current propagation environment according to the position calculation information loaded in step 804, it is determined that the currently selected location calculation method is not suitable for the current propagation environment. If so, the target terminal 302 proceeds to step 810 and selects the position calculation method having the highest priority next to the priority according to the currently selected position calculation method. In operation 804, the position calculation information storage unit 706 loads position calculation information corresponding to the currently selected position calculation method, that is, information on the propagation environment of the currently selected position calculation method. Then, it is determined whether the currently selected location calculation method is suitable for the current propagation environment according to the loaded location calculation information. According to the determination result, the process proceeds to step 806 or step 810 again to search for a location calculation method available in the current propagation environment in the order of priority set in the POSMETHO_list. Therefore, in the present invention, when the condition according to the conditional repetitive location information providing service is satisfied, the location information of the target terminal 302 is provided to the SUPL AGENT 104 through the location calculation method according to the current propagation environment. Therefore, in the present invention, a more reliable conditional repeating location information providing service can be provided.

In addition, in the above-described embodiment of the present invention, the H-SLP 300 transmits the methods for calculating the position of the target terminal 302 to the target terminal 302 by setting priorities according to preset conditions. Although it is disclosed, the H-SLP 300 may transmit the location calculation methods for which the priority is not set to the target terminal 302. In this case, the target terminal 302 selects at least one or more of the location calculation methods included in the POSMETHOD_list that can be used in the current environment, and selects information on the selected at least one location calculation method from the H-SLP 300. Of course it is possible to provide to. In this case, the H-SLP 300 may determine which of the at least one or more location calculation methods received from the target terminal 302 according to the above-described preset conditions, that is, the management policy or the cost priority of the operator and the tax policy. Select one and perform the position calculation of the target terminal 302 according to the selected position calculation method. Hereinafter, this embodiment of the present invention will be referred to as a second embodiment of the present invention.

9 is a flowchart illustrating an operation of generating a POSMETHOD_list of the H-SLP 300 in a location service providing system according to a second embodiment of the present invention. In addition, in the following description, the H-SLP control unit 500 according to an embodiment of the present invention generates information on at least one or more position calculation methods in List form, that is, POSMETHOD_list according to another embodiment of the present invention. It is assumed that it is included in the SUPL TRIGGERED RESPONSE message.

Referring to FIG. 9, when the H-SLP 300 of the location service providing system according to the second embodiment of the present invention receives a SUPL TRIGGERED START message from the target terminal 302, it proceeds to step 900 and receives the received SUPL. Extract information about the location calculation methods from the TRIGGERED START message. The H-SLP 300 proceeds to step 902 and generates a POSMETHOD_list including information on the location calculation methods extracted in step 900. The POSMETHOD_list includes information (for example, various parameters, a description, a value, etc.) about a location calculation method that the target terminal 302 can support.

 In operation 904, the H-SLP 300 generates a SUPL TRIGGERED RESPONSE message including the POSMETHOD_list through the H-SLP message generator 510. The H-SLP 300 then proceeds to step 316 of FIG. 3 and transmits a SUPL TRIGGERED RESPONSE message including POSMETHOD_list to the target terminal 302. The H-SLP 300 may store the selected POSMETHOD_List and reuse it as necessary during the ongoing triggered service. Accordingly, the target terminal 302 may receive information on at least one or more location calculation methods for which priority is not set from the H-SLP 300 through the SUPL TRIGGERED RESPONSE message. The target terminal 302 may store the POSMETHOD_List and use it as necessary during the ongoing triggered service.

In this case, the H-SLP 300 transmits an MLP TLRA message to the service requester, that is, the SUPL AGENT 104, as shown in step 318 of FIG. 3 to indicate that the requested service is started.

On the other hand, the target terminal 302, according to the second embodiment of the present invention, receives a POSMETHOD_list including at least one or more position calculation methods that are not prioritized. For each of the at least one location calculation method included, it is determined whether it is suitable for the current propagation environment. In addition, among the position calculation methods included in the POSMETHO_list, one or more position calculation methods suitable for the current propagation environment are checked, and a SUPL POS REPORT message including information about them is generated and transmitted to the H-SLP 300. .

10 is a diagram illustrating an operation process of the target terminal 302 of the present invention in the case of the second embodiment of the present invention.

Referring to FIG. 10, the target terminal 302 according to the second embodiment of the present invention satisfies a predetermined condition (eg, expiration of a preset reservation time) for providing a conditional repetitive location information providing service. In step 1000, the POSMETHOD_list information provided from the H-SLP 300 is loaded from the POSMETHOD_list storage 712. In operation 1002, information on at least one or more position calculation methods included in the POSMETHOD_list is extracted. In operation 1004, the target terminal 302 selects only those suitable for the current propagation environment from the extracted position calculation methods. Here, the process of selecting a location calculation method suitable for the current propagation environment, as described above, only the location calculation methods available for the current propagation environment, that is, the current environment of the network in which data for location calculation of the target terminal 302 is exchanged. It can be a process of selecting.

In operation 1006, the target terminal 302 includes information on at least one or more location calculation methods selected as suitable for the current propagation environment in the POSMETHOD_avail information. Here, the POSMETHOD_avail information refers to information for informing the H-SLP 300 of information on location calculation methods currently available to the target terminal 302 in the location service providing system according to the second embodiment of the present invention. will be.

In step 1006, if information on the location calculation methods available in the current propagation environment is included in the POSMETHOD_avail information, the target terminal 302 proceeds to step 1008 to generate a SUPL POS REPORT message including the POSMETHOD_avail information. do. In operation 324, the target terminal 302 transmits a SUPL POS REPORT message including the POSMETHOD_avail information to the H-SLP 300.

 Then, the H-SLP 300 according to the second embodiment of the present invention receives the POSMETHOD_avail information from the target terminal 302 through the SUPL POS REPORT message. Then, the H-SLP 300 selects any one of at least one or more location calculation methods included in the POSMETHOD_avail information, and starts the location calculation with the target terminal 302 accordingly. Therefore, in this case, in the second embodiment of the present invention, even if the propagation environment of the target terminal 300 has not changed since the conditional repetitive location service is started, the management policy and the taxation policy of the operator providing the location information in the current state It is advantageous in that the preferred position calculation method can be used preferentially.

That is, for example, in the case of the first embodiment of the present invention, the location calculation method set by the operator as the top priority among the location calculation methods suitable for the propagation environment of the target terminal 300 is selected. Accordingly, even when the operator's preferred policy is changed, the position calculation method cannot be selected according to the operator's selection except that the priority of the position calculation methods included in the POSMETHOD_list is not changed. However, in the above-described second embodiment of the present invention, as described above, the H-SLP 300 provides at least one location calculation method that can be supported by the current target terminal 302, so that the propagation environment of the target terminal 302 is provided. Even if this does not change, the location calculation method may be changed according to the operator's choice. Therefore, in this case, the operator can operate the location information system more efficiently.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. In particular, the embodiment of the present invention has been described mainly using a position calculation method using GPS or TDOA as an example, but it is a matter of course that other position calculation methods may be included.

In addition, the embodiment of the present invention assumes the case of the Proxy mode and Non Roaming Case in the Network Initiated method where the location service requester (SUPL AGENT) is located in the network and the location service is provided by the target terminal according to the request for providing the location service from the network. As described above, the present invention may be applied to the Set Initiated method in which the location service is provided through the location server according to the location service request of the target terminal.

In addition, in the present invention, the location server is indicated by the H-SLP because it has been described on the assumption of a non-roaming case, but the present invention provides the location service using a location calculation method determined by the location server and the target terminal even in the case of the Roaming Case. Since they are similar to each other, the present invention can be applied as much as possible. In this case, the location server may be represented as V-SLP (Visited-SLP).

In addition, since the present invention has been described in the assumption of the proxy mode, the location server is indicated by the location server as H-SLP. However, even when the present invention uses the non proxy mode, the location service is determined by a location calculation method between the location server and the target terminal. Providing is similar to each other, so that the present invention can be applied to any number of course. In this case, the location server may be represented as a home-SUPL location center (H-SLC). Therefore, the scope of the invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

Therefore, the present invention can continue to provide conditional repetitive location information providing service even when the target terminal moves to another place during the conditional repetitive location information providing service and thus cannot use the predetermined location calculation method. By doing so, a more reliable conditional repeating location information providing service can be provided.

Claims (34)

In the location information providing system for providing a conditional repeating location information providing service, From the target terminal of the conditional repeating location information providing service, the target terminal receives information about the position calculation methods that can be supported, sets the priority of the position calculation methods and transmits to the target terminal, the target A location server that uses the location calculation method to provide location services according to the conditional repetitive location information providing service when information on a specific location calculation method is received from the terminal; In response to the request of the location server, transmit information on supportable location calculation methods, receive and store priority information on the location calculation methods from the location server, and provide the conditional repetitive location information. If the condition according to the service is satisfied, select one of the location calculation methods suitable for the current propagation environment in order of the priority, and transmit information on the selected location calculation method to the location server, the location calculation And a target terminal using a method for providing a location service according to the conditional repeating location information providing service. The method of claim 1, wherein the location server, A location server memory unit for storing information on location calculation methods received from the target terminal and priority setting condition information for setting priority of the location calculation methods; A priority setting unit configured to set priority for each of the location calculation methods by comparing the location calculation methods received from the target terminal with the priority setting condition information;  Location server message for generating various messages transmitted to the requestor of the conditional repeating location information providing service and the target terminal, including a conditional repeating location information providing service start message including the priority position calculation method information. A generation unit, When the information on the location calculation methods is received from the target terminal, at least one or more of the received location calculation methods are selected and the priority for each location calculation method is set through the priority setting unit. And generating and transmitting the conditional repetitive location information providing service start message including the same to the target terminal, and receiving information on a current specific location calculation method from the target terminal, using the location calculation method. A location service providing system for providing a conditional repetitive location information providing service comprising a location server control unit for providing a location service according to the repeated repeating location information providing service. The method of claim 2, wherein the location server control unit, And at least one or more of the location calculation methods received according to one of the availability, the preference of the operator, and the policy of the operator. The method of claim 2, wherein the priority setting condition information, Location service providing system for providing a conditional repetitive location information providing service characterized in that the priority is set in advance for each of a plurality of location calculation methods according to the designer or operator or the user of the location server. The method of claim 2, wherein the location server control unit, When the information on the current specific location calculation method is received from the target terminal, the location of the target terminal is directly calculated using the location calculation method, or the location assistance information for the location calculation is provided to the target terminal. Location service providing system for providing a conditional repeating location information providing service characterized in that the terminal calculates its own location. The method of claim 2, wherein the priority setting unit, Providing conditional repetitive location information providing service, characterized in that for generating the POSMETOOD_list which is a list including information on the location calculation methods received from the target terminal and priority information corresponding to the location calculation methods, respectively System for providing location services. The method of claim 6, wherein the POSMETOOD_list is, Location service providing system for providing a conditional repetitive location information providing service characterized in that the list of information about the location calculation methods according to the priority. The method of claim 6 or 7, wherein the location server control unit, The POSMETHOD_list is included in the conditional repetitive location information providing service start message as priority information on the location calculation methods received from the target terminal. system. The method of claim 1, wherein the location server, Location service for providing conditional repetitive location information providing service characterized in that it is a Secure User Plane Location (H-SLP) Home Platform or Secure User Plane Location (V-SLP) Provide system. The method of claim 1, wherein the location server, Location service for providing conditional repetitive location information providing service characterized in that the Home-SLP [Home-SLP (Home-SLP) Location Platform] or H-SLC [Home-SLC (Home-SLC) Location Center] Provide system. The method of claim 1, wherein the target terminal, A terminal for storing location calculation information which is information on location calculation methods that the target terminal can support, information on a propagation environment required by each location calculation method, and priority information of respective location calculation methods received from the location server; Memory section, A location calculation method selection unit for selecting a location calculation method having the highest priority set by the location server among the location calculation methods available in the current propagation environment; A terminal message generator for generating various messages for transmission to the location server, including a location information report message including information on a location calculation method according to selection of the location calculation method selection unit; In response to the request of the location server, transmit information on location calculation methods that can be supported by the location server, receive and store priority information of each location calculation information from the location server, and provide the conditional repetitive location information. Providing the location server with information on the location calculation method selected through the location calculation method selection unit and priority information on the location calculation method according to whether a condition according to a service is satisfied, and using the location calculation method And a terminal controller for providing a location service according to the repeated location information providing service. The method of claim 11, wherein the position calculation method selection unit, A location calculation environment detector for checking whether the location calculation method selected according to the priority is usable in the current propagation environment, wherein the currently selected location calculation method is used according to the radio wave environment detection result through the location calculation environment detection unit; A location service providing system for providing a conditional repeating location information providing service, characterized in that it is determined whether or not possible. The method of claim 11, wherein the terminal control unit, After transmitting the selected location calculation method through the location calculation method selection unit to the location server, if location assistance information for location calculation is provided from the location server, using the selected location calculation method to calculate its current location Location service providing system for providing a conditional repeating location information providing service, characterized in that. According to claim 1, The conditional repetitive location information providing service, Location service providing system for providing a conditional repeating location information providing service characterized in that the request from the target terminal. The method of claim 1, wherein the condition according to the conditional repetitive location information providing service is: 12. A location service providing system for providing a conditional repeating location information providing service, characterized in that a period set for providing location service expires or whether a target terminal has arrived at a specific location. A method of providing conditional repetitive location information providing service in a location information providing system providing conditional repetitive location information providing service to a target terminal, An initial message transmission step of transmitting, by the location server, a location service request initial message to the target terminal; In response to the location service request initial message, the target terminal connects to the location server through a data network, and starts the conditional repetitive location information providing service including information on location calculation methods supported by the target terminal. Sending a start message to send a message to the location server; A priority setting step of setting, by the location server, the priority for each of the location calculation methods supported by the target terminal by receiving the conditional repetitive location start message; Transmitting, by the location server, a conditional repetitive location information providing service response message including the set priority to the target terminal; A condition satisfaction determination step of checking, by the target terminal, whether a condition according to the conditional repetitive location information providing service is satisfied; The target terminal selects one of the position calculation methods having the highest priority among the position calculation methods currently available in the propagation environment of the target terminal when the condition according to the conditional repeating location information providing service is satisfied. A selection information transmitting step of transmitting location selection method selection information according to the selected location calculation method to the location server; A location calculation step of calculating, by the target terminal and the location server, the location of the target terminal according to the selected location calculation method; And providing, by the location server, the calculated location of the target terminal to the conditional repeating location information providing service requester. . The method of claim 16, wherein the conditional repetitive location information providing service, Location service providing method for providing a conditional repeating location information providing service, characterized in that the request from the target terminal. The method of claim 17, The initial message transmission step, The target terminal is to send a location service request initial message to the location server, The start message transmission step, The target terminal connects to the location server through a data network, and sends a conditional repeated location information providing service start message including information on location calculation methods supported by the target terminal to the location server. , The providing step, And providing, by the location server, the calculated position of the target terminal to the target terminal. The method of claim 16 or 18, wherein the priority setting step, A location calculation method information extraction step of the location server extracting information on location calculation methods supported by the target terminal from the start message received from the target terminal; A priority setting condition information loading step of loading, by the location server, priority setting condition information previously stored in a memory unit of the location server; And a setting step of setting, by the location server, priorities of each of the extracted location calculation methods according to the priority setting condition information. . The method of claim 19, wherein the extracting the position calculation method information comprises: Conditional repetitive location further comprising the location server selecting at least one or more of the location calculation methods received according to one of availability, operator preference, and operator policy. How to provide location services to provide informational services. 19. The method of claim 16 or 18, wherein sending a response message comprises: An alignment step of the location server sorting the location calculation methods supported by the target terminal according to each priority; A list generating step of generating, by the location server, a POSMETHOD_list including the sorted location calculation methods and priority information for each location calculation method; And generating, by the location server, a response message including the POISMETHO_list in the conditional repeating location information providing service response message. The method of claim 16 or 18, wherein the step of selecting the position calculation method, A priority information extraction step of extracting, by the target terminal, information on respective position calculation methods and priority information on the position calculation methods from the conditional repeating location information providing service response message received from the location server; , A location calculation method selection step of selecting, by the target terminal, a location calculation method having the highest priority among the location calculation methods; A suitability determining step of determining, by the target terminal, whether the selected location calculation method is suitable for a current propagation environment; And conditional repetition location information transmitting, by the target terminal, location calculation method selection information for transmitting location calculation method selection information according to a location calculation method currently selected according to the suitability determination result to the location server. How to provide location services to provide services. The method of claim 22, wherein the step of transmitting the position calculation method selection information, If the target terminal determines that the selected location calculation method is not suitable for the current propagation environment, the target terminal selects a location calculation method having a higher priority next to the currently selected location calculation method, and the currently selected location calculation method. And repeating the re-determining whether it is suitable for the current propagation environment. The method of claim 16 or 18, wherein the position calculation method selection information, Method for providing a conditional repetitive location information providing service characterized in that the priority information (PRIORITY_INDEX) of the currently selected location calculation method and the information about the currently selected location calculation method (POSMETHOD). The method according to claim 16 or 18, wherein the condition according to the conditional repetitive location information providing service is: 12. A method for providing location service for providing conditional repeating location information service, characterized in that whether a set period for providing location service expires or the target terminal has arrived at a specific location. 19. The method of claim 16 or 18, wherein the location server, Location service for providing conditional repetitive location information providing service characterized in that it is a Secure User Plane Location (H-SLP) Home Platform or Secure User Plane Location (V-SLP) How to Provide. 19. The method of claim 16 or 18, wherein the location server, Location service for providing conditional repetitive location information providing service characterized in that the Home-SLP [Home-SLP (Home-SLP) Location Platform] or H-SLC [Home-SLC (Home-SLC) Location Center] How to Provide. In the location information providing system for providing a conditional repeating location information providing service, From the target terminal of the conditional repetitive location information providing service, receives information about the location calculation methods that the target terminal can support, and transmits information on at least one location calculation method that can be supported therein to the target terminal. After receiving information on at least one available location calculation method from the target terminal, select one of the received location calculation methods and use it to provide location services according to the conditional repetitive location information providing service. Location server, In response to the request of the location server, transmit information about supportable location calculation methods, receive and store information from the location server in at least one location calculation method supported by the location server, and the condition When the condition according to the repeated repeating location information providing service is satisfied, the location calculation methods available for the current propagation environment are extracted from the information on the stored location calculation methods, and transmitted to the location server. And a target terminal for using the location calculation method selected by the method for providing location services according to the conditional repeating location information providing service. The system of claim 28, wherein the location server is: Location service for providing a conditional repetitive location information providing service, characterized in that for selecting any one of the location calculation method received from the target terminal in accordance with any one of the availability, preference of the operator, the operator's policy. Provide system. 30. The system of claim 29, wherein the location server is Conditionally characterized in that the target terminal calculates its own location by directly calculating the location of the target terminal using the selected location calculation method or by providing location assistance information for the location calculation to the target terminal. Location service providing system for providing a repeating location information providing service. The system of claim 28, wherein the location server is: Location service for providing conditional repetitive location information providing service characterized in that it is a Secure User Plane Location (H-SLP) Home Platform or Secure User Plane Location (V-SLP) Provide system. The system of claim 28, wherein the location server is: Location service for providing conditional repetitive location information providing service characterized in that the Home-SLP [Home-SLP (Home-SLP) Location Platform] or H-SLC [Home-SLC (Home-SLC) Location Center] Provide system. A method of providing conditional repetitive location information providing service in a location information providing system providing conditional repetitive location information providing service to a target terminal, An initial message transmission step of transmitting, by the location server, a location service request initial message to the target terminal; In response to the location service request initial message, the target terminal connects to the location server through a data network, and starts the conditional repetitive location information providing service including information on location calculation methods supported by the target terminal. Sending a start message to send a message to the location server; The location server receives the conditional repetitive location start message and includes conditional information on at least one or more location calculation methods provided by the location server among the location calculation methods supported by the target terminal. A response message transmitting step of transmitting a repeating location information providing service response message to the target terminal; A condition satisfaction determination step of checking, by the target terminal, whether a condition according to the conditional repetitive location information providing service is satisfied; If the target terminal, the condition according to the conditional repetitive location information providing service is satisfied, selects the position calculation methods available in the propagation environment of the current target terminal among at least one or more location calculation methods that the location server can provide A selection information transmission step of transmitting information on selected location calculation methods to the location server; A location calculation step of the location server selecting one of the location calculation method information received from the target terminal and calculating the location of the target terminal according to the selected location calculation method; And providing, by the location server, the calculated location of the target terminal to the conditional repeating location information providing service requester. . 34. The method of claim 33, wherein calculating the position A location calculation method selection step of the location server selecting one of the location calculation methods received from the target terminal according to one of availability, preference of a service provider, and a policy of a service provider; And a target terminal location calculation step of calculating a location of the target terminal according to the selected location calculation method.

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