RU2337498C2 - System of providing location service and method of location identification queries with delayed execution, using location deduced previously, in system providing location service - Google Patents

Abstract

FIELD: physics, communications.

SUBSTANCE: system includes home location platform (H-SLP) of secure user plane location (SUPL) protocol for transmission of message including previous position condition to target terminal (SET terminal) supporting SUPL protocol according to location service query from SUPL protocol agent; and target SET terminal for detection of position data saved earlier and meeting the condition of previous position in message, for defining position data by reiterated use of position data saved earlier if such data meeting the condition of previous position in message are present, and for providing position data to SUPL protocol agent.

EFFECT: improved efficiency of location.

29 cl, 8 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a system and method for providing a location service in general, and in particular, to a system and method for providing a location service that can provide a deferred location request service.

State of the art

With the increasing demand for various location-related location-based services, various location-based services using the location of the mobile terminal are provided, and development is being carried out to expand the location-related services. The expansion of location services will be the core of the fourth generation (4G) communications service.

Recently, as a location service, a delayed execution location request service or a triggered execution location request service is provided. A deferred location request service refers to a service for establishing predetermined criteria and repeatedly or periodically repeatedly calculating and providing a reliable location protocol agent via a user plane (SUPL protocol agent) with a notification about the occurrence of a corresponding event when evaluating the position of a SET terminal (terminal with SUPL protocol support) meet specified criteria.

A conventional method for providing deferred location request service information will be described with reference to FIG. 1, illustrating a method for providing deferred location request service information in accordance with the prior art. The SUPL agent 10 transmits a triggered location-based location alert request message (TLRR message) of the mobile location protocol (MLP), thereby requesting the provision of location request service from home SUPL location platform 20 (H-SLP platform) with deferred execution at step 102.

If the TLRR MLP message is received from the SUPL agent 10, the H-SLP 20 determines the routing information of the corresponding target SET 30 in step 104. Thus, the H-SLP 20 determines whether the target SET 30 is in roaming state and uses whether the protocol is SUPL.

If the target terminal SET 30 is not in roaming state and uses the SUPL protocol, i.e. the location service, the H-SLP 20 transmits the SUPL initialization message (INIT) to the target terminal 30 and starts the deferred location request service at step 106 The SUPL INIT message includes the SESSION_ID parameter, which is an identifier for identifying message exchanges between the H-SLP platform 20 and the target terminal SET 30, a positioning method (POS), which is Collec positioning, and the criteria used to determine whether the event occurred.

If a SUPL INIT message is received from the H-SLP platform 20, the target terminal 30 determines in step 108 whether the target terminal 30 is currently connected to the packet data network. If the target terminal SET 30 is not currently connected to the packet data network, the target SET 30 attempts to connect to the packet data network.

After making a network connection with the H-SLP platform 20, the target SET 30 transmits the SUPL POS INIT message to the H-SLP 20 in step 110. The SUPL POS INIT message includes the SESSION_ID parameter, which is an identifier for identifying message exchanges between the H platform -SLP 20 and a target terminal SET 30, a LOCATION_ID parameter representing network information including a target terminal 30, a NETWORK_ID parameter, a SYSTEM_ID parameter, and a SET_CAPABILITY parameter representing positioning capabilities.

If the SUPL POS INIT message is received from the target SET 30 terminal, the H-SLP 20 compares the SET_CAPABILITY parameter included in the SUPL POS INIT message with its own location measurement capabilities, thereby determining the positioning method (POS METHOD). Then, the H-SLP platform 20 and the target terminal SET 30 perform positioning in accordance with the determined positioning method in step 112.

After completing the positioning, the target terminal SET 30 compares its own position estimates with the criteria for the occurrence of the event included in the SUPL protocol INIT message, and determines whether an event that the SUPL protocol agent 10 requests has occurred. As a result of determining if an event occurred, the target terminal SET 30 reports the event to the H-SLP platform 20 using the SUPL protocol DEFERRED_REPORT message in step 114. The SUPL protocol DEFERRED_REPORT message includes the SESSION_ID parameter, the CLIENT_ID parameter, and the POS_ESTIMATE parameter, which are calculated evaluating the position of the target terminal SET 30.

If a SUPL DEFERRED_REPORT message is received from the target terminal SET 30, the H-SLP 20 home platform reports the event to the SUPL agent 10 using the MLP TLR message in step 116. The MLP TLR message includes the REQ_ID parameter to identify the definition request service delayed execution locations and a TLR_POS parameter representing calculated position estimates of the target terminal SET 30.

After reporting the occurrence of the event, if the service of the location request with delayed execution is provided, the target terminal SET 30 transmits the DEFERRED START message of the SUPL protocol for subsequent positioning to the H-SLP 20 platform using the event occurrence criteria included in the SUPL protocol INIT message, thereby requesting start of a new positioning procedure at step 117.

If a SUPL DEFERRED START message is received from the target terminal SET 30, the H-SLP 20 performs the following positioning procedure for the target terminal 30 at step 118. The target terminal 30 compares its own position estimates with the event criteria included in the SUPL protocol INIT , and determines whether the event that the SUPL protocol agent 10 requested has occurred.

If an event occurs, the target terminal SET 30 reports the occurrence of the event to the H-SLP platform 20 using the SUPL DEFERRED_REPORT message at step 120. If the DEFERRED_REPORT SUPL message is received from the target terminal 30, the H-SLP 20 reports the event to the agent 10 SUPL protocol using the MLR protocol TLR message at step 122. Then, the target terminal SET 30 and the H-SLP platform 20 repeat steps 117, 118, 120, and 122 until a predetermined end time is reached. If the predetermined end time is reached, the deferred location service request information service is completed.

The traditional method for providing delayed execution location request service information, as described above, repeats a series of steps in which: first, a position estimate of a SET terminal is calculated; comparing the calculated position estimates with the relevant criteria; and determining whether an event that the SUPL protocol agent is requesting has occurred and the determination results are reported.

In the traditional method, as described above, since the necessary estimates of the position of the SET terminal must be recalculated whenever the occurrence or non-occurrence of the event is determined, the whole process is complicated due to re-positioning. Also, the traditional method is inefficient, since the calculated position estimates of the SET terminal or the auxiliary data for calculating the position estimate are used only once to determine whether the corresponding event occurred, even when they can be reused to determine whether the subsequent event has occurred.

SUMMARY OF THE INVENTION

Thus, the present invention has been made to solve the above problems in the prior art, and it is an object of the present invention to provide a system and method for providing a location service that can provide a deferred location request service by reusing previously calculated position estimates or position auxiliary data even without a new calculation of the necessary position estimates or auxiliary data for SET terminal position whenever an occurrence or non-occurrence of an event is determined.

Another object of the present invention is to provide a location service providing system and a method for providing a deferred location request service that can provide a location service for determining a location until the time the request for the location service starts using the previously calculated position estimates or auxiliary data position.

In order to accomplish the aforementioned task, in accordance with one aspect of the present invention, there is provided a system for providing a location service, the system includes an H-SLP platform for transmitting an INIT SUPL message including at least one of a plurality of previous position estimates and previous ancillary data to a target SET terminal in accordance with a location service request from a SUPL protocol agent; and a target SET terminal for determining whether to reuse or not to reuse as at least one of the elements of the set consisting of previous position estimates and previous auxiliary data included in the SUPL protocol INIT message, and at least one from elements of a set consisting of previous position estimates and previous auxiliary data stored previously if the SUPL INIT message is received, and to provide the SUPL protocol agent with position information by reusing Nia one element of the set consisting of previous or previous position estimates of the auxiliary data included in the message INIT SUPL protocol, and the previously stored previous position estimates or previous sub data which can be reused.

In order to accomplish the aforementioned task, in accordance with another aspect of the present invention, there is provided a method for providing a deferred location request service by using previous position estimates or position auxiliary data in a position service providing system, the method includes transmitting via a platform H-SLP INIT SUPL protocol message, including at least one of the elements of the set consisting of previous estimates for position and previous ancillary data to the target SET terminal in accordance with the request for the location service from the SUPL protocol agent; and determining with the target terminal SET whether to reuse or not reuse at least one of the elements of the set consisting of previous position estimates and previous auxiliary data included in the INIT SUPL protocol message, and at least , one of the elements of the set consisting of previous position estimates and previous auxiliary data stored earlier, and provide the position information to the agent of the SUPL protocol using the target terminal SET by repeatedly using zovaniya one element of the set consisting of previous or previous position estimates of the auxiliary data included in the message INIT SUPL protocol, and the previously stored previous position estimates or previous sub data which can be reused.

In order to accomplish the above task, in accordance with another aspect of the present invention, there is provided a system for providing a location service, the system includes an H-SLP platform for transmitting a SUPIT INIT message in accordance with a location service request from a SUPL agent, an INIT message SUPL protocol includes at least one of the elements of the set consisting of previous position estimates and auxiliary position data of the target SET, accuracy data is determined Nia position (QoP) of previous positions or auxiliary data position estimates, which requests a SUPL protocol agent, and criteria for at least one element of the set consisting of previous estimates position and auxiliary data items; and a target SET terminal for providing the SUPL agent with the SUPL INIT message, previous position estimates or position assist data that satisfy position accuracy (QoP), and criteria included in the SUPL INIT message from previous position estimates or previously stored position auxiliary data and previous position estimates or position auxiliary data included in the SUPL protocol INIT message.

In order to accomplish the aforementioned task, according to yet another aspect of the present invention, there is provided a method by which a target SET terminal provides a deferred location request service by using pre-calculated position estimates in a location service providing system, the method includes the steps of: SUPL protocol INIT message including at least one of the elements of the set consisting of previous position estimates and position auxiliary data of the target SET, position accuracy data (QoP) of previous position estimates or position auxiliary data requested by the SUPL agent, and criteria for selecting at least one of the elements of the set consisting of previous position estimates and Ancillary position data and selecting at least one of the elements of a set consisting of previous position estimates and position auxiliary data that satisfies position accuracy (QoP) and criteria from previous position estimates or position auxiliary data included in the SUPL protocol INIT message, and Several previous position estimates or position auxiliary data saved earlier and provide the SUPL protocol agent with selected previous position estimates or position auxiliary data.

Brief Description of the Drawings

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, including:

1 is a multi-stage diagram illustrating a method for providing a deferred location request service in accordance with the prior art;

2 is a block diagram illustrating an apparatus of a positioning service providing system in accordance with the present invention;

3 is a multi-stage diagram illustrating a method for providing a deferred location request service by using previously computed position estimates in a position service providing system in accordance with the present invention;

4 illustrates the operation of the target terminal SET in accordance with the present invention;

5 is a multi-stage diagram illustrating a method for providing a deferred location request service by using previously calculated position estimates in a position service providing system in accordance with the present invention;

6 is a diagram illustrating a structure of a parameter for requesting transmission of previous position estimates or auxiliary position data in accordance with the present invention;

7 is a diagram illustrating a condition structure of a previous position in the criteria for previous position evaluations or auxiliary position data in accordance with the present invention; and

8 is a flowchart illustrating an operation of a target SET terminal in accordance with the present invention.

Detailed Description of Preferred Embodiments

Hereinafter, preferred embodiments in accordance with the present invention will be described with reference to the accompanying drawings. It should be noted that similar components are denoted by the same reference numbers, even if they are illustrated in various drawings. In addition, in the following description, a detailed description of known functions and configurations included herein will be omitted when this may complicate the understanding of the subject matter of the present invention.

2 shows a location service providing system in accordance with the present invention. The location services providing system includes a user-friendly reliable location protocol (SUPL) agent 100, a SUPL home location platform (H-SLP) 200, a SET 300 terminal, and a mobile communications network 150.

The SUPL agent 100 corresponds to a service access indicator for accessing a SUPL supporting H-SLP 200 platform to request location determination of a target terminal 300. Such a SUPL protocol agent 100 may request a deferred location request service or a determination request service triggered locations. When making a request for a deferred location request service or a triggered location service request, the SUPL agent 100 sets the elements as to when the event occurs as criteria and passes the criteria to the H-SLP 200 platform. Next, requesting previous position estimates or position auxiliary data, SUPL protocol agent 100 inserts criteria or conditions for the corresponding previous position estimates or position auxiliary data into the request message and services.

The auxiliary position data refers to additional information through which the target terminal SET 300 calculates its own position estimates. For example, when the target terminal SET 300 calculates its own position estimates using a global positioning system (GPS), the auxiliary position data may correspond to the satellite orbital information of the global positioning system (GPS) applicable to the target terminal SET 300 to receive signals from the global positioning system ( GPS). Criteria or conditions for previous position estimates or auxiliary position data may correspond to at least one element from the set consisting of position determination accuracy (QoP) data of previous position estimates and auxiliary position data, a period of time for which previous position estimates or position auxiliary data was calculated using the time stamp of previous position estimates or position auxiliary data and the positioning method used to calculate the previous general position estimates or auxiliary position data.

The H-SLP 200 platform calculates position estimates or auxiliary position data of the SET terminal using the SUPL protocol in accordance with a request for a deferred location request service from the SUPL agent 100. If the SUPL agent 100 makes a deferred location request service request, the H-SLP 200 inserts a parameter representing the presence of the deferred location request service request into the SUPL INIT message and transmits the SUPL INIT message to the target SET 300 whereby notifying the target terminal SET 300 of the service to be initialized. If criteria for previous position evaluations or auxiliary position data are received from the SUPL agent 100, the H-SLP 200 transmits request criteria for the corresponding previous position evaluations or auxiliary position data to the target SET 300. If the criteria for previous position evaluations or auxiliary position data, sent from SUPL agent 100, are insufficient or require additional elements, the H-SLP 200 platform can add query criteria for previous position estimates or supporting data ozitsii and then pass the query criteria SET 300 to the target terminal.

For example, the SUPL agent 100 requested only previous position estimates, but the H-SLP 200 may request the target terminal 300 to provide previous position auxiliary data to calculate previous position estimates. This is because the target terminal SET 300 may have previously calculated position auxiliary data instead of previous position estimates. If the target terminal SET 300 has previously calculated auxiliary position data, the H-SLP 200 may request the target terminal SET 300 to provide previously calculated auxiliary position data.

If the H-SLP 200 stores the previous position auxiliary data of the SET 300 target terminal, the H-SLP 200 can transmit the previous position auxiliary data to the SET 300 terminal. Then, the H-SLP 200 can calculate the location of the SET 300 terminal by itself or transmit the auxiliary data position, that is, information from the global positioning system (GPS) with auxiliary navigation (A-GPS) and orbital information from a satellite that is able to communicate with the H-SLP 200 platform, the SET 300 target terminal, by simply letting the target terminal SET 300 calculate its own location. In addition, the H-SLP 200 platform stores the calculated position estimates or auxiliary position data and allows previous position estimates or auxiliary position data to be reused in accordance with criteria or conditions, including position determination accuracy (QoP) data of previous position estimates or auxiliary data of the position of the target terminal SET 300 when the occurrence or non-occurrence of the event is determined.

The target terminal SET 300 is a SET terminal, a positioning object, uses the SUPL protocol and performs positioning by exchanging information necessary for position measurement with the H-SLP 200 platform using the SUPL protocol. In particular, the target terminal SET 300 stores the calculated position estimates or auxiliary position data and determines whether to use the newly saved position estimates or auxiliary position data again or not in accordance with criteria or conditions including position determination accuracy (QoP) data previous position estimates or auxiliary position data during subsequent positioning. The target terminal SET 300 compares position accuracy data (QoP) of previous position estimates or position auxiliary data with position accuracy data (QoP) required by a location service requester, for example, SUPL protocol agent 100, or position accuracy data the position (QoP) belonging to the H-SLP 200 platform or the target terminal SET 300, and determines whether to reuse or not reuse previous position estimates or auxiliary position data stored in currently in the target terminal SET 300.

The target terminal SET 300 may store several previous position estimates or auxiliary position data. In such a case, the target terminal SET 300 selects one of various previous position estimates or position auxiliary data in accordance with the criteria or conditions of previous position estimates or position auxiliary data sent from the requesting side of the location service, for example, from the agent 100 of the SUPL protocol or platform H -SLP 200. The criteria or conditions of previous position evaluations or auxiliary position data may correspond to at least one element of the set consisting of exactly ti determine the position (QoP), time stamp, time period and position method of multiple previous position estimates or position of the sub data previously stored in the target SET 300 terminal.

When the SET terminal has previous position auxiliary data instead of previous position estimates, and a transmission request of previous position auxiliary data is received, the SET terminal performs the same condition comparison as when the previous position estimates were requested and selects suitable previous position auxiliary data.

As a result of determining whether to reuse or not reuse previous position estimates or position auxiliary data previously stored in the destination SET 300 terminal, if previous position estimates or position auxiliary data can be reused, the H-SLP 200 platform or SET 300 target terminal determining whether an event has occurred using pre-calculated position estimates or auxiliary position data without calculating new position estimates or auxiliary position data.

The present invention, as described above, can also be applied to a positioning service to provide a position estimate when a particular event has occurred, as well as to a periodic positioning service to provide a position estimate periodically.

The H-SLP 200 platform or SET 300 target terminal recalculates the location of the SET 300 destination terminal when they cannot reuse previously calculated position estimates or position auxiliary data of the SET 300 destination terminal. The case of calculating the location of the target SET 300 terminal can be classified as a case, in which the H-SLP 200 platform calculates the location of the target terminal SET 300, that is, a method using a mobile station (MS), or the case in which the target terminal SET 300 calculates its own location, then there is a method based on a mobile station (MS).

When the H-SLP 200 platform calculates the location of the target SET 300, that is, in the case of a method using a mobile station (MS), the target SET 300 sends the network information necessary to calculate its own location to the H-SLP 200. The network information may include cell information in which the target terminal SET 300 is currently located, or information about a location area consisting of several cells. If the target terminal SET 300 supports the function of the global positioning system with auxiliary navigation (A-GPS), the target terminal SET 300 calculates the time difference between the moments of arrival of the signals (TDOA) during communication with an available satellite, and sends the TDOA platform H-SLP 200.

In the case in which the target terminal SET 300 directly calculates its own location, that is, in the case of a method based on a mobile station (MS), the target terminal SET 300 receives the orbital information of the satellite, currently having the ability to interact with the target terminal SET 300, from H-SLP 200 platform calculates TDOA and then independently calculates its own position estimates or position auxiliary data. If the location measurement is completed, the target terminal SET 300 compares the event criteria received from the H-SLP 200 platform with the calculated position estimates or auxiliary position data, thereby determining whether an event has occurred. If an event occurs, the target terminal SET 300 reports the event to the H-SLP 200 platform.

Mobile communication network 150 accesses a communication network for wireless transmission / reception between the H-SLP 200 platform and SET 300, which may consist of a global mobile communications system (GSM) network, a universal mobile telecommunications system (UMTS) network, etc. d. The mobile communication network 150 includes a core network 152, a wireless network controller (RNC) 154, and a node B 156. The core network 152 manages the information of the target terminals SET 300 and performs a mobility management function, a session management function, and a call management function. The wireless network controller (RNC) 154 transmits data from the H-SLP 200 platform, which is transmitted from the core network 152, to the target SET 300 via node B 156, and transmits data received from the target SET 300, to the H-SLP 200 platform. 156 transmits radio signals to the target SET 300 terminal and receives radio signals from the target SET 300 terminal.

According to the location service providing system based on the present invention, as described above, since previously calculated position estimates, position auxiliary data, or previous auxiliary data of the target terminal SET 300 can be reused, it is possible to eliminate an unnecessary positioning procedure and determined only once positioning procedure, whether the event occurred, which otherwise would have to be performed several times.

Next, a method for providing a deferred location request service using the pre-calculated position estimates or position auxiliary data of the target SET 300 in the location service providing system as described above will be described.

In the present invention, a case will be described in which the SUPL protocol agent 100 makes a request for a deferred location service request service or an initiated execution location service request service. In this case, the SUPL agent 100 presents certain criteria for using the previous position estimates or position auxiliary data to the H-SLP 200 platform, and the H-SLP 200 platform and the SET 300 target terminal use the previous position estimates or position auxiliary data. The target terminal SET 300 compares the previously stored position estimates or auxiliary position data with the criteria requested by the SUPL protocol agent 100. If the previously stored position estimates or auxiliary position data satisfy the criteria, the target terminal SET 300 reports the occurrence of the corresponding event to the SUPL protocol agent 100 (in the case of a service with an event-driven execution).

Unlike the case of a service with event-triggered execution, in the case of a service with periodically triggered execution for periodically providing a position estimate, the target terminal SET 300 periodically transmits the position estimates calculated using the previous position estimates or position auxiliary data to the SUPL protocol agent 100.

Also, in the present invention, a case with a network triggering of a location-based service with a triggered execution will be described, including a case with a network-triggering of a location-based service with an immediate execution. The case initiated by the terminal SET also uses the previous position estimates or auxiliary position data corresponding to the essence of the present invention. The SUPL protocol agent 100 provides criteria for previous position estimates or position auxiliary data, and the fact that the target terminal SET 300 selects previous position estimates or position auxiliary data matching the criteria can be applied to the immediate location service.

In the case of network triggering, the target SET 300 is located in the area controlled by the H-SLP 200, the H-SLP 200 calculates the location of the target SET 300 at the request of the SUPL agent 100 and transmits the calculated position estimates to the SUPL agent 100. However, the present invention can be applied to the case where the SET terminal initiates the transmission of position estimates or position auxiliary data of the target SET 300 to the target SET 300 in accordance with a request for a deferred location request service from the target SET 300. Also, the present invention will be described a case in which the target terminal SET 300 determines the occurrence or non-occurrence of an event. However, it goes without saying that the H-SLP 200 platform can also determine the occurrence or non-occurrence of an event.

FIG. 3 shows a method for providing a deferred location request service using previously calculated position estimates in a location service providing system in accordance with the present invention.

The SUPL agent 100 requests the H-SLP 200 to provide a deferred execution location request service or a triggered execution location request service using the mobile location protocol (MLP). An execution initiated location alert notification request message (TLRR message) of the MLP protocol is transmitted from the SUPL agent 100 to the H-SLP 200 platform.

The MLP TLRR message includes parameters such as MSID (Mobile Identity Identification), CLIENT_ID, START_TIME, STOP_TIME, TLRR_EVENT, previous data mode, previous search mode, and previous position condition. The MSID parameter is the unique identifier of the target terminal SET 300 (positioning object), the CLIENT_ID parameter is the unique identifier of the SUPL protocol agent 100, the START_TIME parameter represents the service start time, and the STOP_TIME parameter represents the service end time. The TLRR_EVENT parameter is a location alert request event and includes the TARGET_AREA and CHANGE_AREA_STATE parameters. The TARGET_AREA parameter represents the target area, and the CHANGE_AREA_STATE parameter represents the state of the SET terminal and includes the parameters ARRIVAL, LEAVING and STAY. The ARRIVAL parameter represents whether the SET 300 terminal has reached the target area, the LEAVING parameter represents whether the target SET 300 terminal leaves the target area, and the STAY parameter represents whether the target SET 300 terminal is in the target area. The previous data mode represents whether previous position estimates are requested or previous position auxiliary data is requested. This parameter may also be sent directly by the SUPL agent 100 or may be added when the H-SLP 200 sends the criteria that the SUPL agent 100 requested to the SET 300 destination terminal.

For example, when the SUPL agent 100 requested the H-SLP 200 to provide previous position estimates or position auxiliary data, the H-SLP 200 may send a message to request previous auxiliary data to the target SET 300. It is possible to indicate whether previous position estimates of the target are requested of the SET 300 terminal, or previous auxiliary data of the target SET 300 terminal is requested by the previous search mode. The reason for requesting previous position auxiliary data is because the H-SLP 200 can calculate position estimates or position auxiliary data using position auxiliary data received from the target SET 300 (for example, SET terminal mode using a global positioning system with auxiliary navigation (A-GPS)).

The previous search mode represents whether the agent 100 requests SUPL at least one of the elements of the set consisting of previous position estimates and auxiliary data of the target terminal SET 300, or requests at least one of the elements of the set consisting of current estimates the position and auxiliary data of the target terminal SET 300. Thus, the previous search mode represents whether the agent 100 SUPL requests only the previous position estimates of the target terminal SET 300, only the previous auxiliary position data of the target terminal SET 300 or both previous position estimates and auxiliary data of the target terminal SET 300.

The condition of the previous position represents the criteria or conditions for previous position evaluations or auxiliary data of the position. Criteria or conditions for previous position estimates or position auxiliary data may include position accuracy data (QoP), time stamp and time period of previous position estimates or position auxiliary data, a positioning method for calculating previous position estimates or auxiliary position data, and so on. .d.

Thus, the condition of the previous positioning is a condition used to select previous position estimates, position auxiliary data, or previous auxiliary data. As shown in FIG. 7, this condition includes a maximum positioning period 702, horizontal accuracy 704, vertical accuracy 706, delay 708, positioning method 710 (protocols, positioning method, etc. used to calculate position estimates or auxiliary position data between the SET terminal and the H-SLP platform, for example, a mode based on the SET terminal or a mode using the SET terminal, protocol examples: wireless resource locating service (RRLP) protocol, intermediate station Dart (IS) -801 (published by the Telecommunications Industry Association), etc.), time stamp 712 and the restriction 714 times. The time stamp 712 is the time at which previous position estimates, position auxiliary data, or previous auxiliary data are generated. The time limit or time period 714 is a period during which previous position estimates, position auxiliary data, or previous auxiliary data can be used.

Also, position accuracy data (QoP) represents the accuracy of previous position estimates, position auxiliary data, or previous auxiliary data. When the SUPL agent 100 requests previous position estimates or auxiliary position data with a previous position condition, the SUPL protocol agent 100 may present criteria or conditions, and the target terminal SET 300 selects previous position evaluations or auxiliary position data satisfying the relevant criteria or conditions from the stored previous position estimates or auxiliary position data and transfers the selected previous position estimates or auxiliary position data.

If the TLRR MLP message is received from the SUPL agent 100, the H-SLP 200 determines whether previous position estimates or position auxiliary data of the target SET 300 are stored, in step 304, as shown in FIG. 3. The H-SLP 200 platform identifies the target terminal SET 300 by the MSID included in the MLR TLRR message. If previous position estimates or auxiliary position data are saved, the H-SLP 200 platform compares the position accuracy level (QoP) requested by the SUPL agent 100 with a previous position condition including position accuracy accuracy (QoP) of previous position estimates or position auxiliary data, whereby determining whether previous position estimates or position auxiliary data can be reused. If previous position estimates or auxiliary position data can be reused, the H-SLP 200 transmits the previous position estimates or auxiliary position data to the target SET 300.

In addition, if previous position estimates or auxiliary position data are stored, it goes without saying that the H-SLP 200 can also directly transmit previous position estimates or auxiliary position data to the target SET 300 without checking the condition using the condition of the previous position.

At step 306, the H-SLP 200 configures the routing information of the target SET 300. Thus, the H-SLP 200 determines whether the target SET 300 is in a roaming state, uses the SUPL protocol, and then adjusts the routing information based on the determination . The present invention assumes that the target SET 300 is not in a roaming state and can perform positioning using the SUPL protocol.

After setting up the routing information, the H-SLP 200 transmits a SUPL INIT message to the target SET 300, whereby starting the deferred location request service at step 308. When the H-SLP 200 has previous position estimates or position auxiliary data and can to reuse previous position estimates or auxiliary position data, the H-SLP 200 inserts the previous position estimates or auxiliary position data in the INIT SUPL protocol message. The H-SLP 200 may also transmit previous position estimates or position auxiliary data to the target SET 300 without the process of determining whether to reuse or not reuse previous position estimates or position auxiliary data using criteria. In addition, when there is a condition of the previous position, including positioning accuracy (QoP) data requested by the SUPL agent 100, the H-SLP 200 may also insert positioning accuracy (QoP) data in the SUPL INIT message and transmit the INIT SUPL protocol message.

The SUPL protocol INIT message includes the SESSION_ID, SLP-MODE, POS METHOD, CRITERIA parameters, a previous data mode in which the SERVICE_TYPE parameter is received from the SUPL protocol agent 100, the previous search mode, and the conditions of the previous position. When there are previous position estimates or auxiliary position data, the SUPL INIT message includes previous position estimates or auxiliary position data. When there is position accuracy information (QoP) requested by the SUPL agent 100, the SUPL INIT message includes position accuracy information (QoP).

The SESSION_ID parameter is an identifier for identifying message exchanges between the H-SLP 200 platform and the SET 300 target terminal, and the SLP-MODE parameter represents whether the H-SLP 200 platform is divided into a positioning server and a message management server. When the positioning server is integrated with the message management server, SLP-MODE can be indicated by the parameter PROXY_MODE. When the positioning server is separated from the message management server, SLP-MODE can be indicated by the NON_PROXY_MODE parameter. The POS METHOD parameter is a positioning method used when the H-SLP 200 and the target terminal SET 300 calculate the position. For example, in a Global System for Mobile Communications (GSM) network, a Wireless Resource Location Service (RRLP) protocol may be used. In a code division multiple access (WCDMA) broadband access network, the Wireless Resource Management Protocol (RRC) can be used. In the IS-801 standard code division multiple access network, the SERVICE_TYPE parameter can be used (request service with immediate execution or request service with deferred execution), etc.

The criteria that are transmitted from the H-SLP 200 platform to the target SET 300 terminal are criteria for determining whether an event has occurred. Criteria may include parameters such as TLRR_EVENT, INTERVAL, STOP_TIME and START_TIME. The TLRR_EVENT parameter may include the TARGET_AREA and CHANGE_AREA_STATE parameters. The TARGET_AREA parameter represents the target area, and the CHANGE_AREA_STATE parameter represents the status of the SET terminal. The INTERVAL parameter represents the period of the positioning procedure between the H-SLP 200 platform and the SET 300 terminal. The START_TIME parameter represents the start time of the service, and the STOP_TIME parameter represents the end time of the service.

If a SUPL INIT message is received from the H-SLP 200 platform, the target SET 300 checks the previous position estimates or auxiliary position data at step 310. Previous position estimates or the auxiliary position data can be received by the SET 300 from the H-SLP 200 through the SUPL INIT message or may correspond to previous position estimates or position auxiliary data previously stored in the target terminal SET 300. Accordingly, the target terminal SET 300 determines whether previous estimates of The position, auxiliary position data, or previous auxiliary data in the received SUPL INIT message, and determines whether there are previously saved previous position estimates or position auxiliary data in the target terminal SET 300.

At step 312, the target terminal SET 300 determines whether to reuse or not reuse previous position estimates or position auxiliary data. Thus, if there are previously calculated previous position estimates or auxiliary position data, the target terminal SET 300 selects the previous position estimates or auxiliary position data satisfying the criteria (for example, position determination accuracy (QoP) data requested by the SUPL protocol agent 100), presented from the H-SLP 200 platform or SUPL agent 100, from previous position estimates or position auxiliary data stored in the destination terminal SET 300 with reference to the conditions of the previous position, including the positioning accuracy (QoP) data requested by the SUPL protocol agent 100.

Now that the target SET 300 terminal at the same time has both previous position estimates or position auxiliary data received from the H-SLP 200 platform and previous position estimates or position auxiliary data stored in it, the SET 300 terminal selects position estimates or auxiliary position data that satisfy the criteria presented, that is, the condition of the previous position, based on at least one of the elements of the set consisting of position determination accuracy (QoP), time stamps and, time and speed limits of the corresponding position estimates or auxiliary position data. Then, the target terminal SET 300 determines whether to reuse or not reuse the selected position estimates or position auxiliary data. At step 314, the target terminal SET 300 attempts to connect to the data network. Thus, the target terminal SET 300 determines whether the target terminal SET 300 is connected to the packet data network. If the target SET 300 is not connected to the packet data network, the target SET 300 attempts to connect to the packet data network. The destination SET 300 determines the PROXY_MODE or NON_PROXY_MODE mode with reference to the SLP_MODE 62 parameter included in the received SUPL INIT message. In the PROXY_MODE mode, the target SET 300 terminal connects to the H-SLP 200 platform via the Internet protocol.

After the connection is made, the target terminal SET 300 determines the occurrence of the event by using previous position estimates or position auxiliary data when reuse of previous position estimates or position auxiliary data is permitted as a result of determining whether to reuse or not reuse previous position estimates or position auxiliary data. However, when reuse of previous position estimates or position auxiliary data is not permitted, the target terminal SET 300 calculates new position estimates or position auxiliary data and determines the occurrence of the event. In the present invention, a predetermined service is provided in accordance with the results obtained by determining whether an event has occurred using position estimates or auxiliary position data of the SET terminal. However, in the case of a periodic location service, a determination of whether previous position estimates, position auxiliary data or previous auxiliary data satisfy a condition of a previous condition is made without determining whether an event has occurred, and values satisfying a condition of a previous condition are transmitted to the network.

In this case, a description will be given under the assumption that reuse of previous position estimates or position auxiliary data is permitted. When reuse of previous position estimates or position auxiliary data is permitted, steps 316 and 318 are skipped and step 320 is performed. Thus, the target terminal SET 300 determines whether an event has occurred. If an event occurs, the target terminal SET 300 reports the occurrence of the event to the H-SLP 200 platform. To report the occurrence of the event, the target terminal SET 300 transmits the DEFERRED_REPORT message of the SUPL protocol to the H-SLP 200 platform. The DEFERRED_REPORT message of the SUPL protocol includes the SESSION_ID, CLIENT_ID parameters and POS_ESTIMATE. The POS_ESTIMATE parameter represents position estimates or auxiliary position data of the target SET 300 and may include previous position estimates or auxiliary position data of the target SET 300.

If the SUPL DEFERRED_REPORT message is received from SET 300, the H-SLP 200 reports the occurrence of the event to the SUPL agent 100 using the MLP TLR message in step 322. The MLP TLR message includes the REQ_ID and TLR_POS parameters. The REQ_ID parameter is an identifier for identifying a deferred request service request, and the TLR_POS parameter represents previous position estimates or position auxiliary data of the target terminal SET 300.

However, when reuse of previous position estimates or position auxiliary data is not permitted, step 316 is performed. Thus, the target terminal SET 300 transmits the POS INIT SUPL protocol message to the H-SLP 200 platform. The POS INIT SUPL protocol message includes parameters such as SESSION_ID, LOCATION_ID, SET_CAPABILITY, etc. The SESSION_ID parameter is an identifier for identifying message exchanges between the H-SLP 200 platform and the SET 300 target terminal. The LOCATION_ID parameter is network information including the SET 300 terminal, cell information, NETWORK_ID identifier information, SYSTEM_ID identifier information, etc. d. The SET_CAPABILITY parameter represents which method should be used as the positioning method of the global positioning systems with auxiliary navigation using a mobile station (MS_ASSISTED A-GPS) and the global positioning system with auxiliary navigation based on a mobile station (MS-BASED A-GPS) and which protocol should be used as the positioning protocol of the set consisting of the protocol for the location service of a wireless communication resource (RRLP), a wireless control protocol Water Resources (RRC), and IS-801 standard.

If a SUPL POS INIT message is received from the target SET 300 terminal, the H-SLP 200 determines the positioning method to be used in the positioning procedure and calculates new position estimates or position auxiliary data of the target SET 300 using the determined positioning method in step 318 When the positioning method to be used in the positioning procedure performed by the SET 300 target terminal or the H-SLP 200 platform has been set, the step of determining the positioning method skipping, and the position of the target terminal SET 300 is calculated in accordance with the specified positioning method.

However, when no positioning method has been specified, the H-SLP 200 compares the SET_CAPABILITY parameter of the SET terminal included in the SUPL POS INIT message with its own positioning capabilities, determines the positioning method to be used in the positioning procedure, and then calculates new position estimates or auxiliary position data of the target terminal SET 300.

After the position of the target SET 300 terminal is re-computed, the target SET 300 determines whether an event has occurred, at step 320. If the event has occurred, the target SET 300 reports the occurrence of the event to the H-SLP 200 platform. To report the occurrence of the event, the target the SET 300 transmits a DEFERRED_REPORT SUPL message to the H-SLP 200 platform. A DEFERRED_REPORT SUPL message includes the SESSION_ID, CLIENT_ID, and POS_ESTIMATE parameters. The POS_ESTIMATE parameter represents position estimates or position auxiliary data of the target SET 300 and may include newly computed position estimates or position auxiliary data of the target SET 300.

If the SUPL DEFERRED_REPORT message is received from SET 300, the H-SLP 200 reports the occurrence of the event to the SUPL agent 100 using the MLP TLR message in step 322. The MLP TLR message includes the REQ_ID and TLR_POS parameters. The REQ_ID parameter is an identifier for identifying a deferred request service request, and TLR_POS is the newly computed position estimates or position auxiliary data of the target terminal SET 300.

After reporting the occurrence of an event in accordance with whether reuse of previous position estimates or position auxiliary data is permitted, as described above (first message), the H-SLP 200 platform and SET 300 target terminal determine whether to report a subsequent event. Since the target terminal SET 300 is aware of the event criteria that the SUPL agent 100 requested, the target terminal 300 may determine whether to report a subsequent event and may become aware of the order of each event message.

When it is necessary to report the occurrence of a subsequent event, the target terminal SET 300 proceeds to the step of reporting the occurrence of a subsequent event (second message) and checks the previous position estimates or auxiliary position data at step 324 before determining whether a subsequent event has occurred or not. At 326, the target terminal SET 300 determines whether to reuse or not use previous position estimates or position auxiliary data. Since steps 324 and 326 are similar to steps 310 and 312, see steps 310 and 312 for details.

As a result of the determination in step 326, when reuse of previous position estimates or position auxiliary data is allowed, the target terminal SET 300 determines whether or not a subsequent event has occurred, through previous position estimates or position auxiliary data. Otherwise, the target terminal SET 300 calculates new position estimates or auxiliary position data and determines whether a subsequent event has occurred or not.

When reuse of previous position estimates or position auxiliary data is allowed, steps 328 and 330 are skipped, and step 332 is performed. Thus, the target terminal SET 300 determines whether or not a subsequent event has occurred. However, if reuse of previous position estimates or position auxiliary data is not permitted, steps 328 and 330 are performed. Thus, the target terminal SET 300 calculates new position estimates or position auxiliary data and determines whether or not a subsequent event has occurred.

The target SET 300 and the H-SLP 200 determine when the deferred location request service currently in use is terminated with reference to the STOP_TIME and INTERVAL parameters, and repeat steps 324, 326, 328, 330, 332, and 334 to the time STOP_TIME at which the deferred location request service ends.

In the method in accordance with the present invention, when the target SET 300 terminal or the H-SLP 200 platform repeatedly determines whether an event has occurred or not, it is determined whether the pre-calculated position estimates or position auxiliary data of the target SET 300 can be reused. If the pre-calculated position estimates or auxiliary position data can be reused, the new positioning procedure is skipped and it is determined whether an event has occurred or not using pre-calculated position estimates or auxiliary position data. Therefore, in accordance with a method for providing a deferred location request service using previous position estimates or auxiliary position data based on the present invention, it is possible to eliminate an unnecessary positioning procedure and determine only through a one-time positioning procedure whether an event occurred, which otherwise should have been would have to be done several times.

The operation of the target terminal SET 300 to perform a method for providing a deferred location request service using previous position estimates or auxiliary position data in accordance with the present invention will be described in more detail with reference to FIG.

In step 402, the target SET 300 determines whether a SUPL INIT message has been received from the H-SLP 200 platform. The SUPL INIT message includes SESSION_ID, SLP-MODE, POS METHOD, CRITERIA, and SERVICE_TYPE. If there are previous position evaluations or auxiliary position data, the SUPL INIT message includes the previous position. If there is position accuracy (QoP) data requested by the SUPL agent 100, the SUPL INIT message may also include position accuracy (QoP) data.

If a SUPL INIT message is received, the target SET 300 checks the previous position estimates or auxiliary position data in step 404. Previous position estimates or position auxiliary data can be received by the SET 300 from the H-SLP 200 to the INIT SUPL message, or match previous position estimates or auxiliary position data previously stored in the target terminal SET 300. Accordingly, the target terminal SET 300 determines whether previous position estimates, auxiliary position data or previous auxiliary data into the received SUPL INIT message, and determines whether the previous position estimates, position auxiliary data, or previous auxiliary data are stored in the destination terminal SET 300.

If previous position estimates or position auxiliary data are available, the target terminal SET 300 determines whether previous position estimates, position auxiliary data or previous auxiliary data meet the relevant criteria, with reference to a previous position condition including position determination accuracy (QoP) data that the SUPL protocol agent 100 requested in step 406. When the SET terminal has several position estimates or position auxiliary data, or when the SET terminal has values greater than tr the estimated number of values, it is determined whether several position evaluations or position auxiliary data satisfy the condition of the previous position, that is, the criteria proposed by the SUPL protocol agent 100 or the H-SLP 200 platform. If some of the position evaluations or position auxiliary data satisfy the previous position condition SET 300 selects position estimates or position auxiliary data that meets the criteria and allows the reuse of selected position estimates or position auxiliary data tion. At step 410, the target terminal SET 300 determines whether an event has occurred or not, in accordance with the position estimates or auxiliary position data. If an event occurs, the target SET 300 reports an event.

Meanwhile, if previous position estimates, position auxiliary data or previous auxiliary data do not exist or if existing previous position estimates, position auxiliary data or previous auxiliary data do not satisfy the conditions of the previous position, the target terminal SET 300 performs a new positioning in step 412.

In this case, the target terminal SET 300 determines whether the positioning method is set, at step 412. If there is a predetermined positioning method, the target terminal SET 300 calculates new position estimates in accordance with the set positioning method at step 414. However, if the predetermined positioning method does not exist, the target terminal SET 300 determines a positioning method for calculating new position estimates in step 418 and calculates new position estimates in accordance with the newly determined positioning method in step 420. In step 4 16, the target terminal SET 300 determines whether an event has occurred or not, in accordance with the newly calculated position estimates or auxiliary position data of the SET terminal. If an event occurs, the target SET 300 reports an event.

FIGS. 3 and 4 relate to the method by which the H-SLP 200 platform informs the start of the position tracking service request to the target SET 300 and makes a request for future position estimates or auxiliary position data of the SET terminal (current position estimates or position auxiliary data) from the start of the request for a position tracking service.

The target terminal SET 300 determines whether to reuse or not reuse previous position estimates or auxiliary position data using criteria including position determination accuracy (QoP) data of previous position estimates or auxiliary position data, etc. When previous position estimates or auxiliary position data can be reused, the target terminal SET 300 regards the previous position estimates or auxiliary position data as current position estimates or auxiliary position data and transfers the previous position estimates or auxiliary position data to the H-SLP 200 platform. Platform H -SLP 200 allows previous position estimates or position auxiliary data transmitted from the target terminal SET 300 as current position estimates or auxiliary position data zitsii and then uses the received position estimates or auxiliary data items.

The present invention can be applied to a case in which, if a theft message is received requiring tracking of the stolen vehicle, the position of the target terminal SET 300 can be tracked from the point in time at which the theft message was received. However, since the present invention monitors the position from the point in time at which the theft message was received, it may not be possible to track the position until the theft message is received.

Accordingly, the present invention also makes it possible to perform position tracking up to the point in time at which the request for the position tracking service began. For example, as described below, if a theft message is received, it is possible to track the position until the theft message is received using position estimates or position auxiliary data.

To enable position tracking prior to the start time of the position tracking service request, the H-SLP 200 makes a request to the target terminal SET 300 to provide previous position estimates or position assistance data, indicating the start of the position tracking service request. The target terminal SET 300 stores previous position estimates or auxiliary position data for a predetermined period of time. If the H-SLP 200 platform requests position estimates or position auxiliary data prior to initiating a position tracking service request, the SET 300 transmits position estimates or position auxiliary data satisfying the position accuracy level (QoP) or the criteria requested by the H-SLP 200 platform Accordingly, the H-SLP 200 platform provides a position tracking service from the point in time that was before the start of the position tracking service request, using position estimates or supporting data zitsii transmitted from the target SET 300 terminal.

FIG. 5 will describe a method for using previous position estimates or position auxiliary data when an immediate location request service is provided. However, the present invention can be applied to a triggered location request service.

In step 502, the SUPL agent 100 transmits the immediate location request message SUPL (SLIR message) of the mobile positioning protocol (MLP) to the H-SLP 200 platform. The MLP SLIR message includes a parameter for requesting transmission of previous position estimates or auxiliary position data. 6 shows a parameter for requesting transmission of previous position estimates or auxiliary position data. The parameter includes a number 602 of previous positions, a fixed time 604, a duration 606, a flag 608, a previous position condition 610, a previous data mode 612, a previous search mode 614, and a previous position condition.

The number 602 of previous positions represents the number of required previous position estimates or auxiliary position data, and the fixed time 604 represents the time at which previous position estimates or auxiliary position data (or synchronization data) were calculated. Duration 606 is the time duration or order of previous position estimates or auxiliary position data, for example, first position estimates or auxiliary position data and second position estimates or auxiliary position data. Also, the duration 606 is information as to when the previous position estimates or position auxiliary data requested by the H-SLP 200 were determined. Flag 608 represents the presence or absence of required previous position evaluations or auxiliary position data. For example, when there are criteria for previous position evaluations or auxiliary position data, flag 608 may have a value of 0. Otherwise, flag 608 may have a value of 1.

The previous data mode represents whether previous position estimates are requested or auxiliary data is requested. This parameter may also be directly transmitted from the SUPL agent 100 or may be added when the H-SLP 200 transmits the criteria requested by the SUPL agent 100 to the target SET 300.

For example, when the SUPL agent 100 requests the H-SLP 200 to provide previous position estimates or position auxiliary data, the H-SLP 200 may send a message to request previous position estimates or position auxiliary data to the target SET 300. Whether previous auxiliary data is required of the SET terminal or previous position estimates or auxiliary position data of the SET terminal are required, it is possible to indicate using the previous data mode. The reason the H-SLP 200 requests the previous position auxiliary data is because the H-SLP 200 can calculate the previous position estimates of the target SET 300 using the previous auxiliary data received from the target SET 300 (for example, SET terminal using global positioning system with auxiliary navigation (A-GPS)).

The previous search mode represents whether the H-SLP 200 requests previous position estimates or previous position auxiliary data of the target terminal SET 300. This previous search mode can display the following four cases: 1. request previous position estimates; 2. request previous position auxiliary data; 3. request for either previous position estimates or previous position auxiliary data; and 4. Requesting both previous position estimates and previous position auxiliary data.

The current condition of the previous position represents the criteria for previous position evaluations or auxiliary position data. Criteria for previous position estimates or position auxiliary data include position accuracy data (QoP), time stamp and time period of previous position estimates or auxiliary position data, a positioning method by which previous position estimates or auxiliary position data were calculated, and etc.

Condition 610 of the previous position is the criteria for the required previous position evaluations or auxiliary position data. 7 shows a condition 610 of a previous position in the criteria for previous position estimates or auxiliary position data. The previous position condition 610 includes a maximum positioning period 702, horizontal accuracy 704, vertical accuracy 706, delay 708, positioning method 710 (protocols, positioning method, etc. used to calculate position estimates or auxiliary position data between the terminal SET and the H-SLP platform, for example, a mode based on a SET terminal or a mode using a SET terminal, protocol examples: wireless resource location service (RRLP) protocol, an intermediate standard t IS-801, etc.), label 712 and time limit 714 times. The time stamp 712 is the time at which previous position estimates, position auxiliary data, or previous auxiliary data are generated. The time limit or time period 714 is a period during which previous position estimates, position auxiliary data, or previous auxiliary data can be used.

The maximum positioning period 702 is the allowable period of previous position evaluations or auxiliary position data. The maximum statute of limitations for positioning is criteria indicating the period of time during which previous position evaluations or auxiliary position data must be valid starting from their fixed time. Horizontal accuracy 704 and vertical accuracy 706 represent the accuracy of previous position estimates or auxiliary position data and correspond to information indicating position determination accuracy (QoP) data. The accuracy of previous position estimates or auxiliary position data are criteria indicating how accurate previous position estimates or auxiliary position data are. Delay 708 is the delay of previous position estimates or position auxiliary data. The delay in previous position estimates or position auxiliary data is criteria indicating how long previous position estimates or position auxiliary data may be delayed, starting from their fixed time.

If an MLP protocol SLIR message is transmitted from the SUPL agent 100, including a parameter for requesting the transmission of previous position estimates or position auxiliary data, as described above, the H-SLP 200 determines the routing information of the target SET 300 at 504 in FIG. 5 . Thus, the H-SLP 200 platform determines whether the target SET 300 is in a roaming state and uses the SUPL protocol. As a result of the determination, the H-SLP 200 determines the routing information. The present invention assumes that the target SET 300 is not in roaming state and uses the SUPL protocol.

After the routing information is determined, the H-SLP 200 transmits a SUPL INIT message to the target SET 300, whereby enabling the direct execution of the location request service to be initiated at step 506. When the H-SLP 200 has previous position estimates or position auxiliary data and can reuse them, the H-SLP 200 inserts previous position estimates or position auxiliary data into the INIT SUPL protocol message and transmits the INIT SUPL protocol message. The H-SLP 200 also inserts a parameter to request the transmission of previous position estimates or position auxiliary data to the INIT SUPL protocol message and transmits the INIT SUPL protocol message. The transmission of previous position estimates or auxiliary position data has the structures shown in FIGS. 6 and 7.

If the SUPL INIT message is received from the H-SLP 200 platform, the target terminal SET 300 examines the previous position estimates or auxiliary position data in step 508. Here, the target SET 300 can receive the previous position estimates or auxiliary position data from the H-SLP 200 through The SUPL INIT message or may have previous position estimates or auxiliary position data. Accordingly, the target terminal SET 300 determines whether there are previous position estimates or auxiliary position data included in the received SUPIT INIT message, and determines whether there are previous position estimates or position auxiliary data stored in the SET 300 terminal.

If previous position estimates or position auxiliary data are available, the target terminal SET 300 selects position estimates or position auxiliary data satisfying the criteria and position accuracy data (QoP) of previous position estimates or position auxiliary data to be transmitted to the H-SLP 200 platform. from previous position estimates or position auxiliary data at step 510.

Thus, the target terminal SET 300 compares the position accuracy (QoP) data requested by the SUPL agent 100 with the position accuracy (QoP) data of previous position estimates or auxiliary position data. When the required position accuracy (QoP) is higher, the target terminal SET 300 selects the previous position estimate or auxiliary data of the desired position determination accuracy (QoP). The target terminal SET 300 also determines whether each of the previous position estimates or position auxiliary data meets the criteria of the previous position estimates or position auxiliary data requested by the H-SLP 200 platform. As a result of the determination, the SET 300 terminal selects the optimal previous position estimate or auxiliary data . For example, the target terminal SET 300 compares the fixed time of previous position estimates or auxiliary position data with the maximum age of positioning of previous position estimates or auxiliary position data requested by the H-SLP 200 and selects the most recently calculated previous position estimate or auxiliary data in within the maximum age limit for positioning. The destination terminal SET 300 compares the accuracy of previous position estimates or auxiliary position data stored therein with the accuracy of previous position estimates or auxiliary position data requested by the H-SLP 200, and selects the most recent position estimate or auxiliary data having higher accuracy . In addition, the target terminal SET 300 compares information regarding how long the fixed time of the previous position estimates or auxiliary position data stored therein has been delayed from the current point in time with the degree of tolerance of the delay of the previous position estimates or auxiliary position data requested by the platform H-SLP 200, and selects the previous position estimate or auxiliary data having the least delay.

After selecting the previous position estimate or auxiliary data to be transmitted as described above, the target SET 300 attempts to connect to the data network in step 512. Thus, the target SET 300 determines whether the target SET 300 is connected to the transmission network packet data. If the target SET 300 is not connected to the packet data network, the target SET 300 attempts to connect to the data network. The destination terminal SET 300 determines the PROXY_MODE mode or the NON_PROXY_MODE mode with respect to the SLP_MODE parameter 62 included in the received SUPL INIT message. In the PROXY_MODE mode, the target SET 300 terminal connects to the H-SLP 200 platform via the Internet Protocol (IP).

After connecting, the target SET 300 transmits the SUPL REPORT message including previous position estimates to the H-SLP 200 in step 514. If the SUPL REPORT message is received from the target SET 300, the H-SLP 200 reports previous evaluations the position or auxiliary position data of the SUPL agent 100 using the SLP message of the MLP protocol in step 516.

Next, operation of the target terminal SET 300 will be described in more detail when the H-SLP 200 has requested previous position estimates or position auxiliary data, as described above. FIG. 8 shows the operation of the target terminal SET 300 in accordance with the present invention.

In step 802, the target SET 300 determines whether a SUPL INIT message has been received from the H-SLP 200 platform. The SUPL INIT message may include previous position estimates, position estimates of position auxiliary data, position auxiliary data, previous position estimates requiring auxiliary data, position evaluation of auxiliary position data, auxiliary position data or a request parameter for transmitting auxiliary position data. Also, the SUPL INIT message may include the number of previous position estimates or position auxiliary data and QoP data of previous position estimates or position auxiliary data to be transmitted. In addition, the INIT SUPL protocol message may include a maximum statute of limitations for the location of previous position estimates or auxiliary position data to be transmitted, horizontal accuracy and vertical accuracy of previous position estimates or auxiliary data, fixed time of previous position estimates or auxiliary data, delay in previous position estimates or supporting data, etc. The maximum limitation period for determining the location of previous position estimates or auxiliary position data is a criterion indicating the period of time during which previous position estimates or auxiliary position data must be valid, starting from their fixed time. Horizontal accuracy and vertical accuracy are criteria that indicate how accurate previous position estimates or auxiliary position data should be. Fixed time are criteria indicating the point in time at which position estimates, position estimates of position auxiliary data, or position auxiliary data were calculated. The delay in previous position estimates or position auxiliary data is criteria indicating how long previous position estimates or position auxiliary data may be delayed, starting from their fixed time. Also, the positioning method used by the SET terminal and the H-SLP platform to calculate position estimates or auxiliary position data, as illustrated in FIGS. 6 and 7, is used as criteria.

If a SUPL INIT message is received from the H-SLP 200 platform, the SET 300 determines whether the previous position estimates or position auxiliary data are included in the SUPL INIT message, at step 804. Here, the SET 300 can receive previous position estimates or auxiliary position data from the H-SLP 200 platform via the INIT SUPL protocol message or may have previous position estimates or auxiliary position data. Accordingly, the target terminal SET 300 determines whether there are previous position estimates or auxiliary position data included in the received SUPIT INIT message, and determines whether there are previous position estimates or position auxiliary data stored in the SET 300 terminal.

If no previous position estimates or position auxiliary data exist, the target terminal SET 300 sends a message informing the absence of previous position estimates or position auxiliary data to the H-SLP 200 at step 808. However, if there are previous position estimates or position auxiliary data, the target SET 300 determines whether there are more existing previous position evaluations or auxiliary position data than the number of previous position evaluations or auxiliary position data requested, n step 810. If so, the target SET 300 must select previous position estimates or position assistance data requested by the H-SLP 200 from the multiple previous position estimates or auxiliary data platform.

Accordingly, if the number of available previous position estimates or auxiliary position data is greater than the number of required previous position evaluations or position auxiliary data, the target terminal SET 300 selects previous position evaluations or auxiliary position data that satisfy the previous position condition including criteria and position accuracy data (QoP) of previous position estimates or auxiliary position data requested by the H-SLP 200 platform from previous evaluations the position or the auxiliary data stored in the target SET terminal 300 in step 812.

Here, the target terminal SET 300 compares the criteria and position accuracy data (QoP) of previous position estimates or auxiliary position data stored therein with a previous position condition including criteria of previous position estimates or position auxiliary data requested by platform H -SLP 200, as well as position accuracy data (QoP) of previous position estimates or position auxiliary data to be transmitted. As a result of the comparison, the target terminal SET 300 selects the optimal previous position estimate or auxiliary data.

For example, the target terminal SET 300 compares the fixed time of previous position estimates or auxiliary position data stored therein with the maximum age of location of previous position estimates or auxiliary position data requested by the H-SLP 200 and selects the most recently calculated previous estimate Positions or ancillary data within the maximum age limit for positioning. The target terminal SET 300 also compares the accuracy of previous position estimates or auxiliary position data stored therein with the accuracy of previous position estimates or auxiliary position data requested by the H-SLP 200, and selects a previous position estimate or auxiliary data having higher accuracy . In addition, the target terminal SET 300 compares information regarding how long a fixed time of previous position estimates or auxiliary position data stored therein has been delayed from the current point in time with a tolerance degree of delay of previous position estimates or auxiliary position data requested H-SLP 200 platform, and selects the previous position estimate or auxiliary data with the least delay.

After selecting the optimal previous position estimate or auxiliary data as described above, the target terminal SET 300 transmits the selected previous position estimate or auxiliary data to the H-SLP 200 in step 814. Therefore, the H-SLP 200 can provide a position tracking service prior to the start of the request position tracking services. For example, if a theft message has been received, the H-SLP 200 will initiate position tracking before the theft message has been received using position estimates or position auxiliary data prior to the theft message.

As described above, when previously calculated previous position estimates or position auxiliary data of a target SET terminal are available in a SET terminal or an H-SLP platform, a location request service is provided by reusing existing previous position estimates or position auxiliary data. Therefore, in accordance with the present invention, when a location request service is provided, it is possible to eliminate an unnecessary positioning procedure by using previous position estimates or auxiliary position data and obtain past position estimates.

Also in accordance with the present invention, it is possible to carry out a process for determining through a single one-time positioning procedure whether an event has occurred and messages about the occurrence of the event, which otherwise would have to be executed several times, so that the service of location requests with deferred execution could be effectively provided.

In addition, in accordance with the present invention, it is possible to provide a positioning service for a position prior to the point in time at which the request for positioning services began using previous position estimates or auxiliary position data. For example, if a theft message is received, it is possible to track the position before receiving the theft message using position estimates or position auxiliary data preceding the theft message.

Although preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will understand that various modifications, additions and substitutions are possible without departing from the scope and spirit of the invention, as disclosed in the accompanying claims, including the full scope of its equivalents.

Claims (31)

1. A location service providing system comprising a home location platform (H-SLP platform) of a reliable location protocol via a user plane (SUPL protocol) for transmitting a message including a previous position condition to a target terminal (SET terminal) with support a reliable location protocol via a user plane (SUPL protocol) in accordance with a request for a location service from a trusted location protocol agent positions through the user plane (SUPL protocol agent); and a target SET terminal for determining whether there is previously stored location information satisfying a condition of a previous position in a message, for determining position information by reusing previously stored location information when there is previously stored location information satisfying a condition of a previous position in a message, and to provide position information to a SUPL protocol agent. 2. The system according to claim 1, in which the target terminal SET performs a new positioning and provides a positioning service when there is no previously stored location information satisfying the condition of the previous position in the message. 3. The system according to claim 1, in which the H-SLP platform inserts the condition of the previous position of the location information included in the message, and transmits this message. 4. The system according to claim 3, in which the condition of the previous position is provided by one of the elements: the H-SLP platform or the SUPL protocol agent. 5. The system according to claim 1, in which the target terminal SET selects one of the conditions: the condition of the previous position of the location information included in the message, or the condition of the previous position of the previously stored location information, compares the selected condition of the previous position with the condition of the previous position belonging to the target to the SET terminal, and determines whether to reuse or not reuse location information. 6. The system according to claim 1, in which the target terminal SET compares position accuracy data (QoP) of the location information of the H-SLP platform with position accuracy information (QoP) of previously stored location information and selects location information having a high level of accuracy position determination (QoP) when the condition of the previous position is QoP. 7. The system according to claim 3, in which the target terminal SET selects one of the conditions: the condition of the previous position of the location information included in the message, or the condition of the previous position of the previously stored location information, compares the condition of the previous position of the selected location information with the condition of the previous position, inserted into the message by the H-SLP platform, and determines whether to reuse or not reuse location information. 8. The system according to claim 7, in which the target terminal SET compares the position accuracy information (QoP) of the location information of the H-SLP platform with the position accuracy information (QoP) of the previously stored location information and selects location information having a high level of accuracy position determination (QoP) when the condition of the previous position is QoP. 9. The system according to claim 3, in which the target terminal SET selects one of the conditions: the condition of the previous position of the location information included in the message, or the condition of the previous position of the previously stored location information, compares the condition of the previous position of the selected location information with the condition of the previous position, which the SUPL protocol agent requests and determines whether to reuse or not reuse location information. 10. The system according to claim 9, in which the target terminal SET compares the position accuracy information (QoP) of the location information of the H-SLP platform with the position accuracy information (QoP) of the previously stored location information and selects location information having a high level of accuracy position determination (QoP) when the condition of the previous position is QoP. 11. The system according to claim 1, in which the condition of the previous position is provided from the SUPL agent to the H-SLP platform by means of a message in connection with the location service request. 12. A method for providing a deferred location request service by using location information in a location service providing system, comprising transmitting a reliable location protocol via a home plane (SUPL protocol) using the home location platform (H-SLP platform) ) a message that includes the condition of the previous position in the target terminal (SET terminal) with support for the reliable location protocol positioning through a user plane (SUPL protocol) in accordance with a location service request from a reliable location protocol agent through a user plane (SUPL protocol agent); and determining with the target terminal SET whether the previously stored location information in the target terminal SET satisfies the condition of the previous position in the message; determining position information by reusing previously stored location information when previously stored location information satisfies said condition; and provide the SUPL protocol agent position information. 13. The method of claim 12, wherein the step of transmitting said message comprises determining, using the H-SLP platform, whether previously stored location information is available, and transmitting the message including the H-SLP including at least one of the following: a condition of a previous position of location information or previously stored location information. 14. The method of claim 12, wherein the determining step comprises the steps of selecting one of the conditions of the previous position using the target terminal SET: a condition of a previous position of location information included in said message, or a condition of a previous position of previously stored location information; and using the target terminal SET, the selected condition of the previous position is compared with the previous position condition belonging to the target terminal SET, and it is determined whether to reuse or not reuse location information. 15. The method according to 14, in which, at the stage of selection, the target terminal SET compares position accuracy data (QoP) of the location information included in said message with position accuracy information (QoP) of the location information previously stored in the target terminal SET, and selects location information having a high level of position accuracy (QoP) when the condition of the previous position is QoP. 16. The method of claim 13, wherein the determining step comprises the steps of selecting one of the conditions of a previous position using the target terminal SET: a condition of a previous position of location information included in said message, or a condition of a previous position of previously stored location information; and using the target terminal SET, compare the previous position condition of the selected previous location information with the previous position condition requested by the SUPL protocol agent and determine whether to reuse or not reuse the location information. 17. The method according to clause 16, in which at the stage of selection, the target terminal SET compares the position accuracy information (QoP) of the location information included in the above message with the position accuracy information (QoP) of the location information previously stored in the target terminal SET, and selects location information having a high level of position accuracy (QoP) when the condition of the previous position is QoP. 18. The method of claim 13, wherein the determining step comprises the steps of selecting one of the conditions of the previous position using the target terminal SET: a condition of a previous position of location information included in said message, or a condition of a previous position of previously stored location information; and using the target terminal SET, compare the previous position condition of the selected location information with the previous position condition belonging to the H-SLP platform and determine whether to reuse or not reuse location information. 19. The method of claim 18, wherein in the selection step, the target terminal SET compares position accuracy information (QoP) of location information included in said message with position accuracy information (QoP) of location information previously stored in the target terminal SET, and selects location information having a higher level of position accuracy (QoP) when the condition of the previous position is QoP. 20. The method according to item 12, further containing a stage in which the target terminal SET performs a new positioning and provides position information when there is no previously stored location information that satisfies the condition of the previous position in the message. 21. The method according to item 12, in which the condition of the previous position is provided from the SUPL agent to the H-SLP platform by means of a message in connection with the request for location services. 22. A system for providing a location service comprising a home location platform (H-SLP platform) of a reliable location protocol via a user plane (SUPL protocol) for transmitting an initiation message (INIT message) of a reliable location protocol via a user plane (SUPL protocol) in accordance with a request for a location service from a reliable location agent through a user plane (SUPL protocol agent), wherein SUPL INIT includes location information, position accuracy information (QoP) of location information requested by the SUPL agent, and criteria for location information, wherein the location information includes at least one of the following: a previous assessment Positions or previous position auxiliary data and a target terminal (SET terminal) with support for a reliable location protocol via the user plane (SUPL protocol) for providing the SUPL agent with location information that satisfies the positioning accuracy (QoP) and criteria included in the SUPL protocol INIT message from previously stored information location and location information included in the INIT SUPL protocol message. 23. The system of claim 22, wherein the criteria include criteria regarding the number of elements of location information, fixed time of location information, order of location information, maximum statute of limitations for determining location of location information, horizontal and vertical accuracy of location information, and location information delay. 24. The system according to item 23, in which the target terminal SET selects at least one of the elements of location information that satisfies at least one of the mentioned criteria. 25. The system according to item 22, in which the target terminal SET selects and provides synchronization data or auxiliary data instead of location information. 26. The system of claim 22, wherein the target SET selects either location information included in the SUPL INIT message or previously stored location information, compares the position accuracy (QoP) data of the selected location information with the required position accuracy data (QoP) and selects location information that satisfies the required position accuracy data (QoP). 27. The system according to item 23, in which the target terminal SET compares a fixed time previously stored location information with the maximum statute of limitations of the previous location information requested by the H-SLP platform, and selects the last calculated location information within the maximum statute of limitations of the location . 28. The system according to item 23, in which the target terminal SET compares the accuracy of previously stored location information with the accuracy of the previous location information requested by the H-SLP platform, and selects location information having higher accuracy. 29. The system according to item 23, in which the target terminal SET compares information regarding how long the fixed time of the location information has been delayed from the current point in time, with the degree of tolerance of the delay of the location information requested by the H-SLP platform, and selects location information having the least delay. Priorities: 10.10.2005 - pp. 1-10, 12-20, 22, 23. 01/19/2006 - pp. 11, 21, 24-29.

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