KR20090091409A - System, server and method for reducing position determination error of mobile communication terminal in gps shadow area - Google Patents

Abstract

A system, a server and a method for reducing position determination error of a mobile communication terminal in a GPS shadow area are provided to grasp a location of a mobile communication terminal through the first and second position determination. A position determination server(140) compares the first position determination result with the second position determination result. The position determination server selects a final position determination result having best accuracy. A location center(130) transmits a location inquiry request message to the position determination server. The location center receives the location inquiry request message to transmit the final position determination result. An LBS(Location Based Service) platform(150) transmits a location system request message to the location center. The LBS platform receives the final position determination result from the location center.

Description

System, Server and Method for Reducing Position Determination Error of Mobile Communication Terminal in GPS Shadow Area}

The present invention relates to a system, a server, and a method for reducing a positioning error of a mobile communication terminal in a GPS shadow area. In more detail, when the positioning server locates a mobile communication terminal supporting short-range wireless communication, the short-range wireless communication function of the first location and mobile communication terminal including at least one of network location, hybrid location, and GPS location is used. The present invention relates to a system, a server, and a method for locating a mobile communication terminal through a second positioning.

Location Based Service (LBS) is a service system that provides various services to service users based on the location information of a mobile communication terminal obtained through a mobile communication network or a global positioning system (GPS). When the mobile communication terminal is located outdoors, the location of the mobile communication terminal may be acquired by using a GPS-based positioning technology in which a positioning error range is small.

However, in a location where GPS signals are not received, such as underground or indoors, or in an area where skyscrapers are crowded, such as a location where GPS signals are weak, that is, in a GPS shaded area, GPS positioning may be impossible or a location error may be 100 m or more.

In this case, the position of the mobile communication terminal can be obtained using at least one of network positioning (TDOA method, AOA method, p-Cell method, etc.) and hybrid positioning (A-GPS method, etc.), but positioning error is higher than GPS positioning. There is a problem in that it does not provide a high quality location-based service to the service user to the user because a large range occurs.

On the other hand, in recent years, there is an increasing demand for a mobile communication terminal having a near field communication function including any one of an ultrasonic communication function, a Bluetooth communication function, an infrared communication function, and a Zigbee communication function. It is proposed.

In order to solve the above-mentioned problems, the present invention provides a first positioning and mobile communication terminal including at least one of network positioning, hybrid positioning and GPS positioning when positioning server locates a mobile communication terminal supporting near field communication. An object of the present invention is to provide a system, a server, and a method for locating a mobile communication terminal through a second location using a short range wireless communication function.

In order to achieve the above object, the present invention provides a system for locating a mobile communication terminal having a short range wireless communication function, the identification number of the mobile communication terminal, the serial number of the mobile communication terminal, the base station ID and In response to receiving a location inquiry request message including a complex location type field, a mobile session is established by establishing a traffic session with the mobile communication terminal and performing a first location including at least one of network location, hybrid location, and global positioning system (GPS) location. After requesting the terminal and receiving the first positioning result that is the result, the mobile communication terminal requests the second positioning using the short range wireless communication function through the traffic session and receives the second positioning result that is the result. And comparing the first and second positioning results and having the best accuracy among them. A location server for transmitting a location inquiry response message including the identification number, the complex location type field, and the last location result after selecting a last location result; A location center that receives the location service request message including the identification number and the complex location type field, sends the location inquiry request message to the location server, receives the location inquiry response message, and transmits the final location result; And a location based service (LBS) platform that transmits the location service request message to the location center upon receiving a location request message requesting location of the mobile communication terminal, and receives the final location result from the location center. It provides a system for reducing the positioning error of the mobile communication terminal in the GPS shadow area characterized in that.

In addition, according to another object of the present invention, in the server for positioning the location of the mobile communication terminal having a short-range wireless communication function, data transmission and reception with the location center and the mobile communication terminal via the mobile communication network A communication unit to perform; When receiving a location inquiry request message including a complex location type field through the communication unit, after establishing a traffic session with the mobile communication terminal by controlling the communication unit, one of network location, hybrid location and global positioning system (GPS) location Requesting the mobile communication terminal for a first location including the above, receiving a first location result that is the result thereof, and controlling the communication session to maintain the traffic session even after receiving the first location result, the traffic A location requesting unit requesting a second location using the short range wireless communication function to the mobile communication terminal through a session and receiving a second location result as a result thereof; And comparing the first positioning result with the second positioning result and selecting a final positioning result which is a positioning result having the best accuracy among them, and identifying the identification number of the mobile communication terminal, the composite positioning type field, and the It provides a server to reduce the positioning error of the mobile communication terminal in the GPS shadow area, characterized in that it comprises a positioning result comparison unit for transmitting a location inquiry response message including the final positioning results to the location center.

In addition, according to another object of the present invention, in a method for positioning the location of a mobile communication terminal having a short-range wireless communication function, (a) positioning to request the location of the mobile communication terminal in the LBS (Location Based Service) platform Receiving a request message; (b) transmitting, at the LBS platform, a location service request message including an identification number of the mobile communication terminal and a complex location type field to a location center; (c) transmitting, at the location center, a location inquiry request message including the identification number, the serial number of the mobile communication terminal, the base station ID, and the complex location type field to a location server; (d) a location server establishes a traffic session with the mobile communication terminal to request the mobile communication terminal for a first location including at least one of network location, hybrid location, and global positioning system (GPS) location; Receiving a first location result; (e) requesting the mobile communication terminal for a second location using the short range wireless communication function through the traffic session and receiving a second location result as a result; (f) comparing the first location result with the second location result and selecting a final location result having the best accuracy among them; (g) sending a location query response message including the identification number, the composite location type field and the last location result to the location center; And (h) transmitting, at the location center, the final positioning result included in the location inquiry response message to the LBS platform. do.

As described above, according to the present invention, the positioning server may include location information of a mobile communication terminal supporting short range wireless communication, wherein the location information of the first location and mobile communication terminal includes one or more of GPS positioning, network positioning, and hybrid positioning. Positioning error of the mobile communication terminal in the GPS shadow area is reduced because it is acquired through the second positioning using communication, and requests the first and second positioning to the mobile communication terminal through one traffic session and receives the positioning result. Since the positioning time can be reduced, the positioning failure rate is reduced.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram schematically showing the configuration of a system for reducing positioning error of a mobile communication terminal in a GPS shadow area according to an embodiment of the present invention.

The system 100 according to an embodiment of the present invention includes a positioning request terminal 112, a positioning terminal 114, a mobile communication network 120, a mobile positioning center (MPC) 130, and a positioning server 140. And a Location Based Service (LBS) platform 150.

The positioning request terminal 112 and the positioning terminal 114 are mobile communication terminals using a mobile communication service through the mobile communication network 120, and include a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, and a GSM. (Global System for Mobile) phone, Wideband CDMA (W-CDMA) phone, CDMA-2000 phone, Mobile Broadband System (MBS) phone, Digital Multimedia Broadcasting (DMB) phone, and WiBro phone.

In the present invention, the location request terminal 112 transmits a location request message to the LBS platform 150 for requesting the location of the location terminal 114.

Meanwhile, in the present invention, the positioning terminal 114 is a mobile communication terminal having a short range wireless communication function including any one of an ultrasonic communication function, a Bluetooth communication function, an infrared communication function, and a Zigbee communication function. Perform a second positioning using a short-range wireless communication function of the first positioning and mobile communication terminal including at least one of network positioning, hybrid positioning and GPS positioning at the request of the first positioning result and the second positioning result; The positioning result is provided to the positioning server 140.

In the present invention, the second positioning using the short range wireless communication function of the mobile communication terminal may include at least one of a Zigbee signal, a Bluetooth signal, an infrared signal, and an ultrasonic signal in at least one transmitter installed in a GPS (Global Positioning System) shadow area. When the communication signal is transmitted, the mobile communication terminal having the near field communication function, that is, the positioning terminal 114 measures the delay time of the near field communication signals received from the three transmitters, and triangulates its position. After the calculation, as a technique for transmitting this to the positioning server 140, the positioning error is smaller than the network positioning.

Meanwhile, the positioning terminal 114 may transmit a positioning request message (for example, finding my location, etc.) to the LBS platform 150 to request its own location.

The mobile communication network 120 provides a mobile communication service to the positioning requesting terminal 112 and the positioning terminal 114, and transmits and receives data between the positioning requesting terminal 112 and the positioning terminal 114 and the LBS platform 150. As a communication network that mediates data transmission and reception between the positioning terminal 114 and the positioning server 140, a CDMA 2000 network, a W-CDMA wideband code division multiple access (WDMA) network, an IS-95 network, and a GSM system (Global System) for Mobile communication) network, Wibro network and any one of the next generation mobile communication network to be implemented.

When the location center 130 receives a location service request message (Location Request message) including an identification number of the location terminal 114 and a complex location type field from the LBS platform 150, the location number of the location terminal 114 is determined. Sends a location inquiry request message (GPOSREQ message) including a serial number (ESN: Electronic Serial Number), a base station ID, and a complex location type field to the location server 140, and a location query response message (gposreq) from the location server 140; Message), and transmits the final positioning result included in the location inquiry response message to the LBS platform 150. Here, the complex location type field is a service function type (SVC_TYPE) field defined separately to obtain a location of a mobile communication terminal in a GPS shadow area according to an embodiment of the present invention. Request a first location and a second location, and receive the first location result and the second location result from the positioning terminal 114. On the other hand, the identification number of the positioning terminal includes any one of a Mobile Identification Number (MIN), Mobile Station International ISDN Number (MSISDN) and International Mobile Station Identity (IMSI).

The positioning server 140 is a server for determining the location of the mobile communication terminal, and includes any one of a position determining entity (PDE) and a SPL (SUPL Location Platform) server.

In the present invention, when the location server 140 receives the location inquiry request message including the complex location type field from the location center 130, the location server 140 establishes a traffic session with the location terminal 114 and sends a first session to the location terminal 114. After requesting the location and receiving the first location result for the request, the second terminal requests the location 114 to receive the second location result through the preset traffic session without ending the preset traffic session. do. Here, the positioning server 140 transmits a second positioning request message (eg, a U_POS_REQ message) to the positioning terminal 114 and requests the positioning terminal 114 to request a second positioning from the positioning terminal 114. Receive a second location response message (eg, a U_POS_RES message).

In the present invention, the second location response message includes a second location result (the location of the location terminal 114 and the longitude value) and a second location success, and the first location result is a GPS location result and an A-GPS location result. , P-Cell positioning results, Time Difference of Arrival (TDOA) positioning results, and Angle of Arrival (AOA) positioning results.

The positioning server 140 that receives the first positioning result and the second positioning result from the positioning terminal 114 compares the first positioning result and the second positioning result, and the final positioning result is the positioning result having the best accuracy among them. After selecting, the location inquiry response message including the identification number of the location terminal 114, the complex location type field, and the final location result is transmitted to the location center 130. Here, the positioning server 140 processes the authentication of the positioning terminal 114 by using the identification number of the positioning terminal 114 included in the location inquiry request message before requesting the positioning terminal 114 for the first positioning. It is preferable to confirm that the positioning terminal 114 is a normal subscriber by performing a.

The LBS platform 150 is a service server that provides a plurality of additional services based on the location of the mobile communication terminal. The LBS platform 150 interworks with the location center 130 and the positioning server 140 to search and inquire the location of the mobile communication terminal. Provides various additional services based on location.

In the present invention, when the LBS platform 150 receives a location request message for requesting the location of the locationd terminal from the location request terminal 112 or the locationd terminal 114, the location terminal 114 from the mobile communication network 120 By receiving the terminal information of the terminal to check whether the location 114 has a short-range wireless communication function.

If the location terminal 114 is a terminal having a short-range wireless communication function, the LBS platform 150 sends a location service request message including the identification number and the complex location type field of the location terminal 114 to the location center 130. After transmitting, after receiving the final location result from the location center 130, an additional service based on the last location result is provided to the location requesting terminal 112 or the location terminal 114.

2 is a block diagram schematically illustrating a configuration of a server for reducing a positioning error of a mobile communication terminal in a GPS shadow area according to an embodiment of the present invention.

The positioning server 140 according to the embodiment of the present invention includes an authentication processing unit 210, a positioning request unit 220, a positioning result comparison unit 230, and a communication unit 240.

The authentication processing unit 210 performs an authentication process of the positioning terminal 114 using the identification number of the positioning terminal 114 included in the location inquiry request message before requesting the positioning terminal 114 for the first positioning. do.

When the location requesting unit 220 receives a location inquiry request message including a complex location type field through the communication unit 240, the location requesting unit 220 controls the communication unit 240 to establish a traffic session with the location-providing terminal 114, and then the location-providing terminal. The communication unit 240 controls the communication unit 240 to maintain the preset traffic session even after requesting the first location from the 114 and receiving the first location result. Here, the complex location type field causes the location requesting unit 220 to request the first location and the second location from the location location terminal 114.

The positioning requesting unit 220 requests the positioning terminal 114 for the second positioning through a preset traffic session and transmits a second positioning response message including the second positioning result and the second positioning success via the communication unit 240. Receive. Here, the positioning request unit 220 transmits a second positioning request message to request the second positioning from the positioning terminal 114.

The positioning result comparison unit 230 compares the first positioning result and the second positioning result received by the positioning requesting unit 220, selects the last positioning result which is the positioning result having the best accuracy among them, and then selects the communication unit 240. The location inquiry response message including the identification number, the complex location type field, and the final location result of the location terminal 114 is transmitted to the location center 130 through the location center 130.

The communicator 240 transmits / receives data with the location center 130 and transmits / receives data with the positioning terminal 114 via the mobile communication network 120.

The communication unit 240 receives the location inquiry request message from the location center 130 and transmits it to the authentication processing unit 210, and establishes a traffic session with the positioning terminal 114 under the control of the location requesting unit 220. The requesting unit 220 requests the positioning terminal 114 to make a first location and receives a first location result thereof.

The communication unit 240 maintains the traffic session set by the control of the location requesting unit 220 even when the first location is terminated.

Meanwhile, the communication unit 240 transmits the location inquiry response message transmitted from the positioning result comparison unit 230 to the location center 130.

3 is a flowchart illustrating a process of reducing a positioning error of a mobile communication terminal in a GPS shadow area according to an embodiment of the present invention.

When the LBS platform 150 receives a location request message from the location requesting terminal 112 or the location location terminal 114, the mobile terminal 120 receives the terminal information of the location location terminal 114 from the mobile communication network 120. Check whether S has a near field communication function (S305 and S310).

If the location terminal 114 is a terminal having a short-range wireless communication function, the LBS platform 150 sends a location service request message including the identification number and the complex location type field of the location terminal 114 to the location center 130. It transmits (S315).

The location center 130 receiving the location request message (Location Request message) is a location inquiry request including the identification number, serial number (ESN: Electronic Serial Number), base station ID and the complex location type field of the location terminal 114; The message (GPOSREQ message) is transmitted to the positioning server 140 (S320).

The location server 140 receiving the location inquiry request message from the location center 130 performs an authentication process of the location terminal 114 to confirm that the location terminal 114 is a normal subscriber (S325).

Thereafter, the positioning server 140 sets up a traffic session with the positioning terminal 114, requests the positioning terminal 114 for the first positioning, and receives the first positioning result (S330 and S335).

The positioning server 140 sends a request for the second positioning to the positioning terminal 114, that is, the second positioning request message, to the positioning terminal 114 through the preset traffic session without ending the preset traffic session. Receive a second location response message for the (S340, S345). Here, the second location response message includes a second location result (above, longitude value of the location terminal 114) and whether the second location is successful.

The positioning server 140 compares the first positioning result and the second positioning result and selects the last positioning result which is the positioning result having the best accuracy among them, and then the identification number, the complex positioning type field and the last position of the positioning terminal 114. The location inquiry response message including the positioning result is transmitted to the location center 130 (S350 and S355). Here, the first positioning result includes at least one of a GPS positioning result, an A-GPS positioning result, a P-Cell positioning result, a TDOA (Time Difference of Arrival) positioning result, and an AOA (Angle of Arrival) positioning result.

The location center 130 receives the location inquiry response message from the positioning server 140, and transmits the final positioning result included in the location inquiry response message to the LBS platform 150 (S355 and S360).

In the embodiment of the present invention as described above, when positioning the positioning terminal 114, i.e., a mobile communication terminal having a short-range wireless communication function, the first positioning and the second positioning are performed in parallel, and the positioning has the best accuracy. Since the result is provided, when the mobile communication terminal is located in the GPS shadow area, it is possible to provide a short range wireless communication positioning result, which is a second positioning result having higher accuracy than the network based positioning result. Therefore, the positioning error of the mobile communication terminal can be smaller than before.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, the present invention is applied to the field of location-based services, the positioning server includes a first location including at least one of the GPS location, network location and hybrid location location information of the mobile communication terminal that supports short-range wireless communication and The positioning error of the mobile communication terminal is reduced in the GPS shadow area because the mobile terminal acquires the second positioning using the short range wireless communication of the mobile communication terminal, and the first and second positioning are performed to the mobile communication terminal through one traffic session. Since it can request and receive the positioning result, it is a very useful invention which produces the effect of shortening the positioning time and reducing the positioning failure rate.

1 is a block diagram schematically illustrating a configuration of a system for reducing a positioning error of a mobile communication terminal in a GPS shadow area according to an embodiment of the present invention;

2 is a block diagram schematically illustrating a configuration of a positioning server for reducing a positioning error of a mobile communication terminal in a GPS shadow area according to an embodiment of the present invention;

3 is a flowchart illustrating a process of reducing a positioning error of a mobile communication terminal in a GPS shadow area according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: mobile communication terminal 120: mobile communication network

130: location center 140: positioning server

150: LBS platform 210: authentication processing unit

220: positioning request unit 230: positioning result comparison unit

240: communication unit

Claims (13)

In the system for positioning the position of the mobile communication terminal having a near field communication function, Upon receiving a location inquiry request message including an identification number of the mobile communication terminal, a serial number of the mobile communication terminal, a base station ID, and a complex location type field, a traffic session is established with the mobile communication terminal to establish network location, hybrid location, and GPS. (Global Positioning System) After requesting a first location including at least one of the location to the mobile communication terminal and receiving a first location result that is a result of this, the short-range wireless communication to the mobile communication terminal through the traffic session Requesting a second location using a function and receiving a second location result that is the result thereof; comparing the first location result and the second location result; selecting the last location result having the best accuracy among the identification numbers; A location inquiry response message including the complex location type field and the last location result; Transmitting positioning server; A location center that receives the location service request message including the identification number and the complex location type field, sends the location inquiry request message to the location server, receives the location inquiry response message, and transmits the final location result; And A location based service (LBS) platform that transmits the location service request message to the location center when receiving a location request message for requesting the location of the mobile communication terminal and receives the final location result from the location center. System for reducing the positioning error of the mobile communication terminal in the GPS shadow area comprising a. The method of claim 1, A mobile communication network which transmits and receives data between the mobile communication terminal and the LBS platform and transmits and receives data between the mobile communication terminal and the positioning server. System for reducing the positioning error of the mobile communication terminal in the GPS shadow area comprising a. The method of claim 1, The complex location type field may allow the location server to request the first location and the second location from the mobile communication terminal and receive the first location result and the second location result. System for reducing the positioning error of the mobile communication terminal in the. The method of claim 1, The identification number is a system for reducing the positioning error of the mobile communication terminal in the GPS shadow area, characterized in that it comprises any one of Mobile Identification Number (MIN), Mobile Station International ISDN Number (MSISDN) and International Mobile Station Identity (IMSI) . The method of claim 1, The positioning server is a system for reducing the positioning error of the mobile communication terminal in the GPS shadow area, characterized in that it comprises any one of a Position Determining Entity (PDE) and SULP Location Platform (SLP) server. In the server for positioning the location of the mobile communication terminal having a near field communication function, A communication unit which transmits / receives data with a location center and transmits / receives data with the mobile communication terminal via a mobile communication network; When receiving a location inquiry request message including a complex location type field through the communication unit, after establishing a traffic session with the mobile communication terminal by controlling the communication unit, one of network location, hybrid location and global positioning system (GPS) location Requesting the mobile communication terminal for a first location including the above, receiving a first location result that is the result thereof, and controlling the communication session to maintain the traffic session even after receiving the first location result, the traffic A location requesting unit requesting a second location using the short range wireless communication function to the mobile communication terminal through a session and receiving a second location result as a result thereof; And After comparing the first positioning result and the second positioning result and selecting the last positioning result which is the positioning result having the best accuracy among them, the identification number of the mobile communication terminal, the complex positioning type field and the last through the communication unit. Positioning result comparison unit for transmitting a location inquiry response message including the positioning result to the location center Server for reducing the positioning error of the mobile communication terminal in the GPS shadow area comprising a. The method of claim 6, An authentication processor for performing authentication processing of the mobile communication terminal by using the identification number included in the location inquiry request message before requesting the mobile station to the first location. Server for reducing the positioning error of the mobile communication terminal in the GPS shadow area comprising a. The method of claim 6, The first positioning result includes at least one of a Global Positioning System (GPS) positioning result, an A-GPS positioning result, a P-Cell positioning result, a Time Difference of Arrival (TDOA) positioning result, and an Angle of Arrival (AOA) positioning result. Server for reducing the positioning error of the mobile communication terminal in the GPS shadow area, characterized in that. The method of claim 6, The location requesting unit transmits a second location request message to the mobile communication terminal through the traffic session and receives a second location response message including the second location result and the second location success message from the mobile communication terminal. Server for reducing the positioning error of the mobile communication terminal in the GPS shadow area. The method of claim 6, The hybrid location type field is a server for reducing the positioning error of the mobile communication terminal in the GPS shadow area, characterized in that the positioning request unit to the mobile communication terminal requesting the first location and the second location. In the method for positioning the position of the mobile communication terminal having a short-range wireless communication function, (a) receiving a location request message requesting location of the mobile communication terminal in a location based service (LBS) platform; (b) transmitting, at the LBS platform, a location service request message including an identification number of the mobile communication terminal and a complex location type field to a location center; (c) transmitting, at the location center, a location inquiry request message including the identification number, the serial number of the mobile communication terminal, the base station ID, and the complex location type field to a location server; (d) a location server establishes a traffic session with the mobile communication terminal and requests the mobile communication terminal for a first location including at least one of network location, hybrid location, and global positioning system (GPS) location; Receiving a first location result; (e) requesting the mobile communication terminal for a second location using the short range wireless communication function through the traffic session and receiving a second location result as a result; (f) comparing the first location result with the second location result and selecting a final location result having the best accuracy among them; (g) sending a location query response message including the identification number, the composite location type field and the last location result to the location center; And (h) transmitting, at the location center, the final positioning result included in the location inquiry response message to the LBS platform; Method for reducing the positioning error of the mobile communication terminal in the GPS shadow area comprising a. 12. The method of claim 11, wherein after step (c) (c1) performing authentication processing of the mobile communication terminal in the positioning server; Method for reducing the positioning error of the mobile communication terminal in the GPS shadow area, characterized in that it further comprises. The method of claim 11, The complex location type field may allow the location server to request the first location and the second location from the mobile communication terminal and receive the first location result and the second location result. How to reduce the positioning error of the mobile communication terminal in.

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