KR20100005339A - System and method for providing position information of portable terminal - Google Patents

Abstract

PURPOSE: A system and a method for providing position information of a portable terminal are provided to improve reliability by reducing an error range of a position based service according to the existing base station based method. CONSTITUTION: A portable terminal(100) includes an input unit, an output unit, a memory unit, a wireless communication unit, a controller, and a GPS receiver for receiving a GPS signal. The portable terminal generates the position information using the GPS information received from a GPS satellite(300) with a constant period unit. The generated position information is stored in an internal memory unit. The portable terminal matches the position information obtained from a base station(200) with the GPS position information. The portable terminal stores the matched information in the internal memory unit. The base station processes the general call and provides the cell identification information grasping the position of the portable terminal. The GPS satellite provides the GPS information grasping the position of the portable terminal.

Description

System and method for providing location information of mobile terminal {SYSTEM AND METHOD FOR PROVIDING POSITION INFORMATION OF PORTABLE TERMINAL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for providing location information of a mobile terminal, and in particular, a mobile terminal that provides a location based service (LBS) based on GPS and a base station in a mobile terminal having a GPS (Global Positioning System) function. The present invention relates to a position measuring system and method.

With the development of mobile communication technology, the rate of use of wireless Internet service using a mobile communication terminal continues to increase. The biggest feature of the wireless Internet is that it can utilize more personalized services according to the use of individual terminals, and can provide unique information based on the user's mobility. Location-based services (LBS), which are additional services based on them, are emerging.

These location-based services are based on mobile communication terminals such as cellular phones, PCS (Personal Communication Services), PDAs (Personal Digital Assistants), and notebook computers to accurately identify the location of people or objects and provide additional information related to the location. Collectively, the service and the system for it.

The main services of location-based services include: another person's location finder (friend finder) service that finds the other's location in relation to providing mutual location information, and traffic that searches the user's location and searches for traffic information around it Information services, vehicle emergency services that automatically detect the location of a broken car and send a tow truck, emergency services that service the location of the nearest emergency room to treat injuries from sudden accidents, and charges depending on where you use mobile communications equipment Location-based payment service that differs from the user's location, closest to the user's location or the location of the gas station, rest area, restaurants, etc. that fits your preferences, such as living information services, sale advertisements, etc. Advertising and Discount Coupons Push Service There are also numerous services such as leisure information and theft tracking.

On the other hand, the location-based service obtains the location information of the mobile communication terminal using the location measurement technology of the mobile communication terminal. Location tracking technologies for providing location-based services include base station-based technology using base station (BS) received signals and GPS-based technology using GPS receivers. There is a hybrid technique used.

First, the base station-based technology is a way to determine that the mobile communication terminal is located in the base station by using the cell identification information (Cell-ID) of the base station registered by the mobile communication terminal, the existing terminal can be used as it is, without additional costs, The location accuracy is not high depending on the cell size or processing method of the base station.

In addition, the GPS-based technology is a method of measuring the position of the mobile communication terminal using a signal transmitted from the GPS satellites built in the mobile communication terminal, there is an advantage that can measure a very accurate position, but the initial position measurement time This takes a long time and the position measurement is difficult when the signal cannot be received from the satellite due to indoors and buildings.

In addition, the technology for complementing the problems of the base station-based technology and the GPS-based technology is a hybrid technology, in which the mobile communication terminal receives a signal from a GPS satellite and measures its position, and the cell identification information of the base station registered by the mobile communication terminal. Since the location is measured simultaneously using (Cell-ID), reliability is greatly reduced by significantly reducing the error caused by the signal reflected from buildings in the urban area.

In the conventional hybrid method, since the mobile communication terminal is in the basement or indoors where GPS signals cannot be received in most cases, it is likely to be used as the location information of the mobile communication terminal by the base station based location information rather than the GPS based location information. Big.

That is, the conventional hybrid method measures the position based on GPS at the first priority when checking the position information of the mobile communication terminal, and if it fails, measures the position based on the base station at the second position and provides it as the position information of the mobile communication terminal. do. That is, when the mobile communication terminal is located in the shadow area, such as indoors, the location is measured by the base station based method which is second order.

Therefore, in the conventional hybrid method, since the location of the mobile communication terminal is mainly measured based on the base station, there is an inefficiency of not using a very accurate GPS-based method properly. In other words, if the mobile communication terminal is located in a shaded area such as a room, it is impossible to measure the location using GPS. Even though the base station based method and the GPS based method are used to measure the location of the mobile communication terminal, most of the base station based method is used. There is a problem that the position is measured and its accuracy is lowered.

An object of the present invention is to provide a system and method that can provide a location information service of a reliable mobile terminal through a hybrid method combining a base station-based method and a GPS-based method.

Another object of the present invention is to provide a system and method that can compensate for the problem that the location is measured in a base station-based manner when the location information is provided by a hybrid method, the accuracy thereof is poor.

It is still another object of the present invention to provide a system and method for providing a location information of a mobile terminal which can reduce its error distance during positioning according to the base station based method by combining the base station based method with the GPS based method.

Still another object of the present invention is a system and method for providing a service by any one of a GPS based method, a base station based method, and a hybrid method according to whether a GPS signal can be received when providing a location based service of a mobile terminal. In providing.

Still another object of the present invention is to provide a more accurate location-based service by the compensated location information by compensating the compensation value pre-calculated and stored using the GPS location information to the base station-based location information when providing the service by the base station-based method. It is to provide a system and method that can provide.

The method according to an embodiment of the present invention for achieving the above object, in the method for providing location information of a mobile terminal, storing the GPS location information and the base station location information obtained in the GPS (Global Positioning System) signal receiving section And calculating a compensation value using the stored GPS location information and the base station location information when entering the GPS signal reception shadow section, and performing the compensation location information applying the compensation value to the base station location information acquired in the shadow section. And obtaining a location-based service based on the reward location information.

An apparatus according to an embodiment of the present invention for achieving the above object, in the mobile terminal, by forming a communication channel with a wireless communication system to perform voice and data communication, from the base station of the area where the mobile terminal is located A wireless communication unit for receiving base station information, a GPS receiver for receiving GPS information from one or more Global Positioning System (GPS) satellites, and at least one application required for the functional operation of the portable terminal, a position received from the GPS satellites and the base station. Base station location information for calculating a compensation value based on a memory unit for storing information and GPS location information and base station location information stored in advance when the mobile terminal is located in a GPS signal receiving shadow section, and obtaining the compensation value from a base station; After compensation to the location-based service in the shadow section by the compensated location information A control unit for processing.

As described above, according to the system and method for providing location information of the mobile terminal proposed by the present invention, the error range of the location-based service according to the existing base station-based method can be drastically improved, thereby making the location-based more reliable to the user. Can provide services.

According to the present invention, when the mobile terminal is located in a GPS signal receiving shadow section such as an interior of a building, an underground space, a tunnel, and the like, a compensation value is obtained based on previously stored GPS location information and a base station location information, and the compensation value is determined in a shadow section. By compensating and updating the obtained base station location information and providing a service by the updated location information, it is possible to provide accurate location information service of the mobile terminal.

Therefore, regardless of the location of the mobile device, providing location-based services that require the exact location of the mobile device such as rescue requests, crime reports, friend location, lost location confirmation, geographic information systems, traffic information, car navigation and logistics control, etc. It is possible.

As a result, distrust of the user of the service caused by inaccurate information provision of the location information service can be solved, and the operator can generate profits by solving customer complaints.

In addition, when measuring the position of the mobile terminal in the GPS signal receiving shadow interval, GPS-based method can not be used to compensate for the inefficiency measured based on the base station. That is, even if the GPS-based method cannot be used in the GPS signal reception shadow section, the base station location information is compensated by the previously collected and calculated compensation value, thereby improving its accuracy.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that like elements are denoted by like reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted.

The present invention proposes a method and system for providing a location based service (LBS) in a mobile terminal having a GPS (Global Positioning System) function.

In an embodiment of the present invention, location information collected by the base station-based technology (hereinafter referred to as 'base station location information') and location information collected by the GPS-based technology (hereinafter referred to as 'GPS location information') are stored. . At this time, the location information storage matches and stores the GPS location information and the base station location information received at the same time. Subsequently, when the mobile terminal provides the location-based service by the base station-based technology in the GPS signal reception shadow section, the mobile station calculates the base station location information obtained by the base station-based technology by using the previously collected and stored GPS location information and the base station location information. By compensating with the value, we propose a technical solution that can provide a more accurate location-based service by the compensated location information.

Hereinafter, a system for a location-based service and an operation thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a view showing a schematic configuration of a location-based service providing system according to an embodiment of the present invention.

Referring to FIG. 1, a system of the present invention first includes a mobile terminal 100 having a GPS function, a base station (BS) 200, a GPS satellite 300, and the like for wireless section communication. do.

The mobile terminal 100 includes an input unit, an output unit, a memory unit, a wireless communication unit, and a control unit, and further includes a GPS receiver for receiving a GPS signal. An internal structure of the mobile terminal 100 will be described in detail later with reference to FIG. 3. The portable terminal 100 may have any form as long as it has a GPS receiver and a controller for processing the operation of the present invention.

In the present invention, the mobile terminal 100 represents a terminal capable of communicating by a GPS signal reception using a GPS receiver and a communication method established with a base station. Examples of such a mobile terminal 100 are all mobile devices operating based on a communication protocol corresponding to various communication systems such as a cellular phone, a Personal Communication Services (PCS) terminal, and an International Mobile Telecommunication 2000 (IMT-2000) terminal. In addition to communication terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), MP3 players, hand-held personal computers (PCs), and the like. That is, the mobile terminal 100 of the present invention is a broad concept including all information communication devices, multimedia devices, and all terminals of applications thereof.

The mobile terminal 100 generates location information using GPS information received from the GPS satellite 300 in units of a predetermined period of time, for example, 5 seconds, 10 seconds, 30 seconds, and 1 minute, and generates the generated location information (GPS). Location information) is stored in the internal memory. In addition, the mobile terminal 100 matches location information (base station location information) obtained from the base station 200 with the GPS location information and stores it in the internal memory unit.

The base station 200 processes a typical call. The base station 200 is an element constituting a mobile communication system. The mobile communication system includes a base station controller (BSC), a base station controller (BSC) for controlling the base station, and one or more base station controllers. It includes a mobile switching center (MSC) for connecting and performing call exchange, a home location register (HLR) for performing subscriber information management and location registration, and the like. The base station 200 provides location information, that is, cell identification information (Cell-ID) used to determine the location of the mobile terminal 100.

The GPS satellite 300 represents a satellite that provides GPS information used to determine the location of the mobile terminal 100. The GPS satellite 300 may continuously transmit GPS information necessary for calculating a position to the mobile terminal 100 through a carrier wave.

In such a system, referring to the operation of the present invention, first, the mobile terminal 100 activates a corresponding function in response to a location-based service function activation request. In addition, according to the function activation, each location information (GPS location information, base station location information) is obtained and stored from the base station 200 and the GPS satellite 300, and provides location information based on GPS.

In this case, the mobile terminal 100 may be located in a shaded section in which GPS information cannot be received from the GPS satellite 300 by movement. Then, the mobile terminal 100 calculates a compensation value using previously collected and stored location information (GPS location information and base station location information). Subsequently, the mobile terminal 100 compensates and updates the compensation value with the location information obtained from the base station 200. The mobile terminal 100 provides location information updated by the compensation value when providing location information based on a base station in the shadow section. An example of such an operation will be described with reference to FIG. 2.

On the other hand, since the method for calculating the location of the mobile terminal 100 using the cell identification information or GPS information of the base station corresponds to a general technique, its detailed description is omitted.

2 is a diagram illustrating a location-based service providing method of a mobile terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 2, first, the mobile terminal 100 collects GPS location information (a coordinates) and base station location information (b coordinates) by the GPS satellite 300 at the time t1 in response to activation of the function. Store and provide a location-based service using GPS location information (a coordinates) by GPS-based technology. The mobile terminal 100 stores the position information (c coordinates to h coordinates) from the GPS signal reception section 210, that is, from the time t1 to the time t4, in response to the above-described operation, and the GPS position information by the GPS-based technology. (c coordinate, e coordinate, g coordinate).

Next, the mobile terminal 100 cannot obtain GPS position information by the GPS satellite 300 when moving to the GPS signal receiving shadow section 230. Accordingly, the mobile terminal 100 may acquire only the location information m, n, and p by the base station 200 at each time point t5 to t7. In this case, the mobile terminal 100 is based on previously stored GPS position information (a coordinate, c coordinate, e coordinate, g coordinate) and base station position information (b coordinate, d coordinate, f coordinate, h coordinate). Calculate the compensation value.

For example, the difference between the GPS position information (g coordinate) and the base station position information (h coordinate) at time t4 is obtained, and the difference between the GPS position information (e coordinate) and the base station position information (f coordinate) at time t3. Find the value. This procedure can be obtained up to time t1. In addition, the difference value may be calculated only for a time point t4 at which GPS signals cannot be received, or may be calculated only up to information of a time point which is set a few steps ago.

Next, the mobile terminal 100 obtains an average value of the difference values. In this case, the mobile terminal 100 may calculate an average value by weighting the data at the latest time.

Next, the mobile terminal 100 determines the average value as the compensation value, and applies the compensation value to the base station location information measured by the base station based technology at each time point of the shadow section 230. For example, the mobile terminal 100 obtains the compensated position information by compensating the base station position information (m coordinate) obtained at time t5 with the compensation value. At time t5, location-based services are provided based on the compensated location information. This operation may be performed at each time point during the shadow period 230.

Subsequently, when entering the GPS signal reception section again, the mobile terminal 100 may continuously perform the above-described location information service and location-based service providing operation according to the GPS-based technology.

Next, the configuration and operation of the control means and the mobile terminal 100 including the same according to an embodiment of the present invention will be described. However, the present invention is not limited to the contents described below, it should be noted that it can be applied to various embodiments based on the following embodiments.

3 is a diagram schematically illustrating a configuration of a mobile terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the mobile terminal 100 according to an embodiment of the present invention includes a wireless communication unit 110, a GPS receiver 120, an input unit 130, a memory unit 140, an output unit 150, and a controller. 160 and the like.

The wireless communication unit 110 may establish a communication channel with a wireless communication system to perform voice communication and data communication. In particular, the wireless communication unit 110 receives the cell identification information (Cell-ID) from the base station of the area where the mobile terminal 100 is located and transmits it to the control unit 160.

The GPS receiver 120 receives GPS information from one or more GPS satellites. The GPS receiver 120 analyzes the received GPS information and transmits the latitude and longitude location information and time information of the mobile terminal 100 to the controller 160. Here, the GPS information transmitted from the GPS satellites includes ID codes, orbital positions, and time information of the GPS satellites, and the GPS receiver 120 has a difference in arrival speed between radio waves transmitted from a plurality of GPS satellites. The position coordinates of the mobile terminal 100 can be calculated by calculating. Meanwhile, according to an exemplary embodiment of the present invention, the GPS receiver 120 may not be provided as a separate device, but may perform a function of the GPS receiver 120 in a modem chip in charge of digital signal processing and call processing.

The input unit 130 may include a module related to the input of the mobile terminal 100. The input unit 130 may be classified into a key input unit for a user input and an audio processor for audio signal processing. The audio processor may include a microphone for receiving an external audio signal (eg, a user voice signal) and transmitting the received audio signal to the controller 150. The key input unit receives various character information and transmits a signal input in connection with setting and function control of various functions of the portable terminal 100 to the controller 160. The key input unit may be one or more of input means such as a touch pad, a touch screen, a keypad of a general key arrangement, a QWERTY keypad, and a function key set to perform a specific function according to the provision form of the mobile terminal 100. It can be formed by a combination of.

The memory unit 140 stores at least one application, data generated by a user or received from an external device (GPS satellite, base station), etc. required for operating a function according to an embodiment of the present invention. The data may include location information obtained from a base station and a GPS satellite according to an embodiment of the present invention. Such location information may be stored in the location information storage area 141 of the memory unit 140. Looking at the storage form of the location information may be represented as shown in the following Table 1.

As shown in Table 1, according to the present invention, location information (GPS location information) obtained from GPS satellites and cell location information (base station location information) obtained from a base station are stored for each set period. do. In this case, the location information storage may be continuously stored for each measurement time point, or may be continuously updated until a few steps before the current time point and the stored location information after the set step may be stored in a deleted form. In addition, according to the setting method, it may be stored only for the position information of the immediately previous time point based on the current time point.

The application may include an application for processing a function related to a location-based service of the mobile terminal 100, an application for matching and storing location information transmitted from a GPS satellite and a base station for each same reception time period, a GPS satellite for storing in response to an information request, and An application for calculating a difference value for the location information of each time zone of the base station, an application for calculating an average value by weighting the difference value of each time zone, an application for compensating the location information of the base station by the average value, the compensated location information It may be an application for providing a service according to the base station based method. Such an application may be stored in the application storage area 143 of the memory unit 140.

The memory unit 140 may include one or more buffers for temporarily storing data generated during the execution of the application. In addition, the memory unit 140 may be configured inside the mobile terminal 100, and may be configured externally, such as a smart card, and may include an internal / external mode storage medium. Of course.

The output unit 150 may include a module related to the output of the mobile terminal 100. The output unit 150 is a display unit for visually outputting the current state, basic information, the processing state according to the user input of the mobile terminal 100, and various audio signals (voice, sound) generated from the mobile terminal 100 Audio processing unit for processing. The audio processor may transmit an audio signal transmitted through the control unit 160 (eg, a voice signal of another user of a mobile terminal received through a mobile communication system, an audio signal such as a music file / video file played in the mobile terminal, etc.). It may include a speaker (Speaker) for outputting.

The controller 160 controls the overall operation of the mobile terminal 100 and the signal flow between the blocks in the mobile terminal 100. The controller 160 controls a signal flow between components such as the wireless communication unit 110, the GPS receiver 120, the input unit 130, the memory unit 140, and the output unit 150. do. The controller 160 may include a data processing unit including a codec and at least one modem for a mobile communication service.

In particular, the controller 160 controls a series of operations related to performing a function according to an embodiment of the present invention. Looking at the operation of the controller 160 to perform the function of the present invention as follows.

The controller 160 processes activation and deactivation of a function related to a location-based service in response to a user request. The controller 160 provides a location-based service by adaptively selecting a GPS-based positioning method and a base station-based positioning method according to the condition of the mobile terminal 100.

In particular, the controller 160 stores the GPS position information acquired through the GPS satellites and the base station position information obtained through the base station at each time point when the function is activated. The controller 160 provides a service based on GPS-based location information in a GPS signal receiving section when a function is activated. The control unit 160 obtains a compensation value using GPS location information and base station location information previously collected and stored in the GPS signal reception shadow section, and compensates for the base station based location information obtained in the GPS signal reception shadow section. Compensate by value The controller 160 provides a service based on the compensated location information.

The controller 160 calculates a difference value between the GPS position information and the base station position information collected and stored in advance, and determines the compensation value based on the average value of the difference values. In this case, the controller 160 may calculate the value by applying the set weight when calculating the average value.

For example, referring to FIG. 2 and Table 1, weights according to reliability are further added to the difference value based on the data (GPS location information g and base station location information h) at time t4. This weight can be given differentially from time t4 to time t1. Subsequently, the controller 160 calculates an average value of each difference value and determines the average value as a compensation value. Thereafter, the controller 160 compensates the compensation value to the base station-based location information m obtained at time t5. That is, the compensation value represents an error value between the GPS-based location information and the base station-based location information. Accordingly, by applying the error value to the location information (m), the location information equivalent to the GPS-based location information can be obtained. Can be. The control unit 160 provides a service through the compensated position information in the GPS signal reception shadow section through this procedure. Through this, it is possible to provide a more accurate service according to the location-based services.

The controller 160 may include a location information manager 161, a location calculator 163, a service processor 165, and the like, for the convenience of the aforementioned control operation.

The location information manager 161 manages location information obtained from a GPS satellite and a base station at each time point of a set period. The location information manager 161 matches and manages GPS location information obtained from a GPS satellite and base station location information obtained from a base station at the same time as the GPS location information. The location information manager 161 may accumulate and store the location information during activation of the location-based service function, and may delete the stored information when the location-based service function is deactivated. In addition, the location information management unit 161 may store the location information of a specified range according to the setting method, so that each time the new location information is stored can be sequentially removed from the first stored location information. That is, the position information of the set range may be updated periodically.

The location information manager 161 provides GPS location information and base station location information stored in response to the location information request. The location information manager 161 may store and manage a compensation value calculated by the location calculator 163. In this case, the correction value may be stored permanently or semi-permanently. That is, the correction value is a value for compensating the base station position information in the GPS signal reception shadow section. When the mobile terminal 100 is located in the GPS signal reception section, the compensation value may be removed. Alternatively, a plurality of compensation values may be stored by accumulating all compensation values generated until the location-based service function is deactivated in consideration of stability. When a plurality of compensation values are stored, it can be applied to the operation of the present invention by the recently generated compensation value. In addition, when the recent compensation value is lost, it can be applied to the operation of the present invention by the previous compensation value.

The location calculator 163 calculates a compensation value using location information managed by the location information manager 161. The location calculator 163 calculates a difference between GPS location information and base station location information at each time point. The position calculator 163 calculates an average value of a plurality of difference values when there are a plurality of difference values according to a setting method. The position calculator 163 determines and stores the difference value or the average value as a correction value.

The service processor 165 processes a service using any one of the GPS location information of the GPS-based technology and the compensation location information of the base station-based technology based on the compensation value under the control of the controller 160. do.

Meanwhile, the controller 160, the location information manager 161, the location calculator 163, and the service processor 165 include the above-described operation and the operation of FIG. 4 described later. It can also be implemented by.

In addition, FIG. 3 illustrates a schematic configuration example of a mobile terminal 100 according to an embodiment of the present invention for convenience of description. However, the mobile terminal 100 of the present invention is not necessarily limited to this configuration. Therefore, the mobile terminal 100 of the present invention may further include components not mentioned above, such as a camera module, an electronic payment module, a digital broadcasting module, a short range communication module, and an internet module, according to the provision form thereof. In addition, the mobile terminal 100 of the present invention may be excluded or replaced with other blocks in the above configuration depending on the form of the provision. This will be readily understood by those of ordinary skill in the art.

For example, the portable terminal 100 of the present invention may include a short range communication module for supporting short range wireless communication such as Bluetooth or ZigBee, and the short range communication module may be different according to the control of the controller 160. Short-range wireless communication can be performed with the mobile terminal. In addition, the mobile terminal 100 of the present invention may include an internet module for supporting communication using the internet network, and the internet module may be connected to another mobile terminal through an internet network under the control of the controller 160. Wireless communication with the network can be performed. In addition, the mobile terminal 100 of the present invention may include a broadcast receiving module for providing a function related to digital broadcasting.

4 is a diagram illustrating a location-based service providing method in a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 4, first, the mobile terminal 100 activates the service in response to the request (step 401), and checks the GPS signal correspondingly (step 403). The portable terminal 100 may determine whether the GPS signal can be received based on the signal check in step 405.

As a result of the determination, if the GPS signal is not receivable, the mobile terminal 100 may provide a service by a base station based method (step 407). In this case, the mobile terminal 100 may continue to check the GPS signal (step 403) even while providing the service by the base station-based method. When the mobile terminal 100 recognizes that the GPS signal can be received by the check, the mobile terminal 100 100 may provide a service by switching from the base station-based method to the GPS-based method, and may include the operation of the present invention to be described later.

As a result of the determination, if the GPS signal can be received, the mobile terminal 100 provides a service based on a GPS based method (step 411). In this case, the mobile terminal 100 receives the GPS at every time point in a set period. The location information and the base station location information are matched and stored for each viewpoint (step 413).

On the other hand, if the mobile terminal 100 recognizes that GPS signal reception is impossible (GPS signal reception shadow section) while providing a service by the GPS-based method (step 415), the mobile terminal 100 collects and stores each time previously collected. The compensation value is calculated using the GPS location information and the base station location information (step 417). To this end, the mobile terminal 100 first calculates at least one difference value between the GPS position information and the base station position information of each viewpoint. Subsequently, the mobile terminal 100 calculates an average value for each difference value and determines the average value as a compensation value for compensation of base station location information. At this time, the mobile terminal 100 may calculate the average value by assigning a weight to each time point when calculating the average value.

Next, the mobile terminal 100 compensates the base station position information acquired in the GPS signal reception shadow section by the compensation value (step 419). For example, the mobile terminal 100 predicts the compensation location information corresponding to the GPS location information by applying the compensation value to the base station location information acquired in the shadow section. Subsequently, the mobile terminal 100 updates base station position information acquired in the shadow section based on the compensated position information (step 421). In this case, the prediction and the update of the compensation position information by the compensation value are performed at each time point of the shadow section, and the compensation position information at the corresponding time point corresponds to the same information or other information according to whether the position of the mobile terminal 100 is moved. Can have

Next, the mobile terminal 100 provides a service based on the updated location information (step 423). Through this, even if the service is provided by the base station-based method in the GPS signal reception shadow section, the actual location information may provide accurate location information corresponding to the GPS-based method.

On the other hand, the mobile terminal 100 may continue to check the GPS signal even while providing a service in the shadow period, and if the mobile terminal 100 recognizes that the GPS signal can be received by the check, the mobile terminal 100 is the base station In addition to providing a service by switching from a GPS-based scheme to a GPS-based scheme, the above-described operation of the present invention can be continuously performed. The procedure of FIG. 4 may be terminated in response to a service deactivation request according to a user request.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

1 is a view showing a schematic configuration of a location-based service providing system according to an embodiment of the present invention,

2 is a view showing a location-based service providing method of a mobile terminal according to an embodiment of the present invention;

3 is a view schematically showing the configuration of a mobile terminal according to an embodiment of the present invention;

4 is a diagram illustrating a location-based service providing method in a mobile terminal according to an embodiment of the present invention.

Claims (18)

In the method for providing location information of a mobile terminal, Storing GPS position information and base station position information acquired in a GPS (Global Positioning System) signal reception section; Calculating a compensation value using the stored GPS location information and the location information of the base station when entering the GPS signal reception shadow section; Obtaining compensation position information by applying the compensation value to the base station position information acquired in the shadow section; And providing a location-based service based on the reward location information. The method of claim 1, The process of calculating the compensation value, Calculating a difference value between the GPS position information and the base station position information, and determining the difference value as the compensation value. The method of claim 2, Calculating a mean value of a plurality of difference values and determining the mean value as the compensation value when there are a plurality of difference values between the GPS location information and the base station location information. How to provide location information. The method of claim 3, And calculating the average value by assigning a weight to a difference value based on recent position information when calculating the average value. The method of claim 2, Checking the GPS signal in response to activating the function for the location-based service; Providing a location-based service in a base station-based manner when GPS signal reception is impossible; When the GPS signal can be received, providing a location-based service in a GPS-based manner, and storing the GPS location information obtained through the GPS satellite and the base station location information obtained through the base station How to provide location information. The method of claim 1, The location information providing method of the mobile terminal, characterized in that for matching the GPS location information and the base station location information for each time point of the set period. In the mobile terminal, A wireless communication unit which forms a communication channel with a wireless communication system to perform voice communication and data communication, and receives base station information from a base station in an area where a mobile terminal is located; A GPS receiver for receiving GPS information from one or more Global Positioning System (GPS) satellites; A memory unit for storing location information received from at least one application, the GPS satellites and the base station required for the functional operation of the portable terminal; When the mobile terminal is located in the GPS signal reception shadow section, a compensation value is calculated by using GPS location information and base station location information stored in advance, and the compensation value is compensated by base station location information obtained from a base station, and then the compensated location. And a controller for processing the location-based service in the shadow section based on the information. The method of claim 7, wherein the control unit And calculating a difference value between the GPS position information and the base station position information, and calculating the compensation value based on the difference value. The method of claim 8, wherein the control unit And when there are a plurality of difference values between the GPS location information and the base station location information, calculating an average value of the plurality of difference values and determining the average value as the compensation value. The method of claim 9, wherein the control unit And calculating the average value by weighting a difference value based on recent position information when calculating the average value. The method of claim 8, A mobile terminal, characterized in that for processing activation and deactivation of a function related to a location-based service in response to a user request, and storing GPS location information and base station location information acquired in a GPS signal reception section. The method of claim 11, wherein the control unit When the function is activated, the mobile terminal, characterized in that for matching the GPS position information obtained through the GPS satellite and the base station position information obtained through the base station for each point of view and stored. The method of claim 11, wherein the control unit Checks GPS signals in response to activation of location-based services; Provides location-based service by base station based method when GPS signal reception is impossible When the GPS signal can be received, the mobile terminal, characterized in that the location-based service provided by the GPS-based method and the GPS location information obtained through the GPS satellite and the base station location information obtained through the base station is stored. The method of claim 8, wherein the control unit A location information management unit that manages location information acquired from a GPS satellite and a base station at a set time point; And a position calculator which calculates a compensation value using the position information managed by the position information manager. 15. The apparatus of claim 14, wherein the position calculator And calculating the difference between the GPS location information and the location information of the base station and determining the difference value as the correction value. 15. The apparatus of claim 14, wherein the position calculator The mobile terminal, characterized in that for calculating the average value of the plurality of difference values when the difference value is a plurality, and determining the average value as a correction value. The method of claim 14, wherein the control unit A mobile terminal comprising a service processor for providing a location-based service according to the condition of the mobile terminal of the GPS position information of the GPS-based technology and the position information of the base station-based technology compensated by the compensation value . The method of claim 7, wherein the application is An application for matching and storing location information transmitted from a GPS satellite and a base station for each same reception time zone; An application for calculating a difference value of time slot position information of a GPS satellite and a base station stored in response to the request for information; An application that calculates an average value by weighting difference values of each time zone; And an application for compensating for the location information of the base station by the average value.

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