KR101328005B1 - Method for setting criteria area to decide position and apparatus therefor - Google Patents

Abstract

According to the present invention, the method for setting a location determination reference area sets a reference radius area centered on an installation position of an access point as a location determination reference area for each of a plurality of access points, and sets the signal strength of the access point measured at the reference radius. A first step of setting the reference signal strength of the position determination reference area; And dividing an area other than the area set as the location determination reference area into at least one area, setting each of the divided areas as a location determination reference area, and using the signal strengths of the peripheral access points as reference signal strengths of the corresponding location determination reference area. It includes; a second step to set to.

Description

METHOD FOR SETTING CRITERIA AREA TO DECIDE POSITION AND APPARATUS THEREFOR}

The present invention relates to a location measurement technology, and more particularly, to a method and apparatus for setting a location determination reference region as a reference for location determination in an indoor location measurement technology using an access point that provides a short-range communication service. .

Along with the development of mobile communication technology, a position measurement technique for measuring the position of a mobile terminal in a communication network has been actively studied. Typically, GPS (Global Positioning System) positioning technology using a satellite is widely used.

GPS positioning technology has a problem that a GPS receiver must be mounted on a mobile terminal, and GPS positioning technology has been developed by the US Department of Defense for military use, and a precise GPS positioning technique is not disclosed. In addition, GPS positioning technology has limitations that it can not be used in a room where satellite signals can not be received, such as inside a building. Therefore, as a complementary technology, efforts have been made to attempt location measurement using an access point for a short range wireless communication service.

The short-range wireless communication service connects to a wireless LAN access point installed near by using a terminal equipped with a wireless LAN such as a notebook computer, a PDA, or a smart phone so that the wireless Internet can be used while traveling. Recently, the demand for the short distance communication has increased, and a large number of access points are installed in a building such as a large shopping mall.

Since a large number of such access points are installed in the room, it is possible to use the access points to measure the position of the mobile terminal even in a room where GPS positioning technology is not applicable.

Recently, location positioning technology using an access point for short distance communication has been actively researched. The most important thing in positioning by using such an access point is to collect information of access points installed indoors and build it into a database. The more indoor access point information constructed in the database, and the higher the accuracy of indoor access point information, the higher the accuracy of location measurement.

An object of the present invention is to provide a method and apparatus for setting a position determination reference region which is a reference for position determination for enhancing the accuracy of indoor position measurement.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a method of setting a position determination reference area, wherein a reference radius area centered on an installation position of an access point is set as a first position determination reference area for each of a plurality of access points. A first step of setting the signal strength of the access point measured at the reference radius to the reference signal strength of the first position determination reference area; And dividing a region other than the region set as the first position determination reference region into at least one region, setting each of the divided region as a second position determination reference region, and determining the signal strengths of the peripheral access points. And setting a reference signal strength of the reference region.

Preferably, the first step is a calculation step of calculating the signal strength average value by performing the in-situ rotation at the distance of the reference radius, measuring the signal strength of the access point, performing the in-situ rotation, and averaging the measured signal strength of the access point. ; And a determination step of rotating the center of the installation position of the access point and repeatedly performing the calculation step and determining one of the average values of the signal strengths calculated according to the repetition.

Preferably, the second step is a reference signal strength of a second position determination reference region set for the divided region, and is a first position set around an installation position of each of the peripheral access points that receive a signal to the divided region. The signal strength below the reference signal strength of the determination reference region is set as the reference signal strength.

The position determination reference area setting apparatus according to another aspect of the present invention for achieving the above object sets a reference radius area around the installation position of the access point as a first position determination reference area for each of a plurality of access points, and First setting means for setting the signal strength of the access point measured at the reference radius to the reference signal strength of the first position determination reference area; And dividing a region other than the region set as the first position determination reference region into at least one region, setting each of the divided region as a second position determination reference region, and determining the signal strengths of the peripheral access points. And second setting means for setting the reference signal strength of the reference region.

Preferably, the first setting means, by rotating the in-situ at the distance of the reference radius to measure the signal strength of the access point to calculate a signal strength average value by rotating repeatedly around the installation position of the access point Any one of the calculated signal intensity average values is determined as the reference signal strength.

Preferably, the second setting means is a reference signal strength of the second position determination reference region set for the divided region, and is a first set centered on an installation position of each of the peripheral access points for which a signal is received in the divided region. The signal strength below the reference signal strength of the position determination reference area is set as the reference signal strength.

The present invention can increase the precision of indoor positioning by setting a reference area for position determination in consideration of the indoor signal environment.

In addition, the present invention can increase the accuracy of positioning by not only setting the reference area for position determination around the installation position of the access point, but also setting the reference area for other blank areas.

1 is a diagram illustrating an indoor communication environment according to an embodiment of the present invention.
2 is a flowchart illustrating a method of setting a first position determination reference region used for position measurement according to an embodiment of the present invention.
3 is a diagram illustrating an example of measuring a signal strength of an access point by using a position determination reference area setting device.
4 is a view for explaining a method for setting a second position determination reference area according to another embodiment of the present invention.
5 is a view for explaining a method for setting a second position determination reference area according to another embodiment of the present invention.
6 is a diagram showing the configuration of a position determination reference area setting apparatus according to another embodiment of the present invention.
7 is a diagram illustrating a table for a location determination reference area according to an embodiment of the present invention.
8 is a view showing the configuration of a position measuring system according to an embodiment of the present invention.
9 is a flowchart illustrating a position measuring method according to an embodiment of the present invention.

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an indoor communication environment according to an embodiment of the present invention.

Referring to FIG. 1, access points (APs) 110, 120, 130, and 140 that provide Internet services using short-range wireless communication (eg, WiFi) are installed everywhere in an indoor 100 such as a building. do. The communication terminal may access the wired Internet network through the access points 110, 120, 130, and 140 to use an Internet service.

Access points 110, 120, 130, and 140 that provide Internet services through short-range wireless communication have a service radius of only a few m. In addition, since access points 110, 120, 130, and 140 are inexpensive in purchasing cost and installation cost, a large number of access points 110, 120, 130, and 140 are installed and used in various places such as a home, a company, or a shopping mall. Therefore, as shown in FIG. 1, a plurality of access points 110, 120, 130, and 140 are installed in the room 100. It is generally installed in stores or offices in buildings.

And, as described above, since the service radius of the access point (110, 120, 130, 140 only a few m), the shadow of the signal of the access point (110, 120, 130, 140) does not propagate in the room There can be an area. Therefore, although additional access points 110, 120, 130, and 140 are installed in the shaded area, not all access points 110, 120, 130, and 140 need to have a network function. Since only the signal strength and identification information (eg, MAC address) of the point need to be checked, a dummy access point for transmitting a signal may not be provided in some areas. These dummy access points will be installed in areas with a small floating population.

2 is a flowchart illustrating a method of setting a first position determination reference region used for position measurement according to an embodiment of the present invention, and FIG. 3 is a signal strength of an access point using a position determination reference region setting apparatus. It is a figure which shows the example to measure.

Referring to FIG. 2, a user who collects information of an access point first carries a position determination reference area setting device and is located at a predetermined radius distance from an installation position of a specific access point (S201). For example, referring to FIG. 3, as shown in FIG. 3A, the user carries and positions the position determination reference area setting apparatus at a point 'A' that is 5 m from the access point 300.

The user then picks up the position determination reference area setting device at that position and rotates it in place to measure the signal strength of the particular access point. The position determination reference area setting apparatus averages the signal strengths of the specific access point measured while rotating in place (S203), and stores the average signal strength value (S205). For example, referring to FIG. 3, as shown in FIG. 3A, the user rotates in place at the point 'A', which is 5 m from the access point 300, and the position determining reference area setting device is The signal strength of the specific access point is averaged and the signal strength average value is stored.

The reason for the average of the signal strength of the access point by rotating it in place is that the position determination reference area setting device is used when the user stands with the position determination reference area setting device in front of his chest and is looking back at the access point. This is because the measured signal strength may be different from each other due to the multipath signal, fading phenomenon, and the like. In order to reflect such a deviation, since the direction in which the mobile terminal is held may be different for each person at the same position when measuring the position of the mobile terminal.

As such, the process of rotating the in-situ at a predetermined radial distance from the installation position of the specific access point and measuring and averaging the signal strength of the specific access point is performed at all radial distances while rotating around the specific access point (S207). ). For example, referring to FIG. 3, the user averages the signal strength of the access point 300 at the point 'A', moves clockwise, rotates in place at the point 'B', and the signal of the access point 300. Find the average of the intensities. The clockwise movement in this manner rotates in place at the final 'C' point and averages the signal strength of the access point 300. Preferably, in rotational movement, rotational movement is performed at regular intervals.

As described above, when the average of signal strengths are all obtained at a predetermined radius distance from the installation position of the specific access point, the access point collecting apparatus determines the average value of the largest signal strength among the average values of the signal strengths as the reference signal strength. (S209).

The reason for selecting the average value of the largest signal strength as the reference signal strength is to increase the accuracy of the location measurement when the mobile terminal is located. For example, when the mobile station measures the signal strength of the access point because the 'X' point 15 m away from the access point has a good signal environment, the signal strength is -60 dB, and the 'Y' point 15 m away has the same poor signal environment. Therefore, it is assumed that the signal strength is -70dB.

And if the reference signal strength determined to be located within 5 m from the corresponding access point is -65 dB and the reference signal strength is the average value of the smallest signal strength among the above-described average values of the signal strength, the 'X' and 'Y' The point 'X' is determined to be within 5 meters even though the point is not within 5 meters from the access point. Therefore, if the largest signal strength average value among the average values of the signal strength, for example, -50 dB is selected as the reference signal strength, the points 'X' and 'Y' may be determined not to be within 5 m from the access point.

In this way, after determining the reference signal strength at a predetermined radius distance, that is, a reference radius distance from the installation position of the specific access point, the position determination reference area setting device sets the reference radius around the installation position of the specific access point. The area is set as the first position determination reference area, and the determined reference signal strength is set as the signal strength that is the reference of the first position determination reference area (S211).

As described with reference to FIGS. 2 and 3, the apparatus for setting a position determination reference area maps and stores identification information of each first position determination reference area, for example, an MAC address of an access point when setting the first position determination reference area. . In addition, the position determination reference area setting apparatus provides a user with an interface for inputting the information of the first position determination reference area so as to provide basic information of the first position determination reference area, for example, address information on which an access point is installed, floor information, and store information. You can also receive and store coordinate information.

4 is a view for explaining a method for setting a second position determination reference area according to another embodiment of the present invention.

Even if the access points are installed adjacently as shown in FIG. 4 and the predetermined reference radius area is set as the first position determination reference area around the installation position of the access points as described with reference to FIGS. Some of the areas may not be set as the first position determination reference area. That is, a blank area occurs.

In FIG. 4, the dotted line area around each access point is the signal radius of each access point, and the solid line area is the first position determination reference area described with reference to FIGS. 2 and 3. As shown in FIG. 4, the first location determination reference area around the access point does not cover all indoor areas, and a blank area may occur between the access points. Therefore, the second position determination reference region is set for this blank region so that the position determination reference region is set for most indoor regions.

Specifically, referring to FIG. 4, a signal radius according to a standard is set based on the center of each access point 410, 420, 430, and an area A where the signal radius overlaps is set as a second position determination reference area. do. For example, in FIG. 4, a hatched area in which the signal radii of the access point 410, the access point 420, and the access point 430 overlap is set as the second position determination reference area.

The reference signal strength for each second position determination reference region A is a first position determination reference region set around each access point (that is, a solid line region centered on the installation position of each access point in FIG. 4). The signal strength range is set to be smaller than or equal to the reference signal strength set with respect to), as opposed to the first position determination reference area set around the access point. For example, in FIG. 4, the reference signal strength of the first position determination reference region set around the access point 410 is '-50 dB' and the first position determination reference region set around the access point 420. When the reference signal strength of the signal is '-55dB' and the reference signal strength of the first position determination reference area centered on the access point 430 is -60dB, the reference signal strength for the shaded area A is accessed. Set the point 410 to -50 dB, the access point 420 to -55 dB, and the access point 430 to -60 dB, but set the signal strength range to less than -50 dB for the access point 410. 420 is set to less than -55dB, the access point 430 is set to less than -60dB.

The reference position coordinates of the second position determination reference region set for such a blank area are polygons whose vertices are the installation position coordinates of the respective access points 410, 420, 430 that propagate signals to the second position determination reference region. It may be the center of gravity coordinates or the center of gravity coordinates.

Alternatively, it is measured at the edge in the east / west / south / north direction from the center of the second position determination reference region (such as the center of gravity coordinate or inner center coordinate, etc.) as the reference signal strength for the second position determination reference region A. The signal strength of the access point may be set as the reference signal strength. At this time, the signal intensity range of the second position determination reference region is set to a range smaller than the reference signal intensity measured at the edge in the east / west / south / north direction. Measuring the signal strength of the access point at the edge in the east / west / south / north direction can be performed in the position determination reference area setting device.

The second position determination reference area setting for the blank area described with reference to FIG. 4 above holds map data for the indoor area, and maps the location data of the access points to the map data of the indoor area. It is possible to display a signal location according to the 1 location determination area and the specification of each access point, and with reference to the displayed information to set a second location determination reference area for the blank areas in the map data, and reference signal strength and signal strength range. It can be performed in the device capable of setting. Such an apparatus may be the position determination reference area setting apparatus described in the embodiment with reference to FIGS. 2 and 3 or may be implemented in a server form.

5 is a view for explaining a method for setting a second position determination reference area according to another embodiment of the present invention.

In FIG. 5, the dotted line area around each of the access points 510, 520, and 530 is a signal radius of each access point, and the solid line area is the first position determination reference area described with reference to FIGS. 2 and 3. As shown in FIG. 5, the first location determination reference area centered on the access point does not cover all the indoor areas, and the first location determination criteria such as 'A', 'B', 'C', and 'D'. A blank area may occur that has not been set as an area. Therefore, the second position determination reference area is set for this blank area so that the blank area is minimized for all indoor areas.

Specifically, a signal radius according to the standard of each access point 510, 520, 530 is set, and an area where the signal radius overlaps is set as the second position determination reference area. For example, in FIG. 5, an 'A' region where the signal radii of the access point 510 and the access point 520 overlap, and a 'D' region where the signal radii of the access point 520 and the access point 530 overlap, and also 'B' areas where the signal radii of the access point 510 and the access point 530 overlap, and 'C' areas where the signal radii of the access point 510 and the access point 520 and the access point 530 overlap, respectively. Set to the second position determination reference area.

The reference signal strength for each of the second position determination reference regions A, B, C, and D is set for the first position determination reference region (ie, the solid line region in FIG. 5) set around each access point. The signal intensity range is set to be smaller than or equal to one reference signal intensity, and is opposite to the first position determination reference region (ie, the solid line region in FIG. 5) set around the access points 510, 520, and 530. For example, in FIG. 5, the reference signal strength of the first position determination reference region set around the access point 510 is '-50 dB' and the first position determination reference region set around the access point 520. When the reference signal strength of the signal is '-55dB', the access point 510 is set to -50dB and the access point 520 is set to -55dB as the reference signal strength for the region 'A', but the access point is within the signal strength range. In the case of 510, it is set to less than -50 dB, and in the case of an access point 520, it is set to less than -55 dB.

The reference position coordinates of the second position determination reference region set for such a blank area are polygons whose vertices are the installation position coordinates of the respective access points 410, 420, 430 that propagate signals to the second position determination reference region. It may be the center of gravity coordinates or the center of gravity coordinates. In the area where the signal areas of the two access points overlap, the center of the installation location coordinates of the two access points may be the reference location coordinates.

Alternatively, the reference signal strength for each second positioning reference region (A, B, C, D) is used as the reference signal strength of the access point measured at the edge in the east / west / south / north direction from the center of each second positioning reference region. The signal strength may be set as the reference signal strength. At this time, the signal intensity range of the second position determination reference region is set to a range smaller than the reference signal intensity measured at the edge in the east / west / south / north direction. Measuring the signal strength of the access point at the edge in the east / west / south / north direction can be performed in the position determination reference area setting device.

The second position determination reference area setting for the blank area described with reference to FIG. 5 above holds map data for the indoor area, and maps the installation data of the access points to the map data of the indoor area, centering on each access point. It is possible to display a signal location according to the 1 location determination area and the specification of each access point, and with reference to the displayed information to set a second location determination reference area for the blank areas in the map data, and reference signal strength and signal strength range. It can be performed in the device capable of setting. Such a device may be a location determination reference area setting device carried by the users described in the embodiments described with reference to FIGS. 2 and 3 or may be implemented in a server form.

6 is a diagram showing the configuration of a position determination reference area setting apparatus according to another embodiment of the present invention.

As shown in FIG. 6, the position determination reference area setting device determines the position set by the first setting module 610 and the first setting module 610 for setting the first position determination reference area around the access point. And a second setting module 630 for setting the second position determination reference area for the blank area that the reference area does not cover.

The first setting module 610 includes an input unit 611, a signal strength measuring unit 613, an average value calculating unit 615, a reference signal strength determining unit 617, and a storage unit 619.

The input unit 611 receives information related to setting the first position determination reference area from the user. For example, the input unit 611 may include a signal strength measurement start / end command, identification information of a location determination reference area, identification information of an access point (for example, a MAC address), coordinate information of an access point, reference radius information, and an address where an access point is installed. Enter floor information, store information, etc.

The signal strength measuring unit 613 searches for the signal of the access point selected by the user, measures the signal strength of the corresponding access point, and stores the signal in the storage unit 619.

Preferably, the signal strength measurement unit 613 starts measuring the signal strength of the access point at the time when the signal strength measurement start command is input through the input unit 611, and the signal strength measurement end command is input through the input unit 511. The signal strength measurement of the access point is terminated at this point.

When the signal strength measurement unit 613 ends the signal strength measurement, the average value calculator 615 extracts the signal strength values measured by the storage unit 619, calculates a signal intensity average value, and stores the signal strength average value in the storage unit 619. do.

When the reference signal strength determination input is received through the input unit 611, the reference signal strength determiner 617 sets the largest signal strength average value among the signal strength average values of the access point stored in the storage unit 619 to a first position. It is determined as the reference signal strength of the determination reference area and stored in the storage unit 619.

As described above with reference to FIGS. 2 and 3, the user may rotate the in-situ at a reference radius distance from the access point by using a position determination reference area setting device and measure and average the signal strength of the access point. Rotate to the center and repeat. When the signal strength average value calculation process for one of the access points is completed, the reference signal strength determiner 517 converts the largest signal strength average value among the average signal strength values into the reference signal strength of the corresponding access point according to a user input. Decide

The storage unit 619 may identify identification information about the first location determination reference area, identification information and position coordinates of the access point corresponding to the first location determination reference area, reference radius information, reference signal strength, and range information (ie, reference). Store floor information, store information, etc.).

In addition, the storage unit 619 stores indoor / outdoor map data for setting the first location determination reference area, signal intensity radius information and location coordinates according to the access point standard, and the like.

Referring to FIG. 6, the second setting module 630 which sets the second position determination reference area for the blank area not covered by the first position determination reference area set by the first setting module 610 may set the blank area. A unit 631 and a reference signal strength setting unit 633 are included.

The blank area setting unit 631 displays indoor and outdoor map data stored in the storage unit 619 on the display device according to a user's input through the input unit 611, and focuses on the access points with reference to the storage unit 619. The set first position determination reference area is overlaid and displayed on the map data displayed on the display device.

The blank area setting unit 631 receives a specific blank area from the user through the input unit 611 in a state where the first location determination reference area set based on the map data and the access points is superimposed and receives the second location determination reference area. Set to.

Preferably, the blank area setting unit 631 displays a signal radius according to the standard of each access point in a state in which the blank area setting unit 631 overlaps and displays the map location and the first location determination reference area set around the access points. You can select a blank area.

The reference signal strength setting unit 633 sets a reference signal intensity and a range of signal strength for the second position determination reference area set by the blank area setting unit 631 and stores the ranges in the storage unit 619.

Specifically, the reference signal strength setting unit 633 sets the reference signal strength of the first position determination reference area set for the access point covering the second position determination reference area set by the blank area setting unit 631. Display on the display device. The reference signal strength setting unit 633 selects the reference signal strength displayed on the corresponding display device from the user through the input unit 611 as the reference signal strength of the second position determination reference area set by the blank area setting unit 631. And a signal strength range smaller than the selected reference signal strength is selected as the signal strength range of the second position determination reference area set by the blank area setting unit 631.

In addition, the reference signal strength setting unit 633 may set the reference signal strength for the second position determination reference area set by the blank area setting unit 631 through the signal strength measuring unit 613. Specifically, the reference signal strength setting unit 633 is configured to center the second position determination reference area set by the blank area setting unit 631 according to a user's input through the input unit 611 (eg, installation of a peripheral access point). The signal strength of the access point is measured by the signal strength measuring unit 613 at the edge in the east / west / south / north direction from the center of gravity of the polygon centered on the location, etc.) and based on the measured signal strength Can be set to the signal strength. In this case, the reference signal strength setting unit 633 sets the signal strength range of the second position determination reference region to be smaller than the reference signal strength measured at the edge of the east / west / south / north direction.

Components constituting the position determination reference region setting apparatus set with reference to FIG. 6 may be implemented as one physical apparatus as shown in FIG. 6, or only some of the functions are implemented in a separate terminal and some components are It may be implemented in the form of a server. The terminal measures the signal strength of the access point, and transmits the information, signal strength, and measurement position of the access point to the server through the communication network, and the server may set the location determination reference area using the received data.

7 is a diagram illustrating a table for a location determination reference area according to an embodiment of the present invention.

As shown in Fig. 7, the table according to the present embodiment includes a field 710 for recording the identification number of the position determination reference area, a field 720 for recording the reference position coordinates of each position determination reference area, and each position determination. A field 730 for recording the MAC address of the access point covering the reference area, a field 740 for recording the reference signal strength and signal range of each location determination reference area, and layer information corresponding to each location determination reference area A field 740, and a field 760 for recording store information corresponding to each location determination reference area.

The reference position coordinate may be an installation position coordinate of the access point, or may be a position coordinate with respect to the center of the second position determination reference region set for the blank area. Each position coordinate is preferably a latitude / longitude coordinate.

In Fig. 7, the position determination reference area of identification number '1' is the first position determination reference area centered on the access point, and the identification number '2' is the second position determination reference area set for the blank area. In the second position determination reference area set for the blank area, information of a plurality of access points through which signals are propagated to the area is recorded in a field 730, and a plurality of reference signal strengths are also recorded in a field 740.

The table as shown in FIG. 7 is stored in the access point information DB 870 described below and used for indoor location measurement of the mobile terminal.

Hereinafter, the indoor location measuring method of the mobile terminal will be described in detail with reference to FIGS. 8 and 9.

8 is a view showing the configuration of a position measuring system according to an embodiment of the present invention.

As shown in FIG. 8, the position measurement system according to the present embodiment includes a mobile terminal 810 and a position measurement server 850 that are positioning targets, and the mobile terminal 810 and the position measurement server 850 are connected to a communication network ( 630 transmits and receives data. Herein, the communication network 630 is a wired or wireless communication network as long as it is a communication network supporting communication between the mobile terminal 810 and the location measurement server 850 is not particularly limited.

The mobile terminal 810 is an object of location measurement, and measures information of a neighboring access point based on a user's location measurement input or based on a triggering message from the location measurement server 850. Is transmitted to the location measurement server 850, and receives the location measurement results from the location measurement server 850. The location measurement result includes at least one of an address, a store name, latitude / longitude coordinates, floor information, a building name, etc. of the location where the mobile terminal 810 is located.

The access point information DB 870 stores the information table of the access point as described with reference to FIG. 4.

The location measurement server 850 includes a location measurement request receiver 851, a reference area determiner 853, and a location measurement result transmitter 855.

The position measurement request receiver 851 receives a position measurement request. The location measurement request may be received from the mobile terminal 810 that is the location target, or may be received from another mobile terminal that is not the location target.

When the location measurement request is received from the mobile terminal 810 that is the location target, the location measurement request receiver 851 receives subscriber identification information and measurement information (MAC address, signal strength, etc.) of the neighboring access point from the mobile terminal 810 that is the location target. Receive a location measurement request comprising a.

Alternatively, the location measurement request receiving unit 851 receives a location measurement request including subscriber identification information of the location target mobile terminal 810 from another mobile terminal (or a web server), and then triggers a message to the location target mobile terminal 810. In this case, subscriber identification information and measurement information of a neighboring access point may be received from the positioning target mobile terminal 810.

The reference area determination unit 853 searches the access point information DB 870 using the measurement information of the neighboring access point received from the positioning target mobile terminal 810, and the position where the positioning target mobile terminal 810 is located. The judgment reference area is determined.

In detail, the reference area determiner 853 may measure the measured signal strength of the neighboring access points received from the positioning target mobile terminal 810 and the reference signal strength and signal of each position determination reference area stored in the access point information DB 870. The intensity ranges are compared to select the corresponding position determination reference area.

For example, when the signal strength of the access point having the MAC address 111.111 received from the positioning target mobile terminal 810 is −38 dB, the reference area determination unit 853 may determine the position where the identification number is “1” in the table of FIG. 7. The determination reference area is determined as the area where the positioning target mobile terminal 810 is located.

The location measurement result transmitter 855 extracts, from the access point DB 870, address information, store name, floor information, coordinates, and the like corresponding to the location determination reference area determined by the reference area determination unit 853. The location measurement result is transmitted to the place where the location measurement is requested, for example, the mobile terminal 810 based on the extracted information.

The location measurement result transmitter 855 may transmit geographic data displaying a marker corresponding to the extracted address information and coordinates in association with a geographic information system (GIS), or correspond to the extracted address information and floor information. The extracted coordinates may be displayed on a drawing of a room, and a store name may be recorded and transmitted, or an address, a store name, etc. may be recorded and transmitted in a message. There is no particular limitation on the type of transmission.

9 is a flowchart illustrating a position measuring method according to an embodiment of the present invention.

As shown in FIG. 9, a user who wants to check his / her location executes a location service related process in the mobile terminal 810 and measures a neighboring access point (S901).

After measuring the neighboring access point as described above, the mobile terminal 810 transmits a location measurement request including the measured measurement information (MAC address, signal strength, etc.) and subscriber identification information of the measured neighboring access point through the communication network 830. It transmits to the location measurement server 850 (S903).

The location measurement server 850 receiving the location measurement request searches for the access point information DB 870 by using the measurement information of the neighboring access point received from the mobile terminal 810, and determines the location of the mobile terminal 810. The position determination reference area serving as the reference for the position measurement is determined (S905).

Specifically, the location measurement server 850 measures the measurement signal strength of the neighboring access points received from the mobile terminal 810 and the reference signal strength and signal strength range of each location determination reference region stored in the access point information DB 870. In comparison, the corresponding position determination reference area is selected.

In this way, after selecting the location determination reference area serving as the location measurement standard, the location measurement server 850 accesses the address information, the store name, the floor information, the coordinates, and the like corresponding to the selected location determination reference area to the access point DB 670. Extract (S907), and transmit the location measurement result to the mobile terminal 810 based on the extracted information (S909).

The location measurement server 850 may transmit geographic data displaying a marker corresponding to the extracted address information and coordinates in association with a geographic information system (GIS), or indoors corresponding to the extracted address information and floor information. The extracted coordinates may be displayed on the drawings, and the store name may be recorded and transmitted. Alternatively, the address may be recorded and transmitted in a message.

The mobile terminal 810 displays the location measurement result received from the location measurement server 850 through the display device (S911). Therefore, the user can pinpoint the location of where he is currently located. In particular, when you do not know the location of the store you want to go, such as a large shopping mall, the current location is displayed on the map of the mall so that you can easily grasp the location of the store you want to go.

9 illustrates an example in which the mobile terminal 810 requests a location measurement and receives a location measurement result according to the embodiment, the terminal requesting location measurement may be different from the location target mobile terminal, and the location measurement server In operation 850, the triggering message is transmitted to the positioning target mobile terminal to receive the measurement information of the neighboring access point, and the position measurement result is measured after measuring the position of the positioning target mobile terminal based on the received measurement information of the neighboring access point. The mobile station can transmit the measurement request to the mobile terminal.

The method of the present invention as described above may be embodied as a program and stored in a computer-readable recording medium (such as a CD-ROM, a RAM, a ROM, a floppy disk, a hard disk, or a magneto-optical disk).

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. In addition, the features described in the individual embodiments herein may be combined and implemented in a single embodiment. Conversely, various features described herein in a single embodiment may be implemented in various embodiments individually or in a suitable subcombination.

It is to be understood that, although the operations have been described in a particular order in the figures, it should be understood that such operations are performed in a particular order as shown, or that a series of sequential orders, or all described operations, . In some circumstances, multitasking and parallel processing may be advantageous. It should also be understood that the division of various system components in the above embodiments does not require such distinction in all embodiments. The above-described program components and systems can generally be implemented as a single software product or as a package in multiple software products.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

611: input unit 613: signal strength measurement unit
615: average value calculation unit 617: reference signal strength determination unit
619: storage unit 631: blank area setting unit
633: reference signal strength setting unit

Claims (14)

For each of the plurality of access points, a reference radius area centered on the installation position of the access point is set as the first location determination reference area, and the signal strength of the access point measured at the reference radius is referenced to the first location determination reference area. A first step of setting the signal strength; And
Divide an area other than the area set as the first location reference area into at least one area, set each of the divided areas as a second location reference area, and set signal strengths of peripheral access points to the corresponding second location reference. And a second step of setting the reference signal strength of the area. The method of claim 1,
In the first step,
Calculating a signal strength average value by rotating the in-situ at a distance of the reference radius, measuring the signal strength of the access point, performing the in-situ rotation, and averaging the measured signal strength of the access point; And
And a determination step of rotating around the installation position of the access point and repeatedly performing the calculating step and determining one of the average values of the signal strengths calculated according to the repetition, as the reference signal strength. How to set up the zone. 3. The method of claim 2,
Wherein,
And determining the largest signal strength average value among the signal strength average values as the reference signal strength. The method according to any one of claims 1 to 3,
The second step,
Reference signal strength of the second position determination reference region set for the divided region, which is equal to or less than the reference signal intensity of the first position determination reference region set around the installation position of each of the peripheral access points for which a signal is received in the divided region. And setting the signal strength as the reference signal strength. The method according to any one of claims 1 to 3,
The second step,
As the reference signal strength of the second position determination reference region set for the divided region, the signal strength of the peripheral access point measured at each of the east, west, north, and south edges of the divided region is set as the reference signal intensity. How to set up a reference area. The method according to any one of claims 1 to 3,
The second step,
And setting the center of gravity coordinates of the polygon whose vertices are the installation position coordinates of the peripheral access point as the center position coordinates of the second position determination reference region with respect to the divided region. For each of the plurality of access points, a reference radius area centered on the installation position of the access point is set as the first location determination reference area, and the signal strength of the access point measured at the reference radius is referenced to the first location determination reference area. First setting means for setting the signal strength; And
Divide an area other than the area set as the first location reference area into at least one area, set each of the divided areas as a second location reference area, and set signal strengths of peripheral access points to the corresponding second location reference. And second setting means for setting the reference signal strength of the area. The method of claim 7, wherein
The first setting means,
Based on any one of the signal intensity average values calculated by repeatedly performing the process of calculating the signal intensity average value by measuring the signal strength of the access point while rotating in place at the distance of the reference radius, and rotating it about the installation position of the access point. A position determination reference area setting device, characterized in that determined by signal strength. The method of claim 8,
The first setting means,
And the largest signal strength average value among the signal strength average values is determined as the reference signal strength. 10. The method according to any one of claims 7 to 9,
The second setting means,
Reference signal strength of the second position determination reference region set for the divided region, which is equal to or less than the reference signal intensity of the first position determination reference region set around the installation position of each of the peripheral access points for which a signal is received in the divided region. A position determination reference area setting device, wherein the signal strength is set as the reference signal strength. 10. The method according to any one of claims 7 to 9,
The second setting means,
As the reference signal strength of the second position determination reference region set for the divided region, the signal strength of the peripheral access point measured at each of the east, west, north, and south edges of the divided region is set as the reference signal intensity. Reference zone setting device. 10. The method according to any one of claims 7 to 9,
The second setting means,
A position determination reference area setting device, characterized in that the center of gravity coordinates of a polygon having the installation position coordinates of the peripheral access point as vertices are set as the center position coordinates of the second position determination reference area with respect to the divided area. Storage means for storing reference signal strength information of the location determination reference areas and additional information of each location determination reference area set by using access points for near field communication;
Receiving means for receiving measurement information including the measurement signal strength of the neighboring access points from the positioning target communication terminal;
Selecting means for selecting a position determination reference region corresponding to the measured signal strength by comparing the received measured signal strength of the neighboring access points with reference signal strength information stored in the storage means; And
And transmission means for extracting additional information corresponding to the location determination reference region selected by the selection means from the storage means and transmitting a position measurement result based on the additional information. The method of claim 13,
The reference signal strength is,
And a signal intensity average value measured by rotating in place at a reference radius distance from the access point.

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