KR20210030194A - System, Method and Computer-readable Medium for Determining The Location Of Moving Tag Based on Radio Signal - Google Patents

Abstract

The present invention relates to a system for determining a location of a wireless signal-based mobile tag, to a method thereof, and to a computer-readable medium. More specifically, provided are the system for determining a location of a wireless signal-based mobile tag, which can determine a location of a mobile tag, by processing data in the mobile tag through wireless communication between a beacon scanner and the mobile tag, and generating and transmitting information which can determine the location of the mobile tag, the method thereof, and the computer-readable medium.

Description

System, Method and Computer-readable Medium for Determining The Location Of Moving Tag Based on Radio Signal}

The present invention relates to a system, a method, and a computer-readable medium for determining the location of a wireless signal-based mobile tag, and more particularly, to process data from a mobile tag through wireless communication between a beacon scanner and a mobile tag, and The present invention relates to a system, a method, and a computer-readable medium for determining the position of a wireless signal-based mobile tag capable of determining the position of the mobile tag by generating and transmitting information capable of determining the position of the tag.

The access management system is a system that recognizes and manages a person who wants to enter a specific space through a door, and is currently widely used not only in access control facilities maintaining high security, but also in general offices and homes.

As such an access management system, for example, using radio frequency identification (RFID) or near field communication (NFC), a security card is given to the accessor and the security card is tagged, or fingerprint recognition, iris recognition, etc. A variety of access control systems such as biometrics are commercialized.

However, since such a conventional access management system focuses on the purpose of determining whether the person entering is the person who is permitted to enter, it is difficult to check the real-time access information such as the person who enters out and return. many.

On the other hand, BLE communication is a technology that uses Bluetooth 4.0 or higher, and is a technology that is attracting attention in the modern society because it has a wider communication range, high accuracy, and low power consumption compared to the existing Bluetooth communication.

In accordance with this trend, interest in access management systems using beacons using BLE communication is also increasing in recent years. In the case of an access management system using a beacon, there is an advantage in that it is possible to track not only whether the person is permitted to enter or not, but also continuous access information such as entrance and exit of the person.

However, a conventional access control system using a beacon may recognize a location of a moving transmitter by comparing a difference in signal strength by receiving a signal from a transmitter that transmits a wireless signal from a receiver fixed inside or outside. Since beacons consume less power, a system that transmits signals from such a moving target seems appropriate, but has a disadvantage in that the amount of data to be processed increases exponentially when the number of moving devices increases. In order to solve this problem, it is necessary to perform signal processing in a moving device to derive location information, and to transmit only the derived location information to a service server, but there is no conventional technology for providing such a service.

The present invention processes data from a mobile tag through wireless communication between a beacon scanner and a mobile tag, and generates and transmits information to determine the position of the mobile tag, thereby determining the position of the mobile tag. It is an object to provide a system, method, and computer-readable medium for determining the location of a tag.

In order to solve the above problems, the present invention provides a system for determining a location of a mobile tag based on a wireless signal, comprising: a plurality of beacon scanners for broadcasting a scanner signal including device-specific information; A movable tag for receiving a plurality of scanner signals from a plurality of beacon scanners and broadcasting a second beacon signal based on a reception intensity of the plurality of scanner signals, wherein the second beacon signal includes a plurality of beacon scanners It provides a system for determining the location of a wireless signal-based mobile tag, including identification information related to at least one device-specific information and tag-specific information of the mobile tag.

In an embodiment of the present invention, the identification information may include information related to device-specific information of a beacon scanner that transmits a scanner signal having the highest reception strength from the mobile tag among a plurality of scanner signals.

In an embodiment of the present invention, the mobile tag includes: a signal collection step of collecting scanner signals transmitted from the plurality of beacon scanners; A signal filtering step of deriving a filter reception intensity filtered by a predetermined method with respect to the reception intensity of the collected scanner signal; A discrimination step of deriving discrimination information related to device-specific information of at least one or more of the plurality of beacon scanners based on the plurality of filter reception intensities of the scanner signals of the plurality of beacon scanners; And a broadcasting step of broadcasting the second beacon signal.

In an embodiment of the present invention, the mobile tag stores, for each scanner signal received from each beacon scanner, the filtered filter reception strength determined in the previous step, and the predictive variable determined in the previous step, and the current step The filtered filter reception strength and the predictor variable may be updated based on the signal strength of the scanner signal received at, the filtered filter reception strength determined in the previous step, and the predictor variable determined in the previous step.

In an embodiment of the present invention, the beacon scanner may transmit location information of the mobile tag derived based on the second beacon information received from the mobile tag to the service server.

According to an embodiment of the present invention, since the location information of the mobile tag derived from the mobile tag is transmitted to the beacon scanner and the service server determines the location of the mobile tag based on the received location information, the overload of data processing can be reduced. It can exert the effect that can be.

According to an embodiment of the present invention, it is possible to achieve an effect of reliably determining a location by dividing an area to be identified, such as entering and exiting a door based on an entrance door.

According to an embodiment of the present invention, the beacon scanner uses a plurality of processors to process signals, thereby stabilizing an unstable signal of BLE communication using a signal of a high frequency band, thereby exerting an effect of deriving more accurate data. I can.

According to an embodiment of the present invention, by using a Kalman filter for a plurality of received data, it is possible to improve the efficiency of signal processing by deriving information based on the most recent data without the need to accumulate all data. It can exert a good effect.

According to an embodiment of the present invention, by changing the sleep mode, normal mode, and active mode of the mobile tag, when the user does not use the mobile tag, the beacon signal is not transmitted, thereby minimizing battery power consumption. It can exert the effect that can be.

1 schematically shows an installation example of a system for determining a location of a mobile tag based on a radio signal according to an embodiment of the present invention.
FIG. 2 schematically shows the form of a system for determining the location of a mobile tag based on a radio signal according to an embodiment of the present invention.
3 schematically shows the internal configuration of a beacon scanner according to an embodiment of the present invention.
4 schematically shows the internal configuration of a removable tag according to an embodiment of the present invention.
5 schematically shows a signal transmission/reception method for each operation mode of a mobile tag according to an embodiment of the present invention.
6 schematically illustrates a process of converting a mobile tag from a normal mode to an active mode according to an embodiment of the present invention.
7 schematically illustrates a process of converting a normal mode and an active mode according to the passage of time of a mobile tag according to an embodiment of the present invention.
8 schematically shows a process of processing a beacon signal according to a mode conversion process of a mobile tag according to an embodiment of the present invention.
9 schematically illustrates a data transmission/reception process through a conventional Bluetooth connection according to an embodiment of the present invention.
10 schematically shows a process of processing a beacon signal transmitted from a mobile tag and a beacon scanner according to an embodiment of the present invention.
11 schematically shows a step of performing a removable tag according to an embodiment of the present invention.
12 schematically shows a packet format of data transmitted by a beacon scanner according to an embodiment of the present invention.
13 schematically shows a packet format of data transmitted by a mobile tag according to an embodiment of the present invention.
14 schematically shows a form of data to be filtered according to a signal filtering step of a mobile tag according to an embodiment of the present invention.
15 schematically shows a process of processing a plurality of beacon signals collected according to the execution of a mobile tag according to an embodiment of the present invention.
FIG. 16 schematically shows a graph showing a reception intensity filtered according to a signal filtering step of a beacon signal received from a beacon scanner by a mobile tag according to an embodiment of the present invention.
FIG. 17 schematically shows a graph showing a summed value obtained by summing the filtered signal intensity values derived by performing a signal filtering step by a mobile tag according to an embodiment of the present invention for each beacon scanner.
FIG. 18 schematically shows a graph showing the sum of the filtered filter reception strengths of the first beacon scanner and the second beacon scanner derived according to the execution of the signal filtering step of the mobile tag according to an embodiment of the present invention. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only "directly connected" but also "electrically connected" with another element interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

In addition, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In the present specification, the term "unit" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. Further, one unit may be realized by using two or more hardware, or two or more units may be realized by one piece of hardware. Meanwhile,'~ unit' is not meant to be limited to software or hardware, and'~ unit' may be configured to be in an addressable storage medium or configured to reproduce one or more processors. Thus, as an example,'~ unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays and variables. Components and functions provided in the'~ units' may be combined into a smaller number of elements and'~ units', or may be further separated into additional elements and'~ units'. In addition, components and'~ units' may be implemented to play one or more CPUs in a device or a security multimedia card.

1 schematically shows an installation example of a system for determining the location of a wireless signal-based mobile tag 1000 according to an embodiment of the present invention.

FIG. 1 shows two or more beacon scanners 2000 constituting a system for determining the position of a wireless signal-based mobile tag 1000 of the present invention, and one or more mobile tags 1000 that are subject to position determination.

Two or more beacon scanners 2000 may be installed in front of and behind a wall with one wall interposed therebetween. The at least one movable tag 1000 may be moved in a state possessed by the user or attached to various items possessed by the user to detect the location of the movable tag 1000. The mobile tag 1000 may repeatedly transmit a beacon signal, and although four mobile tags 1000 are shown in FIG. 1, the mobile tag 1000 that is the target of location detection by the system for determining the location of the present invention The number of) is not limited to that number. The beacon scanners 2000 are installed one at a time in both directions of the wall based on the door of the area in which the movable tag 1000 is to be accessed. Two or more beacon scanners 2000 may be installed depending on the size or shape of a building or space in which a system for determining the location of the movable tag 1000 is installed.

FIG. 2 schematically shows the form of a system for determining the location of a mobile tag 1000 based on a radio signal according to an embodiment of the present invention.

The service server 3000 of FIG. 2 corresponds to a computing device including at least one processor and at least one memory. As shown in FIG. 2, the beacon scanners 2000 may be installed one at a time in both directions with a wall of a space such as a building or a room therebetween. The movable tag 1000 may communicate wirelessly with the beacon scanner 2000 while being adjacent to or passing through the door of such a building or space. The beacon scanner 2000 may transmit a scanner signal and receive a first beacon signal and a second beacon signal, and the mobile tag 1000 may receive a scanner signal and transmit a beacon signal to the beacon scanner 2000. I can. The beacon scanner 2000 receives the second beacon signal including discrimination information for determining the location of the removable tag 1000 from the mobile tag 1000 and transfers the location information of the mobile tag 1000 to the service server 3000. I can send it. By installing beacon scanners 2000 in both directions of the wall based on the door of the area in which the mobile tag 1000 is to be accessed or not, and determining whether the mobile tag 1000 is in or out of the corresponding area, the mobile tag ( 1000) can be used to determine the more accurate location.

3 schematically shows the internal configuration of the beacon scanner 2000 according to an embodiment of the present invention.

The beacon scanner 2000 of the present invention includes at least one transmission module for transmitting the scanner signal; A trigger module 2400 for receiving the first beacon signal and requesting the mobile tag 1000 to change the operation mode of the mobile tag 1000 from the normal mode to an active mode; And a receiving module 2300 for receiving the second beacon signal.

As shown in (a) of FIG. 3, the beacon scanner 2000 includes a first transmission module 2100, a second transmission module 2200, a reception module 2300, and a trigger module 2400. The first transmission module 2100, the second transmission module 2200, the reception module 2300, and the trigger module 2400 may each operate as separate processors. In addition, the first transmission module 2100, the second transmission module 2200, the reception module 2300, and the trigger module 2400 include an antenna. In an embodiment of the present invention, an antenna included in the modules of the beacon scanner 2000 may be a directional antenna. When a signal received using a directional antenna is processed through filtering, an effect of obtaining more accurate data than a signal received using a non-directional antenna can be exhibited. The processor may be configured to process instructions of a computer program by performing basic arithmetic, logic, and input/output operations of an image optimization method for a compressed package file.

The transmission module transmits a scanner signal to the mobile tag 1000. The scanner signal includes device-specific information of the beacon scanner 2000 and is transmitted. Although the first transmission module 2100 and the second transmission module 2200 are shown in FIG. 3A, the beacon scanner 2000 is not limited to two transmission modules and has more transmission modules as needed. You can also use it.

The removable tag 1000 can determine whether to enter or exit a predetermined area (or door) based on the reception strength of the scanner signal received from the first transmission module 2100 and the second transmission module 2200. The discrimination information may be derived and transmitted to the beacon scanner 2000.

The receiving module 2300 receives a beacon signal received from one or more mobile tags 1000. The removable tag 1000 includes discrimination information including information related to device-specific information of the beacon scanner 2000 that received a plurality of scanner signals from the beacon scanner 2000 and transmitted the scanner signal with the highest reception strength, and a removable tag ( 1000) transmits a second beacon signal including tag-specific information, and the receiving module 2300 of the beacon scanner 2000 receives the second beacon signal transmitted by the mobile tag 1000. The received second beacon signal may be transmitted to the service server 3000 to become information that is the basis for determining the location of the mobile tag 1000.

The trigger module 2400 requests conversion of the operation mode of the removable tag 1000 from the normal mode to the active mode. Specifically, when it is determined that the mobile tag 1000 has entered a preset area of the beacon scanner 2000, the trigger module 2400 may request the mobile tag 1000 to change the operation mode. Receiving such an operation mode conversion request from the trigger module 2400, the removable tag 1000 may convert the operation mode from the normal mode to the active mode.

In addition, in determining that the mobile tag 1000 has entered a preset area, the trigger module 2400 determines whether the reception strength of the scanner signal transmitted by the mobile tag 1000 is within a preset range, and It is possible to generate a trigger for requesting an operation mode change of (1000).

The transmission module, the reception module 2300, and the trigger module 2400 correspond to a BLE communication module. In the present invention, since the mobile tag 1000 collects each data and directly performs a complex operation, a high operation load and a storage load may be required for the mobile tag 1000. In order to solve such a shortcoming, the active mode module 1300 of the mobile tag 1000 can be operated as necessary by dividing a transmission mode and a reception mode.

One or more of these transmission modules, reception modules 2300, and trigger modules 2400 are connected to the gateway 2500, as shown in FIG. 3, and received from the mobile tag 1000 through the gateway 2500. The beacon signal may be transmitted to the service server 3000.

On the other hand, in another embodiment of the present invention, the beacon scanner 2000 includes at least one transmission module for transmitting the scanner signal; At least one trigger module 2400 for receiving the first beacon signal and requesting the mobile tag 1000 to change the operation mode of the mobile tag 1000 from the normal mode to an active mode; And a receiving module 2300 for receiving the second beacon signal.

As shown in (b) of FIG. 3, the beacon scanner 2000 includes a first transmission module 2100, a second transmission module 2200, a reception module 2300, a first trigger module 2410, and a second A trigger module 2420, a third trigger module 2430, and a fourth trigger module 2440 are included. The system for determining the location of the movable tag 1000 of the present invention does not limit the number of the movable tags 1000 for which the location is to be determined, and may increase the number of the movable tags 1000 as necessary. When the number of removable tags 1000 is increased, more processors are required to request operation mode conversion from the removable tags 1000. Accordingly, as shown in (b) of FIG. 3, by increasing the number of trigger modules 2400 to 1 or more, more removable tags 1000 can be accommodated, and the operation mode for the removable tags 1000 It can exert the effect of performing smooth communication without causing an overload in requesting conversion.

In addition, the transmission module and the reception module 2300 are also not limited to those shown in FIG. 3, and a beacon scanner 2000 including one or more transmission modules and a reception module 2300 may be implemented as needed.

4 schematically shows the internal configuration of the movable tag 1000 according to an embodiment of the present invention.

The mobile tag 1000 of the present invention receives a plurality of scanner signals from a plurality of beacon scanners 2000 and a general mode for broadcasting a first beacon signal including tag-specific information, and the reception strength of the plurality of scanner signals One of the active modes for broadcasting the second beacon signal may be performed.

4, the movable tag 1000 may include a sleep mode module 1100, a normal mode module 1200, and an active module. In addition, the removable tag 1000 may include an acceleration sensor and a battery. Specifically, the mobile tag 1000 may perform any one of a sleep mode, a normal mode, and an active mode, and does not transmit and receive radio signals, only transmit, or transmit and receive radio signals depending on the operation mode. You can receive all of them. The movable tag 1000 measures the movement of the movable tag 1000 based on acceleration information measured by an acceleration sensor built in the movable tag 1000.

The sleep mode module 1100 measures motion by an acceleration sensor, and executes a sleep mode when there is no motion for a preset time.

The general mode module 1200 executes the general mode when motion is measured by the acceleration sensor.

The active mode module 1300 executes the active mode when a trigger is generated from the trigger module 2400 of the beacon scanner 2000.

Hereinafter, a sleep mode, a normal mode, and an active mode in which the mobile tag 1000 operates will be described in more detail.

5 schematically shows a signal transmission/reception method for each operation mode of the mobile tag 1000 according to an embodiment of the present invention.

The sleep mode in which the sleep mode module 1100 of the mobile tag 1000 operates refers to a mode in which no radio signals are transmitted and received as shown in FIG. 5A. The mobile tag 1000 operating in the sleep mode does not broadcast a beacon signal and does not scan a scanner signal. When operating in the sleep mode, the removable tag 1000 consumes the least amount of battery power.

The general mode in which the general mode module 1200 of the mobile tag 1000 operates refers to a mode in which a radio signal is transmitted but not received, as shown in FIG. 5B. The mobile tag 1000 operating in the normal mode may broadcast a beacon signal to the beacon scanner 2000. However, it does not scan the scanner signal. Preferably, the broadcasting interval t1 of the first beacon signal broadcast by the mobile tag 1000 in which the operation mode is the normal mode is a second beacon signal broadcast by the mobile tag 1000 in the active mode in the operation mode. Is longer than the broadcasting interval of t2.

The active mode in which the active mode module 1300 of the mobile tag 1000 operates refers to a mode in which both transmission and reception of radio signals are performed, as shown in FIG. 5C. The mobile tag 1000 operated in the active mode may broadcast a beacon signal to the beacon scanner 2000 and may receive a scanner signal broadcast by the beacon scanner 2000. The mobile tag 1000 receives a plurality of scanner signals during a predetermined reception time, and derives discrimination information related to one or more device-specific information based on the plurality of scanner signals. When a predetermined reception time elapses and a transmission time is reached, a second beacon signal including discrimination information derived based on a plurality of scanner signals is transmitted. Preferably, the broadcasting interval t2 of the second beacon signal broadcast by the mobile tag 1000 in the active mode is the first beacon broadcast by the mobile tag 1000 in the normal mode. It is shorter than the signal broadcasting interval (t1).

In this way, the movable tag 1000 repeatedly broadcasts a beacon signal except when operating in the sleep mode. When the operation mode is the normal mode, the first beacon signal broadcast by the mobile tag 1000 includes tag-specific information, and when the mobile tag 1000 approaches the beacon scanner 2000, the beacon scanner 2000 May detect the approach of the removable tag 1000 by scanning the first beacon signal.

Thereafter, when the beacon scanner 2000 determines that the mobile tag 1000 has entered within a preset range based on the received signal strength of the first beacon signal, a trigger is generated to change the operation mode of the mobile tag 1000 to the general mode. Requests to switch to active mode. The mobile tag 1000 converts the operation mode to an active mode at the request of the beacon scanner 2000, and the mobile tag 1000 converted to the active mode broadcasts a second beacon signal. The second beacon signal includes location information and tag-specific information of the mobile tag 1000 determined based on the scanner signal, and the beacon scanner 2000 that scans the second beacon signal is then transferred to the service server 3000. The location information of the tag 1000 is transmitted.

The mobile tag 1000, which operates by converting the sleep mode, the normal mode, and the active mode as described above, converts the operation mode and transmits a signal only when necessary to minimize power consumption when it meets a preset criterion as needed. It can exert the effect that can be. The mobile tag 1000 in which the normal mode is operated may be converted into an operation mode as described in FIGS. 6 and 7 to be described later. More detailed information will be described later.

6 schematically illustrates a process of converting a mobile tag 1000 from a normal mode to an active mode according to an embodiment of the present invention.

In accordance with the movement of the user holding the removable tag 1000, the removable tag 1000 may perform conversion of the operation mode. As shown in FIG. 6, the movable tag 1000 operating in the normal mode is in a state of being moved by the user. The mobile tag 1000 operating in the normal mode broadcasts a first beacon signal including tag unique information of the mobile tag 1000. 6, when the mobile tag 1000 operating in the normal mode enters a preset area of the beacon scanner 2000, the mobile tag 1000 is the trigger module 2400 of the beacon scanner 2000 The mode conversion request is received from and the operation mode is converted to the active mode. Preferably, whether to enter the preset area is determined based on the signal reception strength of the first beacon signal broadcast by the mobile tag 1000. The closer it is within a certain distance, the stronger the reception strength of the beacon signal, and based on the reception strength of the beacon signal, the beacon scanner 2000 can determine whether the mobile tag 1000 enters or leaves a predetermined area.

When the movable tag 1000 entering within the preset area of the beacon scanner 2000 moves only within the preset area, the active mode operation is maintained.

Thereafter, when the movable tag 1000 moves and deviates from a preset area of the beacon scanner 2000, the movable tag 1000 converts the operation of the active mode to the operation of the normal mode. Preferably, when a preset time elapses after leaving the preset area, the movable tag 1000 converts the active mode operation to the normal mode operation.

Preferably, the conversion of the operation mode of the mobile tag 1000 from the normal mode to the active mode may be performed based on a trigger generated between the beacon scanner 2000 and the mobile tag 1000.

7 schematically shows a process of converting a normal mode and an active mode according to the passage of time of the mobile tag 1000 according to an embodiment of the present invention.

The removable tag 1000 may also perform different conversion of the operation mode according to the lapse of time after entering the preset area. As shown in FIG. 7, when the mobile tag 1000 in which the normal mode is operating enters a preset area of the first beacon scanner 2000, the normal mode module 1200 of the mobile tag 1000 is a beacon scanner ( 2000) transmits the mode conversion request and converts the normal mode operation to the active mode operation. In addition, when moving only within a preset area of the first beacon scanner 2000, the movable tag 1000 maintains the active mode operation.

Thereafter, when the mobile tag 1000 deviates from the preset area of the first beacon scanner 2000 according to the user's movement, the mobile tag 1000 performs different operation mode conversion according to the lapse of time. As shown in FIG. 7, the mobile tag 1000 deviates from the preset area of the first beacon scanner 2000, but if the preset time has not elapsed, the active mode is not converted to the normal mode operation and the active mode continues. It is shown in operation. However, when a preset time elapses after leaving the preset area of the first beacon scanner 2000, the operation mode of the mobile tag 1000 is changed from the active mode to the normal mode.

Preferably, preferably, whether or not to enter the preset area may be determined based on the signal reception strength of the first beacon signal broadcast by the mobile tag 1000. The closer it is within a certain distance, the stronger the signal reception strength of the beacon signal, and based on this signal reception strength, the beacon scanner 2000 can determine whether the mobile tag 1000 enters or leaves a preset area.

Thereafter, when the mobile tag 1000 maintaining the active mode enters the preset area of the second beacon scanner 2000 before the preset time elapses, as shown in FIG. 7, the active mode is maintained. . When the mobile tag 1000, which has been converted to the normal mode operation after the preset time has elapsed, receives the mode conversion request from the second beacon scanner 2000 again when entering the preset area of the second beacon scanner 2000 The operation mode of the removable tag 1000 is changed from the normal mode to the active mode. When the moved movable tag 1000 moves only within a preset area of the second beacon scanner 2000, the active mode is maintained. Thereafter, when the preset area of the second beacon scanner 2000 is also deviated from the second beacon scanner 2000 according to the user's movement and the preset time elapses, the mobile tag 1000 changes the operation mode from the active mode to the normal mode.

In this way, the mobile tag 1000 maintains or converts the operation mode according to the lapse of a preset time, does not repeatedly perform unnecessary mode conversion, and converts the operation mode according to a preset criterion. It can exert an effect that can reduce consumption.

8 schematically shows the overall processing process of the beacon signal transmitted from the mobile tag 1000 and the beacon scanner 2000 according to an embodiment of the present invention.

The mobile tag 1000 operates in any one of a sleep mode, a normal mode, and an active mode, as described above, and may receive a scanner signal and transmit a beacon signal.

Specifically, in step (A), the movable tag 1000 detects motion based on acceleration information measured by the acceleration sensor. When there is no movement, the operation mode of the movable tag 1000 operates in a sleep mode and does not scan a scanner signal and does not broadcast a beacon signal.

In step (B), when motion is detected based on the acceleration information, the movable tag 1000 converts the operation mode from the sleep mode to the normal mode.

In step (C), the mobile tag 1000 in the normal mode broadcasts a first beacon signal.

In step (D), the beacon scanner 2000 determines whether the signal reception strength of the scanned first beacon signal meets a preset criterion.

In step (E), when the signal reception strength of the first beacon signal meets a preset criterion, the beacon scanner 2000 generates a trigger with the mobile tag 1000 to request conversion of the operation mode.

In step (F), the mobile tag 1000, upon receiving the request to change the operation mode of the beacon scanner 2000, converts the operation mode from the normal mode to the active mode.

In step (G), the beacon scanner 2000 transmits a scanner signal to the mobile tag 1000. Preferably, the beacon scanner 2000 repeatedly broadcasts a scanner signal regardless of the operation mode of the mobile tag 1000.

In step (H), the mobile tag 1000 operating in the active mode scans a scanner signal broadcast by the beacon scanner 2000. Based on the scanned scanner signal, discrimination information related to one or more device-specific information is derived. Preferably, the discrimination information means information related to device-specific information of the beacon scanner 2000 that has transmitted the scanner signal having the highest signal reception strength from the mobile tag 1000.

In step (I), the mobile tag 1000 broadcasts a second beacon signal including the identification information and tag unique information.

In step (J), the beacon scanner 2000 that has scanned the second beacon signal transmits the identification information and tag unique information to the service server 3000.

* In step (K), the position of the removable tag 1000 is determined based on the identification information, the tag-specific information, and the device-specific information of the beacon scanner 2000. In addition, it is possible to determine whether to enter or exit from the corresponding location.

In this way, the mobile tag 1000 may exhibit an effect of minimizing power consumption by changing the operation mode and transmitting a signal only when signal transmission is required. In addition, the mobile tag 1000 directly derives and transmits discrimination information related to device-specific information of the beacon scanner 2000 to which it is adjacent based on the scanner signal, so that the beacon scanner 2000 must process a plurality of raw data. In this case, it is possible to exhibit an effect that can be improved by preventing an overload occurring in the processor.

9 schematically shows a process of processing a beacon signal according to a mode conversion process of the mobile tag 1000 according to an embodiment of the present invention.

As described above, when the mobile tag 1000 enters a preset area of the adjacent beacon scanner 2000, it receives a request to change the operation mode of the mobile tag 1000 from the normal mode to the active mode. 9 schematically shows a process of a beacon scanner 2000 requesting a mode conversion to the mobile tag 1000.

Specifically, in step 10e, the mobile tag 1000 operating in the normal mode repeatedly transmits the first beacon signal.

In step 11e, the beacon scanner 2000 receiving the first beacon signal transmitted from the mobile tag 1000 determines whether the reception strength of the first beacon signal is within a preset range. The beacon scanner 2000 may determine whether the mobile tag 1000 has entered a preset area based on the reception strength of the first beacon signal.

In step 12e, when the removable tag 1000 enters a preset area of the beacon scanner 2000 in step 11e, the beacon scanner 2000 requests a scan response from the removable tag 1000. When the mobile tag 1000 enters a preset area, the beacon scanner 2000 requests a scan response from the mobile tag 1000 in order to request conversion of the operation mode of the mobile tag 1000.

In step 13e, the mobile tag 1000 receives a scan response request from the beacon scanner 2000 and transmits a scan response to the scan response request.

In step 14e, the beacon scanner 2000 receives a scan response from the mobile tag 1000.

In step 15e, the beacon scanner 2000 requests mode conversion to the active mode while transmitting the key value to the mobile tag 1000 that has received the scan response. The beacon scanner 2000 requests to change the operation mode of the mobile tag 1000 to an active mode while transmitting a key value to establish a wireless communication connection with the mobile tag 1000.

In step 16e, the mobile tag 1000 performs a procedure of verifying whether the key value received from the beacon scanner 2000 is a valid key value.

In step 17e, when it is verified that the key value is valid, the mobile tag 1000 switches the operation mode from the normal mode to the active mode.

Preferably, after the key value verification is performed on the mobile tag 1000, a Bluetooth connection between the beacon scanner 2000 and the mobile tag 1000 is performed. The mode conversion request from the normal mode to the active mode is made by immediately disconnecting the completed connection after the beacon scanner 2000 and the mobile tag 1000 are connected. When the connection is immediately disconnected immediately after being connected to the beacon scanner 2000, the removable tag 1000 recognizes that the mode should be changed, and changes the operation mode from the normal mode to the active mode.

10 schematically illustrates a conventional Bluetooth connection process and data transmission/reception process according to an embodiment of the present invention.

There is a difference between a connection process with the mobile tag 1000 performed by the trigger module 2400 of the beacon scanner 2000 and a conventional Bluetooth connection process. 10 shows a data transmission/reception process when the beacon scanner 2000 and the mobile tag 1000 perform a conventional Bluetooth connection process.

Specifically, in step S20, the mobile tag 1000 repeatedly transmits the first beacon signal.

In step S21, the beacon scanner 2000 receiving the first beacon signal transmitted from the mobile tag 1000 requests a scan response from the mobile tag 1000.

In step S22, the mobile tag 1000 receiving the scan response request transmits the scan response to the beacon scanner 2000.

In step S23, the beacon scanner 2000 receiving the scan response transmits a key value to the mobile tag 1000 and requests device connection.

In step S24, the mobile tag 1000 receiving the key value performs a key value verification to determine whether the key value is valid.

In step S25, when it is determined that the key value is valid by performing the key value verification, the connection between the beacon scanner 2000 and the removable tag 1000 is completed.

In step S26, the beacon scanner 2000 searches for a service from the connected mobile tag 1000.

In step S27, the mobile tag 1000 transmits information on its own service searched by the beacon scanner 2000.

In step S28, the beacon scanner 2000 receives information on a service and searches for a characteristic of the service.

In step S29, the mobile tag 1000 transmits information on the characteristics of the service searched by the beacon scanner 2000.

In step S30, the beacon scanner 2000 and the removable tag 1000 may exchange necessary data.

As described above, in the case of a conventional Bluetooth connection, when the beacon scanner 2000 requests the mobile tag 1000 to change the operation mode, all steps S20 to S30 are performed, and data for requesting mode conversion is exchanged in step S30. , You can request to change the operation mode. This method takes a long time to connect and exchange data. Therefore, in the present invention, after performing step S24 in which the beacon scanner 2000 requests the connection of the mobile tag 1000 and step S25 in which the connection is completed, immediately disconnecting the connection, the operation mode of the mobile tag 1000 It is defined as a trigger that requests conversion, and the movable tag 1000 performs mode conversion according to whether the trigger occurs. Preferably, step 15e is the same as disconnecting the device after performing steps S24 and S25.

With such an operation, the beacon scanner 2000 and the mobile tag 1000 may reduce unnecessary communication, thereby minimizing battery power consumption, and exhibiting an effect of faster communication.

11 schematically shows the steps of performing the removable tag 1000 according to an embodiment of the present invention.

The mobile tag 1000 may include a signal collection step (S1000) of collecting scanner signals transmitted from the plurality of beacon scanners (2000); A signal filtering step (S1100) of deriving a filter reception intensity filtered by a predetermined method with respect to the reception intensity of the collected scanner signal; A discrimination step (S1200) of deriving discrimination information related to at least one device-specific information from among the plurality of beacon scanners 2000 based on the plurality of filter reception strengths of the scanner signals of the plurality of beacon scanners 2000; And a broadcasting step (S1300) of broadcasting the second beacon signal.

Specifically, in the signal collection step (S1000), the mobile tag 1000 collects scanner signals from the plurality of beacon scanners 2000. Preferably, the removable tag 1000 is in an active mode. The system for determining the location of the movable tag 1000 of the present invention may include at least two beacon scanners 2000 and at least one movable tag 1000 according to a structure in a building and a space in which the system is installed, each Each of the mobile tag 1000 and each beacon scanner 2000 may broadcast each scanner signal and each beacon signal. The removable tag 1000 collects a scanner signal broadcast by each beacon scanner 2000.

In the signal filtering step (S1100), the mobile tag 1000 derives a filter reception intensity filtered by a predetermined method with respect to the reception intensity of the collected scanner signal. In the present invention, the scanner signal broadcast by the beacon scanner 2000 communicates in a high frequency band of 2.4 GHz, and it is difficult to derive accurate data without filtering. The mobile tag 1000 filters all of the collected scanner signals in a predetermined manner with respect to the signal reception strength.

Specifically, the signal filtering step (S1100) includes: a first-order filtering step of removing noise based on the received one or more scanner signals; It may include a second order filter step of deriving an average value based on one or more scanner signals that have passed the first order filter step.

In an embodiment of the present invention, in the first order filter step, the signal reception intensity may be filtered based on the Kalman filter. The Kalman filter is a filter that calculates a predictor based on the most recent data value to derive a new predicted value, and converts the predicted variable into a predictor reflecting the predicted value. If the amount of data to be processed is not large, you can use a method of storing and calculating both the collected data and the filtered data. However, if the amount of data is large and repetitive calculations are performed, the Kalman filter is used to determine the future value. It is possible to achieve the effect of obtaining the optimum value of the desired information without predicting and accumulating vast amounts of data.

In the second order filter step, an average value is derived by summing a plurality of scanner signals broadcast by the same beacon scanner 2000 among signals that have passed through the first order filter step. The scanner signal includes device-specific information of the beacon scanner 2000. Based on the device-specific information of the beacon scanner 2000 included in the scanner signal, the average value of the scanner signal broadcast from the same beacon scanner 2000 is derived as the filter reception strength.

Preferably, in the second filtering step, an average value given a weight for each signal based on the received signal strength may be derived as the filter received strength.

In the determination step (S1200), the movable tag 1000 is determined related to at least one device-specific information among the plurality of beacon scanners 2000 based on the plurality of filter reception strengths of the scanner signals of the plurality of beacon scanners 2000 Derive information. The identification information includes information related to device-specific information of the beacon scanner 2000 that has transmitted the scanner signal having the highest reception strength from the mobile tag 1000 among a plurality of scanner signals. In an embodiment of the present invention, the plurality of beacon scanners 2000 includes one or more transmission modules, and a plurality of scanner signals are broadcast from one or more transmission modules. Accordingly, the number of scanner signals scanned by the mobile tag 1000 is the number of all beacon scanners 2000 installed in the space * the number of transmission modules included in the beacon scanner 2000 can receive a scanner signal. . As the number of installed beacon scanners 2000 increases, the scanner signal scanned by the removable tag 1000 also increases. In order to distinguish a plurality of scanner signals, the scanner signal is broadcast by including information related to the device-specific information of the beacon scanner 2000, and the mobile tag 1000 is based on the device-specific information of the beacon scanner 2000. It is possible to derive discrimination information for knowing which beacon scanner 2000 is currently closest to the mobile tag 1000. A method of deriving specific discrimination information will be described later.

In the broadcasting (S1300) step, the mobile tag 1000 broadcasts a second beacon signal. The second beacon signal broadcast by the mobile tag 1000 includes identification information related to at least one device-specific information among the plurality of beacon scanners 2000 and tag-specific information of the mobile tag 1000.

Preferably, the mobile tag 1000 transmits a second beacon signal to the beacon scanner 2000, and the beacon scanner 2000 transmits the received second beacon signal to the service server 3000 through the gateway 2500. . The processing for recognition of the removable tag 1000 is performed by the receiving module 2300 of the beacon scanner 2000, and the gateway 2500 is the location information of the received mobile tag 1000, preferably, the mobile tag ( 1000) is transmitted to the service server 3000, the identification information including the door number and the inside and outside information.

12 schematically shows a packet format of data transmitted by the beacon scanner 2000 according to an embodiment of the present invention.

The transmission module of the beacon scanner 2000 repeatedly broadcasts a data packet as shown in FIG. 12. In an embodiment of the present invention, the data packet broadcast by the transmission module of the beacon scanner 2000 may include an equipment type, a door number, an access type, other information, and major and minor values.

The device-specific information of the beacon scanner 2000 and the tag-specific information of the mobile tag 1000 may be, for example, the type of equipment shown in FIG. 12. When 0x01 or 0x02 is preset as a number that is divided by the beacon scanner 2000, if the equipment type of the received data packet is 0x01 or 0x02, it may be determined that the signal is transmitted from the beacon scanner 2000. In this way, the types of equipment such as the beacon scanner 2000 or the movable tag 1000 can be classified. In addition, a unique number may be assigned to each door in which the beacon scanner 2000 is installed, and the door number to enter and exit may be classified accordingly.

In addition, the major and minor values may be data for classifying the transmission module of the beacon scanner 2000. 12(a) is a data packet transmitted by the first transmission module 2100 of the beacon scanner 2000, and FIG. 12(b) is a second transmission module 2200 of the beacon scanner 2000. Shows the data packet. If the Major value is 0x0100, a packet transmitted from the first transmission module 2100, and if the Major value is 0x0200, a packet transmitted from the second transmission module 2200 may be classified.

Such a data packet is preferably received when the operation mode of the mobile tag 1000 is an active mode.

13 schematically shows a packet format of data transmitted by the mobile tag 1000 according to an embodiment of the present invention.

The mobile tag 1000 may repeatedly broadcast a data packet as shown in FIG. 13. Specifically, when the operation mode of the mobile tag 1000 is a sleep mode, the mobile tag 1000 does not transmit or receive data. When the operation mode of the mobile tag 1000 is the normal mode, it repeatedly broadcasts a data packet as shown in (a) of FIG. 13. When compared with the data packet shown in FIG. 12, it is shown that the device type is shown differently as 0x04. In an embodiment of the present invention, it can be seen that 0x01 is classified as a beacon scanner 2000 and 0x04 is a removable tag 1000.

On the other hand, when the mobile tag 1000 operates in the normal mode, the data packet is broadcast with the door number and access type as default values (0x00). When the operation mode of the removable tag 1000 is in the general mode, since the scanner signal of the beacon scanner 2000 cannot be received, the identification information determining the location of the removable tag 1000 cannot be derived. Packets for door number and access type, which are information about the location of ), cannot be created. Therefore, in the normal mode, since the signal broadcast by the mobile tag 1000 is repeatedly transmitted to enable the beacon scanner 2000 to detect the mobile tag 1000, the door number and access type of the data packet are determined by the administrator. Data can be transmitted/received with the set default value.

13B shows a data packet format of a broadcasted second beacon signal when the operation mode of the mobile tag 1000 is an active mode. As compared with (a) of FIG. 13, it is shown that the other categories are the same, but the door numbers and access types are different. When the operation mode of the mobile tag 1000 is the active mode, the mobile tag 1000 may receive a scanner signal transmitted from the beacon scanner 2000, and the mobile tag 1000 receiving the scanner signal is Based on the plurality of beacon scanners 2000, a second beacon signal including discrimination information related to at least one or more device-specific information may be broadcast in the form of a data packet as shown in FIG. 13B. Preferably, the door number and the type of access are included in the identification information. Thereafter, the beacon scanner 2000 receiving the data packet as shown in (b) of FIG. 13 communicates with the service server 3000 through the gateway 2500 to identify identification information and tag uniqueness included in the second beacon signal. You can send information.

14 schematically shows a process of processing a plurality of scanner signals collected by the removable tag 1000 according to an embodiment of the present invention.

The mobile tag 1000 performs the signal collection step (S1000), and the mobile tag 1000 collects a plurality of scanner signals from the plurality of beacon scanners 2000. The signal strength of the collected plurality of scanner signals may vary depending on the location of the movable tag 1000.

14A shows that a total of four beacon scanners 2000 are installed in a plurality of room structures: Ain, Aout, Bin, and Bout. The mobile tag 1000 receives a scanner signal from each beacon scanner 2000, and the reception intensity of a plurality of scanner signals received differently according to the position of the mobile tag 1000 is received.

As shown in (b) of FIG. 14, while the mobile tag 1000 operates in the active mode, the mobile tag 1000 scans the scan timing and the broadcasting timing by dividing the operation mode of the mobile tag 1000 into an active mode. The only section and the broadcasting section can be divided. During scan timing, the movable tag 1000 scans a plurality of scanner signals. During the scan timing, the mobile tag 1000 continuously performs a signal filtering step on the received scanner signals to derive the filtered filter reception strength. Thereafter, the filter reception intensity among the received scanner signals is summed for each beacon scanner 2000, and the beacon scanner 2000 broadcasting the signal with the largest sum of the filter reception intensity is located at the location of the mobile tag 1000 and the maximum. It is determined by the adjacent beacon scanner 2000, and discrimination information including information related to device-specific information of the beacon scanner 2000 that has transmitted the scanner signal having the highest reception strength is derived. Preferably, the cycle of scan timing and broadcasting timing may be preset to a cycle most suitable for data processing.

14C is a graph showing the filtered filter reception intensity of the scanner signal scanned by the mobile tag 1000 during scan timing. The mobile tag 1000 filters the scanner signal scanned during the scan timing through a signal filter step, and compares the filtered filter reception intensity to obtain the signal with the highest signal strength. 2000), and derives discrimination information including information related to device-specific information of the beacon scanner 2000. For example, referring to (c) of FIG. 14, the filter reception strength of a plurality of scanner signals received for the fifth time is the strongest filter reception strength of the beacon scanner 2000 received from the Ain beacon scanner 2000. In this case, it is determined that the location of the movable tag 1000 is close to Ain, and discrimination information can be derived.

15 schematically shows the form of data to be filtered according to the signal filtering step performed by the mobile tag 1000 according to an embodiment of the present invention.

Specifically, the mobile tag 1000 stores, for each scanner signal broadcast from each beacon scanner 2000, the filtered filter reception strength determined in the previous step, and the predictor variable determined in the previous step, and the current The filtered filter reception intensity and the predictor variable are updated based on the signal intensity of the scanner signal received in the step, the filtered filter reception intensity determined in the previous step, and the predictor variable determined in the previous step.

More specifically, the first filter step included in the signal filter step may derive the filter reception intensity based on the Kalman filter. The Kalman filter is a filter that calculates through predictors based on the most recent data values to derive new predicted values, and converts predictors back to predictors reflecting the predicted values. When the amount of data to be processed is not large , You can use the method of storing and calculating all the collected data and filtered data, but if the amount of data is massive and repetitive calculations are performed, the Kalman filter is used to predict the future value and the desired information without accumulating massive data. The effect of obtaining the optimum value of can be exhibited.

The mobile tag 1000 may update the filtered filter reception intensity and predictor variable based on the reception intensity of the scanner signal received in the current step, the filtered filter reception intensity determined in the previous step, and the predictor variable determined in the previous step.

15 shows a table for explaining the type of data filtered in the signal filtering step. As shown in (a) of FIG. 15, the filtered filter reception intensity determined in the previous step and the predictor variable determined in the previous step are stored. Thereafter, when the scanner signal a1 is received in the current step, the received scanner signal a1 is derived by filtering the signal strength of the scanner signal a1 to A1 based on the filtered signal strength A0 determined in the previous step and the predictor variable S0 determined in the previous step. do. The filtered currently received scanner signal A1 is again updated to the filtered signal strength determined in the previous step, and the predictor variable is also updated to S1 based on the signal strength A1 of the currently received scanner signal. Since the scanner signals are received simultaneously and multiple times, even when a plurality of scanner signals are received as shown in Fig. 15B, respectively, based on the filtered filter reception strength determined in the previous step and the predicted variable determined in the previous step, respectively. The scanner signal can be filtered and updated in real time.

In addition, according to an embodiment of the present invention, if the Kalman filter algorithm used in the signal filtering step is too old data, it may be determined that it is not valid and the step of deleting the corresponding data may be performed. As shown in (c) of FIG. 15, the data corresponding to the filtered filter reception strengths D0, F0, and H0 determined in the previous step have been updated by receiving a scanner signal compared to other data. The removable tag 1000 may determine that the data is invalid and delete the data. In this way, since a future value is predicted based on past data values in the signal filtering step, a more accurate predicted value can be derived by deleting invalid data. Without accumulating all of the past data, it is possible to exert the effect of deriving the desired result value based on the values of the past final data and the future predictor.

FIG. 16 schematically shows a graph showing a reception intensity filtered by a beacon signal received from the beacon scanner 2000 by the mobile tag 1000 according to an embodiment of the present invention.

Specifically, FIG. 16 shows a graph showing the signal strength of the scanner signal received from each transmission module of the two beacon scanners 2000 installed in both directions of the wall in which the movable tag 1000 is installed.

The mobile tag 1000 receives a plurality of scanner signals from the beacon scanner 2000. According to an embodiment of the present invention, the beacon scanner 2000 installed in both directions on the wall transmits a plurality of scanner signals through the first transmission module 2100 and the second transmission module 2200 of each beacon scanner 2000. Broadcast. At this time, when the scanner installed outside the door centered on the wall is referred to as the first beacon scanner 2000, and the scanner installed on the inner surface of the door is referred to as the second beacon scanner 2000, FIGS. A graph showing the value of the reception intensity obtained by filtering the scanner signal received from the first beacon scanner 2000 by the mobile tag 1000 through the execution of the first filter step is shown, and FIGS. 16C and 16D ) Shows a graph indicating the value of the reception intensity obtained by filtering the scanner signal received from the second beacon scanner 2000. The removable tag 1000 scans the scanner signal from the beacon scanner 2000 and filters all the scanned signals almost at the same time (precisely, at a very high speed after the scan) by performing a first filter step among the signal filter steps. As shown in FIG. 15, noise is removed from the first beacon signal that has passed through the first filter step, and data effective for determining the location information of the mobile tag 1000 is derived.

FIG. 17 is a schematic graph showing a sum value obtained by summing filtered signal intensity values derived by performing a signal filtering step by a mobile tag 1000 according to an embodiment of the present invention for each beacon scanner 2000 Shows.

FIG. 17 shows the signal strength of scanner signals transmitted from the first transmission module 2100 and the second transmission module 2200 of the same beacon scanner 2000, respectively, of the scanner signal that has passed the first filter step in the mobile tag 1000. A graph showing the sum of the values is shown. FIG. 17A is a graph showing the sum of the filter reception intensity of the scanner signal received from the first transmission module 2100 and the second transmission module 2200 of the first beacon scanner 2000. 17B is a graph showing the sum of the filter reception intensity of the scanner signal received from the first transmission module 2100 and the second transmission module 2200 of the second beacon scanner 2000 do. The mobile tag 1000 performs a second filter step of summing the scanner signals received from the same beacon scanner 2000 based on the filter reception intensity filtered through the first filter step. According to the execution of the second filter step of the removable tag 1000, a scanner signal received from the first transmission module 2100 and the second transmission module 2200 of each beacon scanner 2000 as shown in FIG. 17 The filter reception intensity of is summed up. The finally derived summed filter reception intensity becomes a basis for determining the location information of the movable tag 1000 after that.

18 is a sum value of the filtered filter reception intensity of the first beacon scanner 2000 and the second beacon scanner 2000 derived according to the execution of the signal filtering step of the mobile tag 1000 according to an embodiment of the present invention. It schematically shows a graph indicating.

The mobile tag 1000 obtained by summing the scanner signals received from the transmission module of each beacon scanner 2000 through the second filter step is the beacon scanner 2000 that is closest to itself according to the sum of the derived filtered reception intensities. ) Is determined. As shown in FIG. 18, the sum of the filter reception strengths of the first beacon scanner 2000 installed outside the door is lower than the sum of the filter reception strengths of the second beacon scanner 2000 installed inside the door. At some point, the sum of the filter reception strengths of the first beacon scanner 2000 is higher than the sum of the filter reception strengths of the second beacon scanner 2000. Based on this, the movable tag 1000 determines that it has advanced from the inside position of the door to the outside of the door. Thereafter, the sum of the filter reception strengths of the second beacon scanner 2000 continues to be lower than the sum of the filter reception strengths of the first beacon scanner 2000, and then the second beacon scanner 2000 receives the filter again at some point. The sum of the strengths is higher than the sum of the filter reception strengths of the first beacon scanner 2000. Based on this, the movable tag 1000 may determine that the door has entered the inside of the door from the outside position. The identification information derived in this way is transmitted to the beacon scanner 2000 together with the tag-specific information of the mobile tag 1000, and is the basis for determining the location information of the mobile tag 1000 in the service server 3000. The service server 3000 determines the entry and exit of the mobile tag 1000 based on information on the result value obtained by filtering from the mobile tag 1000, thereby reducing the overload of data processing. .

An embodiment of the present invention may also be implemented in the form of a recording medium including instructions executable by a computer, such as a program module executed by a computer. Computer-readable media can be any available media that can be accessed by a computer, and includes both volatile and nonvolatile media, removable and non-removable media. Further, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transmission mechanism, and includes any information delivery media.

Although the methods and systems of the present invention have been described in connection with specific embodiments, some or all of their components or operations may be implemented using a computer system having a general-purpose hardware architecture.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

Claims (5)

As a system for determining the location of a wireless signal-based mobile tag,
A plurality of beacon scanners for broadcasting a scanner signal including device-specific information;
Including; a mobile tag for receiving a plurality of the scanner signals from a plurality of beacon scanners, and broadcasting a second beacon signal based on the reception strength of the plurality of the scanner signals,
The second beacon signal includes identification information related to at least one device-specific information among a plurality of beacon scanners, and tag-specific information of the mobile tag.
The method according to claim 1,
The identification information includes information related to device-specific information of a beacon scanner that has transmitted a scanner signal having the highest reception strength from the mobile tag among a plurality of scanner signals.
The method according to claim 1,
The removable tag,
A signal collection step of collecting scanner signals transmitted from the plurality of beacon scanners;
A signal filtering step of deriving a filter reception intensity filtered by a predetermined method with respect to the reception intensity of the collected scanner signal;
A discrimination step of deriving discrimination information related to at least one or more device-specific information among the plurality of beacon scanners based on a plurality of filter reception intensities of the scanner signals of the plurality of beacon scanners; And
A system for determining a location of a wireless signal-based mobile tag to perform a broadcasting step of broadcasting the second beacon signal.
The method according to claim 1,
The removable tag,
For each scanner signal received from each beacon scanner, the filtered filter reception strength determined in the previous step and the predictor variable determined in the previous step are stored,
The signal strength of the scanner signal received in the current step, the filtered filter reception strength determined in the previous step, and the filtered filter reception intensity and the predictor variable based on the predicted variable determined in the previous step are updated. System to determine location.
The method according to claim 1,
The beacon scanner transmits the location information of the mobile tag derived based on the second beacon information received from the mobile tag to a service server.

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