WO2023140656A1

WO2023140656A1 - Electronic device for detecting location by using geomagnetic data, and control method therefor

Info

Publication number: WO2023140656A1
Application number: PCT/KR2023/000967
Authority: WO
Inventors: 이영포; 김태윤; 우준영; 이형건; 임채만
Original assignee: 삼성전자 주식회사
Priority date: 2022-01-24
Filing date: 2023-01-19
Publication date: 2023-07-27

Abstract

Disclosed are an electronic device for detecting a location by using geomagnetic data, and a control method therefor. The electronic device for detecting a location by using geomagnetic data, according to one embodiment of the present document, comprises a geomagnetic sensing module, memory, and at least one processor, wherein the at least one processor may be configured to: acquire, from the geomagnetic sensing module, first geomagnetic data for a first area sensed by using the geomagnetic sensing module; model the acquired first geomagnetic data into a polynomial determined on the basis of an attribute of the first area; configure at least one second area to which the modeled polynomial will be applied; estimate a plurality of geomagnetic patterns for the at least one second area by using the modeled polynomial; perform, for each of the plurality of estimated geomagnetic patterns, a calculation for correcting an angle error related to the moving direction of the electronic device, in order to acquire a plurality of reference geomagnetic patterns and store same in the memory; and determine whether the electronic device is located in the first area, on the basis of a statistical value determined by using the plurality of acquired reference geomagnetic patterns.

Description

Electronic device for detecting location using geomagnetic data and control method thereof

This document relates to an electronic device for detecting a location using geomagnetic data and a method for controlling the same.

Various services and additional functions provided through electronic devices, for example, portable electronic devices such as smart phones, are gradually increasing. In order to increase the utility value of these electronic devices and satisfy the needs of various users, communication service providers or electronic device manufacturers are competitively developing electronic devices to provide various functions and to differentiate themselves from other companies. Accordingly, various functions provided through electronic devices are becoming increasingly sophisticated.

An electronic device (eg, a smart phone) may identify a current location of the electronic device using geomagnetic data sensed by a sensor module (eg, a geomagnetic sensing module). For example, the electronic device may determine whether the electronic device is located in a specific area or place by comparing a geomagnetic pattern stored in the electronic device with sensed geomagnetic data (eg, a geomagnetic pattern). However, in a space with a relatively large change in indoor structure (eg, inside a house), a geomagnetic pattern may change even if a small deviation occurs in a movement line of an electronic device. Also, even if the user of the electronic device moves to the same place, the sensed geomagnetic pattern may change according to the user's moving speed. Also, even if a user of the electronic device moves to the same place, the sensed geomagnetic pattern may change according to an angular error generated in a process of aligning coordinate axes to determine whether the electronic device is located in a specific region or place.

According to an embodiment of the present document, an electronic device capable of providing an improved positioning function by determining whether an electronic device is located in a specific area or place using at least one geomagnetic pattern predicted based on a movement line deviation, movement speed, and angle error of a user of the electronic device is disclosed.

According to an embodiment of the present document, a control method of an electronic device capable of providing an improved positioning function by determining whether an electronic device is located in a specific area or place using at least one geomagnetic pattern predicted based on a movement line deviation, movement speed, and angle error of a user of the electronic device is disclosed.

An electronic device according to an embodiment of the present document includes a geomagnetic sensing module, a memory, and at least one processor, wherein the at least one processor obtains first geomagnetic data for a first region sensed using the geomagnetic sensing module from the geomagnetic sensing module, models the obtained first geomagnetic data with a polynomial determined based on attributes of the first region, sets at least one second region to which the modeled polynomial is applied, and sets the at least one second region to which the modeled polynomial is applied. A plurality of geomagnetic patterns for the second area may be estimated using the modeled polynomial, and for each of the plurality of estimated geomagnetic patterns, an operation for correcting an angular error related to a moving direction of the electronic device may be performed to obtain a plurality of reference geomagnetic patterns, store them in the memory, and determine whether the electronic device is located in the first area based on a statistical value determined using the obtained plurality of reference geomagnetic patterns.

A method for controlling an electronic device according to an embodiment of the present document includes obtaining first geomagnetic data for a first region sensed using a geomagnetic sensing module of the electronic device from the geomagnetic sensing module, modeling the obtained first geomagnetic data with a polynomial determined based on attributes of the first region, setting at least one second region to which the modeled polynomial is applied, and modeling a plurality of geomagnetic patterns for the at least one second region. The method may include a process of estimating using the obtained polynomial, a process of obtaining and storing a plurality of reference geomagnetic patterns in a memory of the electronic device by performing an operation to correct an angular error related to a moving direction of the electronic device for each of the plurality of estimated geomagnetic patterns, and a process of determining whether the electronic device is located in the first region based on a statistical value determined using the obtained plurality of geomagnetic patterns.

According to an embodiment of the present document, an electronic device capable of providing an improved positioning function by determining whether an electronic device is located in a specific region or place using at least one geomagnetic pattern predicted based on movement line deviation, movement speed, and angular error of the electronic device may be disclosed.

Effects according to various embodiments are not limited to the effects described above, and it is obvious to those skilled in the art that various effects are inherent in the present disclosure.

1 is a block diagram of an electronic device in a network environment according to various embodiments of the present document.

2 is an exemplary diagram for explaining a function or operation of detecting a location of an electronic device using a geomagnetic pattern.

3 and 4 are exemplary diagrams for explaining a phenomenon in which different geomagnetic patterns are obtained according to movement line deviations.

5 is an exemplary diagram for explaining a phenomenon in which different geomagnetic patterns are acquired according to the moving speed of an electronic device.

6 is an exemplary diagram for explaining a phenomenon in which a geomagnetic pattern distorted according to an angle error is obtained.

7 is an exemplary diagram for explaining a function or operation of determining whether an electronic device is located in a specific area or place using at least one geomagnetic pattern predicted based on a movement line deviation, a movement speed, and an angular error of the electronic device according to an embodiment of the present document.

8 is an exemplary diagram for explaining a function or operation of setting coordinates of a specific area by an electronic device according to an embodiment of the present document.

9 is an exemplary diagram for explaining a result of predicting a geomagnetic pattern for a specific axis (eg, X axis) set for the electronic device using geomagnetic data modeled by a specific polynomial by the electronic device according to an embodiment of the present document.

10 is an exemplary diagram for explaining a function or operation of determining a second area by expanding a first area in order to compensate for an error due to a user's movement line deviation, by an electronic device according to an embodiment of the present document.

FIG. 11 is an exemplary diagram for explaining a function or operation of determining a second area by extending the i-axis and the j-axis (e.g., the same axis as the user's movement direction) of the first area in order to compensate for an error that occurs when the user's moving speed is relatively faster than the moving speed at the time when geomagnetic data is acquired by the electronic device according to an embodiment of the present document.

12 is an exemplary diagram for explaining a function or operation of determining a second area by reducing the j-axis (eg, the same axis as the user's movement direction) of the first area in order to compensate for an error that occurs when the user's moving speed is relatively slower than the user's moving speed at the time geomagnetic data is acquired, according to an embodiment of the present document.

13 and 14 are exemplary diagrams for explaining a function or operation of obtaining a geomagnetic pattern according to a predetermined interval (i _bias ) with respect to the i-axis of the second area by the electronic device according to an embodiment of the present document.

15 is an exemplary diagram for explaining an angular error according to an embodiment of the present document.

16 is an exemplary diagram for explaining a function or operation of applying at least one angular value included in a predetermined angular range to an obtained geomagnetic pattern in order to compensate for an angular error (eg, to obtain a geomagnetic pattern to which the angular error is applied) by an electronic device according to an embodiment of the present document.

FIG. 17 is an exemplary view for explaining a function or operation of an electronic device according to an embodiment of the present document determining a similarity (eg, a statistical value) between a plurality of geomagnetic patterns (eg, a plurality of reference geomagnetic patterns) for which angular errors are compensated for and a predetermined representative geomagnetic pattern, and determining whether the electronic device has entered or exited a specific area (eg, a first area) based on the determined similarity.

18 and 19 are a function of determining whether an electronic device has entered or exited a specific area (eg, a first area) by determining at least one geomagnetic pattern as a representative geomagnetic pattern among a plurality of geomagnetic patterns (eg, a plurality of reference geomagnetic patterns) to which an angle error is compensated for (eg, an angle error is applied), and comparing obtained geomagnetic data (eg, the geomagnetic pattern) with the at least one representative geomagnetic pattern according to an embodiment of the present document. Or, they are exemplary drawings for explaining the operation.

1 is a block diagram of an electronic device 101 within a network environment 100, according to various embodiments. Referring to FIG. 1 , in a network environment 100, an electronic device 101 may communicate with the electronic device 102 through a first network 198 (eg, a short-distance wireless communication network), or may communicate with at least one of the electronic device 104 and the server 108 through a second network 199 (eg, a long-distance wireless communication network). According to one embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120, a memory 130, an input module 150, a sound output module 155, a display module 160, an audio module 170, a sensor module 176, an interface 177, a connection terminal 178, a haptic module 179, a camera module 180, a power management module 188, a battery 189, a communication module ( 190), a subscriber identification module 196, or an antenna module 197. In some embodiments, in the electronic device 101, at least one of these components (eg, the connection terminal 178) may be omitted or one or more other components may be added. In some embodiments, some of these components (eg, sensor module 176, camera module 180, or antenna module 197) may be integrated into one component (eg, display module 160).

The processor 120 may, for example, execute software (eg, program 140) to control at least one other component (eg, hardware or software component) of the electronic device 101 connected to the processor 120, and may perform various data processing or calculations. According to one embodiment, as at least part of data processing or operation, processor 120 may store commands or data received from other components (e.g., sensor module 176 or communication module 190) in volatile memory 132, process the commands or data stored in volatile memory 132, and store resultant data in non-volatile memory 134. According to one embodiment, the processor 120 may include a main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that may operate independently or together with the main processor 121. For example, when the electronic device 101 includes the main processor 121 and the auxiliary processor 123, the auxiliary processor 123 may use less power than the main processor 121 or may be set to be specialized for a designated function. The secondary processor 123 may be implemented separately from or as part of the main processor 121 .

The auxiliary processor 123 functions related to at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) along with the main processor 121 while the main processor 121 is in an active (eg, application execution) state or instead of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state. Alternatively, at least some of the states may be controlled. According to one embodiment, the auxiliary processor 123 (eg, an image signal processor or a communication processor) may be implemented as a part of other functionally related components (eg, the camera module 180 or the communication module 190). According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. AI models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself where the artificial intelligence model is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the above examples. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-networks, or a combination of two or more of the above, but is not limited to the above examples. The artificial intelligence model may include, in addition or alternatively, software structures in addition to hardware structures.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, program 140) and commands related thereto. The memory 130 may include volatile memory 132 or non-volatile memory 134 .

The program 140 may be stored as software in the memory 130 and may include, for example, an operating system 142 , middleware 144 , or an application 146 .

The input module 150 may receive a command or data to be used by a component (eg, the processor 120) of the electronic device 101 from the outside of the electronic device 101 (eg, a user). The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output sound signals to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. A receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

The display module 160 may visually provide information to the outside of the electronic device 101 (eg, a user). The display module 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module 160 may include a touch sensor set to detect a touch or a pressure sensor set to measure the intensity of force generated by the touch.

The audio module 170 may convert sound into an electrical signal or vice versa. According to an embodiment, the audio module 170 may obtain sound through the input module 150, output sound through the sound output module 155, or an external electronic device (e.g., electronic device 102) (e.g., speaker or headphone) connected directly or wirelessly to the electronic device 101.

The sensor module 176 may detect an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, a user state), and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a bio sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 177 may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device 101 to an external electronic device (eg, the electronic device 102). According to one embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (eg, the electronic device 102). According to one embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert electrical signals into mechanical stimuli (eg, vibration or motion) or electrical stimuli that a user may perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101 . According to one embodiment, the power management module 188 may be implemented as at least part of a power management integrated circuit (PMIC), for example.

The battery 189 may supply power to at least one component of the electronic device 101 . According to one embodiment, the battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 may support establishment of a direct (e.g., wired) communication channel or wireless communication channel between the electronic device 101 and an external electronic device (e.g., the electronic device 102, the electronic device 104, or the server 108), and communication through the established communication channel. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to one embodiment, the communication module 190 may include a wireless communication module 192 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, a local area network (LAN) communication module or a power line communication module). A corresponding communication module among these communication modules may communicate with the external electronic device 104 through a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or an infrared data association (IrDA)) or a second network 199 (eg, a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a long-distance communication network such as a computer network (eg, a LAN or a WAN)). These various types of communication modules may be integrated as one component (eg, a single chip) or implemented as a plurality of separate components (eg, multiple chips). The wireless communication module 192 may identify or authenticate the electronic device 101 within a communication network such as the first network 198 or the second network 199 using subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196.

The wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, NR access technology (new radio access technology). NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and access to multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module 192 may support a high frequency band (eg, mmWave band) to achieve a high data rate, for example. The wireless communication module 192 may support various technologies for securing performance in a high frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module 192 may support various requirements defined for the electronic device 101, an external electronic device (eg, the electronic device 104), or a network system (eg, the second network 199). According to an embodiment, the wireless communication module 192 may support peak data rate (eg, 20 Gbps or more) for eMBB realization, loss coverage (eg, 164 dB or less) for mMTC realization, or U-plane latency (eg, downlink (DL) and uplink (UL) 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

The antenna module 197 may transmit or receive signals or power to the outside (eg, an external electronic device). According to one embodiment, the antenna module 197 may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (eg, PCB). According to one embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 may be selected from the plurality of antennas by, for example, the communication module 190. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module 197 in addition to the radiator.

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (eg, bottom surface) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band), and a plurality of antennas (eg, array antennas) disposed on or adjacent to a second surface (eg, top surface or side surface) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.

At least some of the components are connected to each other through a communication method between peripheral devices (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signals (e.g., commands or data) can be exchanged with each other.

According to an embodiment, commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external

electronic devices

102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or part of operations executed in the electronic device 101 may be executed in one or more external electronic devices among the external

electronic devices

102 , 104 , or 108 . For example, when the electronic device 101 needs to automatically perform a certain function or service or in response to a request from a user or another device, the electronic device 101 may request one or more external electronic devices to perform the function or at least part of the service, instead of or in addition to executing the function or service by itself. One or more external electronic devices receiving the request may execute at least a part of the requested function or service or an additional function or service related to the request, and deliver the execution result to the electronic device 101 . The electronic device 101 may provide the result as at least part of a response to the request as it is or additionally processed. To this end, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an internet of things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199 . The electronic device 101 may be applied to intelligent services (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

2 is an exemplary diagram for explaining a function or operation of the electronic device 101 detecting a position of the electronic device 101 using a geomagnetic pattern.

Referring to FIG. 2 , the electronic device 101 according to an embodiment of the present document compares a plurality of geomagnetic patterns 210 previously stored in the electronic device 101 with geomagnetic patterns 220 sequentially obtained as the electronic device 101 moves, and determines whether the electronic device 101 has entered or exited a specific area (eg, a first area). The plurality of geomagnetic patterns 210 stored in advance in FIG. 2 may include a geomagnetic pattern (Mx, 210a) on the X axis, a geomagnetic pattern (My, 210b) on the Y axis, and a geomagnetic pattern (Mz, 210c) on the Z axis, which are previously obtained for a specific region (eg, the first region). The electronic device 101 according to an embodiment of the present document may determine whether the electronic device 101 has entered or exited a specific area (e.g., the first area 310) based on whether the plurality of geomagnetic patterns 210 stored in advance and the geomagnetic patterns 220 sequentially obtained as the electronic device 101 moves substantially match. In FIG. 2 , for example, since a plurality of geomagnetic patterns 210 stored in advance between

indices

6 and 7 representing the moving distance of the electronic device 101 and geomagnetic patterns 220 sequentially acquired according to the movement of the electronic device 101 substantially coincide, the electronic device 101 can determine that the user carrying the electronic device has passed through a specific area through such a geomagnetic pattern analysis. However, when a small deviation occurs in a user's movement line in a narrow space such as a house where the change in indoor structure is large, the geomagnetic pattern may greatly change. This will be described in more detail with reference to FIGS. 3 and 4 .

In FIG. 3 , three straight copper lines (eg, the first copper wire 312, the second copper wire 314, and the third copper wire 316) each having an interval of about 25 cm, and the X-axis geomagnetic patterns Mx (eg, the first geomagnetic pattern 312a) corresponding to the respective copper wires (eg, the first copper wire 312, the second copper wire 314, and the third copper wire 316) ), the second geomagnetic pattern 314a, and the third geomagnetic pattern 316a) are shown as examples. In FIG. 4 , a diagram representing geomagnetic data obtained in a specific area (eg, the first area 310 ) in a 3D space is shown as an example. The horizontal axis and the vertical axis of the spatial coordinates of FIG. 4 represent coordinates or distances (eg, meters) of a specific area, respectively, and the height may represent geomagnetic data about the X-axis among the coordinate axes of the electronic device 101 . Accordingly, in FIG. 4 , it is shown that geomagnetic data on the X-axis is obtained for a specific region having a horizontal length of 50 cm and a vertical length of 1 m. As shown in FIGS. 3 and 4 , in a space with a large change in indoor structure, when the location of a user's movement path carrying the electronic device 101 is changed (e.g., when the first flow path 312 is changed to the second flow path 314), the geomagnetic pattern may change significantly (e.g., exceeding a predetermined threshold value for similarity of the geomagnetic pattern). Such a phenomenon may occur not only in an environment with a complicated indoor structure but also in an indoor space in which a large number of strong magnetic materials are disposed. Referring to FIG. 4 , it can be confirmed that the geomagnetic value can be greatly changed even in a narrow area having a width of about 50 cm. In such an environment, when pre-stored geomagnetic data (e.g., a geomagnetic pattern) is used for positioning of the electronic device 101, accurate position detection of the electronic device 101 may not be performed due to a change in the geomagnetic pattern that may occur according to a deviation of the movement line. In addition, even if the user moves (eg, passes) the same area, the geomagnetic pattern obtained in a specific area (eg, the first area 310) may differ from the previously stored geomagnetic pattern according to the moving speed of the user carrying the electronic device 101. This will be described in more detail with reference to FIG. 5 .

5 is an exemplary diagram for explaining a phenomenon in which different geomagnetic patterns are obtained according to the moving speed of the electronic device 101 . In FIG. 5 , when users carrying the electronic device 101 move in a specific area at different moving speeds, a case in which different geomagnetic patterns to be compared are obtained is illustrated as an example. The electronic device 101 according to an embodiment of the present document may sample the acquired geomagnetic data at regular time intervals and use it for position detection. Therefore, when the user carrying the electronic device 101 moves relatively fast (510) (eg, moving at a moving speed faster than the moving speed at the time of acquiring the reference geomagnetic pattern (eg, pre-stored geomagnetic pattern) used for position detection), compared to the case of moving relatively slowly (520) (eg, moving at a moving speed slower than the moving speed at the time of acquiring the reference geomagnetic pattern (eg, pre-stored geomagnetic pattern) used for position detection), the user has the same You may travel longer distances over time. Accordingly, even though the electronic device 101 passes through the same area, the electronic device 101 according to an embodiment of the present document acquires a pattern substantially different from a reference geomagnetic pattern (e.g., a pre-stored geomagnetic pattern) used for position detection as a geomagnetic pattern to be compared, and thus, accurate position detection of the electronic device 101 may not be performed. In addition, even if a user carrying the electronic device 101 moves to the same location, the waveform of the geomagnetic pattern acquired in a specific area (eg, the first area 310) may be distorted according to the user's action. This will be described in more detail with reference to FIG. 6 .

6 is an exemplary diagram for explaining a phenomenon in which a geomagnetic pattern distorted according to an angle error is obtained. As described above, the waveform of the geomagnetic pattern acquired in a specific area (eg, the first area 310) may be distorted according to the user's behavior while carrying the electronic device 101 . For example, the user behavior may include various examples, such as when the user moves while viewing the screen of the electronic device 101, unlike when the user acquires the reference geomagnetic pattern used for location detection, when the user carries the electronic device 101 in his hand and walks naturally, when the user puts the electronic device 101 in his pocket and walks. If there is such a user's action on the electronic device 101, the coordinate axis at the point in time at which geomagnetic data to be compared is acquired and the coordinate axis at the point at which geomagnetic data is pre-collected in a specific area (e.g., the first area 310) may not be aligned with each other. The electronic device 101 according to an embodiment of the present document may estimate the orientation of the electronic device 101 according to each user's action, and align the coordinate axis of the obtained geomagnetic data (e.g., comparison object geomagnetic data) with the coordinate axis of the previously obtained geomagnetic data. For example, the electronic device 101 according to an embodiment of the present document may estimate a horizontal movement direction (eg, yaw) of a user carrying the electronic device 101 and an orientation (eg, pitch and roll) of the electronic device 101. The electronic device 101 according to an embodiment of the present document may identify an angular difference between a coordinate axis according to the estimated horizontal movement direction and the direction of the electronic device 101 and a coordinate axis of the obtained geomagnetic data to be compared. The electronic device 101 according to an embodiment of the present document may align the coordinate axes by applying the identified angular difference to the obtained geomagnetic data to be compared (eg, applying a rotation transformation matrix). However, there may be an error (eg, an angle error) between the estimated moving direction of the electronic device 101 and the actual moving direction of the electronic device 101 . Accordingly, even though the electronic device 101 passes through the same specific area (e.g., the first area 310), a pattern substantially different from a reference geomagnetic pattern (e.g., a pre-stored geomagnetic pattern) used for position detection is obtained as a geomagnetic pattern to be compared, and thus, accurate position detection of the electronic device 101 may not be performed. In FIG. 6, a case in which a geomagnetic pattern 620 (e.g., a decrease pattern) obtained when an angular error does not occur shows a pattern that substantially matches the pre-stored geomagnetic pattern 610, but a geomagnetic pattern 620 (e.g., a cubic function pattern) obtained when an angular error (e.g., -18 degrees) occurs is distorted and obtained in a pattern different from the substantially pre-stored geomagnetic pattern 610.

7 is an exemplary diagram for explaining a function or operation of determining whether an electronic device 101 is located in a specific area or place using at least one geomagnetic pattern predicted based on movement line deviation, movement speed, and angular error of the electronic device 101 according to an embodiment of the present document.

Referring to FIG. 7 , the electronic device 101 (eg, the processor 120) according to an embodiment of the present document may, in operation 710, acquire geomagnetic data for the first region 310 sensed using the sensor module 176 (eg, the geomagnetic sensing module) from the sensor module 176. Geomagnetic data according to an embodiment of the present document may be expressed in a space of [0, T] as a time axis and [0, M _max ] as a magnetic field axis, as shown in Equation 1 below. Here, M _max may mean the maximum value of the measurable magnetic field, and T may mean the measurement time of the geomagnetic field.

The electronic device 101 according to an embodiment of the present document may store coordinate data i and j of a specific area (eg, the first area 310) determined using augmented reality (AR) technology or a sensor (eg, the camera module 180) in the electronic device 101 together with geomagnetic data. Geomagnetic data and coordinate data stored in the electronic device 101 according to an embodiment of the present document may be expressed by Equation 2 below. Here, the coordinate data i and j may be relative coordinates set with respect to a space identified through a space recognition technology such as an augmented reality technology. 8 is an exemplary diagram for explaining a function or operation of setting coordinates of a specific area by an electronic device according to an embodiment of the present document. As shown in FIG. 8 , the electronic device 101 according to an embodiment of the present document may determine coordinate data based on the movement direction of the electronic device 101 . For example, the electronic device 101 according to an embodiment of the present document may set a direction substantially parallel to the moving direction of the electronic device 101 as the j-axis, and may set a direction substantially perpendicular to the moving direction of the electronic device 101 as the i-axis. Although not shown, the electronic device 101 according to an embodiment of the present document may set the lower left portion of the first area 310 to (0,0) and set coordinate values to correspond to the horizontal and vertical lengths of the first area 310.

In operation 720, the electronic device 101 according to an embodiment of the present document may model the data obtained according to operation 710 as a polynomial determined based on the attribute of the first area 310. The electronic device 101 according to an embodiment of the present document may determine the degree of the polynomial according to the length of the axis of the first region 310 (eg, the length of the y-axis). The electronic device 101 according to an embodiment of the present document may store a look-up table in which a relationship between the property of the first area 310 (eg, the length of the y-axis of the first area 310) and the degree of the polynomial is defined so that the polynomial can be determined based on the property of the first area 310. The electronic device 101 according to an embodiment of the present document may determine a polynomial by referring to such a lookup table. According to another embodiment of the present document, the degree of the polynomial may be previously designated regardless of the property of the first area 310 . The electronic device 101 according to an embodiment of the present document may derive polynomial coefficients (eg, a _x , b _x,..., l _x, a _y , b _y,..., l _y, a _z , b _z,..., l _z ) through a curve fitting process. For example, when geomagnetic data (eg, geomagnetic data (M _x (i,j)) on the x-axis) for a specific region having a side length of 1 m is modeled with a specific polynomial (eg, 3rd order polynomial), it may be modeled (eg, expressed) as shown in Equation 3 below. Similarly, the geomagnetic data (M _y (i,j)) on the y-axis and the geomagnetic data (M _z (i,j)) on the z-axis are respectively It can be modeled as Equation 4 and Equation 5.

The electronic device 101 according to an embodiment of the present document may determine a value of a coefficient (eg, a _x ) of an equation by applying various regression algorithms such as Lasso and/or Ridge. According to an embodiment of the present document, geomagnetic data modeled by a specific polynomial (eg, Equation 3) may be patterned, estimated (eg, predicted), and expressed as shown in FIG. 9 .

In operation 730, the electronic device 101 according to an embodiment of the present document sets at least one second region 310a to which the modeled polynomial is applied, and estimates a plurality of geomagnetic patterns for the at least one second region 310a using the modeled polynomial. The electronic device 101 according to an embodiment of the present document may enlarge (eg, increase) the size (eg, horizontal length) of the first region 310 according to a predetermined ratio. 10 exemplarily illustrates an embodiment in which the electronic device 101 increases the horizontal length of the first region 310 according to a predetermined ratio (eg, a margin) according to an embodiment of the present document. The electronic device 101 according to an embodiment of the present document may set the lower left point 1010 of the second area 310a as a new origin point (eg, (0,0)). Alternatively, according to another embodiment of this document, the original origin may be maintained without setting the lower left point 1010 of the second region 310a as a new origin (eg, (0,0)). Through the function or operation shown in FIG. 10 , for example, the function or operation of setting the second area 310a by enlarging (eg, increasing) the size (eg, horizontal length) of the first area 310, even if the user carrying the electronic device 101 moves out of the specific area (eg, the first area 310) by a slight difference, the electronic device 101 enters the specific area (eg, the first area 310) or enters the specific area (eg, the first area 310). : It may be determined that the user has advanced from the first area 310). Therefore, according to such a function or operation, an error due to a user's movement line deviation (e.g., when the user moves along a movement line close to the first area 310 (e.g., 3 cm away from the boundary of the first area 310)) is compensated (e.g., it is determined that the user has passed through the first area 310), and thus the accuracy of location detection by the electronic device 101 according to an embodiment of the present document can be improved.

11 is an exemplary diagram for explaining a function or operation of determining a second region 310a by extending the i-axis and the j-axis (eg, the same axis as the user's movement direction) of the first region 310 in order to compensate for an error that occurs when the user's movement speed is relatively faster than the movement speed at the time geomagnetic data is obtained, according to an embodiment of the present document. The electronic device 101 according to an embodiment of the present document, when a user carrying the electronic device 101 moves relatively fast, compensates for an error (eg, when a different geomagnetic pattern is obtained even though a geomagnetic pattern that is different from a previously stored geomagnetic pattern is obtained) according to a moving speed, as illustrated in FIG. 11 exemplarily as shown in FIG. ) can be increased both in the horizontal length and in the vertical length. In FIG. 11, an embodiment in which the “margin” mentioned in relation to FIG. 10 is applied to the i-axis is exemplarily shown. According to another embodiment of the present document, the electronic device 101 may increase only the length of the j-axis of the first region 310 . The electronic device 101 according to an embodiment of the present document, when a user carrying the electronic device 101 moves relatively slowly, compensates for an error (eg, when different geomagnetic patterns are acquired even though passing through the same first area 310) according to the movement speed (eg, it is determined that the user has passed through the first area 310 even if a pattern different from a previously stored geomagnetic pattern is acquired), as exemplarily shown in FIG. 12 , in the first area 310 . ) can reduce the length of the j-axis. In FIG. 12, an embodiment in which the “margin” mentioned in relation to FIG. 10 is applied to the i-axis is exemplarily shown. According to another embodiment of the present document, the electronic device 101 may reduce only the length of the j-axis of the first region 310 . The electronic device 101 according to an embodiment of the present document may set the lower left point 1010 of the second area 310a as a new origin point (eg, (0,0)). Alternatively, according to another embodiment of this document, the original origin may be maintained without setting the lower left point 1010 of the second region 310a as a new origin (eg, (0,0)).

13 and 14 are exemplary diagrams for explaining a function or operation in which the electronic device 101 according to an embodiment of the present document obtains a geomagnetic pattern according to an interval (i _bias ) designated in advance or set by a user with respect to the i-axis of the second region 310a. The electronic device 101 according to an embodiment of the present document includes a plurality of geomagnetic patterns (eg, a fourth geomagnetic pattern 1321, a fifth geomagnetic pattern 1322, a sixth geomagnetic pattern 1323, a seventh geomagnetic pattern 1324, an eighth geomagnetic pattern 1325, a ninth geomagnetic pattern 1326, and a tenth geomagnetic pattern for the second region 310a. The pattern 1327, the eleventh geomagnetic pattern 1328, and the twelfth geomagnetic pattern 1329 may be estimated (eg, acquired) using (eg, based on) the modeled polynomial. The electronic device 101 according to an embodiment of the present document may estimate a geomagnetic pattern according to a specific interval (i _bias ). The electronic device 101 according to an embodiment of the present document determines a specific interval (i _bias ) according to Equation 6 below, and acquires (eg, estimates) a geomagnetic pattern according to the modeled polynomials according to the specific interval (i _bias ) according to operation 720. For example, the electronic device 101 according to an embodiment of the present document may obtain a geomagnetic pattern in the second region 310a according to

Equations

7, 8, and 9 below. In Equation 6 below, N may mean the number of geomagnetic patterns to be obtained, and may be pre-specified or set by a user. In addition, Equations 7 to 9 may satisfy the condition of Equation 10 below, and n in Equations 7 to 9 may mean a natural number satisfying 0 to N-1. In addition, Equations 6 to 9

and

may be the coordinates of the upper right point 1310 of the second area 310a. Also, in Equations 7 to 9,

can be

In operation 740, the electronic device 101 according to an embodiment of the present document may obtain a plurality of reference geomagnetic patterns by performing an operation to compensate for an angle error 1510 for each of a plurality of estimated geomagnetic patterns. 15 is an example diagram for explaining an angular error 1510 (eg, an angular error with respect to a user's horizontal movement direction) according to an embodiment of the present document. As described above, the angular error 1510 according to an embodiment of the present document may mean a difference between an actual user's movement direction (eg, the user's horizontal movement direction and the orientation of the electronic device 101) and the user's movement direction estimated by the electronic device 101. According to an embodiment of the present document, the angle error 1510 is an angle error according to the user's horizontal movement direction and an angle error according to the orientation of the electronic device 101, and a total of two types of angle errors may be generated. The electronic device 101 according to an embodiment of the present document converts both types of angular errors 1510 into a plurality of geomagnetic patterns (eg, the fourth geomagnetic pattern 1321, the fifth geomagnetic pattern 1322, the sixth geomagnetic pattern 1323, the seventh geomagnetic pattern 1324, the eighth geomagnetic pattern 1325, the ninth geomagnetic pattern 1326, and the first geomagnetic pattern 1326). It can be applied to the 0 geomagnetic pattern 1327, the 11th geomagnetic pattern 1328, and the 12th geomagnetic pattern 1329) (e.g., sequentially applying a rotation transformation matrix including two types of angular error values (e.g., 5˚ and -5˚) to each of a plurality of geomagnetic patterns). Alternatively, the electronic device 101 according to an embodiment of the present document may apply only one type of angular error 1510 among two types of angular errors (eg, apply a rotation transformation matrix including a specific angular error value (eg, 5°) to each of a plurality of geomagnetic patterns). Alternatively, the electronic device 101 according to an embodiment of the present document may apply a specific angular error value included in an angular error range modeled to cover two types of angular error ranges (e.g., apply a rotation transformation matrix including a specific angular error value (e.g., 3°) included in an empirically predetermined angular range (e.g., -10° to 10°) to each of a plurality of geomagnetic patterns). In this case, according to an embodiment of the present document, the modeled angular error range may be expressed according to Equation 11 below. In Equation 11, θ may mean an angular error, θ _min may mean a minimum value of an angular range, and θ _max may mean a maximum value of an angular range.

The electronic device 101 according to an embodiment of the present document converts at least one angular error value included in the angular error range shown in Equation 11 into a plurality of geomagnetic patterns (eg, the fourth geomagnetic pattern 1321, the fifth geomagnetic pattern 1322, the sixth geomagnetic pattern 1323, the seventh geomagnetic pattern 1324, the eighth geomagnetic pattern 1325, and the ninth geomagnetic pattern 13). 26), the 10th geomagnetic pattern 1327, the 11th geomagnetic pattern 1328, and the 12th geomagnetic pattern 1329). For example, in the electronic device 101 according to an embodiment of the present document, θ _min andM number of angular error values may be determined at equal intervals between θ _max . In this case, as shown in FIG. 16, M×N geomagnetic patterns can be obtained. 16 is an exemplary diagram for explaining a function or operation of applying at least one angular error value included in a predetermined angular range to an obtained geomagnetic pattern in order to compensate for an angular error (eg, to obtain a geomagnetic pattern to which the angular error is applied) by the electronic device 101 according to an embodiment of the present document. 16, a plurality of geomagnetic patterns (e.g., a fourth geomagnetic pattern 1321, a fifth geomagnetic pattern 1322, a sixth geomagnetic pattern 1323, a seventh geomagnetic pattern 1324, an eighth geomagnetic pattern 1325, a ninth geomagnetic pattern 1326, a tenth geomagnetic pattern 1327, an eleventh geomagnetic pattern 1328, As a result of applying M angular error values to the twelfth geomagnetic pattern 1329, respectively, M×N geomagnetic patterns (e.g., a first geomagnetic pattern 1620a, a geomagnetic second pattern 1620m, a geomagnetic third reference pattern 1630a, and a geomagnetic fourth reference pattern 1630m) are obtained.

The electronic device 101 according to an embodiment of the present document, in operation 750, determines the electronic device 101 based on a statistical value determined using a plurality of reference geomagnetic patterns (eg, a first reference geomagnetic pattern 1620a, a second reference geomagnetic pattern 1620m, a third reference geomagnetic pattern 1630a, and a fourth reference geomagnetic pattern 1630m) obtained in operation 740. It is possible to determine whether is located in the first area 310 . FIG. 17 is an exemplary diagram for explaining a function or operation of the electronic device 101 according to an embodiment of the present document to determine similarities (eg, statistical values) between a plurality of geomagnetic patterns (eg, a plurality of reference geomagnetic patterns) for which an angular error 1510 is compensated for and a predetermined representative geomagnetic pattern, and to determine whether the electronic device 101 has entered or exited a specific area (eg, a first area) based on the determined similarity. The electronic device 101 according to an embodiment of the present document includes a representative geomagnetic pattern (eg, a geomagnetic pattern obtained along the second copper wire 314) and a plurality of reference geomagnetic patterns (eg, a first reference geomagnetic pattern 1620a, a second reference geomagnetic pattern 1620m, a third reference geomagnetic pattern 1630a, and a fourth reference geomagnetic pattern 1630m) each statistical value (eg: similarity). Statistical values according to an embodiment of the present document are a representative geomagnetic pattern (eg, a geomagnetic pattern obtained along the second flow line 314) and a plurality of reference geomagnetic patterns (eg, a first reference geomagnetic pattern 1620a, a second reference geomagnetic pattern 1620m, a third reference geomagnetic pattern 1630a, and a fourth reference geomagnetic pattern 1630m), respectively, and/or May include Euclidean distance. The electronic device 101 according to an embodiment of the present document may store a threshold range of statistical values in the electronic device 101 . For example, a correlation value between the first reference geomagnetic pattern 1620a and a representative geomagnetic pattern (eg, a geomagnetic pattern obtained along the second flow line 314) is identified as C1, a correlation value between the second reference geomagnetic pattern 1620m and a representative geomagnetic pattern (eg, a geomagnetic pattern obtained along the second flow line 314) is identified as C2, and a third reference geomagnetic pattern 1630a When the correlation value between the reference geomagnetic pattern 1630m and the representative geomagnetic pattern (eg, the geomagnetic pattern obtained along the second flow line 314) is identified as C3, and the correlation value between the fourth reference geomagnetic pattern 1630m and the representative geomagnetic pattern (eg, the geomagnetic pattern obtained along the second flow line 314) is identified as C4, the electronic device 101 according to an embodiment of the present document sets the threshold value to the minimum value among the values C1 to C4. can be determined and stored. The electronic device 101 according to an embodiment of the present document may compare the obtained geomagnetic pattern (e.g., the geomagnetic pattern to be compared) with the representative geomagnetic pattern (e.g., the geomagnetic pattern obtained along the second movement line 314), and determine whether the electronic device 101 has entered or exited a specific area (e.g., the first area 310) based on the comparison result. For example, in a situation where the threshold value is determined to be 0.5, if the correlation between the obtained geomagnetic pattern (e.g., the geomagnetic pattern to be compared) and the representative geomagnetic pattern (e.g., the geomagnetic pattern obtained along the second flow path 314) is identified as 0.9 at a specific time point, it may be determined that the user carrying the electronic device 101 has entered a specific area (e.g., the first area 310). Alternatively, if the correlation between the obtained geomagnetic pattern (e.g., the geomagnetic pattern to be compared) and the representative geomagnetic pattern (e.g., the geomagnetic pattern obtained along the second movement line 314) is identified as 0.1 at a specific time point, it may be determined that the user possessing the electronic device 101 has not passed a specific area (e.g., the first area 310). According to another embodiment of the present document, when the statistical value is a statistical value of a distance concept (e.g., Euclidean distance) rather than a similarity concept, when the value is smaller than a threshold value, it may be determined that the user possessing the electronic device 101 has entered a specific area (e.g., the first area 310). For example, the Euclidean distance value between the first reference geomagnetic pattern 1620a and the representative geomagnetic pattern (eg, the geomagnetic pattern obtained along the second flow line 314) is identified as 1, the Euclidean distance value between the second reference geomagnetic pattern 1620m and the representative geomagnetic pattern (eg, the geomagnetic pattern obtained along the second flow line 314) is identified as 2, and the third reference geomagnetic pattern ( 1630a) and the representative geomagnetic pattern (eg, the geomagnetic pattern obtained along the second flow line 314) is identified as 3, and when the Euclidean distance value between the fourth reference geomagnetic pattern 1630m and the representative geomagnetic pattern (eg, the geomagnetic pattern obtained along the second flow line 314) is identified as 4, the electronic device 101 according to an embodiment of the present document sets a threshold value It may be determined and stored as 4, which is the maximum value of the Euclidean distance. The electronic device 101 according to an embodiment of the present document may compare the obtained geomagnetic pattern (e.g., the geomagnetic pattern to be compared) with the representative geomagnetic pattern (e.g., the geomagnetic pattern obtained along the second movement line 314), and determine whether the electronic device 101 has entered or exited a specific area (e.g., the first area 310) based on the comparison result. For example, at a specific time point, when the Euclidean distance value of the obtained geomagnetic pattern (e.g., the geomagnetic pattern to be compared) and the representative geomagnetic pattern (e.g., the geomagnetic pattern obtained along the second movement line 314) is identified as 4, it may be determined that the user carrying the electronic device 101 has entered a specific area (e.g., the first area 310). Alternatively, at a specific time point, when the Euclidean distance value of the obtained geomagnetic pattern (e.g., the geomagnetic pattern to be compared) and the representative geomagnetic pattern (e.g., the geomagnetic pattern obtained along the second movement line 314) is identified as 5, it may be determined that the user carrying the electronic device 101 has not passed a specific area (e.g., the first area 310). According to another embodiment of the present document, the electronic device 101 determines at least one representative geomagnetic pattern from among a plurality of reference geomagnetic patterns (eg, the first geomagnetic reference pattern 1620a, the second geomagnetic pattern 1620m, the third geomagnetic pattern 1630a, and the fourth geomagnetic pattern 1630m), and the electronic device 101 uses the determined geomagnetic pattern in the first area. It may be determined whether it is located at (310). This will be described in more detail with reference to FIGS. 18 and 19 .

18 and 19 show that the electronic device 101 according to an embodiment of the present document determines at least one geomagnetic pattern as a representative geomagnetic pattern among a plurality of geomagnetic patterns (eg, a plurality of reference geomagnetic patterns) to which the angle error is compensated (eg, the angle error is applied), and compares the obtained geomagnetic data (eg, the geomagnetic pattern) with the at least one representative geomagnetic pattern, so that the electronic device 101 is located in a specific area (eg, a first area). These are exemplary drawings for explaining a function or operation of determining whether entry or exit is made.

Referring to FIG. 18 , the electronic device 101 according to an embodiment of the present document, in operation 1810, some geomagnetic patterns (eg, first reference geomagnetic pattern 1620a, second reference geomagnetic pattern 1620m, third reference geomagnetic pattern 1630a, and fourth reference geomagnetic pattern 1630m) among a plurality of predicted geomagnetic patterns (eg, first reference geomagnetic pattern 1620a). The pattern 1620a and the second reference geomagnetic pattern 1620m may be determined as representative geomagnetic patterns. The electronic device 101 according to an embodiment of the present document includes at least one representative geomagnetic pattern (eg, the first reference geomagnetic pattern 1620a, the second reference geomagnetic pattern 1620m, the third reference geomagnetic pattern 1630a, and the fourth reference geomagnetic pattern 1630m) based on a correlation value among a plurality of geomagnetic patterns (eg, the first geomagnetic pattern 1620a, the second geomagnetic pattern 1620m, the geomagnetic pattern 1620a, the geomagnetic pattern 1630m). A reference geomagnetic pattern 1620m) may be determined. For example, when the first reference geomagnetic pattern 1620a and the fourth reference geomagnetic pattern 1630m are similar to each other (e.g., have a correlation value equal to or greater than a predetermined threshold value) and the second reference geomagnetic pattern 1620m and the third reference geomagnetic pattern 1630a are similar to each other, the electronic device 101 optionally selects the first geomagnetic pattern 1620a and the second geomagnetic pattern 1 620 m) can be determined as representative geomagnetic patterns, respectively.

In operation 1820, the electronic device 101 according to an embodiment of the present document may compare the obtained geomagnetic data (eg, a geomagnetic pattern to be compared) 1910 with each of the representative

geomagnetic patterns

1920a, 1920b, and 1920c. As shown in FIG. 19 , the electronic device 101 according to an embodiment of the present document may derive statistical values between the representative

geomagnetic patterns

1920a, 1920b, and 1920c from the obtained geomagnetic data (eg, the geomagnetic pattern to be compared) 1910.

In operation 1830, the electronic device 101 according to an embodiment of the present document may determine whether the electronic device 101 is located in a specific area (eg, the first area 310) based on the comparison result of operation 1820. The electronic device 101 according to an embodiment of the present document may determine that the user carrying the electronic device 101 has entered a specific area (eg, the first area 310) when the statistical value according to operation 1820 is greater than or equal to a predetermined threshold value (eg, a correlation value of 1) or less (eg, a statistical value corresponding to a statistic of the concept of similarity) or less than (eg, a statistical value corresponding to a statistic of the concept of distance). A predetermined threshold value (eg, 1 as a correlation value) according to an embodiment of the present document may be determined according to the description in relation to operation 750 . For example, a predetermined threshold value according to an embodiment of the present document is based on a statistical value between representative

geomagnetic patterns

1920a, 1920b, and 1920c and a plurality of geomagnetic patterns (eg, a first reference geomagnetic pattern 1620a, a second reference geomagnetic pattern 1620m, a third reference geomagnetic pattern 1630a, and a fourth reference geomagnetic pattern 1630m). can be determined by

According to another embodiment of the present document, the electronic device 101 compares the obtained geomagnetic pattern (eg, the comparison target geomagnetic pattern) with a plurality of reference geomagnetic patterns (eg, the first geomagnetic pattern 1620a, the second geomagnetic pattern 1620m, the third reference geomagnetic pattern 1630a, and the fourth geomagnetic pattern 1630m), respectively, and based on the comparison result, the electronic device 101 ) can be detected. In this case, the electronic device 101 according to an embodiment of the present document has a predetermined threshold value (eg, a correlation value of 1) or more (eg, similarity value) for at least one reference geomagnetic pattern among a plurality of reference geomagnetic patterns (eg, the first geomagnetic pattern 1620a, the second geomagnetic pattern 1620m, the third geomagnetic pattern 1630a, and the fourth geomagnetic pattern 1630m). When the statistical value corresponds to the statistical value of the concept) or less (eg, the statistical value corresponding to the statistical value of the concept of distance), it may be determined that the user carrying the electronic device 101 has entered a specific area (eg, the first area 310). A predetermined threshold value (eg, 1 as a correlation value) according to an embodiment of the present document may be determined according to the description in relation to operation 750 .

An electronic device (eg, electronic device 101 of FIG. 1 ) according to an embodiment of the present document includes a geomagnetic sensing module (eg, sensor module 176 of FIG. 1 ), a memory (eg, memory 130 of FIG. 1 ), and at least one processor (eg, processor 120 of FIG. 1 ). , modeling the obtained first geomagnetic data with a polynomial determined based on the properties of the first area, setting at least one second area to which the modeled polynomial is applied, estimating a plurality of geomagnetic patterns for the at least one second area using the modeled polynomial, and performing an operation for correcting an angular error related to a moving direction of the electronic device for each of the estimated plurality of geomagnetic patterns, thereby obtaining a plurality of reference geomagnetic patterns and storing them in the memory. and determine whether the electronic device is located in the first area based on a statistical value determined using the obtained plurality of reference geomagnetic patterns.

Electronic devices according to various embodiments disclosed in this document may be devices of various types. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. An electronic device according to an embodiment of the present document is not limited to the aforementioned devices.

Various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "secondary" may be used simply to distinguish a corresponding component from other corresponding components, and do not limit the corresponding components in other respects (e.g., importance or order). When a (e.g., a first) component is referred to as “coupled” or “connected” to another (e.g., a second) component, with or without the terms “functionally” or “communicatively,” it means that the component may be connected to the other component directly (e.g., by wire), wirelessly, or through a third component.

The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as, for example, logic, logical block, component, or circuit. A module may be an integrally constructed component or a minimal unit of components or a portion thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document may be implemented as software (eg, program 140) including one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101). For example, a processor (eg, the processor 120 ) of a device (eg, the electronic device 101 ) may call at least one command among one or more instructions stored from a storage medium and execute it. This enables the device to be operated to perform at least one function according to the at least one command invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, "non-temporary" only means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic wave), and this term does not distinguish between the case where data is semi-permanently stored in the storage medium and the case where it is temporarily stored.

According to one embodiment, the method according to various embodiments disclosed in this document may be included and provided in a computer program product. Computer program products may be traded between sellers and buyers as commodities. A computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or distributed (e.g., downloaded or uploaded) online, through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store server, or a relay server's memory.

According to one embodiment of this document, each of the above-described components (eg, modules or programs) may include a single object or a plurality of objects, and some of the multiple objects may be separately disposed in other components. According to an embodiment of the present document, one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. According to one embodiment of this document, the operations performed by modules, programs, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, may be omitted, or one or more other operations may be added.

Claims

In electronic devices,

geomagnetic sensing module,

memory, and

including at least one processor, wherein the at least one processor comprises:

obtaining first geomagnetic data for a first region sensed using the geomagnetic sensing module from the geomagnetic sensing module;

Modeling the obtained first geomagnetic data with a polynomial determined based on attributes of the first region;

Setting at least one second region to which the modeled polynomial is applied, estimating a plurality of geomagnetic patterns for the at least one second region using the modeled polynomial;

Obtaining and storing a plurality of reference geomagnetic patterns in the memory by performing an operation for correcting an angular error related to a moving direction of the electronic device for each of the estimated plurality of geomagnetic patterns;

The electronic device, characterized in that it is set to determine whether the electronic device is located in the first area based on a statistical value determined using the obtained plurality of reference geomagnetic patterns.
According to claim 1,

The electronic device further includes a camera module,

The electronic device, characterized in that the at least one processor is further configured to set coordinates of the first region based on an image acquired using the camera module.
According to claim 1,

The electronic device characterized in that the property of the first area includes a length of a horizontal axis or a length of a vertical axis of the first area.
According to claim 1,

The electronic device of claim 1 , wherein the at least one processor is further configured to set the second area by extending a length of a horizontal axis or a length of a vertical axis of the first area according to a predetermined ratio.
According to claim 1,

The electronic device of claim 1 , wherein the at least one processor is further set to set the second area by reducing a length of a vertical axis of the first area according to a predetermined ratio.
According to claim 1,

The electronic device of claim 1, wherein the at least one processor is further configured to acquire the plurality of geomagnetic patterns according to intervals determined based on the number of geomagnetic patterns the electronic device intends to acquire.
According to claim 1,

The angular error may include an angle according to a difference between an actual movement direction of the electronic device and a movement direction estimated by the at least one processor.
According to claim 1,

The electronic device, characterized in that, the at least one processor is further set to obtain the plurality of reference geomagnetic patterns using some angle error values among angle error values included in the range of the angle error.
According to claim 1,

The at least one processor,

Determine a range of the statistical value based on a similarity between the plurality of reference geomagnetic patterns and a representative geomagnetic pattern;

The electronic device of claim 1 , further configured to determine that the electronic device is located in the first area when the second geomagnetic data sensed by the sensor module is included within the range of the statistical value.
According to claim 1,

The electronic device of claim 1, wherein the at least one processor is further configured to determine whether the electronic device is located in the first region based on a similarity between at least one representative geomagnetic pattern determined from among the plurality of reference geomagnetic patterns and second geomagnetic data sensed by the sensor module.
A method for controlling an electronic device,

obtaining, from the geomagnetic sensing module, first geomagnetic data for a first area sensed using the geomagnetic sensing module of the electronic device;

modeling the obtained first geomagnetic data with a polynomial determined based on the attribute of the first area;

setting at least one second area to which the modeled polynomial is applied, and estimating a plurality of geomagnetic patterns for the at least one second area using the modeled polynomial;

Acquiring and storing a plurality of reference geomagnetic patterns in a memory of the electronic device by performing an operation for correcting an angular error related to a moving direction of the electronic device for each of the estimated plurality of geomagnetic patterns; and

and determining whether the electronic device is located in the first area based on a statistical value determined using the obtained plurality of reference geomagnetic patterns.
According to claim 11,

The electronic device further includes a camera module,

The method of controlling the electronic device may further include setting coordinates of the first region based on an image acquired using the camera module.
According to claim 11,

The method of claim 1 , wherein the property of the first area includes a length of a horizontal axis or a length of a vertical axis of the first area.
According to claim 11,

The method of controlling the electronic device may further include setting the second area by extending a length of a horizontal axis or a length of a vertical axis of the first area according to a predetermined ratio.
According to claim 11,

The method of controlling the electronic device may further include setting the second area to be set by reducing a length of a vertical axis of the first area according to a predetermined ratio.