KR102446804B1 - Method and Apparatus for Detecting User Approach Based on RF Fingerprint - Google Patents

Abstract

The present invention relates to a method and apparatus for detecting user access based on an RF fingerprint, and by comparing two or more radio signal information searched by the access detecting device with a pre-stored RF fingerprint, corresponding to at least one radio wave generating device within a certain radius By extracting the user information that the user has, and calculating the degree of access between the radio wave generating device and the access detecting device possessed by the user based on the radio signal information and the pre-stored RF fingerprint, the RF fingerprint is used to prevent lost children and the elderly. It can have an excellent effect in preventing disappearance and preventing the disappearance of dogs.

Description

Method and Apparatus for Detecting User Approach Based on RF Fingerprint

The present invention relates to a method and apparatus for detecting user access based on an RF fingerprint, and more particularly, to generate and store an RF fingerprint of a radio wave generating device that generates two or more radio signals, and the stored RF fingerprint and an approach detecting device The present invention relates to a method and apparatus for calculating the degree of access of a user possessing the radio wave generating device to an approach detecting device by comparing the radio signal information measured at the current location.

The content described in this section merely provides background information on the present embodiment and does not constitute the prior art.

Unlike wired, wireless has a separate network access point, so broadcast communication is basically performed between a device and a wireless access device. Therefore, an attacker can perform various attacks such as DOS, phishing, and man-in-the-middle attacks by using the information that monitors the traffic of individual devices without making any special effort. Of course, network administrators can also monitor such traffic conditions like attackers to detect and respond to attack threats.

However, the problem is whether a wireless attack is occurring when the attacker's cloned AP data that duplicates the device identification information such as MAC address, SSID, and BSSID (Basic Service Set Identification) of the authorized AP is mixed and transmitted and received. It is very important to be able to detect, identify which data frame the attacker sent, and identify the location of the device in terms of the strength of the received signal.

Therefore, the fingerprinting technology can uniquely identify and uniquely classify a specific device through analysis of information received from a specific wireless device (eg, physical hardware layer information such as wireless modem, MAC software layer information such as beacon header, etc.) It is important to extract the characteristic stake, that is, the fingerprint, and there are various techniques depending on the method of extracting these characteristics.

The fingerprinting mechanism is largely divided into fingerprint generation and classification step. The generation step is a step of collecting and signal processing the wireless signal transmitted by the device to extract features that can uniquely distinguish the device, and the classification step is the generation step It is determined whether the device is a clone device by classifying the extracted feature values in a statistical manner and determining whether they match the fingerprint of the device extracted and stored in the learning process.

By judging whether a clone device is a clone device through these steps, a normal device, not a clone device, is recognized as an authorized user. If they match by comparison, it was recognized as a normal device.

However, this method has a problem in that the clone device can be recognized as a normal device by duplicating the feature values of the wireless environment extracted in the generation step and manufacturing a clone device having the same fingerprint as the normal device, and a higher level A user authentication method with security of

US Patent Publication No. 2012/0042369 (Name: DATA CARD, METHOD AND SYSTEM FOR IDENTIFYING FINGERPRINT WITH DATA CARD, 2012.02.16.)

In order to satisfy the above-mentioned needs, the present invention provides an approach detecting device by searching for two or more radio signals transmitted by one or more radio wave generating devices, and comparing the detected radio signals with a pre-stored RF fingerprint, and through this, the radio wave generating device is By extracting the user information possessed and calculating the degree of access between the access detection device and the radio wave generator based on the detected radio signal information and the pre-stored RF fingerprint, it helps to prevent the disappearance of the lost child, the elderly, and dogs. An object of the present invention is to provide a method and apparatus for detecting user access.

However, the object of the present invention is not limited to the above object, and other objects not mentioned will be clearly understood from the following description.

The method for detecting user access according to the present invention for achieving the above object is a step of detecting, by an access detecting device, two or more radio signals transmitted by at least one radio wave generating device, the detected two or more radio signal information and the Comparing stored radio frequency (RF) fingerprints, extracting user information corresponding to the at least one radio wave generating device within a predetermined radius from the approach detecting device based on the comparison result, and the radio signal information and The method may include calculating an access degree between the access detection device and the at least one radio wave generating device corresponding to the extracted user information based on the RF fingerprint.

In this case, the calculating may include calculating a first distance value that is a distance between the at least one radio wave generating device and the approach detecting device based on the wireless signal information and the RF fingerprint, and the calculating may include: A second distance value that is a distance value between the radio wave generator and the approach detection device calculated before calculating the first distance value, the first distance value, and the at least one Approach speed of radio wave generator can be calculated.

The method may further include, before the searching step, receiving and storing an RF fingerprint according to a combination of two or more radio signals generated by the radio wave generating device from the at least one radio wave generating device or an RF fingerprint management server. can

On the other hand, the method for detecting user access may be provided as a computer-readable recording medium in which a program for executing the method is recorded, and may be provided as a computer program implemented to execute and stored in a computer-readable recording medium.

Approach detection device according to the present invention for achieving the object as described above is at least one communication module for detecting one or more radio signals around the proximity detection device, at least one radio wave generating device to store the generated RF fingerprint Two or more radio signals transmitted by at least one radio wave generating device are searched for through a storage module and the communication module, and a predetermined value is obtained from the access detection device based on a comparison result between the searched radio signal information and the pre-stored RF fingerprint. By extracting user information corresponding to the at least one radio wave generating device within a radius, the at least one radio wave generating device and the approach detecting device corresponding to the extracted user information based on the radio signal information and the RF fingerprint It may include a control module for calculating the degree of access between the.

In this case, the control module may calculate a first distance value that is a distance between the at least one radio wave generator corresponding to the user information and the approach detection device based on the wireless signal information and the RF fingerprint, The storage module further stores the calculated distance value between the radio wave generating device and the approach detecting device, and the control module is configured to store a first distance value between the radio wave generating device and the approach detecting device calculated before the first distance value is calculated. The approach speed of the at least one radio wave generator may be calculated based on the two distance values, the first distance value, and the time difference at which the first and second distance values are calculated.

In addition, the communication module transmits/receives data to and from the RF fingerprint management server and the at least one radio wave generating device, and the control module receives a combination of two or more radio signals generated by the at least one radio wave generating device through the communication module. When receiving the RF fingerprint according to the at least one radio wave generating device or the RF fingerprint management server, it is possible to control to store the received RF fingerprint in the storage module.

According to the present invention, user information corresponding to at least one radio wave generating device within a certain radius is extracted by comparing two or more radio signal information searched by the approach detecting device with a pre-stored RF fingerprint, and the radio signal information and By calculating the degree of access between the radio wave generator and the approach detection device possessed by the user based on the pre-stored RF fingerprint, the RF fingerprint can be used to prevent missing children, prevent the disappearance of the elderly, and prevent the disappearance of dogs. have.

In particular, when calculating the degree of approach, by calculating the distance and speed between the radio wave generating device and the approach detecting device, the user of the approach detecting device determines how far away and at what speed the object being protected is moving away from and approaching. can be identified and the protection target can be effectively protected.

1 is a diagram showing the configuration of a user access detection system according to an embodiment of the present invention.
2 is a block diagram showing the configuration of a radio wave generator according to the present invention.
3 is a flowchart for explaining a method of operating a radio wave generator according to an embodiment of the present invention.
4 is a block diagram showing the configuration of an approach detecting device according to the present invention.
5 to 6 are flowcharts for explaining a method of operating an approach detecting device according to an embodiment of the present invention.
7 is a block diagram showing the configuration of an RF fingerprint management server according to the present invention.
8 to 9 are flowcharts for explaining a method of operating an RF fingerprint management server according to an embodiment of the present invention.
10 is a diagram illustrating an operating environment in a service system for user access detection according to an embodiment of the present invention.

In order to clarify the characteristics and advantages of the problem solving means of the present invention, the present invention will be described in more detail with reference to specific embodiments of the present invention shown in the accompanying drawings.

However, detailed descriptions of well-known functions or configurations that may obscure the gist of the present invention in the following description and accompanying drawings will be omitted. In addition, it should be noted that throughout the drawings, the same components are denoted by the same reference numerals as much as possible.

The terms or words used in the following description and drawings should not be construed as being limited to conventional or dictionary meanings, and the inventor may properly define the concept of terms for describing his invention in the best way. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all of the technical spirit of the present invention. It should be understood that there may be equivalents and variations.

In addition, terms including ordinal numbers such as 1st, 2nd, etc. are used to describe various components, and are used only for the purpose of distinguishing one component from other components, and to limit the components. not used

For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

In addition, the terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention.

The singular expression includes the plural expression unless the context clearly dictates otherwise. In addition, terms such as "comprises" or "have" described in this specification are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or the It should be understood that the above does not preclude the possibility of addition or existence of other features or numbers, steps, operations, components, parts, or combinations thereof.

In addition, terms such as "unit", "group", and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software.

Also, "a or an", "one", "the" and like related terms are used differently herein in the context of describing the invention (especially in the context of the following claims). Unless indicated or clearly contradicted by context, it may be used in a sense including both the singular and the plural.

In addition to the above-described terms, specific terms used in the following description are provided to help the understanding of the present invention, and the use of these specific terms may be changed to other forms without departing from the technical spirit of the present invention.

In addition, embodiments within the scope of the present invention include computer-readable media having or carrying computer-executable instructions or data structures stored thereon.

Such computer readable media can be any available media that can be accessed by a general purpose or special purpose computer system.

By way of example, such computer-readable media may be in the form of RAM, ROM, EPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, or computer-executable instructions, computer-readable instructions, or data structures. It may include, but is not limited to, a physical storage medium such as any other medium that can be used to store or convey any program code means in .

Furthermore, the present invention relates to personal computers, laptop computers, handheld devices, multiprocessor systems, microprocessor-based or programmable consumer electronics, network PCs, minicomputers, mainframe computers, mobile telephones, PDAs, pagers. It may be implemented in a network computing environment having various types of computer system configurations, including (pager) and the like.

The invention may also be practiced in distributed system environments where both local and remote computer systems linked through a network by a wired data link, a wireless data link, or a combination of wired and wireless data links perform tasks. In a distributed system environment, program modules may be located in local and remote memory storage devices.

On the other hand, the radio signal transmitted from the radio wave generating device according to the present invention can be various as Wi-Fi, Bluetooth, Zigbee, UWB (Ultra-WideBand), NFC (Near Field Communication), RFID (Radio Frequency IDentification), etc. Any device capable of generating a radio signal regardless of the type can be utilized as the radio wave generating device according to the present invention.

In addition, the radio wave generator according to the present invention may generate one type of radio signal, but may also generate two or more radio signals.

Accordingly, a user who owns the radio wave generating device may have two or more radio wave generating devices that generate one type of radio signal, or may have one radio wave generating device that generates two or more radio signals.

Of course, in some cases, one radio wave generating device for generating two or more radio signals may have two or more.

For convenience of description, in the present invention, it is assumed that the user has a radio wave generating device that generates two or more radio signals.

A typical radio wave generator for generating two or more radio signals may include a smart phone. Therefore, for convenience of explanation, it is assumed that the radio wave generator is a smart phone.

However, the radio wave generating device is not limited to a smart phone, and any device capable of generating two or more radio signals may be a radio wave generating device according to an embodiment of the present invention.

In addition, the approach detecting device for detecting the degree of approach of the radio wave generating device may also be a smart phone. Therefore, the radio wave generating device and the approach detecting device do not necessarily have to be different types of devices, and two or more devices of the same type can perform the functions of the radio wave generating device and the approach detecting device, respectively, if necessary.

Now, an apparatus for detecting user access in a user access detecting system according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a diagram schematically illustrating the structure of a user access detection system according to an embodiment of the present invention.

Referring to FIG. 1 , a user access detection system according to an embodiment of the present invention may include a radio wave generator 200 , an access detection device 300 , and an RF fingerprint management server 400 .

Here, the radio wave generating device 200 can transmit various types of radio signals as described above, and therefore, the radio signal searched by the approach detecting device 300 is not limited to a specific radio signal.

In addition, the radio wave generating device 200 and the access detecting device 300 are interlocked with the RF fingerprint management server 400 through the communication network 100 .

Then, each component will be schematically described with reference to FIG. 1 .

First, the communication network 100 serves to transmit data for data transmission and reception between the radio wave generator 200 , the access detection device 300 and the RF fingerprint management server 400 , and according to the system implementation method, Ethernet (Ethernet) ), xDSL (ADSL, VDSL), HFC (Hybrid Fiber Coaxial Cable), FTTC (Fiber to The Curb), FTTH (Fiber To The Home), etc. Wireless communication methods such as Wi-Fi), Wibro, Wimax, High Speed Downlink Packet Access (HSDPA), Long Term Evolution (LTE), and Long Term Evolution Advanced (LTE-A) may be used.

In addition, the communication network 100 includes, for example, a plurality of access networks (not shown) and a core network (not shown), and may be configured to include an external network, for example, an Internet network (not shown). Here, the access network (not shown) is an access network for performing wired/wireless communication with the terminal device 300 , for example, a plurality of base stations such as BS (Base Station), BTS (Base Transceiver Station), NodeB, eNodeB, and the like, and BSC. (Base Station Controller), may be implemented as a base station controller such as RNC (Radio Network Controller). In addition, as described above, the digital signal processing unit and the wireless signal processing unit, which were integrally implemented in the base station, are divided into digital units (Digital Unit, hereinafter referred to as DU and radio unit, hereinafter referred to as RU), respectively, A plurality of RUs (not shown) may be installed in a plurality of areas, respectively, and the plurality of RUs (not shown) may be connected to a centralized DU (not shown) to be configured.

In addition, the core network (not shown) constituting the mobile network together with the access network (not shown) serves to connect the access network (not shown) and an external network, for example, an Internet network (not shown).

As described above, the core network (not shown) is a network system that performs a main function for a mobile communication service such as mobility control and switching between access networks (not shown), and performs circuit switching or packet switching (packet). switching), and manages and controls packet flow in the mobile network. In addition, the core network (not shown) manages inter-frequency mobility, and performs a role for interworking with traffic in the access network (not shown) and the core network (not shown) and other networks, for example, the Internet network (not shown). may be Such a core network (not shown) further includes Serving GateWay (SGW), PDN GateWay (PGW), Mobile Switching Center (MSC), Home Location Register (HLR), Mobile Mobility Entity (MME) and Home Subscriber Server (HSS). It may be configured to include.

In addition, the Internet network (not shown) refers to a general public communication network, that is, a public network, through which information is exchanged according to the TCP/IP protocol, and is connected to the radio wave generator 200 or the access detection device 300, The information provided from the radio wave generating device 200 or the access detecting device 300 may be provided to the RF fingerprint management server 400 through the core network (not shown) and the access network (not shown), and vice versa. The information provided to the management server 400 may be provided to the access detection device 300 through a core network (not shown) and an access network (not shown). However, the present invention is not limited thereto, and the RF fingerprint management server 400 may be implemented integrally with the core network (not shown).

In addition, in addition to the above-described communication methods, all other well-known or future communication methods may be included.

The radio wave generator 200 means a device that periodically or aperiodically transmits one or more different types of radio signals.

The radio wave generating device 200 generates an RF fingerprint according to a combination of at least two or more of the radio signals transmitted by the radio wave generating device 200 and one or more reference positions.

At this time, the information included in the RF fingerprint includes identification information of the radio wave generating device 200 (eg, ID of the radio wave generating device, etc.), radio signal transmission power, frequency channel information of two or more radio signals according to a combination, etc. may be included, and any information may be included in the RF fingerprint as long as a unique value capable of expressing the radio wave generator 300 can be generated by a combination of radio signals in addition to this information.

The radio wave generator 200 that has generated the RF fingerprint transmits the generated RF fingerprint to the RF fingerprint management server 400 or the access detection device 300 .

In addition, the radio wave generator 200 receives a user's request for selecting a combination of two or more radio signals, and transmits a radio signal according to the selected radio signal combination.

For example, if the user selects the Bluetooth signal and the NFC signal, the radio wave generator 200 transmits the Bluetooth signal and the NFC signal.

However, the radio wave generating device 200 may directly receive a user's request for the input related to selection of a combination of two or more wireless signals, or may receive a remote input from the access detecting device 300 or the like.

In addition, two or more wireless signals may be transmitted for general data transmission/reception without separately receiving a user's request, and the user's access level may be determined through this.

That is, if the radio wave generating device 200 transmits and receives data with the Bluetooth earphone while transmitting the Bluetooth wireless signal for connection with the Bluetooth earphone, and continuously transmits the NFC wireless signal for payment of public transportation fees, such signal The approach detection device 300 may detect and determine the degree of approach.

Approach detection apparatus 300 of the present invention detects and detects a wireless signal transmitted from the radio wave generator 200 according to a user's operation, and via the communication network 100, the RF fingerprint management server 400 and various data It means a user's device that can send and receive

The approach detecting device 300 according to an embodiment of the present invention generates an RF fingerprint according to a combination of two or more radio signals transmitted by at least one radio wave generating device 200 to the radio wave generating device 200 or the RF fingerprint management server ( 400) and store it.

Thereafter, the access detection device 300 searches for two or more wireless signals detected in the vicinity of the access detection device 300 , compares the detected two or more wireless signal information with the stored RF fingerprint, and approaches based on the comparison result. One or more radio wave generators 200 within a predetermined radius are extracted from the detection device 300 , and user information corresponding to the extracted radio wave generator 200 is extracted.

That is, by comparing the searched two or more radio signal information with the stored RF fingerprint, the identification information of the radio wave generating device 200 is found, and information about the user who possesses the radio wave generating device 200 through the identification information is to extract

Then, by calculating the degree of access between the radio wave generating device 200 and the approach detecting device 300 based on the radio signal information and the RF fingerprint, the access between the radio wave generating device 200 owner and the access detecting device 300 user In this case, the degree of approach may include a distance between the radio wave generating device 200 and the approach detecting device 300 and a relative approach speed.

Accordingly, the approach detecting device 300 calculates a first distance value that is the distance between the radio wave generating device 200 and the approach detecting device 300 based on the stored RF fingerprint and the detected two or more radio signal information, and calculates The distance value can be saved.

In this case, the stored distance value is called a second distance value for convenience of description.

That is, the second distance value means a distance value between the radio wave generating device 200 and the approach detecting device 300 calculated before the first distance value is calculated.

Therefore, the approach detecting device 300 determines the relative approach speed between the radio wave generating device 200 and the approach detecting device 300 based on the time difference at which the first distance value, the second distance value, and the first and second distance values are calculated. can be calculated.

For example, the currently calculated first distance value is 5 m, the second distance value previously calculated and stored by the approach detection device 300 is 10 m, and the first distance value was calculated at 14:20:30 , if the second distance value is calculated at 14:20:25, the difference between the first distance value and the second distance value is 5 m, and the difference between the time at which the first and second distance values are calculated is 5 seconds, so 5 m/ It means that the holder of the at least one radio wave generating device 200 is approaching the user of the approach detecting device 300 at the speed of s.

Here, the first calculated and stored second distance value is 5m, the currently calculated first distance value is 10m, the first distance value is calculated at 14:20:30, and the second distance value is 14:20:25 If it is calculated in seconds, it means that the holder of the at least one radio wave generating device 200 is moving away from the user of the approach detecting device 300 at a speed of 5 m/s.

However, here, 5 m indicated by the first distance value and 10 m indicated by the second distance value are not information that considers the direction, and the radio wave generator 200 from the approach detection device 300 is currently in a radius of 5 m, and has a radius of 10 m in the past. Since it indicates information that it was located in If the direction of the radio wave generating device 200 to the approach detecting device 300 at the time of calculation can be found, the accurate relative approach speed can be calculated.

The approach detecting device 300, which calculated the degree of access between the access detecting device 300 and the radio wave generating device 200 as described above, exposes the calculated result to provide the user with the access degree with the radio wave generating device 200 holder. will provide

Meanwhile, the process of calculating the degree of access between the radio wave generating device 200 and the approach detecting device 300 described above may be performed by the RF fingerprint management server 400 .

In this case, the access detection device 300 searches for two or more wireless signals in the vicinity, transmits the discovered wireless signal information to the RF fingerprint management server 400 , and the access calculated by the RF fingerprint management server 400 . The degree of approach between the detection device 300 and the radio wave generating device 200 , that is, the distance value and the relative approach speed between the approach detecting device 300 and the radio wave generating device 200 may be received and provided to the user.

On the other hand, as described above, the approach detecting device 300 and the radio wave generating device 200 may be a terminal device that generates two or more wireless signals including a typical smart phone.

However, the terminal device including the approach detecting device 300 and the radio wave generating device 200 is not limited to a smart phone, and may be implemented in various forms.

For example, the approach detecting device 300 and the radio wave generating device 200 described in this specification are a smart phone, a tablet PC, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) , a mobile terminal such as an MP3 player, as well as a fixed terminal such as a smart TV or a desktop computer may be used.

In addition, the approach detecting device 300 and the radio wave generating device 200 of the present invention can not be enumerated because the variations of portable devices are very diverse according to the convergence trend of digital devices, but the above-mentioned units and An equivalent level unit can be used as the access detection device 300 and the radio wave generator 200 according to the present invention, and any device can download and install an app for calculating the degree of access according to the present invention. It can be used as the approach detecting device 300 and the radio wave generating device 200 according to an embodiment of the present invention.

The access detecting device 300 and the radio wave generating device 200 may be a user's device capable of transmitting and receiving various data via the communication network 100 according to a user's manipulation. Such a terminal device may perform voice or data communication through the communication network 100 , may transmit/receive information through the RF fingerprint management server 400 and the communication network 100 , and transmit/receive and process wireless signal-based calls Information can be received through memory, which stores programs and protocols for For this purpose, the terminal device such as the radio wave generating device 200 and the approach detecting device 300 of the present invention may include a microprocessor, etc. for executing and controlling the operation and control of the radio signal program.

The access detecting device 300 and the radio wave generating device 200 preferentially connect to an app providing device (not shown) connected to the communication network 100, for example, an app store, and receive a wireless signal from the corresponding app store to receive a wireless signal. An app that extracts the characteristic value of a signal can be received and installed. The terminal device executes this app, detects the two or more wireless signals, extracts wireless signal characteristic information, that is, an RF fingerprint, and transmits it to the RF fingerprint management server 400, the RF fingerprint management server A service (eg, user authentication, etc.) mapped to the corresponding radio signal characteristic information may be received from 400 and provided to the user.

The RF fingerprint management server 400 stores an RF fingerprint for a combination of two or more radio signals transmitted by at least one radio wave generator 200 , and provides an RF fingerprint stored in the access detection device 300 . to be.

In particular, in the present invention, the RF fingerprint management server 400 receives and stores an RF fingerprint according to a combination of two or more radio signals from at least one radio wave generator 200 , and an RF fingerprint from the access detection device 300 . When the transmission request is received, the RF fingerprint is transmitted to the access detection device 300 according to the transmission request.

On the other hand, the process of calculating the degree of access between the approach detecting device 300 and the at least one radio wave generating device 200 may be calculated and transmitted by the RF fingerprint management server 400, not the access detecting device 300, In this case, the RF fingerprint management server 400 may transmit the calculated access degree result to the access detection device 300 and provide it to the user of the access detection device 300 .

That is, the at least one radio wave generating device by receiving two or more radio signal information searched by the access detecting device 300 from the access detecting device 300 and comparing the received radio signal information with the pre-stored RF fingerprint information Extract user information corresponding to

In this case, the extracted user information may extract user information corresponding to the radio wave generating device 200 within a predetermined radius from the approach detecting device 300 .

And, based on the received radio signal information and RF fingerprint, the degree of access between the access detection device 300 and the radio wave generating device 200 is calculated. It may be a distance between the generators 200, or it may be a relative speed.

In the case of calculating the relative speed, the distance between the approach detecting device 300 and the radio wave generating device 200 is arithmetic and stored (second distance value), and after a predetermined time, the approach detecting device 300 and the radio wave generating device ( 200) by calculating the distance (the first distance value), the relative speed may be obtained based on the time difference at which the first distance value, the second distance value, and the first and second distance values are calculated.

The calculated numerical value regarding the degree of access is provided to the user by transmitting the RF fingerprint management server 400 to the access detecting device 300 .

The RF fingerprint management server 400 according to an embodiment of the present invention has the same configuration as a typical web server or network server in terms of hardware. However, in terms of software, program modules implemented through languages such as C, C++, Java, Visual Basic, and Visual C are included.

On the other hand, the memory mounted in each device of the present invention stores information in the device. For one implementation, the memory is a computer-readable medium. In one implementation, the memory may be a volatile memory unit, and in another implementation, the memory may be a non-volatile memory unit. In one embodiment, the storage device is a computer-readable medium.

In various different implementations, the storage device may include, for example, a hard disk device, an optical disk device, or some other mass storage device.

Although this specification and drawings describe exemplary device configurations, implementations of the functional operations and subject matter described herein may be implemented in other types of digital electronic circuits, or may represent structures disclosed herein and structural equivalents thereof. It may be implemented as computer software, firmware, or hardware including, or a combination of one or more of these.

Implementations of the subject matter described herein relate to one or more computer program products, ie computer program instructions encoded on a tangible program storage medium for execution by or for controlling the operation of an apparatus according to the invention. It can be implemented as the above modules. The computer readable medium may be a machine readable storage device, a machine readable storage substrate, a memory device, a composition of matter that affects a machine readable radio wave signal, or a combination of one or more thereof.

As described above, the structure of the RF fingerprint-based user access detection system according to an embodiment of the present invention has been schematically described.

Hereinafter, among the configurations of the system, the configuration and operation method of the radio wave generator 200 according to the present invention will be described.

2 is a block diagram showing a main configuration of the radio wave generating device 200, and FIG. 3 is a flowchart for explaining an operation method of the radio wave generating device 200 according to an embodiment of the present invention.

First, referring to FIG. 2 , the radio wave generator 200 according to the present invention includes an input module 210 , an output module 230 , a storage module 250 , at least one communication module 270 , and a control module 290 . ) may be included.

The input module 210 receives various information such as number and character information, and transmits an input signal related to setting various functions and controlling the functions of the radio wave generator 200 to the control module 290 . In addition, the input module 210 may be configured to include at least one of a keypad and a touchpad that generate an input signal according to a user's touch or manipulation. In this case, the input module 210 may be configured in the form of a single touch panel (or touch screen) together with the output module 230 to simultaneously perform input and display functions. In addition, as the input module 210 , all types of input means that may be developed in the future may be used in addition to input devices such as a keyboard, a keypad, a mouse, a joystick, and the like. In particular, the input module 210 according to the present invention detects input information input from the user and transmits it to the control module 290 .

In particular, in the present invention, the input module 210 receives an input from the user on which two or more of the plurality of wireless signals to transmit, and transmits the received information to the control module 290 .

The output module 230 displays information about a series of operation states and operation results that occur while the function of the radio wave generator 200 is performed. Also, the output module 230 may display a menu of the radio wave generator 200 and user data input by the user. Here, the output module 230 is a liquid crystal display (LCD), an ultra-thin liquid crystal display (TFT-LCD, Thin Film Transistor LCD), a light emitting diode (LED, Light Emitting Diode), an organic light emitting diode (OLED, Organic LED), an active organic light emitting diode (AMOLED, Active Matrix OLED), a Retina Display, a flexible display, a three-dimensional display, and the like. In this case, when the output module 230 is configured in the form of a touch screen, the output module 230 may perform some or all of the functions of the input module 210 .

The storage module 250 is a device for storing data, includes a main memory device and an auxiliary memory device, and stores an application program required for the functional operation of the radio wave generator 200 . The storage module 250 may largely include a program area and a data area. Here, when each function is activated in response to a user's request, the radio wave generator 200 executes corresponding application programs under the control of the control module 290 to provide each function.

In particular, the storage module 250 according to the present invention may store RF fingerprint information, which is a unique characteristic of the radio wave generator 200 according to a combination of two or more radio signals, in the form of a fingerprint DB 251 .

The communication module 270 is for transmitting and receiving data to and from the RF fingerprint management server 400 through the communication network 100 , and for receiving a signal for periodically or aperiodically transmitting two or more wireless signals.

In addition, the communication module 270 includes an RF transmitting means for up-converting and amplifying the frequency of a transmitted signal, an RF receiving means for low-noise amplifying a received signal and down-converting the frequency, and for processing a communication protocol according to a specific communication method. data processing means and the like. The communication module 270 may include at least one of a wireless communication module (not shown) and a wired communication module (not shown). In addition, the wireless communication module is a configuration for transmitting and receiving data according to a wireless communication method, and when the radio wave generator 200 uses wireless communication, any one of a wireless network communication module, a wireless LAN communication module, and a wireless fan communication module Data may be transmitted/received to and from the RF fingerprint management server 400 by using it.

Here, the communication module 270 may include at least one or more communication modules 270 for generating at least one or more wireless signals, using any wireless communication method such as Bluetooth, Wi-Fi, RFID, or NFC. Embodiments according to the present invention can be carried out.

In addition, when the communication module 270 transmits/receives data to and from the RF fingerprint management server 400 through the communication network 100 , at least one of the plurality of communication modules 270 is a WLAN (Wireless LAN), Wi-Fi ( Wireless communication methods such as Wi-Fi), Wibro, Wimax, and High Speed Downlink Packet Access (HSDPA) may be used.

The control module 290 may be an operating system (OS) and a process device for driving each component.

The control module 290 controls the overall operation process of the radio wave generating device 200. Referring to FIG. 3, the control module 290 controls the overall operating process of the radio wave generating device 200. Let's take a look.

Referring to FIG. 3 , the radio wave generating device 200 generates an RF fingerprint according to a combination of at least two or more of a plurality of wireless signals, stores it in the storage module 250 ( S101 ), and requests the stored RF fingerprint from the user Alternatively, it is transmitted to the RF fingerprint management server 400 or the access detection device 300 as necessary (S103).

Then, according to the user's request, two or more radio signals are selected among a plurality of radio signals (S105), and a radio signal according to the selected radio signal combination is transmitted (S109).

That is, if the user selects the Bluetooth and NFC signals as the wireless signals to be transmitted, the radio wave generator 2000 transmits the Bluetooth and NFC signals.

The overall operation process of the radio wave generating device 200 according to each embodiment of the present invention described above may be controlled and executed by the control module 290 of the radio wave generating device 200 .

The configuration and operation method of the radio wave generator 200 according to the present invention have been described above.

Hereinafter, the configuration and operation method of the approach detecting device 300 according to the present invention will be described.

4 is a view showing the main configuration of the approach detecting device 300 according to the present invention, Figures 5 to 6 are flowcharts for explaining the operation process of the approach detecting device 300 according to each embodiment of the present invention. .

Referring to FIG. 4 , the access detection device 300 according to the present invention may include at least one communication module 310 , a storage module 330 , an output module 350 , and a control module 370 . .

The communication module 310 is a device that performs the same function as the communication module 270 of the radio wave generating device 200 and serves to search for two or more radio signals transmitted by the radio wave generating device 200 .

Here, the communication module 310 may include at least one communication module 310 that detects and detects at least one or more wireless signals, using any wireless communication method such as Bluetooth, Wi-Fi, RFID, or NFC. Detection and discovery are possible, and the number of communication modules 310 will increase as much as the type of wireless communication method.

In addition, when the communication module 310 transmits and receives data to and from the RF fingerprint management server 400 through the communication network 100 , at least one of the plurality of communication modules 310 is a WLAN (Wireless LAN), Wi-Fi ( Wireless communication methods such as Wi-Fi), Wibro, Wimax, and High Speed Downlink Packet Access (HSDPA) may be used.

In addition, at least one of the plurality of communication modules 310 of the access detection device 300 interworks with the communication network 100 to transmit and receive data to and from the RF fingerprint management server 400 .

The storage module 330 is a device that performs the same function as the storage module 250 of the radio wave generator 200 , and stores the RF fingerprint information received from the radio wave generator 200 or the RF fingerprint management server 400 . Stored in the form of the fingerprint DB 331, and the distance value calculated based on the searched radio signal information and the stored RF fingerprint, the distance value calculated by the distance between the proximity detection device 300 and the radio wave generator 200, the distance value DB (333) format.

Hereinafter, in the description, the distance value stored in the distance value DB will be referred to as a second distance value.

The output module 350 is a device that performs the same function as the output module 230 of the radio wave generator 200, and the access detection device 300 calculated by the access detection device 300 or the RF fingerprint management server 400 ) and a device for displaying the degree of access between the radio wave generator 200 to the user.

Meanwhile, although not shown in FIG. 4 , the approach detecting device 300 also includes an input module (not shown) of the approach detecting device 300 performing the same function as the input module 210 of the radio wave generating device 200 . can do.

In this case, the input module (not shown) of the approach detecting device 300 receives the user's request for detecting the degree of approach with the radio wave generating device 200 and transmits it to the control module 370 .

In addition, in order to provide the user with various information on the degree of access, a request signal regarding the degree of access information desired by the user may be input.

The control module 370 is a device for controlling the overall operation process of the access detection device 300, and the overall operation process of the access detection device 300 controlled by the control module 370 is shown in FIGS. 5 to 6 . Let's take a look at it.

Referring to FIG. 5 , the approach detecting device 300 includes an RF finger according to a combination of two or more radio signals transmitted by the radio wave generating device 200 from at least one radio wave generating device 200 or the RF fingerprint management server 400 . Receive and store the print (S201), and search for a wireless signal in the vicinity of the access detection device 300 (S203).

Thereafter, the searched two or more radio signal information and the pre-stored RF fingerprint are compared ( S205 ), and based on the result, it corresponds to at least one radio wave generating device 200 within a certain radius from the approach detecting device 300 . By extracting the user information, it is determined who the owner of the radio wave generating device 200 that transmits two or more radio signals is (S207).

And, based on the pre-stored RF fingerprint and the searched radio signal information, the degree of access between the access detecting device 300 and the radio wave generating device 200 corresponding to the extracted user information is calculated.

At this time, the calculated index on the degree of approach may include the distance between the approach detecting device 300 and the radio wave generating device 200 and the relative access speed. The value can be calculated, and the first distance value, which is the calculated distance value, the second distance value (previously calculated distance value) stored in the distance value DB 333, and the time difference at which the first and second distance values are calculated Based on the relative approach speed between the approach detecting device 300 and the radio wave generating device 200 can be calculated (S209).

Then, the calculated result is provided to the user of the access detection device 300 through the output module 350 (S211).

On the other hand, the subject calculating the degree of access between the access detection device 300 and the radio wave generating device 200 may be the RF fingerprint management server 400, not the access detection device 300, in this case Referring to FIG. 6 for the operation process of the approach detecting device 300 in the example, the approach detecting device 300 searches for a wireless signal around the approach detecting device 300 (S301), and two or more detected wireless signals The information is transmitted to the RF fingerprint management server 400 (S303).

After that, when the RF fingerprint management server 400 calculates the degree of access between the access detection device 300 and the radio wave generating device 200, that is, the distance between the approach detecting device 300 and the radio wave generating device 200 and When the relative access speed is calculated, it is received and provided to the user through the output module 350 (S305).

As described above, the overall operation process of the approach detecting device 300 according to each embodiment of the present invention may be controlled and executed by the control module 390 of the approach detecting device 300 .

In the above, the configuration and operation method of the approach detecting device 300 according to the present invention has been described.

Hereinafter, the configuration and operation method of the RF fingerprint management server 400 according to the present invention will be described.

7 is a view showing the main configuration of the RF fingerprint management server 400 according to the present invention, Figures 8 to 9 describe the operation process of the RF fingerprint management server 400 according to each embodiment of the present invention. This is a flow chart for

Referring to FIG. 7 , the RF fingerprint management server 400 according to the present invention may include a communication module 410 , a storage module 430 , and a control module 450 .

The communication module 410 is for communicating with the radio wave generating device 200 and the access detecting device 300, and the communication module 410 is a communication network for performing a function such as WLAN (Wireless LAN), Wi-Fi (Wi-Fi) It is preferable to use a wireless communication method such as , Wibro, Wimax, HSDPA (High Speed Downlink Packet Access), but is not limited thereto, and depending on the system implementation method, Ethernet (Ethernet), xDSL (ADSL, Wired communication methods such as VDSL), Hybrid Fiber Coaxial Cable (HFC), Fiber to The Curb (FTTC), and Fiber To The Home (FTTH) may be used.

In particular, in the present invention, the communication module 410 receives an RF fingerprint according to a combination of two or more radio signals from the radio wave generator 200 through the communication network 100, and the received RF fingerprint and access detection device The result of calculating the degree of approach between 300 and the radio wave generating device 200 may be transmitted to the approach detecting device 300 .

The storage module 430 is a device for storing data, and includes a main storage device and an auxiliary storage device, and stores an application program necessary for the functional operation of the RF fingerprint management server 400 . The storage module 430 may largely include a program area and a data area. Here, when the RF fingerprint management server 400 activates each function in response to a user's request, the corresponding application programs are executed under the control of the control module 450 to provide each function.

In particular, in the present invention, the storage module 430 may store an RF fingerprint according to a combination of two or more radio signals received from the radio wave generating device 200 in the form of a fingerprint DB 431 , and the RF fingerprint management server 400 ) calculated by the distance value between the radio wave generating device 200 and the approach detecting device 300 may be stored in the form of a distance value DB 433 .

The distance value stored in the distance value DB 433 is referred to as a second distance value.

The control module 450 controls the overall operation process of the RF fingerprint management server 400 .

Now, with reference to FIGS. 8 to 9 , the function of the control module 450 for controlling the overall operation process of the RF fingerprint management server 400 will be described.

8 to 9 are for explaining different embodiments, respectively, and FIG. 8 shows an embodiment in which the approach detecting device 300 calculates the degree of approach between the approach detecting device 300 and the radio wave generating device 200. For the purpose of explanation, FIG. 9 is for explaining an embodiment in which the RF fingerprint management server 400 calculates the access degree.

First, looking at the operation process of the RF fingerprint management server 400 when the access detection device 300 calculates the degree of access through FIG. 8 , the combination of two or more radio signals from at least one radio wave generating device 200 is The RF fingerprint is received and stored (S401 to S403).

Thereafter, when an RF fingerprint transmission request comes from the access detection device 300 (S405), the RF fingerprint according to the transmission request is transmitted to the access detection device 300 (S407).

Now, an embodiment in which the RF fingerprint management server 400 calculates the degree of access between the access detection device 300 and the radio wave generator 200 will be described with reference to FIG. 9 .

Referring to FIG. 9 , the RF fingerprint management server 400 receives an RF fingerprint according to a combination of two or more radio signals from at least one radio wave generator 200 ( S501 ), and stores the received RF fingerprint ( S501 ). S503).

Then, when the RF fingerprint management server 400 receives two or more radio signal information searched by the access detection device 300 from the access detection device 300 (S505), the pre-stored RF fingerprint and the received two The above wireless signal information is compared (S507), and user information corresponding to at least one radio wave generating device 200 within a predetermined radius from the approach detecting device 300 is extracted based on the comparison result (S509).

That is, based on the comparison result, information on the holder of the at least one radio wave generating device 200 is extracted.

And, based on the received radio signal information and the pre-stored RF fingerprint, the degree of access between the access detecting device 300 and at least one radio wave generating device 200 corresponding to the extracted user information is calculated. The degree may include a distance between the approach detecting device 300 and the radio wave generating device 200 and a relative approach speed at which the radio wave generating device 200 approaches or moves away from the approach detecting device 300 .

At this time, the distance between the approach detecting device 300 and the radio wave generating device 200 is calculated based on the received radio signal information and the pre-stored RF fingerprint, and the calculated distance value is referred to as a first distance value.

In addition, the relative approach speed is determined by the at least one radio wave generating device 200 based on the time difference at which the first distance value and the second distance value stored in the distance value DB 433 and the first and second distance values are calculated. The approach speed for approaching the approach detecting device 300 may be calculated.

Here, the first distance value is a distance value currently calculated by the RF fingerprint management server 400 as described above, and the second distance value is a distance value DB 433 previously calculated by the RF fingerprint management server 400 . It means the distance value stored in .

In addition, as described above, the overall operation process of the RF fingerprint management server 400 is controlled and performed by the control module 450 of the RF fingerprint management server 400 .

Above, the configuration and operation method of the RF fingerprint management server 400 according to the present invention has been described.

10 is a diagram illustrating an operating environment of an apparatus for providing a location search method in a location search service system according to an embodiment of the present invention.

10 and the following description are intended to provide a brief, general description of a suitable computing environment in which the present invention may be implemented.

Although not required, the invention may be described in the context of computer-executable instructions, such as program modules, being executed by a computer system. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer executable instructions, associated data structures, and program modules represent examples of program code means for carrying out the acts of the invention disclosed herein.

Referring to FIG. 10 , an exemplary computing system embodying the present invention connects a processing unit 11 , a system memory 12 , and various system components including the system memory 12 to the processing unit 11 . and a computing device in a form including a system bus (10).

The processing unit 11 is capable of executing computer-executable instructions designed to implement aspects of the present invention.

The system bus 10 may be any of several types of bus structures including a local bus, a peripheral bus, and a memory bus or memory controller using any of a variety of bus architectures. The system memory 12 includes a read only memory (ROM) 12a and a random access memory (RAM) 12b. A basic input/output system (BIOS) 13a containing basic routines that help transfer information between components within the computing system, such as during startup, may be stored generally in ROM 12a.

The computing system may comprise storage means, for example a hard disk drive 15 for reading information from or writing information to, a hard disk drive 15 for reading information from or writing information to, a magnetic disk. may include a magnetic disk drive 16 for writing to, and an optical disk drive 17 for reading information from, or writing information to, an optical disk, such as, for example, a CD-ROM or other optical medium. .

The hard disk drive 15 , the magnetic disk drive 16 , and the optical disk drive 17 are connected to the system by a hard disk drive interface 18 , a magnetic disk drive-interface 19 , and an optical drive interface 20 , respectively. connected to the bus 10 .

In addition, the computing system may further include an external memory 21 as a storage means. The external memory 21 may be connected to the system bus 10 through the input/output interface 24 .

The drives described above and associated computer readable media read and written by the drives provide non-volatile storage of computer executable instructions, data structures, program modules, and other data.

The exemplary environments described herein illustrate hard disk 15, magnetic disk 16 and optical disk 17, but in addition to magnetic cassettes, flash memory cards, DVDs, Bernoulli cartridges, RAM Other tangible computer-readable media for storing data may be used, including , ROM, and the like.

an operating system (13b), one or more application programs (13c), other program modules (13d), and one or more program modules including program data (13c), which are loaded and executed by the processing unit (11) The program code means may be stored in the hard disk 15, magnetic disk 16, optical disk 17, ROM 12a or RAM 12b.

In addition, the computing system may receive commands and information from the user through other input devices 22 such as a keyboard, a pointing device, a microphone, a joystick, a game pad, a scanner, and the like.

These input devices 22 may be connected to the processing unit 11 via an input/output interface 24 coupled to the system bus 10 . The input/output interface 24 is a very flexible interface such as, for example, a serial port interface, a PS/2 interface, a parallel port interface, a USB interface, an Institute of Electrical and Electronics Engineers (IEEE) 1394 interface (ie, a FireWire interface). It can logically represent any of a variety of different interfaces, or even a combination of different interfaces.

In addition, the computing system to which the present invention is applied may further include a display device 26 , such as a monitor or LCD, or an audio device 27 , such as a speaker or microphone, which are connected via the video/audio interface 25 . connected to the system bus 10 . Other peripheral output devices (not shown) may also be connected to the computer system, such as, for example, speakers and printers.

The video/audio interface unit 25 may include a High Definition Multimedia Interface (HDMI), a Graphics Device Interface (GDI), or the like.

Further, a computing system embodying the present invention is connectable to networks such as, for example, office-wide or enterprise-wide computer networks, home networks, intranets, and/or the Internet. Computer systems may exchange data via such networks with external sources, such as, for example, remote computer systems, remote applications, and/or remote databases.

To this end, the computing system to which the present invention is applied includes a network interface 28 that receives data from and/or transmits data to an external source.

In the present invention, such a computing system may transmit and receive information to and from a device located at a remote location through the network interface 28 . For example, when the computing system means the radio wave generating device 200 or the approach detecting device 300 , information may be transmitted and received with the RF fingerprint management server 400 through the network interface 28 . On the other hand, when the computing system refers to the RF fingerprint management server 400 , information may be transmitted and received with the radio wave generator 200 or the access detection device 300 through the network interface 28 .

Network interface 28 may represent, for example, a logical combination of one or more software and/or hardware modules, such as a network interface card and a corresponding Network Driver Interface Specification (“NDIS”) stack.

Likewise, the computer system receives data from, or transmits data to, an external source via input/output interface 24 . The input/output interface 24 may be coupled to a modem 23 (eg, a standard modem, cable modem, or digital subscriber line (“DSL”) modem) through which an external source may be connected. It may receive data from and/or transmit data to an external source.

10 illustrates an operating environment suitable for the present invention, the principles of the present invention may be employed in any system capable of implementing the principles of the present invention, with appropriate modifications, if necessary. The environment depicted in FIG. 10 is exemplary only and does not represent a small fraction of the wide variety of environments in which the principles of the present invention may be implemented.

In addition, various information generated when determining whether to enter the store according to the present invention may be stored and accessed in any computer-readable medium related to the computing system. For example, some of these program modules and some of the associated program data may be stored in the system memory 12 by the operating system 13b, the application program 13c, the program module 13d, and/or the program data. (13e) may be included.

Also, when a mass storage device such as a hard disk is connected to the computing system, such program modules and related program data may be stored in the mass storage device. In a network environment, a program module related to the present invention or a part thereof may be stored in a remote computer system connected through the modem 23 of the input/output interface 24 or the network interface 25 . Execution of these modules may be performed in a distributed environment as described above.

As described above, while this specification contains numerous specific implementation details, these are not to be construed as limiting as to the scope of any invention or claim, but rather as may be specific to particular embodiments of a particular invention. It should be understood as a description of features. Certain features that are described herein in the context of separate embodiments may be implemented in combination in a single embodiment.

Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Furthermore, although features operate in a particular combination and may be initially depicted as claimed as such, one or more features from a claimed combination may in some cases be excluded from the combination, the claimed combination being a sub-combination. or a variant of a sub-combination.

Likewise, although acts are depicted in the figures in a particular order, it should not be understood that such acts must be performed in the specific order or sequential order shown or that all depicted acts must be performed in order to obtain desirable results.

In certain cases, multitasking and parallel processing may be advantageous. Further, the separation of the various system components of the above-described embodiments should not be construed as requiring such separation in all embodiments, and the program components and systems described may generally be integrated together into a single software product or packaged into multiple software products. You have to understand that you can.

Certain embodiments of the subject matter described herein have been described. Other embodiments are within the scope of the following claims. For example, acts recited in the claims may be performed in a different order and still achieve desirable results.

As an example, the processes illustrated in the accompanying drawings do not necessarily require the specific illustrated order or sequential order to achieve desirable results. In certain implementations, multitasking and parallel processing may be advantageous.

The present description sets forth the best mode of the invention, and provides examples to illustrate the invention and to enable any person skilled in the art to make and use the invention. This written specification does not limit the present invention to the specific terms presented.

Accordingly, although the present invention has been described in detail with reference to the above-described examples, those skilled in the art can make modifications, changes and modifications to the examples without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims.

The present invention relates to a method and apparatus for detecting user access based on an RF fingerprint, and more particularly, to generate and store an RF fingerprint of a radio wave generating device that generates two or more radio signals, and the stored RF fingerprint and an approach detecting device The present invention relates to a method and apparatus for calculating the degree of access of a user possessing the radio wave generating device to an approach detecting device by comparing the radio signal information measured at the current location.

According to the present invention, user information corresponding to at least one radio wave generating device within a certain radius is extracted by comparing two or more radio signal information searched by the approach detecting device with a pre-stored RF fingerprint, and the radio signal information and By calculating the degree of access between the radio wave generator and the approach detection device possessed by the user based on the pre-stored RF fingerprint, the RF fingerprint can be used to prevent missing children, prevent the disappearance of the elderly, and prevent the disappearance of dogs. have.

In particular, when calculating the degree of approach, by calculating the distance and speed between the radio wave generating device and the approach detecting device, the user of the approach detecting device determines how far away and at what speed the object being protected is moving away from and approaching. can be identified and the protection target can be effectively protected.

Therefore, the present invention can contribute to the development of the fingerprint industry through the fingerprint-based user access detection method described above, and there is industrial applicability because the possibility of commercialization or sales is sufficient and it can be practically and clearly implemented.

100: communication network 200: radio wave generator 300: access detection device
400: RF fingerprint management server

Claims (10)

a step of detecting, by an approach detecting device, two or more radio signals transmitted by at least one radio wave generating device;
comparing the discovered two or more radio signal information with a pre-stored radio frequency (RF) fingerprint;
By extracting user information corresponding to the at least one radio wave generating device within a predetermined radius from the approach detecting device based on the comparison result, user information of at least one radio wave generating device that transmits two or more radio signals is specified step; and
calculating an access degree between the access detecting device and at least one radio wave generating device in which the user information is specified based on the wireless signal information and the RF fingerprint;
A user access detection method comprising a. ◈Claim 2 was abandoned when paying the registration fee.◈ The method of claim 1, wherein the calculating
A user approach detection method, characterized in that calculating a first distance value that is a distance between the at least one radio wave generating device and the approach detecting device based on the radio signal information and the RF fingerprint. ◈Claim 3 was abandoned when paying the registration fee.◈ The method of claim 2, wherein the calculating
A second distance value that is a distance value between the radio wave generator and the approach detection device calculated before calculating the first distance value, the first distance value, and the at least A user approach detection method, characterized in that calculating the approach speed of one radio wave generator. ◈Claim 4 was abandoned when paying the registration fee.◈ The method of claim 1, wherein, before the step of searching,
receiving and storing an RF fingerprint according to a combination of two or more radio signals transmitted by the radio wave generating device from the at least one radio wave generating device or an RF fingerprint management server;
User access detection method, characterized in that it further comprises. delete delete at least one communication module for detecting one or more wireless signals around the proximity detection device;
a storage module for storing the RF fingerprint generated by the at least one radio wave generator; and
Searching for two or more radio signals transmitted by at least one radio wave generator through the communication module,
Two or more radio signals are transmitted by extracting user information corresponding to the at least one radio wave generating device within a predetermined radius from the approach detecting device based on a result of comparing the searched radio signal information with the stored RF fingerprint. specifying user information of at least one radio wave generating device that
a control module for calculating an access degree between the at least one radio wave generating device in which the user information is specified and the approach detecting device based on the radio signal information and the RF fingerprint;
Approach detection device comprising a. delete delete delete

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