KR20170078073A - Method for estimating of terminal position in building, apparatus and system for the same - Google Patents

Abstract

The present invention relates to a position estimation method, and more particularly, to a position estimation method in a building capable of estimating a user position in a building more accurately than a user position estimation using altitude information measured through an altitude sensor , And an apparatus and a system therefor.
To this end, a method for estimating a position in a building according to an embodiment of the present invention includes a step of setting a reference point for estimating a position of a building, a step of setting inter-layer information by the device, And calculating the user location layer using the altitude value, the altitude value set as the reference point, and the interlayer information.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of estimating a position in a building,

The present invention relates to a position estimation method, and more particularly, to a position estimation method in a building capable of estimating a user position in a building more accurately than a user position estimation using altitude information measured through an altitude sensor , And an apparatus and a system therefor.

The contents described in this section merely provide background information on the present embodiment and do not constitute the prior art.

With the rapid development of building technology and the spread of ICT (Information and Communications Technologies) technology including mobile communication, various activities in the outdoor space are gradually progressing indoors. As a result, the proportion of indoor space in everyday life is gradually increasing, and services that have been provided for outdoor space such as navigation are gradually expanding to indoor space.

In order for various location-based services provided in the indoor space to be successfully constructed and provided, it is necessary to perform a variety of functions such as indoor positioning for determining the position of the user in the indoor space, It is essential to construct information of the form.

Indoor positioning technology can be classified into various types according to required location accuracy, available service area, applicable service, applicable sensor, and the like. For example, based on location accuracy and available service area, a base station, Wi-Fi, Inertial Navigation, High Sensitivity Global Navigation Satellite System (GNSS), Ultra Wide Band (UWB), Raid Fre- quency Identification (RFID) It can be classified as positioning technology using various physical resources such as ultrasonic, infrared, geographical, camera, and WLAN.

Among these various technologies, a positioning technology based on a short-range wireless communication such as Wi-Fi and BLE is a technology applicable to a smartphone that plays a major role in the activation of an indoor location-based service. A base point positioning method for determining the location of the terminal using the position of the AP, a positioning method based on RF (Raid Fre-quency) fingerprinting, a received signal strength, a signal arrival time or a RTT (Round Trip Time) , And a multilateration method for measuring a terminal position from distance information of a Wi-Fi AP.

However, there is a problem that only the latitude and longitude information of the current location of the user can be confirmed by the positioning technology to date, and the user can not know the number of layers when the user is in the building.

Therefore, it is necessary to develop a technique capable of positioning the user more specifically when the user is located in a building.

Korean Patent Publication No. 2010-0069908, published on June 25, 2010 (Name: 2-step location tracking system and method in a multi-story building)

It is an object of the present invention to provide a method of estimating a position in a building, which can more accurately estimate a position of a user in a building, and an apparatus and a system for the same. have.

More particularly, the present invention relates to a method and apparatus for estimating a position of a user based on altitude information measured by an altitude sensor, And an apparatus and a system therefor.

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

According to another aspect of the present invention, there is provided a method for estimating a location in a building, the method comprising: setting a reference point for location estimation; The device setting interlayer information; And calculating the user location layer using the altitude value, the altitude value set as the reference point, and the interlayer information after the apparatus confirms the current altitude value.

At this time, the setting of the reference point may include: checking the current altitude value if the apparatus determines that the user has entered the building; And setting the identified altitude value as a reference point for estimating a position in the building.

At this time, the step of setting the inter-layer information can be set using the inter-layer mean height information set corresponding to the building or using the previously stored layer-by-layer altitude distribution information corresponding to the building.

If the step of setting the inter-layer information uses the previously stored layer-by-layer altitude distribution information, the device confirms the identification information of the building. And setting the interlayer information by checking the past altitude distribution information of the past stored in the building corresponding to the building.

The step of calculating the user location layer may further comprise: the device verifying the current altitude value; Calculating a height at which the apparatus subtracts the altitude value of the reference point from the current altitude value; And a step of the apparatus calculating the user location layer using the calculated height and the interlayer information.

Wherein calculating the user location layer comprises: measuring the current altitude value by the device; Confirming the previously stored floor level altitude distribution information corresponding to the building; And calculating the user location layer by confirming the previously stored floor level altitude distribution information corresponding to the current altitude value by the device.

Further, the present invention can provide a computer readable recording medium on which a program for executing the method of estimating a position in a building as described above is recorded.

According to another aspect of the present invention, there is provided an apparatus for estimating a position in a building, the apparatus comprising: a reference point setting module for setting a reference point for position estimation when the user is determined to have entered the building; An interlayer information setting module for setting interlayer information; And a user location layer calculation module for checking the current altitude value and estimating the user location layer using the altitude value, the altitude value set as the reference point, and the interlayer information.

The sensor information collection module collects sensor information for determining whether to enter the building, and collects information about the altitude value.

At this time, the inter-layer information setting module can set the inter-layer information using the set inter-layer average height information corresponding to the building or using the previously stored layer-specific altitude distribution information corresponding to the building.

In addition, the user location layer calculation module may calculate the height obtained by subtracting the altitude value of the reference point from the ascertained altitude value, and calculate the altitude of the user location layer using the calculated altitude and the set inter- Can be estimated.

According to an aspect of the present invention, there is provided a system for estimating a position in a building, the method including: setting a reference point for position estimation when the user is determined to enter the building; A terminal for confirming a current altitude value and estimating a user location layer using the altitude value, the altitude value set as the reference point, and the interlayer information; And a service apparatus that receives information on the user location layer from the terminal and provides the location information service corresponding to the layer to the terminal.

According to the present invention, there is provided a method of estimating a position in a building, an apparatus and a system therefor, a method of estimating a position of a user by using altitude information measured through an altitude sensor, The accuracy of the position estimation can be enhanced.

In addition, according to the present invention, the position of a user in a building is estimated in consideration of altitude information, reference point, and interlayer information, so that position estimation is possible even when information on a building is unknown.

In addition, according to the implementation method, it is possible to estimate the user position in the building more quickly and more accurately by setting the interlayer information or confirming the information about the building when estimating the user's position.

In addition, various effects other than the above-described effects can be directly or implicitly disclosed in the detailed description according to the embodiment of the present invention to be described later.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a system for a method of estimating a position in a building according to an embodiment of the present invention; FIG.
FIG. 2 is a block diagram illustrating a main configuration of a terminal according to an embodiment of the present invention shown in FIG. 1. Referring to FIG.
3 is a flowchart for schematically explaining a method of estimating a position in a building according to an embodiment of the present invention.
4 is a flowchart illustrating a reference point setting step in a method of estimating a position in a building according to an embodiment of the present invention.
5 is a flowchart illustrating interlayer information setting in a method of estimating a location in a building according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a step of setting interlayer information in a method of estimating a position in a building according to another embodiment of the present invention.
FIG. 7 is a flowchart illustrating an interlayer information setting step in a method of estimating a position in a building according to another embodiment of the present invention.
FIG. 8 is a flowchart for explaining a user location layer calculation step of a location estimation method in a building according to an embodiment of the present invention.
FIG. 9 is a flowchart for explaining a user location layer calculating step in a location estimation method in a building according to another embodiment of the present invention.
10 is a diagram illustrating an operating environment of an apparatus for estimating a position in a building according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the nature and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the following description and drawings are not to be construed in an ordinary sense or a dictionary, and the inventor can properly define his or her invention as a concept of a term to be described in the best way It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

Also, terms including ordinal numbers such as first, second, etc. are used to describe various elements, and are used only for the purpose of distinguishing one element from another, Not used. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.

In addition, when referring to an element as being "connected" or "connected" to another element, it means that it can be connected or connected logically or physically. In other words, it is to be understood that although an element may be directly connected or connected to another element, there may be other elements in between, or indirectly connected or connected.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprising "or" having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

In addition, embodiments within the scope of the present invention include computer-readable media having computer-executable instructions or data structures stored on computer-readable media. Such computer-readable media can be any available media that is accessible by a general purpose or special purpose computer system. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or in the form of computer- But is not limited to, a physical storage medium such as any other medium that can be used to store or communicate certain program code means of the general purpose or special purpose computer system, .

In the following description and claims, the term "network" is defined as one or more data links that enable electronic data to be transmitted between computer systems and / or modules. When the information is transmitted or provided to a computer system via a network or other (wired, wireless, or a combination of wired or wireless) communication connection, the connection may be understood as a computer-readable medium. Computer readable instructions include, for example, instructions and data that cause a general purpose computer system or special purpose computer system to perform a particular function or group of functions. The computer executable instructions may be binary, intermediate format instructions, such as, for example, assembly language, or even source code.

In addition, the invention may be practiced with other computer systems, including personal computers, laptop computers, handheld devices, multiprocessor systems, microprocessor-based or programmable consumer electronics, network PCs, minicomputers, mainframe computers, a pager, and the like. < RTI ID = 0.0 > [0040] < / RTI > The invention may also be practiced in distributed systems environments where both local and remote computer systems linked by a combination of wired data links, wireless data links, or wired and wireless data links over a network perform tasks. In a distributed system environment, program modules may be located in local and remote memory storage devices.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Now, a location estimation method, an apparatus and a system therefor according to an embodiment of the present invention will be described in detail with reference to the drawings.

First, a system for a method of estimating a position in a building according to an embodiment of the present invention will be described.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a system for a method of estimating a position in a building according to an embodiment of the present invention; FIG.

Referring to FIG. 1, a system for a location estimation method in a building according to an embodiment of the present invention may include a terminal 100 and a service device 200. In addition, the system of the present invention may be configured to include a communication network 300 that supports transmission and reception of information between the terminal 100 and the service apparatus 200.

First, the terminal 100 refers to a user apparatus that can transmit and receive various data via the communication network 300 according to a user's operation. The terminal 100 can perform voice or data communication through the communication network 300 and transmit / receive various information to / from the service device 200. To this end, the terminal 100 of the present invention may include a browser for transmitting and receiving information, a memory for storing programs and protocols, and a microprocessor for executing and controlling various programs.

In particular, the terminal 100 according to an exemplary embodiment of the present invention transmits various information measured for current position estimation to the service device 200 through the communication network 300, It is possible to receive various services and to transmit information on the current position estimated by the terminal 100 such as the number of layers to the service apparatus 200 through the communication network 300 and to transmit the current position Various related services can be provided in response to the request.

To this end, the terminal 100 of the present invention sets a reference point for location estimation, sets the interlayer information, and calculates the current user location layer in the building using the current altitude information, reference point, and interlayer information .

More specifically, an operation method in the terminal 100 will be described later, and the terminal 100 according to the embodiment of the present invention can be implemented in various forms. For example, the terminal 100 described in the present specification may be a mobile terminal such as a smart phone, a tablet PC, a PDA (personal digital assistant), a portable multimedia player (PMP) , A smart TV, a desktop computer, etc. may be used.

The terminal 100 according to the present invention can not enumerate all of the variations of the portable apparatus according to the convergence trend of the digital apparatus. However, when the unit of the same level as the above- Any device capable of transmitting and receiving information with the service device 200 through the communication network 300 is applicable to the terminal 100 of the present invention.

The service device 200 means a device supporting the position estimation method according to the embodiment of the present invention. In particular, the service device 200 according to the embodiment of the present invention can provide the location information related service corresponding to the terminal 100 to the terminal 100 when the location of the terminal 100 is confirmed.

For example, if it is determined that the terminal 100 is located in the third floor of the building, the service device 200 confirms the security information set corresponding to the third floor of the building, Or to activate only some of the functions. Also, if it is confirmed that the terminal 100 has moved to the fourth floor in the building, the service device 200 of the present invention may provide the main announcements in the fourth floor in the form of a pop-up message of the terminal 100. [

As described above, the service apparatus 200 of the present invention confirms the position of the terminal 100 and provides various information accordingly.

In order to perform this process, the service apparatus 200 of the present invention collects various information for estimating the position of the terminal 100 from the terminal 100, sets a reference point for position estimation using the terminal 100, The current user location layer in the building can be calculated using the current altitude information, the reference point, and the interlayer information, and various location information related services corresponding to the corresponding layer can be provided. Also, the service apparatus 200 of the present invention may receive positional information estimated by the terminal 100 and perform an operation corresponding thereto.

The service apparatus 200 of the present invention can store and manage various information for performing the operations as described above. For example, it is possible to store and manage the basic information, the floor information, and the like of the building, and various information generated for processing the embodiment of the present invention, such as managing user information on the terminal 100 or performing user authentication And the like.

The main configuration and operation method of the terminal 100 and the service apparatus 200 will be described in more detail below. A processor mounted in each apparatus according to the embodiment of the present invention includes a program command for executing the method according to the present invention Lt; / RTI > In one implementation, the processor may be a single-threaded processor, and in other embodiments, the processor may be a multithreaded processor. Further, the processor is capable of processing instructions stored on a memory or storage device.

The terminal 100 and the service device 200 according to the embodiment of the present invention transmit and receive various information related to the communication through the communication network 300. The communication network 300 at this time includes a wireless LAN (WLAN), a Wi- It is preferable to use a wireless communication method such as WiFi, WiBro, Wimax, HSDPA, etc. However, the present invention is not limited to this, (ADSL, VDSL), Hybrid Fiber Coaxial Cable (HFC), Fiber To The Curb (FTTC), and Fiber To The Home (FTTH).

The communication network 300 of the present invention includes, for example, a plurality of access networks (not shown) and a core network (not shown), and may include an external network such as an Internet network (not shown). Here, the access network (not shown) is an access network that performs wired / wireless communication with the terminal 100 and includes a plurality of base stations such as a BS (Base Station), a BTS (Base Transceiver Station), a NodeB, an eNodeB, A base station controller, and a radio network controller (RNC). Also, as described above, the digital signal processing unit and the radio signal processing unit integrally implemented in the base station are divided into digital units (hereinafter, referred to as DUs and radio units (RUs) A plurality of RUs (not shown) may be provided in each of a plurality of areas, and a plurality of RUs (not shown) may be connected to a centralized DU (not shown).

A core network (not shown) constituting a mobile network together with an access network (not shown) performs a role of connecting an access network (not shown) and an external network (not shown), for example, an Internet network (not shown).

As described above, the core network (not shown) is a network system that performs main functions for mobile communication services such as mobility control and switching between access networks (not shown), and includes a circuit switching or a packet exchange and manages and controls the packet flow in the mobile network. The core network (not shown) manages inter-frequency mobility and plays a role for interworking with traffic in an access network (not shown) and a core network (not shown) and other networks such as the Internet It is possible. Such a core network (not shown) may further include an SGW (Serving Gate Way), a PGW (PDN GateWay), an MSC (Mobile Switching Center), a HLR (Home Location Register), a MME (Mobile Mobility Entity) .

The Internet network (not shown) refers to a public network, that is, a public network, in which information is exchanged according to the TCP / IP protocol. The Internet network is connected to the service apparatus 200, (Not shown) and an access network (not shown) to the terminal 100. The information provided from the terminal 100 may be transmitted to the terminal 100 through an access network (not shown) and a core network (not shown) To the device (200).

Hereinafter, the main configuration and operation method of the terminal 100 according to the embodiment of the present invention will be described.

FIG. 2 is a block diagram illustrating a main configuration of a terminal according to an embodiment of the present invention shown in FIG. 1. Referring to FIG.

1 and 2, a terminal 100 according to an embodiment of the present invention includes a sensor information collection module 110, a reference point setting module 120, an interlayer information setting module 130, and a user location layer calculation module 140).

Here, 'module' is a component that performs a predetermined function, and may be implemented by hardware, software, or a combination of hardware and software. For example, the 'module' may refer to a program module, which may be software components executed by a processor to perform certain functions, object-oriented software components, class components, Data, databases, data structures, tables, arrays, data structures, and the like, such as, for example, , And variables. In addition, the functions provided in the components and 'modules' may be combined into a smaller number of components and '~ modules' or further separated into additional components and 'modules'.

Each of the modules constituting the terminal 100 of the present invention will be described in more detail. The sensor information collection module 110 collects necessary information using various hardware sensor resources. For example, the sensor information collection module 110 may include an illuminance sensor and may collect information about a change in brightness around the user through the illuminance sensor. In addition, the sensor information collection module 110 may include a microphone and collect information about ambient noise.

The sensor information collection module 110 may collect information about the beacon signal using the wireless communication device. The sensor information collection module 110 may include a temperature sensor and collect temperature information such as a temperature change using a temperature sensor. In addition, the sensor information collection module 110 of the present invention includes an altitude sensor, and an elevation value for the current altitude can be collected using the altitude sensor.

The sensor information that can be collected by the sensor information collection module 110 is not limited to the above example, but may be sensed and collected according to the embodiment of the present invention.

The reference point setting module 120 sets a reference point for the position estimation of the present invention. The reference point setting module 120 may first use the information collected through the sensor information collection module 110 to determine that the user has entered the building outdoors.

For example, if the current date and time information is collected through the sensor information collection module 110 and the outdoor temperature is generally higher in summer, the temperature information collected through the sensor information collection module 110 is When the temperature changes from a high temperature to a low temperature, the reference point setting module 120 may determine that the user has moved from the outside to the inside. Also, when the current time collected through the sensor information collection module 110 is noon and the illuminance value measured through the illuminance sensor changes from bright to dark, the reference point setting module 120 determines that the user has moved from the outdoor to the indoor . When the terminal 100 of the present invention uses the beacon signal, the beacon signal to be sensed is transmitted to the service device 200, the beacon signal corresponding to the beacon signal is checked, , The reference point setting module 120 may determine that the user has moved from the outside to the inside of the room. At this time, the reference point setting module 120 sets various criteria for determining whether the user has moved from the outside to the inside of the room, and the condition can be flexibly changed according to the hardware resources provided in the terminal 100. [

In addition, at least one sensor information may be used as information required in the process of collecting the sensor information of the present invention or in the process of determining whether the sensor has moved to the room from the outside, or may be determined by considering two or more sensor information .

If the sensor information acquisition module 110 determines that the user has entered the room or entered the building through the above process, the reference point setting module 120 requests the sensor information collection module 110 to measure the altitude value, The altitude value measured through the reference point is set as a reference point. Here, the reference point means a first floor in a building.

The interlayer information setting module 130 serves to set interlayer information on the height between the layer and the layer. Here, the inter-layer information means the inter-layer mean height information or the layer-by-layer altitude distribution information. Further, the inter-layer information of the present invention can be set by using the inter-layer average height of the statistically calculated building. For example, if the average inter-story height of a building constructed within the past 5 years is 2.7 m, the inter-layer information setting module 130 of the present invention checks property information (e.g., establishment year, etc.) about the building and confirms it to a building built within 5 years The interlayer information can be set to 2.7 m, which is the average interlayer height. The interlayer information setting module 130 of the present invention periodically requests the sensor information collection module 110 to measure altitude values and may adjust or set the interlayer information in consideration of the periodically measured altitude value and the average interlayer height have.

In addition, the sensor information collection module 110 can identify the past altitude values and generate the interlayer information using the generated altitude distribution information. For example, assuming that an altitude value at a location estimated at three layers in the same building is 5.4 m and an altitude value at a location estimated at four layers is 8.1 m, the interlayer information setting module 130 uses this value Interlayer information can be set. At this time, the inter-layer information setting module 130 may set the inter-layer information using the information measured at the other terminal in the corresponding building in cooperation with the service device 200. [

The user location layer calculation module 140 may use the inter-layer information set through the reference point set through the reference point setting module 120 and the inter-floor information setting module 130 and the current altitude value collected through the sensor information collection module 110 And calculates the number of layers that the user is currently located.

More specifically, the user location layer calculation module 140 of the present invention requests the sensor information collection module 110 to measure the current altitude value. Where the user location layer calculation module 140 may be measured after a predetermined time has elapsed since the user entered the building or may be measured at the occurrence of a specific event. For example, when a designated event such as a specific application is activated after the user enters the building, the user location layer calculation module 140 calculates the current altitude value measurement .

When the current altitude value is received from the sensor information collection module 110, the user location layer calculation module 140 of the present invention calculates the altitude value set as the reference, i.e., the first layer, by the reference point setting module 120 at the current altitude value And subtracts the height.

Then, the user location layer calculation module 140 may calculate the layer where the current user is located by dividing the height obtained by subtracting the altitude value set as the reference from the current altitude value by the interlayer average height. For example, assuming that the altitude value is 50m, the altitude value set as the reference is 5m, and the average altitude between the layers is 5m, the height 45m minus the altitude value set as the reference from the current altitude value is divided by 5m, The user location layer calculation module 140 can confirm that the user of the terminal 100 is currently located at the ninth floor.

In addition, the user location layer calculation module 140 of the present invention may extract corresponding layer information by comparing with the layer-by-layer altitude distribution information. In other words, the number of user location layers can be confirmed using past data. The user location layer calculation module 140 determines whether there is user location layer calculation information stored corresponding to the past building. At this time, the user location layer calculation module 140 of the present invention can use the information stored therein and can use the past data in conjunction with the service device 200. [

The user location layer calculation module 140 extracts the corresponding layer information using the past altitude value information. For example, when the current altitude value is 50 m and the layer information corresponding to 50 m exists in the past, Can be calculated to the user location layer. In this case, the user location layer calculation module 140 may set a range value in consideration of the sensor sensitivity collected by the sensor information collection module 110. For example, Layer information corresponding to the height may be used as the layer information corresponding to the current altitude value of 50 m if the corresponding information exists within a certain range such as 48 m within a certain range even if there is no layer information corresponding to 50 m.

If the current location layer of the user is identified through the above process, the user location layer calculation module 140 stores the current location layer and can utilize it when estimating the future location.

The main configuration and operation of the terminal 100 according to the embodiment of the present invention have been described above.

The terminal 100 of the present invention may further include a module (not shown) capable of interlocking with the service apparatus 200, although not shown in the drawings. In the location estimation method May be transmitted to the service apparatus 200 and the corresponding service may be provided from the service apparatus 200. [ The terminal 100 of the present invention may further include a module (not shown) for supporting access and management of information stored in the storage device. The terminal 100 may store and manage past measurement information through the module, And may store and manage the measured floor-level altitude distribution information. In addition, various information generated when the operation of the present invention is performed can be stored and managed.

The specific operation of the terminal 100 according to the embodiment of the present invention will be more clearly understood through the following flowcharts.

Although the method of estimating a position in a building according to an embodiment of the present invention is based on operation in the terminal 100, the present invention is not limited thereto. Or the interworking between the terminal 100 and the service device 200. For example, the terminal 100 transmits various kinds of information required for location estimation in a building to the service device 200 via the communication network 300, and the service device 200 transmits, And then transmits corresponding resultant information including the resultant value to the terminal 100.

In this case, when the service device 200 of the present invention plays a role of estimating the position of a user of the terminal 100 in a building, the service device 200 of the present invention may also include the sensor information collection module 110, A reference point setting module 120, an interlayer information setting module 130, and a user location layer calculating module 140. [ At this time, the sensor information collection module 110 included in the service device 200 may request or receive the sensor information measurement to the terminal 100 or collect various sensor information measured by the terminal 100 have. In addition, the service apparatus 200 of the present invention may include a terminal interworking module (not shown) for supporting transmission and reception of information with the terminal 100, Module. ≪ / RTI >

In addition, the terminal 100 of the present invention estimates the position in the building through the process described above, and requests the service apparatus 200 for the inter-layer mean height information to improve the accuracy of the position estimation, To the service device 200 or to request the information measured by another terminal in the building to the service device 200. The terminal 100 may estimate the location based on the request.

Hereinafter, for convenience of explanation, it is assumed that the operation of the present invention is performed around the terminal 100, and if necessary, it is assumed that the terminal 100 is interlocked with the service apparatus 200, but it is not necessarily limited thereto.

Hereinafter, a method of estimating a position in a building according to an embodiment of the present invention will be described.

3 is a flowchart for schematically explaining a method of estimating a position in a building according to an embodiment of the present invention.

As described above, a method of estimating a position in a building according to an embodiment of the present invention may be performed by the terminal 100 and may be performed by the service apparatus 200, as described above with reference to FIG. Also, it may be performed through interworking between the terminal 100 and the service device 200.

The location estimation method in the building is performed by a device that executes a method of estimating a location in a building. The device refers to the terminal 100, the service device 200, Service device 200 may be interlocked with each other.

Hereinafter, embodiments of the present invention will be described with reference to what is performed by the terminal 100, but the present invention is not limited thereto.

Referring to FIG. 3, a method for estimating a location in a building according to an embodiment of the present invention is executed by an apparatus for executing a method for estimating a location in a building, and includes a reference point setting step S100 (Step S300) of calculating a user location layer by using the inter-layer information, the inter-layer information setting step S200, the altitude value after confirming the current altitude value, the altitude value set as the reference point, . ≪ / RTI >

A method of estimating a position in a building according to an embodiment of the present invention will be described in more detail with reference to FIGS. 4 to 9. FIG.

4 is a flowchart illustrating a reference point setting step in a method of estimating a location in a building according to an embodiment of the present invention.

Referring to FIGS. 1 and 4, an apparatus for performing a method of estimating a position in a building of the present invention, for example, a terminal 100, includes various sensor sensor resources To collect sensor information (S101).

Here, the sensor information collected at a predetermined periodic unit is used to determine whether the user has entered the room from outside the room, that is, the building. For example, the sensor information collects information about the change in the brightness around the user, Or information on the temperature change can be collected.

Then, the reference point setting module 120 of the terminal 100 judges whether the user has moved from the outside to the room based on this (S103).

At this time, the reference point setting module 120 of the terminal 100 may request and collect various sensor information necessary for determining whether the user has moved from the outside to the inside of the room by the sensor information collection module 110. For example, And the time information is collected. In the case of the summer day, generally, since the outdoor temperature is higher, when the temperature changes from a high temperature to a low temperature, it can be judged that the user has moved from the outside to the inside. Also, when the current time is noon and the illuminance value measured through the illuminance sensor changes from bright to dark, the reference point setting module 120 of the terminal 100 may determine that the user has moved from the outside to the inside.

When the terminal 100 of the present invention can receive the beacon signal, the reference point setting module 120 transmits the beacon signal sensed by the sensor information collecting module 110 to the service device 200, When the position information corresponding to the signal is received from the service device 200, it is confirmed that the beacon signal is sensed and it can be determined that the beacon signal is moved from the outdoors to the room.

In addition, the reference point setting module 120 may set various criteria for determining whether the user of the terminal 100 has moved from the outside to the inside of the room. Here, the criterion may be set by the user and may be set by the service apparatus 200. [ In addition, the conditions can be changed flexibly according to hardware resources provided in the terminal 100. [ In addition, at least one sensor information may be used as information required in the process of collecting the sensor information of the present invention or in the process of determining whether the sensor has moved to the room from the outside, or may be determined by considering two or more sensor information .

If it is determined that the user has entered the room from the outside through the above process, the reference point setting module 120 of the terminal 100 requests the sensor information collection module 110 to measure the altitude value, The module 110 measures the altitude value with respect to the current height using the altitude sensor (S105).

Then, the reference point setting module 120 of the terminal 100 sets the measured altitude value as a reference point when the measured altitude value is transmitted through the sensor information collection module 110 (S107). Here, the reference point means a first floor in a building.

The following process will be described with reference to Figs. 5 to 7. Fig.

FIG. 5 is a flowchart for explaining a step of setting interlayer information in a method of estimating a position in a building according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating a method of estimating a position in a building according to another embodiment of the present invention. FIG. 7 is a flowchart illustrating an interlayer information setting step in a method of estimating a position in a building according to another embodiment of the present invention. Referring to FIG.

Referring to FIG. 1 and FIG. 5, the interlayer information setting module 130 of the terminal 100 of the present invention sets interlayer information after a reference point is set through the reference point setting module 120. At this time, the interlayer information setting module 130 of the terminal 100 can request and receive interlayer average height information from the service device 200 (S201).

The interlayer information setting module 130 of the terminal 100 can set the received interlayer average height information as interlayer information when the interlayer average height information is received from the service device 200. [

More specifically, in general, a building calculates the number of floors as one floor every 4 meters according to the building method, but since the average height of the interlayer may vary depending on the trend of the actual construction or other various reasons, The interlayer information setting module 130 of the inter-layer information setting module 130 requests the inter-layer mean height information to the service device 200, receives information on the inter-layer mean height information, and sets it as interlayer information, instead of simply setting the legally determined height as the inter- A more accurate inter-layer average height can be confirmed.

In addition, the inter-layer information setting module 130 of the terminal 100 of the present invention checks whether there is a beacon signal received when entering the building through the sensor information collection module 110, and if there is a beacon signal, And transmits the extracted beacon identification information to the service apparatus 200. FIG. Then, the service apparatus 200 confirms the building information and attribute information corresponding to the beacon signal, and can more accurately confirm the inter-averaged average height information, and then provide the information to the terminal 100.

On the other hand, the terminal 100 of the present invention may measure the altitude value in units of a fixed period and set interlayer information on the basis of the altitude value.

Referring to FIG. 6, after the reference point is set through the reference point setting module 120, that is, after the initial altitude value is measured, The information collection module 110 measures the current altitude value after a predetermined time (S211).

The interlayer information setting module 130 of the terminal 100 checks the difference between the previous altitude value and the current altitude value measured through the sensor information collection module 110 in step S213. This can be set as interlayer information (S215). For example, when the user goes up from the first floor to the second floor, the terminal 100 measures the altitude value after a predetermined time set in consideration of the time taken to walk on the average floor after measuring the first altitude value, The difference between the altitude value and the previous altitude value can be set as the interlayer information.

The interlayer information setting module 130 of the terminal 100 of the present invention calculates the current altitude value after setting the reference point and divides the height obtained by subtracting the previous altitude value from the current altitude value by the interlayer average height information, It can also be set. This process is performed in a constant cycle unit, so that a more accurate interlayer average height can be calculated.

In addition, the interlayer information setting module 130 of the terminal 100 of the present invention may set interlayer information using past information.

Referring to FIG. 7, as shown in FIG. 7, the interlayer information setting module 130 of the terminal 100 of the present invention checks whether past user location layer calculation information exists (S221). At this time, the interlayer information setting module 130 of the terminal 100 of the present invention confirms the building information corresponding to the building identification information, for example, the beacon signal information of the beacon signals collected in the building, It is possible to check whether there is past stored measurement information or interlayer information.

At this time, the information for confirming the building information may include not only a beacon signal but also various information that can be generated in the building. For example, the information for building access authentication generated when a building is in or out, Such as the payment information of the building, and confirm the past data based on the information.

In addition, the interlayer information setting module 130 of the terminal 100 of the present invention can transmit information for recognizing a building to the service device 200 and receive past data from the service device 200, , The information measured by other users in the building may be used.

That is, the interlayer information setting module 130 of the terminal 100 of the present invention transmits information for identifying the building to the service device 200, and the service device 200 receiving the information transmits the information To verify that the information exists. For example, if the information measured by the user A is '8 layers, 21.6 meters', the inter-vehicle average height can be confirmed by comparing the altitude with the reference point measured by the terminal 100, To the terminal 100 and the interlayer information setting module 130 of the terminal 100 can set it as interlayer information on the basis of this information (S223).

The following process will be described with reference to Figs. 8 and 9. Fig.

FIG. 8 is a flowchart for explaining a user location layer calculating step of a location estimation method in a building according to an embodiment of the present invention. FIG. 9 is a flowchart illustrating a method of estimating a location in a building according to another embodiment of the present invention And a step of calculating the user location layer.

Referring to FIG. 8, the user location layer calculation module 140 of the terminal 100 of the present invention requests the sensor information collection module 110 to measure the altitude value, and the sensor information collection module 110 obtains the altitude value (S301). Here, the step of measuring the current altitude value may be measured after a predetermined time elapses after the user of the terminal 100 enters the building.

When the current altitude value is transmitted from the sensor information collection module 110, the user location layer calculation module 140 of the terminal 100 of the present invention calculates the altitude of the reference point measured in step S105 of FIG. 4 The height obtained by subtracting the value is confirmed (S303).

The user location layer calculation module 140 of the terminal 100 may calculate the layer where the current user is located by dividing the height obtained by subtracting the altitude value set as the reference from the current altitude value by the interlayer average height in operation S305. For example, assuming that the current altitude value is 50 m, the altitude value set as the reference is 5 m, and the inter-averaged mean altitude is 5 m, the user location layer calculation module 140 calculates the current altitude value by subtracting the altitude value set as the reference from the current altitude value, Is divided into 5m, which is the average height of the interlayer, to confirm that the user of the terminal 100 is currently located at the 9th floor.

In addition, the user location layer calculation module 140 of the terminal 100 of the present invention may check the number of user location layers using past data.

Referring to FIG. 9, the user location layer calculation module 140 of the terminal 100 of the present invention determines whether there is user location layer calculation information stored corresponding to the past building (S311). At this time, the user location layer calculation module 140 of the terminal 100 of the present invention may use the information stored therein and may use the past data in conjunction with the service device 200. [

The user location layer calculation module 140 of the terminal 100 may extract corresponding layer information using past altitude value information (S313). For example, if the current altitude value is 50 m and layer information corresponding to 50 m exists in the past, the user location layer calculation module 140 may calculate the corresponding layer information to the user location layer (S315).

In this case, the user location layer calculation module 140 may set a range value in consideration of the sensor sensitivity of the terminal 100. For example, in the user location layer calculation module 140 of the terminal 100, Layer information corresponding to the height may be used as the layer information corresponding to the current altitude value of 50 m if the corresponding information exists within a certain range such as 48 m within a certain range even if there is no layer information corresponding to 50 m.

When the current location layer of the user is identified through the above process, the user location layer calculation module 140 of the terminal 100 stores the current location layer and can utilize it when estimating the future location.

According to the method for estimating a position in a building according to an embodiment of the present invention, by using altitude information measured through an altitude sensor, the position of the user is estimated by considering the reference point and the inter- The accuracy of the position estimation can be enhanced.

In addition, according to the present invention, the position of a user in a building is estimated in consideration of altitude information, reference point, and interlayer information, so that position estimation is possible even when information on a building is unknown.

In addition, according to the implementation method, it is possible to estimate the user position in the building more quickly and more accurately by setting the interlayer information or confirming the information about the building when estimating the user's position.

 The method of estimating a position in a building according to an embodiment of the present invention has been described above.

The method of estimating a location in a building according to an embodiment of the present invention as described above may be provided in the form of a computer readable medium suitable for storing computer program instructions and data. A program recorded in a recording medium for implementing a method for estimating a position in a building according to an embodiment of the present invention is an apparatus for estimating a position in a building, A step of setting the inter-layer information by the device, and a step of calculating a user location layer using the altitude value, the altitude value set to the reference point, and the inter-layer information, which are confirmed after the device confirms the current altitude value .

At this time, the program recorded on the recording medium can be read and installed in the computer and executed, thereby executing the above-described functions.

In order to allow a computer to read a program recorded on a recording medium and to execute functions implemented by the program, the above-mentioned program may be stored in a computer-readable medium such as C, C ++, JAVA, machine language, and the like.

The code may include a function code related to a function or the like that defines the functions described above and may include an execution procedure related control code necessary for the processor of the computer to execute the functions described above according to a predetermined procedure. In addition, such code may further include memory reference related code as to what additional information or media needed to cause the processor of the computer to execute the aforementioned functions should be referenced at any location (address) of the internal or external memory of the computer . In addition, when a processor of a computer needs to communicate with any other computer or server that is remote to execute the above-described functions, the code may be stored in a memory of the computer using a communication module of the computer, It may further include a communication-related code such as how to communicate with another computer or a server, and what information or media should be transmitted or received during communication.

Such computer-readable media suitable for storing computer program instructions and data include, for example, magnetic media such as hard disks, floppy disks and magnetic tape, compact disk read only memory (CD-ROM) Optical media such as a DVD (Digital Video Disk), a magneto-optical medium such as a floppy disk, and a ROM (Read Only Memory), a RAM , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), and EEPROM (Electrically Erasable Programmable ROM). The processor and memory may be supplemented by, or incorporated in, special purpose logic circuits.

The computer readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. The functional program for implementing the present invention and the related code and code segment may be implemented by programmers in the technical field of the present invention in consideration of the system environment of the computer that reads the recording medium and executes the program, Or may be easily modified or modified by the user.

Each step according to embodiments of the present invention may be implemented by a computer-executable instruction and executed by a computing system. As used herein, a "computing system" is defined as one or more software modules, one or more hardware modules, or a combination thereof that operate in conjunction with performing an operation on electronic data. For example, the definition of a computer system includes a software module such as a personal computer's operating system and a hardware component of a personal computer. The physical layout of the module is not important. The computer system may include one or more computers connected through a network.

Likewise, a computing system may be implemented in a single physical device in which an internal module, such as a memory and a processor, operates in conjunction with performing an operation on the electronic data.

That is, an apparatus for estimating a position in a building according to the present invention can be implemented to perform the above-described embodiments based on a computing system described below.

10 is a diagram illustrating an operating environment of an apparatus for estimating a position in a building according to an embodiment of the present invention.

Figure 10 and the following discussion are intended to provide a brief, general description of a suitable computing environment in which the invention may be implemented. Although not required, the invention may be described in connection with 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. The computer executable instructions, associated data structures, and program modules illustrate examples of program code means for carrying out the acts of the invention disclosed herein.

10, an exemplary computing system embodying the present invention includes a processing unit 11, a system memory 12, and various system components including the system memory 12 connected to the processing unit 11 And a system bus 10 for communicating with the system.

The processing unit 11 may execute computer-executable instructions designed to implement the features 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 ROM (Read Only Memory) 12a and a RAM (Random Access Memory) 12b. A basic input / output system (BIOS) 13a, containing the basic routines that help to transfer information between components within a computing system, such as during start-up, may generally be stored in ROM 12a.

The computing system may include storage means, for example, a hard disk drive 15 that reads information from, or writes information to, the hard disk, reads information from, or writes information to, And an optical disk drive 17 that reads information from, or writes information to, an optical disk such as, for example, a CD-ROM or other optical media . The hard disk drive 15, the magnetic disk drive 16 and the optical disk drive 17 are connected by a hard disk drive interface 18, a magnetic disk drive-interface 19 and an optical drive interface 20, respectively, And is connected to the bus 10.

Further, 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 an input /

The above-described drives and their associated computer-readable media readable and writable by the drives provide non-volatile storage of computer-executable instructions, data structures, program modules and other data. The exemplary environment described herein illustrates a hard disk 15, magnetic disk 16 and optical disk 17, but may also include magnetic cassettes, flash memory cards, DVDs, Bernoulli cartridges, RAMs Other types of computer readable media for storing data, including ROM, ROM, etc., may be used.

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

In addition, the computing system may receive commands and information from a user through other input devices 22 such as a keyboard, a pointing device, a microphone, a joystick, a game pad, a scanner, These input devices 22 may be connected to the processing unit 11 via an input / output interface 24 connected to the system bus 10. The input / output interface 24 may be, for example, a serial interface such as 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 (i.e., FireWire interface) Any of a variety of different interfaces can be represented logically, or even combinations of different interfaces can be represented logically.

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 may be connected via a video / audio interface 25 And is connected to the system bus 10. For example, other peripheral output devices (not shown), such as speakers and printers, may also be connected to the computer system 420. The video / audio interface unit 25 may include a high definition multimedia interface (HDMI), a graphics device interface (GDI), or the like.

Further, the computing system embodying the invention is connectable to a network such as, for example, an office-wide or enterprise-wide computer network, a home network, an intranet, and / or the Internet. The computer system may exchange data with external sources such as, for example, a remote computer system, a remote application, and / or a remote database.

To this end, a computing system to which the present invention is applied includes a network interface 27 for receiving data from an external source and / or for transmitting data to an external source.

In the present invention, such a computing system can transmit and receive information to and from a remote device via the network interface 27. [

For example, when the computing system refers to the terminal 100, information can be exchanged with the service device 200 through the network interface 27. [ On the other hand, when the computing system refers to the service apparatus 200, information can be exchanged with the terminal 100 through the network interface 27. The network interface 27 may be represented by a logical combination of one or more software and / or hardware modules, such as, for example, a network interface card and a corresponding Network Driver Interface Specification ("NDIS") stack.

Likewise, the computer system receives data from an external source via the input / output interface 24 or transmits data to an external source. Output interface 24 may be coupled to a modem 23 (e.g., a standard modem, a cable modem, or a digital subscriber line (" DSL ") modem) Lt; / RTI > and / or transmit data to an external source.

Although FIG. 10 shows an operating environment suitable for the present invention, the principles of the present invention may be employed with any system that can implement the principles of the present invention, with appropriate modifications if necessary. The environment shown in Figure 10 is merely illustrative and does not represent a small portion of the very diverse environment in which the principles of the present invention may be implemented.

In addition, the program of the present invention and various information generated during execution of the program can be stored and accessed in any computer-readable medium related to the computing system as shown in Fig. For example, a portion of these program modules and a portion of the associated program data may be stored in the system memory 12, such as in the operating system 13b, the application program 13c, the program module 13d, and / (13e).

Further, 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 networked environment, program modules associated with the present invention, or portions thereof, may be connected to a remote computer system, such as terminal 100 and service device 200, connected via a modem 23 or network interface 25 of input / Such as system memory and / or mass storage devices associated with the computing system of the computer system. The execution of such a module can be performed in a distributed environment as described above.

As described above, the present specification contains details of a number of specific implementations, but they should not be construed as being limitations on the scope of any invention or claimability, but rather on the particular embodiment of a particular invention But should be understood as an explanation of the features. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

Certain embodiments of the subject matter described herein have been described. Other embodiments are within the scope of the following claims. For example, the operations recited in the claims may be performed in a different order and still achieve desirable results. By way of example, the process illustrated in the accompanying drawings does not necessarily require that particular illustrated or sequential order to obtain the desired results. In certain implementations, multitasking and parallel processing may be advantageous.

The description sets forth the best mode of the invention, and is provided to illustrate the invention and to enable those skilled in the art to make and use the invention. The written description is not intended to limit the invention to the specific terminology presented. Thus, while the present invention has been described in detail with reference to the above examples, those skilled in the art will be able to make adaptations, modifications, and variations on these examples without departing from the scope of the present invention.

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

The present invention relates to a position estimation method, and more particularly, to a position estimation method in a building capable of estimating a user position in a building more accurately than a user position estimation using altitude information measured through an altitude sensor , And an apparatus and a system therefor.

According to the present invention, the accuracy of the position estimation can be enhanced compared to the case where only the altitude information is used by estimating the position of the user in consideration of the reference point and the interlayer information at the time of position estimation using the altitude information measured through the altitude sensor. It can contribute to the development of the location service industry.

In addition, since the present invention is not only possible to be marketed or operated, but also can be practically and practically carried out, it is industrially applicable.

100: terminal
110: sensor information collection module
120: Reference point setting module
130: interlayer information setting module
140: User location layer calculation module
200: Service device
300: Network

Claims (12)

An apparatus for location estimation in a building,
The device setting a reference point for position estimation;
The device setting interlayer information; And
Calculating a user location layer using the altitude value, the altitude value set as the reference point, and the interlayer information after the device confirms the current altitude value;
And estimating a position in the building. The method according to claim 1,
The step of setting the reference point
If the device determines that the user has entered the building, checking the current altitude value; And
Setting the determined altitude value as a reference point for estimating a position in the building;
And estimating a position in the building. The method according to claim 1,
The step of setting the interlayer information
Using the inter-layer mean height information set corresponding to the building, or using the previously stored past altitude distribution information for each building in correspondence with the building. The method of claim 3,
When the step of setting the inter-layer information uses the previously stored layer-by-layer altitude distribution information,
Confirming identification information for the building by the device; And
Setting the inter-layer information by checking the previously stored layer-by-layer altitude distribution information corresponding to the building;
And estimating a position in the building. The method according to claim 1,
The step of calculating the user location layer
The device verifying the current altitude value;
Calculating a height at which the apparatus subtracts the altitude value of the reference point from the current altitude value; And
The apparatus calculating a user location layer using the calculated height and interlayer information;
And estimating a position in the building. The method according to claim 1,
The step of calculating the user location layer
Measuring the current altitude value by the device;
Confirming the previously stored floor level altitude distribution information corresponding to the building; And
Calculating a user location layer by confirming previously stored floor level altitude distribution information corresponding to the current altitude value;
And estimating a position in the building. A computer-readable recording medium having recorded thereon a program for executing a method for estimating a position in a building according to any one of claims 1 to 6. A reference point setting module for setting a reference point for position estimation when it is determined that the user has entered the building;
An interlayer information setting module for setting interlayer information; And
A user location layer calculation module for confirming a current altitude value and estimating a user location layer using the ascertained altitude value, the altitude value set as the reference point, and the interlayer information;
The method comprising the steps of: determining a location of a building; 9. The method of claim 8,
A sensor information collection module for collecting sensor information for determining whether to enter into the building and for collecting information about an altitude value;
The method further comprising the step of: 9. The method of claim 8,
The interlayer information setting module
Wherein the interlayer information is set by using the inter-layer mean height information set corresponding to the building or by using past accumulated floor height distribution information corresponding to the building. 9. The method of claim 8,
The user location layer calculation module
Calculating a height obtained by checking the current altitude value, subtracting an elevation value of the reference point from the ascertained altitude value, and estimating a user location layer using the calculated height and the set interlayer information. The method comprising: If it is determined that the user has entered the building, a reference point for position estimation is set, inter-layer information is set, the current altitude value is confirmed, and the altitude value set by the reference point and the inter- A terminal estimating a location layer; And
A service device that receives information on a user location layer from the terminal and provides a location information service corresponding to the layer to the terminal;
The method comprising the steps < RTI ID = 0.0 > of: < / RTI >

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