KR101596320B1 - Method for location calculating with electronic shelf label signal, recording medium, terminal and system for performing the method - Google Patents

Abstract

A positioning method using an electronic shelf label (ESL) signal includes: a step of receiving the ESL signal collected from an ESL tag of products displayed in a store in a converted type; a step of requesting position information of the ESL corresponding to the converted ESL signal to an ESL server; a step of receiving the position information of the ESL from the ESL server; and positioning a terminal, using the ESL signal and the position information of the ESL. Therefore, the positioning method of the present invention can provide a position information with higher accuracy using the ESL as a positioning medium, and thus can provide a position based service efficiently.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a positioning method using an ESL signal, a recording medium, a terminal, and a system for performing the same,

The present invention relates to a positioning method using an ESL signal, a recording medium, a terminal and a system for performing the same, and more particularly, to a positioning method using an ESL signal in a room where ESL is installed, a recording medium, ≪ / RTI >

The ESL (Electronic Shelf Label) system uses ESL tags to guide price information of goods by linking with POS (point-of-sale) devices, and displays price per unit, sale price, normal price, It is a system that displays various promotion information such as information and display quantity to help purchase goods and store operation.

Generally, an ESL system is configured to allocate a time slot to a plurality of ESL tags, and to perform a wireless communication with the ESL server by waking up only during the assigned time slot. The number of ESL tags included in the ESL system increases rapidly according to the size of the store to which the ESL tag is applied. In this case, the ESL tag relays between the ESL server and the ESL tag through a coordinator or a router.

In the ESL tag (electronic label) provided in the ESL system as described above, the price information is continuously updated periodically or non-periodically. The updated method receives data from the gateway connected to the ESL tag (electronic label) and displays the data on the display.

On the other hand, as a positioning technique for accurately grasping the position of a user, there are GPS (Satellite Navigation Device) and WPS (WiFi Positioning System) in the prior art. These technologies use satellite and WiFi signal information to determine the position. However, these technologies have a high cost of installing positioning media for positioning and a delay in calculation time.

In addition, location information provided by using a mobile phone incorporating a GPS (Global Positioning System) and a WIF (WiFi Positioning System) only grasps the location of the user in the base station of the user, There is a limit in not being able to grasp the exact position.

KR 10-0511555 B1 KR 10-2009-0120133 A KR 10-2008-0054537 A

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a positioning method for providing an accurate position using an ESL signal as a positioning medium.

It is another object of the present invention to provide a recording medium on which a computer program for performing a positioning method using the ESL signal is recorded.

It is still another object of the present invention to provide a terminal for performing a positioning method using the ESL signal.

Still another object of the present invention is to provide a system for performing the positioning method using the ESL signal.

According to another aspect of the present invention, there is provided a positioning method using an ESL signal, the method comprising: receiving an ESL signal collected from an ESL (Electronic Shelf Label) tag of products displayed in a store in a transformed form; Requesting an ESL server of location information of an ESL corresponding to the converted ESL signal; Receiving location information of the ESL from the ESL server; And positioning the terminal using the ESL signal and the location information of the ESL as positioning data.

In an embodiment of the present invention, the ESL signal may include information on an ID of an ESL and RSSI (signal strength).

In the embodiment of the present invention, the step of receiving the ESL signal in the converted form may receive the ESL signal according to the Zigbee protocol in a converted form according to the Bluetooth protocol.

In an embodiment of the present invention, the step of positioning the terminal may utilize at least one of Friis formula, Cramer formula and triangulation method.

In the embodiment of the present invention, the step of positioning the terminal may use the ESL signal having the highest RSSI among the collected ESL signals as positioning data.

In an embodiment of the present invention, the positioning method using the ESL signal may further comprise the step of displaying the position of the positioned terminal.

According to an embodiment of the present invention, a computer program for performing a positioning method using an ESL signal is recorded in a computer-readable storage medium.

According to an embodiment of the present invention, an STA terminal using an ESL signal communicates with a signal conversion module in a store, and transmits an ESL signal collected from an ESL (Electronic Shelf Label) A communication unit for receiving the converted data; An information request unit for requesting location information of an ESL corresponding to the converted ESL signal to the ESL server; An information collecting unit for receiving location information of the ESL from the ESL server; And a positioning unit for positioning the current position using the ESL signal and the positional information of the ESL as positioning data.

In the embodiment of the present invention, the communication unit may receive the ESL signal according to the Zigbee protocol in the converted form according to the Bluetooth protocol by the signal conversion module.

In an embodiment of the invention, the signal conversion module may be attached to a cart or cart located in the store.

In an embodiment of the present invention, the ESL signal may include information on an ID of an ESL and RSSI (signal strength).

In an embodiment of the present invention, the positioning unit can perform positioning using an application installed inside the terminal.

In an embodiment of the present invention, the positioning unit may use at least one of a Friis formula, a Cramer formula, and a triangulation method.

In an embodiment of the present invention, the positioning unit may use the ESL signal having the highest RSSI among the collected ESL signals as positioning data.

In an embodiment of the present invention, the positioning terminal using the ESL signal may further include a display unit for displaying the position of the positioned terminal.

According to another embodiment of the present invention, a positioning system using an ESL signal receives an ESL signal from an ESL (Electronic Shelf Label) tag of products displayed in a store, A signal conversion module for converting a protocol; An ESL server for storing and managing location information on the ESL tag in a database; And an ESL server for receiving the converted ESL signal from the signal conversion module, requesting the ESL server for location information of the ESL corresponding to the converted ESL signal, And a terminal for positioning its own position using data.

In an embodiment of the present invention, the signal conversion module includes: a first communication unit for receiving an ESL signal according to a first communication protocol from the ESL tag; A converter for converting an ESL signal according to the first communication protocol into an ESL signal according to a second communication protocol; And a second communication unit for transmitting the converted ESL signal to the terminal according to the second communication protocol.

In an embodiment of the present invention, the first communication protocol may be a Zigbee protocol and the second communication protocol may be a Bluetooth protocol.

In an embodiment of the present invention, the signal conversion module may be attached to a cart or cart located in the store.

In an embodiment of the present invention, the terminal can locate its position using an application installed therein.

According to the positioning method using the ESL signal, the recording medium, the terminal and the system for performing the same, the ESL (Electronic Shelf Label) is used as the positioning medium instead of the conventional positioning medium to provide a position with high accuracy, Based service can be efficiently provided. In addition, since the ESL signal is used without installing a separate positioning medium in a large-sized shopping mall in which ESL is installed, additional cost is not required for providing additional equipment. Furthermore, promotional effects and advertising effects within a large market or a department store can be achieved.

1 is a block diagram of a positioning system using an ESL signal in accordance with an embodiment of the present invention.
2 is a detailed block diagram of the terminal of FIG.
3 is a detailed block diagram of the signal conversion module of FIG.
4 is a conceptual diagram of a smart cart to which the signal conversion module of FIG. 1 is attached.
FIG. 5 is a conceptual diagram of a smart shopping cart to which the signal conversion module of FIG. 1 is attached.
6 is a flowchart illustrating a positioning method using an ESL signal in the entire positioning system according to an embodiment of the present invention.
7 is a flowchart of a positioning method using an ESL signal in a terminal according to an embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 is a block diagram of a positioning system using an ESL signal in accordance with an embodiment of the present invention. 2 is a detailed block diagram of the terminal of FIG. 3 is a detailed block diagram of the signal conversion module of FIG.

The positioning system 1 (hereinafter, referred to as "system") that uses an ESL (Electronic Shelf Label) signal according to the present invention proposes an ESL as a new positioning medium that can replace GPS, And provides a high-accuracy location based service (LBS) based on the secured location information.

The ESL is an electronic price indicator, which is a device in which a paper price tag indicating shop display product information is changed to an electronic price tag. It is possible to implement smart shopping environment by replacing paper price list attached to department store, large mart, convenience store, duty free shop, etc. based on object communication such as Zigbee by display price list which can change real time price. This is a technology that utilizes low-power wireless communication technology and electronic paper display technology. Distributors do not have to change the labels installed in the stores, and consumers can get various product information.

Referring to FIG. 1, a system 1 according to the present invention includes a signal conversion module 10, an ELS tag 30, an ELS server 40, and a user's terminal 50. The system 1 may be formed in the same store such as a large-sized mall, a department store, and the like.

The ELS tag 30 exists for each commodity such as a large-sized mart, a department store, etc., and can be attached to a sales desk, a shelf, or directly attached to a commodity or a commodity package. The ELS tag 30 includes commodity information such as a commodity ID, a signal intensity (RSSI), a position of a commodity, a commodity event, a commodity price, and a sale, and communicates with the ELS server 40 So that the product information can be updated.

The terminal 50 of the user may have mobility and may be a mobile terminal such as a user equipment (UE), a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS) device, a personal digital assistant (PDA), a wireless modem, a handheld device, and the like.

The terminal 50 is a device for supporting wireless communication and may be a smart phone, a mobile phone, a tablet computer, a notebook computer, a netbook, a PDA, a PMP, a PSP, an MP3 player, an e-book reader, a navigation device, a smart camera, an electronic dictionary, an electronic clock, a game machine, and the like.

The terminal 50 can execute various application programs based on an operating system (OS). The operating system is a system program for allowing an application program to use hardware of a terminal, and may include a mobile computer operating system such as an Android OS, an iOS, a Windows mobile OS, a sea OS, a Symbian OS, and a BlackBerry OS.

The application program is a program developed to perform a specific task using a terminal and includes various multimedia contents such as a game, a moving picture, and a picture as well as various applications and service objects, an image viewer for executing the multimedia contents, And an execution program such as a video player.

The terminal 50 may display an application program or provide a UI to a user through the display unit (not shown). The display unit may include a liquid crystal display (LCD) panel, a plasma display panel (PDP), an organic light-emitting diode (OLED) display panel, and the like.

In addition, a touch screen function may be included in the display unit or may be provided as a separate touch pad device for processing user input. Alternatively, the terminal 50 may include an input unit (not shown) such as a keypad formed separately from the display unit and receiving a user's input.

The terminal 50 receives the converted ESL signal from the signal conversion module 10 and locates its own position using the ESL signal. 2, the terminal 50 includes a communication unit 510, an information request unit 530, an information collection unit 550, and a positioning unit 570.

The terminal 50 of the present invention may be installed and executed by an application (application program) for positioning its own position using the ESL signal. The configuration of the communication unit 510 and the like may be implemented by the terminal 50 And may be controlled by an application for positioning its position using the ESL signal.

The communication unit 510 communicates with the signal conversion module 10 in the store and receives the ESL signals collected from the ESL tags of the displayed products in a converted form. The received ELS signal includes information on the ID of the ESL and the RSSI (signal strength).

For example, the original ESL signal conforms to a Zigbee communication scheme, and can be converted into an ESL signal according to a Bluetooth communication scheme by the signal conversion module 10.

The information requesting unit 530 requests the ESL server 40 for location information of the ESL corresponding to the converted ESL signal. For example, the information requesting unit 530 may request location information corresponding to the ID of the ESL having the highest RSSI among the collected ESL signals.

The ESL server 40 is a server for storing and managing location information on the ESL tag 30 in a database, and may have a database for storing location information of each ESL. The ESL server 40 receiving the location information request from the information requesting unit 530 extracts the location information from the database and returns the location information of the ESL.

The information collecting unit 550 receives and collects the location information of the ESL from the ESL server 40 and provides the location information to the positioning unit 570 as positioning data.

The positioning unit 570 uses the ID of the ESL and the position information of the RSSI and the ESL as the positioning data to position the current position of the terminal 50. The positioning unit 570 can estimate the position of the terminal 50 using an application (application program) interlocked with the present invention.

In addition, the position can be estimated using at least one of Friis formula, Cramer formula, and triangulation method. For example, the application calculates a Fourier's equation that converts the signal intensity according to the location of the ESL into a distance from the user terminal, calculates a polyhedral quadratic equation using a Cramer formula, The location of the terminal 50 can be found.

In this process, if the signal characteristics of the ESL do not exactly match the Friis formula, multiply by a constant coefficient to determine the distance according to the signal strength of the ESL. In addition, since there are many ESLs, signal interference may occur. Such signal interference causes noise in the signal strength of the ESL to weaken the signal strength. To exclude these values as much as possible, the ESL used for positioning can be positioned using signals of any ESL having the strongest signal strength.

The terminal 50 may display its position on a map or the like using the display unit. Accordingly, the position of the terminal 50 becomes the position of the user, and the user can intuitively grasp the position of the user through the visually expressed information.

The signal conversion module 10 collects in-store information and communicates with the user's terminal 50 as a module used for ESL positioning. To this end, the signal conversion module 10 receives the ESL signal from the ESL tag 30 of the products displayed in the store, converts the ESL signal, and transmits the ESL signal to the user terminal 50.

Referring to FIG. 3, the signal conversion module 10 includes a first communication unit 111, a conversion unit 113, and a second communication unit 115. The first communication unit 111 and the second communication unit 115 use different communication methods.

Specifically, the first communication unit 111 receives an ESL signal according to the first communication protocol from the ESL tag 30 of the products displayed in the store. The first communication protocol may be a Zigbee protocol. The first communication unit 111 may periodically receive the ESL signal from the ESL tag 30 or receive the ESL signal whenever an update occurs.

The converting unit 113 converts an ESL signal according to the first communication protocol into an ESL signal according to a second communication protocol. This converts the signal into a signal that can be transmitted to the terminal 50.

The second communication unit 115 transfers the converted ESL signal to the terminal 50 according to the second communication protocol. The second communication protocol may be a Bluetooth protocol.

The terminal 50 receives the ESL signal according to the second communication protocol and estimates its own position using an application (application program) interlocked with the present invention. For example, the terminal 50 may estimate the position of the signal conversion module 10 using the ESL signal, and may regard the position of the signal conversion module 10 as its own position.

Zigbee communication is used between the signal conversion module 10 and the ESL tag 30 of the goods and the signal conversion module 10 and the user terminal 50 Bluetooth communication can be used. However, the communication method is not limited to this, and may include both the wireless communication method currently used or the wireless communication method used in the future.

Accordingly, the signal can be converted by using the signal conversion module 10 used for the LBS using the ESL in a large-scale shopping mall, and the signal can be applied to the terminal 50 and used as positioning data. Therefore, accurate location tracking is possible even in a limited indoor space such as a shopping mall, and a high-quality location-based service can be provided to customers.

Referring to FIG. 4, there is shown a smart cart 11 having the signal conversion module 10 mounted on a cart according to the present invention. Referring to FIG. 5, the signal conversion module 10 according to the present invention is inserted into a shopping cart The attached smart cart 12 is presented.

The smart cart 11 or the smart shopping cart 12 can be used to grasp the location of the user so that the user can efficiently utilize the LBS, induce sales of products in the store, have.

6 is a flowchart illustrating a positioning method using an ESL signal in the entire positioning system according to an embodiment of the present invention. 7 is a flowchart of a positioning method using an ESL signal in a terminal according to an embodiment of the present invention.

The positioning method using the ESL signal according to the present embodiment can be carried out in substantially the same configuration as the system 1 and the terminal 50 in Figs. 1 and 2. Therefore, the same components as those of the system 1 and the terminal 50 in FIGS. 1 and 2 are denoted by the same reference numerals, and repeated descriptions are omitted. Further, the positioning method using the ESL signal according to the present embodiment can be executed by an application (application program) for positioning using the ESL signal.

Referring to FIG. 6, in the positioning method using the ESL signal according to the present embodiment, the signal conversion module 10 in the store first receives the ESL signal from the ELS tag 30 (step S31).

The signal conversion module 10 converts the ESL signal for use by the user's terminal 50 (step S11). For example, a Zigbee type ESL signal is converted into a Bluetooth type, and the converted ESL signal is transmitted to the terminal 50 (step S13).

The terminal 50 requests the ESL server 40 for the location information of the ESL corresponding to the ESL signal using information on the ID of the ESL and the RSSI (signal strength) (step S51). For example, the terminal 50 may request location information corresponding to the ID of the ESL having the highest RSSI among the collected ESL signals.

The ESL server 40 having received the location information request from the terminal 50 extracts information from the database 60 storing the location information of each ESL in step S41, Upon returning the location information (step S61), it transmits it to the terminal 50.

The terminal 50 uses the ID of the ESL and the location information of the RSSI and the ESL as positioning data to locate the current position of the terminal 50. The terminal 50 can estimate its position using an application program (application) linked with the present invention (step S53). In addition, the terminal 50 may display its position on a map or the like to help the user intuitively recognize the position (step S55).

Referring to FIG. 7, a positioning method using an ESL signal in a terminal 50 according to the present embodiment receives an ESL signal collected from an ESL (Electronic Shelf Label) tag of products displayed in a store in a converted form Step S510).

The received ELS signal includes information on the ID of the ESL and the RSSI (signal strength). For example, the original ESL signal conforms to a Zigbee communication scheme, and the signal conversion module 10 can receive an ESL signal conforming to a Bluetooth communication scheme.

After receiving the converted ESL signal, the ESL server requests the ESL server to provide the location information of the ESL corresponding to the ESL signal (step S530). For example, the location information corresponding to the ID of the ESL having the highest RSSI among the collected ESL signals may be requested.

Upon receiving the location information of the ESL from the ESL server (step S550), the location of the terminal 50 is determined using the location information of the ESL signal and the ESL as location data (step S570).

An application program (application) installed in the terminal 50 can be used for the position measurement, and the position can be estimated using at least one of Friis formula, Cramer formula, and triangulation method. For example, the application calculates a Fourier's equation that converts the signal intensity according to the location of the ESL into a distance from the user terminal, calculates a polyhedral quadratic equation using a Cramer formula, The location of the terminal 50 can be found.

In this process, if the signal characteristics of the ESL do not exactly match the Friis formula, multiply by a constant coefficient to determine the distance according to the signal strength of the ESL. In addition, since there are many ESLs, signal interference may occur. Such signal interference causes noise in the signal strength of the ESL to weaken the signal strength. To exclude these values as much as possible, the ESL used for positioning can be positioned using signals of any ESL having the strongest signal strength.

In addition, the position of the positioned terminal 50 can be displayed on a map or the like (step S590). Accordingly, the position of the terminal 50 becomes the position of the user, and the user can intuitively grasp the position of the user through the visually expressed information.

Such a positioning method using an ESL signal can be implemented in an application or can be implemented in the form of program instructions that can be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination.

The program instructions recorded on the computer-readable recording medium may be ones that are specially designed and configured for the present invention and are known and available to those skilled in the art of computer software.

Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.

Examples of program instructions include machine language code such as those generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules for performing the processing according to the present invention, and vice versa.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. You will understand.

The present invention is highly likely to be utilized in a location-based service field because it provides a positioning technique with high accuracy by using an ESL signal secured in a store as a positioning medium. Also, by providing LBS at large discount stores, it is possible to sell the LBS system for each store, and synergy with ESL can promote sales of ESL. Furthermore, it can be commercialized because it can generate promotional effect and advertisement effect in a large market or a department store, and it can be widely used for development of application technology of location-based service and positioning technology.

1: Positioning system 10: Signal conversion module
111: first communication unit 113:
115: second communication unit 30: ELS tag
40: ELS server 50: terminal
510: communication unit 530: information request unit
550: information collection unit 570: positioning unit
60: Database 11: Smart Cart
12: Smart shopping cart

Claims (20)

The communication unit converts the ESL signal including the ID of the corresponding ESL tag and information on the RSSI (signal strength) from the ESL (Electronic Shelf Label) tag of the products displayed on the store through the signal conversion module for converting the communication protocol into the converted form ;
Requesting an ESL server for location information of an ESL corresponding to the converted ESL signal;
The information collection unit receiving location information of the ESL from the ESL server; And
The positioning unit applies a predetermined coefficient to the ESL signal so that the RSSI of the ESL signal according to the position of the ESL tag can be converted into a distance to the terminal, and uses the ESL signal and the position information of the ESL as positioning data, And positioning the position of the terminal.
delete The method of claim 1, wherein the step of receiving the ESL signal in a converted form comprises:
A positioning method using an ESL signal that receives an ESL signal according to a Zigbee protocol in a converted form according to a Bluetooth protocol.
The method as claimed in claim 1, wherein the positioning unit locates the position of the terminal,
Using an ESL signal, using at least one of a Friis formula, a Cramer formula, and a triangulation method.
The method as claimed in claim 1, wherein the positioning unit locates the position of the terminal,
A method of positioning using an ESL signal, wherein the ESL signal having the highest RSSI among the collected ESL signals is used as positioning data.
The method according to claim 1,
And displaying the position of the terminal on which the display unit is located.
A computer-readable recording medium on which is recorded a computer program for performing a positioning method using an ESL signal according to any one of claims 1 to 6.
And receives the ESL signal including information on the ID of the corresponding ESL tag and the RSSI (signal intensity) collected from the ESL (Electronic Shelf Label) tag of the displayed products in a converted form by communicating with the signal conversion module in the store A communication unit;
An information request unit for requesting location information of an ESL corresponding to the converted ESL signal to the ESL server;
An information collecting unit for receiving location information of the ESL from the ESL server; And
A constant coefficient is applied to the ESL signal so that the RSSI of the ESL signal according to the position of the ESL tag can be converted into a distance to the current position and the position information of the ESL signal and the ESL is used as positioning data, A positioning terminal using an ESL signal, the positioning terminal including a positioning unit for positioning a position.
The communication device according to claim 8,
And an ESL signal for receiving an ESL signal according to a Zigbee protocol in a converted form according to a Bluetooth protocol by the signal conversion module.
10. The method of claim 9,
Wherein the signal conversion module uses an ESL signal attached to a cart or a shopping cart located in the store.
delete The apparatus according to claim 8,
And an ESL signal for positioning using an application installed in the terminal.
The apparatus according to claim 8,
A positioning terminal using an ESL signal, using at least one of a Friis formula, a Cramer formula, and a triangulation method.
The apparatus according to claim 8,
And an ESL signal using the ESL signal having the highest RSSI as the positioning data among the collected ESL signals.
9. The method of claim 8,
And a display unit for displaying the position of the positioned terminal.
Receives an ESL signal including an ID of the ESL tag and information on an RSSI (signal strength) from an ESL (Electronic Shelf Label) tag of products displayed at a store, converts the communication protocol of the ESL signal, A signal conversion module attached to a cart or a shopping cart positioned in the shopping cart;
An ESL server for storing and managing location information on the ESL tag in a database; And
An ESL server for receiving the converted ESL signal from the signal conversion module and requesting the ESL server for location information of the ESL corresponding to the converted ESL signal, And a terminal for applying a constant coefficient to the ESL signal so as to convert the ESL signal into a distance from the ESL signal and positioning the position of the ESL signal using the ESL signal and the position information of the ESL as positioning data. Positioning system.
17. The apparatus of claim 16, wherein the signal conversion module comprises:
A first communication unit for receiving an ESL signal according to a first communication protocol from the ESL tag;
A conversion unit for converting an ESL signal according to the first communication protocol into an ESL signal according to a second communication protocol which is a communication protocol capable of delivering the ESL signal to the terminal; And
And a second communication unit for communicating the converted ESL signal to the terminal according to the second communication protocol.
18. The method of claim 17,
Wherein the first communication protocol is a Zigbee protocol and the second communication protocol is a Bluetooth protocol.
delete 17. The method of claim 16,
Wherein the terminal uses an ESL signal for positioning its own position using an application installed therein.

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