KR102356998B1 - Multi-mode wireless access point and control method thereof - Google Patents

Abstract

An embodiment of the present invention relates to a multi-mode wireless sharing device and a control method thereof which additionally combine a visible light communication (VLC) module (or called light fidelity (LiFi) communication module) as a lighting communication system, which is a communication technology using light in a Wi-Fi type wireless sharing device to selectively enable a Wi-Fi wireless communication mode and a visible light communication mode to be used according to specific conditions. A multi-mode wireless sharing device according to one aspect of the present invention, may comprise: a Wi-Fi communication unit for communicating in a Wi-Fi communication method; a VLC communication unit for communicating in a VLC communication method; and a control unit for controlling one of the Wi-Fi communication mode for activating and operating the Wi-Fi communicating unit and the VLC communication mode for activating and operating the VLS communication unit to be selectively activated according to whether at least one item of ambient illuminance, whether LED light is on/off, corresponding Wi-Fi signal strength, and corresponding Wi-Fi effective speed satisfies specific conditions preset for each item.

Description

Multi-mode wireless sharing device and its control method

The present invention relates to a wireless sharing device (WIRELESS ACCESS POINT), and more particularly, a Visible Light Communication (VLC) module (or LiFi (Light It relates to a multi-mode wireless sharing device and a control method thereof, which additionally combine Fidelity (referred to as a communication module) to selectively use a Wi-Fi wireless communication mode and a visible light communication mode according to specific conditions.

In general, WiFi wireless sharing devices use 2.4GHz and 5GHz frequency bands, and have the advantage of an unlicensed band that anyone can use without being subject to government frequency regulation. The speed is slow, and it is very difficult to maintain communication quality because RF radio frequency-based communication such as WiFi, Zigbee, UWB, and RFID is prone to frequency diffraction and reflection.

That is, since the RF frequency band-based communication method has limited available frequency resources, there is a limit to the use of limited frequency resources, and the WiFi-based wireless sharing device has a security issue.

On the other hand, Li-Fi (Light Fidelity) is a communication technology using visible light, and refers to a technology for connecting to a network by transmitting data using an LED. Li-Fi is a concept first proposed in 1998 by Professor Nakamura of Keio University in Japan.

Li-Fi is a concept in which an electronic chip is attached to an LED light to transmit digital data in visible light, and a device equipped with a light sensor responds to this digital signal. The technology applying the concept of Li-Fi was first proposed by Professor Harold Haas' team in the Department of Physical Engineering, University of Edinburgh, UK in 2011. This technology is inspired by the fact that light is also part of the electromagnetic spectrum, and the light bulb acts as a kind of repeater. Li-Fi is equipped with a module called D-Light in the light bulb, so that the D-Light module can store and transmit data by changing the frequency of the light emitted by the light bulb. Because Li-Fi uses visible light emitted by LED bulbs rather than electromagnetic waves, it is not harmful to the human body.

In addition, Li-Fi has the advantage that, since visible light is available as a common frequency all over the world, the installation of a new network and communication equipment is hardly required for communication, so the construction cost of additional facilities is hardly required. It is attracting attention as a next-generation short-distance communication technology that can solve the problem of radio frequency exhaustion due to increased traffic.

Therefore, the need for a multi-mode wireless sharing device that allows the Wi-Fi wireless communication mode and the visible light communication mode to be selectively used according to specific conditions by grafting the Li-Fi visible light communication technology to the widely used WiFi-type wireless sharing device is emerging. have.

Laid-Open Patent Publication No. 10-2016-0063518 (2016.06.07.)

The present invention is to solve the conventional problems described above, the purpose of which is a Visible Light Communication (VLC) module (or LiFi (Light Fidelity)) as a lighting communication system, which is a communication technology using light in a WiFi-type wireless sharing device It is to provide a multi-mode wireless sharing device and a method for controlling the same by additionally combining the communication module) to selectively use the Wi-Fi wireless communication mode and the visible light communication mode according to specific conditions.

In order to achieve the above object, a multi-mode wireless sharing device according to an aspect of the present invention includes a WiFi communication unit for communicating in a WiFi communication method; a VLC communication unit for communicating in a Visible Light Communication (VLC) communication method; And by activating the WiFi communication unit according to whether at least one item of ambient illuminance, whether the LED light is on/off, the corresponding WiFi signal strength, and the WiFi effective speed satisfies a specific condition preset for each item A control unit for controlling one of a WiFi communication mode to operate and a VLC communication mode for operating by activating the VLC communication unit to be selectively activated; may include a rule.

The control unit may turn off the WiFi communication mode and turn on the VLC communication mode when the ambient illuminance is less than or equal to a preset reference illuminance value is satisfied, and the reference illuminance value may be set in the range of 25Lux to 35Lux.

The control unit may turn off the WiFi communication mode and turn on the VLC communication mode when the LED light is on.

The controller may turn off the WiFi communication mode and turn on the VLC communication mode when the WiFi signal strength satisfies the condition that the WiFi signal strength is less than or equal to a preset reference strength value, and the reference strength value may be set in the range of -60dBm to -85dBm .

The control unit may turn off the WiFi communication mode and turn on the VLC communication mode when the effective WiFi speed decreases by more than a preset reference ratio compared to the normal speed based on the downlink speed, and the reference ratio is in the range of 45% to 55% can be set.

The control unit turns off the WiFi communication mode and turns on the VLC communication mode when the surrounding illuminance satisfies the night condition in which the ambient illuminance is less than or equal to the preset reference illuminance value and the WiFi effective speed decreases by more than a preset ratio compared to the normal speed based on the downlink speed and the reference illuminance value may be set in the range of 25Lux to 35Lux, and the reference ratio may be set in the range of 45% to 55%.

In order to achieve the above object, a control method of a multi-mode wireless sharing device according to another aspect of the present invention includes the steps of: (a) communicating in a WiFi communication method through a WiFi communication unit; (b) communicating in the VLC communication method through the VLC communication unit; And (c) the step ( It may include; controlling one of the WiFi communication mode to activate and operate the WiFi communication unit in a) and the VLC communication mode to activate and operate the VLC communication unit in step (b) to be selectively activated.

The step (c) may turn off the WiFi communication mode and turn on the VLC communication mode when the surrounding illuminance is less than or equal to a preset reference illuminance value is satisfied, and the reference illuminance value may be set in the range of 25Lux to 35Lux. have.

The step (c) may turn off the WiFi communication mode and turn on the VLC communication mode when the LED light is on.

The step (c) may turn off the WiFi communication mode and turn on the VLC communication mode when the condition that the WiFi signal strength is less than or equal to a preset reference strength value is satisfied, and the reference strength value is set in the range of -60dBm to -85dBm can be

The step (c) may turn off the WiFi communication mode and turn on the VLC communication mode when the WiFi effective speed decreases by more than a preset reference ratio compared to the normal speed based on the downlink speed, and the reference ratio is 45% to 55% It can be set in the range of

The step (c) turns off the WiFi communication mode and turns off the WiFi communication mode when the ambient illuminance is less than or equal to the preset reference illuminance value at night, and when the effective WiFi speed decreases by more than a preset ratio compared to the normal speed based on the downlink speed may be turned on, and the reference illuminance value may be set in the range of 25Lux to 35Lux, and the reference ratio may be set in the range of 45% to 55%.

According to another aspect of the present invention to achieve the above object, it is possible to provide a computer-readable recording medium in which a program for executing the control method of the multi-mode wireless sharing device is recorded in a computer.

According to another aspect of the present invention in order to achieve the above object, it is possible to provide an application stored in a computer-readable recording medium to execute the control method of the multi-mode wireless sharing device in combination with hardware.

According to another aspect of the present invention to achieve the above object, it is possible to provide a computer program stored in a computer-readable recording medium to execute the control method of the multi-mode wireless sharing device in a computer.

As described above, according to various aspects of the present invention, a Visible Light Communication (VLC) module (or LiFi (Light Fidelity) communication module as a lighting communication system, which is a communication technology that uses light in a WiFi-type wireless sharing device. ) by additionally combining the Wi-Fi wireless communication mode and the visible light communication mode to selectively use the Wi-Fi wireless communication mode and the visible light communication mode according to specific conditions. It has the effect of taking all of them.

1) In a WiFi-type wireless sharing device, the more nearby WiFi users or the higher the frequency of use, the slower the perceived effective speed. (For example, b/a/b/n/ac mode) Set the minimum download speed standard for VLC operation, measure the minimum effective download speed for each WiFi mode for each operating frequency band, and if it is less than the set value, VLC operation is disabled. can be activated.

2) In radio frequency-based communication, it is very difficult to maintain communication quality because it is prone to frequency diffraction and reflection. However, since visible light communication is known to have no risk of crosstalk with wireless communication using RF frequencies, it is advantageous for frequency diffraction, interference, and noise problems.

3) Frequency resource limitation: Visible light area refers to the area between infrared and ultraviolet light that can be seen by the human eye, and visible light communication refers to communication technology using this area. If the wavelength of visible light is converted to a frequency, it corresponds to approximately 385 THz to 789 THz. Therefore, a frequency bandwidth capable of compensating for the existing frequency band shortage can be utilized as a 400 THz bandwidth.

4) WiFi-type wireless routers have security issues, but in the proposed method, data transmission is possible only where visible light is exposed. In addition, when using a light emitting diode for lighting, there is an advantage of excellent security in that a service limited to a local area is possible.

5) Since traffic concentrated on the existing WiFi-type wireless router can be accessed in VLC communication mode, there is a traffic distribution effect.

6) Visible light communication is communication with almost no external noise and can be highlighted as an alternative to the existing wireless communication-based location tracking/recognition technology, which has very weak security. You can judge for yourself. In addition, it has the potential of new entertainment as you can feel the joy of visible light while communicating.

7) In addition, since the traffic concentrated on the existing WiFi-type wireless router is connected in the VLC communication mode, there is a traffic distribution effect, and communication is difficult when the light is blocked. There is an advantage in that it is possible to improve security by preventing outgoing signals.

8) Conventional radio frequency communication is limited in use in hospitals, aircraft, and nuclear power plants due to electromagnetic interference, whereas LiFi does not have such restrictions.

1 is a block diagram of a communication system to which a multi-mode wireless sharing device according to an exemplary embodiment of the present invention is applied;
2 is a block diagram of a multi-mode wireless sharing device according to an exemplary embodiment of the present invention;
3 to 6 are flowcharts of a method for controlling a multi-mode wireless sharing apparatus according to an exemplary embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, the same components are to have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, when it is determined that a detailed description of a known configuration or function related to the embodiment of the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a communication system to which a multi-mode wireless sharing device according to an exemplary embodiment of the present invention is applied, and as shown in the figure, a communication network 1, a multi-mode wireless router 2, and a user terminal (3) may be included.

The communication network 1 may be any single or complex network that allows the user terminal 3 to communicate with other devices such as a server device through the multi-mode wireless router 2 by wire, wireless and/or the Internet, etc. free

The multi-mode wireless router (2) is a wireless sharing device (AP: Access Point) of a radio frequency system including WiFi, a communication technology that uses light as a lighting communication system LiFi (Light Fidelity) including Visible Light Communication (Visible Light Communication); As an AP device for multi-mode operation by additionally combining VLC) modules, for example, one of a WiFi communication mode that activates WiFi communication to operate and a VLC communication mode that activates VLC communication and operates according to a specific condition By selectively driving the vehicle, it is possible to connect the user terminal 2 with the wireless communication method such as WiFi or LiFi to connect the user terminal 2 to the communication network 1 .

The user terminal 3 is a terminal device that can be used by connecting to the communication network 1 through the multi-mode wireless router 2, for example, a mobile communication terminal and PDA capable of voice communication, data communication, and Internet communication. , a smart phone, a tablet PC, a notebook PC, a personal computer (PC), and the like.

2 is a block diagram of a multi-mode wireless sharing device 20 according to an exemplary embodiment of the present invention.

Referring to FIG. 2 , the multi-mode wireless sharing device 20 may be configured to be included in the multi-mode wireless router 2 of FIG. 1 , and a WiFi communication unit 21 , a VLC communication unit 23 , and a control unit 25 . may include

The WiFi communication unit 21 is for communicating with other devices according to the WiFi communication method, and has the advantage of an unlicensed band that anyone can use at will without being regulated by the government by using the 2.4 GHz and 5 GHz frequency bands.

In this embodiment, the WiFi communication unit 21 is described as an example, but the present invention is not limited thereto. Instead of the WiFi communication unit 21 , an RF radio frequency-based communication module such as Zigbee, UWB, or RFID may be substituted and used.

The VLC communication unit 23 is for communicating with other devices according to a Visible Light Communication (VLC) method, and may use, for example, a Light Fidelity (LiFi) communication method.

The control unit 25 specifies one or more items related to visible light communication quality and one or more items related to WiFi communication quality, sets a specific condition for each specified item, and according to whether the specific condition set for the specific item is satisfied It can be driven by selectively activating the WiFi communication unit 21 or the VLC communication unit 23 .

For example, the control unit 25 determines whether at least one item of ambient illuminance, whether the LED light is on/off, the corresponding WiFi signal strength, and the corresponding WiFi effective speed satisfies a specific condition preset for each item. Accordingly, one of a WiFi communication mode for activating and operating the WiFi communication unit 21 and a VLC communication mode for activating and operating the VLC communication unit 23 may be controlled to be selectively activated.

As an example, when the control unit 25 satisfies the condition that the ambient illuminance (brightness) as an item related to visible light communication quality is less than or equal to a preset reference illuminance value (since such illuminance condition is advantageous for VLC communication) of the WiFi communication unit 21 By turning off the WiFi communication mode and turning on the VLC communication mode of the VLC communication unit 23, it is possible to control the multi-mode wireless sharing device 20 to be activated and operated in the VLC communication mode.

A reference illuminance value as a specific condition of items related to visible light communication quality may be set in the range of 25Lux to 35Lux, and in an embodiment of the present invention, the reference illuminance value may be set to 30Lux.

As another example, the controller 25 turns off the WiFi communication mode of the WiFi communication unit 21 when the LED lamp as an item related to visible light communication quality is turned on (since LiFi uses visible light emitted by the LED bulb, not electromagnetic waves) By turning on the VLC communication mode of the VLC communication unit 23, the multi-mode wireless sharing device 20 can be controlled to be activated and operated in the VLC communication mode.

The LED lights associated with the visible light communication quality may be one or more LED lights specified among the surrounding LED light(s).

As another example, the controller 25 turns off the WiFi communication mode of the WiFi communication unit 21 when it satisfies the condition that the WiFi signal (transmission and/or reception) strength as an item related to WiFi communication quality is less than or equal to a preset reference strength value. By turning on the VLC communication mode of the VLC communication unit 23, the multi-mode wireless sharing device 20 can be controlled to be activated and operated in the VLC communication mode.

The reference (transmission and/or reception) strength value as a specific condition of items related to WiFi communication quality may be set in the range of -60 dBm to -85 dBm, and in an embodiment of the present invention, the reference strength value may be set to -75 dBm have.

As another example, when the effective (transmission and/or reception) speed of WiFi as an item related to WiFi communication quality decreases by more than a preset reference ratio compared to the normal speed based on the downlink speed, the control unit 25 is the WiFi of the WiFi communication unit 21 By turning off the communication mode and turning on the VLC communication mode of the VLC communication unit 23, it is possible to control the multi-mode wireless sharing device 20 to be activated and operate in the VLC communication mode.

A reference ratio as a specific condition of items related to WiFi communication quality may be set in the range of 45% to 55%, and in an embodiment of the present invention, the reference ratio may be set to 50%.

As another example, the control unit 25 satisfies the condition that the ambient illuminance as an item related to the visible light communication quality is equal to or less than a preset reference illuminance value, and the effective WiFi speed as an item related to the WiFi communication quality is compared to the normal speed based on the downlink speed Multi-mode by turning off the WiFi communication mode of the WiFi communication unit 21 and turning on the VLC communication mode of the VLC communication unit 23 when decreasing more than a preset ratio (since this condition is advantageous for VLC communication and unfavorable to WiFi communication) The wireless sharing device 20 may be controlled to be activated and operated in the VLC communication mode.

The reference illuminance value as a specific condition of the item related to visible light communication quality may be set in the range of 25Lux to 35Lux, and the reference ratio as a specific condition of the item related to the WiFi communication quality may be set in the range of 45% to 55%, and , in an embodiment of the present invention, the reference illuminance value may be set to 30Lux and the reference ratio may be set to 50%.

3 to 6 are flowcharts of a method for controlling a multi-mode wireless sharing device according to an exemplary embodiment of the present invention. Since it is applied to the devices 2 and 20 of FIGS. 1-2, it will be described in parallel with the operation of the device. .

3 is a flowchart of a control method of the multi-mode wireless sharing device 2 according to an example of the present invention.

Starting, the control unit 25 of the multi-mode wireless sharing device 20 measures the ambient illuminance through the illuminance sensor (S301), and continuously monitors whether the measured illuminance value is below the preset reference illuminance value of 30Lux. do (S303).

As a result of the monitoring of step S303, when the surrounding illuminance is 30Lux or less, the WiFi communication mode of the WiFi communication unit 21 is turned off, and the VLC communication mode of the VLC communication unit 23 is turned on (eg LiFi On) to the multi-mode wireless sharing device 20 ) is activated and operated in the VLC communication mode (LiFi communication mode) (S305).

4 is a flowchart of a method for controlling a multi-mode wireless sharing device according to another example of the present invention.

Starting, the control unit 25 of the multi-mode wireless sharing device 20 continuously checks whether a specific LED light is on/off (S401), and as a result of the check in step S401, the specific LED light is turned on. When it is determined (S403), the WiFi communication mode of the WiFi communication unit 21 is turned off and the VLC communication mode of the VLC communication unit 23 is turned on (eg, LiFi On) so that the multi-mode wireless sharing device 20 is connected to the VLC communication mode (LiFi communication mode) to be activated and operated (S405).

5 is a flowchart of a method for controlling a multi-mode wireless sharing device according to another example of the present invention.

Starting, the controller 25 of the multi-mode wireless sharing device 20 measures the WiFi (transmission and/or reception) signal strength value of the WiFi communication unit 21 (S501), and the measured WiFi signal strength value is preset It is continuously monitored whether the reference intensity value is -75 dBm or less (S503).

As a result of monitoring in step S503, if the WiFi signal strength value measured in step S501 is -75 dBm or less, the WiFi communication mode of the WiFi communication unit 21 is turned off and the VLC communication mode of the VLC communication unit 23 is turned on (eg LiFi On) control so that the multi-mode wireless sharing device 20 is activated and operated in the VLC communication mode (LiFi communication mode) (S505).

6 is a flowchart of a control method of a multi-mode wireless sharing device according to another example of the present invention.

Starting, the controller 25 of the multi-mode wireless sharing device 20 measures the ambient illuminance through the illuminance sensor (S601), and continuously monitors whether the measured illuminance value is 30Lux or less, which is a preset reference illuminance value. (S603). As a result of monitoring in step S603, when the ambient illuminance value measured in step S601 is 30Lux or less, the WiFi effective (transmission and/or reception) speed of the WiFi communication unit 21 is measured (S605), and the measured It continuously monitors whether the WiFi effective speed falls below 50% of the set normal speed (S607).

As a result of monitoring in step S607, if the effective WiFi speed measured in step S605 falls below 50% of the set normal speed, the WiFi communication mode of the WiFi communication unit 21 is turned off and the VLC communication mode of the VLC communication unit 23 is turned on (one day). For example, by LiFi On), the multi-mode wireless sharing device 20 is activated and operated in the VLC communication mode (LiFi communication mode) (S609).

On the other hand, according to the control method of the multi-mode wireless sharing device according to the embodiment of the present invention described above, it is possible to implement a computer-readable recording medium in which a program for executing the method in a computer is recorded.

On the other hand, according to the control method of the multi-mode wireless sharing device according to the embodiment of the present invention described above, it is possible to implement an application stored in a computer-readable recording medium in order to execute the method in combination with hardware.

On the other hand, according to the method for controlling a multi-mode wireless sharing device according to an embodiment of the present invention described above, a computer program stored in a computer-readable recording medium can be implemented in order to execute the method in a computer.

For example, as described above, the method for controlling a multi-mode wireless sharing device according to an exemplary embodiment of the present invention is a computer-readable recording medium or such a recording medium including program instructions for performing various computer-implemented operations. It can be implemented as an application stored in . The computer-readable recording medium may include program instructions, local data files, local data structures, and the like alone or in combination. The recording medium may be specially designed and configured for the embodiment of the present invention, or may be known and used by a person skilled in the art of computer software. Examples of the computer-readable recording medium include hard disks, magnetic media such as floppy disks and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floppy disks, and ROMs, RAMs, flash memories, and the like. Hardware devices specially configured to store and execute such program instructions are included. Examples of program instructions may include high-level language codes that can be executed by a computer using an interpreter or the like as well as machine language codes such as those generated by a compiler.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: network
2: Multimode wireless router
3: User terminal
20: Multimode wireless sharing device
21: WiFi communication unit
23: VLC communication unit
25: control unit

Claims (23)

WiFi communication unit for communicating by WiFi communication method;
a VLC communication unit for communicating in a Visible Light Communication (VLC) communication method; and
Operation by activating the WiFi communication unit according to whether at least one item of ambient illuminance, LED light on/off, corresponding WiFi signal strength, and corresponding WiFi effective speed satisfies specific conditions set for each item A control unit for controlling to selectively activate one of a WiFi communication mode to activate the VLC communication mode and a VLC communication mode to operate by activating the VLC communication unit;
The control unit turns off the WiFi communication mode and turns on the VLC communication mode when the surrounding illuminance satisfies the night condition in which the ambient illuminance is less than or equal to the preset reference illuminance value and the WiFi effective speed decreases by more than the preset reference ratio compared to the normal speed based on the downlink speed Multi-mode wireless sharing device, characterized in that delete delete According to claim 1,
The controller turns off the WiFi communication mode and turns on the VLC communication mode when the LED light is on. According to claim 1,
Wherein the controller turns off the WiFi communication mode and turns on the VLC communication mode when the WiFi signal strength satisfies the condition that is less than or equal to a preset reference strength value. 6. The method of claim 5,
The reference strength value is a multi-mode wireless sharing device, characterized in that set in the range of -60dBm to -85dBm. delete delete The method of claim 1,
The reference illuminance value is a multi-mode wireless sharing device, characterized in that set in the range of 25Lux to 35Lux. According to claim 1,
The reference ratio is a multi-mode wireless sharing device, characterized in that set in the range of 45% to 55%. (a) a step for communicating in a WiFi communication method through a WiFi communication unit;
(b) communicating in the VLC communication method through the VLC communication unit; and
(c) the above step (a) according to whether at least one item of ambient illuminance, whether the LED light is on/off, the corresponding WiFi signal strength, and the corresponding WiFi effective speed satisfies a specific condition preset for each item (a) ) for controlling one of the WiFi communication mode to activate the WiFi communication unit to operate and the VLC communication mode to activate and operate the VLC communication unit in step (b) to be selectively activated;
In step (c), the WiFi communication mode is turned off and VLC communication is performed when the ambient illuminance is less than or equal to the preset reference illuminance value at night, and when the effective WiFi speed decreases by more than the preset reference ratio compared to the normal speed based on the downlink speed A method of controlling a multi-mode wireless sharing device, characterized in that the mode is turned on. delete delete 12. The method of claim 11,
The step (c) is a control method of a multi-mode wireless sharing device, characterized in that turning off the WiFi communication mode and turning on the VLC communication mode when the LED light is on. 12. The method of claim 11,
The step (c) is a control method of a multi-mode wireless sharing device, characterized in that the WiFi communication mode is turned off and the VLC communication mode is turned on when the condition that the WiFi signal strength is less than or equal to a preset reference strength value is satisfied. 16. The method of claim 15,
The reference intensity value is a control method of a multi-mode wireless sharing device, characterized in that set in the range of -60dBm to -85dBm. delete delete 12. The method of claim 11,
The reference illuminance value is a control method of a multi-mode wireless sharing device, characterized in that set in the range of 25Lux to 35Lux. 12. The method of claim 11,
The reference ratio is a control method of a multi-mode wireless sharing device, characterized in that set in the range of 45% to 55%. A computer-readable recording medium recording a program for executing the control method of the multi-mode wireless sharing device of any one of claims 11, 14, 16, and 19 to 20 in a computer. Claims 11, 14 to 16, and stored in a computer-readable recording medium to execute the control method of the multi-mode wireless sharing device of any one of claims 19 to 20 in combination with hardware. application. A computer program stored in a computer-readable recording medium to execute the control method of the multi-mode wireless sharing device of any one of claims 11, 14 to 16, and 19 to 20 in a computer. .

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