KR20160079419A - Method for notifying communication condition of an area and unmanned aerial vehicle for the same - Google Patents

Abstract

The present invention relates to a method for indicating a coverage area and an unmanned aerial vehicle for the same. The method for indicating a coverage area according to an embodiment of the present invention comprises: a flying step of making a flight along a preset path, by an unmanned aerial vehicle; a measurement step of measuring communication sensitivity by setting a measurement area in a flying radius zone set on the preset path, by the unmanned aerial vehicle; a determination step of determining the communication state of the measurement area by using the communication sensitivity of the measurement area, by the unmanned aerial vehicle; and an indication step of indicating that the measurement area is a coverage area by making a circular flight over the measurement area when the communication state of the measurement area is determined as good, by the unmanned aerial vehicle. The method of the present invention can intuitively inform mobile communication users of the coverage area by using the unmanned aerial vehicle.

Description

Field of the Invention < RTI ID = 0.0 > Field of the Invention < / RTI >

Field of the Invention [0002] The present invention relates to a communication area indicating method and an unmanned aerial vehicle for the same, and more particularly to a communication area indicating method capable of informing a communication possible area by using an unmanned aerial vehicle and a unmanned aerial vehicle for the same.

In a large-scale performance hall, a playground, a cultural event venue, etc., mobile communication users are often overcrowded. In this case, the communication environment of mobile communication becomes poor. That is, a call service, a text service, a data service, etc. using mobile communication may become impossible due to an excessive call connection request or the like. In this case, since there is no way for mobile communication users to intuitively know which point corresponds to the communicable area, mobile communication users have to search for a communicable area while watching an antenna icon of the mobile communication terminal device directly.

Conventionally, a technology for providing a wireless LAN connection in the air by floating a wireless router or the like in the air has been proposed. However, since the effective distance of a wireless LAN to be provided is short and the number of available wireless LANs is limited, It is difficult to solve the problem. In addition, in the case of a wireless router that has been floated in the air, there is a problem in that it may cause damage to persons or property at the time of a fall.

The present application aims to provide a communication area indication method and an unmanned aerial vehicle for this purpose, which can notify a communication available area by using an unmanned aerial vehicle.

According to an embodiment of the present invention, there is provided a method of displaying a communication area, the method comprising: a flight step of flying an unmanned aerial vehicle along a predetermined route; A measurement step of measuring a communication sensitivity by setting a measurement area within a flight radius area set within the predetermined path of the unmanned aerial vehicle; A discriminating step of discriminating a communication state of the measurement area by using the communication sensitivity of the measurement area; And a display step of indicating that the unmanned airplane has turned over the measurement area and the measurement area is a communicable area if the communication state of the measurement area is determined to be good.

Here, the flight step may set a route connecting the plurality of communication repeaters to the predetermined route, and may set the flight radius area within the predetermined distance range based on the set route.

Here, the measuring step may set the measurement area according to the traveling direction of the unmanned aerial vehicle.

Herein, the measuring step may set the traveling direction in a direction in which the unmanned air vehicle increases the measured communication sensitivity.

Wherein the determining step comprises the steps of: extracting a traffic intensity and a traffic density in the measurement area using the communication sensitivity of the unmanned aerial vehicle, and using the traffic intensity and the traffic density, Can be determined.

Here, the determining step may determine that the communication state of the measurement area is good if the traffic intensity is less than or equal to a predetermined threshold strength value, and the traffic density is less than a predetermined threshold density value.

Wherein the determining step calculates a bit error rate (BER) in the measurement area using the extracted traffic intensity and the traffic density, and if the bit error rate is less than a preset threshold error rate, Can be determined as good communication.

Here, the display step may be such that the unmanned air vehicle repeats the above-mentioned communication area over the predetermined display path and turns around.

Here, in the displaying step, the unmanned aerial vehicle may emit a display lamp when the vehicle is turning over the communicable area.

Meanwhile, the communication coverage area displaying method according to an embodiment of the present invention is characterized in that when the communication sensitivity of the communicable area becomes lower, the unmanned air vehicle interrupts the circulating flight and performs a re-searching step of flying along the predetermined route .

Here, the rediscover step may determine whether to stop the turning flight by using the amount of traffic per hour that is concentrated in the communication repeater corresponding to the communicable area during the turnaround flight.

The rediscovering step may stop the turning flight and fly along the predetermined route if the amount of traffic per hour is equal to or greater than a predetermined threshold ratio.

Wherein the rediscovering step calculates a total retention time multiplied by the average traffic retention time multiplied by the number of average traffic calls centered on the communication repeater corresponding to the coverage area during the turnaround, You can decide whether to stop the flight.

The rediscovering step may stop the turning flight and fly along the preset route if the total holding time is equal to or greater than a predetermined time limit.

The method of displaying a communication area according to an embodiment of the present invention may further include a location information transmitting step in which an unmanned aerial vehicle transmits location information on the communicable area to a server on the ground.

Wherein the location information transmission step includes the steps of photographing a vertical lower portion of the unmanned aerial vehicle when the unmannurized air vehicle receives a request signal; A process of extracting GPS (Global Positioning System) coordinate information for a vertical lower portion of the unmanned aerial vehicle; And transmitting the photograph and GPS coordinate information included in the location information to the server.

The unmanned aerial vehicle according to an embodiment of the present invention includes a flight control unit for setting a flight path according to a predetermined path and a flight control signal; A measurement unit that sets a measurement area according to the flight path and measures communication sensitivity within the measurement area; A determination unit for determining a communication state of the measurement area using the communication sensitivity of the measurement area; And a turning flight control unit for generating the flight control signal to fly over the measurement area if the communication state of the measurement area is determined to be good.

In addition, the means for solving the above-mentioned problems are not all enumerating the features of the present invention. The various features of the present invention and the advantages and effects thereof will be more fully understood by reference to the following specific embodiments.

According to the method of displaying a communication area according to an embodiment of the present invention and the unmanned aerial vehicle for the same, it is possible to intuitively inform a mobile communication user of a communication area using an unmanned air vehicle.

According to an embodiment of the present invention, the method for displaying the communication area and the unmanned aerial vehicle for the same can provide location information such as photographs and GPS coordinate information of the communication available area at the request of the mobile communication user. Therefore, the mobile communication user can easily move to the communicable area with reference to the location information.

1 is a block diagram illustrating an unmanned aerial vehicle according to an embodiment of the present invention.
FIG. 2 and FIG. 3 are schematic views showing a display of a communication enabled area using an unmanned aerial vehicle according to an embodiment of the present invention.
4 is a flowchart showing a communication coverage area displaying method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the drawings, like reference numerals are used throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

1 is a block diagram illustrating an unmanned aerial vehicle according to an embodiment of the present invention.

Referring to FIG. 1, an unmanned aerial vehicle according to an embodiment of the present invention may include a flight control unit 110, a measurement unit 120, a determination unit 130, a turning flight control unit 140, and a display unit 150 have.

Hereinafter, an unmanned aerial vehicle according to an embodiment of the present invention will be described with reference to FIG.

The flight control unit 110 can set the flight path according to the predetermined route and the flight control signal. Here, the predetermined path may be a path connecting a plurality of communication repeaters, and the flying radius may be limited within a predetermined distance range based on the set path. Accordingly, the flight control unit 110 can autonomously set the flight path within the range of the flying radius while moving along the predetermined path, and the unmanned air vehicle can fly along the flight path set by the flight control unit 110 have. The predetermined path and radius may be input into the flight control unit 110 before the flight of the unmanned air vehicle. Meanwhile, the flight control signal may be input from the measurement unit 110 or the swing flight control unit 140, and may be input from a control device or the like located on the ground depending on circumstances.

The measurement unit 120 may set the measurement area according to the flight path and measure the communication sensitivity within the measurement area. For example, the measurement area can be set to a radius of 10 m ahead according to the flight path, and the communication sensitivity within the measurement area can be detected using a device such as a communication antenna. At this time, it is possible to measure the communication sensitivity within the measurement area by applying the same algorithm as the reception sensitivity display of the mobile communication terminal or the like. Here, the measuring unit 120 can find a direction in which the communication sensitivity increases using the measured communication sensitivity, and can generate a flight control signal for changing the flight path in the direction of increasing the communication sensitivity .

The determination unit 130 may determine the communication state of the measurement area using the communication sensitivity of the measurement area. Specifically, the determination unit 130 can extract the traffic intensity in the measurement area using the communication sensitivity, and can determine the communication state of the measurement area using the ridge density. Here, the rerouting can be calculated by dividing the amount of traffic concentrated in the communication repeater corresponding to the measurement area by the measurement time, or by multiplying the average number of calls concentrated in the communication repeater by the average traffic retention time. The determination unit 130 can receive the amount of traffic, the number of average calls, the average traffic retention time, and the like, which are concentrated in the communication repeater for calculating the call density, from the communication repeater when measuring the communication sensitivity. Therefore, the determining unit 130 determines that communication is good when the calculated rho density is equal to or less than the predetermined threshold value, and determines that communication is defective when the calculated rho density exceeds the threshold.

Also, according to an embodiment, the determination unit 130 may calculate a bit error rate (BER) in a measurement area using the extracted rerondensity, and may determine a bit error rate The communication state can be determined. That is, if the bit error rate is below the predetermined threshold error rate, it is determined that communication is good, and if the bit error rate exceeds the threshold error rate, it can be determined that the communication is bad.

When the communication state of the measurement area is determined to be good, the rotation control unit 140 may generate a flight control signal to fly over the measurement area. That is, when the communication state of the measurement area is good, the measurement area corresponds to the communication coverage area, so that it is necessary for the mobile communication user to inform that the measurement area corresponds to the communication coverage area. Accordingly, the turning flight control unit 140 can generate the flight control signal so that the unmanned airplane can fly over the communicable area. In this case, the mobile communication users visually detect the turning flight of the unmanned aerial vehicle, so that the unmanned air vehicle can recognize that the area where the unmanned aerial vehicle is turning is in the communication available area.

At this time, the display unit 150 included in the unmanned aerial vehicle can emit light so that the mobile communication user can more easily detect the turning flight of the unmanned aerial vehicle, and it is possible to discriminate whether or not communication can be performed according to the color of light emitted It is possible. For example, a green light may be emitted when the unmanned aerial vehicle indicates that the unmanned aerial vehicle is in a communicatable area, and may emit red light when the unmanned aerial vehicle is flying in the measurement area of a poor communication state. In addition, the display unit 150 may indicate that the area is audibly communicable, such as announcement broadcasting.

Meanwhile, the measuring unit 120 may measure the communication sensitivity and the determining unit 130 may determine the communication state based on the measured communication sensitivity. Accordingly, when the number of mobile communication users increases in the coverage area during the turnover and the communication state is determined to be a communication failure, the turning flight control section 140 can stop outputting the flight control signal for turning flight, The control unit 110 may proceed to a predetermined flight path. That is, it can fly to the next communication repeater.

As shown in FIG. 2, a path via a plurality of communication repeaters b1, b2, b3, b4, and b5 may be preset in the unmanned aerial vehicle according to an exemplary embodiment of the present invention. Herein, the unmanned aerial vehicle can pass without performing the turn-over flight in the communication repeaters b1 and b2 corresponding to the communication failure, and since the communication state of the repeater b3 corresponds to the good communication, the turn- can do. Thereafter, when the communication sensitivity of the repeater b3 is lowered or after a preset time passes, the unmanned aerial vehicle can stop the turning flight and fly to the repeater b4 according to the set route. Since the repeater b4 corresponds to the communication failure, the repeater b5 can move to the repeater b5, and the repeater b5 corresponds to the good communication. If the unmanned aerial vehicle can not find a communication area even after several flights, it is possible to prevent the confusion of the mobile communication users by making a landing at a preset point, and to have time for charging, refueling, maintenance, etc. can do.

Meanwhile, as shown in FIG. 3, the unmanned aerial vehicle according to an embodiment of the present invention can provide information on a communicable area to a mobile communication user. First, the mobile communication terminal m of the mobile communication user can notify the corresponding communication repeater b1 that the mobile communication terminal m has been in the shadow area of the communication failure state for a predetermined time or more. At this time, the mobile communication terminal m may transmit GPS information corresponding to its own location together. Here, it is possible to inform that the mobile communication user is out of the temporary shadow area, or to be able to temporarily communicate within the shadow area.

After that, the communication repeater can request the server s for location information on the communicable area, and the server s can request the location information to the unmanned aerial vehicle 100 that is turning. Upon receiving the request, the unmanned air vehicle 100 photographs a photograph of the vertical lower portion p of the unmanned air vehicle 100 and extracts GPS information of the vertical portion p to generate the location information have. Thereafter, the unmanned air vehicle 100 can transmit the location information to the server s, and the server s can transmit the location information to the mobile communication terminal m. Therefore, by using the location information received using the mobile communication terminal m, the mobile communication user can grasp the position of the communicable area and can move to the communicable area.

4 is a flowchart showing a communication coverage area displaying method according to an embodiment of the present invention.

Referring to FIG. 4, a method of displaying a communication area according to an embodiment of the present invention includes a flight step S100, a measurement step S200, a determination step S300, a display step S400, And a location information transmission step S600.

Hereinafter, a communication coverage area displaying method according to an embodiment of the present invention will be described with reference to FIG.

In the flight step S100, the unmanned aerial vehicle can fly along a predetermined route. Here, the predetermined route may be a route connecting a plurality of communication repeaters, and may be set to a flight radius area of the unmanned aerial vehicle within a predetermined distance range based on the set route. Thus, the unmanned aerial vehicle can fly within the radius of the flight along the predetermined path. The predetermined path and the flight radius zone may be preset before flight of the unmanned aerial vehicle.

In the measurement step S200, the unmanned aerial vehicle can set the measurement area within the flight radius area set in the predetermined route, and then measure the communication sensitivity within the measurement area. Here, the measurement area can be set according to the traveling direction of the unmanned air vehicle, and further, the traveling direction of the unmanned air vehicle can be set to a direction in which the measured communication sensitivity increases. In this case, it is possible that the air vehicle can move to the measurement area where the communication state is good because the air vehicle can move to find the position where the communication sensitivity increases. However, it may be limited by the above-mentioned flight path and flight radius area. According to the embodiment, it is also possible to measure the communication sensitivity by setting each of the communication repeaters to the measurement area. Meanwhile, in the measurement step S200, equipment such as a communication antenna provided in an unmanned aerial vehicle can be used, and communication sensitivity within the measurement area can be measured by applying the same algorithm as the reception sensitivity indication of the mobile communication terminal.

In the determining step S300, the unmanned aerial vehicle can determine the communication state of the measurement area using the communication sensitivity of the measurement area. Specifically, the communication intensity can be used to extract the traffic intensity in the measurement area, and the communication state of the measurement area can be determined using the ridge density. Here, the rerouting can be calculated by dividing the amount of traffic concentrated in the communication repeater corresponding to the measurement area by the measurement time, or by multiplying the average number of calls concentrated in the communication repeater by the average traffic retention time. The amount of traffic, average number of calls, average traffic retention time, etc., which are concentrated in the communication repeater for calculating the reronding can be received from the communication repeater when measuring the communication sensitivity. Therefore, in the discrimination step S300, it is determined that communication is good when the calculated rho density is equal to or less than the predetermined threshold value, and when it is higher than the threshold value, communication is judged as poor. According to an embodiment of the present invention, it is also possible to calculate a bit error rate (BER) in a measurement area using the extracted rerondensity, and to determine a communication state in the measurement area according to the bit error rate have. That is, if the bit error rate is below the predetermined threshold error rate, it is determined that communication is good, and if the bit error rate exceeds the threshold error rate, it can be determined that the communication is bad.

Thereafter, when the communication state is determined to be a communication failure, the unmanned aerial vehicle can continuously perform the flight according to the predetermined route (S310). On the other hand, if the communication state is determined to be good, the process may proceed to the display step S400 (S310).

In the display step S400, if the communication state of the measurement area is determined to be good, the unmanned airplane can fly over the measurement area to indicate that the measurement area is a communication enabled area. Herein, the unmanned aerial vehicle can repeatedly fly over the communication area in accordance with a predetermined display path, and the display path may be set in various forms such as a circle or a zigzag. Also, in the display step S400, the indicator lamp may emit light in order to improve visibility of the turning flight of the unmanned aerial vehicle. According to an embodiment of the present invention, it is possible to emit light by blinking or changing the color of the display lamp, or to emit a display lamp of a predetermined color only at the time of turning flight. For example, the unmanned aerial vehicle can emit red light when flying in a measurement area of poor communication condition, and then can emit green light when it is notified that the unmanned aerial vehicle is a communication area through a turnaround flight. In addition, the unmanned aerial vehicle may indicate that the unmanned aerial vehicle is acoustically communicable, such as announcement broadcasting, in order to notify that the unmanned aerial vehicle is a communicable area.

Thereafter, if the communication sensitivity measured in the coverage area is lowered, the re-search step S500 may be performed to stop the swing flight and proceed with the flight along the predetermined route. That is, even during the turning flight in the display step S400, the unmanned aerial vehicle can measure the communication sensitivity of the communicable area, and can determine the communication state based on the measured communication sensitivity. Therefore, when the number of mobile communication users increases in the coverage area during the turnover and the communication state is determined to be a communication failure, the turnover flight can be stopped and the next communication repeater can be moved according to the predetermined flight path.

Meanwhile, in the display step S400, while the unmanned aerial vehicle is turning, a request for location information may be input (S410). That is, the mobile communication terminal located in the shadow area corresponding to the communication defective state can input a request for the location information on the communication available area. In this case, the location information transmission step S600 may be performed to allow the unmanned aerial vehicle to transmit the location information of the communicable area to a server on the ground. Specifically, when the unmanned aerial vehicle receives the request signal in the location information transmission step S600, the unmanned aerial vehicle photographs a photograph of a vertical lower portion and extracts GPS (Global Positioning System) coordinate information of the vertical lower portion can do. Thereafter, the photograph and GPS coordinate information may be included in the location information and transmitted to the server. The server receiving the location information may provide the location information to the mobile communication terminal requesting the location information. Accordingly, the mobile communication user can easily move to the communicable area using the mobile communication terminal that has received the location information.

The present invention is not limited to the above-described embodiments and the accompanying drawings. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: unmanned aerial vehicle 110: flight control unit
120: measuring unit 130:
140: turning flight control section
S100: flight step S200: measurement step
S300: discrimination step S400: display step
S500: Retrieval step S600: Position information transmission step

Claims (13)

A flight phase in which an unmanned aerial vehicle follows a predetermined path;
A measurement step of measuring a communication sensitivity by setting a measurement area within a flight radius area set within the predetermined path of the unmanned aerial vehicle;
A discriminating step of discriminating a communication state of the measurement area by using the communication sensitivity of the measurement area; And
And displaying the unmanned aerial vehicle flying over the measurement area so that the measurement area is a communicable area if the communication state of the measurement area is determined to be good.
2. The method of claim 1,
Setting a route connecting the plurality of communication repeaters to the predetermined route and setting the range to be within the predetermined distance range based on the set route.
2. The method of claim 1,
And setting the measurement area according to a traveling direction of the unmanned air vehicle.
4. The method of claim 3, wherein the measuring step
Wherein the traveling direction of the unmanned air vehicle is set in a direction in which the measured communication sensitivity is increased.
2. The method of claim 1,
Wherein the unmanned aerial vehicle extracts a traffic intensity in the measurement area using the communication sensitivity and determines a communication state of the measurement area using the ridge density.
6. The method of claim 5,
And determining that the communication state of the measurement area is good if the rerouting is less than or equal to a predetermined threshold value.
6. The method of claim 5,
Calculating a bit error rate (BER) in the measurement area using the extracted rerouting, and determining a communication state of the measurement area as a communication good if the bit error rate is less than a predetermined threshold error rate Display method.
2. The method according to claim 1,
Wherein the unmanned aerial vehicle repeatedly travels over the communication available area in accordance with a predetermined display route.
9. The method of claim 8,
Wherein the unmanned aerial vehicle emits a display lamp when the vehicle is turning over the communication available area.
The method according to claim 1,
Further comprising: a re-searching step of, when the communication sensitivity of the communicable area becomes lower, the unmanned air vehicle stopping the turn-over flight and flying along the predetermined route.
The method according to claim 1,
And a location information transmitting step in which the unmanned air vehicle transmits location information on the communicable area to a server on the ground.
12. The method as claimed in claim 11, wherein the step
A step of photographing a vertical lower portion of the unmanned aerial vehicle when the unmanned aerial vehicle receives the request signal;
A process of extracting GPS (Global Positioning System) coordinate information for a vertical lower portion of the unmanned aerial vehicle; And
And transmitting the photograph and GPS coordinate information to the server by including the photograph and GPS coordinate information in the position information.
A flight control unit for setting a flight path according to a predetermined route and a flight control signal;
A measurement unit that sets a measurement area according to the flight path and measures communication sensitivity within the measurement area;
A determination unit for determining a communication state of the measurement area using the communication sensitivity of the measurement area; And
And a turning flight control unit for generating the flight control signal so as to fly over the measurement area if the communication state of the measurement area is determined to be good.

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