JP2018096928A - Radiation power measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation power measuring system that is easy to install and can conduct accurate measurement at all necessary points on a radiation surface.SOLUTION: A radiation power measuring system includes a base station, a drone, and a drone control device. The drone includes a reception antenna for receiving a radio wave arriving from the base station and a power measuring unit for measuring power of the received radio wave. The drone control device includes a position and attitude control unit for moving the drone to a prescribed position away from the base station by prescribed distance and rotates the drone so that an arrival direction of the radio wave corresponds to an orientation of the reception antenna.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a radiated power measurement system that measures the power of radio waves radiated into space.

  In recent years, an array antenna system that controls radio waves radiated from a plurality of antennas in a base station and has directivity so as to obtain strong radiation intensity in a specific direction has been studied. However, if an array antenna malfunctions and the array antenna does not have the desired directivity, not only the communication quality in the own cell deteriorates, but also interference with adjacent cells increases, and the communication capacity deteriorates significantly. To do. Therefore, in terms of operation, it is necessary to accurately measure the directivity of the base station. Since the directivity of the base station can be obtained by measuring the radiated power over the air (OTA), an efficient OTA measurement system is required. For example, Non-Patent Document 1 discloses an OTA measurement system.

  A conventional OTA measurement system 9 that measures the transmission power of the base station 91 will be described with reference to FIG. The OTA measurement system 9 includes a base station 91, a transmission antenna 92 connected to the base station 91, a reception antenna 93 installed at a predetermined distance from the base station 91, and a reception antenna 93 for fixing the reception antenna 93. The power supply unit 95 includes a support 94 and a power measuring unit 95 that measures the power of the radio wave received by the receiving antenna 93.

  The reception antenna 93 receives the power radiated from the transmission antenna 92. The power meter 95 measures the power of the received radio wave. The propagation loss is obtained from the gains of the transmission antenna 92 and the reception antenna 93 and the distance between the base station 91 and the reception antenna 93. Therefore, the transmission power of the base station 91 can be measured from the display value of the power measuring unit 95 and the propagation loss. In general, when it is necessary to aim for radiated power in a plurality of directions, the receiving antenna 93 is moved to a desired position, and the transmission power in the direction of the measurement point can be measured from the obtained power value. However, since the propagation loss depends on the distance from the base station 91, distance measurement is required every time in order to correctly measure the propagation loss.

Toyo Technica, “OTA measurement system (anechoic chamber)”, [online], Toyo Technica, [November 17, 2016 search], Internet <URL: http://www.toyo.co.jp/emc/products / detail / id = 1754>

  According to the conventional OTA power measurement system 9, when measuring directivity, the measurement system including the reception antenna 93 is moved to a plurality of points on the radio wave radiation surface around the base station 91, and the received power is measured for each point. Must be measured. Since the radio wave radiation surface is three-dimensionally distributed, it is necessary to move the measurement system including the receiving antenna 93 in the three axial directions of length, width, and height. As a result, it takes a lot of time to install the measurement system, and the productivity is low. Furthermore, when measuring in an anechoic chamber, the position of the wave absorber must be adjusted each time in order to move the receiving antenna 93. In addition, a support pole 94 and the like are required to install the receiving antenna 93. However, when a specific radiation surface is measured, since the support pole and the like affect the radiation performance of the radio wave, measurement cannot be performed. In addition, when a reflected wave or the like by the column 94 or the like is input to the receiving antenna 93, an error occurs in the measurement result.

  An object of the present invention is to provide a radiated power measurement system capable of performing highly accurate measurement at all points on a radiation surface that are easy to install and required.

  The radiated power measurement system of the present invention includes a base station, a drone, and a drone control device.

  The drone includes a receiving antenna and a power measuring unit. The receiving antenna receives radio waves coming from the base station. The power measuring unit measures the power of the received radio wave.

  The drone control device includes a position and orientation control unit. The position and orientation control unit moves the drone to a predetermined position away from the base station by a predetermined distance, and rotates the drone so that the arrival direction of the radio wave corresponds to the direction of the receiving antenna.

  According to the radiated power measuring system of the present invention, it is possible to measure with high accuracy at all points on the radiating surface which are easy to install and required.

The block diagram which shows the structure of the conventional OTA measurement system. 1 is a block diagram illustrating a configuration of a radiated power measurement system according to Embodiment 1. FIG. The conceptual diagram explaining the rotation direction of a drone. The block diagram which shows the structure of the radiation power measurement system of Example 2. FIG. FIG. 6 is a block diagram illustrating a configuration of a radiated power measurement system according to a third embodiment. The block diagram which shows the structure of the radiation power measurement system of the modification 1. FIG. The block diagram which shows the structure of the radiation power measurement system of Example 4. FIG. FIG. 9 is a block diagram illustrating a configuration of a radiated power measurement system according to a fifth embodiment. FIG. 10 is a block diagram illustrating a configuration of a radiated power measurement system according to a sixth embodiment. The block diagram which shows the structural example of the general purpose system or computer device which can be used in order to implement | achieve the base station, drone, and drone control apparatus which are described in an Example.

  Hereinafter, embodiments of the present invention will be described in detail. In addition, the same number is attached | subjected to the structure part which has the same function, and duplication description is abbreviate | omitted.

  Hereinafter, the radiated power measurement system 1 according to the first embodiment will be described with reference to FIG. As shown in FIG. 1, the radiated power measurement system 1 according to the present embodiment includes a base station 91, a transmission antenna 92 connected to the base station 91, a drone 11, and a drone control device 12. The drone 11 includes a receiving antenna 93 and a power measuring unit 95. The drone control device 12 includes a position / orientation control unit 121. It is assumed that the drone 11 and the drone control device 12 can communicate via the network 96. A drone is also referred to as an unmanned aerial vehicle (Unmanned Aerial Vehicle, Uninhabited Aerial Vehicle, UAV), and is a general term for an aircraft that can fly unmanned and remotely controlled or automatically controlled. A drone (unmanned aerial vehicle) can be made to fly by remote control or autopilot among airplanes that can be used by air, rotary wing aircraft, gliders, airships, and other devices that cannot be ridden structurally It is a term that refers to all things. Drones include aircraft of various sizes and shapes. Military drones have many large aircraft, and commercial drones are small to medium sized, with many rotary wing aircraft (multicopters).

  The receiving antenna 93 receives radio waves coming from the base station 91. The power measuring unit 95 measures the power of the received radio wave. Since the method for measuring the power is well known, the description thereof is omitted. The position / orientation control unit 121 moves the drone 11 to a predetermined position (a predetermined position on the radio wave emission surface equidistant from the base station 91) away from the base station 91, and the arrival direction of the radio wave and the receiving antenna The drone 11 is rotated so that the direction of the line 93 corresponds (the direction in which the reception power of the reception antenna 93 is maximized matches the arrival direction of the radio wave). Alternatively, the receiving antenna 93 is rotated so that the arrival direction and direction of the radio wave correspond to each other.

  The rotation of the drone 11 executed by the position / orientation control unit 121 will be described with reference to FIG. As shown in FIG. 3, the position and orientation control unit 121 can rotate the drone 11 in the vertical direction and the horizontal direction. The direction from the front to the rear of the drone 11 or the direction from the rear to the front is the x-axis direction, and is orthogonal to the x-axis direction. The direction is perpendicular to both the x-axis and the y-axis, and the direction from the bottom to the top of the drone 11 or the direction from the top to the bottom is defined as the z-axis direction. At this time, the rotation with the z axis as the rotation axis is called yawing, and the yawing angle is represented by θ. The rotation with the y axis as the rotation axis is called pitching, and the pitching angle is represented by φ.

  The position / orientation control unit 121 causes the drone 11 to yaw and pitch to match the direction in which the reception power of the reception antenna 93 is maximized with the arrival direction of the radio wave.

  Thus, according to the radiated power measurement system 1 of the present embodiment, it is easy to move the receiving antenna 93 to each measurement point on the radio wave radiation surface. In addition, since it is not necessary to perform calibration work at each measurement point, the time required for configuring the measurement system can be greatly reduced. Further, since the radiated power at a predetermined position on the radio wave radiation surface of the base station 91 is measured by the drone 11 movable in the vertical and horizontal height directions, it is possible to easily perform a short-time measurement without moving the support column. In addition, since the receiving antenna 93 is mounted on the drone 11, a support or the like is not required, and not only measurement points that have been impossible to measure in the past can be measured, but also deterioration in measurement accuracy due to reflected waves on the support and the like is avoided. can do.

  When there is an interference wave from the outside, if the interference wave (for example, radiated power from another base station using the same band in an adjacent cell) is received by the receiving antenna 93, the base to be originally measured The radiated power from the station 91 cannot be measured accurately. Example 2 discloses a radiated power measurement system that solves the above-described problems.

  Hereinafter, the radiated power measurement system 2 according to the second embodiment will be described with reference to FIG. As shown in FIG. 4, the radiated power measurement system 2 of the present embodiment includes a base station 91, a transmission antenna 92 connected to the base station 91, a drone 11, and a drone control device 22. The other configuration requirements are the same as in the first embodiment. The drone control device 22 includes a position / orientation control unit 221 and an interference wave direction estimation unit 222. It is assumed that the drone 11 and the drone control device 22 can communicate via the network 96.

  The interference wave direction estimation unit 222 estimates the arrival direction of the interference wave based on the power measured by the power measurement unit 95. The position / orientation control unit 221 moves the drone 11 to a predetermined position (predetermined position on the radio wave emission surface equidistant from the base station 91) away from the base station 91, and arrival of the estimated interference wave The drone 11 is rotated so that the direction corresponds to the direction of the reception antenna 93 (so that the direction in which the reception power of the reception antenna 93 is maximum matches the arrival direction of the interference wave). In this state, the power of the radio wave received by the receiving antenna 93 is measured by the power measuring unit 95, whereby the interference power from the outside can be measured. If the incoming wave is an interference wave, the received signal is demodulated, the SNR of the demodulated signal is measured, and if the SNR is below a certain value, it is determined as an interference wave. Alternatively, a wave arriving from an arrival direction other than the wave having the largest measured power by rotating the drone 11 may be determined as an interference wave.

  Thereafter, the position / orientation control unit 221 performs the same operation as in the first embodiment. That is, the direction of arrival of radio waves from the base station 91 corresponds to the direction of the reception antenna 93 (the direction in which the reception power of the reception antenna 93 is maximized matches the direction of arrival of radio waves from the base station 91). ) Rotate the drone 11.

  Thus, according to the radiation power measurement system 2 of the present embodiment, desired power can be accurately measured by considering the interference wave power in addition to the effects of the first embodiment.

  Hereinafter, the radiated power measurement system 3 according to the third embodiment will be described with reference to FIG. As shown in FIG. 5, the radiated power measurement system 3 of the present embodiment includes a base station 91, a transmission antenna 92 connected to the base station 91, a drone 31, and a drone control device 32, and the drone 31 and the drone The components other than the control device 32 are the same as those in the first and second embodiments. The drone 31 includes a reception antenna 93, a power measurement unit 95, a measurement point storage unit 311, and a position / orientation control unit 312. The receiving antenna 93 and the power measuring unit 95 are the same as in the first and second embodiments. The drone control device 32 includes a drone position transmission unit 321. It is assumed that the drone 31 and the drone control device 32 can communicate via the network 96.

  The measurement point storage unit 311 of the drone 31 stores in advance predetermined coordinates that are a predetermined distance away from the base station 91 as measurement points. The measurement point storage unit 311 of the drone 31 may store the position information of the base station 91 in advance.

  The drone position transmission unit 321 of the drone control device 32 transmits the current position coordinates of the drone 31 to the drone 31.

  Based on the current position coordinates of the drone 31 received from the drone control device 32 and the measurement points stored in the measurement point storage unit 311, the position / orientation control unit 312 of the drone 31 moves its own device to a predetermined position (base station 91 To the radiation plane at the same distance from the base station 91, and rotates itself so that the arrival direction of the radio wave from the base station 91 corresponds to the direction of the reception antenna 93. When the position information of the base station 91 is stored in the measurement point storage unit 311, the position / orientation control unit 312 is a direction in which the reception power of the reception antenna 93 is maximized in the direction toward the base station 91 specified in advance. You may rotate your aircraft so that Further, the position / orientation control unit 312 measures the orientation of the base station 91 from the location information of the base station 91 and the location information of the drone, and matches the orientation of the base station 91 with the direction in which the reception power of the receiving antenna is maximized. You may rotate your own machine.

  The drone position transmission unit 321 will be described. For example, a satellite navigation system represented by car navigation can be used for outdoor position information. In addition, the drone position transmission unit 321 obtains the position information of the measurement point on the radiation surface from the known position information of the base station 91, and transmits the position information of the measurement point and the position information of the base station 91 to the drone 31. May be. In this case, the measurement point storage unit 311 is not necessary.

  As described above, according to the radiated power measurement system 3 of the present embodiment, the drone 31 performs the same movement control and rotation control as that of the own device, thereby obtaining the same effects as those of the first embodiment.

[Modification 1]
Hereinafter, the radiated power measurement system 3 </ b> A of Modification 1 which is a modification of Embodiment 3 will be described with reference to FIG. 6. As shown in FIG. 6, the radiated power measurement system 3A of the present modification includes a base station 91, a transmission antenna 92 connected to the base station 91, a drone 31, a drone control device 32A, and a first reference signal transmission. For the configuration requirements other than the drone control device 32A, the first reference signal transmitter 33-1 and the second reference signal transmitter 33-2, the device 33-1 and the second reference signal transmitter 33-2 are implemented. Similar to Example 3. The drone control device 32A includes a drone position transmission unit 321A.

  In the figure, two reference signal transmitters are illustrated, but any number of reference signal transmitters may be used as long as the number is plural. It is assumed that the reference signal transmitter is time synchronized. The drone position transmission unit 321A of the drone control device 32A acquires the current position coordinates of the drone 31 by measuring the distance difference from each reference signal transmitter to the drone 31 and the time difference of the incoming waves.

  Alternatively, the drone position transmission unit 321A may acquire the current position coordinates of the drone 31 from the reference point 34 and the base station 91, the distance between the reference point 34 and the drone 31, and the direction information as shown in FIG. In this case, the reference signal transmitter is unnecessary.

  Hereinafter, the radiated power measurement system 4 according to the fourth embodiment will be described with reference to FIG. As shown in FIG. 7, the radiated power measurement system 4 of the present embodiment includes a base station 91, a transmission antenna 92 connected to the base station 91, a drone 41, and a drone control device 42. The components other than the control device 42 are the same as those in the first and second embodiments. The drone 41 includes a receiving antenna 93, a power measurement unit 95, a distance / direction measurement unit 411, and a position / orientation control unit 412. The receiving antenna 93 and the power measuring unit 95 are the same as in the first, second, and third embodiments. The drone control device 42 includes a measurement point transmission unit 421. It is assumed that the drone 41 and the drone control device 42 can communicate via the network 96.

  The distance azimuth measuring unit 411 measures the distance between itself and the base station 91 and the azimuth of the base station 91 (direction in which the base station 42 is viewed from the drone 41).

  The measurement point transmission unit 421 of the drone control device 42 transmits a predetermined coordinate that is a predetermined distance away from the base station 91 to the drone 41 as a measurement point.

  The position / orientation control unit 412 moves the own device to a predetermined position based on the measured distance and direction and the measurement point received from the drone control device 42, and rotates the own device in a predetermined direction.

  The distance measurement of the distance direction measuring unit 411 will be described. In the distance measurement of the distance direction measuring unit 411, for example, a distance measuring technique used in a camera or the like can be applied. The measurement principle includes a triangulation system that converts the imaging position of the light-receiving element due to a change in distance to a distance, and a time-of-interest that measures the time from light irradiation until light reception and converts the time difference into distance.・ There is a flight type. Since these measurement principles are known, they will not be described in detail.

  The azimuth | direction measurement of the distance azimuth | direction measuring part 411 is demonstrated. In the azimuth measurement of the distance azimuth measuring unit 411, for example, the state directed to a specific azimuth is set as the initial state, the drone 41 is rotated from the initial state, and the base station 91 is rotated from the rotation angle of the drone 41 at which the input power becomes maximum. Measure orientation. The specific orientation may be used with reference to the direction measured by an orientation magnet or the like. For example, the distance azimuth measuring unit 411 may measure the azimuth of the base station 91 by designating a reference direction and measuring an angle in a horizontal plane and an angle in a vertical plane.

  Thus, according to the radiated power measurement system 4 of the present embodiment, the drone 41 measures the distance between the own device and the base station 91 and the direction of the base station 91, and performs the movement control and rotation control of the own device. Thus, the same effects as those of the first embodiment can be obtained.

  When an interference wave arrives from the same direction as the radio wave from the base station 91 or an approximate direction, it may be difficult to separate the influence of the interference wave from the measured power. In the fifth embodiment, a radiated power measurement system that solves the above problem is disclosed.

  Hereinafter, the radiated power measurement system 5 according to the fifth embodiment will be described with reference to FIG. As shown in FIG. 8, the radiated power measurement system 5 of the present embodiment includes a base station 91, a transmission antenna 92 connected to the base station 91, a first drone 51-1, and a second drone 51-. 2 and the drone control device 52, and the configuration requirements other than the first drone 51-1, the second drone 51-2, and the drone control device 52 are the same as those in the first to fourth embodiments. The first drone 51-1 and the second drone 51-2 include at least a receiving antenna 93 and a power measuring unit 95 similar to those in the first to fourth embodiments. Although not shown, the first drone 51-1 and the second drone 51-2 are disclosed in the measurement point storage unit 311 and the position / orientation control unit 312 disclosed in the third embodiment or in the fourth embodiment. A distance / orientation measurement unit 411 and a position / orientation control unit 412 may be included. Further, the number of drones is not limited to two shown in the figure, and any number may be used as long as it is plural. The drone control device 52 includes a drone pair position / attitude control unit 521 and an interference wave power subtraction unit 522. The first drone 51-1, the second drone 51-2, and the drone control device 52 are assumed to be able to communicate via the network 96.

  The drone pair position / attitude control unit 521 moves the first drone 51-1 to a predetermined position away from the base station 91 by a predetermined distance, and the first drone 51-1 with the position of the base station 91 as the center of symmetry. The second drone 51-2 is moved so that the position of the second drone 51-2 and the position of the second drone 51-2 are point targets, and the arrival direction of the radio wave from the base station 91 corresponds to the direction of the receiving antenna 93. Thus, the first drone 51-1 is rotated, and the second drone 51-2 is rotated in the same direction as the first drone 51-1.

  The interference wave power subtraction unit 522 obtains the interference wave power in the first drone 51-1, using the power measurement value obtained in the second drone 51-2, and measures the power of the first drone 51-1. Subtract from the value. Thereby, the influence of an interference wave can be reduced.

  The reduction of the influence of interference waves will be described. For example, when the radiation power of the base station 91 is measured using only the first drone 51-1, if there is an interference wave coming from the same direction as the base station 91, it is impossible to distinguish the interference wave from the desired wave. Since it is possible, it cannot be separated and the measurement result is the total power of the desired wave and the interference wave. Here, with the position of the base station 91 as the center of symmetry, the second drone 51-2 is arranged at a point-symmetrical position of the first drone 51-1, and the receiving antenna 93 of the second drone 51-2 is By directing in the same direction as the receiving antenna 93 of the first drone 51-1, the interference wave power (of the interference wave coming from the same direction as the desired wave) is measured in the second drone 51-2. Since the first drone 51-1 and the second drone 51-2 are in point-symmetric positions with respect to the base station 91, the distance between the first drone 51-1 and the second drone 51-2 is known. It is. From the reception power of the second drone 51-2 and the propagation loss due to the distance between the drones, the interference wave power arriving at the first drone 51-1 is known. By subtracting from the measured power in the first drone 51-1, the power of the desired wave can be accurately measured.

  Thus, according to the radiated power measurement system 5 of the present embodiment, in addition to the effects of the first to fourth embodiments, even if the arrival directions of the interference wave and the desired wave match or approximate, The power of the desired wave can be measured accurately.

  Hereinafter, the radiated power measurement system 6 of Example 6 in which the measurement system is arranged in an anechoic chamber will be described with reference to FIG. As shown in FIG. 9, the radiated power measurement system 6 of the present embodiment includes an anechoic chamber 63, a plurality of scatterers 64-1, 64-2,..., 64-N arranged in the anechoic chamber 63, A base station 91, a transmission antenna 92 connected to the base station 91, a drone 11 (may be a drone 31, a drone 41, a first drone 51-1, a second drone 51-2), and drone control Including the device 12 (which may be the drone control device 22, the drone control device 32, the drone control device 32A, the drone control device 42, the drone control device 52), the anechoic chamber 63, the scatterers 64-1, 64-2,. The configuration requirements other than 64-N are the same as those in the first to fifth embodiments. At this time, at least the base station 91 and the drone 11 are arranged in the anechoic chamber 63. Assume that the scatterers 64-1, 64-2,..., 64-N are arranged around the base station 91. The radio waves radiated from the base station 91 are reflected by the scatterers 64-1, 64-2,..., 64-N to form a multipath environment. In this embodiment, measurement is performed in a so-called dynamic fading environment.

  As the drone 11 moves in the space inside the anechoic chamber 63, the relative positional relationship with each scattered wave changes, so that the amplitude and phase of the scattered wave at the receiving antenna 93 fluctuate over time, resulting in a dynamic fading environment. Form.

  Thus, according to the radiated power measurement system 6 of the present embodiment, since the drone 11 flies and moves to the measurement point, it is necessary to change the environment, such as changing the position of the radio wave absorber on the floor surface each time. Absent. Thereby, the working time required for measurement can be greatly shortened.

<Hardware configuration>
In addition, the block diagram used for description of the said embodiment (Example) has shown the block of the functional unit. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.

  For example, a base station, a drone, a drone control device, and the like in an embodiment of the present invention may function as a computer that performs the method of the present invention. FIG. 10 is a diagram illustrating an example of a hardware configuration of the base station, the drone, and the drone control device according to the embodiment of the present invention. The base station, drone, and drone control device described above may be physically configured as a computer device including a processor 11000, a memory 12000, a storage 13000, a communication device 14000, an input device 15000, an output device 16000, a bus 17000, and the like. Good.

  In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the base station, the drone, and the drone control device may be configured to include one or a plurality of the devices illustrated in the figure, or may be configured not to include some devices.

  Each function in the base station, the drone, and the drone control apparatus reads predetermined software (program) on hardware such as the processor 11000 and the memory 12000 so that the processor 11000 performs calculation, and communication by the communication apparatus 14000, This is realized by controlling reading and / or writing of data in the memory 12000 and the storage 13000.

  For example, the processor 11000 controls the entire computer by operating an operating system. The processor 11000 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the position / orientation control unit 121, position / orientation control unit 221, interference wave direction estimation unit 222, measurement point storage unit 311, position / orientation control unit 312, drone position transmission unit 321, drone position transmission unit 321A, distance and direction measurement The unit 411, the position / orientation control unit 412, the measurement point transmission unit 421, the drone pair position / orientation control unit 521, the interference wave power subtraction unit 522, and the like may be implemented by the processor 11000.

  Further, the processor 11000 reads programs (program codes), software modules, and data from the storage 13000 and / or the communication device 14000 to the memory 12000, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the position and orientation control unit 121, the position and orientation control unit 221, the interference wave direction estimation unit 222, the measurement point storage unit 311, the position and orientation control unit 312, the drone position transmission unit 321, the drone position transmission unit 321 </ b> A, and the distance and direction measurement unit 411 The position / orientation control unit 412, the measurement point transmission unit 421, the drone pair position / orientation control unit 521, the interference wave power subtraction unit 522, and the like may be realized by a control program stored in the memory 12000 and operating on the processor 11000. Other functional blocks may be similarly realized. Although the above-described various processes have been described as being executed by one processor 11000, they may be executed simultaneously or sequentially by two or more processors 11000. The processor 11000 may be implemented with one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

  The memory 12000 is a computer-readable recording medium and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be. The memory 12000 may be called a register, a cache, a main memory (main storage device), or the like. The memory 12000 can store programs (program codes), software modules, and the like that can be executed to implement the drone control method according to the embodiment of the present invention.

  The storage 13000 is a computer-readable recording medium such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 13000 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database including a memory 12000 and / or storage 13000, a server, or other suitable medium.

  The communication device 14000 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. For example, a transmission / reception antenna, a transmission / reception unit, and the like included in the above-described base station, drone, drone control device, and the like may be realized by the communication device 14000.

  The input device 15000 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives input from the outside. The output device 16000 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 15000 and the output device 16000 may have an integrated configuration (for example, a touch panel).

  Each device such as the processor 11000 and the memory 12000 is connected by a bus 17000 for communicating information. The bus 17000 may be composed of a single bus or may be composed of different buses between devices.

  Base stations, drones, and drone control devices include microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), etc. Hardware may be included, and a part or all of each functional block may be realized by the hardware. For example, the processor 11000 may be implemented with at least one of these hardware.

<Information notification, signaling>
The notification of information is not limited to the aspect / embodiment described in the present specification, and may be performed by other methods. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof. Further, the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.

<Applicable system>
Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), and W-CDMA. (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), The present invention may be applied to a system using another appropriate system and / or a next generation system extended based on the system.

<Processing procedure>
As long as there is no contradiction, the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be changed. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.

<Operation of base station>
The specific operation assumed to be performed by the base station in this specification may be performed by its upper node in some cases. In a network composed of one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station and / or other network nodes other than the base station (e.g., Obviously, this can be done by MME or S-GW, but not limited to these. Although the case where there is one network node other than the base station in the above is illustrated, a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

<Input / output direction>
Information or the like (* see “Information, Signal” item) can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

<Handling of input / output information, etc.>
Input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

<Judgment method>
The determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).

<Aspect variations>
Each aspect / embodiment described in this specification may be used independently, may be used in combination, or may be switched according to execution. Further, notification of predetermined information (for example, notification of “being X”) is not limited to explicitly performed, but is performed implicitly (for example, without notification of the predetermined information). Also good.

  Although the present invention has been described in detail above, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

<Meaning and interpretation of terms>
1) Software Software, whether it is called software, firmware, middleware, microcode, hardware description language, or another name, is an instruction, instruction set, code, code segment, program code, program, subprogram Software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc. should be interpreted broadly.

  Also, software, instructions, etc. may be transmitted / received via a transmission medium. For example, software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of a transmission medium.

2) Information, signals The information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of

  Note that the terms described in this specification and / or terms necessary for understanding this specification may be replaced with terms having the same or similar meaning. For example, the channel and / or symbol may be a signal. The signal may be a message. In addition, the component carrier (CC) may be called a carrier frequency, a cell, or the like.

3) “System”, “Network”
As used herein, the terms “system” and “network” are used interchangeably.

4) Names of parameters and channels The information and parameters described in this specification may be expressed as absolute values, relative values from predetermined values, or other corresponding values. It may be represented by information. For example, the radio resource may be indicated by an index.

  The names used for the parameters described above are not limiting in any way. Further, mathematical formulas and the like that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements (eg, TPC, etc.) can be identified by any suitable name, the various names assigned to these various channels and information elements are However, it is not limited.

5) Base station A base station may accommodate one or multiple (eg, three) cells (also referred to as sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being divided into a base station subsystem (eg, an indoor small base station RRH: Remote Radio Head) can also provide communication services. The term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein. A base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell and the like.

6) Mobile station A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, It may also be called mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.

7) Other terms "Connected", "coupled"
The terms “connected”, “coupled”, or any variation thereof, means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements. The coupling or connection between the elements may be physical, logical, or a combination thereof. As used herein, the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, as well as some non-limiting and non-inclusive examples. By using electromagnetic energy, such as electromagnetic energy having wavelengths in the region, the microwave region and the light (both visible and invisible) region can be considered “connected” or “coupled” to each other.

2. "On the basis of the"
As used herein, the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

3. "First", "Second"
Any reference to elements using the designations "first", "second", etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.

4). "Including", "or"
As long as “including” and variations thereof are used herein or in the claims, these terms are intended to be inclusive, as well as the term “comprising”. Furthermore, the term “or” as used herein or in the claims is not intended to be an exclusive OR.

5. Articles Throughout this disclosure, if articles are added by translation, for example, a, an, and the in English, these articles must be clearly indicated by the context , Including multiple items.

Claims (7)

A radiated power measurement system including a base station, a drone, and a drone controller,
The drone
A receiving antenna for receiving radio waves coming from the base station;
Including a power measuring unit for measuring the power of the received radio wave,
The drone control device
A radiated power measurement system including a position and orientation control unit that moves the drone to a predetermined position away from the base station by a predetermined distance and rotates the drone so that the arrival direction of the radio wave corresponds to the direction of the receiving antenna. . The radiated power measurement system according to claim 1,
The drone control device
An interference wave direction estimation unit that estimates the arrival direction of the interference wave based on the power measured by the power measurement unit;
The position and orientation control unit
A radiated power measurement system that rotates the drone so that the estimated arrival direction of the interference wave corresponds to the direction of the receiving antenna. A radiated power measurement system including a base station, a drone, and a drone controller,
The drone
A receiving antenna for receiving radio waves coming from the base station;
A power measuring unit for measuring the power of the received radio wave;
A measurement point storage unit that stores predetermined coordinates that are a predetermined distance away from the base station as measurement points;
Based on the current position coordinates of the drone received from the drone control device and the measurement point, the mobile device is moved to a predetermined position, and the arrival direction of the radio wave from the base station corresponds to the direction of the receiving antenna. Including a position and orientation control unit that rotates the machine
The drone control device
A radiated power measurement system including a drone position transmission unit that transmits the current position coordinates of the drone to the drone. A radiated power measurement system including a base station, a drone, and a drone controller,
The drone
A receiving antenna for receiving radio waves coming from the base station;
A power measuring unit for measuring the power of the received radio wave;
A distance azimuth measuring unit for measuring a distance between the base station and the base station and an azimuth of the base station;
Based on the distance, the azimuth, and the measurement point received from the drone control device, a position and orientation control unit that moves the own device to a predetermined position and rotates the own device in a predetermined direction,
The drone control device
A radiated power measurement system including a measurement point transmitter that transmits a predetermined coordinate that is a predetermined distance away from the base station to the drone as the measurement point. A radiated power measurement system including a base station, a first drone, a second drone, and a drone controller,
The first drone and the second drone are:
A receiving antenna;
A power measuring unit that measures the power of the radio wave received by the receiving antenna;
The drone control device
The first drone is moved to a predetermined position away from the base station by a predetermined distance, and the position of the first drone and the position of the second drone are mutually centered about the position of the base station. The second drone is moved so as to be pointed, the first drone is rotated so that the direction of arrival of the radio wave corresponds to the direction of the receiving antenna, and the second drone is moved to the first drone. A radiated power measurement system that includes a drone pair position and orientation controller that rotates in the same direction as the drone. A radiated power measurement system according to any one of claims 1 to 4,
An anechoic chamber,
Including a plurality of scatterers arranged in the anechoic chamber,
The base station and the drone are radiated power measurement systems arranged in the anechoic chamber. The radiated power measurement system according to claim 5,
An anechoic chamber,
Including a plurality of scatterers arranged in the anechoic chamber,
The base station, the first drone, and the second drone are radiated power measurement systems arranged in the anechoic chamber.

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