JP6856372B2 - Radiated power measurement system - Google Patents

Description

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

In recent years, an array antenna system has been studied in which a base station controls radio waves radiated from a plurality of antennas and has directivity so as to have a strong radiant intensity in a specific direction. However, if some trouble occurs in the array antenna and the array antenna does not have the desired directivity, not only the communication quality in the own cell deteriorates, but also the interference with the adjacent cell increases and the communication capacity deteriorates remarkably. 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 radiant power by 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 for measuring the transmission power of the base station 91 will be described with reference to FIG. The OTA measurement system 9 is for fixing the base station 91, the transmitting antenna 92 connected to the base station 91, the receiving antenna 93 installed at a predetermined distance from the base station 91, and the receiving antenna 93. The configuration includes a support column 94 and a power measuring unit 95 for measuring the power of radio waves received by the receiving antenna 93.

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

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

According to the conventional OTA power measurement system 9, when measuring the directivity, the measurement system including the receiving 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 received 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 vertical, horizontal, and height. As a result, it takes a lot of time to install the measurement system, and the productivity is low. Further, when measuring in an anechoic chamber, the position of the radio wave absorber must be adjusted each time in order to move the receiving antenna 93. Further, a support column 94 or the like is required to install the receiving antenna 93, but when measuring a specific radiation surface, the support column or the like affects the radiation performance of radio waves, so that the measurement cannot be performed. Further, when the reflected wave or the like from the support 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 radiant power measurement system that is easy to install and can measure with high accuracy at all points on the radiant surface that are 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 arriving from the base station. The power measuring unit measures the power of the received radio wave.

The drone control device includes a position / attitude control unit. The position / attitude control unit moves the drone to a predetermined position separated from the base station by a predetermined distance, and rotates the drone so that the direction of arrival of radio waves and the direction of the receiving antenna correspond to each other.

According to the radiated power measurement system of the present invention, it is easy to install and high-precision measurement can be performed at all points on the radiated surface that are required.

The block diagram which shows the structure of the conventional OTA measurement system. The block diagram which shows the structure of the radiated power measurement system of Example 1. FIG. A conceptual diagram illustrating the direction of rotation of the drone. The block diagram which shows the structure of the radiated power measurement system of Example 2. The block diagram which shows the structure of the radiated power measurement system of Example 3. The block diagram which shows the structure of the radiated power measurement system of the modification 1. The block diagram which shows the structure of the radiated power measurement system of Example 4. The block diagram which shows the structure of the radiated power measurement system of Example 5. The block diagram which shows the structure of the radiated power measurement system of Example 6. FIG. 3 is a block diagram showing a configuration example of a general-purpose system or computer device that can be used to realize the base station, drone, and drone control device described in the embodiment.

Hereinafter, embodiments of the present invention will be described in detail. The components having the same function are given the same number, and duplicate explanations will be omitted.

Hereinafter, the radiated power measurement system 1 of the first embodiment will be described with reference to FIG. As shown in FIG. 1, the radiated power measurement system 1 of this embodiment includes a base station 91, a transmitting 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 / attitude control unit 121. It is assumed that the drone 11 and the drone control device 12 can communicate with each other via the network 96. A drone is also called an unmanned aerial vehicle (Uninhabited Aerial Vehicle, UAV), and is a general term for aircraft that can fly unmanned by remote control or automatic control. Drones (unmanned aerial vehicles) can be flown by remote control or automatic control among airplanes, rotorcraft, gliders, airships, and other equipment that can be used for aviation and cannot be boarded by humans due to their structure. It is a term that refers to things in general. Drones include aircraft of various sizes and shapes. Many military drones are large aircraft, and commercial drones are small to medium-sized aircraft, with many rotary-wing aircraft (multicopters).

The receiving antenna 93 receives radio waves arriving from the base station 91. The power measuring unit 95 measures the power of the received radio wave. Since the method for measuring electric power is well known, the description thereof will be omitted. The position / orientation control unit 121 moves the drone 11 to a predetermined position (a predetermined position on the radio wave emitting surface equal distance from the base station 91) separated from the base station 91 by a predetermined distance, and moves the drone 11 to the radio wave arrival direction and the receiving antenna. The drone 11 is rotated so that the directions of the 93 correspond to each other (so that the direction in which the reception power of the receiving antenna 93 is maximized matches the direction in which the radio wave arrives). Alternatively, the receiving antenna 93 is rotated so that the direction of arrival of the radio wave corresponds to the direction of arrival of the radio wave.

The rotation of the drone 11 executed by the position / attitude control unit 121 will be described with reference to FIG. As shown in FIG. 3, the position / attitude 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, which is orthogonal to the x-axis direction, and the direction from the left side to the right side of the drone 11 or the direction from the right side to the left side is the y-axis. The direction is orthogonal to both the x-axis and the y-axis, and the direction from the lower part to the upper part of the drone 11 or the direction from the upper part to the lower part is 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 expressed as θ. The rotation with the y-axis as the rotation axis is called pitching, and the pitching angle is expressed as φ.

The position / attitude control unit 121 yaws and pitches the drone 11 to match the direction in which the receiving power of the receiving antenna 93 is maximized with the direction in which the radio wave arrives.

As described above, according to the radiated power measurement system 1 of the present embodiment, it becomes 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 significantly reduced. Further, since the radiant power at a predetermined position on the radio wave radiation surface of the base station 91 is measured by the drone 11 that can move in the vertical and horizontal height directions, the measurement can be easily performed in a short time without moving the support column. Further, since the receiving antenna 93 is mounted on the drone 11, the support column and the like are not required, and not only the measurement points that could not be measured in the past can be measured, but also the deterioration of the measurement accuracy due to the reflected wave on the support column and the like is avoided. can do.

If there is an interference wave from the outside, and the interference wave (for example, the radiant power from another base station using the same band in the adjacent cell) is received by the receiving antenna 93, the base to be measured originally The radiant power from the station 91 cannot be measured accurately. In the second embodiment, a radiated power measurement system that solves the above problems will be disclosed.

Hereinafter, the radiated power measurement system 2 of 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 transmitting antenna 92 connected to the base station 91, a drone 11, and a drone control device 22, and the drone control device 22. The configuration requirements other than the above are the same as those in the first embodiment. The drone control device 22 includes a position / attitude 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 with each other 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 (a predetermined position on the radio wave emitting surface equal distance from the base station 91) separated from the base station 91 by a predetermined distance, and the estimated interference wave arrives. The drone 11 is rotated so that the directions correspond to the directions of the receiving antenna 93 (so that the direction in which the receiving power of the receiving antenna 93 is maximized matches the direction in which the interference wave arrives). In this state, the power of the radio wave received by the receiving antenna 93 is measured by the power measuring unit 95, so that the interference wave 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 a certain value or less, it is determined to be an interference wave. Alternatively, a wave arriving from an arriving direction other than the wave having the largest measured power, such as by rotating the drone 11, may be determined to be an interference wave.

After that, the position / attitude control unit 221 executes the same operation as in the first embodiment. That is, so that the direction of arrival of the radio wave from the base station 91 and the direction of the receiving antenna 93 correspond to each other (the direction in which the reception power of the receiving antenna 93 is maximized and the direction of arrival of the radio wave from the base station 91 match. ) Rotate the drone 11.

As described above, according to the radiant power measurement system 2 of the present embodiment, the desired power can be accurately measured by considering the interference wave power in addition to the effect of the first embodiment.

Hereinafter, the radiated power measurement system 3 of the third embodiment will be described with reference to FIG. As shown in FIG. 5, the radiated power measurement system 3 of this embodiment includes a base station 91, a transmitting antenna 92 connected to the base station 91, a drone 31, and a drone control device 32, and includes the drone 31 and the drone. The configuration requirements other than the control device 32 are the same as those in the first and second embodiments. The drone 31 includes a receiving antenna 93, a power measuring unit 95, a measuring point storage unit 311 and a position / attitude control unit 312. The receiving antenna 93 and the power measuring unit 95 are the same as those 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 with each other via the network 96.

The measurement point storage unit 311 of the drone 31 stores in advance predetermined coordinates separated from the base station 91 by a predetermined distance as measurement points. The measurement point storage unit 311 of the drone 31 may also 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.

The position / orientation control unit 312 of the drone 31 positions its own machine at a predetermined position (base station 91) 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. It moves to (on the radiation surface at the same distance from) and rotates its own unit so that the direction of arrival of the radio wave from the base station 91 and the direction of the receiving antenna 93 correspond to each other. When the position information of the base station 91 is stored in the measurement point storage unit 311, the position / attitude control unit 312 is in the direction in which the reception power of the receiving antenna 93 is maximized in the direction toward the position of the base station 91 designated in advance. You may rotate your own machine so that it faces. Further, the position / orientation control unit 312 measures the direction of the base station 91 from the position information of the base station 91 and the position information of the drone, and matches the direction 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 as you like.

The drone position transmission unit 321 will be described. For example, for outdoor position information, a satellite navigation system such as car navigation can be utilized. Further, the drone position transmission unit 321 obtains the position information of the measurement point on the radial 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. You may. In this case, the measurement point storage unit 311 is unnecessary.

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

[Modification 1]
Hereinafter, the radiated power measurement system 3A of the first modification, which is a modification of the third embodiment, will be described with reference to FIG. As shown in FIG. 6, the radiation power measurement system 3A of this modified example 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. Implementation of configuration requirements other than the drone control device 32A, the first reference signal transmitter 33-1 and the second reference signal transmitter 33-2, including the device 33-1 and the second reference signal transmitter 33-2. This is the same as in Example 3. The drone control device 32A includes a drone position transmission unit 321A.

In the figure, two reference signal transmitters are shown, but the number may be any number as long as there are a plurality of reference signal transmitters. 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 wave.

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

Hereinafter, the radiated power measurement system 4 of the fourth embodiment will be described with reference to FIG. 7. As shown in FIG. 7, the radiated power measurement system 4 of this embodiment includes a base station 91, a transmitting antenna 92 connected to the base station 91, a drone 41, and a drone control device 42, and includes a drone 41 and a drone. The configuration requirements 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 measuring unit 95, a distance / direction measuring unit 411, and a position / attitude control unit 412. The receiving antenna 93 and the power measuring unit 95 are the same as those 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 with each other via the network 96.

The distance / directional measurement unit 411 measures the distance between the own machine and the base station 91 and the direction of the base station 91 (the direction from the drone 41 in anticipation of the base station 42).

The measurement point transmission unit 421 of the drone control device 42 transmits to the drone 41 using predetermined coordinates separated from the base station 91 by a predetermined distance as a measurement point.

The position / attitude control unit 412 moves its own machine 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 machine 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, the distance measuring technique used in a camera or the like can be applied. The measurement principle is a triangular distance measurement method that converts the image formation position of the light receiving element due to a change in distance into a distance, and a time of measurement that measures the time from the irradiation of light to the reception of light and converts the time difference into a distance.・ There is a flight type. Since these measurement principles are known, detailed description will not be given.

The directional measurement of the distance directional measurement unit 411 will be described. In the direction measurement of the distance direction measurement unit 411, for example, the drone 41 is rotated from the initial state with the state directed to a specific direction as the initial state, and the rotation angle of the drone 41 that maximizes the input power is used to determine the base station 91. Measure the orientation. The specific direction may be used with reference to the direction measured by a compass or the like. For example, the distance / orientation measuring unit 411 may measure the orientation of the base station 91 by designating the reference direction and measuring the angle in the horizontal plane and the angle in the vertical plane.

As described above, according to the radiant power measurement system 4 of the present embodiment, the drone 41 measures the distance between the own machine and the base station 91 and the direction of the base station 91, and controls the movement and rotation of the own machine. Therefore, the same effect as that of Example 1 is obtained.

When the interference wave arrives from the same direction as the radio wave from the base station 91 or from a direction close to the radio wave, it may be difficult to separate the influence of the interference wave from the measured power. Example 5 discloses a radiated power measurement system that solves the above problems.

Hereinafter, the radiated power measurement system 5 of the fifth embodiment will be described with reference to FIG. As shown in FIG. 8, the radiated power measurement system 5 of this embodiment includes a base station 91, a transmitting antenna 92 connected to the base station 91, a first drone 51-1 and a second drone 51-. 2. The configuration requirements other than the first drone 51-1, the second drone 51-2, and the drone control device 52, including 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 the same receiving antenna 93 as in Examples 1 to 4 and the power measuring unit 95. 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 / attitude control unit 312 disclosed in the third embodiment, or the fourth embodiment. The distance / direction measuring unit 411 and the position / attitude control unit 412 may be included. The number of drones is not limited to the two shown in the figure, and may be any number as long as there are a plurality of drones. The drone control device 52 includes a drone pair position / attitude control unit 521 and an interference wave power subtraction unit 522. It is assumed that the first drone 51-1, the second drone 51-2, and the drone control device 52 can communicate with each other via the network 96.

The drone pair position / orientation control unit 521 moves the first drone 51-1 to a predetermined position separated 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. a second drone 51-2 moves the position and the position of the second drone 51-2 are formed so that point-symmetric with the first arrived at the base station 91 or we first drone 51-1 orientation of arrival direction and the reception antenna 93 of the received radio waves by the receiving antenna 93 of the drone 51-1 rotates the first drone 51-1 so as to correspond to the second drone 51-2 first Rotates in the same direction as the drone 51-1.

The interference wave power subtraction unit 522 obtains the interference wave power in the first drone 51-1 by 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 the interference wave can be reduced.

The reduction of the influence of the interference wave will be described. For example, when measuring the radiated power of the base station 91 only with the first drone 51-1 and there is an interference wave coming from the same direction as the base station 91, it is impossible to distinguish between the interference wave and 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 the point-symmetrical position of the first drone 51-1, and the receiving antenna 93 of the second drone 51-2 is arranged. By pointing in the same direction as the receiving antenna 93 of the first drone 51-1, the interference wave power (of the interference wave arriving 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 located point-symmetrically with respect to the base station 91, the distance between the first drone 51-1 and the second drone 51-2 is known. Is. From the received 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 can be known. By subtracting from the measured power of the first drone 51-1, the power of the desired wave can be accurately measured.

As described above, according to the radiant power measurement system 5 of the present embodiment, in addition to the effects of the first to fourth embodiments, even when the arrival directions of the interference wave and the desired wave are the same or similar to each other. The power of the desired wave can be measured accurately.

Hereinafter, the radiated power measurement system 6 of the sixth embodiment in which the measurement system is arranged in the anechoic chamber will be described with reference to FIG. As shown in FIG. 9, the radiant power measurement system 6 of this embodiment includes an anechoic chamber 63 and a plurality of scatterers 64-1, 64-2, ..., 64-N arranged in the anechoic chamber 63. Base station 91, transmission antenna 92 connected to base station 91, drone 11 (may be drone 31, drone 41, or first drone 51-1, second drone 51-2), and drone control. A device 12 (may be a drone control device 22, a drone control device 32, a drone control device 32A, a drone control device 42, a drone control device 52), an anechoic chamber 63, scatterers 64-1, 64-2, ... The configuration requirements other than 64-N are the same as those in Examples 1 to 5. At this time, at least the base station 91 and the drone 11 are assumed to be arranged in the anechoic chamber 63. It is assumed 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, measurements are taken in a so-called dynamic fading environment.

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

As described above, according to the radiant 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. As a result, the working time required for measurement can be significantly reduced.

<Hardware configuration>
The block diagram used in the explanation of the above embodiment (Example) shows a block of functional units. 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 physically and / or logically coupled device, or directly and / or indirectly by two or more physically and / or logically separated devices. (For example, wired and / or wireless) may be connected and realized by these plurality of devices.

For example, the base station, drone, drone control device, and the like in one embodiment of the present invention may function as a computer that performs the method of the present invention. FIG. 10 is a diagram showing an example of a hardware configuration of a base station, a drone, and a drone control device according to an embodiment of the present invention. The above-mentioned base station, drone, and drone control device 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 word "device" 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 more of the devices shown in the figure, or may be configured not to include some of the devices.

For each function in the base station, drone, and drone control device, the processor 11000 performs calculations by loading predetermined software (program) on hardware such as the processor 11000 and the memory 12000, and communication by the communication device 14000 and communication by the communication device 14000 and the like. It is realized by controlling the reading and / or writing of data in the memory 12000 and the storage 13000.

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

Further, the processor 11000 reads a program (program code), a software module, and data from the storage 13000 and / or the communication device 14000 into 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-described embodiment is used. For example, position / orientation control unit 121, position / attitude control unit 221, interference wave direction estimation unit 222, measurement point storage unit 311, position / orientation control unit 312, drone position transmission unit 321 and drone position transmission unit 321A, distance / orientation measurement unit 411. The position / orientation control unit 412, the measurement point transmission unit 421, the drone pair position / attitude control unit 521, the interference wave power subtraction unit 522, and the like may be stored in the memory 12000 and realized by a control program that operates on the processor 11000. Other functional blocks may be realized in the same manner. Although it has been described that the various processes described above are executed by one processor 11000, they may be executed simultaneously or sequentially by two or more processors 11000. Processor 11000 may be mounted on one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 12000 is a computer-readable recording medium, and is composed of at least one such as ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and RAM (Random Access Memory). May be done. The memory 12000 may be called a register, a cache, a main memory (main storage device), or the like. The memory 12000 can store a program (program code), a software module, or the like that can be executed to carry out the drone control method according to the embodiment of the present invention.

The storage 13000 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, 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, server or other suitable medium containing memory 12000 and / or storage 13000.

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, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmission / reception antenna, transmission / reception unit, and the like included in the above-mentioned 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, etc.) that receives an input from the outside. The output device 16000 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 15000 and the output device 16000 may have an integrated configuration (for example, a touch panel).

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

In addition, 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. It may be configured to include hardware, and the hardware may realize a part or all of each functional block. For example, the processor 11000 may be implemented on at least one of these hardware.

<Information notification, signaling>
Notification of information is not limited to the embodiments / embodiments described herein, 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, etc. It may be carried out by notification information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. RRC signaling may also be referred to as an RRC message, such as an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

<Applicable system>
Each aspect / embodiment described in the present specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered Trademarks), GSM (Registered Trademarks), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (Registered Trademarks), It may be applied to other systems that utilize suitable systems and / or next-generation systems that are extended based on them.

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

<Operation of base station>
In some cases, the specific operation performed by the base station in the present specification may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with a terminal are performed on the base station and / or other network nodes other than the base station (for example,). It is clear that it can be done by (but not limited to) MME or S-GW. Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

<Direction of input / output>
Information, etc. (* Refer to the item "Information, signal") 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.>
The input / output information and the like may be stored in a specific location (for example, memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

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

<Variations of modes, etc.>
Each aspect / embodiment described in the present specification may be used alone, in combination, or switched with execution. In addition, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is implicitly (for example, without notifying the predetermined information). May be good.

Although the present invention has been described in detail above, it is clear 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 modifications and modifications without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description of the present specification is for the purpose of exemplification and does not have any limiting meaning to the present invention.

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

Further, software, instructions, and the like may be transmitted and received via a transmission medium. For example, the software uses 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 to websites, servers, or other When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.

2) Information, Signals The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, 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. It may be represented by a combination of.

The terms described herein and / or the terms necessary for understanding the present specification may be replaced with terms having the same or similar meanings. For example, the channel and / or symbol may be a signal. Also, the signal may be a message. Further, the component carrier (CC) may be referred to as a carrier frequency, a cell, or the like.

3) "System", "Network"
The terms "system" and "network" as used herein are used interchangeably.

4) Parameter, channel name Further, the information, parameter, etc. described in the present specification may be represented by an absolute value, a relative value from a predetermined value, or another corresponding value. It may be represented by information. For example, the radio resource may be indexed.

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

5) Base station A base station can accommodate one or more (eg, three) cells (also called 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 a base station subsystem (eg, a small indoor base station RRH: Remote). Communication services can also be provided by Radio Head). The term "cell" or "sector" refers to a part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. In addition, the terms "base station,""eNB,""cell," and "sector" may be used interchangeably herein. Base stations are sometimes referred to by terms such as fixed station, NodeB, eNodeB (eNB), access point, femtocell, and small cell.

6) Mobile stations Mobile stations are subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, etc. It may also be referred to as a mobile device, wireless device, remote device, handset, user agent, mobile client, client, or some other suitable term.

7) Other terms 1. "Connected", "combined"
The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. As used herein, the two elements are by using one or more wires, cables and / or printed electrical connections, and, as some non-limiting and non-comprehensive examples, radio frequencies. By using electromagnetic energies such as electromagnetic energies with wavelengths in the region, microwave region and light (both visible and invisible) regions, they can be considered to be "connected" or "coupled" to each other.

2. "On the basis of"
The phrase "based on" as used herein does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

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

4. "Including", "or"
As long as "including" and their variations are used herein or in the claims, these terms are intended to be as inclusive as the term "provides". Moreover, the term "or" as used herein or in the claims is intended not 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 not indicated by the context. , Shall include more than one.

Claims (1)

A radiated power measurement system that includes a base station, a first drone, a second drone, and a drone controller.
The first drone and the second drone are
With the receiving antenna
Includes a power measuring unit that measures the power of radio waves received by the receiving antenna.
The drone control device is
The first drone is moved to a predetermined position separated from the base station by a predetermined distance, and the position of the first drone and the position of the second drone are aligned with each other with the position of the base station as the center of symmetry. The second drone is moved so as to be point-symmetrical, the direction of arrival of the radio wave that arrives at the first drone from the base station and is received by the receiving antenna of the first drone, and the direction of arrival of the receiving antenna. A radiated power measurement system including a drone pair position / orientation control unit that rotates the first drone so that the directions correspond to each other and rotates the second drone in the same direction as the first drone.

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