JP2023128439A - Communication device, control device, control method, and program for forming beam with high precision and communicating - Google Patents

Abstract

To point a beam in the direction of an opposite device with high precision in a communication device.SOLUTION: A communication device for forming a beam and outputting radio waves sets a first beam and a second beam so that the differences between the received power of radio waves output using the first beam and the received power of radio waves output using the second beam are different according to each direction in which the radio waves are output from the communication device, and controls the direction of a beam directed toward a receiving device, based on the difference value between a first received power of radio waves at the receiving device of the radio waves when the radio waves are output using the first beam, and a second received power of radio waves at the receiving device when the radio waves are output using the second beam.SELECTED DRAWING: Figure 1

Description

The present invention relates to beam control technology in wireless communications.

In mobile communications, wireless communication services are provided to terminal devices located in positions where they can receive radio waves transmitted by base station devices. Therefore, it is important that the radio waves transmitted by the base station device appropriately reach the location of the terminal device. In particular, in recent wireless communication environments that tend to use high frequency bands, wireless quality tends to deteriorate. On the other hand, it is assumed that the base station apparatus forms a beam and improves radio quality by the gain of the beam. Additionally, consideration is being given to using a reflector that reflects radio waves toward areas where wireless quality is low. Note that the direction in which a signal is reflected can be changed by changing the physical direction of a reflector, but it is possible to change the physical direction by using a metasurface reflector (see Non-Patent Document 1). It is possible to reflect radio waves in various directions without having to do so. Similarly, a wireless repeater or the like that can form a beam can also be used. Furthermore, a regenerative relay device may be used that demodulates and decodes the received signal, re-encodes and modulates the decoded data, and regenerates and relays the wireless signal. Note that these reflectors, wireless repeaters, and regenerative repeaters may be collectively referred to as a repeater.

J. He, H. Wymeersch, T. Sanguanpuak, O. Silven, and M. Juntti, "Adaptive Beamforming Design for mmWave RIS-Aided Joint Localization and Communication", 2020 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), 2020 Year

In order for a base station device to communicate with a terminal device with sufficient radio quality, it is important that the beams formed by the base station device itself and the relay device are appropriately directed toward the terminal device.

The present invention provides an adaptive control technique for highly accurately directing a beam in the direction of a partner device in a communication device.

A communication device according to one aspect of the present invention includes an output unit configured to form a beam and output radio waves, and a received power of the radio waves output using a first beam and a received power of the radio waves output using a second beam. a setting means for setting the first beam and the second beam so that a difference between the received power of the radio wave and the received power of the radio wave differs depending on the output direction of the radio wave from the communication device; the first reception power of the radio wave in the radio wave receiving device when the radio wave is output using the second beam; and the second reception power of the radio wave in the receiving device when the radio wave is output using the second beam. and control means for controlling the direction of the beam directed toward the receiving device based on the difference value from the power.

A control device according to one aspect of the present invention is a control device that controls a relay device that relays communication between a base station device and a terminal device staying in a predetermined area, the relay device controlling the base station A first beam and a second beam different from the first beam are formed and output from the radio waves arriving from the device, and the radio waves that are relayed using the first beam are output. the first beam and the second beam so that the difference between the received power and the received power of the radio wave relayed using the second beam is different for each output direction of the radio wave from the relay device. A beam is set, and the control device receives a first received power of the radio wave from the terminal device when the relay device relays the radio wave using the first beam, and a first reception power of the radio wave at the terminal device when the relay device relays the radio wave using the first beam. a receiving means for receiving a report of the second received power of the radio wave at the terminal device when the relay device relays the radio wave using the second beam; It has a transmitting means for transmitting information regarding the first received power and the second received power to the relay device for control by the relay device.

According to the present invention, in a communication device, a beam can be directed toward a partner device with high precision.

1 is a diagram illustrating a configuration example of a wireless communication system. FIG. 2 is a diagram illustrating gain settings for a plurality of beams. It is a diagram showing an example of the hardware configuration of the device. FIG. 3 is a diagram showing an example of a functional configuration of a relay device. FIG. 2 is a diagram illustrating an example of a functional configuration of a base station device. FIG. 2 is a diagram showing an example of a functional configuration of a terminal device. FIG. 3 is a diagram showing a first example of the flow of processing. FIG. 7 is a diagram showing a second example of the flow of processing.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the claimed invention, and not all combinations of features described in the embodiments are essential to the invention. Two or more features among the plurality of features described in the embodiments may be arbitrarily combined. In addition, the same or similar configurations are given the same reference numerals, and duplicate explanations will be omitted.

(Communication system configuration)
FIG. 1 shows a configuration example of a wireless communication system according to this embodiment. The wireless communication system is configured to include, for example, a base station device 101 and a terminal device 102. The base station device 101 and the terminal device 102 perform wireless communication based on, for example, the fifth generation (5G) cellular communication standard, but this is just one example, and other wireless communication standards such as Long Term Evolution (LTE) and future wireless communication standards Communication may be performed according to the communication standard. It is assumed that an obstacle 104 such as a building exists near the base station device 101, for example. In such a situation, the reception power of radio waves transmitted from the base station apparatus 101 in a predetermined area hidden by the obstacle 104 as seen from the base station apparatus 101 decreases significantly, and the terminals staying in the predetermined area Device 102 cannot directly communicate with base station device 101. Therefore, in this embodiment, the relay device 103 is used to allow radio waves from the base station device 101 to reach a predetermined area, and to transmit radio waves from the terminal device 102 staying in the predetermined area to the base station device 101. Let it reach you.

The relay device 103 may be a reflector or a wireless repeater that relays wireless signals without decoding user data. The reflector is a metasurface reflector that is composed of multiple reflective elements, and by adjusting the reflection phase of each reflective element, it is possible to form a reflection pattern in any direction and beam width. configured. Furthermore, the wireless repeater can amplify the received signal (further convert the frequency if necessary) and output the amplified signal. Furthermore, the wireless repeater is configured to be able to form a beam in any direction and beam width using a plurality of antennas. Note that the relay device 103 may be a regenerative relay device that demodulates and decodes user data, re-encodes and modulates the decoded user data, and reproduces a radio signal to relay the data. In this embodiment, the relay device 103 is configured to be able to form a beam 111 and output radio waves arriving from the base station device 101. Note that although FIG. 1 shows an example in which one beam is formed, two or more beams may be formed, or only two beams may be formed.

Here, in order to efficiently perform wireless communication between the base station device 101 and the terminal device 102 using the relay device 103, a beam is formed from the relay device 103 toward the terminal device 102. It is very important to. For this reason, this embodiment provides a technique for estimating the direction in which the terminal device 102 is located as viewed from the relay device 103. Note that, hereinafter, the direction in which radio waves are emitted toward the terminal device 102 in the relay device 103 will be referred to as a radio wave output direction. Further, below, a method of controlling a beam directed toward the terminal device 102 in the relay device 103 will be explained, but when the base station device 101 can directly communicate with the terminal device 102, The following discussion can be used for a communication device that performs communication by forming an arbitrary beam.

In this embodiment, the relay device 103 forms at least two beam patterns and outputs radio waves toward the terminal device 102. At this time, the at least two beam patterns have radio wave outputs such that the difference value between the gain of the first beam and the gain of the second beam is a different value for each direction of output of the radio waves from the relay device 103. Gains for each direction are determined.

For example, as shown in FIG. 2A, beams are formed such that the first beam and the second beam have different gains for each radio wave output direction. When a gain as shown in Fig. 2(A) is used, the first received power when the first beam is used and radio waves are output, and the first received power when the second beam is used and radio waves are output. Based on the difference value from the second received power, the direction in which the terminal device 102 exists when viewed from the relay device 103 can be specified.

For example, the output power of the radio wave in the relay device 103 is P, the gain in the first beam is G1, the gain in the second beam is G2, the gain of the receiving antenna in the terminal device 102 is Gr, and from the relay device 103 to the terminal device 102 Let PL be the propagation loss and N be the noise. Note that all of these are in logarithmic notation. In this case, the first received power P1 of the radio wave at the terminal device 102 when the first beam is used is:
P1=P+G1+Gr+PL+N
The second received power P2 of the radio wave at the terminal device 102 when the second beam is used is expressed as
P2=P+G2+Gr+PL+N
It is expressed as Here, the difference value between the first received power and the second received power is expressed by P1-P2. Here, if the terminal device 102 has not moved significantly, the propagation loss is generally the same when the first beam is used and when the second beam is used, and for example, the output power P is If it is large enough, the effect of noise can be relatively ignored. Therefore, it can be expressed as P1-P2≈G1-G2. That is, the difference value between the first received power and the second received power in the terminal device 102 corresponds to the difference value between the gain of the first beam and the gain of the second beam. Therefore, when the first beam and the second beam having the characteristics as shown in FIG. 2(A) are used, the difference value between the first received power and the second received power is )become that way. When the characteristics shown in FIG. 2B are obtained, only one direction of the terminal device 102 as seen from the relay device 103 corresponds to one difference value, so the first received power and the second By specifying the difference value from the received power, it becomes possible to uniquely specify the direction in which the terminal device 102 exists as seen from the relay device 103.

In this way, the first reception power of the radio wave at the terminal device 102 when the first beam is used in the relay device 103, and the first reception power of the radio wave at the terminal device 102 when the second beam is used in the relay device 103 are determined. Based on the second received power, the direction in which the terminal device 102 exists as seen from the relay device 103 can be specified. In this way, when the direction in which the terminal device 102 is present is specified, the relay device 103 can perform beam direction control so that the peak of the beam is formed in the specified direction. can.

In one example, when a signal notifying information indicating the measurement results of the first received power and the second received power is transmitted from the terminal device 102, the relay device 103 directly transmits the signal to the base station device 101. Forward. Thereafter, the relay device 103 can acquire information for direction control based on the first received power and the second received power measured at the terminal device 102 from the base station device 101. In one example, the information for this direction control may be information indicating the values of the first received power and the second received power themselves. In this case, the relay device 103 calculates and obtains the difference value between the first received power and the second received power. Note that information indicating a difference value between the first received power and the second received power may be acquired as information for direction control. When the relay device 103 obtains the difference value between the first received power and the second received power by calculating the difference value or by the notification from the base station device 101, based on the difference value, as described above, The direction in which the terminal device 102 exists as viewed from the relay device 103 is estimated, and based on the estimation result, beam direction control is performed so as to direct the beam in the direction of the terminal device. Further, the estimation of the direction in which the terminal device 102 exists as seen from the relay device 103 may be performed by a control device provided in the base station device 101 or a control device in a network connected to the base station device 101. . In this case, the control device estimates the direction in which the terminal device 102 exists as seen from the relay device 103 based on the difference value between the first received power and the second received power, and based on the estimation result, Beam control instruction information that instructs the relay device 103 to direct the beam formed by the device 103 toward the terminal device 102 is generated. The control device then transmits the generated control instruction information to the relay device 103 via the base station device 101. When relay device 103 receives this control instruction information, it performs control to direct the beam in the direction of terminal device 102 according to the instruction. In this case, the relay device 103 does not need to calculate the difference value between the first received power and the second received power or estimate the direction in which the terminal device 102 is present.

Note that when the relay device 103 receives the notification of the first received power and the second received power transmitted from the terminal device 102, the relay device 103 demodulates and decodes the notification and converts the first received power and the second received power. 2 received power may be acquired. That is, the relay device 103 acquires the first received power and the second received power notified from the terminal device 103 to the base station device 101 directly from the terminal device 102 instead of acquiring them via the base station device 101. You may obtain it. In this case, the relay device 103 calculates the difference value as described above based on the acquired information, estimates the direction in which the terminal device 102 exists, and directs the beam to the terminal device based on the result of the estimation. Control can be performed so as to point in the direction of 102. Furthermore, when the base station apparatus 101 directly communicates with the terminal apparatus 102 (communicates without going through the relay apparatus 103), the base station apparatus 101 forms at least two beams as described above, and transmits the at least two beams from the terminal apparatus 102 to the terminal apparatus 102. It is possible to receive a notification of the received power of radio waves when using a beam, and estimate the direction in which the terminal device 102 exists as viewed from the base station device 101 based on the difference value of the received power. The base station apparatus 101 can then perform beam direction control so that the beam is directed in the estimated direction. Note that the base station device 101 and the relay device 103 can also use this method when forming a beam toward a device other than a terminal device, such as another relay device. In this case as well, it is possible to send out predetermined radio waves using at least two beams, and direct the beams in the direction of the receiving device by feedback of received power from the receiving device that received the radio waves.

(Device configuration)
An example of the hardware configuration of the base station device 101, the terminal device 102, and the relay device 103 will be described using FIG. 3. In one example, each device is configured to include a processor 301, a ROM 302, a RAM 303, a storage device 304, and a communication circuit 305. The processor 301 is a computer that includes one or more processing circuits such as a general-purpose CPU (central processing unit) or an ASIC (application-specific integrated circuit), and is stored in a ROM 302 or a storage device 304. By reading and executing the program contained in the device, the entire processing of the device and each of the above-mentioned processing are executed. The ROM 302 is a read-only memory that stores information such as programs and various parameters related to processing executed by each device. The RAM 303 is a random access memory that functions as a work space when the processor 301 executes a program and also stores temporary information. The storage device 304 is configured by, for example, a removable external storage device. The communication circuit 305 includes, for example, a circuit for LTE or 5G wireless communication. Note that although one communication circuit 305 is illustrated in FIG. 3, each device may have a plurality of communication circuits. For example, the base station device 101 may include a wired communication circuit for communicating with other nodes, and the relay device 103 may include a wired communication circuit for communicating with a control device.

FIG. 4 is a diagram showing an example of the functional configuration of the relay device 103. The relay device 103 includes, as its functional configuration, a relay processing section 401, a beam forming section 402, a direction control section 403, and a terminal position specifying section 404, for example. Note that these are just examples, and some of the functions may be omitted, integrated with other functional units, or one functional unit may be further divided. These functional units can be realized, for example, by the processor 301 executing programs stored in the ROM 302 or the storage device 304. However, the present invention is not limited to this, and dedicated hardware may be prepared.

The relay processing unit 401 executes a process of relaying a wireless signal (radio wave) transmitted from the base station device 101 or the terminal device 102 (in one example, without decoding user data). For example, when the relay device 103 is a wireless repeater, the relay processing unit 301 amplifies the received radio wave, performs frequency conversion as necessary, and then outputs the signal. Further, when the relay device 103 is a reflection plate, the relay processing unit 301 reflects the arriving radio waves without performing any actual processing. Further, when the relay device 103 is a regenerative relay device, the relay processing unit 301 demodulates and decodes the received signal, encodes and modulates the decoded data again, reproduces the wireless signal, and reproduces the wireless signal. Outputs the regenerated wireless signal to the relay destination.

The beam forming unit 402 forms a beam with at least two beam patterns, as described above. As described above, the beam forming unit 402 separates the first beam from the first beam so that the difference value between the gain of the first beam and the gain of the second beam differs depending on the output direction of the radio waves from the relay device 103. and the second beam.

The direction control unit 403 determines the first received power of the radio wave at the terminal device 102 when the first beam is formed and the radio wave is output, and the terminal device when the second beam is formed and the radio wave is output. Control is performed to form a beam in the direction where the terminal device 102 is located, based on the difference value between the received power of the radio wave and the second received power at the terminal device 102 . The terminal location identifying unit 404 identifies the location of the terminal based on, for example, information acquired from the control device. For example, the terminal position specifying unit 404 receives information from the control device indicating the measured values of the first received power and the second received power of the radio wave at the terminal device 102, and information about the difference value of those received powers (or the value thereof). The direction in which the terminal device 102 exists as viewed from the relay device 103 can be estimated based on that information. Further, the terminal position specifying unit 404 may obtain, for example, information indicating the measurement result of the received power of radio waves at the terminal device 102 by receiving (or intercepting) a report from the terminal device 102. Note that when the control device estimates the position of the terminal device 102 and provides beam control instructions to the relay device 103 based on the estimation, the terminal position specifying unit 404 may be omitted.

FIG. 5 is a diagram showing an example of the functional configuration of the base station device 101. The base station apparatus 101 includes, as its functional configuration, a report receiving section 501, an information notifying section 502, and a terminal direction estimating section 503, for example. Note that these are just examples, and some of the functions may be omitted, integrated with other functional units, or one functional unit may be further divided. These functional units can be realized, for example, by the processor 301 executing programs stored in the ROM 302 or the storage device 304. However, the present invention is not limited to this, and dedicated hardware may be prepared. Further, FIG. 5 only schematically shows functional units related to this embodiment, and the base station device 101 naturally has the function as a base station device in a normal cellular communication system.

The report receiving unit 501 receives from the terminal device 102 a report of the measurement results of the first received power and the second received power of the radio waves output by the relay device 103. Note that the base station device 101 continues to periodically transmit a reference signal using a predetermined radio resource as a normal base station device, and the terminal device 102 measures the reference signal relayed by the relay device 103, for example. The reference signal received power (RSRP) can be reported to the base station device 101. Note that although the received power of radio waves is assumed to be reported here, it is not limited to this, and any index that can identify the received strength of radio waves, such as SNR (signal-to-noise ratio), may be used. good. The information notification unit 502 notifies the relay device 103 of information regarding the first received power and the second received power. Terminal direction estimating section 503 estimates the direction in which terminal device 102 exists as seen from relay device 103 based on the difference value between the first received power and the second received power. Here, the information regarding the first received power and the second received power notified by the information notification unit 502 is information indicating the first received power and the second received power, or a difference value between these received powers. information. Further, the information regarding the first received power and the second received power is determined based on the direction in which the terminal device 102 is located as seen from the relay device 103, which is estimated by the terminal direction estimation unit 503. may include control instruction information specifying the direction in which the beam should be directed. Note that if the relay device 103 can receive a report from the terminal device 102 and autonomously control the beam, the base station device 101 does not have the functions shown in FIG. Good too.

FIG. 6 is a diagram showing an example of the functional configuration of the terminal device 102. As shown in FIG. The terminal device 102 includes, as its functional configuration, a received power measurement section 601 and a received power notification section 602, for example. Note that these are just examples, and some of the functions may be omitted, integrated with other functional units, or one functional unit may be further divided. These functional units can be realized, for example, by the processor 301 executing programs stored in the ROM 302 or the storage device 304. However, the present invention is not limited to this, and dedicated hardware may be prepared. Further, FIG. 6 only schematically shows functional units related to this embodiment, and the terminal device 102 naturally has a function as a terminal device in a normal cellular communication system.

Received power measuring section 601 measures the power of radio waves output from relay device 103. For example, the received power measurement unit 601 measures the reference signal transmitted from the base station device 101 and relayed by the relay device 103, and obtains the reference signal received power (RSRP). Received power notification unit 602 notifies base station device 101 (for example, via relay device 103) of information indicating the received power measured by received power measurement unit 601. Note that the received power notification unit 602 may be configured to notify the relay device 103 of information indicating received power.

(Processing flow)
Next, an example of the flow of processing executed in the wireless communication system will be outlined using FIG. 7. In this process, the relay device 103 converts a radio signal (including a reference signal, for example) arriving from the base station device 101 into a first beam gain and a second beam gain as described above. The first beam and the second beam are set so that the difference value is different for each output direction of the radio waves from the relay device 103, and the set first beam and second beam are formed and output. do. For example, the relay device 103 first forms a first beam and relays the wireless signal arriving from the base station device 101 (S701, S702). The terminal device 102 measures the received power (first received power) of the relayed radio signal (S703), and notifies the base station device 101 of the measurement result via the relay device 103 (S704). Further, the relay device 103 forms a second beam and relays the wireless signal arriving from the base station device 101 (S705, S706). The terminal device 102 measures the received power (second received power) of the relayed radio signal (S707), and notifies the measurement result to the base station device 101 via the relay device 103 (S708). Note that although a case has been described here in which the first beam and the second beam are formed in a time-sharing manner, these beams may be formed in parallel. In this case, for example, different radio signals (for example, reference signals) may be transmitted for each beam, and the terminal device 102 may measure these radio signals in parallel.

Then, the base station device 101 notifies the relay device 103 of the first received power and the second received power included in the received measurement result information or the difference value of these received powers (S709). Then, based on the information, the relay device 103 estimates the direction in which the terminal device 102 exists as seen from the relay device itself (S710), and executes direction control of the beam to be formed so that the beam is directed in that direction. (S711).

Although FIG. 7 describes an example in which the relay device 103 estimates the direction in which the terminal device 102 exists, the control device (base station device 101) may perform the estimation as shown in FIG. . In the case of FIG. 8, the control device estimates the direction in which the terminal device 102 exists when viewed from the relay device 103 from the information on the first received power and the second received power included in the received measurement results. (S801), and determines the direction in which the beam should be directed in the relay device 103 (S802). Then, the control device transmits, via the base station device 101, beam control instruction information that instructs the relay device 103 to direct the beam in the determined direction (S803). The relay device 103 executes beam direction control according to the beam control instruction information (S804).

Note that, until the terminal device 102 enters an area where it cannot directly communicate with the base station device 101, the relay device 103 forms a beam in an initially preset direction and transmits radio waves from the base station device 101. can be configured to output. Note that this beam may be, for example, the first beam or the second beam, or may be a beam with a relatively wide beam width and a low gain so as to broadly cover the dead zone. Good too. The above process may be configured to be executed in response to the terminal device 102 entering the beam area.

As described above, according to the present embodiment, by setting a beam pattern such that the difference in gain between at least two beams is uniquely determined for each radio wave output direction in the relay device 103, the reception of radio waves in the terminal device 102 is improved. Based on the measured power value, it is possible to estimate with high accuracy the direction in which the terminal device 102 exists when viewed from the relay device 103. Then, the relay device 103 sets a beam according to the estimated direction in which the terminal device 102 exists, and performs communication between the base station device 101 and the terminal device 102 with high efficiency using the set beam. It will be possible to relay to Moreover, by applying the above-described method to the base station apparatus 101, it becomes possible to perform beam setting with high precision when the base station apparatus 101 directly communicates with the terminal apparatus 102.

With the above configuration, it is possible to set a beam in an appropriate direction in the communication device. Therefore, it will be possible to contribute to Goal 9 of the Sustainable Development Goals (SDGs) led by the United Nations: ``Build resilient infrastructure, promote sustainable industrialization, and expand innovation.''

The invention is not limited to the above-described embodiments, and various modifications and changes can be made within the scope of the invention.

Claims (15)

A communication device,
output means for forming a beam and outputting radio waves;
The difference between the received power of the radio waves output using the first beam and the received power of the radio waves output using the second beam is different for each output direction of the radio waves from the communication device. a setting means for setting the first beam and the second beam;
The first reception power of the radio wave in the radio wave receiving device when the radio wave is output using the first beam, and the first reception power of the radio wave in the radio wave receiving device when the radio wave is output using the second beam. A control means for controlling the direction of a beam directed toward the receiving device based on a difference value between the radio wave and a second received power;
A communication device comprising: The communication device is a base station device,
The receiving device is a terminal device,
The communication device further includes an acquisition unit that acquires the first received power and the second received power from the terminal device.
The communication device according to claim 1, characterized in that: The communication device is a relay device,
The receiving device is a terminal device,
The terminal device notifies the base station device of the first received power and the second received power via the relay device,
The communication device further includes an acquisition unit that acquires information for the direction control based on the first received power and the second received power from the base station device.
The communication device according to claim 1, characterized in that: The information for the direction control is information indicating the first received power and the second received power, or information indicating the difference value,
The communication device further includes an estimating unit that acquires the difference value based on the information and estimates a direction in which the terminal device exists as seen from the relay device based on the difference value,
The control means performs the direction control so as to direct the beam in the estimated direction of the terminal device.
The communication device according to claim 3, characterized in that: The information for the direction control is a beam control instruction based on the difference value,
The control means performs the direction control of the beam directed in the direction of the terminal device according to the control instruction.
The communication device according to claim 3, characterized in that: 6. The communication device according to claim 3, wherein the relay device is a reflector having a metasurface. 6. The communication device according to claim 3, wherein the relay device is a wireless repeater. A control device that controls a relay device that relays communication between a base station device and a terminal device staying in a predetermined area,
The relay device forms and outputs the radio waves arriving from the base station device into a first beam and a second beam different from the first beam, and here, the relay device outputs the radio waves arriving from the base station device. and the received power of the radio waves relayed using the second beam is different for each output direction of the radio waves from the relay device. 1 beam and the second beam are set,
The control device includes:
The first reception power of the radio wave at the terminal device when the relay device relays the radio wave from the terminal device using the first beam, and the radio wave when the relay device uses the second beam. a second reception power of the radio wave in the terminal device when relaying the second reception power of the radio wave;
transmitting means for transmitting information regarding the first received power and the second received power to the relay device for causing the relay device to control the direction of the beam directed toward the terminal device;
A control device comprising: The information regarding the first received power and the second received power is the first received power and the second received power, or the difference between the first received power and the second received power. indicates the value,
The relay device estimates the direction in which the terminal device exists as seen from the relay device based on the difference value acquired based on the information, and based on the result of the estimation, the base station device and controlling the direction of a beam used for relaying communication between the terminal device and the terminal device.
The control device according to claim 8, characterized in that: The control device includes:
Calculation means for calculating a difference value between the first received power and the second received power;
Estimating means for estimating the direction in which the terminal device exists as seen from the relay device based on the difference value;
determining means for determining the direction of a beam directed from the relay device to the terminal device based on the result of the estimation;
9. The control device according to claim 8, wherein the information regarding the first received power and the second received power is a beam control instruction based on the determination. The control device according to any one of claims 8 to 10, wherein the control device is included in the base station device. A control method executed by a communication device that outputs radio waves by forming a beam,
The difference between the received power of the radio waves output using the first beam and the received power of the radio waves output using the second beam is different for each output direction of the radio waves from the communication device. setting the first beam and the second beam to;
The first reception power of the radio wave in the radio wave receiving device when the radio wave is output using the first beam, and the first reception power of the radio wave in the radio wave receiving device when the radio wave is output using the second beam. controlling the direction of a beam directed toward the receiving device based on a difference value between the radio wave and a second received power;
A control method characterized by comprising: A control method executed by a control device that controls a relay device that relays communication between a base station device and a terminal device staying in a predetermined area,
The relay device forms and outputs the radio waves arriving from the base station device into a first beam and a second beam different from the first beam, and here, the relay device outputs the radio waves arriving from the base station device. and the received power of the radio waves relayed using the second beam is different for each output direction of the radio waves from the relay device. 1 beam and the second beam are set,
The control method includes:
The first reception power of the radio wave at the terminal device when the relay device relays the radio wave from the terminal device using the first beam, and the radio wave when the relay device uses the second beam. receiving a report of the second reception power of the radio wave at the terminal device when the radio wave is relayed;
transmitting information regarding the first received power and the second received power to the relay device for causing the relay device to control the direction of the beam directed toward the terminal device;
A control method characterized by comprising: A program for causing a computer to function as the communication device according to any one of claims 1 to 7. A program for causing a computer to function as the control device according to any one of claims 8 to 11.

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