Power reception device and power reception method

Abstract

This power reception device comprises: a reception unit that receives a first power transmission signal and a second power transmission signal which have been transmitted by a first power transmission device and a second power transmission device, respectively, using a prescribed multiplex transmission scheme; and a charging unit that uses the first power transmission signal and the second power transmission signal to perform charging.

Description

Power receiving device and power receiving method

[0001] The present disclosure relates to a power receiving device and a power receiving method.

[0002] For example, Patent Document 1 discloses a wireless power transmission device having a power transmission antenna that emits radio waves toward a power receiving unit having a directional power receiving antenna that receives power transmitted by radio waves between the ocean and land, as shown in Figure 27, and a drive unit that directs the power transmission antenna in the direction of the power receiving unit having the power transmission antenna.

[0003] Patent No. 6388728

[0004] However, in consideration of the radio wave propagation environment, it is desirable to provide a highly flexible wireless power transmitting device and power receiving device that can perform highly efficient charging in various radio wave propagation environments.

[0005] Non-limiting examples of the present disclosure contribute to providing a technology for a wireless power transmission system that enables highly efficient charging.

[0006] A power receiving device according to one embodiment of the present disclosure includes a receiving unit that receives a first power transmission signal and a second power transmission signal transmitted by a first power transmission device and a second power transmission device, respectively, using a predetermined multiplex transmission method, and a charging unit that performs charging using the first power transmission signal and the second power transmission signal.

[0007] In a power receiving method according to one aspect of the present disclosure, a power receiving device receives a first power transmission signal and a second power transmission signal transmitted by a first power transmission device and a second power transmission device, respectively, using a predetermined multiplex transmission method, and performs charging using the first power transmission signal and the second power transmission signal.

[0008] These comprehensive or specific aspects may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0009] According to non-limiting examples of the present disclosure, it is possible to provide a wireless power transmission system capable of highly efficient charging.

[0010] Further advantages and benefits of certain aspects of the present disclosure will become apparent from the specification and drawings. Such advantages and / or benefits may be provided by some of the embodiments and features described in the specification and drawings, respectively, but not necessarily all of them may be provided to obtain one or more identical features.

[0011] 1B is a diagram showing an example of the configuration of the device for power transmission and communication in embodiment 1. FIG. 1C is a diagram showing an example of the configuration of the device for power transmission and communication in embodiment 1 that is different from FIG. 1A. FIG. 1A is a diagram showing an example of the configuration of the power transmission antenna in FIG. 1A and FIG. 1B. FIG. 1C is a diagram showing an example of the configuration of the power transmission antenna in FIG. 1A and FIG. 1B. FIG. 1C is a diagram showing an example of the configuration of an example of the part composed of the power transmission unit and the power transmission antenna in FIG. 1A. FIG. 1B is a diagram showing an example of the configuration of the device for power transmission and communication in embodiment 1. FIG. 1E is a diagram showing an example of the configuration of the device for power transmission and communication in embodiment 1. FIG. 1G is a diagram showing an example of the configuration of the device for power transmission and communication in embodiment 1 that is different from FIG. 2A. 2A and 2B. FIG. 2C shows an example of the configuration of the power receiving antenna in FIG. 2A and 2B. FIG. 2C shows an example of the configuration of the power receiving antenna in FIG. 2A and 2B. FIG. 2E shows an example of the configuration of the device that receives a signal for power transmission transmitted by the device for power transmission and communication and charges a battery. FIG. 2F shows an example of the configuration of the device that receives a signal for power transmission transmitted by the device for power transmission and communication and charges a battery. 2A and 2B, the charging and receiving unit of FIG. 2E and FIG. 2F, and the charging and communication processing unit of FIG. 2G and FIG. 2H. The figures show examples of the configuration of the charging-related operation unit provided in the charging unit of FIG. 2A and FIG. 2B, the charging and receiving unit of FIG. 2E and FIG. 2F, and the charging and communication processing unit of FIG. 2G and FIG. 2H. The figures show examples of the configuration of the charging and receiving unit of FIG. 2E and FIG. 2F. The figures show examples of the configuration of the charging and communication processing unit of FIG. 2G and FIG. 2H.Figure showing an example of the configuration of the "charging and communication processing unit" in FIG. 2H Figure showing an example of the relationship between a base station and a terminal Figure showing an example of a terminal equipped with a charging function unit Figure showing an example of a terminal equipped with a communication function unit Figure showing another example of the relationship between a base station and a terminal Figure showing an example of a base station equipped with a power transmission function unit Figure showing an example of a base station equipped with a communication function unit Figure showing an example of the modes of a terminal Figure showing an example of the configuration of the modulation signal transmitted by base station #1 in FIG. 3A on the time-frequency axis when base station #1 is only performing communication Figure showing an example of the configuration of the signal transmitted by base station #1 in FIG. 3A in time-frequency when base station #1 is only performing wireless power transmission Figure showing an example of the configuration of the modulation signal and signal transmitted by base station #1 in FIG. 3A in time-frequency when base station #1 is performing communication and wireless power transmission Figure showing an example of a modulation signal for communication Figure showing an example of the configuration related to the antenna in the configuration of base station #1 Figure showing an example different from FIG. 7A of the configuration related to the antenna in the configuration of base station #1 Figure showing an example different from FIGS. 7A and 7B of the configuration related to the antenna in the configuration of base station #1 Figure showing an example of the configuration of the reference signal in FIG. 6 included in the communication modulation signal in FIG. 5C when base station #1 uses the antenna as shown in FIG. 7A Figure showing an example of the configuration of the reference signal in FIG. 6 included in the communication modulation signal in FIG. 5C when base station #1 uses the antenna as shown in FIG. 7B Figure showing an example of the configuration of the reference signal in FIG. 6 included in the communication modulation signal in FIG. 5C when base station #1 uses the antenna as shown in FIG. 7C Figure showing an example of the configuration related to the antenna in base station #2 Figure showing an example of the configuration related to the antenna in base station #2 Figure showing an example of the configuration related to the antenna Figure showing an example different from FIG. 9B1 of the configuration related to the antenna Figure showing an example of the configuration of the control information symbol in FIG. 6 included in the communication modulation signal in FIG. 5C when base station #1 uses the antenna as shown in FIG. 7A Figure showing a first example of the interaction between a terminal and a base station Figure showing a second example of the interaction between a terminal and a base station Figure showing an example of the relationship between a base station and a terminal Figure showing an example of the configuration of terminal #2 in FIG. 12A Figure showing an example different from FIG. 12B of the configuration of terminal #2 in FIG. 12A Figure showing an example different from FIGS. 12B and 12C of the configuration of terminal #2 in FIG. 12A Figure showing the time of the wireless power transmission signal transmitted by base station #1 in FIG. 12A,Diagram showing an arrangement example in terms of frequency. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #1 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #1 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #1 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #1 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #1 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #1 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #1 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signal transmitted by base station #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signals transmitted by base stations #1 and #2 in FIG. 12A. Diagram showing an arrangement example in terms of time and frequency of the wireless power transmission signals transmitted by base stations #1 and #2 in FIG. 12A. Diagram showing an example of the configuration of the base station capability information transmitted by the base station to the terminal in FIGS. 3A, 3C, and 12A. Diagram showing an example of the configuration of the base station capability information transmitted by the base station to the terminal in FIGS. 3A, 3C, and 12A. Diagram showing an example of the configuration of the terminal capability information transmitted by the terminal to the base station in FIGS. 3A, 3C, and 12A. Diagram showing an example of the configuration of the terminal capability information transmitted by the terminal to the base station in FIGS. 3A, 3C, and 12A. Diagram where the base station performs "phase adjustment,Diagram showing an example of the interaction between a base station and a terminal when performing "beam adjustment" Diagram showing an example of the relationship between a base station and a terminal Diagram showing an example of the interaction between a base station (or TRP) and a terminal Diagram showing an example different from FIG. 18A of the interaction between a base station (or TRP) and a terminal Diagram showing an example of the interaction between a base station (or TRP) and a terminal Diagram showing an example different from FIG. 19A of the interaction between a base station (or TRP) and a terminal Diagram showing an example of the frequency (band) used for communication between a base station and a terminal and the frequency (band) used by the base station for wireless power transmission to the terminal Diagram showing an example of the interaction between a base station and a terminal when the base station performs transmission beamforming Diagram showing an example different from FIG. 20B of the interaction between a base station and a terminal when the base station performs transmission beamforming Diagram showing an example of the interaction between a base station and a terminal when the base station performs transmission beamforming and the terminal performs reception beamforming Diagram showing an example different from FIG. 20D of the interaction between a base station and a terminal when the base station performs transmission beamforming and the terminal performs reception beamforming Diagram showing the first example of the relationship between a base station (or TRP) and a terminal Diagram showing the second example of the relationship between a base station (or TRP) and a terminal Diagram showing the third example of the relationship between a base station (or TRP) and a terminal Diagram showing an example of the interaction between base station #1, base station #2, and terminal #2 in the state as shown in FIG. 21B Diagram showing an example different from FIG. 22A of the interaction between base station #1, base station #2, and terminal #2 in the state as shown in FIG. 21B Diagram showing an example of the interaction between base station #1, base station #2, base station #3, and terminal #2 in the state as shown in FIG. 21C Diagram showing an example of the interaction between base station #1, base station #2, base station #3, and terminal #2 in the state as shown in FIG. 21C Diagram showing an example different from FIG. 23A1 of the interaction between base station #1, base station #2, base station #3, and terminal #2 in the state as shown in FIG. 21C Diagram showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by the base station when the base station performs wireless power transmission and communication Diagram showing an example of the time and frequency arrangement of the modulation signal for communication transmitted by the base station when the base station performs wireless power transmission and communication Diagram showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by the base station when the base station performs wireless power transmission and communication Diagram showing an example of the time and frequency arrangement of the modulation signal for communication transmitted by the base station when the base station performs wireless power transmission and communication Diagram showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by the base station when the base station performs wireless power transmission and communication, and when the base station performsFIG. 1 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by a base station. FIG. 2 shows an example of the time and frequency arrangement of communication modulated signals transmitted by a base station when the base station performs wireless power transmission and communication. FIG. 3 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by a base station when the base station performs wireless power transmission and communication. FIG. 4 shows an example of the time and frequency arrangement of communication modulated signals transmitted by a base station when the base station performs wireless power transmission and communication. FIG. 5 shows an example of the time and frequency arrangement of communication modulated signals transmitted by a base station when the base station performs wireless power transmission and communication. , a diagram showing an example of arrangement in frequency. Fig. 1 shows an example of arrangement in time and frequency of a communication modulated signal transmitted by a base station when a base station performs wireless power transmission and communication. Fig. 2 shows an example of arrangement in time and frequency of a communication modulated signal transmitted by a base station when a base station performs wireless power transmission and communication. Fig. 3 shows an example of arrangement in time and frequency of a communication modulated signal transmitted by a base station when a base station performs wireless power transmission and communication. Fig. 4 shows an example of arrangement in time and frequency of a wireless power transmission signal transmitted by a base station when a base station performs wireless power transmission and communication. A diagram showing an example of the time and frequency arrangement of modulated signals for communication transmitted by a base station when performing line power transmission and communication. A diagram showing an example of the time and frequency arrangement of modulated signals for communication transmitted by a base station when performing wireless power transmission and communication. A diagram showing an example of the time and frequency arrangement of modulated signals for communication transmitted by a base station when performing wireless power transmission and communication. A diagram showing an example of the time and frequency arrangement of modulated signals for communication transmitted by a base station when performing wireless power transmission and communication. A diagram showing an example of the time and frequency arrangement of modulated signals for communication transmitted by a base station when performing wireless power transmission and communication. 25A is a diagram showing an example of the arrangement of wireless power transmission signals and communication modulated signals in time and frequency when the base station transmits the signal. FIG. 25A is a diagram showing an example of the relationship between the base station (or TRP) and the terminal. FIG. 25A is a diagram showing an example of the arrangement of wireless power transmission signals in time and frequency axes when the base station transmits the signal. FIG. 25A is a diagram showing an example of the arrangement of wireless power transmission signals in time and frequency axes when the base station transmits the signal.A diagram showing an example of the configuration on the frequency axis. A diagram showing an example of the configuration on the time and frequency axes of the wireless power transmission signal transmitted by base station #1 in Figure 25A. A diagram showing an example of the configuration on the time and frequency axes of the wireless power transmission signal transmitted by base station #2 in Figure 25A. A diagram showing an example of the configuration on the time and frequency axes of the wireless power transmission signal transmitted by base station #1 in Figure 25A. A diagram showing an example of the configuration on the time and frequency axes of the wireless power transmission signal transmitted by base station #2 in Figure 25A. A diagram showing an example of communication between a base station and a terminal. A diagram showing an example different from Figure 26A of communication between a base station and a terminal. A diagram showing an example of a wireless power transmission system according to prior art.

[0012] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0013] First Embodiment In the first embodiment, a system and device for wireless power transmission will be described.

[0014] 1A shows an example of the configuration of a "power transmission and communication device" in this embodiment, such as a base station, an access point, etc. The "power transmission and communication device" may be an example of a wireless device, a wireless power transmission device, a power transmission device, a communication device, etc.

[0015] The control unit 199A outputs a control signal 198A including control information for communication and control information for power transmission.

[0016] The power transmitting unit 101A receives received data 125A and a control signal 198A as input, and when the control signal 198A instructs the execution of power transmission, outputs transmission signals 102A_1, ..., 102A_i, ..., 102A_M for power transmission, where M is an integer equal to or greater than 1 or 2, and i is an integer equal to or greater than 1 and equal to or less than M.

[0017] A transmission signal 102A_1 for power transmission is output as a radio wave from a power transmission antenna 1 of 103A_1. A transmission signal 102A_i for power transmission is output as a radio wave from a power transmission antenna i of 103A_i. A transmission signal 102A_M for power transmission is output as a radio wave from a power transmission antenna M of 103A_M.

[0018] The communication processing unit 124A receives transmission data 126A and a control signal 198A as input, and when the control signal 198A indicates that communication should be carried out, performs processing such as error correction coding and modulation on the transmission data 126A, and outputs a transmission signal 123A, which is output as radio waves from the communication antenna 121A.

[0019] The communication processing unit 124A receives the received signal 122A received by the communication antenna 121A and the control signal 198A as input, and performs processes such as demodulation and error correction decoding on the received signal 122A based on the control signal 198A, and outputs received data 125A.

[0020] 1A may have a configuration in which a processing unit not shown in FIG. 1A is added. Furthermore, the communication antenna 121A and communication processing unit 124A in FIG. 1A (and FIG. 1B) may perform transmission and / or reception corresponding to MIMO (Multiple Input Multiple Output) transmission, in which multiple modulated signals (multiple streams) are transmitted using multiple antennas. Therefore, the communication antenna 121A may be one or more antennas, or two or more antennas. Furthermore, the transmission signal 123A may be composed of multiple signals. And the reception signal 122A may be composed of multiple signals.

[0021] The configuration of the power transmitting antenna i of 103A_i will be described in detail later.

[0022] In addition, as shown in FIG. 1A , by separating an RF (Radio Frequency) circuit (analog circuit) including a power amplifier for power transmission from an RF circuit (analog circuit) including a power amplifier for communication, it is possible to obtain the effect of easily providing RF circuits suitable for the purposes of power transmission and communication.

[0023] Fig. 1B shows a configuration example of a "power transmission and communication device" according to the present embodiment, which is different from that shown in Fig. 1A, such as a base station, an access point, etc. In Fig. 1B, components that operate in the same manner as those in Fig. 1A are given the same numbers, and some of the descriptions will be omitted.

[0024] A characteristic feature of Figure 1B is that the power transmitting unit 101A outputs antenna control signals 104B_1 to control the power transmitting antenna 1 of 103A_1, ..., antenna control signals 104B_i to control the power transmitting antenna i of 103A_i, ..., antenna control signals 104B_M to control the power transmitting antenna i of 103A_M.

[0025] The configuration and operation of the power transmitting antenna i 103A_i will be described in detail later.

[0026] In addition, as shown in FIG. 1B , by separating an RF circuit (analog circuit) including a power amplifier for power transmission from an RF circuit (analog circuit) including a power amplifier for communication, it is possible to obtain the effect of easily providing RF circuits suited to the applications of power transmission and communication.

[0027] 1A and 1B , i is an integer between 1 and M. Also, as an example, the power transmitting antenna i of 103A_i is configured with four antennas. However, the number of antennas configuring the power transmitting antenna i of 103A_i is not limited to four, and may be one or more.

[0028] The distributor 152C receives an input signal 151C corresponding to the transmission signal 102A_i for power transmission in FIGS. 1A and 1B, distributes the input signal 151C, and outputs signals 153C_1, 153C_2, 153C_3, and 153C_4.

[0029] Multiplication unit 154C_1 receives signal 153C_1 and control signal 150C as input, multiplies signal 153C_1 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_1. Coefficient-multiplied signal 155C_1 is then output as a radio wave from antenna 156C_1. Note that control signal 150C corresponds to, for example, control signal 104B_i in FIG. 1B.

[0030] A more specific explanation will be given. Signal 153C_1 is represented as tp1(t). Here, t is time. If the multiplication coefficient is w1, then signal 155C_1 after coefficient multiplication can be represented as tp1(t)×w1. Note that tp1(t) can be represented by a complex number, and therefore may be a real number. Furthermore, w1 can be represented by a complex number, and therefore may be a real number.

[0031] Multiplication unit 154C_2 receives signal 153C_2 and control signal 150C as input, multiplies signal 153C_2 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_2, and outputs coefficient-multiplied signal 155C_2 from antenna 156C_2 as a radio wave. Note that control signal 150C corresponds to, for example, control signal 104B_i in FIG. 1B.

[0032] A more specific explanation will be given. Let us denote signal 153C_2 as tp2(t), where t is time. If the multiplication coefficient is w2, then signal 155C_2 after coefficient multiplication can be expressed as tp2(t)×w2. Note that tp2(t) can be expressed as a complex number, and therefore may be a real number. Also, w2 can be expressed as a complex number, and therefore may be a real number.

[0033] Multiplication unit 154C_3 receives signal 153C_3 and control signal 150C as input, multiplies signal 153C_3 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_3. Coefficient-multiplied signal 155C_3 is then output as a radio wave from antenna 156C_3. Note that control signal 150C corresponds to, for example, control signal 104B_i in FIG. 1B.

[0034] A more specific explanation will be given. Let us denote signal 153C_3 as tp3(t), where t is time. If the multiplication coefficient is w3, then signal 155C_3 after coefficient multiplication can be expressed as tp3(t)×w3. Note that tp3(t) can be expressed as a complex number, and therefore may be a real number. Also, w3 can be expressed as a complex number, and therefore may be a real number.

[0035] Multiplication unit 154C_4 receives signal 153C_4 and control signal 150C as input, multiplies signal 153C_4 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_4, and outputs coefficient-multiplied signal 155C_4 from antenna 156C_4 as a radio wave. Note that control signal 150C corresponds to control signal 104B_i in FIG. 1B, for example.

[0036] A more specific explanation will be given. Let us denote signal 153C_4 as tp4(t), where t is time. If the multiplication coefficient is w4, then signal 155C_4 after coefficient multiplication can be expressed as tp4(t)×w4. Note that tp4(t) can be expressed as a complex number, and therefore may be a real number. Also, w4 can be expressed as a complex number, and therefore may be a real number.

[0037] It should be noted that the absolute values ​​of w1, w2, w3, and w4 may be equal to each other. This is equivalent to a phase change. Naturally, the absolute values ​​of w1, w2, w3, and w4 do not have to be equal to each other.

[0038] The values ​​of w1, w2, w3, and w4 are set based on a control signal 150 C. Note that the values ​​of w1, w2, w3, and w4 may be switchable.

[0039] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0040] 1A and 1B, the configuration of the power transmitting antenna i of 103A_i is different from that shown in FIG. 1C1. Note that i is an integer between 1 and M. In FIG. 1C2, the same numbers are used to designate components that operate in the same manner as in FIG. 1C1, and some of the descriptions thereof will be omitted.

[0041] The multiplication unit 154C_1 receives the signal 153C_1 and the control signal 150C as input, multiplies the signal 153C_1 by a multiplication coefficient based on the control signal 150C, generates the coefficient-multiplied signal 155C_1, and outputs it. The coefficient-multiplied signal 155C_1 is then output as a radio wave from the antenna 156C_1. Note that the control signal 150C corresponds to the control signal 104B_i in FIG. 1B, for example, and the signal 153C_1 corresponds to the transmission signal 102A_i for power transmission in FIGS. 1A and 1B.

[0042] A more specific explanation will be given. Signal 153C_1 is represented as tp1(t). Here, t is time. If the multiplication coefficient is w1, then signal 155C_1 after coefficient multiplication can be represented as tp1(t)×w1. Note that tp1(t) can be represented by a complex number, and therefore may be a real number. Furthermore, w1 can be represented by a complex number, and therefore may be a real number.

[0043] The value of w1 is set based on the control signal 150 C. The value of w1 may be switchable.

[0044] When applied to the power transmitting antenna i of 103A_i in FIG. 1A, the power transmitting antenna i of 103A_i may be configured with the antenna 156C_1 in FIG. 1C2.

[0045] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0046] 1D1 shows an example of the configuration of a portion of the power transmitting unit 101A, 103A_i configured by the power transmitting antenna i in FIG. 1A, where i is an integer between 1 and M.

[0047] The transmission directivity control unit 181D receives the received data 125A and the control signal 198A as inputs. The transmission directivity control unit 181D then performs calculations for controlling the transmission directivity based on the received data 125A, for example.

[0048] Note that received data 125A may not be data, but may be a channel estimation signal, etc. In this case, transmission directivity control section 181D in Fig. 1D1 receives a signal instead of received data 125A as input.

[0049] Then, the transmission directivity control unit 181D outputs transmission signals 102A_1, . . . , 102A_i, . . . , 102A_M for power transmission based on the transmission directivity control.

[0050] The transmission directivity control unit 181D may select an antenna to be used in accordance with the calculation for transmission directivity control.

[0051] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0052] 1D2 shows an example of the configuration of a portion configured by the power transmitting antenna i of the power transmitting unit 101A, 103A_i in FIG. 1B. Note that i is an integer between 1 and M. Note that in FIG. 1D2, components that operate in the same manner as in FIG. 1D1 are assigned the same numbers, and some descriptions will be omitted.

[0053] The transmission directivity control unit 181D receives the received data 125A and the control signal 198A as inputs. The transmission directivity control unit 181D then performs calculations for controlling the transmission directivity based on the received data 125A, for example.

[0054] Note that received data 125A may not be data, but may be a channel estimation signal, etc. In this case, transmission directivity control section 181D in Fig. 1D2 receives a signal instead of received data 125A as input.

[0055] Then, the transmission directivity control unit 181D outputs transmission signals 102A_1, . . . , 102A_i, . . . , 102A_M for power transmission based on the transmission directivity control.

[0056] The transmission directivity control unit 181D may select an antenna to be used in accordance with the calculation for transmission directivity control.

[0057] Furthermore, the transmission directivity control unit 181D outputs an antenna control signal 104B_i for controlling the power transmitting antenna i of 103A_i, for example, based on the received data 125A. The power transmitting antenna i of 103A_i is controlled based on the antenna control signal 104B_i, but this point has already been explained, so further explanation will be omitted.

[0058] Note that received data 125A may not be data, but may be a channel estimation signal, etc. In this case, transmission directivity control section 181D in Fig. 1D2 receives a signal instead of received data 125A as input.

[0059] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0060] FIG. 1E shows an example of the configuration of a "power transmission and communication device" in this embodiment, such as a base station or an access point.

[0061] The control unit 199E outputs a control signal 198E including control information for communication and control information for power transmission.

[0062] Power transmission and transmission unit 131E receives received data 125E and control signal 198E as input, and when control signal 198E instructs execution of power transmission, outputs transmission signals 132E_1, ..., 132E_i, ..., 132E_M for power transmission, where M is an integer equal to or greater than 1 or 2, and i is an integer equal to or greater than 1 and equal to or less than M.

[0063] Then, transmission signal 132E_1 for power transmission is output as radio waves from power transmission and transmission antenna 1 of 133E_1. ... Transmission signal 132E_i for power transmission is output as radio waves from power transmission and transmission antenna i of 133E_i. ... Transmission signal 132E_M for power transmission is output as radio waves from power transmission and transmission antenna M of 133E_M.

[0064] The power transmission and transmission unit 131E receives received data 125E, transmitted data 126E, and a control signal 198E as input, and when the control signal 198E indicates that signal transmission for communication is to be performed, performs processing such as error correction coding and modulation on the transmitted data 126E, and outputs transmitted signals 132E_1, ..., 132E_i, ..., 132E_M for communication.

[0065] Then, a transmission signal 132E_1 for communication is output as a radio wave from the power transmission and transmission antenna 1 of 133E_1. A transmission signal 132E_i for communication is output as a radio wave from the power transmission and transmission antenna i of 133E_i. A transmission signal 132E_M for communication is output as a radio wave from the power transmission and transmission antenna M of 133E_M.

[0066] The communication processing unit 124E receives transmission data 126E and a control signal 198E as input, and when the control signal 198E indicates that communication is to be carried out, performs processing such as error correction coding and modulation on the transmission data 126E, and outputs a transmission signal 123E, which is output as radio waves from the communication antenna 121E.

[0067] The communication processing unit 124E receives the received signal 122E received by the communication antenna 121E and the control signal 198E as input, and performs processes such as demodulation and error correction decoding on the received signal 122E based on the control signal 198E, and outputs received data 125E.

[0068] 1E may have a configuration in which a processing unit not shown in FIG. 1E is added. Furthermore, the communication antenna 121E and communication processing unit 124E in FIG. 1E (and FIG. 1F) may perform transmission and / or reception corresponding to MIMO transmission in which multiple modulated signals (multiple streams) are transmitted using multiple antennas. Therefore, the communication antenna 121E may be one or more antennas, or two or more antennas. Furthermore, the transmission signal 123E may be composed of multiple signals. And the reception signal 122E may be composed of multiple signals.

[0069] The configuration of the power transmission and transmission antenna i of 103E_i is the same as the configuration of the power transmission antenna 103A_i in FIGS. 1A and 1B, and has already been described, so description thereof will be omitted.

[0070] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0071] Fig. 1F shows a configuration example of a "power transmission and communication device" according to the present embodiment, which is different from that shown in Fig. 1E, and is exemplified by a base station, an access point, etc. In Fig. 1F, components that operate in the same manner as those in Fig. 1E are given the same numbers, and some of the descriptions thereof will be omitted.

[0072] A characteristic feature of Figure 1F is that the power transmission and transmission unit 131E outputs antenna control signals 134F_1, ..., 134F_i, ..., 134F_M, which control the power transmission and transmission antenna M of 133E_M, which control the power transmission and transmission antenna 1 of 133E_1, ..., 134F_i, ..., 134F_M, which control the power transmission and transmission antenna M of 133E_M.

[0073] The configuration of the power transmission and transmission antenna i of 103E_i is the same as the configuration of the power transmission antenna 103A_i in FIGS. 1A and 1B, and has already been described, so description thereof will be omitted.

[0074] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0075] FIG. 1G shows an example of the configuration of a "power transmission and communication device" in this embodiment, such as a base station or an access point.

[0076] The control unit 199G outputs a control signal 198G including control information for communication and control information for power transmission.

[0077] Power transmission and communication processing unit 141G receives control signal 198G and reception signals 144G_1, ..., 144G_i, ..., 144G_M for communication as input, and when control signal 198G instructs execution of power transmission, outputs transmission signals 142G_1, ..., 142G_i, ..., 142G_M for power transmission, where M is an integer equal to or greater than 1 or 2, and i is an integer equal to or greater than 1 and equal to or less than M.

[0078] Then, a transmission signal 142G_1 for power transmission is output as radio waves from a power transmission and communication antenna 143G_1. A transmission signal 142G_i for power transmission is output as radio waves from a power transmission and communication antenna i of 143G_i. A transmission signal 142G_M for power transmission is output as radio waves from a power transmission and communication antenna M of 143G_M.

[0079] The power transmission and communication processing unit 141G receives as input a control signal 198G, received signals for communication 144G_1, ..., 144G_i, ..., 144G_M, and transmission data 126G, and when the control signal 198G instructs the implementation of signal transmission for communication, it performs processing such as error correction coding and modulation on the transmission data 126G and outputs transmission signals for communication 143G_1, ..., 143G_i, ..., 143G_M.

[0080] A transmission signal 142G_1 for communication is output as radio waves from the power transmission and communication antenna 1 of 143G_1. A transmission signal 142G_i for communication is output as radio waves from the power transmission and communication antenna i of 143G_i. A transmission signal 142G_M for communication is output as radio waves from the power transmission and communication antenna M of 143G_M.

[0081] The power transmission and communication processing unit 141G receives a control signal 198G, received signals for communication 144G_1, ..., 144G_i, ..., 144G_M, and transmission data 126G as input, and when the control signal 198G instructs the implementation of signal reception for communication, the power transmission and communication processing unit 141G receives received signals for communication 144G_1, ..., 143G_i received by the power transmission and communication antenna 143G_1, ..., 143G_i received by the power transmission and communication antenna 143G_i, ..., 143G_i received by the The receiving signal 144G_M for communication received at the power transmission antenna 43G_M and the communication antenna M is used as input, and the receiving signal 144G_1, ..., 143G_i for communication received at the power transmission antenna 143G_1 and the communication antenna 1, ..., 144G_i, ..., 143G_M for communication received at the power transmission antenna i and the communication antenna M is subjected to processing such as demodulation and error correction decoding, and the receiving data 125G is output.

[0082] 1G may have a configuration in which a processing unit not shown in Fig. 1G is added. Furthermore, the power transmission and communication processing unit 141G in Fig. 1G (and Fig. 1H) may perform transmission and / or reception corresponding to MIMO transmission in which multiple modulated signals (multiple streams) are transmitted using multiple antennas.

[0083] The configuration of the power transmission and communication antenna i of 143G_i is the same as the configuration of the power transmission antenna 103A_i in FIGS. 1A and 1B, and has already been described, so description thereof will be omitted.

[0084] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0085] Fig. 1H shows a configuration example of the "power transmission and communication device" according to the present embodiment, which is different from that shown in Fig. 1G, and is exemplified by a base station, an access point, etc. In Fig. 1H, components that operate in the same manner as those in Fig. 1G are assigned the same numbers, and some of the descriptions thereof will be omitted.

[0086] A characteristic feature of Figure 1H is that the power transmission and communication processing unit 141G outputs antenna control signals 145H_1, ..., 145H_i, ..., 145H_M, which control the power transmission and communication antenna M of 143G_M, which control the power transmission and communication antenna 1 of 143G_1, ..., 145H_i, ..., 145H_M, which control the power transmission and communication antenna M of 143G_M.

[0087] The configuration of the power transmission and communication antenna i of 143G_i is the same as the configuration of the power transmission antenna 103A_i in FIGS. 1A and 1B, and has already been described, so description thereof will be omitted.

[0088] By doing as described above, it becomes possible to control the directionality of the signal for power transmission, and as a result, a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point can achieve the effect of being able to charge with high efficiency.

[0089] Note that Figures 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H are examples of the configuration of a "device for power transmission and communication" such as a base station or an access point, and the method of configuring the device is not limited to these examples.

[0090] 2A shows an example of the configuration of a device (e.g., a terminal) that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station, an access point, etc., and charges a battery. Note that the device (e.g., a terminal) that charges a battery may be an example of a wireless device, a charging device, a power receiving device, a communication device, etc.

[0091] Control unit 299A receives received data 225A (or a signal generated by receiving it) as input, and outputs control signal 298A including communication control information and charging control information.

[0092] The charging unit 203A receives as input the control signal 298A, the received data 225A, and the received signals for charging 202A_1, ..., 202A_i, ..., 202A_N received at the receiving antenna i of 201A_1 and the receiving antenna N of 201A_N, and charges the battery (cells) when the control signal 298A instructs to perform charging. N is an integer equal to or greater than 1 or 2, and i is an integer equal to or greater than 1 and equal to or less than N.

[0093] The communication processing unit 224A receives transmission data 226A and a control signal 298A as input, and when the control signal 298A indicates that communication is to be carried out, performs processing such as error correction coding and modulation on the transmission data 226A, and outputs a transmission signal 223A, which is output as radio waves from the communication antenna 221A.

[0094] The communication processing unit 224A receives the received signal 222A and the control signal 298A received by the communication antenna 221A as input, and performs processes such as demodulation and error correction decoding on the received signal 222A based on the control signal 298A, and outputs received data 225A.

[0095] 2A may have a configuration in which a processing unit not shown in FIG. 2A is added. Furthermore, the communication antenna 221A and communication processing unit 224A in FIG. 2A (and FIG. 2B) may perform transmission and / or reception corresponding to MIMO transmission in which multiple modulated signals (multiple streams) are transmitted using multiple antennas. Therefore, the communication antenna 221A may be one or more antennas, or two or more antennas. Furthermore, the transmission signal 223A may be composed of multiple signals. And the reception signal 222A may be composed of multiple signals.

[0096] The configuration of the power receiving antenna i of 201A_i will be described in detail later.

[0097] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0098] Furthermore, as shown in FIG. 2A , by separating the RF circuit (analog circuit) for charging from the RF circuit (analog circuit) for communication, it is possible to obtain the effect of easily providing an RF circuit suited to the purpose of charging or communication (for example, the presence or absence of a low noise amplifier).

[0099] Fig. 2B shows a different configuration example from Fig. 2A of a device (e.g., a terminal) that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point in this embodiment and charges a battery. In Fig. 2B, components that operate in the same way as in Fig. 2A are assigned the same numbers, and some explanations will be omitted.

[0100] A characteristic feature of Figure 2B is that the charging unit 203A outputs antenna control signals 204B_1 to control the receiving antenna 1 of 201A_1, ..., antenna control signals 204B_i to control the receiving antenna i of 201A_i, ..., antenna control signals 204B_N to control the receiving antenna N of 201A_N.

[0101] The configuration of the power receiving antenna i of 201A_i will be described in detail later.

[0102] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0103] Furthermore, as shown in FIG. 2A , by separating the RF circuit (analog circuit) for charging from the RF circuit (analog circuit) for communication, it is possible to obtain the effect of easily providing an RF circuit suited to the purpose of charging or communication (for example, the presence or absence of a low noise amplifier).

[0104] 2A and 2B. Note that i is an integer between 1 and N. As an example, the power receiving antenna i of 201A_i is configured with four antennas. However, the number of antennas configuring the power receiving antenna i of 201A_i is not limited to four, and may be one or more.

[0105] Multiplication unit 253C_1 receives first received signal 252C_1 received by antenna 251C_1 and control signal 250C as input, multiplies first received signal 252C_1 by a multiplication coefficient based on control signal 250C, and outputs first received signal 254C_1 after coefficient multiplication. Note that control signal 250C corresponds to control signal 204B_i in FIG. 2B, for example.

[0106] A more specific explanation will be given. The first received signal 252C_1 is represented as rp1(t). Here, t is time. If the multiplication coefficient is d1, the first received signal 254C_1 after coefficient multiplication can be represented as rp1(t)×d1. Note that rp1(t) can be represented as a complex number and therefore may be a real number. Furthermore, d1 can be represented as a complex number and therefore may be a real number.

[0107] Multiplication unit 253C_2 receives second received signal 252C_2 received by antenna 251C_2 and control signal 250C as input, multiplies second received signal 252C_2 by a multiplication coefficient based on control signal 250C, and outputs second received signal 254C_2 after coefficient multiplication. Note that control signal 250C corresponds to control signal 204B_i in FIG. 2B, for example.

[0108] A more specific explanation will be given. The second received signal 252C_2 is represented as rp2(t), where t is time. If the multiplication coefficient is d2, the second received signal 254C_2 after coefficient multiplication can be represented as rp2(t)×d2. Note that rp2(t) can be represented as a complex number and therefore may be a real number. Furthermore, d2 can be represented as a complex number and therefore may be a real number.

[0109] Multiplication unit 253C_3 receives third received signal 252C_3 received by antenna 251C_3 and control signal 250C as input, multiplies third received signal 252C_3 by a multiplication coefficient based on control signal 250C, and outputs third received signal 254C_3 after coefficient multiplication. Note that control signal 250C corresponds to control signal 204B_i in FIG. 2B, for example.

[0110] A more specific explanation will be given. The third received signal 252C_3 is represented as rp3(t). Here, t is time. If the multiplication coefficient is d3, the third received signal 254C_3 after coefficient multiplication can be represented as rp3(t)×d3. Note that rp3(t) can be represented as a complex number and therefore may be a real number. Furthermore, d3 can be represented as a complex number and therefore may be a real number.

[0111] Multiplication unit 253C_4 receives fourth received signal 252C_4 received by antenna 251C_4 and control signal 250C as input, multiplies fourth received signal 252C_4 by a multiplication coefficient based on control signal 250C, and outputs fourth received signal 254C_4 after coefficient multiplication. Note that control signal 250C corresponds to control signal 204B_i in FIG. 2B, for example.

[0112] A more specific explanation will be given. The fourth received signal 252C_4 is represented as rp4(t), where t is time. If the multiplication coefficient is d4, the fourth received signal 254C_4 after coefficient multiplication can be represented as rp4(t)×d4. Note that rp4(t) can be represented as a complex number and therefore may be a real number. Furthermore, d4 can be represented as a complex number and therefore may be a real number.

[0113] The combining / combining unit 255C receives as input the first received signal 254C_1 after coefficient multiplication, the second received signal 254C_2 after coefficient multiplication, the third received signal 254C_3 after coefficient multiplication, and the fourth received signal 254C_4 after coefficient multiplication, combines the first received signal 254C_1 after coefficient multiplication, the second received signal 254C_2 after coefficient multiplication, the third received signal 254C_3 after coefficient multiplication, and the fourth received signal 254C_4 after coefficient multiplication, and outputs a signal 256C. Note that the signal 256C is expressed as rp1(t)×d1+rp2(t)×d2+rp3(t)×d3+rp4(t)×d4.

[0114] The signal 256C corresponds to the reception signal 202A_i for charging received by the power receiving antenna i 201A_i in FIGS. 2A and 2B.

[0115] Furthermore, the absolute values ​​of d1, d2, d3, and d4 may be equal to each other. This corresponds to a phase change. Naturally, the absolute values ​​of d1, d2, d3, and d4 do not have to be equal to each other.

[0116] The values ​​of d1, d2, d3, and d4 are set based on a control signal 250 C. Note that the values ​​of d1, d2, d3, and d4 may be switchable.

[0117] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0118] Fig. 2D shows an example of the configuration of the power receiving antenna i of 201A_i in Fig. 2A and Fig. 2B, which is different from that shown in Fig. 2C, where i is an integer between 1 and N.

[0119] The multiplication unit 253D_1 receives the first received signal 252D_1 received by the antenna 251D_1 and the control signal 250D as input, multiplies the first received signal 252D_1 by a multiplication coefficient based on the control signal 250D, and outputs the first received signal 254D_1 after the coefficient multiplication. Note that the control signal 250D corresponds to the control signal 204B_i in FIG. 2B, for example.

[0120] A more specific explanation will be given. The first received signal 252D_1 is represented as rp1(t). Here, t is time. If the multiplication coefficient is d1, the first received signal 254D_1 after coefficient multiplication can be represented as rp1(t)×d1. Note that rp1(t) can be represented as a complex number, and therefore may be a real number. Furthermore, d1 can be represented as a complex number, and therefore may be a real number.

[0121] The first received signal 254D_1 after the coefficient multiplication corresponds to the received signal 202A_i for charging received by the power receiving antenna i 201A_i in FIGS. 2A and 2B.

[0122] The value of d1 is set based on the control signal 250D. Note that the value of d1 may be switchable.

[0123] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0124] FIG. 2E shows an example of the configuration of a device (e.g., a terminal) that receives a power transmission signal transmitted by a "power transmission and communication device" such as a base station or an access point, and charges a battery.

[0125] Control unit 299E receives received data 225E (or a signal generated by receiving the data) as input, and outputs control signal 298E including communication control information and charging control information.

[0126] The charging and receiving unit 233E receives as input the control signal 298E, the received data 225E, and the received signals 232E_1, ..., 231E_i, ..., 231E_N for charging received at the power receiving and receiving antennas i and N, respectively, of 231E_1, ..., 232E_i, ..., 231E_N for charging received at the power receiving and receiving antennas N, and charges the battery (cell) when the control signal 298E instructs to perform charging. Note that N is an integer of 1 or more or 2 or more, and i is an integer of 1 to N.

[0127] The charging and receiving unit 233E receives as input a control signal 298E, received data 225E, and received signals 232E_1, ..., 231E_i, ..., 231E_N for communication received at receiving antenna i and receiving antenna N for power reception and reception of 231E_1, and performs processes such as demodulation and error correction decoding on received signals 232E_1, ..., 231E_i, ..., 231E_N for communication received at receiving antenna i and receiving antenna N for power reception and reception of 231E_1, and outputs received data 234E.

[0128] The communication processing unit 224E receives transmission data 226E and a control signal 298E as input, and when the control signal 298E indicates that communication is to be carried out, performs error correction coding, modulation, and other processing on the transmission data 226E, and outputs a transmission signal 223E, which is output as radio waves from the communication antenna 221E.

[0129] The communication processing unit 224E receives the received signal 222E and the control signal 298E via the communication antenna 221E as input, and performs processes such as demodulation and error correction decoding on the received signal 222E based on the control signal 298E, and outputs received data 225E.

[0130] 2E may have a configuration in which a processing unit not shown in FIG. 2E is added. Furthermore, the communication antenna 221E and communication processing unit 224E in FIG. 2E (and FIG. 2F) may perform transmission and / or reception corresponding to MIMO transmission in which multiple modulated signals (multiple streams) are transmitted using multiple antennas. Therefore, the communication antenna 221E may be one or more antennas, or two or more antennas. Furthermore, the transmission signal 223E may be composed of multiple signals. And the reception signal 222E may be composed of multiple signals.

[0131] The configuration of the power reception and receiving antenna i of 231E_i is the same as the configuration of the power reception antenna i of 201A_i in FIGS. 2A and 2B, and has already been described, so description thereof will be omitted.

[0132] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0133] Fig. 2F shows a different configuration example from Fig. 2E of a device (e.g., a terminal) that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point in this embodiment and charges a battery. In Fig. 2F, components that operate in the same way as in Fig. 2E are assigned the same numbers, and some explanations will be omitted.

[0134] A characteristic feature of Figure 2F is that the charging and receiving unit 233E outputs antenna control signals 234F_1, ..., 234F_i, ..., 234F_N, which control the power receiving and receiving antenna N of 231E_N, which control the power receiving and receiving antenna 1 of 231E_1, ..., 231E_i, ..., 231E_N, respectively.

[0135] The configuration of the power reception and receiving antenna i of 231E_i is the same as the configuration of the power reception antenna i of 201A_i in FIGS. 2A and 2B, and has already been described, so description thereof will be omitted.

[0136] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0137] FIG. 2G shows an example of the configuration of a device (e.g., a terminal) that receives a power transmission signal transmitted by a "power transmission and communication device" such as a base station or an access point, and charges a battery.

[0138] Control unit 299G receives received data 234G (or a signal generated by receiving the data) as input, and outputs control signal 298G including communication control information and charging control information.

[0139] Charging and communication processing unit 273G receives control signal 298G, transmission data 235G, and reception signals 272G_1, ..., 271G_i, ..., 271G_N for charging received at antenna i and antenna N for charging, as input, and charges the battery (cell) when control signal 298G instructs charging to be performed. N is an integer equal to or greater than 1 or 2, and i is an integer equal to or greater than 1 and equal to or less than N.

[0140] The charging and communication processing unit 273G receives as input a control signal 298G, transmission data 235G, and reception signals 272G_1, ..., 271G_i for communication received at antenna i of 271G_1 and reception signals 272G_i, ..., 271G_N for communication received at antenna N of 272G_N, and when the control signal 298G instructs the execution of signal transmission for communication, it performs processing such as error correction coding and modulation on the transmission data 235G and outputs transmission signals 274G_1, ..., 274G_i, ..., 274G_N for communication.

[0141] A transmission signal 274G_1 for communication is received by 271G_1 and output as radio waves from communication antenna 1. A transmission signal 274G_i for communication is received by 271G_i and output as radio waves from communication antenna i. A transmission signal 274G_N for communication is received by 271G_N and output as radio waves from communication antenna N.

[0142] The charging and communication processing unit 273G receives as input a control signal 298G, transmission data 235G, and received signals 272G_1, ..., 271G_i, ..., 272G_N for communication received at the power receiving and communication antenna 1 of 271G_1, and performs processes such as demodulation and error correction decoding on received signals 272G_1, ..., 271G_i, ..., 272G_N for communication received at the power receiving and communication antenna 1 of 271G_1, and received signals 272G_i, ..., 271G_N for communication received at the power receiving and communication antenna N of 271G_1, and outputs received data 234G.

[0143] 2G may have a configuration in which a processing unit not shown in FIG. 2G is added. Furthermore, charging and communication processing unit 273GE in FIG. 2G (and FIG. 2H) may perform transmission and / or reception corresponding to MIMO transmission in which multiple modulated signals (multiple streams) are transmitted using multiple antennas.

[0144] The configuration of the power receiving and communication antenna i of 271G_i is the same as the configuration of the power receiving antenna i of 201A_i in FIGS. 2A and 2B, and has already been described, so description thereof will be omitted.

[0145] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0146] Fig. 2H shows a different configuration example from Fig. 2G of a device (e.g., a terminal) that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point in this embodiment and charges a battery. In Fig. 2H, components that operate in the same way as in Fig. 2G are assigned the same numbers, and some explanations will be omitted.

[0147] A characteristic feature of Figure 2H is that the charging and communication processing unit 273G outputs antenna control signals 275H_1, ..., 275H_i, ..., 275H_N, which control the power receiving and communication antenna N of 271G_N, which control the power receiving and communication antenna 1 of 271G_1, ..., 275H_i, ..., 275H_N, which control the power receiving and communication antenna N of 271G_N.

[0148] The configuration of the power receiving and communication antenna i of 271G_i is the same as the configuration of the power receiving antenna i of 201A_i in FIGS. 2A and 2B, and has already been described, so description thereof will be omitted.

[0149] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0150] FIG. 2I shows an example of the configuration of the charging-related operating units included in the charging unit 203A in FIGS. 2A and 2B, the charging and receiving unit 233E in FIGS. 2E and 2F, and the charging and communication processing unit 273G in FIGS. 2G and 2H.

[0151] The stabilization circuit 2811 receives a signal received by an antenna and stabilizes the signal. For example, the stabilization circuit 2811 can stabilize a DC (Direct Current) output by charging a capacitor to accommodate fluctuating input power. The stabilized signal then passes through a charging circuit 2821, charging a battery 2831. The battery 2831 supplies power (voltage, current) to each component.

[0152] Fig. 2J1 shows an example of the configuration of the charging and receiving unit 233E of Fig. 2E and Fig. 2F. In Fig. 2J1, components that operate in the same manner as in Fig. 2I are given the same numbers, and some descriptions will be omitted.

[0153] The switching unit 285J receives the received signal 284J and the control signal 292J as input, and outputs a signal based on the control signal 292J to either an LNA (Low Noise Amplifier) ​​287J or a stabilization circuit 2811. The received signal 284J corresponds to the received signal 232E_i for charging (communication) in Figures 2E and 2F, and the control signal 292J corresponds to the control signal 298E in Figures 2E and 2F.

[0154] A characteristic feature is that when a received signal 284J corresponding to the received signal 232E_i is a signal for communication, a signal 286J is output. (When the received signal 284J is a signal for charging, it is input to a stabilization circuit 2811.)

[0155] The LNA 287J receives the signal 286J and the control signal 292J as input, amplifies the signal 286J based on the control signal 292J, and outputs a signal 288J.

[0156] The receiving unit 289J receives the control signal 292J and the signal 288J as input, and performs operations such as demodulation and error correction decoding of the signal 288J based on the control signal 292J, and outputs the received data 290J, as well as a signal 291J including the control information, feedback information, and signal obtained from the signal transmitted by the communication partner.

[0157] The antenna control signal 234F_i for controlling the power reception of 231E_i and the receiving antenna i in Fig. 2F can be generated using the received data 290J and the signal 291J, as will be described later.

[0158] Fig. 2J2 shows an example of the configuration of the charging and communication processing unit 273G in Fig. 2G and Fig. 2H. In Fig. 2J2, components that operate in the same manner as in Fig. 2I and Fig. 2J1 are given the same numbers, and some descriptions will be omitted.

[0159] Transmitting unit 294J receives transmission data 293J and control signal 292J as input, performs error correction coding, modulation, and other processing on transmission data 293J based on control signal 292J, and outputs transmission signal 295J. Note that transmission data 293J corresponds to transmission data 235G in Figures 2G and 2H, and transmission signal 295J corresponds to transmission signal 274G_i for communication in Figures 2G and 2H.

[0160] FIG. 2K shows an example of the configuration of the "communication processing unit in FIGS. 2A and 2B," the "charging and receiving unit in FIGS. 2E and 2F," and the "charging and communication processing unit in FIGS. 2G and 2H."

[0161] The reception processing unit 243K receives the reception signal 241K and the control signal 242K as input, performs processing such as demodulation and error correction decoding based on the control signal 242K, and outputs reception data 244K.

[0162] In addition, the received signal 241K corresponds to "the received signal 222A in Figures 2A and 2B," "the received signals 232E_1, ..., 231E_i for receiving power of 231E_1 and communication received at receiving antenna 1 in Figures 2E and 2F and the received signals 232E_i, ..., 231E_N for receiving power of 231E_1 and communication received at receiving antenna i and the received signals 232E_N for communication received at receiving antenna N," and "the received signals 272G_1, ..., 271G_i for receiving power of 271G_1 and communication received at communication antenna 1 in Figures 2G and 2H and the received signals 272G_i, ..., 271G_N for communication received at communication antenna i and the received signals 272G_N for communication received at communication antenna N."

[0163] The control signal 242K corresponds to the "control signal 298A in FIGS. 2A and 2B," the "control signal 298E in FIGS. 2E and 2F," and the "control signal 298G in FIGS. 2G and 2H."

[0164] The received data 244K corresponds to the "received data 225A in FIGS. 2A and 2B," "received data 234E in FIGS. 2E and 2F," and "received data 234G in FIGS. 2G and 2H."

[0165] The analysis unit 245K receives the received signal 241K and the control signal 242K as input, analyzes the received signal 241K, and outputs a signal 246K representing the analysis result.

[0166] The analysis result signal 246K corresponds to "received data 225A in Figures 2A and 2B," "signal inside the charging and receiving unit 233E in Figures 2E and 2F," and "signal inside the charging and communication processing unit 273G in Figures 2G and 2H."

[0167] Then, using the analysis result signal 246K, the "communication processing unit in Figures 2A and 2B," "charging and receiving unit in Figures 2E and 2F," and "charging and communication processing unit in Figures 2G and 2H" will perform receiving directivity control when receiving a signal for charging.

[0168] In order to control the reception directivity, based on the signal 246K of the analysis result, "antenna control signal 204B_1 to control the power receiving antenna 1 of 201A_1 in FIG. 2B, antenna control signal 204B_i to control the power receiving antenna i of 201A_i, ..., antenna control signal 204B_N to control the power receiving antenna N of 201A_N" and "antenna control signal 234F_1 to control the power receiving and receiving antenna 1 of 231E_1 in FIG. 2F, antenna control signal 234F_1 to control the power receiving and receiving antenna 1 of 231E_1, ..., antenna control signal 234F_2 to control the power receiving and receiving antenna 2 of 231E_i" are generated. The following signals are generated: antenna control signals 234F_N which control the power receiving and communication antenna N of antenna control signals 234F_i, ..., 231E_N which control receiving antenna i; and antenna control signals 275H_1, ..., 275H_N which control the power receiving and communication antenna N of antenna control signals 275H_1, ..., 271G_i which control the power receiving and communication antenna i of antenna control signals 275H_1, ..., 271G_N which control the power receiving and communication antenna N of antenna control signals 275H_1, ..., 271G_i which control the power receiving and communication antenna i of antenna control signals 275H_N which control the power receiving and communication antenna N of antenna control signals 275H_1, ..., 271G ...i which control the power receiving and communication antenna i of antenna control signals 275H_N in FIG. 2H.

[0169] By doing so, it becomes possible to control the directionality of the signal when receiving power for charging, which may enable highly efficient charging. This will be described in detail later.

[0170] 2A, 2B, 2E, 2F, 2G, and 2H are examples of the configuration of a device (e.g., a terminal) that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point and charges a battery, but the method of configuring the device is not limited to this example. Also, a device that charges a battery may be equipped with one or more batteries, or two or more batteries.

[0171] Fig. 3A shows an example of the relationship between a base station and a terminal. Fig. 3A shows an example of the relationship between a "base station, which is an example of a 'power transmission and communication device' having the configurations shown in Figs. 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H" and a "terminal, which is an example of a device that receives a signal for power transmission transmitted by a 'power transmission and communication device' having the configurations shown in Figs. 2A, 2B, 2E, 2F, 2G, and 2H and charges a battery."

[0172] Although the term "base station" is used here, the base station can be implemented as a "TRP (Transmission / Reception point (TX / RX) point)" (Transmitter / Receiver point (TX)). Therefore, although the term "base station" will be used in the following explanation, it can be replaced with "TRP."

[0173] It is assumed that a base station #1 of 301_1 is transmitting power wirelessly to a terminal #1 of 302_1.

[0174] Also, it is assumed that the base station #1 of 301_1 transmits power wirelessly to the terminal #2 of 302_2, and that the base station #1 of 301_1 and the terminal #2 of 302_2 are communicating with each other.

[0175] It is assumed that the base station #1 of 301_1 and the terminal #3 of 302_3 are communicating with each other.

[0176] 3A, the base station #1 of 301_1 has a function of performing wireless power transmission and a function of performing communication. Note that the configuration of the device having the function of performing wireless power transmission and the function of performing communication has already been explained, and therefore the explanation will be omitted.

[0177] Terminal #1 of 302_1 has a charging function via wireless power transmission. In this case, the terminal is equipped with a charging function unit 398B, as shown in FIG. 3B1, for example. Alternatively, a communication function may be used in part. The configuration in this case has already been explained, so an explanation will be omitted.

[0178] The terminal #2 of 302_2 has a charging function and a communication function by wireless power transmission. The configuration of this terminal has already been described, so the description will be omitted.

[0179] In this case, the terminal #3 of the terminal 302_3 has a communication function. For example, as shown in FIG. 3B2, the terminal is provided with a communication function unit 399B.

[0180] In FIG. 3A, base station #1 of 301_1 communicates with three terminals, but the same implementation is possible if the number of terminals with which base station #1 of 301_1 communicates is one or more.

[0181] Figure 3C shows another example of the relationship between a base station and a terminal. Figure 3C shows an example of the relationship between "a base station, which is an example of a 'power transmission and communication device' having the configurations shown in Figures 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H," and "a terminal, which is an example of a device that receives a signal for power transmission transmitted by a 'power transmission and communication device' having the configurations shown in Figures 2A, 2B, 2E, 2F, 2G, and 2H and charges a battery (cell)." In Figure 3C, the same components as those in Figure 3A are assigned the same numbers, and some descriptions will be omitted.

[0182] It is assumed that the base station #1 of 301_1 is transmitting power wirelessly to the terminal #1 of 302_1, and that the base station #1 of 301_1 is transmitting power wirelessly to the terminal #2 of 302_2.

[0183] It is assumed that the base station #2 of 301_2 and the terminal #2 of 302_2 are communicating with each other, and the base station #2 of 301_2 and the terminal #3 of 302_3 are communicating with each other.

[0184] In the example of Fig. 3C, the base station #1 301_1 has a function for wireless power transmission. Therefore, as shown in Fig. 3D1, the base station #1 301_1 is equipped with a power transmission function unit 396D. As an alternative, a communication function may be partially used. The configuration in this case has already been explained, so explanation will be omitted.

[0185] In the example of Fig. 3C, the base station #2 of 301_2 has a function for performing communication. Therefore, as shown in Fig. 3D2, the base station #2 of 301_2 is equipped with a communication function unit 397D.

[0186] Terminal #1 302_1 in Fig. 3C has a charging function using wireless power transmission. In this case, for example, as shown in Fig. 3B1, the terminal is equipped with a charging function unit 398B. Alternatively, a communication function may be used in part. The configuration in this case has already been explained, so explanation will be omitted.

[0187] 3C has a charging function and a communication function by wireless power transmission. The configuration of the terminal #2 has already been described, so a description thereof will be omitted.

[0188] The terminal #3 302_3 in Fig. 3C has a communication function. In this case, the terminal has a configuration such as that shown in Fig. 3B2, in which the terminal is provided with a communication function unit 399B.

[0189] 3C, the base station #1 of 301_1 and the base station #2 of 301_2 may be communicating with each other. In this case, the communication may be performed via another device.

[0190] Also, Figure 3C shows an example where the number of base stations is two and the number of terminals is three, but this is not limited to this, and it can be implemented in the same way as long as the number of base stations is one or more than two and the number of terminals is one or more.

[0191] As shown in Figures 3A and 3C, a "base station capable of wireless power transmission (power transmission)," a "base station capable of communication," and a "base station capable of wireless power transmission and communication" may exist within the system.

[0192] As shown in FIGS. 3A and 3C, a "chargeable terminal," a "communication-capable terminal," and a "chargeable and communication-capable terminal" may exist within the system.

[0193] Next, a method for using receive beamforming when a terminal is charging will be described.

[0194] The configuration of a terminal, which is a device that receives a signal for power transmission transmitted by a "device for power transmission and communication" such as a base station or an access point and charges a battery, is shown in Figures 2A, 2B, 2E, 2F, 2G, and 2H, and as explained above, it is described that receive beamforming can be used. The terminal has the configuration shown in Figure 2K, and performs receive beamforming using the analysis results of analysis unit 245K.

[0195] Attention will be focused on terminal #1 of 302_1 shown in FIGS. 3A and 3C.

[0196] As a first example, assume that terminal #1 of 302_1 does not perform receive beamforming. In this case, the configuration shown in Fig. 2K does not operate, so terminal #1 of 302_1 receives the wireless power transmission signal transmitted by base station #1 of 301_1, and is charged in accordance with the wireless power transmission signal.

[0197] As a second example, assume that terminal #1 of 302_1 performs receive beamforming. At this time, the configuration shown in Fig. 2K operates, consuming power. Terminal #1 of 302_1 receives a wireless power transmission signal transmitted by base station #1 of 301_1 and is charged in accordance with the wireless power transmission signal, but the charging efficiency is reduced by the amount of power consumed by the configuration shown in Fig. 2K.

[0198] To address this issue, a charging method suitable for the terminal situation will be described below.

[0199] As explained using Figures 3A and 3C, attention is paid to the fact that "chargeable terminals," "communication-capable terminals," and "chargeable and communication-capable terminals" exist within the system, and in particular, that "chargeable terminals" and "chargeable and communication-capable terminals" exist within the system.

[0200] Considering the above issues, the terminal has the modes shown in Figure 4. Charging mode: A mode in which the terminal operates mainly for charging. Battery consumption reduction mode: This mode does not focus only on charging. The terminal consumes power through communication operations and / or application operations, which reduces the remaining battery power. This mode is a mode for reducing this reduction in the remaining battery power. Communication mode: A mode in which the terminal (and base station) communicates.

[0201] In FIG. 4, for example, it is assumed that the screen mounted on the display unit of the terminal is designated by 400.

[0202] The terminal is assumed to support one or more of the following modes: "charging mode," "battery power saving mode," and "communication mode."

[0203] In this case, for example, when the terminal is in "charging mode," when the terminal receives a wireless power transmission signal transmitted by a base station for charging, it does not need to perform receive beamforming (receive directivity control) to improve charging efficiency.

[0204] When transmitting a wireless power transmission signal, the base station may perform transmission beamforming (transmission directivity control) to improve charging efficiency (although there may be cases where transmission beamforming (transmission directivity control) is not performed).

[0205] A device in "battery reduction mode" is assumed to be communicating. At this time, the device will perform reception operations for communication, and therefore will perform reception beamforming (reception directivity control) when receiving the communication modulated signal. Therefore, when the device performs reception operations for communication, it must operate the analysis unit for reception beamforming (reception directivity control).

[0206] Therefore, the terminal receives the wireless power transmission signal transmitted from the base station based on the receiving beamforming (receiving directivity control) performed in response to the receiving operation of the communication, and charges the terminal, thereby achieving the effect of reducing the decrease in the remaining battery power.

[0207] In this way, if a "terminal capable of charging and communication" performs receive beamforming during communication or charging in "battery remaining capacity reduction mode," the above-mentioned effects can be obtained.

[0208] As already described, in the systems of Figures 3A and 3C, there are "terminals capable of charging," "terminals capable of communication," and "terminals capable of charging and communication." The "terminals capable of charging and communication" will be described in detail below.

[0209] Before describing the "terminal capable of charging and communication," the operation of the base station in FIGS. 3A and 3C will be described.

[0210] Figure 5A shows an example of the time-frequency axis configuration of a modulated signal transmitted by base station #1 301_1 in Figure 3A when base station #1 301_1 in Figure 3A is only performing communication. Figure 5A also shows the time-frequency axis configuration of a modulated signal transmitted by base station #2 301_2 in Figure 3C. In Figure 5A, the horizontal axis represents time and the vertical axis represents frequency.

[0211] As shown in FIG. 5A, a communication modulated signal 501 exists on the time-frequency axis.

[0212] Fig. 5B shows an example of the time-frequency configuration of a signal transmitted by base station #1 301_1 in Fig. 3A when base station #1 301_1 in Fig. 3A is only performing wireless power transmission. Fig. 5B also shows the time-frequency configuration of a signal transmitted by base station #1 301_1 in Fig. 3C. In Fig. 5B, the horizontal axis represents time and the vertical axis represents frequency.

[0213] As shown in FIG. 5B, a wireless power transmission signal 502 exists on the time-frequency axis.

[0214] Fig. 5C shows an example of the time-frequency configuration of the modulated signal and the signal transmitted by base station #1 301_1 in Fig. 3A when base station #1 301_1 in Fig. 3A is performing communication and wireless power transmission. Fig. 5C also shows the time-frequency configuration of the signal transmitted by base station #1 301_1 and base station #2 301_2 in Fig. 3C. In Fig. 5C, the horizontal axis represents time and the vertical axis represents frequency.

[0215] As shown in FIG. 5C, there are regions of the modulated signal for communication 501 and the signal for wireless power transmission 502 on the time-frequency axis.

[0216] In the case of FIG. 3A, the base station #1 of 301_1 transmits a communication modulated signal 501 and a wireless power transmission signal 502.

[0217] In the case of FIG. 3A, the base station #1 of 301_1 transmits the wireless power transmission signal 502, and the base station #2 of 301_2 transmits the modulated communication signal 501.

[0218] In FIG. 5C , "the frequency at which the modulated signal for communication 501 exists and the frequency at which the signal for wireless power transmission 502 exists are the same," but "the frequency at which the modulated signal for communication 501 exists and the frequency at which the signal for wireless power transmission 502 exists may be partially the same."

[0219] We will explain about "devices that can be charged and communicated."

[0220] First, in Figure 3A, we will explain an example in which base station #1 at 301_1 transmits a wireless power transmission signal 502 and a communication modulation signal 501 to terminal #2 at 302_2, which is a ``terminal capable of charging and communication,'' as shown in Figure 5C.

[0221] Fig. 6 shows an example of a modulated signal for communication. As shown in Fig. 6, it is assumed that modulated signal for communication 501 in Fig. 5C includes, for example, a reference signal 601, a data symbol 602, and a control information symbol 603. Note that the configuration of modulated signal for communication 501 is not limited to the configuration shown in Fig. 6. For example, modulated signal for communication 501 may exist at multiple frequencies and / or at multiple times. Furthermore, modulated signal for communication 501 may include other symbols and signals.

[0222] The reference signal may be, for example, a known symbol modulated using PSK modulation in the transmitter / receiver (or the receiver may be able to know the symbol transmitted by the transmitter by synchronizing), a non-zero power signal, a zero power signal, a signal known in the transmitter / receiver, etc., and the receiver uses these signals to perform "frequency synchronization," "time synchronization, channel estimation (of each modulated signal) (estimation of CSI (Channel State Information))," "signal detection," "estimation of the reception state," "estimation of the transmission state," "phase tracking based on phase noise, etc.," "estimation (of the channel, etc. conditions) for performing transmit beamforming and / or receive beamforming," etc.

[0223] FIG. 7A shows an example of an antenna-related configuration in the "configuration of base station #1 of 301_1 described using FIGS. 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0224] 7A shows an example in which base station #1 of 301_1 is equipped with 32 antennas. However, FIG. 7A is an example, and the number of antennas equipped in base station #1 of 301_1 is not limited to 32.

[0225] For example, as shown in Figure 7A, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" are antennas that base station #1 301_1 uses to transmit communication modulated signal 501 in Figure 5C. However, there may be exceptions. This will be explained later.

[0226] Also, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas that base station #1 of 301_1 uses to transmit the wireless power transmission signal 502 in Fig. 5C. However, there may be exceptions.

[0227] Figure 7B shows an example of the antenna-related configuration different from that shown in Figure 7A in the "configuration of base station #1 of 301_1 described using Figures 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0228] In Figure 7B, the same elements as in Figure 7A are assigned the same numbers. As an example, a case is shown in which base station #1 301_1 is equipped with 32 antennas. However, Figure 7B is an example, and the number of antennas equipped in base station #1 301_1 is not limited to 32.

[0229] For example, as shown in FIG. 7B, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 301_1 to transmit communication modulated signal 501 shown in FIG. 5C. However, there may be exceptions. This will be explained later.

[0230] Also, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas that base station #1 of 301_1 uses to transmit the wireless power transmission signal 502 in Fig. 5C. However, there may be exceptions.

[0231] Therefore, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 of 301_1 to transmit communication modulated signal 501 and wireless power transmission signal 502 in Figure 5C.

[0232] Figure 7C shows an example of the antenna-related configuration different from that shown in Figures 7A and 7B in the "configuration of base station #1 of 301_1 described using Figures 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0233] In Figure 7C, the same elements as in Figure 7A are assigned the same numbers. As an example, a case is shown in which base station #1 301_1 is equipped with 32 antennas. However, Figure 7C is an example, and the number of antennas equipped in base station #1 301_1 is not limited to 32.

[0234] For example, as shown in Figure 7C, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 301_1 to transmit communication modulated signal 501 in Figure 5C. However, there may be exceptions. This will be explained later.

[0235] Also, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas that base station #1 of 301_1 uses to transmit the wireless power transmission signal 502 in Fig. 5C. However, there may be exceptions.

[0236] Therefore, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 of 301_1 to transmit communication modulated signal 501 and wireless power transmission signal 502 in Figure 5C.

[0237] Fig. 8A shows an example of the configuration of a reference signal. For example, Fig. 8A shows an example of the configuration of reference signal 601 of Fig. 6 included in communication modulated signal 501 of Fig. 5C when base station #1 of 301_1 uses the antenna as shown in Fig. 7A in the case of "the configuration of base station #1 of 301_1 explained using Figs. 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0238] As shown in FIG. 8A, the reference signal 601 includes, for example, a communication reference signal 801 and a wireless power transmission reference signal 802.

[0239] Then, the communication reference signal 801 is transmitted from base station #1 of 301_1 using "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" shown in Figure 7A.

[0240] In addition, the reference signal 802 for wireless power transmission is transmitted from base station #1 at 301_1 using "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" shown in Figure 7A.

[0241] Then, terminal #2 of 302_2, which is the counterpart of base station #1 of 301_1, will perform reception beamforming on modulated signal for communication 501 using reference signal for communication 801.

[0242] Furthermore, terminal #2 of 302_2 uses the wireless power transmission reference signal 802 to perform reception beamforming on the wireless power transmission signal 502.

[0243] Therefore, the terminal performs receive beamforming during wireless power transmission in addition to the receive beamforming (receive directivity control) performed in conjunction with the communication reception operation, thereby receiving the wireless power transmission signal transmitted by the base station and charging, thereby achieving the effect of reducing the consumption of the remaining battery power.

[0244] If the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, the wireless power transmission reference signal 802 in FIG. 8A will not be transmitted.

[0245] Therefore, base station #1 of 301_1 transmits a communication modulated signal 501, and when not transmitting a wireless power transmission signal 502, it uses "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7," and when transmitting a wireless power transmission signal 502, it uses "antenna #0 of 710_0, ..., antenna #31 of 710_31."

[0246] Then, base station #1 of 301_1 transmits a communication modulated signal 501, and therefore, when not transmitting a wireless power transmission signal 502, it transmits a communication reference signal 801 using "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7," and when transmitting a wireless power transmission signal 502, it transmits a wireless power transmission reference signal 802 using, for example (this is just an example), "antenna #0 of 710_0, ..., antenna #31 of 710_31."

[0247] Fig. 8B shows another example of the configuration of the reference signal. For example, Fig. 8B shows an example of the configuration of reference signal 601 of Fig. 6 included in communication modulated signal 501 of Fig. 5C when base station #1 of 301_1 uses the antenna as shown in Fig. 7B in the case of "the configuration of base station #1 of 301_1 described using Figs. 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0248] As shown in FIG. 8B, the reference signal 601 includes, for example, a communication reference signal 801 and a communication and wireless power transmission reference signal 803.

[0249] Then, the communication reference signal 801 is transmitted from base station #1 of 301_1 using "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" shown in Figure 7B.

[0250] In addition, the reference signal 803 for communication and wireless power transmission is transmitted from base station #1 of 301_1 using "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" shown in Figure 7B.

[0251] Terminal #2 of 302_2, which is the counterpart of base station #1 of 301_1, will perform reception beamforming on modulated signal for communication 501 using reference signal for communication 801 and reference signal for communication and wireless power transmission 803.

[0252] Furthermore, terminal #2 of 302_2 will perform reception beamforming for the signal for wireless power transmission 502 using the reference signal for communication and wireless power transmission 803.

[0253] Therefore, the terminal performs receive beamforming (receive directivity control) in conjunction with the communication reception operation, thereby receiving the wireless power transmission signal transmitted by the base station and charging, thereby achieving the effect of reducing the consumption of the remaining battery power.

[0254] Therefore, even when the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, it will transmit the communication reference signal 801 and the communication and wireless power transmission reference signal 803 in FIG. 8B.

[0255] Therefore, in order to transmit the communication modulated signal 501, base station #1 of 301_1 will use "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" whether or not the base station #1 is transmitting the wireless power transmission signal 502.

[0256] Then, in order to transmit the modulated signal for communication 501, base station #1 of 301_1 uses "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" to transmit the reference signal for communication 801 and the reference signal for communication and wireless power transmission 803, whether or not the base station #1 is transmitting the modulated signal for communication 501.

[0257] Fig. 8C shows another example of the configuration of the reference signal. For example, Fig. 8C shows an example of the configuration of reference signal 601 of Fig. 6 included in communication modulated signal 501 of Fig. 5C when base station #1 of 301_1 uses the antenna as shown in Fig. 7C in the case of "the configuration of base station #1 of 301_1 explained using Figs. 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0258] As shown in FIG. 8C, the reference signal 601 includes, for example, a reference signal for communication 801, a reference signal for communication and wireless power transmission 803, and a reference signal for wireless power transmission 802.

[0259] Then, the communication reference signal 801 is transmitted from base station #1 of 301_1 using "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" shown in Figure 7C.

[0260] In addition, the reference signal 803 for communication and wireless power transmission is transmitted from base station #1 of 301_1 using "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" shown in Figure 7C.

[0261] Then, the wireless power transmission reference signal 802 is transmitted from the base station #1 301_1 using "antenna #16 of 710_16, antenna #17 of 710_17, ..., antenna #31 of 710_31" shown in FIG. 7C.

[0262] Then, terminal #2 of 302_2, which is the counterpart of base station #1 of 301_1, will perform receive beamforming on communication modulated signal 501 using communication reference signal 801 and communication and wireless power transmission reference signal 803.

[0263] Furthermore, terminal #2 of 302_2 performs reception beamforming for the signal for wireless power transmission 502 using the reference signal for communication and wireless power transmission 803 and the reference signal for wireless power transmission 802.

[0264] Therefore, the terminal performs receive beamforming during wireless power transmission in addition to the receive beamforming (receive directivity control) performed in conjunction with the communication reception operation, thereby receiving the wireless power transmission signal transmitted by the base station and charging, thereby achieving the effect of reducing the consumption of the remaining battery power.

[0265] Therefore, when the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, the base station #1 does not transmit the wireless power transmission reference signal 802 in FIG. 8C.

[0266] Therefore, in order to transmit the communication modulated signal 501, base station #1 of 301_1 will use "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" whether or not the base station #1 is transmitting the wireless power transmission signal 502.

[0267] Then, in order to transmit the modulated signal for communication 501, base station #1 of 301_1 uses "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" to transmit the reference signal for communication 801 and the reference signal for communication and wireless power transmission 803, whether or not the base station #1 is transmitting the modulated signal for communication 501.

[0268] Although Figures 7A, 7B, and 7C have been described as examples of how to use antennas, the way to use antennas is not limited to these examples, and the number of antennas for transmitting communication modulated signals, the arrangement of the antennas, the number of antennas for transmitting wireless power transmission signals, and the arrangement of the antennas can be set in any way and can be implemented in the same way.

[0269] Furthermore, the methods of configuring the reference signal for communication, the reference signal for wireless power transmission, and the reference signal for both communication and wireless power transmission are not limited to the examples in Figures 8A, 8B, and 8C. For example, the reference signal for communication, the reference signal for wireless power transmission, and the reference signal for both communication and wireless power transmission may be arranged in any manner.

[0270] 8A, 8B, and 8C show the configuration of a reference signal included in a modulated signal for communication, where a reference signal related to wireless power transmission is included in the modulated signal for communication. (This allows a terminal to perform unified reception beamforming during communication and charging by wireless power transmission, simplifies control signals for synchronization and procedures, and improves data throughput and frequency usage efficiency.) However, the same implementation is also possible even if the reference signal related to wireless power transmission is not included in the modulated signal for communication, but is transmitted separately.

[0271] Next, in Fig. 3C, an example will be described in which base station #1 of 301_1 and base station #2 of 301_2 transmit a wireless power transmission signal 502 and a communication modulation signal 501 to terminal #2 of 302_2, which is a "terminal capable of charging and communication," as shown in Fig. 5C. Note that in Fig. 3C, base station #1 of 301_1 transmits the wireless power transmission signal 502, and base station #2 of 301_2 transmits the communication modulation signal 501.

[0272] Also, if "base station #1 of 301_1 and base station #2 of 301_2" are considered as TRPs, then "base station #1 of 301_1 and base station #2 of 301_2" and terminal #2 of 302_2 realize multiple TRPs.

[0273] As shown in Fig. 6, it is assumed that communication modulated signal 501 in Fig. 5C includes, for example, reference signal 601, data symbol 602, and control information symbol 603. Note that the configuration of communication modulated signal 501 is not limited to the configuration in Fig. 6. For example, communication modulated signal 501 may exist at multiple frequencies and / or at multiple times. Furthermore, communication modulated signal 501 may include other symbols and signals.

[0274] The reference signal may be, for example, a known symbol modulated using PSK modulation in the transmitter / receiver (or the receiver may be able to know the symbol transmitted by the transmitter by synchronizing), a non-zero power signal, a zero power signal, a signal known in the transmitter / receiver, etc., and the receiver uses these signals to perform "frequency synchronization," "time synchronization, channel estimation (CSI estimation) (for each modulated signal)," "signal detection," "estimation of the reception state," "estimation of the transmission state," "phase tracking based on phase noise, etc.," "estimation (of channel, etc. conditions) for performing transmit beamforming and / or receive beamforming," etc.

[0275] 9A1 and 9A2 show an example of an antenna-related configuration in base station #2 of 301_2.

[0276] 9A1 and 9A2 show, as an example, a case where base station #2 of 301_2 is equipped with 32 antennas. However, Figures 9A1 and 9A2 are merely examples, and the number of antennas equipped in base station #2 of 301_2 is not limited to 32. Also, in Figures 9A1 and 9A2, the same elements as those in Figure 7A etc. are assigned the same numbers.

[0277] For example, as shown in FIG. 9A1, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" are antennas used by base station #2 of 301_2 to transmit communication modulated signal 501 of FIG. 5C.

[0278] "Antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" may be antennas used by base station #2 of 301_2 to transmit the communication modulated signal 501 in Figure 5C, or may be antennas used to transmit the wireless power transmission signal 502.

[0279] FIG. 9A2 is an example different from FIG. 9A1. As shown in Figure 9A2, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas used by base station #2 of 301_2 to transmit communication modulated signal 501 of Figure 5C.

[0280] In the case of FIG. 9A2, the base station #2 of 301_2 does not need to have the function of transmitting the signal for wireless power transmission 502.

[0281] For example, as shown in FIG. 9B1, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas used by base station #1 of 301_1 to transmit wireless power transmission signal 502 of FIG. 5C.

[0282] "Antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" may be antennas used by base station #1 of 301_1 to transmit the communication modulated signal 501 in Figure 5C, or may be antennas used to transmit the wireless power transmission signal 502.

[0283] FIG. 9B2 is an example different from FIG. 9B1. As shown in Figure 9B2, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas used by base station #1 of 301_1 to transmit wireless power transmission signal 502 of Figure 5C.

[0284] In the case of FIG. 9B2, base station #1 of 301_1 does not need to have the function of transmitting communication modulated signal 501.

[0285] FIG. 8A shows an example of the configuration of reference signal 601 of FIG. 6 included in communication modulated signal 501 of FIG. 5C when base station #1 of 301_1 uses an antenna as shown in FIG. 9B1 or 9B2, and base station #2 of 301_2 uses an antenna as shown in FIG. 9A1 or 9A2.

[0286] As shown in FIG. 8A, the reference signal 601 includes, for example, a communication reference signal 801 and a wireless power transmission reference signal 802.

[0287] Then, the communication reference signal 801 is transmitted from base station #2 of 301_2 using the antenna "used when transmitting a communication modulated signal" shown in Figure 9A1 or the antenna "used when transmitting a communication modulated signal" shown in Figure 9A2.

[0288] In addition, the wireless power transmission reference signal 802 is transmitted from base station #1 of 301_1 using the antenna "used when transmitting a wireless power transmission signal" shown in Figure 9B1 or the antenna "used when transmitting a wireless power transmission signal" shown in Figure 9B2.

[0289] Then, the terminal #2 of 302_2, which is the counterpart of the base station #1 of 301_1 and the base station #2 of 301_2, uses the communication reference signal 801 to perform reception beamforming on the communication modulated signal 501.

[0290] Furthermore, terminal #2 of 302_2 uses the wireless power transmission reference signal 802 to perform reception beamforming on the wireless power transmission signal 502.

[0291] Therefore, the terminal performs receive beamforming during wireless power transmission in addition to the receive beamforming (receive directivity control) performed in conjunction with the communication reception operation, thereby receiving the wireless power transmission signal transmitted by the base station and charging, thereby achieving the effect of reducing the consumption of the remaining battery power.

[0292] If the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, the wireless power transmission reference signal 802 in FIG. 8A will not be transmitted.

[0293] Since base station #2 of 301_2 transmits a communication modulated signal 501, when base station #1 of 301_1 does not transmit a wireless power transmission signal 502, it transmits a communication reference signal 801 using the antenna "used when transmitting a communication modulated signal" shown in FIG. 9A1 or the antenna "used when transmitting a communication modulated signal" shown in FIG. 9A2, and when base station #1 of 301_1 transmits a wireless power transmission signal 502, it transmits a wireless power transmission reference signal 802 using the antenna "used when transmitting a wireless power transmission signal" shown in FIG. 9B1 or the antenna "used when transmitting a wireless power transmission signal" shown in FIG. 9B2.

[0294] 9A1, 9A1, 9B1, and 9B2 have been described as examples of how to use antennas, but the way to use antennas is not limited to these examples, and the number of antennas for transmitting modulated signals for communication, the arrangement of the antennas, the number of antennas for transmitting wireless power transmission signals, and the arrangement of the antennas can be set in any way and can be implemented in the same way.

[0295] Furthermore, the method of configuring the reference signal for communication, the reference signal for wireless power transmission, and the reference signal for both communication and wireless power transmission is not limited to the example of Figure 8A, and for example, the reference signal for communication and the reference signal for wireless power transmission may be arranged in any manner.

[0296] 8A shows the configuration of a reference signal included in a modulated signal for communication, where a reference signal related to wireless power transmission is included in the modulated signal for communication (this allows a terminal to perform unified reception beamforming during communication and charging by wireless power transmission, simplifies control signals for synchronization and procedures, and improves data throughput and frequency usage efficiency). However, it is also possible to similarly implement the reference signal related to wireless power transmission even if it is not included in the modulated signal for communication and is transmitted separately.

[0297] In Figure 3A, we will explain an example in which base station #1, 301_1, transmits a wireless power transmission signal 502 and a communication modulation signal 501 to terminal #2, 302_2, which is a ``terminal capable of charging and communication'', as shown in Figure 5C.

[0298] As shown in Fig. 6, it is assumed that communication modulated signal 501 in Fig. 5C includes, for example, reference signal 601, data symbol 602, and control information symbol 603. Note that the configuration of communication modulated signal 501 is not limited to the configuration in Fig. 6. For example, communication modulated signal 501 may exist at multiple frequencies and / or at multiple times. Furthermore, communication modulated signal 501 may include other symbols and signals.

[0299] The control information symbol 603 includes information on transmission parameters such as the "frequency to be used, frequency bandwidth (number of carriers), number of signal streams, and MCS (Modulation and Coding Scheme)" of the signal transmitted by the base station, and the "number of antennas, antenna information, and timing" for transmitting the signal.

[0300] FIG. 7A shows an example of an antenna-related configuration in the "configuration of base station #1 of 301_1 described using FIGS. 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0301] 7A shows an example in which base station #1 of 301_1 is equipped with 32 antennas. However, FIG. 7A is an example, and the number of antennas equipped in base station #1 of 301_1 is not limited to 32.

[0302] For example, as shown in Figure 7A, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" are antennas that base station #1 301_1 uses to transmit communication modulated signal 501 in Figure 5C. However, there may be exceptions. This will be explained later.

[0303] Also, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas that base station #1 of 301_1 uses to transmit the wireless power transmission signal 502 in Fig. 5C. However, there may be exceptions.

[0304] Figure 7B shows an example of the antenna-related configuration different from that shown in Figure 7A in the "configuration of base station #1 of 301_1 described using Figures 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0305] In Figure 7B, the same elements as in Figure 7A are assigned the same numbers. As an example, a case is shown in which base station #1 301_1 is equipped with 32 antennas. However, Figure 7B is an example, and the number of antennas equipped in base station #1 301_1 is not limited to 32.

[0306] For example, as shown in FIG. 7B, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 301_1 to transmit communication modulated signal 501 shown in FIG. 5C. However, there may be exceptions. This will be explained later.

[0307] Also, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas that base station #1 of 301_1 uses to transmit the wireless power transmission signal 502 in Fig. 5C. However, there may be exceptions.

[0308] Therefore, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 of 301_1 to transmit communication modulated signal 501 and wireless power transmission signal 502 in Figure 5C.

[0309] Figure 7C shows an example of the antenna-related configuration different from that shown in Figures 7A and 7B in the "configuration of base station #1 of 301_1 described using Figures 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0310] In Figure 7C, the same elements as in Figure 7A are assigned the same numbers. As an example, a case is shown in which base station #1 301_1 is equipped with 32 antennas. However, Figure 7C is an example, and the number of antennas equipped in base station #1 301_1 is not limited to 32.

[0311] For example, as shown in Figure 7C, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 301_1 to transmit communication modulated signal 501 in Figure 5C. However, there may be exceptions. This will be explained later.

[0312] Also, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas that base station #1 of 301_1 uses to transmit the wireless power transmission signal 502 in Fig. 5C. However, there may be exceptions.

[0313] Therefore, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" are antennas used by base station #1 of 301_1 to transmit communication modulated signal 501 and wireless power transmission signal 502 in Figure 5C.

[0314] 10 shows an example of the configuration of control information symbol 603 of FIG. 6 included in communication modulated signal 501 of FIG. 5C when base station #1 of 301_1 uses the antenna as shown in FIG. 7A in the case of "the configuration of base station #1 of 301_1 explained using FIGS. 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H."

[0315] 10, the control information symbol 603 includes, for example, communication modulation signal transmission parameter information 1001 and wireless power transmission signal transmission parameter information 1002. The transmission parameter information has already been described.

[0316] For example, the communication modulation signal transmission parameter information 1001 is transmitted from base station #1 of 301_1 using "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" shown in FIG. 7A.

[0317] Also, for example, the signal transmission parameter information 1002 for wireless power transmission is transmitted from base station #1 at 301_1 using "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" shown in FIG. 7A.

[0318] Then, terminal #2 of 302_2, which is the counterpart of base station #1 of 301_1, obtains communication modulation signal transmission parameter information 1001, and performs processing such as demodulation on the data symbols based on this information to obtain data.

[0319] Furthermore, terminal #2 of 302_2 obtains the wireless power transmission signal transmission parameter information 1002 and performs charging using the wireless power transmission signal 502.

[0320] This provides the effect that the terminal is capable of communication and charging.

[0321] If the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, the transmission parameter information 1002 for the wireless power transmission signal in FIG. 10 will not be transmitted.

[0322] Therefore, base station #1 of 301_1 transmits a communication modulated signal 501, and when not transmitting a wireless power transmission signal 502, it uses "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7," and when transmitting a wireless power transmission signal 502, it uses "antenna #0 of 710_0, ..., antenna #31 of 710_31."

[0323] Another example will be described. Figure 10 shows an example of the configuration of control information symbol 603 of Figure 6 included in communication modulated signal 501 of Figure 5C when base station #1 of 301_1 uses an antenna as shown in Figure 7B in the case of "the configuration of base station #1 of 301_1 explained using Figures 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H." Note that since Figure 10 has already been explained, its explanation will be omitted.

[0324] For example, the communication modulated signal transmission parameter information 1001 is transmitted from base station #1 of 301_1 using "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" shown in FIG. 7B.

[0325] In addition, the signal transmission parameter information 1002 for wireless power transmission is transmitted from base station #1 of 301_1 using "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" shown in Figure 7B.

[0326] Then, terminal #2 of 302_2, which is the counterpart of base station #1 of 301_1, obtains communication modulation signal transmission parameter information 1001, and performs processing such as demodulation on the data symbols based on this information to obtain data.

[0327] Furthermore, terminal #2 of 302_2 obtains the wireless power transmission signal transmission parameter information 1002 and performs charging using the wireless power transmission signal 502.

[0328] This provides the effect that the terminal is capable of communication and charging.

[0329] If the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, the transmission parameter information 1002 for the wireless power transmission signal in FIG. 10 will not be transmitted.

[0330] Therefore, in order to transmit the communication modulated signal 501, base station #1 of 301_1 will use "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" whether or not the base station #1 is transmitting the wireless power transmission signal 502.

[0331] Another example will be described. Figure 10 shows an example of the configuration of control information symbol 603 of Figure 6 included in communication modulated signal 501 of Figure 5C when base station #1 of 301_1 uses an antenna as shown in Figure 7C in the case of "the configuration of base station #1 of 301_1 explained using Figures 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H." Note that since Figure 10 has already been explained, its explanation will be omitted.

[0332] For example, the communication modulated signal transmission parameter information 1001 is transmitted from base station #1 of 301_1 using "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" shown in FIG. 7C.

[0333] In addition, the signal transmission parameter information 1002 for wireless power transmission is transmitted from base station #1 of 301_1 using "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, antenna #17 of 710_17, ..., antenna #31 of 710_31" shown in Figure 7C.

[0334] Then, terminal #2 of 302_2, which is the counterpart of base station #1 of 301_1, obtains communication modulation signal transmission parameter information 1001, and performs processing such as demodulation on the data symbols based on this information to obtain data.

[0335] Furthermore, terminal #2 of 302_2 obtains the wireless power transmission signal transmission parameter information 1002 and performs charging using the wireless power transmission signal 502.

[0336] This provides the effect that the terminal is capable of communication and charging.

[0337] If the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, the transmission parameter information 1002 for the wireless power transmission signal in FIG. 10 will not be transmitted.

[0338] Therefore, in order to transmit the communication modulated signal 501, base station #1 of 301_1 will use "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, and antenna #15 of 710_15" whether or not the base station #1 is transmitting the wireless power transmission signal 502.

[0339] 7A, 7B, and 7C have been described as examples of how to use antennas, but the way to use antennas is not limited to these examples, and the number of antennas for transmitting modulated signals for communication, the arrangement of the antennas, and the number of antennas for transmitting wireless power transmission signals, and the arrangement of the antennas can be set in any way and can be implemented in the same way.

[0340] Furthermore, the configuration method of the modulation signal transmission parameter information for communication 1001 and the signal transmission parameter information for wireless power transmission 1002 is not limited to the example of Figure 10, and for example, the modulation signal transmission parameter information for communication 1001 and the signal transmission parameter information for wireless power transmission 1002 may be arranged in any manner.

[0341] 10 shows the configuration of control information symbols included in the modulated signal for communication, and illustrates a case where transmission parameter information related to wireless power transmission is included in the modulated signal for communication. (This allows the terminal to obtain transmission parameter information for communication and charging by wireless power transmission in a unified manner, simplifies control signals for synchronization and procedures, and enables improvements in data throughput and frequency usage efficiency.) However, it is also possible to implement the same method even if the transmission parameter information related to wireless power transmission is not included in the modulated signal for communication, but is transmitted separately.

[0342] Next, in Fig. 3C, an example will be described in which base station #1 of 301_1 and base station #2 of 301_2 transmit a wireless power transmission signal 502 and a communication modulation signal 501 to terminal #2 of 302_2, which is a "terminal capable of charging and communication," as shown in Fig. 5C. Note that in Fig. 3C, base station #1 of 301_1 transmits the wireless power transmission signal 502, and base station #2 of 301_2 transmits the communication modulation signal 501.

[0343] Also, if "base station #1 of 301_1 and base station #2 of 301_2" are considered as TRPs, then "base station #1 of 301_1 and base station #2 of 301_2" and terminal #2 of 302_2 realize multiple TRPs.

[0344] As shown in Fig. 6, it is assumed that communication modulated signal 501 in Fig. 5C includes, for example, reference signal 601, data symbol 602, and control information symbol 603. Note that the configuration of communication modulated signal 501 is not limited to the configuration in Fig. 6. For example, communication modulated signal 501 may exist at multiple frequencies and / or at multiple times. Furthermore, communication modulated signal 501 may include other symbols and signals.

[0345] The control information symbol 603 includes information on transmission parameters such as the "frequency to be used, frequency bandwidth (number of carriers), number of signal streams, and MCS (Modulation and Coding Scheme)" of the signal transmitted by the base station, and the "number of antennas, antenna information, and timing" for transmitting the signal.

[0346] 9A1 and 9A2 show an example of an antenna-related configuration in base station #2 of 301_2.

[0347] 9A1 and 9A2 show, as an example, a case where base station #2 of 301_2 is equipped with 32 antennas. However, Figures 9A1 and 9A2 are merely examples, and the number of antennas equipped in base station #2 of 301_2 is not limited to 32. Also, in Figures 9A1 and 9A2, the same elements as those in Figure 7A etc. are assigned the same numbers.

[0348] For example, as shown in FIG. 9A1, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" are antennas used by base station #2 of 301_2 to transmit communication modulated signal 501 of FIG. 5C.

[0349] "Antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" may be antennas used by base station #2 of 301_2 to transmit the communication modulated signal 501 in Figure 5C, or may be antennas used to transmit the wireless power transmission signal 502.

[0350] FIG. 9A2 is an example different from FIG. 9A1. As shown in Figure 9A2, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas used by base station #2 of 301_2 to transmit communication modulated signal 501 of Figure 5C.

[0351] In the case of FIG. 9A2, the base station #2 of 301_2 does not need to have the function of transmitting the signal for wireless power transmission 502.

[0352] For example, as shown in FIG. 9B1, "antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas used by base station #1 of 301_1 to transmit wireless power transmission signal 502 of FIG. 5C.

[0353] "Antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, and antenna #7 of 710_7" may be antennas used by base station #1 of 301_1 to transmit the communication modulated signal 501 in Figure 5C, or may be antennas used to transmit the wireless power transmission signal 502.

[0354] FIG. 9B2 is an example different from FIG. 9B1. As shown in Figure 9B2, "antenna #0 of 710_0, antenna #1 of 710_1, antenna #2 of 710_2, antenna #3 of 710_3, antenna #4 of 710_4, antenna #5 of 710_5, antenna #6 of 710_6, antenna #7 of 710_7, antenna #8 of 710_8, antenna #9 of 710_9, antenna #10 of 710_10, antenna #11 of 710_11, antenna #12 of 710_12, antenna #13 of 710_13, antenna #14 of 710_14, antenna #15 of 710_15, antenna #16 of 710_16, ..., antenna #31 of 710_31" are antennas used by base station #1 of 301_1 to transmit wireless power transmission signal 502 of Figure 5C.

[0355] In the case of FIG. 9B2, base station #1 of 301_1 does not need to have the function of transmitting communication modulated signal 501.

[0356] FIG. 10 shows an example of the configuration of control information symbol 603 of FIG. 6 included in communication modulated signal 501 of FIG. 5C when base station #1 of 301_1 uses an antenna as shown in FIG. 9B1 or 9B2, and base station #2 of 301_2 uses an antenna as shown in FIG. 9A1 or 9A2.

[0357] 10, the control information symbol 603 includes, for example, communication modulation signal transmission parameter information 1001 and wireless power transmission signal transmission parameter information 1002. The transmission parameter information has already been described.

[0358] Then, the communication modulated signal transmission parameter information 1001 is transmitted from base station #2 of 301_2 using the antenna "used when transmitting a communication modulated signal" shown in Figure 9A1 or the antenna "used when transmitting a communication modulated signal" shown in Figure 9A2.

[0359] In addition, the wireless power transmission signal transmission parameter information 1002 is transmitted from base station #1 of 301_1 using the antenna "used when transmitting a wireless power transmission signal" shown in Figure 9B1 or the antenna "used when transmitting a wireless power transmission signal" shown in Figure 9B2.

[0360] Then, terminal #2 of 302_2, which is the counterpart of base station #1 of 301_1 and base station #2 of 301_2, obtains communication modulation signal transmission parameter information 1001, and based on this information, performs processing such as demodulation on the data symbols to obtain data.

[0361] Furthermore, terminal #2 of 302_2 obtains the wireless power transmission signal transmission parameter information 1002 and performs charging using the wireless power transmission signal 502.

[0362] This provides the effect that the terminal is capable of communication and charging.

[0363] If the base station #1 of 301_1 does not transmit the wireless power transmission signal 502, the transmission parameter information 1002 for the wireless power transmission signal in FIG. 10 will not be transmitted.

[0364] Since base station #2 of 301_2 transmits communication modulated signal 501, when base station #1 of 301_1 does not transmit wireless power transmission signal 502, it will transmit communication modulated signal transmission parameter information 1001 using the antenna "used when transmitting communication modulated signal" shown in FIG. 9A1 or the antenna "used when transmitting communication modulated signal" shown in FIG. 9A2, and when base station #1 of 301_1 transmits wireless power transmission signal 502, it will transmit wireless power transmission signal transmission parameter information 1002 using the antenna "used when transmitting wireless power transmission signal" shown in FIG. 9B1 or the antenna "used when transmitting wireless power transmission signal" shown in FIG. 9B2.

[0365] 9A1, 9A1, 9B1, and 9B2 have been described as examples of how to use antennas, but the way to use antennas is not limited to these examples, and the number of antennas for transmitting modulated signals for communication, the arrangement of the antennas, the number of antennas for transmitting wireless power transmission signals, and the arrangement of the antennas can be set in any way and can be implemented in the same way.

[0366] Furthermore, the configuration method of the modulation signal transmission parameter information for communication 1001 and the signal transmission parameter information for wireless power transmission 1002 is not limited to the example of Figure 10, and for example, the modulation signal transmission parameter information for communication 1001 and the signal transmission parameter information for wireless power transmission 1002 may be arranged in any manner.

[0367] 10 shows the configuration of control information symbols included in the modulated signal for communication, and illustrates a case where transmission parameter information related to wireless power transmission is included in the modulated signal for communication. (This allows the terminal to obtain transmission parameter information for communication and charging by wireless power transmission in a unified manner, simplifies control signals for synchronization and procedures, and enables improvements in data throughput and frequency usage efficiency.) However, it is also possible to implement the same method even if the transmission parameter information related to wireless power transmission is not included in the modulated signal for communication, but is transmitted separately.

[0368] In the above description, the base station may perform transmission beamforming (transmission directivity control) when the base station and terminal are in the states shown in Figures 3A and 3C. The transmission beamforming will be briefly described below.

[0369] FIG. 11A shows a first example of communication between a terminal and a base station, with the horizontal axis representing time.

[0370] For example, the terminal transmits a reference signal 1101_A.

[0371] The base station receives the reference signal 1101_A and estimates, for example, the channel state. Based on the channel state, the base station determines a transmission beamforming method (direction of directivity and specific processing for directivity control).

[0372] The base station performs transmit beamforming and transmits modulated signals for communication and / or signals for wireless power transmission.

[0373] 11A, the signal is referred to as a reference signal, but the term is not limited to this and may be called, for example, a beacon, a signal, a symbol, etc. The configuration of a base station compatible with transmit beamforming has already been explained, and therefore will not be explained here.

[0374] When a base station performs transmit beamforming as shown in Figure 11A, it is preferable that the "frequency used by the signal transmitted by the base station" and the "frequency used by the signal transmitted by the terminal" are the same or partially the same.

[0375] FIG. 11B shows a second example of communication between a terminal and a base station, with the horizontal axis representing time.

[0376] For example, the base station transmits a reference signal 1151_B.

[0377] The terminal then receives the reference signal 1151_B and estimates, for example, the channel state. The terminal then transmits, to the base station, information necessary for the base station to perform transmit beamforming (for example, information on the estimated channel state, etc.) (1102_B).

[0378] The base station receives the information (1102_B) transmitted by the terminal and determines the transmission beamforming method (direction of directivity, specific processing of directivity control).

[0379] The base station performs transmit beamforming and transmits modulated signals for communication and / or signals for wireless power transmission.

[0380] 11B, the signal is referred to as a reference signal, but the term is not limited to this and may be called, for example, a beacon, a signal, a symbol, etc. The configuration of a base station compatible with transmit beamforming has already been explained, and therefore will not be explained here.

[0381] Below, an example will be described that differs from the states of the base station and terminals shown in FIGS. 3A and 3C.

[0382] Fig. 12A shows an example of the relationship between a base station and a terminal. Fig. 12A shows an example of the relationship between a "base station, which is an example of a 'power transmission and communication device' having the configurations shown in Figs. 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H," and a terminal, which is an example of a device that receives a signal for power transmission transmitted by the "power transmission and / or communication device" and charges a battery.

[0383] Although the term "base station" is used here, the same implementation is possible even if the base station is implemented as a "TRP." Therefore, although the term "base station" will be used in the following explanation, it is possible to replace it with a "TRP."

[0384] The base station #1 of 301_1 transmits power wirelessly to the terminal #2 of 302_2. The base station #2 of 301_2 transmits power wirelessly to the terminal #2 of 302_2.

[0385] 12A, the base station #1 of 301_1 and the base station #2 of 301_2 are assumed to have at least a function of wireless power transmission. Note that the configurations of the base station #1 of 301_1 and the base station #2 of 301_2 have already been described, and therefore will not be described again.

[0386] FIG. 12B shows an example of the configuration of terminal #2 of 302_2 in FIG. 12A.

[0387] Interface unit 1200B receives signal 1201B as input and outputs signal 1202B. Interface unit 1200B is also connected to multiple components such as "charging function unit 1 of 1211B_1, ..., charging function unit U of 1211B_U," communication function unit 1221B, and control unit 1290B. U is an integer of 1 or 2 or more, and terminal #2 of 302_2 is equipped with multiple charging function units.

[0388] Then, "charging unit 1 of 1211B_1, ..., charging unit U of 1211B_U," communication function unit 1221B, and control unit 1290B exchange data with each part via interface unit 1200B.

[0389] The charging function unit i of 1211B_i is connected to the antenna unit i of 1212B_i, and for example, the charging function unit i of 1211B_i inputs a signal received by the antenna unit i of 1212B_i to charge a battery. Note that the specific method of charging a battery by wireless power transmission and the specific device configuration have been explained using "Figures 2A, 2B, 2E, 2F, 2G, 2H," etc., and therefore detailed explanations will be omitted. Furthermore, i is an integer between 1 and U.

[0390] The feature of Fig. 12B is that "terminal #2 of 302_2 in Fig. 12A can operate a plurality of charging function units among charging function units i of 1211B_i." Each charging function unit may be equipped with a battery, and terminal #2 of 302_2 may be equipped with one or two or more batteries.

[0391] Fig. 12C shows an example of the configuration of terminal #2 of 302_2 in Fig. 12A that is different from Fig. 12B. Note that in Fig. 12C, the same components as those in Fig. 12B are given the same numbers, and as they have already been explained, some explanations will be omitted.

[0392] The interface unit 1200B receives a signal 1201B as an input and outputs a signal 1202B. The interface unit 1200B is also connected to a plurality of parts such as the charging function unit 1211B_1, the communication function unit 1221B, and the control unit 1290B.

[0393] The "charging function unit 1 of 1211B_1, communication function unit 1221B, and control unit 1290B" exchange data with each unit via the interface unit 1200B.

[0394] The charging function unit 1 of 1211B_1 is connected to "antenna unit 1_1 of 1213C_1_1, ..., antenna unit 1_V1 of 1213C_1_V1." For example, the charging function unit 1 of 1211B_1 inputs signals received by multiple antenna units among "antenna unit 1_1 of 1213C_1_1, ..., antenna unit 1_V1 of 1213C_1_V1" to charge the battery. Note that the specific method of charging a battery by wireless power transmission and the specific device configuration have been explained using "Figures 2A, 2B, 2E, 2F, 2G, 2H," etc., and therefore detailed explanations will be omitted. Furthermore, V1 is an integer of 2 or greater.

[0395] The feature of Fig. 12C is that "terminal #2 of 302_2 in Fig. 12A can operate multiple antenna units among "antenna unit 1_1 of 1213C_1_1, ..., antenna unit 1_V1 of 1213C_1_V1" and charge the battery." Terminal #2 of 302_2 may be equipped with one or two or more batteries.

[0396] Fig. 12D shows an example of the configuration of terminal #2 of 302_2 in Fig. 12A that is different from Fig. 12B and Fig. 12C. Note that in Fig. 12D, the same elements as those in Fig. 12B are given the same numbers, and as they have already been explained, some explanations will be omitted.

[0397] Interface unit 1200B receives signal 1201B as input and outputs signal 1202B. Interface unit 1200B is also connected to multiple components such as "charging function unit 1 of 1211B_1, ..., charging function unit U of 1211B_U," communication function unit 1221B, and control unit 1290B. U is an integer equal to or greater than 2, and terminal #2 of 302_2 is equipped with multiple charging function units.

[0398] Then, "charging unit 1 of 1211B_1, ..., charging unit U of 1211B_U," communication function unit 1221B, and control unit 1290B exchange data with each part via interface unit 1200B.

[0399] The charging function unit k of 1211B_k is connected to "antenna unit k_1 of 1213D_k_1, ..., antenna unit k_Vk of 1213D_k_Vk." For example, the charging function unit k of 1211B_k inputs signals received by multiple antenna units among "antenna unit k_1 of 1213D_k_1, ..., antenna unit k_Vk of 1213D_k_Vk" to charge the battery. Note that the specific method of charging a battery by wireless power transmission and the specific device configuration have been explained using "Figures 2A, 2B, 2E, 2F, 2G, 2H," etc., and therefore detailed explanations will be omitted. Furthermore, Vk is an integer equal to or greater than 2, and k is an integer equal to or greater than 1 and equal to or less than U.

[0400] The features of Fig. 12D are that "terminal #2 of 302_2 in Fig. 12A can operate multiple charging function units among charging function units k of 1211B_k" and "terminal #2 of 302_2 in Fig. 12A can operate multiple antenna units among "antenna unit k_1 of 1213D_k_1, ..., antenna unit k_Vk of 1213D_k_Vk" and charge the battery." Note that each charging function unit may be equipped with a battery, and terminal #2 of 302_2 may be equipped with one or two or more batteries.

[0401] The configuration of terminal #2 of 302_2 in Fig. 12A has been described using Fig. 12B, Fig. 12C, and Fig. 12D. Hereinafter, the description will be centered on the operation of base station #1 of 301_1 and base station #2 of 301_2 in Fig. 12A. Note that the configuration of "base station #1 of 301_1 and base station #2 of 301_2" has been described using "Figs. 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H," so description thereof will be omitted.

[0402] Fig. 13A1 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13A1, the horizontal axis represents time and the vertical axis represents frequency.

[0403] Fig. 13A2 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13A2, the horizontal axis represents time and the vertical axis represents frequency.

[0404] As shown in Figures 13A1 and 13A2, "wireless power transmission signal 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at frequency AA1 and time A1.

[0405] In other words, "wireless power transmission signal 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency and the same (common) time.

[0406] Therefore, the (downlink) SDM (Spatial Division Multiplexing) method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0407] In the case where the base station is a TRP, it is specifically implementing a (downlink) SDM method for signals for wireless power transmission by multiple TRPs.

[0408] Although the method is named "(downlink) SDM method for wireless power transmission signals" here, the name is not limited to this, and the important point is that it is implemented as described above.

[0409] Terminal #2 at 302_2 in Fig. 12A charges its battery by receiving "signal 1301A_1 for wireless power transmission transmitted by base station #1 at 301_1 and addressed to terminal #2 at 302_2" and "signal 1301A_2 for wireless power transmission transmitted by base station #2 at 301_2 and addressed to terminal #2 at 302_2" in Fig. 13A1 and Fig. 13A2. The detailed operation will be described later.

[0410] Another example of the "(Downlink) SDM method for wireless power transmission signals" will now be described.

[0411] Fig. 13A3 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13A3, the horizontal axis represents time and the vertical axis represents frequency.

[0412] Fig. 13A4 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13A4, the horizontal axis represents time and the vertical axis represents frequency.

[0413] 13A3 and 13A4, "a wireless power transmission signal 1301A_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" and "a wireless power transmission signal 1301A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" exist at the frequency AA1 and the time A1. Note that "a wireless power transmission signal 1301A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" also exists at times other than the time A1.

[0414] In other words, "wireless power transmission signal 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency and the same (common) time.

[0415] Therefore, the (downlink) SDM method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0416] In the case where the base station is a TRP, it is specifically implementing a (downlink) SDM method for signals for wireless power transmission by multiple TRPs.

[0417] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1301A_1 for wireless power transmission transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "signal 1301A_2 for wireless power transmission transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" in Fig. 13A3 and Fig. 13A4. The detailed operation will be described later.

[0418] Fig. 13A5 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13A5, the horizontal axis represents time and the vertical axis represents frequency.

[0419] Fig. 13A6 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13A6, the horizontal axis represents time and the vertical axis represents frequency.

[0420] 13A5 and 13A6, "a wireless power transmission signal 1301A_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" and "a wireless power transmission signal 1301A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" exist at the frequency AA1 and the time A1. Note that "a wireless power transmission signal 1301A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" also exists at times other than the time A1.

[0421] In other words, "wireless power transmission signal 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency and the same (common) time.

[0422] Therefore, the (downlink) SDM method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0423] In the case where the base station is a TRP, it is specifically implementing a (downlink) SDM method for signals for wireless power transmission by multiple TRPs.

[0424] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1301A_1 for wireless power transmission transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "signal 1301A_2 for wireless power transmission transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" in Fig. 13A5 and Fig. 13A6. Note that detailed operations will be described later.

[0425] Fig. 13A7 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13A7, the horizontal axis represents time and the vertical axis represents frequency.

[0426] Fig. 13A8 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13A8, the horizontal axis represents time and the vertical axis represents frequency.

[0427] 13A7 and 13A8, "a wireless power transmission signal 1301A_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" and "a wireless power transmission signal 1301A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" exist at the frequency AA1 and the time A1. Note that "a wireless power transmission signal 1301A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" also exists at a time other than the time A1. Furthermore, "a wireless power transmission signal 1301A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" also exists at a frequency other than the frequency AA1.

[0428] In other words, "wireless power transmission signal 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency and the same (common) time.

[0429] Therefore, the (downlink) SDM method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0430] In the case where the base station is a TRP, it is specifically implementing a (downlink) SDM method for signals for wireless power transmission by multiple TRPs.

[0431] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1301A_1 for wireless power transmission transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "signal 1301A_2 for wireless power transmission transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" in Fig. 13A7 and Fig. 13A8. Note that detailed operations will be described later.

[0432] Fig. 13A9 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13A9, the horizontal axis represents time and the vertical axis represents frequency.

[0433] Fig. 13A10 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13A10, the horizontal axis represents time and the vertical axis represents frequency.

[0434] 13A9 and 13A10, "a wireless power transmission signal 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "a wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at frequency AA1 and time A1. Note that "a wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" also exists at times other than time A1. Furthermore, "a wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" also exists at frequencies other than AA1.

[0435] In other words, "wireless power transmission signal 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency and the same (common) time.

[0436] Therefore, the (downlink) SDM method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0437] In the case where the base station is a TRP, it is specifically implementing a (downlink) SDM method for signals for wireless power transmission by multiple TRPs.

[0438] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1301A_1 for wireless power transmission transmitted by base station #1 of 301_1 to terminal #2 of 302_2" and "signal 1301A_2 for wireless power transmission transmitted by base station #2 of 301_2 to terminal #2 of 302_2" in Fig. 13A9 and Fig. 13A10. Note that detailed operations will be described later.

[0439] The arrangement on the time axis and frequency axis of "signal for wireless power transmission 1301A_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "signal for wireless power transmission 1301A_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" is shown in "Figs. 13A1, 13A2", "Figs. 13A3, 13A4", "Figs. 13A5, 13A6", "Figs. 13A7, 13A8", "Figs. 13A9, 13A10", "Figs. 13A11, 13A12", "Figs. 13A13, 13A14", "Figs. 13A15, 13A16", "Figs. 13A17, 13A18", "Figs. 13A19, 13A19", "Figs. 13A20, 13A21", "Figs. 13A21, 13A22", "Figs. 13A22, 13A23", "Figs. 13A24, 13A24", "Figs. 13A25, 13A26", "Figs. 13A27, 13A28", "Figs. 13A29, 13A29", "Figs. 13A21, 13A21", "Figs. 13A22, 13A23", "Figs. 13A24, 13A25", "Figs. 13A26, 13A27", "Figs. 13A28, 13A29", "Figs. 13A29, 13A30", "Figs. 13A The present invention is not limited to the example of "signal 1301A_1 for wireless power transmission addressed to terminal #2 of 302_2 transmitted by base station #1 of 301_1" and "signal 1301A_2 for wireless power transmission addressed to terminal #2 of 302_2 transmitted by base station #2 of 301_2" but can be implemented in the same way regardless of the arrangement as long as "signal 1301A_1 for wireless power transmission addressed to terminal #2 of 302_2 transmitted by base station #1 of 301_1 and signal 1301A_2 for wireless power transmission addressed to terminal #2 of 302_2 transmitted by base station #2 of 301_2" exist at the same (common) frequency and the same (common) time."

[0440] Also, in Figure 12A, for example, two base stations or two TRPs transmit signals for wireless power transmission using the SDM method, and terminal #2 of 302_2 obtains signals for wireless power transmission from two base stations or two TRPs, but two or more base stations or two or more TRPs may transmit signals for wireless power transmission using the SDM method, and terminal #2 of 302_2 may obtain signals for wireless power transmission from two or more base stations or two or more TRPs.

[0441] By implementing the above, the terminal can be efficiently charged, and the effect of being able to charge multiple terminals can be obtained.

[0442] Fig. 13B1 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13B1, the horizontal axis represents time and the vertical axis represents frequency.

[0443] Fig. 13B2 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13B2, the horizontal axis represents time and the vertical axis represents frequency.

[0444] As shown in FIG. 13B1, "a wireless power transmission signal 1301B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" exists at the frequency BB1 and the time B1.

[0445] As shown in FIG. 13B2, a "wireless power transmission signal 1301B_2 transmitted by the base station #2 301_2 and addressed to the terminal #2 302_2" exists at the frequency BB1 and the time B2.

[0446] In other words, "wireless power transmission signal 1301B_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301B_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency but at different times.

[0447] Therefore, the (downlink) TDM (Time Division Multiplexing) method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0448] If the base station is a TRP, it is specifically implementing a (downlink) TDM method for signals for wireless power transmission by multiple TRPs.

[0449] Although the method is called "(downlink) TDM method for wireless power transmission signals" here, the name is not limited to this, and the important point is that it is implemented as described above.

[0450] Terminal #2 at 302_2 in Fig. 12A charges its battery by receiving "signal 1301B_1 for wireless power transmission transmitted by base station #1 at 301_1 and addressed to terminal #2 at 302_2" and "signal 1301B_2 for wireless power transmission transmitted by base station #2 at 301_2 and addressed to terminal #2 at 302_2" in Fig. 13B1 and Fig. 13B2. The detailed operation will be described later.

[0451] Another example of the "(Downlink) TDM method for wireless power transmission signals" will now be described.

[0452] Fig. 13B3 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13B3, the horizontal axis represents time and the vertical axis represents frequency.

[0453] Fig. 13B4 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13B4, the horizontal axis represents time and the vertical axis represents frequency.

[0454] As shown in FIG. 13B3, "a wireless power transmission signal 1301B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" exists at the frequency BB1 and the time B1.

[0455] 13B4, "a wireless power transmission signal 1301B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" exists at the frequency BB1 and the time B2. Note that "a wireless power transmission signal 1301B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" also exists at a frequency other than BB1.

[0456] In other words, "wireless power transmission signal 1301B_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301B_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency but at different times.

[0457] Therefore, the (downlink) TDM method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0458] If the base station is a TRP, it is specifically implementing a (downlink) TDM method for signals for wireless power transmission by multiple TRPs.

[0459] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1301B_1 for wireless power transmission addressed to terminal #2 of 302_2 transmitted by base station #1 of 301_1" and "signal 1301B_2 for wireless power transmission addressed to terminal #2 of 302_2 transmitted by base station #2 of 301_2" in Fig. 13B3 and Fig. 13B4. Note that detailed operations will be described later.

[0460] Fig. 13B5 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 12A. In Fig. 13B5, the horizontal axis represents time and the vertical axis represents frequency.

[0461] Fig. 13B6 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 12A. In Fig. 13B6, the horizontal axis represents time and the vertical axis represents frequency.

[0462] As shown in FIG. 13B5, "a wireless power transmission signal 1301B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" exists at the frequency BB1 and the time B1.

[0463] 13B6, "a wireless power transmission signal 1301B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" exists at the frequency BB1 and the time B2. Note that "a wireless power transmission signal 1301B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" also exists at a frequency other than BB1.

[0464] In other words, "wireless power transmission signal 1301B_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1301B_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at the same (common) frequency but at different times.

[0465] Therefore, the (downlink) TDM method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0466] If the base station is a TRP, it is specifically implementing a (downlink) TDM method for signals for wireless power transmission by multiple TRPs.

[0467] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1301B_1 for wireless power transmission transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "signal 1301B_2 for wireless power transmission transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" in Fig. 13B5 and Fig. 13B6. Note that detailed operations will be described later.

[0468] The arrangement of the "wireless power transmission signal 1301B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" and the "wireless power transmission signal 1301B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" on the time axis and the frequency axis is not limited to the examples in "FIGS. 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6." Any arrangement can be implemented in the same way as long as the "wireless power transmission signal 1301B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" and the "wireless power transmission signal 1301B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" are present at the same (common) frequency but at different times."

[0469] Also, in Figure 12A, for example, two base stations or two TRPs transmit wireless power transmission signals using the TDM method, and terminal #2 of 302_2 obtains wireless power transmission signals from the two base stations or two TRPs, but two or more base stations or two or more TRPs may transmit wireless power transmission signals using the TDM method, and terminal #2 of 302_2 may obtain wireless power transmission signals from two or more base stations or two or more TRPs.

[0470] By implementing the above, the terminal can be efficiently charged, and the effect of being able to charge multiple terminals can be obtained.

[0471] Fig. 13C1 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 and base station #2 301_2 in Fig. 12A. In Fig. 13C1, the horizontal axis represents time and the vertical axis represents frequency.

[0472] 13C1, a "wireless power transmission signal 1311C_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" exists at frequency CC1 and time C1. Also, a "wireless power transmission signal 1311C_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exists at frequency CC2 and time C2.

[0473] In other words, "wireless power transmission signal 1311C_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "wireless power transmission signal 1311C_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist at different frequencies.

[0474] Therefore, the (downlink) FDM (Frequency Division Multiplexing) method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0475] If the base station is a TRP, it will in particular implement the (downlink) FDM method of signals for wireless power transmission by multiple TRPs.

[0476] Although the term is used here as the "(downlink) FDM method for wireless power transmission signals," the term is not limited to this, and the important point is that it is implemented as described above.

[0477] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1311C_1 for wireless power transmission transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and "signal 1311C_2 for wireless power transmission transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" in Fig. 13C1. Note that detailed operations will be described later.

[0478] Another example of a "(Downlink) FDM method for wireless power transmission signals" will now be described.

[0479] Fig. 13C2 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 and base station #2 301_2 in Fig. 12A. In Fig. 13C2, the horizontal axis represents time and the vertical axis represents frequency.

[0480] 13C2, a "wireless power transmission signal 1311C_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" exists at frequency CC1 and time C1. Also, a "wireless power transmission signal 1311C_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exists at frequency CC2 and time C2.

[0481] That is, the "wireless power transmission signal 1311C_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" and the "wireless power transmission signal 1311C_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" exist at different frequencies. However, there may be a time period during which the "wireless power transmission signal 1311C_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #2 of 302_2" and the "wireless power transmission signal 1311C_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #2 of 302_2" exist at the same time.

[0482] Therefore, the (downlink) FDM method for wireless power transmission signals is implemented by "base station #1 of 301_1 and base station #2 of 301_2."

[0483] If the base station is a TRP, it will in particular implement the (downlink) FDM method of signals for wireless power transmission by multiple TRPs.

[0484] Terminal #2 of 302_2 in Fig. 12A charges its battery by receiving "signal 1311C_1 for wireless power transmission transmitted from base station #1 of 301_1 to terminal #2 of 302_2" and "signal 1311C_2 for wireless power transmission transmitted from base station #2 of 301_2 to terminal #2 of 302_2" in Fig. 13C2. The detailed operation will be described later.

[0485] The arrangement of the "wireless power transmission signal 1311C_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" on the time axis and frequency axis and the "wireless power transmission signal 1311C_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" are not limited to the examples in Figures 13C1 and 13C2, and can be implemented in the same way regardless of the arrangement as long as the condition that "the "wireless power transmission signal 1311C_1 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" and the "wireless power transmission signal 1311C_2 transmitted by base station #2 of 301_2 and addressed to terminal #2 of 302_2" exist on different frequencies is satisfied.

[0486] Also, in Figure 12A, for example, two base stations or two TRPs transmit signals for wireless power transmission using the FDM method, and terminal #2 of 302_2 obtains signals for wireless power transmission from two base stations or two TRPs, but two or more base stations or two or more TRPs may transmit signals for wireless power transmission using the FDM method, and terminal #2 of 302_2 may obtain signals for wireless power transmission from two or more base stations or two or more TRPs.

[0487] By implementing the above, the terminal can be efficiently charged, and the effect of being able to charge multiple terminals can be obtained.

[0488] Below, we will explain the operations related to charging the battery equipped in a terminal and the operations of other terminals when using the ``SDM method for wireless power transmission signals,'' ``TDM method for wireless power transmission signals,'' and ``FDM method for wireless power transmission signals'' described above.

[0489] 3A, 3C, and 12A, "chargeable terminals," "communication-capable terminals," and "chargeable and communication-capable terminals" exist within the system. Furthermore, among these terminals, there may be "terminals that can be set to 'charge mode,'" "terminals that can be set to 'battery power reduction mode,'" and "terminals that can be set to 'charge mode,' and 'battery power reduction mode,'" as shown in FIG. 4, existing within the system.

[0490] Furthermore, it is possible that the system may include "terminals capable of multiple charging," "terminals capable of charging from multiple locations," "terminals capable of charging using the SDM method for wireless power transmission signals," "terminals capable of charging using the TDM method for wireless power transmission signals," and "terminals capable of charging using the FDM method for wireless power transmission signals."

[0491] In such a case, the base station needs to perform appropriate operations even when the terminal is compatible with wireless power transmission. This point will be explained below.

[0492] 14A and 14B show examples of the configuration of base station capability information 1400 transmitted to a terminal by a base station (for example, base station #1 of 301_1, base station #2 of 301_2) in FIGS. 3A, 3C, and 12A.

[0493] For example, as shown in Figures 14A and 14B, base station capability information 1400 includes "information 1411 on whether wireless power transmission is supported," "information 1412 on whether the "frequency (band) for transmitting a modulation signal for communication" and the "frequency (band) for transmitting a wireless power transmission signal" are supported when they are the same," "information 1413 on whether the "frequency (band) for transmitting a modulation signal for communication" and the "frequency (band) for transmitting a wireless power transmission signal" are supported when they are different," "information 1414 on whether transmission of a set of a modulation signal for communication and a wireless power transmission signal is supported," "information 1421 on whether SDM wireless power transmission is possible," "information 1422 on whether TDM wireless power transmission is possible," "information 1423 on whether FDM wireless power transmission is possible," "information 1424 on whether parallel wireless power transmission is possible," "information 1425 on the number of possible parallel wireless power transmissions," "information 1426 on whether phase adjustment and / or beam adjustment are possible," and "information 1427 on the number of possible phase adjustment and / or beam adjustment."

[0494] The "information 1411 on whether wireless power transmission is supported" is information for the base station to notify the terminal whether wireless power transmission is supported. Therefore, for example, by obtaining this information, the terminal can decide whether to request wireless power transmission from the base station.

[0495] The "information 1412 as to whether the 'frequency (band) for transmitting the modulation signal for communication' and the 'frequency (band) for transmitting the wireless power transmission signal' are compatible when they are the same" is information by which the base station notifies the terminal whether the "frequency (band) for transmitting the modulation signal for communication' and the "frequency (band) for transmitting the wireless power transmission signal" are compatible when they are the same. Therefore, by obtaining this information, for example, the terminal determines whether to request the base station to transmit (and receive) the modulation signal for communication and the wireless power transmission signal, where the "frequency (band) for transmitting the modulation signal for communication" and the "frequency (band) for transmitting the wireless power transmission signal" are the same.

[0496] The "information 1413 on whether the base station supports the case where the "frequency (band) for transmitting the modulation signal for communication" and the "frequency (band) for transmitting the wireless power transmission signal" are different" is information for the base station to notify the terminal of whether the base station supports the case where the "frequency (band) for transmitting the modulation signal for communication" and the "frequency (band) for transmitting the wireless power transmission signal" are different. Therefore, for example, by obtaining this information, the terminal determines whether to request the base station to transmit (and receive) the modulation signal for communication and the wireless power transmission signal, where the "frequency (band) for transmitting the modulation signal for communication" and the "frequency (band) for transmitting the wireless power transmission signal" are different.

[0497] The "information 1414 on whether or not the base station supports transmission of a set of a modulation signal for communication and a signal for wireless power transmission" is information for notifying the terminal whether or not the base station supports transmission of a set of a modulation signal for communication and a signal for wireless power transmission. Therefore, for example, by obtaining this information, the terminal determines whether or not to request the base station to transmit a set of a modulation signal for communication and a signal for wireless power transmission.

[0498] The "information 1421 on whether SDM wireless power transmission is possible" is information for notifying the terminal whether the base station supports the transmission of wireless power transmission signals using the SDM method. Therefore, for example, by obtaining this information, the terminal can decide whether to request the base station to transmit wireless power transmission signals using the SDM method.

[0499] The "information 1422 on whether TDM wireless power transmission is possible" is information for notifying the terminal whether the base station supports the transmission of wireless power transmission signals by the TDM method. Therefore, for example, by obtaining this information, the terminal can decide whether to request the base station to transmit wireless power transmission signals by the TDM method.

[0500] The "information 1423 on whether FDM wireless power transmission is possible" is information for notifying the terminal whether the base station supports the transmission of wireless power transmission signals using the FDM method. Therefore, for example, by obtaining this information, the terminal can decide whether to request the base station to transmit wireless power transmission signals using the FDM method.

[0501] The “information 1424 on whether parallel wireless power transmission is possible” is information for the base station to notify the terminal whether or not the base station supports transmission of wireless power transmission signals for parallel charging of the terminal by “transmission of wireless power transmission signals by the SDM method,” or “transmission of wireless power transmission signals by the TDM method,” or “transmission of wireless power transmission signals by the FDM method.” Therefore, for example, by obtaining this information, the terminal determines whether or not to request the base station to transmit wireless power transmission signals for parallel charging of the terminal by “transmission of wireless power transmission signals by the SDM method,” or “transmission of wireless power transmission signals by the TDM method,” or “transmission of wireless power transmission signals by the FDM method.”

[0502] The fact that terminals are charged in parallel will be explained later.

[0503] The “information 1425 of the number of possible parallel wireless power transmissions” is information on the number of wireless power transmission signals that can be transmitted when the base station transmits wireless power transmission signals for charging terminals in parallel by “transmission of wireless power transmission signals by the SDM method,” or “transmission of wireless power transmission signals by the TDM method,” or “transmission of wireless power transmission signals by the FDM method.” Therefore, for example, by obtaining this information, the terminal requests the base station for the number of wireless power transmission signals for charging terminals in parallel by “transmission of wireless power transmission signals by the SDM method,” or “transmission of wireless power transmission signals by the TDM method,” or “transmission of wireless power transmission signals by the FDM method.”

[0504] The “information 1426 on whether phase adjustment and / or beam adjustment is possible” is information for the base station to notify the terminal whether phase adjustment and / or beam adjustment of the wireless power transmission signal are supported when the base station transmits the wireless power transmission signal for charging the terminal by “transmitting the wireless power transmission signal by the SDM method,” or “transmitting the wireless power transmission signal by the TDM method,” or “transmitting the wireless power transmission signal by the FDM method.” Therefore, for example, by obtaining this information, the terminal determines whether to request the base station to perform phase adjustment and beam adjustment of the wireless power transmission signal when the terminal transmits the wireless power transmission signal for charging the terminal by “transmitting the wireless power transmission signal by the SDM method,” or “transmitting the wireless power transmission signal by the TDM method,” or “transmitting the wireless power transmission signal by the FDM method.”

[0505] The phase adjustment and beam adjustment will be explained later.

[0506] The “information 1427 on the number of possible phase adjustments and / or beam adjustments” is information for the base station to notify the terminal of the number of wireless power transmission signals for which “phase adjustment and beam adjustment” is possible when the base station transmits wireless power transmission signals for charging the terminal by “transmission of wireless power transmission signals by the SDM method,” or “transmission of wireless power transmission signals by the TDM method,” or “transmission of wireless power transmission signals by the FDM method.” Therefore, by obtaining this information, for example, the terminal can request the base station for the number of wireless power transmission signals for which “phase adjustment and beam adjustment” is to be performed when the terminal transmits wireless power transmission signals for charging the terminal by “transmission of wireless power transmission signals by the SDM method,” or “transmission of wireless power transmission signals by the TDM method,” or “transmission of wireless power transmission signals by the FDM method.”

[0507] The base station capability information 1400 can be implemented in a similar manner if it includes at least one of “information 1411 indicating whether wireless power transmission is supported,” “information 1412 indicating whether the “frequency (band) for transmitting a modulation signal for communication” and the “frequency (band) for transmitting a wireless power transmission signal” are supported when they are the same,” “information 1413 indicating whether the “frequency (band) for transmitting a modulation signal for communication” and the “frequency (band) for transmitting a wireless power transmission signal” are supported when they are different,” “information 1414 indicating whether transmission of a set of a modulation signal for communication and a wireless power transmission signal is supported,” “information 1421 indicating whether SDM wireless power transmission is possible,” “information 1422 indicating whether TDM wireless power transmission is possible,” “information 1423 indicating whether FDM wireless power transmission is possible,” “information 1424 indicating whether parallel wireless power transmission is possible,” “information 1425 indicating the number of possible parallel wireless power transmissions,” “information 1426 indicating whether phase adjustment and / or beam adjustment is possible,” and “information 1427 indicating the number of possible phase adjustment and / or beam adjustments.”

[0508] 15A and 15B show examples of the configuration of terminal capability information 1500 that the terminals in FIGS. 3A, 3C, and 12A transmit to base stations (for example, base station #1 of 301_1, base station #2 of 301_2).

[0509] For example, as shown in Figures 15A and 15B, terminal capability information 1500 includes "information 1511 as to whether charging via wireless power transmission is supported," "information 1512 as to whether reception is supported when the "frequency (band) for transmitting a modulated signal for communication" and the "frequency (band) for transmitting a wireless power transmission signal" are the same," "information 1513 as to whether reception is supported when the "frequency (band) for transmitting a modulated signal for communication" and the "frequency (band) for transmitting a wireless power transmission signal" are different," "information 1514 as to whether reception of a set of a modulated signal for communication and a wireless power transmission signal is supported," "information 1515 as to whether reception beamforming during wireless power transmission is supported," "information 1521 as to whether charging via SDM wireless power transmission is supported," "information 1522 as to whether charging via TDM wireless power transmission is supported," "information 1523 as to whether charging via FDM wireless power transmission is supported," "information 1524 as to whether parallel charging is supported," "information 1525 as to the number of possible parallel chargings," "information 1526 as to whether combined charging is supported," and "information 1527 as to the number of possible combined chargings."

[0510] The "information 1511 on whether charging via wireless power transmission is supported" is information for notifying the base station whether the terminal is capable of charging via wireless power transmission. Therefore, for example, by obtaining this information, the base station determines whether to transmit wireless power to the terminal.

[0511] The "information 1512 as to whether reception is supported when the 'frequency (band) for transmitting the modulation signal for communication' and the 'frequency (band) for transmitting the wireless power transmission signal' are the same" is information for notifying the base station whether the terminal is capable of reception when the 'frequency (band) for transmitting the modulation signal for communication' and the 'frequency (band) for transmitting the wireless power transmission signal' are the same. Therefore, for example, by obtaining this information, the base station determines whether or not to transmit to the terminal when the 'frequency (band) for transmitting the modulation signal for communication' and the 'frequency (band) for transmitting the wireless power transmission signal' are the same.

[0512] The "information 1513 on whether reception is supported when the 'frequency (band) for transmitting the modulation signal for communication' and the 'frequency (band) for transmitting the wireless power transmission signal' are different" is information for notifying the base station whether the terminal is capable of reception when the 'frequency (band) for transmitting the modulation signal for communication' and the 'frequency (band) for transmitting the wireless power transmission signal' are different. Therefore, for example, by obtaining this information, the base station can determine to the terminal whether or not to transmit when the 'frequency (band) for transmitting the modulation signal for communication' and the 'frequency (band) for transmitting the wireless power transmission signal' are different.

[0513] The "information 1514 on whether or not the terminal is capable of receiving a set of a modulation signal for communication and a signal for wireless power transmission" is information for notifying the base station whether or not the terminal is capable of receiving a set of a modulation signal for communication and a signal for wireless power transmission. Therefore, for example, by obtaining this information, the base station determines whether or not to transmit a set of a modulation signal for communication and a signal for wireless power transmission to the terminal.

[0514] The "information 1515 on whether or not the terminal supports receive beamforming during wireless power transmission" is information for notifying the base station whether or not the terminal supports receive beamforming during wireless power transmission. Therefore, for example, by obtaining this information, the base station determines whether or not to transmit to the terminal a procedure for implementing receive beamforming.

[0515] The "information 1521 on whether charging by SDM wireless power transmission is possible" is information for notifying the base station whether the terminal is compatible with charging by wireless power transmission using the SDM method. Therefore, for example, by obtaining this information, the base station can determine whether to transmit a wireless power transmission signal using the SDM method to the terminal.

[0516] The "information 1522 on whether charging by TDM wireless power transmission is possible" is information for notifying the base station whether the terminal supports charging by TDM wireless power transmission. Therefore, for example, by obtaining this information, the base station can determine whether to transmit a wireless power transmission signal by TDM to the terminal.

[0517] The "information 1523 indicating whether charging by FDM wireless power transmission is possible" is information for notifying the base station whether the terminal supports charging by FDM wireless power transmission. Therefore, for example, by obtaining this information, the base station can determine whether to transmit a wireless power transmission signal by FDM to the terminal.

[0518] The "information 1524 on whether parallel charging is possible" is information for notifying the base station whether the terminal supports parallel charging to the base station's "transmission of a wireless power transmission signal by the SDM method," "transmission of a wireless power transmission signal by the TDM method," or "transmission of a wireless power transmission signal by the FDM method." Therefore, by obtaining this information, for example, the base station determines whether to cause the terminal to "transmit a wireless power transmission signal by the SDM method," "transmit a wireless power transmission signal by the TDM method," or "transmit a wireless power transmission signal by the FDM method" for parallel charging.

[0519] The "information 1525 on the number of signals that can be charged in parallel" is information for notifying the base station of the number of signals that can be charged in parallel with the "transmission of wireless power transmission signals by the SDM method," or the "transmission of wireless power transmission signals by the TDM method," or the "transmission of wireless power transmission signals by the FDM method" of the base station. Therefore, by obtaining this information, for example, the base station determines the number of wireless power transmission signals to transmit when "transmitting wireless power transmission signals by the SDM method," or "transmitting wireless power transmission signals by the TDM method," or "transmitting wireless power transmission signals by the FDM method" is performed for parallel charging of the terminal.

[0520] The fact that terminals are charged in parallel will be explained later.

[0521] The "information 1526 on whether composite charging is possible" is information for notifying the base station whether the terminal is capable of performing composite charging in response to the base station's "transmission of a wireless power transmission signal by the SDM method," or "transmission of a wireless power transmission signal by the TDM method," or "transmission of a wireless power transmission signal by the FDM method." Therefore, by obtaining this information, for example, the base station determines whether to perform "phase adjustment and beam adjustment" for composite charging when the terminal "transmits a wireless power transmission signal by the SDM method," or "transmits a wireless power transmission signal by the TDM method," or "transmits a wireless power transmission signal by the FDM method."

[0522] The phase adjustment and beam adjustment will be explained later.

[0523] The "information 1527 on the number of signals that can be combined for charging" is information for the terminal to notify the base station of the number of signals that can be combined for charging in response to the base station's "transmission of wireless power transmission signals by the SDM method," "transmission of wireless power transmission signals by the TDM method," or "transmission of wireless power transmission signals by the FDM method." Therefore, by obtaining this information, for example, the base station determines the number of wireless power transmission signals to be "phase-adjusted and beam-adjusted" for combining for charging in response to the "transmission of wireless power transmission signals by the SDM method," "transmission of wireless power transmission signals by the TDM method," or "transmission of wireless power transmission signals by the FDM method."

[0524] In addition, the terminal capability information 1500 can be implemented in a similar manner if it includes at least one of “information 1511 as to whether charging via wireless power transmission is supported,” “information 1512 as to whether reception is supported when the “frequency (band) for transmitting a modulated signal for communication” and the “frequency (band) for transmitting a wireless power transmission signal” are the same,” “information 1513 as to whether reception is supported when the “frequency (band) for transmitting a modulated signal for communication” and the “frequency (band) for transmitting a wireless power transmission signal” are different,” “information 1514 as to whether reception of a set of a modulated signal for communication and a wireless power transmission signal is supported,” “information 1515 as to whether reception beamforming during wireless power transmission is supported,” “information 1521 as to whether charging via SDM wireless power transmission is possible,” “information 1522 as to whether charging via TDM wireless power transmission is possible,” “information 1523 as to whether charging via FDM wireless power transmission is possible,” “information 1524 as to whether parallel charging is possible,” “information 1525 as to the number of possible parallel chargings,” “information 1526 as to whether combined charging is possible,” and “information 1527 as to the number of possible combined chargings.”

[0525] As described above, by the base station and the terminal sharing base station capability information and terminal capability information, the base station can transmit wireless power in a manner suitable for the terminal's situation, and the terminal can charge in a manner suitable for the base station's situation.

[0526] We will explain how the terminal "charges in parallel and charges efficiently."

[0527] As explained using Figure 12A, Figures 13A1 and 13A2, Figures 13A3 and 13A4, Figures 13A5 and 13A6, Figures 13A7 and 13A8, and Figures 13A9 and 13A10, base station #1 of 301_1 and base station #2 of 301_2 transmit (downlink) SDM-method wireless power transmission signals to terminal #2 of 302_2.

[0528] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12B. In Fig. 12B, U is 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1 and antenna unit 1 of 1212B_1," "charging function unit 2 of 1211B_2 and antenna unit 2 of 1212B_2." It is assumed that terminal #2 of 302_2 also has other components.

[0529] For example, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301A_1 addressed to terminal #2" in "Figures 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10," thereby causing the battery to be charged in the "charging function unit 1 of 1211B_1."

[0530] In addition, the "antenna unit 2 of 1212B_2" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301A_2 addressed to terminal #2" in "Figures 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10," thereby causing the battery to be charged in the "charging function unit 2 of 1211B_2."

[0531] The above is an example of the parallel charging operation in terminal #2 of 302_2. This provides the effect of enabling multiple terminals to be charged.

[0532] As explained using Figures 12A, 13B1 and 13B2, 13B3 and 13B4, and 13B5 and 13B6, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals using the (downlink) TDM method to terminal #2 of 302_2.

[0533] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12B. In Fig. 12B, U is 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1 and antenna unit 1 of 1212B_1," "charging function unit 2 of 1211B_2 and antenna unit 2 of 1212B_2." It is assumed that terminal #2 of 302_2 also has other components.

[0534] For example, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301B_1 addressed to terminal #2" in "Figures 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6," thereby causing the battery to be charged in the "charging function unit 1 of 1211B_1."

[0535] In addition, the "antenna unit 2 of 1212B_2" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301B_2 addressed to terminal #2" in "Figures 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6," thereby causing the battery to be charged in the "charging function unit 2 of 1211B_2."

[0536] The above is an example of the parallel charging operation in terminal #2 of 302_2. This provides the effect of enabling multiple terminals to be charged.

[0537] As explained using Figures 12A, 13C1, and 13C2, base station #1 of 301_1 and base station #2 of 301_2 transmit (downlink) FDM wireless power transmission signals to terminal #2 of 302_2.

[0538] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12B. In Fig. 12B, U is 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1 and antenna unit 1 of 1212B_1," "charging function unit 2 of 1211B_2 and antenna unit 2 of 1212B_2." It is assumed that terminal #2 of 302_2 also has other components.

[0539] For example, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1311C_1 sent by base station #1 to terminal #2" in Figures 13C1 and 13C2, which causes the battery to be charged in the "charging function unit 1 of 1211B_1."

[0540] In addition, the "antenna unit 2 of 1212B_2" of terminal #2 of 302_2 receives the "wireless power transmission signal 1311C_2 sent by base station #2 to terminal #2" in Figures 13C1 and 13C2, thereby causing the battery to be charged in the "charging function unit 2 of 1211B_2."

[0541] The above is an example of the parallel charging operation in terminal #2 of 302_2. This provides the effect of enabling multiple terminals to be charged.

[0542] Phase adjustment and beam adjustment will be explained.

[0543] As explained using Figure 12A, Figures 13A1 and 13A2, Figures 13A3 and 13A4, Figures 13A5 and 13A6, Figures 13A7 and 13A8, and Figures 13A9 and 13A10, base station #1 of 301_1 and base station #2 of 301_2 transmit (downlink) SDM-method wireless power transmission signals to terminal #2 of 302_2.

[0544] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12B. In Fig. 12B, U is set to 1, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1 and antenna unit 1 of 1212B_1." It is assumed that terminal #2 of 302_2 also has other components.

[0545] For example, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301A_1 addressed to terminal #2" in "Figures 13A1, 13A2," "Figures 13A3, 13A4," "Figures 13A5, 13A6," "Figures 13A7, 13A8," and "Figures 13A9, 13A10."

[0546] In addition, the "antenna section 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301A_2 addressed to terminal #2" in "Figures 13A1, 13A2," "Figures 13A3, 13A4," "Figures 13A5, 13A6," "Figures 13A7, 13A8," and "Figures 13A9, 13A10."

[0547] As a result, the battery is charged in the "charging function unit 1 of 1211B_1."

[0548] At this time, base station #1 of 301_1 and base station #2 of 301_2 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be either base station #1 of 301_1 or base station #2 of 301_2. Also, although "terminal" is described below, it means "terminal #2 of 302_2."

[0549] FIG. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment."

[0550] The base station is assumed to be capable of transmitting a wireless power transmission signal and performing communication. The terminal is assumed to be capable of charging using the wireless power transmission signal and performing communication. The configuration and operation of the base station have been described using "Figures 1A, 1B, 1C1, 1C2, 1D1, 1D2, 1E, 1F, 1G, and 1H," and the configuration and operation of the terminal have been described using "Figures 12B, 12C, and 12D," etc., so description thereof will be omitted.

[0551] The terminal requests the base station to perform "phase adjustment and / or beam adjustment" (1651). In response to this request, the base station determines whether to perform "phase adjustment and / or beam adjustment" (1601). Note that the following description will be given of the case where the base station performs "phase adjustment and / or beam adjustment."

[0552] The base station transmits information regarding whether to perform "phase adjustment and / or beam adjustment" to the terminal (1602). The terminal receives the information regarding whether to perform "phase adjustment and / or beam adjustment" transmitted from the base station (1652).

[0553] It is assumed that the base station has decided to perform "phase adjustment and / or beam adjustment." Therefore, the terminal transmits "reception status information" to the base station in order for the base station to perform "phase adjustment and / or beam adjustment" (1653). For example, suitable examples of the reception status information include the "reception status, phase status, and reception power status" of the signal transmitted by the base station.

[0554] The base station obtains the "reception state information" transmitted by the terminal and determines a method for "phase adjustment and / or beam adjustment" (1603). Note that examples of the method for "phase adjustment and / or beam adjustment" will be described later.

[0555] The base station performs phase adjustment and / or beam adjustment on the wireless power transmission signal based on the determined method for “phase adjustment and / or beam adjustment” and transmits the phase-adjusted and / or beam-adjusted wireless power transmission signal to the terminal (1604).

[0556] The terminal receives the phase-adjusted and / or beam-adjusted wireless power transmission signal and charges the battery (1654).

[0557] A method for "phase adjustment and / or beam adjustment" is described.

[0558] Terminal #2 of 302_2 having the configuration of FIG. 12B receives, via "antenna section 1 of 1212B_1," "wireless power transmission signal 1301A_1 addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10" transmitted by base station #1 of 301_1, and "wireless power transmission signal 1301A_2 addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10" transmitted by base station #2 of 301_2, and performs charging. At this time, the relationship between the "signal 1301A_1 for wireless power transmission addressed to terminal #2" and the "signal 1301A_2 for wireless power transmission addressed to terminal #2" affects the charging efficiency (charging time).

[0559] The "antenna unit 1 of 1212B_1" receives a composite signal of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" and the "signal 1301A_2 for wireless power transmission addressed to terminal #2." If the power of this composite signal is high, efficient charging becomes possible. For this reason, communication between the base station and the terminal shown in FIG. 16 is performed.

[0560] At this time, the base station #1 of 301_1 performs phase control (phase adjustment) of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10," and the base station #2 of 301_2 performs phase control (phase adjustment) of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10." 13A5, 13A6, 13A7, 13A8, 13A9, 13A10, the phase control (phase adjustment) of the "signal 1301A_2 for wireless power transmission addressed to terminal #2" can be performed so that the power of the combined signal of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" and the "signal 1301A_2 for wireless power transmission addressed to terminal #2" can be increased at "antenna unit 1 of 1212B_1."

[0561] Further, the base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10," and the base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10." 13A6, 13A7, 13A8, 13A9, 13A10, beam control (beam adjustment, transmission directivity control) of the "signal 1301A_2 for wireless power transmission addressed to terminal #2" can be performed so that the power of the combined signal of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" and the "signal 1301A_2 for wireless power transmission addressed to terminal #2" can be increased in the "antenna unit 1 of 1212B_1."

[0562] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0563] As explained using Figures 12A, 13B1 and 13B2, 13B3 and 13B4, and 13B5 and 13B6, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals using the (downlink) TDM method to terminal #2 of 302_2.

[0564] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12B. In Fig. 12B, U is set to 1, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1 and antenna unit 1 of 1212B_1." It is assumed that terminal #2 of 302_2 also has other components.

[0565] For example, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301B_1 addressed to terminal #2" in "Figures 13B1, 13B2," "Figures 13B3, 13B4," and "Figures 13B5, 13B6."

[0566] In addition, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301B_2 addressed to terminal #2" in "Figures 13B1, 13B2," "Figures 13B3, 13B4," and "Figures 13B5, 13B6."

[0567] As a result, the battery is charged in the "charging function unit 1 of 1211B_1."

[0568] At this time, base station #1 of 301_1 and base station #2 of 301_2 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be either base station #1 of 301_1 or base station #2 of 301_2. Also, although "terminal" is described below, it means "terminal #2 of 302_2."

[0569] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0570] Terminal #2 of 302_2 having the configuration of FIG. 12B receives, via "antenna section 1 of 1212B_1," "wireless power transmission signal 1301B_1 addressed to terminal #2" in "FIGS. 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6" transmitted by base station #1 of 301_1, and "wireless power transmission signal 1301B_2 addressed to terminal #2" in "FIGS. 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6" transmitted by base station #2 of 301_2, and performs charging.

[0571] At this time, the states of the "signal 1301B_1 for wireless power transmission addressed to terminal #2" and the "signal 1301B_2 for wireless power transmission addressed to terminal #2" affect the charging efficiency (charging time).

[0572] When "antenna unit 1 of 1212B_1" receives high reception power from "wireless power transmission signal 1301B_1 addressed to terminal #2" and "wireless power transmission signal 1301B_2 addressed to terminal #2," it becomes possible to perform efficient charging. For this reason, communication between the base station and the terminal shown in FIG. 16 is performed.

[0573] At this time, base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_1 addressed to terminal #2" in "Figures 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6," and base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_2 addressed to terminal #2" in "Figures 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6," so that "antenna unit 1 of 1212B_1" can obtain high reception power from the "wireless power transmission signal 1301B_1 addressed to terminal #2" and the "wireless power transmission signal 1301B_2 addressed to terminal #2."

[0574] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0575] As explained using Figures 12A, 13C1, and 13C2, base station #1 of 301_1 and base station #2 of 301_2 transmit (downlink) FDM wireless power transmission signals to terminal #2 of 302_2.

[0576] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12B. In Fig. 12B, U is set to 1, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1 and antenna unit 1 of 1212B_1." It is assumed that terminal #2 of 302_2 also has other components.

[0577] For example, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1311C_1 sent by base station #1 to terminal #2" in Figures 13C1 and 13C2, which causes the battery to be charged in the "charging function unit 1 of 1211B_1."

[0578] In addition, the "antenna unit 1 of 1212B_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1311C_2 sent by base station #2 to terminal #2" in Figures 13C1 and 13C2, thereby causing the battery to be charged in the "charging function unit 1 of 1211B_1."

[0579] At this time, base station #1 of 301_1 and base station #2 of 301_2 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be either base station #1 of 301_1 or base station #2 of 301_2. Also, although "terminal" is described below, it means "terminal #2 of 302_2."

[0580] FIG. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment."

[0581] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0582] Terminal #2 of 302_2 having the configuration of FIG. 12B receives, via "antenna section 1 of 1212B_1," "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" in FIGS. 13C1 and 13C2, and "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2" in FIGS. 13C1 and 13C2, transmitted by base station #1 of 301_1, and performs charging.

[0583] At this time, the reception status of "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" and "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2" will affect the charging efficiency (charging time).

[0584] When the "antenna unit 1 of 1212B_1" receives high reception power from the "wireless power transmission signal 1311C_1 transmitted from the base station #1 to the terminal #2" and the "wireless power transmission signal 1311C_2 transmitted from the base station #2 to the terminal #2," it becomes possible to perform efficient charging. For this reason, communication between the base station and the terminal shown in FIG. 16 is performed.

[0585] At this time, base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" in Figures 13C1 and 13C2, and base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2" in Figures 13C1 and 13C2, and antenna unit 1 of 1212B_1 can obtain high receiving power from "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" and "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2."

[0586] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0587] Another example of phase adjustment and beam adjustment will be described.

[0588] As explained using Figure 12A, Figures 13A1 and 13A2, Figures 13A3 and 13A4, Figures 13A5 and 13A6, Figures 13A7 and 13A8, and Figures 13A9 and 13A10, base station #1 of 301_1 and base station #2 of 301_2 transmit (downlink) SDM-method wireless power transmission signals to terminal #2 of 302_2.

[0589] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12C. In Fig. 12C, V1 is set to 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1, antenna unit 1_1 of 1213C_1_1, and antenna unit 1_2 of 1213C_1_2." It is assumed that terminal #2 of 302_2 also has other components.

[0590] For example, the "antenna unit 1_1 of 1213C_1_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301A_1 addressed to terminal #2" in "Figures 13A1, 13A2," "Figures 13A3, 13A4," "Figures 13A5, 13A6," "Figures 13A7, 13A8," and "Figures 13A9, 13A10."

[0591] In addition, the "antenna section 1_2 of 1213C_1_2" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301A_2 addressed to terminal #2" in "Figures 13A1, 13A2," "Figures 13A3, 13A4," "Figures 13A5, 13A6," "Figures 13A7, 13A8," and "Figures 13A9, 13A10."

[0592] As a result, the battery is charged in the "charging function unit 1 of 1211B_1."

[0593] At this time, base station #1 of 301_1 and base station #2 of 301_2 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be either base station #1 of 301_1 or base station #2 of 301_2. Also, although "terminal" is described below, it means "terminal #2 of 302_2."

[0594] FIG. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment."

[0595] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0596] The terminal #2 of 302_2 having the configuration of FIG. 12C receives, via the "antenna unit 1_1 of 1213C_1_1", the "wireless power transmission signal 1301A_1 addressed to terminal #2" in "FIGS. 13A1, 13A2", "FIGS. 13A3, 13A4", "FIGS. 13A5, 13A6", "FIGS. 13A7, 13A8", and "FIGS. 13A9, 13A10" transmitted by the base station #1 of 301_1. 13A1, 13A2, 13A3, 13A4, 13A5, 13A6, 13A7, 13A8, and 13A9, 13A10 transmitted by base station #2 of 301_2, and charging is performed by receiving "signal 1301A_1 for wireless power transmission addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10" using "antenna unit 1_2 of 1213C_1_2." At this time, the reception state of "signal 1301A_1 for wireless power transmission addressed to terminal #2" and "signal 1301A_2 for wireless power transmission addressed to terminal #2" affects charging efficiency (charging time).

[0597] The "antenna unit 1_1 of 1213C_1_1" receives the "signal 1301A_1 for wireless power transmission addressed to terminal #2," and the "antenna unit 1_2 of 1213C_1_2" receives the "signal 1301A_2 for wireless power transmission addressed to terminal #2." However, efficient charging may be possible depending on the phase state of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" and the "signal 1301A_2 for wireless power transmission addressed to terminal #2." For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0598] Therefore, base station #1 of 301_1 performs phase control (phase adjustment) of the "wireless power transmission signal 1301A_1 addressed to terminal #2" in "Figures 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10," and base station #2 of 301_2 performs phase control (phase adjustment) of the "wireless power transmission signal 1301A_2 addressed to terminal #2" in "Figures 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10."

[0599] Further, the base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10," and the base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" in "FIGS. 13A1, 13A2," "13A3, 13A4," "13A5, 13A6," "13A7, 13A8," and "13A9, 13A10." By performing beam control (beam adjustment, transmission directivity control) of the "signal 1301A_2 for wireless power transmission addressed to terminal #2" in "Figures 13A7, 13A8," "Figures 13A9, 13A10," it is possible to increase the reception power of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" and the "signal 1301A_2 for wireless power transmission addressed to terminal #2" at "antenna unit 1_1 of 1213C_1_1" and "antenna unit 1_2 of 1213C_1_2."

[0600] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0601] As explained using Figures 12A, 13B1 and 13B2, 13B3 and 13B4, and 13B5 and 13B6, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals using the (downlink) TDM method to terminal #2 of 302_2.

[0602] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12C. In Fig. 12C, V1 is set to 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1, antenna unit 1_1 of 1213C_1_1, and antenna unit 1_2 of 1213C_1_2." It is assumed that terminal #2 of 302_2 also has other components.

[0603] For example, the "antenna section 1_1 of 1213C_1_1" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301B_1 addressed to terminal #2" in "Figures 13B1, 13B2," "Figures 13B3, 13B4," and "Figures 13B5, 13B6."

[0604] Furthermore, the "antenna unit 1_2 of 1213C_1_2" of terminal #2 of 302_2 receives the "wireless power transmission signal 1301B_2 addressed to terminal #2" in "Figures 13B1, 13B2," "Figures 13B3, 13B4," and "Figures 13B5, 13B6."

[0605] As a result, the battery is charged in the "charging function unit 1 of 1211B_1."

[0606] At this time, base station #1 of 301_1 and base station #2 of 301_2 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be either base station #1 of 301_1 or base station #2 of 301_2. Also, although "terminal" is described below, it means "terminal #2 of 302_2."

[0607] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0608] Terminal #2 of 302_2 having the configuration of FIG. 12C receives, at "antenna section 1_1 of 1213C_1_1," "wireless power transmission signal 1301B_1 addressed to terminal #2" in "FIGS. 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6" transmitted by base station #1 of 301_1, and receives, at "antenna section 1_2 of 1213C_1_2," "wireless power transmission signal 1301B_2 addressed to terminal #2" in "FIGS. 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6" transmitted by base station #2 of 301_2, thereby performing charging.

[0609] At this time, the states of the "signal 1301B_1 for wireless power transmission addressed to terminal #2" and the "signal 1301B_2 for wireless power transmission addressed to terminal #2" affect the charging efficiency (charging time).

[0610] When "antenna unit 1_1 of 1213C_1_1" and "antenna unit 1_2 of 1213C_1_2" receive high reception power from "wireless power transmission signal 1301B_1 addressed to terminal #2" and "wireless power transmission signal 1301B_2 addressed to terminal #2," efficient charging becomes possible. For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0611] At this time, base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_1 addressed to terminal #2" in "Figures 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6," and base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_2 addressed to terminal #2" in "Figures 13B1, 13B2," "13B3, 13B4," and "13B5, 13B6," thereby enabling "antenna unit 1_1 of 1213C_1_1" and "antenna unit 1_2 of 1213C_1_2" to obtain high reception power from the "wireless power transmission signal 1301B_1 addressed to terminal #2" and the "wireless power transmission signal 1301B_2 addressed to terminal #2."

[0612] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0613] As explained using Figures 12A, 13C1, and 13C2, base station #1 of 301_1 and base station #2 of 301_2 transmit (downlink) FDM wireless power transmission signals to terminal #2 of 302_2.

[0614] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12C. In Fig. 12C, V1 is set to 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1, antenna unit 1_1 of 1213C_1_1, and antenna unit 1_2 of 1213C_1_2." It is assumed that terminal #2 of 302_2 also has other components.

[0615] For example, the "antenna unit 1_1 of 1213C_1_1" of terminal #2 of 302_2 receives the "signal for wireless power transmission 1311C_1 transmitted by base station #1 and addressed to terminal #2" in FIGS. 13C1 and 13C2.

[0616] Furthermore, the "antenna unit 1_2 of 1213C_1_2" of terminal #2 of 302_2 receives the "signal for wireless power transmission 1311C_2 transmitted by base station #2 and addressed to terminal #2" in FIGS. 13C1 and 13C2.

[0617] As a result, the battery is charged in the "charging function unit 1 of 1211B_1."

[0618] At this time, base station #1 of 301_1 and base station #2 of 301_2 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be either base station #1 of 301_1 or base station #2 of 301_2. Also, although "terminal" is described below, it means "terminal #2 of 302_2."

[0619] FIG. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment."

[0620] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0621] Terminal #2 of 302_2 having the configuration of Figure 12C receives, at "antenna section 1_1 of 1213C_1_1," "wireless power transmission signal 1311C_1 transmitted by base station #1 and addressed to terminal #2" in Figures 13C1 and 13C2 transmitted by base station #1 of 301_1, and receives, at "antenna section 1_2 of 1213C_1_2," "wireless power transmission signal 1311C_2 transmitted by base station #2 and addressed to terminal #2" in Figures 13C1 and 13C2 transmitted by base station #2 of 301_2, thereby performing charging.

[0622] At this time, the reception status of "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" and "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2" will affect the charging efficiency (charging time).

[0623] When "antenna unit 1_1 of 1213C_1_1" and "antenna unit 1_2 of 1213C_1_2" can receive high reception power from "wireless power transmission signal 1311C_1 transmitted from base station #1 to terminal #2" and "wireless power transmission signal 1311C_2 transmitted from base station #2 to terminal #2," efficient charging becomes possible. For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0624] At this time, base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" in Figures 13C1 and 13C2, and base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2" in Figures 13C1 and 13C2, thereby enabling "antenna unit 1_1 of 1213C_1_1" and "antenna unit 1_2 of 1213C_1_2" to obtain high reception power from "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" and "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2."

[0625] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0626] Another example of phase adjustment and beam adjustment will be described.

[0627] 17 shows an example of the relationship between base stations and terminals. It is assumed that base station #1 301_1, base station #2 301_2, base station #3 301_3, and base station #4 301_4 are transmitting power wirelessly to terminal #2 302_2.

[0628] As explained in "Figures 13A1 and 13A2," "Figures 13A3 and 13A4," "Figures 13A5 and 13A6," "Figures 13A7 and 13A8," and "Figures 13A9 and 13A10," base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, and base station #4 of 301_4 are assumed to transmit (downlink) wireless power transmission signals using the SDM method. Therefore, base station #1 at 301_1 transmits a "wireless power transmission signal 1301A_1 addressed to terminal #2," base station #2 at 301_2 transmits a "wireless power transmission signal 1301A_2 addressed to terminal #2," base station #3 at 301_3 transmits a "wireless power transmission signal 1301A_3 addressed to terminal #2," and base station #4 at 301_4 transmits a "wireless power transmission signal 1301A_4 addressed to terminal #2." Note that "signal 1301A_3 for wireless power transmission addressed to terminal #2" and "signal 1301A_4 for wireless power transmission addressed to terminal #2" are not shown in "Figures 13A1, 13A2," "Figures 13A3, 13A4," "Figures 13A5, 13A6," "Figures 13A7, 13A8," and "Figures 13A9, 13A10," but "signal 1301A_3 for wireless power transmission addressed to terminal #2" and "signal 1301A_4 for wireless power transmission addressed to terminal #2" are arranged on the time and frequency axes so as to realize a (downlink) SDM method wireless power transmission signal.

[0629] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12D. In Fig. 12D, U is 2, V1 is 2, and V2 is 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1, antenna unit 1_1 of 1213D_1_1, antenna unit 1_2 of 1213D_1_2," and "charging function unit 2 of 1211B_2, antenna unit 2_1 of 1213D_2_1, and antenna unit 2_2 of 1213D_2_2." It is assumed that terminal #2 of 302_2 also has other components.

[0630] For example, the "antenna unit 1_1 of 1213D_1_1" of terminal #2 of 302_2 receives the "signal 1301A_1 for wireless power transmission addressed to terminal #2" transmitted by base station #1 of 301_1. Also, the "antenna unit 1_2 of 1213D_1_2" of terminal #2 of 302_2 receives the "signal 1301A_2 for wireless power transmission addressed to terminal #2" transmitted by base station #2 of 301_2.

[0631] The "antenna unit 2_1 of 1213D_2_1" of terminal #2 302_2 receives the "signal 1301A_3 for wireless power transmission addressed to terminal #2" transmitted by base station #3 301_3. The "antenna unit 2_2 of 1213D_2_2" of terminal #2 302_2 receives the "signal 1301A_4 for wireless power transmission addressed to terminal #2" transmitted by base station #4 301_4.

[0632] As a result, the batteries are charged in the "charging function unit 1 of 1211B_1" and the "charging function unit 2 of 1211B_2."

[0633] At this time, base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, and base station #4 of 301_4 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be any of base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, and base station #4 of 301_4. Also, although "terminal" is described below, it means "terminal #2 of 302_2" here.

[0634] FIG. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment."

[0635] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0636] The terminal #2 of 302_2 having the configuration of FIG. 12D receives, at the "antenna section 1_1 of 1213D_1_1", the "signal for wireless power transmission 1301A_1 addressed to the terminal #2" transmitted by the base station #1 of 301_1, and receives, at the "antenna section 1_2 of 1213D_1_2", the "signal for wireless power transmission 1301A_2 addressed to the terminal #2" transmitted by the base station #2 of 301_2. By receiving the "wireless power transmission signal 1301A_3 addressed to terminal #2" transmitted by base station #3 of 301_3 at "antenna unit 2_1" and the "wireless power transmission signal 1301A_4 addressed to terminal #2" transmitted by base station #4 of 301_4 at "antenna unit 2_2 of 1213D_2_2", "charging function unit 1 of 1211B_1" and "charging function unit 2 of 1211B_2" will perform charging.

[0637] At this time, the reception status of "wireless power transmission signal 1301A_1 addressed to terminal #2," "wireless power transmission signal 1301A_2 addressed to terminal #2," "wireless power transmission signal 1301A_3 addressed to terminal #2," and "wireless power transmission signal 1301A_4 addressed to terminal #2" will affect the charging efficiency (charging time).

[0638] The "antenna unit 1_1 of 1213D_1_1" receives the "signal 1301A_1 for wireless power transmission addressed to terminal #2," and the "antenna unit 1_2 of 1213D_1_2" receives the "signal 1301A_2 for wireless power transmission addressed to terminal #2." However, efficient charging may be possible depending on the phase state of the "signal 1301A_1 for wireless power transmission addressed to terminal #2" and the "signal 1301A_2 for wireless power transmission addressed to terminal #2." For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0639] Furthermore, the "antenna unit 2_1 of 1213D_2_1" receives the "signal 1301A_3 for wireless power transmission addressed to terminal #2," and the "antenna unit 2_2 of 1213D_2_2" receives the "signal 1301A_4 for wireless power transmission addressed to terminal #2." However, efficient charging may be possible depending on the phase state of the "signal 1301A_3 for wireless power transmission addressed to terminal #2" and the "signal 1301A_4 for wireless power transmission addressed to terminal #2." For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0640] Therefore, base station #1 at 301_1 performs phase control (phase adjustment) of the "wireless power transmission signal 1301A_1 addressed to terminal #2," base station #2 at 301_2 performs phase control (phase adjustment) of the "wireless power transmission signal 1301A_2 addressed to terminal #2," base station #3 at 301_3 performs phase control (phase adjustment) of the "wireless power transmission signal 1301A_3 addressed to terminal #2," and base station #4 at 301_4 performs phase control (phase adjustment) of the "wireless power transmission signal 1301A_4 addressed to terminal #2."

[0641] Furthermore, the base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301A_1 addressed to terminal #2", the base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301A_2 addressed to terminal #2", the base station #3 of 301_3 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301A_3 addressed to terminal #2", and the base station #4 of 301_4 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301A_4 addressed to terminal #2". By performing the above-described control (system adjustment, transmission directivity control), it is possible to increase the reception power of "signal 1301A_1 for wireless power transmission addressed to terminal #2," "signal 1301A_2 for wireless power transmission addressed to terminal #2," "signal 1301A_3 for wireless power transmission addressed to terminal #2," and "signal 1301A_4 for wireless power transmission addressed to terminal #2" at "antenna section 1_1 of 1213D_1_1," "antenna section 1_2 of 1213D_1_2," "antenna section 2_1 of 1213D_2_1," and "antenna section 2_2 of 1213D_2_2."

[0642] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0643] 17 shows an example of the relationship between base stations and terminals. It is assumed that base station #1 301_1, base station #2 301_2, base station #3 301_3, and base station #4 301_4 are transmitting power wirelessly to terminal #2 302_2.

[0644] 13B1, 13B2, 13B3, 13B4, and 13B5, 13B6, the base station #1 of 301_1, the base station #2 of 301_2, the base station #3 of 301_3, and the base station #4 of 301_4 transmit wireless power transmission signals using the (downlink) TDM method. Therefore, the base station #1 of 301_1 transmits a "wireless power transmission signal 1301B_1 addressed to terminal #2," the base station #2 of 301_2 transmits a "wireless power transmission signal 1301B_2 addressed to terminal #2," the base station #3 of 301_3 transmits a "wireless power transmission signal 1301B_3 addressed to terminal #2," and the base station #4 of 301_4 transmits a "wireless power transmission signal 1301B_4 addressed to terminal #2." Although "wireless power transmission signal 1301B_3 addressed to terminal #2" and "wireless power transmission signal 1301B_4 addressed to terminal #2" are not shown in "Figures 13B1, 13B2," "Figures 13B3, 13B4," and "Figures 13B5, 13B6," "wireless power transmission signal 1301B_3 addressed to terminal #2" and "wireless power transmission signal 1301B_4 addressed to terminal #2" are arranged on the time and frequency axes so as to realize a (downlink) TDM method wireless power transmission signal.

[0645] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12D. In Fig. 12D, U is 2, V1 is 2, and V2 is 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1, antenna unit 1_1 of 1213D_1_1, antenna unit 1_2 of 1213D_1_2," and "charging function unit 2 of 1211B_2, antenna unit 2_1 of 1213D_2_1, and antenna unit 2_2 of 1213D_2_2." It is assumed that terminal #2 of 302_2 also has other components.

[0646] For example, the "antenna unit 1_1 of 1213D_1_1" of terminal #2 of 302_2 receives the "signal 1301B_1 for wireless power transmission addressed to terminal #2" transmitted by base station #1 of 301_1. Also, the "antenna unit 1_2 of 1213D_1_2" of terminal #2 of 302_2 receives the "signal 1301B_2 for wireless power transmission addressed to terminal #2" transmitted by base station #2 of 301_2.

[0647] The "antenna unit 2_1 of 1213D_2_1" of terminal #2 302_2 receives the "signal 1301B_3 for wireless power transmission addressed to terminal #2" transmitted by base station #3 301_3. The "antenna unit 2_2 of 1213D_2_2" of terminal #2 302_2 receives the "signal 1301B_4 for wireless power transmission addressed to terminal #2" transmitted by base station #4 301_4.

[0648] As a result, the batteries are charged in the "charging function unit 1 of 1211B_1" and the "charging function unit 2 of 1211B_2."

[0649] At this time, base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, and base station #4 of 301_4 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be any of base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, and base station #4 of 301_4. Also, although "terminal" is described below, it means "terminal #2 of 302_2" here.

[0650] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0651] Terminal #2 of 302_2 having the configuration of FIG. 12D receives, at "antenna section 1_1 of 1213D_1_1," "wireless power transmission signal 1301B_1 addressed to terminal #2" transmitted by base station #1 of 301_1, at "antenna section 1_2 of 1213D_1_2," "wireless power transmission signal 1301B_2 addressed to terminal #2" transmitted by base station #2 of 301_2, at "antenna section 1_1 of 1213D_1_1," "wireless power transmission signal 1301B_3 addressed to terminal #2" transmitted by base station #3 of 301_3, at "antenna section 2_1 of 1213D_2_1," and "wireless power transmission signal 1301B_4 addressed to terminal #2" transmitted by base station #4 of 301_4, thereby performing charging.

[0652] At this time, the reception status of "wireless power transmission signal 1301B_1 addressed to terminal #2," "wireless power transmission signal 1301B_2 addressed to terminal #2," "wireless power transmission signal 1301B_3 addressed to terminal #2," and "wireless power transmission signal 1301B_4 addressed to terminal #2" will affect the charging efficiency (charging time).

[0653] The "antenna unit 1_1 of 1213D_1_1" receives the "wireless power transmission signal 1301B_1 addressed to terminal #2," and the "antenna unit 1_2 of 1213D_1_2" receives the "wireless power transmission signal 1301B_2 addressed to terminal #2." If high reception power is obtained from the "wireless power transmission signal 1301B_1 addressed to terminal #2" and the "wireless power transmission signal 1301B_2 addressed to terminal #2," efficient charging becomes possible. For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0654] Furthermore, "antenna unit 2_1 of 1213D_2_1" receives "wireless power transmission signal 1301B_3 addressed to terminal #2," and "antenna unit 2_2 of 1213D_2_2" receives "wireless power transmission signal 1301B_4 addressed to terminal #2." If high reception power is obtained from "wireless power transmission signal 1301B_3 addressed to terminal #2" and "wireless power transmission signal 1301B_4 addressed to terminal #2," efficient charging becomes possible. For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0655] At this time, the base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_1 addressed to terminal #2", the base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_2 addressed to terminal #2", the base station #3 of 301_3 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_3 addressed to terminal #2", and the base station #4 of 301_4 performs beam control (beam adjustment, transmission directivity control) of the "wireless power transmission signal 1301B_4 addressed to terminal #2". By performing the above-described control (bandwidth adjustment, transmission directivity control), it is possible to increase the reception power of "signal 1301B_1 for wireless power transmission addressed to terminal #2," "signal 1301B_2 for wireless power transmission addressed to terminal #2," "signal 1301B_3 for wireless power transmission addressed to terminal #2," and "signal 1301B_4 for wireless power transmission addressed to terminal #2" at "antenna section 1_1 of 1213D_1_1," "antenna section 1_2 of 1213D_1_2," "antenna section 2_1 of 1213D_2_1," and "antenna section 2_2 of 1213D_2_2."

[0656] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0657] 17 shows an example of the relationship between base stations and terminals. It is assumed that base station #1 301_1, base station #2 301_2, base station #3 301_3, and base station #4 301_4 are transmitting power wirelessly to terminal #2 302_2.

[0658] 13C1 and 13C2, the base station #1 of 301_1, the base station #2 of 301_2, the base station #3 of 301_3, and the base station #4 of 301_4 transmit (downlink) wireless power transmission signals using the FDM method. Therefore, the base station #1 of 301_1 transmits a "wireless power transmission signal 1311C_1 transmitted by the base station #1 to the terminal #2," the base station #2 of 301_2 transmits a "wireless power transmission signal 1311C_2 transmitted by the base station #2 to the terminal #2," the base station #3 of 301_3 transmits a "wireless power transmission signal 1311C_3 transmitted by the base station #3 to the terminal #2," and the base station #4 of 301_4 transmits a "wireless power transmission signal 1311C_4 transmitted by the base station #4 to the terminal #2." Note that Figures 13C1 and 13C2 do not show "wireless power transmission signal 1311C_3 transmitted by base station #3 to terminal #2" and "wireless power transmission signal 1311C_4 transmitted by base station #4 to terminal #2," but "wireless power transmission signal 1311C_3 transmitted by base station #3 to terminal #2" and "wireless power transmission signal 1311C_4 transmitted by base station #4 to terminal #2" are arranged on the time and frequency axes to realize a (downlink) FDM method wireless power transmission signal.

[0659] At this time, it is assumed that terminal #2 of 302_2 has the configuration shown in Fig. 12D. In Fig. 12D, U is 2, V1 is 2, and V2 is 2, and terminal #2 of 302_2 has "charging function unit 1 of 1211B_1, antenna unit 1_1 of 1213D_1_1, antenna unit 1_2 of 1213D_1_2," and "charging function unit 2 of 1211B_2, antenna unit 2_1 of 1213D_2_1, and antenna unit 2_2 of 1213D_2_2." It is assumed that terminal #2 of 302_2 also has other components.

[0660] For example, the "antenna unit 1_1 of 1213D_1_1" of terminal #2 of 302_2 receives the "signal 1311C_1 for wireless power transmission transmitted by base station #1 and addressed to terminal #2" transmitted by base station #1 of 301_1. Also, the "antenna unit 1_2 of 1213D_1_2" of terminal #2 of 302_2 receives the "signal 1311C_2 for wireless power transmission transmitted by base station #2 and addressed to terminal #2" transmitted by base station #2 of 301_2.

[0661] The "antenna unit 2_1 of 1213D_2_1" of terminal #2 of 302_2 receives the "signal 1311C_3 for wireless power transmission transmitted by base station #3 and addressed to terminal #2" transmitted by base station #3 of 301_3. Also, the "antenna unit 2_2 of 1213D_2_2" of terminal #2 of 302_2 receives the "signal 1311C_4 for wireless power transmission transmitted by base station #4 and addressed to terminal #2" transmitted by base station #4 of 301_4.

[0662] As a result, the batteries are charged in the "charging function unit 1 of 1211B_1" and the "charging function unit 2 of 1211B_2."

[0663] At this time, base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, and base station #4 of 301_4 may perform "phase adjustment and beam adjustment." An example of the operation at this time will be described below. Note that, although "base station" is described below, the "base station" may be any of base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, and base station #4 of 301_4. Also, although "terminal" is described below, it means "terminal #2 of 302_2" here.

[0664] FIG. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment."

[0665] Fig. 16 shows an example of communication between a base station and a terminal when the base station performs "phase adjustment and beam adjustment." Details have already been explained, so they will not be explained again. Below, a method for "phase adjustment and / or beam adjustment" in Fig. 16 will be explained.

[0666] The terminal #2 of 302_2 having the configuration of FIG. 12D receives, via the “antenna unit 1_1 of 1213D_1_1,” the “signal for wireless power transmission 1311C_1 transmitted by the base station #1 and addressed to the terminal #2” transmitted by the base station #1 of 301_1, and receives, via the “antenna unit 1_2 of 1213D_1_2,” the “signal for wireless power transmission 1311C_2 transmitted by the base station #2 and addressed to the terminal #2” transmitted by the base station #2 of 301_2. The signal is received by the "antenna section 2_1 of 1213D_2_1" and the "wireless power transmission signal 1311C_3 transmitted by base station #3 and addressed to terminal #2" transmitted by base station #3 of 301_3, and the "antenna section 2_2 of 1213D_2_2" receives the "wireless power transmission signal 1311C_4 transmitted by base station #4 and addressed to terminal #2" transmitted by base station #4 of 301_4, thereby performing charging.

[0667] At this time, the reception status of "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2," "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2," "wireless power transmission signal 1311C_3 transmitted by base station #3 to terminal #2," and "wireless power transmission signal 1311C_4 transmitted by base station #4 to terminal #2" will affect the charging efficiency (charging time).

[0668] The "antenna unit 1_1 of 1213D_1_1" receives the "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2," and the "antenna unit 1_2 of 1213D_1_2" receives the "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2." However, if high reception power is obtained from the "wireless power transmission signal 1311C_1 transmitted by base station #1 to terminal #2" and the "wireless power transmission signal 1311C_2 transmitted by base station #2 to terminal #2," efficient charging becomes possible. For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0669] Furthermore, "antenna unit 2_1 of 1213D_2_1" receives "wireless power transmission signal 1311C_3 transmitted by base station #3 to terminal #2," and "antenna unit 2_2 of 1213D_2_2" receives "wireless power transmission signal 1311C_4 transmitted by base station #4 to terminal #2." However, if high reception power is obtained from "wireless power transmission signal 1311C_3 transmitted by base station #3 to terminal #2" and "wireless power transmission signal 1311C_4 transmitted by base station #4 to terminal #2," efficient charging becomes possible. For this reason, communication between the base station and the terminals shown in FIG. 16 is performed.

[0670] At this time, the base station #1 of 301_1 performs beam control (beam adjustment, transmission directivity control) of "a wireless power transmission signal 1311C_1 transmitted by the base station #1 to the terminal #2", the base station #2 of 301_2 performs beam control (beam adjustment, transmission directivity control) of "a wireless power transmission signal 1311C_2 transmitted by the base station #2 to the terminal #2", the base station #3 of 301_3 performs beam control (beam adjustment, transmission directivity control) of "a wireless power transmission signal 1311C_3 transmitted by the base station #3 to the terminal #2", and the base station #4 of 301_4 performs beam control (beam adjustment, transmission directivity control) of "a wireless power transmission signal 1311C_4 transmitted by the base station #4 to the terminal #2". By performing the above-described control (bandwidth adjustment, transmission directivity control), it is possible to increase the reception power of "wireless power transmission signal 1311C_1 transmitted by base station #1 and addressed to terminal #2," "wireless power transmission signal 1311C_2 transmitted by base station #2 and addressed to terminal #2," "wireless power transmission signal 1311C_3 transmitted by base station #3 and addressed to terminal #2," and "wireless power transmission signal 1311C_4 transmitted by base station #4 and addressed to terminal #2" at "antenna section 1_1 of 1213D_1_1," "antenna section 1_2 of 1213D_1_2," "antenna section 2_1 of 1213D_2_1," and "antenna section 2_2 of 1213D_2_2."

[0671] Therefore, by performing "phase adjustment and / or beam adjustment" as shown in FIG. 16, it is possible to obtain the effect of improving charging efficiency.

[0672] 18A shows an example of communication between a base station (or TRP) (for example, base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, base station #4 of 301_4, etc.) and a terminal (for example, terminal #1 of 302_1, terminal #2 of 302_2, terminal #3 of 302_3, etc.) in FIG. 3A, FIG. 3C, FIG. 12A, FIG. 17, etc. It is assumed that the base station has already transmitted base station capability information to the terminal, and the terminal has already transmitted terminal capability information to the base station.

[0673] Based on the base station capability information, the terminal determines that the base station is capable of transmitting for wireless power transmission, and makes a "request for charging via wireless power transmission" to the base station (1851A). (Note that the terminal may make this request to one base station or to multiple base stations.) At this time, the terminal may also make a "request regarding a wireless power transmission method (SDM, TDM, FDM)," a "request regarding parallel charging," a "request regarding phase adjustment and / or beam adjustment," etc.

[0674] Upon receiving this request, the base station determines whether to transmit a wireless power transmission signal to the terminal (1801A). In this example, it is assumed that the base station has determined to transmit a wireless power transmission signal to the terminal.

[0675] Then, the base station determines the transmission method (SDM / TDM / FDM, phase adjustment, beam adjustment, etc.) for transmitting the wireless power transmission signal based on the terminal capability information (1802A).

[0676] The base station transmits the wireless power transmission signal to the terminal using the determined transmission method (1803A), thereby enabling the terminal to be efficiently charged.

[0677] 18B shows an example of communication between a base station (or TRP) (for example, base station #1 of 301_1, base station #2 of 301_2, base station #3 of 301_3, base station #4 of 301_4, etc.) and a terminal (for example, terminal #1 of 302_1, terminal #2 of 302_2, terminal #3 of 302_3, etc.) in FIG. 3A, FIG. 3C, FIG. 12A, FIG. 17, etc., which is different from FIG. 18A. It is assumed that the base station has already transmitted base station capability information to the terminal, and the terminal has already transmitted terminal capability information to the base station.

[0678] Based on the base station capability information, the terminal determines that the base station is capable of charging and communication via wireless power transmission, and makes a request for "charging and communication via wireless power transmission" to the base station (1851B). (Note that the terminal may make this request to one base station or to multiple base stations.) At this time, the terminal may also make a "request regarding a wireless power transmission method (SDM, TDM, FDM)," a "request regarding parallel charging," a "request regarding phase adjustment and / or beam adjustment," etc.

[0679] Upon receiving this request, the base station determines whether or not to perform "charging and communication via wireless power transmission" for the terminal (1801B). In this example, it is assumed that the base station has determined to perform "charging and communication via wireless power transmission" for the terminal.

[0680] Then, the base station determines the transmission method for "transmission and communication of wireless power transmission signals" based on the terminal capability information (1802B), such as the frequency to be used in communication, the frequency to be used in wireless power transmission, transmission parameters for communication, and transmission parameters for wireless power transmission.

[0681] The base station transmits the wireless power transmission signal and performs communication using the determined transmission method (1803B), which allows the terminal to perform communication and charging.

[0682] As described above, the base station transmits base station capability information to the terminal, the terminal transmits terminal capability information to the base station, and the base station and the terminal perform procedures including wireless power transmission based on the terminal capability information and the base station capability information, respectively, thereby achieving the effect of enabling accurate communication and wireless power transmission based on the base station capabilities and terminal capabilities.

[0683] As described above, when the base station and the TRP transmit a (downlink) SDM-based wireless power transmission signal, the terminal may charge in one charging unit or in multiple charging units. When the terminal charges in one charging unit, the base station and the TRP may perform beam control and phase adjustment. When the terminal charges in multiple charging units, the base station and the TRP may perform beam control.

[0684] In addition, when the base station or TRP transmits a wireless power transmission signal using the (downlink) TDM method, the terminal may charge using multiple charging units or one charging unit. In either case, the base station or TRP may perform beam control.

[0685] When a base station or a TRP transmits a (downlink) FDM wireless power transmission signal, the terminal may charge in multiple charging units or in one charging unit. In either case, the base station or the TRP may perform beam control.

[0686] From the above, the base station and the terminal can exchange the following information.

[0687] 19A shows an example of communication between a base station (or TRP) and a terminal (e.g., terminal #2 of 302_2). Note that the terminal may communicate with one base station (or TRP) or multiple base stations (or TRPs).

[0688] 19A, the terminal transmits information about the reception status to the base station (1951A). Note that the information about the reception status may include, but is not limited to, "the reception status of the signal transmitted by the base station, information about the channel status, information about the amount of charge, etc."

[0689] The base station obtains information on the reception status of signals transmitted by the terminal (1901A). Then, based on this information and the like, the base station determines a transmission method for wireless power transmission signals to be transmitted to the terminal (1902A). Note that the transmission method for wireless power transmission signals may include information such as "regarding the number of wireless power transmission signals to be transmitted," "regarding whether to use SDM, TDM, or FDM to transmit wireless power transmission signals," "regarding whether to perform parallel charging," "regarding the implementation of beam control (beam adjustment)," and "regarding whether to perform phase adjustment."

[0690] Then, the base station transmits the determined "information on the transmission method of the wireless power transmission signal" to the terminal (1903A).

[0691] The terminal receives the "information on the transmission method of the wireless power transmission signal" transmitted by the base station (1952A). Then, based on the "information on the transmission method of the wireless power transmission signal," the terminal issues control instructions to each component of the terminal for charging the battery. Note that a specific configuration example of the terminal has already been described.

[0692] The base station transmits a wireless power transmission signal based on the determined "transmission method for a wireless power transmission signal" (1904A).

[0693] The terminal receives the wireless power transmission signal transmitted by the base station and begins charging the battery (1953).

[0694] 19B shows an example of communication between a base station (or TRP) and a terminal (e.g., terminal #2 of 302_2) that is different from that shown in FIG. 19A. The terminal may communicate with one base station (or TRP), or may communicate with multiple base stations (or TRPs). In FIG. 19B, the same numbers are used for components that operate in the same way as those in FIG. 19A, and since they have already been described, some of the description will be omitted.

[0695] 19B differs from FIG. 19A in that the terminal transmits "request information for a transmission method of a wireless power transmission signal" to the base station (1961B). Note that the "request information for a transmission method of a wireless power transmission signal" may include "request information for the number of wireless power transmission signals to be transmitted," "request information regarding which method of SDM, TDM, or FDM to use to transmit the wireless power transmission signal," "request information regarding whether to perform parallel charging," "request information regarding the performance of beam control (beam adjustment)," and "request information regarding whether to perform phase adjustment."

[0696] The base station receives the "request information for the transmission method of the wireless power transmission signal" transmitted by the terminal (1911B).

[0697] Then, the base station determines a transmission method of a wireless power transmission signal to be transmitted to the terminal based on the "information on the reception state," "request information on the transmission method of the wireless power transmission signal," etc. (1902A). Note that the transmission method of the wireless power transmission signal may include information such as "regarding the number of wireless power transmission signals to be transmitted," "regarding whether the wireless power transmission signal is to be transmitted by SDM, TDM, or FDM," "regarding whether parallel charging is to be performed," "regarding the performance of beam control (beam adjustment)," and "regarding whether phase adjustment is to be performed."

[0698] The other parts have already been explained, so the explanation will be omitted.

[0699] As shown in Figures 19A and 19B, by communicating between a base station and a terminal, it is possible to switch the transmission method of wireless power transmission signals between the base station and the terminal depending on the charging status of the terminal, the radio wave reception status of the terminal, etc.

[0700] Depending on the charging status of the terminal, the reception status of the radio waves of the terminal, etc., the base station switches the transmission method of the wireless power transmission signal depending on the time and / or frequency, for example, by switching from among "transmission of the wireless power transmission signal by SDM, transmission of the wireless power transmission signal by TDM, and transmission of the wireless power transmission signal by FDM" and transmitting the wireless power transmission signal.

[0701] Furthermore, the base station may switch the following depending on the time and / or frequency, depending on the charging status of the terminal, the radio wave reception status of the terminal, etc.: the number of wireless power transmission signals to be transmitted; whether or not to perform processing for parallel charging; whether or not to perform beam control; whether or not to perform phase adjustment; and the transmission directivity during beam control.

[0702] This allows the terminal to switch, depending on time and / or frequency, the following: - the number of wireless power transmission signals to be received - whether or not to perform processing for parallel charging - whether or not to perform beam control - whether or not to perform phase adjustment - reception directivity during beam control

[0703] Therefore, by switching the transmission method of the wireless power transmission signal between the base station and the terminal depending on the charging status of the terminal, the radio wave reception status of the terminal, etc., it is possible to perform wireless power transmission and charging that is appropriate for the situation, thereby achieving the effect of enabling highly efficient charging.

[0704] In the above, the transmission of a wireless power transmission signal by a base station using SDM, the transmission of a wireless power transmission signal by a base station using TDM, and the transmission of a wireless power transmission signal by a base station using FDM have been explained, and as explained at that time, the base station and the terminals exchange information with each other, that is, the base station and the terminals communicate with each other. Also, while an example of communication between a base station and a terminal has already been explained, the following will explain an example of communication between a base station that is different from the above explanation.

[0705] Here, a case will be described in which the frequency used by the communication modulated signal transmitted by the base station is different from the frequency used by the wireless power transmission signal transmitted by the base station.

[0706] It is assumed that the frequency (band) used for communication between the base station and the terminal is f1, and the frequency (band) used by the base station to wirelessly transmit power to the terminal is f2.

[0707] At this time, the communication between the base station and the terminal may be, for example, FDD (Frequency Division Duplex) or TDD (Time Division Duplex).

[0708] For example, consider base station #1 of 301_1 and terminal #2 of 302_2 in Fig. 3A . In this case, as shown in Fig. 20A , communication between base station #1 of 301_1 and terminal #2 of 302_2 uses frequency (band) f1, and the frequency (band) used by base station #1 of 301_1 to transmit wireless power to terminal #2 of 302_2 is f2.

[0709] FIG. 20B shows an example of communication between a base station (for example, base station #1 of 301_1) and a terminal (for example, terminal #2 of 302_2) when the base station performs transmit beamforming.

[0710] When a base station performs transmit beamforming and transmits a modulated signal for communication, the following exchange may take place.

[0711] The base station transmits a reference signal using frequency (band) f1 (2001B).

[0712] The terminal receives the reference signal and estimates, for example, the channel condition (2051B).

[0713] Then, the terminal transmits information necessary for the base station to perform transmit beamforming (for example, information on the estimated channel state) to the base station using frequency (band) f1 (2052B).

[0714] The base station receives the information (2052B) transmitted by the terminal and determines the transmission beamforming method (direction of directivity, specific processing of directivity control) (2002B).

[0715] The base station performs transmission beamforming and transmits a modulated signal for communication to the terminal using frequency (band) f1 (2003B).

[0716] When the base station performs transmit beamforming and transmits a signal for wireless power transmission, the following exchange may take place.

[0717] The base station transmits a reference signal using frequency (band) f2 (2001B).

[0718] The terminal receives the reference signal and estimates, for example, the channel condition (2051B).

[0719] Then, the terminal transmits information necessary for the base station to perform transmit beamforming (e.g., information on the estimated channel conditions) to the base station using frequency (band) f1 (or f2) (2052B).

[0720] The base station receives the information (2052B) transmitted by the terminal and determines the transmission beamforming method (direction of directivity, specific processing of directivity control) (2002B).

[0721] The base station performs transmission beamforming and transmits a wireless power transmission signal to the terminal using frequency (band) f2 (2003B).

[0722] Figure 20C shows an example different from Figure 20B of interactions between a base station (e.g., base station #1 of 301_1) and a terminal (e.g., terminal #2 of 302_2) when the base station performs transmit beamforming.

[0723] When a base station performs transmit beamforming and transmits a modulated signal for communication, the following exchange may take place.

[0724] The terminal transmits a reference signal using frequency (band) f1 (2051C).

[0725] The base station receives the reference signal and estimates, for example, the channel conditions (2001C).

[0726] The base station determines the transmission beamforming method (direction of directivity, specific processing of directivity control) based on the channel state (2002C).

[0727] The base station performs transmission beamforming and transmits a modulated signal for communication to the terminal using frequency (band) f1 (2003C).

[0728] When the base station performs transmit beamforming and transmits a signal for wireless power transmission, the following exchange may take place.

[0729] The terminal transmits a reference signal using frequency (band) f2 (2051C).

[0730] The base station receives the reference signal and estimates, for example, the channel conditions (2001C).

[0731] The base station determines the transmission beamforming method (direction of directivity, specific processing of directivity control) based on the channel state (2002C).

[0732] The base station performs transmission beamforming and transmits a wireless power transmission signal to the terminal using frequency (band) f2 (2003C).

[0733] In addition, if the base station is a device capable of performing transmit beamforming and the terminal is in "battery level reduction mode" and the base station and terminal exchange both communication and wireless power transmission, the base station will exchange with the terminal for transmit beamforming, as exemplified above, to transmit modulated signals for communication and signals for wireless power transmission.

[0734] In the following, a case will be described in which the base station performs transmission beamforming and the terminal performs reception beamforming.

[0735] 20D shows an example of communication between a base station and a terminal when a base station (e.g., base station #1 of 301_1) performs transmission beamforming and a terminal (e.g., terminal #2 of 302_2) performs reception beamforming. In FIG. 20D, the same numbers are used for components that operate in the same way as in FIG. 20B, and some explanations will be omitted.

[0736] When a base station performs transmit beamforming and transmits a modulated signal for communication, the following exchange may take place.

[0737] The base station transmits a reference signal using frequency (band) f1 (2001B).

[0738] The terminal receives the reference signal and estimates, for example, the channel condition (2051B).

[0739] Then, the terminal transmits information necessary for the base station to perform transmit beamforming (for example, information on the estimated channel state) to the base station using frequency (band) f1 (2052B).

[0740] The base station receives the information (2052B) transmitted by the terminal and determines the transmission beamforming method (direction of directivity, specific processing of directivity control) (2002B).

[0741] The base station performs transmission beamforming and transmits a reference signal to the terminal using frequency (band) f1 (2003D).

[0742] The terminal receives the reference signal transmitted by the base station and estimates, for example, the channel state (2053D).The terminal then determines the reception beamforming method (direction of directivity and specific processing for directivity control) (2054D).

[0743] The base station performs transmission beamforming and transmits a modulated signal for communication to the terminal using frequency (band) f1 (2004D).

[0744] The terminal performs receive beamforming and receives the communication modulated signal transmitted by the base station.

[0745] When the base station performs transmit beamforming and transmits a signal for wireless power transmission, the following exchange may take place.

[0746] The base station transmits a reference signal using frequency (band) f2 (2001B).

[0747] The terminal receives the reference signal and estimates, for example, the channel condition (2051B).

[0748] Then, the terminal transmits information necessary for the base station to perform transmit beamforming (e.g., information on the estimated channel conditions) to the base station using frequency (band) f1 (or f2) (2052B).

[0749] The base station receives the information (2052B) transmitted by the terminal and determines the transmission beamforming method (direction of directivity, specific processing of directivity control) (2002B).

[0750] The base station performs transmission beamforming and transmits a reference signal to the terminal using frequency (band) f2 (2003D).

[0751] The terminal receives the reference signal transmitted by the base station and estimates, for example, the channel state (2053D).The terminal then determines the reception beamforming method (direction of directivity and specific processing for directivity control) (2054D).

[0752] The base station performs transmission beamforming and transmits a wireless power transmission signal to the terminal using frequency (band) f2 (2004D).

[0753] The terminal performs reception beamforming and receives the wireless power transmission signal transmitted by the base station.

[0754] Fig. 20E shows an example of communication between a base station and a terminal when a base station (e.g., base station #1 of 301_1) performs transmission beamforming and a terminal (e.g., terminal #2 of 302_2) performs reception beamforming, which is different from Fig. 20D. Note that in Fig. 20E, the same numbers are used for components that operate in the same way as in Fig. 20C, and some explanations will be omitted.

[0755] When a base station performs transmit beamforming and transmits a modulated signal for communication, the following exchange may take place.

[0756] The terminal transmits a reference signal using frequency (band) f1 (2051C).

[0757] The base station receives the reference signal and estimates, for example, the channel conditions (2001C).

[0758] The base station determines the transmission beamforming method (direction of directivity, specific processing of directivity control) based on the channel state (2002C).

[0759] The base station performs transmission beamforming and transmits a reference signal to the terminal using frequency (band) f1 (2003E).

[0760] The terminal receives the reference signal transmitted by the base station and estimates, for example, the channel state (2052E).The terminal then determines a reception beamforming method (direction of directivity and specific processing for directivity control) (2053E).

[0761] The base station performs transmission beamforming and transmits a modulated signal for communication to the terminal using frequency (band) f1 (2004E).

[0762] The terminal performs receive beamforming and receives the communication modulated signal transmitted by the base station.

[0763] When the base station performs transmit beamforming and transmits a signal for wireless power transmission, the following exchange may take place.

[0764] The terminal transmits a reference signal using frequency (band) f2 (2051C).

[0765] The base station receives the reference signal and estimates, for example, the channel conditions (2001C).

[0766] The base station determines the transmission beamforming method (direction of directivity, specific processing of directivity control) based on the channel state (2002C).

[0767] The base station performs transmission beamforming and transmits a reference signal to the terminal using frequency (band) f2 (2003E).

[0768] The terminal receives the reference signal transmitted by the base station and estimates, for example, the channel state (2052E).The terminal then determines a reception beamforming method (direction of directivity and specific processing for directivity control) (2053E).

[0769] The base station performs transmission beamforming and transmits a wireless power transmission signal to the terminal using frequency (band) f2 (2004E).

[0770] The terminal performs reception beamforming and receives the wireless power transmission signal transmitted by the base station.

[0771] In addition, if the base station is a device capable of performing transmit beamforming and the terminal is in "battery level reduction mode" and the base station and terminal exchange both communication and wireless power transmission, the base station will exchange with the terminal for transmit beamforming, as exemplified above, to transmit modulated signals for communication and signals for wireless power transmission.

[0772] By carrying out these procedures, communication between the base station and the terminal with high data reception quality is possible. Note that, the same can be implemented when the base station (or TRP) (for example, the base station #1 of 301_1, the base station #2 of 301_2, the base station #3 of 301_3, the base station #4 of 301_4, etc.) and the terminal (for example, the terminal #1 of 302_1, the terminal #2 of 302_2, the terminal #3 of 302_3, etc.) in Figures 3A, 3C, 12A, 17, etc.) exchanges the above-mentioned information.

[0773] Next, the relationship between a base station (or TRP) that performs wireless power transmission and a terminal, and the relationship between a base station (or TRP) that performs communication and a terminal will be described.

[0774] Figure 21A shows a first example of the relationship between a base station (or a TRP) and a terminal. In Figure 21A, elements that operate in the same manner as in Figures 3A, 3C, 12A, 17, etc. are assigned the same numbers.

[0775] In Fig. 21A, the base station #1 of 301_1 is transmitting wireless power to the terminal #2 of 302_2, and the base station #2 of 301_2 is transmitting wireless power to the terminal #2 of 302_2. This point has already been explained using Fig. 12A, etc. For example, the base station (or TRP) transmits a wireless power transmission signal using one of the above-mentioned SDM, TDM, or FDM methods. At this time, as already explained, the base station and the terminal need to exchange (communicate) data and information.

[0776] In FIG. 21A, the base stations that communicate with terminal #2 of 302_2 are base station #1 of 301_1 and base station #2 of 301_2.

[0777] Therefore, when base station #1 of 301_1 and terminal #2 of 302_2 communicate with each other, base station #1 of 301_1 can transmit a wireless power transmission signal to terminal #2 of 302_2, and terminal #2 of 302_2 can charge its battery. Note that an example of specific interactions (communications) between base station #1 of 301_1 and terminal #2 of 302_2 has already been described, so description thereof will be omitted.

[0778] Then, by communication between base station #2 of 301_2 and terminal #2 of 302_2, base station #2 of 301_2 becomes able to transmit a wireless power transmission signal to terminal #2 of 302_2, and terminal #2 of 302_2 becomes able to charge its battery. Note that an example of specific interactions (communications) between base station #2 of 301_2 and terminal #2 of 302_2 has already been described, and therefore description thereof will be omitted.

[0779] The base station #1 of 301_1 and the base station #2 of 301_2 transmit wireless power transmission signals using any of the above-mentioned SDM, TDM, and FDM methods, so that the base station #1 of 301_1 and the base station #2 of 301_2 communicate with each other. At this time, the base station #1 of 301_1 and the base station #2 of 301_2 may communicate directly or via another device. Note that the communication between the base station #1 of 301_1 and the base station #2 of 301_2 may be wireless communication or wired communication.

[0780] By base station #1 of 301_1 and base station #2 of 301_2 communicating with each other, the frequency and timing of the wireless power transmission signal transmitted by base station #1 of 301_1 and the frequency and timing of the wireless power transmission signal transmitted by base station #2 of 301_2 can be controlled, thereby making it possible to transmit the wireless power transmission signal using any of the above-mentioned SDM, TDM, or FDM methods.

[0781] In FIG. 21A, base station #1 of 301_1 and base station #2 of 301_2 will perform "communication" and "transmission of a signal for wireless power transmission," and specific examples of the operations at this time have already been explained.

[0782] Furthermore, terminal #2 of 302_2 in FIG. 21A will perform "communication" and "charging by wireless power transmission signal," and specific examples of the operations at this time have already been described.

[0783] Figure 21B shows a second example of the relationship between a base station (or a TRP) and a terminal. In Figure 21B, elements that operate in the same manner as in Figures 3A, 3C, 12A, 17, etc. are assigned the same numbers.

[0784] In Fig. 21B, the base station #1 of 301_1 is transmitting wireless power to the terminal #2 of 302_2, and the base station #2 of 301_2 is transmitting wireless power to the terminal #2 of 302_2. This point has already been explained using Fig. 12A, etc. For example, the base station (or TRP) transmits a wireless power transmission signal using one of the above-mentioned SDM, TDM, or FDM methods. At this time, as already explained, the base station and the terminal need to exchange (communicate) data and information.

[0785] In FIG. 21B, the base station that communicates with terminal #2 of 302_2 is base station #1 of 301_1.

[0786] Therefore, when base station #1 of 301_1 and terminal #2 of 302_2 communicate with each other, base station #1 of 301_1 becomes able to transmit a wireless power transmission signal to terminal #2 of 302_2, and terminal #2 of 302_2 becomes able to charge its battery.

[0787] In addition, base station #2 of 301_2 and terminal #2 of 302_2 communicate via base station #1 of 301_1, which enables base station #2 of 301_2 to transmit a wireless power transmission signal to terminal #2 of 302_2, and terminal #2 of 302_2 to charge its battery.

[0788] The base station #1 of 301_1 and the base station #2 of 301_2 transmit wireless power transmission signals using any of the above-mentioned SDM, TDM, and FDM methods, so that the base station #1 of 301_1 and the base station #2 of 301_2 communicate with each other. At this time, the base station #1 of 301_1 and the base station #2 of 301_2 may communicate directly or via another device. Note that the communication between the base station #1 of 301_1 and the base station #2 of 301_2 may be wireless communication or wired communication.

[0789] By base station #1 of 301_1 and base station #2 of 301_2 communicating with each other, the frequency and timing of the wireless power transmission signal transmitted by base station #1 of 301_1 and the frequency and timing of the wireless power transmission signal transmitted by base station #2 of 301_2 can be controlled, thereby making it possible to transmit the wireless power transmission signal using any of the above-mentioned SDM, TDM, or FDM methods.

[0790] An example of communication between "base station #1 of 301_1, base station #2 of 301_2, and terminal #2 of 302_2" when base station #1 of 301_1, base station #2 of 301_2, and terminal #2 of 302_2 are in the state shown in FIG. 21B will be explained using FIG. 22A.

[0791] Before the exchange of FIG. 22A, it is assumed that base station #1 of 301_1 and terminal #2 of 302_2 have completed sharing of "base station capability information of base station #1 of 301_1 and terminal capability information of terminal #2 of 302_2."

[0792] The base station #1 of 301_1 transmits the terminal capability information of the terminal #2 of 302_2 that it holds to the base station #2 of 301_2 (2210A).

[0793] Accordingly, the base station #2 of 301_2 obtains the terminal capability information of the terminal #2 of 302_2 (2220A).

[0794] The base station #2 of 301_2 transmits its own base station capability information to the base station #1 of 301_1 (2221A).

[0795] Then, the base station #1 of 301_1 transmits the base station capability information of the base station #2 of 301_2 to the terminal #2 of 302_2 (2211A).

[0796] The terminal #2 of 302_2 obtains the base station capability information of the base station #2 of 301_2 (2250A).

[0797] Terminal #2 of 302_2 transmits information on the reception status to base station #1 of 301_1 (2251A). Note that an example of the information on the reception status has already been described.

[0798] The base station #1 of 301_1 obtains the information on the reception state transmitted by the terminal #2 of 302_2 (2212A).

[0799] Then, the base station #1 of 301_1 determines the transmission method of the wireless power transmission signal based on, for example, its own base station capability, base station capability information of the base station #2 of 301_2, terminal capability information of the terminal #2 of 302_2, information on the reception state, etc. (2213A). Note that examples of the transmission method of the wireless power transmission signal have already been described.

[0800] Then, the base station #1 of 301_1 transmits information on the determined transmission method of the wireless power transmission signal to the base station #2 of 301_2 (2214A). The base station #2 of 301_2 obtains information on the transmission method of the wireless power transmission signal transmitted by the base station #1 of 301_1 (2222A).

[0801] The base station #1 of 301_1 transmits information about the determined transmission method of the wireless power transmission signal to the terminal #2 of 302_2 (2215A).

[0802] Terminal #2 of 302_2 obtains information about the transmission method of the wireless power transmission signal transmitted by base station #1 of 301_1 (2252A). Accordingly, terminal #2 of 302_2 completes preparations to receive "the wireless power transmission signal transmitted by base station #1 of 301_1 and / or the wireless power transmission signal transmitted by base station #2 of 301_2."

[0803] Then, the base station #1 of 301_1 transmits the wireless power transmission signal to the terminal #2 of 302_2 using the determined transmission method of the wireless power transmission signal (2216A). Also, the base station #2 of 301_2 transmits the wireless power transmission signal to the terminal #2 of 302_2 using the determined transmission method of the wireless power transmission signal (2223A).

[0804] At this time, the "wireless power transmission signal transmitted by base station #1 of 301_1 and the wireless power transmission signal transmitted by base station #2 of 301_2" are transmitted, for example, using any of the above-mentioned SDM, TDM, or FDM methods.

[0805] Then, terminal #2 at 302_2 is charged by the wireless power transmission signal transmitted by base station #1 at 301_1 and the wireless power transmission signal transmitted by base station #2 at 301_2 (2253A). Note that the specific method of charging has already been described.

[0806] Figure 22B is a different example from Figure 22A of the exchange between "base station #1 of 301_1, base station #2 of 301_2, and terminal #2 of 302_2" when base station #1 of 301_1, base station #2 of 301_2, and terminal #2 of 302_2 are in the state shown in Figure 21B. In Figure 22B, elements that operate in the same way as in Figure 22A are given the same numbers, and some explanations will be omitted.

[0807] Before the exchange of FIG. 22B, it is assumed that base station #1 of 301_1 and terminal #2 of 302_2 have completed sharing of "base station capability information of base station #1 of 301_1 and terminal capability information of terminal #2 of 302_2."

[0808] The difference between Figure 22B and Figure 22A is that, as shown in Figure 22B, termina...

Claims

1. A power receiving device comprising: a receiving unit that receives a first power transmission signal and a second power transmission signal transmitted by a first power transmission device and a second power transmission device, respectively, using a predetermined multiplex transmission method; and a charging unit that performs charging using the first power transmission signal and the second power transmission signal.

2. The power receiving device according to claim 1, wherein the predetermined multiplex transmission method is a spatial multiplex transmission method, a time multiplex transmission method, a frequency multiplex transmission method, or a combination of two or more of a spatial multiplex transmission method, a time multiplex transmission method, and a frequency multiplex transmission method.

3. The power receiving device described in claim 1, wherein the receiving unit receives the first power transmission signal and the second power transmission signal that have been phase-adjusted and / or beam-adjusted, and the charging unit performs charging using a composite signal of the first power transmission signal and the second power transmission signal.

4. The power receiving device described in claim 1, wherein the charging is single-system charging or multiple-system charging including at least a first system charging and a second system charging, and when the charging is single-system charging, the charging unit charges the single system using the first power transmission signal and the second power transmission signal, and when the charging is multiple-system charging, the charging unit charges at least the first system using the first power transmission signal and charges the second system using the second power transmission signal.

5. The power receiving device described in claim 1, wherein the receiving unit receives a communication signal for receiving the first power transmission signal and the second power transmission signal from a communication device, and receives the first power transmission signal and the second power transmission signal based on the communication signal.

6. A power receiving method, in which a power receiving device receives a first power transmission signal and a second power transmission signal transmitted by a first power transmission device and a second power transmission device, respectively, using a predetermined multiplex transmission method, and charges using the first power transmission signal and the second power transmission signal.

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