Terminal, base station, wireless power transfer system, power reception method, and power transmission method

Abstract

A terminal according to one aspect of the present disclosure is capable of charging in a first mode and charging in a second mode, and comprises: a reception unit that receives a signal for power transfer in accordance with charging in the first mode or charging in the second mode, the signal being transmitted by a first base station and a second base station; and a charging unit that charges the terminal using the signal for power transfer.

Description

Terminal, base station, wireless power transmission system, power receiving method, and power transmission method

[0001] The present disclosure relates to a terminal, a base station, a wireless power transmission system, a power receiving method, and a power transmitting method.

[0002] For example, Non-Patent Document 1 discloses that, as shown in Fig. 36, multiple wireless power transmission devices (wireless power transmitting devices) transmit signals for wireless power transmission, and a power receiving device uses the signals for wireless power transmission to charge the device. At this time, the multiple wireless power transmission devices perform phase adjustment on the signals for wireless power transmission.

[0003] Fundamental Study on Phase-Controlled Cooperative Power Transmission Using Multiple Access Points, 80th National Convention of Information Processing Society of Japan

[0004] However, when the radio wave propagation environment and the state of the power receiving device are taken into consideration, it is desirable to provide a system that includes a highly flexible wireless power transmitting device and power receiving device that enables highly efficient charging.

[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 terminal according to one aspect of the present disclosure is a terminal capable of charging in a first mode and charging in a second mode, and includes a receiving unit that receives a power transmission signal corresponding to charging in the first mode or charging in the second mode transmitted by a first base station and a second base station, and a charging unit that charges the terminal using the power transmission signal.

[0007] A base station according to one embodiment of the present disclosure includes a control unit that determines transmission corresponding to charging in a first mode or transmission corresponding to charging in a second mode in order to charge a terminal capable of charging in the first mode and the second mode, and a transmission unit that transmits to the terminal a power transmission signal corresponding to the determined transmission corresponding to charging in the first mode or transmission corresponding to charging in the second mode, which is also transmitted to the terminal by another base station.

[0008] A wireless power transmission system according to one aspect of the present disclosure is a wireless power transmission system comprising a first base station, a second base station, and a terminal capable of charging in a first mode and a second mode, wherein a transmitter provided in the first base station and a transmitter provided in the second base station transmit a power transmission signal corresponding to charging in the first mode or charging in the second mode to the terminal, a receiver provided in the terminal receives the power transmission signal transmitted by the transmitter provided in the first base station and the transmitter provided in the second base station, and a charging unit provided in the terminal charges the terminal using the power transmission signal.

[0009] In a power receiving method according to one aspect of the present disclosure, a terminal capable of charging in a first mode and a second mode receives a power transmission signal corresponding to charging in the first mode or charging in the second mode, transmitted by a first base station and a second base station, and charges the terminal using the power transmission signal.

[0010] In a power transmission method according to one aspect of the present disclosure, a base station determines a transmission corresponding to charging in a first mode or a transmission corresponding to charging in a second mode in order to charge a terminal capable of charging in a first mode and a second mode, and another base station also transmits to the terminal a power transmission signal corresponding to the determined transmission corresponding to charging in the first mode or the determined transmission corresponding to charging in the second mode.

[0011] 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.

[0012] According to non-limiting examples of the present disclosure, it is possible to provide a wireless power transmission system capable of highly efficient charging.

[0013] 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.

[0014] 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.FIG. 2H shows an example of the configuration of the "charging and communication processing unit" in FIG. 2H. FIG. 2H shows an example of the relationship between a base station and a terminal. FIG. 2H shows an example of the relationship between a base station and a terminal. FIG. 2H shows an example of the relationship between a base station and a terminal. FIG. 2H shows an example of the relationship between a base station and a terminal. FIG. 2H shows an example of the relationship between a base station and a terminal. FIG. 2H shows an example of the relationship between a base station and a terminal. 1 shows an example of the time and frequency arrangement of a communication modulation signal and a wireless power transmission signal transmitted by a base station. 2 shows an example of the time and frequency arrangement of a wireless power transmission signal transmitted by base station #1 and a wireless power transmission signal transmitted by base station #2. 3 shows an example of the time and frequency arrangement of a wireless power transmission signal transmitted by base station #1 and a wireless power transmission signal transmitted by base station #2. 4 shows an example of the time and frequency arrangement of a wireless power transmission signal transmitted by base station #1 and a wireless power transmission signal transmitted by base station #2. 5A1, 5A2, 5A3, and 5A4 show examples of time and frequency allocation of wireless power transmission signals transmitted by base station #2. FIGS. 5A1, 5A2, 5A3, and 5A4 show examples of (sub)carrier states when the wireless power transmission signals transmitted by base station #1 and base station #2 use a multicarrier system. FIGS. 5A1, 5A2, 5A3, and 5A4 show examples of (sub)carrier states when the wireless power transmission signals transmitted by base station #1 and base station #2 use a multicarrier system.5A4 is a diagram showing an example of the state of (sub)carriers when the wireless power transmission signal transmitted by base station #1 and the wireless power transmission signal transmitted by base station #2 use a multi-carrier system. FIG. 5B is a diagram showing a first example of the state when base station #1 and base station #2 transmit wireless power transmission signals to terminal #1. FIG. 5C is a diagram showing a first example of the state when base station #1 and base station #2 transmit wireless power transmission signals to terminal #1. FIG. 5D is a diagram showing an example of a screen displayed on terminal #1 when terminal #1 is Type 1_3. FIG. 5E is a diagram showing an example of the configuration of wireless power transmission signals transmitted by base station #1 and base station #2 in FIGS. 3A, 3B, 3C, 3D, and 3E. FIG. 5E is a diagram showing an example of the arrangement on the time and frequency axes of wireless power transmission signals including "other signals" and "wireless power transmission reference signals". FIG. 5F is a diagram showing an example of the arrangement on the time and frequency axes of wireless power transmission signals including "other signals" and "wireless power transmission reference signals". 3A, 3B, 3C, 3D, and 3E show an example of arrangement of wireless power transmission signals including "other signals" and "wireless power transmission reference signals" on the time and frequency axes. FIG. 3B shows an example of arrangement of wireless power transmission signals including "other signals" and "wireless power transmission reference signals" on the time and frequency axes. FIG. 3C shows an example of arrangement of wireless power transmission signals including "other signals" and "wireless power transmission reference signals" on the time and frequency axes. 9B shows an example of the state on the time axis when a signal is transmitted using SDM. FIG. 9A shows an example of the configuration of wireless power transmission reference signal #1 and wireless power transmission reference signal #2 in FIG. 9A. FIG. 9B shows an example of the configuration of wireless power transmission reference signal #1 and wireless power transmission reference signal #2 in FIG. 9A that is different from FIG. 9B1. When base station #1 transmits wireless power transmission reference signal #1 and base station #2 transmits wireless power transmission reference signal #2 in FIGS. 3A, 3B, 3C, 3D, and 3E, in-phase combining is performed at terminal #1.3A, 3B, 3C, 3D, and 3E. FIG. 3B shows an example of the state of received power when anti-phase combining is performed. FIG. 3C shows an example of the configuration of a base station that enables terminal #1 to receive signals in a state close to in-phase combining. FIG. 3D shows an example of the procedure by which base station #1 and base station #2 in FIGS. 3A, 3B, 3C, 3D, and 3E perform phase adjustment. FIG. 3E shows an example of the exchange when base station #1 and base station #2 in FIGS. 3A, 3B, 3C, 3D, and 3E perform phase adjustment on a wireless power transmission reference signal. FIG. 3D shows an example of the procedure by which base station #1 and base station #2 in FIGS. 3A, 3B, 3C, 3D, and 3E perform phase adjustment on a wireless power transmission reference signal. 3A, 3B, 3C, 3D, and 3E show an example of communication when base station #1 and base station #2 perform phase adjustment on a wireless power transmission reference signal. 3B shows an example of the state of received power at terminal #1 when terminal #1 moves and multiple base stations transmit phase-adjusted wireless power transmission reference signals. 3C shows an example of communication when base station #1 and base station #2 perform transmission timing adjustment on a wireless power transmission reference signal (which may be a wireless power transmission signal) in 3A, 3B, 3C, 3D, and 3E. 3A, 3B, 3C, 3D, and 3E show an example of the configuration of base station #1 and base station #2 when the base station #1 and base station #2 transmit a wireless power transmission signal. FIG. 3B shows an example of the state on the time axis when the base station #1 and base station #2 in FIG. 3A, 3B, 3C, 3D, and 3E transmit a wireless power transmission signal. FIG. 3C shows an example of the state on the time axis when terminal #1 receives wireless power transmission signal #1 transmitted by base station #1 and wireless power transmission signal #2 transmitted by base station #2. FIG. 3D shows an example of the exchange when terminal #1 in FIG. 3A, 3B, 3C, 3D, and 3E makes a request for phase adjustment. 3A, 3B, 3C, 3D, and 3E show an example of an exchange when transmitting mode setting information regarding a method for transmitting a wireless power transmission signal. FIG. 3B shows an example of an exchange when terminal #1 in FIG. 3A, 3B, 3C, 3D, and 3E transmits mode setting information regarding a method for transmitting a wireless power transmission signal. FIG. 3C shows an example of the state of received power at terminal #1 when base station #1 transmits wireless power transmission reference signal #1 and base station #2 transmits wireless power transmission reference signal #2. FIG. 3D shows an example of a screen displayed on terminal #1. FIG. 3A, 3B, 3C, 3D, and 3E show an example of a screen displayed on terminal #1.FIG. showing an example of the relationship of terminal #1 that receives a signal for power transmission transmitted by a device for communication and charges a battery. FIG. showing an example of the configuration of terminal #1 in FIG. 19A. FIG. showing an example different from FIG. 19B of the configuration of terminal #1 in FIG. 19A. FIG. showing an example different from FIGS. 19B and 19C of the configuration of terminal #1 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #1 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #2 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #1 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #2 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #1 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #2 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #1 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #2 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #1 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #2 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #1 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signal transmitted by base station #2 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signals transmitted by base stations #1 and #2 in FIG. 19A. FIG. showing an example of the time and frequency arrangement of the wireless power transmission signals transmitted by base stations #1 and #2 in FIG. 19A. FIGS. 3A, 3B, 3C, 3D, 3E showing base stations #1 and #2 and power transmission.and / or a diagram showing an example of the relationship between base station #1 and terminal #1 that charges the battery by receiving a signal for power transmission transmitted by a device for communication. Diagram showing an example of base station #1 setting a chargeable area at a position different from that of FIG. 21A. Diagram showing an example of how the charging area of ​​base station #1 is set on a time axis. Diagram showing an example of how the charging area of ​​base station #2 is set on a time axis ... the relationship between base station #1 and base station #2 in FIGS. 3A, 3B, 3C, 3D, and 3E and terminal #1 that charges the battery by receiving a signal for power transmission transmitted by a device for power transmission and / or communication. Diagram showing an example of how the base station #1 sets a chargeable area at a position different from that of FIG. 21D. Diagram showing an example of how the charging area of ​​base station #1 is set on a time axis. Diagram showing an example of how the charging area of ​​base station #2 is set on a time axis. Diagram for explaining an example of the operation of base station #1 when base station #1 transmits a wireless power transmission signal to change the position of the chargeable area over time as in FIG. 21C1. Diagram showing an example of the operation of base station #1 when base station #1 transmits a wireless power transmission signal to change the position setting of the chargeable area over time as in FIG. 21F1. 25A and 25B are diagrams for explaining an operation example of 1; FIG. 26A shows an example of the configuration on the time axis of a transmission signal transmitted by terminal #1; FIG. 26B shows an example of an exchange when terminal #1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits information on a set mode regarding a transmission method for a wireless power transmission signal; FIG. 26C shows an example of the configuration on the time axis of a transmission signal transmitted by a base station for communication to a terminal; FIG. 26D shows an example of the configuration on the time axis of a transmission signal transmitted by a base station for communication to a terminal, which is different from FIG. 25; FIG. 26E shows an example of an exchange between a base station and terminal #1 in FIGS. 3A, 3B, 3C, 3D, and 3E, which is different from FIG. 24; 15B shows an example of the time axis configuration of a transmission signal transmitted by terminal #1. FIG. 3A shows an example of the exchange when terminal #1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits mode setting information regarding the transmission method of a wireless power transmission signal. FIG. 3B shows an example of the configuration of base stations #1 and #2 different from FIG. 15B. FIG. 3C shows an example of the time axis configuration of a transmission signal transmitted by a communication base station to a terminal. In fixed mode, when base station #1 and base station #2 generate asynchronous wireless power transmission signals (NCJT), base station #1 transmits wireless power transmission reference signal #1,3A, 3B, 3C, 3D, and 3E show examples of when base station #1 and base station #2 transmit wireless power transmission reference signal #2; 3B shows an example of the configuration of the signal transmitted by base station #1 of the modulated signal transmitted by the terminal to the base station for communication; 3C shows an example of the time axis when the wireless power transmission signal transmitted by the base station is a multicarrier transmission method such as OFDM with a guard interval, or a single carrier transmission method with a guard interval; 3D shows examples of when base station #1 and base station #2 transmit wireless power transmission signals in FIGS. 3A, 3B, 3C, 3D, and 3E show how the signals are received by the terminal; 3D shows an example of a wireless power transmission system according to the prior art;

[0015] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0016] First Embodiment In the first embodiment, a system and device for wireless power transmission will be described.

[0017] 1A shows an example of the configuration of a "device for power transmission and communication" in this embodiment, such as a base station, a TRP (Transmission / Reception point (TX / RX) point), an access point, etc. The "device for power transmission and communication" may be an example of a wireless device, a wireless power transmission device, a power transmission device, a communication device, etc.

[0018] The control unit 199A outputs a control signal 198A including control information for communication and control information for power transmission.

[0019] 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.

[0020] Then, 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Fig. 1B shows a different configuration example from Fig. 1A of the "power transmission and communication device" in this embodiment, such as a base station, a TRP, an access point, etc. In Fig. 1B, the same numbers are used for components that operate in the same way as in Fig. 1A, and some explanations will be omitted.

[0026] 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.

[0027] The configuration and operation of the power transmitting antenna i 103A_i will be described in detail later.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] A more specific explanation will be given. Signal 153C_2 is represented as tp2(t), where t is time. If the multiplication coefficient is w1, then signal 155C_2 after coefficient multiplication can be represented as tp2(t)×w2. Note that tp2(t) can be represented by a complex number, and therefore may be a real number. Furthermore, w2 can be represented by a complex number, and therefore may be a real number.

[0035] 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.

[0036] 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 w1, 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. Furthermore, w3 can be expressed as a complex number, and therefore may be a real number.

[0037] 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.

[0038] A more specific explanation will be given. Signal 153C_4 is represented as tp4(t). Here, t is time. If the multiplication coefficient is w1, then signal 155C_4 after coefficient multiplication can be represented as tp4(t)×w4. Note that tp4(t) can be represented as a complex number, and therefore may be a real number. Furthermore, w4 can be represented as a complex number, and therefore may be a real number.

[0039] 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.

[0040] 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.

[0041] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The value of w1 is set based on the control signal 150 C. The value of w1 may be switchable.

[0046] 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.

[0047] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The transmission directivity control unit 181D may select an antenna to be used in accordance with the calculation for transmission directivity control.

[0053] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] The transmission directivity control unit 181D may select an antenna to be used in accordance with the calculation for transmission directivity control.

[0059] 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.

[0060] 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.

[0061] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0062] FIG. 1E shows an example of the configuration of a "power transmission and communication device" in this embodiment, such as a base station, a TRP, or an access point.

[0063] The control unit 199E outputs a control signal 198E including control information for communication and control information for power transmission.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0073] Fig. 1F shows a different configuration example from Fig. 1E of the "power transmission and communication device" in this embodiment, such as a base station, a TRP, an access point, etc. In Fig. 1F, the same numbers are used for components that operate in the same way as in Fig. 1E, and some of the explanations will be omitted.

[0074] 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.

[0075] 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.

[0076] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0077] FIG. 1G shows an example of the configuration of a "device for power transmission and communication" in this embodiment, such as a base station, a TRP, or an access point.

[0078] The control unit 199G outputs a control signal 198G including control information for communication and control information for power transmission.

[0079] 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.

[0080] 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 143G_i. ... A transmission signal 142G_M for power transmission is output as radio waves from a power transmission and communication antenna M 143G_M.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0087] Fig. 1H shows a configuration example of the "power transmission and communication device" in this embodiment, which is different from Fig. 1G, such as a base station, a TRP, an access point, etc. In Fig. 1H, the same numbers are used for components that operate in the same way as in Fig. 1G, and some explanations will be omitted.

[0088] 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.

[0089] 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.

[0090] 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 sent by a "device for power transmission and communication" such as a base station, TRP, or access point can achieve the effect of being able to charge with high efficiency.

[0091] Note that Figures 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H are examples of the configuration of "devices for power transmission and communication" such as base stations, TRPs, and access points, and the method of configuring the devices is not limited to these examples.

[0092] The devices of FIGS. 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H may be configured as a single device.

[0093] 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H may be separate devices. Therefore, the devices in FIGS. 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H may be configured by multiple devices.

[0094] The "power transmission-related devices" and "communication-related devices" in Figures 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H may not be equipped with parts for controlling transmission directivity and receiving directivity.

[0095] 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, a TRP, 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, a mobile terminal, etc.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0102] 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).

[0103] 2B shows a different configuration example from that of 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, a TRP, 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.

[0104] 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.

[0105] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0106] 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).

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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 first received signal 254C_3 after coefficient multiplication. Note that control signal 250C corresponds to control signal 204B_i in FIG. 2B, for example.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] The value of d1 is set based on the control signal 250D. Note that the value of d1 may be switchable.

[0126] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0127] Figure 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, TRP, or access point, and charges a battery.

[0128] Control unit 299E receives received data 225E (or a signal generated by receiving it) as input, and outputs control signal 298E including communication control information and charging control information.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0136] 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, a TRP, an access point, etc., in this embodiment and charges a battery. In Fig. 2F, the same numbers are used for components that operate in the same way as in Fig. 2E, and some explanations will be omitted.

[0137] 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.

[0138] 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.

[0139] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0140] Figure 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, TRP, or access point, and charges a battery.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0149] 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, a TRP, an access point, etc., 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.

[0150] 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.

[0151] 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.

[0152] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0153] 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.

[0154] The stabilization circuit 281I receives a signal received by an antenna and stabilizes the signal. For example, the stabilization circuit 281I 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 282I, charging a battery 283I. The battery 283I supplies power (voltage, current) to each component.

[0155] 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.

[0156] 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.

[0157] 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 the stabilization circuit 281I).

[0158] 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.

[0159] 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.

[0160] The antenna control signal 234F_i that controls the power reception and reception antenna i of 231E_i in FIG. 2F can be generated using the received data 290 and the signal 291J.

[0161] 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.

[0162] 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.

[0163] 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."

[0164] 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.

[0165] 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."

[0166] 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."

[0167] 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."

[0168] 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.

[0169] 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."

[0170] 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.

[0171] 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.

[0172] By doing so, it becomes possible to control the directivity of the signal when receiving power for charging, which may enable highly efficient charging.

[0173] 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, a TRP, or an access point, and charges a battery, but the configuration method of the device is not limited to this example. Also, the device that charges a battery may be equipped with one or more batteries, or two or more batteries.

[0174] The "power receiving related devices" and "communication related devices" in Figures 2A, 2B, 2E, 2F, 2G, and 2H do not necessarily have to include parts for performing transmission directivity control and reception directivity control.

[0175] The devices in Figures 2A, 2B, 2E, 2F, 2G, and 2H may not include devices related to communication.

[0176] The devices in Figures 2A, 2B, 2E, 2F, 2G, and 2H may communicate with multiple base stations and multiple TRPs. Therefore, the "communication-related devices" in Figures 2A, 2B, 2E, 2F, 2G, and 2H may have the capability to communicate with multiple base stations and multiple TRPs.

[0177] 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."

[0178] It is assumed that a base station #1 of 301_1 is transmitting power wirelessly to a terminal #1 of 302_1, and a base station #2 of 301_2 is transmitting power wirelessly to a terminal #1 of 302_1.

[0179] Also, it is assumed that the base station #1 of 301_1 is communicating with the terminal #1 of 302_1 by radio, for example.

[0180] Base station #1 of 301_1 and base station #2 of 301_2 may be able to communicate, for example, via a network.

[0181] For example, by "base station #1 of 301_1 communicating with terminal #1 of 302_1" and / or "base station #1 of 301_1 transmitting a signal for power transmission (signal for wireless power transmission) to terminal #1 of 302_1", base station #1 of 301_1 will obtain "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1", etc.

[0182] Base station #1 of 301_1 communicates with base station #2 of 301_2, and base station #1 of 301_1 may transmit to base station #2 of 301_2 "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the communication modulation signal to be transmitted, information about the wireless power transmission signal to be transmitted," etc. Furthermore, base station #2 of 301_2 may transmit to base station #1 of 301_1 "information about the wireless power transmission signal to be transmitted," etc.

[0183] As a result, for example, base station #1 of 301_1 and base station #2 of 301_2 control the transmission timing, transmission frequency, signal configuration, etc. of a signal for power transmission (wireless power transmission signal) to be transmitted to terminal #1 of 302_1. Details will be explained later.

[0184] Fig. 3B shows an example of the relationship between a base station and a terminal. Fig. 3B 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 (cell)."

[0185] It is assumed that a base station #1 of 301_1 is transmitting power wirelessly to a terminal #1 of 302_1, and a base station #2 of 301_2 is transmitting power wirelessly to a terminal #1 of 302_1.

[0186] Also, it is assumed that the base station #1 of 301_1 is communicating with the terminal #1 of 302_1, for example, wirelessly, and the base station #2 of 301_2 is communicating with the terminal #1 of 302_1, for example, wirelessly.

[0187] Base station #1 of 301_1 and base station #2 of 301_2 may be able to communicate, for example, via a network.

[0188] For example, by "base station #1 of 301_1 communicating with terminal #1 of 302_1" and / or "base station #1 of 301_1 transmitting a signal for power transmission (signal for wireless power transmission) to terminal #1 of 302_1", base station #1 of 301_1 will obtain "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1", etc.

[0189] Furthermore, by "base station #2 of 301_2 communicating with terminal #1 of 302_1" and / or "base station #2 of 301_2 transmitting a signal for power transmission (signal for wireless power transmission) to terminal #1 of 302_1", base station #2 of 301_2 will obtain "information obtained from terminal #1 of 302_1, information regarding terminal #1 of 302_1", etc.

[0190] Base station #1 of 301_1 communicates with base station #2 of 301_2, and base station #1 of 301_1 may transmit to base station #2 of 301_2 "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the modulation signal for communication to be transmitted, information about the wireless power transmission signal to be transmitted," etc. Also, base station #2 of 301_2 may transmit to base station #1 of 301_1 "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the modulation signal for communication to be transmitted, information about the wireless power transmission signal to be transmitted," etc.

[0191] As a result, for example, base station #1 of 301_1 and base station #2 of 301_2 control the transmission timing, transmission frequency, signal configuration, etc. of a signal for power transmission (wireless power transmission signal) to be transmitted to terminal #1 of 302_1. Details will be explained later.

[0192] Fig. 3C shows an example of the relationship between a base station and a terminal. Fig. 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 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 (cell)," which is different from Figs. 3A and 3B.

[0193] It is assumed that a base station #1 of 301_1 is transmitting power wirelessly to a terminal #1 of 302_1, and a base station #2 of 301_2 is transmitting power wirelessly to a terminal #1 of 302_1.

[0194] It is assumed that a base station #C1 of 391_1 is communicating with a terminal #1 of 302_1 by radio, for example.

[0195] Base station #C1 of 391_1, base station #1 of 301_1, and base station #2 of 301_2 may be able to communicate, for example, via a network.

[0196] For example, by "base station #1 of 301_1 transmitting a signal for power transmission (wireless power transmission signal) to terminal #1 of 302_1," base station #1 of 301_1 will obtain "information about terminal #1 of 302_1," etc.

[0197] Furthermore, by "base station #2 of 301_2 transmitting a signal for power transmission (signal for wireless power transmission) to terminal #1 of 302_1," base station #2 of 301_2 will obtain "information about terminal #1 of 302_1," etc.

[0198] By "base station #C1 of 391_1 communicating with terminal #1 of 302_1", base station #C1 of 391_1 obtains "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1", etc.

[0199] The base station #1 of 301_1, the base station #2 of 301_2, and the base station #C1 of 391_1 perform communication.

[0200] The base station #1 of 301_1 may transmit "information about the terminal #1 of 302_1, information about the wireless power transmission signal to be transmitted," etc. to the base station #2 of 301_2 and the base station #C1 of 391_1.

[0201] Also, the base station #2 of 301_2 may transmit "information about the terminal #1 of 302_1, information about the wireless power transmission signal to be transmitted," etc. to the base station #1 of 301_1 and the base station #C1 of 391_1.

[0202] Base station #C1 of 391_1 may transmit "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the modulated signal for communication to be transmitted" to base station #1 of 301_1 and base station #2 of 301_2.

[0203] As a result, for example, base station #1 of 301_1 and base station #2 of 301_2 control the transmission timing, transmission frequency, signal configuration, etc. of a signal for power transmission (wireless power transmission signal) to be transmitted to terminal #1 of 302_1. Details will be explained later.

[0204] Fig. 3D shows an example of the relationship between a base station and a terminal. Fig. 3D 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," which is different from those shown in Figs. 3A, 3B, and 3C.

[0205] It is assumed that a base station #1 of 301_1 is transmitting power wirelessly to a terminal #1 of 302_1, and a base station #2 of 301_2 is transmitting power wirelessly to a terminal #1 of 302_1.

[0206] It is assumed that the base station #2 of 301_2 is communicating with the terminal #1 of 302_1 by radio, for example.

[0207] It is assumed that a base station #C1 of 391_1 is communicating with a terminal #1 of 302_1 by radio, for example.

[0208] Base station #C1 of 391_1, base station #1 of 301_1, and base station #2 of 301_2 may be able to communicate, for example, via a network.

[0209] For example, by "base station #1 of 301_1 transmitting a signal for power transmission (wireless power transmission signal) to terminal #1 of 302_1," base station #1 of 301_1 will obtain "information about terminal #1 of 302_1," etc.

[0210] Furthermore, by "base station #2 of 301_2 communicating with terminal #1 of 302_1" and / or "base station #2 of 301_2 transmitting a signal for power transmission (signal for wireless power transmission) to terminal #1 of 302_1", base station #2 of 301_2 will obtain "information obtained from terminal #1 of 302_1, information regarding terminal #1 of 302_1", etc.

[0211] By "base station #C1 of 391_1 communicating with terminal #1 of 302_1", base station #C1 of 391_1 obtains "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1", etc.

[0212] The base station #1 of 301_1, the base station #2 of 301_2, and the base station #C1 of 391_1 perform communication.

[0213] The base station #1 of 301_1 may transmit "information about the terminal #1 of 302_1, information about the wireless power transmission signal to be transmitted," etc. to the base station #2 of 301_2 and the base station #C1 of 391_1.

[0214] In addition, base station #2 of 301_2 may transmit information such as "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the communication modulation signal to be transmitted, and information about the wireless power transmission signal to be transmitted" to base station #1 of 301_1 and base station #C1 of 391_1.

[0215] Base station #C1 of 391_1 may transmit "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the modulated signal for communication to be transmitted" to base station #1 of 301_1 and base station #2 of 301_2.

[0216] As a result, for example, base station #1 of 301_1 and base station #2 of 301_2 control the transmission timing, transmission frequency, signal configuration, etc. of a signal for power transmission (wireless power transmission signal) to be transmitted to terminal #1 of 302_1. Details will be explained later.

[0217] Fig. 3E shows an example of the relationship between a base station and a terminal. Fig. 3E shows an example of the relationship between "a base station exemplified as a 'power transmission and communication device' having the configurations shown in Figs. 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H" and "a terminal exemplified as 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," which is different from the examples shown in Figs. 3A, 3B, 3C, and 3D.

[0218] It is assumed that a base station #1 of 301_1 is transmitting power wirelessly to a terminal #1 of 302_1, and a base station #2 of 301_2 is transmitting power wirelessly to a terminal #1 of 302_1.

[0219] It is assumed that a base station #C1 of 391_1 is communicating with a terminal #1 of 302_1 by radio, for example.

[0220] It is assumed that the base station #C2 of 391_2 is communicating with the terminal #1 of 302_1 by wireless, for example.

[0221] The base station #C1 of 391_1, the base station #C2 of 391_2, the base station #1 of 301_1, and the base station #2 of 301_2 may be able to communicate via a network, for example.

[0222] For example, by "base station #1 of 301_1 transmitting a signal for power transmission (wireless power transmission signal) to terminal #1 of 302_1," base station #1 of 301_1 will obtain "information about terminal #1 of 302_1," etc.

[0223] Furthermore, by "base station #2 of 301_2 transmitting a signal for power transmission (signal for wireless power transmission) to terminal #1 of 302_1," base station #2 of 301_2 will obtain "information about terminal #1 of 302_1," etc.

[0224] By "base station #C1 of 391_1 communicating with terminal #1 of 302_1", base station #C1 of 391_1 obtains "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1", etc.

[0225] By "base station #C2 of 391_2 communicating with terminal #1 of 302_2", base station #C2 of 391_2 obtains "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1", etc.

[0226] The base station #1 of 301_1, the base station #2 of 301_2, the base station #C1 of 391_1, and the base station #C2 of 391_2 perform communication.

[0227] The base station #1 of 301_1 may transmit "information about the terminal #1 of 302_1, information about the wireless power transmission signal to be transmitted," etc. to the base station #2 of 301_2, the base station #C1 of 391_1, and the base station #C2 of 391_2.

[0228] In addition, base station #2 of 301_2 may transmit "information about terminal #1 of 302_1, information about the wireless power transmission signal to be transmitted," etc. to base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2.

[0229] Base station #C1 of 391_1 may transmit "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the modulated signal for communication to be transmitted," etc. to base station #1 of 301_1, base station #2 of 301_2, and base station #C2 of 391_2.

[0230] Base station #C2 of 391_2 may transmit "information obtained from terminal #1 of 302_1, information about terminal #1 of 302_1, information about the modulated signal for communication to be transmitted," etc. to base station #1 of 301_1, base station #2 of 301_2, and base station #C1 of 391_1.

[0231] As a result, for example, base station #1 of 301_1 and base station #2 of 301_2 control the transmission timing, transmission frequency, signal configuration, etc. of a signal for power transmission (wireless power transmission signal) to be transmitted to terminal #1 of 302_1. Details will be explained later.

[0232] 3A, 3B, 3C, 3D, and 3E, a base station is described as a base station, but the base station may also be called a "repeater, access point, TRP, gNB (g Node B), eNB (e Node B)," etc. The name of the base station is not limited to these.

[0233] An example of the operation of the base station and the terminal in FIGS. 3A, 3B, 3C, 3D, and 3E will be described.

[0234] 3A and 3B, base station #1 301_1 transmits a communication modulated signal (a modulated signal for transmitting data to a communication partner) and a wireless power transmission signal (a signal for transmitting power to a communication partner). Fig. 4A1 shows an example of the time and frequency arrangement of the communication modulated signal and the wireless power transmission signal transmitted by base station #1 301_1. In Fig. 4A1, the horizontal axis represents time and the vertical axis represents frequency.

[0235] 4A1, both the modulated signal for communication 401A and the signal for wireless power transmission 402A exist at frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0236] Fig. 4A2 shows an example of the time and frequency arrangement of the communication modulated signal and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same manner as in Fig. 4A1 are assigned the same numbers. In Fig. 4A2, the horizontal axis represents time and the vertical axis represents frequency.

[0237] 4A2, the modulated signal for communication 401A exists within the frequency AA1, and the signal for wireless power transmission 402A exists at the frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0238] Fig. 4A3 shows an example of the time and frequency arrangement of the communication modulated signal and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same manner as in Fig. 4A1 are assigned the same numbers. In Fig. 4A3, the horizontal axis represents time and the vertical axis represents frequency.

[0239] 4A3, the modulated signal for communication 401A exists at frequency AA1, and the signal for wireless power transmission 402A exists within frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0240] 4A1, 4A2, and 4A3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the method of time division multiplexing (TDM) of the "modulated signal for communication 401A and the signal for wireless power transmission 402A" is not limited to the examples shown in FIGS. 4A1, 4A2, and 4A3.

[0241] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0242] 4B1 shows an example of the time and frequency arrangement of modulated communication signals and wireless power transmission signals transmitted by base station #1 of 301_1. In FIG. 4B1, the horizontal axis represents time and the vertical axis represents frequency.

[0243] 4B1, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0244] 4B2 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same manner as in FIG. 4B1 are assigned the same numbers. In FIG. 4B2, the horizontal axis represents time and the vertical axis represents frequency.

[0245] As shown in Fig. 4B2, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists within time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM). Although not shown in the figure, the modulated signal for communication 401B may exist within time B1, and the signal for wireless power transmission 402B may exist at time B1. Furthermore, any configuration is possible as long as the "modulated signal for communication 401B and the signal for wireless power transmission 402B" exist at the same time.

[0246] 4B3 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same manner as in FIG. 4B1 are assigned the same numbers. In FIG. 4B3, the horizontal axis represents time and the vertical axis represents frequency.

[0247] 4B3, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B2. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0248] 4B1, 4B2, and 4B3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the frequency division multiplexing (FDM) method of the "modulated signal for communication 401B and the signal for wireless power transmission 402B" is not limited to the examples shown in FIGS. 4B1, 4B2, and 4B3.

[0249] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0250] 4C1 shows an example of the time and frequency arrangement of modulated communication signals and wireless power transmission signals transmitted by base station #1 of 301_1. In FIG. 4C1, the horizontal axis represents time and the vertical axis represents frequency.

[0251] 4C1, the modulated signal for communication 401C exists at frequency CC1, and the signal for wireless power transmission 402C exists at frequency CC1. The modulated signal for communication 401C exists at time C1, and the signal for wireless power transmission 402C exists at time C1. Therefore, the modulated signal for communication 401C and the signal for wireless power transmission 402C are spatial division multiplexed (SDM).

[0252] 4C2 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same manner as in FIG. 4C1 are assigned the same numbers. In FIG. 4C2, the horizontal axis represents time and the vertical axis represents frequency.

[0253] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C2, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0254] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C2, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0255] 4C3 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same manner as in FIG. 4C1 are assigned the same numbers. In FIG. 4C3, the horizontal axis represents time and the vertical axis represents frequency.

[0256] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C3, the signal for wireless power transmission 402C exists at frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0257] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C3, the communication modulation signal 401C is set to exist at frequency CC1 and time C1. In this case, the communication modulation signal 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0258] 4C4 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same manner as in FIG. 4C1 are assigned the same numbers. In FIG. 4C4, the horizontal axis represents time and the vertical axis represents frequency.

[0259] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C4, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0260] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C4, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. In this case, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0261] 4C1, 4C2, 4C3, and 4C4, it is possible to suppress interference between the modulation signal for communication and the signal for wireless power transmission. Note that the method of space division multiplexing (SDM) of the "modulation signal for communication 401C and the signal for wireless power transmission 402C" is not limited to the examples in FIGS. 4C1, 4C2, 4C3, and 4C4. For example, in FIGS. 4C2, 4C3, and 4C4, the "modulation signal for communication 401C and the signal for wireless power transmission 402C" may exist at a time other than C1.

[0262] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0263] Base station #2 301_2 in Figures 3B and 3D transmits a communication modulated signal (a modulated signal for transmitting data to a communication partner) and a wireless power transmission signal (a signal for transmitting power to a communication partner). Figure 4A1 shows an example of the time and frequency arrangement of the communication modulated signal and the wireless power transmission signal transmitted by base station #2 301_2. In Figure 4A1, the horizontal axis represents time and the vertical axis represents frequency.

[0264] 4A1, both the modulated signal for communication 401A and the signal for wireless power transmission 402A exist at frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0265] Fig. 4A2 shows an example of the time and frequency arrangement of the communication modulated signal and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same manner as in Fig. 4A1 are assigned the same numbers. In Fig. 4A2, the horizontal axis represents time and the vertical axis represents frequency.

[0266] 4A2, the modulated signal for communication 401A exists within the frequency AA1, and the signal for wireless power transmission 402A exists at the frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0267] Fig. 4A3 shows an example of the time and frequency arrangement of the communication modulated signal and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same manner as in Fig. 4A1 are assigned the same numbers. In Fig. 4A3, the horizontal axis represents time and the vertical axis represents frequency.

[0268] 4A3, the modulated signal for communication 401A exists at frequency AA1, and the signal for wireless power transmission 402A exists within frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0269] 4A1, 4A2, and 4A3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the method of time division multiplexing (TDM) of the "modulated signal for communication 401A and the signal for wireless power transmission 402A" is not limited to the examples shown in FIGS. 4A1, 4A2, and 4A3.

[0270] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0271] 4B1 shows an example of the time and frequency arrangement of modulated communication signals and wireless power transmission signals transmitted by base station #2 of 301_2. In FIG. 4B1, the horizontal axis represents time and the vertical axis represents frequency.

[0272] 4B1, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0273] 4B2 shows an example of the time and frequency arrangement of the communication modulated signal and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same manner as in FIG. 4B1 are assigned the same numbers. In FIG. 4B2, the horizontal axis represents time and the vertical axis represents frequency.

[0274] As shown in Fig. 4B2, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists within time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM). Although not shown in the figure, the modulated signal for communication 401B may exist within time B1, and the signal for wireless power transmission 402B may exist at time B1. Furthermore, any configuration is possible as long as the "modulated signal for communication 401B and the signal for wireless power transmission 402B" exist at the same time.

[0275] 4B3 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same manner as in FIG. 4B1 are assigned the same numbers. In FIG. 4B3, the horizontal axis represents time and the vertical axis represents frequency.

[0276] 4B3, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B2. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0277] 4B1, 4B2, and 4B3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the frequency division multiplexing (FDM) method of the "modulated signal for communication 401B and the signal for wireless power transmission 402B" is not limited to the examples shown in FIGS. 4B1, 4B2, and 4B3.

[0278] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0279] 4C1 shows an example of the time and frequency arrangement of modulated communication signals and wireless power transmission signals transmitted by base station #2 of 301_2. In FIG. 4C1, the horizontal axis represents time and the vertical axis represents frequency.

[0280] 4C1, the modulated signal for communication 401C exists at frequency CC1, and the signal for wireless power transmission 402C exists at frequency CC1. The modulated signal for communication 401C exists at time C1, and the signal for wireless power transmission 402C exists at time C1. Therefore, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0281] 4C2 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same manner as in FIG. 4C1 are assigned the same numbers. In FIG. 4C2, the horizontal axis represents time and the vertical axis represents frequency.

[0282] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C2, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0283] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C2, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0284] 4C3 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same manner as in FIG. 4C1 are assigned the same numbers. In FIG. 4C3, the horizontal axis represents time and the vertical axis represents frequency.

[0285] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C3, the signal for wireless power transmission 402C exists at frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0286] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C3, the communication modulation signal 401C is set to exist at frequency CC1 and time C1. In this case, the communication modulation signal 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0287] 4C4 shows an example of the time and frequency arrangement of the communication modulation signal and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same manner as in FIG. 4C1 are assigned the same numbers. In FIG. 4C4, the horizontal axis represents time and the vertical axis represents frequency.

[0288] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C4, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0289] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C4, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. In this case, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0290] 4C1, 4C2, 4C3, and 4C4, it is possible to suppress interference between the modulation signal for communication and the signal for wireless power transmission. Note that the method of space division multiplexing (SDM) of the "modulation signal for communication 401C and the signal for wireless power transmission 402C" is not limited to the examples in FIGS. 4C1, 4C2, 4C3, and 4C4. For example, in FIGS. 4C2, 4C3, and 4C4, the "modulation signal for communication 401C and the signal for wireless power transmission 402C" may exist at a time other than C1.

[0291] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0292] The wireless power transmission signals transmitted from the base station #1 301_1 and the base station #2 301_2 to the terminal #1 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E will be described.

[0293] 5A1 shows an example of the time and frequency arrangement of a wireless power transmission signal 591A transmitted by base station #1 301_1 and a wireless power transmission signal 592A transmitted by base station #2 301_2. In FIG. 5A1, the horizontal axis represents time and the vertical axis represents frequency.

[0294] 5A1, a wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists at a frequency AA51, and a wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists at a frequency AA51. The wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists at a time A51, and a wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists at a time A51.

[0295] The terminal #1 of 302_1 receives the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2, and performs charging.

[0296] The wireless power transmission signal 591A transmitted by base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by base station #2 of 301_2 are single-carrier signals, multi-carrier signals, other signals (e.g., CW (Continuous Wave)), etc.

[0297] 5A2 shows an example of the time and frequency arrangement of a wireless power transmission signal 591A transmitted by base station #1 301_1 and a wireless power transmission signal 592A transmitted by base station #2 301_2. In FIG. 5A2, the horizontal axis represents time and the vertical axis represents frequency.

[0298] As shown in Fig. 5A1, it is assumed that a wireless power transmission signal 591A transmitted by base station #1 of 301_1 is present at frequency AA51 and time A51. At this time, as shown in Fig. 5A2, it is assumed that a wireless power transmission signal 592A transmitted by base station #2 of 301_2 is present at frequency AA51 and time A51.

[0299] Alternatively, as shown in Fig. 5A1, it is assumed that a wireless power transmission signal 592A transmitted by base station #2 of 301_2 is present at frequency AA51 and time A51, and at this time, as shown in Fig. 5A2, it is assumed that a wireless power transmission signal 591A transmitted by base station #1 of 301_1 is present at frequency AA51 and time A51.

[0300] The terminal #1 of 302_1 receives the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2, and performs charging.

[0301] The wireless power transmission signal 591A transmitted by base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by base station #2 of 301_2 are single-carrier signals, multi-carrier signals, other signals (e.g., CW), etc.

[0302] 5A3 shows an example of the time and frequency arrangement of a wireless power transmission signal 591A transmitted by base station #1 301_1 and a wireless power transmission signal 592A transmitted by base station #2 301_2. In FIG. 5A3, the horizontal axis represents time and the vertical axis represents frequency.

[0303] As shown in Fig. 5A1, it is assumed that a wireless power transmission signal 591A transmitted by base station #1 of 301_1 exists at frequency AA51 and time A51. At this time, as shown in Fig. 5A3, it is assumed that a wireless power transmission signal 592A transmitted by base station #2 of 301_2 exists at frequency AA51 and time A51.

[0304] Alternatively, as shown in Fig. 5A1, it is assumed that a wireless power transmission signal 592A transmitted by base station #2 of 301_2 is present at frequency AA51 and time A51. At this time, as shown in Fig. 5A3, it is assumed that a wireless power transmission signal 591A transmitted by base station #1 of 301_1 is present at frequency AA51 and time A51.

[0305] The terminal #1 of 302_1 receives the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2, and performs charging.

[0306] The wireless power transmission signal 591A transmitted by base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by base station #2 of 301_2 are single-carrier signals, multi-carrier signals, other signals (e.g., CW), etc.

[0307] 5A4 shows an example of the time and frequency arrangement of a wireless power transmission signal 591A transmitted by base station #1 301_1 and a wireless power transmission signal 592A transmitted by base station #2 301_2. In FIG. 5A4, the horizontal axis represents time and the vertical axis represents frequency.

[0308] As shown in Fig. 5A1, it is assumed that a wireless power transmission signal 591A transmitted by base station #1 of 301_1 exists at frequency AA51 and time A51. At this time, as shown in Fig. 5A4, it is assumed that a wireless power transmission signal 592A transmitted by base station #2 of 301_2 exists within frequency AA51 and time A51.

[0309] Alternatively, as shown in Fig. 5A1, it is assumed that a wireless power transmission signal 592A transmitted by base station #2 of 301_2 is present at frequency AA51 and time A51. At this time, as shown in Fig. 5A4, it is assumed that a wireless power transmission signal 591A transmitted by base station #1 of 301_1 is present within frequency AA51 and time A51.

[0310] The terminal #1 of 302_1 receives the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2, and performs charging.

[0311] The wireless power transmission signal 591A transmitted by base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by base station #2 of 301_2 are single-carrier signals, multi-carrier signals, other signals (e.g., CW), etc.

[0312] Figure 5B1 shows an example of the state of (sub)carriers when the "wireless power transmission signal 591A transmitted by base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by base station #2 of 301_2" in Figures 5A1, 5A2, 5A3, and 5A4 use a multi-carrier system.

[0313] The wireless power transmission signal 591A transmitted by base station #1 of 301_1 has one or more (sub)carriers, and the wireless power transmission signal 592A transmitted by base station #2 of 301_2 has one or more (sub)carriers.

[0314] Furthermore, it is assumed that "at least one (sub)carrier of the wireless power transmission signal 591A transmitted by base station #1 of 301_1" is in the state of Figure 5B1, and "at least one (sub)carrier of the wireless power transmission signal 592A transmitted by base station #2 of 301_2" is in the state of Figure 5B1.

[0315] 5B1 shows an example of the time and frequency arrangement of a (sub)carrier 593B of a wireless power transmission signal transmitted by base station #1 of 301_1 and a (sub)carrier 594B of a wireless power transmission signal transmitted by base station #2 of 301_2. In FIG. 5B1, the horizontal axis represents time and the vertical axis represents frequency.

[0316] As shown in FIG. 5B1, (sub)carrier 593B of the wireless power transmission signal transmitted by base station #1 of 301_1 is located on (sub)carrier BB51, time B51, and (sub)carrier 594B of the wireless power transmission signal transmitted by base station #2 of 301_2 is located on (sub)carrier BB51, time B51.

[0317] Terminal #1 of 302_1 receives a wireless power transmission signal transmitted by base station #1 of 301_1 including (sub)carrier BB51 and a wireless power transmission signal transmitted by base station #2 of 301_2 including (sub)carrier BB51, and performs charging.

[0318] In addition, the wireless power transmission signal transmitted by base station #1 of 301_1 may have a (sub)carrier other than (sub)carrier BB51, and the wireless power transmission signal transmitted by base station #2 of 301_2 may have a (sub)carrier other than (sub)carrier BB51.

[0319] Figure 5B2 shows an example of the state of (sub)carriers when the "wireless power transmission signal 591A transmitted by base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by base station #2 of 301_2" in Figures 5A1, 5A2, 5A3, and 5A4 use a multi-carrier system.

[0320] The wireless power transmission signal 591A transmitted by base station #1 of 301_1 has one or more (sub)carriers, and the wireless power transmission signal 592A transmitted by base station #2 of 301_2 has one or more (sub)carriers.

[0321] 5B2 shows an example of the time and frequency arrangement of a (sub)carrier 593B of a wireless power transmission signal transmitted by base station #1 of 301_1 and a (sub)carrier 594B of a wireless power transmission signal transmitted by base station #2 of 301_2. In FIG. 5B2, the horizontal axis represents time and the vertical axis represents frequency.

[0322] Furthermore, it is assumed that "at least one (sub)carrier of the wireless power transmission signal 591A transmitted by base station #1 of 301_1" is in the state shown in FIG. 5B1, and "at least one (sub)carrier of the wireless power transmission signal 592A transmitted by base station #2 of 301_2" is in the state shown in FIG. 5B2.

[0323] As shown in Fig. 5B1, it is assumed that a (sub)carrier 593B of a wireless power transmission signal transmitted by base station #1 of 301_1 is present on (sub)carrier BB51, time B51. As shown in Fig. 5B2, it is assumed that a (sub)carrier 594B of a wireless power transmission signal transmitted by base station #2 of 301_2 is present on (sub)carrier BB51, time B51.

[0324] Terminal #1 of 302_1 receives a wireless power transmission signal transmitted by base station #1 of 301_1 including (sub)carrier BB51 and a wireless power transmission signal transmitted by base station #2 of 301_2 including (sub)carrier BB51, and performs charging.

[0325] As another example, assume that "at least one (sub)carrier of wireless power transmission signal 591A transmitted by base station #1 of 301_1" is in the state of FIG. 5B2, and "at least one (sub)carrier of wireless power transmission signal 592A transmitted by base station #2 of 301_2" is in the state of FIG. 5B1.

[0326] As shown in Fig. 5B2, it is assumed that a (sub)carrier 593B of a wireless power transmission signal transmitted by base station #1 of 301_1 is present on (sub)carrier BB51, time B51. As shown in Fig. 5B1, it is assumed that a (sub)carrier 594B of a wireless power transmission signal transmitted by base station #2 of 301_2 is present on (sub)carrier BB51, time B51.

[0327] Terminal #1 of 302_1 receives a wireless power transmission signal transmitted by base station #1 of 301_1 including (sub)carrier BB51 and a wireless power transmission signal transmitted by base station #2 of 301_2 including (sub)carrier BB51, and performs charging.

[0328] In addition, the wireless power transmission signal transmitted by base station #1 of 301_1 may have a (sub)carrier other than (sub)carrier BB51, and the wireless power transmission signal transmitted by base station #2 of 301_2 may have a (sub)carrier other than (sub)carrier BB51.

[0329] Figure 5B3 shows an example of the state of (sub)carriers when the "wireless power transmission signal 591A transmitted by base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by base station #2 of 301_2" in Figures 5A1, 5A2, 5A3, and 5A4 use a multi-carrier system.

[0330] The wireless power transmission signal 591A transmitted by base station #1 of 301_1 has one or more (sub)carriers, and the wireless power transmission signal 592A transmitted by base station #2 of 301_2 has one or more (sub)carriers.

[0331] 5B3 shows an example of the time and frequency arrangement of a (sub)carrier 593B of a wireless power transmission signal transmitted by base station #1 of 301_1 and a (sub)carrier 594B of a wireless power transmission signal transmitted by base station #2 of 301_2. In FIG. 5B3, the horizontal axis represents time and the vertical axis represents frequency.

[0332] Furthermore, it is assumed that "at least one (sub)carrier of the wireless power transmission signal 591A transmitted by base station #1 of 301_1" is in the state shown in FIG. 5B1, and "at least one (sub)carrier of the wireless power transmission signal 592A transmitted by base station #2 of 301_2" is in the state shown in FIG. 5B3.

[0333] As shown in Fig. 5B1, it is assumed that a (sub)carrier 593B of a wireless power transmission signal transmitted by base station #1 of 301_1 is located on (sub)carrier BB51, time B51. As shown in Fig. 5B3, it is assumed that a (sub)carrier 594B of a wireless power transmission signal transmitted by base station #2 of 301_2 is located on (sub)carrier BB51, time B51.

[0334] Terminal #1 of 302_1 receives a wireless power transmission signal transmitted by base station #1 of 301_1 including (sub)carrier BB51 and a wireless power transmission signal transmitted by base station #2 of 301_2 including (sub)carrier BB51, and performs charging.

[0335] As another example, assume that "at least one (sub)carrier of wireless power transmission signal 591A transmitted by base station #1 of 301_1" is in the state of FIG. 5B3, and "at least one (sub)carrier of wireless power transmission signal 592A transmitted by base station #2 of 301_2" is in the state of FIG. 5B1.

[0336] As shown in Fig. 5B3, it is assumed that a (sub)carrier 593B of a wireless power transmission signal transmitted by base station #1 of 301_1 is present on (sub)carrier BB51, time B51. As shown in Fig. 5B1, it is assumed that a (sub)carrier 594B of a wireless power transmission signal transmitted by base station #2 of 301_2 is present on (sub)carrier BB51, time B51.

[0337] Terminal #1 of 302_1 receives a wireless power transmission signal transmitted by base station #1 of 301_1 including (sub)carrier BB51 and a wireless power transmission signal transmitted by base station #2 of 301_2 including (sub)carrier BB51, and performs charging.

[0338] In addition, the wireless power transmission signal transmitted by base station #1 of 301_1 may have a (sub)carrier other than (sub)carrier BB51, and the wireless power transmission signal transmitted by base station #2 of 301_2 may have a (sub)carrier other than (sub)carrier BB51.

[0339] An operation different from the above of the base station #1 of 301_1, the base station #2 of 301_2, the base station #C1 of 391_1, and the base station #C2 of 391_2 in FIGS. 3A, 3B, 3C, 3D, and 3E will be described.

[0340] In Figures 3A, 3B, 3C, 3D, and 3E, base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2 transmit modulated signals for communication, and base station #2 of 301_2 transmits signals for wireless power transmission.

[0341] 4A1 shows an example of the time and frequency arrangement of modulated communication signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and signals for wireless power transmission transmitted by base station #2 of 301_2. In FIG. 4A1, the horizontal axis represents time and the vertical axis represents frequency.

[0342] 4A1, both the modulated signal for communication 401A and the signal for wireless power transmission 402A exist at frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0343] 4A2 shows an example of the time and frequency arrangement of communication modulated signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and wireless power transmission signals transmitted by base station #2 of 301_2. Components that operate in the same way as in FIG. 4A1 are assigned the same numbers. In FIG. 4A2, the horizontal axis represents time and the vertical axis represents frequency.

[0344] 4A2, the modulated signal for communication 401A exists within the frequency AA1, and the signal for wireless power transmission 402A exists at the frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0345] 4A3 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same way as in FIG. 4A1 are assigned the same numbers. In FIG. 4A3, the horizontal axis represents time and the vertical axis represents frequency.

[0346] 4A3, the modulated signal for communication 401A exists at frequency AA1, and the signal for wireless power transmission 402A exists within frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0347] 4A1, 4A2, and 4A3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the method of time division multiplexing (TDM) of the "modulated signal for communication 401A and the signal for wireless power transmission 402A" is not limited to the examples shown in FIGS. 4A1, 4A2, and 4A3.

[0348] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0349] 4B1 shows an example of the time and frequency arrangement of modulated communication signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and signals for wireless power transmission transmitted by base station #2 of 301_2. In FIG. 4B1, the horizontal axis represents time and the vertical axis represents frequency.

[0350] 4B1, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0351] 4B2 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same way as in FIG. 4B1 are assigned the same numbers. In FIG. 4B2, the horizontal axis represents time and the vertical axis represents frequency.

[0352] As shown in Fig. 4B2, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists within time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM). Although not shown in the figure, the modulated signal for communication 401B may exist within time B1, and the signal for wireless power transmission 402B may exist at time B1. Furthermore, any configuration is possible as long as the "modulated signal for communication 401B and the signal for wireless power transmission 402B" exist at the same time.

[0353] 4B3 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same way as in FIG. 4B1 are assigned the same numbers. In FIG. 4B3, the horizontal axis represents time, and the vertical axis represents frequency.

[0354] 4B3, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B2. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0355] 4B1, 4B2, and 4B3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the frequency division multiplexing (FDM) method of the "modulated signal for communication 401B and the signal for wireless power transmission 402B" is not limited to the examples shown in FIGS. 4B1, 4B2, and 4B3.

[0356] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0357] 4C1 shows an example of the time and frequency arrangement of modulated communication signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and signals for wireless power transmission transmitted by base station #2 of 301_2. In FIG. 4C1, the horizontal axis represents time and the vertical axis represents frequency.

[0358] 4C1, the modulated signal for communication 401C exists at frequency CC1, and the signal for wireless power transmission 402C exists at frequency CC1. The modulated signal for communication 401C exists at time C1, and the signal for wireless power transmission 402C exists at time C1. Therefore, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0359] 4C2 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same way as in FIG. 4C1 are assigned the same numbers. In FIG. 4C2, the horizontal axis represents time and the vertical axis represents frequency.

[0360] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C2, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0361] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C2, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0362] 4C3 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #2 of 301_2. Components that operate in the same way as in FIG. 4C1 are assigned the same numbers. In FIG. 4C3, the horizontal axis represents time and the vertical axis represents frequency.

[0363] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C3, the signal for wireless power transmission 402C exists at frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0364] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C3, the communication modulation signal 401C is set to exist at frequency CC1 and time C1. In this case, the communication modulation signal 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0365] 4C4 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #1 of 301_1, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signals transmitted by base station #2 of 301_2. Components that operate in the same way as in FIG. 4C1 are assigned the same numbers. In FIG. 4C4, the horizontal axis represents time and the vertical axis represents frequency.

[0366] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C4, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0367] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C4, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. In this case, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0368] 4C1, 4C2, 4C3, and 4C4, it is possible to suppress interference between the modulation signal for communication and the signal for wireless power transmission. Note that the method of space division multiplexing (SDM) of the "modulation signal for communication 401C and the signal for wireless power transmission 402C" is not limited to the examples in FIGS. 4C1, 4C2, 4C3, and 4C4. For example, in FIGS. 4C2, 4C3, and 4C4, the "modulation signal for communication 401C and the signal for wireless power transmission 402C" may exist at a time other than C1.

[0369] This can improve frequency utilization efficiency. Since the base station that transmits the modulated signal for communication and the base station that transmits the wireless power transmission signal are different, the directions from which the modulated signal for communication and the wireless power transmission signal arrive at the terminal are different, which can reduce interference.

[0370] In Figures 3B, 3C, 3D, and 3E, base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2 transmit modulated signals for communication, and base station #1 of 301_1 transmits signals for wireless power transmission.

[0371] 4A1 shows an example of the time and frequency arrangement of modulated communication signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and a wireless power transmission signal transmitted by base station #1 of 301_1. In FIG. 4A1, the horizontal axis represents time and the vertical axis represents frequency.

[0372] 4A1, both the modulated signal for communication 401A and the signal for wireless power transmission 402A exist at frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0373] 4A2 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same way as in FIG. 4A1 are assigned the same numbers. In FIG. 4A2, the horizontal axis represents time and the vertical axis represents frequency.

[0374] 4A2, the modulated signal for communication 401A exists within the frequency AA1, and the signal for wireless power transmission 402A exists at the frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0375] 4A3 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same way as in FIG. 4A1 are assigned the same numbers. In FIG. 4A3, the horizontal axis represents time and the vertical axis represents frequency.

[0376] 4A3, the modulated signal for communication 401A exists at frequency AA1, and the signal for wireless power transmission 402A exists within frequency AA1. The modulated signal for communication 401A exists at time A1, and the signal for wireless power transmission 402A exists at time A2. Therefore, the modulated signal for communication 401A and the signal for wireless power transmission 402A are time division multiplexed (TDM).

[0377] 4A1, 4A2, and 4A3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the method of time division multiplexing (TDM) of the "modulated signal for communication 401A and the signal for wireless power transmission 402A" is not limited to the examples shown in FIGS. 4A1, 4A2, and 4A3.

[0378] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0379] 4B1 shows an example of the time and frequency arrangement of modulated communication signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and a wireless power transmission signal transmitted by base station #1 of 301_1. In FIG. 4B1, the horizontal axis represents time and the vertical axis represents frequency.

[0380] 4B1, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0381] 4B2 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same way as in FIG. 4B1 are assigned the same numbers. In FIG. 4B2, the horizontal axis represents time and the vertical axis represents frequency.

[0382] As shown in Fig. 4B2, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists within time B1. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM). Although not shown in the figure, the modulated signal for communication 401B may exist within time B1, and the signal for wireless power transmission 402B may exist at time B1. Furthermore, any configuration is possible as long as the "modulated signal for communication 401B and the signal for wireless power transmission 402B" exist at the same time.

[0383] 4B3 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same way as in FIG. 4B1 are assigned the same numbers. In FIG. 4B3, the horizontal axis represents time and the vertical axis represents frequency.

[0384] 4B3, the modulated signal for communication 401B exists at frequency BB1, and the signal for wireless power transmission 402B exists at frequency BB2. The modulated signal for communication 401B exists at time B1, and the signal for wireless power transmission 402B exists at time B2. Therefore, the modulated signal for communication 401B and the signal for wireless power transmission 402B are frequency division multiplexed (FDM).

[0385] 4B1, 4B2, and 4B3, it is possible to suppress interference between the modulated signal for communication and the signal for wireless power transmission. Note that the frequency division multiplexing (FDM) method of the "modulated signal for communication 401B and the signal for wireless power transmission 402B" is not limited to the examples shown in FIGS. 4B1, 4B2, and 4B3.

[0386] By doing so, it is possible to obtain the effect of improving frequency utilization efficiency.

[0387] 4C1 shows an example of the time and frequency arrangement of modulated communication signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and signals for wireless power transmission transmitted by base station #1 of 301_1. In FIG. 4C1, the horizontal axis represents time and the vertical axis represents frequency.

[0388] 4C1, the modulated signal for communication 401C exists at frequency CC1, and the signal for wireless power transmission 402C exists at frequency CC1. The modulated signal for communication 401C exists at time C1, and the signal for wireless power transmission 402C exists at time C1. Therefore, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0389] 4C2 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same way as in FIG. 4C1 are assigned the same numbers. In FIG. 4C2, the horizontal axis represents time and the vertical axis represents frequency.

[0390] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C2, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0391] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C2, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0392] 4C3 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same way as in FIG. 4C1 are assigned the same numbers. In FIG. 4C3, the horizontal axis represents time and the vertical axis represents frequency.

[0393] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C3, the signal for wireless power transmission 402C exists at frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0394] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C3, the communication modulation signal 401C is set to exist at frequency CC1 and time C1. In this case, the communication modulation signal 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0395] 4C4 shows an example of the time and frequency arrangement of the communication modulated signals transmitted by base station #2 of 301_2, base station #C1 of 391_1, and base station #C2 of 391_2, and the wireless power transmission signal transmitted by base station #1 of 301_1. Components that operate in the same way as in FIG. 4C1 are assigned the same numbers. In FIG. 4C4, the horizontal axis represents time and the vertical axis represents frequency.

[0396] As shown in Fig. 4C1, the modulated signal for communication 401C exists at frequency CC1 and time C1, and as shown in Fig. 4C4, the signal for wireless power transmission 402C exists within frequency CC1 and time C1. At this time, the modulated signal for communication 401C and the signal for wireless power transmission 402C are space division multiplexed (SDM).

[0397] As shown in Fig. 4C1, the wireless power transmission signal 402C is set to exist at frequency CC1 and time C1, and as shown in Fig. 4C4, the modulated signal for communication 401C is set to exist within frequency CC1 and time C1. In this case, the modulated signal for communication 401C and the wireless power transmission signal 402C are space division multiplexed (SDM).

[0398] 4C1, 4C2, 4C3, and 4C4, it is possible to suppress interference between the modulation signal for communication and the signal for wireless power transmission. Note that the method of space division multiplexing (SDM) of the "modulation signal for communication 401C and the signal for wireless power transmission 402C" is not limited to the examples in FIGS. 4C1, 4C2, 4C3, and 4C4. For example, in FIGS. 4C2, 4C3, and 4C4, the "modulation signal for communication 401C and the signal for wireless power transmission 402C" may exist at a time other than C1.

[0399] This can improve frequency utilization efficiency. Since the base station that transmits the modulated signal for communication and the base station that transmits the wireless power transmission signal are different, the directions from which the modulated signal for communication and the wireless power transmission signal arrive at the terminal are different, which can reduce interference.

[0400] The base station #1 of 301_1 and the base station #2 of 301_2 in FIGS. 3A, 3B, 3C, 3D, and 3E transmit signals for wireless power transmission.

[0401] 5A1 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 which the horizontal axis represents time and the vertical axis represents frequency.

[0402] 5A1, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists at frequency AA51, and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists at frequency AA51. The wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists at time A51, and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists at time A51. Therefore, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 are space division multiplexed (SDM).

[0403] Fig. 5A2 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 of 301_1 and base station #2 of 301_2. Components that operate in the same manner as in Fig. 5A1 are assigned the same numbers. In Fig. 5A2, the horizontal axis represents time and the vertical axis represents frequency.

[0404] As shown in Fig. 5A1, a wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists at a frequency AA51 and a time A51, and as shown in Fig. 5A2, a wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists within the frequency AA51 and at a time A51. In this case, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 are space division multiplexed (SDM).

[0405] As shown in Fig. 5A1, a wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists at a frequency AA51 and a time A51, and as shown in Fig. 5A2, a wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists within the frequency AA51 and at a time A51. In this case, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 are space division multiplexed (SDM).

[0406] Fig. 5A3 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). Components that operate in the same manner as in Fig. 5A1 are assigned the same numbers. In Fig. 5A3, the horizontal axis represents time and the vertical axis represents frequency.

[0407] As shown in Fig. 5A1, a wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists at a frequency AA51 and a time A51, and as shown in Fig. 5A3, a wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists at a frequency AA51 and a time A51. In this case, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 are space division multiplexed (SDM).

[0408] 5A1, the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 is set to exist at a frequency AA51 and a time A51, and as shown in FIG. 5A3, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 is set to exist at a frequency AA51 and a time A51. In this case, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 are space division multiplexed (SDM).

[0409] Fig. 5A4 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 of 301_1 and base station #2 of 301_2. Components that operate in the same manner as in Fig. 5A1 are assigned the same numbers. In Fig. 5A4, the horizontal axis represents time and the vertical axis represents frequency.

[0410] As shown in Fig. 5A1, a wireless power transmission signal 591A transmitted by the base station #1 of 301_1 exists at a frequency AA51 and a time A51, and as shown in Fig. 5A4, a wireless power transmission signal 592A transmitted by the base station #2 of 301_2 exists within the frequency AA51 and the time A51. In this case, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 are space division multiplexed (SDM).

[0411] 5A1, the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 is set to exist at a frequency AA51 and a time A51, and as shown in Fig. 5A4, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 is set to exist within the frequency AA51 and the time A51. In this case, the wireless power transmission signal 591A transmitted by the base station #1 of 301_1 and the wireless power transmission signal 592A transmitted by the base station #2 of 301_2 are space division multiplexed (SDM).

[0412] 5A1, 5A2, 5A3, and 5A4, the terminal #1 of 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E can achieve the effect of increasing the efficiency of wireless charging. The detailed operation will be described later.

[0413] In Figures 3A, 3B, 3C, 3D, and 3E, base station #1 at 301_1 and base station #2 at 301_2 will transmit a wireless power transmission signal to terminal #1 at 302_1, and an example of the state at that time will be described.

[0414] 6A shows a first example of a state in which "base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals to terminal #1 of 302_1." As shown in FIG. 6A, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals to terminal #1 of 302_1. Terminal #1 of 302_1 is located in a fixed location (semi-fixed location, with little movement). In this way, "a state in which terminal #1 of 302_1 is located in a fixed location" can be considered as an example of a state.

[0415] 6B shows a second example of a state in which "base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals to terminal #1 of 302_1." As shown in FIG. 6B, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals to terminal #1 of 302_1. Terminal #1 of 302_1 is moving. In this way, "a state in which terminal #1 of 302_1 is moving" can be considered as one example of a state.

[0416] At this time, the terminal #1 of 302_1 can be one of the following three types.

[0417] Type 1_1: Only when the device is in a fixed position as shown in FIG. 6A, the battery can be charged by wireless power transmission.

[0418] Type 1_2: Only when the device is moving as shown in FIG. 6B, the battery can be charged by wireless power transmission.

[0419] Type 1_3: In either the case of a fixed position as shown in FIG. 6A or the case of movement as shown in FIG. 6B, the battery can be charged by wireless power transmission.

[0420] 7 shows an example of a screen displayed on terminal #1 of 302_1 when terminal #1 of 302_1 is type 1_3. For example, when terminal #1 of 302_1 can display on screen 700, it is possible to set any one of "fixed mode," "mobile mode," and "automatic switching mode" as shown in FIG.

[0421] When the "fixed mode" in FIG. 7 is set, terminal #1 of 302_1 will charge its battery by wireless power transmission when its location becomes fixed.

[0422] When the "moving mode" in FIG. 7 is set, terminal #1 of 302_1 charges its battery by wireless power transmission while moving from one location to another.

[0423] When set to "automatic switching mode" in FIG. 7, the terminal 302_1 switches between charging the battery in "fixed mode" and charging the battery in "mobile mode" depending on the location movement status.

[0424] Fig. 8A shows an example of the configuration of a wireless power transmission signal transmitted by base station #1 of 301_1 and base station #2 of 301_2 in Fig. 3A, Fig. 3B, Fig. 3C, Fig. 3D, and Fig. 3E. As shown in Fig. 8A, the wireless power transmission signal 801 is composed of an other signal 891 and a wireless power transmission reference signal 892.

[0425] At this time, a terminal such as terminal #1 of 302_1 can charge its battery by receiving the wireless power transmission reference signal 892. Note that although the signal is called a wireless power transmission reference signal here, it may be called by any other name.

[0426] The other signals 891 include, for example, signals for transmitting control information related to wireless power transmission. The control information related to wireless power transmission may include, for example, information related to the wireless power transmission method, information related to the configuration of the wireless power transmission signal, information related to the destination of the wireless power transmission signal, and information related to resource allocation such as the frequency and time of the wireless power transmission signal.

[0427] For example, the information regarding the method of wireless power transmission may be information indicating which method of wireless power transmission is used: "transmitting a wireless power transmission signal corresponding to the fixed mode in Figure 7" or "transmitting a wireless power transmission signal corresponding to the mobile mode in Figure 7."

[0428] It is to be noted that it may be possible to specify a wireless power transmission method other than the "wireless power transmission method for transmitting a wireless power transmission signal corresponding to the fixed mode in FIG. 7" or the "wireless power transmission method for transmitting a wireless power transmission signal corresponding to the mobile mode in FIG. 7."

[0429] The information on the configuration of the signal for wireless power transmission may be, for example, information on the signal of the reference signal for wireless power transmission 892 .

[0430] The information relating to the destination of the wireless power transmission signal may be, for example, information relating to a wireless device such as a terminal that is the destination of the wireless power transmission signal.

[0431] The information regarding resource allocation such as frequency and time of the wireless power transmission signal may be information regarding resource allocation such as frequency, time, frequency bandwidth, and time width in which the ``wireless power transmission signal and / or wireless power transmission reference signal 892'' exists.

[0432] The "other signals 891" and the "reference signal for wireless power transmission 892" constituting the reference signal for wireless power transmission 892 may be arranged, for example, consecutively in time or at positions spaced apart in time. The "other signals 891" and the "reference signal for wireless power transmission 892" may be arranged, for example, consecutively in frequency or at positions spaced apart in frequency. A specific example will be described.

[0433] 8B1 shows an example of the arrangement of a wireless power transmission signal 801, including an "other signal 891" and a "wireless power transmission reference signal 892," on the time and frequency axes. In FIG. 8B1, the vertical axis represents frequency, and the horizontal axis represents time.

[0434] 8B1 is an example in which the "other signals 891" and the "reference signal for wireless power transmission 892" are arranged consecutively in time. As shown in FIG. 8B1, the frequency and frequency bandwidth at which the "other signals 891" exist and the frequency and frequency bandwidth at which the "reference signal for wireless power transmission 892" exist may be the same. Furthermore, the frequency bandwidth at which the "other signals 891" exist and the frequency bandwidth at which the "reference signal for wireless power transmission 892" exist may be the same or different.

[0435] 8B2 shows an example of the arrangement of the wireless power transmission signal 801, including the "other signal 891" and the "wireless power transmission reference signal 892," on the time and frequency axes. In FIG. 8B2, the vertical axis represents frequency, and the horizontal axis represents time.

[0436] 8B2 shows an example in which the "other signals 891" and the "reference signal for wireless power transmission 892" are arranged discretely in time. As shown in FIG. 8B2, the frequency and frequency bandwidth at which the "other signals 891" exist and the frequency and frequency bandwidth at which the "reference signal for wireless power transmission 892" exist may be the same. Furthermore, the frequency bandwidth at which the "other signals 891" exist and the frequency bandwidth at which the "reference signal for wireless power transmission 892" exist may be the same or different.

[0437] 8B3 shows an example of the arrangement of the wireless power transmission signal 801, including the "other signal 891" and the "wireless power transmission reference signal 892," on the time and frequency axes. In FIG. 8B3, the vertical axis represents frequency, and the horizontal axis represents time.

[0438] 8B3 shows an example in which the "other signals 891" and the "reference signal for wireless power transmission 892" are arranged consecutively in frequency. As shown in FIG. 8B3, the time and duration during which the "other signals 891" are present and the time and duration during which the "reference signal for wireless power transmission 892" are present may be the same. Furthermore, the duration during which the "other signals 891" are present and the duration during which the "reference signal for wireless power transmission 892" are present may be the same or different.

[0439] Fig. 8B4 shows an example of the arrangement on the time and frequency axes of the wireless power transmission signal 801 including the "other signal 891" and the "wireless power transmission reference signal 892." In Fig. 8B4, the vertical axis represents frequency and the horizontal axis represents time.

[0440] 8B4 shows an example in which the "other signals 891" and the "reference signal for wireless power transmission 892" are discretely arranged in frequency. As shown in FIG. 8B4, the time and duration during which the "other signals 891" are present and the time and duration during which the "reference signal for wireless power transmission 892" are present may be the same. Furthermore, the duration during which the "other signals 891" are present and the duration during which the "reference signal for wireless power transmission 892" are present may be the same or different.

[0441] Fig. 8B5 shows an example of the arrangement on the time and frequency axes of the wireless power transmission signal 801 including the "other signal 891" and the "wireless power transmission reference signal 892." In Fig. 8B5, the vertical axis represents frequency and the horizontal axis represents time.

[0442] FIG. 8B5 shows an example in which "other signals 891" and "reference signals for wireless power transmission 892" are arranged consecutively in terms of frequency and time.

[0443] Fig. 8B6 shows an example of the arrangement of the wireless power transmission signal 801, including the "other signal 891" and the "wireless power transmission reference signal 892", on the time and frequency axes. In Fig. 8B6, the vertical axis represents frequency and the horizontal axis represents time.

[0444] 8B6 shows an example in which the "other signals 891" and the "reference signal for wireless power transmission 892" are arranged consecutively in time. As shown in FIG. 8B6, the frequency width in which the "other signals 891" are present and the frequency width in which the "reference signal for wireless power transmission 892" is present may be different.

[0445] Fig. 8B7 shows an example of the arrangement of the wireless power transmission signal 801, including the "other signal 891" and the "wireless power transmission reference signal 892", on the time and frequency axes. In Fig. 8B7, the vertical axis represents frequency and the horizontal axis represents time.

[0446] 8B7 shows an example in which the "other signals 891" and the "reference signal for wireless power transmission 892" are arranged discretely in time. As shown in FIG. 8B7, the frequency width in which the "other signals 891" are present and the frequency width in which the "reference signal for wireless power transmission 892" is present may be different.

[0447] Fig. 9A shows an example of a state on the time axis when base station #1 of 301_1 and base station #2 of 301_2 in Fig. 3A, Fig. 3B, Fig. 3C, Fig. 3D, and Fig. 3E transmit wireless power transmission signals using SDM, as explained using Fig. 5A1, Fig. 5A2, Fig. 5A3, Fig. 5A4, Fig. 5B1, Fig. 5B2, and Fig. 5B3. In Fig. 9A, the horizontal axis represents time.

[0448] It is assumed that the base station #1 of 301_1 transmits the wireless power transmission signal #1 of 900_1, and the base station #2 of 301_2 transmits the wireless power transmission signal #2 of 900_2.

[0449] Then, from time Ta to time Tb, base station #1 of 301_1 transmits other signal #1 of 901_1, and base station #2 of 301_2 transmits other signal #2 of 901_2. The configurations of other signal #1 of 901_1 and other signal #2 of 901_2 are the same as those of other signal 891.

[0450] Assume that from time Tb to time Tc, the base station #1 of 301_1 transmits a wireless power transmission reference signal #1 of 902_1, and the base station #2 of 301_2 transmits a wireless power transmission reference signal #2 of 902_2. Note that the configurations of the wireless power transmission reference signal #1 of 902_1 and the wireless power transmission reference signal #2 of 902_2 are the same as those of the wireless power transmission reference signal 892.

[0451] Fig. 9B1 shows an example of the configuration of the reference signal #1 for wireless power transmission 902_1 and the reference signal #2 for wireless power transmission 902_2 in Fig. 9A. Note that in Fig. 9B1, the horizontal axis represents time.

[0452] 9A , for example, symbol 1 of 951_1 exists at time 1, symbol 2 of 951_2 exists at time 2, ..., symbol P of 951_P exists at time P. Therefore, symbol i of 951_i exists at time i in reference signal #1 for wireless power transmission of 902_1. Note that i is an integer between 1 and P, inclusive, and P is an integer greater than or equal to 1.

[0453] 9A , for example, symbol 1 of 951_1 exists at time 1, symbol 2 of 951_2 exists at time 2, ..., symbol P of 951_P exists at time P. Therefore, symbol i of 951_i exists at time i in reference signal #2 for wireless power transmission of 902_2. Note that i is an integer between 1 and P, inclusive, and P is an integer greater than or equal to 1.

[0454] Fig. 9B2 shows an example of the configuration of the wireless power transmission reference signal #1 of 902_1 and the wireless power transmission reference signal #2 of 902_2 in Fig. 9A, which is different from Fig. 9B1. Note that in Fig. 9B2, the horizontal axis represents time and the vertical axis represents frequency.

[0455] In the wireless power transmission reference signal #1 of 902_1 in FIG. 9A, for example, symbol 11 of 961_11 is present on carrier 1 at time 1, symbol 21 of 961_21 is present on carrier 2 at time 1, ..., symbol Q1 of 961_Q1 is present on carrier Q at time 1.

[0456] 9A, symbol 12 of 961_12 is present on carrier 1 at time 2, symbol 22 of 961_22 is present on carrier 2 at time 2, ..., symbol Q2 of 961_Q2 is present on carrier Q at time 2. ... In reference signal #1 for wireless power transmission of 902_1 in Fig. 9A, symbol 1P of 961_1P is present on carrier 1 at time P, symbol 2P of 961_2P is present on carrier P at time 2, ..., symbol QP of 961_QP is present on carrier Q at time 2.

[0457] Therefore, in the reference signal #1 for wireless power transmission 902_1, the symbol sr of 961_sr exists at time r and carrier s. Here, r is an integer between 1 and P, and P is an integer greater than or equal to 1. s is an integer between 1 and Q, and Q is an integer greater than or equal to 1.

[0458] In the wireless power transmission reference signal #2 of 902_2 in FIG. 9A, for example, symbol 11 of 961_11 is present on carrier 1 at time 1, symbol 21 of 961_21 is present on carrier 2 at time 1, ..., symbol Q1 of 961_Q1 is present on carrier Q at time 1.

[0459] 9A , symbol 12 of 961_12 is present on carrier 1 at time 2, symbol 22 of 961_22 is present on carrier 2 at time 2, ..., symbol Q2 of 961_Q2 is present on carrier Q at time 2. ... In reference signal #2 for wireless power transmission 902_2 in Fig. 9A , symbol 1P of 961_1P is present on carrier 1 at time P, symbol 2P of 961_2P is present on carrier P at time 2, ..., symbol QP of 961_QP is present on carrier Q at time 2.

[0460] Therefore, in the reference signal #2 for wireless power transmission 902_2, the symbol sr of 961_sr exists at time r and carrier s. Here, r is an integer between 1 and P, inclusive, and P is an integer greater than or equal to 1. s is an integer between 1 and Q, inclusive, and Q is an integer greater than or equal to 1.

[0461] Assume that base station #1 301_1 in Figures 3A, 3B, 3C, 3D, and 3E generates reference signal #1 for wireless power transmission 902_1 as shown in Figure 9B1 or 9B2. In this case, reference signal #1 for wireless power transmission 902_1 at time t is represented as Ref1(t). Note that Ref1(t) is represented by a complex number.

[0462] Also, assume that base station #2 301_2 in Figures 3A, 3B, 3C, 3D, and 3E generates reference signal #2 for wireless power transmission 902_2 as shown in Figure 9B1 or 9B2. In this case, reference signal #2 for wireless power transmission 902_2 at time t is represented as Ref2(t). Note that Ref2(t) is represented by a complex number.

[0463] Condition 1_1: Then, when u is an integer between 1 and P, Ref1(u) = Ref2(u) is assumed to be true for all u. Alternatively, when v is a real number between Tb and Tc, Ref1(v) = Ref2(v) is assumed to be true (Ref1(u) and Ref2(u) are the same signal) (Note that Tb<Tc is assumed to be true).

[0464] It is assumed that this condition is satisfied and base station #1 301_1 in Figures 3A, 3B, 3C, 3D, and 3E transmits wireless power transmission reference signal #1 902_1, and base station #2 301_2 in Figures 3A, 3B, 3C, 3D, and 3E transmits wireless power transmission reference signal #2 902_2. Therefore, base station #1 301_1 having the configuration of Figure 11 generates wireless power transmission reference signal #1 that satisfies the above condition in signal generation unit 1101, and base station #2 301_2 having the configuration of Figure 11 generates wireless power transmission reference signal #2 that satisfies the above condition in signal generation unit 1101. Note that specific operations in Figure 11 will be described later.

[0465] 3A, 3B, 3C, 3D, and 3E, the propagation coefficient between base station #1 of 301_1 and terminal #1 of 302_1 is defined as h1(t), and the propagation coefficient between base station #2 of 301_2 and terminal #1 of 302_1 is defined as h2(t). Note that h1(t) and h2(t) can be expressed as complex numbers.

[0466] Then, the received signal of the reference signal for wireless power transmission of terminal #1 of 302_1 can be expressed as h1(t)×Ref1(t)+h2(t)×Ref2(t).

[0467] When the phase difference between the phase of h1(t) and the phase of h2(t) is (close to) 0 radians, that is, when they are in phase, terminal #1 of 302_1 can in-phase combine wireless power transmission reference signal #1 of 902_1 and wireless power transmission reference signal #2 of 902_2.

[0468] When the phase difference between the phase of h1(t) and the phase of h2(t) is (close to) π radians, that is, when they are in opposite phase, terminal #1 of 302_1 performs an inverse phase synthesis of wireless power transmission reference signal #1 of 902_1 and wireless power transmission reference signal #2 of 902_2.

[0469] 10 shows an example of the received power at terminal #1 of 302_1 when in-phase combining and out-of-phase combining are performed, when base station #1 of 301_1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits wireless power transmission reference signal #1 of 902_1 and base station #2 of 301_2 transmits wireless power transmission reference signal #2. In FIG. 10, the horizontal axis represents time.

[0470] In Fig. 10, the state of the received power when in-phase combining is possible is indicated by 1002, and the state of the received power when anti-phase combining is possible is indicated by 1001. As shown in Fig. 10, the received power 1002 when in-phase combining is possible is greater than the received power 1001 when anti-phase combining is possible, and when in-phase combining is possible, terminal #1 of 302_1 can efficiently charge a battery or the like.

[0471] Therefore, for efficient charging of batteries and the like, it is important to introduce a wireless power transmission method that allows terminal #1 of 302_1 to receive signals in a state close to in-phase synthesis.

[0472] Fig. 11 shows an example of the configuration of the base station #1 of 301_1 and the base station #2 of 301_2, which allows the terminal #1 of 302_1 to receive signals in a state close to in-phase combining. Note that Fig. 11 shows the configuration of the part related to wireless power transmission.

[0473] The signal generating unit 1101 receives the control signal 1100 as input, generates a signal indicated by the control signal 1100 , and outputs a signal 1102 for wireless power transmission.

[0474] For example, when the control signal 1100 indicates "transmitting other signals," the signal generating unit 1101 outputs a signal for wireless power transmission 1102 corresponding to the other signals.

[0475] Furthermore, when the control signal 1100 indicates that a wireless power transmission reference signal is to be transmitted, the signal generating unit 1101 outputs a wireless power transmission signal 1102 that corresponds to the wireless power transmission reference signal.

[0476] The phase adjustment unit 1103 receives the wireless power transmission signal 1102 and the control signal 1100 as input, and when the control signal 1100 indicates that phase adjustment is to be performed, changes the phase of the wireless power transmission signal 1102 and outputs a signal 1104. When the control signal 1100 indicates that phase adjustment is not to be performed, the phase adjustment unit 1103 does not perform phase adjustment on the wireless power transmission signal 1102 and outputs a signal 1104. Note that although the phase adjustment unit 1103 is referred to here, it may also be referred to as a phase change unit. This point will be explained later.

[0477] The power transmitting antenna unit 1105 receives the signal 1104 and the control signal 1100 as input, performs control in accordance with the instructions of the control signal 1100, and outputs the signal 1104 as a radio wave.

[0478] 11 is merely an example, and the present invention is not limited to this configuration. For example, the signal generating unit 1101 and the phase adjusting unit (phase changing unit) 1103 may be integrated into one processing unit.

[0479] For example, when the base station #1 of 301_1 in FIGS. 3A, 3B, 3C, 3D, and 3E performs phase adjustment, the reference signal for wireless power transmission is Ref1(t)×e ｊθ１ Therefore, the reference signal for wireless power transmission received by terminal #1 of 302_1 is expressed as h1(t)×Ref1(t)×e ｊθ１ In addition, the base station #1 of 301_1 having the configuration of FIG. 11 adjusts the phase of the ｊθ１ " where j is the imaginary unit.

[0480] 3A, 3B, 3C, 3D, and 3E, when the base station #2 of 301_2 performs phase adjustment, the reference signal for wireless power transmission is Ref2(t)×e ｊθ２ Therefore, the reference signal for wireless power transmission received by terminal #1 of 302_1 is expressed as h2(t)×Ref2(t)×e ｊθ２ In addition, the base station #2 of 301_2 having the configuration of FIG. 11 adjusts the phase of the ｊθ２ " will be processed.

[0481] Therefore, the composite signal of "the reference signal for wireless power transmission transmitted by the base station #1 of 301_1 and the reference signal for wireless power transmission transmitted by the base station #2 of 301_2" received by the terminal #1 of 302_1 is h1(t)×Ref1(t)×e ｊθ１ +h2(t)×Ref2(t)×e ｊθ２ It is expressed as follows.

[0482] Therefore, the phase adjustment e by the base station #1 of 301_1 ｊθ１ and / or phase adjustment e by base station #2 of 301_2 ｊθ２ This allows terminal #1 of 301_1 to obtain the state of received power 1002 when in-phase combining is possible in Fig. 10. This allows terminal #1 of 301_1 to obtain high battery charging efficiency.

[0483] In the base station #1 of 301_1 having the configuration of FIG. 11, the signal generation unit 1101 generates and outputs Ref1(t). ｊθ１ and perform phase adjustment related to Ref1(t)×e ｊθ１ The base station #1 of the base station 301_1 generates Ref1(t)×e ｊθ１ will transmit a signal equivalent to

[0484] In addition, in the base station #2 of 301_2 having the configuration of FIG. 11, the signal generation unit 1101 generates and outputs Ref2(t). Then, the phase adjustment unit 1103 adjusts e ｊθ２ and perform phase adjustment related to Ref2(t)×e ｊθ２The base station #2 of 301_2 generates Ref2(t)×e ｊθ２ will transmit a signal equivalent to

[0485] An example of a procedure for the base station #1 of 301_1 and the base station #2 of 301_2 to perform phase adjustment in FIGS. 3A, 3B, 3C, 3D, and 3E will be described.

[0486] As shown in Fig. 12A, base station #1 of 301_1 and base station #2 of 301_2 in Fig. 3A, Fig. 3B, Fig. 3C, Fig. 3D, and Fig. 3E transmit reference signals 1291. Note that in Fig. 12A, the horizontal axis represents time. Furthermore, base station #1 of 301_1 and base station #2 of 301_2 may transmit reference signals simultaneously or at different times.

[0487] Figure 12B shows an example of the exchange that occurs when "base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E perform phase adjustment on the reference signal for wireless power transmission."

[0488] The base station #1 of 301_1 and the base station #2 of 301_2 in FIGS. 3A, 3B, 3C, 3D, and 3E transmit the reference signal shown in FIG. 12A (1201).

[0489] 3A, 3B, 3C, 3D, and 3E, terminal #1 of 302_1 receives the reference signal transmitted by base station #1 of 301_1 and the reference signal transmitted by base station #2 of 301_2 (1221).

[0490] Terminal #1 of 302_1 determines "a phase adjustment value for the phase adjustment to be performed by base station #1 of 301_1" and "a phase adjustment value for the phase adjustment to be performed by base station #2 of 301_2" from the phase relationship between "the reference signal transmitted by base station #1 of 301_1" and "the reference signal transmitted by base station #2 of 301_2" (1222).

[0491] Then, terminal #1 of 302_1 transmits information on "phase adjustment value for phase adjustment performed by base station #1 of 301_1" and information on "phase adjustment value for phase adjustment performed by base station #2 of 301_2" to the base station for communication (1223).

[0492] The method of locating the base station for communication is as shown in Figures 3A, 3B, 3C, 3D, and 3E. Therefore, base station #1 of 301_1 and base station #2 of 301_2 may be the base station for communication. This also applies hereinafter.

[0493] The communication base station receives the information of "phase adjustment value for phase adjustment performed by base station #1 of 301_1" and the information of "phase adjustment value for phase adjustment performed by base station #2 of 301_2" transmitted by terminal #1 of 302_1 (1241).

[0494] The communication base station transmits information on "phase adjustment values ​​for phase adjustment performed by base station #1 of 301_1" and information on "phase adjustment values ​​for phase adjustment performed by base station #2 of 301_2" to base station #1 of 301_1 and base station #2 of 301_2 (1242).

[0495] Base station #1 of 301_1 and base station #2 of 301_2 receive information on "phase adjustment value for phase adjustment performed by base station #1 of 301_1" and information on "phase adjustment value for phase adjustment performed by base station #2 of 301_2" (1202).

[0496] Then, the base station #1 of 301_1 performs a phase adjustment on the wireless power transmission signal including the wireless power transmission reference signal based on the information of "phase adjustment value for phase adjustment performed by the base station #1 of 301_1," and transmits the wireless power transmission signal including the phase-adjusted wireless power transmission reference signal to the terminal #1 of 302_1. Furthermore, the base station #2 of 301_2 performs a phase adjustment on the wireless power transmission signal including the wireless power transmission reference signal based on the information of "phase adjustment value for phase adjustment performed by the base station #2 of 301_2," and transmits the wireless power transmission signal including the phase-adjusted wireless power transmission reference signal to the terminal #1 of 302_1. (1203) An example of the process at this time is as described using FIGS. 9A, 9B1, and 9B2. However, the present invention is not limited to these examples.

[0497] Terminal #1 of 302_1 receives a wireless power transmission signal including a phase-adjusted wireless power transmission reference signal transmitted by base station #1 of 301_1 and a wireless power transmission signal including a phase-adjusted wireless power transmission reference signal transmitted by base station #2 of 301_2, and charges its battery (1224).

[0498] This allows the terminal #1 of 302_1 to obtain the effect of achieving high battery charging efficiency.

[0499] In addition, when base station #1 of 301_1 and / or base station #2 of 301_2 performs transmission directivity control (transmission beamforming) on ​​a wireless power transmission signal, it is preferable to perform a procedure for transmission directivity control (transmission beamforming) before the "interaction in Figure 12B when base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E perform phase adjustment on a wireless power transmission reference signal."

[0500] Furthermore, when a communication base station transmits a modulated signal for communication to a terminal, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) may be used.

[0501] Another example will now be described.

[0502] As shown in Figure 13A, terminal #1 of 302_1 in Figures 3A, 3B, 3C, 3D, and 3E transmits a reference signal 1391 to base station #1 of 301_1 and base station #2 of 301_2. Note that in Figure 13A, the horizontal axis represents time. Terminal #1 of 302_1 may also transmit a reference signal individually to base station #1 of 301_1 and base station #2 of 301_2.

[0503] Figure 13B shows an example of the exchange that occurs when "base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E perform phase adjustment on the reference signal for wireless power transmission."

[0504] Terminal #1 of 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits the reference signal shown in FIG. 13A (1321).

[0505] 3A, 3B, 3C, 3D, and 3E, base station #1 of 301_1 and base station #2 of 301_2 receive a reference signal (1301). Then, base station #1 of 301_1 and / or base station #2 of 301_2 and / or other devices determine "phase adjustment values ​​for phase adjustment to be performed by base station #1 of 301_1" and "phase adjustment values ​​for phase adjustment to be performed by base station #2 of 301_2" from the phase relationship between "the reference signal received by base station #1 of 301_1" and "the reference signal received by base station #2 of 301_2" (1302).

[0506] Then, base station #1 of 301_1 performs phase adjustment on the wireless power transmission signal including the wireless power transmission reference signal based on the determined "phase adjustment value for phase adjustment performed by base station #1 of 301_1," and transmits the wireless power transmission signal including the phase-adjusted wireless power transmission reference signal to terminal #1 of 302_1. Also, base station #2 of 301_2 performs phase adjustment on the wireless power transmission signal including the wireless power transmission reference signal based on the determined "phase adjustment value for phase adjustment performed by base station #2 of 301_2," and transmits the wireless power transmission signal including the phase-adjusted wireless power transmission reference signal to terminal #1 of 302_1 (1303).

[0507] Terminal #1 at 302_1 receives the wireless power transmission signal including the phase-adjusted wireless power transmission reference signal transmitted by base station #1 at 301_1 and the wireless power transmission signal including the phase-adjusted wireless power transmission reference signal transmitted by base station #2 at 301_2, and charges its battery (1322). An example of this situation is as described using Figures 9A, 9B1, and 9B2. However, the present invention is not limited to these examples.

[0508] This allows the terminal #1 of 302_1 to obtain the effect of achieving high battery charging efficiency.

[0509] In addition, when base station #1 of 301_1 and / or base station #2 of 301_2 performs transmission directivity control (transmission beamforming) on ​​a wireless power transmission signal, it is preferable to perform a procedure for transmission directivity control (transmission beamforming) before the "interaction in Figure 13B when base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E perform phase adjustment on a wireless power transmission reference signal."

[0510] Furthermore, when a communication base station transmits a modulated signal for communication to a terminal, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) may be used.

[0511] By doing the above, terminal #1 of 302_1 can receive the reference signal for wireless power transmission in the "state 1002 where in-phase synthesis has been achieved (or is close to being achieved)" shown in Figure 10, making it possible to achieve high charging efficiency.

[0512] Although the method in which multiple base stations transmit phase-adjusted wireless power transmission reference signals to generate a state close to in-phase combining has been described, this method is effective when, for example, terminal #1 of 302_1 is in a fixed state as shown in Fig. 6A (fixed mode in Fig. 7). Therefore, when multiple base stations transmit wireless power transmission signals to terminal 302_1 using the "method in which multiple base stations transmit phase-adjusted wireless power transmission reference signals to generate a state close to in-phase combining," this is equivalent to the multiple base stations deciding to transmit wireless power transmission signals in the "fixed mode."

[0513] For example, Figure 14 shows an example of the received power state of terminal #1 of 302_1 when terminal #1 of 302_1 moves as shown in Figure 6B and multiple base stations transmit phase-adjusted reference signals for wireless power transmission.

[0514] 14 shows an example of the received power of terminal #1 of 302_1 when base station #1 of 301_1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits wireless power transmission reference signal #1 of 902_1 and base station #2 of 301_2 transmits wireless power transmission reference signal #2 of 902_2. In FIG. 14, the horizontal axis represents time. It is assumed that "wireless power transmission reference signal #1 of 902_1 and wireless power transmission reference signal #2 of 902_2" satisfy condition 1_1 described above.

[0515] 14, when terminal #1 of 302_1 receives "reference signal #1 for wireless power transmission of 902_1 and reference signal #2 for wireless power transmission of 902_2," the state when they are combined in opposite phases is assumed to be 1401. Also, when terminal #1 of 302_1 receives "reference signal #1 for wireless power transmission of 902_1 and reference signal #2 for wireless power transmission of 902_2," the state when they are combined in the same phase is assumed to be 1402.

[0516] It is assumed that terminal #1 of 302_1 moves as shown in FIG. 6B from time Tb to time Tc in FIG.

[0517] For example, as described above, it is assumed that base station #1 of 301_1 and terminal #1 of 302_1 communicate with each other for phase adjustment, and at time Tb in Fig. 14, base station #1 of 301_1 starts transmitting phase-adjusted reference signal #1 for wireless power transmission of 902_1. Also, as described above, base station #2 of 301_2 and terminal #1 of 302_1 communicate with each other for phase adjustment, and at time Tb in Fig. 14, base station #2 of 301_2 starts transmitting phase-adjusted reference signal #2 for wireless power transmission of 902_2.

[0518] At this time, 1491 shows the state of the received power when terminal #1 of 302_1 receives "reference signal #1 for wireless power transmission of 902_1 and reference signal #2 for wireless power transmission of 902_2." The state of the received power 1491 is close to the received power when in-phase combining is possible at time Tb, but a difference occurs from the state when in-phase combining is possible as time moves away from Tb. For example, as shown in 1499, the state of the received power 1491 may be close to the received power when combining is possible in opposite phases.

[0519] One method for overcoming this problem is to increase the frequency of exchanges for phase adjustment between the base station #1 of 301_1 and the terminal #1 of 302_1, and the frequency of exchanges for phase adjustment between the base station #2 of 301_2 and the terminal #1 of 302_1. For this purpose, the terminal may request exchanges for phase adjustment.

[0520] The above description is an example of operation when "when base station #1 301_1 in Figures 3A, 3B, 3C, 3D, and 3E transmits reference signal #1 for wireless power transmission 902_1 and base station #2 301_2 transmits reference signal #2 for wireless power transmission 902_2, the difference (time offset) between "the arrival time of reference signal #1 for wireless power transmission 902_1 at terminal #1 of 302_1" and "the arrival time of reference signal #2 for wireless power transmission 902_2 at terminal #1" is small."

[0521] 9A, for example, it is assumed that base station #1 of 301_1 starts transmitting wireless power transmission reference signal #1 of 902_1 at time Tb, and terminal #1 of 302_1 receives wireless power transmission reference signal #1 of 902_1 at time Tb+c1.

[0522] Furthermore, it is assumed that the base station #2 of 301_2 starts transmitting the reference signal #2 for wireless power transmission of 902_2 at time Tb, and the terminal #1 of 302_1 receives the reference signal #2 for wireless power transmission of 902_2 at time Tb+c2.

[0523] The above explanation applies when c1≈c2.

[0524] When c1≠c2, it is advisable to "adjust the timing at which base station #1 of 301_1 transmits reference signal #1 for wireless power transmission of 902_1" and / or "adjust the timing at which base station #2 of 301_2 transmits reference signal #2 for wireless power transmission of 902_2" so that the start time of reception of "reference signal #1 for wireless power transmission of 902_1 transmitted by base station #1 of 301_1" by terminal #1 of 302_1 is aligned with the start time of reception of "reference signal #2 for wireless power transmission of 902_2 transmitted by base station #2 of 301_2" by terminal #1 of 302_1.

[0525] Therefore, the base station #1 of 301_1 and the base station #2 of 301_2 adjust the transmission timing of the wireless power transmission signal.

[0526] FIG. 15A shows an example of the exchange that occurs when “base station #1 of 301_1 and base station #2 of 301_2 in FIGS. 3A, 3B, 3C, 3D, and 3E perform transmission timing adjustment for a wireless power transmission reference signal (which may also be a wireless power transmission signal).”

[0527] The base station #1 of 301_1 and the base station #2 of 301_2 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits, for example, the reference signal shown in FIG. 12A (1511).

[0528] 3A, 3B, 3C, 3D, and 3E, terminal #1 of 302_1 receives the reference signal transmitted by base station #1 of 301_1 and the reference signal transmitted by base station #2 of 301_2 (1531).

[0529] Terminal #1 of 302_1 determines "a timing adjustment value for the transmission timing control of the wireless power transmission signal performed by base station #1 of 301_1" and "a timing adjustment value for the transmission timing control of the wireless power transmission signal performed by base station #2 of 301_2" based on the relationship between the reception timings of "the reference signal transmitted by base station #1 of 301_1" and "the reference signal transmitted by base station #2 of 301_2" (1532).

[0530] Then, terminal #1 of 302_1 transmits information on "timing adjustment values ​​for transmission timing control of wireless power transmission signals performed by base station #1 of 301_1" and information on "timing adjustment values ​​for transmission timing control of wireless power transmission signals performed by base station #2 of 301_2" to the base station with which it communicates (1533).

[0531] The method of locating the base station for communication is as shown in Figures 3A, 3B, 3C, 3D, and 3E. Therefore, base station #1 of 301_1 and base station #2 of 301_2 may be the base station for communication. This also applies hereinafter.

[0532] The communication base station receives the information of "timing adjustment value for transmission timing control of wireless power transmission signals performed by base station #1 of 301_1" and the information of "timing adjustment value for transmission timing control of wireless power transmission signals performed by base station #2 of 301_2" transmitted by terminal #1 of 302_1 (1551).

[0533] The communication base station transmits information on "timing adjustment values ​​for transmission timing control of wireless power transmission signals performed by base station #1 of 301_1" and information on "timing adjustment values ​​for transmission timing control of wireless power transmission signals performed by base station #2 of 301_2" to base station #1 of 301_1 and base station #2 of 301_2 (1552).

[0534] Base station #1 of 301_1 and base station #2 of 301_2 receive information on "timing adjustment values ​​for transmission timing control of wireless power transmission signals performed by base station #1 of 301_1" and information on "timing adjustment values ​​for transmission timing control of wireless power transmission signals performed by base station #2 of 301_2" (1512).

[0535] Then, base station #1 of 301_1 adjusts the transmission timing of the wireless power transmission signal including the wireless power transmission reference signal based on the information of "timing adjustment value for transmission timing control of the wireless power transmission signal performed by base station #1 of 301_1," and transmits the wireless power transmission signal including the wireless power transmission reference signal after the transmission timing adjustment to terminal #1 of 302_1. Also, base station #2 of 301_2 adjusts the transmission timing of the wireless power transmission signal including the wireless power transmission reference signal based on the information of "timing adjustment value for transmission timing control of the wireless power transmission signal performed by base station #2 of 301_2," and transmits the wireless power transmission signal including the wireless power transmission reference signal after the transmission timing adjustment to terminal #1 of 302_1. (1513)

[0536] Thereafter, the base station #1 of 301_1 and the base station #2 of 301_2 may perform processing other than the transmission timing, such as phase adjustment, phase change, etc. This point is explained in the present specification.

[0537] For example, the exchange in Figures 12B and 13B when "base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E perform phase adjustment on the reference signal for wireless power transmission" may be performed before and / or after the exchange in Figure 15A when "base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E perform transmission timing adjustment on the reference signal for wireless power transmission (which may be a wireless power transmission signal)."

[0538] This allows the terminal #1 of 302_1 to obtain the effect of achieving high battery charging efficiency.

[0539] Note that the base station #1 of 301_1 and / or the base station #2 of 301_2 may perform transmission directivity control (transmission beamforming) on ​​the wireless power transmission signal.

[0540] Furthermore, when a communication base station transmits a modulated signal for communication to a terminal, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) may be used.

[0541] Furthermore, the order of the exchange between the base station and the terminal for adjusting the transmission timing in FIG. 15A and the exchange between the base station and the terminal for processing other than the transmission timing, such as "phase change, phase adjustment," may be any order.

[0542] 15B shows an example of the configuration of base station #1 of 301_1 and base station #2 of 301_2 when transmission timing control is performed. Note that components that operate in the same manner as in FIG. 11 are assigned the same numbers, and some explanations will be omitted.

[0543] The signal generating unit 1101 receives the control signal 1100 as input, generates a signal indicated by the control signal 1100 , and outputs a signal 1598 for wireless power transmission.

[0544] For example, when the control signal 1100 indicates "transmit other signals," the signal generating unit 1101 outputs a signal for wireless power transmission 1598 that corresponds to the other signals.

[0545] Furthermore, when the control signal 1100 indicates that a wireless power transmission reference signal is to be transmitted, the signal generating unit 1101 outputs a wireless power transmission signal 1598 that corresponds to the wireless power transmission reference signal.

[0546] The timing adjustment unit 1599 receives the wireless power transmission signal 1598 and the control signal 1100, performs timing control based on the information on the "timing adjustment value" included in the control signal 1100, and outputs the wireless power transmission signal 1102 after adjusting the transmission timing. Note that the method by which the base station #1 of 301_1 and the base station #2 of 301_2 obtain the information on the "timing adjustment value" has already been explained, and therefore will not be explained again.

[0547] The phase adjustment unit 1103 receives the wireless power transmission signal 1102 after the transmission timing adjustment and the control signal 1100. If the control signal 1100 indicates that phase adjustment is to be performed, the phase adjustment unit 1103 changes the phase of the wireless power transmission signal 1102 after the transmission timing adjustment and outputs a signal 1104. If the control signal 1100 indicates that phase adjustment is not to be performed, the phase adjustment unit 1103 does not adjust the phase of the wireless power transmission signal 1102 after the transmission timing adjustment and outputs a signal 1104. Note that although the phase adjustment unit 1103 is referred to here, it may also be referred to as a phase change unit. This point will be explained later.

[0548] The power transmitting antenna unit 1105 receives the signal 1104 and the control signal 1100 as input, performs control in accordance with the instructions of the control signal 1100, and outputs the signal 1104 as a radio wave.

[0549] 15B is merely an example, and the present invention is not limited to this configuration. For example, the timing adjustment unit 1599 may be inserted after the phase adjustment unit (phase change unit) 1103, or may be inserted at another position.

[0550] As described above, when base station #1 of 301_1 and base station #2 of 301_2 perform transmission timing control, for example, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals as shown in Fig. 15C. Note that in Fig. 15C, the same numbers are used for components that operate in the same way as in Fig. 9A.

[0551] The base station #1 of 301_1 transmits the wireless power transmission signal #1 of 900_1 from time Ta to time Tc inclusive. The base station #2 of 301_2 transmits the wireless power transmission signal #2 of 900_2 from time Ta+δ to time Tc+δ inclusive, where δ is a real number.

[0552] Then, because base station #1 of 301_1 and base station #2 of 301_2 perform transmission timing control on the wireless power transmission signal, terminal #1 of 302_1 simultaneously receives "signal #1 for wireless power transmission of 900_1 transmitted by base station #1 of 301_1" and "signal #2 for wireless power transmission of 900_2 transmitted by base station #2 of 301_2." In other words, terminal #1 of 302_1 receives the signals as shown in FIG. 15D.

[0553] 15D shows a state on the time axis when terminal #1 of 302_1 receives "signal #1 for wireless power transmission of 900_1 transmitted by base station #1 of 301_1" and "signal #2 for wireless power transmission of 900_2 transmitted by base station #2 of 301_2." In FIG. 15D, the horizontal axis represents time. Base station #1 of 301_1 and base station #2 of 301_2 perform transmission timing control, so that "signal #1 for wireless power transmission of 900_1 and signal #2 for wireless power transmission of 900_2" are present from time Tra to time Trc in terminal #1 of 302_1. Furthermore, "other signal #1 for 901_1 and other signal #2 for 901_2" are present from time Tra to time Trb in terminal #1 of 302_1. In terminal #1 of 302_1, "reference signal #1 for wireless power transmission of 902_1 and reference signal #2 for wireless power transmission of 902_2" exist from time Trb to time Trc.

[0554] 9A, when the base station #1 of 301_1 transmits the wireless power transmission signal #1 of 900_1 including the other signal #1 of 901_1 and the wireless power transmission reference signal #1 of 902_1, and the base station #2 of 301_2 transmits the wireless power transmission signal #2 of 900_2 including the other signal #2 of 901_2 and the wireless power transmission reference signal #2 of 902_2, the terminal #1 of 302_1 will receive the "wireless power transmission signal #1 of 900_1 including the other signal #1 of 901_1 and the wireless power transmission reference signal #1 of 902_1" and the "wireless power transmission signal #2 of 900_2 including the other signal #2 of 901_2 and the wireless power transmission reference signal #2 of 902_2," as shown in FIG. 15D.

[0555] When base station #1 of 301_1 and base station #2 of 301_2 perform transmission timing control, and for example, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals as shown in FIG. 15C, the following conditions may be met in "fixed mode," "mobile mode," etc.

[0556] Condition 1_1x: When u is an integer between 1 and P, Ref1(u) = Ref2(u + δ) is assumed to be true for all u. Alternatively, when v is a real number between Tb and Tc, Ref1(v) = Ref2(v + δ) is assumed to be true. (Ref1(u) and Ref2(u + δ) are the same signal.) (Note that Tb < Tc is assumed to be true.)

[0557] FIG. 15E shows an example of an exchange when "terminal #1 of 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E makes a request for phase adjustment."

[0558] As shown in Figure 15E, terminal #1 of 302_1 in Figures 3A, 3B, 3C, 3D, and 3E transmits phase adjustment request information to the base station for communication because the received power has decreased (1521). Note that the method of existence of the base station for communication is as shown in Figures 3A, 3B, 3C, 3D, and 3E. Therefore, base station #1 of 301_1 and base station #2 of 301_2 may be the base station for communication. This point also applies hereinafter.

[0559] The communication base station receives the phase adjustment request information transmitted by terminal #1 of 302_1 (1541), and then transmits the phase adjustment request information to base station #1 of 301_1 and base station #2 of 301_2 (1542).

[0560] The base station #1 of 301_1 receives the phase adjustment request information (1501), and starts a phase adjustment procedure with the terminal #1 of 302_1 (1502). Note that the phase adjustment procedure has already been explained, so its explanation will be omitted.

[0561] Furthermore, the base station #2 of 301_2 receives the phase adjustment request information (1501), and the base station #2 of 301_2 starts a phase adjustment procedure with the terminal #1 of 302_1 (1502). Note that the phase adjustment procedure has already been explained, so its explanation will be omitted.

[0562] When a communication base station transmits a modulated signal for communication to a terminal, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) may be used.

[0563] However, if the method of increasing the "time frequency of exchanges for phase adjustment between base station #1 of 301_1 and terminal #1 of 302_1, and the time frequency of exchanges for phase adjustment between base station #2 of 301_2 and terminal #1 of 302_1" is adopted, the frequency of exchanges for phase adjustment will increase, which may result in a decrease in the charging efficiency of the battery of terminal #1 of 302_1.

[0564] For this reason, the following method may be adopted.

[0565] FIG. 16A shows an example of the exchange when "terminal #1 of 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits mode setting information regarding the transmission method of a wireless power transmission signal."

[0566] As shown in Figure 16A, terminal #1 of 302_1 in Figures 3A, 3B, 3C, 3D, and 3E transmits mode setting information related to Figure 7 to the base station for communication (1621). Note that the method of determining the presence of the base station for communication is as shown in Figures 3A, 3B, 3C, 3D, and 3E. Therefore, base station #1 of 301_1 and base station #2 of 301_2 may be the base station for communication. This also applies hereinafter.

[0567] The communication base station receives the mode setting information transmitted by terminal #1 of 302_1 (1641). Then, the communication base station determines the mode based on the mode setting information (1642). The communication base station transmits the determined mode information to base station #1 of 301_1 and base station #2 of 301_2 (1643).

[0568] The base station #1 of 301_1 receives the mode information transmitted by the communication base station (1601), and starts processing for transmitting a signal for wireless power transmission (1602). A specific example will be described later.

[0569] Furthermore, the base station #2 of 301_2 receives the mode information transmitted by the communication base station (1601), and starts processing for transmitting a signal for wireless power transmission (1602). A specific example will be described later.

[0570] When a communication base station transmits a modulated signal for communication to a terminal, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) may be used.

[0571] For example, in Fig. 16A, it is assumed that the base station for communication has determined the mode to be the "mobile mode" in Fig. 7 (1642). The subsequent operations will be described.

[0572] FIG. 16B shows an example of the exchange when "terminal #1 of 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits mode setting information regarding the transmission method of a wireless power transmission signal."

[0573] After the base station for communication determines the mode to be "mobile mode" in FIG. 7, it transmits mode information to base station #1 of 301_1 and base station #2 of 301_2 (1643).

[0574] The base station #1 of 301_1 receives the mode information transmitted by the communication base station (1601) and sets a phase change value (1611). The setting of the phase change value will be explained later. Then, the base station #1 of 301_1 transmits a wireless power transmission signal (1612).

[0575] Furthermore, base station #2 of 301_2 receives mode information transmitted from the communication base station (1601) and sets a phase change value (1611). The setting of the phase change value will be explained later. Then, base station #2 of 301_2 transmits a wireless power transmission signal (1612).

[0576] Terminal #1 at 302_1 receives 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, and begins charging its battery (1631).

[0577] When a communication base station transmits a modulated signal for communication to a terminal, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) may be used.

[0578] For example, the exchange in FIG. 16B when "terminal #1 at 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits mode setting information regarding the transmission method of the wireless power transmission signal" may be performed before and / or after the exchange in FIG. 15A when "base station #1 at 301_1 and base station #2 at 301_2 in FIGS. 3A, 3B, 3C, 3D, and 3E perform transmission timing adjustment for the wireless power transmission reference signal (which may be the wireless power transmission signal)."

[0579] The operations of the base station #1 of 301_1 and the base station #2 of 301_2 will be described with reference to FIG.

[0580] The signal generating unit 1101 receives the control signal 1100 as input, generates a signal indicated by the control signal 1100 , and outputs a signal 1102 for wireless power transmission.

[0581] For example, when the control signal 1100 indicates "transmitting other signals," the signal generating unit 1101 outputs a signal for wireless power transmission 1102 corresponding to the other signals.

[0582] Furthermore, when the control signal 1100 indicates that a wireless power transmission reference signal is to be transmitted, the signal generating unit 1101 outputs a wireless power transmission signal 1102 that corresponds to the wireless power transmission reference signal.

[0583] The phase change unit 1103 receives the wireless power transmission signal 1102 and the control signal 1100 as input, and when the control signal 1100 indicates that a phase change is to be performed, changes the phase of the wireless power transmission signal 1102 and outputs a signal 1104. When the control signal 1100 indicates that a phase change is not to be performed, the phase change unit 1103 does not change the phase of the wireless power transmission signal 1102 and outputs a signal 1104.

[0584] The power transmitting antenna unit 1105 receives the signal 1104 and the control signal 1100 as input, performs control in accordance with the instructions of the control signal 1100, and outputs the signal 1104 as a radio wave.

[0585] 11 is merely an example, and the present invention is not limited to this configuration. For example, the signal generating unit 1101 and the phase changing unit 1103 may be integrated into one processing unit.

[0586] Assume that base station #1 301_1 in Figures 3A, 3B, 3C, 3D, and 3E generates reference signal #1 for wireless power transmission 902_1 as shown in Figure 9B1 or 9B2. In this case, reference signal #1 for wireless power transmission 902_1 at time t is represented as Ref1(t). Note that Ref1(t) is represented by a complex number.

[0587] Also, assume that base station #2 301_2 in Figures 3A, 3B, 3C, 3D, and 3E generates reference signal #2 for wireless power transmission 902_2 as shown in Figure 9B1 or 9B2. In this case, reference signal #2 for wireless power transmission 902_2 at time t is represented as Ref2(t). Note that Ref2(t) is represented by a complex number.

[0588] Condition 1_2: Then, when u is an integer between 1 and P, Ref1(u) = Ref2(u) is assumed to be true for all u. Alternatively, when v is a real number between Tb and Tc, Ref1(v) = Ref2(v) is assumed to be true. (Ref1(u) and Ref2(u) are the same signal.)

[0589] In base station #1 of 301_1 having the configuration of Fig. 11, signal generation section 1101 generates and outputs Ref1(t). Phase change section 1103 receives Ref1(t) as input and outputs a signal obtained by performing a phase change on Ref1(t), and base station #1 of 301_1 transmits a signal equivalent to the signal obtained by performing a phase change on Ref1(t).

[0590] 11, signal generation section 1101 generates and outputs Ref2(t). Phase change section 1103 receives Ref2(t) as input and outputs a signal obtained by changing the phase of Ref2(t), and base station #2 of 301_2 transmits a signal equivalent to the signal obtained by changing the phase of Ref2(t).

[0591] An example of a base station #1 301_1 having the configuration of FIG. 11 including the above example and a base station #2 301_2 having the configuration of FIG. 11 will be described.

[0592] Example 1-1: Base station #1 of 301_1 having the configuration of Fig. 11 does not change the phase, and therefore, base station #1 of 301_1 having the configuration of Fig. 11 transmits a signal equivalent to Ref1(t).

[0593] Then, the base station #2 of 301_2 having the configuration of FIG. 11 performs a phase change and transmits a signal equivalent to the phase-changed signal for Ref2(t).

[0594] Example 1-2: Base station #2 of 301_2 having the configuration of Fig. 11 does not change the phase, and therefore, base station #2 of 301_2 having the configuration of Fig. 11 transmits a signal equivalent to Ref2(t).

[0595] Then, the base station #1 of 301_1 having the configuration of FIG. 11 performs a phase change and transmits a signal equivalent to the phase-changed signal for Ref1(t).

[0596] Example 1-3: The base station #1 of 301_1 having the configuration of FIG. 11 performs a phase change and transmits a signal equivalent to the signal for which the phase change has been performed on Ref1(t).

[0597] Then, the base station #2 of 301_2 having the configuration of FIG. 11 performs a phase change and transmits a signal equivalent to the phase-changed signal for Ref2(t).

[0598] In Example 1-1, "the base station #1 of 301_1 having the configuration of Fig. 11 transmits a signal equivalent to Ref1(t)." This point will be explained below.

[0599] For example, suppose that base station #1 of 301_1 generates reference signal #1 for wireless power transmission of 902_1 as shown in Fig. 9B1 or 9B2, that is, generates Ref1(k) at time k (for example, k is an integer equal to or greater than 1). Then, no phase change is performed in phase change section 1103 of Fig. 11, and therefore base station #1 of 301_1 transmits a "signal equivalent to Ref1(k)".

[0600] In Example 1-1, "base station #2 of 301_2 having the configuration of Fig. 11 performs a phase change and transmits a signal equivalent to the phase-changed signal for Ref2(t)." An example of the phase change at this time will be described.

[0601] For example, it is assumed that the base station #2 of 301_2 generates a wireless power transmission reference signal #2 of 902_2 as shown in FIG. 9B1 or 9B2, that is, generates Ref2(k) at time k (for example, k is an integer equal to or greater than 1). ｊλ２（ｋ） Therefore, the base station #2 of 301_2 receives a signal equivalent to a signal in which a phase change is made to Ref2(t), that is, ｊλ２（ｋ） × a signal equivalent to Ref2(k) will be transmitted.

[0602] One suitable example is λ2(k) = (2 x π x k) / N (radians) (N is an integer equal to or greater than 2). Another suitable example is λ2(k+1) - λ2(k) = β (radians) (where β is a real number other than 0). Yet another suitable example is "the value of λ2(k) may be set randomly according to k," or "the value of λ2(k) may be switched periodically according to k."

[0603] In FIG. 11, the signal generating section 1101 and the phase changing section 1103 may be integrated into one processing section.

[0604] In Example 1-2, "the base station #2 of 301_2 having the configuration of Fig. 11 transmits a signal equivalent to Ref2(t)." This point will be explained below.

[0605] For example, suppose that base station #2 of 301_2 generates reference signal #2 for wireless power transmission of 902_2 as shown in Fig. 9B1 or 9B2, that is, generates Ref2(k) at time k (for example, k is an integer equal to or greater than 1). Then, no phase change is performed in phase change section 1103 of Fig. 11, and therefore base station #2 of 301_2 transmits a "signal equivalent to Ref2(k)".

[0606] In Example 1-2, "the base station #1 of 301_1 having the configuration of Fig. 11 performs a phase change and transmits a signal equivalent to the signal obtained by performing the phase change on Ref1(t)." An example of the phase change at this time will be described.

[0607] For example, it is assumed that the base station #1 of 301_1 generates a wireless power transmission reference signal #1 of 902_1 as shown in FIG. 9B1 or 9B2, that is, generates Ref1(k) at time k (for example, k is an integer equal to or greater than 1). Then, in the phase change unit 1103 of FIG. 11, e ｊλ１（ｋ） Therefore, the base station #1 of 301_1 receives a signal equivalent to a signal in which the phase of Ref1(t) is changed, that is, ｊλ１（ｋ） × a signal equivalent to Ref1(k) will be transmitted.

[0608] One suitable example is λ1(k) = (2 x π x k) / M (radians) (M is an integer equal to or greater than 2). Another suitable example is λ1(k+1) - λ1(k) = α (radians) (where α is a real number other than 0). Yet another suitable example is "the value of λ1(k) may be set randomly according to k," or "the value of λ1(k) may be periodically switched according to k."

[0609] In FIG. 11, the signal generating section 1101 and the phase changing section 1103 may be integrated into one processing section.

[0610] In Example 1-3, "the base station #1 of 301_1 having the configuration of Fig. 11 performs a phase change and transmits a signal equivalent to the signal obtained by performing the phase change on Ref1(t)." An example of the phase change at this time will be described.

[0611] For example, it is assumed that the base station #1 of 301_1 generates a wireless power transmission reference signal #1 of 902_1 as shown in FIG. 9B1 or 9B2, that is, generates Ref1(k) at time k (for example, k is an integer equal to or greater than 1). Then, in the phase change unit 1103 of FIG. 11, e ｊλ１（ｋ） Therefore, the base station #1 of 301_1 receives a signal equivalent to a signal in which the phase of Ref1(t) is changed, that is, ｊλ１（ｋ） × a signal equivalent to Ref1(k) will be transmitted.

[0612] One suitable example is λ1(k) = (2 x π x k) / M (radians) (M is an integer equal to or greater than 2). Another suitable example is λ1(k+1) - λ1(k) = α (radians) (where α is a real number other than 0). Yet another suitable example is "the value of λ1(k) may be set randomly according to k," or "the value of λ1(k) may be periodically switched according to k."

[0613] In FIG. 11, the signal generating section 1101 and the phase changing section 1103 may be integrated into one processing section.

[0614] In Example 1-3, "base station #2 of 301_2 having the configuration of Fig. 11 performs a phase change and transmits a signal equivalent to the phase-changed signal for Ref2(t)." An example of the phase change at this time will be described.

[0615] For example, it is assumed that the base station #2 of 301_2 generates a wireless power transmission reference signal #2 of 902_2 as shown in FIG. 9B1 or 9B2, that is, generates Ref2(k) at time k (for example, k is an integer equal to or greater than 1). ｊλ２（ｋ）Therefore, the base station #2 of 301_2 receives a signal equivalent to a signal in which a phase change is made to Ref2(t), that is, ｊλ２（ｋ） × a signal equivalent to Ref2(k) will be transmitted.

[0616] One suitable example is λ2(k) = (2 x π x k) / N (radians) (N is an integer equal to or greater than 2). Another suitable example is λ2(k+1) - λ2(k) = β (radians) (where β is a real number other than 0). Yet another suitable example is "the value of λ2(k) may be set randomly according to k," or "the value of λ2(k) may be switched periodically according to k."

[0617] In FIG. 11, the signal generating section 1101 and the phase changing section 1103 may be integrated into one processing section.

[0618] The received power of terminal #1 of 302_1 when a wireless power transmission signal is transmitted as in Examples 1-1, 1-2, and 1-3 will be described.

[0619] 17 shows an example of the received power of terminal #1 of 302_1 when base station #1 of 301_1 transmits wireless power transmission reference signal #1 of 902_1 and base station #2 of 301_2 transmits wireless power transmission reference signal #2. In FIG. 17, the same numbers are used for components that operate in the same way as in FIG. 14, and components that have already been described will not be described again.

[0620] 1700 shows an example of the received power of terminal #1 of 302_1 when "base station #1 of 301_1" and "base station #2 of 301_2" transmit wireless power transmission signals as in Examples 1-1, 1-2, and 1-3.

[0621] Compared to the received power pattern 1499 of terminal #1 of 302_1 in Fig. 17, the received power pattern 1700 of terminal #1 of 302_1 fluctuates more quickly. This is due to the phase change operation of phase change unit 1103 of base station #1 of 301_1 in Fig. 11 and / or phase change unit 1103 of base station #2 of 301_2 in Fig. 11. As a result, compared to the received power pattern 1499 of terminal #1 of 302_1, the received power pattern 1700 of terminal #1 of 302_1 fluctuates more quickly, which provides the effect of reducing the impact on the charging of terminal #1 of 302_1.

[0622] Instead of phase modification, CSD (Cyclic Shift Diversity) or CDD (Cyclic Delay Diversity) processing may be performed.

[0623] In the phase change unit 1103 of the base station #2 of 301_2 in Example 1-1 shown in FIG. 11, CSD and CDD processing may be performed instead of phase change.

[0624] In the phase change unit 1103 of the base station #1 of 301_1 in Example 1-2 shown in FIG. 11, CSD and CDD processing may be performed instead of phase change.

[0625] In the phase change unit 1103 of the base station #1 of 301_1 in Example 1-3 shown in FIG. 11, CSD and CDD processing may be performed instead of phase change.

[0626] In the phase change unit 1103 of the base station #2 of 301_2 in Example 1-3 shown in FIG. 11, CSD and CDD processing may be performed instead of phase change.

[0627] 16A, the base station for communication may perform mode determination (1642) corresponding to the "fixed mode" in Fig. 7. In this case, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals to terminal 302_1 by "a method in which multiple base stations transmit wireless power transmission reference signals that have been phase-adjusted, and generate a state close to in-phase synthesis." This point has already been explained.

[0628] Also, when terminal #1 of 302_1 is in the "automatic switching mode" of FIG. 7, in FIG. 16A, the base station for communication may determine in mode decision 1642 whether to use a mode corresponding to the "fixed mode" of FIG. 7 or a mode corresponding to the "mobile mode."

[0629] Regarding the above, the operations of the base station #1 of 301_1 and the base station #2 of 301_2 will be described using FIG. 15B, which is different from FIG.

[0630] The signal generating unit 1101 receives the control signal 1100 as input, generates a signal indicated by the control signal 1100 , and outputs a signal 1598 for wireless power transmission.

[0631] For example, when the control signal 1100 indicates "transmit other signals," the signal generating unit 1101 outputs a signal for wireless power transmission 1598 that corresponds to the other signals.

[0632] Furthermore, when the control signal 1100 indicates that a wireless power transmission reference signal is to be transmitted, the signal generating unit 1101 outputs a wireless power transmission signal 1598 that corresponds to the wireless power transmission reference signal.

[0633] The timing adjustment unit 1599 receives the wireless power transmission signal 1598 and the control signal 1100, performs timing control based on the information on the "timing adjustment value" included in the control signal 1100, and outputs the wireless power transmission signal 1102 after adjusting the transmission timing. Note that the method by which the base station #1 of 301_1 and the base station #2 of 301_2 obtain the information on the "timing adjustment value" has already been explained, and therefore will not be explained again.

[0634] The phase change unit 1103 receives the signal for wireless power transmission 1102 after the adjusted transmission timing and the control signal 1100, and when the control signal 1100 indicates that a phase change is to be performed, performs a phase change on the signal for wireless power transmission 1102 after the adjusted transmission timing and outputs a signal 1104. When the control signal 1100 indicates that a phase change is not to be performed, the phase change unit 1103 does not perform a phase change on the signal for wireless power transmission 1102 after the adjusted transmission timing and outputs a signal 1104.

[0635] The power transmitting antenna unit 1105 receives the signal 1104 and the control signal 1100 as input, performs control in accordance with the instructions of the control signal 1100, and outputs the signal 1104 as a radio wave.

[0636] 15B is merely an example, and the present invention is not limited to this configuration. For example, the timing adjustment unit 1599 may be inserted after the phase adjustment unit (phase change unit) 1103, or may be inserted at another position.

[0637] Assume that base station #1 301_1 in Figures 3A, 3B, 3C, 3D, and 3E generates reference signal #1 for wireless power transmission 902_1 as shown in Figure 15C based on Figure 9B1 or 9B2. In this case, reference signal #1 for wireless power transmission 902_1 at time t is represented as Ref1(t). Note that Ref1(t) is represented by a complex number.

[0638] Also, assume that base station #2 301_2 in Figures 3A, 3B, 3C, 3D, and 3E generates reference signal #2 for wireless power transmission 902_2 as shown in Figure 15C based on Figure 9B1 or 9B2. In this case, reference signal #2 for wireless power transmission 902_2 at time t is represented as Ref2(t). Note that Ref2(t) is represented by a complex number.

[0639] Condition 1_2x: Then, when u is an integer between 1 and P, Ref1(u) = Ref2(u + δ) is assumed to be true for all u. Alternatively, when v is a real number between Tb and Tc, Ref1(v) = Ref2(v + δ) is assumed to be true. (Ref1(u) and Ref2(u + δ) are the same signal.)

[0640] 15B , the signal generating unit 1101 generates and outputs the signal for wireless power transmission #1 of 900_1. After the timing adjusting unit 1599 performs timing adjustment, the phase changing unit 1103 receives the signal for wireless power transmission #1 of 900_1 and outputs a signal obtained by changing the phase of the signal for wireless power transmission #1 of 900_1. The base station #1 of 301_1 transmits a signal equivalent to the signal obtained by changing the phase of the signal for wireless power transmission #1 of 900_1.

[0641] 15B , the signal generating unit 1101 generates and outputs the signal for wireless power transmission #2 of 900_2. After the timing adjusting unit 1599 performs timing adjustment, the phase changing unit 1103 receives the signal for wireless power transmission #2 of 900_2 and outputs a signal obtained by changing the phase of the signal for wireless power transmission #2 of 900_2. The base station #2 of 301_2 transmits a signal equivalent to the signal obtained by changing the phase of the signal for wireless power transmission #2 of 900_2.

[0642] An example of a base station #1 301_1 having the configuration of FIG. 15B including the above example and a base station #2 301_2 having the configuration of FIG. 15B will be described.

[0643] Example 1-1x: The base station #1 of the 301_1 having the configuration of Fig. 15B does not change the phase, and therefore the base station #1 of the 301_1 having the configuration of Fig. 15B transmits a signal equivalent to Ref1(t).

[0644] Then, the base station #2 of 301_2 having the configuration of FIG. 15B performs a phase change and transmits a signal equivalent to the signal for which the phase change has been performed on Ref2(t).

[0645] Example 1-2x: The base station #2 of 301_2 having the configuration of Fig. 15B does not change the phase, and therefore the base station #2 of 301_2 having the configuration of Fig. 15B transmits a signal equivalent to Ref2(t).

[0646] Then, the base station #1 of 301_1 having the configuration of FIG. 15B performs a phase change and transmits a signal equivalent to the signal for which the phase change has been performed on Ref1(t).

[0647] Example 1-3x: The base station #1 of 301_1 having the configuration of FIG. 15B performs a phase change and transmits a signal equivalent to the signal that has undergone the phase change for Ref1(t).

[0648] Then, the base station #2 of 301_2 having the configuration of FIG. 15B performs a phase change and transmits a signal equivalent to the signal for which the phase change has been performed on Ref2(t).

[0649] In Example 1-1x, "the base station #1 of 301_1 having the configuration of Fig. 15B transmits a signal equivalent to Ref1(t)." This point will be explained below.

[0650] For example, suppose that base station #1 of 301_1 generates reference signal #1 for wireless power transmission of 902_1 as shown in Fig. 15C based on Fig. 9B1 or 9B2, that is, generates Ref1(k) at time k (for example, k is an integer equal to or greater than 1). Then, phase change section 1103 of Fig. 15B does not change the phase, and therefore base station #1 of 301_1 transmits a "signal equivalent to Ref1(k)".

[0651] In Example 1-1x, "base station #2 of 301_2 having the configuration of Fig. 15B performs a phase change and transmits a signal equivalent to the signal for which the phase change has been performed on Ref2(t)." An example of the phase change at this time will be described.

[0652] For example, the base station #2 of 301_2 generates a wireless power transmission reference signal #2 of 902_2 as shown in FIG. 15C based on FIG. 9B1 or 9B2, that is, generates Ref2(k) at time k (for example, k is an integer equal to or greater than 1). ｊλ２（ｋ） Therefore, the base station #2 of 301_2 receives a signal equivalent to a signal in which a phase change is made to Ref2(t), that is, ｊλ２（ｋ）× a signal equivalent to Ref2(k) will be transmitted.

[0653] One suitable example is λ2(k) = (2 x π x k) / N (radians) (N is an integer equal to or greater than 2). Another suitable example is λ2(k+1) - λ2(k) = β (radians) (where β is a real number other than 0). Yet another suitable example is "the value of λ2(k) may be set randomly according to k," or "the value of λ2(k) may be switched periodically according to k."

[0654] 15B and the base station #2 301_2 having the configuration of FIG. 15B may perform transmission timing control by the timing adjustment unit 1599. In the base station #2 301_2 having the configuration of FIG.

[0655] In Example 1-2x, "the base station #2 of 301_2 having the configuration of Fig. 15B transmits a signal equivalent to Ref2(t)." This point will be explained below.

[0656] For example, suppose that base station #2 of 301_2 generates reference signal #2 for wireless power transmission of 902_2 as shown in Fig. 15C based on Fig. 9B1 or 9B2, that is, generates Ref2(k) at time k (for example, k is an integer equal to or greater than 1). Then, phase change section 1103 of Fig. 15B does not change the phase, and therefore base station #2 of 301_2 transmits a "signal equivalent to Ref2(k)".

[0657] In Example 1-2x, "base station #1 of 301_1 having the configuration of Fig. 15B performs a phase change and transmits a signal equivalent to the signal obtained by performing the phase change on Ref1(t)." An example of the phase change at this time will be described.

[0658] For example, the base station #1 of 301_1 generates a wireless power transmission reference signal #1 of 902_1 as shown in FIG. 15C based on FIG. 9B1 or 9B2, that is, generates Ref1(k) at time k (for example, k is an integer equal to or greater than 1). ｊλ１（ｋ）Therefore, the base station #1 of 301_1 receives a signal equivalent to a signal in which the phase of Ref1(t) is changed, that is, ｊλ１（ｋ） × a signal equivalent to Ref1(k) will be transmitted.

[0659] One suitable example is λ1(k) = (2 x π x k) / M (radians) (M is an integer equal to or greater than 2). Another suitable example is λ1(k+1) - λ1(k) = α (radians) (where α is a real number other than 0). Yet another suitable example is "the value of λ1(k) may be set randomly according to k," or "the value of λ1(k) may be periodically switched according to k."

[0660] 15B and the base station #2 301_2 having the configuration of FIG. 15B may perform transmission timing control by the timing adjustment unit 1599. In the base station #2 301_2 having the configuration of FIG.

[0661] In Example 1-3x, "the base station #1 of 301_1 having the configuration of Fig. 15B performs a phase change and transmits a signal equivalent to the signal obtained by performing the phase change on Ref1(t)." An example of the phase change at this time will be described.

[0662] For example, the base station #1 of 301_1 generates a wireless power transmission reference signal #1 of 902_1 as shown in FIG. 15C based on FIG. 9B1 or 9B2, that is, generates Ref1(k) at time k (for example, k is an integer equal to or greater than 1). ｊλ１（ｋ） Therefore, the base station #1 of 301_1 receives a signal equivalent to a signal in which the phase of Ref1(t) is changed, that is, ｊλ１（ｋ） × a signal equivalent to Ref1(k) will be transmitted.

[0663] One suitable example is λ1(k) = (2 x π x k) / M (radians) (M is an integer equal to or greater than 2). Another suitable example is λ1(k+1) - λ1(k) = α (radians) (where α is a real number other than 0). Yet another suitable example is "the value of λ1(k) may be set randomly according to k," or "the value of λ1(k) may be periodically switched according to k."

[0664] In Example 1-3x, "base station #2 of 301_2 having the configuration of Fig. 15B performs a phase change and transmits a signal equivalent to the phase-changed signal for Ref2(t)." An example of the phase change at this time will be described.

[0665] For example, the base station #2 of 301_2 generates a wireless power transmission reference signal #2 of 902_2 as shown in FIG. 15C based on FIG. 9B1 or 9B2, that is, generates Ref2(k) at time k (for example, k is an integer equal to or greater than 1). ｊλ２（ｋ） Therefore, the base station #2 of 301_2 receives a signal equivalent to a signal in which a phase change is made to Ref2(t), that is, ｊλ２（ｋ） × a signal equivalent to Ref2(k) will be transmitted.

[0666] One suitable example is λ2(k) = (2 x π x k) / N (radians) (N is an integer equal to or greater than 2). Another suitable example is λ2(k+1) - λ2(k) = β (radians) (where β is a real number other than 0). Yet another suitable example is "the value of λ2(k) may be set randomly according to k," or "the value of λ2(k) may be switched periodically according to k."

[0667] 15B and the base station #2 301_2 having the configuration of FIG. 15B may perform transmission timing control by the timing adjustment unit 1599. In the base station #2 301_2 having the configuration of FIG.

[0668] The received power of terminal #1 of 302_1 when a wireless power transmission signal is transmitted as in Example 1-1x, Example 1-2x, and Example 1-3x will be described.

[0669] 17 shows an example of the received power of terminal #1 of 302_1 when base station #1 of 301_1 transmits wireless power transmission reference signal #1 of 902_1 and base station #2 of 301_2 transmits wireless power transmission reference signal #2. In FIG. 17, the same numbers are used for components that operate in the same way as in FIG. 14, and components that have already been described will not be described again.

[0670] 1700 shows an example of the received power of terminal #1 of 302_1 when "base station #1 of 301_1" and "base station #2 of 301_2" transmit wireless power transmission signals as in Examples 1-1x, 1-2x, and 1-3x.

[0671] Compared to the received power pattern 1499 of terminal #1 of 302_1 in Fig. 17, the received power pattern 1700 of terminal #1 of 302_1 fluctuates more quickly. This is due to the phase change operation of phase change unit 1103 of base station #1 of 301_1 in Fig. 15B and / or phase change unit 1103 of base station #2 of 301_2 in Fig. 15B. As a result, compared to the received power pattern 1499 of terminal #1 of 302_1, the received power pattern 1700 of terminal #1 of 302_1 fluctuates more quickly, which provides the effect of reducing the impact on the charging of terminal #1 of 302_1.

[0672] Instead of phase modification, CSD (Cyclic Shift Diversity) or CDD (Cyclic Delay Diversity) processing may be performed.

[0673] In the phase change section 1103 of the base station #2 of 301_2 in Example 1-1x shown in FIG. 15B, CSD and CDD processing may be performed instead of phase change.

[0674] In the phase change unit 1103 of the base station #1 of 301_1 in Example 1-2x shown in FIG. 15B, CSD and CDD processing may be performed instead of phase change.

[0675] In the phase change unit 1103 of the base station #1 of 301_1 in Example 1-3x shown in FIG. 15B, CSD and CDD processing may be performed instead of phase change.

[0676] In the phase change unit 1103 of the base station #2 of 301_2 in Example 1-3x shown in FIG. 15B, CSD and CDD processing may be performed instead of phase change.

[0677] 16A, the base station for communication may perform mode determination (1642) corresponding to the "fixed mode" in Fig. 7. In this case, base station #1 of 301_1 and base station #2 of 301_2 transmit wireless power transmission signals to terminal 302_1 by "a method in which multiple base stations transmit wireless power transmission reference signals that have been phase-adjusted, and generate a state close to in-phase synthesis." This point has already been explained.

[0678] Also, when terminal #1 of 302_1 is in the "automatic switching mode" of FIG. 7, in FIG. 16A, the base station for communication may determine in mode decision 1642 whether to use a mode corresponding to the "fixed mode" of FIG. 7 or a mode corresponding to the "mobile mode."

[0679] Fig. 18 shows an example of a screen displayed on terminal #1 of 302_1. For example, when terminal #1 of 302_1 can display on screen 1800, it is possible to set any one of "fixed mode," "mobile mode," "parallel charging mode," "charging spot mode," and "normal charging mode," as shown in Fig. 18.

[0680] 18, the modes are referred to as "fixed mode," "mobile mode," "parallel charging mode," "charging spot mode," and "normal charging mode," but the names are not limited to these and may be referred to as "first mode, second mode, ...," "first method, second method, ...." Furthermore, the terminal and the base station may use the same names or different names.

[0681] The "fixed mode" and "mobile mode" are the same as those in FIG. 7, and the operations of base station #1 of 301_1, base station #2 of 301_2, and terminal #1 of 302_1 have already been explained, so explanations will be omitted.

[0682] The following describes the operations of the base station #1 of 301_1, the base station #2 of 301_2, and the terminal #1 of 302_1 in the "parallel charging mode," "charging spot mode," and "normal charging mode."

[0683] The "parallel charging mode" will now be described.

[0684] An example of the relationship between "base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E, and terminal #1 of 302_1 that receives a signal for power transmission transmitted by the "device for power transmission and / or communication" and charges the battery" is shown in Figure 19A.

[0685] The base station #1 of 301_1 transmits power wirelessly to the terminal #1 of 302_1, and the base station #2 of 301_2 transmits power wirelessly to the terminal #1 of 302_1.

[0686] 19A, 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.

[0687] FIG. 19B shows an example of the configuration of terminal #1 of 302_1 in FIG. 19A.

[0688] Interface unit 1900B receives signal 1901B as input and outputs signal 1902B. Interface unit 1900B is also connected to multiple components such as "charging function unit 1 of 1911B_1, ..., charging function unit U of 1911B_U," communication function unit 1921B, and control unit 1990B. U is an integer equal to or greater than 2, and terminal #1 of 302_1 is equipped with multiple charging function units.

[0689] Then, "charging unit 1 of 1911B_1, ..., charging unit U of 1911B_U," communication function unit 1921B, and control unit 1990B exchange data with each part via interface unit 1200B.

[0690] The charging function unit i of 1911B_i is connected to the antenna unit i of 1912B_i, and for example, the charging function unit i of 1911B_i inputs a signal received by the antenna unit i of 1912B_i to charge the battery, where i is an integer between 1 and U.

[0691] The feature of Fig. 19B is that "terminal #1 of 302_1 in Fig. 19A can operate a plurality of charging function units among charging function units i of 1911B_i." Each charging function unit may be equipped with a battery, and terminal #1 of 302_1 may be equipped with one or two or more batteries.

[0692] Fig. 19C shows an example of the configuration of terminal #1 of 302_1 in Fig. 19A that is different from Fig. 19B. Note that in Fig. 19C, the same elements as those in Fig. 19B are given the same numbers, and as they have already been explained, some explanations will be omitted.

[0693] The interface unit 1900B receives a signal 1901B as an input and outputs a signal 1902B. The interface unit 1900B is also connected to a plurality of parts such as the charging function unit 1911B_1, the communication function unit 1921B, and the control unit 1990B.

[0694] The "charging function unit 1 of 1911B_1, communication function unit 1921B, and control unit 1990B" exchange data with each unit via the interface unit 1900B.

[0695] The charging function unit 1 of 1911B_1 is connected to "antenna unit 1_1 of 1913C_1_1, ..., antenna unit 1_V1 of 1913C_1_V1," and for example, the charging function unit 1 of 1911B_1 inputs signals received by multiple antenna units among "antenna unit 1_1 of 1913C_1_1, ..., antenna unit 1_V1 of 1913C_1_V1," and charges the battery. Note that V1 is an integer of 2 or greater.

[0696] The feature of Fig. 19C is that "terminal #1 of 302_1 in Fig. 19A can operate multiple antenna units among "antenna unit 1_1 of 1913C_1_1, ..., antenna unit 1_V1 of 1913C_1_V1" and charge the battery." Note that terminal #1 of 302_1 may be equipped with one or two or more batteries.

[0697] Fig. 19D shows an example of the configuration of terminal #1 of 302_1 in Fig. 19A that is different from Fig. 19B and Fig. 19C. Note that in Fig. 19D, the same elements as those in Fig. 19B are given the same numbers, and as they have already been explained, some explanations will be omitted.

[0698] Interface unit 1900B receives signal 1901B as input and outputs signal 1902B. Interface unit 1900B is also connected to multiple components such as "charging function unit 1 of 1911B_1, ..., charging function unit U of 1911B_U," communication function unit 1921B, and control unit 1990B. U is an integer equal to or greater than 2, and terminal #1 of 302_1 is equipped with multiple charging function units.

[0699] Then, "charging unit 1 of 1911B_1, ..., charging unit U of 1211B_U," communication function unit 1921B, and control unit 1990B exchange data with each part via interface unit 1900B.

[0700] The charging function unit k of 1911B_k is connected to "antenna unit k_1 of 1913D_k_1, ..., antenna unit k_Vk of 1913D_k_Vk," and for example, the charging function unit k of 1911B_k inputs signals received by multiple antenna units among "antenna unit k_1 of 1913D_k_1, ..., antenna unit k_Vk of 1913D_k_Vk," and charges the battery. Note that Vk is an integer of 2 or more, and k is an integer of 1 or more and U or less.

[0701] The features of Fig. 19D are that "terminal #1 of 302_1 in Fig. 19A can operate multiple charging function units among charging function units k of 1911B_k" and "terminal #1 of 302_1 in Fig. 12A can operate multiple antenna units among "antenna unit k_1 of 1913D_k_1, ..., antenna unit k_Vk of 1913D_k_Vk" and charge the battery." Note that each charging function unit may be equipped with a battery, and terminal #1 of 302_1 may be equipped with one or two or more batteries.

[0702] The configuration of terminal #1 of 302_1 in Fig. 19A has been described using Fig. 19B, Fig. 19C, and Fig. 19D. The following description will mainly focus on the operations of base station #1 of 301_1 and base station #2 of 301_2 in Fig. 19A.

[0703] Fig. 20A1 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20A1, the horizontal axis represents time and the vertical axis represents frequency.

[0704] Fig. 20A2 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20A2, the horizontal axis represents time and the vertical axis represents frequency.

[0705] 20A1 and 20A2, "a wireless power transmission signal 2001A_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and "a wireless power transmission signal 2001A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exist at the frequency AA1 and the time A1. In other words, "a wireless power transmission signal 2001A_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and "a wireless power transmission signal 2001A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exist at the same (common) frequency and the same (common) time.

[0706] 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."

[0707] 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.

[0708] Although the method is called "(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.

[0709] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20A1 and 20A2.

[0710] Another example of the "(Downlink) SDM method for wireless power transmission signals" will now be described.

[0711] Fig. 20A3 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20A3, the horizontal axis represents time and the vertical axis represents frequency.

[0712] Fig. 20A4 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20A4, the horizontal axis represents time and the vertical axis represents frequency.

[0713] 20A3 and 20A4, "a wireless power transmission signal 2001A_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and "a wireless power transmission signal 2001A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exist at the frequency AA1 and the time A1. Note that "a wireless power transmission signal 2001A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" also exists at times other than the time A1.

[0714] In other words, "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at the same (common) frequency and the same (common) time.

[0715] 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."

[0716] 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.

[0717] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20A3 and 20A4.

[0718] Fig. 20A5 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20A5, the horizontal axis represents time and the vertical axis represents frequency.

[0719] Fig. 20A6 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20A6, the horizontal axis represents time and the vertical axis represents frequency.

[0720] 20A5 and 20A6, "a wireless power transmission signal 2001A_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and "a wireless power transmission signal 2001A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" are present at the frequency AA1 and the time A1. Note that "a wireless power transmission signal 2001A_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" are also present at times other than the time A1.

[0721] In other words, "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at the same (common) frequency and the same (common) time.

[0722] 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."

[0723] 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.

[0724] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20A5 and 20A6.

[0725] Fig. 20A7 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20A7, the horizontal axis represents time and the vertical axis represents frequency.

[0726] Fig. 20A8 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20A8, the horizontal axis represents time and the vertical axis represents frequency.

[0727] 20A7 and 20A8, "a wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "a wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at frequency AA1 and time A1. Note that "a wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" also exists at times other than time A1. Furthermore, "a wireless power transmission signal 2001A_2 transmitted by base station #1 of 301_1 and addressed to terminal #2 of 302_2" also exists at frequencies other than AA1.

[0728] In other words, "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at the same (common) frequency and the same (common) time.

[0729] 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."

[0730] 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.

[0731] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20A7 and 20A8.

[0732] Fig. 20A9 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20A9, the horizontal axis represents time and the vertical axis represents frequency.

[0733] Fig. 20A10 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20A10, the horizontal axis represents time and the vertical axis represents frequency.

[0734] 20A9 and 20A10, "a wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "a wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at frequency AA1 and time A1. Note that "a wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" also exists at times other than time A1. Furthermore, "a wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" also exists at frequencies other than AA1.

[0735] In other words, "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at the same (common) frequency and the same (common) time.

[0736] 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."

[0737] 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.

[0738] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001A_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001A_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20A9 and 20A10.

[0739] The arrangement of the "signal for wireless power transmission 2001A_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and the "signal for wireless power transmission 2001A_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" on the time axis and the frequency axis is shown in "Figs. 20A1, 20A2", "Figs. 20A3, 20A4", "Figs. 20A5, 20A6", "Figs. 20A7, 20A8", "Figs. 20A9, 20B10", "Figs. 20B11, 20B12", "Figs. 20B13, 20B14", "Figs. 20B15, 20B16", "Figs. 20B17, 20B18", "Figs. 20B19, 20B20", "Figs. 20B21, 20B22", "Figs. 20B23, 20B24", "Figs. 20B25, 20B26", "Figs. 20B27, 20B28", "Figs. 20B29, 20B30", "Fig. 20B31, 20B32", "Fig. 20B33, 20B34", "Fig. 20B35, 20B36", "Fig. 20B37, 20B38", "Fig. 20B39, 20B41", "Fig. 20B42, 20B43", "Fig. 20B44, 20B45", "Fig. 20B46, 20B47", "Fig. 20B48, 20 The present invention is not limited to the example of "signal 2001A_1 for wireless power transmission addressed to terminal #1 of 302_1 transmitted by base station #1 of 301_1" and "signal 2001A_2 for wireless power transmission addressed to terminal #1 of 302_1 transmitted by base station #2 of 301_2" and "signal 2001A_1 for wireless power transmission addressed to terminal #1 of 302_1 transmitted by base station #1 of 301_1" are present at the same (common) frequency and the same (common) time, and can be implemented in the same way regardless of the arrangement.

[0740] Also, in Figure 19A, for example, two base stations or two TRPs transmit signals for wireless power transmission using the SDM method, and terminal #1 of 302_1 obtains signals for wireless power transmission from the 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 #1 of 302_1 may obtain signals for wireless power transmission from two or more base stations or two or more TRPs.

[0741] By implementing the above, the terminal can be charged efficiently, and the configurations of Figures 19B, 19C, and 19D have the effect of allowing the terminal to perform multiple charges.

[0742] Fig. 20B1 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20B1, the horizontal axis represents time and the vertical axis represents frequency.

[0743] Fig. 20B2 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20B2, the horizontal axis represents time and the vertical axis represents frequency.

[0744] As shown in FIG. 20B1, "a wireless power transmission signal 2001B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" exists at the frequency BB1 and the time B1.

[0745] As shown in FIG. 20B2, "a wireless power transmission signal 2001B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exists at the frequency BB1 and the time B2.

[0746] In other words, "wireless power transmission signal 2001B_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2001B_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at the same (common) frequency but at different times.

[0747] 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."

[0748] If the base station is a TRP, it is specifically implementing a (downlink) TDM method for signals for wireless power transmission by multiple TRPs.

[0749] 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.

[0750] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001B_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001B_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20B1 and 20B2.

[0751] Another example of the "(Downlink) TDM method for wireless power transmission signals" will now be described.

[0752] Fig. 20B3 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20B3, the horizontal axis represents time and the vertical axis represents frequency.

[0753] Fig. 20B4 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20B4, the horizontal axis represents time and the vertical axis represents frequency.

[0754] As shown in FIG. 20B3, "a wireless power transmission signal 2001B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" exists at the frequency BB1 and the time B1.

[0755] As shown in FIG. 20B4, "a wireless power transmission signal 2001B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exists at the frequency BB1 and the time B2.

[0756] It should be noted that the "signal for wireless power transmission 2001B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exists at frequencies other than the frequency BB1.

[0757] In other words, "wireless power transmission signal 2001B_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2001B_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at the same (common) frequency but at different times.

[0758] 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."

[0759] If the base station is a TRP, it is specifically implementing a (downlink) TDM method for signals for wireless power transmission by multiple TRPs.

[0760] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001B_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001B_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20B3 and 20B4.

[0761] Fig. 20B5 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #1 301_1 in Fig. 19A. In Fig. 20B5, the horizontal axis represents time and the vertical axis represents frequency.

[0762] Fig. 20B6 shows an example of the time and frequency arrangement of wireless power transmission signals transmitted by base station #2 301_2 in Fig. 19A. In Fig. 20B6, the horizontal axis represents time and the vertical axis represents frequency.

[0763] As shown in FIG. 20B5, "a wireless power transmission signal 2001B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" exists at the frequency BB1 and the time B1.

[0764] As shown in FIG. 20B6, "a wireless power transmission signal 2001B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exists at the frequency BB1 and the time B2.

[0765] It should be noted that the "signal for wireless power transmission 2001B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exists at frequencies other than the frequency BB1.

[0766] In other words, "wireless power transmission signal 2001B_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2001B_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist at the same (common) frequency but at different times.

[0767] 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."

[0768] If the base station is a TRP, it is specifically implementing a (downlink) TDM method for signals for wireless power transmission by multiple TRPs.

[0769] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2001B_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2001B_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figures 20B5 and 20B6.

[0770] The arrangement of the "wireless power transmission signal 2001B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and the "wireless power transmission signal 2001B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" on the time axis and frequency axis is not limited to the examples of "Figures 20B1, 20B2," "20B3, 20B4," and "20B5, 20B6." Any arrangement can be implemented in the same way as long as the "wireless power transmission signal 2001B_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and the "wireless power transmission signal 2001B_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" are present at the same (common) frequency but at different times."

[0771] Also, in Figure 19A, for example, two base stations or two TRPs transmit wireless power transmission signals using the TDM method, and terminal #1 of 302_1 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 #1 of 302_1 may obtain wireless power transmission signals from two or more base stations or two or more TRPs.

[0772] By implementing the above, the terminal can be charged efficiently, and the configurations of Figures 19B, 19C, and 19D have the effect of allowing the terminal to perform multiple charges.

[0773] Fig. 20C1 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. 19A. In Fig. 20C1, the horizontal axis represents time and the vertical axis represents frequency.

[0774] As shown in FIG. 20C1, "a wireless power transmission signal 2011C_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" exists at the frequency CC1 and the time C1.

[0775] Also, "a wireless power transmission signal 2011C_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exists at the frequency CC2 and the time C2.

[0776] In other words, "wireless power transmission signal 2011C_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and "wireless power transmission signal 2011C_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist on different frequencies.

[0777] 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."

[0778] 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.

[0779] 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.

[0780] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2011C_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2011C_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figure 20C1.

[0781] Another example of a "(Downlink) FDM method for wireless power transmission signals" will now be described.

[0782] Fig. 20C2 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. 19A. In Fig. 20C2, the horizontal axis represents time and the vertical axis represents frequency.

[0783] As shown in FIG. 20C2, "a wireless power transmission signal 2011C_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" exists at the frequency CC1 and the time C1.

[0784] Also, "a wireless power transmission signal 2011C_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exists at the frequency CC2 and the time C2.

[0785] That is, the "signal for wireless power transmission 2011C_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and the "signal for wireless power transmission 2011C_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exist at different frequencies. However, there may be a time period in which the "signal for wireless power transmission 2011C_1 transmitted by the base station #1 of 301_1 and addressed to the terminal #1 of 302_1" and the "signal for wireless power transmission 2011C_2 transmitted by the base station #2 of 301_2 and addressed to the terminal #1 of 302_1" exist at the same time.

[0786] 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."

[0787] 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.

[0788] Terminal #1 of 302_1 in Figure 19A charges its battery by receiving "wireless power transmission signal 2011C_1 transmitted by base station #1 of 301_1 to terminal #1 of 302_1" and "wireless power transmission signal 2011C_2 transmitted by base station #2 of 301_2 to terminal #1 of 302_1" in Figure 20C2.

[0789] The arrangement of the "wireless power transmission signal 2011C_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and the "wireless power transmission signal 2011C_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" on the time axis and frequency axis is not limited to the examples in Figures 20C1 and 20C2, and can be implemented in the same way regardless of the arrangement as long as the condition that "the "wireless power transmission signal 2011C_1 transmitted by base station #1 of 301_1 and addressed to terminal #1 of 302_1" and the "wireless power transmission signal 2011C_2 transmitted by base station #2 of 301_2 and addressed to terminal #1 of 302_1" exist on different frequencies is satisfied.

[0790] Also, in Figure 19A, for example, two base stations or two TRPs transmit signals for wireless power transmission using the FDM method, and terminal #1 of 302_1 obtains signals for wireless power transmission from the 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 #1 of 302_1 may obtain signals for wireless power transmission from two or more base stations or two or more TRPs.

[0791] By implementing the above, the terminal can be charged efficiently, and the configurations of Figures 19B, 19C, and 19D have the effect of allowing the terminal to perform multiple charges.

[0792] The "terminal configuration" and "operation of base station #1 301_1 and base station #2 301_2" when terminal #1 302_1 is set to the "parallel charging mode" in Fig. 18 are as described above. This allows terminal #1 302_1 to charge multiple batteries.

[0793] When terminal #1 of 302_1 charges multiple batteries, 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 in "FIGS. 20A1, 20A2," "20A3, 20A4," "20A5, 20A6," "20A7, 20A8," "20A9, 20A10," "20B1, 20B2," "20B3, 20B4," "20B5, 20B6," "20C1," and "20C2" may be different signals or the same signal because the charging is performed in parallel. Furthermore, a phase change may be performed on 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."

[0794] The "charging spot mode" will now be described.

[0795] Figure 21A shows an example of the relationship between "base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E and terminal #1 of 302_1 that receives a signal for power transmission transmitted by a "device for power transmission and / or communication" and charges a battery."

[0796] Base station #1 of 301_1 transmits a wireless power transmission signal to form chargeable area 1 of 2101_1A. Terminals present in chargeable area 1 of 2101_1A can charge batteries or the like.

[0797] Base station #2 301_2 transmits a wireless power transmission signal to form a chargeable area 2 2101_2A. Terminals present in the chargeable area 2 2101_2A can charge their batteries or the like.

[0798] In this way, the base station #1 of 301_1 and the base station #2 of 301_2 can provide a charging area.

[0799] For example, as shown in FIG. 21A, terminal #3 of 302_3 existing in chargeable area 1 of 2101_1A can charge a battery or the like.

[0800] Furthermore, the terminal #1 of 302_1 present in the chargeable area 2 of 2101_2 can charge a battery or the like.

[0801] Since the terminal #2 of 302_2 is not present in the chargeable area, the terminal #2 of 302_2 does not charge the battery or the like.

[0802] 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H, and detailed description thereof will be omitted. When transmitting a wireless power transmission signal, the base station #1 of 301_1 and the base station #2 of 301_2 may use multiple antennas to control transmission directivity.

[0803] For example, as shown in Fig. 21B, base station #1 of 301_1 may set a chargeable area at a position different from that shown in Fig. 21A. Base station #1 of 301_1 in Fig. 21B transmits a wireless power transmission signal to form chargeable area 1 of 2101_1B at a position different from the chargeable area shown in Fig. 21A.

[0804] 21B, the base station #2 of 301_2 may set a chargeable area at a position different from that of Fig. 21A. The base station #2 of 301_2 of Fig. 21B transmits a signal for wireless power transmission so as to form a chargeable area 2 of 2101_2B at a position different from the chargeable area of ​​Fig. 21B.

[0805] Fig. 21C1 shows an example of the setting of the charging area of ​​base station #1 of 301_1 on the time axis. Note that in Fig. 21C1, the horizontal axis represents time.

[0806] At time C1 in Fig. 21C1, base station #1 of 301_1 transmits a wireless power transmission signal to form chargeable area 1 of 2101_1A as shown in Fig. 21A. Then, at time C2, base station #1 of 301_1 transmits a wireless power transmission signal to form chargeable area 1 of 2101_1B as shown in Fig. 21B.

[0807] In this way, the base station #1 of 301_1 may transmit a wireless power transmission signal so as to change the position of the chargeable area depending on the time.

[0808] Fig. 21C2 shows an example of the setting of the charging area of ​​base station #2 of 301_2 on the time axis. Note that in Fig. 21C2, the horizontal axis represents time.

[0809] At time CC1 in Fig. 21C2, base station #2 of 301_2 transmits a signal for wireless power transmission so as to form chargeable area 2 of 2101_2A as shown in Fig. 21A. Then, at time CC2, base station #2 of 301_2 transmits a signal for wireless power transmission so as to form chargeable area 2 of 2101_2B as shown in Fig. 21B.

[0810] In this way, the base station #2 of 301_2 may transmit a wireless power transmission signal so as to change the position of the chargeable area depending on the time.

[0811] Figure 21D shows an example of the relationship between "base station #1 of 301_1 and base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E, and terminal #1 of 302_1 that receives a signal for power transmission transmitted by the "device for power transmission and / or communication" and charges the battery."

[0812] Base station #1 of 301_1 transmits (one or more, or two or more) wireless power transmission signals to form "chargeable area 1_1 of 2101_1_1D, chargeable area 1_2 of 2101_1_2D, ..., chargeable area 1_M of 2101_1_MD." Note that M is an integer equal to or greater than 1 or 2. Therefore, base station #1 of 301_1 forms one or more, or two or more chargeable areas.

[0813] Terminals present in "chargeable area 1_1 of 2101_1_1D, chargeable area 1_2 of 2101_1_2D, ..., chargeable area 1_M of 2101_1_MD" can charge batteries, etc.

[0814] Base station #2 of 301_2 transmits (one or more, or two or more) wireless power transmission signals to form "chargeable area 2_1 of 2101_2_1D, chargeable area 2_2 of 2101_2_2D, ..., chargeable area 2_N of 2101_2_ND." Note that N is an integer equal to or greater than 1 or 2. Therefore, base station #2 of 301_2 forms one or more, or two or more chargeable areas.

[0815] Terminals present in "chargeable area 2_1 of 2101_2_1D, chargeable area 2_2 of 2101_2_2D, ..., chargeable area 2_N of 2101_2_ND" can charge batteries, etc.

[0816] In this way, the base station #1 of 301_1 and the base station #2 of 301_2 can provide a charging area.

[0817] 1A, 1B, 1D1, 1D2, 1E, 1F, 1G, and 1H, and detailed description thereof will be omitted. When transmitting a wireless power transmission signal, the base station #1 of 301_1 and the base station #2 of 301_2 may use multiple antennas to control transmission directivity.

[0818] For example, as shown in FIG. 21E, the base station #1 of 301_1 may set the chargeable area differently from that shown in FIG. 21D. The base station #1 of 301_1 in FIG. 21E transmits a wireless power transmission signal to form "chargeable area 1_1 of 2101_1_1E, chargeable area 1_2 of 2101_1_2E, ..., chargeable area 1_M of 2101_1_ME," which are different in location from the chargeable areas in FIG. 21D. However, there may be chargeable areas whose location remains unchanged. Furthermore, the "number of chargeable areas formed by the base station #1 of 301_1 in FIG. 21D" and the "number of chargeable areas formed by the base station #1 of 301_1 in FIG. 21E" may be the same or different.

[0819] 21E, the base station #2 of 301_2 may set the chargeable area differently from that of FIG. 21D. The base station #2 of 301_2 of FIG. 21E transmits a signal for wireless power transmission so as to form "chargeable area 2_1 of 2101_2_1E, chargeable area 2_2 of 2101_2_2E, ..., chargeable area 2_N of 2101_2_NE," whose locations are different from those of the chargeable areas of FIG. 21D. However, there may be chargeable areas whose locations are not changed. Furthermore, "the number of chargeable areas formed by the base station #2 of 301_2 in FIG. 21D" and "the number of chargeable areas formed by the base station #2 of 301_2 in FIG. 21E" may be the same or different.

[0820] Fig. 21F1 shows an example of the setting of the charging area of ​​base station #1 of 301_1 on the time axis. In Fig. 21F1, the horizontal axis represents time.

[0821] At time F1 in Fig. 21F1, base station #1 of 301_1 transmits a wireless power transmission signal to form "chargeable area 1_1 of 2101_1_1D, chargeable area 1_2 of 2101_1_2D, ..., chargeable area 1_M of 2101_1_MD" as shown in Fig. 21D. Then, at time F2, base station #1 of 301_1 transmits a wireless power transmission signal to form "chargeable area 1_1 of 2101_1_1E, chargeable area 1_2 of 2101_1_2E, ..., chargeable area 1_M of 2101_1_ME" as shown in Fig. 21E.

[0822] In this way, the base station #1 of 301_1 may transmit a signal for wireless power transmission so as to change the position setting of the chargeable area depending on time.Furthermore, the base station #1 of 301_1 may transmit a signal for wireless power transmission so as to change the number of chargeable areas depending on time.

[0823] Fig. 21F2 shows an example of the setting of the charging area of ​​base station #2 of 301_2 on the time axis. In Fig. 21F2, the horizontal axis represents time.

[0824] At time FF1 in Fig. 21F2, base station #2 of 301_2 transmits a wireless power transmission signal to form "chargeable area 2_1 of 2101_2_1D, chargeable area 2_2 of 2101_2_2D, ..., chargeable area 2_N of 2101_2_ND" as shown in Fig. 21D. Then, at time FF2, base station #2 of 301_2 transmits a wireless power transmission signal to form "chargeable area 1_1 of 2101_1_1E, chargeable area 1_2 of 2101_1_2E, ..., chargeable area 1_M of 2101_1_ME" as shown in Fig. 21E.

[0825] In this way, the base station #2 of 301_2 may transmit a signal for wireless power transmission so as to change the position setting of the chargeable area depending on the time.Furthermore, the base station #2 of 301_2 may transmit a signal for wireless power transmission so as to change the number of chargeable areas depending on the time.

[0826] An example of the operation of the base station #1 of 301_1 when the base station #1 of 301_1 transmits a wireless power transmission signal so as to change the position of the chargeable area depending on the time, as shown in FIG. 21C1, will be described.

[0827] As shown in FIG. 22A, it is assumed that a base station #1 301_1 transmits a wireless power transmission signal and provides a chargeable area 1 2201_1A as in FIGS. 21A and 21B.

[0828] At this time, the base station #1 of 301_1 communicates with the server 2221. The base station #1 of 301_1 then provides the server 2221 with information related to the location of the charging area 1 of 2201_1A.

[0829] Server 2221 generates map information 2299 including information on the location of chargeable area 1 of 2201_1A from information related to the location of chargeable area 1 of 2201_1A obtained from base station #1 of 301_1. Note that position 2211_1A indicates the location on the map of chargeable area 1 of 2201_1A.

[0830] Then, the server 2221 will provide map information 2299 including information on the location of the chargeable area 1 of 2201_1A to "terminal #1 of 302_1, terminal #2 of 302_2, ..." via the network 2222.

[0831] The "base station #1 of 301_1, server 2221" may be configured as a single device. Also, the network 2222 may include base stations including the base station #1 of 301_1.

[0832] 22A , a base station such as "base station #2 of 301_2" can be used instead of "base station #1 of 301_1." When base station #2 of 301_2 is used, server 2221 generates map information 2299 including information on the locations of chargeable areas from information related to the locations of chargeable areas obtained from base station #2 of 301_2. Then, server 2221 provides map information 2299 including information on the locations of chargeable areas to the terminal via network 2222.

[0833] An example of the operation of base station #1 of 301_1 when base station #1 of 301_1 transmits a signal for wireless power transmission so as to change the position setting of the chargeable area depending on the time, as shown in FIG. 21F1, will be described.

[0834] As shown in Figure 22B, base station #1 of 301_1 transmits a signal for wireless power transmission, and as in Figures 21D and 21E, provides "chargeable area 1_1 of 2201_1_1B, chargeable area 1_2 of 2201_1_2B, ..., chargeable area 1_M of 2201_1_MB."

[0835] At this time, base station #1 of 301_1 communicates with server 2221. Then, base station #1 of 301_1 provides server 2221 with information related to the locations of "chargeable area 1_1 of 2201_1_1B, chargeable area 1_2 of 2201_1_2B, ..., chargeable area 1_M of 2201_1_MB."

[0836] Server 2221 generates map information 2299 including information on the locations of "chargeable area 1_1 of 2201_1_1B, chargeable area 1_2 of 2201_1_2B, ..., chargeable area 1_M of 2201_1_MB" from information related to the locations of "chargeable area 1_1 of 2201_1_1B, chargeable area 1_2 of 2201_1_2B, ..., chargeable area 1_M of 2201_1_MB" obtained from base station #1 of 301_1. Note that position 2211_1_1B indicates the position on the map of chargeable area 1_1 of 2201_1_1B, and position 2211_1_2B indicates the position on the map of chargeable area 1_2 of 2201_1_2B.

[0837] Then, server 2221 will provide map information 2299 including information on the locations of "chargeable area 1_1 of 2201_1_1B, chargeable area 1_2 of 2201_1_2B, ..., chargeable area 1_M of 2201_1_MB" to "terminal #1 of 302_1, terminal #2 of 302_2, ..." via network 2222.

[0838] The "base station #1 of 301_1, server 2221" may be configured as a single device. Also, the network 2222 may include base stations including the base station #1 of 301_1.

[0839] 22B , a base station such as "base station #2 of 301_2" can be used instead of "base station #1 of 301_1." When base station #2 of 301_2 is used, server 2221 generates map information 2299 including information on the locations of chargeable areas from information related to the locations of chargeable areas obtained from base station #2 of 301_2. Then, server 2221 provides map information 2299 including information on the locations of chargeable areas to the terminal via network 2222.

[0840] By doing the above, the terminal can obtain detailed information on "information on the charging area provided by base station #1 of 301_1 and information on the charging area provided by base station #2 of 301_2," thereby achieving the effect that the user can easily charge the terminal when desired.

[0841] In addition, the terminal can obtain detailed information on "information on the charging area provided by base station #1 of 301_1 and information on the charging area provided by base station #2 of 301_2" without communicating with the base station.

[0842] The "normal charging mode" will now be described.

[0843] In the "normal charging mode," for example, terminal #1 of 302_1 charges a battery or the like using a wireless power transmission signal transmitted by one base station.

[0844] For example, terminal #1 of 302_1 receives a wireless power transmission signal transmitted by "base station #1 of 301_1 in Figures 3A, 3B, 3C, 3D, and 3E" and charges a battery or the like.

[0845] As another example, terminal #1 of 302_1 receives a wireless power transmission signal transmitted by "base station #2 of 301_2 in Figures 3A, 3B, 3C, 3D, and 3E" and charges a battery or the like.

[0846] Assume that terminal #1 of 302_1 is a terminal capable of charging its battery in one or more of the modes "fixed mode," "mobile mode," "parallel charging mode," "charging spot mode," and "normal charging mode" in FIG. 18.

[0847] FIG. 23 shows an example of the structure of a transmission signal that terminal #1 of 302_1 transmits to "the base station for communication in FIGS. 3A, 3B, 3C, 3D, 3E, etc." at this time.

[0848] FIG. 23 shows an example of the structure of a transmission signal transmitted by terminal #1 of 302_1 on the time axis, with the horizontal axis representing time.

[0849] 23, the transmission signal transmitted by terminal #1 of 302_1 includes, for example, a control information symbol 2301 and a data symbol 2302. Note that the transmission signal may include symbols other than these.

[0850] The control information symbol 2301 includes set mode information 2311. The set mode information 2311 is any one of "fixed mode," "mobile mode," "parallel charging mode," "charging spot mode," and "normal charging mode" in Fig. 18 , and is information about the mode set by terminal #1 of 302_1.

[0851] 3A, 3B, 3C, 3D, 3E, etc., the communication base station (which may be base station #1 of 301_1 or base station #2 of 301_2) receives control information symbol 2301 and data symbol 2302 including mode information 2311 of FIG. 23 transmitted by terminal #1 of 302_1, and obtains the set mode information 2311.

[0852] FIG. 24 shows an example of the exchange when "terminal #1 of 302_1 in FIGS. 3A, 3B, 3C, 3D, and 3E transmits information about the set mode regarding the transmission method of the wireless power transmission signal."

[0853] As shown in Figure 24, terminal #1 of 302_1 in Figures 3A, 3B, 3C, 3D, and 3E transmits information on the set mode related to Figure 18 to the base station for communication (2421). Note that the method of existence of the base station for communication is as shown in Figures 3A, 3B, 3C, 3D, and 3E. Therefore, base station #1 of 301_1 and base station #2 of 301_2 may be the base station for communication. This also applies hereinafter. Also, a specific configuration example of the transmission signal transmitted by terminal #1 of 302_1 is as shown in Figure 23.

[0854] The communication base station receives the set mode information transmitted by terminal #1 of 302_1 (2441). Then, the communication base station determines the mode based on the set mode information (2442). The communication base station transmits the determined mode information to base station #1 of 301_1 and base station #2 of 301_2 (2443).

[0855] The base station #1 of 301_1 receives the mode information transmitted by the communication base station (2401), and the base station #1 of 301_1 performs processing for transmitting a signal for wireless power transmission (2402).

[0856] Therefore, base station #1 of 301_1 will perform processing for transmitting a signal for wireless power transmission corresponding to one of the modes of "fixed mode," "mobile mode," "parallel charging mode," "charging spot mode," and "normal charging mode" in Fig. 18. (However, base station #1 of 301_1 may not perform processing for transmitting a signal for wireless power transmission.) Note that the operation of base station #1 of 301_1 when transmitting a signal for wireless power transmission in each of the modes of "fixed mode," "mobile mode," "parallel charging mode," "charging spot mode," and "normal charging mode" has already been described, and therefore will not be described again.

[0857] The base station #2 of 301_2 receives the mode information transmitted by the communication base station (2401), an...

Claims

A terminal capable of being charged in a first mode and a second mode, a receiving unit that receives a power transmission signal transmitted by a first base station and a second base station in response to charging in the first mode or charging in the second mode; a charging unit that charges the terminal using the power transmission signal; A terminal equipped with: 　 When charging in the second mode is specified, the receiving unit receives a first reference signal and a second reference signal transmitted by the first base station and the second base station, respectively; a transmitter included in the terminal transmits first information and second information regarding phase adjustment values ​​determined based on the first reference signal and the second reference signal, respectively; the receiving unit receives the power transmission signal transmitted by the first base station and whose phase is adjusted based on the first information, and the power transmission signal transmitted by the second base station and whose phase is adjusted based on the second information; the charging unit charges the terminal using the power transmission signal whose phase has been adjusted based on the first information and the power transmission signal whose phase has been adjusted based on the second information. The terminal according to claim 1 . 　 When charging in the second mode is specified, the receiving unit receives a first reference signal and a second reference signal transmitted by the first base station and the second base station, respectively; a transmitter included in the terminal transmits third information and fourth information related to a transmission timing adjustment value determined based on the first reference signal and the second reference signal, respectively; the receiving unit receives the power transmission signal transmitted by the first base station, the transmission timing of which is adjusted based on the third information, and the power transmission signal transmitted by the second base station, the transmission timing of which is adjusted based on the fourth information; the charging unit charges the terminal using the power transmission signal whose transmission timing has been adjusted based on the third information and the power transmission signal whose transmission timing has been adjusted based on the fourth information. The terminal according to claim 1 . 　 When charging in the first mode is specified, the receiving unit receives the power transmission signal after the first randomization or the first phase change, which is transmitted by the first base station and has been subjected to a first randomization or a first phase change that changes the phase regularly in symbol units, and the power transmission signal after the second randomization or the second phase change, which is transmitted by the second base station and has been subjected to a second randomization or a second phase change that changes the phase regularly in symbol units; the charging unit charges the terminal using the power transmission signal after the first randomization or the first phase change and the power transmission signal after the second randomization or the second phase change. The terminal according to claim 1 . 　 the receiving unit receives the power transmission signal corresponding to the charging in the first mode or the charging in the second mode, which is transmitted by the first base station and the second base station, by a spatial multiplexing transmission scheme. The terminal according to claim 1 . 　 a control unit that determines transmission corresponding to charging in the first mode or transmission corresponding to charging in the second mode in order to charge a terminal capable of charging in the first mode and charging in the second mode; a transmitter that transmits to the terminal a power transmission signal corresponding to the determined transmission corresponding to charging in the first mode or the determined transmission corresponding to charging in the second mode, which is also transmitted to the terminal by another base station; A base station comprising: 　 When determining transmission corresponding to charging in the second mode, the transmitter transmits a first reference signal to the terminal; a receiving unit included in the base station receiving information on a phase adjustment value determined based on the first reference signal; The transmitter transmits the power transmission signal, the phase of which has been adjusted based on the information, to the terminal. The base station of claim 6. 　 the transmission frequencies of the first reference signal and the second reference signal when the power transmission signal whose phase has been adjusted based on the information and the power transmission signal whose phase has been adjusted by the other base station transmitting a second reference signal to the terminal are synchronized with each other are higher than the transmission frequencies of the first reference signal and the second reference signal when the power transmission signal whose phase has been adjusted based on the information and the power transmission signal whose phase has been adjusted by the other base station transmitting the second reference signal to the terminal are not synchronized with each other; The base station of claim 7. 　 When determining transmission corresponding to charging in the second mode, the transmitter transmits a first reference signal to the terminal; a receiving unit provided in the base station receives information regarding a transmission timing adjustment value determined based on the first reference signal; The transmitter transmits the power transmission signal, the transmission timing of which is adjusted based on the information, to the terminal. The base station of claim 6. 　 a time width of the power transmission signal in a case where the power transmission signal whose transmission timing has been adjusted based on the information and the power transmission signal whose transmission timing has been adjusted by the other base station transmitting the second reference signal to the terminal are not synchronized with each other is shorter than a time width of the power transmission signal in a case where the power transmission signal whose transmission timing has been adjusted based on the information and the power transmission signal whose transmission timing has been adjusted by the other base station transmitting the second reference signal to the terminal are synchronized with each other; The base station of claim 9. 　 When determining transmission corresponding to charging in the second mode, a start position of the power transmission signal in an in-phase-quadrature plane starts from any position on a concentric circle. The base station of claim 7. 　 When determining transmission corresponding to charging in the first mode, a first frame for the first mode transmitted by the base station to the terminal and a second frame for the first mode transmitted by the other base station to the terminal exist regularly; There is no signal for estimating a phase in the first frame and the second frame. The base station of claim 6. 　 When determining transmission corresponding to charging in the first mode, the transmitter transmits to the terminal the power transmission signal that has been subjected to first randomization or first phase change that regularly changes the phase in symbol units. The base station of claim 6. 　 the other base station transmits to the terminal the power transmission signal that has been subjected to second randomization or second phase change that regularly changes the phase in symbol units; The power transmission signal after the first randomization is a clockwise signal in an in-phase-quadrature plane, and the power transmission signal after the second randomization is a counterclockwise signal in an in-phase-quadrature plane, or The power transmission signal after the first randomization is a counterclockwise signal in an in-phase-quadrature plane, and the power transmission signal after the second randomization is a clockwise signal in an in-phase-quadrature plane. The base station of claim 13. 　 the power transmission signal transmitted by the transmitter and the power transmission signal transmitted by the other base station are transmitted to the terminal by a spatial multiplexing transmission method. The base station of claim 6. 　 A wireless power transmission system including a first base station, a second base station, and a terminal capable of being charged in a first mode and a second mode, a transmitting unit included in the first base station and a transmitting unit included in the second base station transmit a power transmission signal corresponding to charging in the first mode or charging in the second mode to the terminal; a receiving unit included in the terminal receives the power transmission signal transmitted by a transmitting unit included in the first base station and a transmitting unit included in the second base station; a charging unit provided in the terminal charges the terminal using the power transmission signal; Wireless power transmission system. 　 A terminal capable of being charged in a first mode and a second mode, receiving a power transmission signal corresponding to charging in the first mode or charging in the second mode, the power transmission signal being transmitted from a first base station and a second base station; Charging the terminal using the power transmission signal. How to receive power. 　 The base station determining transmission corresponding to charging in the first mode or transmission corresponding to charging in the second mode in order to charge a terminal capable of charging in the first mode and charging in the second mode; Another base station also transmits to the terminal, a power transmission signal corresponding to the determined transmission corresponding to charging in the first mode or the determined transmission corresponding to charging in the second mode, Power transmission method.

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