System, base station, terminal device, method and program for performing communication and wireless power transmission

Abstract

To provide a system including a base station and a terminal device which communicate with each other selectively using a plurality of wireless resources and capable of feeding power to the terminal device using a wireless resource which is not used for communication between the base station and the terminal device.SOLUTION: A base station generates a transmission signal including a dummy signal for wireless power transmission using a wireless resource not being used for communication among a plurality of wireless resources, and transmits the generated signal to a terminal device. The terminal device receives the transmission signal including the dummy signal transmitted from the base station, and outputs power of a reception signal as a received power. A battery may be charged using the received power.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a system, method, and program for performing communication and wireless power transmission by selectively using a plurality of wireless resources. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there is known a communication system in which communication is performed between a base station and a terminal device by using at least some of a plurality of radio resources set in a radio frame (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2017 / 164220 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional communication systems, terminal devices that connect to base stations for communication include portable terminal devices that mainly use power supplied from built-in batteries. These terminal devices require the cumbersome task of charging the built-in battery when the remaining charge in the built-in battery is low. In addition, terminal devices that use power supplied from a wired power line rather than a built-in battery are limited to use in places where such a power line is available. Thus, a power supply infrastructure that can supply power to various terminal devices that connect to base stations for communication has not yet been developed.

[0005] In the fifth generation and subsequent next-generation mobile communication systems, a rapid increase in terminal devices (e.g., user devices, IoT devices, etc.) that connect to base stations for communication is expected, and the development of communication infrastructure to handle the huge amount of traffic is underway. However, a power supply infrastructure capable of supplying power to the huge number of terminal devices that will perform the above-mentioned communication remains underdeveloped. [Means for solving the problem]

[0006] A system according to one aspect of the present invention includes a base station and a terminal device that can communicate with each other by selectively using a plurality of wireless resources. The base station of the system includes a communication signal processing unit that generates a transmission signal including a dummy signal for wireless power transmission using an unused wireless resource among the plurality of wireless resources that is not used for communication, and a wireless processing unit that transmits the transmission signal including the dummy signal for wireless power transmission to the terminal device. The terminal device of the system includes a wireless processing unit that receives the transmission signal including the dummy signal transmitted from the base station, and a power output unit that outputs the power of a reception signal that receives the transmission signal including the dummy signal as received power.

[0007] A base station according to another aspect of the present invention is a base station capable of communicating with a terminal device by selectively using a plurality of radio resources, the base station including a communication signal processor that generates a transmission signal including a dummy signal for wireless power transmission using an unused radio resource among the plurality of radio resources that is not used for communication, and a radio processor that transmits the transmission signal including the dummy signal for wireless power transmission to the terminal device.

[0008] A terminal device according to another aspect of the present invention is a terminal device capable of communicating with a base station by selectively using a plurality of wireless resources, the terminal device including: a wireless processing unit that receives a transmission signal including a dummy signal for wireless power transmission transmitted from the base station by using an unused wireless resource among the plurality of wireless resources that is not used for communication; and a power output unit that outputs, as received power, the power of a reception signal that has received the transmission signal including the dummy signal.

[0009] A method according to yet another aspect of the present invention is a method in which a base station and a terminal device selectively use a plurality of radio resources to communicate with each other, the method including: the base station generating a transmission signal including a dummy signal for wireless power transmission using an unused radio resource among the plurality of radio resources that is not used for communication; the base station transmitting the transmission signal including the dummy signal for wireless power transmission to the terminal device; the terminal device receiving the transmission signal including the dummy signal transmitted from the base station; and the terminal device outputting, as received power, a power of a received signal that has received the transmission signal including the dummy signal.

[0010] A program according to yet another aspect of the present invention is a program executed on a computer or a processor provided in a base station capable of communicating with a terminal device by selectively using a plurality of wireless resources, the program including: a program code for generating a transmission signal including a dummy signal for wireless power transmission using an unused wireless resource that is not used for communication among the plurality of wireless resources; and a program code for transmitting the transmission signal including the dummy signal for wireless power transmission to the terminal device.

[0011] A program according to yet another aspect of the present invention is a program executed in a computer or processor provided in a terminal device capable of communicating with a base station by selectively using a plurality of wireless resources, the program including: a program code for receiving a transmission signal including a dummy signal for wireless power transmission transmitted from the base station by using an unused wireless resource among the plurality of wireless resources that is not used for communication; and a program code for outputting, as received power, power of a reception signal that has received the transmission signal including the dummy signal.

[0012] In the system, the base station, the terminal device, the method, and the program, the terminal device may have a battery that is charged using the received power of the dummy signal.

[0013] In the system, the base station, the terminal device, the method and the program, the terminal device may perform wireless communication with the base station via a communication antenna, and receive a transmission signal including the dummy signal from the base station via a receiving antenna.

[0014] In the system, the base station, the terminal device, the method, and the program, the multiple radio resources may include multiple resource blocks defined by subcarriers on a frequency axis and slots on a time axis.

[0015] In the system, the base station, the terminal device, the method, and the program, the dummy signal for wireless power transmission may be a signal modulated by a symbol point having a maximum amplitude among a plurality of symbol points of a digital modulation method. Here, a primary modulation method of a transmission signal from the base station may be a QAM (quadrature amplitude modulation) method and a secondary modulation method may be an OFDM (orthogonal frequency division multiplexing) method, and the dummy signal for wireless power transmission may be a signal modulated by a symbol point having a maximum amplitude among a plurality of symbol points of the QAM method.

[0016] In the system, the base station, the terminal device, the method, and the program, the terminal device may transmit power control information used to control power transmission to the terminal device to the base station, and the base station may generate and transmit a transmission signal including the dummy signal based on the power control information received from the terminal device. Here, the power control information may include at least one of request information requesting power transmission to the terminal device, identification information capable of identifying the terminal device, location information of the terminal device, remaining battery charge information of the battery provided in the terminal device, and approval information approving the power transmission to the terminal device.

[0017] In the system, the base station, the terminal device, the method and the program, a transmission signal including a dummy signal for wireless power transmission using the unused wireless resources for communication may be generated for each of a plurality of terminal devices, and the transmission signal including the dummy signal may be transmitted using a different beam for each terminal device. Effect of the Invention

[0018] According to the present invention, it is possible to supply power to a terminal device by utilizing radio resources that are not being used in communication between a base station and the terminal device. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is an explanatory diagram showing an example of a schematic configuration of a system according to an embodiment. [Diagram 2] FIG. 1 is a block diagram showing an example of the main configuration of a base station and a terminal device (UE) constituting a system according to an embodiment. [Diagram 3] 1A is an explanatory diagram showing an example of allocation of WPT blocks in radio resources (resource blocks) of a transmission signal including a dummy signal for WPT transmitted from a base station according to an embodiment. FIG. 1B is an explanatory diagram showing an example of a spectrum on a frequency axis in secondary modulation of the OFDM method of a transmission signal transmitted from a base station according to an embodiment. [Figure 4] FIG. 2 is an explanatory diagram showing an example of an arrangement of symbol points in primary modulation of a QAM method of a transmission signal transmitted from a base station according to the embodiment. [Diagram 5] FIG. 11 is a block diagram showing another example of the main configuration of a base station and a terminal device (UE) according to the embodiment. [Figure 6] FIG. 11 is a block diagram showing yet another example of the main configuration of the base station and the terminal device (UE) according to the embodiment. [Figure 7] FIG. 2 is an explanatory diagram showing an example of power supply to each of a plurality of user equipments (UEs) by beamforming from a base station according to the embodiment; [Figure 8]FIG. 8 is an explanatory diagram showing an example of allocation of WPT blocks when power is supplied to each terminal device (UE) by the beamforming of FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The system according to the embodiment described in this specification is a system that effectively utilizes unused wireless resources (resource blocks) that are not used for communication among a plurality of wireless resources (resource blocks) set in a downlink wireless frame from a mobile communication base station to a terminal device (e.g., an IoT device having a communication function) for wireless power transmission (WPT) to the terminal device. The system according to the embodiment may be a wireless communication system between a base station and a terminal device having a wireless power transmission (WPT) function from the base station to the terminal device. The system according to the embodiment may also be a wireless power transmission (WPT) system from a base station to a terminal device having a wireless communication function between the base station and the terminal device.

[0021] 1 is an explanatory diagram showing an example of a schematic configuration of a system according to the present embodiment. The system according to the present embodiment includes a cellular base station 10 that forms a communication area (cell) 10A, and a terminal device (hereinafter also referred to as "UE" (user device)) 20 that is connected to the base station 10 and capable of wireless communication with the base station 10 when present in the communication area 10A.

[0022] The UE 20 may be a mobile station in a mobile communication system, or may be a combination of a communication device (for example, a mobile communication module) and various devices.

[0023] In FIG. 1, the base station 10 includes a plurality of array antennas 110 each having a large number of antenna elements, and can communicate with a plurality of UEs 20 using a massive MIMO (hereinafter also referred to as "mMIMO") transmission method. mMIMO is a wireless transmission technology that realizes large-capacity, high-speed communication by transmitting and receiving data using the array antenna 110. In addition, the base station 10 can communicate with a plurality of UEs 20 using a multi-user (MU)-MIMO transmission method that performs beamforming to form a beam 10B for each of the plurality of UEs 20 in a time-division or simultaneously. By performing MU-MIMO transmission using a multi-element array antenna, it is possible to improve the communication quality of the entire cell, since it is possible to communicate with a plurality of UEs 20 by directing an appropriate beam to each UE 20 according to the communication environment of each UE 20. In addition, it is possible to expand the system capacity, since it is possible to communicate with a plurality of UEs 20 using the same wireless resources (time and frequency resources).

[0024] 1, a part of the communication area 10A is a wireless power transmission area (hereinafter referred to as a "WPT area") 10A' in which wireless power transmission is performed from the base station 10 to the terminal device 20. The WPT area 10A' may be an area narrower than the communication area 10A as shown in the figure, or may be an area of ​​the same or approximately the same size and position as the communication area 10A.

[0025] In the WPT area 10A', unused wireless resources (resource blocks) that are not used for communication are utilized as wireless power transmission blocks among resource blocks that are multiple wireless resources (time and frequency resources) that configure a downlink wireless frame from the base station 10. The base station 10 generates a transmission signal in which a dummy signal for wireless power transmission (hereinafter also referred to as a "dummy signal for WPT") is assigned to the wireless power transmission block (WPT block), which is an unused wireless resource, in the downlink wireless frame to the UE 20, and transmits the transmission signal to the UE 20.

[0026] In particular, in fifth-generation or later-generation mobile communication systems, a technology called lean carrier has been proposed in which the minimum necessary reference signals (RS) and control signals are placed on only some of the subcarriers of a radio frame. It is expected that the unused radio resources in the radio frame can be effectively utilized to transmit wireless power to UE 20.

[0027] Fig. 2 is a block diagram showing an example of the main configuration of the base station 10 and the terminal device 20 constituting the system according to this embodiment. The base station 10 includes a base station device 100 and an antenna 110. The antenna 110 is, for example, an array antenna having a large number of antenna elements as shown in Fig. 1. There may be a single antenna 110 or multiple antennas 110. For example, multiple antennas 110 may be arranged corresponding to multiple sector cells.

[0028] The base station device 100 includes a communication signal processing unit 120 and a radio processing unit 130. The communication signal processing unit 120 processes signals such as various user data and control information transmitted and received between the UE 20. The radio processing unit 130 transmits a transmission signal generated by the communication signal processing unit 120 from the antenna 110 to the UE 20, and outputs a received signal received from the UE 20 via the antenna 110 to the communication signal processing unit 120.

[0029] In particular, in this embodiment, the communication signal processing unit 120 generates a downlink transmission signal including a dummy signal for WPT using a wireless resource that is not used for communication among a plurality of wireless resources during downlink communication with the UE 20. The downlink transmission signal including the dummy signal for WPT can be generated by modulating it with any modulation method. For example, the dummy signal for WPT may be a signal modulated with a symbol point having the maximum amplitude among a plurality of symbol points of a digital modulation method. Furthermore, for example, the generation of the transmission signal may include a primary modulation such as QAM (quadrature amplitude modulation) and a secondary modulation such as OFDM (orthogonal frequency division multiplexing modulation). Furthermore, the process of including a dummy signal for WPT using a wireless resource that is not used for communication in the transmission signal for downlink communication with the UE 20 may be performed autonomously by the base station 10, or may be performed based on a request or instruction from the UE 20 or a request or instruction from a management server.

[0030] In addition, in this embodiment, the radio processing unit 130 transmits a downlink transmission signal including a WPT dummy signal generated by the communication signal processing unit 120 to the UE 20 via the antenna 110.

[0031] The base station 10 may perform beamforming (BF) control to form an individual beam 10B for each UE 20 or for each UE group in a target area to which a plurality of UEs 20 belong, and may perform wireless power transmission for each UE 20 or for each UE group during downlink communication with the UE 20. The BF control for each UE 20 or for each UE group may be performed by digital BF control in the frequency domain in the communication signal processing unit 120, or may be performed by analog BF control in the radio processing unit 130.

[0032] 2, the UE 20 includes an antenna 210, a radio processing unit 220, a communication signal processing unit 230, a power output unit 240, and a battery 250. The radio processing unit 220 transmits a transmission signal generated by the communication signal processing unit 230 from the antenna 210 to the base station 10, and outputs a received signal received from the base station 10 via the antenna 210 to the communication signal processing unit 230.

[0033] Particularly, in this embodiment, the wireless processing unit 220 receives a transmission signal including a dummy signal for WPT transmitted from the base station 10. Also, the power output unit 240 has, for example, a rectifier, and outputs the power of the received signal that receives the transmission signal including the dummy signal for WPT from the base station 10 as received power for charging the battery. The battery 250 can be charged by the received power output from the power output unit 240.

[0034] FIG. 3(a) is an explanatory diagram showing an example of allocation of WPT blocks in radio resources (resource blocks) of a transmission signal including a dummy signal for WPT transmitted from a base station 10 according to the present embodiment. FIG. 3(b) is an explanatory diagram showing an example of a spectrum on a frequency axis in the secondary modulation of the OFDM method of a transmission signal transmitted from a base station 10 according to the present embodiment. As shown in FIG. 3(a), a plurality of radio resources used in downlink communication in the system of this embodiment are a plurality of resource blocks 30 defined by subcarriers on the frequency axis and slots on the time axis. Each resource block 30 has subcarriers 33 of a predetermined bandwidth that are orthogonal to each other on the frequency axis as shown in FIG. 3(b). A part of the plurality of resource blocks 30 is used as a communication resource block 31 to which a signal for downlink communication is assigned, and the remaining part hatched in the figure is used as a WPT block 32.

[0035] FIG. 4 is an explanatory diagram showing an example of the arrangement of symbol points 40 in the primary modulation of the QAM method of the transmission signal transmitted from the base station 10 according to this embodiment. FIG. 4 is a constellation diagram showing the arrangement of a plurality of symbol points (64-value symbol points) in the case of the 64QAM method, where the horizontal axis indicates the in-phase channel component and the vertical axis indicates the quadrature channel component. In this embodiment, a dummy signal for WPT modulated at any symbol point of the plurality of symbol points 40 of the QAM method can be used. For example, a dummy signal for WPT modulated at any of the outermost symbol points 41 having the maximum amplitude among the plurality of symbol points 40 of the QAM method may be used. In this case, the transmission power to the UE 20 can be maximized. Also, for example, when it is not necessary to maximize the transmission power, modulation may be performed at any symbol point other than the outermost symbol point. For example, as described below, the symbol point to be used for modulating the dummy signal for WPT may be determined and selected based on the transmission power indicated in the power control information received from a terminal device (UE) 20 such as an IoT device, or the symbol point to be used for modulating the dummy signal for WPT may be determined and selected based on the remaining battery level information included in the power control information received from the terminal device (UE) 20.

[0036] According to the systems of Figures 1 to 4, in downlink communication from the base station 10 to the UE 20, wireless resources unused for communication can be effectively utilized as wireless power transmission blocks (WPT blocks) to perform wireless power transmission (WPT) from the base station 10 to the UE 20.

[0037] Fig. 5 is a block diagram showing another example of the main configuration of the base station 10 and the terminal device (UE) 20 according to this embodiment. The example in Fig. 5 is an example of a system that can control wireless power transmission based on information uploaded from the UE 20 to the base station 10. In Fig. 5, parts common to the system in Fig. 2 are denoted by the same reference numerals, and description thereof will be omitted.

[0038] In Figure 5, the UE 20 transmits power control information used to control power transmission from the base station 10 to the UE 20 to the base station 10 via uplink communication, and the base station 10 generates a transmission signal including a dummy signal for WPT based on the power control information received from the UE 20 and transmits it to the UE 20.

[0039] The base station device 100 includes a power transmission control unit that controls the communication signal processing unit 120 so as to generate and transmit a transmission signal including a WPT dummy signal based on the power control information received from the UE 20.

[0040] The power control information includes, for example, at least one of request information (hereinafter also referred to as a "WPT request") requesting wireless power transmission to the UE 20 and terminal information. The terminal information is, for example, at least one of identification information capable of identifying the UE 20, location information of the UE 20, remaining amount information of the battery 250 included in the UE 20, and approval information approving power transmission to the UE 20.

[0041] In the system of FIG. 5, for example, when the base station 10 receives a WPT request and terminal information from the UE 20 through uplink communication, the base station 10 starts control of wireless power transmission to the UE 20 using the WPT request as a trigger.

[0042] Here, for example, if the terminal information includes identification information, the power transmission control unit 140 of the base station 10 can refer to the terminal database based on the identification information and determine whether the UE 20 that sent the WPT request is a UE that is a target for wireless power transmission or an authorized UE, and can control the inclusion of a dummy signal for WPT in the transmission signal only if the determination is positive.

[0043] For example, if the terminal information includes location information of UE 20, the power transmission control unit 140 of the base station 10 can control, based on the location information, to include a dummy signal for WPT in the transmission signal only when the UE 20 is located in a previously permitted area.

[0044] Also, for example, if the terminal information includes remaining charge information of the battery 250 of the UE 20, the power transmission control unit 140 of the base station 10 can control, based on the remaining charge information, to increase the number of dummy signals for WPT to be included in the transmission signal when the remaining charge of the battery 250 is low, and to decrease the number of dummy signals for WPT to be included in the transmission signal when the remaining charge of the battery 250 is high.

[0045] Also, for example, if the terminal information includes approval information for the UE 20, the power transmission control unit 140 of the base station 10 can control, based on the approval information, to include a dummy signal for WPT in the transmission signal only if the UE 20 is a UE 20 that has been approved in advance.

[0046] Fig. 6 is a block diagram showing yet another example of the main configuration of the base station 10 and the terminal device (UE) 20 according to this embodiment. The example in Fig. 6 is an example of a system in which the UE 20 includes an antenna for wireless power transmission and a wireless processing unit, and includes an IoT device 260 having a battery 250. In Fig. 6, parts common to the systems in Figs. 2 and 5 are denoted by the same reference numerals, and description thereof will be omitted.

[0047] 6, the UE 20 includes a first wireless processing unit 221 that performs wireless communication with the base station 10 via a communication antenna 211, and a second wireless processing unit 222 that receives a transmission signal including a dummy signal for WPT from the base station 10 via a power receiving antenna 212. The communication signal processing unit 230 generates a communication transmission signal such as data or control information and outputs it to the first wireless processing unit 221, processes a reception signal received via the communication antenna 211 and the first wireless processing unit 221, and outputs data, control information, etc. to the IoT device 260.

[0048] The second wireless processing unit 222 receives a transmission signal including a dummy signal for WPT transmitted from the base station 10 via the power receiving antenna 212, and passes it to the power output unit 240. The power output unit 240 has, for example, a rectifier, and outputs the power of the received signal that receives the transmission signal including the dummy signal for WPT from the base station 10 as received power for charging the battery. The battery 250 built in the IoT device 260 can be charged by the received power output from the power output unit 240.

[0049] FIG. 7 is an explanatory diagram showing an example of power supply for each UE by beamforming from the base station 10 according to the present embodiment to multiple UEs 20. FIG. 8 is an explanatory diagram showing an example of allocation of WPT blocks when power supply for each UE by beamforming in FIG. 7 is performed. FIGS. 7 and 8 show a case where multiple UEs 20(1) to 20(3) are present in a WPT area 10A' (see FIG. 1 above) in a communication area 10A, and the UEs 20(1) to 20(3) are powered via beams 10B(1) to 10B(3) formed for each UE. Each U An example of supplying power to E20(1)~20(3) is shown.

[0050] In FIG. 7, the base station device 100 of the base station 10 performs beamforming (BF) control for each UE in the communication signal processing unit 120 or the radio processing unit 130. The allocation of WPT blocks to each UE can be performed, for example, as shown in FIG. 8. In FIG. 8, a part of the multiple resource blocks 30 used in downlink communication is used as a communication resource block 31 to which a signal of the downlink communication is allocated. Among the remaining part of the multiple resource blocks 30, four WPT blocks 32(1) with first hatching in the figure are used to feed power to the first UE 20(1) via the beam 10B(1), and two WPT blocks 32(2) with second hatching are used to feed power to the second UE 20(2) via the beam 10B(2). In addition, six WPT blocks 32(3) with cross-hatching in the figure are used to feed power to the third UE 20(3) via the beam 10B(3).

[0051] As described above, according to this embodiment, it is possible to supply power to the UE (terminal device) 20 by utilizing radio resources that are not being used in communication between the base station 10 and the UE (terminal device) 20.

[0052] It should be noted that the process steps and system components described herein may be implemented by various means. For example, these steps and components may be implemented in hardware, firmware, software, or a combination thereof.

[0053] Regarding hardware implementation, means such as processing units used to realize the above steps and components in an entity (e.g., various wireless communication devices, base station devices (Node B, Node G), terminal devices, hard disk drive devices, or optical disk drive devices) may be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, electronic devices, other electronic units designed to perform the functions described in this specification, computers, or combinations thereof.

[0054] Also, for firmware and / or software implementation, the means such as processing units used to realize the above components may be implemented with programs (e.g., codes such as procedures, functions, modules, instructions, etc.) that execute the functions described herein. In general, any computer / processor readable medium tangibly embodying firmware and / or software codes may be used to implement the means such as processing units used to realize the above steps and components described herein. For example, the firmware and / or software codes may be stored in a memory and executed by a computer or processor, for example in a controller. The memory may be implemented within the computer or processor, or may be implemented externally to the processor. Also, the firmware and / or software codes may be stored in a computer or processor readable medium, such as a random access memory (RAM), a read-only memory (ROM), a non-volatile random access memory (NVRAM), a programmable read-only memory (PROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a floppy disk, a compact disk (CD), a digital versatile disk (DVD), a magnetic or optical data storage device, etc. The code may be executed by one or more computers or processors and may cause the computers or processors to perform certain aspects of the functionality described herein.

[0055] The medium may be a non-transitory recording medium. The code of the program may be in any format as long as it can be read and executed by a computer, a processor, or another device or machine, and the format is not limited to a specific format. For example, the code of the program may be any of source code, object code, and binary code, or may be a mixture of two or more of these codes.

[0056] Moreover, the description of the embodiments disclosed herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. [Explanation of symbols]

[0057] 10:Base station 10A: Communication area 10A': WPT Area 10B: Beam 20: Terminal device 30: Resource block 31: Communication resource block 32: WPT block (wireless power transmission block) 32(1)~32(3): WPT block (wireless power transmission block) 33: Subcarrier 40: Symbol point 41: Symbol point 100:Base station equipment 110: Antennas, array antennas 120: Communication signal processing section 130: Radio processing unit 140: Power transmission control unit 210: Antenna 211: Communication antenna 212: Receiving antenna 220: Radio processing unit 221: First radio processing unit 222: Second radio processing unit 230: Communication signal processing section 240: Power output section 250:Battery 260: IoT Devices

Claims

1. A system including a base station and a terminal device capable of communicating with each other by selectively using a plurality of radio resources, The base station, a single communication signal processing unit that is shared for processing a transmission signal and a reception signal of communication with the terminal device using a radio resource for communication among the plurality of radio resources, and for processing a transmission signal including a dummy signal for wireless power transmission modulated at a symbol point selected for wireless power transmission from a plurality of symbol points of a digital modulation method for downlink communication to the terminal device, using an unused radio resource not used for communication among the plurality of radio resources; a single radio processing unit that is shared by a radio transmission process of the communication for transmitting a transmission signal of the communication to the terminal device, a radio reception process of the communication for receiving a reception signal of the communication from the terminal device, and a radio transmission process of the wireless power transmission for transmitting a transmission signal including a dummy signal for the wireless power transmission to the terminal device; The terminal device a radio processing unit that receives a transmission signal including the dummy signal transmitted from the base station; a power output unit that outputs, as received power, the power of a received signal that has received a transmission signal including the dummy signal.

2. A system including a base station and a terminal device capable of communicating with each other by selectively using a plurality of radio resources, The base station has the same device configuration used for wireless communication with the terminal device and for wirelessly supplying power to the terminal device using a dummy signal for wireless power transmission modulated at a symbol point selected for wireless power transmission from a plurality of symbol points of a digital modulation method for downlink communication to the terminal device using unused wireless resources among the plurality of wireless resources that are not used for communication.

3. In the system of claim 1 or 2, A system in which the dummy signal for wireless power transmission is a signal modulated at a symbol point having the maximum amplitude among a plurality of symbol points of a digital modulation method.

4. A system including a base station and a terminal device capable of communicating with each other by selectively using a plurality of radio resources, The base station, a single communication signal processing unit that is shared for processing a transmission signal and a reception signal of communication with the terminal device using a wireless resource for communication among the plurality of wireless resources, and for generating a transmission signal including a dummy signal for wireless power transmission using an unused wireless resource that is not used for communication among the plurality of wireless resources; a single radio processing unit that is shared by a radio transmission process of the communication for transmitting a transmission signal of the communication to the terminal device, a radio reception process of the communication for receiving a reception signal of the communication from the terminal device, and a radio transmission process of the wireless power transmission for transmitting a transmission signal including a dummy signal for the wireless power transmission to the terminal device; The terminal device a radio processing unit that receives a transmission signal including the dummy signal transmitted from the base station; a power output unit that outputs, as received power, the power of a received signal that has received a transmission signal including the dummy signal; A system in which the dummy signal for wireless power transmission is a signal modulated at a symbol point having the maximum amplitude among a plurality of symbol points of a digital modulation method.

5. A system including a base station and a terminal device capable of communicating with each other by selectively using a plurality of radio resources, The base station, a communication signal processing unit that generates a transmission signal including a communication signal using a communication radio resource used for communication among a plurality of radio resources allocated to the same slot on a time axis in a radio frame for downlink communication to the terminal device, and a dummy signal for wireless power transmission using an unused communication radio resource that is not used for communication; a wireless processing unit that transmits a transmission signal including the communication signal and the dummy signal for wireless power transmission to the terminal device in the same slot, The terminal device a radio processing unit that receives a transmission signal including the communication signal and the dummy signal in the same slot transmitted from the base station; a power output unit that outputs, as received power, the power of a received signal that has received a transmission signal including the dummy signal; In the same slot, wirelessly supplying power to the terminal device by using the unused radio resource in a radio frame for downlink communication to the terminal device, and communicating with the terminal device by using the radio resource for communication; A system in which the dummy signal for wireless power transmission is a signal modulated at a symbol point having the maximum amplitude among a plurality of symbol points of a digital modulation method.

6. A system including a base station and a terminal device capable of communicating with each other by selectively using a plurality of radio resources, the base station has the same device configuration used for wireless communication with the terminal device and for wireless power supply to the terminal device by a dummy signal for wireless power transmission that is assigned to an unused wireless resource that is not used for communication among the plurality of wireless resources, A system in which the dummy signal for wireless power transmission is a signal modulated at a symbol point having the maximum amplitude among a plurality of symbol points of a digital modulation method.

7. 7. The system of claim 1, The system, wherein the plurality of radio resources include a plurality of resource blocks defined by subcarriers on a frequency axis and slots on a time axis.

8. In a system according to any one of claims 3 to 6, The primary modulation method of the transmission signal from the base station is QAM (quadrature amplitude modulation) and the secondary modulation method is OFDM (orthogonal frequency division multiplexing), A system in which the dummy signal for wireless power transmission is a signal modulated by a symbol point having the maximum amplitude among a plurality of symbol points of the QAM (quadrature amplitude modulation) method.

9. In a system according to any one of claims 1 to 8, The terminal device transmits power control information used to control power transmission to the terminal device to the base station; The base station generates and transmits a transmission signal including the dummy signal based on the power control information received from the terminal device.

10. 10. The system of claim 9, The system, wherein the power control information includes at least one of request information requesting power transmission to the terminal device, identification information capable of identifying the terminal device, location information of the terminal device, remaining battery charge information of the battery provided in the terminal device, and approval information approving the power transmission to the terminal device.

11. In a system according to any one of claims 1 to 10, The base station, generating a transmission signal including a dummy signal for wireless power transmission using the unused wireless resource for communication with each of a plurality of terminal devices; A system that transmits a transmission signal including the dummy signal using a plurality of beams that differ for each terminal device.

12. A base station that selectively uses a plurality of radio resources to communicate with a terminal device, a single communication signal processing unit that is shared for processing a transmission signal and a reception signal of communication with the terminal device using a radio resource for communication among the plurality of radio resources, and for processing a transmission signal including a dummy signal for wireless power transmission modulated at a symbol point selected for wireless power transmission from a plurality of symbol points of a digital modulation method for downlink communication to the terminal device, using an unused radio resource not used for communication among the plurality of radio resources; A base station comprising: a single radio processing unit that is shared for radio transmission processing of communication for transmitting a transmission signal of the communication to the terminal device, radio reception processing of communication for receiving a reception signal of the communication from the terminal device, and radio transmission processing of wireless power transmission for transmitting a transmission signal including a dummy signal for the wireless power transmission to the terminal device.

13. The base station of claim 12, A base station, wherein the dummy signal for wireless power transmission is a signal modulated at a symbol point having a maximum amplitude among a plurality of symbol points of a digital modulation method.

14. A base station that selectively uses a plurality of radio resources to communicate with a terminal device, a single communication signal processing unit that is shared for processing a transmission signal and a reception signal of communication with the terminal device using a wireless resource for communication among the plurality of wireless resources, and for generating a transmission signal including a dummy signal for wireless power transmission using an unused wireless resource that is not used for communication among the plurality of wireless resources; a single radio processing unit that is shared by a radio transmission process of the communication for transmitting a transmission signal of the communication to the terminal device, a radio reception process of the communication for receiving a reception signal of the communication from the terminal device, and a radio transmission process of the wireless power transmission for transmitting a transmission signal including a dummy signal for the wireless power transmission to the terminal device; A base station, wherein the dummy signal for wireless power transmission is a signal modulated at a symbol point having a maximum amplitude among a plurality of symbol points of a digital modulation method.

15. A base station that selectively uses a plurality of radio resources to communicate with a terminal device, a communication signal processing unit that generates a transmission signal including a communication signal using a communication radio resource used for communication among a plurality of radio resources allocated to the same slot on a time axis in a radio frame for downlink communication to the terminal device, and a dummy signal for wireless power transmission using an unused communication radio resource that is not used for communication; a wireless processing unit that transmits a transmission signal including the communication signal and the dummy signal for wireless power transmission to the terminal device in the same slot, A base station, wherein the dummy signal for wireless power transmission is a signal modulated at a symbol point having a maximum amplitude among a plurality of symbol points of a digital modulation method.

16. 16. A base station according to any one of claims 12 to 15, A base station, wherein the plurality of radio resources include a plurality of resource blocks defined by subcarriers on a frequency axis and slots on a time axis.

17. 16. A base station according to any one of claims 12 to 15, The primary modulation method of the transmission signal from the base station is QAM (quadrature amplitude modulation) and the secondary modulation method is OFDM (orthogonal frequency division multiplexing), The base station, wherein the dummy signal for wireless power transmission is a signal modulated by a symbol point having a maximum amplitude among a plurality of symbol points of the QAM (quadrature amplitude modulation) system.

18. 16. A base station according to any one of claims 12 to 15, receiving power control information from the terminal device, the power control information being used to control power transmission to the terminal device; A base station that generates and transmits a transmission signal including the dummy signal based on the power control information received from the terminal device.

19. 20. The base station of claim 18, A base station, wherein the power control information includes at least one of request information requesting power transmission to the terminal device, identification information capable of identifying the terminal device, location information of the terminal device, remaining battery charge information of the battery provided in the terminal device, and approval information approving the power transmission to the terminal device.

20. 16. A base station according to any one of claims 12 to 15, generating a transmission signal including a dummy signal for wireless power transmission using the unused wireless resource for communication with each of a plurality of terminal devices; A base station that transmits a transmission signal including the dummy signal using a plurality of beams that differ for each of the terminal devices.

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