KR20160045597A - Terminal and power charching method thereof - Google Patents

Terminal and power charching method thereof Download PDF

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Publication number
KR20160045597A
KR20160045597A KR1020150143553A KR20150143553A KR20160045597A KR 20160045597 A KR20160045597 A KR 20160045597A KR 1020150143553 A KR1020150143553 A KR 1020150143553A KR 20150143553 A KR20150143553 A KR 20150143553A KR 20160045597 A KR20160045597 A KR 20160045597A
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KR
South Korea
Prior art keywords
terminal
signal
base station
power
magnetic interference
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KR1020150143553A
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Korean (ko)
Inventor
주형식
장갑석
김선애
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한국전자통신연구원
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Priority to US14/885,798 priority Critical patent/US20160112078A1/en
Publication of KR20160045597A publication Critical patent/KR20160045597A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A terminal and a power charging method thereof are disclosed. The terminal comprises: an information transmitting unit for generating a first signal corresponding to an uplink signal transmitted to a base station; and a power harvesting unit for receiving a magnetic interference signal generated by the first signal, and charging power by using the magnetic interference signal.

Description

[0001] TERMINAL AND POWER CHARGING METHOD THEREOF [0002]

The present invention relates to a terminal and its power charging method.

Various energy harvesting and wireless power transmission schemes have been developed to solve the battery consumption problem of a terminal in a wireless communication system. Among the various methods, there is a wireless power transmission technique using radio frequency (RF). For power transmission using RF, a rectifier antenna is used in which a diode and a low-pass filter are connected to the antenna. The rectifier antenna converts the received RF energy into electric energy, and it is known that the energy conversion efficiency is about 70 to 80%. RF power transmission technology using RF has advantages that it is easy to transmit and multicast long distance power and is suitable for the mobility of a terminal as compared with other wire power transmission methods. However, wireless power transmission technology using RF has a disadvantage that power transmission efficiency is low due to attenuation of RF signal due to distance and influence of radio channel.

In a conventional wireless power transmission technique using RF, a base station having a stable power source transmits power to a terminal in a downlink, and the terminal transmits wireless information in an uplink using the received power. At this time, the downlink for wireless power transmission and the uplink for wireless information transmission are classified into a half-duplex (HD) scheme. However, such a half-duplex scheme causes waste of time or frequency resources, thereby reducing power transmission efficiency and information transmission efficiency.

On the other hand, the in-band Full Duplex (IFD) scheme can transmit and receive radio signals simultaneously in the same band, theoretically, the link capacity can be doubled. However, in the same-band full duplex (IFD) scheme, its transmission signal acts as a strong interference to the effective reception signal. That is, the transmission signal of the transmitter itself is transmitted to the receiver in the form of self-interference (SI). Self-interference cancellation (Self-Interference Cancellation) is very complicated and difficult to implement. In particular, it is difficult to express frequency-specific characteristics in a broadband system and is sensitive to the surrounding environment (multipath fading environment) and the mobility of the terminal. In the same-band full-duplex scheme, a very large quantization error occurs when an analog-to-digital converter (ADC) is performed through AGC (Automatic Gain Control) as compared with a half-duplex scheme. In the same-band full-duplex scheme, AGC and ADC are performed on the sum of the self-received signal and the self-interference because a self-transmitted interference signal that is much larger than the self-received signal is introduced into the received signal. Due to this, it is difficult to apply a high-order modulation scheme (for example, Quadrature Amplitude Modulation (M-QAM)) because the same-band full-duplex scheme can have a very high quantum error. Also, the power consumption for SIC can be very large.

SUMMARY OF THE INVENTION The present invention provides a terminal using a magnetic interference signal for power charging and a power charging method thereof.

According to an embodiment of the present invention, a terminal is provided. The mobile station includes an information transmitter configured to generate a first signal corresponding to an uplink signal transmitted to a base station, and a receiver configured to receive a magnetic interference signal generated by the first signal and to charge power using the magnetic interference signal Power harvesting section.

The terminal includes a first band pass filter for passing a band corresponding to the uplink signal, a second band pass filter for passing a band corresponding to a downlink signal received from the base station, A distributor for transmitting the band-pass filter and transmitting the magnetic interference signal to the power harvesting unit, and an information receiving unit for decoding the signal passing through the second band-pass filter.

The terminal includes an information receiver for decoding a downlink signal received from the base station, a distributor for transmitting the first signal through an antenna and transmitting the magnetic interference signal to the power harvesting unit, And a switch for switching between the antenna and the information receiving unit.

The terminal may operate in a time division duplex mode, and when the terminal is in a transmission mode, the switch may connect the antenna and the distributor, and when the terminal is in a reception mode, The information receiving units can be connected to each other.

The terminal includes an information receiving unit for decoding a downlink signal received from the base station, a distributor for transmitting the first signal through an antenna and transmitting the magnetic interference signal to the power harvesting unit, And a first switch for switching between the distributor and the information receiving unit.

The first switch may be connected between the distributor and the information receiving unit when the terminal operates in the same band full duplex mode, and the first switch may operate in a time division duplex mode when the terminal is in a transmission mode, May connect the divider and the power harvesting unit and the magnetic interference signal may be input to the power harvesting unit through the divider.

When the terminal operates in the time division duplex mode and the terminal is in the reception mode, the first switch can connect the distributor and the receiver.

When the terminal is at a first distance from the base station, the terminal can operate in the same-band full-duplex manner, and if the terminal is at a second distance from the base station, Time division duplex mode.

The power harvesting unit may include a battery unit that stores power, and an energy harvesting unit that converts the magnetic interference signal into a form that can be charged to the battery unit, and outputs the converted magnetic interference signal to the battery unit.

The energy harvesting unit may include a diode for rectifying the magnetic interference signal, and a low-pass filter for passing only low-frequency signals at the diode output.

The power harvesting unit may charge power using a power signal transmitted from the base station.

According to another embodiment of the present invention, a method is provided in which a terminal that transmits an uplink signal to a base station and receives a downlink signal from the base station charges the power. The method may include generating a first signal corresponding to the uplink signal, extracting a magnetic interference signal in the first signal, and charging the power using the magnetic interference signal. have.

The method may further include determining whether the terminal is within a predetermined distance from the base station, and if the terminal is within the predetermined distance, the terminal may operate in the same band full duplex manner, If the terminal is not within the predetermined distance, the terminal can operate in a time division half duplex manner.

According to another embodiment of the present invention, a terminal is provided. The terminal includes an information transmitter for generating a first signal corresponding to an uplink signal transmitted to a base station, an information receiver for decoding a downlink signal received from the base station, and a mobile station using an interference signal generated by the first signal And a switch for switching between the antenna and the power harvesting unit or between the antenna and the information receiving unit according to a mode.

The mode may include a transmission mode and a reception mode. When the terminal operates in a time division half-duplex mode and the terminal is in the transmission mode, the first switch connects the antenna and the power harvesting unit, The magnetic interference signal may be input to the power harvesting unit.

The terminal may further include a distributor located between the antenna and the switch and located between the antenna and the information transmitter, and the magnetic interference signal may be input to the power harvesting unit through the distributor and the switch .

When the terminal is at a first distance from the base station, the terminal operates in the same-band full-duplex manner, and if the terminal is at a second distance from the base station a second distance from the base station, It can operate in half duplex mode.

According to the embodiment of the present invention, the energy use efficiency can be increased by using the magnetic interference signal for power charging.

According to another embodiment of the present invention, various transmission schemes can be implemented by manipulating switches, and magnetic interference signals can be used for power charging.

1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
2 is a block diagram illustrating a terminal according to an embodiment of the present invention.
3 is a view showing an energy harvesting unit according to an embodiment of the present invention.
4 is a diagram illustrating a terminal according to a first embodiment of the present invention.
5 is a diagram illustrating a terminal according to a second embodiment of the present invention.
6 is a diagram illustrating a terminal according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, a terminal is referred to as a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station (HR- A subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), a user equipment (UE) , HR-MS, SS, PSS, AT, UE, and the like.

Also, a base station (BS) is an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, eNodeB), an access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) BS, RS, HR, RS, etc.) may be referred to as a high reliability relay station (HR-RS) -RS, and the like.

1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.

As shown in FIG. 1, a wireless communication system according to an embodiment of the present invention includes a base station 100 and a terminal 200. In FIG. 1, although the base station 100 and the terminal 200 are shown as a single unit, they may be plural units.

In the wireless communication system according to the embodiment of the present invention, power (energy) transmission and information transmission are performed in the same band. That is, both the base station 100 and the terminal 200 operate in a full duplex manner.

The base station 100 transmits a signal to the terminal 200 through a downlink. At this time, the signals included in the downlink may include data (corresponding to the information transmission in FIG. 1) and power (corresponding to the energy transmission in FIG. 1).

When the signal transmitted from the base station 100 includes valid data (information transmission), the terminal 200 demodulates the data. The terminal 200 harvests the energy when the signal transmitted from the supporting station 100 does not contain valid data (in the case of energy transmission), and maintains its function and uplinks using the harvested energy, It is used as power required for information transmission.

1, x B is a transmission signal of the base station 100, and x M is a transmission signal of the terminal 200. h D is the channel through which x B passes on the downlink, h U is the channel through which x M passes on the uplink, and h SI is the magnetic interference (SI) channel through which x M passes. Since the terminal 200 operates in the same band full duplex manner, the terminal 200 acts as interference with its own transmission signal and is referred to as self interference (SI). The channel for this self-interference (SI) is denoted h SI .

The base station 100 performs an SIC to demodulate a signal transmitted from a mobile station. The terminal 200 may perform SIC when demodulating a signal transmitted from the base station 100, but may not perform SIC when energy is collected without demodulating the signal.

Meanwhile, the wireless communication system of FIG. 1 can be extended to a multi-user environment through a scheme such as Time Division Multiple Access (TDMA).

2 is a block diagram illustrating a terminal 200 according to an embodiment of the present invention. In an embodiment of the present invention, the terminal 200 uses a magnetic interference (SI) signal for battery charging.

2, a terminal 200 according to an embodiment of the present invention includes an information transmitter 210, a power harvesting unit 220, and a full duplex transceiver 230.

The full duplex transceiver 230 includes a splitter 231 and a port 1 so that the terminal 200 can perform a full duplex transmission / reception operation. The distributor 231 transmits the transmission signal x U of the information transmitter 210 to the port Port 1 and the distributor 231 transmits the reception signal received through the port Port 1 to an information receiver send. The distributor 231 according to the embodiment of the present invention also outputs a signal received through the port Port 1 to the power harvesting unit 200. The distributor 231 may be implemented as a circulator, an electrical balancing duplexer (EBD), or the like. The port (Port 1) may be one port among the various ports of the distributor 231. As shown in FIGS. 4 to 6, a port (Port 1) may be connected with a band pass filter (BPF), a switch, or an antenna. The specific configuration and operation of the distributor 231 will be apparent to those skilled in the art to which the present invention pertains, and a detailed description thereof will be omitted.

The power harvesting unit 200 includes an energy harvester 221 and a battery unit 222. The energy harvesting unit 221 converts the output signal y U of the full-duplex transceiver unit 230 into a form in which the battery unit 222 can be charged. An RF (Radio Frequency) signal received from the base station 100 is converted into an AC electric signal by an antenna (not shown), and the AC signal is transmitted to a port (Port 1) of the duplex transceiver 230 ≪ / RTI > A part of the transmission signals x U of the information transmission unit 210 flows back to the port Port 1 in the form of a magnetic interference (SI) signal, and this incoming signal is also an AC electric signal. Hereinafter, the magnetic interference signal SI generated by the transmission signal of the information transmission unit 210 is used in combination with the leakage signal of the distributor 231. [ On the other hand, the distributor 231 outputs the alternating electric signal to the energy harvesting unit 221, and the alternating electric signal is denoted by y U in FIG.

FIG. 3 is a diagram showing an energy harvesting unit 221 according to an embodiment of the present invention.

3, the energy harvesting unit 221 according to the embodiment of the present invention includes a Schottky diode 221a and a low pass filter 221b. The configuration of the energy harvesting unit 221 shown in FIG. 3 is a rectifier structure, which converts the alternating current of y U into a direct current (i DC ). The specific operation of the energy harvesting unit 221 will be apparent to those skilled in the art to which the present invention pertains, and a detailed description thereof will be omitted.

The DC current i DC generated by the energy harvesting unit 221 is input to the battery unit 222 and the battery unit 222 charges the battery using the DC current i DC . The detailed configuration and operation of the battery unit 222 will be apparent to those skilled in the art and will not be described in detail.

Meanwhile, the information transmitting unit 210 generates a signal x U to be transmitted from the terminal 200 to the base station 100. The signal x U generated in the information transmission unit 210 corresponds to x M in FIG.

2, the information transmission unit 210 includes a baseband unit 211, a digital-analog conversion unit 212, a mixer 213,

The baseband unit 211 generates a baseband signal, which is a digital signal, and the digital-analog converter 212 converts the digital signal into an analog signal. The mixer 213 multiplies the analog signal by the carrier frequency, and the power amplifier 214 amplifies the transmission signal and transmits the amplified transmission signal to the full duplex transmission unit 230.

The amount of energy harvested by the terminal 200 as shown in FIG. 2 is mathematically expressed by Equation 1 below.

Figure pat00001

In Equation (1)

Figure pat00002
Is the amount of energy harvested by the terminal 200,
Figure pat00003
Represents energy harvesting efficiency. T represents the reception time of y U. And,
Figure pat00004
Is the ratio of energy input to the power harvesting unit 220 through the distributor 231 among the energies of the transmission signal x M or x U. In other words,
Figure pat00005
(Magnetic interference signal) energy of the information transmission unit 210. [ On the other hand, when the terminal 200 receives the power harvesting signal from the base station 100
Figure pat00006
, And if not
Figure pat00007
to be.

The terminal 200 according to the embodiment of the present invention can increase the energy use efficiency of the terminal by using a magnetic interference signal larger than the effective reception signal for power harvesting.

The structure and operation of the terminal 200 may vary depending on the transmission / reception mode of the terminal 200 when the terminal 200 charges the magnetic interference signal (i.e., the leakage signal). Hereinafter, various structures of the terminal 200 will be described with reference to FIGS. 4 to 6. FIG.

4 is a diagram illustrating a terminal 200a according to the first embodiment of the present invention. The terminal 200a according to the first embodiment of the present invention operates in a frequency division duplex (FDD) mode and uses a self interference (SI) signal generated in a frequency division half duplex system for battery charging.

4, the terminal 200a according to the first embodiment of the present invention includes an information transmitter 210, a power harvesting unit 220, a distributor 231, an information receiver 240, a first band- A second band-pass filter 250a ', and an antenna 260. [ The terminal 200a of FIG. 4 is similar to the terminal of FIG. 3 except for the addition of the information receiving unit 240 and the two band-pass filters 250a and 250a '.

In FIG. 4, f D represents the center carrier frequency of the downlink, and f U represents the center carrier frequency of the uplink. Because of the frequency division half duplex scheme, the bandwidth allocated to the uplink and the bandwidth allocated to the downlink are different. Therefore, the terminal 200a passes only the uplink band through the first bandpass filter 250a and passes only the downlink band through the second bandpass filter 250a '. Meanwhile, the first band-pass filter 250a is located between the antenna 260 and the distributor 231. That is, the first band-pass filter 250a is connected to the port (Port 1 in FIG. 1) of the distributor 231. The second band pass filter 250a 'is located between the antenna 260 and the information receiving unit 240.

The information receiving unit 240 includes a low noise amplifier 244, a mixer 243, an analog-to-digital converting unit 242, and a baseband unit 241 as a general receiving end structure.

The transmission signal output from the information transmission unit 210 is transmitted through the distributor 231 and the first band-pass filter 250a. The transmission signal generates a magnetic interference signal (i.e., a leakage signal), and the magnetic interference signal is input to the power harvesting unit 200 through the distributor 231. The power harvesting unit 220 converts the magnetic interference signal into a chargeable form to charge the battery. Meanwhile, the downlink signal (the data signal transmitted from the base station 100) is input to the information receiving unit 240 through the second band-pass filter 250a '. The second bandpass filter 250a 'operates in the downlink band and prevents the transmission signal of the information transmitter 210 from being fed back to the information receiver 240.

The terminal 200a according to the first embodiment of the present invention uses the magnetic interference signal for energy harvesting and prevents the reception signal of the downlink band to be decoded by the information receiving terminal 240 from being used for energy harvesting .

5 is a diagram illustrating a terminal 200b according to a second embodiment of the present invention. The terminal 200b according to the second embodiment of the present invention operates in a time division duplex (TDD) mode and uses a self interference (SI) signal generated in a time division half duplex mode for battery charging.

5, the terminal 200b according to the second embodiment of the present invention includes an information transmitter 210, a power harvesting unit 220, a distributor 231, an information receiver 240, a bandpass filter 250b An antenna 260, and a switch 270. 4, the terminal 200b according to the second embodiment of the present invention includes one band-pass filter 250b and a switch 270. As shown in FIG.

The switch 270 is located between the bandpass filter 250b and the distributor 231 and between the bandpass filter 250b and the information receiver 240. [ That is, the information transmitting unit 210 and the power harvesting unit 220 are connected to the antenna 260 through the switch 270, and the information receiving unit 240 is also connected to the antenna 260 through the switch 270.

If the terminal (200b) is in the receive mode (i.e., when the terminal (200b) receives information from the base station 100 on the downlink), S 11 to S 12 are closed.

If the terminal (200b) the transmission mode (that is, the terminal (200b), the base station 100 on the uplink information when transmitting), S 11 to S 13 are closed. At this time, the transmission signal output from the information transmission unit 210 generates a magnetic interference signal (leakage signal), and the magnetic interference signal is input to the power harvesting unit 220 through the distributor 231. The power harvesting unit 220 converts the magnetic interference signal into a chargeable form to charge the battery.

On the other hand, when the base station 100 also operates in TDD, the base station 100 does not transmit when transmitting the terminal 200b. Accordingly, the amount of energy harvested by the terminal 200b is expressed by Equation (2) below.

Figure pat00008

When the base station 100 operates in a full duplex manner, the base station 100 can also transmit a power signal on the downlink while the terminal 200b transmits information on the uplink. Since the terminal 200b can also use the power signal received from the base station 100 for power harvesting, the amount of energy harvested by the terminal 200b is expressed by Equation 3 below.

Figure pat00009

When the terminal 200b is in a mode of receiving energy (i.e., when the terminal 200b receives energy from the base station 100), S11 is closed to S13 and the information transmitter 210 is turned off.

6 is a diagram showing a terminal 200c according to the third embodiment of the present invention.

The terminal 200c according to the third embodiment of the present invention operates in the same band full duplex (IFD) mode and uses a self interference (SI) signal generated in the same band full duplex mode for battery charging.

6, the terminal 200c according to the third embodiment of the present invention includes an information transmitter 210, a power harvesting unit 220, a distributor 231, an information receiver 240c, an antenna 260, The first to third switches 271 to 273, the analog SIC unit 280, and the digital SIC unit 290. 5, the terminal 200c according to the embodiment of the present invention includes four switches 271 to 273, an analog SIC unit 280, and a digital SIC unit 290 in order to remove a magnetic interference signal. The information receiving unit 240c further includes two signal converters 245 and 246 to remove the magnetic interference signal.

The first switch 271 is located between the distributor 231 and the power harvesting unit 220 (and the information receiving unit 240c). The second switch 272 is located between the analog SIC unit 280 and the signal merge unit 245 and the third switch 273 is located between the digital SIC unit 290 and the signal merge unit 246. The fourth switch 274 is located between the distributor and the information transmitter 210.

The analog SIC unit 280 is located between the rear end of the power amplifier 214 and the front end of the low noise amplifier 244 and removes the magnetic interference (SI) signal using an analog circuit. The analog SIC unit 280 may be implemented by a finite impulse response (FIR) filter or the like, but a specific configuration and operation thereof will be apparent to those skilled in the art to which the present invention pertains, .

The digital SIC unit 290 is located between the front end of the digital-to-analog converter 212 and the rear end of the analog-to-digital converter 242 and uses digital processing to remove the magnetic interference (SIC) signal. The specific configuration and operation of the digital SIC unit 290 will be apparent to those skilled in the art and will not be described in detail.

When the terminal 300c operates in the same band full duplex (IFD) mode, the fourth switch S4 may be always closed or omitted. At this time, when the terminal 300c is located at the center of the cell, it operates in the same band full duplex (IFD) mode and when the terminal 300c is at the edge of the cell, it can operate in the time division duplex (TDD) mode. When the terminal 300c operates in the same band full duplex (IFD) mode, self interference cancellation (SIC) is required to receive information, and power can not be harvested using the self interference (SI) signal. However, when the terminal 300c operates in the time division duplex (TDD) mode, the power harvester 220 of the terminal 300c transmits the leakage signal of the information transmitter 210 input through the distributor 231 Interference signal) for power harvesting. On the other hand, closes both terminals (300c) are the same band full-duplex (IFD), when operating in such a way, the first 1 S 11 terminal of the switch 271 is closed and S 13 the second switch 272 and third switch 273.

Meanwhile, the terminal 300c according to the third embodiment of the present invention can transmit data information on the uplink and receive power from the base station 100 on the downlink. At this time, the terminal S 11 of the first switch 271 is closed to S 12 , the second switch 272 and the third switch 273 are opened, and the fourth switch S 4 is closed. At this time, the power harvesting unit 220 of the terminal 300c receives the power signal transmitted from the base station 100 through the downlink and the leakage signal of the information transmitting unit 210 input through the distributor 231 Signal) to harvest power.

The terminal S 11 of the first switch S71 is closed to S 12 or S 13 and the terminals of the second switch 272 and the third switch 273 are closed It opens. The operation at this time is as follows. The information receiving unit 240c or the power harvesting unit 220 is connected to the antenna 260 through the first switch 271. [ Terminal (when receiving information from the other words, the base station 100 on the downlink) (300c) is in when the information reception mode, the S 11 terminal of the first switch 271 is closed to S 13 terminal and the fourth switch (S4) Is opened. If the terminal (200c), the information transmission mode S 11 terminal is closed to S 12 and the fourth switch 274 (that is, when transmitting the information to the base station 100 in an uplink), a first switch 271, Fig. Closed. At this time, the power harvesting unit 220 of the terminal 200c uses a leakage signal (i.e., a magnetic interference signal) input through the distributor 231 for power harvesting. If the base station 100 also operates in the time division duplex (TDD) mode, the base station 100 does not transmit while the terminal 200c transmits information, so the amount of energy harvested by the terminal 200c is Equation 2 is as follows. However, when the base station 100 operates in the same-band full duplex mode, the base station 100 can also transmit the power signal while the terminal 200c transmits information, so that the amount of energy harvested by the terminal 200c is (3).

The structure of the terminal 100c according to the third embodiment of the present invention not only can realize various transmission schemes by manipulating switches, but also can use a magnetic interference signal for power charging.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (17)

An information transmitter for generating a first signal corresponding to an uplink signal transmitted to the base station, and
And a power harvesting unit receiving the magnetic interference signal generated by the first signal and charging the power using the magnetic interference signal,
Terminal. The method according to claim 1,
A first band-pass filter for passing a band corresponding to the uplink signal,
A second bandpass filter for passing a band corresponding to a downlink signal received from the base station,
A divider to transmit the first signal to the first band pass filter and to transmit the magnetic interference signal to the power harvesting section, and
And an information receiver for decoding a signal passing through the second band-pass filter
Terminal The method according to claim 1,
An information receiver for decoding a downlink signal received from the base station,
A distributor for transmitting the first signal through an antenna and for transmitting the magnetic interference signal to the power harvesting unit, and
Further comprising a switch for switching between the antenna and the distributor or between the antenna and the information receiver
Terminal. The method of claim 3,
The terminal operates in a time division half duplex manner,
When the terminal is in a transmission mode, the switch connects the antenna and the distributor to each other,
When the terminal is in the reception mode, the switch connects the antenna and the information receiver to each other
Terminal. The method according to claim 1,
An information receiver for decoding a downlink signal received from the base station,
A distributor for transmitting the first signal through an antenna and for transmitting the magnetic interference signal to the power harvesting unit, and
Further comprising a first switch for switching between the distributor and the power harvesting unit or between the distributor and the information receiving unit
Terminal. 6. The method of claim 5,
When the terminal operates in the same band full duplex mode, the first switch connects the distributor and the information receiver,
The first switch connects the divider and the power harvesting unit when the terminal operates in a time division half duplex manner and the terminal is in a transmission mode and the magnetic interference signal is input to the power harvesting unit through the distributor
Terminal. The method according to claim 6,
When the terminal operates in the time division half duplex mode and the terminal is in the reception mode, the first switch connects the distributor and the receiver
Terminal. The method according to claim 6,
When the terminal is at a first distance from the base station, the terminal operates in the same band full duplex manner,
When the terminal is at a second distance from the base station by a distance greater than the first distance, the terminal operates in the time division half duplex manner
Terminal. The method according to claim 1,
The power harvesting unit includes:
A battery section for storing electric power, and
And an energy harvesting section for converting the magnetic interference signal into a form that can be charged into the battery section and outputting the magnetic interference signal to the battery section
Terminal. 10. The method of claim 9,
The energy harvesting unit includes:
A diode for rectifying the magnetic interference signal, and
And a low-pass filter for passing only a low-frequency signal at the diode output
Terminal. The method according to claim 1,
The power harvesting unit may perform power charging using a power signal transmitted from the base station
Terminal. CLAIMS What is claimed is: 1. A method for charging an uplink signal to a base station and receiving a downlink signal from the base station,
Generating a first signal corresponding to the uplink signal,
Extracting a magnetic interference signal from the first signal, and
And using the magnetic interference signal to charge the power. 13. The method of claim 12,
Further comprising the step of determining whether the terminal is within a predetermined distance from the base station,
When the terminal is within the predetermined distance, the terminal operates in the same band full duplex manner,
If the terminal is not within the predetermined distance, the terminal operates in a time division half duplex manner
Way. An information transmitter for generating a first signal corresponding to an uplink signal transmitted to a base station,
An information receiver for decoding a downlink signal received from the base station,
A power harvesting unit for using the magnetic interference signal generated by the first signal to charge the power, and
A switch for switching between the antenna and the power harvesting section or between the antenna and the information receiving section,
Terminal. 15. The method of claim 14,
The mode includes a transmission mode and a reception mode,
Wherein the first switch connects the antenna and the power harvesting unit when the terminal operates in a time division half duplex manner and the terminal is in the transmission mode and the magnetic interference signal is input to the power harvesting unit
Terminal. 15. The method of claim 14,
And a distributor located between the antenna and the switch and located between the antenna and the information transmitter,
The magnetic interference signal is input to the power harvesting unit through the distributor and the switch
Terminal. 15. The method of claim 14,
When the terminal is at a first distance from the base station, the terminal operates in the same band full duplex manner,
When the terminal is at a second distance from the base station by a distance greater than the first distance, the terminal operates in the time division half duplex manner
Terminal.
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