KR100806725B1 - Uwb wireless terminal and method of supplying power for uwb wireless terminal and computer-readable medium having thereon program performing function embodying the same - Google Patents

Abstract

A UWB wireless terminal, a method for supplying power to a UWB wireless terminal and a computer-readable recording medium having a program for realizing the same thereon are provided to receive an RF signal for inducing power from a band different from a UWB transmission/reception band, induce power, and provide the induced power to a UWB wireless terminal. The first antenna(100) transmits/receives an RF signal for communication of UWB data. A data transmitting/receiving unit(200) transmits/receives UWB data based on the first antenna(100). The second antenna(300) wirelessly receives a power induction signal. A power inducing unit(400) induces power based on the power induction signal and supplies the induced power to the data transmitting/receiving unit(200). The power induction signal is received by the second antenna(300) by using an ISM band.

Description

ＵＷＢUWB WIRELESS TERMINAL AND METHOD OF SUPPLYING POWER FOR UWB WIRELESS TERMINAL AND COMPUTER-READABLE MEDIUM HAVING THEREON PROGRAM PERFORMING FUNCTION EMBODYING THE SAME }

1 illustrates an exemplary configuration of a UWB wireless terminal in accordance with the present invention.

2 to 4 is a view showing an exemplary configuration of a power induction unit in the UWB wireless terminal according to the present invention.

5 is an exemplary flowchart of a power supply method of a UWB wireless terminal according to the present invention;

<Description of the symbols for the main parts of the drawings>

100: first antenna 200: data transceiver

210: UWB MAC 230: UWB transmit / receive baseband section

250: UWB transmit / receive RF unit 270: Tx / Rx filter

300: second antenna 400: power induction unit

410: waveform shaping portion 430: rectifying portion

450: power buffer 470: voltage level control unit

490: power charging unit

The present invention relates to a UWB wireless terminal and a power supply method of the UWB terminal and a computer-readable recording medium recording a program for realizing the same. More particularly, the present invention relates to a UWB wireless terminal that performs wireless communication of data in a UWB communication method. Receiving a wireless signal for inducing power from a band other than the UWB transmission / reception band for power supply, inducing power, and providing the induced power to the UWB wireless terminal, such as charging a battery for operation of a conventional UWB wireless terminal. The present invention relates to a UWB wireless terminal and a power supply method for a UWB terminal, and a computer-readable recording medium having recorded thereon a program for realizing the inconvenience.

Research on ultra wide band (UWB) technology, which is superior in speed and power consumption and can be operated at low power, is being actively conducted, compared to IEEE 802.11 and Bluetooth, which are two axes of existing wireless communication technologies. In particular, UWB technology is a revolutionary wireless communication in the home appliance sector, making it suitable for a personal area network (PAN) that connects personal computers, peripherals, and appliances, which are located within a 10m distance from an office or home, with a high-speed wireless interface. It is emerging as a technology.

The UWB communication method uses a frequency band of 500 MHz or more, or uses a fraction bandwidth of 20% or more. Pulse type UWB transmitter / receiver has ultra-high speed data transmission in a short distance, and the pulse width used for transmitting / receiving is very short, so it can be applied to a system that can determine the position of high precision. A system using a wireless UWB signal transmits / receives a transmission signal between a host terminal (PNC) and a slave terminal (DEV), or between respective terminals, and enables high-speed communication as well as transmission and reception of a transmission signal and a reception signal. The time difference can be used to measure the distance between them.

This UWB wireless technology can transmit data from 100Mbps to several Gbps at high speed in a short distance, so that it can be used for home network applications such as HDTV and DVD, IEEE 1394, wired USB storage terminal, digital camera and mobile HDD. It could be replaced wirelessly. Meanwhile, when an existing host system or host terminal (TV, DVD, PC, AUDIO) and a slave terminal (USB memory, camcorder, digital camera, etc.) are connected by wire, power supply of the slave terminal is mostly performed at the host terminal. However, when the wired connection is replaced by a wireless device, the slave terminal should have a separate power supply device for transmitting / receiving a wireless signal and driving a UWB modem. In this case, the battery power to be used as the power supply must be charged or replaced after a certain time has elapsed. In other words, the power supply device mounted separately in the conventional UWB wireless terminal has the inconvenience of having to recharge or replace a new one after a predetermined time by using a rechargeable or disposable battery such as the battery.

An object of the present invention is to receive a radio signal for inducing power from a band other than the UWB transmit / receive band and induce power to supply power to a UWB wireless terminal that performs data wireless communication in a UWB communication method. The present invention provides a power supply method for a UWB wireless terminal and a UWB terminal that improves inconvenience such as battery charging for operation of a conventional UWB wireless terminal by providing the wireless terminal.

Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for realizing each step of the power supply method of the UWB wireless terminal described above.

In order to achieve the above technical problem, the present invention provides a first antenna for transmitting and receiving radio signals for communication of UWB data, a data transceiver for transmitting and receiving the UWB data based on the first antenna, and a power supply Provided is a UWB wireless terminal including a second antenna for wirelessly receiving an induction signal and a power induction unit for inducing power to be supplied to the data transceiver based on the power induction signal.

In the UWB wireless terminal according to the present invention, the power induction signal may be received at the second antenna using the ISM band.

In addition, in the UWB wireless terminal according to the present invention, the power induction signal may be received by the second antenna using a band other than the band used for transmitting and receiving the UWB data.

In the UWB wireless terminal according to the present invention, the power induction unit may include a waveform shaping unit for shaping the power induction signal, and a rectifying unit rectifying the output of the waveform shaping unit and converting the DC power.

In addition, the UWB wireless terminal according to the present invention may further include a power buffer unit for maintaining the output level of the DC power supply of the rectifier at a constant level.

In addition, the UWB wireless terminal according to the present invention may further include a voltage level adjusting unit for adjusting the voltage of the output level so that the output level of the DC power supply of the rectifier is suitable for the power level of the data transceiver.

In addition, the UWB wireless terminal according to the present invention may further include a power charging unit that performs charging based on the DC power of the rectifying unit.

In addition, in the UWB wireless terminal according to the present invention, the waveform shaping unit may be a band pass filter for receiving only signals of the ISM band and removing signals of other bands.

In another aspect, the present invention provides a power supply method of a UWB wireless terminal, the method comprising the steps of: (a) wirelessly receiving a power induction signal transmitted from the outside using a band other than a band used for transmitting and receiving UWB data in the UWB wireless terminal; And (b) inducing power based on the power induction signal, and (c) supplying the induced power to the UWB wireless terminal.

In the power supply method of the UWB wireless terminal according to the present invention, the power induction signal may be transmitted using the ISM band.

In addition, in the power supply method of the UWB wireless terminal according to the present invention, the step (a) may include (a-1) receiving the power induction signal at the antenna for receiving the power induction signal. .

In addition, in the power supply method of the UWB wireless terminal according to the present invention, the step (b), (b-1) shaping the power induction signal, (b-2) rectified the shaped power induction signal Converting to a DC power source.

In addition, in the power supply method of the UWB wireless terminal according to the present invention, the step (b) may further include (b-3) maintaining the output level of the converted DC power supply to a constant level.

In addition, in the power supply method of the UWB wireless terminal according to the present invention, the step (b) is (b-4) of the output level so that the output level of the converted DC power is suitable for the power level of the UWB wireless terminal And further comprising adjusting the voltage.

In addition, in the power supply method of the UWB wireless terminal according to the present invention, the step (b) may further comprise the step of performing charging based on the (b-5) the converted DC power.

The present invention also provides a computer-readable recording medium having recorded thereon a program for realizing each step of the power supply method of the UWB wireless terminal described above.

Hereinafter, the power supply method of the UWB wireless terminal and the UWB wireless terminal of the present invention and a computer-readable recording medium recording a program for realizing the same will be described in more detail with reference to the accompanying drawings.

1 is a diagram showing an exemplary configuration of a UWB wireless terminal according to the present invention.

As shown, the UWB wireless terminal according to the present invention includes a first antenna 100, a data transmission / reception unit 200, a second antenna 300, and a power induction unit 400.

The first antenna 100 transmits and receives a radio signal for communication of UWB data. The first antenna 100 may have a coiled or spiral or other shape.

The data transmission / reception unit 200 performs transmission and reception of UWB data based on the first antenna 100.

As shown, the data transmission / reception unit 200 includes a Tx filter 270a, a UWB transmit RF unit 250a, a UWB transmit baseband unit 230a, a UWB MAC 210a, an Rx filter 270b, and a UWB receive RF unit ( 250b), UWB receiving baseband portion 230b and UWB MAC 210b by way of example.

The UWB transmit / receive RF units 250a and 250b are parts for processing UWB data transmitted and received through the first antenna 100.

At the time of transmission, a pulse or a transmission signal is generated and shaped by the Tx filter 270a so as to match the band to which use is permitted. The shaped signal is sent to an amplifier (not shown) and amplified into a signal capable of driving the first antenna 100, and the amplified signal is emitted into the air through the first antenna 100.

At the reception, the signal received from the first antenna 100 is filtered using the Rx filter 270b and then sent to a low noise amplifier (LNA, not shown) to improve the signal to noise ratio (SNR).

The signal amplified by the LNA is down-converted, shifted in frequency, and then sent to an analog-to-digital converter (ADC) to be converted into a digital signal. The detection and synchronization of the transmitted signal can be handled analog or digitally. The calculation of the received signal uses coherent, non-coherent, and delayed coherent.

The UWB transmit / receive baseband units 230a and 230b convert a form of a signal to transmit data and load a data signal on a pulse to send the signal to the air.

The transmitting end encodes the transmission signal to a Forward Error Correction (FEC) error corrector (not shown) in order to recover an error when the receiver receives the transmission signal. This coded signal is sent to the radio wave and sent to an interleaving unit (not shown) which converts the order of the signals so as not to be interfered with by external effects occurring momentarily. The signal output from the interleaving unit is modulated, and methods such as pulse position modulation (PPM), biphase phase shift keying (BPSK), and amplitude modulation (AM) are used for modulation. The output of the modulator (not shown) is spread by the spreading code which is the same or several ten times faster than the output speed of the modulator to spread the band. As the spread signal is generated, a pulse signal is generated and then input to the first antenna 100 and radiated to the air.

The receiving end restricts the received signal to a desired band through the first antenna 100, then amplifies the signal by sending it to a low noise amplifier which suppresses noise components and amplifies the received signal, and inputs it to a correlator (not shown). The power corresponding to the received signal is obtained by comparing the PN (Pseudo Noise) code. The output of the correlator passes through a block deinterleaver (not shown) and is then used as a decoder input signal to generate information data by decoding.

The UWB MAC (Media Access Control: 210a, 210b) is used to transmit / receive signals transmitted / received by the transmitter / receiver, the UWB transmit / receive RF unit 250a, 250b, and the UWB transmit / receive baseband unit 230a, 230b. To control. To this end, the UWB MACs 210a and 210b are connected to the transmitting end, the receiving end, or in common to control each signal flow in the UWB terminal.

The second antenna 300 wirelessly receives the power guidance signal. The second antenna 300 may have a coiled or spiral or other shape.

The UWB wireless terminal according to the present invention is characterized in that the antenna for transmitting and receiving UWB data, that is, the first antenna 100, and the antenna for receiving the power guidance signal, that is, the second antenna 300 is characterized in that it is provided separately. Alternatively, the first antenna 100 and the second antenna 300 according to the present invention may be integrated in one antenna according to the design, but even in this case, transmission and reception of UWB data and reception of a power guide signal are performed. It can be clearly distinguished according to.

That is, in the case of the UWB band, the power level of the signal is low, and in the case of using the signal in the UWB band, a complex configuration is required to induce power in the UWB wireless terminal, thus increasing the manufacturing cost and increasing the volume of the UWB wireless terminal. In addition, when the UWB data and the power induction signal are transmitted in the same band, it may affect the efficient reception of the UWB data. Therefore, it is preferable to receive the power induction signal in a separate band other than the band for transmitting and receiving UWB data, and the second antenna 300 receives the power induction signal in this separate band.

For example, the power induction signal is transmitted using the ISM band, and the second antenna 300 performs the signal reception of the ISM band. For example, ISM bands such as 900 MHz, 2.4 GHz, and 5.4 GHz can be used for the transmission and reception of power source guidance signals.

In addition to the other ISM bands, transmission and reception of the power induction signal may be performed using a band other than the band used for transmitting and receiving the UWB data.

Currently, the band allocated for the transmission and reception of UWB data is 3.1 GHz to 10.7 GHz, particularly in the United States, and is limited to a signal level of -41.3 dBm / MHz.

Therefore, a power source is used by using a band excluding a band allocated for transmitting and receiving UWB data or a band excluding a band used for transmitting and receiving UWB data even within the 3.1 GHz to 10.7 GHz band allocated for transmitting and receiving UWB data. It is possible to transmit and receive guidance signals.

Such a power induction signal can be configured to be transmitted from an external wireless power signal generator (not shown) to the UWB wireless terminal according to the present invention.

The power induction unit 400 induces power to the data transmission / reception unit 200 based on the power induction signal received through the second antenna 300.

The power induction unit 400 includes a waveform shaping unit 410 and a rectifying unit 430 as shown.

The waveform shaping unit 410 shapes the power induction signal received through the second antenna 300. For example, when performing transmission and reception of a power induction signal using the aforementioned ISM bands of 900 MHz, 2.4 GHz, and 5.4 GHz, the waveform shaping unit 410 passes only signals of the corresponding ISM band and removes signals of other bands. do.

The rectifier 430 rectifies the output of the waveform shaping unit 410 and converts the output to the DC power supply. In other words, the AC signal passing through the waveform shaping unit 410 is rectified and converted into a DC power source.

The detailed configuration of the power induction unit 400 will be described with reference to FIGS. 2 to 4.

2 to 4 is a view showing an exemplary configuration of the power induction unit in the UWB wireless terminal according to the present invention.

2 to 4, the power induction unit 400 of the UWB wireless terminal according to the present invention may further include a power buffer unit 450, a voltage level adjusting unit 470, or a power charging unit 490.

The power buffer unit 450 maintains the output level of the DC power supply of the rectifier 430 at a constant level. That is, the magnitude of the DC voltage may change depending on the magnitude of the input signal. Therefore, since the output level of the DC power supply of the rectifier 430 may change due to a change in the signal magnitude upon receiving the power induction signal, buffering is performed to maintain the output level of the DC power supply constantly.

The voltage level controller 470 adjusts the output level voltage of the DC power source to match the output level of the DC power source of the rectifier 430 to the power level of the data transceiver 200. That is, when a difference between the voltage level of the DC power source induced by the power induction unit 400 and the voltage level used for the operation of the data transmission / reception unit 200 occurs, it is a configuration for compensating for this.

The power charger 490 performs charging based on the DC power of the rectifier 430. The power charging unit 490 then provides the charged power to the data transmission / reception unit 200 to enable the operation of the UWB wireless terminal according to the present invention even when there is no power induction signal.

Through such a configuration, the UWB wireless terminal according to the present invention can improve the inconvenience caused by frequent charging of the battery, which is a disadvantage of the conventional configuration, and induce power by using a band other than the UWB band. Interference can be minimized.

5 is an exemplary flowchart of a power supply method of a UWB wireless terminal according to the present invention.

5 is a flowchart of a power supply method applied to a UWB wireless terminal according to the present invention described with reference to FIGS. 1 to 4.

As shown in the figure, first, a UWB wireless terminal wirelessly receives a power induction signal transmitted from the outside using a band other than a band used for transmitting and receiving UWB data (S110).

The band used for receiving the power guidance signal is, for example, an ISM band such as 900 MHz, 2.4 GHz, or 5.4 GHz, or a band used for transmitting and receiving UWB data, that is, 3.1 GHz allocated for transmitting and receiving UWB data in the United States. It may be a band other than the band other than the 10.7 GHz band or the band used for transmitting and receiving the actual UWB data even within 3.1 GHz to 10.7 GHz.

The reception of the power induction signal is preferably controlled to be performed by an antenna other than the antenna used to transmit and receive UWB data in the UWB wireless terminal.

Thereafter, power is induced based on the power induction signal received in step S110 (S120).

Step S120, which is a power induction step, may first be configured to shape the power induction signal received in step S110, and then rectify the shaped power induction signal and convert it into DC power. That is, after passing only a required band of power induction signals and removing signals in other bands, the power induction signal in the form of a passed AC signal is rectified to a DC power source suitable for use in a UWB wireless terminal.

In this case, the method may further include maintaining the output level of the converted DC power supply at a constant level. That is, since the output level of the rectified DC power supply may change due to a change in signal magnitude when the power induction signal is received, buffering is performed to maintain the output level of the DC power supply.

In addition, the voltage level can be adjusted to match the output level of the converted DC power source to the power level of the UWB wireless terminal. That is, if there is a difference between the output level of the converted DC power supply and the power level used by the UWB wireless terminal, this is matched.

In addition, charging may be performed based on the converted DC power supply. That is, even after charging the induced DC power once, it is possible to operate the UWB wireless terminal according to the present invention even when power induction cannot be performed because the power induction signal is not received.

Thereafter, the power induced in step S120 is supplied to the UWB wireless terminal (S130).

Through the power supply method of the UWB wireless terminal according to the present invention it is possible to efficiently supply power to the UWB wireless terminal.

The present invention also provides a computer-readable recording medium having recorded thereon a program for realizing each step of the power supply method of the UWB wireless terminal according to the present invention described above.

However, the description of the computer-readable recording medium will be omitted since it overlaps with the power supply method of the UWB wireless terminal according to the present invention and the UWB wireless terminal according to the present invention described with reference to FIGS.

Although the configuration of the present invention has been described in detail, it is only for illustrating the present invention, and the protection scope of the present invention is not limited thereto, and the protection scope of the present invention is defined through the description of the claims.

As described above, according to the present invention, in order to supply power to a UWB wireless terminal that performs wireless communication of data in the UWB communication method, a wireless signal for power induction is derived from a band other than the UWB transmission / reception band, and power is induced. By providing the supplied power to the UWB wireless terminal, it is possible to improve the inconvenience of charging the battery for the operation of the conventional UWB wireless terminal.

Claims (16)

A first antenna for transmitting and receiving radio signals for communication of UWB data; A data transceiver configured to transmit and receive the UWB data based on the first antenna; A second antenna for wirelessly receiving a power induction signal; A power induction unit for inducing power based on the power induction signal and supplying the power to the data transceiver UWB wireless terminal comprising a. The method of claim 1, And the power induction signal is received at the second antenna using an ISM band. The method of claim 1, The power induction signal is a UWB wireless terminal that is received at the second antenna using a band other than the band used for transmitting and receiving the UWB data. The method of claim 1, wherein the power induction unit, A waveform shaping unit for shaping the power induction signal; Rectifier for rectifying the output of the waveform shaping unit to convert to a DC power source UWB wireless terminal comprising a. The method of claim 4, wherein A power buffer unit for maintaining an output level of the DC power supply of the rectifier unit at a constant level It further comprises a UWB wireless terminal. The method of claim 4, wherein A voltage level adjusting unit for adjusting a voltage of the output level such that an output level of the DC power supply of the rectifying unit is suitable for a power level of the data transmitting / receiving unit It further comprises a UWB wireless terminal. The method of claim 4, wherein A power charger configured to perform charging based on the DC power of the rectifier It further comprises a UWB wireless terminal. The method of claim 4, wherein The waveform shaping unit is a UWB wireless terminal that is a band pass filter for receiving only the signal of the ISM band and remove the signal of the other band. As a power supply method for a UWB wireless terminal, (a) wirelessly receiving a power induction signal transmitted from the outside using a band other than a band used for transmitting and receiving UWB data in the UWB wireless terminal; (b) inducing power based on the power induction signal; (c) supplying the induced power to the UWB wireless terminal Power supply method of the UWB wireless terminal comprising a. The method of claim 9, The power induction signal is a power supply method of the UWB wireless terminal that is transmitted using the ISM band. The method of claim 9, wherein step (a) comprises (a-1) receiving the power induction signal from an antenna for receiving the power induction signal Power supply method of a UWB wireless terminal comprising a. The method of claim 9, wherein step (b) comprises (b-1) shaping the power induction signal; (b-2) rectifying the shaped power induction signal into a DC power source Power supply method of a UWB wireless terminal comprising a. The method of claim 12, wherein step (b) comprises: (b-3) maintaining the output level of the converted DC power supply at a constant level It further comprises a power supply method of the UWB wireless terminal. The method of claim 12, wherein step (b) comprises: (b-4) adjusting the voltage of the output level such that the converted output power level of the DC power source matches the power level of the UWB wireless terminal; It further comprises a power supply method of the UWB wireless terminal. The method of claim 12, wherein step (b) comprises: (b-5) performing charging based on the converted DC power supply It further comprises a power supply method of the UWB wireless terminal. A computer-readable recording medium having recorded thereon a program for realizing each step of the power supply method for a UWB wireless terminal according to any one of claims 9 to 15.

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