KR20060056450A - Wake-up system using delay - Google Patents

Abstract

The present invention relates to a wake-up system applied to products for home automation, factory automation, etc.

The wake-up system using the delay of the present invention is implemented by applying a passive correlator having the same structure to a transmitter and a receiver, and synthesizing a wake-up signal including a plurality of pulse signals after a delay at intervals of a pulse signal at a receiver. As a result, the receiver may wake up in response to the wake-up signal transmitted from the transmitter at low power.

Radio Transceiver, Wake-Up, Coralation, Matched SAW Filter, Time Switch, Delay

Description

Wake-up system using delay {WAKE-UP SYSTEM USING DELAY}

1 is a configuration diagram of a wake-up system of a conventional radio transceiver.

2 is a block diagram of a wake-up system according to the present invention.

3 is a configuration diagram of the first and second passive correlators of the present invention.

4 is a waveform diagram illustrating a wakeup signal for explaining an operation of a delay unit according to the present invention.

Explanation of symbols on the main parts of the drawings

110: wake-up signal generation unit 120: first manual correlator

210: second manual correlator 220: time switch

230: delay unit 240: AC / DC converter

250: wake-up switching unit 260: control unit

ANT1: transmitting antenna ANT2: receiving antenna

SW1: first switch SW2: second switch

PS: Power

The present invention relates to a wakeup system applied to a product for home automation, factory automation, and the like. In particular, a wake-up system including a plurality of pulse signals in a receiver by applying a passive correlator having the same structure to a transmitter and a receiver, respectively, The present invention relates to a wake-up system using a delay that enables a receiver to wake up in response to a wake-up signal transmitted from a transmitter at low power by implementing the signal to be synthesized after delaying at intervals of pulse signals.

In general, as the utility of wireless communication increases, various types of connection networks in which wires and wireless are integrated are being constructed, and thus, requirements for technical specifications in the field of low-speed, low-cost, low-power wireless communication are being raised.

One of the methods for implementing such a low power is to operate in a power saving mode in which the user wakes up with a wake-up signal in the sleep mode. However, in order to wake up by the wakeup signal, an operation for periodically checking whether the wakeup signal is received and whether the received wakeup signal is its own wakeup signal should be performed.

As described above, for the confirmation operation required for wake-up, many active elements and circuits must be operated, and thus a lot of power consumption is required, and this power consumption needs to be reduced.

One of such wake-up systems of the wireless transceiver will be described with reference to FIG.

1 is a configuration diagram of a wake-up system of a conventional radio transceiver.

Referring to FIG. 1, a conventional wake-up system of a wireless transceiver includes a transmission controller 10 for controlling a wake-up of a receiver, and a transmission processor for generating and transmitting a wake-up signal under the control of the transmission controller 10. 20) and the reception control unit 40 which repeatedly switches from the sleep mode to the standby mode to control whether the user receives the wakeup signal and determines whether the received signal is his or her signal to control the wakeup. And a receiving processor 30 which receives the received signal under the control of the receiving controller 40 and performs a predetermined signal processing and provides the received signal to the receiving controller 40.

In the conventional wake-up process in the wireless transceiver, when the transmission controller 10 controls the transmission of the wake-up signal, the transmission processor 20 generates and transmits the wake-up signal.

In this case, when the reception control unit 40 switches from the sleep mode to the standby mode and controls the confirmation of the wake-up signal, the signal received by the reception processing unit 30 is amplified and filtered and received through the demodulation process. It checks whether the signal is its own wake-up signal. If it is its wake-up signal, it wakes up, and if it is not its wake-up signal, it repeatedly performs the operation of going back to the sleep mode.

As described above, the conventional wake-up system of the wireless transceiver has a problem in that power consumption is high because active elements such as a mixer or an oscillator and a circuit must be operated in order to wake up the signal and perform signal processing such as demodulation.

The present invention has been proposed to solve the above problems, and an object thereof is to apply a passive correlator having the same structure to a transmitter and a receiver, respectively, and in a receiver, a wake-up signal including a plurality of pulse signals is divided into pulse intervals The present invention provides a wake-up system using a delay that enables a receiver to wake up in response to a wake-up signal transmitted from a transmitter at low power.

In order to achieve the above object of the present invention, the wake-up system using the delay of the present invention

In a wake-up system consisting of a transmitter and a receiver,

The transmitter,

A wake-up signal generator for generating a wake-up signal including a plurality of pulse signals having a preset time interval;

A first passive correlator for correlating and encoding the wakeup signal; And

A transmission antenna for wirelessly transmitting a transmission signal encoded by the first passive correlator,

The receiver,

A receiving antenna for receiving a signal from the transmitting antenna;

A power supply unit supplying first and second power sources;

A second passive correlator structurally matched with the first passive correlator and correlating and decoding the received signal from the receiving antenna;

An input terminal connected to the second passive correlator and a plurality of output terminals, receiving first power from the power supply unit, and sequentially switching the input terminals to a plurality of output terminals at a predetermined time interval; A time switch for outputting a signal from the second passive correlator;

A delay unit configured to delay and synthesize signals from each of the plurality of output terminals of the time switch by a predetermined time;

An AC / DC converter converting a signal from the delay unit into a DC switching voltage; And

A wake-up switching unit which is turned on / off according to a DC switching voltage output from the AC / DC converter, and supplies a second power supply from the power supply unit to a wake-up voltage of the receiver.

Wake-up system using a delay, characterized in that it comprises a.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

2 is a block diagram of a wake-up system according to the present invention.

Referring to FIG. 2, a wakeup system using a delay according to an embodiment of the present invention includes a transmitter and a receiver. The transmitter includes a wakeup signal SWK including a plurality of pulse signals having a predetermined time interval T1. A wake-up signal generation unit 110 for generating a signal, a first passive correlator 120 for correlating and encoding the wake-up signal SWK, and transmission encoded by the first manual correlator 120. And a transmit antenna ANT1 for wirelessly transmitting the signal.

The receiver includes a receiving antenna ANT2 for receiving a signal from the transmitting antenna ANT1, a power supply unit PS for supplying first and second power supplies V1 and V2, and the first passive correlator ( A second passive correlator 210 that is structurally matched to 120 and correlates and decodes the received signal from the receiving antenna ANT2, and an input terminal IN connected to the second passive correlator 210; And a plurality of output terminals OUT1 to OUTn, and are supplied with the first power source V1 from the power supply unit PS, and the input terminal IN is connected to the plurality of output terminals OUT1 at a predetermined time interval T1. Time switch 220 to sequentially switch in the order set in advance in the " OUTn " to output a signal from the second manual correlator 210, and a signal from each of a plurality of output terminals of the time switch 220. Delay unit 230 for delaying and synthesizing by a predetermined time and AC / DC converter 240 for converting the signal from the delay unit 230 to a DC switching voltage, and on / off switching in accordance with the DC switching voltage output from the AC / DC converter 240, It includes a wake-up switching unit 250 for supplying a second power supply (V2) from the power supply unit PS to the wake-up voltage of the receiver.

In addition, the receiver of the wake-up system of the present invention, when the wake-up voltage is supplied through the wake-up switching unit 250, the control unit 260 for supplying the first and second switching signals from the control unit 260 According to the first switching signal (SS1) of the first switch (SW1) for turning off the first power supply (V1) supplied from the power supply unit (PS) to the time switch 220, and the receiving antenna (ANT2) and A second switch connecting the second passive correlator 210 at all times and connecting the receiving antenna ANT2 and the receiving signal processor 270 according to the second switching signal SW2 from the controller 260. SW2) is further included.

The wakeup signal generator 110 may include a signal generator 111 that generates the wakeup signal, and a power amplifier 112 that amplifies a signal from the signal generator 111 into power required for transmission. Include.

3 is a configuration diagram of the first and second passive correlators of the present invention.

Referring to FIG. 3, the first and second passive correlators 120 and 210 are formed of matched SAW filters having the same structure that are structurally matched with each other. Such matched SAW filters are matched SAWs formed on piezoelectric plates. The matched SAW filter includes a SAW input electrode unit 321 for converting an input signal Sin to SAW, and a SAW signal from the SAW input electrode unit 321 to correlate and encode or decode the SAW input electrode unit 321. An encoding / decoding electrode unit 322 and a SAW output electrode unit 323 for converting the SAW signal from the electrode unit 322 into an electrical signal to provide an output signal Sout.

Here, the electrode portion 322 is parallel to the first electrode 322A at a predetermined distance from the first electrode 322A and the first electrode 322A formed of a predetermined conductive linear pattern on the piezoelectric plate. A second electrode 322B formed of a predetermined conductive pattern, a plurality of first electrode fingers f1 formed of a conductive pattern connected to the first electrode 322A and formed in the direction of the second electrode 322B, and A plurality of second electrode fingers f2 connected to a second electrode 322B and formed of a conductive pattern formed in a direction of the first electrode 322A, and the first and second electrode fingers f1 and f2 It is composed of a comb-tooth structure meshed with each other, each of the first electrode finger f1 and the second electrode finger f2 corresponding thereto is composed of a plurality of pairs of encoding / decoding electrodes (ce11 ~ ce14).

In addition, the delay unit 230 is connected to each of the plurality of output terminals OUT1 to OUTn of the time switch 220, and each signal from the time switch 220 is an integer multiple of a predetermined time T1. A plurality of signal delay units SD1 to SDn for delaying each, and a combining unit Σ for synthesizing signals from the plurality of signal delay units SD1 to SDn and outputting them to the AC / DC converter 240. In addition, the plurality of signal delay units SD1 to SDn are configured to shorten the delay time sequentially according to the switching-on order of the output terminals OUT1 to OUTn and the input terminal IN of the time switch 220.

4 is a waveform diagram illustrating a wakeup signal for explaining an operation of a delay unit according to the present invention.

In Fig. 4, SWK is a wakeup signal, which includes a plurality of pulse signals having a preset time interval. The SSD1, SSD2, and SSD3 show respective delays of the pulse signals by the three first to third signal delay units SD1 to SD3.

Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2, in the wakeup system of the present invention, first, a wakeup signal generator 110 of a transmitter generates a wakeup signal SWK, which is generated by the wakeup signal generator 110. The wakeup signal SWK is a pulse having a plurality of pulses having a preset time.

Specifically, the signal generator 111 of the wakeup signal generator 110 generates a wakeup signal, and the wakeup signal is amplified by the power amplifier 112 to power necessary for transmission.

Next, referring to FIGS. 2 and 3, in the first passive correlator 120 of the present invention, the wake-up signal SWK is correlated and encoded, and the encoded transmission signal STX is a transmission antenna ( Wireless transmission via ANT1).

Here, since the wakeup signal is encoded by the first passive correlator 120, when the correlator having the same structure is applied to the receiver, the receiver can decode the wakeup signal.

Referring to FIGS. 2 and 3, the first passive correlator 120 will be described in detail. When the first passive correlator 120 includes a matched SAW filter as shown in FIG. 3, The wakeup signal SWK from the wakeup signal generating unit 110 is converted into a SAW signal by the SAW input electrode unit 321, and then the electrode unit 322 is separated from the SAW input electrode unit 321. SAW signals are correlated and encoded. Thereafter, the SAW signal from the encoding / decoding electrode unit 322 is converted into an electrical signal by the SAW output electrode unit 323 and output to the transmission antenna ANT1.

Herein, the encoding process of the first passive correlator 320 will be described. A plurality of electrode pairs CE11 to CE14 of the SAW filter matched with the signal input by the first passive correlator 120 according to the present invention. Is encoded according to. For example, a case where the second electrode finger f2 is disposed after the first electrode finger f1 is referred to as "1", and the opposite arrangement is referred to as "0", where the encoding / decoding electrode of FIG. The unit 322 performs encoding with "0,1,0,0".

As described above, a description will be given of a process in which the receiver, which receives the wakeup signal transmitted from the transmitter, wakes up.

2 and 4, a signal transmitted from the transmitting antenna ANT1 is received through the receiving antenna ANT2, and at this time, the second correlator 210 of the present invention is received from the receiving antenna ANT2. Correlate and decode the received signal.

For example, when the first passive correlator 120 and the second passive correlator 210 have the same structurally matched structure, the second manual correlator 210 may be configured as the first passive correlator ( The signal encoded by 120 may be normally decoded.

2 and 3, the second manual correlator 210 will be described in detail. In FIG. 3, the signal input from the second manual correlator 210 is a SAW input electrode unit 321. The SAW signal is converted into an SAW signal, and then the encoding / decoding electrode unit 322 correlates the SAW signal from the SAW input electrode unit 321 with the same correlation as that of the encoding / decoding electrode unit 322. Decode by running Thereafter, the SAW signal from the encoding / decoding electrode unit 322 is converted into an electrical signal by the SAW output electrode unit 323.

Here, the decoding process of the second passive correlator 210 will be described. The signal input by the second passive correlator 210 of the present invention is input to the plurality of electrode pairs CE11 to CE14 of the matched SAW filter. For example, when the second electrode finger f2 is disposed after the first electrode finger f1, the first electrode finger f1 is referred to as "1", and the opposite arrangement is referred to as "0". The decoding electrode unit 222 performs decoding with "0,1,0,0", which matches the encoding in the first passive correlator 120.

Next, the time switch 220 of the present invention receives the first power source V1 from the power supply unit PS and is input through the input terminal IN connected to the second manual correlator 210. , And outputs to one of the plurality of output terminals OUT1 to OUTn, wherein the time switch 220 sequentially switches the input terminal IN to one of the plurality of output terminals OUT1 to OUTn, and at this time, The switching time is a preset time T1 interval, which is equal to the time interval of the pulse signal included in the wakeup signal.

Accordingly, the time switch 220 outputs the signal from the second manual correlator 210 to the plurality of output terminals while changing the output terminal at the time interval through the input terminal IN. For example, the time switch 220 sequentially switches the input terminal IN at a predetermined time interval to the output terminals OUT1, OUT2, OUT3, .., OUTn-1, and OUTn, where a predetermined time is set. Is equal to the interval of the plurality of pulse signals included in the wake-up signal.

Next, the delay unit 230 of the present invention delays and synthesizes the signals from each of the plurality of output terminals of the time switch 220 by a predetermined time, that is, the plurality of signal delays of the delay unit 230. The units SD1 to SDn are connected to a plurality of output terminals of the time switch 220, respectively, to delay the signal from the time switch 220 by an integer multiple of a preset time T1, and thereafter, the delay. The synthesizing unit Σ of the unit 230 synthesizes the signals from the plurality of signal delay units SD1 to SDn and outputs the synthesized signals to the AC / DC converter 240. Here, the integer multiple of the time T1 corresponds to one time T1 of T1, two times T2 of T1, three times T3 of T1, and so on, which is the time interval of the pulse signal.

In detail, referring to FIG. 4, the plurality of signal delay units SD1 to SDn are configured to shorten a delay time step by step, and the delay unit 230 includes three first to third signals. When the delay units SD1 to SD3 are included, the first signal delay unit SD1 delays by three times the time T3 of the time interval T1 of the pulse signal, and the second signal delay unit SD2 The second signal delay unit SD3 delays by one time T1 of the time interval T1 of the pulse signal, and the third signal delay unit SD3 delays by one time T1 of the time interval T1 of the pulse signal.

As described above, since the pulse signal is output in phase synchronization at the same time point by the delay of each signal delay unit, when these signals are synthesized by the combining unit Σ, a large signal is output as shown in FIG.

Next, the AC / DC converter 300 of the present invention converts the signal from the delay unit 230 into a DC switching voltage VSW, where the DC switching voltage VSW is a sufficient magnitude necessary for switching. Becomes the voltage of.

Next, the wake-up switching unit 250 is switched on according to the DC switching voltage VSW output from the AC / DC converter 240 to receive the second power supply V2 from the power supply unit PS. Output at the wake voltage of.

As described above, in the wake-up system of the present invention, decoding of the receiver is performed by matching the encoding process of the transmitter, and the decoded signal synthesizes a plurality of pulse signals of the same phase by a time switch and a delay unit, The signal output from the delay unit 230 of the present invention is output as a large signal necessary for switching for wake-up, and this large signal is converted into a DC switching voltage (VSW) as described above to turn on the switching unit. The receiver wakes up by powering up the receiver.

In addition, the control unit 260 of the receiver according to the present invention may provide the first and second switching signals SS1 and SS2 when the second power supply V2 is supplied to the wakeup voltage through the wakeup switching unit 250. Supply to the 1st and 2nd switches SW1 and SW2, respectively. Accordingly, the first switch SW1 turns off the first power V1 supplied from the power supply unit PS to the time delay unit 220 according to the first switching signal SS1 to turn off the time switch 220. ) Is stopped.

At the same time, the second switch SW2 receives the state in which the reception antenna ANT2 and the time switch 220 are always connected to each other according to the second switching signal SS2 from the controller 260. After switching to the connection state between the antenna ANT2 and the reception signal processing unit 270, a signal from the reception antenna ANT2 is input to the reception signal processing unit 270 to perform reception processing.

According to the present invention as described above, it is possible to apply a correlator matched to each transceiver, and to wake up by providing a signal having a large size by equalizing the phase of the plurality of pulse signals through the delay, The power consumption for the up can be lowered.

According to the present invention as described above, in the wake-up system applied to products for home automation, factory automation, etc., each of the passive correlator having the same structure is applied to the transmitter and the receiver, and the receiver includes a plurality of pulse signals. By implementing the wake-up signal to be synthesized after the delay at intervals of the pulse signal, the receiver can wake up in response to the wake-up signal transmitted from the transmitter at low power.

Claims (6)

In a wake-up system consisting of a transmitter and a receiver, The transmitter, A wake-up signal generator 110 for generating a wake-up signal SWK including a plurality of pulse signals having a predetermined time interval T1; A first passive correlator (120) for correlating and encoding the wakeup signal (SWK); And A transmission antenna ANT1 for wirelessly transmitting a transmission signal encoded by the first passive correlator 120, The receiver, A receiving antenna (ANT2) for receiving a signal from the transmitting antenna (ANT1); A power supply unit PS supplying first and second power supplies V1 and V2; A second passive correlator 210 structurally matched with the first passive correlator 120 and correlating and decoding the received signal from the receiving antenna ANT2; An input terminal IN connected to the second passive correlator 210 and a plurality of output terminals OUT1 to OUTn, and receive a first power V1 from the power supply unit PS, and receive the input terminal IN. ) Is sequentially switched to a plurality of output terminals (OUT1 ~ OUTn) in a predetermined order at intervals of a predetermined time (T1), the time switch 220 for outputting the signal from the second manual correlator 210 ); A delay unit 230 for delaying and synthesizing signals from each of the plurality of output terminals of the time switch 220 by a predetermined time; An AC / DC converter 240 for converting a signal from the delay unit 230 into a DC switching voltage; And A wake-up switching unit which is switched on / off according to a DC switching voltage output from the AC / DC converter 240 to supply a second power supply V2 from the power supply unit PS to a wakeup voltage of a receiver. 250) Wake-up system using a delay, characterized in that it comprises a. The system of claim 1, wherein the receiver of the wake up system is A controller 260 for supplying first and second switching signals when a wake-up voltage is supplied through the wake-up switching unit 250; A first switch (SW1) for turning off the first power (V1) supplied from the power supply (PS) to the time switch (220) according to the first switching signal (SS1) from the controller (260); And The receiving antenna ANT2 and the second passive correlator 210 are always connected, and the receiving antenna ANT2 and the receiving signal processor 270 according to the second switching signal SW2 from the controller 260. Second switch (SW2) connecting the Wake-up system using a delay, characterized in that it further comprises. The wakeup signal generating unit 110 of claim 1, A signal generator 111 generating the wakeup signal; And Power amplifier 112 for amplifying the signal from the signal generator 111 to the power required for transmission Wake-up system using a delay, characterized in that it comprises a. The method of claim 1 wherein the first manual correlator is Wake-up system using a delay, characterized in that consisting of a matched SAW filter. The method of claim 4, wherein the second manual correlator is And a matched SAW filter structurally matched with the first passive correlator. The method of claim 1, wherein the delay unit 230 A plurality of signal delay units SD1 connected to a plurality of output terminals OUT1 to OUTn of the time switch 220 and respectively delaying a signal from the time switch 220 by an integer multiple of a preset time T1. ~ SDn); And A synthesizer Σ for synthesizing signals from the plurality of signal delay units SD1 to SDn and outputting the synthesized signal to the AC / DC converter 240; The plurality of signal delay units SD1 to SDn may be configured so that delay times are sequentially shortened according to the switching-on order of the output terminals OUT1 to OUTn and the input terminal IN of the time switch 220. Wake-up system.

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