KR20100089433A - Electronic tag including the mode convertible function and base station device using the tag - Google Patents

Abstract

PURPOSE: An electronic tag of a mode switching type and an electronic tag recognition device of the mode switching type are provided to perform communication with the electronic tag of the mode switching type and a different kind frequency band. CONSTITUTION: A low frequency band guide receiver(551) receives a signal of a low frequency band emitted from an electronic tag recognition device of a mode switching type. A Zigbee communication unit(552) changes a current mode into an active mode in response to wake up information included in the signal of the low frequency band in a power-saving mode state. The Zigbee communication unit performs Zigbee communication with the electronic tag recognition device of the mode switching type in the active mode state. A semi-active communication unit(561) performs communication with the electronic tag recognition device of the mode switching type using the frequency signal of 900MHz band.

Description

Electronic tag recognition mode and mode station electronic tag recognition device {Electronic tag including the mode convertible function and base station device using the tag}

The present invention relates to an electronic tag and an electronic tag recognition device, and in particular, having a semi-active communication unit using a frequency signal of the 900MHz band can check its position from time to time, and the mode switching method of the electronic tag of the power consumption is reduced to a minimum And a mode switching method of an electronic tag recognizing apparatus for performing communication with the mode switching type electronic tag and a heterogeneous frequency band.

ZigBee, a wireless personal area network technology, has been standardized in IEEE 802.15.4 as a personal wireless network standard for home automation and data based on 2.4 GHz (Giga Hertz). Compared to other wireless private network technologies such as Bluetooth (Blue tooth) and Ultra Wide Band (UWB), ZigBee offers the lowest cost of chipsets due to its low power consumption and simplicity of wireless transceiver. Short range wireless communication technology.

1 shows an example of a configuration of a wireless communication network using Zigbee.

Referring to FIG. 1, a wireless communication network using ZigBee includes a network coordinator 11 and a plurality of devices 12 that transmit and receive data wirelessly with the network coordinator 11. The network coordinator 11 is provided to a main control device of a computer or a home network to control data transmission and reception with a plurality of devices 12. The plurality of devices 12 refers to a ventilator, an air conditioner, a security device, a lamp, and various sensors.

In the short range wireless private network using Zigbee, the network coordinator 11 transmits a beacon to the plurality of devices 12 at a predetermined time interval. At this time, the interval between the beacons may be a minimum of 15 ms (milli seconds) to a maximum of 245 ms.

2 shows an example of a beacon used in a short range wireless private network using a Zigbee.

Referring to FIG. 2, there are 16 time slots between a beacon and a beacon. The 16 time slots are divided into a connection contention section in which a plurality of devices 12 compete with each other for connection with the network coordinator 11, and a contention-free section allocated to a single device requiring a specified bandwidth or low processing delay. At this time, a time slot allocated to a predetermined device is referred to as a guaranteed time slot (GTS). In order to minimize the power consumption, the device 12 operates in a power saving mode. The device 12 checks whether there is data to be transmitted or received between the device 12 and the network coordinator 11 at every beacon period.

In the conventional wireless communication network using Zigbee, there is a problem that unnecessary power consumption occurs because the device 12 periodically wakes up and consumes power in a power saving mode to check whether data is transmitted or received. In order to solve the problem of unnecessary power consumption, a wake-up method of the Zigbee terminal (Korean Patent Publication No. 10-2006-31477) has been proposed. The present invention allows the Zigbee device to release the power saving mode only when there is data to be transmitted and received, thereby enabling data transmission and reception without delay and minimizing unnecessary power consumption.

Since the present invention wakes up the Zigbee terminal using the GTS, it can be used only in an environment in which the GTS can be used.

RFID (Radio Frequency Identification) system, which appeared in the 1980s, is a non-contact radio frequency identification system that attaches to various items and transmits and processes information of objects and surrounding environment information at radio frequency. The RFID system consists of a reader with a read / decode function, an RFID tag with unique information, operating software, and a network.The RFID system reads radio waves from a thin flat electronic tag attached to an object. Process the information by identifying it.

The electronic tag consists of a transponder chip made of semiconductor and an antenna, and there are passive and active type. In contrast to the passive type of energy supplied from the radio signal of the reader without the internal power supply, the active type can be operated by a separate battery built-in. The electronic tag has different recognition distances, applications, recognition speeds, and tag sizes for each band of frequencies used to communicate with the base station.

3 shows electrical characteristics of an electronic tag for each frequency band.

Referring to FIG. 3, an electronic tag using a low frequency band (125KHz to 134KHz) frequency signal is applied to proximity security, FA, animal management, and vehicle locking device. Electronic tag using high frequency band signal (13.56MHz) is applied to the field of transportation card, library and inventory management. Electronic tags using frequency signals in the Ultra-High Frequency (UHF) band (860 MHz to 930 MHz) are used in areas such as pallet tracking, international logistics SCM (supply chain management), inventory management, production management and baggage tracking. Apply. Electronic tags using frequency signals in the ultra-high frequency band (2.45 GHz to 5.8 GHz) are applied to applications such as SCM and highway toll gates. As the frequency used increases, the recognition speed increases and the size of the tags decreases. The performance of the electronic tag shown in FIG. 1 was created based on the passive electronic tag.

FIG. 4 shows advantages and disadvantages of the frequency bands shown in FIG. 3.

3 and 4, the low frequency band (125KHz ~ 134KHz) of the electronic tag has the advantage that there is no problem in the electronic standards / electromagnetic protection standards and are not affected by metal objects, but the data transmission rate is very slow and The size has a big disadvantage. The high frequency band (13.56MHz) of the electronic tag has the advantage that the tag size and price is reasonable, but in the shaded area it is difficult to transmit and receive data and has a short recognition distance. The electronic tag of the UHF band (860MHz ~ 930MHz) has a long recognition distance, the size of the tag is large, it is difficult to manufacture a product that satisfies all radio regulations different from country to country. The electronic tag of the ultra high frequency band (2.45 GHz ~ 5.8 GHz) has the advantages of small size, cheap price and high transmission speed, but there is a disadvantage that the recognition distance is less than 1m due to the limitation of the radio wave standard / electromagnetic wave protection standard.

In addition, in the conventional wireless communication network using Zigbee, in order to continuously identify the location of the user who has the electronic tag, the Zigbee communication must be continuously performed between the electronic tag and the electronic tag recognition device, but in this case, the power consumption increases. This causes a problem of falling resolution.

On the other hand, when performing periodic communication at regular intervals, when the holder of the electronic tag is out of the recognition range of the electronic tag recognition device during the period of not performing the Zigbee communication, there is a problem that the location of the electronic tag holder cannot be determined.

An object of the present invention is to provide an electronic tag of the mode switching method having an ultra low power standby state.

Another technical problem to be achieved by the present invention is to propose an electronic tag recognition apparatus of a mode switching method for performing communication in the mode switching electronic tag and heterogeneous frequency band.

Another technical problem to be achieved by the present invention is to provide an electronic tag of the mode switching method and the electronic tag recognition device of the mode switching method, and the mode switching method of the electronic switching mode to check the position of the user of the mode switching method A tag recognition system is proposed.

The electronic tag of the mode switching method according to an aspect of the present invention for achieving the technical problem is provided with a low frequency band induction receiver, a Zigbee communication unit and a semi-active communication unit. The low frequency band induction receiver receives a signal of a low frequency band radiated from a mode tag type electronic tag recognition device. The Zigbee communication unit converts to the active mode in response to the wake-up information included in the signal of the low frequency band in the power saving mode state, and in the active mode state by using the mode tag type electronic tag recognition device and the 2.4GHz frequency signal Perform Zigbee communication. The semi-active communication unit communicates with the mode tag type electronic tag recognition device by using the frequency signal of the 900MHz band radiated from the mode tag type electronic tag recognition device.

 The electronic tag of the mode switching method according to an aspect of the present invention for achieving the technical problem is provided with a low frequency band induction receiver, a Zigbee communication unit and a semi-active communication unit. The low frequency band induction receiver receives a signal of a low frequency band radiated from a mode tag type electronic tag recognition device. The Zigbee communication unit is converted to the active mode in response to the wake-up information included in the signal of the low frequency band in the power saving mode state, and in the active mode state of the electronic tag recognition device of the mode switching method of 430 to 440MHz or 894 to 942MHz Zigbee communication is performed using a frequency signal. The semi-active communication unit communicates with the mode tag type electronic tag recognition device by using the frequency signal of the 900MHz band radiated from the mode tag type electronic tag recognition device.

The electronic tag of the mode switching method according to an aspect of the present invention for achieving the technical problem is provided with a low frequency band induction receiver, a Zigbee communication unit and a semi-active communication unit. The low frequency band induction receiver receives a signal of a low frequency band radiated from a mode tag type electronic tag recognition device. The Zigbee communication unit converts to the active mode in response to the wake-up information included in the signal of the low frequency band in the power saving mode state, and in the active mode state by using the mode tag type electronic tag recognition device and the 2.4GHz frequency signal Zigbee communication is performed or Zigbee communication is performed using a frequency signal of 430 to 440 MHz or 894 to 942 MHz. The semi-active communication unit communicates with the mode tag type electronic tag recognition device by using the frequency signal of the 900MHz band radiated from the mode tag type electronic tag recognition device.

An apparatus for recognizing an electronic tag of a mode switching method according to the present invention for achieving another technical problem includes a Zigbee communication module, a low frequency band induction transmitter, an MCU, and a 900 MHz band frequency signal transceiver. The Zigbee communication module performs Zigbee communication using a mode switching electronic tag and a frequency signal of 2.4 GHz. The low frequency induction transmitter transmits a low frequency band signal. The MCU authenticates the electronic tag of the mode switching method and provides various services to the holder of the electronic tag of the mode switching method. The 900MHz band frequency signal transceiver transmits a 900MHz band frequency signal to the mode switching electronic tag.

An apparatus for recognizing an electronic tag of a mode switching method according to the present invention for achieving another technical problem includes a Zigbee communication module, a low frequency band induction transmitter, an MCU, and a 900 MHz band frequency signal transceiver. The Zigbee communication module performs Zigbee communication using a mode switching electronic tag and a frequency signal of 430 to 440 MHz or 894 to 942 MHz. The low frequency induction transmitter transmits a low frequency band signal. The MCU authenticates the electronic tag of the mode switching method and provides various services to the holder of the electronic tag of the mode switching method. The 900MHz band frequency signal transceiver transmits a 900MHz band frequency signal to the mode switching electronic tag.

An apparatus for recognizing an electronic tag of a mode switching method according to the present invention for achieving another technical problem includes a Zigbee communication module, a low frequency band induction transmitter, an MCU, and a 900 MHz band frequency signal transceiver. The Zigbee communication module performs Zigbee communication using a mode switching mode electronic tag and a 2.4 GHz frequency signal, or performs Zigbee communication using a frequency signal of 430 to 440 MHz or 894 to 942 MHz. The low frequency induction transmitter transmits a low frequency band signal. The MCU authenticates the electronic tag of the mode switching method and provides various services to the holder of the electronic tag of the mode switching method. The 900MHz band frequency signal transceiver transmits a 900MHz band frequency signal to the mode switching electronic tag.

According to another aspect of the present invention, there is provided a mode switching method of an electronic tag recognition system, including a mode switching mode of an electronic tag, a mode switching mode of an electronic tag recognition apparatus, a wall pad, and a server. The mode tag type electronic tag stores user information and outputs the same, and includes a semi-active communication unit which communicates with the mode tag type electronic tag recognition device using a frequency signal of 900 MHz band, and a power saving mode and an active mode. It has a Zigbee communication unit that operates in. The mode tag type electronic tag recognition apparatus authenticates the mode tag type electronic tag holder by using the user information, performs communication with the semi-active communication unit, and provides various services to the mode tag type electronic tag holder. to provide. The wall pad provides a service to the user or outputs the information as it is, using information on the mode tag holder of the electronic tag received from the electronic tag recognition device. The server provides the service to the user or other users related to the user by using the user information transmitted via the wall pad. Herein, the mode tag type electronic tag recognition device transmits a wake up signal using a signal of a low frequency band, and the mode tag type electronic tag switches from a power saving mode to an active mode when the wake up signal is enabled. The user information stored in the electronic tag and the information on the reception strength of the signal of the low frequency band are transmitted to the electronic tag recognition apparatus of the mode switching method.

The electronic tag and the electronic tag recognition apparatus of the mode switching method according to the present invention has the advantage that it can be used for a long time because the ultra low power standby is possible by applying low frequency band communication. In addition, it solves the problems of the electromagnetic wave human body protection standards and radio standards of the 125KHz low frequency band simultaneously, and can achieve the effect of miniaturization, cost reduction and high transmission speed of the Zigbee communication module.

On the other hand, in addition to 2.4 GHz, Zigbee communication uses 430 to 440 MHz or 894 to 942 MHz frequency signals to further reduce the linearity or attenuation of radio waves, thereby reducing the effects of obstacles and preventing interference from radio waves. have.

In addition, a semi-active communication unit and the 900MHz band frequency signal to communicate with the mode switching method of the electronic tag recognition device has the advantage of being able to check the position of the mode tag electronic tag user from time to time.

The core idea of the present invention is to allow the electronic tag recognition device and the electronic tag to communicate by using signals of at least two different frequency bands. That is, the low frequency band signal is used for transmitting and receiving a wakeup signal instructing to convert the Zigbee module of the electronic tag in the power saving mode into the active mode, and after the Zigbee module is activated by the wakeup signal. It is to perform communication in the same manner as the conventional high-frequency signal.

In addition, a semi-active communication unit that always maintains a wake-up state, characterized in that to check the position of the electronic tag user of the mode switching method at any time.

On the other hand, the present invention relates to a wireless security system provided by using the electronic tag recognition mode of the mode switching method and the mode switching method of the domestic application of the present invention (10-2007-0075692), the Zigbee communication The present invention relates to a frequency signal of a different band.

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

5 is an embodiment of an electronic tag recognition system of a mode switching method according to the present invention.

Referring to FIG. 5, the electronic tag recognition system 500 of the mode switching method according to the present invention includes a server 510, a wall pad 520, an electronic tag recognition device 530 of the mode switching method, and the electronic of the mode switching method. Tag 550.

The mode tag type electronic tag recognition device 530 includes an MCU 531, a low frequency band inductive transmitter 532, a Zigbee communication device 533, a 900 MHz band frequency signal transceiver 536, and an Ethernet communicator 535. .

The mode tag type electronic tag 550 includes a low frequency band induction receiver 551, a Zigbee communication unit 552, and a semiactive communication unit 561. The Zigbee communication unit 552 includes a wake up signal detector 553, a main controller 554, and a Zigbee communication device 555. The electronic tag 550 of the mode switching method may further include a memory 557, a button 558, and a buzzer 559.

Hereinafter, the operation of the electronic tag recognition system 500 of the mode switching method will be described.

Referring to FIG. 5, when the holder of the mode tag type electronic tag 550 approaches within 2 to 3 m (meter) from the mode tag type electronic tag recognition device 530, the electronic tag is recognized by the recognition device 530. By receiving the wake-up information included in the low frequency band signal S1 radiated from the low frequency band induction transmitter 532 through the low frequency band induction receiver 551 to activate the Zigbee communication unit 552 in the power saving mode Process the necessary data. Here, for example, a signal of 125 KHz may be used as the frequency of the signal S1 of the low frequency band. In the case of the signal having a frequency of 125KHz, it has already been mentioned that even when the electronic tag 550 is placed in a container containing a metal object such as a wallet or a basket, communication is possible within 2 to 3m and in particular, the effect on the human body is small. .

The wake up signal detector 553 included in the Zigbee communication unit 552 receives the low frequency band signal S1 through the low frequency band induction receiver 551 and detects the wake up signal included in the low frequency band signal. The mode conversion command signal MC instructing to switch to the active mode is generated and transmitted to the main control device 554. The wake-up signal detector 553 compares the pattern of the signal of the low frequency band with the pre-stored active pattern and enables the mode conversion command signal MC according to the comparison result.

The main control device 554 receiving the mode conversion command signal MC is enabled, thereby activating the Zigbee communication device 555 to intensify the unique information stored in the memory 557 and the signal S1 of the low frequency band. Information about the received signal strength indication (RSSI) is transmitted to the electronic tag recognition device 530 using a 2.4 GHz frequency signal (S2).

At this time, the electronic tag recognition device using the frequency information of 430 to 440 MHz or 894 to 942 MHz is used for the unique information stored in the memory 557 and the information about the received signal strength indication (RSI) of the low frequency band signal S1. In operation 530, it may be transmitted (S2).

As such, when the frequency signal of 430 to 440 MHz or 894 to 942 MHz is used, the linearity or attenuation of the radio wave is less, and thus the influence of the obstacle is small, and the interference problem with the WLAN does not occur.

Although FIG. 5 shows that the main controller 554 is included in the Zigbee communication unit 552 and described as being converted from the power saving mode to the active mode in response to the mode conversion command signal MC, the Zigbee communication unit 552 However, it is also possible to install the electronic tag inside the tag so that it always operates in the active mode.

In the above description, a board on which the low frequency band induction receiver 551, the Zigbee communication unit 552, the memory 557, the button 558, and the buzzer 559 are installed is also referred to as a Zigbee module as a whole.

Meanwhile, the mode switching electronic tag 550 further includes a semi-active communication unit 561 which is always in a wake-up state, so that the mode switching electronic tag 550 is a mode switching electronic tag recognition device 530. If within the recognition range of the mode switching mode of the electronic tag 550 can determine the location of the user at any time.

The semi-active communication unit 561 includes a power supply unit, a control unit, and an antenna unit.

The power supply unit supplies power so that the semi-active communication unit always maintains a wake-up state.

The controller controls its position by using a frequency signal of 900 MHz band emitted from the mode tag type electronic tag recognition device when the mode tag type electronic tag is approached within a predetermined distance from the mode tag type electronic tag recognition device. Check it.

The antenna unit receives a frequency signal of the 900MHz band radiated from the electronic tag recognition device of the mode switching method, and the mode switching to the back scatter (back scatter) method information on its position confirmed by the control unit The transmission is transmitted to the electronic tag recognition device of the scheme (S4).

The back scatter method is one of coupling methods used in RFID tags, and when an electronic tag recognition device sends a signal to the electronic tag, the electronic tag includes a part of energy included in the signal in the electronic tag. And a part of the chip (capacitor) is returned to the electronic tag recognition device.

At this time, the signal reflected from the electronic tag is sent (modulated) by sending the information of the electronic tag on the carrier frequency signal of the electronic tag recognition device, this process is called a backscatter method.

In the present invention, the electronic tag of the mode switching method receives a frequency signal of the 900MHz band radiated from the mode tag type electronic tag recognition device, a part of the energy contained in the signal is charged to the semi-active communication unit and confirmed by the controller It modulates information about its position and transmits the information to the electronic tag recognition device of the mode switching method.

At this time, the semi-active communication unit 561 maintains the wake-up state at all times, and when only the wake-up state is maintained, a minute current of 2 to 3 μm flows. As a result, even when the device is always in the wake-up state, power consumption can be reduced to a minimum, and it can be used for a long time without additional power supply.

On the other hand, when the semi-active communication unit 561 is close to the recognition range of the mode tag type electronic tag recognition device 530, the control unit receives a frequency signal of 900MHz band radiated from the mode tag type electronic tag recognition device 530. Will check its position at this time about 2.5mA current flows.

In addition, since the frequency signal of the 900MHz band is used, when the distance between the mode tag type electronic tag recognition device 530 is within a range of about 40 meters, the user of the mode tag type electronic tag 550 can be checked. do.

The mode-switching electronic tag including the semi-active communication unit 561 is implemented on one chip together with a subscriber identification module (SIM) card and mounted on a mobile phone or another mobile device having a battery. Can be.

The mode switching electronic tag recognizing apparatus 530 transmits the inherent information stored in the mode switching electronic tag 550 transmitted from the mode switching electronic tag 550 and the strength (RSSI) of the signal S1 of the low frequency band. ) Is received through the ZigBee communication apparatus 533, the information is processed and transmitted to the server 510 via the wall pad 520. The Ethernet communicator 535 included in the mode tag type electronic tag recognition device 530 performs external communication with the wall pad 520 and the central server 510 through a communication network (not shown).

In addition, the mode switching electronic tag recognition device 530 radiates a frequency signal of 900 MHz band when the mode switching electronic tag 550 approaches the recognition range of the mode switching electronic tag recognition device 530. Receives information on the user's location of the mode switching electronic tag 550 radiated from the semi-active communication unit 561. (S4)

The wall pad 520 is a wall-mounted home network controller, which replaces a conventional video phone and displays and controls all functions of the home network. The home network refers to a system that not only provides high-speed Internet to information and communication devices such as computers in the house, but also monitors and controls the status of home appliances such as microwave ovens, washing machines, and air conditioners, and performs fire and crime prevention. it means. Although the wall pad 520 is illustrated in FIG. 5, a kiosk may be used in some cases. Kiosks are small structures designed to display information for people passing by, usually with computers and display screens. The kiosk is a structure installed near the entrance of the mall for the purpose of guiding shoppers to the store. The wall pad and kiosk are connected to a central server through a communication network to deliver various events and receive commands from the server.

 The current flowing in the Zigbee communication unit operating using a frequency signal of 2.4 GHz or using a frequency signal of 430 to 440 MHz or 894 to 942 MHz is milli-ampere. In the case of an active electronic tag driven by a power source such as a battery, the Zigbee communication unit in the active mode consumes a lot of power, so it is necessary to change the battery frequently. Therefore, the power saving mode should be operated unless necessary. Since a current of about a few microamps flows in the circuit for transmitting and receiving the signal in the low frequency band, the power consumed by the electronic tag in the power saving mode is insignificant.

The memory 557 of the electronic tag 550 stores various information about a person who uses the electronic tag 550. If necessary, the stored information may be modified under the control of the main controller 554. In this case, the information may be determined according to the area in which the electronic tag recognition system 500 is used, but in general, personal information such as the date of birth required for authenticating the user, the place of residence, and the number of the car, if necessary, Will be the same information.

The Zigbee communication device 555 included in the electronic tag 550 may be forcibly activated in addition to being activated by the mode conversion command signal MC. That is, when the electronic tag 550 is in the power saving mode, the Zigbee communication device 555 changes to the active mode when the user presses the button 558 for a predetermined time or more than the reference pressure. Here, the constant time means a time that can be arbitrarily determined by the user, such as 1 second, 2 seconds, and 3 seconds, and the reference pressure means a predetermined predetermined pressure. In this case, the main controller 554 may detect the time and pressure at which the button is pressed to convert the Zigbee communication device 555 into the active mode.

In FIG. 5, the interval between the electronic tag recognition device 530 and the electronic tag 550 is 2.5 m, but the interval may increase or decrease depending on how the low frequency band signal is utilized.

In addition, when performing communication using a frequency signal of 900MHz band in order to identify the location of the electronic tag user of the mode switching method, the distance may be determined within a range of about 40 meters.

6 shows an example of practical use of the electronic tag recognition system of the mode switching method according to the present invention.

Referring to FIG. 6, when the father carrying the first electronic tag (Tag 1) arrives in the front of the apartment near the common entrance, the signal of the low frequency band transmitted by the first electronic tag recognition device (Base Station A) The Zigbee module of the first electronic tag Tag 1 that is in the power saving mode is activated by the wake-up information included in the wake-up information. The activated Zigbee module has a first electronic tag (Tag 1) and a first electronic tag recognition device (Base Station A) perform regular communication using a microwave signal, and the first certified tag (Tag 1) is installed in the apartment. Inform the wallpad that you have approached. The wall pad informs this information to a central server connected by a LAN, and the central server processes the information and sends a second electronic tag (Tag 2) to a second electronic tag recognition device (Base Station B) via another wall pad. Inform the family that the father has arrived via a delivery device such as a speaker (not shown) built in the electronic tag, or enable the buzzer, etc. built in the second electronic tag (Tag 2).

On the other hand, the child playing on the playground, if a problem occurs by pressing the button 557 attached to the electronic tag for more than a certain time or a certain pressure, even if it is slightly away from the second electronic tag recognition device (Base Station B), A signal indicating forcibly generating an emergency signal can be transmitted to the second electronic tag recognition base station (B).

The operation associated with the button 558 and the buzzer 559 embedded in the electronic tag is controlled by the main controller 554.

In addition, the child playing in the playground is a semi-active communication unit provided in the second electronic tag Tag2 continuously communicates with the second electronic tag recognition device (Base Station B) using a frequency signal of 900MHz and the second electronic The tag recognizing apparatus (Base Station B) may frequently check the location of the child having the second electronic tag (Tag2) by providing the information to the server through a wall pad.

In addition, even if the child is out of the recognition range of the second electronic tag recognition device (Base Station B), the information is provided to the server through the wall pad, and the server transmits the information to the first electronic tag Tag1 via the wall pad. ) To track and retrieve the location of the child with the second Tag2 by sending it to the father in possession, and if it is outside the defined range (e.g. if the elderly leave the complex or the child leaves the playground). For example, an alarm may be generated.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

1 shows an example of a configuration of a wireless communication network using Zigbee.

2 shows an example of a beacon used in a short range wireless private network using a Zigbee.

3 shows electrical characteristics of an electronic tag for each frequency band.

FIG. 4 shows advantages and disadvantages of the frequency bands shown in FIG. 3.

5 is an embodiment of an electronic tag recognition system of a mode switching method according to the present invention.

6 shows an example of practical use of the electronic tag recognition system of the mode switching method according to the present invention.

Claims (25)

A low frequency band induction receiver for receiving a signal of a low frequency band radiated from a mode tag type electronic tag recognition device; A Zigbee communication unit for converting into an active mode in response to the wake-up information included in the signal of the low frequency band in a power saving mode state, and performing a Zigbee communication with the electronic tag recognition device of the mode switching method in an active mode state; And And a semi-active communication unit which communicates with the mode tag type electronic tag recognition device by using a frequency signal of 900 MHz band radiated from the mode tag type electronic tag recognition device. The Zigbee communication unit And a Zigbee communication using the mode switching electronic tag recognition device and a frequency signal of 2.4 GHz. A low frequency band induction receiver for receiving a signal of a low frequency band radiated from a mode tag type electronic tag recognition device; A Zigbee communication unit for converting into an active mode in response to the wake-up information included in the signal of the low frequency band in a power saving mode state, and performing a Zigbee communication with the electronic tag recognition device of the mode switching method in an active mode state; And And a semi-active communication unit which communicates with the mode tag type electronic tag recognition device by using a frequency signal of 900 MHz band radiated from the mode tag type electronic tag recognition device. The Zigbee communication unit And a Zigbee communication method using a mode switching electronic tag recognition device and a frequency signal of 430 to 440 MHz or 894 to 942 MHz. A low frequency band induction receiver for receiving a signal of a low frequency band radiated from a mode tag type electronic tag recognition device; A Zigbee communication unit for converting into an active mode in response to the wake-up information included in the signal of the low frequency band in a power saving mode state, and performing a Zigbee communication with the electronic tag recognition device of the mode switching method in an active mode state; And And a semi-active communication unit which communicates with the mode tag type electronic tag recognition device by using a frequency signal of 900 MHz band radiated from the mode tag type electronic tag recognition device. The Zigbee communication unit Zigbee communication is performed using the mode switching electronic tag recognition device using a 2.4 GHz frequency signal, or Zigbee communication is performed using the mode switching method electronic tag recognition device using a frequency signal of 430 to 440 MHz or 894 to 942 MHz. Electronic tag of mode switching method characterized in that performed. The method according to any one of claims 1 to 3, wherein the semi-active communication unit A power supply unit supplying power to maintain the wake-up state at all times; Control unit for identifying its own position using a frequency signal of the 900MHz band radiated from the mode switching electronic tag recognition device when the electronic tag of the mode switching method is within a certain distance from the electronic tag recognition device of the mode switching method. ; And And an antenna unit configured to receive a 900 MHz band frequency signal radiated from the mode tag type electronic tag recognition device and to transmit information about its position identified by the controller to the mode tag type electronic tag recognition device. Electronic tag of mode switching method characterized in that. The method of claim 4, wherein the semi-active communication unit Receiving a frequency signal of the 900MHz band radiated from the mode switching electronic tag recognition device by the back scattering method for information on the position of the mode switching electronic tag by the electronic tag of the mode switching method Electronic tag of the mode switching method characterized in that the transmission to the recognition device. The method of claim 4, wherein the Zigbee communication unit, A Zigbee communication device performing Zigbee communication with the mode tag type electronic tag recognition device; A wake-up signal detector for generating a mode conversion instruction signal corresponding to the wake-up information included in the signal of the low frequency band; And A main control device for enabling the Zigbee communication device in response to the mode conversion command signal; And the main control device and the Zigbee communication device are switched from a power saving mode to an active mode when the first mode conversion command signal is in an enabled state. The method of claim 6, wherein the wake up signal detector, And comparing the pattern of the signal in the low frequency band with an active pattern stored in advance, and enabling the mode conversion command signal according to a comparison result. The method of claim 4, wherein Further comprising a memory for storing information about the user of the electronic tag, And the user information stored in the memory is transmitted to the mode tag type electronic tag recognition device through the Zigbee communication device. The method of claim 4, wherein the electronic tag of the mode switching method, More buttons, And the Zigbee communication unit is switched to an active mode when the button is pressed for a time longer than a reference time. The method of claim 4, wherein the electronic tag of the mode switching method, More buttons, And the Zigbee communication unit is switched to an active mode when the button is pressed at a pressure higher than a reference pressure. The method of claim 4, wherein the electronic tag of the mode switching method, And a buzzer controlled by the Zigbee communication unit, and at least one of an RF chip attached to a traffic card or a credit card. The method of claim 4, wherein The frequency of the signal of the low frequency band is an electronic tag of the mode switching method, characterized in that 125KHz. The method of claim 4, wherein the electronic tag of the mode switching method The mode tag electronic tag is characterized in that it is implemented in one chip together with a sim card and mounted on a mobile device such as a mobile phone. ZigBee communication module for performing the ZigBee communication with the mode-tagged electronic tag; A low frequency band induction transmitter for transmitting the low frequency band signal by including wake-up information; MCU which authenticates the electronic tag of the mode switching method and provides various services to the holder of the electronic tag of the mode switching method; And And a 900 MHz band frequency signal transmitting / receiving unit for transmitting a 900 MHz band frequency signal to the mode switching electronic tag. And the Zigbee communication module communicates with the mode switching electronic tag using a 2.4 GHz frequency signal. ZigBee communication module for performing the ZigBee communication with the mode-tagged electronic tag; A low frequency band induction transmitter for transmitting the low frequency band signal by including wake-up information; MCU which authenticates the electronic tag of the mode switching method and provides various services to the holder of the electronic tag of the mode switching method; And And a 900 MHz band frequency signal transmitting / receiving unit for transmitting a 900 MHz band frequency signal to the mode switching electronic tag. The Zigbee communication module is an electronic tag recognition apparatus of the mode switching method, characterized in that for communicating with the electronic tag of the mode switching method using a frequency signal of 430 to 440MHz or 894 to 942MHz. ZigBee communication module for performing the ZigBee communication with the mode-tagged electronic tag; A low frequency band induction transmitter for transmitting the low frequency band signal by including wake-up information; MCU for authenticating the electronic tag of the mode switching method, and providing various services to the holder of the electronic tag of the mode switching method; And And a 900 MHz band frequency signal transmitting / receiving unit for transmitting a 900 MHz band frequency signal to the mode switching electronic tag. The Zigbee communication module communicates with the mode switching electronic tag using a 2.4 GHz frequency signal, or communicates with the mode switching electronic tag using a frequency signal of 430 to 440 MHz or 894 to 942 MHz. Electronic tag recognition device of mode switching method. The method according to any one of claims 14 to 16, And a frequency of the signal in the low frequency band is 125 kHz. The method according to any one of claims 14 to 16, And a 900 MHz band frequency signal transmitting / receiving unit communicates with the semi-active communication unit to identify the position of the mode switching electronic tag. The method according to any one of claims 14 to 16, And an Ethernet communicator for communicating with an external device of the electronic tag recognition device. The method of claim 19, wherein the external device, A mode switch type electronic tag recognition device, characterized in that the home network controller is a wall pad or kiosk. Mode for storing and outputting user information, and having a semi-active communication unit for communicating with the mode switching type electronic tag recognition device using a frequency signal of 900MHz band, and a Zigbee communication unit operating in the power saving mode and active mode Switchable electronic tags; An apparatus for recognizing an electronic tag of a mode switching method using the user information to authenticate the electronic tag holder of the mode switching method, communicating with the semi-active communication unit, and providing various services to the electronic tag holder of the mode switching method. ; A wall pad that provides a service to a user or outputs the information as it is by using information about the mode tag type electronic tag holder received from the electronic tag recognition device; And And a server for providing a service to the user or another user related to the user by using the user information transmitted through the wall pad. The mode tag type electronic tag recognition device transmits a wake-up signal using a signal of a low frequency band, When the wake-up signal is enabled, the electronic tag of the mode switching method receives the user information stored in the electronic tag and the signal of the low frequency band by the electronic tag recognition device of the mode switching method when the wake up signal is enabled. And a mode switching method for transmitting the information on the strength to the electronic tag recognition device of the mode switching method. The method of claim 21, The frequency of the signal in the low frequency band is 125KHz, The mode tag type electronic tag recognition system in an active mode is in a mode switching type electronic tag recognition system, characterized in that the Zigbee communication with the mode tag type electronic tag recognition device using a frequency signal of 2.4GHz. The method of claim 21, The frequency of the signal in the low frequency band is 125KHz, The mode tag type electronic tag in the active mode state uses a frequency signal of 430 to 440 MHz or 894 to 942 MHz and the Zigbee communication mode of the mode switch type electronic tag recognition system, characterized in that the ZigBee communication . The method of claim 21, The frequency of the signal in the low frequency band is 125KHz, The mode tag type electronic tag in an active mode state communicates with the mode tag type electronic tag recognition device using a 2.4 GHz frequency signal or the mode switch type method using a frequency signal of 430 to 440 MHz or 894 to 942 MHz. The electronic tag recognition system of mode switching method characterized in that the Zigbee communication with the electronic tag recognition device. The server of any one of claims 22 to 24, wherein the server comprises: And a mode switching method according to the magnitude of the received strength, the mode switching method of the electronic tag recognition system, characterized in that to distinguish and instruct to provide a service to the electronic tag holder of the mode switching method.

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