KR100741353B1 - USN / RFID tag integration module - Google Patents

Abstract

The present invention relates to a USN / RFID tag integration module in which an RFID tag module and a USN module are integrated into one.

The USN / RFID tag integration module according to the present invention includes an RFID tag module attached to a recognition object and storing identification data unique to the recognition object and modulating and outputting identification data unique to the recognition object by an external command, The RFID tag module and the RFID tag module to transmit and receive data and to process sensed information sensed by an internal sensor and to transmit both the computed data and identification data unique to the recognition object output from the RFID tag module to the USN / And a USN module for wirelessly transmitting to the reader.

According to the present invention, it is possible to centrally monitor and control not only the reading / writing of the RFID tag, but also the surrounding environment by adding the sensing function of the USN and the communication function between the objects.

Ubiquitous Computing, Wireless Sensor Network, USN, RFID Tag, Integrated Module.

Description

USN / RFID Tag Integration Module {USN / RFID Tag Integration Module}

1 is a schematic block diagram of a conventional communication system using an RFID tag

2 is a block diagram of a USN / RFID tag integration module according to an embodiment of the present invention.

3 is a block diagram of a communication system having the integration module of FIG.

Figure 4 is a simplified data flow diagram of Figure 3;

Description of the Related Art

100: RFID tag module 102: clock generator

104: power supply unit 106:

108: Modulation switch 110: Memory

112: codec unit 114: modulation unit

200, 510, 610: USN module 202: sensor

204: A / D conversion unit 206: MAC

208: storage unit 210: control unit

212: RF transmitting / receiving unit 214: antenna

220: Sensor application 300: Flat cable

400: USN / RFID tag integration module 500: USN / RFID reader

510: RFID reader module 600: USN / processing server

610: Processing server

The present invention relates to a USN / RFID tag integration module in which an RFID tag module and a USN module are integrated into one.

The RFID tag was developed for the purpose of identifying livestock in the agricultural department of the US National Laboratory.

An RFID reader (Reader), which can store an electrical code for identifying an animal, is inserted into an animal or stored in an RFID tag and attached to the animal, and is installed in an animal housing, so that the animal can be conveniently returned.

The RFID reader transmits the RF signal to the RFID tag, and the electrical code stored in the RFID tag is returned to the reader through the modulator of the RFID tag.

At this time, the RFID tag has an antenna coil and transmits the modulation signal to the RFID reader.

In recent years, the above-described RFID technology has been tested in various fields, among which communication systems are attracting attention due to various applications.

1 is a schematic block diagram of a conventional communication system using an RFID tag.

1, a plurality of RFID tags 20a, 20b, ..., 20n attached to recognition targets 10a, 10b, ..., 10n and storing the unique information of the recognition targets are connected to a wireless network And is connected to an RFID reader 30 that performs reading and deciphering functions.

The RFID reader 30 is connected to a processing server 40 that processes data read from the RFID reader 30 by a wired network such as RS-232, RS-422, or RS-485.

The RFID tags 20a to 20n are composed of an antenna and a low-power IC circuit and communicate with the RFID reader 30. The RFID reader 30 recognizes the RFID tags 20a, 20b, ..., And transmits the unique information of the objects 10a, 10b, ..., 10n to the processing server 40 after reading the unique information.

However, in the conventional communication system using the RFID tag, communication with the RFID tags 20a, 20b, ..., 20n is possible only when the RFID reader 30 is in the vicinity, The RFID tags 20a, 20b, ..., and 20n do not have a sensing function and can not detect changes in the surrounding environment and can not communicate with each other due to the inability to perform active functions in real time It has become a limitation in technology development and field application of many application fields.

In the communication system using the conventional RFID tag, the RFID tags 20a, 20b, ..., and 20n and the RFID reader 30 are in wireless communication, but the network configuration between the RFID reader 30 and the processing server 40 is Most of the troubles have occurred when a large number of networks are constituted due to high cost and low efficiency by transmitting / receiving data by connecting mostly thick cable (RS-232, RS-422, RS-485).

It is an object of the present invention to provide a USN / RFID tag integration module capable of implementing a sensor network in an RFID tag as well as existing RFID functions in a wireless sensor network environment.

It is another object of the present invention to provide a UWB wireless communication system and a UWB wireless communication system which can realize mutual perception of environment (environment) by implementing a Ubiquitous Sensor Network (USN), wireless communication between an RFID tag and an RFID reader, / RFID tag integration module.

According to an aspect of the present invention, there is provided a USN / RFID tag integration module, which is attached to a recognition object and stores unique identification data of the recognition object, The RFID tag module is connected to the RFID tag module and is capable of transmitting and receiving data. The sensing information is sensed by an internal sensor, and the sensed data is transmitted to a recognition object And a USN module for wirelessly transmitting all of the unique identification data to the USN / RFID reader.

First, Ubiquitous Computing and USN will be described to help understand the present invention.

Countries around the world are accelerating the convergence of technology and broadband communication networks in order to go into the ubiquitous computing environment not only in the field of information and communication but also in the whole industry.

In particular, as objects and physical objects scattered in the living environment are gradually expanded to objects of information, Ubiquitous Computing (Ubiquitous Computing), which provides a variety of convenient new services by organically linking human, computer, and object Interest is growing.

This ubiquitous computing environment starts from embedding computing, sensing, and communication functions in all objects. In particular, a sensor network technology that performs sensing and control functions of a human external environment is attracting attention as a core technology.

That is, Ubiquitous Sensor Network (USN: Ubiquitous Sensor Network) is a device that recognizes objects and environments by attaching RFID tags to all objects and constructs and utilizes real-time information through networks.

The USN attaches an RFID tag to all necessary places, detects environmental information (temperature, humidity, contamination information, crack information, etc.) of the surrounding environment on the basis of the recognition information of the object, And it is a technology capable of implementing an environment in which communication can be performed by adding computing and communication capabilities to all objects.

 In the USN, the USN initially acquires environment information by adding a sensing function in the step of identifying the object through the RFID tag, and then transmits the environment information to the Ad-hoc network To the step of controlling RFID tags having relatively few functions as RFID tags.

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

FIG. 2 is a block diagram of a USN / RFID tag integration module according to an embodiment of the present invention, and FIG. 3 is a block diagram of a communication system having the integration module of FIG.

2, the USN / RFID tag integration module 400 according to the embodiment of the present invention includes a USN module 200 having a sensing function, an arithmetic processing function, and a wireless communication function, Wherein the USN module 200 and the RFID tag module 100 are connected to each other by a flat cable 300 to connect the flat cable 300 to the RFID tag module 100. [ Lt; RTI ID = 0.0 > and / or < / RTI >

When the RFID tag module 100 approaches the frequency operation range of the USN / RFID reader 500 in the passive type, the RFID tag module 100 is powered and activated wirelessly.

The RFID tag module 100 activated by the supplied power source waits for an instruction from the USN / RFID reader 500 and then transmits a response to the command when the correct command is received to the USN / RFID reader 200 through the USN module 200 .

If no response is received from the USN module 200 even after the delay time defined by the standard has elapsed after transmitting the command, the USN / RFID reader 500 does not perform further communication.

The RFID tag module 100 includes a clock generator 102, a power supply 104, a command detector 106, a modulation switch 108, a memory 110, a codec 112, and a modulator 113 And is readable and writable by the USN / RFID reader 500.

When the USN / RFID reader 500 is in the proximity of the USN / RFID reader 500, an induction electromotive force is generated to be supplied to the power source unit 104, and the power source unit 104 converts the induced electromotive force to a DC voltage.

The power supply unit 104 of the present invention is an active RFID tag module 100 composed of a battery for outputting a DC voltage.

The clock generator 102 receives power from the power supply 104, generates a clock, divides the clock, and provides appropriate clocks, i.e., operation timings, to peripheral components.

The command detection unit 106 detects whether a correct command is received from the USN / RFID reader 500.

The modulation switch 108 selects which of the modulation method of the RFID tag module 100, that is, the PSK (Phase Shift Keying), ASK (Amplitude Shift Keying), FSK (Frequency Shift Keying)

The phase shift keying (PSK) is a method of transmitting and receiving a digital signal, and the phase of a signal transmitted to carry information is changed.

The ASK (Amplitude Shift Keying) is a method of expressing bits according to a change in the size of an outgoing signal in digital data transmission.

The frequency shift keying (FSK) is a frequency modulation method that combines binary data into one carrier.

The memory 110 is connected to the clock generation unit 102 and the command detection unit 106 to store identification data unique to the recognition object together with the RFID tag module 100 data.

Sensing information sensed by the sensor 202 provided in the USN module 200 is stored and automatically transmitted to the USN / RFID reader 500 (for example, temperature, humidity, light, ) Are close to each other.

The codec unit 112 is connected to the memory 110 and codes identification data unique to the recognition object as identification codec data.

The modulator 114 is connected to the codec unit 112 and modulates the identification codec data into identification modulation data.

At this time, the modulator 114 modulates the modulated signal in one of the modulation schemes PSK, ASK, and FSK selected by the modulation switch 108.

The USN module 200 receiving identification modulation data unique to the RFID tag module 110 through the flat cable 300 includes a sensor 202, an A / D conversion unit 204, a MAC 206, A storage unit 208, a control unit 210, an RF transmitting and receiving unit 212, and an antenna 214.

The antenna 214 may be a transmit and receive ceramic chip antenna and may be provided in the USN module 510 of the USN / RFID reader 500 or the antenna 214 of the neighboring USN / RFID tag integration module 400. (Not shown) and an RF signal.

The RF transceiver 212 functions to transmit and receive an RF signal.

That is, a frequency to be transmitted / received through the antenna 214 is generated and combined with data to be transmitted or data is extracted from the received frequency.

The control unit 210 processes sensing data of the sensor 202 or data received through the antenna 214 according to a program stored in the storage unit 208 and controls each component.

The MAC (Media Access Controller) 206 controls protocol conversion and access problems of the data link layer.

The storage unit 208 stores a control program and a sensor application program downloaded from an external sensor application 220.

The sensor 202 senses sensed information such as temperature, humidity, light, and position of a recognition object to which the RFID tag module 100 is attached or its surroundings.

The A / D converter 204 converts the sensing information of the sensor 202 into digital data because it is analog data.

The external sensing application 220 provides an application program for each sensor 202 to the USN module 200 and the USN module 200 stores the application program in the storage unit 208.

Although the USN module 100 and the RFID tag module 200 are connected by the flat cable 300 in the embodiment of the present invention, the USN module 100 and the RFID tag module 200 may be integrally mounted on one PCB, have.

If the network is configured by applying the USN modules 510 and 610 to the RFID reader module 520 and the processing server 620 as well as the RFID tag module 100 according to the embodiment of the present invention in the communication system of FIG. The USN / RFID reader 500 and the USN / processing server 600 are connected to each other through a wireless network between the RFID tag integration module 400 and the USN / RFID reader 500.

At this time, one or two frequency bands of 125 KHZ, 134 KHz, 13.56 MHz, 433 MHz, 900 MHz and 2.4 GHz are used in the wireless network.

In particular, the wireless network path D between the USN / processing server 600 and the USN / RFID reader 500 may be a bidirectional wired communication via an RS232 or RS485 cable or a 900 MHz or 2.4 GHz frequency band via a USN module 610, Directional wireless communication.

The wireless network path C between the two neighboring USN / RFID readers 500 is an Ad-hoc network and performs bidirectional wireless communication in the 900 MHz or 2.4 GHz frequency band through the USN module 510, The distance is 30 ~ 70M (900MHz) or 50 ~ 150M (2.4GHz).

The wireless network path A between the two neighboring USN / RFID tag integration modules 400 according to the embodiment of the present invention is configured such that the Ad-hoc network is configured to transmit the 900 MHz or 2.4 GHz frequency band through the USN module 200 Way communication, and the communication distance is 30 to 70 M (900 MHz) or 50 to 150 M (2.4 GHz).

The wireless network path B between the USN / RFID tag integration module 400 according to the embodiment of the present invention and the USN modules 200 and 510 of the USN / RFID reader 500 is configured as an Ad- (Communication distance 30 to 70M, 50 to 150M) in the 900 MHz or 2.4 GHz frequency band through the RFID reader module 520 and the wireless network path B 'between the RFID reader module 520 and the RFID tag module 100, Way communication (communication distance of about 5M) of the frequency band of 124KHz or 134KHz through the reader module and the RFID tag module.

4 is a simplified data flow diagram of Fig.

4, the RFID reader module 520 of the USN / RFID reader 500 transmits a signal in the frequency band of 125 / 134KHz, and the RFID tag module 200 of the USN / RFID tag integration module 400 Receives the 125 / 134KHz signal and transmits data according to the signal response to the USN module 100. The USN module 100 transmits the data according to the signal response to the USN / RFID reader 500 to the USN / RFID reader 500. The USN /

The data transmitted to the USN / RFID reader 500 is transmitted to the USN / processing server 600 through the USN module 510 and 610 again.

As described above, according to the present invention, the USN / RFID tag integration module capable of sensor networking in the RFID tag module as well as the existing RFID tag function in the wireless sensor network environment can be realized.

First, by applying USN module to RFID tag, RFID reader, and processing server, not only reading / writing of RFID tag, USN sensing function and inter-entity communication function can be added to monitor and control the surrounding environment from the center as well.

Second, even when the position of the RFID tag, the RFID reader, and the processing server are changed, it is possible to move the position without any additional network operation.

Claims (10)

An RFID tag module attached to a recognition target and storing unique identification data for the recognition target and modulating and outputting identification data unique to the recognition target by an external command; The RFID tag module is capable of transmitting and receiving data, calculating sensed information sensed by an internal sensor, and outputting both the computed data and identification data unique to the recognition object output from the RFID tag module to a USN / RFID reader And a USN module for performing Ad-hoc network wirelessly in the USN / RFID tag integration module. The method according to claim 1, The RFID tag module includes: DC power supply, A clock generating unit receiving a power from the power supply unit to generate a clock and providing an operation timing to the clock; A command detector for detecting whether a correct command is received from the USN / RFID reader, A memory coupled to the clock generator and the command detector to store RFID tag module data and identification data unique to the object; A codec unit connected to the memory for coding identification data unique to a recognition object into identification codec data, And a modulator coupled to the codec for modulating identification codec data into identification modulated data. 3. The method of claim 2, Wherein the power supply unit comprises a battery for outputting a DC voltage. 3. The method of claim 2, And a modulation switch for selecting a modulation scheme of the RFID tag module, Wherein the modulator modulates the modulated signal by a modulation scheme selected by the modulation switch. The method according to claim 2 or 4, Wherein the modulator modulates the modulated signal using one of FSK, ASK, and PSK modulation schemes. 3. The method according to claim 1 or 2, The USN module comprises: An antenna for transmitting and receiving data, An RF transmitting and receiving unit for generating frequencies to be transmitted and received through the antenna and combining the data with data to be transmitted or extracting data from the received frequency; A control unit for processing the data received through the antenna and the sensing data of the sensor and controlling the respective units, A storage unit for storing a program necessary for controlling the control unit and an application program of the sensor; A sensor for sensing the temperature and humidity of the object to be recognized and its surroundings to obtain sensing information, and And an A / D converter for converting sensing information of the sensor into digital sensing data. delete The method according to claim 1, The USN / RFID tag integration module and the USN / RFID reader, in which the RFID tag module and the USN module are integrated, and the USN / RFID reader are installed in two frequency bands of 125 kHz, 134 kHz, 13.56 MHz, 433 MHz, 900 MHz, And performs wireless communication with the USN / RFID tag integration module. 9. The method of claim 8, Wherein the USN module performs bidirectional wireless communication with a USN / RFID reader in a frequency band of 900 MHz or 2.4 GHz. 10. The method according to claim 8 or 9, Wherein the RFID tag module performs unidirectional wireless communication in a frequency band of 125 KHz or 134 KHz from a USN / RFID reader.

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