KR101161787B1 - System for Direct Data Communication Between RFID Tags - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for directly communicating data between RFID tags, and wherein, in at least one RFID tag, at least one or more pieces of data (or RFID information) and a radio recognition tag 1 for transmitting a request signal and data (or RFID information) requested by the radio recognition tag 1, and requesting data (or RFID information) of the radio recognition tag 1 Of the at least one radio recognition tag (2, 3, 4 ... N) for transmitting a predetermined response signal containing the provided data (or RFID information) in response to the signal to the radio identification tag (1) Contains a specific RFID tag.

Wireless, recognition, tag, direct, communication

Description

System for Direct Data Communication Between RFID Tags

1 is a diagram illustrating a functional configuration of a system for directly communicating data between tags according to a preferred embodiment of the present invention.

Fig. 2 is a diagram showing a preferable functional configuration of the radio recognition tag 1 for transmitting predetermined data (or RFID information) request signals to at least one radio recognition tag 2, 3, 4, ..., N.

FIG. 3 is a diagram showing a preferable data configuration of the radio recognition tags 2, 3, 4, ..., N in which predetermined data (or RFID information) is transmitted and received at the request of the radio recognition tag 1. As shown in FIG.

4 illustrates a preferred data structure of a radio tag for direct data communication between the radio tag.

FIG. 5 shows a preferred procedure for the routing process for the transmission and reception of signals and / or data between the RFID tag 1 and the RFID tags 2, 3, 4,..., N. FIG.

FIG. 6 shows a preferred procedure for the process of transmitting and receiving signals and / or data between the RFID tag 1 and the RFID tags 2, 3, 4,..., N. FIG.

7 is a diagram illustrating a method of directly communicating data between radio recognition tags according to a preferred embodiment of the present invention.

<Description of main parts of drawing>

100: radio recognition tag 200: transmission and reception module

205: code / decoder 210: main processor

215: memory 220: communication slot processing unit

According to the present invention, in a system for directly communicating data between radio recognition tags, radio recognition tags for transmitting at least one data (or RFID information) request signal to at least one radio recognition tag (2, 3, 4 ... N) ( 1) and data (or RFID information) required by the radio recognition tag 1, and the data (or RFID information) provided in response to a data (or RFID information) request signal of the radio identification tag 1 is provided. Data between radio recognition tags including a specific radio recognition tag among the at least one radio recognition tag (2, 3, 4 ... N) for transmitting a predetermined response signal including the &lt; RTI ID = 0.0 &gt; Relates to a direct communication system.

RFID systems incorporate the use of electromagnetic or electrostatic coupling within the radio frequency of the electromagnetic spectrum portion to identify certain objects in the field of distribution and logistics. This RFID system is a technology that can replace the barcode, which is less likely to be damaged than the barcode, and can read multiple tags at the same time at high speed. Even if an obstacle exists, it can be read, read and written, and reused.

In addition, low frequency RFID systems (30 kHz to 500 kHz) are used in short transmission areas of about 1.8 m or less, while high frequency RFID systems (850 MHz to 950 MHz and 2.4 GHz to 2.5 GHz) are used for long distances of 27 m or more. It is widely used in inventory management, container / pallet / box management, automatic inspection, incoming and outgoing management, automatic sorting, rental goods management, counterfeit goods identification, anti-theft, cargo and goods tracking management.

For example, the RFID system is attached to a predetermined article, the RFID tag that stores information about the article, an antenna for transmitting and receiving the RFID tag and the predetermined data, and communicates with the RFID tag through the antenna RFID The reader may be configured to control the operation of the tag, and a host computer to collect and manage data of the RFID tag provided by the reader.

Such an RFID system has relied on a host computer that manages the data of the RFID tag in order to use the information (eg, article information, etc.) stored in the RFID tag. For example, when the host computer does not operate or is overloaded, it is difficult to use data held by the RFID tag.

In addition, in order to partially and / or effectively manage a large number of tags provided in a store or the like, it is necessary to grasp data stored between the tags and search for and obtain necessary information.

SUMMARY OF THE INVENTION An object of the present invention for resolving the above problems is at least one or more data (or RFID information) with at least one RFID tag 2, 3, 4 ... N in a RFID direct data communication system. (A) a radio recognition tag (1) for transmitting a request signal and data (or RFID information) requested by the radio recognition tag (1), and to the data (or RFID information) request signal of the radio recognition tag (1). Corresponding particular radio among the at least one RFID tag 2, 3, 4 ... N for transmitting a predetermined response signal including the provided data (or RFID information) to the RFID tag 1 correspondingly. The present invention provides a system for directly communicating data between radio recognition tags including an identification tag.

According to an embodiment of the present invention, a system for directly communicating data between tags may include at least one data (or RFID) with at least one RFID tag (2, 3, 4 ... N). Information) a radio recognition tag 1 for transmitting a request signal and data (or RFID information) requested by the radio recognition tag 1, and a data (or RFID information) request signal of the radio recognition tag 1 Specific of the at least one RFID tag (2, 3, 4 ... N) for transmitting a predetermined response signal containing the provided data (or RFID information) to the RFID tag 1 corresponding to Characterized in that it comprises a radio recognition tag.

According to the present invention, the radio recognition tag 1 is characterized by fixing a specific radio identification tag and a communication slot number among the at least one radio recognition tag (2, 3, 4 ... N).

According to the present invention, the specific radio recognition tag is characterized in that the radio identification tag (1) and the communication slot number is fixed.

According to the present invention, the radio recognition tag 1 to N, the transmission and reception module for transmitting and receiving a predetermined signal and / or data between the radio identification tag (1 to N), the transmission and reception module is the radio recognition tag (1 to N) A code / decoder to receive and decode a signal and / or data received between the terminals) and to encode a signal and / or data to be transmitted between the RFID tags 1 to N and output the encoded signal and / or data to the transmission / reception module. A main processor for performing a predetermined operation according to the signal and / or data decoded by the decoding unit and outputting a response signal and / or data according to the execution of the predetermined operation to the code / decoding unit, and predetermined data (or RFID information) Communication slot processing unit for processing a communication slot for storing and transmitting a predetermined signal and / or data between the memory and the radio recognition tag (1 to N) to the main processing unit Characterized in that formed by having.

Hereinafter, a method and a system for directly communicating data between radio recognition tags of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 1 to 7.

According to the present invention, the RFID tag that directly communicates data between the RFID tags will be capable of both transmitting and receiving data including the same technology configuration, but for the sake of efficiency, at least one or more data (or The RFID tag requesting RFID information is called a RFID tag 1, and at least one RFID tag that provides predetermined data (or RFID information) in response to a request of the RFID tag 1 is wireless. It is referred to as recognition tag (2, 3, 4, ..., N).

1 is a diagram illustrating a functional configuration of a system for directly communicating data between radio recognition tags 100 according to a preferred embodiment of the present invention.

According to the invention, the system is a radio recognition tag (1) and the radio recognition to transmit at least one or more data (or RFID information) request signal to at least one radio identification tag (2, 3, 4 ... N) A predetermined data including data (or RFID information) requested by the tag 1 and including the provided data (or RFID information) corresponding to the data (or RFID information) request signal of the RFID tag 1. It may be configured to include a specific radio identification tag of the at least one radio identification tag (2, 3, 4 ... N) for transmitting a response signal to the radio identification tag (1).

Here, the RFID tag 100 is composed of a memory element for storing predetermined data (or RFID information) and a predetermined wireless chip (eg, an integrated circuit) and an antenna including a logic element for data processing. The wireless chip includes a control unit for controlling data input / output for direct data communication between the radio recognition tags 100 and a memory for storing predetermined data (or RFID information) for direct data transmission and reception between the radio recognition tags 100. It is characterized by comprising a part.

According to a preferred embodiment of the present invention, the radio tag 100 is an electronic circuit that emits or receives a predetermined radio wave, and in association with the electronic circuit to emit a radio wave of a specific frequency to the radio tag 100 And / or a receiving antenna, a microprocessor for reading and checking a predetermined data by reading a signal received from the RFID tag 100, a memory for storing the data, and the data In the case of normal tag information read from the radio recognition tag 100, a reader comprising a communication unit for transmitting the tag information to a predetermined information processing terminal (or server) and a predetermined function configuration for radio recognition processing It is preferable that this is provided basically.

In addition, the RFID tag 100 receives a predetermined radio wave from the RFID reader and converts into a power source, and / or a predetermined power source from a product to which the RFID tag 100 is attached. It may also include an active wireless identification tag 100 is provided with a battery for supplying power or by itself. In addition, the memory unit provided in the wireless chip of the wireless tag 100 may be provided with only a read function or both read / write. The antenna of the wireless tag 100 may be internal or external to the wireless chip. It is possible to exist in all. As a result, the wireless recognition tag 100 of the present invention is not limited by the manufacturer or the wireless recognition method or the frequency of manufacturing the wireless recognition tag 100.

Referring to FIG. 1 according to a preferred embodiment of the present invention, a system for directly communicating data between RFID tags 100 including the RFID tags 100 may include at least one RFID tag 2, 3, or the like. 4,... N, a radio recognition tag 1 including a function configuration for transmitting at least one data (or RFID information) request signal, and the data (or RFID information) requested by the radio recognition tag 1. And transmitting a predetermined response signal including the provided data (or RFID information) to the radio recognition tag 1 in response to a data (or RFID information) request signal of the radio recognition tag 1. And at least one radio recognition tag (2, 3, 4, ..., N), wherein the radio identification tag (1) is the at least one or more data in the direct communication process between the radio identification tag (100) Wireless Tag (2,3,4, ..., N) is characterized in that obtained by including in the functional structure for fixing a particular RFID tag to communicate with the slot number.

Here, the specific radio recognition tag is characterized in that the communication slot number fixed with the radio identification tag (1).

According to an embodiment of the present invention, the radio recognition tag 1 preferably includes an active radio identification tag, and the radio identification tags 2, 3, 4,..., N are active radio identification tags and It may also include a passive RFID tag.

Fig. 2 is a diagram showing a preferable functional configuration of the radio recognition tag 1 for transmitting predetermined data (or RFID information) request signals to at least one radio recognition tag 2, 3, 4, ..., N.

Referring to FIG. 2, the radio recognition tags 100 to 1 described above with reference to FIG. 1 include a transmission / reception module 200, a code / decoder 205, a main processor 210, and a memory 215. And it may be configured to include a communication slot processing unit 220.

Preferably, the transmission and reception module 200 transmits and receives a predetermined signal and / or data between the radio recognition tag 100 (1 to N).

Here, the transmission / reception module 200 receives a predetermined high frequency signal or a low frequency signal transmitted from a predetermined terminal and / or the radio recognition tag 100, generates power by the received high frequency signal or low frequency signal, and tags Supply operating power to each part of the unit.

Preferably, the code / decoder 205 receives and decodes a signal and / or data received by the transmission / reception module 200 between the radio recognition tags 100 (1 to N), and decodes the radio identification tag ( 100) The signals and / or data to be transmitted (1 to N) are encoded and output to the transmission / reception module 200.

Preferably, the main processor 210 performs a predetermined operation according to the signal and / or data decoded by the code / decoder 205 and codes / decodes a response signal and / or data according to the execution of the predetermined operation. 205).

Preferably, the memory 215 stores predetermined data (or RFID information) and outputs it to the main processor 210.

Here, the memory 215 may be a system-specific area for storing radio identification tag unique information, a user area for storing at least one or more data, and a communication slot number storage area for data transmission and reception between the radio identification tags 100. Can be distinguished.

Preferably, the communication slot processing unit 220 processes a communication slot for transmitting and receiving a predetermined signal and / or data between the radio recognition tag 100 (1 to N).

Here, the communication slot processor 220 may be configured to include a random number generation block for generating a communication slot number based on the chip unique number.

The communication slot processor 220 may further include a selector for determining the communication slot number selection signals 0 to 1.

When the communication slot number selection signal is 1, the communication slot processor 220 generates a communication slot number using a random number generation block that generates a communication slot number based on a chip unique number. If the selection signal is 0, the communication slot number previously stored in the memory may be extracted.

FIG. 3 is a diagram showing a preferable data configuration of the radio recognition tags 2, 3, 4, ..., N in which predetermined data (or RFID information) is transmitted and received at the request of the radio recognition tag 1. As shown in FIG.

Referring to FIG. 3, the data configuration of the radio recognition tag 100 according to the present invention may be configured to include a synchronization signal, a header, data, a communication slot number, and a CRC.

Preferably, the synchronization signal is for synchronizing the data transmission and reception between the radio recognition tag 100, it is possible to determine the synchronization of the data in order to receive the data of the tag in the radio frequency communication.

Preferably, the header information may be used by encrypting the information of the thing, and may include command codes corresponding to a predetermined command.

Preferably, the data is a part including data required between the RFID tags 100.

Preferably, the communication slot number is used to control the accurate data transmission between the radio recognition tag 100 and the connection of other tags in the future.

Preferably, the CRC is a code for detecting an error of data transmission, and when each tag communicates in radio frequency communication, it may be used to detect an error that may occur by using the same frequency.

4 is a diagram illustrating a preferred data structure of the radio tag 100 for direct data communication between the radio tag 100.

Referring to FIG. 4, the memory of the illustrated RFID tag 100 includes a system specific area for storing related tag information (eg, a chip unique number, a reserved area, etc.), and a user area for storing item information and various service information. In addition, the wireless identification tag 100 may be classified into a communication slot number storage area for data transmission and reception.

Preferably, all of the communication slot number storage areas initially store “0” or “1”, and after communication is established, store the corresponding communication slot number. The communication slot number stored in the communication slot number storage area leaves a log so that history management can be performed later.

Preferably, the communication slot processing unit 220 shown in FIG. 4 may be configured to include a random number generation block and a selector.

Here, the random number generation block of the communication slot processing unit 220 generates a communication slot number based on the chip unique number. For example, when the selection signal is "1", the communication slot number stored in the memory on the radio recognition tag 100 is used. On the other hand, when the selection signal is "0", the history of the previously communicated tag is referred to. In this case, the communication slot number used at that time can be read from the memory and transmitted.

FIG. 5 shows a preferred procedure for the routing process for the transmission and reception of signals and / or data between the RFID tag 1 and the RFID tags 2, 3, 4,..., N. FIG.

FIG. 5 is a simple flowchart of a communication slot request and processing. The radio recognition tag 1 that has received a communication slot request command (500) has a selection signal of "0" (505), and the above-described in FIG. As described above, by referring to the history of previously communicated tags, the corresponding communication slot number is read from the memory and used (510).

On the other hand, if the selection signal is "1" (515), the RFID tag 1 generates a communication slot using a chip unique number and a random block to perform a new communication (520).

In each of the above cases, when using an existing communication slot number or generating a new communication slot number, the communication slot number is transferred to another radio recognition tag (2, 3, 4, ... N) together with the inactive mode. send.

Thereafter, when the tag receiving the command is a tag to which the radio recognition tag 1 wants to communicate (for example, the radio recognition tag 1 is a tag having desired information), communication is performed using the corresponding communication slot. Perform. In this case, when another tag wants to communicate, communication can be performed through the process of FIG. 6.

Accordingly, through the communication procedure illustrated in FIG. 5, the recognition rate may be improved and communication between tags may be performed by the number of corresponding communication slots.

FIG. 6 shows a preferred procedure for the process of transmitting and receiving signals and / or data between the RFID tag 1 and the RFID tags 2, 3, 4,..., N. FIG.

Referring to FIG. 6, a signal and / or data transmission / reception procedure between the RFID tags 100 may activate an activation mode with a plurality of RFID tags 2, 3, 4,... Adjacent to the RFID tag 1. Initiated by the transmitter (600).

When an activation mode is received from the RFID tag 1 with a plurality of RFID tags 2, 3, 4,... N, a plurality of RFID tags 2, 3 having received the activation mode are received. , 4,... N) generates a response signal while operating in an activation mode, and transmits the generated response signal to the RFID tag 1.

Then, the RFID tag 1 transmits a command for requesting predetermined information to the plurality of RFID tags 2, 3, 4,..., N (610).

The plurality of radio recognition tags (2, 3, 4, ... N) receives a command from the radio identification tag (1) (615), retrieves the memory information requested by the radio identification tag (1) Search for (620).

Herein, the specific RFID tag 2 for searching for the information requested by the RFID tag 1 transmits a response signal and communication slot number request data to the RFID tag 1 (625).

The radio tag 1 transmits a standby command to a plurality of tags (3, 4, ... N) except for the radio tag (2) (630), and the radio tag (2). In step 635, a communication slot number for communication is transmitted.

Then, the specific RFID tag 2 extracts the information requested by the RFID tag from the memory and transmits the information to the RFID tag 1 through a communication slot number received from the RFID tag 1 ( 640).

At this time, the radio recognition tag 1 ends when receiving data from the specific radio identification tag 2 (645), on the other hand, if it does not receive the data transmits a re-request command.

7 is a view showing a data direct communication method between the radio tag 100 according to a preferred embodiment of the present invention.

Referring to FIG. 7 according to a preferred embodiment of the present invention, the method of directly communicating data between the RFID tags 100 generates a predetermined electromagnetic field from the RFID tags 1 to generate at least one RFID tag 2, 3, 4, ..., N) is sent to send at least one or more data (or RFID information) request signal, the process is carried out by a predetermined data process reserved in the radio tag 1, Alternatively, the radio tag 1 receives a signal for initiating direct communication of data between the radio tag 100 from a device (for example, a device transmitting a radio wave to the radio tag 1). It is preferable to carry out.

In addition, the process of generating a predetermined electromagnetic field from the radio recognition tag 1 and transmitting at least one data (or RFID information) request signal to at least one radio identification tag (2, 3, 4, ..., N) The radio recognition tag 1 may further include transmitting a high frequency signal or a low frequency signal to at least one radio recognition tag 2, 3, 4... N.

In addition, the process of generating a predetermined electromagnetic field from the radio recognition tag 1 and transmitting at least one data (or RFID information) request signal to at least one radio identification tag (2, 3, 4, ..., N) The method may further include transmitting an activation mode switching command from the radio recognition tag 1 to at least one radio recognition tag 2, 3, 4 ... N.

For example, a process of generating a predetermined electromagnetic field from the RFID tag 1 and transmitting at least one data (or RFID information) request signal to at least one RFID tag 2, 3, 4, ..., N is performed. In more detail, the radio frequency identification tag 1 transmits a high frequency signal or a low frequency signal and an activation mode switching command to at least one radio recognition tag 2, 3, 4... Recognition tags (2, 3, 4 ... N), when receiving the high frequency signal or the low frequency signal transmitted by the radio recognition tag 1, the at least one radio recognition tag (2, 3, 4 ... N) generates power using the received signal to supply operating power to each part of the tag.

The at least one radio recognition tag (2, 3, 4 ... N) generates a response signal while operating in the activation mode by switching from the human mode to the activation mode after the power supply, and the generated response signal Is transmitted to the RFID tag 1, after receiving the response signal from the RFID tag 1, at least one or more data with the at least one RFID tag (2, 3, 4 ... N) (Or RFID information) A request signal is sent.

When a predetermined electromagnetic field is generated from the RFID tag 1 and at least one data (or RFID information) request signal is transmitted to the surrounding RFID tags 2, 3, 4, ..., N (700), The RFID tag 1 is a direct response data between the RFID tag 100 and a predetermined response signal corresponding to the request signal from at least one RFID tag 2, 3, 4, ..., N located in the electromagnetic field. Waiting for a predetermined communication slot request signal for communication to be received (705), the predetermined corresponding to the request signal from at least one radio recognition tag (2, 3, 4, ..., N) in the process of waiting for reception It is preferable to maintain a predetermined time until the response signal and the communication slot request signal are received.

In addition, at least one RFID tag 2, 3, 4,..., N, which is located in the electromagnetic field generated by the RFID tag 1 and receives the request signal, has a predetermined value corresponding to the received request signal. A response signal and a communication slot request signal for setting a communication slot for direct data communication with the radio recognition tag 1 are transmitted to the radio identification tag 1 (710).

Here, the at least one RFID tag 2, 3, 4 ... N receives a data (or RFID information) request signal transmitted by the RFID tag 1, and receives the received data (or RFID). Information) In response to the request signal, necessary information is searched through a memory search.

As a result of the search, the specific RFID tag including data (or RFID information) requested by the RFID tag 1 among the at least one RFID tag 2, 3, 4. The RFID tag 1 transmits a response signal and a communication slot request signal corresponding to the data (or RFID information) request signal.

If a predetermined response signal and a communication slot request signal corresponding to the data (or RFID information) request signal are received from a specific radio recognition tag 2 among the radio recognition tags 2, 3, 4,..., N. The radio recognition tag 1 fixes the communication slot number for direct data communication between the specific radio identification tag 2 and the radio identification tag 100 by using the received communication slot request signal (operation 715). 720, a predetermined data (or RFID information) request signal is transmitted to the specific RFID tag 2 through the fixed communication slot (725).

Here, in the process of fixing the communication slot number between the RFID tag 1 and the specific RFID tag 2, the RFID tag 1 stores data (or RFID information) required by the RFID tag 1. The standby command may be transmitted to a wireless identification tag except for the specific wireless identification tag, and the communication slot number may be transmitted to the specific wireless identification tag.

For example, when the radio recognition tag 1 receives a communication slot request signal transmitted by the specific radio identification tag, the radio identification tag 1 determines the received communication slot request signal. In this process, when the request signal is "0", the communication slot number pre-stored in the memory is extracted and transmitted to the specific RFID tag.

On the other hand, when the request signal is "1", the communication slot number is generated using the chip unique number and / or random block and the generated communication slot number is transmitted to the specific radio recognition tag.

The specific RFID tag receives a communication slot number transmitted from the RFID tag 1 and fixes a slot number for communication between the RFID tag 1 and the RFID tag.

According to a preferred embodiment of the present invention, the wireless recognition tag (1) of the plurality of wireless identification tags (2, 3, 4, ..., N) located around the wireless identification tag (1) by the communication slot At least one specific RFID tag 2 for performing direct data communication is set.

As described above, the radio recognition tag 1 which has transmitted a predetermined data (or RFID information) request signal to the radio recognition tags 2, 3, 4, ..., N has a predetermined radio recognition tag ( Waiting for receiving at least one or more data (or RFID information) corresponding to the request signal from 2, 3, 4, ..., N (730), at least one radio recognition tag (2) It is preferable to maintain a predetermined time until predetermined data (or RFID information) corresponding to the request signal is received from .3, 4, ..., N.

Further, predetermined radio recognition tags 2, 3, 4,..., N, which receive the data (or RFID information) request signal through the communication slot, have predetermined data (or RFID information) corresponding to the request signal. Is extracted from the memory unit provided in the radio recognition tags 2, 3, 4, ..., N and transmitted to the radio identification tag 1 (735).

If predetermined data (or RFID information) corresponding to the data (or RFID information) request signal is received from the RFID tags 2, 3, 4, ..., N (740), the RFID tag 1 ) Determines whether direct data communication between the at least one radio recognition tag (2, 3, 4, ..., N) to which the communication slot is fixed and the radio identification tag is completed (745).

If the direct data communication between the RFID tags has not been completed (750), the RFID tag 1 transmits predetermined data (i) to the RFID tags 2, 3, 4, ..., N through the communication slot. Alternatively, the process of receiving data (or RFID information) corresponding to the request signal from the radio recognition tags 2, 3, 4,..., N after transmitting the request signal is repeated.

On the other hand, if the direct data communication between the RFID tag is completed (755), the RFID tag 1 is predetermined data (or RFID information) received from the RFID tag (2, 3, 4, ..., N) Predetermined data processing (for example, stored in the read / write memory provided in the radio recognition tag 1) for the data (760).

As described above, using the radio tag, there is an advantage that it is possible to efficiently search, extract and share useful information stored in the radio tag between the radio tag.

In addition, by performing the direct data communication between the radio recognition tag, there is an advantage that the faster data can be retrieved.

Claims (4)

In a data direct communication system between radio recognition tags, A radio recognition tag (1) for transmitting a data request signal to one or more radio identification tags (2, 3, 4 ... N); And The radio recognition tag having data requested by the radio identification tag 1 and including a communication slot request signal for allocating a communication slot number to a response signal corresponding to the data request signal of the radio identification tag 1. (1) a specific wireless identification tag of the wireless identification tag (2, 3, 4 ... N) to be transmitted to the wireless identification tag data direct communication system comprising a. The method of claim 1, wherein the radio tag 1 And a communication slot number is assigned to a specific RFID tag among the RFID tags 2, 3, 4 ... N. The method of claim 1, wherein the specific RFID tag, A system for directly communicating data between radio recognition tags, wherein a communication slot number is assigned to the radio identification tag. delete

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