KR20100053190A - Method for writing information of radio frequency identification device - Google Patents

Method for writing information of radio frequency identification device Download PDF

Info

Publication number
KR20100053190A
KR20100053190A KR1020080112206A KR20080112206A KR20100053190A KR 20100053190 A KR20100053190 A KR 20100053190A KR 1020080112206 A KR1020080112206 A KR 1020080112206A KR 20080112206 A KR20080112206 A KR 20080112206A KR 20100053190 A KR20100053190 A KR 20100053190A
Authority
KR
South Korea
Prior art keywords
rfid
information
tag
rfid tag
epc
Prior art date
Application number
KR1020080112206A
Other languages
Korean (ko)
Inventor
최재원
한준수
Original Assignee
삼성테크윈 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성테크윈 주식회사 filed Critical 삼성테크윈 주식회사
Priority to KR1020080112206A priority Critical patent/KR20100053190A/en
Publication of KR20100053190A publication Critical patent/KR20100053190A/en

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/22—Indexing; Data structures therefor; Storage structures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Databases & Information Systems (AREA)
  • Data Mining & Analysis (AREA)
  • Software Systems (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

The present invention relates to an information recording method of an RFID terminal capable of recording a desired information in a plurality of RFID tags by building a database storing tag recording information in an RFID terminal. An information recording method of an RFID terminal is a method of operating an RFID terminal in a system having an RFID tag, an RFID terminal, and a host PC, the method comprising: (a) specifying a designated RFID tag received from the host PC and EPC information to be recorded in the designated RFID tag; Receiving and storing in an internal database; (b) receiving EPC information from an RFID tag first responding to a tag identification command and comparing the EPC information with the EPC information stored in the database; And (c) recording the EPC information stored in the database in the first responding RFID tag when the comparison result shows that the EPC information received from the first responding RFID tag and the EPC information stored in the database are different. .

Description

Information recording method of RFID terminal {Method for writing information of radio frequency identification device}

The present invention relates to an information recording method of an RFID terminal capable of recording a desired information in a plurality of RFID tags by building a database storing tag recording information in an RFID terminal.

RFID is a recognition technology that can manage information of various objects through many IC chips and wireless devices. The device that recognizes the IC chip is called an RFID terminal, and the RFID terminal sends radio signals to read the IC chip information. The IC chip receives energy from the terminal and uses it as energy, and decodes the signal on the radio wave and sends information to the terminal. For this purpose, the antenna is attached to the IC chip to receive energy and signals. The combined IC chip is called an RFID tag.

Although there are various communication protocols (protocols) in the industry between the RFID terminal and the RFID tag, there is a common function to use and manage information of various entities. The function of reading and writing the specific memory of the RFID tag according to the user's choice is common to all protocols. By inserting the code as desired by the user into the memory of the RFID tag, it is possible for the RFID system to use and manage information of various objects.

RFID systems have established rules for accessing the memory of RFID tags and recording user-specified information. The recording method specified in the protocol is as follows.

In the first recording method, as shown in FIG. 5A, in addition to the recording information in the RFID tag, a user receives a code of an RFID tag to be recorded from the user, and selects and records only a specific RFID tag. 2) There are two ways to write information by sending a specific tag to respond, and ② search for all tags, and then send a recognition code for that tag when the matching tag comes in. This makes it possible to record the codes desired by the user in one RFID tag one by one.

The second recording method is a function such as block write, as shown in FIG. 5B, which does not use a block write command specified in the protocol, but receives a memory address, a length, and data to be written to a user and supports the write command. It is a function to write to multiple lengths of memory by sending the write command several times by dividing it into fixed lengths. It is possible to record the same code that the user wants to several RFID tags.

However, there is a problem in that it is impossible to record a code desired by a user in several RFID tags.

The technical problem to be solved by the present invention is to provide an information recording method of the RFID terminal that can record the desired information to a plurality of RFID tags by building a database that stores the tag recording information in the RFID terminal.

An information recording method of an RFID terminal according to a first embodiment for solving the technical problem to be achieved by the present invention is a method of operating an RFID terminal in a system having an RFID tag, an RFID terminal, and a host PC. Receiving a designated RFID tag received from a PC and EPC information to be recorded in the designated RFID tag and storing the received RFID tag in an internal database; (b) receiving EPC information from an RFID tag first responding to a tag identification command and comparing the EPC information with the EPC information stored in the database; And (c) recording the EPC information stored in the database in the first responding RFID tag when the comparison result shows that the EPC information received from the first responding RFID tag and the EPC information stored in the database are different. It is preferable.

In the present invention, (d) after the transmission of the EPC information stored in the database may further comprise the step of confirming the completion of the EPC information recording of the first RFID tag responded.

In the present invention, the database is divided into an EPC information area equal to the number of the designated RFID tags in a queue structure, and the EPC information in which the execution pointer is located may be recorded in the corresponding RFID tag.

An information recording method of an RFID terminal according to a first embodiment for solving the technical problem to be achieved by the present invention is a method of operating an RFID terminal in a system having an RFID tag, an RFID terminal, and a host PC. Receiving a designated RFID tag received from a PC and EPC information to be recorded in the designated RFID tag and storing the received RFID tag in an internal database; (b) identifying the RFID tags with the same UID information from the plurality of RFID tags and transmitting a command to select the RFID tags with the same UID information; And (c) recording EPC information stored in the database in the selected RFID tags in response to a tag identification command.

In the present invention, the database may be divided into EPC information areas equal to the number of the designated RFID tags in a queue structure, and EPC information in which execution pointers are located may be recorded in the corresponding RFID tags.

In the present invention, the method may further include performing a tag identification command on the selected RFID tags not responding to the tag identification command to check whether EPC information is recorded in all selected RFID tags. have.

In the present invention, after performing the identification command again, the RFID tag is not detected, the EPC information is detected, and the execution pointer is located in the EPC information of the database corresponding to the RFID tag to record the EPC information to the RFID tag. Can be.

As described above, according to the present invention, a database storing tag recording information in an RFID terminal can be constructed to record desired information in a plurality of RFID tags.

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

1 is a configuration diagram of an RFID system for recording information on an RFID tag, and includes a host PC 100, an RFID terminal 200 on which a database 250 is constructed, and an RFID tag 300.

The host PC 100 designates the number of RFID tags 300 designated by the user, and generates electronic product code (EPC) information to be recorded in the designated RFID tag 300.

The RFID terminal 200 receives the specified number of RFID tags 300 from the host PC 100, identifies them, receives electronic product code (EPC) information to be recorded from the host PC 100, and transmits them to the internal database 250. Save it.

The structure diagram of the database 250 built in the RFID terminal 200 is shown in FIG. The database 250 is configured in a queue structure so that the first data is used first. The database 250 is divided into the same EPC information area as the number of the designated RFID tags 300. The total number of RFID tags 300 to be recorded corresponds to the number obtained by subtracting the starting pointer address from the ending pointer address. EPC information is located in the RFID tag 100 is located.

The RFID terminal 200 records the EPC information in the RFID tag 300 in the two embodiments recorded in FIGS. 3 and 4.

The RFID tag 300 transmits the corresponding information to the RFID terminal 200 by executing an instruction of the RFID terminal 200 or receives the information from the RFID terminal 200 and records the information in an internal memory (not shown).

The internal memory of the RFID tag 300 is divided into a reserved area in which header information is recorded, an electronic product code (EPC) area, a traffic identification (TID) area, and a user area (user identification (UID) area). In the reserved area, a part for killing a tag and a password for accessing the tag are stored at the time of RFID tag 300 chip production. The EPC area contains the EPC vendor code assigned by the international standardization body, the product family code assigned by the EPC vendor and the unique serial number of the product. The RFID tag 100 manufacturer information is stored in the TID region. In addition to the EPC information, information desired by the user is stored in the user area, that is, the UID area.

The RFID terminal 200 records information in the RFID tag 100 in two ways as shown in FIGS. 3 and 4. The first embodiment shown in FIG. 3 is a method of recording information in the RFID tag 300 by comparing the information stored in the database 250 and the information received from the RFID tag 300 by a post singulation method. 4 illustrates a method of recording information when the codes of the RFID tags 300 are the same by using a select command.

First, the operation of the information recording method of the RFID terminal according to the first embodiment will be described with reference to FIG. 3.

The host PC 100 designates the number of RFID tags 300 to record the EPC information input from the user (step 301), and generates the EPC information to be recorded on the designated RFID tag 300 to the RFID terminal 200. Transmit (step 303).

The RFID terminal 200 stores the EPC information received from the host PC 100 in the internal database 250 (step 305). When information according to a rule is received from the host PC 100, the RFID terminal 200 may store the rule itself or solve the rule. The RFID terminal 200 uses a queue structure so that the EPC information stored first is outputted first when the EPC information is stored in the database 250. A detailed description of the database 250 is disclosed above and thus will be omitted.

When the EPC information storage is completed in the database 250, the RFID terminal 200 performs a tag Inventory command (step 307). Performing the tag inventory command means identifying the RFID tags 300. The RFID terminal 200 selects one of four sessions of the RFID tag 300 and sends a Query command to start an inventory round, and one or more RFID tags 300 respond in response thereto. The Inventory command consists of the Query, QueryAjust, QueryRep, ACK, and NAK commands. The Inventory round runs in only one session at a time.

After the Inventory command is executed, the RFID terminal 200 receives a response signal of the first RFID tag 300 among the plurality of RFID tags 300 and the corresponding RFID tag 300 switches to the access state (step 309). When the RFID terminal 200 receives the first RFID tag 300 response signal, the RFID terminal 300 requests a protocol control (PC), an EPC, and a cyclic redundancy check (CRC). In addition, the access state of the RFID tag 300 indicates that the RFID terminal 200 is ready to issue a read / write command to the RFID tag 300, and the access state includes Req_RN, Read, Write, Kill, Lock, It consists of the Access, Blockwrite, and BlockErase commands.

When the first responding RFID tag 300 receives the PC, the EPC and the CRC, and the first responding RFID tag 300 is in the Access state, the RFID terminal 200 of the first responding RFID tag 300 The EPC information is compared with the EPC information stored in the internal database 250 (step 311).

As a result of the comparison decision, when the EPC information of the first responding RFID tag 300 and the EPC information stored in the internal database 250 are not the same (step 313), the RFID terminal 200 is a tag to record the EPC information. In step 315, the EPC information in which the execution pointer is located in the database 250 is transmitted to the first RFID tag 300.

However, as a result of the comparison decision, when the EPC information of the first responding RFID tag 300 and the EPC information stored in the internal database 250 are the same, the recognized RFID tag 300 may have already recorded or recorded the EPC information. Since there is no need, jump to step 307 to run the tag Inventory command.

Upon receiving the EPC information, the first RFID tag 300 responds with the EPC information to record the EPC information in the internal memory (step 317).

In order to determine whether the EPC information has been recorded in the RFID tag 300 to which the EPC information is first responded, the RFID terminal 200 reads the RFID tag 300 (step 319).

As a result of performing the RFID tag 300 read by the RFID terminal 200, it is determined whether a response signal is received from the RFID tag 300 (step 321). If the response signal is not received from the RFID tag 300, the process jumps to step 315 to transmit the EPC information once again.

However, when receiving the response signal from the RFID tag 300, the RFID terminal 200 determines that the EPC information has been recorded in the first RFID tag 300 responded first, and increases the execution pointer of the database 250 to the next. Place it in the EPC information (step 323).

Subsequently, it is determined whether all EPC information recordings stored in the database 250 have been completed with all the RFID tags 300 that responded (step 325), and if so, the host PC 100 notifies that the recording command has been completed (step 327). When the EPC information recording is completed, the RFID terminal 200 performs an inventory command again to read the RFID tag 300 and re-record the EPC information on the RFID tag 300 which is not recorded. Thereafter, when all RFID tags 300 to be recorded are recognized, the host PC 100 is notified that the recording command has been completed.

Next, an operation of the information recording method of the RFID terminal according to the second embodiment will be described with reference to FIG. 4.

The host PC 100 designates the number of RFID tags 300 to record the EPC information input from the user (step 401), and generates the EPC information to be recorded on the designated RFID tag 300 to the RFID terminal 200. Transmit (step 403).

The RFID terminal 200 stores the EPC information received from the host PC 100 in the internal database 250 (step 405). When information according to a rule is received from the host PC 100, the RFID terminal 200 may store the rule itself or solve the rule. The RFID terminal 200 uses a queue structure so that the EPC information stored first is outputted first when the EPC information is stored in the database 250. A detailed description of the database 250 is disclosed above and thus will be omitted.

When the EPC information storage is completed in the database 250, the RFID terminal 200 performs a tag inventory command to identify the RFID tags 300 having the same UID information (step 407).

When the RFID tags 300 having the same UID information are identified, the RFID terminal 200 performs a select command (step 409). In order for the RFID terminal 200 to identify the RFID tag 300 and give a command to the specific RFID tag 300, the RFID terminal 200 undergoes a Select, Inventory, and Access process. Among these, the Select command is a command issued by the RFID terminal 200 to identify a tag and to select a specific RFID tag 300 group. The SL command of the specific RFID tag 300 group is selected by the Select command of the RFID terminal 200. select flag) value is different. The Inventory and Access commands are described below.

After performing the select command, the RFID terminal 200 performs a tag inventory command (step 411). Performing the tag inventory command means identifying the RFID tags 300. The RFID terminal 200 selects one of four sessions of the RFID tag 300 and sends a Query command to start an inventory round, and one or more RFID tags 300 respond in response thereto. The Inventory command consists of the Query, QueryAjust, QueryRep, ACK, and NAK commands. The Inventory round runs in only one session at a time.

After executing the Select command and the tag inventory command, the RFID terminal 200 determines whether response signals are received from the RFID tags 300 (step 413). When the response signal is received, the RFID terminal 200 performs steps 415 to 421, and when no response signal is received, performs the steps 423 and 425.

When the Select command and the tag Inventory command are executed, the RFID tags 300 having the same UID respond.

The RFID terminal 200 receives response signals from the RFID tags 300, and the corresponding RFID tags 300 transition to the access state (step 415). When the RFID terminal 200 receives the response signals from the RFID tags 300, the RFID tags 300 request the protocol control (PC), the EPC, and the cyclic redundancy check (CRC). In addition, the access state of the RFID tag 300 indicates that the RFID terminal 200 is ready to issue a read / write command to the RFID tags 300, and the access is Req_RN, Read, Write, Kill, Lock. , Access, Blockwrite, BlockErase commands.

After the RFID tags 300 are converted to the access state, the RFID terminal 200 transmits EPC information in which the execution pointer is located in the database 250 to the RFID tags 300 (step 417).

Upon receiving the EPC information, the RFID tags 300 record the EPC information in the internal memory (step 419).

Thereafter, the RFID terminal 200 increases the execution pointer of the database 250 and places it in the next EPC information (step 421). Subsequently, after jumping to step 409, the RFID terminal 200 executes a Select command so that only RFID tags 300 which have not been recorded yet react to record the next EPC information.

After performing the select, if the RFID terminal 200 does not receive response signals from the RFID tags 300, the RFID terminal 200 may estimate that EPC information recording of all the RFID tags 300 is completed.

Therefore, when the response signals are not received from the RFID tags 300 after the select, the RFID terminal 200 performs an inventory command (step 423) to determine whether all the RFID tags 300 on which the EPC information is recorded are read. (Step 425). When all the RFID tags 300 on which the EPC information is recorded have been read, the host PC 100 is notified that the recording command has been completed.

Otherwise, the RFID terminal checks the unrecorded EPC information by executing the tag inventory command, places the execution pointer on the corresponding EPC information, and jumps to step 407 (step 427).

1 is a configuration diagram of an RFID system for recording information on an RFID tag.

2 is a structural diagram of a database provided in an RFID terminal.

3 is a flowchart showing the operation of the information recording method of the RFID terminal according to the first embodiment of the present invention.

4 is a flowchart illustrating an operation of an information recording method of an RFID terminal according to a second embodiment of the present invention.

5 is a view for explaining the information recording method of the RFID terminal according to the prior art.

Claims (7)

A method of operating an RFID terminal in a system having an RFID tag, an RFID terminal, and a host PC, (a) receiving a designated RFID tag received from the host PC and EPC information to be recorded in the designated RFID tag and storing the received RFID tag in an internal database; (b) receiving EPC information from an RFID tag first responding to a tag identification command and comparing the EPC information with the EPC information stored in the database; And and (c) recording the EPC information stored in the database in the first responding RFID tag when the EPC information received from the first responding RFID tag and the EPC information stored in the database are different from each other as a result of the comparison. Information recording method of the terminal. The method of claim 1, and (d) checking whether the first responding RFID tag has finished recording EPC information after transmitting the EPC information stored in the database. The method of claim 1, And the database is divided into an EPC information area equal to the number of the designated RFID tags in a queue structure, and the EPC information where the execution pointer is located is recorded in the corresponding RFID tag. A method of operating an RFID terminal in a system having an RFID tag, an RFID terminal, and a host PC, (a) receiving a designated RFID tag received from the host PC and EPC information to be recorded in the designated RFID tag and storing the received RFID tag in an internal database; (b) identifying the RFID tags with the same UID information from the plurality of RFID tags and transmitting a command to select the RFID tags with the same UID information; And (c) recording EPC information stored in the database in the selected RFID tags in response to a tag identification command. The method of claim 4, wherein And the database is divided into an EPC information area equal to the number of the designated RFID tags in a queue structure, and the EPC information where the execution pointer is located is recorded in the corresponding RFID tag. The method of claim 5, (d) further performing a tag identification command on the selected RFID tags not responding to the tag identification command to check whether EPC information is recorded in all selected RFID tags. How to record information. The method of claim 6, RFID after the identification command is re-executed, the RFID tag has not been recorded, and the execution pointer is positioned as the EPC information of the database corresponding to the RFID tag, and the corresponding EPC information is recorded in the RFID tag. Information recording method of the terminal.
KR1020080112206A 2008-11-12 2008-11-12 Method for writing information of radio frequency identification device KR20100053190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080112206A KR20100053190A (en) 2008-11-12 2008-11-12 Method for writing information of radio frequency identification device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080112206A KR20100053190A (en) 2008-11-12 2008-11-12 Method for writing information of radio frequency identification device

Publications (1)

Publication Number Publication Date
KR20100053190A true KR20100053190A (en) 2010-05-20

Family

ID=42278345

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080112206A KR20100053190A (en) 2008-11-12 2008-11-12 Method for writing information of radio frequency identification device

Country Status (1)

Country Link
KR (1) KR20100053190A (en)

Similar Documents

Publication Publication Date Title
US8362879B2 (en) Apparatus and method for integrated reader and tag
US8222997B2 (en) Method of preventing collisions between RFID readers in RFID system
US20080136599A1 (en) Reader/writer apparatus, data access system, data access control method, and computer product
EP1959579A1 (en) Electronic tag, and electronic tag system
CN101064000B (en) Identification system and identification method
US8044774B1 (en) RFID tag chips and tags able to be partially killed and methods
WO2011009768A2 (en) A method and reader for reading tag data a radio frequency identification system
EP3076340B1 (en) Multi-frequency transponder
US20080106382A1 (en) Bi-slot tree based tag identification method in RFID systems
WO2022252561A1 (en) Card swiping method, card controller, electronic device and storage medium
CN107895131B (en) RFID label checking method in accordance with ISO15693 protocol
CN101369305A (en) Circuit and its model for validating anti-collision function of radio frequency identification tag chip
KR20090087427A (en) Rfid communication method
US20110181398A1 (en) Method for Adjusting the Transmission Time of a Continuous Wave and Reader Thereof
JP4157208B2 (en) Communication control method between control device and control device
KR20090090985A (en) Radio communication apparatus, radio communication method, and storage medium recording program
KR20100053190A (en) Method for writing information of radio frequency identification device
US7307964B2 (en) Contactless communication system and data carrier used for the same
JP5094198B2 (en) Management server, recording medium
JP5989847B2 (en) System for reading data from a plurality of chips equipped with RFID tags
CN103426010B (en) read-write system and method for electronic tag
JP4451667B2 (en) Device and lead device
JP2010021901A (en) Wireless communication system, data reader, wireless ic tag, wireless communication method, an wireless communication program
JP2004248310A (en) Data processing method for rfid tag and interrogator (reader/writer)
JP5905623B2 (en) System and method for reading data from multiple chips with RFID tags

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application