WO2006126768A1 - Method for identifying multiple rfid and module thereof - Google Patents

Method for identifying multiple rfid and module thereof Download PDF

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Publication number
WO2006126768A1
WO2006126768A1 PCT/KR2005/004526 KR2005004526W WO2006126768A1 WO 2006126768 A1 WO2006126768 A1 WO 2006126768A1 KR 2005004526 W KR2005004526 W KR 2005004526W WO 2006126768 A1 WO2006126768 A1 WO 2006126768A1
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WO
WIPO (PCT)
Prior art keywords
rfid code
code
rfid
predefined
module
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Application number
PCT/KR2005/004526
Other languages
French (fr)
Inventor
Weon Kim
Jung-Jung Na
Seung-Wha Yoo
Seung-Jai Yi
Hyoun-Deock Yim
Hyun-Bong Go
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National Internet Development Agency Of Korea
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Publication date
Application filed by National Internet Development Agency Of Korea filed Critical National Internet Development Agency Of Korea
Publication of WO2006126768A1 publication Critical patent/WO2006126768A1/en

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Classifications

    • 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
    • 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
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • 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
    • G06K7/10297—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 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
    • H04B5/48—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field

Definitions

  • the present invention relates, in general, to a multiple RFID code identification method and module, and, more particularly, to a multiple RFID code identification method and module for directory services that are capable of identifying various types of RFID code regardless of code policies related to RFID code structures, such as Electronic Product Code (EPC) , International Organization for Standardization (ISO) /International Electrotechnical Commission (IEC) -defined code, and ucode.
  • EPC Electronic Product Code
  • ISO International Organization for Standardization
  • IEC International Electrotechnical Commission
  • Radio Frequency Identification (RFID) technology is one of the automatic identification data capture technology.
  • RFID technology stores product identification information etc. in a very small RFID tag, transmits product and surrounding information to a network through an antenna and a reader using wireless frequencies, and causes the information to be processed.
  • RFID technology is a promising technology that will lead the information technology market from human-centric information toward product-centric information.
  • RFID technology has universality that allows the technology to be easily applied to various fields in different frequency bands, and is a new distribution network technology that will replace barcodes from a microscopic point of view.
  • RFID technology is next-generation core technology that can be applied to various fields, such as information and communications, logistics, distribution, supply networks, traffic, environment and the maintenance of public peace, from a macroscopic point of view.
  • Representative RFID code includes EPC of EPCglobal, ISO/IEC-defined code and ucode of uID Center. Depending on need, additional RFID codes may also appear in the future. When multiple types of RFID code exist on a single RFID network, a problem occurs in that specific RFID codes cannot be recognized.
  • an object of the present invention is to provide a method capable of identifying conventional RFID codes and any future RFID codes that is performed in a multi-code directory service system capable of identifying multiple RFID codes, and a module capable of identifying conventional RFID codes and any future RFID codes that is mounted and used to construct the multi-code directory service system capable of identifying conventional RFID codes and any future RFID codes.
  • a first embodiment of the present invention provides an RFID code identification method capable of identifying n types of RFID code, including the steps of reading RFID code ⁇ through a reader; inputting a subset X' ⁇ of intrinsic attributes obtained from the read RFID code ⁇ into a universal set Y ⁇ of intrinsic attributes of the RFID code ⁇ ; determining whether any one element E (C (Y 0 J) of the power set C(Y 01 ) of Y ⁇ is included in C(X 1 ) that is predefined to be uniquely identified, so as to uniquely identify the RFID code ⁇ ; and performing a predetermined process corresponding to RFID code i if the element E(C(Y 01 )) of the power set C(Y 01 ) of Y ⁇ is included in the predefined C(X 1 ) to identify the RFID code ⁇ .
  • the multiple RFID code identification method further includes the step of executing an exception process if the element E(C(Y ⁇ )) corresponding to the predefined C(X 1 ) does not exist.
  • the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
  • i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
  • a second embodiment of the present invention provides a multiple RFID code identification method capable of identifying n types of RFID code, including the steps of reading RFID code ⁇ through a reader; inputting a subset X' ⁇ of intrinsic attributes obtained from the read RFID code ⁇ into a universal set Y 0 of intrinsic attributes of the RFID code ⁇ ; determining whether any one element E(C(Y ⁇ )) of the power set C(Y ⁇ ) of Y ⁇ is included in C(X 1 ) that is predefined to be uniquely identified, so as to uniquely identify the RFID code ⁇ ; performing a predetermined process corresponding to RFID code i if the element E(C(Y 0 )) of the power set C(Y ⁇ ) of Y ⁇ is included in the predefined C(X 1 ) so as to identify the RFID code ⁇ ; and returning to the step of determining whether any one element E(C(Y 0 )) of the power set C(Y 0 ) of Y ⁇ is included in the predefined C(X
  • the RFID code identification method further includes the step of executing an exception process if the element E(C(Y 0 )) corresponding to the predefined C(X 1 ) does not exist.
  • the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
  • i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
  • a third embodiment of the present invention provides a module for executing a multiple RFID code identification program for performing a multiple RFID code identification method capable of identifying n types of RFID code, the method including the steps of reading RFID code ⁇ through a reader; inputting a subset X' ⁇ of intrinsic attributes obtained from the read RFID code ⁇ into a universal set Y ⁇ of intrinsic attributes of the RFID code ⁇ ; determining whether any one element E(C(Y 0 )) of the power set C(Y 0 ) of Y ⁇ is included in C(Xi) that is predefined to be uniquely identified, so as to uniquely identify the RFID code ⁇ ; and performing a predetermined process corresponding to RFID code i if the element E(C(Y 0 )) of the power set C(Y ⁇ ) of Y ⁇ is included in the predefined C(X 1 ) to identify the RFID code ⁇ .
  • the module further includes the step of executing an exception process if the element E(C(Y 0 )) corresponding to the predefined C(Xi) does not exist.
  • the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
  • a fourth embodiment of the present invention provides a module for executing a multiple RFID code identification program for performing a multiple RFID code identification method capable of identifying n types of RFID code, the method including the steps of reading RFID code ⁇ through a reader; inputting a subset X' ⁇ of intrinsic attributes obtained from the read RFID code ⁇ into a universal set Y ⁇ of intrinsic attributes of the RFID code ⁇ ; determining whether any one element E(C(Y ⁇ )) of the power set C(Y ⁇ ) of Y ⁇ is included in C(X 1 ) that is predefined to be uniquely identified, so as to uniquely identify the RFID code ⁇ ; performing a predetermined process corresponding to RFID code i if the element E(C(Y 0 )) of the power set C(Y ⁇ ) of Y ⁇ is included in the predefined C(X 1 ) so as to identify the
  • the module further includes the step of executing an exception process if the element E(C(Y 0 )) corresponding to the predefined C(X 1 ) does not exist.
  • the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
  • i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
  • the present invention is advantageous in that problems in which an organic association with an Internet network infrastructure that provides service restricted to a single code policy is not achieved, and additional cost is incurred due to the establishment of separate directory services for respective types of code are overcome, so that it can provide service capable of integrally processing all types of RFID code, and in that the respective RFID code identification parts of an algorithm are modularized in consideration of the future insertion of new RFID codes into a multiple RFID code identification module and the future modification of existing RFID codes, so that the maintenance of the multiple RFID code identification module is facilitated.
  • FIG. 1 is a flowchart of a multiple RFID code identification algorithm according to an embodiment of the present invention
  • FIG. 2 is a diagram illustrating the basic configurations of three types of RFID code according to the present invention.
  • FIG. 3 is a flowchart illustrating a process in which a multi-code directory service examines a code assignment system according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a multiple RFID code identification algorithm according to an embodiment of the present invention. The present invention is performed through the following process including the following steps :
  • E(C(Y ⁇ )) of the power set C(Y 01 ) of Y a is included in C(Xi) that is predefined to be uniquely identified, so as to uniquely identify the RFID code ⁇ ;
  • ⁇ represents intrinsic attributes of the RFID, and there is a plurality of intrinsic attributes.
  • the subset X' ⁇ of intrinsic attributes is ⁇ length ⁇ , ⁇ header ⁇ , ⁇ characteristic ⁇ , etc. when the unique attributes, that is, length, header, characteristic, etc., read at step SlO are viewed from the point of view of the concept "set". Accordingly, ⁇ length ⁇ , ⁇ header ⁇ , ⁇ characteristic ⁇ , etc. is input into the universal set Y ⁇ of intrinsic attributes. That is, Y ⁇ is ⁇ length ⁇ , ⁇ header ⁇ , ⁇ characteristic ⁇ , etc. ⁇ .
  • E(C(Y ⁇ )) of the power set C(YJ of Y a is included in C(X 1 ) that is predefined to be uniquely identified, so as to uniquely identify the RFID code ⁇
  • the power set C(YJ that can be created using the set Y ⁇ that is, ⁇ length ⁇ , ⁇ header ⁇ , ⁇ characteristic ⁇ , etc. ⁇
  • the power set C(YJ that can be created using the set Y ⁇ that is, ⁇ length ⁇ , ⁇ header ⁇ , ⁇ characteristic ⁇ , ⁇ length, header ⁇ , ⁇ header, characteristic ⁇ , ⁇ length, header, characteristic ⁇ , etc. ⁇
  • whether one element E(C(Y 0 )) of the power set C(Y 0 ) for example, ⁇ length, header ⁇ , is included in the predefined C(X 1 ) is determined.
  • C(X 1 ) is an i th RFID code system attribute set that is constructed to uniquely identify an input RFID code.
  • C(Xi) ⁇ EPC length 1, EPC header 1 ⁇ , ⁇ EPC length 2, EPC header 2, EPC characteristic 2 ⁇ , ⁇ EPC length 3, EPC characteristic 3 ⁇ , etc. ⁇
  • C(X 2 ) ⁇ ucode length 1, ucode characteristic 1 ⁇ , ⁇ ucode length 2, ucode characteristic 2 ⁇ , ⁇ ucode length 3, ucode header 3, ucode characteristic 3 ⁇ , etc. ⁇
  • C(X n ) ⁇ n th length 1, n th headerl, n th characteristic 1 ⁇ , ⁇ n th length 2, n th header 2, n th characteristic 2 ⁇ , ⁇ n th length 3, n th header 3, n th characteristic 3 ⁇ , etc. ⁇
  • a corresponding RFID code characteristic attribute is ascertained such that an EPC process is performed if the element ⁇ length, header ⁇ of Y ⁇ exists in C(Xi) and a process corresponding to i is performed if the element ⁇ length, header ⁇ exists in C(X 1 ).
  • Step S40 of returning to step S30 after adding 1 to i if the element E(C(Y n )) is not included in the predefined C(X 1 ) determines whether the element E(C(Y n )) corresponds to other types of RFID code while repeatedly adding 1 to i of C(X 1 ) in such a way as to determine whether the element E(C(Y n )) exists in initial C (Xi), determine whether the element E(C(Y n )) exists in C(X 2 ) if the element E(C(Y n )) does not exist in initial C(Xi), and determine whether the element E(C(Y n )) exists in C(X 3 ) if the element E(C(Y n )) does not exist in initial C(X 2 ).
  • Step S50 of executing an exception process if the element E(C(Y n )) corresponding to the predefined C(X 1 ) does not exist is configured to execute an exception process if there is no match for E(C(Y n )) as a result of the termination while adding 1 up to i, that is, from C(Xi) to C(X n ).
  • FIG. 2 is a diagram illustrating the basic configurations of three types of RFID code according to the present invention.
  • the three types of RFID code are representative types of code that are most frequently identified by the RFID code identification module of the present invention. Standardization related to RFID is as follows .
  • the basic structure of ISO/IEC 15459 includes a symbology identifier, 100, a class identification 101 and an unique identifier 103.
  • ISO/IEC establishes ISO/IEC 15459 as one of the standards made by WG4 of JTC1/SC31 so as to use RFID technology as product identifiers.
  • the symbology identifier 100 is used for an identification algorithm or special features, and was issued by Advanced Information Management United States of America (AIM USA) .
  • the class identification 101 is used to identify one of the products according to the special rules of each class.
  • ISO/IEC 15418 and ISO/IEC 9834-1 define three methods of distinguishing classes using specific characters or character strings that define the structures and meanings of data that are attached to the rear ends .
  • the unique identifier 103 is an identifier that is assigned to each product by an issuing agency.
  • the unique identifier 103 is issued according to the regulations of ISO/IEC 15459-2 and the issuing agency.
  • the issuing agency must be registered with a Registration Authority (RA) and be authenticated.
  • the unique identifier 103 must begin with an Issuing Agency Code (IAC) that is assigned to an issuing agency by the RA.
  • IAC Issuing Agency Code
  • the IAC is composed of characters, has a format defined by the issuing agency, and must guarantee uniqueness for a sufficient period of time.
  • the basic structure of EPCgobal includes a header 105 and a domain identifier 107.
  • EPCglobal currently takes charge of the management of EPC.
  • a general EPC consists of a fixed-length header and successive numerals. Since the detailed structure and function of the domain identifier 107 are determined by the value of the header 105, some differences may arise according to encoding method.
  • the domain identifier 107 is divided into a domain manager 109, an object class 111 and a serial number 113.
  • the domain manager 109 identifies the manager of the EPC.
  • the domain manager 109 is assigned to an agency or company that manages object classes and identification numbers.
  • the object class 111 represents the group or class of an object. The entity of the domain manager must guarantee uniqueness by assigning object class numbers without duplication within a range managed by the domain manager.
  • the serial number 113 represents the unique number of each product, and is assigned by the domain manager, like the object class 111.
  • the basic structure of ucode consists of a code identifier 215, an JAN code segment 117 and a unique identifier 119.
  • ucode is tag ID code proposed by Japanese uID center, and has a size of 128 bits. When necessary, ucode may be extended to 256 bits, 384 bits or 512 bits from the 128 bits.
  • the size of ucode that is, 128 bits, can accommodate International Standard Cipheral Numbers (ISBN) and International Standard Serial Number (ISSN) publication ID as well as existing bar code systems such as Japanese Article Number (JAN) , European Article Number (EAN) and Universal Product Code (UPC) .
  • ISBN International Standard Cipheral Number
  • ISSN International Standard Serial Number
  • JAN Japanese Article Number
  • EAN European Article Number
  • UPC Universal Product Code
  • the size of ucode can widely accommodate IP addresses assigned to respective hosts for Internet connections and general phone numbers.
  • the first 12 bits are used as the code identifier 115.
  • the second 52 bits are occupied by the JAN code segment 117.
  • JAN code is a type of bar code that is used to identify types of products, like UPC EAN, and is a representative product code of Japan.
  • the JAN code segment 117 performs the same function as the domain manager and object class of EPC.
  • the unique identifier 119 has a 64-bit size, and is used to assign unique numbers to respective products .
  • [Table 1] and [Table 2] illustrate the comparisons between the header values, class values and lengths of ISO/IEC 15459, EPCgobal and ucode according to the present invention.
  • the class value of ISO/IEC consists of numeric and alphabetic characters composed of American Standard Code for Information Interchange (ASCII) codes, so that the value of ⁇ 0' having the lowest ASCII value is ⁇ 0110 0000' in view of the fact that the last of 8 bits is a parity bit; therefore it can be seen that a conflict with the EPCglobal system does not occur. Accordingly, when distinctions are made using the classification illustrated in FIG. 2, respective types of code can be easily distinguished from each other.
  • ASCII American Standard Code for Information Interchange
  • FIG. 3 is a flowchart illustrating a process in which the multi-code directory service examines a code assignment system according to an embodiment of the present invention. This drawing shows an embodiment that illustrates the process in which the code assignment system is examined in the multi-code directory service using the multiple RFID code identification module, which includes the following steps.
  • the process includes:
  • the provision of the directory service is denied because the multi-code directory service system cannot provide the directory service thereto.
  • the multiple RFID code identification module in which the multiple RFID code identification algorithm is installed may exist in any one of the various forms according to RFID network environment, the multiple RFID code identification module can be used in components where the installation of the multiple RFID code identification algorithm is necessary, such as middleware or a directory system.
  • middleware When the multi-code directory service system examines a code type after receiving an RFID code, both accuracy and efficiency must be guaranteed.
  • the multi-code directory service system must process queries several dozen times more than those processed by a DNS in light of the characteristics of the RFID network.
  • the code identification algorithm used in the multi-code directory service system is adapted to process code having a high-use frequency.
  • Organizations that are most rapidly conducting standardization work are EPCglobal and ISO/IEC.

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Abstract

The present invention relates, in general, to a multiple RFID code identification method and module, and, more particularly, to a multiple RFID code identification method and module for directory services that are capable of identifying various types of RFID code regardless of code policies related to RFID code structures, such as Electronic Product Code (EPC) , International Organization for Standardization (ISO) /International Electrotechnical Commission (IEC) -defined code, and ucode. The present invention provides a method that is performed in a multi- code directory service system capable of identifying multiple RFID codes and can identify conventional RFID codes and future RFID codes, so that the respective RFID code identification parts of an algorithm are modularized in consideration of the future insertion of new RFID codes into a multiple RFID code identification module and the future modification of existing RFID codes. Through this, the maintenance of the multiple RFID code identification module is facsilitated.

Description

[DESCRIPTION]
[invention Title]
METHOD FOR IDENTIFYING MULTIPLE RFID AND MODULE THEREOF
[Technical Field]
The present invention relates, in general, to a multiple RFID code identification method and module, and, more particularly, to a multiple RFID code identification method and module for directory services that are capable of identifying various types of RFID code regardless of code policies related to RFID code structures, such as Electronic Product Code (EPC) , International Organization for Standardization (ISO) /International Electrotechnical Commission (IEC) -defined code, and ucode.
[Background Art]
Radio Frequency Identification (RFID) technology is one of the automatic identification data capture technology. RFID technology stores product identification information etc. in a very small RFID tag, transmits product and surrounding information to a network through an antenna and a reader using wireless frequencies, and causes the information to be processed. Furthermore, RFID technology is a promising technology that will lead the information technology market from human-centric information toward product-centric information. RFID technology has universality that allows the technology to be easily applied to various fields in different frequency bands, and is a new distribution network technology that will replace barcodes from a microscopic point of view. Furthermore, RFID technology is next-generation core technology that can be applied to various fields, such as information and communications, logistics, distribution, supply networks, traffic, environment and the maintenance of public peace, from a macroscopic point of view.
Currently, EPCglobal, ISO/IEC, and Ubiquitous ID (uID) Center of Japan are separately developing RFID code policies related to RFID code structures However, since these policies differ according to organization, the difference is an obstacle to the construction of a global RFID environment. Therefore, accompanying problems occur in that the RFID technology cannot be organically combined with an Internet infrastructure and a separate directory service must be constructed. From medium- and long-term perspectives, the RFID policies need to be unified so as to solve the above problems. Until the RFID policies are unified, an integrated environment enabling all codes to be read is necessary. Furthermore, the work of unifying the RFID policies requires a long period of time.
Representative RFID code includes EPC of EPCglobal, ISO/IEC-defined code and ucode of uID Center. Depending on need, additional RFID codes may also appear in the future. When multiple types of RFID code exist on a single RFID network, a problem occurs in that specific RFID codes cannot be recognized.
[Disclosure] [Technical Problem]
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a method capable of identifying conventional RFID codes and any future RFID codes that is performed in a multi-code directory service system capable of identifying multiple RFID codes, and a module capable of identifying conventional RFID codes and any future RFID codes that is mounted and used to construct the multi-code directory service system capable of identifying conventional RFID codes and any future RFID codes.
[Technical Solution] In order to accomplish the above objects, a first embodiment of the present invention provides an RFID code identification method capable of identifying n types of RFID code, including the steps of reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α; determining whether any one element E (C (Y0J) of the power set C(Y01) of Yα is included in C(X1) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; and performing a predetermined process corresponding to RFID code i if the element E(C(Y01)) of the power set C(Y01) of Yα is included in the predefined C(X1) to identify the RFID code α. According to the first embodiment of the present invention, the multiple RFID code identification method further includes the step of executing an exception process if the element E(C(Yα)) corresponding to the predefined C(X1) does not exist. According to the first embodiment of the present invention, the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
According to the first embodiment of the present invention, i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
A second embodiment of the present invention provides a multiple RFID code identification method capable of identifying n types of RFID code, including the steps of reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Y0 of intrinsic attributes of the RFID code α; determining whether any one element E(C(Yα)) of the power set C(Yα) of Yα is included in C(X1) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; performing a predetermined process corresponding to RFID code i if the element E(C(Y0)) of the power set C(Yα) of Yα is included in the predefined C(X1) so as to identify the RFID code α; and returning to the step of determining whether any one element E(C(Y0)) of the power set C(Y0) of Yα is included in the predefined C(X1) after adding 1 to i if the element E(C(Y0)) is not included in the predefined C(X1). According to the second embodiment of the present invention, the RFID code identification method further includes the step of executing an exception process if the element E(C(Y0)) corresponding to the predefined C(X1) does not exist. According to the second embodiment of the present invention, the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
According to the second embodiment of the present invention, i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
A third embodiment of the present invention provides a module for executing a multiple RFID code identification program for performing a multiple RFID code identification method capable of identifying n types of RFID code, the method including the steps of reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α; determining whether any one element E(C(Y0)) of the power set C(Y0) of Yα is included in C(Xi) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; and performing a predetermined process corresponding to RFID code i if the element E(C(Y0)) of the power set C(Yα) of Yα is included in the predefined C(X1) to identify the RFID code α.
According to the third embodiment of the present invention, the module further includes the step of executing an exception process if the element E(C(Y0)) corresponding to the predefined C(Xi) does not exist.
According to the third embodiment of the present invention, the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
According to the third embodiment of the present invention, i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence. A fourth embodiment of the present invention provides a module for executing a multiple RFID code identification program for performing a multiple RFID code identification method capable of identifying n types of RFID code, the method including the steps of reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α; determining whether any one element E(C(Yα)) of the power set C(Yα) of Yα is included in C(X1) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; performing a predetermined process corresponding to RFID code i if the element E(C(Y0)) of the power set C(Yα) of Yα is included in the predefined C(X1) so as to identify the RFID code α; and returning to the step of determining whether any one element E(C(Yn)) of the power set C(Yα) of Yα is included in the predefined C(X1) after adding 1 to i if the element E(C(Y0)) is not included in the predefined C(X1).
According to the fourth embodiment of the present invention, the module further includes the step of executing an exception process if the element E(C(Y0)) corresponding to the predefined C(X1) does not exist.
According to the fourth embodiment of the present invention, the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
According to the fourth embodiment of the present invention, i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
[Advantageous Effects]
As described above, the present invention is advantageous in that problems in which an organic association with an Internet network infrastructure that provides service restricted to a single code policy is not achieved, and additional cost is incurred due to the establishment of separate directory services for respective types of code are overcome, so that it can provide service capable of integrally processing all types of RFID code, and in that the respective RFID code identification parts of an algorithm are modularized in consideration of the future insertion of new RFID codes into a multiple RFID code identification module and the future modification of existing RFID codes, so that the maintenance of the multiple RFID code identification module is facilitated. [Description of Drawings]
FIG. 1 is a flowchart of a multiple RFID code identification algorithm according to an embodiment of the present invention; FIG. 2 is a diagram illustrating the basic configurations of three types of RFID code according to the present invention; and
FIG. 3 is a flowchart illustrating a process in which a multi-code directory service examines a code assignment system according to an embodiment of the present invention.
[Best Mode]
Preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. First, principal abbreviations used to describe the present invention are defined as follows:
AIDC Automatic Identification and Data Capture CI Class Identification DNS Domain Name Service EAN European Article Number EPC Electronic Product Code ISBN International Standard Book Number ISO/IEC International Organization for Standardization /International Electrotechnical Commission
ISSN International Standard Serial Number
JAN Japanese Article Number
MDS Multi-code Directory Service
RA Registration Authority
SI Symbology Identifier uID Ubiquitous IDentification
UID Unique Identifier
UPC Universal Product Code
FIG. 1 is a flowchart of a multiple RFID code identification algorithm according to an embodiment of the present invention. The present invention is performed through the following process including the following steps :
Step SlO of reading RFID code α through a reader;
Step S20 of inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α;
Step S30 of determining whether any one element
E(C(Yα)) of the power set C(Y01) of Ya is included in C(Xi) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α;
Steps S60 and S70 of performing a predetermined process corresponding to RFID code i if the element E(C(Yα)) of the power set C(Yn) of Yα is included in the predefined C(X1) to identify the RFID code α;
Step S40 of returning to step S30 after adding 1 to i if the element E(C(Yα)) is not included in the predefined C(X1); and
Step S50 of executing an exception process if the element E(C(Yα)) corresponding to the predefined C(X1) does not exist.
Symbols and indications used to perform the respective steps are described as follows: α: intrinsic attributes that an RFID code has X'α: subset of intrinsic attributes obtained from α Ya: universal set of intrinsic attributes that α has C(YQ) : power set of Ya E(C(Ya)): one element of C(Ya) i: ith RFID code system priority set according to the frequency of occurrence (i ranges from 1 to n, n=natural number)
C(X1): ith RFID code system attribute set created to uniquely identify input RFID code
In more detail, at step SlO of reading the RFID code α through the reader, α represents intrinsic attributes of the RFID, and there is a plurality of intrinsic attributes.
That is, when α has an intrinsic attributes such as a length, a header, and a characteristic, these are read as a single entity. At step S20 of inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α, the subset X'α of intrinsic attributes is {length}, {header}, {characteristic}, etc. when the unique attributes, that is, length, header, characteristic, etc., read at step SlO are viewed from the point of view of the concept "set". Accordingly, {length}, {header}, {characteristic}, etc. is input into the universal set Yα of intrinsic attributes. That is, Yα is {{length}, {header}, {characteristic}, etc.}.
At step S30 of determining whether the element
E(C(Yα)) of the power set C(YJ of Ya is included in C(X1) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α, the power set C(YJ that can be created using the set Yα, that is, {{length}, {header}, {characteristic}, etc.}, is {ø, {length}, {header}, {characteristic}, {length, header}, {header, characteristic}, {length, header, characteristic}, etc.}, and whether one element E(C(Y0)) of the power set C(Y0), for example, {length, header}, is included in the predefined C(X1) is determined.
That is, C(X1) is an ith RFID code system attribute set that is constructed to uniquely identify an input RFID code.
C(Xi) = {{EPC length 1, EPC header 1}, {EPC length 2, EPC header 2, EPC characteristic 2}, {EPC length 3, EPC characteristic 3}, etc.}
C(X2) = {{ucode length 1, ucode characteristic 1}, {ucode length 2, ucode characteristic 2}, {ucode length 3, ucode header 3, ucode characteristic 3}, etc.}
C(X1) = {{ith length 1, ith header 1}, ith header 2, ith characteristic 2}, {ith length 3, ith header 3, ith characteristic 3}, etc.}
C(Xn) = {{nth length 1, nth headerl, nth characteristic 1}, {nth length 2, nth header 2, nth characteristic 2}, {nth length 3, nth header 3, nth characteristic 3}, etc.}
Accordingly, a corresponding RFID code characteristic attribute is ascertained such that an EPC process is performed if the element {length, header} of Yα exists in C(Xi) and a process corresponding to i is performed if the element {length, header} exists in C(X1).
At steps S60 and S70 of performing a predetermined process corresponding to RFID code i to identify the RFID code α if any one element E(C(Yα)) of the power set C(Yα) of Yα is included in the predefined C(X1), C(X1) allows the most common and representative type of RFID code to have the highest priority, and, as described in conjunction with step S30, a process corresponding to EPC is performed if the element E(C(Yα)) of Yα exists in C(Xi) and a process corresponding to i is performed if the element E(C(Y0)) exists in C (X1) . Step S40 of returning to step S30 after adding 1 to i if the element E(C(Yn)) is not included in the predefined C(X1) determines whether the element E(C(Yn)) corresponds to other types of RFID code while repeatedly adding 1 to i of C(X1) in such a way as to determine whether the element E(C(Yn)) exists in initial C (Xi), determine whether the element E(C(Yn)) exists in C(X2) if the element E(C(Yn)) does not exist in initial C(Xi), and determine whether the element E(C(Yn)) exists in C(X3) if the element E(C(Yn)) does not exist in initial C(X2).
Step S50 of executing an exception process if the element E(C(Yn)) corresponding to the predefined C(X1) does not exist is configured to execute an exception process if there is no match for E(C(Yn)) as a result of the termination while adding 1 up to i, that is, from C(Xi) to C(Xn).
FIG. 2 is a diagram illustrating the basic configurations of three types of RFID code according to the present invention. The three types of RFID code are representative types of code that are most frequently identified by the RFID code identification module of the present invention. Standardization related to RFID is as follows .
De jure Standard: ISO/IEC De facto Standard: EPCglobal, uID center
First, the basic structure of ISO/IEC 15459 includes a symbology identifier, 100, a class identification 101 and an unique identifier 103. ISO/IEC establishes ISO/IEC 15459 as one of the standards made by WG4 of JTC1/SC31 so as to use RFID technology as product identifiers. The symbology identifier 100 is used for an identification algorithm or special features, and was issued by Advanced Information Management United States of America (AIM USA) .
The class identification 101 is used to identify one of the products according to the special rules of each class. ISO/IEC 15418 and ISO/IEC 9834-1 define three methods of distinguishing classes using specific characters or character strings that define the structures and meanings of data that are attached to the rear ends . The unique identifier 103 is an identifier that is assigned to each product by an issuing agency. The unique identifier 103 is issued according to the regulations of ISO/IEC 15459-2 and the issuing agency. The issuing agency must be registered with a Registration Authority (RA) and be authenticated. The unique identifier 103 must begin with an Issuing Agency Code (IAC) that is assigned to an issuing agency by the RA. The IAC is composed of characters, has a format defined by the issuing agency, and must guarantee uniqueness for a sufficient period of time. The basic structure of EPCgobal includes a header 105 and a domain identifier 107. Although Massachusetts Institute of Technology's Auto ID Center developed EPC, EPCglobal currently takes charge of the management of EPC. A general EPC consists of a fixed-length header and successive numerals. Since the detailed structure and function of the domain identifier 107 are determined by the value of the header 105, some differences may arise according to encoding method.
The domain identifier 107 is divided into a domain manager 109, an object class 111 and a serial number 113. The domain manager 109 identifies the manager of the EPC. The domain manager 109 is assigned to an agency or company that manages object classes and identification numbers. The object class 111 represents the group or class of an object. The entity of the domain manager must guarantee uniqueness by assigning object class numbers without duplication within a range managed by the domain manager. The serial number 113 represents the unique number of each product, and is assigned by the domain manager, like the object class 111. The basic structure of ucode consists of a code identifier 215, an JAN code segment 117 and a unique identifier 119. ucode is tag ID code proposed by Japanese uID center, and has a size of 128 bits. When necessary, ucode may be extended to 256 bits, 384 bits or 512 bits from the 128 bits.
The size of ucode, that is, 128 bits, can accommodate International Standard Bibliographic Numbers (ISBN) and International Standard Serial Number (ISSN) publication ID as well as existing bar code systems such as Japanese Article Number (JAN) , European Article Number (EAN) and Universal Product Code (UPC) . Moreover, the size of ucode can widely accommodate IP addresses assigned to respective hosts for Internet connections and general phone numbers.
The first 12 bits are used as the code identifier 115. The second 52 bits are occupied by the JAN code segment 117. JAN code is a type of bar code that is used to identify types of products, like UPC EAN, and is a representative product code of Japan. The JAN code segment 117 performs the same function as the domain manager and object class of EPC. The unique identifier 119 has a 64-bit size, and is used to assign unique numbers to respective products .
[Table 1] and [Table 2] illustrate the comparisons between the header values, class values and lengths of ISO/IEC 15459, EPCgobal and ucode according to the present invention.
[Table 1]
Figure imgf000019_0001
Figure imgf000020_0001
[Table 2]
Figure imgf000020_0002
In [Table 1] and [Table 2], the class value of ISO/IEC consists of numeric and alphabetic characters composed of American Standard Code for Information Interchange (ASCII) codes, so that the value of λ0' having the lowest ASCII value is Λ0110 0000' in view of the fact that the last of 8 bits is a parity bit; therefore it can be seen that a conflict with the EPCglobal system does not occur. Accordingly, when distinctions are made using the classification illustrated in FIG. 2, respective types of code can be easily distinguished from each other.
In order to ascertain the location of an information server associated with an RFID code received by a local directory server in a global RFID network environment, which code system is being used by the corresponding code must be first determined. Organizations that are most actively performing standardization work currently are EPCglobal and ISO/IEC. All of the RFID code assignment systems proposed by AEPCglobal, except for the SGTIN-64 system of EPCglobal having a 2-bit length header, have an 8-bit length header item. The system proposed by ISO/IEC has a 1~4 numeral or character class item, that is, an 8~32 bit class item. Accordingly, by using such characteristics, a corresponding code assignment system can be ascertained.
Accordingly, in the case of distinguishing EPC from ISO/IEC code, the distinction can be made by comparing the bit strings of headers or classes with each other without examining the content of the entire RFID code. Meanwhile, ucode has a length equal to or longer than 128 bits, unlike the above-described code systems. Accordingly, in order to distinguish ucode from other types of code, distinctions may be made on the basis of entire length. FIG. 3 is a flowchart illustrating a process in which the multi-code directory service examines a code assignment system according to an embodiment of the present invention. This drawing shows an embodiment that illustrates the process in which the code assignment system is examined in the multi-code directory service using the multiple RFID code identification module, which includes the following steps.
The process includes:
Step SlOO of examining whether an RFID code corresponds to commercialized EPC when the RFID code is input; Step S200 of examining whether the RFID code corresponds to ISO 15459 after the examination regarding EPC; and
Step S300 of examining whether the RFID code corresponds to ucode after the examination regarding ISO 15459.
For the RFID code that is determined not to meet the criteria of EPC, ISO or ucode, the provision of the directory service is denied because the multi-code directory service system cannot provide the directory service thereto.
Since the multiple RFID code identification module in which the multiple RFID code identification algorithm is installed may exist in any one of the various forms according to RFID network environment, the multiple RFID code identification module can be used in components where the installation of the multiple RFID code identification algorithm is necessary, such as middleware or a directory system. When the multi-code directory service system examines a code type after receiving an RFID code, both accuracy and efficiency must be guaranteed. The multi-code directory service system must process queries several dozen times more than those processed by a DNS in light of the characteristics of the RFID network. For rapid code analysis, the code identification algorithm used in the multi-code directory service system is adapted to process code having a high-use frequency. Organizations that are most rapidly conducting standardization work are EPCglobal and ISO/IEC. Accordingly, it is expected that the standard schemes of these two organizations will be commercialized prior to other schemes, so that the multi-code directory service system first examines whether the EPC or ISO/IEC system has been used prior to the examination of whether other code assignment systems have been used. It should be noted that, although the present invention has been described in detail up to now, the embodiments described above are only illustrative, not restrictive. Within the range that does not depart from the spirit or scope of the present invention provided by the following claims, the change of elements, which is equivalent to the present invention, falls within the scope of the present invention.

Claims

[CLAIMS]
[Claim l]
A multiple Radio Frequency Identification (RFID) code identification method capable of identifying n types of RFID code, comprising the steps of: reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α; determining whether any one element E(C(Yα)) of the power set C(Yα) of Yα is included in C(X1) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; and performing a predetermined process corresponding to RFID code i if the element E(C(Y0)) of the power set C(YJ of Yα is included in the predefined C(X1) to identify the RFID code α.
[Claim 2]
The multiple RFID code identification method as set forth in claim 1, further comprising the step of executing an exception process if the element E(C(Y0)) corresponding to the predefined C(X1) does not exist.
[Claim 3]
The multiple RFID code identification method as set forth in claim 1, wherein the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
[Claim 4] The multiple RFID code identification method as set forth in any one of claim 1 to 3, wherein i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
[Claim 5] A multiple RFID code identification method capable of identifying n types of RFID code, comprising the steps of: reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α; determining whether any one element E(C(Y0)) of the power set C(Y0) of Yα is included in C(Xi) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; performing a predetermined process corresponding to RFID code i if the element E(C(Y0)) of the power set C(Y0) of Yα is included in the predefined C(Xi) so as to identify the RFID code α; and returning to the step of determining whether any one element E(C(Y0)) of the power set C(Y0) of Yα is included in the predefined C(Xi) after adding 1 to i if the element E(C(Yα)) is not included in the predefined C(Xi). [Claim β]
The multiple RFID code identification method as set forth in claim 5, further comprising the step of executing an exception process if the element E(C(Y0)) corresponding to the predefined C(Xi) does not exist.
[Claim 7]
The multiple RFID code identification method as set forth in claim 5, wherein the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process.
[Claim 8] The multiple RFID code identification method as set forth in any one of claim 5 to 7, wherein i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence.
[Claim 9] A module for executing a multiple RFID code identification program for performing a multiple RFID code identification method capable of identifying n types of RFID code, the method comprising the steps of: reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α; determining whether any one element E(C(Y0)) of the power set C(Yα) of Yα is included in C(X1) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; and performing a predetermined process corresponding to RFID code i if the element E(C(Y0)) of the power set C(YJ of Yα is included in the predefined C(X1) to identify the RFID code α. [Claim 10]
The module as set forth in claim 9, further comprising the step of executing an exception process if the element E(C(Yn)) corresponding to the predefined C(X1) does not exist. [Claim 11]
The module as set forth in claim 9, wherein the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process. [Claim 12]
The module as set forth in any one of claim 9 to 11, wherein i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence . [Claim 13]
A module for executing a multiple RFID code identification program for performing a multiple RFID code identification method capable of identifying n types of RFID code, the method comprising the steps of: reading RFID code α through a reader; inputting a subset X'α of intrinsic attributes obtained from the read RFID code α into a universal set Yα of intrinsic attributes of the RFID code α; determining whether any one element E(C(Y0)) of the power set C(Y0) of Yα is included in C(Xi) that is predefined to be uniquely identified, so as to uniquely identify the RFID code α; performing a predetermined process corresponding to
RFID code i if the element E(C(Y0)) of the power set C(Yn) of Yα is included in the predefined C(Xi) so as to identify the RFID code α; and returning to the step of determining whether any one element E(C(Y0)) of the power set C(Yα) of Yα is included in the predefined C(Xi) after adding 1 to i if the element
E(C(Yα)) is not included in the predefined C(Xi). [Claim 14]
The module as set forth in claim 13, further comprising the step of executing an exception process if the element E(C(Y0)) corresponding to the predefined C(Xi) does not exist. [Claim 15]
The module as set forth in claim 14, wherein the step of executing the predetermined process corresponding to the RFID code i is performed in such a way as to first identify EPC, ISO/IEC or ucode having a high frequency of occurrence and execute a corresponding predetermined process. [Claim 16]
The module as set forth in any one of claim 13 to 15, wherein i represents RFID code types in ascending order of 1 to n with respect to a high frequency of occurrence .
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