(19) United States
`(12) Patent Application Publication (10) Pub. No.: US 2005/0116050 A1
`(43) Pub. Date:
`Jun. 2, 2005
`Jei et al.
`
`US 2005O116050A1
`
`(54) MOBILE TERMINAL HAVING SMART CARD
`COUPLED WITH RFID TAG AND METHOD
`FOR PERFORMING RFID FUNCTION IN
`SUCH MOBILE TERMINAL
`(75) Inventors: Dae-Gunn Jei, Seongnam-si (KR);
`Yong-Han Lee, Suwon-si (KR)
`Correspondence Address:
`DILWORTH & BARRESE, LLP
`333 EARLE OVINGTON BLVD.
`UNIONDALE, NY 11553 (US)
`(73) Assignee: SAMSUNG ELECTRONICS CO.,
`LTD., GYEONGGI-DO (KR)
`Appl. No.:
`10/970,102
`
`Filed:
`
`Oct. 21, 2004
`Foreign Application Priority Data
`
`(21)
`(22)
`(30)
`
`Nov. 27, 2003 (KR)....................................... 85300/2003
`Publication Classification
`
`(51) Int. Cl. .................................................... G06K 19/06
`
`VCC. Cl
`RST C2
`
`
`
`
`
`
`
`
`
`
`
`RFID
`MODULATION
`SECTION
`
`RFID
`CODEC
`SECTION
`
`CLOCK
`MODULATION
`SECTION
`
`COIL
`CONNECNG
`SECTION
`
`
`
`INTERRUPT
`SECTION
`
`RFU
`
`(52) U.S. Cl. .............................................................. 235/492
`
`(57)
`
`ABSTRACT
`
`Disclosed is a mobile terminal equipped with a Smart card
`coupled with an RFID tag and a method for performing an
`RFID function in the mobile terminal. The Smart card
`includes a user information processing Section for Storing
`user information and generating a user information signal
`including user information, an RFID information processing
`Section for Storing RFID data and generating an RFID Signal
`including the RFID data, and a main calculating Section
`connected to the user information processing Section in
`order to control a generation and a transmission of the user
`information signal and connected to the RFID information
`processing Section order to command a generation and a
`transmission of the RFID signal. When the RFID tag detects
`an approach of an RFID interrogator, the RFID tag requests
`a CPU of the Smart card to perform the RFID function. Thus,
`the CPU of the Smart card transmits a mode transition signal
`to a processor of the mobile terminal in order to indicate a
`mode transition into an RFID mode. Then, the RFID func
`tion is carried out.
`
`ROM
`RFIDDATA -
`
`-
`
`
`
`EEPROM
`RFIDDATA
`
`- - - - - - -
`
`Page 1 of 13
`
`GOOGLE EXHIBIT 1012
`
`

`

`Patent Application Publication Jun. 2, 2005 Sheet 1 of 6
`
`US 2005/0116050 A1
`
`203
`MODULATION
`CONTROL SECTION
`
`ANTENNA COIL
`CONNECTION
`
`CLOCK
`GENG
`MODULATION-SCON-Vcc
`CIRCUIT RESENG SS
`SE
`
`
`
`209.
`
`202
`
`
`
`
`
`
`
`206
`
`ROW
`DECODER
`
`MEMORY
`2O7
`COUNTER 55.
`
`
`
`C1
`WCC
`RST C2
`C3
`CLK
`
`
`
`RFU C4
`
`RFU
`
`C5
`GND
`C6- Vpp
`I/O
`
`(PRIOR ART)
`
`304
`
`
`
`306
`
`EEPROM
`
`300
`
`308
`
`CONTROL
`LOGIC
`
`310
`INTERRUPT
`SECTION
`
`
`
`32
`INPUT/OUTPU
`PORT
`
`FIG.2
`(PRIOR ART)
`
`Page 2 of 13
`
`

`

`Patent Application Publication Jun. 2, 2005 Sheet 2 of 6
`
`US 2005/0116050 A1
`
`VCC
`
`RST
`
`CLK
`
`
`
`RFU
`
`RFU
`
`WCC
`
`RST
`CLK
`
`
`
`RFU
`
`C6 - GND
`ROM
`RFID DATA: C6 vpp
`
`CODEC
`SECTION
`
`RFID
`MODULATION
`SECTION
`
`EEPROM
`RFID DATA
`
`- - - - - - - -
`
`INTERRUPT
`SECTION
`
`FIG.3
`
`RFID
`MODULATION
`SECTION
`
`RFID
`CODEC
`SECTION
`
`CLOCK
`MODULATION
`SECTIO
`
`COIL
`CONNECTING
`SECTION
`
`
`
`INTERRUPT
`SECTION
`
`
`
`EEPROM
`RFID DATA
`
`- - - - - - - - - -
`
`FIG.4
`
`Page 3 of 13
`
`

`

`Patent Application Publication Jun. 2, 2005 Sheet 3 of 6
`
`US 2005/0116050 A1
`
`
`
`
`
`DFTELECOM
`
`Docs 800
`
`FIG.5
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`
`Identifier :'6F4F
`File Size : 4 bytes
`
`Structure : Transparent
`Update Activity : LOW
`
`ACCeSS COnditions :
`READ
`CHV1
`UPDATE
`ADM
`NVALIDATE
`ADM
`REHABILITATE CHV
`
`BYTES
`
`DESCRIPTION
`
`M/O
`
`RFID data
`
`FIG.6
`
`Page 4 of 13
`
`

`

`Patent Application Publication Jun. 2, 2005 Sheet 4 of 6
`
`US 2005/0116050 A1
`
`Warm reset
`
`
`
`TeleCom Mode
`(EX. GSM)
`
`720
`
`
`
`AnSWer to reSet
`
`
`
`
`
`
`
`ATR . Specific mode
`
`ATR . Specific mode
`
`
`
`Warm reset
`
`FIG.7
`
`RFID MOce
`
`730
`
`
`
`740
`
`Negotiable
`Mode
`
`
`
`RFID
`INTERROGATOR
`
`APPROACH (810)
`
`
`
`
`
`
`
`ATR (820)
`
`GRANT/REJECTION (830)
`
`FIG.8
`
`Page 5 of 13
`
`

`

`Patent Application Publication
`
`Jun. 2, 2005 Sheet 5 of 6
`
`US 2005/0116050 A1
`
`
`
`Page 6 of 13
`
`

`

`Patent Application Publication Jun. 2, 2005 Sheet 6 of 6
`
`US 2005/0116050 A1
`
`
`
`PROCESSOR
`
`SIM SECTION
`
`912
`
`94
`
`RFID
`SECTION
`
`FIG.1. O
`
`Page 7 of 13
`
`

`

`US 2005/0116050 A1
`
`Jun. 2, 2005
`
`MOBILE TERMINAL HAVING SMART CARD
`COUPLED WITH RFID TAG AND METHOD FOR
`PERFORMING RFID FUNCTION IN SUCH
`MOBILE TERMINAL
`
`PRIORITY
`0001. This application claims priority to an application
`entitled “Mobile Terminal Having Smart Card Coupled With
`RFID Tag and Method For Performing RFID Function in
`Such Mobile Terminal filed in the Korean Industrial Prop
`erty Office on Nov. 27, 2003 and assigned Serial No.
`2003-85300, the contents of which are hereby incorporated
`by reference.
`
`BACKGROUND OF THE INVENTION
`0002) 1. Field of the Invention
`0003. The present invention relates to a mobile terminal
`having an RFID (radio frequency identification) tag, the
`usage and importance of which have increased, and a
`detachable SIM (subscriber identification module), the
`usage and importance of which have also increased, and
`more particularly to a circuit in which an RFID tag is
`integrally coupled with an SIM, a mobile terminal circuit
`having the circuit and a method for performing an RFID
`function in a mobile communication terminal.
`0004 2. Description of the Related Art
`0005. An RFID transponder or a tag has been developed
`in an agriculture department of U.S. National Laboratory to
`identify livestock. The tag having an electric code capable of
`identifying an animal is inserted into or attached to the
`animal. In addition, an interrogator capable of interpreting
`Such electrical code is installed in an animal Stable, thereby
`conveniently checking whether the animal has returned to
`the stable. The interrogator transmits an RF signal to the tag,
`and the electric code Stored in the tag is returned to the
`interrogator through a modulator of the tag. This is called a
`backScatter modulation. An RFID tag has an antenna coil
`through which a modulation Signal is transmitted to the
`interrogator. Such systems are described in U.S. Pat. Nos.
`4,075,632 and 4,360,810, the contents of which are incor
`porated by reference herein.
`0006 AS RFID techniques make great strides, other
`techniques for identifying moving objects have been applied
`to various fields. For example, the techniques have been
`utilized for Vehicles, ocean conveyance containers, or rail
`road vehicles. Information Stored in a tag of Such a trans
`portation device is used for a location tracking, a content
`identification, and So forth. Techniques in relation to Such
`fields are disclosed in U.S. Pat. Nos. 4,739,328, 4,782,345,
`4,786,907, 4,816,839, 4835,377, and 4.853,705, the con
`tents of which are incorporated by reference herein.
`0007 Recently, the RFID technique has been tested in
`many kinds of fields. A communication System used in Such
`fields has come into the Spotlight, owing to wide applica
`bility. For instance, Since a mobile communication System
`has many Subscribers, in a case where the mobile commu
`nication System employing new techniqueS Such as RFID is
`industrialized, it is possible to easily make profits. Also,
`Since a current mobile communication is Stabilized in the
`aspect of profitability, Vendors request to develop applica
`tions capable of making Supplementary value.
`
`0008 FIG. 1 shows a structure of a passive RFID tag. A
`tag shown in FIG. 1 is MCRF200 available from Microchip
`Technology, Inc.
`0009. A modulation circuit 209 is a part for connecting
`antenna coils (not shown) to RFID circuit elements. As an
`RFID interrogator (not shown) approaches an RFID tag,
`according to Faraday's law, the antenna coil generates
`induced electromotive force through an inductive coupling
`between the RFID interrogator and the RFID tag. Voltage
`intensity of the antenna coil varies depending on a modu
`lated signal outputted from the modulation circuit 209.
`0010) A rectifying section 202 rectifies AC voltage of the
`induced electromotive force in order to Supply DC voltage
`to other components. A clock generating Section 201 gen
`erates a System clock by extracting carrier frequency from a
`signal transferred from the RFID interrogator. The clock
`generating Section 201 Supplies other circuit components of
`the RFID tag with a baud rate, a modulation rate, and a
`programming rate. A row decoder 204 and a column decoder
`207 extract ID data stored in a memory 206 at a clock rate
`and encode an extracted ID data by means of an NRZ (Non
`Return to Zero) Direct method, a Differential Biphase
`method, or a Manchester Biphase method before modula
`tion, thereby generating a Serial data Stream.
`0011. A modulation control section 203 modulates the
`serial data stream transferred from the decoders 204 and 207
`by using a predetermined method, Such as an FSK (Fre
`quency Sift keying) method or a PSK (Phase Shift Keying)
`and the like, and transferS the Serial data Stream to the
`modulation circuit 209. A counter 205 counts clocks out
`putted from the clock generating Section 201, So as to
`provide the clocks to the row decoder 204 and the column
`decoder 207.
`0012. In a case in which a mobile communication system
`employs an RFID technique, it is expected to provide
`various Supplementary Services Suitable for cellular Systems.
`In this case, it is absolutely necessary that current RFID
`equipment are properly combined with current cellular Sys
`tems. It has already mentioned that an RFID tag (e.g., a
`card-type RFID tag) is combined with an existing mobile
`terminal. An example of the RFID tag is disclosed in Korean
`Patent laid-open publication No. 2002-0090929 entitled
`“mobile communication terminal apparatus”.
`0013 However, since a generally-used RFID tag is only
`provided for an existing mobile terminal circuit without
`modifying it or performing an adaptation process, the prob
`lem occurs that such an RFID tag is not adaptable for the
`miniaturization and portability of the existing mobile termi
`nal which are essential features of a mobile terminal.
`0014. Meanwhile, a mobile telephone having a GSM
`(Global System for Mobile telecommunication) mode gen
`erally uses a SIM card for identifying subscribers. The SIM
`card has a Small-sized card shape and is used while being Set
`in a slot provided on a rear side of a body of a GSM mode
`mobile telephone.
`0.015 FIG. 2 shows a structure of a conventional SIM
`card for a mobile terminal.
`0016 A SIM card used for mobile communication sys
`tems, such as GSM systems, is defined in GSM 11.11
`Standard, GSM 11.12 Standard, and ISO/IEC 7816. In these
`
`Page 8 of 13
`
`

`

`US 2005/0116050 A1
`
`Jun. 2, 2005
`
`Standard documents, physical characteristics and electrical
`Signals and transmission protocols of the SIM card and a
`logical model for the SIM card are explained. The SIM card
`has 8 external pins. Contact pins C1, C2, C3, C5, and C6
`refer to Voltage Vcc, a reset RST, a clock CLK, a ground
`GND, and program Voltage Vpp, respectively. A contact pin
`C7 is an external pin for data input/output I/O and is
`connected to an antenna for identifying radio frequency.
`Also, contact pins C4 and C8 RFUs are reserved.
`0017. The SIM card internally has a Read Only Memory
`(ROM) 304 including an operation system operating the
`SIM card, a Central Processing Unit (CPU) 300 controlling
`an SIM card operation, a Random Access Memory (RAM)
`302 which is a data processing block, and an Electrically
`Erasable Programmable Read Only Memory (EEPROM)
`306 storing identity information of the SIM card.
`0018. The SIM card is a kind of a smart card. If an RFID
`tag having functions of the Smart card is separately provided
`for a mobile communication terminal capable of detaching
`the SIM card, wasteful factors occur. If the SIM card and the
`RFID tag are separately provided for the mobile communi
`cation, it is difficult to manage the RFID tag for service
`vendors, who provide various services using the SIM card
`and pursue added value creation through the various Ser
`vices. Accordingly, it is impossible for the Service vendors
`to acquire the expected advantages resulting from employ
`ing the RFID tag, which are namely an increase of profit by
`means of an RFID Service, an increase of the number of
`Subscribers, and an expansion of a Service range.
`0019. There exists a method in which the SIM card
`provides additional functions besides a primary function for
`authenticating mobile terminal users. For instance, a SIM/
`WIM card which achieves a WIM (Wireless Application
`Protocol Identify Module) function for providing applica
`tion services is formulated as WAP Provisioning Smart Card
`WAP-186-PROVSC-20010710-a Version by the WAP
`forum. Toolkit applications providing additional Services by
`dynamically using the SIM card are defined in the GSM
`11.14 Standard.
`0020. The above-mentioned forum or standards only
`defines file Structures and protocols for providing applica
`tion Services, and do not define hardware or Software pro
`tocols accompanied with combination or connection
`between the RFID tag and the SIM card. Also, the above
`mentioned forum or Standards do not Solve all existing
`problems.
`
`SUMMARY OF THE INVENTION
`0021 Accordingly, the present invention has been made
`to Solve the above-mentioned problems occurring in the
`prior art, and an object of the present invention is to provide
`a smart card coupled with an RFID tag.
`0022. Another object of the present invention is to pro
`vide a mobile terminal capable of mounting a Smart card
`coupled with an RFID tag thereon and a method for per
`forming an identification function in a mobile terminal.
`0023. In order to accomplish the above objects, according
`to a first aspect of the present invention, there is provided a
`Smart card comprising: a user information processing Sec
`tion for Storing user information and generating a user
`information Signal including user information; an RFID
`
`information processing Section for Storing RFID data and
`generating an RFID Signal including the RFID data; and a
`main calculating Section connected to the user information
`processing Section, in order to control generation and trans
`mission of the user information Signal, and connected to the
`RFID information processing Section in order to command
`generation and transmission of the RFID Signal.
`0024.
`In order to accomplish the above objects, according
`to a Second aspect of the present invention, there is provided
`a mobile terminal comprising: a Smart card installed in the
`mobile terminal for Storing user information, the Smart card
`including an RFID tag, and a processor in communication
`with the Smart card so as to grant or reject an RFID function
`of the Smart card.
`0025. In order to accomplish the above objects, according
`to a third aspect of the present invention, there is provided
`a method for performing an RFID function in a mobile
`terminal equipped with a Smart card having an RFID tag, the
`method comprising: detecting an approach of an RFID
`interrogator by using the RFID tag; requesting a CPU of the
`Smart card to perform the RFID function by utilizing the
`RFID tag detecting the approach of the RFID interrogator;
`transmitting a mode transition Signal to a processor of the
`mobile terminal by using the CPU of the Smart card to
`indicate a mode transition into an RFID mode; and perform
`ing the RFID function by using the Smart card after trans
`mitting the mode transition signal.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`0026. The above objects and other features and advan
`tages of the present invention will be more apparent from the
`following detailed description taken in conjunction with the
`accompanying drawings, in which:
`0027 FIG. 1 is a block diagram of a conventional radio
`frequency identification (RFID) tag;
`FIG. 2 is a block diagram of a conventional SIM
`0028)
`card;
`0029 FIG. 3 is a block diagram of an SIM card coupled
`with an RFID tag according to a first embodiment of the
`present invention;
`0030 FIG. 4 is a block diagram of an SIM card coupled
`with an RFID tag according to a second embodiment of the
`present invention;
`0031
`FIG. 5 is a block view showing a logical structure
`of an SIM card according to one embodiment of the present
`invention;
`0032 FIG. 6 is a view showing an EF structure for
`storing RFID data according to one embodiment of the
`present invention;
`0033 FIG. 7 is a view showing a mode transition of an
`SIM card according to one embodiment of the present
`invention;
`0034 FIG. 8 is a view showing a signal exchange
`between a mobile terminal and a SIM card according to one
`embodiment of the present invention;
`0035 FIG. 9 is a block view showing a structure of an
`ATR signal shown in FIG. 8; and
`
`Page 9 of 13
`
`

`

`US 2005/0116050 A1
`
`Jun. 2, 2005
`
`FIG. 10 is a schematic view showing a structure of
`0.036
`a mobile terminal equipped with a SIM card having an RFID
`Section.
`
`DETAILED DESCRIPTION OF THE
`PREFERRED EMBODIMENTS
`0037 Hereinafter, preferred embodiments of the present
`invention will be described with reference to the accompa
`nying drawings. Although certain functions, Such as ele
`ments of a Specific circuit, are specifically defined in the
`following description of the present invention, it will be
`obvious to those skilled in the art that Such definitions of
`functions are merely to improve understanding of the
`present invention and that the present invention can be
`carried out without Such specific elements. Also, in the
`following description of the present invention, the same
`reference numerals are used to designate the Same or similar
`components and a detailed description of known functions
`and configurations incorporated herein are omitted to avoid
`making the Subject matter of the present invention unclear.
`0038 A SIM card coupled with an RFID tag is an
`improvement of a conventional SIM card in view of hard
`ware configuration, logical Structure, and operational pro
`cedure.
`0039) 1) Hardware Configuration
`0040 FIGS. 3 and 4 are block diagrams of a SIM card
`coupled with an RFID tag according to exemplary embodi
`ments of the present invention.
`0041 FIG. 3 is a view showing the structure of the SIM
`card coupled with the RFID tag according to a first embodi
`ment of the present invention. In FIG. 3, several already
`known components of the SIM card are not illustrated. In
`addition, RFID data shown as a dotted-block in FIG. 3
`represent that an RFID memory section can be provided in
`an EEPROM 404 or in an ROM 410.
`0042. In a conventional RFID tag, ID (identification) data
`are generally stored in an EEPROM. However, the SIM card
`also includes the EEPROM. Thus, a margin space of the
`EEPROM can be utilized as a storage space of RFID data.
`That is, the EEPROM 404 stores RFID data as well as
`intrinsic data of the SIM card.
`0043. An RFID CODEC section 406 and an RFID modu
`lation section 408 are provided in the ROM 410 of the SIM
`card. The ROM 410 of the SIM card is a digital logic circuit
`for realizing an operating System by using a digital CODEC
`and a modulation Section.
`0044) ACPU 402 transfers an order to the ROM 410 such
`that a required function can be carried out. At this time, Since
`RFID data is stored based on a logical structure of a
`conventional SIM card, RFID data can be processed as
`another SIM card data. In other words, functional instruction
`words, such as SELECTION, STATUS, READ BINARY,
`and UPDATE BINARY, described in “8. Description of the
`functions' of GSM 11.11 standard document can be used in
`Software capable of operating RFID functions of the SIM
`card.
`0.045 Connection pins C4 and C8, usage of which is now
`reserved, are connected to an RFID antenna coil (not shown)
`through a coil connecting Section 412 connected to an
`interrupt Section 414. Induced electromotive force is gener
`
`ated from the RFID antenna coil when an RFID interrogator
`(not shown) approaches the RFID antenna coil and induced
`electromotive force is transferred to the interrupt section 414
`through the coil connecting Section 412, thereby creating the
`interrupt. Upon detecting the interrupt, the CPU 402 recog
`nizes that extracting and processing of RFID data are
`required. Thus, the CPU 402 reads RFID data stored in a
`memory section (EEPROM 404 or ROM 410) and stores
`RFID data in a RAM 400. In addition, the CPU 402 controls
`the RFID CODEC Section 406 and the RFID modulation
`section 408 so as to process RFID data. An RFID signal
`outputted from the RFID modulation section 408 is trans
`mitted to the RFID interrogator through the coil connecting
`Section 412 with a predetermined frequency determined by
`the RFID system.
`0046) In addition, the CPU 402 not only detects the
`creation of interrupt from the interrupt section 414, but also
`recognizes a time for carrying out the RFID functions
`through various manners, Such as a Software timer.
`0047. When seeing the first embodiment of the present
`invention in view of usable power, RFID functional blocks,
`Such as the EEPROM 404, RFID CODEC section 406, and
`RFID modulation section 408 receive Supply voltage Vcc,
`which is stable Voltage of a mobile terminal, through a
`connection terminal C1 of the SIM card. Thus, a problem
`caused by a conventional power Supply of induced electro
`motive force, which is unstable depending on peripheral
`environment, can be Solved.
`0048 When seeing the first embodiment of the present
`invention in View of a clock CLK, the clock Supplied to a
`connection pin C3 is typically in a Standard range of 1 MHz
`to 5 MHz from a clock supply of the mobile terminal. When
`the RFID Signal is transferred to the coil connecting Section
`412, the CPU 402 varies the clock CLK according to the
`RFID system and transmits the RFID signal by synchroniz
`ing the RFID signal with the varied clock CLK.
`0049 FIG. 4 is a view showing a structure of the SIM
`card coupled with the RFID tag according to a Second
`embodiment of the present invention. In FIG. 4, several
`already-known components of the SIM card are not illus
`trated.
`0050 Referring to FIG.4, an RFID CODEC section 508
`and an RFID modulation section 510 are provided in the
`SIM card in Such a manner that the RFID CODEC Section
`508 and the RFID modulation section 510 are separate from
`a memory Section.
`0051 A clock modulation section 516 modulates a clock
`CLK transmitted from a mobile terminal through a connec
`tion pin C3 of the SIM card, thereby generating an RFID
`clock signal 518 and a SIM clock signal 520. The RFID
`clock signal 518 has a frequency required for operating
`RFID functional blocks, such as the RFID CODEC section
`508 and the RFID modulation Section 510. The SIM clock
`Signal has a frequency required for operating SIM functional
`blocks, such as a CPU 500, a RAM 502, a ROM 504, and
`an EEPROM 506.
`0.052 Selectively, the RFID clock signal 518 can be used
`as a reference when the CPU 500 finally generates the RFID
`signal, without using the RFID clock signal 518 for the
`operation of the above RFID functional blocks. In this case,
`the above RFID functional blocks may use the clock signal
`
`Page 10 of 13
`
`

`

`US 2005/0116050 A1
`
`Jun. 2, 2005
`
`identical to the clock signal of the SIM functional blocks.
`That is, the above RFID functional blocks may use the SIM
`clock signal 520. The clock is generated by means of the
`clock modulation section 516 and is controlled by means of
`a control signal 522 applied from the CPU 500.
`0053) The CPU 500 reads RFID data stored in the
`memory section, such as the EEPROM 506 or the ROM 504,
`and stores RFID data in the RAM 502. In addition, the CPU
`500 transferS RFID data to the RFID CODEC Section 508 SO
`as to convert RFID data into the RFID signal through the
`RFID modulation section 510. The RFID signal is trans
`ferred to a coil connecting Section 514 and is propagated to
`an exterior through an antenna coil (not shown) connected to
`the coil connecting Section 514.
`0054), 2) Logical Structure
`0055) A logical structure of the SIM card used in a GSM
`mobile terminal is prescribed in a GSM 11.11 standard
`document. In order to provide the RFID functions according
`to the present invention, it is required to vary the logical
`structure of the SIM card. However, the variation may be
`carried out within a predetermined range capable of main
`taining flexibility.
`0056 FIG. 5 is a block view showing the logical struc
`ture of the SIM card according to one embodiment of the
`present invention.
`0057 The logical structure of the SIM card includes a
`master file (MF), a dedicated file (DF), and an elementary
`file (EF). The MF is selected when the SIM card is initially
`operated and is designated as a present directory. The DF is
`used for providing multi-functions required for various
`busineSS Services, Such a telecom Service, a Global System
`for Mobile communications (GSM), a Digital Cellular Sys
`tem 1800 (DCS1800) or an Interim Standard 41 (IS41). The
`DF has the EF, which stores data utilized for each service.
`0.058. In order to realize the present invention, a new DF
`and a new EF corresponding to the new DF are added to the
`conventional SIM logical system. As shown in FIG. 5, the
`new DF includes a DF
`for the RFID function. An EF
`stores RFID data for the purpose of the service.
`0059. In the SIM logical system, a file ID “7F2X” is
`allotted to the DF for new services. Thus, by storing RFID
`data in the EF corresponding to the DF having the file ID of
`7F2X, it is possible to store data for the RFID service in the
`conventional SIM logical Structure without using conven
`tional instruction words. Such files for the RFID service are
`Stored in the EEPROM 406 shown in FIG. 3 and the
`EEPROM 506 Shown in FIG. 4.
`0060 FIG. 6 is a view showing an EF structure for
`Storing RFID data according to an exemplary embodiment
`of the present invention.
`0061 Since the EF is based on GSM standardization, the
`EF is realized as an extensible file of the SIM logical
`Structure So that conventional Software can be continuously
`used.
`0062) A variable range of an “identifier” may depend on
`the file ID of the DF. For instance, if the DF
`has a file
`ID of 7F2X, the identifier has 6F2X, 6F3X or 6F4X. A
`“structure” is a file structure of the EF. Transparent type,
`
`linear fixed type, and cyclic type EFS are Standardized. The
`transparent type EF is adaptable for a Sequence of bytes,
`Such as RF data.
`0063) A “file size” is a size of RFID data to be stored (for
`example, 4 bytes). Software instruction words for control
`ling RFID data stored in the EF include READ, UPDATE,
`INVALIDATE, and REHABILITATE, which are based on
`the standardization of the GSM. In addition, executive
`conditions for the instruction words include CHV1 (card
`holder verification 1) and ADM (administration). The CHV1
`represents a Software task allowing a card holder to acceSS
`thereto, and the ADM represents a Software task allowing an
`administrator of the SIM card to access thereto.
`0.064
`3) Operation Procedure
`0065. By providing the RFID function to the conven
`tional SIM card, a mode of the SIM card and an interface
`between a mobile terminal and the SIM card are varied.
`0066 FIG. 7 is a view showing a mode transition of the
`SIM card according to one embodiment of the present
`invention.
`0067. A mode of the SIM card can be shifted into a
`Specific mode or a negotiable mode after transmitting an
`ATR (answer-to-reset) signal in response to a reset request
`from the mobile terminal. The specific mode is divided into
`a telecom mode (for example, GSM mode) and an RFID
`mode. Application Software of the mobile terminal requests
`the negotiable mode through a signal exchange between the
`mobile terminal and the SIM card. A mode transition of a
`Smart card into the RFID mode according to a request of the
`mobile terminal is one example of the negotiable mode.
`0068 The mode transition is displayed by a specific
`mode byte TA(2) of the ATR signal, which is prescribed in
`ISO/IEC 7816-3. The ATR signal is the sequence of bytes
`transferred to the mobile terminal from the SIM card as an
`answer for a reset request of the mobile terminal. The ATR
`Signal is an asynchronous transmission.
`0069 FIG. 8 is a view showing the signal exchange
`between the mobile terminal and the SIM card according to
`one embodiment of the present invention.
`0070). When the CPU of the SIM card having the RFID
`function recognizes an approach of the RFID interrogator,
`via the interrupt section, the CPU of the SIM card indicates
`the approach of the RFID interrogator to the CPU of the
`mobile terminal by using the ATR signal. Upon receiving the
`ATR signal indicating an operation of the RFID function
`from the SIM card, the mobile terminal grants the RFID
`function depending on an application program or an opera
`tional state of the mobile terminal, so that the SIM card can
`perform the RFID function. In addition, if it is required that
`mobile terminal request a primary function of the SIM card,
`that is, when it is required to primarily request a user's
`identification for a communication System or when the
`mobile terminal cannot perform the RFID function, the
`mobile terminal may reject the RFID function. In addition,
`without considering the priority, the mobile terminal can be
`designed Such that the mobile terminal is converted into an
`RFID mode when the CPU of the mobile terminal recog
`nizes the approach of the RFID interrogator.
`0071 FIG. 9 is a block view showing a structure of the
`ATR signal shown in FIG. 8.
`
`Page 11 of 13
`
`

`

`US 2005/0116050 A1
`
`Jun. 2, 2005
`
`0072 The ATR signal, which is prescribed in ISO/IEC
`7816-3, is a combination of bytes transmitted in series.
`Usage of each byte is prescribed in ISO/IEC 7816-3. In
`addition, usage of some bytes is reserved. Thus, the SIM
`card can indicate the start of the RFID function to the mobile
`terminal by using the ATR signal. For instance, the ATR
`Signal including beats (for example, beats having a lower
`four-beat value of “1111”) capable of indicating the RFID
`mode can be made in the specific mode byte TA(2). The
`Specific mode byte TA(2) may be used to indicate that a
`mode has been already shifted into the RFID mode from the
`specific mode after a cold reset (that is, when the SIM card
`having the RFID mode receives a request, which does not
`relate to the RFID, from the mobile terminal. For example,
`when the mobile terminal requests the user's ID). In addi
`tion, the specific mode byte TA(2) may be used to indicate
`the start of the RFID mode as the RFID interrogator
`approaches the SIM card (that is, notifying of a transition
`into the RFID mode from a communication mode).
`0073. According to another embodiment of the present
`invention, a bit indicating the RFID mode can be added to
`the lower four-bits of a TD(i), which is an interface byte.
`According to the standardization of ISO/IEC 7816-3, lower
`four-bits of the TD(i) and TA(2) are defined as a parameter
`T, wherein usage of Some parameters (T=5 to 13) is reserved
`to use them in the future. Therefore, usage of Some T values
`for the purpose of the RFID does not violate the standard
`ization of ISO/IEC 7816-3, so that the SIM card can be
`flexibly used in a conventional system.
`0.074
`FIG. 10 is a schematic view showing a structure of
`a mobile terminal equipped with an SIM card having an
`RFID Section.
`0075) Reference numeral 900 represents a processor of
`the mobile terminal ME. An example of the processor is a
`mobile station modem (MSM) chip called “mobile proces
`Sor' available from the Qualcomm company.
`0076 Reference numeral 950 represents the SIM card.
`The SIM card having the RFID section is installed in the
`mobile terminal in order to Signal a mode transition into an
`RFID mode. To this end, a CPU912, a SIM section 914 and
`an RFID section 916 of the SIM card 950 are only illustrated
`in FIG. 10. Already-known components of the SIM card 950
`are not illustrated in FIG. 10.
`0077. The SIM section 914 is a user information pro
`cessing Section for Storing user information and generating
`a user information signal including user information. In
`addition, the user information processing Section includes a
`user information memory Section for Storing user informa
`tion and a user program memory Section having a program
`generating a user information Signal. The user information
`memory section includes the EEPROM 404 and the user
`program memory section includes the ROM 410, as shown
`in FIG. 3. I