KR100706946B1 - Dual interface radio frequency chip and dual interface method thereby - Google Patents

Abstract

The present invention relates to an RF chip for 13.56 MHz RFID (Radio Frequency IDentification) mounted on a personal portable terminal, and in particular, the RF chip according to the present invention is a smart card and a host of a personal portable terminal. Dual interface function to interface CPU, smart card and external RF reader, and input user's password (PIN) in the host CPU and compare with password of smart card After performing the user authentication, and changes the communication mode to provide a dual interface RF chip and a dual interface method using the RF reader and the smart card to communicate.

Personal handheld terminal, smart card, dual interface, RF chip, RF reader

Description

DUAL INTERFACE RADIO FREQUENCY CHIP AND DUAL INTERFACE METHOD THEREBY}

1 is a conceptual diagram of a combination card applied to a personal portable terminal according to the prior art,

2 is a block diagram of a personal portable terminal to which a dual interface RF chip according to the present invention is applied;

3 is a detailed configuration diagram of an RF chip and a smart card for explaining the operation of the RF chip of FIG.

4 is a signal processing diagram for explaining a dual interface process using the RF chip of FIG.

<Description of Symbols for Main Parts of Drawings>

100: personal portable terminal 110: host CPU

120: dual interface RF chip 121: host CPU interface

123: mode conversion unit 125: smart card interface unit

127: RF antenna interface unit 130: smart card

131: credit card unit 131a: password storage and comparison unit

131b: card number storage unit 133: mobile banking unit

133a: password storage and comparison unit 133b: account number storage unit

140: key input unit 150: display unit

160: memory unit 200: RF reader

P1: Password input and transmission path P2: Password comparison result transmission path

P3: Mode change command transmission path P4: Interface connection signal transmission path

P5: Communication Card for Smart Card and RF Reading Period

The present invention relates to an RF chip for 13.56 MHz RFID (Radio Frequency IDentification) mounted on a personal portable terminal, and in particular, the RF chip according to the present invention is a smart card and a host of a personal portable terminal. Dual interface function to interface CPU, smart card and external RF reader, and input user's password (PIN) in the host CPU and compare with password of smart card After performing the user authentication, and changes the communication mode to provide a dual interface RF chip and a dual interface method using the RF reader and the smart card to communicate.

In general, a smart card is a microprocessor with its own arithmetic function on the surface of a plastic card of the same material and size as a credit card, an integrated circuit including a chip operation system (COS), a memory, and an encryption algorithm. IC) An electronic card with a chip attached.

A smart card is a kind of chip card. Unlike a memory card such as a phone card or a loyalty card that functions as a simple data storage and value (royalty) counter, a smart card is a small computer with a microprocessor and memory. , Credit card, medical card, SIM card, etc.

Such smart cards can be broadly classified into Naitive Cards and Open Platform Cards, which include Contact Cards, Contactless Cards, Hybrid Cards, and Combi Cards. Combination cards include Java cards used in the Java Card Forum and Visa Card, and MULTOS cards used in Master Card and Mundex.

The dual closed cards are classified into contact and contactless types according to the communication method. A contact smart card is a card operated by physical contact between the smart card reader and the chip of the smart card. It is used for financial transaction authentication, electronic signature, etc. that processes a lot of data, and the contactless smart card is an antenna embedded in the card by means of a radio frequency signal of 13.56MHz, and communicates with the smart card reader. Since it does not require contact, it can be used for transportation cards that are limited in processing time.

In addition, a closed card can be divided into a hybrid card and a combi card according to an interface method. In a hybrid card, a contact card and a contactless card are physically present in a single card, each of which is an independent memory. There is a separate operating system.

On the other hand, the Combi card is a card in which a contact card and a contactless card share a memory space and are combined, and share a contact and a contactless interface on a single chip card so that a contact or contactless interface can be supported by the same chip. It is a multi-functional card that combines the advantages of contact cards, which are mainly used for credit cards, electronic wallets, GSM SIMs, medical cards, and contactless cards, which are mainly used for transportation cards and access control.

Smart cards can not be duplicated by keeping the data securely can replace the weak security of the conventional magnetic card, and can store the data program in the memory can be used for a variety of applications mounted on a single card.

Therefore, the use of smart cards is rapidly increasing in various applications such as finance, telecommunications, transportation, medical, and e-commerce. Especially, the combination card can meet all the requirements of each operator, so synergy effect between transportation and finance Thanks to this, related infrastructure is spreading rapidly.

On the other hand, in mobile communication, a smart card has a function as an ID card for identifying a subscriber and a function for processing billing information of an electronic fee.

1 is a conceptual diagram of a combination card applied to a personal handheld terminal according to the prior art, and shows a contact interface 25 and a contactless interface 27 together with a single microprocessor 21 and a memory 23 as shown. All are equipped.

However, in the conventional combination card 20 mounted on the personal portable terminal, one microprocessor 21 controls the contact interface 25 to communicate with the host CPU of the personal portable terminal, and separately from the contactless interface 27. Since it is provided in the form of communicating with the external RF reader 200 to control, the existing combination card 20 is in contact with the host CPU (10) while contactless communication or contactless communication is not possible, Even if contactless communication is possible, there is a problem in that an application in the same smart card cannot be selected or interacted with through the two interfaces 25 and 27.

Therefore, there is a problem in that service procedures such as credit card and mobile banking cannot be divided and processed for the same smart card application through both contact and contactless interfaces.

For example, a separate operation such as password authentication through a contact interface and reading a credit card number or a mobile bank account number from an external RF reader through a contactless interface is not possible.

Therefore, an object of the present invention for solving the above problems is a contact interface and smart card between the smart card and the host CPU of the personal portable terminal to safely use a smart card such as a combination card built in the personal portable terminal in mobile payment The present invention provides a dual interface RF chip and a dual interface method using the non-contact interface between the RF reader and an external RF reader.

In addition, another object of the present invention is to enter the user password in the host CPU of the personal portable terminal to use a smart card, such as a combination card built in the personal portable terminal in the mobile payment to communicate with the smart card to perform the user authentication The present invention provides a dual interface RF chip and a dual interface method using the same by changing a communication mode and performing financial settlement through a smart card and an external RF reader.

In addition, another object of the present invention is to enable the user password authenticated in the communication mode between the host CPU and the smart card of the personal portable terminal can be maintained even if the communication mode is changed to the communication mode between the smart card and the external RF reader An interface RF chip and a dual interface method using the same are provided.

In addition, another object of the present invention is to be maintained even when the communication mode is changed to the communication mode between the smart card and the external RF reader selected state of the application in the smart card selected in the communication mode between the host CPU and the smart card of the personal mobile terminal. To provide a dual interface RF chip and a dual interface method using the same.

In order to achieve the above object, the present invention provides an RF chip for interfacing the communication between the host CPU and the smart card and the communication between the smart card and the external RF reader of the personal portable terminal with a smart card,

A host CPU interface unit providing a data and control signal interface between the host CPU and the RF chip;

A smart card interface unit providing a data and control signal interface between the host CPU and the smart card through the host CPU interface unit;

An RF antenna interface unit providing a data and control signal interface between the smart card and the external RF reader through the smart card interface unit; And

A mode conversion unit for converting a communication mode to communicate with the RF antenna interface by controlling the smart card interface unit communicating with the host CPU interface according to a mode conversion command from the host CPU applied through the host CPU interface unit; It provides a dual interface RF chip characterized by the configuration.

In order to achieve the above object, the present invention uses a dual interface RF chip to interface the communication between the host CPU and the smart card and the communication between the smart card and the external RF reader of the personal portable terminal with a smart card embedded In the dual interface method,

Receiving a user password from the host CPU and authorizing the user password to the smart card;

Receiving the user password comparison result response from the smart card and authorizing it to the host CPU;

When receiving a communication mode conversion command from the host CPU, detecting the RF signal of the external RF reader to the smart card, and receives the data from the smart card to convert the RF signal to the external RF reader It provides a dual interface method using a dual interface RF chip, characterized in that consisting of.

At this time, in the dual interface method using the dual interface RF chip according to the present invention, in the step of receiving the user password applied from the host CPU to the smart card to receive the payment means information from the host CPU further smart It is characterized by the application to the card.

The term 'interface' according to the present invention refers to a connection between devices configured to exchange information and signals between two or more devices, and thus, the 'interface part' refers to the device itself performing such a connection.

In addition, since the RF chip and the smart card according to the present invention are digitally interfaced, the smart card does not include an analog front-end related element, but the RF chip includes an analog front-end related element. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they are displayed on different drawings. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

2 is a block diagram of a personal portable terminal to which a dual interface RF chip according to the present invention is applied. FIG. 3 is a detailed block diagram of an RF chip and a smart card for explaining the operation of the RF chip of FIG. 1 is a signal processing diagram illustrating a dual interface process using the RF chip of FIG. 1.

As shown in FIG. 2, the dual interface RF chip 120 according to the present invention includes an antenna for transmitting and receiving data and signals with an external RF reader 200 and a radio frequency signal of 13.56 MHz, and a personal portable terminal 100. It is mounted inside the) and is connected to the host CPU 110 and the smart card 130.

In addition, as shown in FIG. 3, the dual interface RF chip 120 according to the present invention includes a host CPU interface 121 for communicating with the host CPU 110 and a smart card interface for communicating with the smart card 130. The unit 125 includes an RF antenna interface unit 127 for communicating with the external RF reader 200 and a mode conversion unit 123 for converting each communication mode.

The host CPU interface 121 provides a data and control signal interface between the host CPU 110 and the RF chip 120. In particular, the host CPU interface 121 receives a user identification (PIN) from the host CPU 110 and receives the smart card 130 through the smart card interface unit 125 to be authenticated from the smart card 130. ) To the password storage and comparison unit (131a, 133a).

As shown in FIG. 3, the user password is input by the user from the key input unit 140 of FIG. 2, and the host CPU 110 adds it to the host CPU interface unit 121.

Meanwhile, as shown in FIG. 3, the key input unit 140 generates a signal corresponding to the user's payment means selection (S01) and applies the signal to the host CPU 110, and the display unit 150 displays the host CPU 110. According to the input window display command (S02), the password input window corresponding to the selected payment means may be displayed through the liquid crystal display device of the personal mobile terminal 100 (S03).

Accordingly, the user may select whether to make a payment using the credit card unit 131 of the smart card 130 or the mobile banking unit 133 through the key input unit 140.

According to the user's payment method selection, the host CPU 110 requests the user to input a password for each payment method again, and waits for a password input (S04), and if there is a password input (S10) from the key input unit 140, Applies to the host CPU interface 121 with the selected payment method information.

The host CPU interface unit 121 receives the payment means information and the user password from the host CPU 110 and applies the smart card interface unit 125 to transmit the information to the smart card 130.

The smart card interface unit 125 applies the payment means information and the user password authorized from the host CPU 110 to the smart card 130 through the host CPU interface 121.

The smart card 130 compares the password of any one of the credit card unit 131 and the mobile banking unit 133 from the received payment means information (S20) and applies the result back to the smart card interface unit 125. .

The smart card 130 compares the user password authorized by the credit card password storage and comparison unit 131a or the mobile banking password storage and comparison unit 133a with a preset password according to the payment method information.

In FIG. 2, the credit card password and the mobile banking password are different from each other, and the components for storing and comparing the same are different. However, this is only an exemplary embodiment for explaining the separate processing with the specific application in the smart card 130. In addition, the smart card 130 may be provided with one control unit to perform a corresponding function.

In addition, for convenience of explanation, the smart card 130 is divided into a credit card unit 131 and a mobile banking unit 133, and a memory space for storing card number information 131b and account number information 133b, respectively. Although shown, this is also a difference in memory addresses, and does not indicate a physically separated memory space.

As shown in FIG. 3, the password comparison result of the smart card 130 is applied to the host CPU 110 via the smart card interface 125 and the host CPU interface 121 (S30). The host CPU 110 performs user authentication when the password matches according to the comparison result (S40), and outputs a corresponding error message through the display unit 150 if the password does not match.

When it is assumed that the password entered by the user matches the credit card password or the mobile banking password of the smart card 130, the host CPU 110 that has performed user authentication is the mode conversion unit 123 through the host CPU interface 121. By transmitting the communication mode conversion command (S50) to the smart card 130 and the external RF reader 200 to permit data transmission and reception.

The mode conversion unit 123 controls the smart card interface unit 125 communicating with the host CPU interface unit 121 according to a mode conversion command from the host CPU 110 applied through the host CPU interface unit 121. The communication mode is switched to communicate with the RF antenna interface unit 127 (S60 and S61).

Accordingly, the communication is made between the smart card 130 and the external RF reader 200 (S70), the credit card number 131b or mobile banking account number 133b of the smart card 130 to the external RF reader 200 ) Information is transmitted to the external RF reader 200 via the smart card interface 125 and the RF antenna interface 127 (S80).

The RF antenna interface unit 127 detects a 13.56 MHz radio frequency signal of the external RF reader 200 and applies it to the smart card 130 through the smart card interface unit 125, and receives the smart card 130. Receives data from the external RF reader 200 converts and transmits the 13.56MHz radio frequency signal for reception.

As described above, the dual interface RF chip 120 according to the present invention transfers the communication mode of the RF chip 110 from the host CPU 110 between the host CPU 110 and the smart card 130 and the smart card ( 130) and provides a dual interface by performing a multi-mode conversion, such as communication relay between the external RF reader 200.

In addition, the dual interface RF chip according to the present invention after inputting the user password in the host CPU 110 to perform the user authentication, change the communication mode through the RF chip 120 in the external RF reader 200 through the smart card By allowing the communication with the processor 130, password authentication is performed through the interface with the host CPU, and separate operations such as reading a credit card number or a mobile banking account number through an interface with an external RF reader ( Separate Operation).

Accordingly, in the dual interface method using the dual interface RF chip according to the present invention, when the smart card embedded in the personal portable terminal is used for mobile payment / payment using RF, the password input is performed in the personal portable terminal, and the remaining transactions are embedded. The smart card and the external RF reader can be performed, thereby eliminating the inconvenience of having to authenticate the user by reading the information of the smart card from the outside without the user's permission or by installing a PIN pad on a credit card query.

The RF chip according to the present invention can be implemented by separating a part of the RF circuit in the combi card separately embedded in the board of the personal portable terminal to safely use the conventional combi card in mobile payment.

On the other hand, in the detailed description of the present invention has been described with reference to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention performs user authentication by inputting a user password in the host CPU of the personal mobile terminal, and then changes the communication mode so that the external RF reader can communicate with the smart card through the RF chip. It is effective to perform password authentication through an interface with and to separate operations such as reading a credit card number or a mobile banking account number through an interface with an external RF reader.

In addition, the present invention provides a dual interface RF chip for interworking the contact interface between the smart card and the host CPU of the personal portable terminal and the non-contact interface between the smart card and the external RF reader intercommunication embedded in the personal portable terminal Smart cards such as cards can be used safely in mobile payments.

Claims (3)

In the RF chip for interfacing the communication between the host CPU and the smart card of the personal portable terminal with a smart card and the communication between the smart card and the external RF reader, A host CPU interface unit providing a data and control signal interface between the host CPU and the RF chip; A smart card interface unit providing a data and control signal interface between the host CPU and the smart card through the host CPU interface unit; An RF antenna interface unit providing a data and control signal interface between the smart card and the external RF reader through the smart card interface unit; And A mode conversion unit for converting the communication mode to communicate with the RF antenna interface by controlling the smart card interface unit communicating with the host CPU interface according to the mode conversion command from the host CPU applied through the host CPU interface unit Wherein the host CPU controls the mode conversion unit to convert the communication mode when the user authentication is successful using the smart card.  In the dual interface method using a dual interface RF chip for interfacing the communication between the host CPU and the smart card of the personal portable terminal with a smart card and the communication between the smart card and the external RF reader, Receiving a user password from the host CPU and authorizing the user password to the smart card; Receiving the user password comparison result response from the smart card and authorizing it to the host CPU; When receiving a communication mode conversion command from the host CPU, detecting the RF signal of the external RF reader to the smart card, and receives the data from the smart card to convert the RF signal to the external RF reader Wherein, the RF chip is a dual interface method using a dual interface RF chip, characterized in that for receiving the communication mode conversion command when the user authentication is successful in the host CPU. The method of claim 2, In the step of receiving the user password authorized from the host CPU to the smart card, The dual interface method using the dual interface RF chip, characterized in that further receiving payment means information from the host CPU to the smart card.

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