KR20020016752A - Multi-access system and multi-access method for RF cards - Google Patents

Abstract

It is an object of the present invention for an RF card that can selectively authenticate their use in one card terminal for a plurality of RF cards issued by a plurality of card generators and collect payment for the use of the RF card. The present invention provides a multiple access system and a multiple access method.

In the RF card multiple access method of the present invention, the RF card serial number transmission input from the RF card side activated by the radio wave signal of the card terminal determines whether the RF card is approaching the card terminal. If the access is recognized, the kit value of SAM1 is called through the UART to attempt to access the memory area of the access RF card using the kit value, and if the memory area of the access RF card is accessed with the kit value of SAM1, the card number stored in the memory area is accessed. If the RF card memory area is not accessed with the kit value of the SAM1 kit, the billing routine for the RF card usage payment is read by reading the information or the balance information, and the SAM2, SAM3,... , Sequentially calling kit values of SAMn and sequentially attempting to access the memory area of the RF card, and sequentially selecting SAM2, SAM3,... When the memory area of the RF card is accessed by any of the kit values of SAMn, the card number information or balance information stored in the memory area is read, and the billing routine for the RF card payment is performed according to the card payment method. If the memory area of the RF card is not accessed by the kit value of the SAM, determining that the RF card cannot be used.

Description

Multi-access system and multi-access method for RF card

The present invention relates to an RF card terminal capable of accepting and processing all of a plurality of RF cards issued by a plurality of card generators, and in particular, a plurality of RF cards installed in the RF card terminal having different security kit values. The present invention relates to a multiple access system and a multiple access method for an RF card for allowing multiple accesses through a single antenna.

The RF card contains only the IC chip and the antenna coil connected to the IC chip, and does not have its own battery. Therefore, power must be supplied from the outside to drive the IC chip.

The RF card uses a radio frequency signal propagated from the RF card terminal to the internal antenna coil in a non-contact manner to rectify the induced power obtained therefrom and use it as a power source of the IC chip. The card information is exchanged wirelessly between the IC chips of the RF card.

RF card has a unique authentication system for each card issuer, which is very important for security. Authentication of the RF card is made through a SAM (Secure Access Module), and each RF card issuer approves the use of the RF card through a unique SAM.

Therefore, in order to read various types of RF cards and verify their validity, and to collect payments for using RF cards, it is necessary to install as many SAMs and antennas as the number of issuers of the RF cards.

So far, in order to allow multiple RF cards in one RF card terminal, it is necessary to generate radio waves for activating the RF card and to exchange card information wirelessly with the IC chip in the active RF card. An RF demodulation module for demodulating the antenna, RF modulated card information received by the antenna, and modulating the information on the card terminal side to RF and transmitting the RF information to the RF card side; and the card information demodulated by the RF modulation demodulation module. If they had, the burden of installing a series of RF card access systems, which consist of SAMs that access the RF card to approve card usage and collect card usage bills, was set up separately for each issuer.

In order to solve the installation problem of the RF card terminal for the RF card multi-access, the business consultation between Seoul Metropolitan City and the RF card terminal manufacturing and development company has been in progress since 1997. A technical concept has been proposed in the document that combines to make the module publicly available.

Patent application No. 10-0270615 (filed on August 1, 1998) using a known multi-access scheme of the RF card as a charging agent has been granted a patent by presenting the technical details.

The technical core of the preceding patent invention (Registration No. 10-0270615) transmits and receives radio frequency signals for accessing a common memory area or a unique memory area of a wireless information recording medium, as disclosed in the claims of the patent publication. And demodulating the radio frequency signal received through the antenna to detect read information (baseband signal) of the radio information recording medium or to modulate information to be recorded on the radio information recording medium into the radio frequency signal. Extracts the code number system and its identification number from the wireless core module (RF modulation and demodulation module) and the wireless information recording medium readout information demodulated by the wireless core module to verify the validity of the wireless information recording medium and verify the result In case of legitimate information corresponding to a plurality of wireless security hats that generate additional information accordingly A plurality of wireless security units may perform a serial or parallel interface between the wireless core module and the plurality of wireless security modules to read wireless information recording medium read information detected by the wireless core module according to a predetermined information transmission method. Wireless multi-access control means for controlling the memory access operation of the wireless information recording medium in the wireless core module by transmitting to the module or the information generated by one of a plurality of wireless security module to the wireless core module A wireless information recording medium multi-access system, and

A method of accessing a wireless information recording medium having a memory area divided into a common access area and a unique access area by using one antenna and a wireless core module, wherein the radio core module receives the radio frequency signal through the antenna. A first step of accessing a common memory area of the wireless information recording medium, and a second step of transmitting information accessed from the common memory area of the wireless information recording medium to a plurality of wireless security modules (SAMs) according to a predetermined information transmission method. And a third step of receiving a code number system verification result and an identification number verification result generated from one of the plurality of wireless security modules and data and command information for memory access, and receiving the received data and command information. Access the unique memory area of the wireless information recording medium and A fourth step of transmitting back to the wireless security module; and if an additional command is received from the wireless security module after the retransmission, the mobile station returns to the fourth step to execute a command according to the received information; There is provided a wireless information recording medium multi-access method using one wireless core module and an antenna having a fifth step of terminating all operations for recording medium access.

However, since the preceding patent invention presupposes that the memory area of the RF card is divided into a common access area and a unique access area, unlike the basic structure of the current RF card, it does not have a common memory area and a unique memory area. It is not applicable to the current general RF card.

In addition, the preceding patent invention has the economical and time-consuming problem of replacing and replacing all RF cards previously issued and a new RF card having a common memory area and a unique memory area for immediate execution, and all RF cards. In order to approve the use, the common memory area and the unique memory area of the card must be accessed separately, which requires twice as much processing time as the conventional RF card processing time, resulting in an increase in system load due to the increase of processing time. Has its drawbacks.

An object of the present invention is to selectively authenticate their use in a single card terminal for a plurality of RF cards issued by a number of card generators and to quickly collect payments for use of the RF card. The present invention provides a multiple access system and multiple access method for an RF card.

Another object of the present invention is to simply authenticate and process a new RF card simply by inserting only a secure access module without modifying an existing RF card terminal for access to a new card according to the establishment of a new card issuer. The present invention provides a multiple access system and multiple access method for an RF card.

It is still another object of the present invention to sequentially retrieve security kit values of various SAMs mounted in one card terminal, without setting a public key of an RF card and a separate card memory area for storing the public key. The present invention provides a multi-access system and a multi-access method for an RF card that can quickly and accurately process the authentication of the RF card by checking whether the memory area of the RF card approaching the antenna with the kit value is accessed.

1 is a block diagram of a fare automatic toll RF card terminal having a system for selectively multiple access prepaid RF card or postpaid RF card to prepaid SAM and postpaid SAM according to the present invention.

Figure 2 is a block diagram of a fare automatic toll RF card terminal equipped with a multiple access system having a plurality of SAMs for connecting three or more RF cards in multiple according to the present invention.

3 is a flowchart illustrating an RF card multiple access method according to the present invention.

※ Explanation of symbols about main part of drawing ※

10: CPU 11: UART (Universal Asynchronous Transceiver)

12-1 ~ 12-n: SAM (Security Access Module) 13: RF Modulation Demodulation Module

14: ANT 15-1 ~ 15-n: RF card

16: gate control unit 17: alarm generating unit

18: display unit 19: prepaid card fee collection system

20: Postpaid card fee collection system 21: Aggregate computer

22: center computer

In the RF card multiple access method of the present invention for achieving the above object, the RF card serial number information transmission input from the RF card side activated by the radio wave signal of the card terminal determines whether the RF card access to the card terminal. Making a step; If the access of the RF card is recognized, calling the kit value of SAM1 through the UART and attempting to access the memory area of the access RF card using the kit value; Access to the Kit Value of SAM1 When the memory area of the RF card is accessed, the card number information or balance information stored in the memory area is read and the billing routine for the RF card payment payment is executed according to the card payment method. If the memory area of the card is not accessed, the SAM2, SAM3,... Sequentially loading kit values of SAMn and sequentially attempting to access the memory area of the RF card; SAM2, SAM3,… that are sequentially selected through the UART. When the memory area of the RF card is accessed by any of the kit values of SAMn, the card number information or balance information stored in the memory area is read, and the billing routine for the RF card payment is performed according to the card payment method. If the memory area of the RF card is not accessed by the kit value of the SAM, determining that the RF card cannot be used.

The RF card multiple access system of the present invention for achieving the above object is an antenna for generating a radio wave signal for activating the RF card and receiving the chip serial number information and card information sequentially from the RF card; An RF demodulation module for demodulating the RF signal received by the antenna into digital information and modulating the digital kit value information of the SAM into an RF signal; When RF chip serial number information is transmitted from RF card side, it loads kit value of SAM1 through UART and attempts to access memory area of RF card with that kit value. After reading the number information or balance information, perform the charge collection routine for payment fee for using RF card according to the relevant RF card payment method. … A CPU which sequentially attempts to access a memory area of the RF card by sequentially loading kit values of SAMn; A plurality of SAM1 to SAMns having a unique security connection kit value for each card issuer and transmitting the security connection kit value according to a CPU request; And a UART connected between the plurality of SAM1 to SAMn and the CPU to sequentially connect the plurality of SAM1 to SAMn to the CPU 1: 1 according to the control of the CPU.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of an RF card terminal including a multi-access system for an RF card of the present invention, and shows an example in which the RF card terminal is applied to a subway fare automatic collection system.

As referred to herein, the RF card multiple access system generates a radio wave signal for activating the RF cards 15-1 and 15-2, and also provides chip serial number information and card information from the RF card. An antenna 14 which sequentially receives the signals; An RF demodulation module 13 for demodulating the RF signal received by the antenna into digital information and modulating the digital kit value information of the SAM into an RF signal; When RF chip serial number information is transmitted from RF card side, it loads kit value of SAM1 through UART and attempts to access memory area of RF card with that kit value. After reading the number information or the balance information, perform the charge collection routine for payment of RF card payment according to the relevant RF card payment method.If the memory area of the RF card is not accessed by the kit value of SAM1, the kit value of SAM2 is A CPU 10 which loads and attempts to access the memory area of the RF card with this; SAM1,2 (12-1,12-2), which has a unique security connection kit value for each card issuer and transmits the security connection kit value according to the CPU's request, are connected between SAM1,2 and the CPU to control the CPU. Accordingly, the SAM1, 2 comprises a UART (11) for sequentially connecting to the CPU 1: 1.

The RF cards 15-1 and 15-2 may be prepaid cards and postpaid cards having different payment methods. In this case, the prepaid card may be a bus card and the postpaid card may be a national card.

In addition, the CPU 10 connects the gate control unit 16, the alarm generation unit 17, the display unit 18, the prepaid card charge collection system 19, and the postpaid card charge collection system 20 to automatically collect subway fare. Configure the RF card terminal gate system.

In addition, the tally computer 21 is connected to the CPU 10, and the tally computer is connected to the center computer 22, thereby constructing a subway fare automatic collection system.

Referring to the operation of the multiple access system of the present invention configured as described above are as follows.

First, the antenna 14 emits radio waves of 13.56 MHz generated by the RF modulation module. When the RF card 15-1 or 15-2 is approached within the radio wave radiation area of the antenna (a distance within approximately 10 cm from the antenna), the RF card is activated by the radio wave to transmit its RF chip serial number information. RF modulation is transmitted to the antenna 14 side.

The RF modulated signal of the RF chip serial number received by the antenna 14 is demodulated by the RF demodulation module 13 and converted into digital information and then provided to the CPU 10.

When the RF chip serial number information is input to the CPU 10, the CPU 10 determines the access of the RF card and sends a control signal to the UART 11 to select the SAM1 12-1. Load the security kit value from 1).

The CPU 10 attempts to access the memory area of the RF card 15-1 or 15-2 by using the security kit value of the SAM1 12-1 thus loaded. The security kit value of the SAM1 is modulated into an RF signal through the RF demodulation module 13 and transmitted to the RF card side through the antenna 14.

At this time, if the accessed RF card is accessed as a memory kit value of SAM1, the CPU 10 reads the balance information if the accessed RF card is a prepaid card and the card number information for the postpaid card. In the prepaid card fee collection system 19 or the postpaid card fee collection system 20, the collection of the payment amount according to the use of the RF card is performed.

However, if the memory area of the accessed RF card is not accessed with the security kit value of SAM1, the CPU 10 sends a control signal to the UART 11 side to select SAM2 12-2 from the SAM2 12-2. Read his security kit value.

Attempting to access the memory area of the RF card accessed with the kit value of SAM2 read in this way, when the memory area is accessed, the card number information or balance information of the RF card is read and transmitted to the toll collection system, where the RF card The usage fee is collected, and if the memory area of the RF card is not accessed even by the kit value of SAM2, the card is not used and the operation of the gate device is restricted accordingly.

On the other hand, the gate control unit 16 performs a function of selectively limiting whether the card user enters the gate in accordance with the case that the charge collection by the RF card is normal or not, and the alarm generation unit 17 performs an RF card It operates selectively according to the conditions of the approval or disapproval of the fare through, and the display unit 18 displays payment fare information, balance information, etc. of the approved RF card.

In addition, the accounting computer 21 receives the billing information received from a plurality of CPU 10 side, and counts it, and the billing information thus collected is transmitted to the center computer 22 and processed.

FIG. 2 is a block diagram of an automatic fare-collecting RF card terminal equipped with a system for connecting two or more RF cards in accordance with the present invention. As an example, a number of SAMs for each card issuer are installed.

The configuration of the RF card terminal is an antenna 14 for generating a radio wave signal for activating an RF card and receiving chip serial number information and card information sequentially from a plurality of RF cards 15-1 to 15-n. )Wow; An RF demodulation module 13 for demodulating the RF signal received by the antenna into digital information and modulating the digital kit value information of the SAM into an RF signal; When RF chip serial number information is transmitted from RF card side, it loads kit value of SAM1 through UART and attempts to access memory area of RF card with that kit value. After reading the number information or balance information, perform the charge collection routine for the payment fee for using the RF card according to the relevant RF card payment method.If the memory area of the RF card is not accessed with the kit value of SAM1, SAM2, SAM3, … A CPU 10 which sequentially attempts to access the memory area of the RF card by sequentially loading a kit value of SAMn; A plurality of SAM1 to SAMn (12-1 to 12-n) having a unique security connection kit value for each card issuer and transmitting the security connection kit value according to a CPU request; A UART 11 is connected between the plurality of SAM1 to SAMn and the CPU and sequentially connects the plurality of SAM1 to SAMn to the CPU 1: 1 in accordance with the control of the CPU.

The operation of the card terminal having such an RF card multiple access module is not significantly different from the case of the system of FIG. 1, and a unique security access module (SAM) for each card issuer sequentially loaded by the CPU 10 and the UART 11. With the kit value of, the RF card accessing the antenna attempts to access the memory area of the RF card until it reaches the kit value of the last SAM.

3 is a flowchart illustrating a multiple access method for an RF card based on the RF card multiple access system shown in FIGS. 1 and 2.

As referred to herein, the first step determines the access of the RF card to the card terminal, with or without RF chip serial number information transmission input from the RF card side activated by the radio wave signal of the card terminal.

In the second step, when the access of the RF card is recognized, the kit value of SAM1 is called through the UART, and the kit value is attempted to access the memory area of the access RF card.

In the third step, when the memory area of the access RF card is accessed with the kit value of SAM1, the card number information or the balance information stored in the memory area is read and the fee collection routine for the RF card payment is performed according to the card payment method. If the memory area of the RF card is not accessed by the kit value of SAM1, the kit value of SAM2 is retrieved through the UART and this attempts to access the memory area of the RF card.

In the fourth step, when the memory area of the RF card is accessed by the kit value of the SAM2, the card number information or the balance information stored in the memory area is read, and the fee collection routine for the RF card payment is performed according to the card payment method. If the memory area of the RF card is not accessed with the kit value of SAM2, the use of the corresponding RF card is determined.

Similarly, when accessing multiple RF card memory areas using an RF card multiple access module equipped with three SAMs or more SAMs, the RF card approached to the antenna can be selected while assigning multiple SAMs in this manner. Access.

As described above, the present invention selectively authenticates their use in one card terminal for a plurality of RF cards issued by a plurality of card generators, and promptly collects the payment for the use of the RF card. It produces the effect that it can.

In addition, the present invention can simply authenticate and process the new RF card by simply inserting a secure access module without modifying the existing RF card terminal for access to the new card issued by the new card issuer. .

In addition, the present invention sequentially retrieves the security kit values of various SAMs mounted in one card terminal, and attempts to access the RF card memory area that accesses the antenna, thereby setting the public key of the RF card and the public key. RF cards can be authenticated simply and quickly without the need for a separate card memory area for storage.

Claims (6)

An antenna 14 for generating radio wave signals for activating the RF cards 15-1 and 15-2 and sequentially receiving chip serial number information and card information from the RF card; An RF demodulation module 13 for demodulating the RF signal received by the antenna into digital information and modulating the digital kit value information of the SAM into an RF signal; When RF chip serial number information is transmitted from RF card side, it loads kit value of SAM1 through UART and attempts to access memory area of RF card with that kit value. After reading the number information or the balance information, perform the charge collection routine for payment of RF card payment according to the relevant RF card payment method.If the memory area of the RF card is not accessed by the kit value of SAM1, the kit value of SAM2 is A CPU 10 which loads and attempts to access the memory area of the RF card with this; SAM1,2 (12-1,12-2), which has a unique security connection kit value for each card issuer and transmits the security connection kit value according to the CPU's request, are connected between SAM1,2 and the CPU to control the CPU. According to the SAM1,2 sequentially connected to the CPU 1: 1, characterized in that it comprises a UART (11) for the RF card. 2. The multiple access system for an RF card according to claim 1, wherein said RF card (15-1, 15-2) is a prepaid RF card and a postpaid RF card, respectively. 2. The prepaid card billing system 19 and postpaid according to claim 1, wherein the CPU 10 collects the fee from one or two prepaid or postpaid RF cards authenticated by a kit value of a unique SAM. RF card multiple access system, characterized in that it has a billing system (20). A first step of determining the access of the RF card to the card terminal through the RF chip serial number information transmission input from the RF card side activated by the radio wave signal of the card terminal; A second step of, upon recognizing the access of the RF card, attempts to access the memory area of the access RF card by calling the kit value of the SAM1 through the UART; Access to the Kit Value of SAM1 When the memory area of the RF card is accessed, the card number information or balance information stored in the memory area is read, and the fee collection routine for the RF card payment payment is executed according to the card payment method. If the memory area of the RF card is not accessed, a third step of retrieving the kit value of SAM2 through the UART and attempting to access the memory area of the RF card; When the memory area of the RF card is accessed by the kit value of the SAM2, the card number information or balance information stored in the memory area is read, and a fee collection routine for the RF card payment is performed according to the card payment method. And a fourth step of determining whether the corresponding RF card cannot be used if the memory area of the RF card is not accessed. 5. The multiple access method of claim 4, wherein the SAM1 and the SAM2 are respectively a security access module for a prepaid RF card and a security access module for a postpaid RF card. The method of claim 5, wherein the security connection module for the prepaid RF card and the security connection module for the postpaid RF card are each 1 or 2 or more.