Abstract:
본 발명은 비접촉식 IC 카드 리더기와 다수의 카드간의 데이터 충돌 방지 장치 및 방법에 관한 것으로, 비접촉식 IC 카드 리더기는 다수의 비접촉식 IC 카드중 소정의 비접촉식 IC 카드들이 근접하여 감지되는 감지 신호와 근접되는 소정의 비접촉식 IC 카드 개수를 감지하는 센서 회로부와; 센서 회로부에 의해 감지된 감지 신호와 개수를 패스(pass)시키고, 고주파수의 전원을 발생시키는 전원 스위치를 조절하도록 제어하는 전원 제어 회로부와; 전원 제어 회로부의 스위치 조절에 의해 고주파수의 전원을 발생시키며, 전원 제어 회로를 통해 패스된 요구 신호를 포함한 전자파를 제공하는 전원부와; 전원부로부터 제공된 전자파가 안테나를 통해 발생할 수 있도록 전자파 정합을 제어하며, 소정의 비접촉식 IC 카드가 근접할 경우, 발생된 고주파수의 전원을 제공하는 정합 회로부와; 전원 제어 회로부로부터 제공되는 소정의 IC 카드에 대한 감지 신호와 개수에 따라 활성화한 후, 요구 신호를 포함한 전자파를 제공하며, 소정의 비접촉식 IC 카드로부터 제공되는 요구 신호에 대한 응답 여부를 판단하여 요구 신호에 대한 응답이 있으면서 데이터 충돌이 발생할 경우, 충돌 방지 절차를 수행하는 내부 회로부를 포함하며, 다수의 비접촉식 IC 카드는 비접촉식 IC 카드 리더기의 안테나를 통해 발생되는 전자파가 다수의 비접촉식 IC 카드 내 안테나로 유기 결합되어 유기 전력(power)이 제공되면, 제공된 유기 전력을 유기 전압으로 생성하는 정류 회로와, 정류 회로로부터 제공되는 유기 전압에 의해 소정의 비접촉식 IC 카드를 활성화시키는 내부 회로를 구비한다. 따라서, 카드 리더기의 효율적인 전력 소모 및 안정적인 전원 공급을 제공하며, 근접된 비접촉식 IC 카드의 개수가 여러 개일 때 발생하는 충돌 방지 절차를 수행함에 있어서, 충돌 방지 절차 수행 전에 감지된 카드 개수를 알고 있어 감지된 개수와 동일한 카드의 카드 아이디를 확인했다면, 더 이상의 충돌 방지 절차는 수행하지 않아 보다 빠른 시간 내에 근접된 모든 카드와 통신이 가능한 효과가 있다.
Abstract:
PURPOSE: A method for measuring a card performance of a smart card is provided to compare and analyze the performance of diverse cards by measuring the time required to process an instruction within the card. CONSTITUTION: A dummy instruction is transmitted to a card applet in order to set up a performance measuring standard by using a terminal or a host application program(S83). A turnaround time is obtained through a timer function of the host application program by measuring the time required to respond after the card applet carries out the dummy instruction. The instruction to be measured is transmitted to the smart card by using the terminal or the host application program(S85). The time required to process the instruction is calculated after confirming a reply for the instruction from the smart card(S93). An accurate time required to process the instruction at the smart card is calculated based on the turnaround time and the passing time(S94).
Abstract:
A wireless communication medium includes an antenna, an analog signal processor, a digital signal processor, and a central processing unit & logic module. The antenna transmits and receives a signal to and from an external apparatus. The analog signal processor converts an analog signal to a digital signal, and converts a digital signal to an analog signal. The digital signal processor demodulates the digital signal, detects the start and end of data, and generates a first control signal for determining whether data is transmitted to the external apparatus and a second control signal for perceiving the end of data, blocking the reception of data, modulating data, and determining whether modulated data is transmitted to the external apparatus. The central processing unit & logic module processes data received from and transmitted to the external apparatus. Accordingly, an efficiency of processing a RF signal can be improved.
Abstract:
PURPOSE: A integration payment system of a toll and a parking fee by using an integrated circuit(IC) card for use in a multi type non-contact electronic money and a method for the same are provided to have an additional requirement for the payment system to each of the toll payment system and the parking fee payment system by integrating each of the systems. CONSTITUTION: A integration payment system of a toll and a parking fee by using an integrated circuit(IC) card for use in a multi type non-contact electronic money includes a plurality of non-contact electronic money IC card(200), a vehicle enter monitoring unit(103), a vehicle classifier(104), a gate number and time setting unit(106), a fee calculation unit(107), a card read and communication unit(101) and a secure application module(SAM)(102). The fee calculation unit(107) calculates the IC card transaction fee by using the sensed vehicle kind, the in and out gate number of the set vehicle gate and/or the time of the in and out vehicle. The card read and communication unit(101) recognizes the non-contact electronic money IC card and communicates with the non-contact electronic money IC card. And, the secure application module(SAM)(102) performs the authentication with the IC card by using the key set of the non-contact electronic money IC card.
Abstract:
PURPOSE: A smart card, and its OS(Operating System) management method are provided to make it possible to store the OS program at a flash memory of a smart card via a card reader, and executing the OS program. CONSTITUTION: The method comprises several steps. A CPU of a smart card, if powered on, checks whether a ROM/flash selection signal of the smart card is detected(S10). In a case that the ROM selection signal is detected, a memory controller changes a structure of a semiconductor memory(S12). Then, the CPU checks whether a signal input via a card reader is a flash memory deletion or programming signal(S14). In a case of a flash memory deletion signal, the CPU activates a control program stored at a ROM, and deletes the flash memory according to the control program(S16). On the contrary, in a case of a flash memory programming signal, the CPU loads the OS program codes, transmitted via the card reader, at corresponding addresses of the flash memory according to the control program(S18). In a case that the flash selection signal is detected in the step S10, the memory controller changes a structure of a semiconductor memory for excluding the ROM from an actual executing structure(S20).
Abstract:
PURPOSE: A device and a method for protecting digital contents CONSTITUTION: A management server(10) stores and manages the encrypted digital contents, and provides the public key. A smart card(30) carries out a multiple application service and an encryption algorithm operation, and decrypts and uses the encrypted digital contents by embedding with the symmetric key and a secret key. A digital contents provider(20) makes the digital contents, transmits the digital contents after the encryption to the management server(10), and stores it in the management server(10). A smart card terminal receives the encrypted digital contents and the key information from the management server(10) if a user inserts the smart card(30), decrypts the symmetric key encrypted by the secret key in the smart card(30), decrypts the encrypted digital contents by using the symmetric key, and provides the decrypted digital contents to the user.
Abstract:
PURPOSE: A smart card, and its OS(Operating System) management method are provided to make it possible to store the OS program at a flash memory of a smart card via a card reader, and executing the OS program. CONSTITUTION: The method comprises several steps. A CPU of a smart card, if powered on, checks whether a ROM/flash selection signal of the smart card is detected(S10). In a case that the ROM selection signal is detected, a memory controller changes a structure of a semiconductor memory(S12). Then, the CPU checks whether a signal input via a card reader is a flash memory deletion or programming signal(S14). In a case of a flash memory deletion signal, the CPU activates a control program stored at a ROM, and deletes the flash memory according to the control program(S16). On the contrary, in a case of a flash memory programming signal, the CPU loads the OS program codes, transmitted via the card reader, at corresponding addresses of the flash memory according to the control program(S18). In a case that the flash selection signal is detected in the step S10, the memory controller changes a structure of a semiconductor memory for excluding the ROM from an actual executing structure(S20).
Abstract:
PURPOSE: An optical network interface apparatus and a method of the same is provided to directly match the optical network interface apparatus with a subscriber's server by effectively using the wavelength with being in harmony with a dense wave division multiplexing(DWDM) characteristics of an internet protocol network based on a wave division multiplexing. CONSTITUTION: An optical network interface apparatus capable of directly matching with a subscriber's server by effectively using the wavelength with being in harmony with a dense wave division multiplexing(DWDM) characteristics of an internet protocol network based on a wave division multiplexing includes a transmitter, a receiver, a controller for controlling functions of the transmitter and the receiver and a storing member for storing the wavelength and the IP address and providing the stored wavelength and the IP address to a framing processor and reframing processor. The transmitter includes the framing processor for being inputted through the input interface based on the wavelength information and the IP address of the network and proceeding a data link hierarchy and a physical hierarchy to the IP packet to be transmitted and an electro-optical conversion and transmitting processor. The receiver includes an electro-optical conversion and receiving processor for electro-optical converting a capsulized IP packet received from an optical waveguide and the reframing processor for proceeding a physical hierarchy and a data link hierarchy process of a signal processed in the electro-optical conversion and receiving processor based on the wavelength information and IP address information of the network.
Abstract:
PURPOSE: A method for managing a stack for a real time system is provided to protect and operate a system safely without allocating memories by sensing an excessively allocated memory in a user mode, preventing an overflow of a stack in a system mode, and preventing a memory from being damaged caused by a stack overflow of a process. CONSTITUTION: A stack memory for a system is allocated through a system stack allocating unit(201). If a stack memory allocating request is received while a process is created(202), a necessary stack memory is allocated according to each process through a process stack allocating unit(203). If a fault is received while the process is performed(204), a stack related fault process is performed in a stack fault processing unit(205). Finally, if a stack memory collecting request is received while a process is terminated(206), the corresponding stack memory is collected(207).
Abstract:
PURPOSE: A method for overcoming ethernet communication fault in the duplicated switching system is provided to ensure the continuity of service only with the transfer of the duplicated switching system without using additional hardware to process a fault of the ethernet communication. CONSTITUTION: If a user application program requests message transmitting through SROS (Scalable Real-time Operating System)(301), an ethernet server processes the related protocol(302). In case that a hardware controller informs the generation of a link fault(303), an ethernet device driver transmits a packet(304). In case that the link fault has been confirmed, the control is handed over to a link fault processor(309). If the interrupts generated after the ethernet device driver transmits a packet are all normal transmitting complete, a link fault counter and a link fault transfer variable are initialized(307,308). A link fault management part of the ethernet server increases the link fault counter(309). If the increased link fault counter does'n't exceed an appointed maximum value, the user application program requests the next message transmitting(310). If the increased link fault counter exceeds an appointed maximum value, the link fault counter is initialized and the transfer is tried(311).