Abstract:
PURPOSE: An RFID reader demodulation device and a method thereof are provided to perform coherent detection from DC offset noise-removed tag signal, thereby improving the reliability in demodulation of a tag signal, even if offset distortion noise is generated in the receives tag signal. CONSTITUTION: An RFID(Radio Frequency Identification System) reader demodulation device(100) comprises a DC(Direct Current) offset removal unit(102), a carrier removal unit(103), and a phase recover(104). The DC offset removal unit removes DC offset distortion noises of the received tag signal. The carrier removal unit removes a carrier signal in the output signal of the DC offset removal unit. The phase recover detects the phase information in the output signal of the carrier removal unit for the coherent detection.
Abstract:
PURPOSE: An apparatus and a method for suppressing a transmission leakage signal and an rfid reader including the apparatus are provided to suppress a transmission leakage signal, thereby improving isolation of a transceiving signal. CONSTITUTION: The first power splitter(101) outputs the first transmission signal and the second transmission signal. The second power splitter(102) outputs the third transmission signal and fourth transmission signal. An amplitude/phase detector(103) detects a difference value of the amplitude and phase of a receiving signal. An amplitude/phase controller(104) changes the amplitude and phase of the third transmission signal. A power combiner(105) suppresses a transmission leakage signal included in the receiving signal.
Abstract:
본 발명은 ATCA 시스템의 GPON 블레이드에서 GPON 링크 제어 메시지 및 ONT 관리 제어 메시지를 효율적으로 처리할 수 있도록 하기 위한 장치 및 방법에 관한 것으로서, OAM 프로세서와 이더넷 스위치를 포함하는 ATCA 시스템에 구비되는 GPON 블레이드가, 상기 OAM 프로세서와 제어 메시지를 송수신하며, GPON 링크 제어 메시지와 ONT 관리 제어 메시지를 구분하여 GPON 링크 관리 및 ONT 관리를 수행할 수 있도록 하면서 GPON 링크 에러 및 프로토콜 에러를 감시하여 보고하는 제어 메시지 처리부; 상기 제어 메시지 처리부에서 처리되는 제어메시지 중에서, OMCI 메시지를 분석하여 처리하는 OMCI 프로토콜 처리부; GPON 프로토콜 명령어를 처리하면서 GPON 인터럽트 발생을 상기 제어 메시지 처리부에 보고하는 GPON 프로토콜 처리부; 및 상기 복수의 GPON 링크 디바이스와 상기 OMCI 프로토콜 처리부 및 상기 GPON 프로토콜 처리부 간의 PLOAM 메시지를 전달하는 PLOAM 송수신 처리부를 포함한다. GPON(Gigabit-capable Passive Optical Network), ATCA(Advanced Telecom Computer Architecture), PICMG(Peripheral component interconnect Industrial Computer Manufactures Group), OAM(Operations, Administration and Maintenance), PLOAM(Physical layer OAM), OMCI(ONT Management Control Interface)
Abstract:
A GPON blade of an ATCA(Advanced Telecom Computer Architecture) system and a control message processing method are provided to manage a link and an ONT by monitoring an ONT(Optical Network Terminal) error and a GPON link error in real time. A GPON(Gigabit-capable Passive Optical Network) link device(16) is connected to respective GPON links, and transmits and receives a user traffic. A GMII(Gigabit Media Independent Interface) interface user traffic portion(14) delivers the user traffic between the GPON link device and an Ethernet switch. A control message processor(11) communicates a control message with an OAM(Operations, Administration and Maintenance) processor, processes a GPON link control message separately from an ONT management control message, and monitors a GPON link error and a protocol error. An OMCI protocol processor(12) analyzes an OMCI(ONT Management Control Interface) message from the control message. A GPON protocol command processor(13) processes a GPON protocol command and reports a GPON interrupt to the control message processor. A GPON link PLOAM(Physical Layer OAM) transceiver(15) delivers a PLOAM message among the GPON link devices, the OMCI protocol processor, and the GPON protocol processor.
Abstract:
본 발명은 통신 방송 융합 액세스 시스템과 그 방법을 개시한다. 본 발명에 의하면, 통신과 방송을 융합하여 서비스하는 시스템에 있어서, CATV 방송신호, 위성방송 신호를 RF 다중화하고 소정의 파장을 가지는 하나의 광신호로 변환하여 출력한 후, 이 광신호를 인터넷 데이터 신호와 다중화하여 서로 다른 파장을 가지는 광신호들을 다중화하여 융합된 통신방송 광신호를 소정의 광섬유를 통해 전송하는 전송부 및 전송된 광신호를 수신하여 파장대별로 역다중화하여 RF 다중화된 CATV 방송신호 및 위성방송 신호와 인터넷 데이터 신호로 분리하고, RF 다중화된 CATV 방송신호 및 위성방송 신호를 주파수 대역이 다른 것을 이용하여 분리하며, 분리된 각 신호들을 대응하는 단말수단으로 전송하는 수신부를 포함하여, 이러한 시스템을 통해 다양한 종류의 방송 서비스를 통합하여 통합된 방송서비스를 단일 통신망을 이용해서 제공할 수 있으므로, 서비스 제공자의 입장에서는 망의 효율성을 높일 수 있으며 가입자 입장에서는 여러 가지 서비스를 단일 플랫폼으로 제공받을 수 있다는 장점이 있다. 즉 하나의 유선 선로만으로 CATV 방송, 위성 방송, 다채널 인터넷 방송, VOD 방송 등의 통합된 방송서비스와 인터넷 서비스를 동시에 이용할 수 있다.
Abstract:
본 발명은 광 가입자 액세스 시스템에서의 스토리지 연동 처리 장치 및 그 방법에 관한 것이다. 본 발명은 스토리지 연동 처리 장치를 구비하는 광가입자 액세스 시스템에 있어서, 기가비트 프레임 데이터의 송수신을 담당하는 기가비트 정합부, 외부의 스토리지 처리부로부터 광채널 프레임 데이터의 송수신을 담당하는 광채널 정합부, 기가비트 프레임과 광채널 프레임을 구별하며 송수신 버퍼를 관리하는 고속링크 관리부, TCP/IP OFF LOAD 처리 및 흐름 제어를 수행하는 트래픽/스위치처리부, 스토리지 망의 iSCSI(internet Small Computer System Interface) 프로토콜 엔진 및 iSCSI 연결 설정 관련 프로토콜을 수행하는 프로토콜처리부, 고속링크 관리부, 트래픽/스위치 처리부, 프로토콜 처리부를 관리하며 높은 가용성을 가지기 위해 모듈 이중화을 구성하고, 이것을 관리하는 관리 제어부를 포함한다. 이를 통하여, CDN(Content Delivery Network)망 구축 및 EoD(Education on Demand), VoD(Video on Demand) 서비스 구축 시에도 매우 효율적이다. 광 가입자 액세스 시스템, 스토리지, 모듈 이중화
Abstract:
PURPOSE: A method for discriminating a waste frame in an AAL2 switching apparatus is provided to intentionally discriminate a frame to be preferentially wasted by selecting the frame less affecting a service. CONSTITUTION: An AAL2(ATM Adaption Layer2) switching apparatus receives a request for packet transmission(10). The AAL2 switching apparatus judges whether a packet to be transmitted is voice information having continuity(20). If the packet is neither the voice information nor have discontinuity, a frame drop coefficient is initialized as '0'(100). If the packet is the voice information having continuity, it is judged whether the voice information has changes between sound and non-sound(30). If the packet is the voice information having continuity and without the changes between sound and non-sound, it is judged whether a continuous coefficient is a threshold n(40). If not, the AAL2 apparatus increases the continuous coefficient by 1(50). If so, the AAL2 apparatus initializes the continuous coefficient as '0' and the frame drop coefficient is increased by 1(60). The AAL2 apparatus judges whether the frame drop coefficient reaches m(70). If so, the AAL2 apparatus maintains the current frame drop coefficient(90). If not, the frame drop coefficient is increased by 1(80).
Abstract:
PURPOSE: A VOD(video On Demand) system using an iSCIS(Internet Small Computer System Interface) is provided to enable a subscriber to connect directly to a storage by using internet protocol based SAN(Storage Area Network) technique. CONSTITUTION: The VOD system comprises plural clients(210), a contents database and a controlling server(230). Each client(210) includes a TV(211) or a PC(212) as a user terminal, and an iSCSI STB(213). The contents database provides multimedia contents data to the clients(210). The controlling server(230) for authentication bill manages plural contents database at a remote place. The contents database comprises an iSCSI gateway(221), an iSCSI storage(222), and an FC storage(223). The controlling server(230) performs authentication/payment/management function for the usage of the contents database. The client(210) directly accesses to the target storage by using iSCSI technique.
Abstract:
PURPOSE: A method for discriminating a waste frame in an AAL2 switching apparatus is provided to intentionally discriminate a frame to be preferentially wasted by selecting the frame less affecting a service. CONSTITUTION: An AAL2(ATM Adaption Layer2) switching apparatus receives a request for packet transmission(10). The AAL2 switching apparatus judges whether a packet to be transmitted is voice information having continuity(20). If the packet is neither the voice information nor have discontinuity, a frame drop coefficient is initialized as '0'(100). If the packet is the voice information having continuity, it is judged whether the voice information has changes between sound and non-sound(30). If the packet is the voice information having continuity and without the changes between sound and non-sound, it is judged whether a continuous coefficient is a threshold n(40). If not, the AAL2 apparatus increases the continuous coefficient by 1(50). If so, the AAL2 apparatus initializes the continuous coefficient as '0' and the frame drop coefficient is increased by 1(60). The AAL2 apparatus judges whether the frame drop coefficient reaches m(70). If so, the AAL2 apparatus maintains the current frame drop coefficient(90). If not, the frame drop coefficient is increased by 1(80).
Abstract:
PURPOSE: A method for controlling non-ATM service connection at a media gateway is provided to integrate the operation of individual interworking modules into one standard connection control method by performing connection control at the media gateway in matching Non-ATM service in an ATM exchange, thereby reducing costs of system configuration and operation. CONSTITUTION: A management control part initializes interrupt of a processor and hardware of a media gateway Non-ATM multiplexing process block(301). An ATM/Non-ATM connection set table is initialized and a default transmitting and receiving channel is set for transmitting a start-notifying message to a Non-ATM main processor(302-304). Each hardware device of High-speed link part, a traffic/switch processor, and an ATM multiplexing process part within the Non-ATM multiplexing process block, is examined(305-310). If an error is generated in each device, the device is reset and the error is displayed, and a failure in initialization is reported to the NON-ATM main processor(313,314). If there is no error, a success in initialization is reported to the NON-ATM main processor for activation(311,312). Connection set-up and error process of each service of Non-ATM service processing blocks are performed through a high-speed link part of a Non-ATM multiplexing process block. Release set-up and examination of each service of Non-ATM service processing blocks are performed through a high-speed link part of a Non-ATM multiplexing process block.