Abstract:
본 발명은 수동형 RFID 환경에서 서브캐리어 수신신호에 대한 RFID 리더 복조 장치 및 방법에 관한 것이다. 즉, 본 발명은 송신 에너지(TX CW) 성분에 의해 발생할 수 있는 DC 오프셋 왜곡 잡음에 의해 왜곡된 서브캐리어 태그신호에 대하여 서브캐리어 디지털 복조 방식으로 태그 정보를 추출하도록 함으로써, DC 오프셋 잡음이 존재하는 수동형 RFID 환경에서 DC 주파수 성분을 가지는 서브캐리어 신호를 수신하여 DC 오프셋 잡음을 효과적으로 제거하고, 서브캐리어 디지털 복조를 통하여 태그 정보를 검출할 수 있다. RFID, 리더, DC 오프셋, 잡음, 서브캐리어, 디지털 복조
Abstract:
PURPOSE: An RFID tag collision sensing apparatus and a method thereof are provided to accurately detect collision generation information by using a collision determining algorithm. CONSTITUTION: A peak signal generating unit(110) generates a peak signal from a tag signal. A peak information extracting unit(141) of a collision sensing unit extracts peak information for collision determination from the peak signal. A collision determining unit(142) determines the generation of tag signal collision. The collision determining unit transfers determined information to a processing unit(400).
Abstract:
PURPOSE: A symbol synchronization apparatus and method of a passive RFID reader are provided to increase the reliability in a symbol synchronization operation which may change anytime according to the operating environment of a passive RFID reader. CONSTITUTION: An edge clock detector(50) generates an edge clock by detecting a reception signal and a phase shift position. A preamble detector(60) analyzes the generation time of the edge clock to detect a preamble section. If the preamble section is detected, a symbol determination timing extractor(70) extracts symbol determination timing by averaging the distance between continuously-generated edge clocks in the preamble section.
Abstract:
PURPOSE: An apparatus and a method for transmitting leakage signal suppression in RFID reader are provided to effectively suppress the leakage signals by controlling the leakage signal of another amplitude/phase through two individual amplitude/phase shifters. CONSTITUTION: A first power distributor(201) distributes a transmission signal. The first power distributor outputs the first transmission signal and the second transmission signal. A first amplitude/phase shifter(206) changes the amplitude and phase of the first transmission signal. The first amplitude/phase shifter creates a first conversion signal. A first power synthesizer(212) synthesizes the first conversion signal with the first leakage signal. The first leakage signal is created to be related to the fourth transmission signal of the second power divider(202).
Abstract:
A method for managing and processing an OMCI message transceiving queue in a GPON system and an apparatus thereof are provided to divide the priority of a control message by using a TCI(Transaction Correlation Indentifier) field within an ONT(Optical Network Terminal) management control protocol message, thereby coping with the alarm of an ONT or control requesting a prompt response quickly to manage and control the ONT. A method for managing and processing the transmission of an OMCI(Optical Network Terminal Management Channel Interface) message comprises the following steps of: generating at least one OMCI management information(S501); setting the priority of the generated OMCI management information(S502); allocating the OMCI management information to a queue set according to the priority(S503); mediating the output of the queue to output the queue in order(S504); dividing the received OMCI management information into an event, high priority, and low priority and receiving the divided OMCI management information by queue(S505); and allocating a threshold value to each queue and disusing the OMCI management information if the OMCI management information inputted to the each queue exceeds the threshold value(S506).
Abstract:
본 발명은 신규 블레이드 탈실장시 특별한 비용 추가나 운용을 필요로 하지 않으면서, 어떠한 상황에서도 고속 시리얼 링크를 자동 활성화시킬 수 있는 ATCA 시스템에서의 고속 시리얼 링크 자동 활성화 장치 및 방법, 그리고 이를 이용한 ATCA 시스템에 관한 것으로서, 이중화된 두 스위치 블레이드와 다수의 가입자 블레이드를 연결하는 고속 시리얼 링크의 자동 활성화를 위하여, 스위치 블레이드의 부팅이 시작되면, 자동 활성화 관리 테이블의 가입자블레이드에 연결된 스위치 블레이드의 물리포트별로 활성화 수행을 위한 기본 정보들을 초기화한 후, 액티브 상태의 스위치 블레이드에서 지원하는 물리포트들을 현재 실장된 가입자 블레이드별 지원 가능한 논리 포트로 매핑하고, 상기 매핑된 논리 포트별로 자동 활성화 수행을 나타내는 기본 상태 변수를 초기화한 후, 가입자 블레이드의 실장 시 해당 고속 시리얼 링크에 대한 파워 시험 및 활성화를 자동으로 수행하는 것이다. 자동 활성화(auto activation), 고속 시리얼 링크(HSS:high-speed SERDES), ATCA(Advanced Telecom Computer Architecture), Ethernet-PON(Ethernet-Passive Optical Network), SNMP(Simple Network Management Protocol), PLL(Phase-Locked Loop)
Abstract:
PURPOSE: A storage interlocking process apparatus in an optical subscriber access system and a method therefor are provided to offer a storage network service in an optical subscriber network with high-speed gigabit or more. CONSTITUTION: A high-speed link management unit(134) divides a data frame received from the outside into a gigabit frame and an optical channel frame, and manages the gigabit frame and the optical channel frame. If a message related to a frame division process is received, a traffic/switch processing unit(135) confirms whether the switch port of a destination is in an available state according to the received message and performs TCP/IP(Transmission Control Protocol/Internet Protocol) engine process. If a message related to a frame is received from the high-speed link management unit(134) and the traffic/switch processing unit(135), a protocol processing unit(136) analyzes header information of a frame of the received message, discriminates a kind of the corresponding frame, and performs each protocol engine process according to the discriminated result. A management control unit(137) controls the high-speed link management unit(134), the traffic/switch processing unit(135) and the protocol processing unit(136) for processing at least two or more data frames.
Abstract:
PURPOSE: An apparatus for connecting AAL2 trunking service in an ATM(Asynchronous Transfer Mode) switching system and a method therefor are provided to improve the efficiency of a bandwidth of an ATM network and increase the use efficiency of resources related to VPI(Virtual Path Identifier)/VCI(Virtual Connection Identifier). CONSTITUTION: A media gateway includes an AAL2(ATM Adaptation Layer type 1) trunking processor taking charge of the transmission and receipt of ATM cells and a non-ATM multiplexor multiplexing the ATM cells received from the AAL2 trunking processor. A fast cell processor matches the ATM cells received from the non-ATM multiplexor. An AAL2 processor converts data received from a fast time switch unit into AAL2 traffic to be assembled as ATM cells. A TDM(Time Division Multiplexing) link unit matches lines having a predetermined transfer rate. The fast time switch unit matches the AAL2 processor with the TDM link unit for switching the same. A management control unit controls the AAL2 trunking processor.
Abstract:
PURPOSE: A dual media gateway device in an ATM switching system is provided to mount ATM physical layer boards and ATM layer functional boards in dual methods, and to separately manage the mounted boards, thereby implementing high reliability and high transmission efficiency when transmitting voice and data. CONSTITUTION: An APIA(ATM Physical Layer Interface Assembly)-A(13) and an APIA-B(14) perform physical layer functions by interfacing with an AIM(ATM Interface Module)(11). An MMCA(Media Gateway Module Control Assembly)-A(15) and an MMCA-B(16) perform ATM layer functions. SUs(Service Units)(17,18) perform narrowband network interworking functions. An alarm block(19) informs a maintenance process of monitored results on the APIA-A(13) and the APIA-B(14), and replaces a link of the AIM(11) with the APIA-A(13) or the APIA-B(14). Either of the MMCA-A(15) and the MMCA-B(16) is activated, and activates either of the APIA-A(13) and the APIA-B(14) to be interfaced with the AIM(11). The inactivated MMCA is activated if the activated MMCA is abnormal.