Abstract:
PURPOSE: An optical line distribution system is provided to demultiplex an optical signal channel multiplexed through an input optical fiber to switch the demultiplexed optical signal channel, and to re-multiplex the switched optical signal channel to output the multiplexed channel to an output optical fiber, thereby minimizing system control complexity. CONSTITUTION: Optical circulators(301-306) output optical signals whose wavelengths are multiplexed to wavelength division multiplexers/demultiplexers(310-330) connected to the second terminal. The wavelength division multiplexers/demultiplexers(310-330) separate signals corresponding to each wavelength from the optical signals whose wavelengths are multiplexed, which are inputted from the optical circulators(301-306), and output the separated signals to couplers(311-332) connected to individual ports. The couplers(311-332) branch the optical signals, and output the branched signals to optical switching blocks(351-353). The optical switching blocks(351-353) input the optical signals, and distribute the optical signals to desired output terminals.
Abstract:
본 발명은 실외기 성능검사 측정부로부터 자동으로 검사대상 항목에 대한 실측값을 입력 받아서, 이 실측값을 기준값과 비교, 판단하여 실외기를 자동으로 검사할 수 있도록 한 공기조화기의 실외기 성능 합,부 판정장치를 제공하기 위한 것으로서, 공기조화기의 실외기를 운전시키기 위한 성능검사장치와; 상기 실외기의 검사대상 모델을 인식하기 위한 검사대상 모델 인식부와; 상기 성능검사장치에 의해 상기 실외기가 운전될 때, 상기 실외기의 성능을 실질적으로 측정하는 검사대상 항목 측정부와; 상기 검사대상 모델 인식부에 의해 인식된 모델의 검사대상 항목의 기준값을 설정하고, 상기 기준값과 검사대상 항목 측정부로부터 측정된 측정값을 비교, 판단하는 제어부와; 상기 제어부의 제어에 따라 상기 실외기의 성능 합,부를 표시하는 표시부를 포함하는 공기조화기의 실외기 성능 합,부 판정장치를 제공한다.
Abstract:
1. 청구범위에 기재된 발명이 속하는 기술분야 본 발명은 동기화 이더넷에 관한 것으로 특히 동기화 이더넷을 위한 시스템 계층을 구성하는 방법에 관한 것임. 2. 발명이 해결하려고 하는 기술적 과제 본 발명은 동기화 이더넷을 구현함에 있어 상용의 물리 계층 장치와 MAC 장치를 그대로 이용하여 동기화 이더넷을 구현하는 동기화 이더넷 계층 구성 방법을 제공하는데 그 목적이 있음. 3. 발명의 해결 방법의 요지 본 발명은, 동기화 이더넷을 위한 시스템 계층 구성 방법에 있어서, 하드웨어와 직접 관련되어 이더넷 프레임의 입출력을 담당하는 PHY 계층을 제공하는 과정과, 상기 PHY 계층과 데이터 링크 계층 사이를 연결하기 위한 xMII(x Media Independent Interface) 계층을 제공하는 과정과, 동기 프레임에 대한 처리를 위한 동기 프레임 처리부 및 비동기 프레임에 대한 처리를 위한 비동기 프레임 처리부를 포함하는 상기 데이터 링크 계층을 제공하는 과정으로 구성되며, 상기 동기 프레임과 상기 비동기 프레임을 하나의 슈퍼 프레임으로 구성하여 상기 PHY 계층을 통해 전송하고, 전송된 슈퍼 프레임을 상기 동기 프레임과 상기 비동기 프레임으로 파싱하여 상기 데이터 링크 계층으로 전달하기 위한 파서/MUX 부를 상기 xMII 계층에 포함함. 4. 발명의 중요한 용도 본 발명은 동기화 이더넷 등에 이용됨.
Abstract:
Disclosed is a method of managing a Motion Picture Expert Group-2 Transport Stream (MPEG-2 TS) in an object unit of an MPEG-4 by efficiently matching the MPEG-4 with the MPEG-2 TS, in order to broadcast an internet protocol (IP). The method manages MPEG-4 object information in an MPEG-2 TS status, by adding the object information to a program map table (PMT) in the course of converting an MPEG-4 data into an MPEG-2 TS. The method includes the steps of: a) receiving an MPEG-4 SL (Sync Layer) to be transmitted as an MPEG-2 TS; b) acquiring an object information from the MPEG-4 SL; c) aligning the acquired object information corresponding to a program map table (PMT) of the MPEG-2 TS; and d) creating an MPEG-2 TS which has the PMT corresponding to the object information.
Abstract:
본 발명에 따른 엘-밴드 및 씨-밴드 광신호가 전송되는 광섬유 상에 배치되며 병렬 구조의 제1 및 제2 경로를 형성하는 광대역 어븀 첨가 광섬유 증폭기는, 상기 제1 경로 상에 배치되며, 입력된 씨-밴드 광신호를 증폭하는 제1 어븀 첨가 광섬유와, 기설정된 투과 스펙트럼에 따라 상기 어븀 첨가 광섬유로부터 출력된 증폭된 씨-밴드 광신호를 이득 평탄화하는 필터와, 상기 제1 증폭부 및 필터 사이에 배치되며, 상기 증폭된 씨-밴드 광신호를 상기 필터로 출력하고, 상기 필터에서 반사된 씨-밴드 광신호를 상기 제2 경로로 출력하는 써큘레이터를 구비하는 제1 증폭부와; 상기 제2 경로 상에 배치되며, 입력된 엘-밴드 광신호를 증폭하는 제2 어븀 첨가 광섬유를 구비하며, 상기 제2 어븀 첨가 광섬유를 펌핑하기 위해 상기 필터로부터 입력된 상기 반사된 씨-밴드 광신호를 상기 제2 어븀 첨가 광섬유로 출력하는 제2 증폭부를 포함한다.
Abstract:
PURPOSE: A passive optical network of a CDMA method using a multi-carrier is provided to transmit data without a complicated MAC protocol by using the CDMA method as an upstream transmission method. CONSTITUTION: A passive optical network of a CDMA method using a multi-carrier includes a plurality of ONU(Optical Network Unit)/ONTs(Optical Network Terminals), an OLT(Optical Line Terminal), and an optical coupler. The ONU/ONTs(21) use a CDMA method for transmitting data to the OLT and use an Ethernet method for receiving data from the OLT. The OLT is used for receiving the data of the CDMA method from the ONU/ONTs and transmitting the data of the Ethernet method to the ONU/ONTs. The optical coupler(25) is used for coupling optical signals of the CDMA method, transmitting the coupled signals to the OLT and distributing optical signals of the Ethernet method to the ONU/ONTs.
Abstract:
PURPOSE: An optical add/drop multiplexer is provided to reduce the time required in a fabrication process and a manufacturing cost by using an AGW of a 2xN structure for performing simultaneously a multiplexing function and a demultiplexing function. CONSTITUTION: A multiplexer/demultiplexer(210) is connected to an optical fiber and includes an input multiplexing port(211), an output multiplexing port(212), and a plurality of demultiplexing ports(213). The input and the output multiplexing ports are used as an input path and an output path of multiplexed optical signals. The demultiplexing ports are used as an input path and an output path of demultiplexed channels. A plurality of optical circulators(220) includes a first port(221) for receiving an added channel, a second port(222) for receiving an output channel of the corresponding demultiplexing port, and a third port(223) for outputting the output channel of the second port to the outside. A plurality of optical switches are installed among the optical circulators and includes a first input port for receiving an output channel of the third port of the optical circulator, a second input port for receiving the added channel from the outside, a first output port for outputting the added channel to the first port of the optical circulator, and a second output port of outputting the output channel of the first input port of the optical circulator to the outside.
Abstract:
PURPOSE: An optical switching device is provided to consist of circulators and reflectors only, and to set paths of optical signals by using the circulators and the reflectors. CONSTITUTION: Each of circulators(401-404) has the first to fifth ports, and outputs lights inputted in upper ports to adjacent lower ports. The first ports of the first to fourth circulators(401-404) are connected to the first to fourth input ports(IN1-IN4) one to one. The fifth ports of the circulators(401-404) are connected to the first to fourth output ports(OUT1-OUT4) one to one. Middle ports of the circulators(401-404) are connected to middle ports of other circulators. Each of reflectors(411-423) is interposed every two middle ports of different two circulators. Each reflector(411-423) operates according to on/off signals of a controller, reflects an inputted light in on-state, and passes the inputted light in off-state.
Abstract:
PURPOSE: An apparatus and a method for monitoring/correcting a wavelength path in an optical cross-connect are provided to reduce a fabrication cost by reducing the number of optical receivers and optical fiber grids for monitoring a movement path of an optical signal. CONSTITUTION: Laser diodes(110) have wavelength for optical modulation of the ith frequency as generated. Optical delay modules(120) delay the optical modulated ith frequency for a certain time. The first to the Nth wavelength demultiplexer(30) demultiplex the input 1 to input N, respectively. Optical couplers(40) couple outputs of the wavelength demultiplexers(30) with path monitoring information generated by a path monitoring information generator. Optical switches(50) switch optical signals coupled in the optical couplers(40) according to pre-set switching information. Wavelength multiplexers(60) receive signals transmitted from the optical switches(50) and multiplex them. Optical circulators(70) detect path monitoring wavelength from path monitoring information-coupled data outputted from the wavelength multiplexers(60). Optical receivers(80) convert the path monitoring wavelength detected from optical circulators(70) into an electric signal. Optical fiber grids(90) generate output 1 to output N. The ith frequency and time slot detector(150) detects the ith frequency and a tie slot from the electric signal. A comparator(140) compares previously stored routing/switching information and calculated movement path monitoring information. If a path has an error, a switching controller(130) corrects the error by controlling switching of the optical switches(50).
Abstract:
PURPOSE: A WDM(Wavelength Division Multiplexing) self-cure annular optical communication network is provided to reduce capacity of a multiplexer and a demultiplexer of an OADM(Optical Add/Drop Multiplexer) and transmit a signal as it is if it does not need to be loopbacked. CONSTITUTION: OADMs(210a,210b) are provided at an outer side annular network and an inner side annular network and include a demultiplexer and a multiplexer. A pair of switches(110,120) include an input/output terminal for loopbacking an optical signal of a wavelength band processed in one annular network and an input/output terminal for transferring an optical signal of a wavelength band processed in the other annular network, when an error occurs in one optical fiber link among annular networks. WDM filters(310,312,314,316) include a port 1 connected to the switches(110,120) and passing wavelengths of every band, a port 2 passing only an optical signal of a wavelength band processed in one of the annular networks and connected to one OADM of one annular network, and a port 3 passing an optical signal of wavelength processed in the other annular network.