Abstract:
An apparatus for monitoring an optical fiber link is provided to measure the length of an optical fiber more precisely by using inspection light rather than reflective light. An apparatus for monitoring an optical fiber link includes a first node(210) and a second node(250), which are connected by an optical fiber link(290). The first node includes an optical transmitter(220), a first optical fiber link monitoring device(230), and a first multiplexer(240). The second node includes an optical receiver(270), a second optical fiber link monitoring device(280), and a second multiplexer(260). Each of the first and second optical fiber link monitoring devices comprises a transmitting part(234,284), a receiving part(236,286), an optical distributor(238,288), and a processor(232,282).
Abstract:
본 발명은 시분할 듀플렉싱 방식의 이동통신 시스템에서 무선 상하향 신호를 송수신하기 위한 무선광섬유 링크 장치에 관한 것이다. 본 발명의 시분할 듀플렉싱 방식 무선광섬유 링크 장치는 이동통신 시스템의 기지국으로부터 무선주파수 신호를 수신하고, 상기 시분할 듀플렉싱 신호의 스위칭에 따라 바이어스 제어되어 상기 무선주파수 신호를 광신호로 변조하는 제1 전광변환부를 구비하는 중앙기지국과; 상기 중앙기지국으로부터 광섬유를 통해 전송되는 상기 광신호를 무선주파수 신호로 변환하는 제1 광전변환부를 구비하며, 상기 무선주파수 신호를 안테나를 통해 이동통신 단말로 전송하는 중계기의 리모트를 포함함을 특징으로 한다. 시분할 듀플렉싱, 무선광섬유, 바이어스
Abstract:
A network traffic distribution method and a network system using the same are provided to open or close a port selectively according to the amount of network traffics, thereby scattering traffic concentration in a network. A network traffic distribution method comprises the following steps. A bridge checks the amount of traffics and confirms whether the checked traffic amount is bigger than a predetermined value(S101,S102). If so, it is confirmed whether a frame is transmitted from an edge port formed to be directly connected to the bridge(S103). If so, the frame is outputted to a substitution port(S104).
Abstract:
A symbol error rate-based adaptive power allocation scheme for OSTBC and beam forming in a DWCS is provided to estimate large-scale fading and nakagami fading parameters in a transmitter, thereby minimizing the SER of MQAM(M-ary Quadrature Amplitude Modulation) and MPSK(M-ary Phase Shift Keying) symbols. A adaptive power allocation scheme for OSTBC(Orthogonal Space Time Block Codes) and beam forming in a DWCS(Distributed Wireless Communication System) comprises the following steps of: setting i to one, A to Ai, and P and P0 to one, wherein A is the optimal antenna sub set, and P is a quasi or optimal SER(Symbol Error Rate)(401); estimating DOA(Direction Of Arrival) for each sub array and generating an array response vector for the each antenna sub array(402); calculating a quasi or optimal SER Pi for the sub set Ai by using quasi and optimal power allocation schemes, PAS1(Power Allocation Scheme1) and PAS2(403); checking whether the calculated SER Pi is less than or equal to Pi-1(404); setting A to Ai and P to Pi if the Pi is less than or equal to Pi-1(405); checking whether I is less than 2^l-1(406); and adding one to i when I is less than 2^l-1(407).
Abstract:
An organic light emitting diode display is provided to prevent display quality of the organic light emitting diode display from being deteriorated by forming a heat radiation pattern including thermal conductive particles on an exterior surface of a substrate surrounding a display element. An organic light emitting diode display(1) includes a first substrate(100), a display element(150), a second substrate(200), and a heat radiation pattern(400). The display element includes a pixel electrode, a light emitting layer, and a common electrode. The pixel electrode, the light emitting layer, and the common electrode are sequentially formed on the first substrate. One surface of the second substrate is opposed to the display element. The heat radiation pattern is formed on the other surface of the second substrate and includes a sealing resin and thermal conductive particles dispersed in the sealing resin.
Abstract:
An organic electro-luminescence display and a fabricating method thereof are provided to reduce an error due to the dropping of a substrate by forming a support on the substrate. An organic electro-luminescence display includes a first substrate(1), a second substrate(3), and a bonding agent. A display element(15) is formed on the first substrate. The second substrate protects the display element while facing the first substrate. The bonding agent is interposed between the first and second substrates to bond the first and second substrates. The first substrate includes a gate line, a data line and a pixel cell. The pixel cell defined by crossing the gate line and the data line is formed in a pixel area. The display element is formed between a first electrode(9) and a second electrode(11).
Abstract:
An absorbent, a binder, a getter comprising the absorbent, a getter comprising the binder, and a display device comprising the getter are provided to improve the efficiency in gas-permeable property, durability, and moisture or oxygen-adsorbable performance. An absorbent for a getter of a display device comprises an organic aluminum compound represented by a chemical relation 1. In the chemical relation 1, R1, R2, and R3 are selected from a group consisting of an alkyl group, a cyclo-alkyl group, alkoxy group, and a combination thereof, which are independently substituted. The alkyl group has one to eighteen carbons. The cyclo-alkyl group has five to eight carbons.
Abstract:
본 발명은 브리지형 휴대 인터넷 시스템에 있어서, 전체적으로 메시(mesh) 구조로 연결되어 코어 네트워크를 형성하며, 2계층 스위치로 구성되는 다수의 에지 브리지와, 다수의 에지 브리지 중 하나와 연결되어 서비스 범위내의 MN(Mobile Node)에 휴대 인터넷 서비스를 제공하는 다수의 RAS(Radio Access Station)와, 네트워크 구성 요소들의 이웃 탐색(neighbor discovery)을 지원하며 구성 요소들의 구성 정보를 관리하는 NDS(Neighbor Discovery Server)를 포함하며, 다수의 에지 브리지는 NDS로부터 구성 정보를 참조하여, 해당 RAS를 통해 자신에게 연결된 MN이 전송한 MAC(Media Access Control) 프레임의 목적지를 확인하여 해당 CN이 연결된 에지 브리지의 MAC 주소로 해당 MAC 프레임을 맥인맥 인캡슐레이션(MAC in MAC encapsulation)하여 전송하며, 자신의 MAC 주소를 목적지로 하는 맥인맥 인캡슐레이션된 프레임을 수신하면 외부 MAC(outer MAC) 주소를 제거하고 원래의 MAC 프레임을 해당 MN으로 전달한다. 휴대, 인터넷, 브리지, 핸드오버, 이더넷
Abstract:
An organic electroluminescent display and a method for fabricating the same are provided to obtain a high light emitting efficiency by including convex patterns made of a sealant. An organic electroluminescent display(100) includes a first electrode(120), an organic light emitting layer(140), a second electrode(150), and a plurality of convex patterns(165). The first electrode, the organic light emitting layer, and the second electrode are formed on one surface of an insulation substrate(110) sequentially. The plurality of convex patterns are made of a transparent sealant with a viscosity of 5,000cp to 150,000cp and formed on the other surface of the insulation substrate. The sealant includes epoxy resin or acrylate based resin, wherein the resin is thermosetting resin or ultraviolet curable resin.
Abstract:
An organic light emitting display device and a manufacturing method thereof are provided to prevent oxygen and heat from degrading the display device by quickly discharging heat from an organic light emitting member or an electrode. An organic light emitting display device includes an insulation substrate(110), plural TFTs, a pixel electrode(191), an organic light emitting member(370), a common electrode(270), and a sealing member(400). The TFTs(Thin Film Transistors) are formed on a display region of the insulation substrate. The pixel electrode is connected to the TFTs. The organic light emitting member is formed on the pixel electrode. The common electrode is formed on the organic light emitting member. The sealing member is formed on the common electrode and contains a seal resin, on which heat conductive particles with a heat conductivity higher than 10W/mK are distributed.