Abstract:
A burst mode receiver for generating a on-chip reset signal and a burst mode receiving method are provided to generate the on-chip reset signal without a separate apparatus such as a bottom-hold circuit to obtain a quick response without supplying the reset signal to the outside, thereby applying the on-chip reset signal to an EPON(Ethernet Passive Optical Network) ideally. A burst mode receiver includes a burst mode receiving unit and a control unit. The burst mode receiving unit comprises a photo detector(10), a dummy TIA(Trans Impedance Amplifier)(12), a single-to-differential converter(13), a differential amplifier(14). The control unit comprises an AGC(Auto Gain Control) control unit(15), first and second LPFs(Low Pass Filters)(16,17), a differential quantizer(18), a logic control unit(19). The photo detector converts an input optical signal into a current signal. The core TIA amplifies a current outputted in a photo diode and converts the amplified current into a voltage. The single-to-differential converter compares a single terminal output voltage outputted by a core TIA(11) with a bias voltage generated by the dummy TIA to convert signal terminal output into differential output of which the phase is contrary to that of the bias voltage from the dummy TIA. The differential amplifier provides the amplification and output impedance matching of the differential output of the signal-to-differential converter and performs offset correction as necessary. The AGC control unit detects the voltage of the output terminal of the single-to-differential converter and outputs a digital control signal for AGC. The LPFs output substantial DC(Direct Current) values for the voltage swings of node 3 and node 4. The differential quantizer quantizes a difference between voltage outputted from the LPFs and outputs the difference as a digital value, and outputs a reset_enable signal in the falling edge of a burst signal with high power. The logic control unit generates an AGC signal from the output of the AGC control unit and outputs the AGC signal to the core TIA to control the gain of the core TIA.
Abstract:
온칩 리셋 신호를 생성하는 버스트 모드 수신기 및 버스트 모드 수신 방법이 개시된다. 본 발명의 버스트 모드 수신기는 입력 버스트 신호를 증폭하고, 증폭된 신호를 차동 신호로 변환하는 버스트 모드 수신부; 및 입력 버스트 신호가 기준 파워 이상이면 차동 신호간 차를 이용하여 리셋 신호를 생성하고, 생성된 리셋 신호를 이용하여 내부를 리셋하는 제어부를 포함함을 특징으로 한다. 온칩 리셋 신호, 버스트 신호, 버스트 모드 수신기, 차동 신호
Abstract:
A scheduling apparatus calculates a packet start time with respect to an input packet and a scheduler including a plurality of slots selects a slot corresponding to the packet start time. Furthermore, the apparatus performs a scheduling by considering the number of packets stored in a selected slot and the number of packets corresponded to a virtual port--The virtual port is an output port of a switch device connected to the outside without a scheduling function--corresponding to the inputted packet after determining whether to save the packet in the selected slot. [Reference numerals] (1) Packet switch system; (10) Switch unit; (100) Scheduling apparatus; (20,AA,BB) Input unit; (30,CC,DD) Output unit; (EE) Compact switch; (FF) Output port; (GG) Virtual port
Abstract:
DPI 기능을 이용한 끊김 없는 맞춤형 서비스 제공 시스템 및 방법을 개시한다. 맞춤형 서비스 제공 시스템은 미디어의 시그니처를 인식하고, 상기 인식된 시그니처에 수록된 미디어의 해상도, 사용자가 보유한 단말기의 해상도와 사용자 요구 사항 정보에 따라 미디어 해상도를 변환하는 스위치와, 단말 인증 또는 사용자 인증을 수행하는 인증 관리 서버 및 상기 단말기 기능, 미디어 특성, 사용자의 요구 사항을 고려하여 경로를 설정하는 정책 제어 서버를 포함한다. DPI, 맞춤형, 응용 서비스
Abstract:
PURPOSE: A passive optical network providing connection management server of a packet transmission layer method based on an ethernet is provided to operate PTL(Packet Transport Layer) between an ONU(Optical Network Unit) and an ONT(Optical Network Terminal)(130) by applying PLT method technology to the end of the ONU/ONT. CONSTITUTION: A connection management server(110) establishes channels(C1~C3) and a channel group(10). The connection management server manages the connection state of all sections. A PTL connection is established between the ONU/ONT of a subscriber end and the ONU/ONT of other subscriber end. A PTL-PON(Passive Optical Network) method is applied to a PON section located between OLT(Optical Line Terminal)(120) and the ONU/ONT.
Abstract:
PURPOSE: A cost managing server for customized content service and charging method thereof are provided to charge a content service in consideration of network performance, service quality, content property, and content capacity. CONSTITUTION: A charging information collecting unit(500) collects content fee, content data transmission path fee, and charging information about content data capacity. A service charging unit(510) charges content service fee by combining content fee, path fee, and content service fee based on the collected charging information. The charging information collecting unit collects charging information from a network switch.
Abstract:
PURPOSE: A network access device and a packet transmitting method preformed in the device are provided to automatically transmit a packet entering from an external network such as a sensor network to an IP network to one or a plurality of designated destinations or an operator. CONSTITUTION: A packet receiving unit(400) receives a packet from an external network. A packet processing unit(410) grasps the type of packet by analyzing application layer information of the received packet. A packet processing unit modifies a destination address of a received packet into a preset destination address about the grasped type. A packet transmitting unit(420) transmits the destination address-modified packet to a destination.
Abstract:
PURPOSE: An optical distribution device for a passive optical network is provided to connect more subscriber terminal in one optical path without enhancing an optical power output of a subscriber terminal. CONSTITUTION: A plurality of first lens units(210) transforms a upstream optical signal which is respectively outputted form optical lines(131,132) connected to each optical network terminal into parallel light. The second lens unit(220) connects the parallel light respectively outputted from a plurality of first optical lens units. The second lens unit makes the connected parallel light to the optical path connected to an optical line terminal to be incident. The second lens unit transforms the downstream optical signal outputted from the optical path to the optical line terminal to a plurality of parallel lights.
Abstract:
패킷 스위치에서 패킷을 스케줄링하는 패킷 스케줄링 장치 및 방법이 개시된다. 본 발명의 패킷 스케줄링 장치는, 입력 패킷을 저장하는 패킷 메모리; 세션별 허용 대역폭을 포함하는 파라미터를 저장하는 세션 파라미터 저장부; 상기 입력 패킷의 세션 식별자를 가지고 상기 세션 저장부의 해당 파라미터를 검색하고, 검색된 파라미터의 허용 대여폭을 고려하여 상기 패킷의 출발시각을 산출하는 출발시각 산출부; 상기 산출된 출발시각에 상기 패킷이 출발하도록 스케줄링하는 스케줄러; 및 상기 스케줄링에 따라 상기 패킷 메모리에 저장된 해당 패킷을 출력하는 패킷 출력부;를 포함한다. 이에 의해 가입자의 가입 서비스 종류에 따라 다양한 스케줄링이 가능하다.