公开(公告)号：KR100453818B1

公开(公告)日：2004-10-20

申请号：KR1020020031590

申请日：2002-06-05

Applicant: 한국전자통신연구원

Inventor： 최현균 ,  유태환 ,  이종현

IPC: H04L12/28

Abstract: PURPOSE: An ONU(Optical Network Unit) in an FTTH(Fiber To The Home) is provided to use WDM(Wavelength Division Multiplexing) optical fiber between OLTs(Optical Line Terminations), and to use single-mode optical fiber between subscribers. CONSTITUTION: A PON(Passive Optical Network) slaver(410) extracts ATM cells by distinguishing an ATM cell boundary from downlink data, and inserts the ATM cells into uplink data. An ATM layer functional unit(420) multiplexes the ATM cells by receiving the extracted ATM cells, and decides whether a communication channel is normally set. ATM155 physical layer functional units(430) transceive the ATM cells with the ATM layer functional unit(420), and transmit data received from the ATM layer functional unit(420) to ATM155 interface devices through single-mode optical fiber. A controller(440) initializes each unit, monitors performance, and processes failures.

Abstract translation: 目的：提供FTTH（光纤到户）中的ONU（光网络单元），以在OLT（光线路终端）之间使用WDM（波分复用）​​光纤，并在用户之间使用单模光纤。 组成：PON（无源光网络）从机（410）通过区分ATM信元边界和下行数据来提取ATM信元，并将ATM信元插入上行数据。 ATM层功能单元（420）通过接收提取的ATM信元来复用ATM信元，并判定通信信道是否被正常设置。 ATM155物理层功能单元（430）与ATM层功能单元（420）收发ATM信元，并且通过单模光纤将从ATM层功能单元（420）接收的数据发送到ATM155接口设备。 控制器（440）初始化每个单元，监视性能并处理故障。

公开(公告)号：KR1020040084620A

公开(公告)日：2004-10-06

申请号：KR1020030019821

申请日：2003-03-29

Applicant: 한국전자통신연구원 ,  학교법인 한국정보통신학원

Inventor： 강호용 ,  최현균 ,  유태환 ,  이형호 ,  이상국 ,  이만섭 ,  서자원

IPC: H04L25/03

CPC classification number: H04B10/693

Abstract: PURPOSE: A burst-mode optical receiver using an extinction ratio characteristic of a received optical signal is provided to minimize distortion of a waveform of an output signal by detecting correctly a top peak voltage and a bottom peak voltage of a real burst packet. CONSTITUTION: A photo diode(PD1) is used for converting an optical signal having an extinction ratio characteristic and a burst characteristic to a current signal. A pre-amplifier(300) is used for converting the current signal to a voltage signal and amplifying the voltage signal. A first peak detector(310) is used for detecting a top peak voltage and a bottom peak voltage and outputting an intermediate value of the top peak voltage and the bottom peak voltage as a first reference voltage. A first limiting amplifier(320) is used for amplifying a difference between the amplified signal of the pre-amplifier and the first reference voltage. A buffer(350) is used for buffering an output signal of the first limiting amplifier. A first bottom peak detector(360) is used for outputting a bottom peak of an output signal of the buffer as a control signal.

Abstract translation: 目的：提供使用接收光信号的消光比特性的突发模式光接收机，通过正确地检测真实脉冲串分组的顶峰电压和下峰值电压来最小化输出信号的波形失真。 构成：光电二极管（PD1）用于将具有消光比特性和突发特性的光信号转换为电流信号。 前置放大器（300）用于将电流信号转换为电压信号并放大电压信号。 第一峰值检测器（310）用于检测顶峰电压和下峰值电压，并输出顶峰电压和下峰值电压的中间值作为第一参考电压。 第一限幅放大器（320）用于放大前置放大器的放大信号与第一参考电压之间的差值。 缓冲器（350）用于缓冲第一限幅放大器的输出信号。 第一底峰检测器（360）用于输出缓冲器的输出信号的下限峰值作为控制信号。

公开(公告)号：KR100367086B1

公开(公告)日：2003-01-09

申请号：KR1020000081016

申请日：2000-12-23

Applicant: 한국전자통신연구원

Inventor： 최현균 ,  유태환 ,  이종현

IPC: H04L12/28

Abstract: PURPOSE: An optical network unit for audio and broadband data service is provided to adopt IEEE 1394 interface capable of transmitting service data such as video on demand, digital CATV, a high image quality teleconference etc. CONSTITUTION: A media connection unit(2) is connected to an ODN(Optical Distribution Network) constructed by a manual optical splitter between the OLT(Optical Line Termination) toward an ATM network by using a single optical line as a star topology type. A Physical layer unit(3) charges a P/S conversion, a clock restoration and S/P conversion, and PON slave functions. An ATM layer unit(4) receives an ATM cell stream provided from the physical layer unit(3) and checks whether the cell stream is connected and set to the inside of a system normally through a VPI/VCI as a connection discrimination field. An AAL1(ATM Adaptation Layer 1) function unit(6) has timing information and clock related functions for providing a real time service and is interfaced with an E1/POTS subscriber interface unit(8). An AAL5 function unit(7) is interfaced with an Ethernet interface unit(9) and an IEEE 1394 interface unit(10). A power supply unit(12) is constructed independently by using a common use power, has a power backup function and a function for checking a power failure, a power backup battery discharge and DC input break down. A control unit(13) controls the system wholly and functions an initialization of each device, a performance supervision, and a fault processing.

Abstract translation: 目的：用于音频和宽带数据服务的光网络单元被设置用于采用能够发送服务数据，诸如视频点播，数字CATV，高图像质量等的电话会议宪法IEEE 1394接口：一种媒体连接单元（2）是 连接到OLT（Optical Line Termination，光线路终端）与ATM网络之间的手动分光器构成的ODN（Optical Distribution Network，光分配网络），通过单条光线路作为星型拓扑类型。 物理层单元（3）对P / S转换，时钟恢复和S / P转换以及PON从属功能进行充电。 ATM层单元（4）接收从物理层单元（3）提供的ATM信元流，并检查该信元流是否连接，并通过VPI / VCI正常设置到系统内部作为连接鉴别字段。 AAL1（ATM适配层1）功能单元（6）具有用于提供实时服务的定时信息和与时钟相关的功能，并与E1 / POTS用户接口单元（8）接口。 AAL5功能单元（7）与以太网接口单元（9）和IEEE 1394接口单元（10）接口。 电源装置（12）由通用电源独立构成，具有电源备份功能和用于检查电源故障，备用电池放电和DC输入故障的功能。 控制单元（13）完全控制系统并且起到每个设备的初始化，性能监控和故障处理的作用。