公开(公告)号：US09553665B2

公开(公告)日：2017-01-24

申请号：US14620340

申请日：2015-02-12

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sung-Chang Kim ,  Hark Yoo ,  Geun-Yong Kim ,  Dong-Soo Lee ,  Hee-Do Kim

IPC: H04B10/08 ,  H04B10/073 ,  H04J14/02 ,  H04B10/077

CPC classification number: H04B10/073 ,  H04B10/0771 ,  H04B10/0773 ,  H04J14/02

Abstract: Disclosed herein is an apparatus and method for detecting an optical line fault in a Passive Optical Network (PON). The apparatus includes an optical distribution unit configured to, when a multiplexed signal of a downstream light signal and a monitoring light signal is input, distribute the multiplexed signal to an Optical Network Unit (ONU) of a first optical path and to a second optical path. An optical layer management unit is installed in the second optical path and is configured to set a time at which the monitoring light signal of the multiplexed signal provided to the second optical path is received to a starting time of monitoring light measurement, compare a monitoring light signal reflected and returned from the ONU with a signal pattern obtained when no fault occurs, and then determine whether a fault has occurred in a distribution network.

Abstract translation: 本文公开了一种用于检测无源光网络（PON）中的光线路故障的装置和方法。 该装置包括：光分配单元，被配置为当下行光信号和监视光信号的复用信号被输入时，将复用的信号分配到第一光路的光网络单元（ONU）和第二光路 。 光层管理单元安装在第二光路中，并且被配置为设置接收到提供给第二光路的复用信号的监视光信号到监视光测量的开始时间的时间，比较监视光 在没有发生故障的情况下用ONU获得的信号从ONU反射并返回，然后确定配电网络中是否发生故障。

公开(公告)号：US09883335B2

公开(公告)日：2018-01-30

申请号：US15006530

申请日：2016-01-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung-Chang Kim ,  Geun-Yong Kim ,  Jae-In Kim ,  Hark Yoo ,  Dong-Soo Lee

IPC: H04B17/00 ,  H04W4/02

CPC classification number: H04W4/02

Abstract: Disclosed herein are a handheld device and method for measuring the quality of an optical link, which are capable of simultaneously measuring the strength of an optical signal and the quality of an optical link at an optical network terminal in a Fiber-to-the-Home (FTTH) network. A presented handheld device for measuring a quality of an optical link includes an optical signal input port for receiving an optical signal, an optical power measurement unit for measuring a power of the optical signal, an output unit for outputting one or more of a measured power value of the optical signal and results of quality measurement of an optical link, based on interworking with an optical network terminal, and a control unit for storing the measured power value of the optical signal and performing a process for quality measurement of the optical link.

公开(公告)号：US09197353B2

公开(公告)日：2015-11-24

申请号：US14038420

申请日：2013-09-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： Dong-Soo Lee ,  Sung-Chang Kim ,  Geun-Yong Kim ,  Hark Yoo ,  Young-Suk Lee

IPC: H04J14/02

CPC classification number: H04J14/025 ,  H04J14/0252

Abstract: Provided is an OLT including a wavelength splitter that splits all upstream optical signals with different wavelengths received from at least one ONU according to wavelength, at least one receiver that receive the optical signals split by the wavelength splitter according to wavelength, a wavelength selector that allocates an upstream transmission wavelength of the at least one ONU, and a transmitter that transmits wavelength allocation information allocated by the wavelength selector to the at least one ONU.

Abstract translation: 提供了一种OLT，其包括波长分离器，其根据波长分离从至少一个ONU接收的不同波长的所有上游光信号，至少一个接收器，其根据波长接收由波长分离器分离的光信号;波长选择器，其分配 所述至少一个ONU的上行传输波长，以及将由所述波长选择器分配的波长分配信息发送到所述至少一个ONU的发射机。