公开(公告)号：US20160308605A1

公开(公告)日：2016-10-20

申请号：US15099157

申请日：2016-04-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hun Sik KANG ,  Jong Hyun LEE ,  Jyung Chan LEE ,  Seung IL MYONG

IPC: H04B10/077 ,  H04B1/00 ,  H04B10/50 ,  H04B10/67 ,  H04B10/25

CPC classification number: H04B10/071

Abstract: An apparatus and method for driving an optical source for an optical fiber link monitoring apparatus. The apparatus for driving an optical source for an optical fiber link monitoring apparatus includes a laser part configured to output probe light that corresponds to a bipolar code probe signal; an optical receiver configured to convert reflected light, which has travelled back from an optical fiber link after transmission of the bipolar probe light, into an electrical signal; and a direct-current (DC) canceller configured to remove a DC offset component from the electrical signal generated by the optical receiver.

Abstract translation: 一种用于驱动光纤链路监视装置的光源的装置和方法。 用于驱动光纤链路监视装置的光源的装置包括被配置为输出对应于双极码探测信号的探测光的激光部分; 光接收器，被配置为将在双极探测光传输之后从光纤链路返回的反射光转换成电信号; 以及直流（DC）消除器，被配置为从由光接收器产生的电信号中去除DC偏移分量。

公开(公告)号：US20160285553A1

公开(公告)日：2016-09-29

申请号：US15079714

申请日：2016-03-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung Hyun CHO ,  Jong Hyun LEE ,  Hwan Seok CHUNG ,  Chan Gyo HAN

IPC: H04B10/2575

CPC classification number: H04B10/25753 ,  H04B10/25759

Abstract: An apparatus for transmitting a control signal in a radio-over-fiber (RoF)-based mobile fronthaul includes: a data channel transmitter configured to generate a data signal at a preassigned frequency or wavelength; a control channel transmitter configured to generate a control signal at a designated frequency or wavelength that is shared with other apparatuses; and a combiner configured to combine the data signal with the control signal.

Abstract translation: 一种用于在基于光纤无线（RoF）的移动前端中发送控制信号的装置包括：数据信道发射机，被配置为以预分配的频率或波长生成数据信号; 控制信道发射机，被配置为产生与其他设备共享的指定频率或波长的控制信号; 以及组合器，被配置为将数据信号与控制信号组合。

公开(公告)号：US20160233956A1

公开(公告)日：2016-08-11

申请号：US15015628

申请日：2016-02-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hun Sik KANG ,  Jong Hyun LEE ,  Jyung Chan LEE ,  Seung Il MYONG

IPC: H04B10/079 ,  H03G3/30

CPC classification number: H03G3/3084 ,  H04B10/071

Abstract: An optical fiber link monitoring apparatus for detecting a failure in an optical fiber link by analyzing a trace of a received signal that has been transmitted to and reflected from said optical fiber link. The optical fiber link monitoring apparatus includes a variable gain amplifier (VGA), an analog/digital converter (ADC), and a controller. The VGA amplifies a gain of the received signal, for which the ADC converts the gain-amplified signal into a digital signal. The controller then analyzes a digital signal trace and adjusts the gain of the VGA according to the analysis result.

Abstract translation: 一种光纤链路监视装置，用于通过分析已经发送到所述光纤链路并从所述光纤链路反射的接收信号的轨迹来检测光纤链路中的故障。 光纤链路监视装置包括可变增益放大器（VGA），模拟/数字转换器（ADC）和控制器。 VGA放大接收信号的增益，ADC将增益放大信号转换为数字信号。 然后控制器分析数字信号迹线，并根据分析结果调整VGA的增益。

公开(公告)号：US20150124626A1

公开(公告)日：2015-05-07

申请号：US14533450

申请日：2014-11-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Dong Myung SUL ,  Sun Me KIM ,  Jong Hyun LEE

IPC: H04L12/26 ,  H04L29/06 ,  H04L12/911 ,  H04L12/723

CPC classification number: H04L47/825 ,  H04L12/4633 ,  H04L43/0811 ,  H04L43/10 ,  H04L45/50 ,  H04L69/22

Abstract: A method of supporting in-band Operations, Administration and Maintenance (OAM) in a Multi-Protocol Label Switching-Transport Profile (MPLS-TP) network is provided. The method may include generating a merged OAM packet by merging a plurality of OAM packets received from a plurality of leaf nodes, and transmitting the merged OAM packet to a root node through a Label-Switched Path (LSP).

Abstract translation: 提供了一种在多协议标签交换传输模式（MPLS-TP）网络中支持带内操作，管理和维护（OAM）的方法。 该方法可以包括通过合并从多个叶节点接收的多个OAM分组来生成合并的OAM分组，并且通过标签交换路径（LSP）将合并的OAM分组发送到根节点。

公开(公告)号：US20140153928A1

公开(公告)日：2014-06-05

申请号：US14096650

申请日：2013-12-04

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jea Hoon YU ,  Seung-Hyun CHO ,  Tae Il KIM ,  Jeong-Dong RYOO ,  Tae Whan YOO ,  Bheom Soon JOO ,  Jong Hyun LEE ,  Bong Tae KIM

IPC: H04B10/11

CPC classification number: H04B10/1129

Abstract: In a wireless optical communication system in which communication is performed based on a free space and a plurality of the communication apparatuses are arranged in a ring form around a central office terminal (COT), the communication apparatus monitors optical signals received in a first direction or in a second direction opposite to the first direction, and selects a first path through which the optical signals in the first direction are received and a second path through which the optical signals in the second direction are received. The communication apparatus converts an optical signal having a predetermined unique wavelength from among the optical signals received through the selected path into a signal of a frequency domain having a plurality of subcarriers, and obtains packet data mapped to each of the subcarriers.

Abstract translation: 在基于自由空间进行通信并且多个通信装置以环形方式布置在中心局终端（COT）周围的无线光通信系统中，通信装置监视沿第一方向接收的光信号， 在与第一方向相反的第二方向上，选择接收第一方向的光信号的第一路径和接收第二方向的光信号的第二路径。 通信装置将从所选择的路径接收的光信号中具有预定唯一波长的光信号转换为具有多个子载波的频域的信号，并获得映射到每个副载波的分组数据。

公开(公告)号：US20130170837A1

公开(公告)日：2013-07-04

申请号：US13729638

申请日：2012-12-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kwang Ok KIM ,  Seung-Hyun CHO ,  Jie Hyun LEE ,  Seung Il MYONG ,  Sang Soo LEE ,  Jong Hyun LEE

IPC: H04J14/08

CPC classification number: H04J14/08 ,  H04Q11/0005 ,  H04Q2011/0064

Abstract: A converged passive optical network (CPON) and a data transmission method are disclosed. The CPON is a combination of a time division multiple access-passive optical network (TDMA-PON) and an orthogonal frequency division multiple access-passive optical network (OFDMA-PON) and is able to dynamically controlling a bandwidth for upstream signal transmission through allocation of multiple subcarriers to each single optical network unit (ONU).

Abstract translation: 公开了一种融合无源光网络（CPON）和数据传输方法。 CPON是时分多址无源光网络（TDMA-PON）和正交频分多址无源光网络（OFDMA-PON）的组合，能够通过分配动态地控制上行信号传输的带宽 的多个子载波到每个单个光网络单元（ONU）。

公开(公告)号：US20130170830A1

公开(公告)日：2013-07-04

申请号：US13729521

申请日：2012-12-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Hyun CHO ,  Jie Hyun LEE ,  Kwang Ok KIM ,  Eui Suk JUNG ,  Seung Il MYONG ,  Sang Soo LEE ,  Jong Hyun LEE

IPC: H04B10/27

CPC classification number: H04B10/27 ,  H04B10/272 ,  H04B10/564 ,  H04B17/103 ,  H04B17/15

Abstract: A modulation method of an optical modem and a signal transmission apparatus performing the method are disclosed. The modulation method of the optical modem includes an optical interface providing a signal to a light source, a photo detector receiving reflected light by an optical link when output light from the light source based on the provided signal is reflected by the optical link, the photo detector measuring and determining characteristics of the optical link using the reflected light, and the optical modem determining a power level and a modulation method for each subcarrier based on the characteristics of the optical link.

Abstract translation: 公开了一种光调制解调器的调制方法和执行该方法的信号传输装置。 光调制解调器的调制方法包括向光源提供信号的光接口，当基于提供的信号的来自光源的输出光被光链路反射时，光接收器接收由光链路反射的光的光检测器，照片 检测器使用反射光测量和确定光链路的特性，并且光调制解调器基于光链路的特性确定每个子载波的功率电平和调制方法。

公开(公告)号：US20130170375A1

公开(公告)日：2013-07-04

申请号：US13729582

申请日：2012-12-28

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kwang Ok KIM ,  Seung Il MYONG ,  Sang Soo LEE ,  Jong Hyun LEE

IPC: H04W88/06

CPC classification number: H04W88/06 ,  H04L5/0091 ,  H04L27/2602

Abstract: A wired/wireless converged media access control (MAC) adaptor and a method for transmitting a frame using the same. The wired/wireless converged MAC adaptor may include a service network interface (SNI) to transmit a MAC frame corresponding to a wired or wireless service, or common public radio interface (CPRI) data, a frame conversion unit to convert, into an orthogonal frequency division multiplexing (OFDM) frame, a wired/wireless converged MAC frame having a common frame structure of the MAC frame corresponding to the wired or wireless service or the CPRI data, and an OFDM interface configured to transmit the OFDM frame to an optical OFDM modem by dynamically allocating sub-carriers based on data transmission characteristics.

Abstract translation: 有线/无线融合媒体访问控制（MAC）适配器以及使用该适配器发送帧的方法。 有线/无线融合MAC适配器可以包括用于发送对应于有线或无线服务的MAC帧的服务网络接口（SNI）或公共无线电接口（CPRI）数据，将转换成正交频率的帧转换单元 分割复用（OFDM）帧，具有与有线或无线服务或CPRI数据相对应的MAC帧的公共帧结构的有线/无线融合MAC帧以及被配置为将OFDM帧发送到光OFDM调制解调器的OFDM接口 通过基于数据传输特性动态分配子载波。

公开(公告)号：US20220021455A1

公开(公告)日：2022-01-20

申请号：US17374466

申请日：2021-07-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joonyoung KIM ,  Eon-sang KIM ,  Minkyu SUNG ,  Jong Hyun LEE ,  Seung-Hyun CHO

IPC: H04B10/2575 ,  H04B10/50

Abstract: Disclosed is a radio-frequency-over-fiber (RFoF) transmission method using a directly modulated laser (DML). The RFoF transmission method to be performed by a head end includes combining a radio frequency (RF) carrier signal and a data signal having a lower frequency band than the RF carrier signal through an RF coupler, modulating the combined RF carrier signal and the combined data signal using a frequency response characteristic of a DML, and outputting an optical signal in which, of RF carrier signals and data signals being generated in a laterally symmetrical form based on an optical carrier frequency through the modulating, an RF carrier signal is suppressed.

公开(公告)号：US20180152244A1

公开(公告)日：2018-05-31

申请号：US15823823

申请日：2017-11-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung-Hyun CHO ,  Hwan Seok CHUNG ,  Minkyu SUNG ,  Jong Hyun LEE

IPC: H04B10/2575 ,  H04J14/02

CPC classification number: H04B10/25753 ,  H04B1/38 ,  H04B2210/006 ,  H04J14/02

Abstract: A host unit is provided between a remote radio head and a radio unit. The host unit performs a conversion between a digital optical signal used by the remote radio head and an analog optical signal used by the radio unit. A frequency of the analog optical signal converted by the host unit may be an intermediate frequency. The radio unit performs a conversion between an analog optical signal used by the host unit and an analog radio signal used by a user terminal. A frequency of the analog radio signal may be included in a millimeter wave band or radio frequency band.