公开(公告)号：US20180131436A1

公开(公告)日：2018-05-10

申请号：US15805236

申请日：2017-11-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Byung-Hee SON ,  Geun Yong KIM ,  Jae In KIM ,  Hee Do KIM ,  Moon Kyun OH ,  Hark YOO ,  Dongsoo LEE

IPC: H04B10/071 ,  H04B10/079 ,  H04B10/27

CPC classification number: H04B10/071 ,  H04B10/0779 ,  H04B10/0791 ,  H04B10/0793 ,  H04B10/07955 ,  H04B10/27

Abstract: A terminal status monitoring apparatus connected to a terminal at an optical subscriber side in an optical network is provided. A signal transferring unit transfers a downlink optical signal to the terminal and receives, as a reflected optical signal, the downlink optical signal which is reflected at the terminal. A signal receiving unit measures an intensity of the reflected optical signal. A signal processing unit determines a connection status of a terminal device at the terminal by comparing an intensity of the downlink optical signal with the intensity of the reflected optical signal. A signal output unit outputs the connection status.

公开(公告)号：US20180006726A1

公开(公告)日：2018-01-04

申请号：US15638104

申请日：2017-06-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae In KIM ,  Geun Yong KIM ,  Hee Do KIM ,  Byung Hee SON ,  Moon Kyun OH ,  Hark YOO ,  Dong Soo LEE ,  Hyun Seo KANG ,  Gi Ha YOON

IPC: H04B10/27 ,  G02B6/42 ,  H04B10/079

CPC classification number: H04B10/27 ,  G02B6/3825 ,  G02B6/3895 ,  G02B6/428 ,  G02B6/4298 ,  H04B10/07955 ,  H04B10/2504

Abstract: Provided is an optical distribution network (ODN) including an optical cable and an optical node, and more particularly, an optical distribution network including an optical cable and an optical node, wherein the optical node is implemented to acquire and analyze information regarding the optical cable through an optical connector included in the optical cable, and an operating method thereof. The ODN includes an optical cable and an optical node connectable to the optical cable, wherein the optical cable has an optical connector capable of being joined to the optical node, and the optical connector has an electronic tag configured to store identification information of the optical cable and a first connection pin configured to electrically connect the electronic tag and the optical node.

公开(公告)号：US20170111119A1

公开(公告)日：2017-04-20

申请号：US15392334

申请日：2016-12-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hark YOO ,  Dong Soo LEE ,  Geun Yong KIM ,  Sung Chang KIM ,  Hee Do KIM ,  Jae In KIM

IPC: H04B10/564 ,  H04B10/079 ,  H04J14/02 ,  H04J14/08

CPC classification number: H04B10/564 ,  H04B10/07953 ,  H04B10/07955 ,  H04J14/0221 ,  H04J14/0267 ,  H04J14/0282 ,  H04J14/08

Abstract: Disclosed are a method and system for determining and controlling power of an optical transmitter of an optical network unit (ONU) for a time and wavelength division multiplexing passive optical network (TWDM-PON). The system includes an RSSI collector configured to collect received signal strength indication (RSSI) information from upstream optical signals received from the ONUs connected to optical line terminal (OLT) ports, an ONU power level determiner configured to gather the pieces of RSSI information about the ONUs from the RSSI collector, and to determine power of optical transmitters of the ONUs based on the gathered information, and a power mode controller configured to receive power mode setting information of the optical transmitters of the ONUs from the ONU power level determiner, and to generate a physical layer operation and maintenance (PLOAM) message to control power modes of the ONUs based on the received power mode setting information.

公开(公告)号：US20150326346A1

公开(公告)日：2015-11-12

申请号：US14316867

申请日：2014-06-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hark YOO ,  Dong Soo LEE ,  Hee Do KIM

IPC: H04L1/00 ,  H04Q11/00

CPC classification number: H03M13/353 ,  H03M13/1515 ,  H04B10/272 ,  H04L1/0027 ,  H04L1/0075 ,  H04Q11/0067 ,  H04Q2011/0033 ,  H04Q2011/0045 ,  H04Q2011/0083

Abstract: Provided are a system and method for setting a downstream forward error correction code for a downstream frame which is transmitted from an optical line terminal to an optical network unit in a time division multiplexing passive optical network. A system for setting a downstream forward error correction code in a time division multiplexing passive optical network includes: an optical line terminal configured to change a downstream forward error correction (FEC) indication included in a downstream frame and set a downstream FEC indication counter included in the downstream frame to transmit the downstream frame; and an optical network unit configured to receive the downstream frame from the optical line terminal and synchronize an FEC setting of the optical network unit with the FEC setting of the optical line terminal as a result of detection of the downstream FEC indication and downstream FEC indication counter included in the downstream frame.

Abstract translation: 提供一种用于设置在时分复用无源光网络中从光线路终端发送到光网络单元的下行帧的下行前向纠错码的系统和方法。 一种用于在时分复用无源光网络中设置下行前向纠错码的系统包括：光线路终端，被配置为改变包括在下游帧中的下行前向纠错（FEC）指示，并且设置包括在下行帧中的下行FEC指示计数器 下游帧传输下游帧; 以及光网络单元，其被配置为从所述光线路终端接收所述下行帧，并且作为所述下行FEC指示和下游FEC指示计数器的检测结果，使所述光网络单元的FEC设置与所述光线路终端的FEC设置同步 包含在下游框架中。