公开(公告)号：US09191116B2

公开(公告)日：2015-11-17

申请号：US14050465

申请日：2013-10-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung-Hyun Cho ,  Seung-Il Myong ,  Kyeong-Hwan Doo ,  Jie-Hyun Lee ,  Sang-Soo Lee ,  Jong-Hyun Lee

IPC: H04J14/02 ,  H04B10/27 ,  H04B10/548 ,  H04L27/26

CPC classification number: H04B10/27 ,  H04B10/548 ,  H04L27/2649 ,  H04L27/2697

Abstract: An orthogonal frequency division multiple access-passive optical network including a plurality of optical network units each configured to generate orthogonal frequency division multiplexed signals, which are allocated thereto, based on a central frequency for frequency division multiplexing that is allocated in advance, and to use the generated signals in upstream transmission.

Abstract translation: 一种正交频分多址无源光网络，包括多个光网络单元，每个光网络单元被配置为基于预先分配的用于频分复用的中心频率而分配给它们的正交频分复用信号，并且使用 在上行传输中产生的信号。

公开(公告)号：US09136941B2

公开(公告)日：2015-09-15

申请号：US13838309

申请日：2013-03-15

Applicant: Electronics and Telecommunications Research Institute

Inventor： Han-Hyub Lee ,  Seung-Il Myong ,  Eui-Suk Jung ,  Sang-Soo Lee

IPC: H04B10/08 ,  H04B10/071

CPC classification number: H04B10/071

Abstract: An optical layer monitoring apparatus and method thereof are provided. According to an embodiment of the present invention, an optical layer monitoring apparatus including an optical time domain reflectometer (OTDR) function so as to monitor an optical path of a passive optical network (PON), and a method for improving accuracy of measured monitoring results using the optical layer monitoring apparatus are provided. Therefore, it is possible to enable a user to continuously detect distortion or attenuation along the optical path, and to quickly recover from the distortion or attenuation along the optical path when distortion or attenuation is detected.

Abstract translation: 提供了一种光学层监测装置及其方法。 根据本发明的实施例，包括光时域反射计（OTDR）功能以监视无源光网络（PON）的光路的光层监视装置以及用于提高测量监视结果精度的方法 提供了使用光学层监视装置。 因此，可以使用户能够连续地检测沿着光路的失真或衰减，并且当检测到失真或衰减时，可以沿着光路的失真或衰减快速恢复。

公开(公告)号：US09225570B2

公开(公告)日：2015-12-29

申请号：US14082902

申请日：2013-11-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kyeong-Hwan Doo ,  Hak-Jeon Bang ,  Seung-Il Myong ,  Seung-Hyun Cho ,  Jie-Hyun Lee

IPC: H04J14/02 ,  H04L27/26 ,  H04L5/00 ,  H04Q11/00

CPC classification number: H04L27/2608 ,  H04L5/0039 ,  H04L5/0053 ,  H04L5/0064 ,  H04L27/2697 ,  H04Q11/0067

Abstract: There are provided a method of allocating upstream bandwidth resources and a method of transmitting upstream data in an orthogonal frequency division multiple access-open optical subscriber network. The method of allocating an upstream bandwidth resource according to an embodiment of the invention includes receiving queue status information from each optical network unit (ONU), and allocating an upstream bandwidth by providing to each ONU a 2-D upstream bandwidth map on a subcarrier-time resource through a frame synchronized at constant cycles, based on the queue status information received from each ONU.

Abstract translation: 提供了一种分配上行带宽资源的方法和在正交频分多址接入开放光用户网络中发送上行数据的方法。 根据本发明实施例的分配上行带宽资源的方法包括从每个光网络单元（ONU）接收队列状态信息，并且通过向每个ONU提供子载波上的带宽映射的分配上行带宽， 基于从每个ONU接收的队列状态信息，通过以恒定周期同步的帧的时间资源。

公开(公告)号：US09197351B2

公开(公告)日：2015-11-24

申请号：US14082796

申请日：2013-11-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Kyeong-Hwan Doo ,  Seung-Il Myong ,  Han-Hyub Lee ,  Seung-Hyun Cho ,  Jie-Hyun Lee ,  Sang-Soo Lee

IPC: H04B10/50 ,  H04B10/60 ,  H04B10/2587 ,  H04J3/16 ,  H04J14/02

CPC classification number: H04J14/0227 ,  H04J3/1694 ,  H04J14/0246 ,  H04J14/025

Abstract: Provided is a method of selecting a wavelength of an optical network unit including selecting a pre-loaded default wavelength as an available wavelength candidate or the wavelength that has been changed when a preset wavelength changing condition is satisfied as the available wavelength candidate, acquiring frame synchronization for a downstream signal having the same wavelength as the selected available wavelength candidate, and transmitting a registration request message to an optical line terminal (OLT) from which the downstream signal has been transmitted when the frame synchronization is acquired, assigning the available wavelength candidate to an available wavelength used for communication with the OLT and registering the terminal in the OLT when a registration allowance message is received from the OLT.

Abstract translation: 提供了一种选择光网络单元的波长的方法，包括选择预先加载的默认波长作为可用波长候选，或当满足预设波长变化条件时已经改变的波长作为可用波长候选，获取帧同步 对于与选择的可用波长候选具有相同波长的下行信号，并且当获取帧同步时，向已经发送了下行信号的光线路终端（OLT）发送注册请求消息，将可用波长候选分配给 用于与OLT通信的可用波长，并且当从OLT接收到注册允许消息时，在OLT中注册终端。