公开(公告)号：US20140199074A1

公开(公告)日：2014-07-17

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: H04B10/27 ,  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：US20170155463A1

公开(公告)日：2017-06-01

申请号：US15431533

申请日：2017-02-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Han-Hyub LEE ,  Jie-Hyun LEE ,  Eon-Sang KIM ,  Sang-Soo LEE

IPC: H04J14/02 ,  H04B10/079

CPC classification number: H04J14/0242 ,  H04B10/0795 ,  H04B10/2587 ,  H04J14/02 ,  H04J2014/0253

Abstract: A wavelength-division multiplexing optical communication system and a method for measuring optical performance of an output signal for the system. The optical communication system includes: a service-provider device; a local node; and a plurality of subscriber devices. The service-provider device includes: a plurality of first optical transceivers; a first optical multiplexer/demultiplexer (OD/OM) connected to the plurality of first optical transceivers; and a seed-light source providing seed light. Each subscriber device includes a second optical transceiver. The local node connects the service-provider device and the plurality of subscriber devices to each other using aDWDM link comprising: a second multiplexer/demultiplexer (OD/OM); and a single-mode optical fiber for transmission. Here, the optical intensity of an output signal of the second optical transceiver is determined by compensating for the value of the loss caused when the output signal passes through the second OD/OM of the local node.

公开(公告)号：US20140219659A1

公开(公告)日：2014-08-07

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: H04L27/26

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：US20160226618A1

公开(公告)日：2016-08-04

申请号：US14261041

申请日：2014-04-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jie-Hyun LEE ,  Kyeong-Hwan DOO ,  Sil-Gu MUN ,  Han-Hyub LEE

IPC: H04J14/02 ,  H04J14/08 ,  H04B10/572 ,  H04B10/27

CPC classification number: H04B10/572 ,  H04J14/0282

Abstract: A controlling method for mitigating a rogue behavior of an Optical Network Unit (ONU) having a wavelength-tunable function in a hybrid Passive Optical Network (PON) system. The controlling method includes determining whether a first wavelength for an upstream signal received from the ONU strays away from an allowable range for a second wavelength assigned to the ONU, and, in response to a determination that the first wavelength strays away from the allowable range for the second wavelength, transmitting an upstream wavelength adjustment request message to the ONU to adjust a wavelength for the upstream signal. At this point, a determination on whether the first wavelength strays away from the allowable range for the second wavelength is made by calculating wavelength drift of the first wavelength and determining whether the calculated wavelength drift is greater than a drift threshold.

Abstract translation: 一种用于减轻混合无源光网络（PON）系统中具有波长可调功能的光网络单元（ONU）的流氓行为的控制方法。 控制方法包括：确定从ONU接收到的上行信号的第一波长是否偏离分配给ONU的第二波长的允许范围，并且响应于第一波长偏离允许范围的确定， 第二波长，向ONU发送上行波长调整请求消息以调整上行信号的波长。 此时，通过计算第一波长的波长漂移并确定所计算的波长漂移是否大于漂移阈值来确定第一波长是否偏离第二波长的允许范围。

公开(公告)号：US20140219661A1

公开(公告)日：2014-08-07

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: H04J14/02 ,  H04L7/00

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。

公开(公告)号：US20130302029A1

公开(公告)日：2013-11-14

申请号：US13866647

申请日：2013-04-19

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jie-Hyun LEE ,  Seung-Il MYONG ,  Han-Hyub LEE ,  Sang-Soo LEE

IPC: H04B10/07

CPC classification number: H04B10/07 ,  H04B10/07957 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0256 ,  H04J14/0257 ,  H04J14/0258

Abstract: A wavelength tuning time measurement apparatus and method for a multi-wavelength passive optical network (MW PON) are provided. The wavelength tuning time measurement apparatus for measuring a wavelength tuning time of a wavelength-variable light source included in the MW PON system includes an optical filter configured to pass only light of a certain wavelength bandwidth and a photo detector configured to sense light passing through the optical filter. The wavelength tuning time is a time taken from a time when a wavelength change signal is transferred to the wavelength-variable light source, to a time when light starts to be successively sensed by the photo detector.

Abstract translation: 提供了一种用于多波长无源光网络（MW PON）的波长调谐时间测量装置和方法。 用于测量MW PON系统中包括的波长可变光源的波长调谐时间的波长调谐时间测量装置包括被配置为仅通过一定波长带宽的光的光学滤波器和被配置为感测通过 滤光片 波长调谐时间是从波长变化信号传输到波长可变光源的时间到光开始被光电检测器连续感测的时间。