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：US20140161446A1

公开(公告)日：2014-06-12

申请号：US14092297

申请日：2013-11-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Han-Hyub LEE ,  Sang-Soo LEE

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

CPC classification number: H04J14/0221 ,  H04B10/0777 ,  H04B10/272 ,  H04B10/2914 ,  H04B10/2939 ,  H04J14/0246 ,  H04J14/0282 ,  H04J14/08

Abstract: The TWDM-PON system includes a service provider equipment configured to comprise a plurality of Optical Line Terminals (OLTs), wherein each OLT provides a service in a TWDM scheme; a subscriber equipment configured to comprise a plurality of an Optical Network Units (ONUs), wherein each of the plurality of ONUs utilizes a service provided from one of the plurality of OLTs using an optical signal of an arbitrary wavelength; an Optical Division Network (ODN) configured to transmit multi-wavelength downstream optical signals and multi-wavelength upstream optical signals; and a Reach Extender (RE) configured to comprise at least one of a downstream optical amplifier and an upstream optical amplifier, wherein the downstream optical amplifier is configured to amplify the multi-wavelength optical signals simultaneously, and the upstream optical amplifier is configured to amplify the multi-wavelength optical signals simultaneously.

Abstract translation: TWDM-PON系统包括被配置为包括多个光线路终端（OLT）的服务提供商设备，其中每个OLT以TWDM方案提供服务; 配置为包括多个光网络单元（ONU）的用户设备，其中所述多个ONU中的每一个使用使用任意波长的光信号从所述多个OLT中的一个OLT提供的服务; 配置为发送多波长下行光信号和多波长上行光信号的光分网络（ODN）; 以及配置为包括下游光放大器和上游光放大器中的至少一个的接近扩展器（RE），其中所述下游光放大器被配置为同时放大所述多波长光信号，并且所述上游光放大器被配置为放大 多波长光信号同时进行。

公开(公告)号：US20130294768A1

公开(公告)日：2013-11-07

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: H04B10/071

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：US20140233954A1

公开(公告)日：2014-08-21

申请号：US14186755

申请日：2014-02-21

Applicant: Electronics and Telecommunications Research Institute

Inventor： Han-Hyub LEE ,  Eun-Gu LEE ,  Sang-Soo LEE

IPC: H04J14/02 ,  H04B10/272

CPC classification number: H04J14/025 ,  H04J14/0246 ,  H04J14/0273

Abstract: Provided is a method of establishing a link between service provider equipment and subscriber equipment in a multi-wavelength passive optical network system. The method of establishing a link includes acquiring information about a wavelength plan of allocated wavelengths in the MW PON system; transmitting a first signal wavelength initialization request signal on a first upstream wavelength from physical layer to the service provider equipment; waiting for a response from the service provider equipment for a predetermined time interval after transmitting the first signal wavelength initialization request signal; and in response to failing to receive a response to the first signal-wavelength initialization request signal within the predetermined time interval, transmitting a second signal wavelength initialization request signal on a second upstream wavelength to the service provider equipment after the waiting.

Abstract translation: 提供了一种在多波长无源光网络系统中建立服务提供商设备和用户设备之间的链路的方法。 建立链路的方法包括获取关于MW PON系统中分配的波长的波长计划的信息; 将第一上行波长的第一信号波长初始化请求信号从物理层传送到服务提供商设备; 在发送第一信号波长初始化请求信号之后，等待来自服务提供商设备的预定时间间隔的响应; 并且响应于在所述预定时间间隔内未能接收到对所述第一信号波长初始化请求信号的响应，在所述等待之后向所述服务提供商设备发送第二上行波长的第二信号波长初始化请求信号。

公开(公告)号：US20140161461A1

公开(公告)日：2014-06-12

申请号：US14092260

申请日：2013-11-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Han-Hyub LEE ,  Sang-Soo LEE

IPC: H04J14/02

CPC classification number: H04J3/0682 ,  H04J14/0226 ,  H04J14/0238 ,  H04J14/0282

Abstract: A Time Wavelength Division Multiplexing-Passive Optical Network (TWDM-PON) system and a communication link method thereof are provided. The communication link method is a method whereby an Optical Network Unit (ONU) which has established communication link to one Optical Line Terminal (OLT) establishes communication link to a different OLT. The ONU receives a wavelength change instruction to change a wavelength thereof to an operating wavelength assigned to the different OLT, and change the wavelength in response to the wavelength change instruction to synchronize to a downstream signal of the operating signal. In addition, the ONU receives an upstream discovery grant signal from the different OLT, and transmits an acknowledgement message to notify the receipt of the upstream discovery grant signal, so that the ONU establishes communication link to the different OLT.

Abstract translation: 提供了时间波分复用无源光网络（TWDM-PON）系统及其通信链路方法。 通信链路方法是建立与一个光线路终端（OLT）的通信链路的光网络单元（ONU）建立到不同OLT的通信链路的方法。 ONU接收波长改变指令，将其波长改变为分配给不同OLT的工作波长，并且响应于波长改变指令改变波长以与操作信号的下行信号同步。 此外，ONU从不同的OLT接收到上游发现许可信号，并且发送确认消息以通知上游发现许可信号的接收，使得ONU建立到不同OLT的通信链路。

公开(公告)号：US20140153933A1

公开(公告)日：2014-06-05

申请号：US14094113

申请日：2013-12-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Eun-Gu LEE ,  Eui-Suk JUNG ,  Sil-Gu MUN ,  Han-Hyub LEE ,  Jyung-Chan LEE ,  Sang-Soo LEE ,  Jong-Hyun LEE

IPC: H04B10/50

CPC classification number: H01S5/02272 ,  H01S5/0212 ,  H01S5/02212 ,  H01S5/02276 ,  H01S5/02415 ,  H01S5/0261 ,  H01S5/0425 ,  H01S5/06804 ,  H01S5/4025

Abstract: A multi-channel transmitter optical sub-assembly (TOSA) is provided. The multi-channel TOSA includes a stem including a sub-mount, a plurality of light sources mounted on the sub-mount, a common ground pad disposed at the sub-mount and connected to ground electrodes of the light sources in common, a common lead pin installed at the stem, and connected to the common ground pad, and a thermistor mounted on the sub-mount along with the light sources.

Abstract translation: 提供多通道发射机光学子组件（TOSA）。 多通道TOSA包括一个杆，它包括一个副安装座，多个安装在子座上的光源，一个共同的接地焊盘，设置在子座上并共同连接到光源的接地电极，一个共同的 引脚安装在杆上，并连接到公共接地垫，以及与光源一起安装在子安装座上的热敏电阻。

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。