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    CLOUD BASE STATION IN FIXED-MOBILE CONVERGED ACCESS NETWORK AND OPERATION METHOD THEREOF
    1.
    发明申请
    CLOUD BASE STATION IN FIXED-MOBILE CONVERGED ACCESS NETWORK AND OPERATION METHOD THEREOF 审中-公开
    固定移动通信接入网络中的云台基站及其操作方法

    公开(公告)号：US20140003819A1

    公开(公告)日：2014-01-02

    申请号：US13930320

    申请日：2013-06-28

    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: H04W72/04

    CPC classification number: H04W72/04 ,  H04L5/0007 ,  H04L5/0028 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2602 ,  H04L27/265 ,  H04L27/2655 ,  H04L27/2697 ,  H04L27/3405 ,  H04L27/3455

    Abstract: Disclosed is a cloud base station in an orthogonal frequency division multiplexing (OFDM)-based fixed-mobile converged access network and an operation method thereof. The cloud base station may include a physical (PHY) layer unit to perform a quadrature amplitude modulation (QAM) of a parallel signal received from a media access control (MAC) layer per subcarrier, and an optical orthogonal frequency division multiplexing (OFDM) transceiver to transform the QAM modulated subcarriers into a time domain to generate an OFDM sample per subcarrier, add a cyclic prefix (CP) and control information to for operating an enhanced radio unit (eRU) to the OFDM sample per subcarrier to generate a downstream signal, and transmit the downstream signal.

    Abstract translation: 公开了一种基于正交频分复用（OFDM）的固定移动融合接入网络中的云基站及其操作方法。 云基站可以包括用于执行从每个子载波的媒体访问控制（MAC）层接收的并行信号的正交幅度调制（QAM）的物理（PHY）层单元，以及光学正交频分复用（OFDM）收发器 将QAM调制的子载波变换成时域以产生每个子载波的OFDM样本，添加循环前缀（CP）和控制信息，以用于对每个子载波的OFDM样本操作增强型无线电单元（eRU）以生成下行信号， 并发送下行信号。

    Tunable optical network unit for multi-wavelength passive optical network system and operating method thereof
    3.
    发明授权
    Tunable optical network unit for multi-wavelength passive optical network system and operating method thereof 有权
    用于多波长无源光网络系统的可调光网络单元及其操作方法

    公开(公告)号：US09397778B2

    公开(公告)日：2016-07-19

    申请号：US14694224

    申请日：2015-04-23

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Jie Hyun Lee ,  Heuk Park ,  Jyung Chan Lee ,  Sang Soo Lee

    IPC: H04B10/00 ,  H04J14/02 ,  H04J14/00

    CPC classification number: H04J14/0278 ,  H04B10/272 ,  H04J14/023 ,  H04J14/0241

    Abstract: A tunable optical network unit (ONU) for a multi-wavelength passive optical network (MW PON) system and an operation method thereof are provided. The tunable ONU includes a cyclic tunable filter configured to have cyclic wavelength transmission properties that allow all wavelength channels of both a downstream signal and an upstream signal and to vary a wavelength to pass therethrough; a wavelength splitter configured to split an upstream signal wavelength band and a downstream signal wavelength band; a photodetector element configured to detect a downstream signal that is transmitted through the wavelength splitter, passing through the cyclic tunable filter which is aligned to a specific downstream signal wavelength channel; and a tunable transmitter configured to output to the wavelength transmitter an upstream signal of a wavelength channel that is determined based on an aligned downstream signal wavelength channel of the cyclic tunable filter.

    Abstract translation: 提供了一种用于多波长无源光网络（MW PON）系统的可调谐光网络单元（ONU）及其操作方法。 可调谐ONU包括循环可调滤波器，其被配置为具有允许下行信号和上行信号的所有波长信道并且使波长变化通过的循环波长传输特性; 波长分离器，被配置为分离上游信号波长带和下游信号波长带; 光检测器元件，被配置为检测通过波长分离器传输的下行信号，通过与特定下行信号波长信道对准的循环可调滤波器; 以及可调谐发射器，被配置为向所述波长发射器输出基于所述循环可调滤波器的对准的下行信号波长信道确定的波长信道的上行信号。

    OPTICAL TRANSCEIVER AND METHOD OF SETTING WAVELENGTH OF OPTICAL TRANSCEIVER
    4.
    发明申请
    OPTICAL TRANSCEIVER AND METHOD OF SETTING WAVELENGTH OF OPTICAL TRANSCEIVER 有权

    公开(公告)号：US20210273406A1

    公开(公告)日：2021-09-02

    申请号：US16907682

    申请日：2020-06-22

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Jie Hyun Lee ,  Sae-Kyoung Kang ,  Joon Ki Lee ,  Sun Hyok Chang ,  Joon Young Huh

    IPC: H01S5/06 ,  H01S5/40 ,  H01S5/0687 ,  H04B10/40 ,  H04B10/50

    Abstract: An optical transceiver and a method of setting a wavelength of the optical transceiver. The optical transceiver may include a thermoelectric cooler (TEC) configured to maintain a constant operating temperature of a transmitter optical sub-assembly (TOSA) of the optical transceiver based on an installation environment of the optical transceiver, a plurality of laser diodes arranged on the top of the TEC and configured to output optical signals having different wavelengths, an optical multiplexer configured to multiplex the optical signals having different wavelengths, output through the plurality of laser diodes, and a wavelength controller configured to control the wavelengths of the optical signals output through the plurality of laser diodes such that optical outputs of the optical signals having different wavelengths, detected through the optical multiplexer, are maximized, wherein the wavelength controller may be individually arranged in one region of each of the plurality of laser diodes.

    Optical receiver with optical demultiplexer
    5.
    发明授权
    Optical receiver with optical demultiplexer 有权

    公开(公告)号：US10447405B2

    公开(公告)日：2019-10-15

    申请号：US16023145

    申请日：2018-06-29

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Sae-Kyoung Kang ,  Joon Young Huh ,  Joon Ki Lee ,  Jie Hyun Lee

    IPC: H04B10/69 ,  H04J14/02 ,  H04B10/67

    Abstract: An optical receiver includes: an optical demultiplexer to demultiplex an optical signal in which a plurality of wavelengths is multiplexed and divide the optical signal into optical signals corresponding to the plurality of wavelengths, respectively; a reflector to change a progress direction of the divided optical signals; an optical coupling lens including, in an array form, light transmission lenses through which the divided optical signals are transmitted, respectively; a plurality of photodetectors to mount on a photodiode (PD) substrate provided on the optical coupling lens, receive the divided optical signals that are transmitted through the light transmission lenses of the optical coupling lens, respectively, and convert the received optical signals to electrical signals; and a plurality of trans impedance amplifiers provided at desired intervals to electrically connect to the plurality of photodetectors through wire bonding and amplify the received plurality of electrical signals to be a desired magnitude.

    Signal transmission apparatus and optical modem modulation method
    9.
    发明授权
    Signal transmission apparatus and optical modem modulation method 有权
    信号传输装置和光调制调制方式

    公开(公告)号：US09130675B2

    公开(公告)日：2015-09-08

    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: H04B10/272 ,  H04B10/564 ,  H04B10/27 ,  H04B17/00

    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。

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