公开(公告)号：US10951320B2

公开(公告)日：2021-03-16

申请号：US16599357

申请日：2019-10-11

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Joon Young Kim ,  Min Kyu Sung ,  Jong Hyun Lee ,  Seung Hyun Cho

IPC分类号： H04B10/50 ,  H04B7/04 ,  H04B10/2575

摘要： An apparatus for generating a broadband single-sideband signal based on a laser diode includes a first optical coupler configured to receive an optical carrier signal to divide the optical carrier signal into signals corresponding to a plurality of paths, a hybrid coupler configured to perform Hilbert transform on a radio frequency (RF) signal, a first slave laser and a second slave laser each configured to modulate optical output powers of the divided optical carrier signals by using a Hilbert-transformed RF signal, and a second optical coupler configured to receive an optical output power-modulated optical carrier signal to output a single-sideband signal.

公开(公告)号：US09935900B2

公开(公告)日：2018-04-03

申请号：US14837212

申请日：2015-08-27

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Bin Yeong Yoon ,  Tae II Kim ,  Soo Myung Park ,  Jong Hyun Lee

IPC分类号： H04L12/939 ,  H04L12/931

CPC分类号： H04L49/552 ,  H04L49/354 ,  H04L49/70

摘要： A method for providing a protection switching service in a virtual tenant network (VTN) and a controller are provided. The method enables a real-time protection switching setup on a VTN path in order to provide reliability of a VTN service.

公开(公告)号：US09137850B2

公开(公告)日：2015-09-15

申请号：US13729582

申请日：2012-12-28

申请人： Electronics and Telecommunications Research Institute

发明人： Kwang Ok Kim ,  Seung Il Myong ,  Sang Soo Lee ,  Jong Hyun Lee

IPC分类号： H04W88/06 ,  H04L27/26 ,  H04L5/00

CPC分类号： H04W88/06 ,  H04L5/0091 ,  H04L27/2602

摘要： A wired/wireless converged media access control (MAC) adaptor and a method for transmitting a frame using the same. The wired/wireless converged MAC adaptor may include a service network interface (SNI) to transmit a MAC frame corresponding to a wired or wireless service, or common public radio interface (CPRI) data, a frame conversion unit to convert, into an orthogonal frequency division multiplexing (OFDM) frame, a wired/wireless converged MAC frame having a common frame structure of the MAC frame corresponding to the wired or wireless service or the CPRI data, and an OFDM interface configured to transmit the OFDM frame to an optical OFDM modem by dynamically allocating sub-carriers based on data transmission characteristics.

摘要翻译： 有线/无线融合媒体访问控制（MAC）适配器以及使用该适配器发送帧的方法。 有线/无线融合MAC适配器可以包括用于发送对应于有线或无线服务的MAC帧的服务网络接口（SNI）或公共无线电接口（CPRI）数据，将转换成正交频率的帧转换单元 分割复用（OFDM）帧，具有与有线或无线服务或CPRI数据相对应的MAC帧的公共帧结构的有线/无线融合MAC帧以及被配置为将OFDM帧发送到光OFDM调制解调器的OFDM接口 通过基于数据传输特性动态分配子载波。

公开(公告)号：US20140003819A1

公开(公告)日：2014-01-02

申请号：US13930320

申请日：2013-06-28

申请人： Electronics and Telecommunications Research Institute

发明人： Seung Hyun Cho ,  Seung Il Myong ,  Kyeong Hwan Doo ,  Jie Hyun Lee ,  Sang Soo Lee ,  Jong Hyun Lee

IPC分类号： H04W72/04

CPC分类号： 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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US10560196B2

公开(公告)日：2020-02-11

申请号：US16197793

申请日：2018-11-21

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Joonyoung Kim ,  Minkyu Sung ,  Jong Hyun Lee ,  Seung-Hyun Cho

IPC分类号： H04B10/58 ,  H04B10/516 ,  H04B10/2575 ,  H04B10/60

摘要： A method and apparatus for adjusting a modulation index of an analog optical signal using an interference phenomenon of a coherent light, the method including dividing an analog optical signal for a first path and a second path, extracting an optical carrier from an analog optical signal divided for the first path, controlling an intensity and a phase of the optical carrier, and controlling a modulation index of the analog optical signal by combining an analog optical signal divided for the second path and the optical carrier of which the intensity and the phase are controlled.

公开(公告)号：US10090928B2

公开(公告)日：2018-10-02

申请号：US15378194

申请日：2016-12-14

申请人： Electronics and Telecommunications Research Institute

发明人： Min Kyu Sung ,  Jong Hyun Lee ,  Hwan Seok Chung ,  Seung Hyun Cho ,  Chan Gyo Han

IPC分类号： H04B10/00 ,  H04B10/2513 ,  H04B10/2575

摘要： Provided is an analog optical transmission system using a dispersion management technique. The analog optical transmission system may include a digital unit (DU) pool including a plurality of DUs to transmit an optical signal; a plurality of radio units (RUs) to receive the optical signal; and one or more dispersion management apparatus to remove a signal distortion component caused by an interaction between a chirp and chromatic dispersion by compensating for the chromatic dispersion before the plurality of RUs receives the optical signal that is transmitted from the DU pool.

公开(公告)号：US10027415B2

公开(公告)日：2018-07-17

申请号：US15079714

申请日：2016-03-24

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Seung Hyun Cho ,  Jong Hyun Lee ,  Hwan Seok Chung ,  Chan Gyo Han

IPC分类号： H04B10/25 ,  H04B10/2575

CPC分类号： H04B10/25753 ,  H04B10/25759

摘要： An apparatus for transmitting a control signal in a radio-over-fiber (RoF)-based mobile fronthaul includes: a data channel transmitter configured to generate a data signal at a preassigned frequency or wavelength; a control channel transmitter configured to generate a control signal at a designated frequency or wavelength that is shared with other apparatuses; and a combiner configured to combine the data signal with the control signal.

公开(公告)号：US09787395B2

公开(公告)日：2017-10-10

申请号：US15007739

申请日：2016-01-27

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Hwan Seok Chung ,  Seung Hyun Cho ,  Jong Hyun Lee ,  Sang Soo Lee ,  Chan Gyo Han

IPC分类号： H04B10/079 ,  H04B10/2575 ,  H04B10/50 ,  H04B10/564

CPC分类号： H04B10/07953 ,  H04B10/25759 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/564

摘要： An optical fiber cable of a mobile fronthaul system based on a radio over fiber (RoF), which includes a control apparatus for monitoring an analog optical link according to an exemplary embodiment, may be monitored. The monitoring control apparatus may include an optical signal monitor to monitor an optical signal passing through an optical fiber cable, and a system controller to control the optical signal based on a result of the monitoring. The optical signal monitor may calculate an average optical power, carrier-to-noise ratio (CNR), and a size of a nonlinear component from an electrical signal, which has been acquired from the optical signal. Then, the optical signal monitor may control the calculated average optical power, CNR, and nonlinear component.

公开(公告)号：US09755751B2

公开(公告)日：2017-09-05

申请号：US15016952

申请日：2016-02-05

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Joon Young Huh ,  Jong Hyun Lee ,  Jyung Chan Lee ,  Joon Ki Lee ,  Sae Kyoung Kang

IPC分类号： H04B10/00 ,  H04B10/04 ,  H04B10/40 ,  H04L27/00 ,  H04L7/00 ,  H04L7/033 ,  H04B10/516 ,  H04B10/60 ,  H04L27/02 ,  H04L27/20

CPC分类号： H04B10/40 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/60 ,  H04B10/69 ,  H04L7/0075 ,  H04L7/0331 ,  H04L7/0334 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/02 ,  H04L27/2067

摘要： An optical transceiver of a flexible modulation format. The optical transceiver may include an optical transmitter to convert an electrical signal to an optical signal and transmit the optical signal, an optical receiver to receive and convert the optical signal to an electrical signal, and a controller to set modulation formats of the optical transmitter and the optical receivers according to modulation format information.

公开(公告)号：US10200125B2

公开(公告)日：2019-02-05

申请号：US15337119

申请日：2016-10-28

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Seung Hyun Cho ,  Jong Hyun Lee ,  Hwan Seok Chung ,  Sun Me Kim

IPC分类号： H04B10/2575 ,  H04B10/27 ,  H04B7/0413

摘要： A radio-over-fiber (RoF) transmission system includes at least one baseband unit (BBU) connected to a core network of a service provider that provides a mobile Internet service, an optical line terminal (OLT) configured to convert a radio signal received from the at least one BBU into an optical signal, an optical distribution network (ODN) comprising an optical fiber and an optical splitter, at least one optical network unit (ONU) configured to receive the optical signal from the OLT via the ODN and convert the optical signal into a radio signal, and at least one remote radio head (RRH) configured to receive the radio signal from the at least one ONU and output the radio signal via a plurality of antennas.