公开(公告)号：US09137850B2

公开(公告)日：2015-09-15

申请号：US13729582

申请日：2012-12-28

Applicant: Electronics and Telecommunications Research Institute

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

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

CPC classification number: H04W88/06 ,  H04L5/0091 ,  H04L27/2602

Abstract: 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.

Abstract translation: 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

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。

公开(公告)号：US09755778B2

公开(公告)日：2017-09-05

申请号：US15071702

申请日：2016-03-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kyeong Hwan Doo ,  Sang Soo Lee ,  Jun Seong Bang

IPC: H04J14/08 ,  H04B10/27

CPC classification number: H04J14/08 ,  H04B10/27 ,  H04Q11/0001

Abstract: Provided are an Optical Network Unit (ONU) for low latency packet transmission in a Time Division Multiplexing-Passive Optical Network (TDM-PON), a method of operating the ONU, and an apparatus for controlling the ONU. The method includes: receiving, from a base station, first bandwidth allocation information regarding a bandwidth allocated by the base station to a terminal for uplink packet transmission; and transmitting a bandwidth allocation request, which is based on the received first bandwidth allocation information, to an Optical Line Terminal (OLT) before completing packet reception from the base station.

公开(公告)号：US09720192B2

公开(公告)日：2017-08-01

申请号：US14619539

申请日：2015-02-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jyung Chan Lee ,  Eun Gu Lee ,  Sil Gu Mun ,  Sang Soo Lee

IPC: H04B10/00 ,  G02B6/42

CPC classification number: G02B6/4279

Abstract: An interface for transmitting a high-speed signal and an optical module including the same. The interface may include a main substrate and a sub-substrate. The main substrate may have at least one high-speed signal line formed on the upper surface of the main substrate. The sub-substrate may have a first conductive line formed on the lower surface thereof so as to adjust high-speed signal transmission characteristics of the high-speed signal line, wherein the first conductive line may be coupled to the upper surface of the main substrate and partially overlap with the high-speed signal line.

公开(公告)号：US09705457B2

公开(公告)日：2017-07-11

申请号：US14875893

申请日：2015-10-06

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Young Ho Kim ,  Sang Soo Lee

IPC: H03K5/153 ,  H03F3/45 ,  H03F3/08 ,  G01R19/04 ,  G01R19/00

CPC classification number: H03F3/45183 ,  G01R19/0084 ,  G01R19/04 ,  H03F3/082 ,  H03F2200/435

Abstract: A signal level detector comprising and a Burst-Mode Trans Impedance Amplifier (BM-TIA) using the same. The signal level detector includes a level detector configured to detect peak voltage of an input voltage signal, a reference voltage generator configured to generate second reference voltage by receiving first reference voltage, a comparator configured to compare the peak voltage and the second reference voltage and output a discrimination value according to a comparison result, and a latch configured to store the differential output from the comparator, wherein the level detector and the reference voltage generator have differential amplifier in the same structure.