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公开(公告)号：US10382894B2
公开(公告)日：2019-08-13
申请号：US16033404
申请日：2018-07-12
Inventor： Hoe Sung Yang , Seung Il Myong , Kang Bok Lee , Jun Ho Jin
Abstract: A method of measuring inter-device relative coordinates performed by a first device communicating with at least one second device belonging to a group to which the first device belongs includes measuring a range between the first device and the second device through communication with the second device; receiving range information between a plurality of second devices from the second device; calculating a plurality of solutions for inter-device relative coordinates using information about the range between the first device and the second device and the range information between the plurality of second devices; and deducing a true solution among the plurality of solutions for the inter-device relative coordinates using coordinates of each of the first device and the at least one second device with respect to a reference origin that is calculated using a Pedestrian Dead Reckoning (PDR) technique.
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公开(公告)号：US11729597B2
公开(公告)日：2023-08-15
申请号：US17534563
申请日：2021-11-24
Inventor： Seung Il Myong , Woo Sug Jung , Mi Suk Lee
CPC classification number: H04W4/90 , G06T19/003 , H04W4/38 , H04W4/80
Abstract: Provided is a digital twin disaster management system customized to keep safety for urban underground tunnels, including: a sensor sub-system configured to detect environmental information, status information and image information in the urban underground tunnels; a digital twin model management sub-system configured to create and update a virtual space corresponding to the urban underground tunnels using information provided from the sensor sub-system and 3D space, insert various types of attributes into the virtual space, detect tagging information, predict the spread of each disaster, and infer a degree of risk of a management facility; a disaster management sub-system having a control function of conducting centralized supervision by displaying information about components installed in the urban underground tunnels in the metaverse space and recording a situation; and a network sub-system configured to provide the virtual space to a user terminal of an external inspector.
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3.发明授权Wired/wireless converged MAC adaptor and method of transmitting frame using wired/wireless converged MAC adaptor 有权有线/无线融合MAC适配器和使用有线/无线融合MAC适配器发送帧的方法公开(公告)号：US09137850B2
公开(公告)日：2015-09-15
申请号：US13729582
申请日：2012-12-28
Inventor： Kwang Ok Kim , Seung Il Myong , Sang Soo Lee , Jong Hyun Lee
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。
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Patent Agency Ranking
4.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
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。
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5.发明授权公开(公告)号：US10447376B2
公开(公告)日：2019-10-15
申请号：US16265049
申请日：2019-02-01
Inventor： Hak June Lee , Seung Il Myong , Hoe Sung Yang , Kang Bok Lee
Abstract: A communication method in a wireless communication system includes receiving, by a resonator unit of a first signal transfer apparatus, a wireless signal transmitted from a transmission apparatus, acquiring resonance energy from the wireless signal using at least one of a matcher unit and the resonator unit of the first signal transfer apparatus, transferring the wireless signal to one end of a transmission line via the matcher unit of the first signal transfer apparatus using the acquired resonance energy, transferring the wireless signal to a second signal transfer apparatus connected to an opposite end of the transmission line, and transmitting the wireless signal to a reception apparatus having a wireless link established with the second signal transfer apparatus using a matcher unit and a resonator unit of the second signal transfer apparatus.
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公开(公告)号：US09246628B2
公开(公告)日：2016-01-26
申请号：US13728089
申请日：2012-12-27
Inventor： Seung-Hyun Cho , Jie Hyun Lee , Seung Il Myong , Sang Soo Lee , Jong Hyun Lee , Eui Suk Jung , Kwang Ok Kim
IPC: H04J14/02
CPC classification number: H04J14/0278 , H04J14/02 , H04J14/0246 , H04J14/0247 , H04J14/025 , H04J14/0252 , H04J14/0282 , H04J14/0298 , H04J2014/0253
Abstract: Provided is a hybrid passive optical network (PON) system. The hybrid PON system of wavelength division multiplexing (WDM)/time division multiplexing (TDM) may include an optical line terminal (OLT) and an optical network unit (ONU). The OLT and the ONU may transmit a signal based on wavelength reuse using a seed light source and a reflective modulator. The light source may include a seed light source having a single wavelength, two seed light sources having different wavelength bands, and a light source having a wavelength tunable characteristic.
Abstract translation: 提供了一种混合无源光网络（PON）系统。 波分复用（WDM）/时分复用（TDM）的混合PON系统可以包括光线路终端（OLT）和光网络单元（ONU）。 OLT和ONU可以使用种子光源和反射调制器来发射基于波长重用的信号。 光源可以包括具有单个波长的种子光源，具有不同波长带的两个种子光源和具有波长可调特性的光源。
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公开(公告)号：US09219567B2
公开(公告)日：2015-12-22
申请号：US13729638
申请日：2012-12-28
Inventor： Kwang Ok Kim , Seung-Hyun Cho , Jie Hyun Lee , Seung Il Myong , Sang Soo Lee , Jong Hyun Lee
CPC classification number: H04J14/08 , H04Q11/0005 , H04Q2011/0064
Abstract: A converged passive optical network (CPON) and a data transmission method are disclosed. The CPON is a combination of a time division multiple access-passive optical network (TDMA-PON) and an orthogonal frequency division multiple access-passive optical network (OFDMA-PON) and is able to dynamically controlling a bandwidth for upstream signal transmission through allocation of multiple subcarriers to each single optical network unit (ONU).
Abstract translation: 公开了一种融合无源光网络（CPON）和数据传输方法。 CPON是时分多址无源光网络（TDMA-PON）和正交频分多址无源光网络（OFDMA-PON）的组合，能够通过分配动态地控制上行信号传输的带宽 的多个子载波到每个单个光网络单元（ONU）。
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公开(公告)号：US09130675B2
公开(公告)日：2015-09-08
申请号：US13729521
申请日：2012-12-28
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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