公开(公告)号：US11716147B2

公开(公告)日：2023-08-01

申请号：US17397018

申请日：2021-08-09

Applicant: SOLiD, INC.

Inventor： Eun Sung Lee

IPC: H04B10/27

CPC classification number: H04B10/27

Abstract: Provided is an optical communication device including: a first channel card configured to convert an input first signal into a first optical signal and output the first optical signal to any one of a first MUX/DEMUX connected to a first optical line and a second MUX/DEMUX connected to a second optical line; a second channel card configured to convert an input second signal into a second optical signal and output the second optical signal to any one of the first MUX/DEMUX and the second MUX/DEMUX; and a controller configured to monitor states of the first optical line and the second optical line to determine a MUX/DEMUX from which the first optical signal and the second optical signal are respectively output, from among the first MUX/DEMUX and the second MUX/DEMUX.

公开(公告)号：US20230179272A1

公开(公告)日：2023-06-08

申请号：US18049021

申请日：2022-10-24

Applicant: SOLiD, INC. ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY

Inventor： Nagwon KWON ,  Hyunchae Kim ,  Jihoon Choi

IPC: H04B7/0456 ,  H04L5/00

CPC classification number: H04B7/0456 ,  H04L5/0098

Abstract: A communication node included in a multi-antenna multi-carrier system, when precoding matrices corresponding to some subcarriers from among subcarriers allocated to another communication node connected to the communication node are input, obtains precoding matrices for at least some subcarriers from among the allocated subcarriers by performing spherical interpolation on the input precoding matrices, maps the obtained precoding matrices for the at least some subcarriers to the subcarriers allocated to the other communication node, and performs precoding on the plurality of vector signals using the mapped precoding matrices.

公开(公告)号：US11579863B2

公开(公告)日：2023-02-14

申请号：US17075253

申请日：2020-10-20

Applicant: SOLiD, INC.

Inventor： Bum Soo Park ,  Chi Young Park ,  Gil Koog Kim

IPC: G06F8/65 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60

Abstract: Provided is an optical transceiver including: a controller configured to output firmware update data for updating firmware of another optical transceiver connected to the optical transceiver through an optical cable; and a transmitter configured to generate an optical signal by superposing input payload data and the firmware update data, and to transmit the optical signal to the other optical transceiver. According to embodiments, the firmware of a remote optical transceiver at a remote location is automatically updated without affecting payload data, which is information to be transmitted.

公开(公告)号：US11533107B2

公开(公告)日：2022-12-20

申请号：US17092688

申请日：2020-11-09

Applicant: SOLiD, INC.

Inventor： Bum Soo Park

IPC: H04B10/079 ,  H04B10/2575

Abstract: Provided is a base station signal monitoring system including: a plurality of optical transmission devices configured to transmit a base station signal; a measuring device configured to measure the base station signal according to a preset method; and a switch device, which is connected to the plurality of optical transmission devices and the measuring device, configured to switch connections between a plurality of input ports and a plurality of output ports so that the base station signal is transmitted from one of the plurality of optical transmission devices to the other one of the plurality of optical transmission devices or the measuring device.

公开(公告)号：US20220352929A1

公开(公告)日：2022-11-03

申请号：US17272937

申请日：2019-07-25

Applicant: Solid, Inc.

Inventor： Ho Sik Jang ,  Hoo Pyo Hong ,  Hyong Ho Kim ,  Dong Hee Kwon ,  Kyung Eun Han ,  Jin Hwa Ku ,  Dae Young Kim ,  Young Man Cho

IPC: H04B7/022 ,  H04B7/26 ,  H04Q3/00 ,  H04B17/11 ,  H04B17/15 ,  H04B17/29

Abstract: A distributed antenna system of the present invention implements duplication by a method of configuring a first headend unit and a second headend unit in an active state or in a standby state and connecting a hub unit or a remote unit to the first headend unit and the second headend unit and by a method of connecting, through a redundancy link, a hub unit or remote units of a branch group branched from and connected to each headend unit, activating the redundancy link according to the control of an active headend unit when an error occurs in a frame transmission path, and changing logical port states of a hub unit or remote units that cannot transmit frames due to the error in order to change the frame transmission path so that frame transmission is possible through the activated redundancy link.

公开(公告)号：US11483059B2

公开(公告)日：2022-10-25

申请号：US16991512

申请日：2020-08-12

Applicant: SOLiD, INC. ,  FOUNDATION OF SOONGSIL UNIVERSITY—INDUSTRY COOPERATION

Inventor： Nagwon Kwon ,  Hyunchae Kim ,  Chonghoon Kim

IPC: H04B3/36 ,  H04B7/17 ,  H04L25/20 ,  H04L25/52 ,  H04B7/155 ,  H04L5/14 ,  H04J3/02

Abstract: A method of operating a TDD-based interference cancellation repeater, the method comprises setting a compensation gain of a gain compensator differently in an uplink communication period and a downlink communication period, setting an optimal coefficient of an adaptive filter in the uplink communication period and an optimal coefficient of the adaptive filter in the downlink communication period the same, based on the set compensation gain of the gain compensator and removing an interference signal in the uplink communication period or the downlink communication period according to the set optimal coefficient of the adaptive filter.

公开(公告)号：US20220264494A1

公开(公告)日：2022-08-18

申请号：US17627451

申请日：2020-08-10

Applicant: SOLiD, INC.

Inventor： Nagwon KWON

IPC: H04W56/00 ,  H04L5/14

Abstract: Provided are an interference cancellation repeater capable of selecting one of a plurality of adaptive filters based on a synchronization signal and canceling interference included in a received signal using the selected adaptive filter and a method of operation thereof.

公开(公告)号：US11202268B2

公开(公告)日：2021-12-14

申请号：US16421973

申请日：2019-05-24

Applicant: SOLiD, INC.

Inventor： Dong Hee Kwon ,  Hoo Pyo Hong ,  Yong Hoon Kang ,  Dae Young Kim ,  Young Man Cho

IPC: H04W72/04 ,  H04W56/00 ,  H04J3/06 ,  H04L29/06 ,  H04B7/15 ,  H04W88/08

Abstract: There is provided a method of processing uplink Ethernet packets of an aggregation node included in a distributed antenna system, the method includes: receiving a plurality of uplink Ethernet packets; summing the plurality of received uplink Ethernet packets; and transmitting the summed uplink Ethernet packets in an uplink direction.

公开(公告)号：US11184054B2

公开(公告)日：2021-11-23

申请号：US16638547

申请日：2019-05-27

Applicant: SOLiD, INC.

Inventor： Dong Hee Kwon ,  Hoo Pyo Hong

IPC: H04B7/04 ,  H04B1/40 ,  H04L27/00

Abstract: According to an aspect of the present disclosure, a method of processing a data stream in a node unit included in a distributed antenna system includes: receiving frame layout information; changing a frame layout of a predetermined transmission frame based on the received frame layout information; and framing a plurality of data streams based on the changed frame layout.

公开(公告)号：US20210234746A1

公开(公告)日：2021-07-29

申请号：US17228710

申请日：2021-04-13

Applicant: SOLiD, Inc.

Inventor： Dong Hee KWON ,  Hoo Pyo HONG ,  Young Man CHO ,  Dae Young KIM ,  Hyun Jung KIM

IPC: H04L27/34 ,  H04L12/709 ,  H04L12/721 ,  H04L12/851

Abstract: A TSN-based distributed antenna system including a headend unit, one or more TSN switches, and one or more remote units and a fronthaul transport network constituted by the headend unit, the TSN switch, and the remote unit is provided. The packet-based fronthaul network constituted by the headend unit, the TSN switch, and the remote unit transmits traffic in a time-deterministic manner while minimizing packet loss through Ethernet to which TSN standards are applied.