公开(公告)号：US20210021521A1

公开(公告)日：2021-01-21

申请号：US17063146

申请日：2020-10-05

Applicant: SOLiD, INC

Inventor： Hoo Pyo HONG ,  Dong Hee KWON ,  Hee Hwan KWAK

IPC: H04L12/801 ,  H04L12/851 ,  H04L12/813 ,  H04L12/823 ,  H04W28/02 ,  H04L29/08

Abstract: According to one or more embodiments of the present invention, a frame processing method of a distributed antenna system may include confirming whether a quality of service (QoS) tag exists in header information of a received frame; performing frame scheduling of the frame based on the QoS tag; and dropping or transmitting the frame according to a transmission priority according to a result of the frame scheduling.

公开(公告)号：US10897327B2

公开(公告)日：2021-01-19

申请号：US16234545

申请日：2018-12-27

Applicant: SOLiD Inc.

Inventor： Young Man Cho

IPC: H04L27/00 ,  H04L1/00 ,  H04B7/024 ,  H04B17/309

Abstract: A technology related to a distributed antenna system is disclosed. In an exemplary embodiment, a distributed antenna system may include a master unit and a plurality of remote units. The master unit may be interfaced with a wireless communications network and perform a bidirectional simultaneous digital radio frequency distribution of a wireless signal. The plurality of remote units may be each coupled to the master unit, and each perform a wireless transmission or reception of a split radio frequency signal to or from terminals located within a coverage. The master unit and the plurality of remote units may transmit or receive digital radio frequency signals in a wavelet transform domain. The master unit may determine whether the digital radio frequency signal, transmitted by each of the remote units, is normal, and merge the digital radio frequency signals.

公开(公告)号：US20200322811A1

公开(公告)日：2020-10-08

申请号：US16652912

申请日：2019-07-23

Applicant: SOLID, INC.

Inventor： Sangwook KANG ,  Hoony HONG ,  Hyunchae KIM ,  Kwon KIM ,  Woosik MOON

IPC: H04W16/26 ,  H04L5/14 ,  H04W56/00 ,  H04B7/155

Abstract: A method of operating a repeater comprises detecting a synchronization signal from a received communication signal, identifying a time division duplex (TDD) switching pattern based on a power change of the communication signal over time and switching an uplink operation and a downlink operation of the repeater based on the detected synchronization signal and the TDD switching pattern.

公开(公告)号：US10763959B2

公开(公告)日：2020-09-01

申请号：US15777475

申请日：2016-11-18

Applicant: SOLiD, INC.

Inventor： Tae Hyeong Kim ,  Won Song Chang ,  Sun Keun Yu

IPC: H04B10/079 ,  H04J14/02 ,  H04B10/27

Abstract: A wavelength-setting auxiliary device according to an embodiment of the inventive concept includes an optical wavelength analyzer configured to transmit a test signal having a first wavelength to an optical line terminal, and to execute a central wavelength detection algorithm based on a result of detecting power of a return signal for the test signal to set optical wavelength information of a tunable optical module, and a connector connected to the tunable optical module for interfacing data transmitted between the optical wavelength analyzer and the tunable optical module.

公开(公告)号：US10763795B2

公开(公告)日：2020-09-01

申请号：US16711705

申请日：2019-12-12

Applicant: SOLiD, INC.

Inventor： Kwang Nam Seo ,  Do Yoon Kim ,  Hyoung Ho Kim

IPC: H03F3/19 ,  H03F1/32 ,  H04L25/03 ,  H03F3/24 ,  H04B1/04

Abstract: The present invention, which relates to a multi-path communication device for sharing a feedback path for digital pre-distortion, includes: a DPD processing unit configured to output a plurality of pre-distorted signals by respectively pre-distorting a plurality of input signals, to output an nth control signal when an nth input signal is input, and to output an nth pre-distorted signal using an nth feedback signal input in response to the nth control signal; a power amplifying unit configured to amplify each of the plurality of pre-distorted signals and output a plurality of amplified signals; a signal combining unit configured to combine some of each of the plurality of amplified signals and output combined feedback signal; and a signal selection unit configured to select and output only the nth feedback signal from the combined feedback signal according to the input nth control signal, thereby preventing an increase in the size of a device and manufacturing cost thereof caused by a plurality of DPD feedback paths.

公开(公告)号：US10690567B2

公开(公告)日：2020-06-23

申请号：US16166381

申请日：2018-10-22

Applicant: SOLiD, INC.

Inventor： Kee-Woon Na

IPC: G01M11/00 ,  H04B10/07 ,  H01S5/14 ,  H04B10/071 ,  H04B10/50 ,  H01S5/00 ,  H01S5/0687

Abstract: The present invention relates to an optical time domain reflectometer using, as a optical source, a polymer wavelength tunable laser which tunes the wavelength of an optical signal by using polymer grating. The optical time domain reflectometer of the present invention tunes the wavelength of a polymer wavelength tunable laser that outputs a constant optical signal and inspects cutting, reflection, and damage of an optical line by separating an optical signal returning from the optical line by an optical filter having a specific central wavelength. Since a optical source having a constant light intensity is used, the present invention has an effect of reducing the nonlinear effect generated in an optical line.

公开(公告)号：US10681664B2

公开(公告)日：2020-06-09

申请号：US16548929

申请日：2019-08-23

Applicant: SOLiD, INC.

Inventor： Doyoon Kim ,  Hyoungho Kim

IPC: H04W56/00 ,  H04L7/00 ,  H04B17/10 ,  H04B17/14 ,  H04W88/08

Abstract: Provided is a node unit which is branch-connected to another communication node via a transport medium, the node unit comprising: a delay measurement unit which transmits a test signal for measuring a delay to an adjacent node unit of the branch-connected upper stage via the transport medium and detects a loopback signal to which the test signal is looped back via the adjacent node unit of the upper stage, thereby measuring an upper stage transmission delay between the adjacent node unit of the upper stage and the node unit; a delay summation unit which, when an adjacent node unit of the branch-connected lower stage exists, receives a lower stage transmission delay transmitted from the adjacent node unit of the lower stage, and calculates a summed transmission delay by summing the upper stage transmission delay and the lower stage transmission delay; and a control unit which transmits the summed transmission delay to the adjacent node unit of the upper stage.

公开(公告)号：US10448323B2

公开(公告)日：2019-10-15

申请号：US15084875

申请日：2016-03-30

Applicant: SOLiD, INC.

Inventor： Hyoungho Kim ,  Kwon Kim ,  Jonggu Lee ,  Heegon Kim

IPC: H04W52/02 ,  H04B1/40

Abstract: A node unit of a distributed antenna system includes a power supply unit for supplying power for operating the node unit, a digital part operated by the power supplied from the power supply unit, the digital part performing digital processing on input relay signals and outputting the digital-processed relay signals, and a controller for disabling an output of the digital part in response to a first control command for instructing a reset of the power supply unit or a second control command for instructing a reset of the digital part.

公开(公告)号：US10389441B2

公开(公告)日：2019-08-20

申请号：US15811029

申请日：2017-11-13

Applicant: SOLiD, INC.

Inventor： Chiyoung Park

IPC: H04J14/02 ,  H04B10/079 ,  H04B10/2575

Abstract: There is provided an optical signal monitoring device and an optical signal monitoring system of a wavelength division multiplexing based network including: an input unit configured to receive each of downlink signals and uplink signals; a wavelength division multiplexing filter configured to separate the downlink signals and the uplink signals by wavelength; an optical power measurement module configured to measure optical power of each signal separated by wavelength; and a controller configured to determine whether an optical signal is abnormal based on optical power information measured by the optical power measurement module.

公开(公告)号：US10374687B2

公开(公告)日：2019-08-06

申请号：US15598367

申请日：2017-05-18

Applicant: SOLiD, INC.

Inventor： Kyung Eun Han

IPC: H04B7/155 ,  H04W52/46 ,  H04M1/00

Abstract: A base station signal matching device configured to receive a base station signal from a base transceiver station (BTS), the base station signal matching device is embedded in a relay device, and the base station signal matching device includes a signal attenuation unit configured to receive the base station signal and attenuate the input power level of the base station signal; and a signal matching unit configured to receive the base station signal passing through the signal attenuation unit to match the base station signal suitable for signal processing of the relay device.