公开(公告)号：US20210050909A1

公开(公告)日：2021-02-18

申请号：US16991564

申请日：2020-08-12

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

Inventor： Nagwon KWON ,  Hyunchae KIM ,  Chonghoon KIM ,  Seungmo HONG ,  Sungbin IM

IPC: H04B7/155

Abstract: A method of operating a repeater comprises selecting some of adaptive filter coefficients among a plurality of adaptive filter coefficients of an adaptive filter used for interference cancellation, based on the size of a coefficient, generating a predicted interference signal using the selected adaptive filter coefficients and generating an interference-canceled communication signal from a received signal using the generated predicted interference signal.

公开(公告)号：US10903973B2

公开(公告)日：2021-01-26

申请号：US15700581

申请日：2017-09-11

Applicant: SOLiD, INC.

Inventor： Yongki Cho ,  Yeongshin Yeo

IPC: H04L5/14 ,  H04B1/525 ,  H04B1/52 ,  H04B7/155

Abstract: According to an example embodiment of the inventive concept, a master unit for time division duplex includes a passive signal distributor for outputting, to a second node, a downlink signal input through a first node, and outputting, to the first node, an uplink signal input through a third node, and a signal transceiver for transmitting, to a remote unit, the downlink signal input from the second node, and outputting, to the third node, an uplink amplification signal received from the remote unit.

公开(公告)号：US10887008B2

公开(公告)日：2021-01-05

申请号：US16752982

申请日：2020-01-27

Applicant: SOLiD, INC.

Inventor： Ok Jin Kim

IPC: H04B10/00 ,  H04B10/079 ,  H04B10/2575 ,  H04L7/04 ,  H04J3/06 ,  H04L7/00 ,  G01S19/13

Abstract: The present invention provides a method of optical transmission delay compensation of a system including a main unit and a remote unit, wherein the main unit and the remote unit are connected to each other through an optical transmission line, including: receiving a reference signal, by the remote unit, generated by the main unit through the optical transmission line; analog converting the reference signal and performing analog processing on the reference signal; converting the analog-processed reference signal into an RF signal and radiating the RF signal; and measuring a delay time until the reference signal is generated and radiated as the RF signal. Accordingly, it is possible to obtain an effect of preventing degradation of service quality due to interference by synchronizing remote units and improving the service quality.

公开(公告)号：US10820215B2

公开(公告)日：2020-10-27

申请号：US15546186

申请日：2015-04-23

Applicant: SOLiD, INC.

Inventor： Youngman Cho ,  Doyoon Kim ,  Jinhwa Ku ,  Hyoungho Kim

IPC: H04W24/00 ,  H04W24/04 ,  H04B17/19 ,  H04B17/354 ,  H04B17/10 ,  H04B17/336 ,  H04W88/08

Abstract: The present invention provides a distributed antenna system for automatically detecting an abnormally operating node unit. According to an embodiment of the present invention, a node unit of the distributed antenna system includes a signal input unit configured to receive and output first through n-th state information from n other node units connected to the node unit, where n is a natural number greater than or equal to 2; and a controller configured to analyze the first through n-th state information and to determine states of uplink signals respectively corresponding to the first through n-th state information. Each of the n other node units may analyze a signal received through a service antenna and generate the state information.

公开(公告)号：US10785082B2

公开(公告)日：2020-09-22

申请号：US16442460

申请日：2019-06-15

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.

公开(公告)号：US10727946B2

公开(公告)日：2020-07-28

申请号：US15692341

申请日：2017-08-31

Applicant: SOLiD Inc.

Inventor： Young Man Cho ,  Hee Hwan Kwak

IPC: H04B10/2575 ,  H04W52/02 ,  H04W80/02 ,  H04W88/08

Abstract: An analog distributed antenna system having a set of small cells as a signal source is provided. A proposed cellular communication system includes an upper small cell unit including upper protocol processors configured to process an upper first part of a protocol stack of a small cell, a lower small cell unit including lower protocol processors configured to process a remaining second part of the protocol stack of the small cell, and a first matching switch configured to respectively match the lower protocol processors to a plurality of remote units. According to one aspect, the cellular communication system includes a common controller configured to control activation of the plurality of upper protocol processors of the upper small cell unit and the plurality of lower protocol processors of the lower small cell unit according to a required service capacity and appropriately control an operation of the first matching switch.

公开(公告)号：US20200221312A1

公开(公告)日：2020-07-09

申请号：US16819337

申请日：2020-03-16

Applicant: SOLID, INC.

Inventor： Ok Jin KIM ,  Dae Young KIM

IPC: H04W16/14 ,  H04W4/02 ,  H04W76/15 ,  H04W72/04 ,  H04W76/11

Abstract: The present disclosure provides a method of allocating shared radio resources in a spectrum shared system (SSS), the method including: obtaining, by a system controller of the SSS, identification information from at least one radio service device of the SSS and a node unit of a distributed antenna system (DAS); determining, by the system controller of the SSS, whether the at least one radio service device interoperates with the DAS based on the identification information; and allocating, by the system controller of the SSS, the shared radio resources to the at least one radio service device and the DAS, respectively, based on a result of the determining of interoperating.

公开(公告)号：US10686517B2

公开(公告)日：2020-06-16

申请号：US15909481

申请日：2018-03-01

Applicant: SOLiD, INC.

Inventor： Inho Jang ,  Hyunchae Kim

IPC: H04B7/14 ,  H04B7/155 ,  H04B17/318 ,  H03F1/32 ,  H03F3/19 ,  H03F3/21 ,  H04L5/00

Abstract: Provided is an interference cancellation relay device. The interference cancellation relay device includes: an interference cancellation unit cancelling an interference signal from an input signal and outputting the input signal from which the interference signal is removed; a gain control unit controlling a gain of an output signal of the interference cancellation unit; and a pre-distortion unit distorting the output signal of the interference cancellation unit, of which the gain is controlled by the gain control unit.

公开(公告)号：US10581520B2

公开(公告)日：2020-03-03

申请号：US16062951

申请日：2016-03-28

Applicant: SOLiD, INC.

Inventor： Ok Jin Kim

IPC: H04B10/00 ,  H04B10/079 ,  H04B10/2575 ,  H04L7/04 ,  H04J3/06 ,  H04L7/00 ,  G01S19/13

Abstract: The present invention provides a method of optical transmission delay compensation of a system including a main unit and a remote unit, wherein the main unit and the remote unit are connected to each other through an optical transmission line, including: receiving a reference signal, by the remote unit, generated by the main unit through the optical transmission line; analog converting the reference signal and performing analog processing on the reference signal; converting the analog-processed reference signal into an RF signal and radiating the RF signal; and measuring a delay time until the reference signal is generated and radiated as the RF signal. Accordingly, it is possible to obtain an effect of preventing degradation of service quality due to interference by synchronizing remote units and improving the service quality.

公开(公告)号：US10574357B2

公开(公告)日：2020-02-25

申请号：US16381259

申请日：2019-04-11

Applicant: SOLiD, INC.

Inventor： Young Ju You

IPC: H04B10/00 ,  H04B10/2575 ,  H04B7/024 ,  H04B7/0413 ,  H01Q1/24 ,  H04B7/022 ,  H04W88/08

Abstract: A head-end device according to an embodiment includes: a plurality of base station interfacing units configured to interface each of transmission/reception signals that are exchanged between the head-end device and a plurality of base stations; and a head-end control unit configured to receive an upper interfacing unit signal transmitted from an upper base station interfacing unit from among the plurality of base station interfacing units, and sequentially transmit the received upper interfacing unit signal to a lower base station interfacing unit.