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公开(公告)号：US10396918B2
公开(公告)日：2019-08-27
申请号：US15401203
申请日：2017-01-09
Applicant: SOLID, INC.
Inventor： Hyoungho Kim , Doyoon Kim , Yeongshin Yeo
Abstract: A node unit of distributed antenna system, the node unit comprises a delay measuring part configured to transmit a first test signal for delay measurement to an upper adjacent node unit and detect the first test signal looped back via the upper adjacent node unit and measure a round trip delay between the node unit and the upper adjacent node unit, and a delay providing part disposed on a signal transmission path through which a second test signal for delay measurement, to be transmitted from a lower adjacent node unit, is to be looped back to the lower adjacent node unit, and configured to provide a delay corresponding to the round trip delay.
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公开(公告)号：US10193599B2
公开(公告)日：2019-01-29
申请号：US15401241
申请日：2017-01-09
Applicant: SOLID, INC.
Inventor： Kwangnam Seo , Hyoungho Kim , Doyoon Kim
Abstract: The inventive concept relates to a distributed antenna system (DAS), and more particularly, to an uplink signal transmission operation of each of node units constituting a DAS. A node unit of a DAS includes a multiplexer configured to generate a single uplink signal by selectively outputting any one of m uplink signals received from m lower node units at an interval of a predetermined output time, where m is a positive integer greater than 1, and a down-sampler configured to output a transmission uplink signal by converting a sampling rate of the single uplink signal to correspond to a sampling rate of any one of the m uplink signals. Accordingly, it is possible to provide a DAS capable of processing and outputting, as one signal, uplink signals received from a plurality of remote units, without any error.
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Patent Agency Ranking
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.
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14.发明申请公开(公告)号：US20190380102A1
公开(公告)日：2019-12-12
申请号：US16548929
申请日：2019-08-23
Applicant: SOLiD, INC.
Inventor： Doyoon Kim , Hyoungho Kim
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.
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公开(公告)号：US10397890B2
公开(公告)日：2019-08-27
申请号：US15540651
申请日：2014-12-31
Applicant: SOLiD, INC.
Inventor： Doyoon Kim , Hyoungho Kim
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.
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公开(公告)号：US10111107B2
公开(公告)日：2018-10-23
申请号：US15084843
申请日：2016-03-30
Applicant: SOLiD, INC.
Inventor： Hyoungho Kim , Doyoon Kim
Abstract: There is provided a distributed antenna system includes a plurality of head-end units configured to receive mobile communication signals from at least one base station, a hub unit connected to each of the plurality of head-end units through a first transport medium, the hub unit distributing the mobile communication signals respectively received from the plurality of head-end units to a plurality of remote units connected thereto through a second transport medium, and the plurality of remote units remotely disposed to transmit the mobile communication signals to a terminal in a service coverage, wherein the hub unit includes a signal summer configured to digitally sum sub-band signals in a same mobile communication service band based on the mobile communication signals.
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公开(公告)号：US09877356B2
公开(公告)日：2018-01-23
申请号：US15084716
申请日：2016-03-30
Applicant: SOLiD, INC.
Inventor： Hyoungho Kim , Doyoon Kim
CPC classification number: H04W88/085 , H04B7/022
Abstract: A distributed antenna system (DAS) according to an aspect of the inventive concept includes a first node unit for receiving first digital data in accordance with a digital interface standard from a base station, converting the first digital data into second digital data in accordance with a DAS frame standard, and a second node unit for receiving the second digital data from the first node unit, and restoring the first digital data based on the second digital data.
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