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    DESIGN METHOD OF BEACON-BASED POSITIONING SYSTEM
    1.
    发明申请
    DESIGN METHOD OF BEACON-BASED POSITIONING SYSTEM 有权

    公开(公告)号：US20220065973A1

    公开(公告)日：2022-03-03

    申请号：US17006764

    申请日：2020-08-28

    申请人： SOLiD, Inc.

    发明人： Young Man Cho ,  Yvonne Hee Jun Cho

    IPC分类号： G01S1/04 ,  G01S1/10 ,  H04B17/318

    摘要： Disclosed is a beacon-based positioning system. A beacon position in which a beacon is installable is defined in a target space, and a path loss model of radio frequency (RF) signals between all beacon positions and all observation positions of a scanner is determined. Among all possible installation plans for the beacon positions, an installation plan in which different beacon signals, whose RSSIs calculated using the path loss model have significant values, are received in a number greater than or equal to a minimum reference number and a total number of the beacons installed is minimum is determined as an optimal installation plan. The optimization problem of determining the optimal installation plan may be expressed by binary linear programming.

    OpenFlow based distributed antenna system
    2.
    发明授权
    OpenFlow based distributed antenna system 有权

    公开(公告)号：US11252092B2

    公开(公告)日：2022-02-15

    申请号：US17026314

    申请日：2020-09-21

    申请人： SOLiD Inc.

    发明人： Dong Hee Kwon ,  Hoo Pyo Hong ,  Young Man Cho

    IPC分类号： H04L12/813 ,  H04L47/20 ,  H04B7/022 ,  H04L41/0803 ,  H04L41/0893 ,  H04L45/02 ,  H04W88/08 ,  H04L45/64 ,  H04L45/302 ,  H04L47/2441

    摘要： Disclosed is a distributed antenna system (DAS). The DAS includes a DAS controller, which is an OpenFlow controller, and one or more DAS units in order to dynamically control a traffic transmission policy of the DAS units using an OpenFlow protocol, wherein the DAS controller generates and changes a traffic transmission policy by reflecting a traffic transmission policy change request by operator manipulation or a software-defined network supporting application and a need for changing of the traffic transmission policy according to a status of the DAS unit and a status of a port, and the DAS unit transmits received traffic to a destination according to the policy.

    Cellular communication system having a set of small cells as a signal source
    4.
    发明授权
    Cellular communication system having a set of small cells as a signal source 有权

    公开(公告)号：US10727946B2

    公开(公告)日：2020-07-28

    申请号：US15692341

    申请日：2017-08-31

    申请人： SOLiD Inc.

    发明人： Young Man Cho ,  Hee Hwan Kwak

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

    摘要： 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.

    Method of beacon-based positioning system
    6.
    发明授权
    Method of beacon-based positioning system 有权

    公开(公告)号：US11567158B2

    公开(公告)日：2023-01-31

    申请号：US17006764

    申请日：2020-08-28

    申请人： SOLiD, Inc.

    发明人： Young Man Cho ,  Yvonne Hee Jun Cho

    IPC分类号： G01S1/04 ,  G01S5/02 ,  H04B17/318 ,  H04W16/18 ,  H04W16/20

    摘要： Disclosed is a beacon-based positioning system. A beacon position in which a beacon is installable is defined in a target space, and a path loss model of radio frequency (RF) signals between all beacon positions and all observation positions of a scanner is determined. Among all possible installation plans for the beacon positions, an installation plan in which different beacon signals, whose RSSIs calculated using the path loss model have significant values, are received in a number greater than or equal to a minimum reference number and a total number of the beacons installed is minimum is determined as an optimal installation plan. The optimization problem of determining the optimal installation plan may be expressed by binary linear programming.

    Cellular communication system having a set of small cells as a signal source
    7.
    发明授权
    Cellular communication system having a set of small cells as a signal source 有权

    公开(公告)号：US11381311B2

    公开(公告)日：2022-07-05

    申请号：US16906102

    申请日：2020-06-19

    申请人： SOLiD Inc.

    发明人： Young Man Cho ,  Hee Hwan Kwak

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

    摘要： 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.

    Distributed antenna system
    8.
    发明授权
    Distributed antenna system 有权

    公开(公告)号：US10897327B2

    公开(公告)日：2021-01-19

    申请号：US16234545

    申请日：2018-12-27

    申请人： SOLiD Inc.

    发明人： Young Man Cho

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

    摘要： 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.

    Distributed antenna system
    9.
    发明授权
    Distributed antenna system 有权

    公开(公告)号：US10200157B2

    公开(公告)日：2019-02-05

    申请号：US15091912

    申请日：2016-04-06

    申请人： SOLiD Inc.

    发明人： Young Man Cho

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

    摘要： 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.

    REDUNDANCY OF DISTRIBUTED ANTENNA SYSTEMS
    10.
    发明申请
    REDUNDANCY OF DISTRIBUTED ANTENNA SYSTEMS 有权

    公开(公告)号：US20220352929A1

    公开(公告)日：2022-11-03

    申请号：US17272937

    申请日：2019-07-25

    申请人： Solid, Inc.

    发明人： 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分类号： H04B7/022 ,  H04B7/26 ,  H04Q3/00 ,  H04B17/11 ,  H04B17/15 ,  H04B17/29

    摘要： 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.