Patents by Inventor Jin Hwa Ku

Jin Hwa Ku has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Redundancy of distributed antenna systems
    Patent number: 11817918
    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.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: November 14, 2023
    Assignee: Solid, Inc.
    Inventors: Ho Sik Jang, Hoo Pyo Hong, Hyong Ho Kim, Dong Hee Kwon, Kyung Eun Han, Jin Hwa Ku, Dae Young Kim, Young Man Cho
  • REDUNDANCY OF DISTRIBUTED ANTENNA SYSTEMS
    Publication number: 20220352929
    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.
    Type: Application
    Filed: July 25, 2019
    Publication date: November 3, 2022
    Applicant: Solid, Inc.
    Inventors: Ho Sik Jang, Hoo Pyo Hong, Hyong Ho Kim, Dong Hee Kwon, Kyung Eun Han, Jin Hwa Ku, Dae Young Kim, Young Man Cho
  • Capacity enhancement schemes for forward and reverse links of distributed cellular base stations
    Patent number: 7200391
    Abstract: Capacity enhancement schemes are described for forward and reverse links of distributed cellular base stations consisting of a central unit and one or more remote units. In general, in one aspect, reverse link capacity is shared among remote units. The capacity sharing can be determined dynamically. The forward link capacity can also be enhanced by estimating the location of the mobile stations.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: April 3, 2007
    Assignees: Airvana, Inc., Solid Technologies, Inc.
    Inventors: Sae-Young Chung, M. Vedat Eyuboglu, Yong Hoon Kang, Dae-Young Kim, Jin Hwa Ku, Seung Hee Lee, Michael D. Pollman
  • Capacity enhancement schemes for forward and reverse links of distributed cellular base stations
    Publication number: 20040110534
    Abstract: Capacity enhancement schemes are described for forward and reverse links of distributed cellular base stations consisting of a central unit and one or more remote units. In general, in one aspect, reverse link capacity is shared among remote units. The capacity sharing can be determined dynamically. The forward link capacity can also be enhanced by estimating the location of the mobile stations.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Inventors: Sae-Young Chung, M. Vedat Eyuboglu, Yong Hoon Kang, Dae-Young Kim, Jin Hwa Ku, Seung Hee Lee, Michael D. Pollman