Patents by Inventor Ki-Ho Lee

Ki-Ho Lee 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).

  • Patent number: 9571184
    Abstract: A signal processing system and method are disclosed. The signal processing system includes a digital unit connected to a core system and a plurality of radio units physically isolated from the digital unit. The digital unit is configured to process radio digital signals. The plurality of radio units are configured to convert and amplify digital signals from the digital unit, to transmit the amplified signals to a terminal based on a multi-antenna technology using two antennas, and to receive the signals from the terminal and to transmit the same to the digital unit based on the multi-antenna technology using two antennas.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: February 14, 2017
    Assignee: KT CORPORATION
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji
  • Patent number: 9565606
    Abstract: Described embodiments provide controlling signal transmission in a plurality of radio units. The plurality of radio units may be coupled to a digital unit. The digital unit may be spatially separated from the plurality of radio units. Signal quality measurements may be received from multiple radio units when a user equipment is located within an overlapping service area of the multiple radio units. Determination may be made as to whether to simultaneously use at least two of the multiple radio units to transmit a data signal to the user equipment based on the received signal quality measurements. At least two of the multiple radio units may be controlled to transmit a same data signal to the user equipment using a same channel based on the determination result.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: February 7, 2017
    Assignee: KT CORPORATION
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji
  • Patent number: 9485737
    Abstract: Described embodiments provide a method for controlling radio units to transmit a signal to user equipment wherein each one of the radio units includes at least two antennas associated with a different transmission pattern. The method may include determining whether user equipment is located at an overlapping cell area of a first cell and a second cell and controlling a first radio unit in the first cell to transmit a signal to the user equipment using a first resource block and controlling a second radio unit in the second cell to transmit a reference signal associated with the first resource block with a second transmission power when the user equipment is determined as being located in the overlapping cell area. The second transmission power may be lower than a first transmission power of the first radio unit in the first cell for transmitting a reference signal using the first resource block.
    Type: Grant
    Filed: December 22, 2012
    Date of Patent: November 1, 2016
    Assignee: KT CORPORATION
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji
  • Patent number: 9479969
    Abstract: A system and method for handoff in an integrated cell. A user equipment selects an integrated cell as a target cell supporting a target network based on a white list and physical cell identities. A cell-to-cell handoff is performed to the target cell. After the cell-to-cell handoff, a base station of the target cell establishes a communication session directly to a service. Then, the user equipment determines whether or not a physical cell identity of a base station of the target cell is an integrated physical cell identity. The user equipment turns on a module for the target network when the physical cell identity of the base station is determined to be the integrated physical cell identity. A heterogeneous-network handoff is then performed, and the base station communicates directly with a service server using a mapping table in order to seamlessly provide the service to the user equipment.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 25, 2016
    Assignee: KT CORPORATION
    Inventor: Ki-Ho Lee
  • Publication number: 20160303067
    Abstract: The present disclosure provides a compound represented by Formula (I) and a pharmaceutically acceptable salt which are effective as a dopamine reuptake inhibitor and a method of using the compound: wherein X is independently halo, alkyl, alkoxy or nitro; m is 0, 1, 2, 3 or 4; n is 1 or 2; R1 and R2 are independently H— or alkyl; R3 is H—, alkyl or aralkyl; and R4 is H— or aryl.
    Type: Application
    Filed: June 28, 2016
    Publication date: October 20, 2016
    Inventors: Young-Soon KANG, Jin-Yong CHUNG, Cheol-Young MAENG, Han-Ju YI, Ki-Ho LEE, Joon HEO, Eun-Hee CHAE, Yu-Jin SHIN
  • Publication number: 20160278110
    Abstract: Disclosed herein are a base station apparatus, a resource management method, and a data processing method. The base station apparatus includes: a remote active antenna unit configured to perform transmission and reception of a wireless signal to and from a terminal; and a central unit connected to the remote active antenna unit, configured to process a signal received from the terminal or a signal to be transferred to the terminal, and configured to transfer resource allocation information to the remote active antenna unit, in which the remote active antenna unit schedules a data and a resource for the terminal based on resource allocation information received from the central unit.
    Type: Application
    Filed: March 17, 2016
    Publication date: September 22, 2016
    Applicant: KT CORPORATION
    Inventors: Ki-Ho LEE, Byungsuk KIM, Seongkwan KIM, YongGyoo LEE
  • Publication number: 20160236443
    Abstract: The present invention relates to an optically transparent composite film for a display, comprising: a polymer substrate containing a transparent thermoplastic base resin; a plasma surface treatment layer formed on one surface of the polymer substrate and surface-modified through plasma treatment; an inorganic gas barrier layer formed on the upper surface of the plasma surface treatment layer; an organic-inorganic hybrid overcoating layer formed on the upper surface of the inorganic gas barrier layer and including a curable product of a curable sol solution; and an inorganic rear layer formed on the other surface of the polymer substrate.
    Type: Application
    Filed: October 8, 2013
    Publication date: August 18, 2016
    Inventors: Hee-Nam HWANG, Yong-Ho PARK, Sang-Sik YOON, Se-Won KIM, Ki-Ho LEE, Mi-Sook NAM
  • Patent number: 9403761
    Abstract: The present disclosure provides a compound represented by Formula (I) and a pharmaceutically acceptable salt which are effective as a dopamine reuptake inhibitor and a method of using the compound: wherein X is independently halo, alkyl, alkoxy or nitro; m is 0, 1, 2, 3 or 4; n is 1 or 2; R1 and R2 are independently H— or alkyl; R3 is H—, alkyl or aralkyl; and R4 is H— or aryl.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: August 2, 2016
    Assignee: SK BIOPHARMACEUTICALS CO., LTD.
    Inventors: Young-Soon Kang, Jin-Yong Chung, Cheol-Young Maeng, Han-Ju Yi, Ki-Ho Lee, Joon Heo, Eun-Hee Chae, Yu-Jin Shin
  • Publication number: 20160193215
    Abstract: The present invention relates to novel compounds as HIF-1? inhibitors, manufacturing process thereof, and a pharmaceutical compositions. The compounds according to the present invention having inhibition activity against HIF-1?, can be used as a therapeutic prevention and/or treatment for various solid cancers such as colon cancer, liver cancer, stomach cancer and breast cancer. Also, the compounds according to the present invention are useful in the treatment of diabetic retinopathy and rheumatoid arthritis, which are aggravated by HIF-1?-mediated VEGFA expression.
    Type: Application
    Filed: March 10, 2016
    Publication date: July 7, 2016
    Inventors: Kyeong LEE, Mi-Sun WON, Hwan-Mook KIM, Song-Kyu PARK, Ki-Ho LEE, Chang-Woo LEE, Bo-Kyung KIM, Hyun-Seung BAN, Kyung-Sook CHUNG, Naik RAVI
  • Patent number: 9369194
    Abstract: Described embodiments provide a method for processing an uplink signal in a radio unit. A first uplink signal may be received directly from user equipment. The received uplink signal may be delayed using uplink delay information. A second uplink signal may be received indirectly from user equipment through at least one repeater connected to the radio unit. The delayed first uplink signal and the second uplink signal may be combined and transmitted to a digital unit.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: June 14, 2016
    Assignee: KT CORPORATION
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji
  • Patent number: 9357505
    Abstract: Described embodiments provide a digital unit for controlling a plurality of radio units to transmit a signal to user equipment. The digital unit may determine whether user equipment is located at an overlapping service area of a first radio unit and a second radio unit and control the first radio unit to transmit a signal to the user equipment using the first antenna and control the second radio unit to transmit the same signal to the user equipment using the second antenna when the user equipment is located in the overlapping service area. A transmission pattern of the first antenna of the first radio unit may be different from a transmission pattern of the second antenna of the second radio unit.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 31, 2016
    Assignee: KT CORPORATION
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji
  • Patent number: 9315507
    Abstract: The present invention relates to novel compounds as HIF-1? inhibitors, manufacturing process thereof, and a pharmaceutical compositions. The compounds according to the present invention having inhibition activity against HIF-1?, can be used as a therapeutic prevention and/or treatment for various solid cancers such as colon cancer, liver cancer, stomach cancer and breast cancer. Also, the compounds according to the present invention are useful in the treatment of diabetic retinopathy and rheumatoid arthritis, which are aggravated by HIF-1?-mediated VEGFA expression.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: April 19, 2016
    Assignees: Dongguk University Industry-Academic Cooperation Foundation, Korea Research Institute of Bioscience and Biotechnology
    Inventors: Kyeong Lee, Mi-Sun Won, Hwan-Mook Kim, Song-Kyu Park, Ki-Ho Lee, Chang-Woo Lee, Bo-Kyung Kim, Hyun-Seung Ban, Kyung-Sook Chung, Naik Ravi
  • Patent number: 9288708
    Abstract: A system may deliver a push message to user equipment. The system may include a push notification server and a mobile communication core network. The push notification server may be configured to create and transmit a push message when a certain data is updated. The mobile communication core network may be configured to receive the push message from the push notification server, determine whether a user equipment associated with the push message is connected to a wireless local area network (WLAN) access network, and transmit the push message to the user equipment through at least one of a mobile communication radio access network and the WLAN access network based on the determination.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: March 15, 2016
    Assignee: KT CORPORATION
    Inventors: Ki-Ho Lee, Jong-Ho Park
  • Patent number: 9215614
    Abstract: The disclosure is related to controlling an operation bandwidth for a femtocell based on femtocell interference to a macrocell in order to minimize femtocell interference. A femtocell base station may include a measurement unit, a transmitting unit, and a control unit. The measurement unit may be configured to measure an interference amount of a macrocell adjacent to the femtocell base station. The transmitting unit may be configured to transmit the measured interference amount to a system. The control unit may be configured to i) accept an allocated operation bandwidth by the system and ii) control transmission and reception of signals with the allocated operation bandwidth. The operation bandwidth may be adjustable by the system based on the measured interference amount.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: December 15, 2015
    Assignee: KT CORPORATION
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji
  • Publication number: 20150350922
    Abstract: Cloud communication center system and method for processing data in a cloud communication system. An apparatus for supporting a cloud communication system may include at least one remote unit and a centralized unit. The at least one remote unit may be configured to process one of radio signals received from a user equipment or radio signals to be transmitted to a user equipment according to at least one sub-layer of an open system interconnection reference model. The centralized unit may be configured to receive the processed signal from the remote unit and to process the received signal based on the remaining sub-layers of the open system interconnection reference model.
    Type: Application
    Filed: August 10, 2015
    Publication date: December 3, 2015
    Applicant: KT CORPORATION
    Inventors: Ki-Ho LEE, Jong-Ho PARK
  • Patent number: 9172988
    Abstract: Provided is an analog front end of a digital TV, a digital TV system having the same, and a method of operating the same. The analog front end includes: a first selection circuit which selectively outputs differential sound intermediate frequency signals or differential TV broadcast signals in response to a first selection signal; a second selection circuit which outputs a clock signal among a plurality of clock signals having a different sampling frequencies, in response to a second selection signal; and an analog-to-digital converter which converts output signals output from the first selection circuit to a digital code, according to a sampling frequency of a clock signal output from the second selection circuit.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: October 27, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang Ho Kim, Ho Jin Park, Hyung Woan Koo, Ki Ho Lee
  • Publication number: 20150305036
    Abstract: A mobile communication system for providing carrier aggregation between digital units, and a method for processing a signal in the system are provided. The mobile communication system includes: a plurality of digital units connected to a core system and configured to process a radio digital signal; a blade server connected to at least two or more digital units and configured to perform resource allocation on signals processed by the connected digital units; and a plurality of radio units physically separated from the digital units, configured to convert and amplify digital signals received from the digital units, and transmit the same to a terminal, and configured to receive a signal transmitted from the terminal and transmit the received signal to the digital units. In the system, a mobile communication service is provided to the terminal by using carrier aggregation between radio units respectively connected to at least two or more digital units and using different frequencies.
    Type: Application
    Filed: September 2, 2013
    Publication date: October 22, 2015
    Applicant: KT CORPORATION
    Inventors: Ki-Ho LEE, Yong-Gyoo LEE, Yung-Ha JI
  • Publication number: 20150304881
    Abstract: Provided are a mobile communication system, a digital unit, and a method of establishing a joint transmission area in the system. When the digital unit determines that a terminal is located in a joint transmission area based on signal strength values received from two of radio units and transmission powers of the two radio units, the digital unit adjusts the joint transmission area depending on the load on the network including the two radio units belong in order to allow the two radio units to perform a joint transmission function to send at least one of the same signal and a spatiotemporally coded signal of the same data to the terminal.
    Type: Application
    Filed: September 2, 2013
    Publication date: October 22, 2015
    Applicant: KT CORPORATION
    Inventors: Ki-Ho LEE, Yong-Gyoo LEE, Yung-Ha JI
  • Publication number: 20150289278
    Abstract: A resource management apparatus for managing a plurality of base stations (BSs) includes a load information management unit configured to manage load information of the plurality of BSs, a neighbor BS list management unit configured to manage a neighbor BS list of each BS, and a resource allocation unit. The resource allocation unit is configured to vary quantity of resources allocated to a target BS from among the plurality of BSs based on load information of the target BS and at least one neighbor BS of the target BS, upon reception of a resource allocation request from the target BS.
    Type: Application
    Filed: July 26, 2013
    Publication date: October 8, 2015
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji
  • Publication number: 20150282164
    Abstract: The present disclosure relates to resource allocation method and apparatus. The resource allocation method includes monitoring resource information of a plurality of base stations including a first base station and a second base station, receiving a resource allocation request from a first terminal that is located in a boundary region and connected to the first base station, and checking whether a second terminal using a voice service is located in the boundary region. When the second terminal is located in the boundary region, resources are allocated to the first terminal based on resources allocated to the second terminal. The boundary region is an overlapped region of cells of the first base station and the second base station.
    Type: Application
    Filed: July 18, 2013
    Publication date: October 1, 2015
    Inventors: Ki-Ho Lee, Yong-Gyoo Lee, Yung-Ha Ji