Patents by Inventor Sung-Yeop Pyun

Sung-Yeop Pyun 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: 10985830
    Abstract: A radio relay apparatus and an operating method therefor are provided. The radio relay apparatus that relays a communication signal between a base station and a terminal includes a donor unit that transmits and receives a radio frequency signal to and from the base station, and at least one service unit that transmits and receives an analog transmission signal to and from the donor unit, and transmits and receives the radio frequency signal to and from the terminal. In the analog transmission signal, an intermediate frequency signal into which the radio frequency signal is converted and a time synchronization signal extracted from the intermediate frequency signal are combined. The time synchronization signal is used by the donor unit and the at least one service unit for time division duplex communication (TDD) synchronization control.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: April 20, 2021
    Assignee: KT Corporation
    Inventor: Sung-Yeop Pyun
  • Patent number: 10924176
    Abstract: Provided are a next generation in-building relay system and method. The system includes: a 5G signal providing unit configured to down-convert a millimeter wave radio frequency signal to an intermediate frequency signal; a 5G master hub unit configured to convert the intermediate frequency signal into a radio over fiber (RoF) signal and transmit the RoF signal; an optical coupling unit configured to couple a digital optical signal output from a master hub unit and the analog optical signal output from the 5G master hub unit and transmit the coupled signal to an optical cable; and an optical distribution unit configured to separate the digital optical signal and the analog optical signal from the coupled signal, transmit the digital optical signal to a remote optical relay unit, and transmit the analog optical signal to distributed remote units.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: February 16, 2021
    Assignee: KT CORPORATION
    Inventors: Sung-Yeop Pyun, Jong-Sik Lee, Won-Yeol Lee
  • Patent number: 10812230
    Abstract: Provided are technologies for data transmission and reception using an interworking interface between heterogeneous radio access network base stations, such as between NR and LTE, for a 5G non-standalone (NSA) network. A base station for controlling downlink data transmission may include a controller configured to setting up an X2 interface for transmitting the downlink data to a UE by interworking with another base station, a transmitter configured to transmit downlink use data information including information indicating whether to perform retransmission of an associated downlink data packet to another base station through the X2 interface, and a receiver configured to receive downlink data transfer status information from another base station through the X2 interface.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: October 20, 2020
    Assignee: KT CORPORATION
    Inventors: Ha Sung Kim, Hyung-joon Song, Sung-Yeop Pyun
  • Patent number: 10763950
    Abstract: Provided are a 5G in-building relay system and a 5G in-building relay method for sharing an RF cable to provide a 5G communication service in the building. The 5G in-building relay system includes: a 5G signal providing device for converting RF signals of a 5G into IF signals and providing the IF signals through a pre-built RF cable of the building; an MHU for receiving and transmitting the IF signals; a coupling device for combining the IF signals with radio signals other than the 5G received from an ROU pre-built in the building and providing the combined signals through the RF cable; a distribution device for receiving the combined signals and separating and distributing the IF signals of the 5G from the combined signals; and a DRU for converting the distributed IF signals into millimeter-wave RF signals and wirelessly transmitting the RF signals to a 5G terminal.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: September 1, 2020
    Assignee: KT CORPORATION
    Inventors: Sung-Yeop Pyun, Jong-Sik Lee, Won-Yeol Lee
  • Publication number: 20200204249
    Abstract: A radio relay apparatus and an operating method therefor are provided. The radio relay apparatus that relays a communication signal between a base station and a terminal includes a donor unit that transmits and receives a radio frequency signal to and from the base station, and at least one service unit that transmits and receives an analog transmission signal to and from the donor unit, and transmits and receives the radio frequency signal to and from the terminal. In the analog transmission signal, an intermediate frequency signal into which the radio frequency signal is converted and a time synchronization signal extracted from the intermediate frequency signal are combined. The time synchronization signal is used by the donor unit and the at least one service unit for time division duplex communication (TDD) synchronization control.
    Type: Application
    Filed: March 6, 2018
    Publication date: June 25, 2020
    Applicant: KT CORPORATION
    Inventor: Sung-Yeop PYUN
  • Publication number: 20200045583
    Abstract: Provided are apparatuses and methods of managing a load of a base station node in fifth generation (5G) networks. The method of a master base station for managing a load of a secondary base station may include establishing dual connectivity with the secondary base station, receiving a secondary base station status indication message from the secondary base station through an X2 interface, and determining whether to apply an action for reducing a load of the secondary base station based on a value of a secondary base station load information parameter included in the secondary base station status indication message.
    Type: Application
    Filed: August 1, 2019
    Publication date: February 6, 2020
    Applicant: KT CORPORATION
    Inventors: Hasung KIM, Hyung-joon SONG, Sung-Yeop PYUN
  • Publication number: 20190379443
    Abstract: Provided are a next generation in-building relay system and method. The system includes: a 5G signal providing unit configured to down-convert a millimeter wave radio frequency signal to an intermediate frequency signal; a 5G master hub unit configured to convert the intermediate frequency signal into a radio over fiber (RoF) signal and transmit the RoF signal; an optical coupling unit configured to couple a digital optical signal output from a master hub unit and the analog optical signal output from the 5G master hub unit and transmit the coupled signal to an optical cable; and an optical distribution unit configured to separate the digital optical signal and the analog optical signal from the coupled signal, transmit the digital optical signal to a remote optical relay unit, and transmit the analog optical signal to distributed remote units.
    Type: Application
    Filed: July 12, 2017
    Publication date: December 12, 2019
    Applicant: KT CORPORATION
    Inventors: Sung-Yeop PYUN, Jong-Sik LEE, Won-Yeol LEE
  • Publication number: 20190253129
    Abstract: Provided are a 5G in-building relay system and a 5G in-building relay method for sharing an RF cable to provide a 5G communication service in the building. The 5G in-building relay system includes: a 5G signal providing device for converting RF signals of a 5G into IF signals and providing the IF signals through a pre-built RF cable of the building; an MHU for receiving and transmitting the IF signals; a coupling device for combining the IF signals with radio signals other than the 5G received from an ROU pre-built in the building and providing the combined signals through the RF cable; a distribution device for receiving the combined signals and separating and distributing the IF signals of the 5G from the combined signals; and a DRU for converting the distributed IF signals into millimeter-wave RF signals and wirelessly transmitting the RF signals to a 5G terminal.
    Type: Application
    Filed: July 7, 2017
    Publication date: August 15, 2019
    Applicant: KT CORPORATION
    Inventors: Sung-Yeop PYUN, Jong-Sik LEE, Won-Yeol LEE
  • Publication number: 20190229864
    Abstract: Provided are technologies for data transmission and reception using an interworking interface between heterogeneous radio access network base stations, such as between NR and LTE, for a 5G non-standalone (NSA) network. A base station for controlling downlink data transmission may include a controller configured to setting up an X2 interface for transmitting the downlink data to a UE by interworking with another base station, a transmitter configured to transmit downlink use data information including information indicating whether to perform retransmission of an associated downlink data packet to another base station through the X2 interface, and a receiver configured to receive downlink data transfer status information from another base station through the X2 interface.
    Type: Application
    Filed: November 14, 2018
    Publication date: July 25, 2019
    Applicant: KT CORPORATION
    Inventors: Ha Sung KIM, Hyung-joon SONG, Sung-Yeop PYUN
  • Patent number: 9924433
    Abstract: A hub apparatus may be provided for distributing a load of a small cell digital unit to a macro cell digital unit in a heterogeneous network.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: March 20, 2018
    Assignee: KT CORPORATION
    Inventors: Hyung-Jung Kim, Jong-Sik Lee, Sung-Yeop Pyun
  • Patent number: 9648614
    Abstract: A wired/wireless convergence apparatus may be provided for integrally transmitting wired network traffic and wireless network traffic in an in-building cloud network composed of a plurality of digital units and a plurality of radio units includes. The wired/wireless convergence apparatus may include a traffic monitoring unit and a wired/wireless traffic control unit. The traffic monitoring unit may be configured to monitor wireless network traffic and wired network traffic input to the in-building cloud network. The wired/wireless traffic control unit may be configured to allocate wireless network traffic resources to optical fibers on the basis of monitored information of the traffic monitoring unit and to allocate wired network traffic to idle resources remaining after allocation of the wireless network traffic.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: May 9, 2017
    Assignee: KT CORPORATION
    Inventors: Sung-Yeop Pyun, Hyung-Jung Kim, Do-Young Kwak, Jong-Sik Lee
  • Publication number: 20150341839
    Abstract: A hub apparatus may be provided for distributing a load of a small cell digital unit to a macro cell digital unit in a heterogeneous network.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 26, 2015
    Applicant: KT CORPORATION
    Inventors: Hyung-Jung KIM, Jong-Sik LEE, Sung-Yeop PYUN
  • Publication number: 20150327264
    Abstract: A wired/wireless convergence apparatus may be provided for integrally transmitting wired network traffic and wireless network traffic in an in-building cloud network composed of a plurality of digital units and a plurality of radio units includes. The wired/wireless convergence apparatus may include a traffic monitoring unit and a wired/wireless traffic control unit. The traffic monitoring unit may be configured to monitor wireless network traffic and wired network traffic input to the in-building cloud network. The wired/wireless traffic control unit may be configured to allocate wireless network traffic resources to optical fibers on the basis of monitored information of the traffic monitoring unit and to allocate wired network traffic to idle resources remaining after allocation of the wireless network traffic.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 12, 2015
    Applicant: KT CORPORATION
    Inventors: Sung-Yeop PYUN, Hyung-Jung KIM, Do-Young KWAK, Jong-Sik LEE
  • Patent number: 8457150
    Abstract: A method and apparatus for notifying status of an MN in a WLAN system using VLC are provided, in which an AP allocates a first predetermined number of time slots per frame as unallocated slots, for status notification of an initially accessing MN and allocates a second predetermined number of time slots per frame as reserved slots, for status notification of an initially accessing MN and uplink data transmission of an MN, and the MN transmits a visible light signal carrying status information about the MN in one of an unallocated slot and a reserved slot, if the MN initially accesses the AP.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: June 4, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong-Seok Shin, Dong-Ho Cho, Hyu-Dae Kim, Chi-Sung Bae, Soo-Yong Jeon, Woo-Chan Kim, Sung-Yeop Pyun
  • Patent number: 8149812
    Abstract: A method for retransmitting data when data transmission/reception has failed in a wireless LAN system using visible light communication. A mobile node searches a received frame for a fast feedback slot allocated for retransmission information when momentary data transmission/reception failure has occurred. One mini-slot from among the plurality of mini-slots is selected from the fast feedback slot. The mobile node transmits a fast feedback message, including information for retransmission, to an access point by using the selected mini-slot.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: April 3, 2012
    Assignees: Samsumg Electronics Co., Ltd., Korea Advanced Institute of Science & Technology (Kaist)
    Inventors: Hong-Seok Shin, Dong-Ho Cho, Hyu-Dae Kim, Chi-Sung Bae, Soo-Yong Jeon, Woo-Chan Kim, Sung-Yeop Pyun
  • Publication number: 20110077013
    Abstract: Disclosed herein are a method of communicating and establishing a relay channel between a base station and a non-line-of-sight channel terminal in a next generation cellular communication system.
    Type: Application
    Filed: February 24, 2009
    Publication date: March 31, 2011
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dong Ho Cho, Sung Yeop Pyun, Chi Sung Bae, Soo Yong Jeon, Woong Sup Lee, Woo Chan Kim
  • Publication number: 20090073952
    Abstract: A method for retransmitting data when data transmission/reception has failed in a wireless LAN system using visible light communication. A mobile node searches a received frame for a fast feedback slot allocated for retransmission information when momentary data transmission/reception failure has occurred. One mini-slot from among the plurality of mini-slots is selected from the fast feedback slot. The mobile node transmits a fast feedback message, including information for retransmission, to an access point by using the selected mini-slot.
    Type: Application
    Filed: September 15, 2008
    Publication date: March 19, 2009
    Inventors: Hong-Seok SHIN, Dong-Ho Cho, Hyu-Dae Kim, Chi-Sung Bae, Soo-Yong Jeon, Woo-Chan Kim, Sung-Yeop Pyun
  • Publication number: 20090022112
    Abstract: A method and apparatus for notifying status of an MN in a WLAN system using VLC are provided, in which an AP allocates a first predetermined number of time slots per frame as unallocated slots, for status notification of an initially accessing MN and allocates a second predetermined number of time slots per frame as reserved slots, for status notification of an initially accessing MN and uplink data transmission of an MN, and the MN transmits a visible light signal carrying status information about the MN in one of an unallocated slot and a reserved slot, if the MN initially accesses the AP.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 22, 2009
    Inventors: Hong-Seok Shin, Dong-Ho Cho, Hyu-Dae Kim, Chi-Sung Bae, Soo-Yong Jeon, Woo-Chan Kim, Sung-Yeop Pyun