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).
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Patent number: 11178573Abstract: 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: GrantFiled: August 1, 2019Date of Patent: November 16, 2021Assignee: KT CORPORATIONInventors: Hasung Kim, Hyung-joon Song, Sung-Yeop Pyun
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Patent number: 10985830Abstract: 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: GrantFiled: March 6, 2018Date of Patent: April 20, 2021Assignee: KT CorporationInventor: Sung-Yeop Pyun
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Patent number: 10924176Abstract: 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: GrantFiled: July 12, 2017Date of Patent: February 16, 2021Assignee: KT CORPORATIONInventors: Sung-Yeop Pyun, Jong-Sik Lee, Won-Yeol Lee
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Patent number: 10812230Abstract: 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: GrantFiled: November 14, 2018Date of Patent: October 20, 2020Assignee: KT CORPORATIONInventors: Ha Sung Kim, Hyung-joon Song, Sung-Yeop Pyun
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Patent number: 10763950Abstract: 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: GrantFiled: July 7, 2017Date of Patent: September 1, 2020Assignee: KT CORPORATIONInventors: Sung-Yeop Pyun, Jong-Sik Lee, Won-Yeol Lee
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Publication number: 20200204249Abstract: 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: ApplicationFiled: March 6, 2018Publication date: June 25, 2020Applicant: KT CORPORATIONInventor: Sung-Yeop PYUN
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Publication number: 20200045583Abstract: 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: ApplicationFiled: August 1, 2019Publication date: February 6, 2020Applicant: KT CORPORATIONInventors: Hasung KIM, Hyung-joon SONG, Sung-Yeop PYUN
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Publication number: 20190379443Abstract: 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: ApplicationFiled: July 12, 2017Publication date: December 12, 2019Applicant: KT CORPORATIONInventors: Sung-Yeop PYUN, Jong-Sik LEE, Won-Yeol LEE
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Publication number: 20190253129Abstract: 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: ApplicationFiled: July 7, 2017Publication date: August 15, 2019Applicant: KT CORPORATIONInventors: Sung-Yeop PYUN, Jong-Sik LEE, Won-Yeol LEE
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Publication number: 20190229864Abstract: 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: ApplicationFiled: November 14, 2018Publication date: July 25, 2019Applicant: KT CORPORATIONInventors: Ha Sung KIM, Hyung-joon SONG, Sung-Yeop PYUN
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Patent number: 9924433Abstract: 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: GrantFiled: July 26, 2013Date of Patent: March 20, 2018Assignee: KT CORPORATIONInventors: Hyung-Jung Kim, Jong-Sik Lee, Sung-Yeop Pyun
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Patent number: 9648614Abstract: 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: GrantFiled: July 26, 2013Date of Patent: May 9, 2017Assignee: KT CORPORATIONInventors: Sung-Yeop Pyun, Hyung-Jung Kim, Do-Young Kwak, Jong-Sik Lee
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Publication number: 20150341839Abstract: 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: ApplicationFiled: July 26, 2013Publication date: November 26, 2015Applicant: KT CORPORATIONInventors: Hyung-Jung KIM, Jong-Sik LEE, Sung-Yeop PYUN
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Publication number: 20150327264Abstract: 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: ApplicationFiled: July 26, 2013Publication date: November 12, 2015Applicant: KT CORPORATIONInventors: Sung-Yeop PYUN, Hyung-Jung KIM, Do-Young KWAK, Jong-Sik LEE
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Patent number: 8457150Abstract: 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: GrantFiled: July 18, 2008Date of Patent: June 4, 2013Assignee: 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
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Patent number: 8149812Abstract: 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: GrantFiled: September 15, 2008Date of Patent: April 3, 2012Assignees: 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
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Publication number: 20110077013Abstract: 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: ApplicationFiled: February 24, 2009Publication date: March 31, 2011Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Dong Ho Cho, Sung Yeop Pyun, Chi Sung Bae, Soo Yong Jeon, Woong Sup Lee, Woo Chan Kim
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Publication number: 20090073952Abstract: 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: ApplicationFiled: September 15, 2008Publication date: March 19, 2009Inventors: Hong-Seok SHIN, Dong-Ho Cho, Hyu-Dae Kim, Chi-Sung Bae, Soo-Yong Jeon, Woo-Chan Kim, Sung-Yeop Pyun
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Publication number: 20090022112Abstract: 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: ApplicationFiled: July 18, 2008Publication date: January 22, 2009Inventors: Hong-Seok Shin, Dong-Ho Cho, Hyu-Dae Kim, Chi-Sung Bae, Soo-Yong Jeon, Woo-Chan Kim, Sung-Yeop Pyun