Patents by Inventor Kyu Chung

Kyu Chung 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).

  • Apparatus and method for broadband wireless local area communication
    Patent number: 8792378
    Abstract: Provided is an apparatus and method for wideband short-range wireless communication using a directional antenna in a millimeter wave band, and the method for wideband short-range wireless communication according to an embodiment may determine a first time interval and a second time interval for a cooperated data frame transfer based on a packet transmission time at each transmission from a source node to a destination node, transmit a frame to a relay node through an antenna pattern directed towards the relay node at a start point of the first time interval, and transmit the frame to the destination node through an antenna pattern directed towards the destination node after a predetermined period of time from a start point of the second time interval.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: July 29, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok Chang, Hyoung Jin Kwon, Sung Geun Jin, Yong Sun Kim, Seung Eun Hong, Woo Yong Lee, Hyun Kyu Chung
  • Method and apparatus for contention-based channel access with directional antenna over wideband high frequency wireless system
    Patent number: 8780803
    Abstract: Provided are a method of performing contention based channel access by classifying a contention period into a beamformable contention period in which a beamforming is allowed and a non-beamformable contention period in which the beamforming is interrupted so as to resolve an issue regarding channel access occurring due to an introduction of a directional antenna for handling a path loss in a wideband wireless communication system according to an embodiment of the present invention, and a method for maximizing a spatial reuse gain by managing, for each direction, information about a transmission time of a message received from a dispersion device.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: July 15, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seung Eun Hong, Yong Sun Kim, Woo Yong Lee, Hyun Kyu Chung
  • Method and apparatus for transmitting/receiving multiple codewords in SC-FDMA system
    Patent number: 8761114
    Abstract: The present invention relates a method and apparatus for transmitting/receiving data using multiple codewords in a communication system using SC-FDMA (single carrier frequency division multiple access). A transmitter generates the multiple codewords for user data and transmits the generated multiple codewords. A receiver receives the multiple codewords and sequentially performs decoding and SIC (successive interference cancellation) on the received multiple codewords. Therefore, this structure can minimize a PAPR (peak to average power ratio) and considerably reduces interference between symbols in a frequency selective fading environment.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: June 24, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hee-Soo Lee, Bang-Won Seo, Hyun-Kyu Chung
  • Method and apparatus for allocating sequence to synchronization channel for node identification in wireless communication system
    Patent number: 8761111
    Abstract: Provided is an apparatus for allocating a sequence to a synchronization channel for a node identification (ID), the apparatus including: a base node sequence generator to generate a base sequence that is a sequence for a node ID of a base node; a relay node sequence generator to generate a relay sequence that is a sequence for a node ID of a relay node by transforming the base sequence; a baseband signal generator to generate a baseband signal by mapping the base sequence or the relay sequence to a frequency domain and a time domain; and a transmitter to transmit the baseband signal.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: June 24, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kapseok Chang, Young-Hoon Kim, Woo Yong Lee, Hyun Kyu Chung
  • Interference mitigation method in cellular system based on orthogonal frequency division multiple access
    Patent number: 8750885
    Abstract: An inter-cell interference mitigation method in an orthogonal frequency division multiple access (OFDM)-based cellular system includes: dividing wireless resources into a resource group for fractional frequency reuse and a resource group for removing inter-cell interference; and re-dividing the resource group for fractional frequency reuse into particular resource groups numbering the same as a number of cell types of fractional frequency reuse, and applying a maximum transmission power to a particular resource group according to a cell type for fractional frequency reuse.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: June 10, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae Young Ahn, Hyun Kyu Chung
  • Method and apparatus for allocating sequence to synchronization channel for node identification in wireless communication system
    Patent number: 8743796
    Abstract: Provided is an apparatus for allocating a sequence to a synchronization channel for a node identification (ID), the apparatus including: a base node sequence generator to generate a base sequence that is a sequence for a node ID of a base node; a relay node sequence generator to generate a relay sequence that is a sequence for a node ID of a relay node by transforming the base sequence; a baseband signal generator to generate a baseband signal by mapping the base sequence or the relay sequence to a frequency domain and a time domain; and a transmitter to transmit the baseband signal.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: June 3, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kapseok Chang, Young-Hoon Kim, Woo Yong Lee, Hyun Kyu Chung
  • Method for synchronizing clocks in a communication system
    Patent number: 8737433
    Abstract: A method for clock synchronization between higher layers using synchronization information provided from lower layers in multi-clock communication system in which the higher layers and the lower layers use heterogeneous clocks is provided.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: May 27, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hoo-Sung Lee, Woo-Yong Lee, Hyun-Kyu Chung
  • Apparatus for measuring radio relay channel and method thereof
    Patent number: 8731462
    Abstract: An apparatus and method for measuring radio relay channel are provided capable of easily measuring a radio relay channel on each radio link among a base station (BS), a relay station (RS) and a mobile station (MS) and providing a reliable result of measuring the characteristics of radio relay channel by controlling transmission/reception timing based on variation in operation time among the BS, the RS and the MS.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: May 20, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Myung-Don Kim, Heon-Kook Kwon, Jae-Joon Park, Byung-Jae Kwak, Hyun-Kyu Chung
  • Method for supporting idle mode in wireless local area network system
    Patent number: 8705488
    Abstract: Disclosed is a method for supporting an idle mode of a terminal in a wireless local area network (WLAN) system. In the method, a first request message for starting an idle mode is transmitted to a first access node to which the terminal is currently connected and a first response message with respect to the first request message is received from the first access node, and in this case, when the first response message includes acceptance information with respect to the start of the idle mode, the idle mode starts.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: April 22, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Geun Jin, Hyun Kyu Chung
  • System and method of allocating channels for multiple traffic streams
    Patent number: 8687574
    Abstract: Provided is a system and method that may allocate channels with respect to multiple traffic channels. A channel request apparatus may determine a correlation between traffic streams to which channels are allocated, and to determine whether the traffic streams are related to each other, may generate a channel allocation request message that simultaneously requests channel allocation with respect to related traffic streams that are related to each other, and may transmit the channel allocation request message to a channel response apparatus to request the channel allocation with respect to the related traffic channels.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: April 1, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yong Sun Kim, Seung Eun Hong, Kap Seok Chang, Sung Geun Jin, Woo Yong Lee, Hyun Kyu Chung
  • Method for reducing power consumption in wireless communication system
    Patent number: 8681673
    Abstract: A method for reducing power consumption in a wireless communication system includes: generating a descramble initial value by using at least some bits of identification information of an STA, which is known to an AP or base station and the STA; generating a first descramble sequence by using the generated descramble initial value and comparing at least some bits of the generated first descramble sequence with at least some bits of a service field of a currently-received signal; as the comparison result, when it is determined that the destination of the currently-received signal is not set to the STA, stopping the signal reception; and as the comparison result, when it is determined that the destination of the currently-received signal is set to the STA, generating a second descramble sequence by using the descramble initial value and descrambling the currently-received signal.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: March 25, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yu-Ro Lee, Jong-Ee Oh, Sok-Kyu Lee, Hyun-Kyu Chung
  • Terminal, method, and wireless communication for power saving
    Patent number: 8634780
    Abstract: Provided are a terminal for power saving, a power saving method of the terminal, and a wireless communication system for power saving. A receiving terminal may receive scheduling information associated with data transmission and reception of a transmitting terminal. The receiving terminal may directly communicate with the transmitting terminal by referring to the scheduling information.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: January 21, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Geun Jin, Hyoung Jin Kwon, Kap Seok Chang, Yong Sun Kim, Seung Eun Hong, Woo Yong Lee, Hyun Kyu Chung
  • SCHEDULING METHOD AND APPARATUS FOR SPATIAL REUSE
    Publication number: 20140010101
    Abstract: A scheduling method of giving a chance for transmission to a plurality of terminals in the same time period, and a device therefor are provided. The scheduling method includes: transmitting first scheduling information to terminals in a network, the first scheduling information defining transmitting/receiving terminals and a transmission time period; receiving channel measurement information including inter-terminal interference information from the terminals in the network; and generating second scheduling information defining transmission time periods and a plurality of transmitting/receiving terminals that do not interfere with each other by using the channel measurement information.
    Type: Application
    Filed: September 3, 2013
    Publication date: January 9, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung-Geun JIN, Jin Kyeong KIM, Woo Yong LEE, Hyun Kyu CHUNG
  • DATA TRANSMITTING METHOD FOR MACHINE TYPE COMMUNICATION (MTC) SERVICE AND COMMUNICATION APPARATUS USING THE SAME
    Publication number: 20140004895
    Abstract: Provided are a method for data transmission between a narrow band device and a wide band device, and a communication system using the method. A data transfer method for machine type communication (MTC) service, in which an MTC device transmits/receives data to/from a base station, includes: setting a frequency band allocated to the MTC device in a frequency band supported by the base station, to a transmission and reception frequency band; and transmitting/receiving data to/from the base station through the transmission and reception frequency band. Accordingly, since a base station supporting a wide band and an MTC device supporting a narrow band transmit/receive data through an allocated frequency band, effective data transmission and reception between the base station and the MTC device is possible.
    Type: Application
    Filed: May 29, 2013
    Publication date: January 2, 2014
    Inventors: Young Seog SONG, Moon Sik LEE, Jun Hwan LEE, Il Gyu KIM, Hyun Kyu CHUNG
  • Method and apparatus for supporting discontinuous operation of base station in wireless communication system and control system thereof
    Patent number: 8620375
    Abstract: An operation control method in a base station of a wireless communication system includes: checking whether or not an allowed mobile station exists in coverage of the base station and overall coverage of base stations adjacent to the base station; and controlling the base station to perform transmission/reception at a predetermined period through a first discontinuous operation, when the allowed mobile station does not exist in the coverage of the base station and the overall coverage of the adjacent base stations.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: December 31, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Tae-Joong Kim, Kwang-Chun Lee, Jae-Heung Kim, Hyun-Kyu Chung
  • Apparatus and method for transmitting/receiving data in communication system
    Patent number: 8615023
    Abstract: Disclosed is an apparatus and method for transmitting/receiving data using a low-density parity check (LDPC) coding scheme in a communication system. The method includes generating a multi-user data packet containing data to be transmitted to a plurality of users, encoding the multi-user data packet as a BCC and an LDPC code, and transmitting the encoded multi-user data packet to the plurality of users. In the method, the encoding of the multi-user data packet encodes MPDU subframes corresponding to each of the plurality of users in the multi-user data packet as the LDPC code, and calculates information on a length in LDPC encoding, corresponding to the encoding of the multi-user data packet as the LDPC code.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: December 24, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong-Ee Oh, Sok-Kyu Lee, Min-Ho Cheong, Jee-Yon Choi, Jae-Woo Park, Hyun-Kyu Chung
  • RF relay of full-duplex and method for removing interference of EM level thereof
    Patent number: 8606175
    Abstract: A RF relay of a full-duplex generates a conversion matrix to belong to a null space of a channel matrix of an interference channel, generates a transmitting signal by converting a received signal using the conversion matrix, and then outputs the transmitting signal to a transmitting antenna. Therefore, an interference signal of an electromagnetic wave level (EM level) that can be generated while the transmitting signal passes through the interference channel can be canceled.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: December 10, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Byung-Jae Kwak, Joon Ho Cho, Hyun Kyu Chung, Young Yun Kang
  • Apparatus and method for receiving/transmitting data in wireless communication system
    Patent number: 8599753
    Abstract: A data receiving apparatus includes a receiving unit configured to receive a beacon packet from at least one base station, a searching unit configured to search an index of a subchannel including an optimal channel state among subchannels allocated to a sector divided through spatial multiplexing based on the base station using the beacon packet, a calculating unit configured to calculate a final back off time by adding a slot time of the subchannel index and a random time, and a transmitting unit configured to include the searched subchannel index in a beacon response packet and transmit the beacon response packet after the calculated final back off time.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: December 3, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jung-Bo Son, Sok-Kyu Lee, Hyun-Kyu Chung
  • Monoclonal antibodies against ANGPTL4
    Patent number: 8591891
    Abstract: Monoclonal antibodies that specifically bind to ANGPTL4 are provided. Monoclonal antibodies that neutralize at least one activity of ANGPTL4 are provided. Methods of treating a disorder of lipid metabolism using neutralizing monoclonal antibodies are provided.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: November 26, 2013
    Assignee: Lexicon Pharmaceuticals, Inc.
    Inventors: E-Chiang Lee, Gregory M. Landes, Kyu Chung, Ling Chen, Urvi Desai, David Reed Powell, Seokjoo Hong
  • METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING MULTIPLE CODEWORDS IN SC-FDMA SYSTEM
    Publication number: 20130308657
    Abstract: The present invention relates a method and apparatus for transmitting/receiving data using multiple codewords in a communication system using SC-FDMA (single carrier frequency division multiple access). A transmitter generates the multiple codewords for user data and transmits the generated multiple codewords. A receiver receives the multiple codewords and sequentially performs decoding and SIC (successive interference cancellation) on the received multiple codewords. Therefore, this structure can minimize a PAPR (peak to average power ratio) and considerably reduces interference between symbols in a frequency selective fading environment.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 21, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hee-Soo LEE, Bang-Won SEO, Hyun-Kyu CHUNG