Patents by Inventor Chi-Woo Lim

Chi-Woo Lim 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: 10630422
    Abstract: A method and apparatus for channel encoding and channel decoding in a wireless communication system are provided. The channel encoding method includes generating a first parity set and a second parity set based on information bits, determining a number of additional parity bits based on a number of the information bits and a required coding rate, generating the determined number of additional parity bits using the information bits, and generating a codeword including the information bits, the first parity set, the second parity set, and the generated additional parity bits.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: April 21, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seok-Ki Ahn, Jae-Yoel Kim, Chi-Woo Lim, Min Jang, Kwang-Taik Kim, Woo-Myoung Park
  • Patent number: 10560216
    Abstract: Fifth Generation (5G) or pre-5G communication system for supporting a data transfer rate higher than that of a fourth Generation (4G) communication system, such as Long Term Evolution (LTE), and subsequent systems. The present disclosure provides a method for transmitting a signal by a transmission terminal in a communication system using a Low Density Parity Check (LDPC) code. The method include receiving a change request for changing a coding rate of the LDPC code, from a reception terminal; determining a first coding rate based on the change request; and transmitting information on the first coding rate in respond to the change request, to a reception terminal, wherein the change request for changing the coding rate comprises at least one of information indicating a coding rate determined by the reception terminal, or information indicating a state of the reception terminal.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: February 11, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-Woo Lim, Jae-Yoel Kim, Woo-Myoung Park, Seok-Ki Ahn, Min Jang
  • Patent number: 10542479
    Abstract: The present invention relates to a two-step search procedure for D2D communication. A method for D2D communication includes: obtaining a discovery code and a multicast identifier to be used for transmitting additional information on an application program through a D2D multicast subframe, based on an identifier of an application program of a device; and broadcasting the discovery code and the multicast identifier in a discovery subframe.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: January 21, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung-Hoon Park, Hyun-Seok Ryu, Anil Agiwal, Young-Bin Chang, Kyung-Kyu Kim, Sang-Kyu Baek, Chi-Woo Lim
  • Patent number: 10531431
    Abstract: A method for allocating resources in Device-to-Device (D2D) communication in a wireless network is provided. The method includes requesting, by a device, resource allocation from an enhanced Node B (eNB) and causing the device to be allocated, from the eNB, a Resource Block (RB) for transmitting one of D2D discovery and communication data and control information. The RB includes information about a location of the resource-allocated time or frequency.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: January 7, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Seok Ryu, Seung-Hoon Park, Chi-Woo Lim
  • Patent number: 10511060
    Abstract: A 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long term evolution (LTE) is disclosed. The present disclosure relates to a rate compatible low-density parity-check (RC-LDPC) encoding method and device therefor. The encoding method includes using LDPC in a communication system, including the operations of LDPC encoding information bits by a first encoding rate, and performing a concatenated single parity check (SPC) encoding for the encoded bits by at least one second encoding rate lower than the first encoding rate.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: December 17, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Jang, Seok-Ki Ahn, Chi-Woo Lim, Jae-Yoel Kim, Woo-Myoung Park
  • Patent number: 10454618
    Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method and apparatus for transmitting a signal in a transmitting apparatus in a communication system supporting a rate compatible-low density parity check (RC-LDPC) code are provided. The method includes encoding information bits based on a first parity check matrix and a first code rate to generate a codeword, processing the codeword to generate a transmission signal, and transmitting the transmission signal.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: October 22, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Jang, Seok-Ki Ahn, Chi-Woo Lim, Jae-Yoel Kim, Woo-Myoung Park
  • Publication number: 20190297626
    Abstract: An apparatus and a method for operating a mobile station in a wireless communication system are provided. The method includes receiving first information transmitted on a secondary carrier from a base station, and transmitting second information for feedback related to the secondary carrier at a feedback region in a primary carrier based on the first information to the base station.
    Type: Application
    Filed: June 12, 2019
    Publication date: September 26, 2019
    Inventors: Hyun-Jeong KANG, Chi-Woo LIM, Jae-Weon CHO, Tae-Young KIM
  • Patent number: 10375715
    Abstract: A method for performing scheduling by a first base station over a wireless communication network, and an apparatus therfor are provided. The method includes receiving first channel status information (CSI) measured by at least one user equipment (UE) positioned in coverage of the first base station and second CSI, determining a first transmission rate for any one of the at least one UE positioned in the coverage of the first base station and a second transmission rate for any one of the at least one UE positioned in the coverage of the second base station, determining a third transmission rate for a first UE among the at least one UE positioned in the coverage of the first base station and a fourth transmission rate for a second UE among the at least one UE positioned in the coverage of the second base station, and performing scheduling.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: August 6, 2019
    Assignees: Samsung Electronics Co., Ltd., THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Seok-Ki Ahn, Kwang-Taik Kim, Young-Han Kim, Yong-Seok Kim, Chi-Woo Lim
  • Patent number: 10356771
    Abstract: A 5th-generation (5G) or pre-5G communication system which is to support a higher data transfer rate beyond a 4G communication system such as a long term evolution (LTE) is provided. The method for transmitting a downlink signal by a base station in a wireless communication system supporting non-orthogonal multiple access (NOMA) includes the steps of selecting a pair of terminals including one short-distance terminal and at least one long-distance terminal which will share an identical downlink transmission resource, generating a superimposed signal in which a signal for the short-distance terminal and a signal for the long-distance terminal are superimposed on one another, generating information necessary for cancelling the signal of the long-distance terminal from the superimposed signal, transmitting the generated information necessary for cancelling the signal of the long-distance terminal to the short-distance terminal, and transmitting the generated superimposed signal to the pair of terminals.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: July 16, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-Woo Lim, Woo-Myoung Park
  • Patent number: 10327245
    Abstract: An apparatus and a method for operating a mobile station in a wireless communication system are provided. The method includes receiving first information transmitted on a secondary carrier from a base station, and transmitting second information for feedback related to the secondary carrier at a feedback region in a primary carrier based on the first information to the base station.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: June 18, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Jeong Kang, Chi-Woo Lim, Jae-Weon Cho, Tae-Young Kim
  • Publication number: 20190182906
    Abstract: The present invention relates to a wet planar heating element and a method manufacturing the same. The element including: a planar heating unit including an upper waterproof film layer, a lower waterproof film layer, a planar heating layer, and an electrode layer; an external waterproof film layer; and a non-woven fabric layer. According to the present invention, it is possible to minimize leakage current due to pores of a non-woven fabric substrate and a low dielectric constant of air in air pockets, thereby solving problems that an earth leakage circuit breaker operates. Accordingly, wet construction can be performed, power consumption can be reduced, and an electrical fire risk can be remarkably lowered. In addition, it is possible to improve flexibility of the planar heating element, whereby the use of the planar heating element can be expanded and the efficiency of the construction work can be increased.
    Type: Application
    Filed: May 19, 2017
    Publication date: June 13, 2019
    Applicant: NDT ENGINEERING & AEROSPACE CO., LTD.
    Inventors: Ki-Hyun Lim, Chi-Woo Noh
  • Publication number: 20190164552
    Abstract: A speech recognition device is provided. The speech recognition device includes at least one microphone configured to receive a sound signal from a first sound source, and at least one processor configured to determine a direction of the first sound source based on the sound signal, determine whether the direction of the first sound source is in a registered direction, and based on whether the direction of the first sound source is in the registered direction, recognize a speech from the sound signal regardless of whether the sound signal comprises a wake-up keyword.
    Type: Application
    Filed: November 28, 2018
    Publication date: May 30, 2019
    Inventors: Hyeon-taek LIM, Sang-yoon KIM, Kyung-min LEE, Chang-woo HAN, Nam-hoon KIM, Jong-youb RYU, Chi-youn PARK, Jae-won LEE
  • Patent number: 10305710
    Abstract: The present invention relates to a method for operating, by a base station, multiple modulation schemes in a wireless communication system, the method comprising the steps of: calculating the number of terminals, among the terminals in a cell managed by the base station, of which a channel state is included in a state that is lower than a preset state; reporting information related to the calculated number of terminals to an upstream entity of the base station; receiving information about a band, assigned by the upstream entity, for a hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) scheme on the basis of a QAM scheme and a FSK scheme; and transmitting downwardly the information about the band for the FQAM scheme to the terminals of which a channel state is included in a state that is lower than the preset state. Other modified embodiments on the basis of the technical concept of the present invention are also possible.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 28, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Sagong, Jeong-Ho Park, Jae-Won Kim, Hyun-Kyu Yu, Chi-Woo Lim, Su-Ryong Jeong, Sung-Nam Hong
  • Patent number: 10292172
    Abstract: A method and an apparatus for transmitting a packet in a system performing a Device to Device (D2D) direct communication are provided. In the method, whether to transmit a small packet is determined. When small packet transmission is determined, at least one peripheral reception device is informed of whether the small packet is transmitted at a scheduling point.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: May 14, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chi-Woo Lim, Kyung-Kyu Kim, Dae-Gyun Kim, Seung-Hoon Park
  • Patent number: 10277449
    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Provided is an operation method of a base station in a wireless communication system. The method comprises: receiving, from a terminal, at least one piece of information among channel quality information on a resource region allocated to the terminal and non-Gaussian information on a nulling region corresponding to the resource region; and determining a modulation order for the terminal, a code rate, a ratio of the resource region to the nulling region based on the channel quality information and the non-Gaussian information.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: April 30, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Nam Hong, Min Sagong, Chi-Woo Lim
  • Patent number: 10271337
    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present invention relates to method and apparatus for performing a decoding with low complexity in a wireless communication system. A decoding method of a terminal in a wireless communication system comprises determining a first characteristic value indicating a statistical characteristic of an interference signal based on a received signal of a base station, determining a second characteristic value indicating a statistical characteristic of an interference signal based on data received from the base station, and decoding the data according to a decoding scheme corresponding to a difference of the first characteristic value and the second characteristic value.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: April 23, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Sagong, Woo-Myoung Park, Seok-Ki Ahn, Chi-Woo Lim, Sung-Nam Hong
  • Patent number: 10243695
    Abstract: The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method includes decoding a codeword corresponding to a preset decoding scheme to detect reliability information of each of codeword bits included in the codeword, wherein at least one of a number of quantization bits and a range of a quantization level used for detecting reliability information in the decoding scheme is determined based on a degree of a node on a bipartite graph of a low density parity check (LDPC) code.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: March 26, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Jang, Kyung-Joong Kim, Jae-Yoel Kim, Seho Myung, Seok-Ki Ahn, Chi-Woo Lim, Hong-Sil Jeong
  • Patent number: 10237112
    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Provided is an operation method of a base station in a wireless communication system. The method comprises: receiving, from a terminal, at least one piece of information among channel quality information on a resource region allocated to the terminal and non-Gaussian information on a nulling region corresponding to the resource region; and determining a modulation order for the terminal, a code rate, a ratio of the resource region to the nulling region based on the channel quality information and the non-Gaussian information.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: March 19, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Nam Hong, Min Sagong, Chi-Woo Lim
  • Patent number: 10205468
    Abstract: Provided is a method for decoding a non-binary (NB) low density parity check (LDPC) code at a user equipment (UE) that implements at least one variable nodes that receive a received signal of a wireless channel and deliver an input message to a check node and the check node that checks the input message and outputs an output message. The method includes receiving at least one input messages, generating a temporary vector by using the at least one input messages, searching for an element having a dominant value by checking the temporary vector, generating a configuration set, which is a check target, by using the element having the dominant value, and generating the output message by performing comparison with respect to the generated configuration set.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: February 12, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seok-Ki Ahn, Kyeong-Cheol Yang, Sang-Min Kim, Woo-Myoung Park, Min Sagong, Chi-Woo Lim, Sung-Nam Hong
  • Patent number: 10182429
    Abstract: Disclosed is a method and apparatus for transmitting information in a communication system. The present invention relates to a millimeter wave beamforming-based 5G or pre-5G wireless communication system for supporting a higher data rate beyond a 4G network or LTE system.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: January 15, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang-Taik Kim, Seok-Ki Ahn, Jeong-Ho Park, Chi-Woo Lim, Jae-Weon Cho