Patents by Inventor Woo-Jin Choi

Woo-Jin Choi 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: 10531326
    Abstract: Provided are a method and apparatus for efficiently controlling carrier aggregation of a terminal in a network using LTE or a next generation radio access technology. The method of the terminal may include receiving IDLE mode measurement configuration information for measuring a channel state in an RRC IDLE mode from a base station, performing at least one of storing and applying the IDLE mode measurement configuration information, and transmitting IDLE mode measurement result information measured in the RRC IDLE mode based on the IDLE mode measurement configuration information to the base station.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: January 7, 2020
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Patent number: 10531442
    Abstract: Provided are a method for transmitting and receiving an uplink data channel (Physical Uplink Shared Channel, PUSCH) for a Machine Type Communication (MTC) terminal in a 3GPP LTE/LTE-A system. The method for transmitting an uplink data channel (PUSCH) by an MTC terminal, may include receiving information relating to uplink data channel resource allocation in units of sub-Physical Resource Blocks (sub-PRBs) from a base station; and transmitting an uplink data channel on the basis of the information relating to uplink data channel resource allocation to the base station.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: January 7, 2020
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Patent number: 10524189
    Abstract: Disclosed is a technique for an access control operation of a user equipment (UE) in a next-generation mobile communication network, and more specifically, a unified access control method for a UE and a specific access control method for a service with low sensitivity. Further, a method of a UE is provided for performing an access control operation. The method may include receiving operator-defined access category information through non-access stratum (NAS) signaling when an access attempt of the UE is triggered, determining one access category for the access attempt in an NAS layer or an access stratum (AS) layer; selecting RRC establishment cause information associated with the access category; and performing an access barring check operation in the AS layer using access barring parameters associated with the access category.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: December 31, 2019
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Publication number: 20190394768
    Abstract: Provided are a method and an apparatus for transmitting, by a terminal, channel state information (CSI) in a frame structure of a short transmission time interval (sTTI).
    Type: Application
    Filed: September 22, 2017
    Publication date: December 26, 2019
    Applicant: KT CORPORATION
    Inventors: Ki-tae KIM, Woo-jin CHOI
  • Publication number: 20190393995
    Abstract: Provided area a method for establishing downlink (DL) HARQ-ACK timing, and an apparatus therefor. The method establishes downlink HARQ-ACK timing when a primary cell and a secondary cell having different duplex modes are established for a user equipment. The user equipment receives a DL signal on the secondary cell. The user equipment applies HARQ-ACK timing established to be used in the duplex mode of the primary cell as HARQ-ACK timing regarding the received downlink signal.
    Type: Application
    Filed: August 16, 2019
    Publication date: December 26, 2019
    Applicant: KT CORPORATION
    Inventors: Minseok NOH, Woo-jin CHOI
  • Publication number: 20190394751
    Abstract: Provided are a method and an apparatus for transmitting or receiving a downlink control channel in a next generation/5G wireless access network. The method includes receiving configuration information relating to a common search space (CSS) from a base station and receiving, through the common search space, a downlink control channel including information for scheduling remaining minimum system information (RMSI), wherein the configuration information is included in a master information block (MIB) received through a physical broadcast channel and is received from the base station.
    Type: Application
    Filed: January 5, 2018
    Publication date: December 26, 2019
    Applicant: KT CORPORATION
    Inventors: Kyujin PARK, Woo-jin CHOI
  • Patent number: 10517074
    Abstract: Methods may be provided for allocating up/downlink data channel (that is, PDSCH and PUSCH) resource for a machine type communication (MTC) terminal in 3GPP LTE/LTE advanced system and for configuring a Downlink Control Information (DCI) for it. Further, a method may be provided for allocating up/downlink data channel resource for further enhanced MTC terminal which supports a up/downlink data channel (that is, PDSCH and PUSCH) bandwidth enhanced as compared with the MTC terminal (BL/CE UE) defined in LTE rel-13.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: December 24, 2019
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Publication number: 20190386779
    Abstract: Provided is a method for a user equipment to duplicately receive an identical control messages. The method includes duplicately receiving identical control messages from a base station and processing the duplicately received identical control messages by mapping same to mutually different logical channels, by using identification information or an identification entity for identifying and processing the duplicately received identical control message.
    Type: Application
    Filed: March 7, 2018
    Publication date: December 19, 2019
    Applicant: KT CORPORATION
    Inventors: Sung-pyo HONG, Woo-jin CHOI
  • Patent number: 10511994
    Abstract: Provided are a method and apparatus for efficiently transmitting a buffer status report for a plurality of logical channel groups (LCG) from a terminal to a base station. The method may include receiving allocation information for uplink resources from a base station; determining whether the number of padding bits for data transmission using the uplink resources is i) greater than or equal to a first value and ii) less than a second value; determining whether available data for uplink transmission is present in one or more logical channel groups (LCGs) when the number of padding bits is greater than or equal to the first value and is less than the second value; and transmitting Short Truncated BSR or Long Truncated BSR to the base station according to a result of comparison between the number of padding bits and the first value when available data for uplink transmission is present in the one or more LCGs.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: December 17, 2019
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Patent number: 10511941
    Abstract: A method may be provided for receiving multicast data by an IoT terminal requiring a low power and a low cost and an apparatus thereof. The method of a terminal may include starting a single cell-point to multipoint (SC-PTM) onduration timer through a MAC when discontinuous reception (DRX) is configured for a group-radio network temporary identifier (G-RNTI); monitoring a physical downlink control channel (PDCCH) during an active time; controlling at least one of the SC-PTM onduration timer and the SC-PTM inactivity timer when the PDCCH includes information indicating downlink transmission; and repeatedly receiving the multicast data through a physical downlink shared channel (PDSCH) of one or more subframes and an apparatus thereof.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: December 17, 2019
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Patent number: 10506659
    Abstract: Provided are a method and an apparatus for processing a Radio Link Failure (RLF) when duplicate data transmission is performed via single-BS-based CA. The method of processing an RLF by a user equipment (UE) may include: receiving, from a Base Station (BS), higher layer signaling including information for configuring duplicate data transmission via single BS-based CA; configuring a logical channel restricted to one or more secondary cells and a Radio Link Control (RLC) entity for duplicate transmission, based on the higher layer signaling; and transmitting, to the BS, a secondary cell failure report without performing RRC re-establishment procedure, when an RLF occurs in the RLC entity.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: December 10, 2019
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Patent number: 10506630
    Abstract: Provided are a method and an apparatus for scheduling a downlink data channel (PDSCH) or an uplink data channel (PUSCH). The method of a user equipment may be provided for scheduling a downlink data channel (PDSCH) or an uplink data channel (PUSCH) by a user equipment.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: December 10, 2019
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Publication number: 20190357001
    Abstract: Disclosed are a method and an apparatus for configuring a system information transmission resource for an MTC terminal. The method may include configuring a system bandwidth including two or more physical resource blocks with one or more subbands defined by two or more physical resource blocks to enable at least one remaining physical resource block to be located in a center of the system bandwidth and transmitting the system information to a predetermined user equipment (UE) using the subband.
    Type: Application
    Filed: May 14, 2019
    Publication date: November 21, 2019
    Applicant: KT CORPORATION
    Inventors: Seunghyun KANG, Woo-jin CHOI
  • Publication number: 20190357109
    Abstract: Provided are a method and an apparatus for a NarrowBand-Internet of Things (NB-IoT) terminal to perform a mobility process. The method may include: transmitting an RRC connection re-establishment request message to a base station when a pre-set event occurs; receiving an RRC connection re-establishment message from the base station; and resuming a signaling radio bearer on the basis of the RRC connection re-establishment message.
    Type: Application
    Filed: July 20, 2017
    Publication date: November 21, 2019
    Applicant: KT CORPORATION
    Inventors: Sung-pyo HONG, Woo-jin CHOI
  • Publication number: 20190357119
    Abstract: An access control technology in a next generation mobile communication network is disclosed. More specifically, disclosed is a technology for controlling an access control operation of a terminal through an integrated category by various methods and layers. One embodiment provides a method by which a terminal performs integrated access control, comprising the steps of: receiving, from a base station, system information including information for access control; indicating access category information from an NAS layer to an AS layer of the terminal when an access attempt is triggered; confirming whether access barring parameter information is included in the system information; and controlling an access barring check operation in the AS layer by using at least one of the access category information and the access barring parameter information.
    Type: Application
    Filed: January 29, 2018
    Publication date: November 21, 2019
    Applicant: KT CORPORATION
    Inventors: Sung-pyo HONG, Woo-jin CHOI
  • Publication number: 20190357212
    Abstract: The present disclosure relates to a method and an apparatus for uplink data scheduling of a cell using an unlicensed spectrum. The method may include configuring carrier aggregation including a secondary cell (SCell) using an unlicensed spectrum, receiving downlink control information including subframe allocation information for transmitting uplink data in the secondary cell from a base station, and transmitting the uplink data through a plurality of consecutive subframes based on the subframe allocation information.
    Type: Application
    Filed: August 2, 2019
    Publication date: November 21, 2019
    Applicant: KT CORPORATION
    Inventors: Kyujin PARK, Woo-jin CHOI
  • Patent number: 10485042
    Abstract: Provided are a method and a device for configuring or reconfiguring a wireless data bearer for transmitting user plane data. The method may include: receiving, from a base station, an upper layer signaling including information for changing a data wireless bearer type for a specific wireless bearer configured to receive downlink data by using only a WLAN wireless resource; performing a packet data convergence protocol (PDCP) data recovery procedure in a PDCP entity on the basis of the information for changing the data wireless bearer type for the specific wireless bearer; and performing a reordering procedure for the specific wireless bearer in the PDCP entity.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: November 19, 2019
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Publication number: 20190349962
    Abstract: Provided are a method and a device for a terminal executing a scheduling request in wireless communication. The method may include: receiving, from a base station, scheduling request configuration information for configuring a scheduling request using a multi-scheduling request resource; allocating the multi-scheduling request resource according to the scheduling request configuration information; and transmitting, to the base station, a multi-scheduling request using the multi-scheduling request resource.
    Type: Application
    Filed: October 27, 2017
    Publication date: November 14, 2019
    Applicant: KT CORPORATION
    Inventors: Ki-tae KIM, Woo-jin CHOI
  • Publication number: 20190349795
    Abstract: Provided is a method for transmitting and receiving downlink pre-emption indication data in a next generation/5G wireless access network. The method for a terminal for receiving downlink pre-emption indication data may include: receiving monitoring configuration data for downlink pre-emption indication data from a base station; and, on the basis of the monitoring configuration data, monitoring the downlink pre-emption indication data, wherein the monitoring configuration data comprises data for whether to monitor the downlink pre-emption indication data.
    Type: Application
    Filed: November 15, 2017
    Publication date: November 14, 2019
    Applicant: KT CORPORATION
    Inventors: Kyujin PARK, Woo-jin CHOI
  • Publication number: 20190342148
    Abstract: Provided are a method and apparatus for configuring dual-connectivity by a terminal, The method may include: performing configuration by adding a secondary base station signaling radio bearer (SRB); receiving a radio resource control (RRC) message including radio resource configuration information associated with a secondary base station or a secondary cell group through the secondary base station SRB; and transmitting a failure information message to a master base station when it is not possible to comply with the radio resource configuration information included in the RRC message.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 7, 2019
    Applicant: KT CORPORATION
    Inventors: Sung-pyo HONG, Woo-jin CHOI