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: 11002795
    Abstract: Provided is a charger with a battery diagnosis function and a control method thereof. The charger with a battery diagnosis function includes a DC-DC converter configured to operate in a charging mode to charge a battery or to operate in a diagnosing mode to apply a perturbation voltage to the battery when the battery is fully charged, and a digital signal processor configured to calculate an equivalent circuit model parameter of the battery according to an output response of the battery with respect to the perturbation voltage, to calculate a charging/discharging frequency of the battery by using an ohmic resistance value among the equivalent circuit model parameter of the battery, and to calculate a residual equivalent capacity of the battery by using the charging/discharging frequency of the battery.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: May 11, 2021
    Assignee: Foundation of Soongsil University-Industry Cooperation
    Inventors: Woo Jin Choi, Duck Min Kim
  • Patent number: 11006467
    Abstract: Provided is a method and apparatus for processing control plane data to enable an evolve Node B (eNB) and a User Equipment (UE) to transmit and/or receive user plane data through a WLAN carrier when the user plane data is transmitted by adding a WLAN radio resource to an E-UTRAN carrier in a radio access network (RAN) level. Particularly, provided is a method for a UE to transmit and receive data, the method including: receiving, from an eNB, wireless local area network (WLAN) cell configuration information which is for transmitting and receiving data using a WLAN radio resource; performing WLAN association based on the WLAN cell configuration information; transmitting a WLAN access confirmation message to the eNB; and receiving, from the eNB through a higher layer signaling, tunnel configuration information which is for the UE to set up a tunnel with the eNB through the WLAN radio resource.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: May 11, 2021
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Publication number: 20210120522
    Abstract: Provided are methods and devices for performing positioning in a next-generation wireless network. The method of a UE for performing positioning include identifying configuration information for a transmission bandwidth of a positioning reference signal (PRS) configured per cell and receiving the positioning reference signal corresponding to each cell based on the configuration information for the transmission bandwidth.
    Type: Application
    Filed: April 8, 2019
    Publication date: April 22, 2021
    Applicant: KT CORPORATION
    Inventors: Ki-tae KIM, Woo-jin CHOI, KI-HYEON PARK
  • Patent number: 10986530
    Abstract: Provided are methods and apparatuses for transmitting a buffer status report in carrier aggregation environment. The method may include receiving, from a base station, high layer signaling including information for configuring data duplicate transmission using carrier aggregation, configuring a plurality of radio link control (RLC) entities including a first RLC entity and a second RLC entity associated with one packet data convergence protocol (PDCP) entity based on the high layer signaling, and configuring a logical channel associated with the first RLC entity and a logical channel associated with the second RLC entity to one medium access control (MAC) entity; and when the data duplicate transmission is activated, transmitting, to the base station, the buffer status report including PDCP data volume in both a logical channel group associated with the first RLC entity and a logical channel group associated with the second RLC entity.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: April 20, 2021
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-Jin Choi
  • Publication number: 20210112522
    Abstract: Provided are a method and device for performing positioning in a new radio network. The method of a user equipment for performing positioning may include: receiving configuration information relating to subcarrier spacing within a frequency band through which a positioning reference signal (PRS) is transmitted; and receiving the positioning reference signal on the basis of the configuration information relating to the subcarrier spacing.
    Type: Application
    Filed: May 2, 2019
    Publication date: April 15, 2021
    Applicant: KT CORPORATION
    Inventors: Ki-tae KIM, Woo-jin CHOI
  • Patent number: 10979190
    Abstract: Provided are a method of configuring resource block (RB) indexing information about a component carrier (CC) by a base station (BS). The method may include: configuring common RB indexing information about the CC; configuring one or more bandwidth parts (BWPs) based on the common RB indexing information; and transmitting the common RB indexing information and configuration information about the bandwidth parts to a terminal.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: April 13, 2021
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Patent number: 10966253
    Abstract: Provided is a method for a base station executing a multi-beam-based random access procedure in wireless communication, and a device therefor. The method may include: transmitting information associated with a RACH resource to a terminal; receiving a multi-RACH preamble from the terminal by a multi-beam; and transmitting a random access response to the terminal.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: March 30, 2021
    Assignee: KT CORPORATION
    Inventors: Ki-tae Kim, Woo-jin Choi
  • Patent number: 10958380
    Abstract: Provided is a method of transmitting and receiving a data channel for the next-generation/5G radio access network. The method may include: receiving setting information about a code block group (CBG) for retransmission of the data channel from a base station; and receiving downlink control information (DCI) including scheduling information about the data channel from the base station, wherein the DCI includes transmission direction information about the CBG.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: March 23, 2021
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Patent number: 10952206
    Abstract: Provided is s a method for a base station to allocate a time interval resource to transceive a downlink data channel (PDSCH) or an uplink data channel (PUSCH). The method include allocating a time interval resource for each OFDM symbol on the basis of a slot or a mini-slot, transmitting, to a terminal, time interval resource configuration information including OFDM symbol allocation data for OFDM symbols used for data channel transception in the slot or the mini-slot, and transmitting, to the terminal, control information selecting one of the symbol allocation data included in the time interval resource configuration information.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: March 16, 2021
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-Jin Choi
  • Patent number: 10925079
    Abstract: The present embodiments provide a method for scheduling an uplink signal and a downlink data channel in an NR, wherein one embodiment is a method by which a terminal schedules an uplink signal and a downlink data channel, the method comprising the steps of: receiving, from a base station, an uplink signal and downlink data channel scheduling information; and scheduling the uplink signal and the downlink data channel on the basis of the scheduling information.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: February 16, 2021
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Patent number: 10911942
    Abstract: The provided is a method and apparatus for adding a WLAN carrier to an E-UTRAN carrier at a radio access network (RAN) level to transmit and receive data. The method may include: receiving, from a base station, additional configuration indication information for additionally configuring a WLAN carrier; additionally configuring the WLAN carrier on the basis of the additional configuration indicating information; and attempting WLAN associating through the WLAN carrier using UE identification information, wherein a WLAN end transmits confirmation information for the WLAN association of the UE to the base station.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: February 2, 2021
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Patent number: 10897720
    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: Grant
    Filed: November 15, 2017
    Date of Patent: January 19, 2021
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-Jin Choi
  • Publication number: 20210007531
    Abstract: A steam exhausting device coupled to a cover of an electric pressure cooker includes: a housing that has an upper surface defining a first opening and a lower surface defining a second opening; a steam pipe that is spaced apart from the second opening and that extends along a vertical line passing the second opening; a pressure member arranged in the housing along the vertical line and configured to move down to a discharge end of the steam pipe; a lever disposed in the housing and having a first end connected to the pressure member; a button connected to a second end of the lever and configured to move vertically along a vertical axis passing the first opening, where the button includes a magnetic body; and an electromagnet disposed at a bottom surface of the housing. The vertical axis passes the electromagnet.
    Type: Application
    Filed: February 19, 2020
    Publication date: January 14, 2021
    Inventors: Byungkyu PARK, Hyeunsik NAM, Wan Soo KIM, Woo Jin CHOI
  • Patent number: 10892867
    Abstract: Provided are an sTTI setting method for an sPUSCH in a short ITT frame structure and a specific operating method for an sPUSCH based on a shared DM-RS. In the method, a shared DM-RS within an SPUSCH is allocated only to a specific symbol included in a partial sTTI and is used in all sPUSCHs within a legacy TTI (=1 ms).
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: January 12, 2021
    Assignee: KT CORPORATION
    Inventors: Ki-tae Kim, Woo-jin Choi
  • Patent number: 10880222
    Abstract: A method of a terminal may be provided for transmitting an RLC status protocol data unit (PDU). The method may include receiving an RLC data unit from a base station, configuring the RLC status PDU indicating whether the RLC data unit is received, where the RLC status PDU includes at least one of a negative acknowledgement (NACK) sequence number field and a NACK range field; and transmitting the RLC status PDU to the base station.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: December 29, 2020
    Assignee: KT CORPORATION
    Inventors: Sung-pyo Hong, Woo-jin Choi
  • Patent number: 10869174
    Abstract: Provided are a method of supporting Single Cell Point-to-Multi-point (SC-PTM) for a Bandwidth reduced Low complexity/Coverage Enhancement (BL/CE) terminal or an NB-IoT terminal, which are for a Machine Type Communication (MTC) application defined in a 3GPP LTE/LTE-A system. The method may include receiving configuration information relating to an NPDCCH search space from a base station wherein the NPDCCH search space is separately configured to receive scheduling control information for the multicasting control channel; receiving the scheduling control information for the multicasting control channel through the NPDCCH search space configured based on the configuration information; and receiving the multicasting control channel based on the scheduling control information, wherein the configuration information is received through higher layer signaling.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: December 15, 2020
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Patent number: 10869303
    Abstract: Provided is a method for monitoring, transmitting, and receiving downlink pre-emption indication information in a next-generation/5G radio access network. The method may include receiving monitoring configuration information for downlink pre-emption indication information from a base station; receiving configuration information on a control resource set (CORESET) for receiving the downlink pre-emption indication information from the base station; configuring reference downlink resources based on the configuration information on a control resource set; and monitoring the downlink pre-emption indication information for the reference downlink resources, wherein the downlink pre-emption indication information includes a bitmap indicating information on at least one of time-section resources and frequency-section resources in which pre-emption has occurred, among reference downlink resources.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: December 15, 2020
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Patent number: 10868702
    Abstract: The present embodiments relate to a method for configuring a cyclic prefix for a next generation/5G radio access network (referred to as new radio (NR)) about which 3GPP has begun discussions. According to the present embodiments, a base station configures cyclic prefix (CP) lengths for secondary numerology except for reference numerology and sets, through RRC signaling, the values of the CP lengths configured for the secondary numerology, thereby enabling a terminal to detect the CP lengths for the secondary numerology in a cell supporting mixed numerology.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: December 15, 2020
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-jin Choi
  • Patent number: 10861685
    Abstract: The fluoro-based polymer composite target for sputtering according to the present invention is excellent in adhesion with a metal electrode to which a voltage is applied, can prevent bending, and is capable of stably forming plasma by imparting conductivity even with industrially widely used DC and MF power supply systems, thereby allowing a fluorinated polymer to be effectively deposited on an adherend by sputtering.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: December 8, 2020
    Assignee: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
    Inventors: Sang Jin Lee, Jae Heung Lee, Woo Jin Choi, Cheol Hwan Kim, Sung Hyun Kim, Seong Geun Cho, Dong Seok Ham, Kwang Je Kim, Dong Soon Park, Jae Seong Park
  • Patent number: 10856307
    Abstract: Provided is a method for transmitting and receiving downlink pre-emption indication information using a bitmap in a next-generation/5G radio access network. The method may include: receiving monitoring configuration information for downlink pre-emption indication information from a base station; monitoring downlink pre-emption indication information based on the monitoring configuration information; and receiving the downlink pre-emption indication information from the base station, wherein the downlink pre-emption indication information includes a bitmap indicating information on at least one of time-section resources and frequency-section resources in which pre-emption has occurred, among reference downlink resources.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: December 1, 2020
    Assignee: KT CORPORATION
    Inventors: Kyujin Park, Woo-Jin Choi