Patents by Inventor Sung Duck Chun

Sung Duck Chun 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).

  • Publication number: 20190289544
    Abstract: A random access procedure between a mobile terminal and a network is performed based upon the characteristics of a RACH preamble transmitted by the terminal. A first type of random access preamble is selectable by the terminal from a set of random access preambles, and a second type of random access preamble is directly allocated to the terminal by the network. The network responds with a random access response. The terminal performs a discontinuous reception (DRX) operation that allows it to monitor a downlink control channel discontinuously. The DRX operation includes an active time period during which the terminal monitors the control channel after successful reception of the random access response for the second type of random access preamble until a transmission from the network addressed to a Cell-Radio Network Temporary Identifier (C-RNTI) associated with the terminal is received.
    Type: Application
    Filed: May 31, 2019
    Publication date: September 19, 2019
    Inventors: Seung-June YI, Sung-Jun PARK, Young-Dae LEE, Sung-Duck CHUN
  • Patent number: 10412711
    Abstract: In a wireless mobile communications system, a method for controlling a radio resource allocation is provided. A network transmits access control information to a terminal such that a request for the radio resource allocation which will be transmitted from the terminal can be controlled. The terminal selectively transmits the request for the radio resource allocation based on the received information, thus a transmission of an unnecessary request for the radio resource can be minimized, thereby preventing a waste of the radio resource.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: September 10, 2019
    Assignee: LG Electronics Inc.
    Inventors: Sung Duck Chun, Young Dae Lee, Sung Jun Park, Seung June Yi
  • Publication number: 20190268785
    Abstract: A PDCP status report can be transmitted with reduced radio resources by transmitting the reception success or failure of a series of PDCP service data units (SDUs) in the form of a bitmap when configuring the PDCP status report. A PDCP control packet data unit (PDU) is generated to communicate a status report to a transmitting node for one or more PDCP SDUs transmitted from the transmitting node. The PDCP control PDU includes a data/control (D/C) bit field to indicate the PDCP control PDU is a control PDU, a control PDU type field to indicate a type of corresponding control information, a sequence number field to indicate a first missing PDCP SDU, and a bitmap field for a variable length bitmap. A bit in the variable length bitmap indicates whether a corresponding one of the one or more PDCP SDUs has been successfully been received.
    Type: Application
    Filed: May 9, 2019
    Publication date: August 29, 2019
    Inventors: Seung June Yi, Sung Jun Park, Young Dae Lee, Sung Duck Chun
  • Patent number: 10348470
    Abstract: The present invention relates to a wireless communication system and a terminal providing a wireless communication service and to a method by which a base station and a terminal transmit and receive data in an evolved universal mobile telecommunications system evolved from universal mobile telecommunications system or a long term evolution system, and more particularly, to a method of controlling a monitoring operation of a physical downlink channel during a radio resource allocation procedure such that the radio resource allocation procedure can be performed with a minimum power usage by the terminal.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: July 9, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Seung June Yi, Sung Duck Chun, Sung Hoon Jung, Sung Jun Park
  • Patent number: 10349348
    Abstract: A random access procedure between a mobile terminal and a network is performed based upon the characteristics of a RACH preamble transmitted by the terminal. A first type of random access preamble is selectable by the terminal from a set of random access preambles, and a second type of random access preamble is directly allocated to the terminal by the network. The network responds with a random access response. The terminal performs a discontinuous reception (DRX) operation that allows it to monitor a downlink control channel discontinuously. The DRX operation includes an active time period during which the terminal monitors the control channel after successful reception of the random access response for the second type of random access preamble until a transmission from the network addressed to a Cell-Radio Network Temporary Identifier (C-RNTI) associated with the terminal is received.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: July 9, 2019
    Assignee: Optis Cellular Technology, LLC
    Inventors: Seung-June Yi, Sung-Jun Park, Young-Dae Lee, Sung-Duck Chun
  • Publication number: 20190182692
    Abstract: The present invention provides a method of receiving a timing advance command by a user equipment in a wireless communication system. A terminal receives information on a time advance group from a base station, and also receives the tuning advance command corresponding to the time advance group from the base station.
    Type: Application
    Filed: February 15, 2019
    Publication date: June 13, 2019
    Applicant: LG ELECTRONICS INC.
    Inventors: Sung Jun PARK, Sung Duck CHUN, Sung Hoon JUNG, Seung June Yi, Young Dae LEE
  • Publication number: 20190174352
    Abstract: An apparatus and method for performing procedures (protocols) of a PDCP (Packet Data Convergence Protocol) layer and an RLC (radio layer in an E-UMTS (Evolved Universal Mobile Telecommunications System) which has evolved from UMTS, among radio protocols of a mobile communication system. The PDCP layer performs ciphering on data (i.e., PDCP SDU) received from an upper layer, generates an indicator discriminating ciphered data and non-ciphered data (i.e., an ROHC feedback packet directly generated by the PDCP layer), and transmits the same to a lower layer (i.e., MAC layer). A PDCP SN (Sequence Number) is defined as an algorithm for ciphering the data in the PDCP layer to perform ciphering in the PDCP layer.
    Type: Application
    Filed: January 30, 2019
    Publication date: June 6, 2019
    Applicant: LG ELECTRONICS INC.
    Inventors: Seung-June YI, Young-Dae LEE, Sung-Duck CHUN, Sung-Jun PARK
  • Patent number: 10314081
    Abstract: Disclosed is the radio (wireless) communication system providing a radio communication service and the terminal, and more particularly, a method of handling time alignment command during a random access procedure in an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from the Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system is provided.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: June 4, 2019
    Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Sung-Duck Chun, Seung-June Yi, Sung-Jun Park
  • Patent number: 10306489
    Abstract: A status report transmission of the PDCP layer for a PDCP status report can reduce radio resources by transmitting the reception success or failure of a series of PDCP service data units (SDUs) in the form of a bitmap when configuring the PDCP status report for reporting a reception status of PDCP SDUs to another party in the PDCP layer. A PDCP control packet data unit (PDU) is generated to communicate a status report for one or more PDCP SDUs transmitted from a transmitting node. The PDCP control PDU includes a data/control (D/C) bit field to indicate the PDCP control PDU is a control PDU, a control PDU type field to indicate a type of corresponding control information, a sequence number field to indicate a first missing PDCP SDU, and a bitmap field for a variable length bitmap. A specific bit in the variable length bitmap indicates whether a corresponding one of the one or more PDCP SDUs has been successfully been received. The PDCP control PDU is transmitted to the transmitting node.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: May 28, 2019
    Assignee: Optis Cellular Technology, LLC
    Inventors: Seung June Yi, Sung Jun Park, Young Dae Lee, Sung Duck Chun
  • Patent number: 10244430
    Abstract: An apparatus and method for performing procedures (protocols) of a PDCP (Packet Data Convergence Protocol) layer and an RLC (radio layer in an E-UMTS (Evolved Universal Mobile Telecommunications System) which has evolved from UMTS, among radio protocols of a mobile communication system. The PDCP layer performs ciphering on data (i.e., PDCP SDU) received from an upper layer, generates an indicator discriminating ciphered data and non-ciphered data (i.e., an ROHC feedback packet directly generated by the PDCP layer), and transmits the same to a lower layer (i.e., MAC layer). A PDCP SN (Sequence Number) is defined as an algorithm for ciphering the data in the PDCP layer to perform ciphering in the PDCP layer.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: March 26, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Seung-June Yi, Young-Dae Lee, Sung-Duck Chun, Sung-Jun Park
  • Patent number: 10129795
    Abstract: A mobile communications system including a network with a source network node and a target network node that supports a handover procedure, and a mobile terminal that is allowed to access the source network node and access the target network node according to the handover procedure, in which information related to a reception status of user data is delivered between at least two among a group including the mobile terminal, the source network node, and the target network node such that the target network node may receive status information from the source network node and the target network node may receive a status report from the mobile terminal.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: November 13, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Sung-Duck Chun, Young-Dae Lee, Myung-Cheul Jung, Sung-Jun Park
  • Patent number: 10122441
    Abstract: The present invention relates to a wireless communication system and a user equipment (UE) providing wireless communication services, and more particularly, a method of preventing transmission error of data while maintaining its security and a method of controlling an access of a Relay Node (RN) to a Donor eNB (DeNB) and an access of the UE to the RN during a process of transmitting and receiving user data when the RN as a radio network node is connected to the DeNB in an Evolved Universal Mobile Telecommunications System (E-UMTS), a Long Term Evolution (LTE) system, and a LTE-Advanced (LTE-A) system that have evolved from a Universal Mobile Telecommunications System (UMTS).
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: November 6, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Sung-Duck Chun, Seung-June Yi, Sung-Hoon Jung, Sung-Jun Park
  • Publication number: 20180242369
    Abstract: Disclosed is the radio (wireless) communication system providing a radio communication service and the terminal, and more particularly, a method of handling time alignment command during a random access procedure in an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from the Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system is provided.
    Type: Application
    Filed: February 19, 2018
    Publication date: August 23, 2018
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Sung-Duck CHUN, Seung-June YI, Sung-Jun PARK
  • Patent number: 10045381
    Abstract: A method for transmitting radio resources in a mobile communication system is disclosed. The method includes receiving a random access channel (RACH) preamble from a plurality of UEs and transmitting response information associated with the received preambles over a common channel wherein the plurality UEs can access the common channel and receive corresponding information. If a HARQ scheme is used when a UE transmits data to the eNode-B using uplink radio resources allocated over the RACH, the eNode-B does not pre-allocate uplink radio resources required for re-transmission and performs allocation of radio resources for a first transmission of HARQ. If the re-transmission is required, the eNode-B allocates the radio resources required for the re-transmission with the NACK signal. If re-transmission is not required, the present invention can reduce an amount of wasted radio resources.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: August 7, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Young Dae Lee, Sung Duck Chun, Myung Cheul Jung, Sung Jun Park
  • Patent number: 10038701
    Abstract: According to one embodiment, a method of performing a re-establishment procedure in a mobile communication system includes: receiving at least one packet data convergence protocol (PDCP) control plane data unit; performing an integrity check on the at least one PDCP control plane data unit; identifying an integrity check failure with regard to the at least one PDCP control plane data unit; and performing a re-establishment procedure if the integrity check failure is identified to exist with regard to the at least one PDCP control plane data unit.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: July 31, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Seung June Yi, Sung Jun Park, Young Dae Lee, Sung Duck Chun
  • Publication number: 20180192308
    Abstract: A status report transmission of the PDCP layer for a PDCP status report can reduce radio resources by transmitting the reception success or failure of a series of PDCP service data units (SDUs) in the form of a bitmap when configuring the PDCP status report for reporting a reception status of PDCP SDUs to another party in the PDCP layer. A PDCP control packet data unit (PDU) is generated to communicate a status report for one or more PDCP SDUs transmitted from a transmitting node. The PDCP control PDU includes a data/control (D/C) bit field to indicate the PDCP control PDU is a control PDU, a control PDU type field to indicate a type of corresponding control information, a sequence number field to indicate a first missing PDCP SDU, and a bitmap field for a variable length bitmap. A specific bit in the variable length bitmap indicates whether a corresponding one of the one or more PDCP SDUs has been successfully been received. The PDCP control PDU is transmitted to the transmitting node.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 5, 2018
    Inventors: Seung-June YI, Sung-Jun PARK, Young-Dae LEE, Sung-Duck CHUN
  • Patent number: 9992707
    Abstract: A method and apparatus of reporting logged measurements of an user equipment in a wireless communication system is provided. The user equipment in a Radio Resource Control (RRC) connected mode receives from a base station a Minimization of Drive Tests (MDT) configuration. The user equipment transitions from the RRC connected mode to an RRC idle mode and logs measurements based on the MDT configuration. The user equipment transmits to the base station a logging indicator indicating an availability of the logged measurement.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: June 5, 2018
    Assignee: LG Electronics Inc.
    Inventors: Sung Min Lee, Sung Duck Chun, Seung June Yi, Sung Hoon Jung, Young Dae Lee, Sung Jun Park
  • Publication number: 20180152867
    Abstract: A mobile communications system including a network with a source network node and a target network node that supports a handover procedure, and a mobile terminal that is allowed to access the source network node and access the target network node according to the handover procedure, in which information related to a reception status of user data is delivered between at least two among a group including the mobile terminal, the source network node, and the target network node such that the target network node may receive status information from the source network node and the target network node may receive a status report from the mobile terminal.
    Type: Application
    Filed: December 14, 2017
    Publication date: May 31, 2018
    Applicant: LG ELECTRONICS INC.
    Inventors: Sung-Duck CHUN, Young-Dae LEE, Myung-Cheul JUNG, Sung-Jun PARK
  • Patent number: 9985722
    Abstract: A method and device for performing a contention based random access procedure by a mobile communication terminal in communication with a base station. The method according to an embodiment includes transmitting a random access preamble message to the base station; receiving a random access response from the base station, the random access response including a timing advance command; determining a status of a mobile communication terminal time alignment timer; and ignoring the timing advance command if the mobile communication terminal time alignment timer is determined to be running in the determining step.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: May 29, 2018
    Assignee: Optis Cellular Technology, LLC
    Inventors: Sung Jun Park, Seung June Yi, Young Dae Lee, Sung Duck Chun
  • Publication number: 20180124627
    Abstract: The present invention provides a method of receiving a. timing advance command by a user equipment in a wireless communication system. A terminal receives information on a time advance group from a base station, and also receives the tuning advance command corresponding to the time advance group from the base station.
    Type: Application
    Filed: December 14, 2017
    Publication date: May 3, 2018
    Applicant: LG ELECTRONICS INC.
    Inventors: Sung Jun PARK, Sung Duck CHUN, Sung Hoon JUNG, Seung June Yi, Young Dae LEE