Patents by Inventor Joon Kui Ahn

Joon Kui Ahn 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: 20170078012
    Abstract: A method for providing precoding weights for data symbols of data control subframes includes generating a downlink frame having control subframes which individually correspond to one of a plurality of downlink data subframes, and inserting weight information into each of the control subframes, such that the weight information is to be applied to data symbols present in the corresponding one of the data subframes. The method further includes transmitting the control subframes and the inserted weight information to a receiving device.
    Type: Application
    Filed: November 4, 2016
    Publication date: March 16, 2017
    Applicant: LG ELECTRONICS INC.
    Inventors: Dong Youn SEO, Bong Hoe KIM, Young Woo YUN, Ki Jun KIM, Jung Hoon LEE, Eun Sun KIM, Hak Seong KIM, Suk Hyon YOON, Joon Kui AHN
  • Patent number: 9590693
    Abstract: A method for performing uplink transmission in a time domain transmission unit includes receiving, from a base station, hopping-mode information indicating whether a frequency hopping is an inter-slot hopping or an inter-subframe hopping and performing the uplink transmission using a resource block in the time domain transmission unit.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: March 7, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Joon Kui Ahn, Nam Yul Yu, Young Woo Yun, Ki Jun Kim, Hyun Wook Park
  • Patent number: 9591584
    Abstract: A method for controlling transmission powers by a communication apparatus in a wireless communication system supporting a plurality of component carriers; and a communication apparatus therefore are discussed. The method according to one embodiment includes controlling transmission powers for one or more channels per each component carrier; when a sounding reference symbol (SRS) transmission overlaps with a physical uplink shared channel (PUSCH) transmission in a time domain, checking whether a total of a PUSCH transmission power for the PUSCH transmission on a first component carrier and a SRS transmission power for the SRS transmission on a second component carrier exceeds a maximum transmission power configured for the communication apparatus; and dropping the SRS if the total of the PUSCH transmission power and the SRS transmission power exceeds the maximum transmission power configured for the communication apparatus.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: March 7, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Dong Youn Seo, Ki Jun Kim, Joon Kui Ahn, Min Gyu Kim, Jung Hoon Lee, Dae Won Lee, Suck Chel Yang
  • Patent number: 9590783
    Abstract: A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N?1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M?1’ of the M antennas are mapped to the second subframe.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: March 7, 2017
    Assignee: LG Electronics Inc.
    Inventors: Jung Hoon Lee, Dong Youn Seo, Ki Jun Kim, Joon Kui Ahn
  • Publication number: 20170064677
    Abstract: A method, a user equipment, and a base station for maintaining uplink synchronization in a wireless communication system supporting carrier aggregation are discussed. The method of maintaining uplink synchronization at a user equipment according to an embodiment includes receiving a physical downlink control channel (PDCCH) order. The PDCCH order indicates an initiation of a random access procedure and includes a carrier indicator field and a predefined set of values of a 1-bit flag indicating a localized/distributed resource block assignment, and a resource block assignment field. The method further includes transmitting a random access preamble through an uplink component carrier corresponding to a value of the carrier indicator field among a plurality of uplink component carriers.
    Type: Application
    Filed: November 9, 2016
    Publication date: March 2, 2017
    Applicant: LG ELECTRONICS INC.
    Inventors: Suck Chel YANG, Min Gyu KIM, Joon Kui AHN, Dong Youn SEO
  • Publication number: 20170064687
    Abstract: A method and a user equipment for controlling an uplink transmission at in a wireless communications system are discussed, the user equipment being configured with multiple component carriers. The method according to an embodiment includes receiving, from a base station, Radio Resource Control (RRC) configuration information for a channel status information report; and performing a procedure for periodically transmitting channel status information to the base station. If the corresponding downlink component carrier is in an active state at a time for transmitting the channel status information, a transmission of the channel status information report is performed at the time. If the corresponding downlink component carrier is in a non-active state at a time for transmitting the channel status information report, the transmission of the channel status information report is skipped at the time. Signal reception is limited by the user equipment on a downlink component carrier in the non-active state.
    Type: Application
    Filed: November 9, 2016
    Publication date: March 2, 2017
    Applicant: LG ELECTRONICS INC.
    Inventors: Suck Chel YANG, Dong Youn SEO, Min Gyu KIM, Joon Kui AHN, Jung Hoon LEE
  • Patent number: 9584287
    Abstract: Provided are a method and an apparatus for transmitting uplink control information performed by a user equipment in a wireless communication system. The method comprises the steps of: receiving a first parameter for indicating whether to simultaneously transmit a first combination of an acknowledgement/negative-acknowledgement (ACK/NACK) and a channel quality indicator (CQI), and a second parameter for indicating whether to multiplex a second combination of an ACK/NACK and the CQI and transmitting same as a second physical uplink control channel (PUCCH) format; and multiplexing the first combination of the ACK/NACK or the second combination of ACK/NACK with the CQI and transmitting same as a first PUCCH format or the second PUCCH format, based on the first parameter and the second parameter.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: February 28, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Dong Youn Seo, Joon Kui Ahn, Suck Chel Yang, Yun Jung Yi
  • Patent number: 9585133
    Abstract: A method and base station for receiving a sounding reference signal (SRS) in a wireless communication system and a method and user equipment for transmitting a sounding reference signal (SRS) in a wireless communication system are discussed. The method of receiving according to an embodiment includes transmitting a physical downlink control channel (PDCCH) including a carrier indicator field (CIF) and an SRS field via a first component carrier (CC), the CIF indicating a specific CC, the SRS field indicating whether the user equipment has to transmit the SRS; receiving the SRS on an uplink subframe via the specific CC indicated by the CIF when the SRS field is enabled; and transmitting a first medium access control (MAC) information including a bitmap in which a bit corresponding to the specific CC is disabled for deactivating the specific CC. An SRS transmission is not performed on the deactivated specific CC.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: February 28, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Min Gyu Kim, Dong Youn Seo, Han Byul Seo, Joon Kui Ahn, Suck Chel Yang
  • Patent number: 9578652
    Abstract: Provided are a method and apparatus for transmitting data in a wireless communication system. The method comprises the steps of: setting up a frame including both a control domain for transmitting scheduling information to a first terminal and a data domain for transmitting first data to the first terminal; and transmitting, to a second terminal, second data in the control domain. The frame comprises a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain. The control domain consists of a first number N (where N is any natural number equal to or less than 4) of OFDM symbols in the frame. The data domain consists of OFDM symbols other than a number N of OFDM symbols in the frame. The second data has a predetermined bit size.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: February 21, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Dong Youn Seo, Han Byul Seo, Suck Chel Yang, Joon Kui Ahn
  • Patent number: 9578633
    Abstract: Provided is a method and an apparatus for transmitting uplink control information by a terminal in wireless communication system. When a PUCCH resource used for transmitting only periodic CSI from a subframe, the resource is a first resource, and a resource indicated by ARI is a second resource, when a setting allows transmitting together ACK/NACK and the periodic CSI through a PUCCH from the same subframe, the first resource and the second resource are mutually exclusive, and the second resource that is used for transmitting together the ACK/NACK and the periodic CSI uses the resource indicated by the ARI from resources determined by an RRC.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: February 21, 2017
    Assignee: LG Electronics Inc.
    Inventors: Dong Youn Seo, Suck Chel Yang, Joon Kui Ahn
  • Patent number: 9577808
    Abstract: The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for performing processes in which a terminal determines control channel allocation, as well as to an apparatus for the method. The method comprises the following steps: monitoring, on a first carrier, a first search space, containing a control channel candidate set, for control channels having no carrier indication information; and monitoring, on a second carrier, a second search space, containing a control channel candidate set, for control channels having carrier indication information. If the terminal is set to monitor a plurality of control channel candidates which have the same radio network temporary identifier (RNTI), the same information size, and the same first control channel element (CCE) in the first search space and in the second search space, the control channels are received only in the first search space on the first carrier.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: February 21, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Suck Chel Yang, Min Gyu Kim, Joon Kui Ahn, Dong Youn Seo
  • Patent number: 9578606
    Abstract: A method is provided for controlling transmission powers by a communication apparatus in a wireless communication system supporting a plurality of component carriers. When a sounding reference symbol (SRS) transmission overlaps with a physical uplink control channel (PUCCH) transmission in a time domain, the communication apparatus checks as to whether a total of a PUCCH transmission power for the PUCCH transmission on a first component carrier and a SRS transmission power for the SRS transmission on a second component carrier exceeds a maximum transmission power configured for the communication apparatus. The SRS transmission is dropped by the communication apparatus if the total of the PUCCH transmission power and the SRS transmission power exceeds the maximum transmission power configured for the communication apparatus.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: February 21, 2017
    Assignee: LG Electronics Inc.
    Inventors: Dong Youn Seo, Ki Jun Kim, Joon Kui Ahn, Min Gyu Kim, Jung Hoon Lee, Dae Won Lee, Suck Chel Yang
  • Publication number: 20170048848
    Abstract: A method is presented of reporting control information in a wireless communication system in which M downlink time divisional duplex (TDD) subframes are associated with an uplink TDD subframe. A user equipment (UE), supporting at least one cell including a primary cell, receives a radio resource control (RRC) message indicating resource allocation information used for a first PUCCH format. The UE receives a first physical downlink shared channel (PDSCH) and a second PDSCH in one of the M downlink TDD subframes, wherein the second PDSCH is received with a downlink assignment index (DAI). The UE selects a physical uplink control channel (PUCCH) format among a plurality of PUCCH formats including the first PUCCH format and a second PUCCH format, and transmits a positive-acknowledgement (ACK)/negative-acknowledgement (NACK) signal for the first and second PDSCHs by using the selected PUCCH format.
    Type: Application
    Filed: November 1, 2016
    Publication date: February 16, 2017
    Applicant: LG ELECTRONICS INC.
    Inventors: Suck Chel YANG, Joon Kui AHN, Dong Youn SEO, Min Gyu KIM
  • Patent number: 9571254
    Abstract: A method and apparatus are presented for transmitting acknowledgement (ACK)/negative acknowledgement (NACK) signals in a wireless communication system. ACK/NACKs are spread using spreading codes of a spreading factor, the spreading factor being one of a first spreading factor equal to 2 and a second spreading factor equal to 4. One or more physical hybrid automatic repeat request (ARQ) indicator channel (PHICH) groups allocated in units of four resource elements are transmitted, each PHICH group carrying up to four ACK/NACK signals for the first spreading factor, and up to eight ACK/NACK signals for the second spreading factor. A total number of allocated PHICH groups for the first spreading factor is determined as twice a total number of allocated PHICH groups for the second spreading factor. A PHICH group index for an ACK/NACK is determined using a first function. A spreading code index for the ACK/NACK is determined using a second function.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: February 14, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Jung Hoon Lee, Joon Kui Ahn
  • Publication number: 20170041907
    Abstract: The present invention relates to a method for configuring a starting position of a control channel in a wireless communication system, and a terminal using the same. The method includes receiving duration information about a physical downlink control channel from the first orthogonal frequency division multiplexing (OFDM) symbol of a downlink subframe; and configuring a first OFDM symbol after OFDM symbols indicated by the duration information, as a starting point of an enhanced-physical downlink control channel. The downlink subframe includes a plurality of subcarriers in a frequency domain and 12 or 14 OFDM symbols in a time domain. The PDCCH includes the first N (N is a natural number of from 1 to 4) number of OFDM symbols of the downlink subframe. The duration information indicates the N number of OFDM symbols. The E-PDCCH comprises the starting point to the last OFDM symbol of the downlink subframe.
    Type: Application
    Filed: October 3, 2016
    Publication date: February 9, 2017
    Applicant: LG ELECTRONICS INC.
    Inventors: Dong Youn SEO, Joon Kui AHN, Suck Chel YANG, Han Byul SEO
  • Patent number: 9565663
    Abstract: A method and apparatus for transmitting control information are discussed. The method can include generating uplink control information (UCI) and transmitting the UCI through an physical uplink control channel (PUCCH) in a subframe, wherein when the subframe is configured for transmission of a scheduling request (SR) and when transmission of a hybrid automatic repeat request (HARQ)-acknowledgement (ACK) coincides with the subframe, transmission power of the PUCCH is determined based on a number of HARQ-ACK information bits and a SR bit. A value of the SR bit can be determined by whether or not the subframe is configured for a scheduling request.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: February 7, 2017
    Assignee: LG Electronics Inc.
    Inventors: Min Gyu Kim, Suck Chel Yang, Joon Kui Ahn, Dong Youn Seo
  • Publication number: 20170034846
    Abstract: A user equipment (UE) receives downlink data using resource blocks in a wireless mobile communication system. The UE includes data processing circuitry coupled to a receiver that receives downlink control information including resource allocation information for the downlink data from a base station and to receive the downlink data mapped to physical resource blocks (PRBs) based on the downlink control information. The resource allocation information indicates virtual resource block (VRB) allocations for the user equipment. Each resource block corresponds to one time slot. A resource block pair includes a first resource block associated with a first time slot and a second resource block associated with a second time slot adjacent to the first time slot. The first and second resource blocks are allocated to the same frequency indices.
    Type: Application
    Filed: October 14, 2016
    Publication date: February 2, 2017
    Inventors: Dong Youn SEO, Eun Sun KIM, Bong Hoe KIM, Joon Kui AHN
  • Patent number: 9559826
    Abstract: A method of controlling an uplink transmission in a wireless communications system, and a user equipment therefore are discussed. The method according to one embodiment includes configuring the user equipment with multiple component carriers; receiving first configuration information for allocating one or more component carrier sets; receiving second configuration information for periodically transmitting an uplink signal; receiving control information for configuring states of component carriers, by which a downlink component carrier and an uplink component carrier are controlled to be in a same state; and performing a procedure for periodically transmitting the uplink signal on an uplink component carrier in use of the first configuration information, the second configuration information and the control information. When the uplink component carrier is in the active state, a transmission of the uplink signal is performed.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: January 31, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Suck Chel Yang, Dong Youn Seo, Min Gyu Kim, Joon Kui Ahn, Jung Hoon Lee
  • Publication number: 20170026958
    Abstract: A method and a user equipment (UE) for transmitting control information in a wireless communication system are discussed. The method according to one embodiment includes receiving a parameter which indicates whether transmission of a hybrid automatic repeat request acknowledgement (HARQ-ACK) on a physical uplink control channel (PUCCH) and a sounding reference signal (SRS) in one subframe is configured; if the parameter is true, transmitting, in a primary component carrier (CC), the PUCCH, which coincides in a same subframe as the SRS, by using a shortened PUCCH format carrying at least one of the HARQ-ACK and a positive scheduling request (SR); and if the parameter is false, transmitting the PUCCH by using a normal PUCCH format, while not transmitting, in a secondary CC, the SRS which coincides in the same subframe as the PUCCH. The shortened PUCCH format is a shortened PUCCH format 1/1a/1b or a shortened PUCCH format 3.
    Type: Application
    Filed: October 7, 2016
    Publication date: January 26, 2017
    Applicant: LG ELECTRONICS INC.
    Inventors: Min Seok NOH, Dong Youn SEO, Seung Hee HAN, Min Gyu KIM, Jae Hoon CHUNG, Suck Chel YANG, Joon Kui AHN
  • Publication number: 20170026096
    Abstract: A method for indicating a combination between a codeword and a layer in a MIMO communication, system, a layer mapping method, and a data transmission method using the same are disclosed. A minimum number of codeword-layer mapping combinations from among all available combinations based on the' numbers of all codewords and all layers are pre-defined in consideration of a ratio of a codeword to a layer, a reception performance of a receiver, and reduction of combinations, so that a data transmission method using the predefined combinations is implemented. If a.specific one codeword is mapped to at least two layers, a diversity gain can be acquired.
    Type: Application
    Filed: October 7, 2016
    Publication date: January 26, 2017
    Inventors: Dong Wook Roh, Bong Hoe Kim, Young Woo Yun, Dong Youn Seo, Joon Kui Ahn, Ki Jun Kim