Patents by Inventor Dong-Wook Roh

Dong-Wook Roh 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).

  • Method for transmitting control information, and method for generating codeword for the same
    Patent number: 9119198
    Abstract: A method for transmitting downlink control information and a method for generating a codeword for the same are disclosed. In generating a long code having a low code rate, a basic code of which minimum distance between codes is maximized is repeated by a prescribed number of times and bits of the repeated code are adjusted. Therefore, a minimum distance condition between codes of a long code is satisfied and simultaneously the code be simply generated.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: August 25, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Dong Wook Roh, Bong Hoe Kim, Young Woo Yun, Dong Youn Seo, Dae Won Lee, Jung Hoon Lee, Joon Kui Ahn, Ki Jun Kim
  • METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WLAN SYSTEM
    Publication number: 20150237613
    Abstract: A method and apparatus for signal transmission in a Wireless Local Area Network (WLAN) system. The method according to one embodiment includes generating a first very high throughput (VHT) signal, generating a second VHT signal, and transmitting the first VHT signal and the second VHT signal. The first VHT signal includes an indicator indicating that the second VHT signal is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme. The first VHT signal and the second VHT signal are used to transmit control information, and the control information includes a modulation and coding scheme (MCS) index indicating an MCS used in the step of transmitting and further includes a spatial stream identifier indicating a number of spatial streams.
    Type: Application
    Filed: May 4, 2015
    Publication date: August 20, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Dae Won LEE, Dong Wook ROH, Byeong Woo KANG, Yong Ho SEOK, Yu Jin NOH, Bong Hoe KIM
  • METHOD AND APPARATUS OF TRANSMITTING TRAINING SIGNAL IN WIRELESS LOCAL AREA NETWORK SYSTEM
    Publication number: 20150236831
    Abstract: A method of transmitting a training signal in a Wireless Local Area Network (WLAN) system includes generating one or more first training signals for a first destination station and one or more second training signals for a second destination station by applying a mapping matrix P to a training signal generation sequence, mapping the first training signals and the second training signals to a plurality of antennas according to an antenna mapping matrix, and performing Inverse Fast Fourier Transform (IFFT) on each of the first training signals and the second training signals mapped to the plurality of antennas and transmitting the training signals through the plurality of antennas.
    Type: Application
    Filed: April 23, 2015
    Publication date: August 20, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Byeong Woo KANG, Dong Wook ROH, Yong Ho SEOK, Yu Jin NOH, Bong Hoe KIM, Dae Won LEE
  • TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM
    Publication number: 20150236835
    Abstract: A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.
    Type: Application
    Filed: April 30, 2015
    Publication date: August 20, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Jung Hoon LEE, Ki Jun KIM, Dong Wook ROH, Daewon LEE, Joon Kui AHN
  • Method of allocating uplink transmission channels in a communication system
    Patent number: 9113454
    Abstract: A method of allocating channels in a user equipment is disclosed. In particular, a method of allocating a plurality of Dedicated Physical Channels (DPCHs) and Enhanced Dedicated Channels (E-DCHs) in a user equipment of a multicode transmission system. The method includes determining whether a High Speed Downlink Shared Channel (HS-DSCH) is configured for the user equipment (UE) and determining a number of codes used by the DPCH and the E-DCH. The method further includes allocating the DPCH and the E-DCH channels to an I branch or a Q branch based on the number of codes used by the DPCH and the E-DCH and the HS-DSCH configuration.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: August 18, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Bong Hoe Kim, Joon Kui Ahn, Hak Seong Kim, Dong Wook Roh, Dong Youn Seo, Seung Hwan Won
  • METHOD OF TRANSMITTING PILOT BITS IN A WIRELESS COMMUNICATION SYSTEM
    Publication number: 20150200798
    Abstract: A method of allocating pilot bits in a wireless communication system using a multiple carrier modulation (MCM) is disclosed. The method includes allocating a plurality of precoded data symbols precoded by a precoding matrix module and a plurality of non-precoded pilot bits to a plurality of subcarriers, and transmitting the allocated precoded data symbols and the allocated non-precoded pilot bits.
    Type: Application
    Filed: March 19, 2015
    Publication date: July 16, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Hak Seong KIM, Bong Hoe KIM, Dong Wook ROH, Joon Kui AHN, Dong Youn SEO, Jung Hoon LEE
  • CHANNEL CODING METHOD OF VARIABLE LENGTH INFORMATION USING BLOCK CODE
    Publication number: 20150200687
    Abstract: A method for channel-coding information bits using a code generation matrix including 32 rows and A columns corresponding to length of the information bits includes, channel-coding the information bits having “A” length using basis sequences having 32-bit length corresponding to columns of the code generation matrix, and outputting the channel-coded result as an output sequence. If “A” is higher than 10, the code generation matrix is generated when (A-10) additional basis sequences were added as column-directional sequences to a first or second matrix. The first matrix is a TFCI code generation matrix composed of 32 rows and 10 columns used for TFCI coding. The second matrix is made when at least one of an inter-row location or an inter-column location of the first matrix was changed. The additional basis sequences satisfy a value 10 of a minimum Hamming distance.
    Type: Application
    Filed: March 5, 2015
    Publication date: July 16, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Dong Wook ROH, Joon Kui AHN, Nam Yul YU, Jung Hyun CHO, Yu Jin NOH, Ki Jun KIM, Dae Won LEE
  • Method and apparatus for transceiving a data frame in a wireless LAN system
    Patent number: 9078251
    Abstract: A method of transmitting a data frame by a transmitter in a WLAN system is provided. The method includes generating a data block including at least one data units respectively transmitted through at least one or more spatial streams to at least one receiver, transmitting first control information to the at least one receiver, transmitting second control information to each receiver, and transmitting the data block to the at least one receiver. The first control information includes a length indicator for the data block, a MIMO indicator indicating whether the data block is for SU-MIMO or MU-MIMO, and a spatial stream indication field including information about the number of the spatial streams. The second control information includes a FEC coding field indicating an encoding scheme applied to the data unit and an MCS field indicating an MCS applied to the data unit.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: July 7, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Dong Wook Roh, Byeong Woo Kang, Dae Won Lee, Yong Ho Seok
  • Method for receiving ACK/NACK signal in mobile communication system
    Patent number: 9078247
    Abstract: A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: July 7, 2015
    Assignee: LG Electronics Inc.
    Inventors: Dae Won Lee, Bong Hoe Kim, Young Woo Yun, Ki Jun Kim, Dong Wook Roh, Suk Hyon Yoon, Joon Kui Ahn, Dong Youn Seo, Hak Seong Kim, Jung Hoon Lee, Eun Sun Kim, Sung Duk Choi
  • UPLINK SIGNAL TRANSMISSION AND RECEPTION USING OPTIMIZED RANK 3 CODEBOOK
    Publication number: 20150188735
    Abstract: A method for transmitting and receiving uplink signals using an optimized rank 3 codebook is disclosed. The optimized rank 3 codebook includes 6 precoding matrix groups, each of which has 1 variable having an amplitude of 1. Preferably, the optimized 4Tx rank 3 codebook has 12 precoding matrix, two precoding matrixes are selected from each the above 6 precoding matrix groups considering chordal distance and the number of precoding matrix.
    Type: Application
    Filed: March 12, 2015
    Publication date: July 2, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Yu Jin NOH, Dong Wook ROH, Byeong Woo KANG, Bong Hoe KIM, Dae Won LEE
  • METHOD FOR TRANSMITTING UPLINK SIGNALS
    Publication number: 20150180638
    Abstract: A method for transmitting uplink signals, which include ACK/NACK signals, control signals other than the ACK/NACK signals, and data signals, is disclosed. The method comprises serially multiplexing the control signals and the data signals; sequentially mapping the multiplexed signals within a specific resource region in accordance with a time-first mapping method, the specific resource region including a plurality of symbols and a plurality of virtual subcarriers; and arranging the ACK/NACK signals at both symbols near symbols to which a reference signal of the plurality of symbols is transmitted. Thus, the uplink signals can be transmitted to improve receiving reliability of signals having high priority.
    Type: Application
    Filed: February 25, 2015
    Publication date: June 25, 2015
    Inventors: Dae Won LEE, Bong Hoe KIM, Young Woo YUN, Ki Jun KIM, Dong Wook ROH, Hak Seong KIM, Hyun Wook PARK
  • Method and apparatus for transmitting control information in WLAN system
    Patent number: 9065502
    Abstract: There is provided a method of transmitting control information in a Wireless Local Area Network (WLAN) system, comprising transmitting first control information by means of cyclic shift delay diversity beam-forming and transmitting second control information. The first control information comprises information necessary for each of a plurality of target stations of the second control information to receive the second control information. The second control information beamformed and transmitted to the plurality of target stations.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: June 23, 2015
    Assignee: LG Electronics Inc.
    Inventors: Dae Won Lee, Dong Wook Roh, Byeong Woo Kang, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim
  • METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNALS USING MULTI-ANTENNA
    Publication number: 20150162965
    Abstract: A method and apparatus for allowing a UE to transmit uplink signals using a MIMO scheme are disclosed. In order to maintain good Peak power to Average Power Ratio (PAPR) or Cubic Metric (CM) properties when the UE transmits uplink signals using the MIMO scheme, the UE uses a precoding scheme based on a precoding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission.
    Type: Application
    Filed: February 20, 2015
    Publication date: June 11, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Yu JIN NOH, Ki Jun KIM, Dong Wook ROH, Byeong Woo KANG, Dae Won LEE, Bong Hoe KIM, Dong Youn SEO
  • Transmitting spread signal in communication system
    Patent number: 9048992
    Abstract: A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: June 2, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Jung Hoon Lee, Ki Jun Kim, Dong Wook Roh, Daewon Lee, Joon Kui Ahn
  • Apparatus and method of transmitting and receiving data in soft handoff of a wireless communication system
    Patent number: 9049636
    Abstract: The present invention relates to a method of transmitting and receiving data in soft handoff of a wireless communication system. According to an aspect of the present invention, in the method of receiving data in soft handoff of a wireless communication system, a mobile station receives a first sequence being generated by interleaving transmission data using a first inter leaver pattern, and also receives a second sequence being generated by interleaving the transmission data using a second interleaver pattern. Then, the mobile station combines and decodes the first sequence and the second sequence before receiving an entire frame having the first sequence allocated thereto.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: June 2, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Ki Jun Kim, Byung Kwan Yi, Sang Gook Kim, Dong Wook Roh
  • METHOD AND APPARATUS FOR TRANSMITTING PLCP FRAME IN WIRELESS LOCAL AREA NETWORK SYSTEM
    Publication number: 20150146708
    Abstract: A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.
    Type: Application
    Filed: December 4, 2014
    Publication date: May 28, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Dae Won LEE, Dong Wook ROH, Byeong Woo KANG, Yong Ho SEOK, Yu Jin NOH, Bong Hoe KIM
  • Method and apparatus of transmitting training signal in wireless local area network system
    Patent number: 9042484
    Abstract: A method of transmitting a training signal in a Wireless Local Area Network (WLAN) system includes generating one or more first training signals for a first destination station and one or more second training signals for a second destination station by applying a mapping matrix P to a training signal generation sequence, mapping the first training signals and the second training signals to a plurality of antennas according to an antenna mapping matrix, and performing Inverse Fast Fourier Transform (IFFT) on each of the first training signals and the second training signals mapped to the plurality of antennas and transmitting the training signals through the plurality of antennas.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: May 26, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Byeong Woo Kang, Dong Wook Roh, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim, Dae Won Lee
  • Method for performing retransmission in MIMO wireless communication system and apparatus therefor
    Patent number: 9042314
    Abstract: A method for performing retransmission at a user equipment of a MIMO wireless communication system is disclosed. The method comprises transmitting multiple transport blocks to a base station for a transmission unit time in accordance with uplink grant information, which includes a first new data indicator; receiving ACK/NACK (Acknowledgement/Negative-ACK) responses corresponding to the respective transport blocks and uplink grant information, which includes a second new data indicator, from the base station; and performing new transmission or retransmission for the multiple transport blocks in one transport block unit for a transmission unit time in accordance with the ACK/NACK responses and the second new data indicator, if transport rank is reduced to 1.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: May 26, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Byeong Woo Kang, Dong Wook Roh, Yu Jin Noh, Bong Hoe Kim, Dae Won Lee
  • Method and apparatus for transmitting control information in WLAN system
    Patent number: 9042331
    Abstract: There is provided a method of transmitting control information in a Wireless Local Area Network (WLAN) system, comprising transmitting first control information by means of cyclic shift delay diversity beam-forming and transmitting second control information. The first control information comprises information necessary for each of a plurality of target stations of the second control information to receive the second control information. The second control information beamformed and transmitted to the plurality of target stations.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: May 26, 2015
    Assignee: LG Electronics Inc.
    Inventors: Dae Won Lee, Dong Wook Roh, Byeong Woo Kang, Yong Ho Seok, Yu Jin Noh, Bong Hoe Kim
  • METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION IN A MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM
    Publication number: 20150117563
    Abstract: A method for transmitting channel quality information (CQI) in a MIMO system is provided that allows a receiver to feed back a CQI value to a transmitter. The method includes receiving a transmission (Tx) pilot signal for each Tx antenna from a base station (BS), measuring a first CQI value of a first codeword and a second CQI value of a second codeword based on the pilot signal, and transmitting the first CQI value of the first codeword and the second CQI value of the second codeword to the BS where at least the first or second CQI value includes specific information capable of indicating a transmission restriction status of a corresponding codeword.
    Type: Application
    Filed: January 5, 2015
    Publication date: April 30, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Dong Youn SEO, Bong Hoe KIM, Ki Jun KIM, Hak Seong KIM, Dong Wook ROH