Patents by Inventor Ho-Kyu Choi

Ho-Kyu 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).

  • Publication number: 20020085659
    Abstract: There is provided a method for generating a stream of N symbols by puncturing a stream of repeated symbols in a system including an encoder for generating a stream of L symbols, a repeater for repeating the stream of L symbols, and a puncturer for puncturing the stream of repeated symbols and generating a stream of N symbols, where N is larger than L.
    Type: Application
    Filed: April 23, 2001
    Publication date: July 4, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Min-Goo Kim, Young-Hwan Lee, Jin-Soo Park, Ho-Kyu Choi
  • Publication number: 20020085619
    Abstract: Disclosed are a method and apparatus for transmitting a time-discontinuous burst pilot channel being dependent on transmission data in a mobile communication system. In the apparatus, a modulator generates a modulated pilot symbol by outputting an input pilot symbol at a designated at least one of phase and on a designated complex channel according to an information bit for determining at least one of the phase and/or the complex channel, and a spreader spreads the modulated pilot symbol from the modulator with an orthogonal code selected among a plurality of orthogonal codes. The burst pilot channel transmits side information being dependent on the transmission data according to the phase, and/or the complex channel and the orthogonal code.
    Type: Application
    Filed: October 22, 2001
    Publication date: July 4, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-Kwon Cho, Ho-Kyu Choi, Sang-Min Bae, Youn-Sun Kim, Jin-Woo Heo, Jong-Yoon Hwang
  • Publication number: 20020082020
    Abstract: The present invention relates to a system for gating a dedicated physical control channel in a mobile communication system. A UTRAN (UMTS Terrestrial Radio Access Network) transmits a gating start command or a gating end command to a UE (User Equipment) through a specific transport format combination indicator symbol according to whether there exists data transmitted over a downlink physical shared channel and a dedicated physical data channel, thereby to start or end gating the dedicated physical control channel.
    Type: Application
    Filed: June 22, 2001
    Publication date: June 27, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-Seok Lee, Ho-Kyu Choi, Sung-Ho Choi, Ki-Ho Jung, Hyun-Woo Lee, Jin-Weon Chang, Kook-Heui Lee, Ju-Ho Lee
  • Publication number: 20020051431
    Abstract: Disclosed is a handover controlling method in an RNC connected to a first Node B and a second Node B in a mobile communication system where a USTS service occurs between the first Node B and a UE within a cell of the first Node B and the UE hands over when the UE is located in a handover area across the cell areas of the first Node B and the second Node B adjacent to the first Node B. The method comprises determining whether the handover for the UE is possible or not; transmitting handover information to the second Node B if the handover is possible; and transmitting a command to the UE through the first Node B, requesting the UE to hand over to the second Node B if the UE receives a response message indicating that the handover is possible from the second Node B.
    Type: Application
    Filed: July 18, 2001
    Publication date: May 2, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-Ho Choi, Hyun-Woo Lee, Seong-III Park, Ho-Kyu Choi
  • Publication number: 20020044591
    Abstract: A transmit diversity system having at least four antennas. A first adder adds a first spread signal obtained by spreading a first symbol pattern with a first orthogonal code to a second spread signal obtained by spreading the first symbol pattern with a second orthogonal code, and transmits the added signal through a first antenna. A second adder adds the first spread signal to a third spread signal obtained by spreading an inverted symbol pattern of the first symbol pattern with the second orthogonal code, and transmits the added signal through a second antenna. A third adder adds a fourth spread signal obtained by spreading a second symbol pattern with the first orthogonal code to a fifth spread signal obtained by spreading the second symbol pattern with the second orthogonal code, and transmits the added signal through a third antenna.
    Type: Application
    Filed: August 22, 2001
    Publication date: April 18, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-Woo Lee, Ho Kyu Choi, Yong-Jun Kwak, Sung-Jin Kim
  • Publication number: 20020039355
    Abstract: A communication method in a mobile communication system in which an access terminal transmits to an access network DRC information indicating a selected one of forward data rates requested by the access terminal is provided. The access network designates a DRC information length DRC Length indicating a number of slots where the DRC information is repeated and transmits the designated DRC information length to the access terminal. The access terminal gates transmission of DRC information to the access terminal at one time slot in every DRC information length received from the access network.
    Type: Application
    Filed: June 21, 2001
    Publication date: April 4, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yu-Suk Yun, Soon-Young Yoon, Hee-Won Kang, Jae-Heung Yeom, Sang-Hyun Yang, Hoon Huh, Youn-Sun Kim, Ho-Kyu Choi, Jae-Sung Jang
  • Publication number: 20020018530
    Abstract: A transmission antenna diversity method, and a base station apparatus and a mobile station apparatus therefor in a mobile communication system are provided. In the transmission antenna diversity method, channel information is measured from signals received through the plurality of antennas used in the base station, and a channel information matrix is output. The channel information matrix is transformed according to a transform matrix composed of a complex basis vector set. Reception power with respect to the plurality of antennas is calculated based on the transformed channel information matrix. Antenna selection information obtained based on the calculated reception power is transmitted to the base station as feedback information for controlling transmission antenna diversity. Therefore, power is equally distributed to transmitting antennas, excellent performance is maintained at a high speed of movement, and reliable channel adaptation is accomplished at a low speed of movement of the mobile station.
    Type: Application
    Filed: July 23, 2001
    Publication date: February 14, 2002
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung-jin Kim, Kwang-bok Lee, Hyeon-woo Lee, Keun-chul Hwang, Ho-kyu Choi, Yong-suk Lee
  • Publication number: 20020018457
    Abstract: Disclosed is a channel allocation method in a CDMA communication system. The method comprises receiving from a UTRAN one SF node CSF,k out of 2m−1 SF nodes (where m is an integer larger than 3) arranged in the form of a tree having a mother node and child nodes; searching a group including the received SF node CSF,k in accordance with Formula (1) below; spreading a signal on a dedicated physical data channel (DPDCH) with an OVSF code corresponding to a selected one of the received SF node and its child nodes in the searched group; and spreading a signal on a dedicated physical control channel (DPCCH) with an OVSF code corresponding to an SF node determined by Formula (2) below based on the received SF node.
    Type: Application
    Filed: January 17, 2001
    Publication date: February 14, 2002
    Inventors: Sung-Ho Choi, Chang-Soo Park, Jae-Yoel Kim, Seong-Ill Park, Ki-Ho Jung, Ho-Kyu Choi, Hyun-Woo Lee, Yong-Jun Kwak, Kook-Heui Lee
  • Publication number: 20020015388
    Abstract: There is provided a reverse data rate determining method in a mobile communication system for high data rate transmission such as an HDR system. An AN within a cell calculates the total load of a reverse link by measuring the total energy of the reverse link from ATs within the cell. The AN calculates the share of each AT in the total reverse link load. If the load share of an AT is greater than a threshold predetermined individually for the AT, the AN determines that the AT should reduce its data rate.
    Type: Application
    Filed: July 5, 2001
    Publication date: February 7, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-Gyun Kim, Ho-Kyu Choi, Jin-Soo Park
  • Publication number: 20020013926
    Abstract: Disclosed is an apparatus for encoding k consecutive inputs indicating a TFCI (Transport Format Combination Indicator) of each of successively transmitted frames into a sequence of m symbols in an NB-TDD (Narrowband-Time Division Duplex) mobile communication system. An encoder encodes the k input bits into a sequence of at least 2n symbols where 2n>m, using an extended Reed-Muller code from a Kasami sequence. A puncturer performs puncturing on the sequence of 2n symbols from the encoder so as to output a sequence of m symbols.
    Type: Application
    Filed: June 12, 2001
    Publication date: January 31, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-Yoel Kim, Hyun-Woo Lee, Seong-III Park, Ho-Kyu Choi
  • Publication number: 20020009129
    Abstract: Disclosed is a method for synchronizing a scrambling code in a CDMA communication system including a UTRAN (UMTS Terrestrial Radio Access Network) and a plurality of user equipments (UEs), using orthogonal codes for identifying the UEs and a single scrambling code for identifying the UTRAN by the UEs, and employing an uplink synchronous transmission scheme (USTS) where the UEs synchronize frames of uplink dedicated physical channels (DPCHs) using the single scrambling code. The UEs receive a reference signal including reference time information provided from the UTRAN and transmit a random access channel (RACH) based on the reference time.
    Type: Application
    Filed: June 25, 2001
    Publication date: January 24, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-Ho Choi, Yong-Jun Kwak, Kook-Heui Lee, Seong-Ill Park, Hyun-Woo Lee, Ho-Kyu Choi
  • Publication number: 20020010893
    Abstract: There is provided an encoding apparatus and method in a CDMA communication system. To encode input information of a k-bit sequence and generate a codeword with length N>(2k−1).
    Type: Application
    Filed: March 21, 2001
    Publication date: January 24, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Jae-Yoel Kim, Hyun-Woo Lee, Soon-Young Yoon, Hee-Won Kang, Ho-Kyu Choi
  • Publication number: 20010053140
    Abstract: A method for broadcasting channel information, available channel and data rate of a base station in a CDMA communication system. The base station receives information indicating that a mobile station has data to transmit, over an access preamble channel. The base station transmits use status information of physical channels and maximum available data rate information on a status indicator channel.
    Type: Application
    Filed: November 29, 2000
    Publication date: December 20, 2001
    Inventors: Sung-Ho Choi, Seong-III Park, Ki-Ho Jung, Hyun-Woo Lee, Kyou-Woong Kim, Ho-Kyu Choi, Sung-Oh Hwang, Chang-Hoi Koo, Sang-Hwan Park, Chang-Soo Park, Jae-Yoel Kim, Hi-Chan Moon
  • Publication number: 20010046220
    Abstract: Disclosed is a method for indicating an end of transmitting data frames in order to enable a UTRAN (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access Network) to assign a common packet channel to another user equipment (UE) in a UE for a CDMA mobile communication system. The UE requests assignment of any one of a number of common packet channels assignable in the UTRAN; the UE is assigned a common packet channel by the UTRAN in response to the to request; the UE sequentially transmits the data frames and their associated control frames over the assigned common packet channel; and the UE transmits at least one control frame, in an appointed field of which a given bit pattern appointed with the UTRAN is registered, in order to inform the UTRAN of an end of data transmission upon completing data transmission through the data frames.
    Type: Application
    Filed: February 20, 2001
    Publication date: November 29, 2001
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang-Hoi Koo, Sung-Ho Choi, Ki-Ho Jung, Hyun-Woo Lee, Ho-Kyu Choi, Kyou-Woong Kim, Sung-Oh Hwang, Seong-Ill Park, Hyun-Jung Mun