Patents by Inventor Won-Joon Choi

Won-Joon 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).

  • METHODS AND APPARATUS FOR PERFORMING RANDOM ACCESS CHANNEL PROCEDURES
    Publication number: 20150016352
    Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for performing random access channel (RACH) procedures with a base station. For example, certain aspects provide methods and apparatus for performing RACH procedures when a user equipment moves out of range from the base station (e.g., for RACH procedure success). One method includes attempting a RACH procedure with a first base station, determining the UE is out of range from the first base station for RACH procedure success, and, upon determining the UE is out of range from the first base station for RACH procedure success, reattempting the RACH procedure with the first base station or a second base station.
    Type: Application
    Filed: July 7, 2014
    Publication date: January 15, 2015
    Inventors: Dominique Francois BRESSANELLI, Won-Joon CHOI, Jong Hyeon PARK
  • Repetition coding for a wireless system
    Patent number: 8923421
    Abstract: A system and method are disclosed for transmitting data over a wireless channel. In some embodiments, transmitting data includes receiving convolutionally encoded data and enhancing the transmission of the data by further repetition encoding the data.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: December 30, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Won-Joon Choi, Qinfang Sun, Jeffrey M. Gilbert
  • CHANNEL ESTIMATION WITH DISCONTINUOUS PILOT SIGNALS
    Publication number: 20140341326
    Abstract: Methods, systems, and apparatuses to estimate a channel with discontinuous instances of a pilot signal. A pilot signal is received during a first and second time period. The time periods are separated by a blank period. The pilot signal is not received during the blank period. A pilot signal received during the second time period is combined with a pilot signal received during the first time period. A channel estimate is based on the combination. According to a second method, pilot signals are received. A first and second channel estimate is calculated based on the pilot signals. Data symbols are received following the pilot signals. A third channel estimate is extrapolated from the channel estimates. This channel estimate corresponds to a virtualized instance of the pilot signal. The data symbols are interpolated based on the second and third channel estimates.
    Type: Application
    Filed: May 16, 2014
    Publication date: November 20, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Jun Won Choi, Won-Joon Choi
  • USER EQUIPMENT PANIC STATES(S) UNDER CONNECTED MODE DISCONTINUOUS RECEPTION STATE IN LONG TERM EVOLUTION
    Publication number: 20140335863
    Abstract: Certain aspects of the present disclosure relate to methods and apparatus for wireless communication, and more particularly, to methods and apparatus that utilize one or more user equipment (UE) panic states under connected discontinuous reception (C-DRX) mode in long term evolution (LTE).
    Type: Application
    Filed: May 6, 2014
    Publication date: November 13, 2014
    Applicant: QUALCOMM Incorporated
    Inventors: Yongle WU, Shivratna Giri SRINIVASAN, Won-Joon CHOI, Raghu Narayan CHALLA, Amir AMINZADEH GOHARI, Mariam MOTAMED, Thomas James CHRISTOL, Amit MAHAJAN
  • Magnetic tunnel junction device and method for fabricating the same
    Patent number: 8878319
    Abstract: A magnetic tunnel junction device includes a first electrode having a curved top surface, a magnetic tunnel junction layer formed along the top surface of the first electrode, and a second electrode formed on the magnetic tunnel junction layer.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: November 4, 2014
    Assignee: SK Hynix Inc.
    Inventor: Won Joon Choi
  • MAGNETIC TUNNEL JUNCTION DEVICE AND METHOD FOR FABRICATING THE SAME
    Publication number: 20140299952
    Abstract: A magnetic tunnel junction device includes a first electrode having a curved top surface, a magnetic tunnel junction layer formed along the top surface of the first electrode, and a second electrode formed on the magnetic tunnel junction layer.
    Type: Application
    Filed: June 18, 2014
    Publication date: October 9, 2014
    Inventor: Won Joon CHOI
  • Magnetic resistance memory apparatus having multi levels and method of driving the same
    Patent number: 8848435
    Abstract: A magnetic resistance memory apparatus capable of implementing various levels and a method of driving the same are provided. The magnetic resistance memory apparatus includes a first magnetic device that includes a fixed layer having a fixed magnetization direction, a tunnel layer disposed on the fixed layer, and a first free layer disposed on the tunnel layer having a variable magnetization direction, and a second magnetic device disposed on the first magnetic device including a plurality of free layers insulated with a spacer layer interposed.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: September 30, 2014
    Assignee: SK hynix Inc.
    Inventor: Won Joon Choi
  • Magnentic resistance memory apparatus having multi levels and method of driving the same
    Patent number: 8842466
    Abstract: A magnetic resistance memory apparatus capable of implementing various levels and a method of driving the same are provided. The magnetic resistance memory apparatus includes a first magnetic device that includes a fixed layer having a fixed magnetization direction, a tunnel layer disposed on the fixed layer, and a first free layer disposed on the tunnel layer having a variable magnetization direction, and a second magnetic device disposed on the first magnetic device including a plurality of free layers insulated with a spacer layer interposed.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: September 23, 2014
    Assignee: SK Hynix Inc.
    Inventor: Won Joon Choi
  • Apparatus and method for adaptively enabling discontinuous transmission (DTX) in a wireless communication system
    Patent number: 8774074
    Abstract: Apparatus and methods are disclosed for gating reverse link transmissions of ¼ rate, ½ rate, ¾ rate, and/or full rate frames in a wireless communication system, such that an access terminal can reduce its power consumption. The gating or discontinuous transmission (DTX) of the reverse link transmission may be conditionally applied based on factors such as the state of the access terminal, the filtered average power of gated the transmissions, or other factors. Further, the gating utilizes a pattern configured to be orthogonal to a pattern utilized for 1x smart blanking, and further configured not to interrupt forward link or reverse link power control signaling. Other aspects, embodiments, and features are also claimed and discussed.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: July 8, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Won-Joon Choi, Rashid Ahmed Akbar Attar, Jun Hu
  • SEMICONDUCTOR FABRICATING DEVICE AND METHOD FOR DRIVING THE SAME, AND METHOD FOR FABRICATING MAGNETIC TUNNEL JUNCTION USING THE SAME
    Publication number: 20140038313
    Abstract: In a method for fabricating a magnetic tunnel junction, a first magnetic layer is formed on a substrate, and a tunnel insulating layer is formed on the first magnetic layer. Subsequently, a second magnetic layer is formed on the tunnel insulating layer. In the method, the first magnetic layer is formed by periodically sputtering a magnetic target while a metal target is continuously sputtered.
    Type: Application
    Filed: October 11, 2013
    Publication date: February 6, 2014
    Applicant: SK hynix Inc.
    Inventor: Won Joon CHOI
  • METHOD AND APPARATUS FOR TDD VIRTUAL CELL SELECTION
    Publication number: 20140029483
    Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE. The UE may search for one or more cells during each of a number of search periods, select a first cell that has been detected in at least two of the search periods, and determine an LNA gain based on information associated with the first cell.
    Type: Application
    Filed: March 15, 2013
    Publication date: January 30, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventors: Raghu Narayan CHALLA, Jun Won CHOI, Won Joon CHOI, Fan WANG, Yongle WU, Lei KE
  • MAGNENTIC RESISTANCE MEMORY APPARATUS HAVING MULTI LEVELS AND METHOD OF DRIVING THE SAME
    Publication number: 20140021568
    Abstract: A magnetic resistance memory apparatus capable of implementing various levels and a method of driving the same are provided. The magnetic resistance memory apparatus includes a first magnetic device that includes a fixed layer having a fixed magnetization direction, a tunnel layer disposed on the fixed layer, and a first free layer disposed on the tunnel layer having a variable magnetization direction, and a second magnetic device disposed on the first magnetic device including a plurality of free layers insulated with a spacer layer interposed.
    Type: Application
    Filed: September 24, 2013
    Publication date: January 23, 2014
    Applicant: SK hynix Inc.
    Inventor: Won Joon CHOI
  • MAGNENTIC RESISTANCE MEMORY APPARATUS HAVING MULTI LEVELS AND METHOD OF DRIVING THE SAME
    Publication number: 20140021567
    Abstract: A magnetic resistance memory apparatus capable of implementing various levels and a method of driving the same are provided. The magnetic resistance memory apparatus includes a first magnetic device that includes a fixed layer having a fixed magnetization direction, a tunnel layer disposed on the fixed layer, and a first free layer disposed on the tunnel layer having a variable magnetization direction, and a second magnetic device disposed on the first magnetic device including a plurality of free layers insulated with a spacer layer interposed.
    Type: Application
    Filed: September 24, 2013
    Publication date: January 23, 2014
    Applicant: SK hynix Inc.
    Inventor: Won Joon CHOI
  • MAGNENTIC RESISTANCE MEMORY APPARATUS HAVING MULTI LEVELS AND METHOD OF DRIVING THE SAME
    Publication number: 20140022838
    Abstract: A magnetic resistance memory apparatus capable of implementing various levels and a method of driving the same are provided. The magnetic resistance memory apparatus includes a first magnetic device that includes a fixed layer having a fixed magnetization direction, a tunnel layer disposed on the fixed layer, and a first free layer disposed on the tunnel layer having a variable magnetization direction, and a second magnetic device disposed on the first magnetic device including a plurality of free layers insulated with a spacer layer interposed.
    Type: Application
    Filed: September 25, 2013
    Publication date: January 23, 2014
    Applicant: SK hynix Inc.
    Inventor: Won Joon CHOI
  • Middle and large-sized battery module having electrode terminal connecting member and insulating joint member
    Patent number: 8623541
    Abstract: Disclosed herein is a middle- or large-sized battery module having a structure in which two or more plate-shaped secondary battery cells (‘battery cells’) are arranged in a lateral direction thereof, wherein the battery cells have electrode terminals arranged in the same direction, plate-shaped electrode terminal connecting members to electrically connect the battery cells to one another are electrically connected to oriented surfaces of the electrode terminals of the battery cells, each of the electrode terminal connecting members is provided at a top and/or bottom thereof with a coupling structure to interconnect electrode terminal connecting members, and at least one end of an insulating joint member coupled in the coupling structure is supported by a module case.
    Type: Grant
    Filed: March 7, 2009
    Date of Patent: January 7, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Won Joon Choi, Youngsun Park, John E. Namgoong, SooRyoung Kim, Myung Hwan Kim
  • APPARATUS, METHOD AND COMPUTER READABLE RECORDING MEDIUM FOR PROVIDING MUSIC RELATED INFORMATION BY RECOGNITION OF MUSIC OUTPUT THROUGH TELEVISION
    Publication number: 20140007171
    Abstract: Disclosed herein is an apparatus and method for providing music related information by searching audio DNA information related to music output through, for example, a TV. The method including: receiving an audio DNA and broadcasting information of broadcasted music; identifying, using the music search server, the broadcasted music by determining whether the received broadcasting information matches music information and broadcast time of one of a plurality of broadcasting programs or advertisements, and comparing, when the determining fails to match the broadcasted music, the received audio DNA with audio DNA of the music pieces to identify the broadcasted music; searching detailed information on music identified by the audio DNA searcher; and transmitting the detailed information search result.
    Type: Application
    Filed: June 26, 2013
    Publication date: January 2, 2014
    Inventors: Byoung Seok YANG, Man Ho WON, Sae Rin KIM, Won Joon CHOI
  • Multiple-input multiple-output system and method
    Patent number: 8599953
    Abstract: A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: December 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Qinfang Sun, Won-Joon Choi, Jeffrey M. Gilbert, Ardavan Maleki Tehrani
  • Magnetic resistance memory apparatus having multi levels and method of driving the same
    Patent number: 8593863
    Abstract: A magnetic resistance memory apparatus capable of implementing various levels and a method of driving the same are provided. The magnetic resistance memory apparatus includes a first magnetic device that includes a fixed layer having a fixed magnetization direction, a tunnel layer disposed on the fixed layer, and a first free layer disposed on the tunnel layer having a variable magnetization direction, and a second magnetic device disposed on the first magnetic device including a plurality of free layers insulated with a spacer layer interposed.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 26, 2013
    Assignee: Hynix Semiconductor Inc.
    Inventor: Won Joon Choi
  • Semiconductor fabricating device and method for driving the same, and method for fabricating magnetic tunnel junction using the same
    Patent number: 8580582
    Abstract: In a method for fabricating a magnetic tunnel junction, a first magnetic layer is formed on a substrate, and a tunnel insulating layer is formed on the first magnetic layer. Subsequently, a second magnetic layer is formed on the tunnel insulating layer. In the method, the first magnetic layer is formed by periodically sputtering a magnetic target while a metal target is continuously sputtered.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: November 12, 2013
    Assignee: Hynix Semiconductor Inc.
    Inventor: Won Joon Choi
  • METHOD AND APPARATUS FOR ADAPTIVE RECEIVE DIVERSITY CONTROL FOR POWER REDUCTION
    Publication number: 20130242772
    Abstract: Methods and devices performing the method for wireless communications are disclosed, where the method includes retrieving historical communications information for a plurality of receive chains for receiving communications from a wireless node; determining a number of receive chains from the plurality of receive chains to enable in a discontinuous reception mode based on the historical communications information; and enabling the number of receive chains to receive a communication from the wireless node in a communications cycle. Other aspects, embodiments, and features are also claimed and described.
    Type: Application
    Filed: September 13, 2012
    Publication date: September 19, 2013
    Applicant: Qualcomm Incorporated
    Inventors: Rashid Ahmed Akbar Attar, Jing Sun, Won-Joon Choi, Christopher Gerard Lott