Patents by Inventor Taesang Yoo

Taesang Yoo 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).

  • Patent number: 10367530
    Abstract: Techniques are described for wireless communication. One method includes selecting an encoding type for each payload of a plurality of payloads. The selecting includes selecting a low density parity check code (LDPCC) encoding type for at least a first payload and selecting a turbo code (TC) encoding type for at least a second payload. The method also includes segmenting each payload into a plurality of code blocks; generating, for each code block, a cyclic redundancy check (CRC); encoding each code block and associated CRC in one or more codewords of a plurality of codewords, in which the encoding is based at least in part on the selected encoding type for a payload associated with the code block; and transmitting the codewords.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jing Sun, Taesang Yoo, Tao Luo
  • Patent number: 10368336
    Abstract: Methods, systems, and devices are described for evolved multimedia broadcast multicast service (eMBMS) utilizing enhanced component carriers (eCCs). A wireless system may send unicast data using resources allocated for multicast transmissions (e.g., eMBMS transmissions). The presence of unicast data in a transmission time interval (TTI) scheduled for multicast transmission may be indicated by a control region within the TTI. A UE may monitor the control region to identify the presence of unicast information. A TTI scheduled for multicast transmission may also include reference signals to aid in the demodulation of multicast or unicast data. In some cases, the reference signals may be front-loaded at the beginning or embedded within the TTI. The embedded reference signals may be configured based on the type of data carried by the TTI scheduled for multicast transmission, or by length of the cyclic prefix used by the TTI scheduled for multicast transmission.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: July 30, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xiaoxia Zhang, Jun Wang, Taesang Yoo
  • Patent number: 10355728
    Abstract: Cross-operator, cross-link adjacent channel interference with dynamic time division duplex (TDD) is discussed. For a network environment with co-site base stations, base stations attempting to switch the default direction to downlink may monitor for uplink reservations signals transmitted between the neighboring base stations in various ways. For example, the co-site base station may only monitor for an uplink reservation signal on its own channel or may attempt to monitor for the reservation signal in its own channel and adjacent channels. The adjacent base stations may transmit reservation signals in their own channel and the adjacent channels, so that the co-site base station would monitor for the communication intention by monitoring its own channel. Further, each network operator may be assigned a specific symbol location for the reservation signals. Still other aspects provide the neighboring base stations from different operators to pool the channels and transmit according to a shared spectrum.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Seyed Ali Akbar Fakoorian, Xiaoxia Zhang, Taesang Yoo
  • Patent number: 10356626
    Abstract: Wireless communications systems and methods related to reclaiming of resources in a shared frequency spectrum shared by multiple operators are provided. A first wireless communication device associated with a first operator of a plurality of operators identifies a transmission opportunity in a shared frequency spectrum shared by the plurality of operators, wherein the first operator has priority among the plurality of operators for accessing the shared frequency spectrum in the transmission opportunity. The first wireless communication device communicates with a second wireless communication device associated with the first operator, in the transmission opportunity without a prior reservation of the transmission opportunity.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Juan Montojo, Taesang Yoo, Xiaoxia Zhang, Aleksandar Damnjanovic, Siddhartha Mallik
  • Patent number: 10356770
    Abstract: Techniques are described for wireless communication. A method for wireless communication at a base station includes determining a set of physical downlink control channels (PDCCHs) to be transmitted in a control region; transmitting an enhanced physical control format indicator channel (ePCFICH) identifying a quantity of PDCCHs in the set of PDCCHs associated with each aggregation level of at least one aggregation level, and a size of the control region; and transmitting the set of PDCCHs in the control region on a component carrier deployed in a radio frequency spectrum band. A method for wireless communication at a user equipment (UE) device includes receiving the ePCFICH; receiving the control region; and searching for at least one PDCCH within the control region based at least in part on receiving the ePCFICH.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Taesang Yoo, Jing Sun, Xiaoxia Zhang, Juan Montojo
  • Patent number: 10355760
    Abstract: Various aspects described herein relate to small cyclic delay diversity (SCDD) operation used in a wireless communication system (e.g., 5G New Radio). A method, a computer-readable medium, and an apparatus are provided. In an aspect, the method, computer-readable medium, or apparatus operates to identify a type of information for transmission, identify a rank associated with the type of information, and perform an SCDD precoding operation based at least in part on the identified type of information or the rank.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Taesang Yoo, Zhifei Fan, Dinkar Vasudevan, Juan Montojo
  • Patent number: 10341884
    Abstract: Channel clearance using a shared radio frequency spectrum band may be performed for both a base station and a user equipment (UE). A base station may perform a listen before talk (LBT) procedure and verify one or more channels in a shared radio frequency spectrum band are available for transmissions and, if the LBT procedure is successful, transmit a pre-grant transmission to one or more UEs. The UEs may perform an LBT procedure for channel(s) indicated in the pre-grant transmission. If the UE LBT procedure passes, the UE may transmit a channel clearance signal, and may transmit a feedback communication responsive to the pre-grant transmission. The feedback communication may indicate, for example, the pre-grant transmission was received and which of the one or more channels are available based on the LBT procedure. The base station may receive the feedback communication and initiate transmissions to the UE.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: July 2, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jing Sun, Tao Luo, Xiaoxia Zhang, Taesang Yoo, Siddhartha Mallik
  • Patent number: 10333668
    Abstract: Methods, systems, and devices are described for a system that supports wireless communication with a first set of devices using a first OFDM symbol duration associated with a first tone spacing (i.e., a first physical layer (PHY) configuration) and second set of devices using a PHY configuration associated with a second tone spacing. A base station may transmit a set of discovery reference signals (DRS) in a narrowband region of a primary channel of a carrier. The DRS may have the first PHY configuration and a secondary channel of the carrier may support communications using the second PHY configuration. The base station may transmit a first system information (SI) message for one set of devices using the first PHY configuration, and it may transmit a second SI message for another set of devices using the second PHY configuration.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: June 25, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Taesang Yoo, Jing Sun, Siddhartha Mallik, Tao Luo, Peter Gaal, Xiaoxia Zhang, Jun Wang
  • Patent number: 10334447
    Abstract: Methods, systems, and devices for wireless communication are described. Discontinuous reception (DRX) operation may be configured differently on enhanced component carriers (eCCs) than on other component carriers, including a primary cell (PCell). In some cases, a user equipment (UE) may be configured with several different eCC DRX modes. An eCC DRX configuration may, for example, be coordinated with downlink (DL) transmission time interval (TTI) scheduling so each DRX ON duration may correspond to a DL burst duration of the corresponding eCC. The eCC DRX ON durations may also be scheduled according to hybrid automatic repeat request (HARD) process scheduling. In some examples, eCC DRX ON durations may be based on listen-before-talk (LBT) procedures. In some cases, eCC DRX ON durations may be configured to contain an uplink (UL) burst to enable channel state information (CSI) reporting. The eCC DRX may also be configured to minimize interruption of the PCell.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: June 25, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Madhavan Srinivasan Vajapeyam, Jelena Damnjanovic, Aleksandar Damnjanovic, Tao Luo, Jing Sun, Taesang Yoo, Yongbin Wei
  • Patent number: 10333595
    Abstract: Reference signal and transmitter (Tx)/receiver (Rx) precoding for user equipment (UE) multiplexing in new radio (NR) shared spectrum networks is discussed. In certain reference signals, a base station may schedule multiple UEs for transmission of uplink reference signals within an identified subframe. The base station may transmit a reference signal configuration message, wherein the reference signal configuration message includes a transmission sequence identifier identifying a multiplexing for antenna ports assigned for transmission of the uplink reference signals. The multiplexing may be one or both of frequency divisional multiplexing (FDM) and time division multiplexing (TDM) over the identified subframe. Additional reference signals, transmit precoders may be identified by the base station based on channel inversion calculations of the channel matrix determined based on uplink reference signals.
    Type: Grant
    Filed: February 16, 2018
    Date of Patent: June 25, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Seyed Ali Akbar Fakoorian, Xiaoxia Zhang, Taesang Yoo, Siddhartha Mallik, Juan Montojo
  • Patent number: 10326559
    Abstract: A base station may provide both an uplink grant and a downlink grant in a same transmission time interval (TTI), and may provide an indication in the uplink grant that the TTI includes the downlink grant. A user equipment (UE) that receives the uplink grant may provide feedback using identified feedback resources in an uplink shared channel, and other uplink transmissions may be rate matched around the feedback resources in the uplink shared channel. A base station receiving the feedback may monitor the feedback resources to determine whether the downlink grant or one or more of the downlink transmissions were successfully received at the UE. A base station, in some examples, may monitor different sets of resources to determine whether certain of the uplink grant, downlink grant, downlink transmissions associated with the downlink grant, or any combinations thereof, have been successfully received at the UE.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: June 18, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Zhifei Fan, Xiaoxia Zhang, Taesang Yoo, Jing Sun, Juan Montojo
  • Patent number: 10320550
    Abstract: Techniques for estimating and reporting channel quality indicator (CQI) are disclosed. Neighboring base stations may cause strong interference to one another and may be allocated different resources, e.g., different subframes. A UE may observe different levels of interference on different resources. In an aspect, the UE may determine a CQI for resources allocated to a base station and having reduced or no interference from at least one interfering base station. In another aspect, the UE may determine multiple CQI for resources of different types and associated with different interference levels. For example, the UE may determine a first CQI based on at least one first subframe allocated to the base station and having reduced or no interference from the interfering base station(s). The UE may determine a second CQI based on at least one second subframe allocated to the interfering base station(s).
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: June 11, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Alan Barbieri, Parag Arun Agashe, Aleksandar Damnjanovic, Tingfang Ji, Tao Luo, Madhavan Srinivasan Vajapeyam, Yongbin Wei, Hao Xu, Taesang Yoo
  • Publication number: 20190174532
    Abstract: Methods, systems, and devices for wireless communication are described. A base station may employ a multiplexing configuration based on latency and efficiency considerations. The base station may transmit a resource grant, a signal indicating the length of a downlink (DL) transmission time interval (TTI), and a signal indicating the length of a subsequent uplink (UL) TTI to one or more user equipment (UEs). The base station may dynamically select a new multiplexing configuration by, for example, setting the length of an UL TTI to zero or assigning multiple UEs resources in the same DL TTI. Latency may also be reduced by employing block feedback, such as block hybrid automatic repeat request (HARQ) feedback. A UE may determine and transmit HARQ feedback for each transport block (TB) of a set of TBs, which may be based on a time duration of a downlink TTI.
    Type: Application
    Filed: January 11, 2019
    Publication date: June 6, 2019
    Inventors: Jelena Damnjanovic, Taesang Yoo, Siddhartha Mallik, Aleksandar Damnjanovic, Arumugam Chendamarai Kannan, Madhavan Srinivasan Vajapeyam, Durga Prasad Malladi, Yongbin Wei, Tao Luo
  • Patent number: 10313916
    Abstract: Methods, systems, and devices are described for decreasing user plane latency in a wireless communication system. This may include routing a portion of bearer traffic to or from a UE through a local or serving gateway, or within or between base stations, rather than via the core network. In some examples, techniques for selected internet protocol flow ultra-low latency (SIPFULL) for systems in which users may have subscribed to enhanced services may be employed. The network may, for instance, authorize SIPFULL functionalities for UEs per access point name (APN) based on individual services subscribed by the UE to improve overall quality of service (QoS). In some examples, a UEs latency requirements or SIPFULL authorizations may affect mobility operations.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: June 4, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Jun Wang, Ozcan Ozturk, Miguel Griot, Ravindra Manohar Patwardhan, Onkar Jayant Dabeer, Madhavan Srinivasan Vajapeyam, Jelena Damnjanovic, Aleksandar Damnjanovic, Taesang Yoo, Yongbin Wei, Durga Prasad Malladi
  • Patent number: 10305537
    Abstract: Over-the-air phase synchronization for reciprocity-based coordinated multipoint (CoMP) joint transmission is discussed. The base stations of the CoMP group and served user equipment (UEs) transmit phase synchronization reference signals (PSRS). The receiving nodes compute wideband co-phasing values representing the phase difference between pairs of the PSRS over each tone of a whole spectrum band, and slope values based on the per-tone co-phasing values. The UEs feedback the wideband downlink co-phasing value and the downlink slope value. The base stations of the CoMP group determine a phase compensation based on the differences between the slope value calculated by the base station and the slope value reported by the UE, and based on the differences between the wideband co-phasing value calculated by the base station and the wideband co-phasing value reported by the UE. The base station uses the phase compensation to adjust communications by the base stations in the CoMP group.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: May 28, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Zhifei Fan, Taesang Yoo
  • Publication number: 20190150198
    Abstract: New radio (NR) transmission opportunity (TxOP) structure having flexible starting points are disclosed for wireless communications. When a typical listen before talk (LBT) procedure is performed, the transmitting node will not know ahead of time when the LBT will pass and, thus, when data transmissions can start. NR systems may include a mini-slot design for accommodating transmission units smaller than a slot. Aspects of the present disclosure provide for flexibly increasing the number of potential starting transmission boundaries depending on when the LBT pass is detected. Alternative aspects of the present disclosure determine the potential starting transmission points using a mini-slot based design, a floating slot based design, or a punctured slot based design with a code block group (CBG) level retransmission mechanism.
    Type: Application
    Filed: November 7, 2018
    Publication date: May 16, 2019
    Inventors: Jing Sun, Xiaoxia Zhang, Taesang Yoo, Tamer Kadous, Yongbin Wei, Aleksandar Damnjanovic
  • Publication number: 20190150088
    Abstract: Techniques are described herein for using a signal to wake up a user equipment (UE) that is in a low-power mode in a synchronized wireless communication system operating a shared radio frequency spectrum band. Once a base station wins a contention for a transmission opportunity in the shared radio frequency spectrum band, the base station may transmit a single signal before the transmission opportunity. After receiving the signal, the UE may begin monitoring for control information (e.g., control resource sets) associated with slots in the transmission opportunity. If the control information indicates that the content of the slot is for the UE, the UE may monitor the slot for its content.
    Type: Application
    Filed: November 12, 2018
    Publication date: May 16, 2019
    Inventors: Jing Sun, Xiaoxia Zhang, Taesang Yoo, Aleksandar Damnjanovic, Tamer Kadous, Yongbin Wei
  • Patent number: 10285117
    Abstract: Techniques are described for wireless communication. One method for wireless communication at a base station includes contending for access to a shared channel of a shared radio frequency spectrum band, and multiplexing first component carrier (CC) communication windows and second CC communication windows in the shared channel. A duration of orthogonal frequency domain multiplexed (OFDM) symbols of the first CC communication windows may be different from a duration of OFDM symbols of the second CC communication windows, and the multiplexing may occur on the shared channel upon winning contention for access to the shared channel. One method for wireless communication at a user equipment (UE) includes monitoring a shared channel of a shared radio frequency spectrum band for a first CC Listen Before Talk (LBT) frame, and receiving, in a second CC preamble, an indication of the first CC LBT frame.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: May 7, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Taesang Yoo, Hao Xu, Durga Prasad Malladi, Yongbin Wei, Siddhartha Mallik, Jing Sun, Madhavan Srinivasan Vajapeyam, Jun Wang, Tao Luo, Xiaoxia Zhang, Wanshi Chen, Aleksandar Damnjanovic
  • Publication number: 20190132745
    Abstract: Aspects of the disclosure relate to wireless communication systems configured to share a shared spectrum with one or more other systems (e.g., other operator networks utilizing the same radio access technology, and/or other networks utilizing different radio access technologies). Coexistence between the different systems on the shared spectrum may be provided by utilizing a technology-neutral signature waveform such as a signature sequence. A device or system may monitor a shared spectrum channel for the signature waveform, and when detected, may determine whether the shared spectrum is available for that system, or busy as occupied by another system. When the shared spectrum channel is idle, the device or system may reserve the channel by transmitting the signature waveform. Other aspects, embodiments, and features are also claimed and described.
    Type: Application
    Filed: December 18, 2018
    Publication date: May 2, 2019
    Inventors: Jing SUN, Taesang YOO, Xiaoxia ZHANG, Sanaz BARGHI, Juan MONTOJO
  • Publication number: 20190132829
    Abstract: Methods, systems, and devices for wireless communications are described. One method may include determining symbol level scheduling for symbols allocated to a plurality of user equipments (UEs) within a transmission time interval (TTI); transmitting, in a control channel of the TTI, control information indicating the symbol level scheduling; and communicating, in accordance with the symbol level scheduling, the symbols within the TTI in a plurality of beamformed transmissions. Another method may include receiving, by a UE, control information in a control channel of a TTI; processing the control information to determine a subset of symbols of the TTI allocated to the UE, a symbol length or duration of the subset of the symbols allocated to the UE, and symbol level scheduling for the subset of the symbols within the TTI; and receiving the subset of the symbols based on the control information.
    Type: Application
    Filed: September 26, 2018
    Publication date: May 2, 2019
    Inventors: Kapil Bhattad, Ananta Narayanan Thyagarajan, Xiaoxia Zhang, Jing Sun, Taesang Yoo