Patents by Inventor Jiann-Ching Guey

Jiann-Ching Guey 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: 10886958
    Abstract: A method of providing over-the-air assistance information for interference cancellation or suppression to the receiver is proposed. Under a first solution, a two-stage DCI (downlink control information) or SCI (sidelink control information) scheduling method is proposed. The set of first-stage DCI or SCI provides a part of scheduling information which is beneficial for interference cancellation or suppression and is broadcasted by a transmitter or scheduler to all receivers. The set of second-stage DCI or SCI includes the remaining scheduling information and is unicasted by a transmitter or scheduler to each receiver. Under a second solution, assistance information DCI for interference cancellation or suppression is broadcasted by a transmitter or scheduler to all receivers.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: January 5, 2021
    Assignee: MediaTek INC.
    Inventors: Pei-Kai Liao, Chun-Ming Kuo, Chien-Hwa Hwang, Jiann-Ching Guey
  • Patent number: 10887926
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and UE are provided. The UE receive a configuration from a base station, the configuration indicating one or more constraints for constructing and transmitting a multiple-access signature. The UE then constructs the multiple-access signature in accordance with the one or more constraints. The UE autonomously transmits the multiple-access signature to the base station in accordance with the one or more constraints.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: January 5, 2021
    Assignee: MEDIATEK INC.
    Inventors: Jiann-Ching Guey, Chun-Hsuan Kuo
  • Patent number: 10873862
    Abstract: Apparatus and methods are provided using interleaved frequency division multiple access (IFDMA)-based beam management reference signal for TX and RX beam sweeping. In one novel aspect, a set of IFDMA-based BM RS for TX and RX beam sweeping is configured by decomposing a defined reference numerology into N equal-length sub-time units such that the TX and RX beams can switch across sub-time unit boundary. In another novel aspect, a set of IFDMA-based beam management RS for TX and RX beams are configured by concatenating a plurality of IFDMA signals each defined over a corresponding numerology, wherein at least two IFDMA signals have different numerologies. TX and RX beam sweeping are performed based on corresponding TX and RX beam switching points. In another embodiment, the RS is a channel state information RS for a downlink measurement and a sounding reference signal for an uplink measurement.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: December 22, 2020
    Assignee: MediaTek Inc.
    Inventors: Jiann-Ching Guey, Chia-Hao Yu, Weidong Yang
  • Patent number: 10868629
    Abstract: Techniques and examples of channel multiplexing within interlace for New Radio (NR) unlicensed spectrum (NR-U) operation are described. An apparatus (e.g., user equipment (UE)) determines which sub-interlace of multiple sub-interlaces in each of a plurality of interlaces is assigned to the apparatus. The apparatus then performs an uplink (UL) transmission to a wireless network in an NR-U using the assigned sub-interlace in each of the plurality of interlaces. Each of the plurality of interlaces may be divided into respective multiple sub-interlaces with channel multiplexing.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: December 15, 2020
    Assignee: MEDIATEK INC.
    Inventors: Chun-Hsuan Kuo, Jiann-Ching Guey, Chiou-Wei Tsai, Ming-Po Chang, Cheng-Rung Tsai
  • Patent number: 10841926
    Abstract: A method of default uplink beam determination after radio resource control (RRC) connection reestablishment in a beamforming system is proposed. For uplink (UL) transmission, the BS provides dedicated physical uplink control channel (PUCCH) resource configuration to UE. The configuration includes spatial relation information that indicates the spatial domain transmission filter to be used by UE for the corresponding PUCCH transmission. After RRC connection re-establishment and before a dedicated PUCCH configuration is received, a default UE TX beam can be determined based on the UE TX beam used during the RRC connection re-establishment procedure, e.g., the UE TX beam used to transmit MSG3 in a four-step random-access channel (RACH) procedure triggered by the RRC connection re-establishment procedure.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: November 17, 2020
    Assignee: MediaTek INC.
    Inventors: Cheng-Rung Tsai, Ming-Po Chang, Chia-Hao Yu, Weidong Yang, Jiann-Ching Guey
  • Publication number: 20200351890
    Abstract: Aspects of the disclosure provide a method and an apparatus for monitoring physical downlink control channel (PDCCH). For example, the apparatus includes receiving circuitry and processing circuitry. The receiving circuitry can be configured to receive from a base station (BS) a search space set (SSS) and a start triggering signal. The SSS configures one or more PDCCH monitoring occasions. The processing circuitry can be configured to monitor PDCCH according to the SSS during a time window that extends from a start time that is a first time offset after the start triggering signal to an end time that is provided by the BS and/or determined based on a predefined rule.
    Type: Application
    Filed: April 30, 2020
    Publication date: November 5, 2020
    Applicant: MEDIATEK INC.
    Inventors: Cheng-Rung TSAI, Jiann-Ching GUEY
  • Publication number: 20200322988
    Abstract: Examples pertaining to a floating frame-based channel occupancy time (COT) in a fixed frame period (FFP) in mobile communications are described. An apparatus implemented in FBE performs clear channel assessment (CCA) of a channel. The apparatus then transmits during a COT within a FFP in response to the CCA indicating the channel to be clear for transmission.
    Type: Application
    Filed: April 1, 2020
    Publication date: October 8, 2020
    Inventors: Timothy Perrin Fisher-Jeffes, Jiann-Ching Guey
  • Patent number: 10798588
    Abstract: A method of beam reciprocity state reporting and uplink beam management in wireless communication systems with beamforming is proposed. In one novel aspect, a BS configures one or more resource sets to a UE for uplink beam management. The one or more resource sets are allocated for UE to transmit UL reference signals using a number of UE beams. The number of UE beams to be trained is reported by the UE, e.g., via a “UE beam reciprocity state (update)” message. The BS also indicates whether a fixed UE TX beam or which UE TX beam is used for transmission, or indicates whether different UE TX beams are used for transmission of different resources in a resource set. The BS then feedback measurement results for UE to choose a proper TX beam.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: October 6, 2020
    Assignee: MediaTek INC.
    Inventors: Chia-Hao Yu, Ming-Po Chang, Jiann-Ching Guey
  • Publication number: 20200314810
    Abstract: A user equipment terminal (UE) operates in a wireless network according to a configuration. The UE receives the configuration for a physical downlink control channel (PDCCH), and detects downlink control information (DCI) in the PDCCH. From the DCI, the UE receives control information for a serving cell configured with one or more bandwidth units in a frequency domain. The control information is provided for each bandwidth unit of the serving cell. According to the control information, the UE performs a downlink reception from the serving cell or an uplink transmission to the serving cell.
    Type: Application
    Filed: March 19, 2020
    Publication date: October 1, 2020
    Inventors: Cheng-Rung Tsai, Jiann-Ching Guey
  • Publication number: 20200304159
    Abstract: A method of providing over-the-air assistance information for interference cancellation or suppression to the receiver is proposed. Under a first solution, a two-stage DCI (downlink control information) or SCI (sidelink control information) scheduling method is proposed. The set of first-stage DCI or SCI provides a part of scheduling information which is beneficial for interference cancellation or suppression and is broadcasted by a transmitter or scheduler to all receivers. The set of second-stage DCI or SCI includes the remaining scheduling information and is unicasted by a transmitter or scheduler to each receiver. Under a second solution, assistance information DCI for interference cancellation or suppression is broadcasted by a transmitter or scheduler to all receivers.
    Type: Application
    Filed: March 17, 2020
    Publication date: September 24, 2020
    Inventors: Pei-Kai Liao, Chun-Ming Kuo, Chien-Hwa Hwang, Jiann-Ching Guey
  • Patent number: 10779171
    Abstract: A method of beam failure recovery request (BFRQ) transmission is proposed. UE can search for UE-specific control channel in a search space that is signaled specifically for monitoring network response of the BFRQ. Furthermore, configurations indicated specifically for BFRQ can be carried by dedicated signaling such as high-layer radio resource control (RRC) signaling. After successfully rebuilding connection, UE assumes the demodulation reference signal (DMRS) ports of UE-specific control channel to be spatially quasi-co-located (QCL-ed) with the reference signals identified during the beam failure recovery procedure.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: September 15, 2020
    Assignee: MEDIATEK INC.
    Inventors: Chia-Hao Yu, Ming-Po Chang, Chiou-Wei Tsai, Chien-Hwa Hwang, Jiann-Ching Guey
  • Patent number: 10743321
    Abstract: A method of default uplink beam determination after a beam failure recovery (BFR) procedure in a beamforming system is proposed. For uplink (UL) transmission, the BS provides physical uplink control channel (PUCCH) resource configuration to UE. The configuration includes spatial relation information that indicates the spatial filter to be used by UE for the corresponding PUCCCH transmission. After BFR procedure is completed and before the first spatial relation information indication for a PUCCH resource is received by UE, a default UE TX beam for the PUCCH resource can be determined based on the UE TX beam used during the BFR procedure, e.g., the UE TX beam used to transmit a beam failure recovery request (BFRQ) during the BFR procedure.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: August 11, 2020
    Assignee: MEDIATEK INC
    Inventors: Cheng-Rung Tsai, Ming-Po Chang, Chia-Hao Yu, Weidong Yang, Jiann-Ching Guey
  • Patent number: 10736101
    Abstract: A flexible radio frame structure for both FDD and TDD is proposed. Under the flexible frame structure, each radio frame consists of a plurality of slots, and each slot within a radio frame has a flexible slot type. As a basic scheduling unit, each slot can be configured by the base station via physical layer signaling. The slot type can be changed dynamically based on current system needs to support different DL/UL ratios and latency requirements. With the support of different slot types and asynchronous DL/UL HARQ operation, HARQ operation for DL/UL can share the same HARQ timing to simplify the system design and reduce implementation complexity.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: August 4, 2020
    Assignee: MEDIATEK INC.
    Inventors: Pei-Kai Liao, Tao Chen, Jiann-Ching Guey
  • Publication number: 20200228299
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives an indication for transmitting a particular DMRS sequence in an uplink transmission. The particular DMRS sequence is time domain based. The UE determines an adjustment to a base DMRS sequence for generating the particular DMRS sequence. The UE generates the particular DMRS sequence based on the adjustment and the base DMRS sequence. The UE modulates the particular DMRS sequence to obtain a set of symbols. The UE maps a plurality of symbols of the set of symbols to a plurality of subcarriers. The UE transmits the plurality of symbols on the plurality of subcarriers.
    Type: Application
    Filed: January 9, 2020
    Publication date: July 16, 2020
    Inventors: Tzu-Han Chou, Weidong Yang, Chao-Cheng Su, Jiann-Ching Guey
  • Publication number: 20200228270
    Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives an indication for transmitting a particular DMRS sequence in an uplink transmission. The particular DMRS sequence is time domain based. The UE generates the particular DMRS sequence. The UE modulates the particular DMRS sequence to obtain a set of symbols. The UE maps a plurality of symbols of the set of symbols to a plurality of subcarriers. The UE transmits the plurality of symbols on the plurality of subcarriers.
    Type: Application
    Filed: January 9, 2020
    Publication date: July 16, 2020
    Inventors: Tzu-Han CHOU, Weidong YANG, Chao-Cheng SU, Jiann-Ching GUEY
  • Patent number: 10716127
    Abstract: Various solutions with respect to uplink control information (UCI) feedback timing signaling in wireless communications are described. A user equipment (UE) identifies a type of uplink (UL) transmission to perform with respect to a network node of a wireless network. The UE receives a control signal from the network node and determines, based on the control signal, a timing offset of a transmission schedule for the identified type of the UL transmission. The UE performs the UL transmission to the network node according to the transmission schedule such that a first type of the UL transmission is performed with a first timing offset and a second type of the UL transmission is performed with a second timing offset different than the first timing offset.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: July 14, 2020
    Assignee: MEDIATEK INC.
    Inventors: Weidong Yang, Lung-Sheng Tsai, Pei-Kai Liao, Jiann-Ching Guey
  • Patent number: 10674383
    Abstract: A method of beam failure recovery request (BFRQ) transmission is proposed. In a first step of beam failure detection, UE detects a beam failure condition of the original serving beam. In a second step of new candidate beam identification, UE performs measurements for candidate beam selection. In a third step of beam failure recovery request (BFRQ) transmission, UE transmits a BFRQ message to BS upon the triggering condition for BFRQ transmission is satisfied. In a fourth step of monitoring BS response, UE monitors BS response to decide the success or failure of the BFRQ transmission attempt. In one advantageous aspect, the BFRQ transmission is over dedicated contention-free PRACH or PUCCH resources or over contention-based PRACH resources. Furthermore, a beam failure recovery timer is used to oversee the initiation and the termination of the BFRQ transmission.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: June 2, 2020
    Assignee: MEDIATEK INC.
    Inventors: Chia-Hao Yu, Yuanyuan Zhang, Ming-Po Chang, Jiann-Ching Guey
  • Publication number: 20200153581
    Abstract: In one novel aspect, multiple TRPs information are provided for REG bundle configuration with PDCCH transmission and reception with multiple transmission points (TRPs). The UE configures a PDCCH associated with a CORESET comprising multiple CCEs, partitions the CORESET into multiple CCE groups associated with corresponding TCI-state, which corresponds to a source TRP, configures multiple resource element group (REG) bundles each with multiple resource elements (REs), and assumes the same precoder applied on PDCCH DMRS when the REs are in the same REG bundle and are associated with the same source TRP, and wherein each source TRP transmits corresponding portion of DCI data mapping to the corresponding first and second CCE group. In one embodiment, the REG bundles are predefined with each comprises only REs associated with the same source TRP. In another embodiment, each CCE group corresponding to a source TRP is indicated for the REG bundle configurations.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 14, 2020
    Inventors: Lung-Sheng Tsai, Weidong Yang, Jiann-Ching Guey
  • Publication number: 20200153572
    Abstract: In one novel aspect, configurations for PDCCH transmission and reception with multiple transmission points are provided. The UE configures a PDCCH associated with a CORSET comprising multiple CCEs, partitions the CORSET into multiple TCI-state sets, wherein each TCI state set includes multiple CCE groups associated with corresponding TCI-state, which corresponds to a source TRP, activates one TCI state set, and receives DCI via the PDCCH, wherein the PDCCH is transmitted from at least the first source TRP and the second source TRP, and wherein each source TRP transmits corresponding portion of DCI data mapping to the corresponding first and second CCE group. The CORSET is partitioned in FDM or TDM way. In another novel aspect, a first and a second PDCCH associated with a first and a second TRP are configured for repetition transmission. The second PDCCH configuration is dependent upon the first PDCCH configuration.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 14, 2020
    Inventors: Lung-Sheng Tsai, Weidong Yang, Cheng-Rung Tsai, Jiann-Ching Guey, Chia-Hao Yu
  • Publication number: 20200106555
    Abstract: A user equipment (UE) transmits an uplink signal in a wireless network which provides an interlace structure in a frequency domain for uplink transmission. The UE identifies a frequency range which is shared by UEs in the wireless network and is partitioned into N interlaces, N being an integer greater than one. Each interlace is formed by a sequence of resource blocks (RBs) that are non-adjacent and equidistant in frequency. According to a first method, the UE transmits the uplink signal combined with a unique bit sequence to a base station in the wireless network. The transmitted uplink signal spreads across all of the N interlaces. According to a second method, the UE transmits the uplink signal using a different one of the N interlaces in each of N consecutive symbol periods.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 2, 2020
    Inventors: Chun-Hsuan Kuo, Jiann-Ching Guey