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: 11057780
    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, from a base station, one or more downlink reference signals on an unlicensed carrier. The UE determines that the base station occupies the unlicensed carrier for a predetermined first channel occupancy time based on the one or more downlink reference signals. The UE receives, on the unlicensed carrier and in the predetermined first channel occupancy time, a control burst including a plurality of down link control channels. The UE attempts to decode a first down link control channel directed to the UE from the control burst.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: July 6, 2021
    Assignee: MEDIATEK INC.
    Inventors: Chiou-Wei Tsai, Jiann-Ching Guey, Chun-Hsuan Kuo, Cheng-Rung Tsai
  • Patent number: 11039475
    Abstract: Techniques and examples of efficient detection of a transmission session in New Radio unlicensed spectrum (NR-U) are described. An apparatus (e.g., user equipment (UE)) detects presence of an indication from a base station of a wireless network in an NR-U. The apparatus determines that a transmission opportunity (TXOP) follows the indication responsive to the detecting. The apparatus then receives a downlink (DL) transmission in the NR-U from the base station during the TXOP.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: June 15, 2021
    Inventors: Jiann-Ching Guey, Chun-Hsuan Kuo, Chien-Hwa Hwang, Chiou-Wei Tsai, Ming-Po Chang
  • Publication number: 20210153150
    Abstract: The scheduling flexibility of CSI reference signals enables time and frequency synchronization using multiple non-zero CSI-RSs transmitted in the same subframe, or using CSI-RSs transmitted in the same subframe with other synchronization signals. Also, multiple synchronization signals may be scheduled in the same subframe to enable fine time and frequency synchronization without cell-specific reference signals.
    Type: Application
    Filed: January 27, 2021
    Publication date: May 20, 2021
    Inventors: Havish Koorapaty, Mattias Frenne, Daniel Larsson, Jiann-Ching Guey, Jung-Fu Cheng
  • Publication number: 20210083704
    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: December 1, 2020
    Publication date: March 18, 2021
    Inventors: Pei-Kai Liao, Chun-Ming Kuo, Chien-Hwa Hwang, Jiann-Ching Guey
  • Patent number: 10952172
    Abstract: The scheduling flexibility of CSI reference signals enables time and frequency synchronization using multiple non-zero CSI-RSs transmitted in the same subframe, or using CSI-RSs transmitted in the same subframe with other synchronization signals. Also, multiple synchronization signals may be scheduled in the same subframe to enable fine time and frequency synchronization without cell-specific reference signals.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: March 16, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Havish Koorapaty, Mattias Frenne, Daniel Larsson, Jiann-Ching Guey, Jung-Fu Cheng
  • Publication number: 20210068128
    Abstract: An apparatus (e.g., a user equipment (UE)) maps a plurality of mutually orthogonal sequences to each of a plurality of physical resource blocks (PRBs) within an interlace. The apparatus then performs a physical uplink control channel (PUCCH) transmission in a New Radio unlicensed spectrum (NR-U). The apparatus also receives an assignment of a set of sequences for each PRB of the plurality of PRBs from a wireless network. In response, the apparatus performs an uplink control information (UCI) transmission via the PUCCH in the NR-U.
    Type: Application
    Filed: August 11, 2020
    Publication date: March 4, 2021
    Inventors: Chun-Hsuan Kuo, Jiann-Ching Guey, Chiou-Wei Tsai, Cheng-Rung Tsai
  • Publication number: 20210051498
    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, through a non-physical layer signaling, a configuration indicating to receive a first reference signal in a set of OFDM symbols in a first slot. The UE attempts to detect a physical layer signaling in the first slot or in a second slot prior to the first slot. The UE refrains from conducting measurements of the first reference signal, when the physical layer signaling is detected by the UE and includes a first indication.
    Type: Application
    Filed: July 16, 2020
    Publication date: February 18, 2021
    Inventors: Chiou-Wei Tsai, Jiann-Ching Guey, Hsuan-Li Lin, Chun-Hsuan Kuo
  • Patent number: 10903877
    Abstract: Apparatus and methods are provided for initial access in the multi-beam operation. In one novel aspect, the UE receives multiple response messages and selects one message as the response message. In one embodiment, the UE selects a subset of a configured UL resources, transmits a first message, wherein the first message is transmitted one or more times on each of the selected set of UL resources, receives one or more first-message-response messages from the BS, and selects one response message, wherein the selected response message indicates a corresponding BS RX resource, which is used by the UE for subsequent communication with the BS. In one embodiment, the selection of UL resources is at least based on transmitting spatial characteristics of the BS, the UE or both, which indicates whether the BS/UE is reciprocal, partial reciprocal or non-reciprocal.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: January 26, 2021
    Assignee: MEDIATEK INC.
    Inventors: Chia-Hao Yu, Yuanyuan Zhang, Ming-Po Chang, Guo Hau Gau, Jiann-Ching Guey
  • 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