Patents by Inventor Lung-Sheng Tsai

Lung-Sheng Tsai 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).

  • Techniques of CSI feedback with unequal error protection messages
    Patent number: 10469204
    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 determines a plurality of messages containing channel state information to be reported to a base station. The UE also determines a priority level for each of the plurality of messages based on at least one predetermined rule. The UE further selects one or more messages from the plurality of messages based on priority levels of the plurality of messages. The UE then sends the selected one or more messages to the base station.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: November 5, 2019
    Assignee: MEDIATEK INC.
    Inventors: Lung-Sheng Tsai, Weidong Yang
  • Method And Apparatus For Linear Combination Codebook Design And CSI Feedback In Mobile Communications
    Publication number: 20190326965
    Abstract: Techniques and examples pertaining to linear combination codebook design and channel state information (CSI) feedback in mobile communications are described. Frequency-dependent parameterization is supported to reduce signaling overhead in reporting beam selection and to enhance CSI resolution. Additionally, the number of candidates for beam selection depends on the strength of each beam to be selected such that more candidates are considered for a stronger beam than for a weaker beam. Moreover, amplitude quantization and/or phase quantization for beams of different strengths are different to reduce quantization error.
    Type: Application
    Filed: July 4, 2019
    Publication date: October 24, 2019
    Inventors: Weidong Yang, Lung-Sheng Tsai
  • Methods of enabling multiuser superposition transmission
    Patent number: 10454652
    Abstract: Methods of enabling multiuser superposition transmission (MUST) in LTE systems are proposed. MUST operation allows simultaneous transmission for multiple co-channel users on the same time-frequency resources. A higher-layer signaling is used for configuring a UE to enable MUST in each transmission mode (TM). MUST is a sub-TM of each TM. When a UE is configured by higher layer to enable MUST, the UE will monitor new DCI formats supported by the configured TM with new fields carrying scheduling information of another co-channel UE. Dynamic switching between MUST and non-MUST operation is allowed. Mixed transmission schemes and precoders among co-channel UEs are also supported.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: October 22, 2019
    Assignee: HFI Innovation INC.
    Inventors: Lung-Sheng Tsai, Pei-Kai Liao, Yi-Ju Liao, Chien-Hwa Hwang
  • Fast And Reliable Signaling Designs For Mobile Communications
    Publication number: 20190289665
    Abstract: A first network node receives downlink signaling from a second network node in a first occasion, received on a first carrier in a first time slot, and a second occasion, which is received either on the first carrier in a second time slot after the first time slot or on a second carrier in the first time slot or the second time slot. A MAC control element (CE) in the downlink signaling received in the first and second occasions contain a first timing padding value and a second timing padding value, respectively. A predetermined time slot is equally indicated by the first time slot plus the first timing padding value as well as by the second time slot plus the second timing padding value. The first network node effects one or more configurations in the predetermined time slot responsive to receiving the downlink signaling in the first and second occasions.
    Type: Application
    Filed: March 14, 2019
    Publication date: September 19, 2019
    Inventors: Weidong Yang, Chia-Chun Hsu, Yih-Shen Chen, Pavan Santhana Krishna Nuggehalli, Lung-Sheng Tsai, Yuanyuan Zhang
  • Frequency-Selective Precoding For Uplink Transmissions In Mobile Communications
    Publication number: 20190280751
    Abstract: Various examples with respect to frequency-selective precoding for uplink (UL) transmissions in mobile communications are described. A processor of a user equipment (UE) receives signaling from a network node of a wireless network. The processor then performs a codebook-based UL transmission to the network node with frequency-selective precoding in a subband of a plurality of subbands according to the signaling received from the network. For non-codebook-based UL transmissions, the processor performs a non-codebook-based UL transmission of a beamformed sounding reference signal (SRS) to the network node by determining a precoder and performing frequency-selective precoding on the SRS using the precoder with a size of precoder bundling for the frequency-selective precoding in a frequency domain known by the network node.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Inventors: Lung-Sheng Tsai, Chiao-Yao Chuang
  • Overhead Reduction For Linear Combination Codebook And Feedback Mechanism In Mobile Communications
    Publication number: 20190222287
    Abstract: Techniques and examples of overhead reduction for linear combination codebook and feedback mechanism in mobile communications are described. A user equipment (UE) receives from a base station of a network one or more reference signals via a communication link between the UE and the base station. The UE constructs a channel state information (CSI) feedback by utilizing a correlation of channel responses in a frequency domain to reduce feedback overhead. The UE then transmits the CSI feedback to the base station.
    Type: Application
    Filed: March 28, 2019
    Publication date: July 18, 2019
    Inventors: Weidong Yang, Lung-Sheng Tsai, Chien-Yi Wang, Chiao-Yao Chuang, Kuhn-Chang Lin
  • UE CAPABILITY FOR CSI REPORTING
    Publication number: 20190222282
    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, a trigger for reporting M CSI reports, M being an integer greater than 0. The UE determines that P processing units are available for calculation of CSI reports, each of the P processing units indicating a predetermined amount of computing power of the UE. The UE selects N CSI reports from the M CSI reports in accordance with a predetermined rule, N being a maximum integer that allows total processing units assigned for calculation of the N CSI reports to be smaller than or equal to the P processing units. The UE updates the N CSI reports.
    Type: Application
    Filed: January 10, 2019
    Publication date: July 18, 2019
    Inventors: Lung-Sheng TSAI, Weidong YANG
  • TECHNIQUES OF REPORTING MULTIPLE CSI REPORTS ON PUSCH
    Publication number: 20190174483
    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, a trigger for reporting M CSI reports. M is an integer greater than 0. The UE determines a wait time period from a reference point to a time point at which N CSI reports of the M CSI reports are to be transmitted. N is an integer greater than 0 and smaller than or equal to M. The UE determines N respective processing time periods for updating the N CSI reports. The UE determines a maximum processing time period that is the largest among the N respective processing time periods. The UE further determines whether to update the N CSI reports based on the maximum processing time period and the wait time period.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 6, 2019
    Inventors: Lung-Sheng TSAI, Weidong Yang
  • Multi-TRP Interference Control in Wireless Communications
    Publication number: 20190159215
    Abstract: Various examples pertaining to multi-transmit/receive point (TRP) interference control in wireless communications are described. A processor of a user equipment (UE) receives, from a network node, a downlink measurement reference signal and configures an interference measurement resource (IMR) associated with a sounding reference signal (SRS) resource of the UE based on the DL measurement reference signal. The processor measures a channel response of a communication channel between the UE and the network node. The processor also measures an interference using the IMR. The processor then generates a precoder based on the measured channel response and the measured interference. The processor further performs an uplink transmission to the network node using the precoder.
    Type: Application
    Filed: November 14, 2018
    Publication date: May 23, 2019
    Inventors: Chao-Cheng Su, Weidong Yang, Tzu-Han Chou, Lung-Sheng Tsai
  • Overhead reduction for linear combination codebook and feedback mechanism in mobile communications
    Patent number: 10298311
    Abstract: Techniques and examples of overhead reduction for linear combination codebook and feedback mechanism in mobile communications are described. A user equipment (UE) receives from a base station of a network one or more reference signals via a communication link between the UE and the base station. The UE constructs a channel state information (CSI) feedback by utilizing a correlation of channel responses in a frequency domain to reduce feedback overhead. The UE then transmits the CSI feedback to the base station.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: May 21, 2019
    Assignee: MediaTek Inc.
    Inventors: Weidong Yang, Lung-Sheng Tsai, Chien-Yi Wang, Chiao-Yao Chuang, Kuhn-Chang Lin
  • CONTROL INFORMATION FOR CSI ACQUISITION AND BEAM MANAGEMENT
    Publication number: 20190149216
    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 determines that up-link control information for channel state information (CSI) acquisition and up-link control information for beam management is to be transmitted on a same up-link channel. The UE includes the up-link control information for beam management in at least one CSI-acquisition report for reporting the up-link control information for CSI acquisition. The UE sends the at least one CSI-acquisition report to the base station on the up-link channel.
    Type: Application
    Filed: November 15, 2018
    Publication date: May 16, 2019
    Inventors: Lung-Sheng Tsai, Xiu-Sheng Li, Ming-Po Chang, Weidong Yang
  • SEGMENTATION OF CONTROL PAYLOAD FOR CHANNEL ENCODING
    Publication number: 20190149285
    Abstract: A method of wireless communication of a UE is provided. The UE determines K1 information bits carrying one or more CSI reports, the one or more reports including a first CSI report, K1 being an integer greater than 0. The UE selects K2 information bits from the K1 information bits, the K2 information bits excluding a part of information bits of the first CSI report, K2 being an integer greater than 0 and smaller than K1. The UE determines that the K2 information bits are in a first predetermined relationship with a threshold. The UE transmits E2 encoded bits derived from the K2 information bits in a physical up-link channel to a base station, E2 being an integer greater than 0.
    Type: Application
    Filed: November 14, 2018
    Publication date: May 16, 2019
    Inventors: Lung-Sheng TSAI, Xiu-sheng LI, Weidong YANG, Wei-De WU
  • Signal modulation and demodulation for multiuser superposition transmission scheme
    Patent number: 10257013
    Abstract: A method of modulating and demodulating superposed signals for MUST scheme is proposed. A transmitter takes bit sequences intended for multiple receivers under MUST scheme to go through a “bit sequence to constellation points” mapper before entering the modulators to satisfy the Gray coding rule and to achieve high demodulation performance for the receivers. In a first method, each bit sequence is assigned for each constellation point on the constellation map to satisfy one or more conditions under different power split factors. In a second method, the constellation map is divided into sub-regions according to the clustering of the constellation points for bit sequence assignment. A near-UE may use an ML receiver for demodulation and decoding the superposed signal. A far-UE may use an ML receiver or an MMSE receiver for demodulation and decoding the superposed signal.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: April 9, 2019
    Assignee: HFI INNOVATION, INC.
    Inventors: Chien-Hwa Hwang, Yi-Ju Liao, Tsang-Wei Yu, Lung-Sheng Tsai, Tze-Ping Low, Pei-Kai Liao
  • Codebook-Based Uplink Transmission In Wireless Communications
    Publication number: 20190103907
    Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) stores information with respect to a plurality of permutations with respect to a mapping between a plurality of sounding reference signal (SRS) resources and a plurality of antenna ports at the UE. The UE receives signaling from a network node of a wireless network. The signaling contains an index identifying a permutation among the plurality of permutations. The UE performs an uplink transmission of data to the network node using one or more SRS resources of the plurality of SRS resources and one or more antenna ports of the plurality of antenna ports according to the identified permutation.
    Type: Application
    Filed: October 2, 2018
    Publication date: April 4, 2019
    Inventors: Weidong Yang, Tzu-Han Chou, Chao-Cheng Su, Lung-Sheng Tsai, Bo-Si Chen
  • ENCODING AND RESOURCE ALLOCATION FOR CONTROL INFORMATION IN PHYSICAL CHANNEL
    Publication number: 20190104534
    Abstract: A method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE obtains M1 modulated symbols to be transmitted on a selected section of a physical uplink shared channel (PUSCH) of the UE, the M1 modulated symbols being for carrying a first category of uplink information. The UE maps J1 modulated symbols of the M1 modulated symbols to occupy each one of J1 resource elements (REs) that are available, in a consecutive (N1?1) symbol periods of the selected section of the PUSCH, for carrying modulated symbols that carries the first category of uplink information. The UE determines a number S1 based on K1 and a number T1. The UE maps K1 modulated symbols of the M1 modulated symbols to occupy K1 REs of the T1 REs such that two adjacent REs among the K1 REs being separated by at least (S1?1) REs.
    Type: Application
    Filed: October 1, 2018
    Publication date: April 4, 2019
    Inventors: Lung-Sheng Tsai, Xiu-Sheng Li, Weidong Yang
  • Codebook-Based Uplink Transmission In Wireless Communications
    Publication number: 20190089432
    Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) generates a codebook comprising a plurality of precoders. The UE processes information using the codebook and transmits the processed information to a network node of a wireless network. In generating the codebook, the UE selects a candidate precoder from a single-stage codebook or a dual-stage codebook and performs a permutation on the candidate precoder.
    Type: Application
    Filed: September 19, 2018
    Publication date: March 21, 2019
    Inventors: Weidong Yang, Tzu-Han Chou, Chao-Cheng Su, Lung-Sheng Tsai
  • Codebook-Based Uplink Transmission In Wireless Communications
    Publication number: 20190081668
    Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) constructs a precoder to be used to wirelessly communicate with a network node of a wireless network. The UE then performs an uplink (UL) transmission to the network node using the precoder via one or more of a plurality of antennas of the UE.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 14, 2019
    Inventors: Weidong Yang, Lung-Sheng Tsai, Bo-Si Chen
  • Method And Apparatus For Multi-TRP And Multi-Panel Transmission In Wireless Communications
    Publication number: 20190081750
    Abstract: Various solutions with respect to multi-transmission and receiving points (TRP) and multi-panel transmission in wireless communications are described. A processor of a user equipment (UE) associated with a single media access control (MAC) entity receives signaling from a plurality of network nodes of a wireless network. The processor generates at least one feedback responsive to receiving the signaling. The processor transmits the at least one feedback to at least one network node of the plurality of network nodes.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 14, 2019
    Inventors: Weidong Yang, Lung-Sheng Tsai, Bo-Si Chen
  • Codebook-Based Uplink Transmission In Wireless Communications
    Publication number: 20190081671
    Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) receives a first signal from a network node of a wireless network, with the first signal selecting one or more codewords or a codebook from a plurality of different codebooks within a master codebook as allowed precoders at transmission ranks. The UE also receives a second signal from the network node, with the second signal selecting a precoder among the allowed precoders for uplink (UL) transmission. The UE then processes data using the selected precoder and performs an UL transmission of the processed data to the network node.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 14, 2019
    Inventors: Weidong Yang, Chao-Cheng Su, Tzu-Han Chou, Lung-Sheng Tsai, Bo-Si Chen
  • Utilization Of SRS For RPD Calibration In Wireless Communications
    Publication number: 20190081835
    Abstract: Various solutions with respect to relative phase discontinuity (RPD) calibration in wireless communications are described. A user equipment (UE) receives a single trigger signal from a network node of a wireless network. The UE then transmits a plurality of reference signals in sequence to the network node responsive to receiving the single trigger signal. The network node can perform RPD calibration based on relative phase difference between adjacent reference signals in time domain of the plurality of reference signals received from the UE.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 14, 2019
    Inventors: Weidong Yang, Lung-Sheng Tsai, Bo-Si Chen