Patents by Inventor Liangming WU

Liangming WU 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).

  • Publication number: 20220006500
    Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may report basis subset selection for a set of beams, where the basis vectors are used for frequency domain compression. To reduce reporting overhead, the UE may transmit two reports indicating the basis vectors. The first report may include first information for the basis vectors and is of a known payload size to both the UE and a base station, while the second report may include second information for the basis vectors and may have a payload size dependent on the first information. The base station may decode the first report and may use the decoded first information to decode the second report. Based on the first and second information, the base station may determine the reported set of basis vectors to use for frequency domain compression and may determine non-zero precoding coefficients.
    Type: Application
    Filed: December 6, 2019
    Publication date: January 6, 2022
    Inventors: Chao WEI, Liangming WU, Chenxi HAO, Qiaoyu LI, Min HUANG
  • Patent number: 11218340
    Abstract: Techniques and apparatus for configuring transmission rank and/or precoder(s) to support uplink non-codebook based transmission are provided. One technique includes receiving sounding reference signal (SRS) resource(s) from a user equipment (UE), where each SRS resource is associated with one or more precoded ports. At least one of a transmission rank or a set of precoders is determined based on the SRS resource(s). An indication of at least one of the SRS resource(s) is signaled to the UE. The UE uses the indication of the at least one of the SRS resource(s) to send an uplink transmission.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: January 4, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Liangming Wu, Yu Zhang, Chenxi Hao, Hao Xu, Wanshi Chen
  • Patent number: 11211978
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, configuration information indicating that the UE is to compress a precoding matrix indicator in connection with channel state information reporting, wherein the precoding matrix indicator is to be compressed based at least in part on a quantization dependency between transmission layers or an orthogonality relationship between the transmission layers, and wherein the configuration information is associated with a type II, higher rank codebook for multiple input multiple output configuration. The UE may transmit, to a base station (BS), the compressed precoding matrix indicator to the base station based at least in part on receiving the configuration information. The UE and BS may use a communication configuration based at least in part on a precoding matrix indicator recovered from the compressed precoding matrix indicator. Numerous other aspects are provided.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: December 28, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Liangming Wu, Yu Zhang, Chao Wei, Qiaoyu Li, Chenxi Hao, Hao Xu
  • Publication number: 20210391910
    Abstract: Certain aspects of the present disclosure provide techniques for reporting channel state information (CSI) with spatial and time domain compression.
    Type: Application
    Filed: October 30, 2019
    Publication date: December 16, 2021
    Inventors: Liangming WU, Chenxi HAO, Qiaoyu LI, Chao WEI, Wanshi CHEN, Joseph Binamira SORIAGA, Yu ZHANG
  • Publication number: 20210384945
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify, based at least in part on a codebook, a set of beams to feedback in a channel state information (CSI) feedback communication, and may identify one or more beam groups associated with the set of beams. The UE may select respective one or more transfer domain bases, from a plurality of transfer domain bases, for each beam group of the one or more beam groups, and may determine a plurality of values, for a plurality of bits, that represent beam group identification information associated with the one or more beam groups and transfer domain basis selection information associated with the respective one or more transfer domain bases. The may transmit, to a base station (BS), the plurality of bits in the CSI feedback communication. Numerous other aspects are provided.
    Type: Application
    Filed: December 12, 2019
    Publication date: December 9, 2021
    Inventors: Qiaoyu LI, Chenxi HAO, Liangming WU, Joseph Binamira SORIAGA, Wanshi CHEN, Peter GAAL
  • Patent number: 11196444
    Abstract: Certain aspects of the present disclosure generally relate to techniques for encoding and decoding bits of information using cyclic redundancy check (CRC) concatenated polar encoding and decoding. The CRC concatenated polar encoding techniques may avoid transmission of dummy bits. A method generally includes obtaining the bits of information to be transmitted. The method includes performing CRC outer encoding of the bits of information using an even-weighted generator polynomial to produce CRC encoded bits. The method includes performing polar inner encoding of the CRC encoded bits to generate a codeword. The method includes discarding a first code bit at a beginning of the codeword. The shortened codeword is transmitted over a wireless medium. In another method, bit-level scrambling is performed on the CRC encoded bits before the polar encoding to avoid generating a dummy bit. In another method, only odd-weighted generator polynomials are selected to avoid generating the dummy bit.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: December 7, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Kai Chen, Liangming Wu, Changlong Xu, Jing Jiang, Hao Xu
  • Publication number: 20210367647
    Abstract: Precoding matrix indicator (PMI) feedback for Type II channel state information (CSI) feedback in new radio (NR) multiple input, multiple output (MIMO) operations is discussed. According to various aspects, a user equipment (UE) determines a plurality of CSI feedback components and identifies a set of discarded ones of these components based on a particular component value of a precoding matrix indicator (PMI) component. The UE may then generate an adjusted CSI report by adjusting how the discarded feedback components are treated. The resulting adjusted CSI report may then be transmitted to a serving base station.
    Type: Application
    Filed: June 8, 2017
    Publication date: November 25, 2021
    Inventors: Liangming Wu, Yu Zhang, Wanshi Chen
  • Publication number: 20210368496
    Abstract: Certain aspects of the present disclosure provide techniques for scheduling hybrid automatic repeat request (HARQ) feedback and controlling the transmit power of the HARQ feedback. An example method generally includes generating a configuration for physical uplink control channel (PUCCH) resource sets assigned to at least one user equipment (UE), wherein each of the PUCCH resources sets comprises PUCCH resources, transmitting the configuration for the PUCCH resource sets to the at least one UE, generating an uplink control reporting indication indicating the PUCCH resources associated with downlink demodulation reference signal (DMRS) port groups, transmitting the uplink control reporting indication, to the at least one UE, for use in reporting uplink control information (UCI), and receiving at least a part of the UCI associated with at least one of the downlink DMRS port groups from the at least one UE via the PUCCH resources indicated in the uplink control reporting indication.
    Type: Application
    Filed: September 19, 2019
    Publication date: November 25, 2021
    Inventors: Qiaoyu LI, Yu ZHANG, Chenxi HAO, Liangming WU, Hao XU, Wanshi CHEN
  • Patent number: 11184116
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may perform a first transmission of a communication that is encoded using a polar coding technique; and perform at least one retransmission of the communication, wherein more resources are allocated for the at least one retransmission than for the first transmission, and wherein the at least one retransmission includes an incremental redundancy version of the communication and a version of the communication for Chase combination. Numerous other aspects are provided.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: November 23, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Jian Li, Changlong Xu, Kai Chen, Liangming Wu, Jing Jiang, Hao Xu
  • Publication number: 20210352695
    Abstract: Certain aspects of the present disclosure provide techniques for indicating a preemption of resources impacting a joint transmission from multiple transmitting entities to a user equipment. The transmitting entities may be associated with a virtual cell ID or a demodulation reference signal (DMRS) port group ID.
    Type: Application
    Filed: September 21, 2019
    Publication date: November 11, 2021
    Inventors: Qiaoyu LI, Chao WEI, Yu ZHANG, Liangming WU, Hao XU, Wanshi CHEN
  • Publication number: 20210351827
    Abstract: Certain aspects of the present disclosure provide techniques for uplink sounding reference signal (SRS) transmission with precoding. A method for wireless communication by a user equipment (UE) includes receiving a SRS configuration that configures one or more SRS resource sets, each resource set including one or more SRS resources, each SRS resource comprising one or more SRS ports. The UE receives a set of precoders via an indicator, the set of precoders including a precoder associated with each SRS resource and determines one or more precoders to apply for one or more SRS transmissions via one or more of the SRS resources.
    Type: Application
    Filed: October 16, 2018
    Publication date: November 11, 2021
    Inventors: Chenxi HAO, Yu ZHANG, Bo CHEN, Ruifeng MA, Pavan Kumar VITTHALADEVUNI, Wanshi CHEN, Qiaoyu LI, Liangming WU
  • Patent number: 11171739
    Abstract: Methods, systems, and devices for wireless communications are described. An encoder of a wireless device may receive a transport block (TB) for transmission and segment the transport block into a set of multiple, smaller data segments that respectively In correspond to a plurality of code blocks of the TB. The encoder may generate a code block level (CB-level) error detection code (EDC) for a subset of the data segments. The encoder may generate a transport block-level (TB-level) EDC for the TB using the data segments. Each of the code blocks (CBs) may be of the same size and may include one of the data segments. A subset of the CBs may include a data segment from the subset of the data segments and one of the CB-level EDCs. The remaining CBs that are not part of the subset may include a remaining data segments and the TB-level EDC.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: November 9, 2021
    Assignee: Qualcomm Incorproated
    Inventors: Changlong Xu, Liangming Wu, Jian Li, Kai Chen, Jing Jiang, Gabi Sarkis, Hao Xu
  • Patent number: 11159295
    Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a base station may implement polar coding to generate codewords for transmission, for example, in a physical broadcast channel (PBCH). The base station may identify a subset of the bandwidth allocated for PBCH transmission (e.g., corresponding to a bandwidth for a synchronization signal), and may assign sub-channels to information bits based on the identified bandwidth subset. The base station may generate a codeword based on the assigned sub-channels, and may map a subset of encoded bits for the codeword to the subset of the bandwidth such that the subset of encoded bits includes bits corresponding to the assigned subchannels for the information bits. A user equipment (UE) may receive the encoded bits in the subset of the bandwidth, and may decode the subset of encoded bits to determine the information bits.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: October 26, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Changlong Xu, Liangming Wu, Kai Chen, Chao Wei, Hao Xu
  • Publication number: 20210328742
    Abstract: Certain aspects of the present disclosure provide techniques for channel state information (CSI) for multiple transmission reception point (multi-TRP) transmission such as non-coherent joint transmission (NCJT), including determining subband sizes for CSI and rules for Part II CSI omission. A method that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration associated with one or more CSI reference signal (RS) resources, each CSI resource including a set of ports or port groups. The UE selects one or more CSI-RS resources for which to report CSI and determines a subband size for sending a CSI report based, at least in part, on payload of the CSI report. In an example method, the UE can determine whether the UE has sufficient resources for the CSI report and omit at least a portion of the CSI based on the determination.
    Type: Application
    Filed: August 23, 2019
    Publication date: October 21, 2021
    Inventors: Chenxi HAO, Yu ZHANG, Liangming WU, Qiaoyu LI, Wanshi CHEN, Peter GAAL
  • Publication number: 20210328718
    Abstract: Wireless devices may use polar codes for encoding transmissions and may support combining transmissions to improve decoding reliability (e.g., by achieving chase combining and incremental redundancy (IR) gains). For example, an encoding device may puncture a set of mother code bits using different puncturing patterns to obtain different redundancy versions for a first transmission and a re-transmission. Each puncturing pattern may correspond to an equivalent decoding performance. In some cases, to obtain equivalent puncture sets, the encoding device may perform punctured index manipulation procedures on an initial puncturing pattern. A punctured index manipulation procedure may involve switching a binary state for a binary bit at a same binary bit index for each puncture index in a puncturing pattern. A device may receive the transmissions generated using the equivalent puncture sets and may combine the information for improved decoding reliability.
    Type: Application
    Filed: October 3, 2019
    Publication date: October 21, 2021
    Inventors: Kai CHEN, Changlong XU, Liangming WU, Jian LI, Hao XU
  • Publication number: 20210328644
    Abstract: Certain aspects of the present disclosure provide techniques for a channel state information (CSI) report configuration for a multiple transmission reception point (TRP) transmission, such as a non-coherent joint transmission (NCJT). A method by a base station (BS) includes providing a user equipment (UE) with a CSI report configuration. The CSI report configuration is associated with one or more CSI reference signal (RS) resources. Each CSI-RS resource comprising a set of ports or port groups. The BS signals the UE to enable the UE to send a CSI report including CSI for more than one CSI-RS resource or for a CSI-RS resource comprising more than one port group and receives a CSI report from the UE.
    Type: Application
    Filed: September 21, 2018
    Publication date: October 21, 2021
    Inventors: Chenxi HAO, Yu ZHANG, Liangming WU, Qiaoyu LI, Wanshi CHEN, Peter GAAL
  • Publication number: 20210321419
    Abstract: A method in accordance with aspects of the disclosure comprises receiving a plurality of downlink control information (DCI) signals, wherein each DCI signal is associated with a Demodulation Reference Signal (DMRS) Port Group (DMRS-PG) of a plurality of DMRS-PGs, and each DCI signal within the plurality of DCI signals contains a DMRS-PG Identifier (DMRS-PGID) identifying the associated DMRS-PG, performing one or more measurements associated with the each DCI signal, and generating a multi-port-group uplink control information (UCI) signal based on the one or more measurements associated with the each DCI, wherein the multi-port-group UCI signal contains an indication of whether the each DCI is successfully received. The indication can be explicitly contained in the UCI, or implicitly realized using scrambling sequences associated with DMRS-PGs to scramble the UCI.
    Type: Application
    Filed: November 1, 2018
    Publication date: October 14, 2021
    Inventors: Qiaoyu LI, Yu ZHANG, Yi HUANG, Chenxi HAO, Liangming WU, Hao XU
  • Publication number: 20210320704
    Abstract: Certain aspects of the present disclosure provide techniques for a channel state information (CSI) report configuration with a codebook list, for example, for non-coherent joint transmission (NCJT). A method for wireless communication that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration is associated with one or more CSI reference signal (RS) resources. Each CSI-RS resource includes a set of ports or port groups. The UE receives a list of codebooks associated with the configuration. The UE determines at least one codebook, from the list of codebooks, to apply for one or more triggered CSI-RS resources.
    Type: Application
    Filed: September 14, 2018
    Publication date: October 14, 2021
    Inventors: Chenxi HAO, Yu ZHANG, Liangming WU, Qiaoyu LI, Wanshi CHEN, Peter GAAL
  • Patent number: 11146296
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an encoding device may determine a least reliable subset of information bits included in a set of information bits that includes a predefined active set of information bits to be encoded; may determine a codeword bit to be added to a codeword based at least in part on the least reliable subset of information bits, wherein adding the codeword bit to the codeword improves reliability of the least reliable subset of information bits; may add the codeword bit to the codeword; and may transmit the codeword. Numerous other aspects are provided.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: October 12, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Kai Chen, Changlong Xu, Liangming Wu, Jing Jiang, Hao Xu
  • Publication number: 20210306102
    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a first decoding result for a plurality of downlink control channels of a diversity enhancement based non-coherent joint transmission communication and a second decoding result for a plurality of data channels corresponding to the plurality of downlink control channels; and selectively provide feedback regarding the first decoding result and feedback regarding the second decoding result, the feedback regarding the first decoding result indicating whether reception of one or more downlink control channels, of the plurality of downlink control channels, is successful, and the feedback regarding the second decoding result indicating whether decoding of a codeword of the plurality of data channels is successful. Numerous other aspects are provided.
    Type: Application
    Filed: August 5, 2019
    Publication date: September 30, 2021
    Inventors: Qiaoyu LI, Chao WEI, Yu ZHANG, Chenxi HAO, Liangming WU, Hao XU