公开(公告)号：US11451279B2

公开(公告)日：2022-09-20

申请号：US16650171

申请日：2018-09-29

申请人： QUALCOMM Incorporated

发明人： Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Chao Wei ,  Wanshi Chen

IPC分类号： H04W4/00 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0456

摘要： Certain aspects of the present disclosure generally relate to methods and apparatus for generating and reporting CSI.

公开(公告)号：US11381289B2

公开(公告)日：2022-07-05

申请号：US16640150

申请日：2018-09-11

申请人： QUALCOMM Incorporated

发明人： Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Chao Wei ,  Wanshi Chen ,  Hao Xu

IPC分类号： H04B7/04 ,  H04B7/0456 ,  H04B7/06

摘要： Aspects of the present disclosure relate to techniques for codebook subset restriction (CSR). In some cases, a user equipment (UE) receives, from a network entity, codebook subset restriction (CSR) information. The UE determines, based on the CSR information, a restricted beam set for a plurality of antenna panels, determines precoding matrix indicator (PMI) feedback for the antenna panels subject to restricted beam set, and provides the PMI feedback to the network entity.

公开(公告)号：US11258568B2

公开(公告)日：2022-02-22

申请号：US16652614

申请日：2018-09-29

申请人： QUALCOMM Incorporated

发明人： Liangming Wu ,  Chao Wei ,  Yu Zhang ,  Chenxi Hao

IPC分类号： H04L5/00 ,  H04B7/0456 ,  H04L1/00

摘要： Certain aspects of the present disclosure generally relate to methods and apparatus for generating and encoding bits of CSI report. In some cases, a UE may determine a payload size for channel state information (CSI) reporting based, at least in part, on a supported rank, calculate a packet length for the CSI reporting based on the determined payload size, and encode the CSI for a selected CSI resource index (CRI), based on the payload size and the calculated packet length, to generate a coded packet.

公开(公告)号：US11239947B2

公开(公告)日：2022-02-01

申请号：US17178012

申请日：2021-02-17

申请人： Qualcomm Incorporated

发明人： Jing Jiang ,  Gabi Sarkis ,  Yang Yang ,  Shrinivas Kudekar ,  Joseph Binamira Soriaga ,  Hari Sankar ,  Changlong Xu ,  Chao Wei

IPC分类号： H04L27/06 ,  H04L1/00

摘要： Methods, systems, and devices for encoding and decoding are described. To encode a vector, an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups. The groups may vary in size and allocation of the information bits is based on a base sequence of a given length. During decoding, a decoder assigns different bit types to channels instances by dividing a codeword into a plurality of groups and assigning bit types to channel instances of the plurality of groups using the base sequence.

公开(公告)号：US11233554B2

公开(公告)日：2022-01-25

申请号：US16822711

申请日：2020-03-18

申请人： QUALCOMM Incorporated

发明人： Chao Wei ,  Yu Zhang ,  Wanshi Chen ,  Peter Gaal

IPC分类号： H04L23/02 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/08 ,  H04L1/00

摘要： Channel state information (CSI) operations are disclosed with regard to elevation beamforming (EB)/full dimension (FD) multiple input, multiple output (ED/FD-MIMO) operations. With CSI processing associated with multiple CSI-reference signal (CSI-RS) resources, ambiguities may arise in determining the CSI reporting type and rank. CSI reporting type may be determined using a last reported beam selection indicator (BI) or, in the absence of a BI, may be determined according to a predefined rule. When rank and BI are reported separately and rank is absent, user equipment may determine a default reference rank for CSI reporting based on either or both of previously reported rank or BI. When rank and BI are jointly reported, encoding schemes with fixed bitwidths determined based on either CSI-RS processes or resources may be used to enhance decoding. CSI-RS antenna ports, processes, or resources may also be used in determining application of CSI processing relaxation.

公开(公告)号：US11218177B2

公开(公告)日：2022-01-04

申请号：US16317395

申请日：2017-06-12

申请人： QUALCOMM Incorporated

发明人： Changlong Xu ,  Jian Li ,  Chao Wei ,  Jilei Hou

IPC分类号： H03M13/00 ,  H03M13/13 ,  H03M11/26

摘要： Various aspects of the disclosure relate to rate matching techniques for block encoding. In some aspects, a decision regarding whether to use repetition-based rate matching or puncture-based rate matching is made based on a block size of information being encoded. In some aspects, repetition-based rate matching uses a bit-reversal permutation technique.

公开(公告)号：US11212787B2

公开(公告)日：2021-12-28

申请号：US16627953

申请日：2018-08-09

申请人： QUALCOMM Incorporated

发明人： Chao Wei ,  Hao Xu ,  Wanshi Chen ,  Alberto Rico Alvarino

IPC分类号： H04W72/04

摘要： Enhanced Machine Type Communications (eMTC) is a wireless communication technology with reduced system bandwidth. To improve spectral efficiency, user equipment (UE) is configured to receive first downlink control information (DCI) from a base station. The first DCI indicates a resource block (RB) sized frequency allocation for the UE. Additionally, the UE is configured to receive second DCI from the base station. The second DCI indicates a sub RB sized frequency allocation for the UE. The UE is configured to transmit a plurality of uplink data transmissions to the base station in a variable frequency allocation such that the plurality of uplink data transmissions switches between using the RB sized frequency allocation and the sub RB sized frequency allocation. Thus, by using the sub RB sized frequency allocation, more UEs can be allocated to the same RB without lowering the data rate thereby improving total uplink capacity.

公开(公告)号：US11211978B2

公开(公告)日：2021-12-28

申请号：US16964519

申请日：2019-01-25

申请人： QUALCOMM Incorporated

发明人： Liangming Wu ,  Yu Zhang ,  Chao Wei ,  Qiaoyu Li ,  Chenxi Hao ,  Hao Xu

IPC分类号： H04B7/04 ,  H04B7/0456 ,  H04B7/06

摘要： 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.

公开(公告)号：US11159295B2

公开(公告)日：2021-10-26

申请号：US16645815

申请日：2018-08-27

申请人： Qualcomm Incorporated

发明人： Changlong Xu ,  Liangming Wu ,  Kai Chen ,  Chao Wei ,  Hao Xu

IPC分类号： H04L5/00 ,  H04L1/00

摘要： 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.

公开(公告)号：US11139875B2

公开(公告)日：2021-10-05

申请号：US16060726

申请日：2016-11-07

申请人： QUALCOMM Incorporated

发明人： Chao Wei

IPC分类号： H04B7/06 ,  H04L1/00 ,  H04L5/00 ,  H04L1/20 ,  H04B7/04 ,  H04B7/0456 ,  H04B7/0452 ,  H04L5/14

摘要： Dynamic reconfiguration of CSI-RS resources for CSI reporting is described for full dimension multiple input, multiple output (FD-MIMO) systems. While a larger number of channel state information (CSI) reference signal (CSI-RS) resources with independent resource configuration are configured and associated with a CSI process, only a subset of resources that are activated by additional signaling are used for CSI measurement and reporting. The set of activated CSI-RS resources may include only a single CSI-RS resource. Both periodic and aperiodic CSI reporting may then be based on the same set of the activated CSI-RS resources. Medium access control (MAC) control elements may be used to provide activation/deactivation of the CSI-RS resources. Additionally, CSI reporting may be based on both the activated CSI-RS resources and the associated number of antenna ports.