公开(公告)号：US20210281448A1

公开(公告)日：2021-09-09

申请号：US17259207

申请日：2019-07-23

Applicant: Qiaoyu LI ,  Yu ZHANG ,  Chao WEI ,  Chenxi HAO ,  Liangming WU ,  Hao XU ,  Qualcomm Incorporated

Inventor： Qiaoyu LI ,  Yu ZHANG ,  Chao WEI ,  Chenxi HAO ,  Liangming WU ,  Hao XU

IPC: H04L25/02 ,  H04B7/0404 ,  H04B7/0456 ,  H04L5/00 ,  H04W8/24 ,  H04W72/04

Abstract: A base station may determine co-phase information and uplink precoding information (e.g., user equipment (UE) precoder information) based on one or more received sounding reference signals (SRSs) from a UE. The UE may adjust precoders or co-phase for different SRS transmissions over the one or more configured SRS resources. As such, the base station may indicate either co-phase information or uplink precoding information via an SRS resource indicator (SRI), and may transmit an explicit indication of the remaining co-phase information or uplink precoding information in addition to the SRI. In other examples (e.g., when only a single SRS resource is configured), the base station may transmit an index corresponding to uplink precoding information, as well as a separate indication of co-phase information. In some cases, a port selection pattern may be included with an explicit indication, indicating a selection of antenna port indices the precoder or co-phase index applies to.

公开(公告)号：US20210195597A1

公开(公告)日：2021-06-24

申请号：US16768677

申请日：2018-11-05

Applicant: Liangming WU ,  Yu ZHANG ,  Chao WEI ,  Chenxi HAO ,  Joseph Binamira SORIAGA ,  Amir AMINZADEH GOHARI ,  QUALCOMM Incorporated

Inventor： Liangming WU ,  Yu ZHANG ,  Chao WEI ,  Chenxi HAO ,  Joseph Binamira SORIAGA ,  Amir AMINZADEH GOHARI

IPC: H04W72/04 ,  H04L1/00 ,  H04B7/06 ,  H04L5/00

Abstract: Certain aspects of the present disclosure relate to methods and apparatus relating to multiplexing UCI with data in a physical uplink shared channel (PUSCH) transmission.

公开(公告)号：US20210152305A1

公开(公告)日：2021-05-20

申请号：US16963453

申请日：2019-02-06

Applicant: QUALCOMM Incorporated

Inventor： Chao WEI ,  Qiaoyu LI ,  Peng CHENG

IPC: H04L5/00 ,  H04W52/32

Abstract: Aspects of the present disclosure provide techniques for grouping demodulation reference signal (DMRS) sequences for uplink transmission without grant based on one or more of cross correlation of sequences, the cubic metric or peak-to-average power ratio (PAPR). In accordance with this technique, the power control for transmissions of DMRS can also be exploited to enhance sequence grouping. Features of the present disclosure may prepare a composite sequence that is generated by concatenating two base sequences. In this instance, the base station may provide UEs with a pool of base sequences. For transmission of DMRS, the UEs may select two base sequences that may be transmitted in two consecutive slots or two DMRS symbols in a slot. By allowing the UE to select two base sequences, the network may reduce the probability of a collision that may occur when two UEs select the same base sequence.

公开(公告)号：US20210135823A1

公开(公告)日：2021-05-06

申请号：US16473917

申请日：2018-01-08

Applicant: QUALCOMM Incorporated

Inventor： Yu ZHANG ,  Chao WEI ,  Wanshi CHEN ,  Pavan Kumar VITTHALADEVUNI

IPC: H04L5/00 ,  H04B7/06

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for transmitting multiplexed sounding reference signal (SRS) ports in communications systems operating according to new radio (NR) technologies. An exemplary method includes obtaining an indication of a technique to use in transmitting sounding reference signals (SRS) via five or more antenna ports in one slot and transmitting the SRS via the five or more antenna ports according to the indicated technique.

公开(公告)号：US20200169370A1

公开(公告)日：2020-05-28

申请号：US16630110

申请日：2018-06-25

Applicant: QUALCOMM Incorporated

Inventor： Peng CHENG ,  Wanshi CHEN ,  Hao XU ,  Umesh PHUYAL ,  Alberto RICO ALVARINO ,  Chao WEI

IPC: H04L5/00 ,  H04W72/04

Abstract: In an example, a method of wireless communication of a base station may include assigning, by the base station, one or more resources to a group comprising a plurality of UEs that includes a first UE. The method may include receiving, by the base station from the first UE, a message on the one or more assigned resources. The message may include a cyclic redundancy check (CRC) scrambled with a group identifier for the group comprising the plurality of UEs. The message may include an indication of a UE identifier for the first UE within the group. The message may include a DMRS, where the indication of the UE identifier is represented by a sequence of the DMRS.

公开(公告)号：US20200154486A1

公开(公告)日：2020-05-14

申请号：US16630180

申请日：2018-08-21

Applicant: QUALCOMM Incorporated

Inventor： Peng CHENG ,  Chao WEI

IPC: H04W74/08 ,  H04L5/00 ,  H04L25/03 ,  H04L27/26

Abstract: NPRACH suffers from false alarms in which a base station detects and cannot distinguish an NPRACH signal that is intended for a different base station. An NPRACH may include a cell specific frequency shift pattern over repetitions and/or a repetition level scrambling sequence that enables a base station to more accurately detect NPRACH. An apparatus generates an NPRACH signal comprising multiple repetitions, wherein each repetition comprises multiple symbol groups. The apparatus may apply a different frequency shift between repetitions of the NPRACH signal. The frequency shift may comprise a cell specific random frequency shift pattern applied over each repetition. The apparatus may apply a repetition level scrambling sequence to the NPRACH signal, wherein a single scrambling sequence is applied to a set of repetitions comprised in the NPRACH signal. The apparatus transmits the NPRACH to a serving cell.

公开(公告)号：US20200092749A1

公开(公告)日：2020-03-19

申请号：US16467882

申请日：2017-12-15

Applicant: QUALCOMM Incorporated

Inventor： Liangming WU ,  Chao WEI ,  Yu ZHANG

IPC: H04W28/06 ,  H04W72/04 ,  H04B7/06

Abstract: Methods and apparatus for implementing enhancements to advanced Channel State Information (CSI) reporting procedures are provided. A User Equipment (UE) receives at least one trigger message for reporting advanced CSI by the UE, and takes one or more actions to reduce at least one of feedback overhead or processing at the UE associated with the reporting.

公开(公告)号：US20200044704A1

公开(公告)日：2020-02-06

申请号：US16599018

申请日：2019-10-10

Applicant: QUALCOMM Incorporated

Inventor： Yu Zhang ,  Chao WEI ,  Peng CHENG ,  Neng WANG ,  Jilei HOU

IPC: H04B7/0456 ,  H04L1/00 ,  H04W16/10 ,  H04B7/0426 ,  H04L1/06 ,  H04L1/18 ,  H04B7/06 ,  H04B7/0452 ,  H04W16/28

Abstract: Certain aspects of the present disclosure provide methods and apparatus for linear precoding in full-dimensional MIMO (FD-MIMO) systems. According to aspects, an eNB may compress a larger number of antenna elements to a smaller number of antenna ports. The eNB may use a port precoding matrix to transmit reference signals to a UE, receive feedback regarding CSI based on the reference signals, and transmit data to the UE, based on a mapping of multiple data layers and mapping of antenna ports to the physical antenna elements. Further, aspects include performing elevation beamforming by dynamically forming one or more vertical sectors based on UE feedback in the elevation domain.

公开(公告)号：US20200007375A1

公开(公告)日：2020-01-02

申请号：US16467872

申请日：2018-01-06

Applicant: Yu ZHANG ,  Chao WEI ,  Hao XU ,  Wanshi CHEN ,  Wei ZENG ,  QUALCOMM Incorporated

Inventor： Yu ZHANG ,  Chao WEI ,  Hao XU ,  Wanshi CHEN ,  Wei ZENG

IPC: H04L27/26 ,  H04L25/02 ,  H04L5/00

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for transmitting sounding reference signals (SRS) in communications systems operating according to new radio (NR) technologies. An exemplary method that a user equipment (UE) may perform includes determining whether to transmit a sounding reference signal (SRS) using a discrete Fourier transform (DFT) spread orthogonal frequency domain multiplexing (DFT-S-OFDM) waveform or a cyclic prefix orthogonal frequency domain multiplexing (CP-OFDM) waveform, and transmitting the SRS using the determined waveform.

公开(公告)号：US20190280829A1

公开(公告)日：2019-09-12

申请号：US16345621

申请日：2017-01-06

Applicant: QUALCOMM Incorporated

Inventor： Chao WEI ,  Jing JIANG ,  Changlong XU ,  Jilei HOU

IPC: H04L1/18 ,  H03M13/29 ,  H03M13/13

Abstract: The present disclosure describes various examples of a method, an apparatus, and a computer-readable medium for wireless communications (e.g., 5G NR) using hybrid automatic repeat request (HARQ). For example, one of the methods includes generating a first codeword based on a first code block length, transmitting a first signal using the first codeword, generating a second codeword with incremental redundancy information based on a second code block length, generating a third codeword with repetition of at least a portion of the first codeword based on a third code block length, and transmitting a second signal using at least the second codeword or the third codeword.