公开(公告)号：US12255841B2

公开(公告)日：2025-03-18

申请号：US17767378

申请日：2019-11-01

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Liangming Wu ,  Qiaoyu Li ,  Chao Wei ,  Hao Xu ,  Peter Gaal ,  Wanshi Chen

IPC: H04L5/00

Abstract: Certain aspects of the present disclosure provide techniques for using subband precoding for uplink transmissions. In some cases, a UE may transmit sounding reference signals (SRS) to a network entity, receive information indicating at least one of a set of one or more frequency domain (FD) bases and linear combination coefficients, determined based on the SRS transmission, determine subband precoding based at least in part on linear combinations of the FD bases based on the linear combination coefficients, and transmit a physical uplink shared channel (PUSCH) with the subband precoding.

公开(公告)号：US12250675B2

公开(公告)日：2025-03-11

申请号：US17768539

申请日：2019-11-01

Applicant: Qualcomm Incorporated ,  Chenxi Hao ,  Yiqing Cao ,  Bo Chen ,  Peter Gaal ,  Hao Xu

Inventor： Chenxi Hao ,  Yiqing Cao ,  Bo Chen ,  Peter Gaal ,  Hao Xu

IPC: H04W72/12 ,  H04W72/1268

Abstract: Methods, systems, and devices for wireless communications are described. In some cases, a user equipment (UE) may In support multiple component carriers that may be used to transmit uplink transmissions. One carrier may be used at a time such that the may switch between the carriers based on an uplink transmission schedule. In some cases, switching may be limited by a consecutive uplink switching rule or UE capability. In some cases, the gap between two consecutive uplink carrier switching operations may be limited to a resource (e.g., slot, symbol), such that the UE may expect to perform at most one switching operation per resource. In some implementations, the gap between two consecutive uplink carrier switching operations may be limited to a duration (e. g., 14 symbols, 4 symbols), such that the UE may expect to perform at most one switching operation per a duration less than or equal to a threshold.

公开(公告)号：US20250007586A1

公开(公告)日：2025-01-02

申请号：US18709470

申请日：2022-01-27

Applicant: QUALCOMM INCORPORATED

Inventor： Wei Xi ,  Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Min Huang ,  Jing Dai ,  Chao Wei ,  Rui Hu ,  Hao Xu

IPC: H04B7/06 ,  H04B7/01

Abstract: Methods, systems, and devices for wireless communication are described to support reducing a time domain selectivity of a downlink channel with multiple signal paths. A base station may spatially precode multiple channel state information reference signals (CSI-RSs) and transmit the spatially precoded CSI-RSs to a user equipment (UE), where at least one spatially precoded CSI-RS may correspond to each signal path. Based on the spatially precoded CSI-RSs, the UE may determine a mean or average Doppler shift for each signal path. The UE may transmit, to the base station, signaling indicative of the respective average Doppler shifts for each signal path. Based on the indication of the Doppler shifts, the base station may spatially and temporally precode one or more downlink transmissions to the UE, which may reduce the time domain selectivity of the downlink channel.

公开(公告)号：US12136973B2

公开(公告)日：2024-11-05

申请号：US18246025

申请日：2020-11-25

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Kangqi Liu ,  Min Huang ,  Rui Hu ,  Hao Xu ,  Wei Xi

IPC: H04B7/0456 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a channel state information (CSI) configuration indicating a first feedback reporting periodicity for a dominant, or strong, spatial layer and a second feedback reporting periodicity for a non-dominant, or weak, spatial layer. The UE may transmit a first CSI report for at least the dominant spatial layer according to the first feedback reporting periodicity. The UE may transmit a second CSI report for the non-dominant spatial layer according to the second feedback reporting periodicity. In some cases, for aperiodic reporting, the UE may be triggered by downlink control information to report CSI for the dominant spatial layer. In some cases, the CSI configuration may indicate different codebooks for the dominant and non-dominant spatial layers.

公开(公告)号：US12088385B2

公开(公告)日：2024-09-10

申请号：US17311773

申请日：2019-12-19

Applicant: QUALCOMM Incorporated

Inventor： Qiaoyu Li ,  Liangming Wu ,  Chenxi Hao ,  Joseph Binamira Soriaga ,  Hao Xu

IPC: H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0658 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0695

Abstract: Configurations and feedback schemes for compressed channel state information (CSI) feedback are provided. A User Equipment (UE) determines a constraint on a total number of transfer domain coefficients to be reported for compressed Channel State Information (CSI) feedback by the UE for a plurality of beams identified for the feedback, wherein each transfer domain coefficient is associated with amplitude information and phase information. The UE selects from a transfer domain coefficient compression matrix, based on the constraint, a set of one or more transfer domain coefficients to report for each of the beams. The UE reports information indicating a number of selected transfer domain coefficients in the set of transfer domain coefficients for each beam and a location of each transfer domain coefficient within the transfer domain coefficient compression matrix and reports at least the amplitude and phase information for the selected coefficients.

公开(公告)号：US11962528B2

公开(公告)日：2024-04-16

申请号：US17274407

申请日：2019-08-23

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Liangming Wu ,  Qiaoyu Li ,  Wanshi Chen ,  Peter Gaal

IPC: H04B7/06 ,  H04L5/00

CPC classification number: H04L5/0048 ,  H04B7/0626 ,  H04B7/0634 ,  H04L5/0057

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.

公开(公告)号：US20230284320A1

公开(公告)日：2023-09-07

申请号：US18041149

申请日：2020-10-16

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Peter Gaal ,  Wanshi Chen ,  Chenxi Hao ,  Xipeng Zhu ,  Yuchul Kim ,  Krishna Kiran Mukkavilli ,  Ozcan Ozturk ,  Jing Lei ,  Hwan Joon Kwon ,  Tingfang Ji

IPC: H04W76/20 ,  H04W24/08 ,  H04W68/02 ,  H04L27/26 ,  H04W76/30

CPC classification number: H04W76/20 ,  H04W24/08 ,  H04W68/02 ,  H04L27/26025 ,  H04W76/30

Abstract: This disclosure provides systems, methods, and devices for wireless communication that support use of a connected mode RS in an unconnected mode according to one or more aspects. In a first aspect, a method of wireless communication includes operating, by a user equipment (UE), in an unconnected mode. The method also includes determining, by the UE, reference signal (RS) configuration settings for the unconnected mode. The method includes monitoring, by the UE, for a reference signal based on the RS configuration settings. The method further includes receiving, by the UE, a RS transmission in the unconnected mode based on the RS configuration settings. Other aspects and features are also claimed and described.

公开(公告)号：US20230261722A1

公开(公告)日：2023-08-17

申请号：US18003099

申请日：2020-08-19

Applicant: QUALCOMM INCORPORATED

Inventor： Wei Xi ,  Yu Zhang ,  Hao Xu ,  Min Huang ,  Chao Wei ,  Changlong Xu ,  Liangming Wu ,  Chenxi Hao ,  Qiaoyu Li ,  Kangqi Liu ,  Jing Dai ,  Rui Hu ,  Jian Li

IPC: H04B7/06 ,  H04B7/08 ,  H01Q3/26

CPC classification number: H04B7/06956 ,  H04B7/086 ,  H01Q3/26

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a device may select antenna elements from a planar array to transmit or receive an orbital angular momentum (OAM) beam. The device may determine a first area (e.g., a first ring area) based on an angular direction over which the device can communicate an OAM beam with a second device and may determine a second area (e.g., a second ring area) on the planar array based on projecting the first area on the planar array. The device may select a set of antenna elements from the planar array that are located within the second area. The device may determine a complex-valued weight for each antenna element of the selected set of antenna elements and may transmit or receive an OAM beam to or from the second device via the set of antenna elements according to the angular direction.

公开(公告)号：US20230131745A1

公开(公告)日：2023-04-27

申请号：US18057617

申请日：2022-11-21

Applicant: QUALCOMM Incorporated

Inventor： Min Huang ,  Chao Wei ,  Chenxi Hao ,  Liangming Wu ,  Qiaoyu Li

IPC: H04B7/0456 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described that provide for channel state information (CSI) feedback for multiple discrete Fourier transform (DFT) beams on multiple transmission layers. A user equipment (UE) may report a total number of non-zero power DFT beams across all of the transmission layers. The UE may be configured with a total number of leading beams (Ktotal) across all of the transmission layers for which to provide high quantization feedback. When the total number of non-zero DFT beams across all the transmission layers exceeds the configured total number of leading beams across all the transmission layers, the UE may report high-resolution quantization feedback for Ktotal non-zero power precoding coefficients having the highest amplitude coefficients, and may report low-resolution quantization feedback for the remaining non-zero power precoding coefficients. A base station may receive the CSI feedback to determine a precoding matrix.

公开(公告)号：US11632160B2

公开(公告)日：2023-04-18

申请号：US16982983

申请日：2019-04-03

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Qiaoyu Li ,  Hao Xu ,  Wanshi Chen

IPC: H04B7/06 ,  H04B7/0456 ,  H04W28/06

Abstract: Certain aspects of the present disclosure provide techniques for reducing overhead for channel state information (CSI). Certain aspects provide a method for wireless communication. The method generally includes receiving a channel state information reference signal (CSI-RS), determining one or more feedback components associated with a CSI feedback type based on the CSI-RS, identifying that a payload of the one or more feedback components is to be compressed, compressing the payload, and reporting the compressed payload.