公开(公告)号：US12206626B2

公开(公告)日：2025-01-21

申请号：US17640861

申请日：2020-09-09

Applicant: Qualcomm Incorporated

Inventor： Bo Chen ,  Hao Xu ,  Peter Gaal

IPC: H04L5/14 ,  H04L5/00 ,  H04W72/23

Abstract: Methods, systems, and devices for wireless communications are described. A communication device, otherwise known as a user equipment (UE) may receive an indication of an uplink transmission timing pattern configuration for transmitting uplink transmissions on a first carrier. The UE may identify to use both the first carrier and a second carrier during a single uplink transmission mode, where the UE may transition between sending the uplink transmissions on the first and second carriers. The UE may also determine, based on the uplink transmission timing pattern configuration, a timing of uplink carrier switching periods for retuning between transmissions on the first carrier and on the second carrier. As a result, the UE may transmit, during the single uplink transmission mode, on both the first carrier and the second carrier in accordance with the uplink transmission timing pattern configuration for the first carrier and the uplink carrier switching periods.

公开(公告)号：US12166547B2

公开(公告)日：2024-12-10

申请号：US16077272

申请日：2017-03-10

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Bo Chen ,  Liangming Wu ,  Jilei Hou

IPC: H04B7/0456 ,  H04B7/06 ,  H04L1/00 ,  H04L5/00

Abstract: Enhanced hybrid channel state information (CSI) reference signal (CSI-RS) for full dimension multiple input, multiple output (FD-MIMO) is discussed in which a base station configures a first CSI-RS resource for non-precoded CSI-RS and a second CSI-RS resource for beamformed CSI-RS. The first and second CSI-RS resources are associated with the same CSI process in a hybrid CSI-RS operation. The UE provides a first CSI report including a first rank and precoding matrix indicator (PMI) based on measurement of the non-precoded CSI-RS. The base station may use this first CSI process. CSI report for the beamforming of the beamformed CSI-RS. The UE further provides a second CSI report including a second rank, second PMI, and CQI based on measurement of the beamformed CSI-RS. Additional aspects may provide for a base station to aggregate multiple two-port CSI-RS resource configurations into a single multiport CSI-RS resource configuration that may be dynamically shared between different UEs.

公开(公告)号：US12088383B2

公开(公告)日：2024-09-10

申请号：US17276765

申请日：2018-10-16

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Bo Chen ,  Ruifeng Ma ,  Pavan Kumar Vitthaladevuni ,  Wanshi Chen ,  Qiaoyu Li ,  Liangming Wu

IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04L25/02

CPC classification number: H04B7/0639 ,  H04B7/0456 ,  H04L5/0051 ,  H04L25/0226

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.

公开(公告)号：US11871259B2

公开(公告)日：2024-01-09

申请号：US17275128

申请日：2019-09-26

Applicant: QUALCOMM Incorporated

Inventor： Bo Chen ,  Pavan Kumar Vitthaladevuni ,  Yu Zhang ,  Ruifeng Ma ,  Joseph Binamira Soriaga ,  Yeliz Tokgoz ,  Tingfang Ji ,  Alexandros Manolakos

IPC: H04W24/10 ,  H04L5/00 ,  H04L25/02

CPC classification number: H04W24/10 ,  H04L5/0057 ,  H04L25/0224

Abstract: Certain aspects of the present disclosure generally relate to methods and apparatus for sounding reference signal (SRS) guided downlink channel state information-reference signal (CSI-RS) scan. One example method for wireless communication generally includes determining whether to perform channel measurement and reporting operations for a user-equipment (UE) using a reciprocity-based scheme or a channel state information-reference signal (CSI-RS) based scheme based on a criteria of a cell, and performing the channel measurement and reporting operations based on the determination.

公开(公告)号：US20230370229A1

公开(公告)日：2023-11-16

申请号：US18044729

申请日：2020-10-29

Applicant: QUALCOMM INCORPORATED

Inventor： Kexin Xiao ,  Muhammad Sayed Khairy Abdelghaffar ,  Yu Zhang ,  Bo Chen ,  Runxin Wang ,  Yeliz Tokgoz ,  Krishna Kiran Mukkavilli

IPC: H04L5/00 ,  H04W8/22

CPC classification number: H04L5/0051 ,  H04W8/22

Abstract: Methods, systems, and devices for wireless communications are described. A base station may receive a capability message from a user equipment (UE) based on a number of receive antennas exceeding a number of transmit antennas at the UE. The base station may configure the UE with a mapping between sounding reference signal (SRS) resources and bit sequences, or SRS resource indices (SRIs), based on the capability message. The base station may transmit a control message including one or more SRIs indicating respective SRS resources. The UE may use the one or more SRIs included in a control message from the base station to select respective SRS resources from a resource set. Once the UE selects one or more SRS resources, the UE may transmit one or more SRSs in the SRS resources.

公开(公告)号：US11799525B2

公开(公告)日：2023-10-24

申请号：US17250896

申请日：2019-09-26

Applicant: QUALCOMM Incorporated

Inventor： Bo Chen ,  Pavan Kumar Vitthaladevuni ,  Yu Zhang ,  Ruifeng Ma ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/0408

CPC classification number: H04B7/0478 ,  H04B7/0408

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine channel state information for a communication link, wherein the channel state information is based at least in part on a linear combination associated with a plurality of beams of the communication link, wherein a first set of beams used for a first subband, of a plurality of subbands of the communication link, is different than a second set of beams used for a second subband of the plurality of subbands, and wherein the plurality of beams includes the first set of beams and the second set of beams; and transmit the channel state information. Numerous other aspects are provided.

公开(公告)号：US11632208B2

公开(公告)日：2023-04-18

申请号：US16078434

申请日：2017-02-17

Applicant: QUALCOMM Incorporated

Inventor： Bo Chen ,  Chao Wei ,  Liangming Wu ,  Neng Wang

IPC: H04B7/0417 ,  H04L5/00 ,  H04B7/06 ,  H04B7/0413 ,  H04W24/08 ,  H04W24/10

Abstract: Channel covariance feedback is disclosed for enhanced full-dimension multiple input, multiple output (eFD-MIMO) systems. Channel state information (CSI) reference signal (CSI-RS) feedback operations are implemented using spatial covariance feedback of a covariance estimate. After obtaining a set of orthogonal basis vectors, a user equipment (UE) measures the CSI-RS from a base station and determines the spatial covariance matrix from the signal. The UE may then compress the spatial covariance matrix into a lower-dimension covariance estimate matrix using the orthogonal basis vectors. The lower-dimension matrix along with element-wise quantization allows for feedback of spatial covariance for eFD-MIMO systems without excessive feedback overhead.

公开(公告)号：US11177862B2

公开(公告)日：2021-11-16

申请号：US16088285

申请日：2017-05-10

Applicant: QUALCOMM Incorporated ,  Chao Wei ,  Yu Zhang ,  Bo Chen ,  Jilei Hou

Inventor： Chao Wei ,  Yu Zhang ,  Bo Chen ,  Jilei Hou

IPC: H04W4/00 ,  H04B7/0452 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00

Abstract: A hybrid class B channel state information (CSI) reference signal (CSI-RS) scheme is discussed which configures one cell-common beamformed CSI-RS resource for beam tracking and another UE-specific beamformed CSI-RS resource for CSI feedback. The cell-common beamformed CSI-RS resource may be transmitted at a longer periodicity and shared by user equipments (UEs) in the cell. The beamforming may be cycled over a set of predefined weights transparent to UE. The UE-specific beamformed CSI-RS may be transmitted at a shorter periodicity and can be activated dynamically to allow resource sharing among multiple UEs. The UEs will report a CSI for the cell-common beamformed CSI-RS resource which provides a quality indicator for the associated cell-common beam and is utilized by the base station to determine the precoding weight for the UE-specific beamformed CSI-RS resource. Both resources can be configured with different parameter sets, such as number of ports, codebook type, and CSI reporting parameters.

公开(公告)号：US12166618B2

公开(公告)日：2024-12-10

申请号：US18012876

申请日：2020-08-27

Applicant: QUALCOMM Incorporated

Inventor： Bo Chen ,  Chenxi Hao ,  Hao Xu

IPC: H04L27/26 ,  H04L5/00

Abstract: A method of wireless communication by a user equipment (UE) includes receiving, from a base station, a receive chain switching configuration for a multi-carrier environment. The UE also receives a physical downlink control channel (PDCCH) on one or more carriers of the multi-carrier environment with multiple receive chains, in accordance with the receive chain switching configuration. The UE decodes downlink control information (DCI) from the PDCCH for physical downlink shared channel (PDSCH) scheduling across multiple carriers in the multi-carrier environment. The UE performs receive chain switching based on the PDSCH scheduling from the decoded DCI and the receive chain switching configuration.

公开(公告)号：US11984955B2

公开(公告)日：2024-05-14

申请号：US17801505

申请日：2020-04-17

Applicant: QUALCOMM Incorporated

Inventor： Bo Chen ,  Pavan Kumar Vitthaladevuni ,  Taesang Yoo ,  Naga Bhushan ,  Jay Kumar Sundararajan ,  Ruifeng Ma ,  June Namgoong ,  Krishna Kiran Mukkavilli ,  Hao Xu ,  Tingfang Ji

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  H04B7/0695

Abstract: A method of wireless communication, by a user equipment (UE), includes receiving multiple neural network training configurations for channel state feedback (CSF). Each configuration corresponds to a different neural network framework. The method also includes training each of a group of neural network decoder/encoder pairs in accordance with the received training configurations. A method of wireless communication, by a base station, includes transmitting multiple neural network training configurations to a user equipment (UE) for channel state feedback (CSF). Each configuration corresponds to a different neural network framework. The method also includes receiving a neural network decoder/encoder pair trained in accordance with the training configurations.