公开(公告)号：US11804883B2

公开(公告)日：2023-10-31

申请号：US17429657

申请日：2020-02-06

Applicant: Qualcomm Incorporated

Inventor： Qiaoyu Li ,  Chao Wei ,  Yu Zhang ,  Liangming Wu ,  Chenxi Hao ,  Min Huang ,  Hao Xu ,  Wanshi Chen ,  Juan Montojo

IPC: H04B7/0456 ,  H04B7/0404 ,  H04B7/0408 ,  H04L5/00 ,  H04W72/20

CPC classification number: H04B7/0456 ,  H04B7/0404 ,  H04B7/0408 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0091 ,  H04W72/20

Abstract: Methods, systems, devices, and apparatuses for wireless communications that support transmission diversity enhancement for uplink control channel are described. Generally, the described techniques provide for enhanced performance of an uplink control channel such as a physical uplink control channel (PUCCH) through the use of transmission diversity. In some cases, multiple input multiple output (MIMO) techniques may be supported for transmission of an uplink control channel for a given format suitable for transmission diversity enhancement. A resource block (RB) used in an uplink control channel transmission may contain a number of resource elements (REs) across one or more resource blocks. According to some aspects, a transmit diversity scheme may be employed at the RE level through application of different spatial precoders for different groups of REs of a given RB.

公开(公告)号：US11792791B2

公开(公告)日：2023-10-17

申请号：US17250450

申请日：2019-07-17

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Alberto Rico Alvarino ,  Le Liu ,  Ayan Sengupta

IPC: H04W72/1273 ,  H04W4/70 ,  H04W72/23

CPC classification number: H04W72/1273 ,  H04W4/70 ,  H04W72/23

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may transmit, and an enhanced machine-type communications (eMTC) user equipment (UE) may receive, an indicator indicating use of a control region of a carrier for a downlink transmission. The BS may transmit and the eMTC UE may receive, based at least in part on the indicator, the downlink transmission during the control region of the carrier. Numerous other aspects are provided.

公开(公告)号：US11784695B2

公开(公告)日：2023-10-10

申请号：US17583578

申请日：2022-01-25

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Yu Zhang ,  Wanshi Chen ,  Peter Gaal

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

CPC classification number: H04B7/0626 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/088 ,  H04L1/0026 ,  H04B7/0639

Abstract: 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：US11777675B2

公开(公告)日：2023-10-03

申请号：US16641639

申请日：2017-09-07

Applicant: Qualcomm Incorporated

Inventor： Yu Zhang ,  Wanshi Chen ,  Chao Wei ,  Peter Gaal ,  Timo Ville Vintola ,  Vishal Mahajan ,  Alexei Yurievitch Gorokhov ,  Amir Aminzadeh Gohari ,  Alexandros Manolakos ,  Joseph Binamira Soriaga ,  Valentin Alexandru Gheorghiu

IPC: H04L5/00 ,  H04B7/0413

CPC classification number: H04L5/0048 ,  H04B7/0413 ,  H04L5/001

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a UE capability message, the UE capability message indicating a supported transmit antenna switching (TxAS) capability for each port of the UE. The UE may receive a configuration message indicating an uplink multiple-input/multiple-output (UL MIMO) configuration for the UE, the UL MIMO configuration being based at least in part on the UE capability message. The UE may identify, based at least in part on the configuration message, a sounding reference signal (SRS) configuration to use for transmitting SRSs in conjunction with the UL MIMO communications, the SRS configuration comprising a configuration for transmission by the UE of SRSs using at least one of the two or more ports of the UE, the SRSs transmitted on one or more antennas of the UE selected according to a TxAS configuration for the respective port.

公开(公告)号：US20230261729A1

公开(公告)日：2023-08-17

申请号：US18003576

申请日：2020-08-21

Applicant: QUALCOMM Incorporated

Inventor： Min Huang ,  Chao Wei ,  Qiaoyu Li ,  Jing Dai ,  Wei Xi ,  Chenxi Hao ,  Kangqi Liu ,  Hao Xu ,  Changlong Xu ,  Wanshi Chen

IPC: H04B7/08 ,  H04B7/06

CPC classification number: H04B7/0888 ,  H04B7/0626 ,  H04B7/0857

Abstract: Aspects of the disclosure relate to transmitting, from a user equipment (UE) to a base station, information indicative of a multicast session that the UE is interested in accessing; transmitting information indicating that a first beam of a plurality of beams is a preferred beam for receiving multicast data associated with the multicast session; receiving, from the base station, a list of at least one beam of the plurality of beams associated with the multicast session; and receiving, from the base station using a beam from the list, multicast data associated with the multicast session. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20230254022A1

公开(公告)日：2023-08-10

申请号：US18003465

申请日：2020-08-17

Applicant: QUALCOMM INCORPORATED

Inventor： Chenxi Hao ,  Yu Zhang ,  Chao Wei ,  Liangming Wu ,  Hao Xu

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  H04B7/0632 ,  H04B7/0639

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a channel state information (CSI) report configuration or a trigger for reporting a CSI report. The UE may receive one or more CSI-reference signal (RS) resources associated with the CSI report. The UE may determine, based on a measurement of one or more CSI-RSs, a channel quality for each slot of a set of slots. The UE may transmit, during an uplink transmission occasion, the CSI report that includes the channel quality for two or more slots of the set of slots. The UE may transmit the CSI report during an uplink transmission occasion.

公开(公告)号：US20230224886A1

公开(公告)日：2023-07-13

申请号：US18001840

申请日：2020-08-07

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Jing Lei ,  Jing Dai

IPC: H04W72/12 ,  H04L1/00 ,  H04L5/16

CPC classification number: H04W72/12 ,  H04L1/0013 ,  H04L5/16

Abstract: A method of wireless communication may include determining a gap configuration for a mobile device, wherein the gap configuration defines a desired gap between a scheduled downlink transmission for reception by a mobile device and an uplink transmission from the mobile device; determining whether a gap between a scheduled downlink transmission for reception by a mobile device and an uplink transmission from the mobile device is less than a defined number of symbols for the desired gap; and/or puncturing at least one of the downlink transmission and the uplink transmission when the gap is determined to be less than the defined number of symbols. The puncturing may be performed on the downlink transmission and/or the uplink transmission when the scheduled gap is less than a desired gap, and optionally the puncturing is performing without puncturing a CSI-RS, a DMRS, or a PTRS. Other aspects and features are also claimed and described.

公开(公告)号：US11690124B2

公开(公告)日：2023-06-27

申请号：US17266902

申请日：2019-08-07

Applicant: QUALCOMM Incorporated

Inventor： Qiaoyu Li ,  Chao Wei ,  Yu Zhang ,  Chenxi Hao ,  Hao Xu

IPC: H04W76/19 ,  H04B7/06 ,  H04L1/16 ,  H04L1/1607

CPC classification number: H04W76/19 ,  H04B7/0626 ,  H04L1/1607

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that a beam failure recovery request (BFRQ) is to be transmitted, wherein the BFRQ is associated with a plurality of repetitions of a communication; and transmit the BFRQ using a particular configuration based at least in part on whether the UE has successfully decoded one or more of the plurality of repetitions of the communication. Numerous other aspects are provided.

公开(公告)号：US11677448B2

公开(公告)日：2023-06-13

申请号：US15549597

申请日：2016-02-09

Applicant: QUALCOMM INCORPORATED

Inventor： Chao Wei ,  Wanshi Chen ,  Peter Gaal ,  Guodong Li ,  Jilei Hou

IPC: H04B7/0452 ,  H04B7/0456 ,  H04L5/00 ,  H04L25/02 ,  H04W72/04 ,  H04W72/12 ,  H04W72/0453

CPC classification number: H04B7/0452 ,  H04B7/0456 ,  H04L5/0007 ,  H04L5/0021 ,  H04L5/0048 ,  H04L25/0242 ,  H04W72/0453 ,  H04W72/1289

Abstract: Certain aspects of the present disclosure support demodulation reference signal (DMRS) enhancement for higher order multi-user multiple-input multiple-output (MU-MIMO) communications. An example method generally includes determining a plurality of ports of a multi-dimensional array of transmit antennas and a number of spatial multiplexed layers for transmission to a plurality of user equipments (UEs), configuring a demodulation reference signal (DMRS) pattern by multiplexing the layers or the ports in the DMRS pattern, using an orthogonal cover code (OCC) and one or more code division multiplexing (CDM) groups, and transmitting DMRS symbols based on the configured DMRS pattern using the multiplexed layers and the ports.

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.