公开(公告)号：US11637603B2

公开(公告)日：2023-04-25

申请号：US16941287

申请日：2020-07-28

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04W72/04 ,  H04W88/02

Abstract: Mechanisms for reduction of channel state information (CSI) feedback overhead are disclosed for full dimensional multiple input, multiple output (FD-MIMO) systems with large dimension antenna ports. In one aspect, rank-dependent CSI antenna port measurements are used in order to limit the number of antenna ports for high rank CSI reporting. Another aspect allows a user equipment (UE) to select subband feedback for aperiodic CSI porting on an uplink shared channel when the UE is to report subband quality and precoding indicators. Another aspect provides for on-demand CSI feedback that dynamically configures CSI feedback parameters. To reduce the signaling overhead, the multiple parameter sets may be pre-configured with different values for dynamic reporting parameters.

公开(公告)号：US11611378B2

公开(公告)日：2023-03-21

申请号：US17028974

申请日：2020-09-22

Applicant: QUALCOMM Incorporated

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

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/17 ,  H04B7/26

Abstract: Enhanced channel state information (CSI) feedback is disclosed for full dimensional multiple input, multiple output (FD-MIMO) operations. In one aspect, a single CSI process is defined that is configured with an azimuth and elevation CSI-reference signal (RS) ports. A user equipment (UE) will send a precoding matrix indictor (PMI) report including a precoding matrix indicator (PMI) for the azimuth ports and a PMI for the elevation ports. One of the PMIs is assigned a low rank. The base station will use the two PMIs to create a whole channel precoding matrix. In another aspect, a single CSI process is configured having a plurality of CSI-RS resources. The UE generates channel measurement information for each of the CSI-RS resources, but only sets a CSI report to the base station of a subset of the total number of resources.

公开(公告)号：US11558149B2

公开(公告)日：2023-01-17

申请号：US16544788

申请日：2019-08-19

Applicant: QUALCOMM Incorporated

Inventor： Jian Li ,  Changlong Xu ,  Chao Wei ,  Jilei Hou

IPC: H03M13/00 ,  H04L1/00 ,  H03M13/13 ,  H03M13/27 ,  H03M13/29

Abstract: Aspects of the disclosure relate to wireless communication devices configured to encode information blocks to produce code blocks and interleave the code blocks utilizing an interleaver including a plurality of rows and a plurality of columns, where the number of columns of the interleaver varies between the rows. In some examples, the interleaver includes a right isosceles triangle-shaped matrix of rows and columns. In other examples, the interleaver includes a trapezoid-shaped matrix of rows and columns.

公开(公告)号：US20220417997A1

公开(公告)日：2022-12-29

申请号：US17685843

申请日：2022-03-03

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Chao Wei ,  Muhammad Nazmul Islam ,  Linhai He ,  Yongle Wu ,  Chun-Hao Hsu ,  Murali Menon

IPC: H04W74/08 ,  H04L5/16

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques relate to improved methods, systems, devices, and apparatuses that support random-access occasion (RO) selection for reduced-capability (RedCap) user equipment (UEs). A RedCap UE operating in a half-duplex mode may use the techniques described herein to efficiently select an RO in which to transmit a random-access preamble based on a duration between a latest received downlink transmission and the RO satisfying a threshold duration. The UE may receive system information mapping a set of synchronization signal blocks (SSBs) to a set of ROs. The UE may then select an RO from the set of ROs in which to transmit the random-access preamble such that the UE has sufficient time to transition from a receive mode to a transmit mode to transmit the random-access preamble.

公开(公告)号：US11490413B2

公开(公告)日：2022-11-01

申请号：US16633399

申请日：2018-09-07

Applicant: QUALCOMM Incorporated ,  Yu Zhang ,  Hao Xu ,  Chao Wei ,  Peng Cheng ,  Wanshi Chen ,  Peter Gaal ,  Durga Prasad Malladi

Inventor： Yu Zhang ,  Hao Xu ,  Chao Wei ,  Peng Cheng ,  Wanshi Chen ,  Peter Gaal ,  Durga Prasad Malladi

IPC: H04W72/14 ,  H04L5/00 ,  H04W72/04

Abstract: Certain aspects of the present disclosure generally relate to wireless communication. More particularly, certain aspects of the present disclosure relate to early termination of a downlink channel repetition transmission, early termination of an uplink channel repetition, and/or determination of a plurality of beams for a repetition transmission. Numerous other aspects are provided.

公开(公告)号：US11477784B2

公开(公告)日：2022-10-18

申请号：US16756729

申请日：2018-08-30

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Alberto Rico Alvarino ,  Le Liu ,  Wanshi Chen ,  Xiao Feng Wang ,  Hao Xu

IPC: H04L12/28 ,  H04W72/04 ,  H04L5/00 ,  H04J1/16 ,  H04W74/08

Abstract: In some aspects, the SIB1 message is transmitted in a subframe 0 and a subframe 5 of alternating radio frames of the non-anchor carrier. In some aspects, the SIB1 message is transmitted in a subframe 0 of alternating radio frames of the anchor carrier. In some aspects, the frequency domain location parameter is associated with a physical resource block offset relative to a center frequency, and the anchor carrier is in a first frequency range greater than the center frequency by the physical resource block offset and the non-anchor carrier is in a second frequency range less than the center frequency by the physical resource block offset, or the non-anchor carrier is in the first frequency range greater than the center frequency by the physical resource block offset and the anchor carrier is in the second frequency.

公开(公告)号：US11303492B2

公开(公告)日：2022-04-12

申请号：US16326355

申请日：2017-03-24

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Wanshi Chen ,  Peter Gaal

IPC: H04L27/26 ,  H04L1/08 ,  H04L5/00

Abstract: Comb adaptation for interlaced frequency division multiplex (IFDM) demodulation reference signals (DMRS) is discussed. Transmission configuration for DMRS may be assigned to UEs with a coded combination of cyclic shift, OCC, and comb value. Some assigned combinations provide for a different comb value to be used for the different slots in the same subframe. Further aspects provide additional interference randomization through comb shifting, using inter-subframe hopping functions. Additionally, where retransmissions are present without uplink grant, the UE may select comb values for retransmissions based on the counter number for the retransmissions, which are different than the comb values used for the original DMRS transmissions.

公开(公告)号：US11277243B2

公开(公告)日：2022-03-15

申请号：US16467688

申请日：2018-01-06

Applicant: QUALCOMM Incorporated

Inventor： Chenxi Hao ,  Xiaohui Liu ,  Chao Wei ,  Yu Zhang

IPC: H04L5/00 ,  H04B7/06

Abstract: Certain aspects of the present disclosure provide procedures for transparent demodulation reference signal (DM-RS) design. According to certain aspects, a method of wireless communication by a base station (BS) is provided. The method generally includes transmitting one or more pilots based on at least one precoder used for transmitting data. The BS transmits the data based on the at least one precoder. A method by a user equipment (UE) includes receiving one or more pilots based on at least one precoder used for transmitting data on a channel. The UE estimates interference based on the one or more pilots and the UE decodes the data transmission based on the interference estimate.

公开(公告)号：US11258564B2

公开(公告)日：2022-02-22

申请号：US16313806

申请日：2017-05-11

Applicant: Chao Wei ,  Wanshi Chen ,  Peter Gaal ,  QUALCOMM Incorporated

Inventor： Chao Wei ,  Wanshi Chen ,  Peter Gaal

IPC: H04L5/00

Abstract: Signaling design for interlaced frequency divisional multiplex (IFDM) demodulation reference signals (DMRS) is discussed in which a dynamic indication is provided to a user equipment (UE) from a serving base station that allows the UE to configure transmission of DMRS according to either a single carrier frequency divisional multiplex (SC-FDM) or IFDM configurations, as indicated by the dynamic indication. The IFDM configuration may be applicable to either regular uplink subframes or within the uplink portion of special subframes. In some aspects, power boosting may be provided for the DMRS in order to equalize transmit power between decimated DMRS transmitted with the data tones. Additional aspects may also provide for different offsets to be used depending on the type of uplink control signal transmitted.

公开(公告)号：US11139931B2

公开(公告)日：2021-10-05

申请号：US15527291

申请日：2015-08-12

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Peter Gaal ,  Wanshi Chen ,  Hao Xu ,  Jilei Hou ,  Neng Wang

IPC: H04W16/06 ,  H04L5/14 ,  H04W16/14 ,  H04L5/00

Abstract: Methods, systems, and apparatuses are described for flexible transmissions on one or more frequency division duplexing resources. In some aspects, a subset of resources originally allocated for transmissions in a frequency division duplex (FDD) mode of operation associated with a first base station is identified for reallocation, and the identified subset of resources is reallocated to transmissions in a time division duplex (TDD) mode of operation, for example, associated with a second base station.