公开(公告)号：US20210083735A1

公开(公告)日：2021-03-18

申请号：US16610890

申请日：2018-05-08

Applicant: QUALCOMM Incorporated

Inventor： Jay Kumar SUNDARARAJAN ,  Alexandras MANOLAKOS ,  Yu ZHANG

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

Abstract: Aspects of the present disclosure disclose various methods for grouping network resources into precoder resource groups (PRGs) for precoding in MIMO communication. A user equipment (UE) may select a common precoder that may not be restricted to a codebook for precoding the resources in the same PRG. These resource grouping methods provide the UE with the flexibility to select a precoder that is well suited to the channel or bandwidth. Moreover, the base station may reduce downlink signaling because it does not need to signal the precoder choice to the UE. In some examples, the base station may receive PRG based channel state information feedback that facilitates DL precoding. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20200351125A1

公开(公告)日：2020-11-05

申请号：US16619038

申请日：2018-05-28

Applicant: QUALCOMM Incorporated

Inventor： June NAMGOONG ,  Pavan Kumar VITTHALADEVUNI ,  Yu ZHANG ,  Joseph Binamira SORIAGA ,  Jing JIANG ,  Alexandros MANOLAKOS

IPC: H04L25/02 ,  H04L5/00 ,  H04W72/04 ,  H04B7/0417 ,  H04B7/06

Abstract: Aspects of the present disclosure disclose techniques for the indication of the allocation of the downlink (DL) demodulation reference signal (DM-RS) ports for the data channel in NR communications. In some examples, the channel state information (CSI) reference signal (CSI-RS) may be associated with a corresponding DM-RS for a DL data channel. The transmitting device, in some examples, may further transmit a notification that provides resource allocations (e.g., port allocations) that minimize the redundant information that is required to be transmitted from the base station to the user equipment (UE) when the DM-RS port allocation is the same as the CSI-RS port allocation received by the UE in an earlier time slot.

公开(公告)号：US20200296742A1

公开(公告)日：2020-09-17

申请号：US16768102

申请日：2018-11-28

Applicant: Chenxi HAO ,  Yu ZHANG ,  Yi HUANG ,  Liangming WU ,  Wanshi CHEN ,  Alexandros MANOLAKOS ,  QUALCOMM Incorporated

Inventor： Chenxi HAO ,  Yu ZHANG ,  Yi HUANG ,  Liangming WU ,  Wanshi CHEN ,  Alexandros MANOLAKOS

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/06 ,  H04L1/00 ,  H04W76/27 ,  H04W80/02 ,  H04L5/10 ,  H04L5/00 ,  H04L25/02 ,  H04B7/06

Abstract: Certain aspects of the present disclosure relate to methods and apparatus relating to UCI layer mapping. According to certain aspects, a mapping rule maps UCI to one or more layers of a physical uplink shared channel (PUSCH) transmission based on at least one of a rank of the PUSCH transmission or a modulation and coding scheme (MCS) of the PUSCH transmission.

公开(公告)号：US20200153552A1

公开(公告)日：2020-05-14

申请号：US16614592

申请日：2018-04-20

Applicant: Qualcomm Incorporated

Inventor： Yu ZHANG ,  Wanshi CHEN

IPC: H04L1/06 ,  H04L5/00 ,  H04W72/04 ,  H04W76/27 ,  H04W80/02

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a message indicating, for each or multiple partial bands, a set of possible channel state information reference signal (CSI-RS) configurations. The UE may further receive downlink control information (DCI) from a base station, which may indicate a set of downlink resource associated with a first partial band. The UE may select a first CSI-RS configuration from the set of possible CSI-RS configurations for the first partial band based on the DCI, and when the base station transmits CSI-RS, the UE may obtain CSI-RS measurements over the first partial band during the set of downlink resources using the selected first CSI-RS configuration.

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：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：US20180278315A1

公开(公告)日：2018-09-27

申请号：US15928326

申请日：2018-03-22

Applicant: QUALCOMM Incorporated

Inventor： Liangming WU ,  Yu ZHANG

IPC: H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0626 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0632 ,  H04B7/0645

Abstract: Techniques and apparatus for differential channel state information (CSI) reporting for high resolution CSI are provided. One technique includes receiving a CSI reference signal (CSI-RS). First feedback components associated with first CSI feedback for a first CSI feedback stage are determined based on the CSI-RS, and the first feedback components are reported to a base station. Second feedback components associated with at least one second CSI feedback for at least one second CSI feedback stage are determined based in part on the first feedback components, and the second feedback components are reported to the base station. A precoding for multiple input multiple output (MIMO) communications is determined based on the first feedback components and the second feedback components.

公开(公告)号：US20180054797A1

公开(公告)日：2018-02-22

申请号：US15443449

申请日：2017-02-27

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul ISLAM ,  Sundar SUBRAMANIAN ,  Tingfang JI ,  Yu ZHANG ,  Navid ABEDINI ,  Bilal SADIQ ,  Ashwin SAMPATH

IPC: H04W64/00 ,  H04W72/04

CPC classification number: H04W64/006 ,  H04B7/024 ,  H04B7/0617 ,  H04B7/063 ,  H04L5/0035 ,  H04W72/0413 ,  H04W72/042 ,  H04W88/02 ,  H04W88/08

Abstract: Antenna ports on wireless devices may be QCL. QCL antenna ports may be useful in improving channel statistics related to the antenna ports. UEs and base stations may be able to determine candidate QCL ports, transmit information identifying the candidate QCL ports, and receive feedback indicating whether the candidate QCL ports are QCL at the receiving device such as a UE or a base station.

公开(公告)号：US20170353222A1

公开(公告)日：2017-12-07

申请号：US15544370

申请日：2015-01-19

Applicant: QUALCOMM Incorporated

Inventor： Chao WEI ,  Wanshi CHEN ,  Peter GAAL ,  Yu ZHANG

IPC: H04B7/06 ,  H04B7/04 ,  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：US20170331535A1

公开(公告)日：2017-11-16

申请号：US15531131

申请日：2015-01-19

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.