公开(公告)号：US10826577B2

公开(公告)日：2020-11-03

申请号：US15531131

申请日：2015-01-19

申请人： QUALCOMM Incorporated ,  Chao Wei ,  Wanshi Chen ,  Peter Gaal ,  Yu Zhang

发明人： Chao Wei ,  Wanshi Chen ,  Peter Gaal ,  Yu Zhang

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

摘要： 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：US20210152303A1

公开(公告)日：2021-05-20

申请号：US16623009

申请日：2018-06-13

申请人： Chenxi HAO ,  Yu ZHANG ,  Wanshi CHEN ,  Chao WEI ,  Qualcomm Incorporated

发明人： Chenxi Hao ,  Yu Zhang ,  Wanshi Chen ,  Cha Wei ,  Liangming Wu

IPC分类号： H04L5/00 ,  H04B7/0456 ,  H04B7/06 ,  H04W24/10

摘要： Methods, systems, devices, and apparatus for wireless communication are described that relate to transmission of a set of precoded reference signals, and using a physical resource group (PRG) size for the resources carrying the set of reference signals for channel estimation at a user equipment (UE). For example, a base station may apply a precoding matrix to a set of reference signals, and the reference signals may be configured on a set of resources. In such cases, the resources including these reference signals having a same precoding may be included in a PRG, and a size of the PRG may refer to a number of precoded reference signals for which the precoding is the same. Based on the received reference signals and the PRG size the UE may perform channel estimation based on the PRG size and transmit channel state information (CSI) to the base station.

公开(公告)号：US11177862B2

公开(公告)日：2021-11-16

申请号：US16088285

申请日：2017-05-10

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

发明人： Chao Wei ,  Yu Zhang ,  Bo Chen ,  Jilei Hou

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

摘要： 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：US20210367724A1

公开(公告)日：2021-11-25

申请号：US16641639

申请日：2017-09-07

申请人： 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 ,  Quaicomm Incorporated

发明人： 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分类号： H04L5/00 ,  H04B7/0413

摘要： 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：US11245451B2

公开(公告)日：2022-02-08

申请号：US16642197

申请日：2018-09-08

申请人： Chenxi Hao ,  Yu Zhang ,  Chao Wei ,  Wanshi Chen ,  Hao Xu

发明人： Chenxi Hao ,  Yu Zhang ,  Chao Wei ,  Wanshi Chen ,  Hao Xu

IPC分类号： H04B7/06 ,  H04B17/336 ,  H04W76/27 ,  H04L1/16 ,  H04L5/00 ,  H04W24/10 ,  H04W72/04 ,  H04W80/08

摘要： Certain aspects of the present disclosure relate to communication systems, and more particularly, to a partial channel state information reference signal (CSI-RS) port indication. A method by a base station (BS) includes configuring a user equipment (UE) with a CSI-RS resource, of one or more CSI-RS resources associated with a CSI report. The CSI-RS includes a set of CSI-RS ports. The BS provides a first indication to the UE of a subset of groups of the CSI-RS ports to be used by the UE for channel measurements and/or a second indication to the UE of a subset of groups of the CSI-RS to be used by the UE for interference measurements. Based on the indication, the UE performs channel measurements and/or interference measurements using the indicated subset of CSI-RS ports.

公开(公告)号：US11791878B2

公开(公告)日：2023-10-17

申请号：US16625591

申请日：2018-06-20

申请人： Juan Montojo ,  Alexei Yurievitch Gorokhov ,  Peter Gaal ,  Yu Zhang ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Hari Sankar ,  Alexandros Manolakos ,  Qualcomm Incorporated

发明人： Juan Montojo ,  Alexei Yurievitch Gorokhov ,  Peter Gaal ,  Yu Zhang ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Hari Sankar ,  Alexandros Manolakos

IPC分类号： H04B7/0413 ,  H04B7/06

CPC分类号： H04B7/0626 ,  H04B7/0413 ,  H04B7/0632 ,  H04B7/0639

摘要： Techniques are discussed herein identify transmission strategies and to communicate those identified transmission strategies in a transparent communication environment. In some examples, a user equipment (UE) may identify a new transmission strategy for a downlink channel different from a current transmission strategy for the down link channel. The UE may transmit a channel state information (CSI) message that includes an indication of the new transmission strategy identified by the UE. In some examples, a base station may identify the new transmission strategy for the downlink channel. The base station may transmit a codebook subset restriction (CSR) indicator that includes an indication of the new transmission strategy identified by the base station. In some examples, the UE may modify its feedback strategy based on the new transmission strategy.

公开(公告)号：US20230216627A1

公开(公告)日：2023-07-06

申请号：US17996755

申请日：2020-06-28

申请人： Runxin WANG ,  Muhammad Sayed Khairy ABDELGHAFFAR ,  Yu ZHANG ,  Krishna Kiran MUKKAVILLI ,  Hwan Joon KWON ,  QUALCOMM Incorporated

发明人： Runxin Wang ,  Muhammad Sayed Khairy Abdelghaffar ,  Yu Zhang ,  Krishna Kiran Mukkavilli ,  Hwan Joon Kwon

IPC分类号： H04L5/00 ,  H04W24/10

CPC分类号： H04L5/0035 ,  H04L5/0048 ,  H04L5/0091 ,  H04W24/10

摘要： Aspects of the disclosure relate to radio access networks with a capability to dynamically reconfigure a number of transmission-reception points (TRPs) in a single-frequency network (SFN) based on channel measurements. In one example, a mobile device receives a configuration message including a plurality of transmission configuration indicator (TCI) states, and potentially further including an indication identifying one or more of the TCI states as main TCI states. The message may further include an indication that it includes the plurality of TCI states. The UE receives a downlink traffic channel and demodulates the traffic channel based on only a subset of the TCI states (e.g., the main TCI state (s)). The UE further measures one or more channel parameters corresponding to each TCI state of the plurality of TCI states, and transmits a channel state information report based on the channel parameters. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20190379437A1

公开(公告)日：2019-12-12

申请号：US16476408

申请日：2018-02-05

申请人： Se Yong PARK ,  Wei ZENG ,  Alexandros MANOLAKOS ,  Sony AKKARAKARAN ,  Yi HUANG ,  Renqiu WANG ,  Hao XU ,  Yu ZHANG ,  Joseph Binamira SORIAGA ,  Tingfang JI ,  Peter GAAL ,  Qualcomm Incorporated

发明人： Se Yong Park ,  Wei Zeng ,  Alexandros Manolakos ,  Sony Akkarakaran ,  Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Yu Zhang ,  Joseph Binamira Soriago ,  Tingfang Ji ,  Peter Gaal

IPC分类号： H04B7/0456 ,  H04L27/26 ,  H04L5/00

摘要： Methods, systems, and devices for wireless communication are described that support a low peak-to-average power ratio (PAPR) precoded reference signal design for multiple-input, multiple-output (MIMO) transmissions. A user equipment (UE) may identify multiple sets of symbols associated with different reference signal waveforms, where each reference signal waveform may be associated with a low PAPR. In some cases, different single-carrier reference signal waveforms may be mapped to subsets of frequency resources through frequency division multiplexing (FDM) for a transmission on a single antenna. However, the addition of single-carrier waveforms through FDM for a transmission via an antenna may result in an uplink transmission having a high PAPR (e.g., as compared to single-carrier waveforms). The UE may reduce the PAPR of the uplink transmission by multiplexing the reference signal waveforms in the time domain (e.g., using time division multiplexing (TDM)).

公开(公告)号：US11329849B2

公开(公告)日：2022-05-10

申请号：US16619038

申请日：2018-05-28

申请人： QUALCOMM Incorporated ,  June Namgoong ,  Pavan Kumar Vitthaladevuni ,  Yu Zhang ,  Joseph Binamira Soriaga ,  Jing Jiang ,  Alexandros Manolakos

发明人： June Namgoong ,  Pavan Kumar Vitthaladevuni ,  Yu Zhang ,  Joseph Binamira Soriaga ,  Jing Jiang ,  Alexandros Manolakos

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

摘要： 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：US11044712B2

公开(公告)日：2021-06-22

申请号：US16341836

申请日：2017-11-10

申请人： QUALCOMM Incorporated ,  Jay Kumar Sundararajan ,  Alexandros Manolakos ,  Wanshi Chen ,  Yu Zhang ,  Haitong Sun

发明人： Jay Kumar Sundararajan ,  Alexandros Manolakos ,  Wanshi Chen ,  Yu Zhang ,  Haitong Sun

IPC分类号： H04L5/00 ,  H04W72/04 ,  H04W24/10 ,  H04W72/10

摘要： Certain aspects of the present disclosure provide techniques for indicating a purpose for a reference signal. According to certain aspects, a method of wireless communication by a user equipment (UE) is provided. The method generally includes receiving an indication of a purpose of a reference signal (RS) from a base station (BS) and processing the RS in accordance with the indicated purpose.