公开(公告)号：US11432176B2

公开(公告)日：2022-08-30

申请号：US16638213

申请日：2018-08-10

Applicant: Qualcomm Incorporated

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

IPC: H04W24/10 ,  H04B7/06 ,  H04L5/00

Abstract: Some wireless communication networks may improve communication reliability and/or throughput using multiple-input, multiple-output (MIMO) schemes. MIMO operation may in turn be supported by the use of channel state information reference signals (CSI-RS), which may allow communicating devices to estimate and leverage multipath channel conditions. However, the signaling used to support such communications may consume significant resources. In accordance with the described techniques, a user equipment (UE) may identify non-zero-power beams based on received CSI-RS. The non-zero-power beams may contribute to the final precoding vector. Rather than transmitting beam coefficients relating to zero-power beams, the UE may instead indicate a presence of these zero-power beams to the base station (e.g., by indicating a number of non-zero-power beams). Such techniques may reduce overhead of the communications or otherwise benefit the system.

公开(公告)号：US11418302B2

公开(公告)日：2022-08-16

申请号：US16608328

申请日：2018-06-08

Applicant: Qualcomm Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Liangming Wu ,  Chao Wei ,  Wanshi Chen

IPC: H04L5/00 ,  H04B7/06 ,  H04L5/14 ,  H04W24/10 ,  H04W72/04 ,  H04W72/14

Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for communicating an uplink grant and a channel state information reference signal (CSI-RS) trigger. A wireless device may identify a pending collision for a slot of a carrier between a CSI-RS and uplink data. The wireless device may determine a communication configuration for the CSI-RS and the uplink data such that no collision occurs. The determined communication configuration for the CSI-RS may include delaying one of the colliding signals, transmitting only one of the colliding signals and suppressing the other, or reconfiguring the slot such that both signals can be transmitted successfully. Additionally, the UE and the base station may determine a CSI reporting configuration based on the determined communication configuration.

公开(公告)号：US11418245B2

公开(公告)日：2022-08-16

申请号：US17275416

申请日：2019-09-26

Applicant: QUALCOMM Incorporated

Inventor： Liangming Wu ,  Yu Zhang ,  Chenxi Hao ,  Qiaoyu Li ,  Wanshi Chen

IPC: H04B7/02 ,  H04B7/06 ,  H04B7/0456

Abstract: Certain aspects of the present disclosure provide techniques for reporting channel state information (CSI) with spatial and time domain compression. A method comprises receiving one or more signals from a second wireless communications device, determining a precoder matrix index (PMI) based on the signals, performing a channel-tap compression of the PMI and transmitting the channel-tap compressed PMI to the second wireless communications device.

公开(公告)号：US11411678B2

公开(公告)日：2022-08-09

申请号：US17271746

申请日：2019-10-03

Applicant: Qualcomm Incorporated

Inventor： Kai Chen ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Hao Xu

IPC: H04L1/00 ,  H03M13/13 ,  H03M13/00 ,  H04L1/18

Abstract: Wireless devices may use polar codes for encoding transmissions and may support combining transmissions to improve decoding reliability (e.g., by achieving chase combining and incremental redundancy (IR) gains). For example, an encoding device may puncture a set of mother code bits using different puncturing patterns to obtain different redundancy versions for a first transmission and a re-transmission. Each puncturing pattern may correspond to an equivalent decoding performance. In some cases, to obtain equivalent puncture sets, the encoding device may perform punctured index manipulation procedures on an initial puncturing pattern. A punctured index manipulation procedure may involve switching a binary state for a binary bit at a same binary bit index for each puncture index in a puncturing pattern. A device may receive the transmissions generated using the equivalent puncture sets and may combine the information for improved decoding reliability.

公开(公告)号：US11356989B2

公开(公告)日：2022-06-07

申请号：US16615534

申请日：2018-06-15

Applicant: QUALCOMM Incorporated

Inventor： Yu Zhang ,  Chao Wei ,  Liangming Wu ,  Wanshi Chen

IPC: H04W72/04 ,  H04L5/00

Abstract: Reporting aperiodic channel state information (A-CSI) via a physical uplink control channel (PUCCH) is disclosed. A UE receives a configuration to report aperiodic channel state information (A-CSI) using physical uplink control channel (PUCCH). The UE can report lightweight A-CSI via short/long PUCCH or may report heavy A-CSI via short/long PUCCH. The UE receives a trigger signal for PUCCH-based A-CSI reporting either by a dedicated downlink grant or by a group common DCI. When triggered via a DCI-based trigger, the PUCCH resource can be either a resource used for HARQ-ACK feedback, e.g., short PUCCH; or a semi-static configured PUCCH resource, e.g., either short PUCCH or long PUCCH. When triggered via a group common DCI-based trigger, the PUCCH resource can be either semi-statically configured, or dynamically indicated.

公开(公告)号：US11171739B2

公开(公告)日：2021-11-09

申请号：US16763304

申请日：2018-10-26

Applicant: Qualcomm Incorporated ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Kai Chen ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

Inventor： Changlong Xu ,  Liangming Wu ,  Jian Li ,  Kai Chen ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

IPC: H04L1/00 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communications are described. An encoder of a wireless device may receive a transport block (TB) for transmission and segment the transport block into a set of multiple, smaller data segments that respectively In correspond to a plurality of code blocks of the TB. The encoder may generate a code block level (CB-level) error detection code (EDC) for a subset of the data segments. The encoder may generate a transport block-level (TB-level) EDC for the TB using the data segments. Each of the code blocks (CBs) may be of the same size and may include one of the data segments. A subset of the CBs may include a data segment from the subset of the data segments and one of the CB-level EDCs. The remaining CBs that are not part of the subset may include a remaining data segments and the TB-level EDC.

公开(公告)号：US20210152303A1

公开(公告)日：2021-05-20

申请号：US16623009

申请日：2018-06-13

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

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

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

Abstract: 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：US20210050865A1

公开(公告)日：2021-02-18

申请号：US16968920

申请日：2019-02-14

Applicant: Jian LI ,  Changlong XU ,  Liangming WU ,  Kai CHEN ,  Hao XU ,  Jing JIANG ,  Joseph Binamira SORIAGA ,  Qualcomm Incorporated

Inventor： Jian Li ,  Changlong Xu ,  Liangming Wu ,  Kai Chen ,  Hao Xu ,  Jing Jiang ,  Joseph Binamira Soriaga

IPC: H03M13/13 ,  H04L1/08 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device, such as a base station or a user equipment (UE), may generate a first set of encoded bits using a polar code. The transmitting device may transmit the first set of encoded bits to a receiving device, but the receiving device may unsuccessfully receive the transmission. The transmitting device may prepare a retransmission by generating a second set of encoded bits. In some cases, the transmitting device may copy information bits from the first transmission to polarized channels when generating the polar code for the retransmission. The transmitting device may copy information bits based on how the information bits were assigned for the first transmission as well as the block length. The transmitting device may copy information bits such that the retransmission is self-decodable.