公开(公告)号：US20220150017A1

公开(公告)日：2022-05-12

申请号：US17583578

申请日：2022-01-25

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04B7/0417

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：US11310705B2

公开(公告)日：2022-04-19

申请号：US16469451

申请日：2018-01-26

Applicant: QUALCOMM Incorporated

Inventor： Huichun Liu ,  Xipeng Zhu ,  Gavin Bernard Horn ,  Ruiming Zheng ,  Yu Zhang ,  Chao Wei ,  Ozcan Ozturk ,  Jae Ho Ryu ,  Jiming Guo ,  Peng Cheng

IPC: H04W36/00 ,  H04W36/08 ,  H04W76/27 ,  H04W72/04

Abstract: An apparatus for wireless communication, including a memory and at least one processor coupled to the memory. The at least one processor is configured to receive a pre-allocation resource for a target cell via a handover command and transmit a physical layer acknowledgment based on a target cell downlink packet. The at least one processor is also configured to receive an indication for a communication with the target cell in response to the physical layer acknowledgement and access the target cell using the pre-allocated resource based on the indication for the communication with the target cell.

公开(公告)号：US11259280B2

公开(公告)日：2022-02-22

申请号：US16336303

申请日：2017-07-11

Applicant: QUALCOMM Incorporated

Inventor： Changlong Xu ,  Jian Li ,  Chao Wei ,  Chong Li ,  Tingfang Ji ,  Jilei Hou

IPC: H04W72/04 ,  H04L1/00

Abstract: Various aspects of the disclosure relate to mapping different information to different sub-channels. For example, information for different users may be mapped to different Polar code sub-channels. In some aspects, the mapping may be unbalanced in that different information is mapped to different sub-channels according to the quality (e.g., in terms of error probability) of the sub-channels and a criterion associated with the information. For example, control information for users that are experiencing the worst channel quality (e.g., in a wireless communication channel) may be mapped to the Polar code sub-channels that have the best quality.

公开(公告)号：US11233530B2

公开(公告)日：2022-01-25

申请号：US16475344

申请日：2017-06-29

Applicant: QUALCOMM Incorporated

Inventor： Gaojin Wu ,  Chao Wei ,  Jing Jiang

IPC: H03M13/25 ,  H04W76/11 ,  H03M13/13 ,  H04W72/04

Abstract: Wireless communication devices are adapted to facilitate information sequences included in frozen sub-channels of polar coded transmissions. According to one example, an apparatus can generate a mask sequence based on a plurality of parameters, including at least one of a transmitting-device-specific sequence or a receiving-device-specific sequence. In some examples, the frozen bits may be masked with the mask sequence, and an information block may be encoded utilizing polar coding. In other examples, the mask sequence may be compared to the frozen bits of a received information block, and the received information block may be determined as intended for the apparatus when the mask sequence matches to the frozen bits. Other aspects, embodiments, and features are also included.

公开(公告)号：US11153870B2

公开(公告)日：2021-10-19

申请号：US16055860

申请日：2018-08-06

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Wanshi Chen ,  Xiaoxia Zhang ,  Neng Wang ,  Hao Xu ,  Peter Gaal

IPC: H04W52/14 ,  H04W72/04 ,  H04L1/18 ,  H04L1/00 ,  H04L5/00 ,  H04W52/04

Abstract: Aspects of the present disclosure relate to techniques that may help enable the determination of uplink resource allocation in systems that support dynamic uplink-downlink subframe configurations. An example method generally includes receiving signaling indicating a dynamic uplink-downlink (UL-DL) subframe configuration, determining hybrid automatic repeat request (HARQ) acknowledgment/negative acknowledgment (ACK/NACK) timing based on a reference UL-DL subframe configuration, and determining HARQ resource allocation based on the dynamic UL-DL subframe configuration.

公开(公告)号：US11128316B2

公开(公告)日：2021-09-21

申请号：US16320038

申请日：2017-06-26

Applicant: QUALCOMM INCORPORATED

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

IPC: H03M13/00 ,  H03M13/13 ,  H04B17/336 ,  H03M13/35 ,  H04L1/00 ,  H04L1/18

Abstract: Methods and apparatus for constructing polar codes are provided. A transmitter determines at least one set of parameters corresponding to data to be transmitted, and a set of sorting indices corresponding to bits of the data to be transmitted based on the set of parameters, the set of sorting indices indicating a position set of the bits to be transmitted. The transmitter polar encodes the data based at least on the set of parameters and the set of sorting indices to generate a coded block of the data, and transmits the coded block of the data.

公开(公告)号：US11108416B2

公开(公告)日：2021-08-31

申请号：US16474474

申请日：2018-02-07

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Jing Jiang ,  Gabi Sarkis ,  Changlong Xu

IPC: H03M13/00 ,  H03M13/13

Abstract: Features of the present disclosure implement a low complexity rate-matching design for polar codes that supports full rate-matching granularity, in some cases without good bit re-estimation after puncturing. In particular, features of the present disclosure provide techniques for adjusting the information bits allocation based on the number of punctured bits (P) for block puncturing polar codes. Particularly, features of the present disclosure determine the number of information bits for each sector based on a capacity formula after the puncturing.

公开(公告)号：US11101904B2

公开(公告)日：2021-08-24

申请号：US16491307

申请日：2017-08-11

Applicant: Qualcomm Incorporated

Inventor： Chenxi Hao ,  Yu Zhang ,  Chao Wei

IPC: H04B17/364 ,  H04B17/24 ,  H04B17/318 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04

Abstract: The described techniques relate to improved methods, systems, devices, or apparatuses that support communication schemes for small cyclic delay diversity (SCDD) reference signals. A base station may transmit a control message comprising at least one channel state information (CSI) configuration parameter to a user equipment (UE). The UE may identify a time offset between a plurality of virtual antennas of the base station based at least in part on the CSI configuration parameter. The UE may perform measurements of a plurality of CSI reference signals (CSI-RSs) transmitted by the base station and associated with the virtual antennas. The UE may transmit a feedback message based at least in part on the determined time offset and the measurements of the CSI-RSs.

公开(公告)号：US11070237B2

公开(公告)日：2021-07-20

申请号：US16487242

申请日：2017-03-23

Applicant: QUALCOMM Incorporated

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

IPC: H03M13/29 ,  H03M13/13 ,  H03M13/09 ,  H04L1/00 ,  H03M13/00 ,  H03M13/15

Abstract: Methods, systems, and devices for wireless communication are described that support channel selection for parity bits in polar coding techniques. In some cases, an encoder or decoder of a wireless device may assign information bits, frozen bits, and parity check bits to polar channels of an encoder or decoder based on reliability metrics. The information bits may initially be assigned and based on a channel index of the first information bit, the parity check bits may be assigned to channels having higher channel indices than the first information bit. After assignment, the bits may be encoded or decoded.

公开(公告)号：US11018745B2

公开(公告)日：2021-05-25

申请号：US16324710

申请日：2017-08-11

Applicant: QUALCOMM INCORPORATED

Inventor： Yu Zhang ,  Chao Wei ,  Jilei Hou

IPC: H04L5/12 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06

Abstract: Certain aspects of the present disclosure provide techniques for channel state information acquisition in wireless communication systems operating according to new radio (NR) technologies. An exemplary method that may be performed by a user equipment (UE) generally includes receiving a first beamformed channel state information reference signal (CSI-RS), determining, based on the first beamformed CSI-RS and the beacon reference signal, information regarding an adjustment, preferred by the UE, of a beam-former to be used for a forthcoming second beamformed CSI-RS, transmitting a beamformer adjustment indicator (BAI), periodically, semi-persistently, or aperiodically, that indicates the preferred adjustment, and reporting channel state information feedback (CSF), based on the first beamformed CSI-RS.