NUMBER OF NON-ZERO COEFFICIENTS REPORTING FOR TYPE II CSI CODEBOOK WITH FREQUENCY COMPRESSION

    公开(公告)号:US20220109480A1

    公开(公告)日:2022-04-07

    申请号:US17310748

    申请日:2020-02-22

    IPC分类号: H04B7/06 H04B7/0417

    摘要: Certain aspects of the present disclosure provide techniques for channel state information (CSI) reporting with frequency compression. A method that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration configures the UE for reporting precoding matrix information including, for each layer, a plurality of selected beams L, a plurality of frequency domain compression bases F for the L beams, and a subset of linear combination coefficients associated with the frequency domain compression bases and beams. The UE can determine a number of coefficients to report for a higher rank based on a configured maximum number of coefficients to report for a lower rank.

    PRECODER MATRIX QUANTIZATION FOR COMPRESSED CSI FEEDBACK

    公开(公告)号:US20220085855A1

    公开(公告)日:2022-03-17

    申请号:US17425018

    申请日:2020-01-22

    IPC分类号: H04B7/06 H04B7/0417

    摘要: Certain aspects of the present disclosure provide techniques for precoder matrix quantization for compressed channel state information (CSI) feedback. A method for wireless communications by a user equipment (UE) (120a) includes receiving a CSI report configuration for frequency domain compressed precoder matrix feedback. The CSI report configuration configures the UE (120a) to report, for a plurality of selected beams at a plurality of time domain taps, a frequency domain compression basis vector and a plurality of linear combination coefficients associated with the frequency domain compression (805). For each of the beams, the UE (120a) groups the time domain taps into at least first and second groups. The groups each can have zero, one, or more than one time domain taps (810). The UE (120a) quantizes the corresponding linear combination coefficients and/or frequency domain compression basis vectors based on the grouping (815).

    LINK QUALITY FEEDBACK FOR DIVERSITY ENHANCEMENT BASED NON-COHERENT JOINT TRANSMISSION

    公开(公告)号:US20210306102A1

    公开(公告)日:2021-09-30

    申请号:US17268867

    申请日:2019-08-05

    IPC分类号: H04L1/16 H04L1/18 H04L1/06

    摘要: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a first decoding result for a plurality of downlink control channels of a diversity enhancement based non-coherent joint transmission communication and a second decoding result for a plurality of data channels corresponding to the plurality of downlink control channels; and selectively provide feedback regarding the first decoding result and feedback regarding the second decoding result, the feedback regarding the first decoding result indicating whether reception of one or more downlink control channels, of the plurality of downlink control channels, is successful, and the feedback regarding the second decoding result indicating whether decoding of a codeword of the plurality of data channels is successful. Numerous other aspects are provided.

    UPLINK TRANSMISSION (UL TX) PREPARATION TIME

    公开(公告)号:US20220338212A1

    公开(公告)日:2022-10-20

    申请号:US17753996

    申请日:2019-10-26

    IPC分类号: H04W72/12 H04L5/00

    摘要: Certain aspects of the present disclosure provide techniques for uplink scheduling for communication on an uplink from a user equipment (UE) to a base station (BS). The uplink scheduling is based on uplink transmission (UL Tx) switching time and/or uplink data preparation time of the UE. The uplink data preparation time is calculated based on the UL Tx switching time. For example, a UE can report to a BS at least one of an indication of a UL Tx switching time and an uplink data preparation time of the UE. In return, the UE can receive an indication of uplink scheduling from the BS, which the UE can use to communicate with the BS.

    CQI REPORTING WITH PMI FREQUENCY DOMAIN UNITS

    公开(公告)号:US20220014249A1

    公开(公告)日:2022-01-13

    申请号:US17424819

    申请日:2020-01-23

    发明人: Chenxi HAO Yu ZHANG

    IPC分类号: H04B7/06 H04B7/0417

    摘要: Certain aspects of the present disclosure provide techniques for channel quality indictor (CQI) reporting with precoding matrix indicator (PMI) frequency domain (FD) units. A user equipment (UE) may configured with a CSI reporting configuration. CQI and PMI may be configured with different FD unit sizes. The UE may determine which PMI FD units to use for calculating corresponding CQI FD units. PMI and CQI FD units may not be aligned. The UE may determine which PMI FD units to use for calculating CQI based on the alignment. PMI and CQI FD units may be configured using a separate bitmaps, a bitmap and ratio of the FD unit sizes, or a single bitmap. PMI and/or CQI FD units may start from a lowest FD unit index in the system bandwidth, or the lowest FD unit index within a configured bandwidth part (BWP).