Sounding reference signal based downlink transmission configuration indication

    公开(公告)号:US12107795B2

    公开(公告)日:2024-10-01

    申请号:US17760551

    申请日:2019-09-29

    Applicant: Apple Inc.

    CPC classification number: H04L5/006 H04L5/0094

    Abstract: To reduce the beam reporting latency, a base station may include a sounding reference signal (SRS) indication to a wireless communication device (UE) as part of the transmission configuration information (TCI) transmitted to the UE, allowing the UE to receive a corresponding downlink signal using the same beam (or with the same beam) the UE used to transmit (or with which the UE transmitted) the SRS indicated in the TCI. The SRS may be one of multiple SRSs previously transmitted by the UE. The UE may transmit the multiple SRSs periodically and/or according to semi-persistent scheduling, or it may transmit them aperiodically. Therefore, the UE does not need to report the beam quality, and the base station may perform the necessary beam measurement(s) instead. Various parameters and conditions may be defined for the UE to support SRS-based TCI.

    Scheduling-Power Profile for UE Power Savings
    314.
    发明公开

    公开(公告)号:US20240314688A1

    公开(公告)日:2024-09-19

    申请号:US18679032

    申请日:2024-05-30

    Applicant: Apple Inc.

    CPC classification number: H04W52/0216 H04W72/0446 H04W72/23

    Abstract: Apparatuses, systems, and methods for a wireless device to perform a method including a user equipment device (UE) exchanging communications with a base station to determine one or more scheduling profiles, such as one or more scheduling-power profiles, where a scheduling-power profile may specify one or more parameters associated with UE communication behavior, e.g., one or more constraints on UE communication behavior and/or slot scheduling of UE communications. In addition, the method may include the UE receiving a slot configuration schedule from the base station. The slot configuration schedule may be based on at least one scheduling-power profile of the one or more scheduling-power profiles. Further, the method may include the UE performing communications with the base station based on the at least one scheduling-power profile.

    Systems and methods to receive CSI-RS/TRS indication by idle/inactive mode UEs for improved paging reception

    公开(公告)号:US12096488B2

    公开(公告)日:2024-09-17

    申请号:US17593746

    申请日:2020-07-31

    Applicant: Apple Inc.

    CPC classification number: H04W74/0841 H04L5/0051 H04W68/02

    Abstract: An example method for wireless communication includes: receiving, by a user device in a reduced power state, resource information for receiving a channel state information reference signal (CSI-RS) and tracking reference signal (TRS); exiting the reduced power state to receive the CSI-RS and TRS, based on the resource information; synchronizing with a base station, based on the received CSI-RS and TRS, to receive a downlink control information message; receiving paging information in a first physical downlink shared channel (PDSCH) transmission based on the received downlink control information message; determining whether there is paging information in the first PDSCH transmission for the user device; starting a Random Access Channel (RACH) procedure to make a Radio Resource Control (RRC) connection, based on determining that there is paging information for the user device; and returning to the reduced power state, based on determining that there is not paging information for the user device.

    Codebook subset restriction for enhanced type II channel state information reporting

    公开(公告)号:US12040859B2

    公开(公告)日:2024-07-16

    申请号:US18320839

    申请日:2023-05-19

    Applicant: Apple Inc.

    CPC classification number: H04B7/0456 H04B7/046 H04B7/0626

    Abstract: A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

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