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    Flexible Aperiodic SRS Triggering in a Cellular Communication System
    241.
    发明申请
    Flexible Aperiodic SRS Triggering in a Cellular Communication System 有权

    公开(公告)号：US20220303998A1

    公开(公告)日：2022-09-22

    申请号：US17439024

    申请日：2020-10-12

    Applicant: Apple Inc.

    Inventor： Haitong Sun ,  Yushu Zhang ,  Huaning Niu ,  Hong He ,  Wei Zeng ,  Chunxuan Ye ,  Oghenekome Oteri ,  Sigen Ye ,  Dawei Zhang ,  Chunhai Yao ,  Jie Cui ,  Yang Tang

    IPC: H04W72/08 ,  H04W72/04 ,  H04L5/00

    Abstract: A cellular base station (BS) which transmits more flexible downlink control information (DCI) to the UE, and a UE capable of receiving and processing a received DCI message. The DCI message may have a DCI format of 0_1 or 0_2 and further may comprise an UL-SCH set to 0, a CSI request field of all 0s and an SRS request field having a nonzero value. The DCI message may indicate to the UE that the UE should: 1) transmit an aperiodic SRS corresponding to SRS request; and 2) that the UE should not transmit on the PUSCH. The DCI may include existing fields that specify either a slot offset or beam information useable when transmitting the aperiodic SRS. The base station may also generate a DCI message with an SRS trigger that is targeted to a plurality of UEs in a group, or a plurality of groups of UEs, for greater efficiency.

    Dynamic Adaptation of Reference Signal Transmissions in Wireless Communications
    244.
    发明申请
    Dynamic Adaptation of Reference Signal Transmissions in Wireless Communications 有权

    公开(公告)号：US20220271886A1

    公开(公告)日：2022-08-25

    申请号：US17438586

    申请日：2021-01-13

    Applicant: Apple Inc.

    Inventor： Hong He ,  Dawei Zhang ,  Wei Zeng ,  Haitong Sun ,  Chunhai Yao ,  Yushu Zhang ,  Seyed Ali Akbar Fakoorian ,  Oghenekome Oteri ,  Weidong Yang ,  Sigen Ye

    IPC: H04L5/00

    Abstract: Transmission of uplink demodulation reference signals (DMRSs) may be dynamically adapted for mobile devices. Downlink control information (DCI) that schedules uplink transmission(s) of the mobile device may include an information element (IE) corresponding to a DMRS to be transmitted by the UE during the uplink transmission(s). The IE enables the mobile device to determine when to transmit DMRSs during the scheduled uplink transmission(s). The mobile device may identify a corresponding DMRS pattern indicated by the IE, with the DMRS pattern defining how many DMRSs to transmit during the uplink transmission(s), how many DMRSs to transmit in a given time interval (TTI) bundle in the uplink transmission(s), how many DMRSs to transmit in a given repetition of the TTI bundle, and/or where the relative position(s) of the DMRSs are within the given repetition and the given TTI bundle. The DMRS patterns may be configured for the mobile device via higher layer signaling or may be hard-coded.

    Uplink transmit switching with multiple timing advance groups
    249.
    发明授权
    Uplink transmit switching with multiple timing advance groups 有权

    公开(公告)号：US12267798B2

    公开(公告)日：2025-04-01

    申请号：US17813783

    申请日：2022-07-20

    Applicant: Apple Inc.

    Inventor： Ankit Bhamri ,  Dawei Zhang ,  Sigen Ye ,  Wei Zeng ,  Yang Tang

    IPC: H04W56/00 ,  H04L5/00

    Abstract: This application relates to wireless communications, including methods and apparatus to manage uplink (UL) transmit switching with multiple timing advance groups (TAGs) for wireless devices. A wireless device is configured to use multiple carriers selected from a set of available carriers that can be associated with different TAGs. When a second set of carriers, used after switching from a first set of carriers, includes carriers that belong to different TAGs, the wireless device determines whether to transmit on one or more first uplink transmission occasions for each of the carriers in the second set of carriers based on whether a first UL transmission occasion for at least one carrier overlaps a switching gap time period. The wireless device can disallow transmission on first UL transmission occasions of one or more carriers to accommodate the overlap.

    Transmission of nominal repetitions of data over an unlicensed spectrum
    250.
    发明授权
    Transmission of nominal repetitions of data over an unlicensed spectrum 有权

    公开(公告)号：US12256369B2

    公开(公告)日：2025-03-18

    申请号：US17441636

    申请日：2020-08-05

    Applicant: Apple Inc.

    Inventor： Chunhai Yao ,  Chunxuan Ye ,  Dawei Zhang ,  Haitong Sun ,  Hong He ,  Oghenekome Oteri ,  Sigen Ye ,  Wei Zeng ,  Weidong Yang ,  Yushu Zhang

    IPC: H04W72/0446 ,  H04L1/08 ,  H04L5/14 ,  H04W16/14

    Abstract: Some aspects of this disclosure relate to apparatuses and methods for implementing transmission of nominal repetitions of data over an unlicensed spectrum. One or more nominal repetitions of data are to be transmitted by a user equipment (UE) over an unlicensed spectrum used for both uplink and downlink transmissions. The one or more nominal repetitions of the data are segmented into multiple actual repetitions of portions of the data. The UE identifies an orphan symbol in an actual repetition of the multiple actual repetitions of portions of the data, and determines a filler symbol to replace the orphan symbol in the actual repetition. In addition, the UE transmits the multiple actual repetitions including the filler symbol in replacement of the orphan symbol to a base station over the unlicensed spectrum.

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