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    Managing uplink transmission with multiple timing advance groups
    2.
    发明授权
    Managing uplink transmission with multiple timing advance groups 有权

    公开(公告)号：US12294964B2

    公开(公告)日：2025-05-06

    申请号：US17813792

    申请日：2022-07-20

    Applicant: Apple Inc.

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

    IPC: H04W56/00

    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 select N≥2 radio frequency carriers for UL transmission from M>N available radio frequency carriers and subsequently send UL transmissions to a cellular wireless network based on the configuration. The M available radio frequency carriers are divided into distinct TAGs, each TAG having a distinct timing advance value, and the N radio frequency carriers belong to a single TAG. The wireless device is further configured to switch to a second set of N UL radio frequency carriers, after an uplink switching gap time period, based on a TAG medium access control (MAC) control element (CE), received the cellular wireless network, which specifies a second TAG from which to select the second set of N UL radio frequency carriers.

    Wireless device initiated channel occupancy in unlicensed spectrum
    3.
    发明授权
    Wireless device initiated channel occupancy in unlicensed spectrum 有权

    公开(公告)号：US12289606B2

    公开(公告)日：2025-04-29

    申请号：US17437909

    申请日：2020-10-15

    Applicant: Apple Inc.

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

    IPC: H04W16/14 ,  H04W74/0808 ,  H04W76/10

    Abstract: This disclosure relates to techniques for a wireless device to initiate channel occupancy in unlicensed spectrum in a wireless communication system. The wireless device may establish a wireless link with a cellular base station. The wireless device may determine to perform an uplink transmission to the cellular base station on an unlicensed frequency channel. The wireless device may determine whether the cellular base station has channel occupancy of the unlicensed frequency channel. The wireless device may determine whether to initiate channel occupancy of the unlicensed frequency channel. The decision whether to initiate channel occupancy may be based at least in part on whether the cellular base station has channel occupancy of the unlicensed frequency channel.

    Methods and apparatus for PRACH resource determination and RA-RNTI computation in wireless communication
    5.
    发明授权
    Methods and apparatus for PRACH resource determination and RA-RNTI computation in wireless communication 有权

    公开(公告)号：US12284680B2

    公开(公告)日：2025-04-22

    申请号：US17456304

    申请日：2021-11-23

    Applicant: Apple Inc.

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

    IPC: H04W74/0833 ,  H04W72/0446 ,  H04L27/26

    Abstract: Aspects herein relate to wireless devices, circuits, and methods for determining a PRACH resource mapping comprising a starting symbol position within a reference slot, wherein the starting symbol position is determined based, at least in part, on a subcarrier spacing configuration of PRACH resources of a wireless network that a wireless device is operating on; and using the radio to transmit a RACH preamble and an associated RA-RNTI via the determined PRACH resource mapping. Further aspects herein relate to devices, circuits, and methods for using a modified RA-RNTI for transmission or reception of data over a wireless network, wherein the wireless network has a subcarrier spacing configuration of PRACH resources, wherein a size of the subcarrier spacing configuration of the PRACH resources causes out-of-range RA-RNTI values to be calculated using a legacy RA-RNTI equation in an unmodified form, wherein the range of permissible RA-RNTI values is from 0 to 216−1.

    Sidelink relay selection and re-selection in wireless communication
    8.
    发明授权
    Sidelink relay selection and re-selection in wireless communication 有权

    公开(公告)号：US12267910B2

    公开(公告)日：2025-04-01

    申请号：US17686172

    申请日：2022-03-03

    Applicant: Apple Inc.

    Inventor： Zhibin Wu ,  Chunxuan Ye ,  Dawei Zhang ,  Haijing Hu ,  Haitong Sun ,  Wei Zeng

    IPC: H04W8/00 ,  H04W36/30 ,  H04W52/38 ,  H04W88/04 ,  H04W92/18

    Abstract: Sidelink pathloss between a remote user equipment device (UE) and a relay UE may be determined based at least on transmit power information provided by the relay UE to the remote UE. The remote UE may receive, via a sidelink discovery signal from the relay UE, a message that includes first information representative of a transmit power of the relay UE and/or second information representative of a measured receive signal power of a sidelink solicitation signal previously transmitted by the remote UE and received by the relay UE. The remote UE may determine a sidelink pathloss between the remote UE and the relay UE based at least on the first information and/or the second information. The remote UE may select/reselect a relay UE based on corresponding pathlosses determined for the respective paths between the remote UE and different respective relay UEs.

    Method for beam failure recovery based on unified TCI framework
    9.
    发明授权
    Method for beam failure recovery based on unified TCI framework 有权

    公开(公告)号：US12267702B2

    公开(公告)日：2025-04-01

    申请号：US17438139

    申请日：2021-03-31

    Applicant: Apple Inc.

    Inventor： Yushu Zhang ,  Andre Janssen ,  Haitong Sun ,  Wei Zeng ,  Dawei Zhang ,  Yeong-Sun Hwang ,  Franz J. Eder

    IPC: H04W24/04 ,  H04L5/00 ,  H04W24/08

    Abstract: Apparatuses, systems, and methods for beam failure recovery based on a unified TCI framework. A UE may receive, from a base station, a configuration for a BFR procedure for a CCG. The CCG may include at least two CCs and the UE may periodically receive, from the base station, at least a first BFD RS and a first CBD RS in a first CC included in the CCG. The UE may detect, based on the first BFD RS, a beam failure in at least the first CC and send, to the base station, a BFRQ. The BFRQ may include a candidate beam selected based on at least the first CBD RS and may be sent via a PRACH or MAC CE. The UE may receive, from the base station, a BFR response and apply the candidate beam to the first CC and at least one additional CC of the CCG.

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