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    Timing improvements for wireless communications systems
    1.
    发明授权
    Timing improvements for wireless communications systems 有权

    公开(公告)号：US12302264B2

    公开(公告)日：2025-05-13

    申请号：US18440963

    申请日：2024-02-13

    Applicant: QUALCOMM Incorporated

    Inventor： Alberto Rico Alvarino ,  Xiao Feng Wang ,  Liangping Ma ,  Ayan Sengupta ,  Jun Ma ,  Huilin Xu ,  Peter Gaal ,  Bharat Shrestha

    IPC: H04W56/00 ,  H04W4/029 ,  H04W74/0833

    Abstract: Non-terrestrial networks (NTNs) may establish uplink (UL) and downlink (DL) radio frame timing structures to efficiently account for propagation delay and propagation delay variation associated with communications in the NTN. NTNs may manage (synchronize) radio frame timing structures of base stations (e.g., satellites) and user equipment (UEs) in the NTN. Further, UEs may determine timing advance (TA) values to be applied to UL transmissions based on their respective scheduling offset (e.g., offset in UL and DL radio frame timing structures), as well as based on propagation delay or round trip time (RTT). As such, served UEs may determine UL timing such that UL transmissions from the UEs to a satellite arrives at the satellite in a time synchronized manner. In other cases, a satellite may determine UL timing, based on reception timing, such that various UEs in the NTN may implement uniform UL and DL radio frame timing structures.

    Transmission part hopping
    2.
    发明授权
    Transmission part hopping 有权

    公开(公告)号：US12301275B2

    公开(公告)日：2025-05-13

    申请号：US17226871

    申请日：2021-04-09

    Applicant: QUALCOMM Incorporated

    Inventor： Iyab Issam Sakhnini ,  Tao Luo ,  Jun Ma

    IPC: H04B1/69 ,  H04W72/21

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a transmission part (TP) hopping configuration that indicates one or more TPs and a TP hopping pattern associated with one or more hops between the one or more TPs. The UE may communicate, with the base station, using a TP of the one or more TPs based at least in part on the TP hopping configuration. Numerous other aspects are described.

    Techniques for providing UE-assistance for a selection of a demodulation reference signal port multiplexing pattern
    3.
    发明授权
    Techniques for providing UE-assistance for a selection of a demodulation reference signal port multiplexing pattern 有权

    公开(公告)号：US12273292B2

    公开(公告)日：2025-04-08

    申请号：US17575363

    申请日：2022-01-13

    Applicant: QUALCOMM Incorporated

    Inventor： Wooseok Nam ,  Xiaoxia Zhang ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Zhifei Fan ,  Tao Luo ,  Jing Sun ,  Jun Ma

    IPC: H04L5/00 ,  H04J13/16

    Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may measure a frequency selectivity of a channel between the UE and a base station and may transmit signaling to the base station indicating one or both of a frequency selectivity metric or a recommended demodulation reference signal (DMRS) port multiplexing pattern based on measuring the frequency selectivity. In some aspects, the UE may transmit the signaling to assist the base station in configuring a DMRS port multiplexing pattern based on current channel conditions. For example, if the frequency selectivity metric satisfies a threshold, the UE may recommend a DMRS port multiplexing pattern absent of code division multiplexing (CDM). Alternatively, if the frequency selectivity metric fails to satisfy the threshold, the UE may recommend a DMRS port multiplexing patter including CDM.

    Wireless communication using multiple types of random access occasions
    6.
    发明授权
    Wireless communication using multiple types of random access occasions 有权

    公开(公告)号：US12232167B2

    公开(公告)日：2025-02-18

    申请号：US17753621

    申请日：2019-10-02

    Applicant: QUALCOMM Incorporated

    Inventor： Xiao Feng Wang ,  Iyab Issam Sakhnini ,  Dan Zhang ,  Huilin Xu ,  Peter Gaal ,  Jun Ma ,  Yiqing Cao

    IPC: H04W74/00 ,  H04W76/10

    Abstract: Certain aspects of the present disclosure provide techniques for supporting multiple types of random access occasions. A method that may be performed by a user equipment (UE) includes receiving, from a base station (BS), an indication of at least two types of random access occasions (ROs) including a first RO type and a second RO type for communicating in a first coverage area of the BS as part of a random access process for the UE to establish a connection with the BS in the first coverage area. The method further includes transmitting, to the BS, a preamble on an RO of one of the first RO type or the second RO type, wherein a preamble format of the preamble is based on whether the RO is of the first RO type or the second RO type.

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