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    Satellite communication method and related communication device
    111.
    发明授权
    Satellite communication method and related communication device 有权

    公开(公告)号：US12047158B2

    公开(公告)日：2024-07-23

    申请号：US17707558

    申请日：2022-03-29

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Chenlei Xu ,  Jianwei Zhou ,  Hejia Luo ,  Xiaolu Wang

    IPC: H04B7/185 ,  H04L27/26 ,  H04W74/08 ,  H04W74/0833

    CPC classification number: H04B7/18513 ,  H04L27/2607 ,  H04W74/0833

    Abstract: The disclosure provides satellite communication methods and related devices. One example method includes generating a random access preamble sequence which includes a cyclic prefix, a sequence part, and a guard interval. The sequence part includes a subsequence A and a subsequence B, or the sequence part includes a subsequence C, and the subsequence C is a time domain superimposed sequence of a subsequence A and a subsequence B. The subsequence A includes at least one preamble symbol, the subsequence B includes at least one preamble symbol, and the subsequence A and the subsequence B are respectively generated by using ZC sequences of different root indexes, a quantity of subsequences A is m, a quantity of subsequences B is m or m−1, and m is a positive integer. The method further includes outputting the random access preamble sequence.

    COMMUNICATION METHOD AND COMMUNICATION APPARATUS
    112.
    发明公开
    COMMUNICATION METHOD AND COMMUNICATION APPARATUS 审中-公开

    公开(公告)号：US20240195487A1

    公开(公告)日：2024-06-13

    申请号：US18586038

    申请日：2024-02-23

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Yu Wang ,  Yunfei Qiao ,  Hejia Luo ,  Ying Chen ,  Rong Li

    IPC: H04B7/185

    CPC classification number: H04B7/18513 ,  H04B7/18519

    Abstract: A communication method and a communication apparatus are provided. The method includes: obtaining, by a first satellite, a PDU, where the PDU includes first information, the first information includes an identifier of a UPF agent, and the identifier of the UPF agent indicates one of one or more UPF agents associated with a last-hop satellite; and forwarding, by the first satellite, the PDU to a second satellite, where the second satellite is a next hop that is of the first satellite, that corresponds to the first information, and that is determined from at least one correspondence pre-stored by the first satellite, and each of the at least one group of correspondences indicates a correspondence between one piece of first information and a next hop.

    Timing advance (TA) determining method and apparatus for terminal device
    113.
    发明授权
    Timing advance (TA) determining method and apparatus for terminal device 有权

    公开(公告)号：US11985697B2

    公开(公告)日：2024-05-14

    申请号：US17513546

    申请日：2021-10-28

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Ying Chen ,  Hejia Luo ,  Rong Li ,  Jun Wang

    IPC: H04W76/00 ,  H04W56/00 ,  H04W74/00 ,  H04W74/0833 ,  H04L27/26

    CPC classification number: H04W74/006 ,  H04W56/0045 ,  H04W74/0833 ,  H04L27/26025

    Abstract: This application provides a TA determining method and apparatus for a terminal device. After receiving a TA adjustment parameter sent by an access network device and determining that a TA of the terminal device needs to be adjusted, the terminal device determines a TA scaling factor, a subcarrier spacing parameter, and a first TA, to jointly adjust the first TA to obtain a second TA. ATA adjustment parameter k is added when the terminal device determines the second TA, so that an adjustable range of the TA is larger. Therefore, the TA may be applied to determining the TA of the terminal device when the terminal device communicates with a satellite base station. In this way, the terminal device can adjust the TA when movement of a device is caused by both the terminal device and the satellite base station.

    Timing advance update method, terminal, and base station
    114.
    发明授权
    Timing advance update method, terminal, and base station 有权

    公开(公告)号：US11968640B2

    公开(公告)日：2024-04-23

    申请号：US17407526

    申请日：2021-08-20

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Chenlei Xu ,  Jianwei Zhou ,  Zhenjun Jiang ,  Hejia Luo

    IPC: H04W56/00 ,  H04W84/06

    CPC classification number: H04W56/005 ,  H04W56/0035 ,  H04W56/009 ,  H04W84/06

    Abstract: This application provides an example timing advance update method, an example terminal, and an example base station. One example method includes receiving, by a terminal, an updated timing advance TA value and a beam cell identity of a beam cell in which the terminal is located that are sent by a base station. The example method also includes obtaining, by the terminal, corresponding TA compensation information based on the beam cell identity. The example method further includes performing, by the terminal, TA compensation in a TA update period based on the updated TA value and the TA compensation information. The example method also includes sending, by the terminal, uplink data by using a TA value obtained after TA compensation is performed.

    WIRELESS COMMUNICATION METHOD AND APPARATUS
    116.
    发明公开
    WIRELESS COMMUNICATION METHOD AND APPARATUS 审中-公开

    公开(公告)号：US20230354438A1

    公开(公告)日：2023-11-02

    申请号：US18331950

    申请日：2023-06-09

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Xiaolu Wang ,  Hejia Luo ,  Rong Li ,  Jun Wang

    IPC: H04W74/08 ,  H04B7/01 ,  H04W56/00

    CPC classification number: H04W74/0833 ,  H04B7/01 ,  H04W56/005

    Abstract: Embodiments of this application provide a wireless communication method and an apparatus. The method includes: A first communication apparatus receives first information, where the first information indicates a determining threshold of a parameter in a first parameter set, and the first parameter set includes at least one of the following parameters: location information, delay information, a timing advance rate, a rate of the timing advance rate, a Doppler value, a Doppler rate, and remaining coverage time. The first communication apparatus determines, based on the first information, whether an access condition is met, and performs random access when the access condition is met. This avoids a random access failure in a current cell and re-access in a next cell due to random access performed when the condition is not met.

    Parameter Update Method and Related Apparatus
    119.
    发明公开
    Parameter Update Method and Related Apparatus 审中-公开

    公开(公告)号：US20230254830A1

    公开(公告)日：2023-08-10

    申请号：US18301050

    申请日：2023-04-14

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xiaolu Wang ,  Hejia Luo ,  Jianwei Zhou ,  Rong Li ,  Jun Wang

    IPC: H04W72/0446 ,  H04W72/0453

    CPC classification number: H04W72/0446 ,  H04W72/0453 ,  H04W84/06

    Abstract: A terminal apparatus receives a parameter that is configured by a network apparatus and that is used to calculate an update period, where the update period is used to indicate time at which the terminal apparatus receives an uplink time-frequency synchronization parameter. The terminal apparatus receives an updated uplink time-frequency synchronization parameter based on the update period. The network apparatus configures the parameter for calculating the update period, so that the terminal apparatus can update the uplink time-frequency synchronization parameter in time.

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