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    TIMING HALF-DUPLEX TRANSMISSIONS
    6.
    发明公开
    TIMING HALF-DUPLEX TRANSMISSIONS 审中-公开

    公开(公告)号：US20240349270A1

    公开(公告)日：2024-10-17

    申请号：US18430384

    申请日：2024-02-01

    Applicant: Space Exploration Technologies Corp.

    Inventor： Peter J. Worters ,  Martin S. McCormick ,  Andrew G. Whitlow

    IPC: H04W72/121 ,  H04B7/185 ,  H04L5/16 ,  H04W56/00 ,  H04W72/1273

    CPC classification number: H04W72/121 ,  H04B7/18513 ,  H04L5/16 ,  H04W56/0045 ,  H04W56/0055 ,  H04W72/1273

    Abstract: Systems, methods, and non-transitory media are provided for timing transmissions in a wireless communication system. An example method can include determining, at a satellite, a maximum round-trip propagation delay associated with one or more user terminals of a plurality of user terminals, determining, based on the maximum round-trip propagation delay, a respective downlink to uplink (DL/UL) offset for each user terminal, wherein the DL/UL offset comprises a time difference between a first downlink frame at the satellite and a first corresponding uplink frame at the satellite, transmitting a first downlink frame, receiving a first uplink frame from a first user terminal associated with the maximum round-trip propagation delay during the first corresponding uplink frame at the satellite, and receiving a second uplink frame from a second user terminal associated with a round-trip propagation delay less than the maximum round-trip propagation delay during the first corresponding uplink frame at the satellite.

    Synchronization of multi-user uplink transmissions
    7.
    发明授权
    Synchronization of multi-user uplink transmissions 有权

    公开(公告)号：US11985611B1

    公开(公告)日：2024-05-14

    申请号：US17339890

    申请日：2021-06-04

    Applicant: Space Exploration Technologies Corp.

    Inventor： Peter J. Worters ,  Martin S. McCormick ,  Matthew J. Monson

    IPC: H04W56/00 ,  H04L5/00 ,  H04W4/02 ,  H04W84/06

    CPC classification number: H04W56/0005 ,  H04W56/0045 ,  H04W56/0055 ,  H04W56/006 ,  H04W84/06 ,  H04L5/0007 ,  H04W4/027

    Abstract: Systems, methods, and non-transitory media are provided for synchronization of multi-user uplink transmissions. An example method can include receiving, by a user terminal, a downlink radio frame transmitted by a satellite; determining, by the user terminal, a downlink propagation delay associated with the downlink radio frame and an uplink propagation delay associated with an uplink radio frame from the user terminal to the satellite; based on the downlink propagation delay and the uplink propagation delay, determining, by the user terminal, an uplink transmission delay indicating an amount of time to delay a transmission of the uplink radio frame to the satellite so the uplink radio frame is received at the satellite at a same target time as one or more additional uplink radio frames from one or more additional user terminals; and transmitting, by the user terminal, the uplink radio frame at a time corresponding to the uplink transmission delay.

    Timing half-duplex transmissions
    8.
    发明授权
    Timing half-duplex transmissions 有权

    公开(公告)号：US11924821B1

    公开(公告)日：2024-03-05

    申请号：US17339860

    申请日：2021-06-04

    Applicant: Space Exploration Technologies Corp.

    Inventor： Peter J. Worters ,  Martin S. McCormick ,  Andrew G. Whitlow

    IPC: H04W72/121 ,  H04B7/185 ,  H04L5/16 ,  H04W56/00 ,  H04W72/1273

    CPC classification number: H04W72/121 ,  H04B7/18513 ,  H04L5/16 ,  H04W56/0045 ,  H04W56/0055 ,  H04W72/1273

    Abstract: Systems, methods, and non-transitory media are provided for timing half-duplex transmissions in a wireless communication system. An example method can include receiving, by a user terminal (UT), a radio frame transmitted by a satellite to a group of UTs; identifying an offset delay defined in the radio frame for scheduling transmissions between the satellite and each UT in the group of UTs, the offset delay providing non-overlapping time intervals for receive, process, and transmit operations at each UT; determining, based on the offset delay and a time when the radio frame was received by the UT, a time for transmitting an uplink radio burst to the satellite, wherein the uplink radio burst transmitted at the time is estimated to arrive at the satellite within a same radio frame interval as uplink radio bursts from other UTs; and transmitting, to the satellite, the uplink radio burst at the time.

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