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.

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.