公开(公告)号：US12231220B1

公开(公告)日：2025-02-18

申请号：US17483460

申请日：2021-09-23

Applicant: Apple Inc.

Inventor： Matthew N. Ettus ,  Shahram Talakoub ,  Ian Buckley ,  Sebastian B. Seeber

IPC: H04B7/185 ,  H04W56/00 ,  H04W72/04 ,  H04W72/0446

Abstract: A communications system may include a satellite and user equipment (UE) devices. When the UE devices have uplink (UL) packets to transmit, each UE device may randomly select a time slot within a finite time window associated with a time reference of the satellite. The UE device may identify a path length between itself and the satellite and may generate a timing advance based on the path length, the time reference, and the time slot. The satellite may begin to receive the UL packets within the time window and may search received signals over the time window to identify the UL packets. The satellite may recover data payloads from the identified UL packets and may pass the recovered data payloads up a protocol stack. By limiting the search to the time window, the satellite may correctly distinguish the UL packets while using a minimal amount of processing resources.

公开(公告)号：US11848747B1

公开(公告)日：2023-12-19

申请号：US17483451

申请日：2021-09-23

Applicant: Apple Inc.

Inventor： Matthew N. Ettus ,  Shahram Talakoub ,  Ian Buckley ,  Sebastian B. Seeber

IPC: H04W72/02 ,  H04B7/185 ,  H04W72/044 ,  H04W72/51

CPC classification number: H04B7/18582 ,  H04W72/02 ,  H04W72/044 ,  H04W72/51

Abstract: A communications system may include a satellite and user equipment (UE) devices. When the UE devices have uplink (UL) packets to transmit, each UE device may randomly select a time slot within a finite time window associated with a time reference of the satellite. The UE device may identify a path length between itself and the satellite and may generate a timing advance based on the path length, the time reference, and the time slot. The satellite may begin to receive the UL packets within the time window and may search received signals over the time window to identify the UL packets. The satellite may recover data payloads from the identified UL packets and may pass the recovered data payloads up a protocol stack. By limiting the search to the time window, the satellite may correctly distinguish the UL packets while using a minimal amount of processing resources.