Dynamic time division duplex (DTDD) access for satellite RAN
AssigneeAST & Science, LLC
InventorsZhi Zhong Yu, Federico Pedro Fawzi
Life of this patent
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Abstract
A ground station communicates with a satellite having a field of view (FOV), the satellite directly communicating with user equipment (UE) over uplink signals and downlink signals. The ground station has a Dynamic Time Division Duplex (DTDD) controller configured to establish UE uplink time slots during which the UE sends UE uplink signals, the UE uplink time slots based on a unique delay for the UE, whereby UE uplink signals are received at the satellite during a same satellite uplink time slot. The controller avoids overlapping uplink and downlink signals being received at the satellite, as well as at the UE.
Claims15
A ground station configured for communication with a satellite having a field of view (FOV), the satellite configured for directly communicating with user equipment (UE) over uplink signals and downlink signals, said ground station comprising:
- a Dynamic Time Division Duplex (DTDD) controller configured to establish a first UE uplink time slot for a first UE at a first distance of the first UE from the satellite and having a first delay, and a second UE uplink time slot for a second UE at a second distance of the second UE from the satellite and having a second delay greater than the first delay;
- wherein the first UE uplink time slot occurs after the second UE uplink time slot;
- and
- whereby UE uplink signals are received at the satellite during a same satellite uplink time slot.
A ground station configured for communicating with a satellite having a field of view (FOV), the satellite configured for directly communicating with user equipment (UE) over uplink signals and downlink signals, said ground station comprising:
- a Dynamic Time Division Duplex (DTDD) controller configured to segregate the satellite FOV into a first center ring and a second concentric ring arranged concentrically about the first center ring, and associating first UEs in the first center ring with a first UE uplink time slot based on a first delay realized at the first center ring and second UEs in the second concentric ring with a second UE uplink time slot based on a second delay realized at the second concentric ring, whereby the first UE uplink time slot occurs before the second UE uplink time slot.
A ground station configured for communicating with a satellite having a field of view (FOV), the satellite configured for directly communicating with user equipment (UE) over uplink signals and downlink signals, said ground station comprising:
- a Dynamic Time Division Duplex (DTDD) controller configured to receive the uplink signals and apply a unique delay to each of the uplink signals to synchronize the uplink signals to a same uplink subframe time slot, wherein the DTDD is configured to establish a first UE uplink time slot having a first delay for a first UE, and a second UE uplink time slot having a second delay for a second UE, the second delay being greater than the first delay;
- wherein the first UE uplink time slot occurs after the second UE uplink time slot;
- and
- wherein UE uplink signals are received at the satellite during a same satellite uplink time slot.
Dependencies are inferred from the claim text.