CPC H04W 56/0045 (2013.01) [H04B 7/18528 (2013.01); H04W 56/006 (2013.01); H04W 88/16 (2013.01)] | 20 Claims |
1. A method for determining inroute frame timing for a burst, the method comprising:
receiving an appointment to transmit, on an inroute, at a start of a slot X of a frame number M;
establishing an arrival time of a Super Frame Numbering Packet (SFNP) comprising a frame number N;
calculating, based on a satellite ephemeris vector, a timing offset (TRO) to be applied to the arrival time to compensate for a time varying gateway-satellite-terminal propagation delay based on a propagation time from gateway to satellite plus a propagation time from satellite to terminal (THS+TSR);
setting a transmit instant as an end of the TRO after the arrival time;
adding to the transmit instant a duration of X slots and a duration of (M-N) frames; and
transmitting the burst, on the inroute from the terminal, at the transmit instant,
wherein a gateway receives the burst in the slot X within the frame number M of the inroute, and N is greater than or equal to M.
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