US 12,294,445 B2
Systems and methods for a 5G based NGSO air interface
Channasandra Ravishankar, Clarksburg, MD (US); James Jehong Jong, North Potomac, MD (US); Gaguk Zakaria, College Park, MD (US); and John E. Corrigan, III, Chevy Chase, MD (US)
Assigned to HUGHES NETWORK SYSTEMS LLC, Germantown, MD (US)
Filed by HUGHES NETWORK SYSTEMS LLC, Germantown, MD (US)
Filed on Jul. 13, 2022, as Appl. No. 17/863,467.
Claims priority of provisional application 63/233,734, filed on Aug. 16, 2021.
Prior Publication US 2023/0047125 A1, Feb. 16, 2023
Int. Cl. H04B 7/185 (2006.01); H04B 7/195 (2006.01); H04L 27/26 (2006.01); H04W 72/0453 (2023.01); H04W 88/16 (2009.01)
CPC H04B 7/18589 (2013.01) [H04B 7/18515 (2013.01); H04B 7/18573 (2013.01); H04B 7/195 (2013.01); H04L 27/2603 (2021.01); H04W 72/0453 (2013.01); H04W 88/16 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A satellite communication system comprising:
a user terminal with a user terminal physical layer interface;
a satellite gateway with a gateway physical layer interface connected to a terrestrial network;
an air interface for maintaining connectivity between the user terminal physical layer interface and the gateway physical layer interface through a satellite, wherein the air interface includes:
a forward link for communicating from the satellite gateway to the user terminal;
a return link for communicating from the user terminal to the satellite gateway;
wherein the forward link includes a frame with a plurality of sub-frames, the frame being aligned with a global positioning pulse signal from the satellite; and
wherein the plurality of sub-frames include a basic down link map (Basic DLMAP) with a downlink index, wherein the downlink index includes an indication for a number of DLMAPS included in a sub-frame, and a uplink map index that includes an indication whether the sub-frame includes an uplink map.