CPC H04W 72/54 (2023.01) [H04B 17/336 (2015.01); H04B 17/382 (2015.01); H04L 1/0003 (2013.01); H04L 1/0009 (2013.01); H04W 72/21 (2023.01)] | 20 Claims |
1. A method comprising:
transmitting, from a satellite, a first uplink map grant to a user terminal and a first uplink modulation and coding scheme for the user terminal, the first uplink map grant identifying which parts of a frame the user terminal is granted for transmitting user terminal data on an uplink channel to the satellite;
transmitting, from the satellite and to the user terminal, a data packet data unit according to a first downlink modulation and coding scheme for a satellite-to-user terminal downlink;
receiving, at the satellite and from the user terminal, an uplink packet data unit having a downlink block error rate and a downlink signal-to-noise-ratio generated by the user terminal;
parsing, at the satellite, physical channel information from the uplink packet data unit;
extracting, at the satellite and based on the physical channel information, error vector magnitude data to generate an uplink signal-to-noise-ratio;
generating a new uplink signal-to-noise-ratio based on a combination of a previous uplink signal-to-noise-ratio times a weighting coefficient and the uplink signal-to-noise-ratio; and
generating, by the satellite, a second uplink modulation and coding scheme for the user terminal and a second downlink modulation and coding scheme for the satellite-to-user terminal downlink based on one or more of the downlink block error rate, the downlink signal-to-noise-ratio, and the new uplink signal-to-noise-ratio.
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