Non-terrestrial network link adaptation

A method, comprising:

• causing, by a base station, a first signal to be transmitted from a non-terrestrial station to user equipment during a first transmission time period;
• receiving, by the base station, a communication indicating signal quality for a plurality of times during the first transmission time period;
• obtaining, for the plurality of times, a plurality of fading losses associated with the first signal;
• estimating, for a future time subsequent to the plurality of times, a first fading loss of a first loss type associated with the first signal by at least applying a first filter to the plurality of fading losses;
• estimating, for the future time, a second fading loss of a second loss type associated with the signal by at least determining differences between the plurality of fading losses and the first fading loss;
• calculating signal-to-interference-plus-noise-ratio (SINR) that includes at least one fading loss selected from the first fading loss and the second fading loss;
• causing the non-terrestrial station to transmit a second signal for a second transmission time period that includes the future time, the second signal having first settings for modulation and channel coding parameters, the first settings determined based on the SINR calculated;
• receiving communications indicating successful receipt of a defined number of second signal transmissions during the second transmission period;
• and
• causing, as a result of receiving the communications indicating unsuccessful receipt of the defined number of second signal transmissions, the non-terrestrial station to transmit a third signal to the user equipment according to previous modulation and channel coding parameters for a third transmission period.

A method, comprising:

• causing, by a base station, a first signal to be transmitted from a non-terrestrial station to user equipment during a first transmission time period;
• receiving, by the base station, a communication indicating signal quality for a plurality of times during the first transmission time period;
• obtaining, for the plurality of times, a plurality of fading losses associated with the first signal;
• estimating, for a future time subsequent to the plurality of times, a first fading loss of a first loss type associated with the first signal by at least applying a first filter to the plurality of fading losses;
• estimating, for the future time, a second fading loss of a second loss type associated with the signal by at least determining differences between the plurality of fading losses and the first fading loss;
• calculating signal-to-interference-plus-noise-ratio (SINR) that includes at least one fading loss selected from the first fading loss and the second fading loss;
• causing the non-terrestrial station to transmit a second signal for a second transmission time period that includes the future time, the second signal having first settings for modulation and channel coding parameters, the first settings determined based on the SINR calculated;
• calculating a conservative SINR value based on location information of the user equipment, the conservative SINR value based on a conservative value for the first fading loss type and a conservative value for the second fading loss type;
• receiving one or more communications indicating unsuccessful receipt of the second signal;
• and
• causing, in response to receiving the one or more communications indicating unsuccessful receipt of the second signal, the non-terrestrial station to transmit a third signal according to settings for modulation and channel coding parameters selected based on the conservative SINR value.

A method, comprising:

• calculating, by a base station, a first fading loss associated with signal transmission from a non-terrestrial station to user equipment for a first transmission period;
• determining first modulation and channel coding settings based on the first fading loss;
• causing the non-terrestrial station to transmit a first signal to the user equipment according to the first modulation and channel coding settings during the first transmission period;
• receiving communications indicating whether the first signal was successfully received by the user equipment;
• determining a second fading loss that is different than the first fading loss;
• and
• causing, in response to receiving the communications, the non-terrestrial station to transmit a second signal according to second modulation and channel coding settings different than the first modulation and channel coding settings during a second transmission period;
• receiving a communication indicating unsuccessful receipt of the second signal during the second transmission period;
• and
• causing, in response to receiving the plurality of communications, the non-terrestrial station to transmit a third signal according to the first modulation and channel coding parameters during a third transmission period.

The method of claimer 9, wherein the at least one estimated fading loss value is obtained by at least:

• determining a set of fading losses for a plurality of times;
• applying a low pass filter to the set of fading losses to obtain a first fading loss estimate;
• calculating differences between the set of fading losses and the first fading loss estimate;
• and
• applying a predictive filter to the differences to obtain a second fading loss estimate.

A communication system, comprising:

• a receiver configured to receive communications from terrestrial user equipment and communications from a non-terrestrial network station;
• a transmitter configured to transmit communications to the non-terrestrial network station;
• one or more processors;
• and
• memory storing instructions that, as a result of execution by the one or more processors, cause the communication system to:
• calculate a first fading loss associated with signal transmission from a non-terrestrial station to user equipment for a first transmission period;
• determine first modulation and channel coding settings based on the first fading loss;
• cause the non-terrestrial station to transmit a first signal to the user equipment according to the first modulation and channel coding settings during the first transmission period;
• receive communications indicating whether the first signal was successfully received by the user equipment;
• determine a second fading loss that is different than the first fading loss;
• cause, in response to receiving the communications, the non-terrestrial station to transmit a second signal according to second modulation and channel coding settings different than the first modulation and channel coding settings during a second transmission period;
• and
• implement enhanced modulation and channel coding settings as the second modulation and channel coding settings in response to receiving communications indicating that a number of successfully received first signal transmissions by the user equipment exceed a defined threshold.

A communication system, comprising:

• a receiver configured to receive communications from terrestrial user equipment and communications from a non-terrestrial network station;
• a transmitter configured to transmit communications to the non-terrestrial network station;
• one or more processors;
• and
• memory storing instructions that, as a result of execution by the one or more processors, cause the communication system to:
• calculate a first fading loss associated with signal transmission from a non-terrestrial station to user equipment for a first transmission period;
• determine first modulation and channel coding settings based on the first fading loss;
• cause the non-terrestrial station to transmit a first signal to the user equipment according to the first modulation and channel coding settings during the first transmission period;
• receive communications indicating whether the first signal was successfully received by the user equipment;
• determine a second fading loss that is different than the first fading loss;
• and
• cause, in response to receiving the communications, the non-terrestrial station to transmit a second signal according to second modulation and channel coding settings different than the first modulation and channel coding settings during a second transmission period;
• and
• implement diminished modulation and channel coding settings as the second modulation and channel coding settings in response to receiving communications indicating that a number of unsuccessfully received first signal transmissions by the user equipment exceed a defined threshold.