US 12,489,519 B2
Methods for the transmission of data between a resource constrained device and a non-geostationary satellite and associated system
Antonin Hirsch, Issy-les-Moulineaux (FR); Geoffroy Brichler, Issy-les-Moulineaux (FR); and Florian Collard, Issy-les-Moulineaux (FR)
Assigned to EUTELSAT SA, Issy-les-Moulineaux (FR)
Appl. No. 18/012,163
Filed by EUTELSAT SA, Issy-les-Moulineaux (FR)
PCT Filed Jul. 2, 2020, PCT No. PCT/IB2020/000886
§ 371(c)(1), (2) Date Dec. 21, 2022,
PCT Pub. No. WO2022/003387, PCT Pub. Date Jan. 6, 2022.
Prior Publication US 2023/0275651 A1, Aug. 31, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/185 (2006.01); H04B 7/195 (2006.01)
CPC H04B 7/18513 (2013.01) [H04B 7/195 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for the transmission to at least one non-geostationary satellite of at least one piece of data stored by a ground-based device, the method being carried out by the ground-based device and comprising:
entering an awaken mode,
performing successive Doppler shift estimations, a Doppler shift estimation of the Doppler shift estimations comprising:
receiving, by the ground-based device during the awaken mode, at least one signal from the non-geostationary satellite, the signal comprising at least one frequency parameter of the current reception frequency used by the non-geostationary satellite and at least one elevation emission criterion,
performing a Doppler shift estimation based on the frequency of the received signal;
estimating a Doppler rate of frequency change to obtain a position of the ground-based device relative to the position of the non-geostationary satellite, the estimation being carried out by using an estimation method on a plurality of computed Doppler rates of frequency change, the computing of a Doppler rate of frequency change comprising deriving the Doppler shift estimations,
defining a transmission window, the transmission window being a period of time during which the position of the ground-based device relative to position of the non-geostationary satellite verifies the elevation emission criterion,
when, at a transmission time comprised in the transmission window, the position of the ground-based device relative to the position of the non-geostationary satellite verifies the elevation emission criterion:
emitting, at the transmission time and at the current reception frequency, at least one signal comprising at least the piece of data stored by the ground-based device.