METHOD OF TRANSMITTING MESSAGES IN TWO-LEVEL SATELLITE COMMUNICATION SYSTEM Russian patent published in 2024 - IPC H04B7/185 

FIELD: communication equipment.

SUBSTANCE: invention relates to satellite systems for transmitting information between low-energy user terminals (UT) and central earth stations (CES) using low-orbit and geostationary relay satellites (RS). Technical result is achieved by the fact that when organizing the communication process, each of the low-orbit RS located on circular near-earth orbits is equipped with a fixed subscriber antenna, beam pattern width is set equal to angle, determined by the low-orbit RS orbit radius and the UT communication minimum elevation angle and measured at all azimuth values relative to the straight line connecting the low-orbit RS location point to the Earth center; shape of the directional pattern of the low-orbit RS subscriber antenna is set in accordance with the directivity function, defined by the ratio of the current values of the length of the subscriber line, polarization losses in it and the gain of the UT antenna within the width of the beam pattern of the low-orbit RS subscriber antenna and the values of the listed parameters when the direction of the subscriber line coincides with the axis of the directional pattern of the subscriber antenna of the low-orbit RS; forming an orbital constellation of at least three geostationary RS equally spaced on the orbit; each geostationary RS is equipped with a fixed inter-satellite antenna, beam pattern width is set equal to angle, determined by the number of geostationary RS in the orbital constellation, orbit radii of low-orbit and geostationary RS and measured at all values of azimuth relative to straight line connecting point of geostationary RS with center of Earth, and the shape of the beam pattern of the inter-satellite antenna of the geostationary RS is set in accordance with the beam function, determined by the ratio of the current value of the length of the inter-satellite link within the width of the beam pattern of the inter-satellite antenna of the geostationary RS and the minimum value of the length of the inter-satellite link; each low-orbit RS is equipped with an inter-satellite antenna with a controlled beam, the field of view of which geostationary RS is set equal to the angle, determined by the number of geostationary RS in the orbital constellation and the width of the beam pattern of the inter-satellite antenna of the geostationary RS, measured at all values of the azimuth relative to the straight line, passing through the point of location of the low-orbit RS and the center of the Earth.

EFFECT: simplifying the process of establishing communication, increasing the efficiency of transmitting messages between the UT and the CES, and reducing power consumption for transmitting messages.

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