Patent ID: 11881928
Assignee: THALES
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A space telecommunications system comprising:
a multibeam space relay taken from among a satellite and a high-altitude platform station (HAPS) platform; and
a ground station, serving as interconnection gateway between a fixed terrestrial infrastructure and the space relay;
an access module for accessing the space network formed by the space relay and the ground station, said access module being embedded on board the space relay when the space relay is regenerative or embedded in the ground station when the space relay is transparent,
at least one user space terminal, configured to, in a first step, emit at a given instant T on a random uplink UL data channel and in a predetermined span of frequencies to the space network access module one or more bursts of data predominantly of useful traffic, including an identifier and, when the at least one user space terminal is able to determine or to aid its geo-location, explicit or implicit information regarding the geographical location of said at least one user space terminal;
wherein, the access module is configured to:
in a second step subsequent to the first step, receive and decode the said one or more bursts of data emitted by the at least one user space terminal, associate with the at least one user space terminal a logical beam on the basis of said at least one user space terminal's location information provided in the first step when the at least one user space terminal is able to determine or to aid its geo-location or derived from a received signal carrying said one or more bursts of data emitted when the at least one user space terminal is not able to determine or to aid its geo-location, the associated logical beam wherein the at least one user space terminal lies at the given instant T being a different predetermined fixed geographical area of a set of geographical areas, the set of geographical areas or set of logical beams forming a tiling of a geographical coverage of the multibeam space telecommunications system, and associate in real time with the associated logical beam a plurality of one or more physical emission beams of the space relay which at the given instant T overlap the entirety of said logical beam; and then
in a third step, dispatch to the at least one user space terminal, through a broadcasting beacon whose carrier frequency the at least one user space terminal already knows, an identifier of a downlink DL data channel carrier allocated to the at least one user space terminal and to its associated logical beam and to the plurality of the one or more physical emission beam or beams of the space relay which at the given instant T overlap the entirety of and are associated with the logical beam of the terminal, so as to allow the at least one user space terminal to receive and decode useful and control data which are intended for it.