Systems and method with different utilization of satellite frequency bands by a space-based network and an ancillary terrestrial network
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United States of America Patent
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Dec 22, 2009
Grant Date -
Oct 27, 2005
app pub date -
Mar 17, 2005
filing date -
Apr 12, 2004
priority date (Note) -
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Abstract
A radioterminal communications system includes an ancillary terrestrial component configured to receive from at least some of a plurality of radioterminals using frequencies from a first satellite frequency band (e.g., an L-band) and to transmit to at least some of the plurality of radioterminals using frequencies from a second satellite frequency band (e.g., an S-band). The system further includes a space-based component configured to communicate with the plurality of radioterminals using at least some of the frequencies from the first satellite frequency band and/or at least some of the frequencies from the second satellite frequency band. In some embodiments the ancillary terrestrial component communicates with radioterminals using a Time Division Duplex (TDD) mode and the space-based component communicates with the same or other radioterminals using a Frequency Division Duplex (FDD) and/or a TDD mode.
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