Satellite communications system and user terminal providing...

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

Reexamination Certificate

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Details

C455S013200, C455S430000, C370S324000

Reexamination Certificate

active

06920323

ABSTRACT:
In a satellite communications system, where a user terminal10, on the surface of the earth12, can be in diversity communication to an earth station18via two orbiting satellites14, 16at once, and there is a need, at some time, when one of the two satellites14, 16orbits our of range, to engage another satellite22in its place, the user terminal10is operative to suppress TDMA timeslots in its communications with the two satellites14, 16to listen and report on broadcast messages from another satellite22, the suppressed timeslots being based on an assessment of which of the two satellites has the largest path attenuation.

REFERENCES:
patent: 5561838 (1996-10-01), Chandos et al.
patent: 5661724 (1997-08-01), Chennakeshu et al.
patent: 5867109 (1999-02-01), Wiedeman
patent: 5966658 (1999-10-01), Kennedy, III et al.
patent: 6021309 (2000-02-01), Sherman et al.
patent: 6091933 (2000-07-01), Sherman et al.
patent: 6104911 (2000-08-01), Diekelman
patent: 6138012 (2000-10-01), Krutz et al.
patent: 0 748 065 (1996-12-01), None
patent: 0 774 843 (1997-05-01), None
patent: 97/23065 (1997-06-01), None

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