Communication system employing spectrum reuse on a spherical sur

Details Communication system employing spectrum reuse on a spherical sur Communication system employing spectrum reuse on a spherical sur

1993-03-15

1994-11-22

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

379 63, 379 60, 455 131, 455 331, 455 341, H04B 7185, H04B 715, H04M 1100, H04Q 700

Patent

active

053673042

ABSTRACT:
Orbiting satellites (12) project footprints (30) on the earth. Each footprint (30) is divided into cells (28). Footprints (30) of nearby satellites (12) overlap one another, and the overlap increases as satellites (12) approach a pole from the equator. Positions of all cells (28) generated by all satellites (12) are simulated (36) at numerous points throughout an orbit. Channel sets are assigned to cells (28) within a reference footprint (30a). This assignment is propagated throughout all footprints (30) except for those footprints (30) residing adjacent one side of a seam (16) between orbits (14) where satellites (12) travel in opposing directions. The channel sets are assigned near the seam (16) in response to previously assigned channel sets. Each satellite (12) stores channel set assignments for its cells (28) at various points throughout its orbit. All satellites (12) switch their communication parameters simultaneously in response to the channel set assignments.

REFERENCES:
patent: 4384362 (1983-05-01), Leland
patent: 4736453 (1988-04-01), Schloemer
patent: 5038398 (1991-08-01), Wills
patent: 5038399 (1991-08-01), Bruckert
patent: 5067147 (1991-11-01), Lee
patent: 5073971 (1991-12-01), Schaeffer
patent: 5134709 (1992-07-01), Bi et al.
An article entitled "Advanced Mobile Phone Service: The Cellular Concept" by V. H. Mac Donald, vol. 58, No. 1, Jan. 1979, pp. 15-40.

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