Telecommunications – Transmitter and receiver at separate stations
Patent
1995-04-28
1997-10-14
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 131, H04B 726
Patent
active
056781849
ABSTRACT:
A satellite cellular communication system includes satellites in motion that project cells upon the surface of the Earth. These cells are in motion and pass over individual subscriber units (26) engaged in communications, thus requiring individual subscriber units (26) to perform handoffs as an active current cell (300) currently servicing them advances. Selection of a subsequent servicing cell requires evaluation of active neighboring cells. A pre-computation of candidate cells is performed in advance according to a cell activation schedule. Active neighboring cells of an active current cell (300) are evaluated and prioritized in advance of individual subscriber unit's need for them. A candidate handoff cell list is then delivered to a satellite (12). A candidate handoff cell list is broadcast to all individual subscriber units (26) located within active current cell (300) for use in handoff decisions.
REFERENCES:
patent: 4728959 (1988-03-01), Maloney
patent: 5483664 (1996-01-01), Moritz et al.
patent: 5509051 (1996-04-01), Barnett et al.
Cutler, Jr. Victor Hawes
Davieau Gerald Joseph
Olds Keith Andrew
Armstrong Darnell R.
Eisenzopf Reinhard J.
Johanson Kevin K.
Motorola Inc.
Whitney Sherry J.
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