Method and apparatus for a global positioning data service
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United States of America Patent
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Dec 7, 1999
Grant Date -
N/A
app pub date -
Jul 31, 1996
filing date -
Jul 31, 1996
priority date (Note) -
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Abstract
In a telecommunication system (15) with at least one gateway (1), subscriber units (2), system controller (3), at least one communication satellite (4) and global positioning satellites (5), gateway (1) provides a global positioning data service to subscriber units (2). Gateway (1) receives ephemeris and almanac data on link (7) from global positioning satellites (5). Requests for portions of the data are received via link (11) and these portions are transmitted on link (10). Subscriber unit (2) receives on link (6) positioning information which is used by subscriber unit controller (33) to self-determine accurate location data. Subscriber unit (2) transmits a global positioning data service request via link (8) and receives the requested global positioning data service data via link (9).
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