Method and apparatus for a global positioning data service

Details Method and apparatus for a global positioning data service Method and apparatus for a global positioning data service

1996-07-31

1999-12-07

Issing, Gregory C.

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

Directive

Including a satellite

34235702, G01S 502

Patent

active

059991259

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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