Method and apparatus for call establishment in a satellite commu

Details Method and apparatus for call establishment in a satellite commu Method and apparatus for call establishment in a satellite commu

1995-12-04

1998-03-24

Louis-Jacques, Jacques

Data processing: vehicles, navigation, and relative location

Navigation

Employing way point navigation

701200, 455 132, 379204, 379208, 342352, 310328, 310432, G01C 2100

Patent

active

057323879

ABSTRACT:
A subscriber unit (26) contains location data that expires after predetermined time periods that are based on the subscriber's mobility. When the location data has not expired, the subscriber unit requests access (108) to a satellite communication system (10) by providing location data within an access request message. The communication system performs a quick check (214) to validate the location data. Accordingly, time-consuming geo-location procedures are avoided when a call is initiated or being received. When the location data has expired, the subscriber unit requests access (110) without providing location data within the access request message. The communication system performs a complete geolocation procedure (210) to determine valid location data for the subscriber unit. The location data is sent (211) to the subscriber unit and time stamped (113).

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Modern Science & Technology of Telecommunications, Scientific & Technical Information Center of MPT of China, Nov. 1991, Consecutive No. 142.

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