User paging for mobile satellite communications

Details User paging for mobile satellite communications User paging for mobile satellite communications

1994-01-14

1997-04-08

Blum, Theodore M.

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

Directive

Including a satellite

455 131, 455 341, H04B 7185

Patent

active

056192096

ABSTRACT:
A method of initiating communication between a ground station and a mobile handset through a satellite beam includes the steps of transmitting a forward signal indicative of a fixed geographic area covered by each of a plurality of satellites on at least a periodic basis. The location of said mobile handset is registered by storing at least one variable geographic value associated with said forward control signal at said mobile handset. A reverse signal is transmitted from said mobile handset to said ground station which is indicative of a geographic area where said mobile handset was located during registration. At least one variable geographic value associated with said reverse signal is stored in a database accessible to said ground station. The mobile handset determines whether a currently transmitted forward signal matches said variable geographic value stored. If a match is not found, the current location of said mobile handset is re-registered. The ground station determines which of said satellite beams should initiate a call signal to said mobile handset based upon said variable geographic value stored in said database for said mobile handset.

REFERENCES:
patent: 5483664 (1996-01-01), Moritz et al.

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