Method and apparatus for system acquisition for a subscriber uni

Details Method and apparatus for system acquisition for a subscriber uni Method and apparatus for system acquisition for a subscriber uni

1998-09-08

2000-12-19

Urban, Edward F.

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455430, 455 133, H04B 7185

Patent

active

061636797

ABSTRACT:
A method for system acquisition for a subscriber unit (112) in a satellite communication system (100) maximizes life of a battery (320) of a battery-powered subscriber unit. A receiver (304) of the subscriber unit is energized only when ring bursts are expected from satellites in the system, serving to minimize consumption of battery power. During just two scans, the subscriber unit acquires enough information to enable it to identify the best beam for monitoring for a ring alert and to predict the nearby beams most likely to carry a ring alert targeted for the subscriber unit. From the received information, the subscriber unit can also perform necessary processes such as passive geolocation. The subscriber unit then enters a low-power standby mode, energizing the receiver only long enough to detect the best beam to scan for a ring alert targeted for the subscriber unit.

REFERENCES:
patent: 5257019 (1993-10-01), Schwendeman et al.
patent: 5539921 (1996-07-01), Tayloe et al.
patent: 5596315 (1997-01-01), Olds et al.
patent: 5790951 (1998-08-01), Tayloe et al.
patent: 5930679 (1999-07-01), Olds et al.
patent: 5974316 (1999-10-01), Tayloe et al.

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