Method and apparatus for system acquisition for a subscriber unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 19, 2000
Grant Date -
N/A
app pub date -
Sep 8, 1998
filing date -
Sep 8, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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