Power saving operation in a GPS-based asset tracking unit

Details Power saving operation in a GPS-based asset tracking unit Power saving operation in a GPS-based asset tracking unit

2006-09-05

2006-09-05

Phan, Dao L. (Department: 3662)

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

Directive

Including a satellite

Reexamination Certificate

active

07102565

ABSTRACT:
A GPS receiver is activated and it is determined whether the GPS receiver has received within a first predetermined attempt period of time a set of GPS signals that is adequate to determine a location of the GPS receiver. If not, the GPS receiver is deactivated for a first delay period of time. The GPS receiver is then activated again and it is determined whether the GPS receiver has received a complete set of GPS signals within a second predetermined attempt period. If not, the GPS receiver is deactivated for a second delay period of time that is longer than the first delay period of time. The GPS receiver is then activated once more and again attempts to acquire a complete set of GPS signals.

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patent: 6392593 (2002-05-01), Pemble
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patent: 6778135 (2004-08-01), Warloe et al.
patent: 2004/0095272 (2004-05-01), Warloe et al.

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