Security system including a method and system for acquiring...

Details Security system including a method and system for acquiring... Security system including a method and system for acquiring...

2007-03-27

2007-03-27

Phan, Dao L. (Department: 3662)

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

Directive

Including a satellite

Reexamination Certificate

active

10867320

ABSTRACT:
A security system and a method and apparatus utilize a transmitter and a receiver with a GPS sub-system in a GPS appliance. Ephemeris and almanac data are updated at preprogrammed times within coordinated windows of opportunity. Each GPS receiver is preferably kept in an inactive state to reduce power consumption except at the preprogrammed times and uses time-compressed formats of GPS ephemeris data. An additional receiver makes possible the use of a coordinated window of opportunity whereby the receiver is set to an active state to receive complete ephemeris data sets when transmitted. The security system monitors conditions. Security sensors may respond to a condition to “awaken” a transmitter that may then transmit a report providing the location of the appliance. The report may include manifest information such as the identity of a container to which the GPS system is affixed, the sensor reporting the breach and its location.

REFERENCES:
patent: 5477458 (1995-12-01), Loomis
patent: 5650770 (1997-07-01), Schlager et al.
patent: 5793813 (1998-08-01), Cleave
patent: 6239700 (2001-05-01), Hoffman et al.
patent: 6518889 (2003-02-01), Schlager et al.

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