Monitor system, terminal unit, monitor system control...

Details Monitor system, terminal unit, monitor system control... Monitor system, terminal unit, monitor system control...

2005-04-13

2008-03-11

Nguyen, Duc M. (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S404200, C455S456300, C455S457000

Reexamination Certificate

active

07343166

ABSTRACT:
A terminal unit is attached to a monitoring object. The terminal unit locates its position via a position-related signal from a satellite positioning system. The terminal unit acquires first-located position information first, and then second-located position information upon a lapse of a predetermined positioning interval after the first-located position information is acquired. When the first-located position is within a permissible moving zone and the second-located position is outside the permissible moving zone, the terminal unit acquires third-located position information before the predetermine positioning interval lapses. If the third-located position is still outside the permissible moving zone, then the terminal unit sends a reporting signal to a monitor apparatus. The monitor system reduces occurrences of inaccurate reporting signals.

REFERENCES:
patent: 2305285 (1997-04-01), None
patent: 2306736 (1997-05-01), None
patent: 2320973 (1998-07-01), None
patent: 2002-331914 (2002-11-01), None
patent: 2003-027529 (2003-01-01), None
patent: 2003-046423 (2003-02-01), None
patent: 2004-046741 (2004-02-01), None
patent: 2004-106802 (2004-04-01), None
patent: WO 02/35492 (2002-05-01), None

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