System and method for tracking lost subjects

摘要

A system and method for monitoring and tracking the position of a subject comprises, in an exemplary embodiment, a transponder configured for being co-located with the subject and a means for enabling communication between the transponder and a remote GPS-enabled receiver, such as a cell phone or the like, for selectively triangulating the position of the transponder. In the exemplary embodiment, the means for enabling such communication is software that is installed in and executed by the receiver. The software allows the receiver to triangulate the geographic position of the transponder by fixing a first reference point based on the location of the GPS-enabled receiver, fixing a second reference point based on the location of a network broadcast site through which the receiver and transponder communicate, and calculating the location of the transponder based on the angular position of the transponder relative to the network broadcast site.

主权项

1. A method for monitoring and tracking the position of a subject, the method comprising:
installing software in a GPS-enabled receiver for communicating with a transponder, the transponder being co-located with the subject; and triangulating the geographic position of the transponder by:
fixing a first reference point based on the location of the GPS-enabled receiver;fixing a second reference point based on the location of a network broadcast site through which the receiver and transponder communicate; andcalculating the location of the transponder based on the angular position of the transponder relative to the network broadcast site; whereby, the location of the transponder and thus the subject being monitored and tracked may be determined without having to configure the transponder with GPS capabilities.