Active wireless tag and auxiliary device for use with monitoring center for tracking individuals or objects

摘要

The invention is directed to a location tracking device and auxiliary device for use with a monitoring center for tracking individuals or objects. The location tracking device has position determining circuitry and first wireless circuitry that communicates position data representative of the location of the tracking device to a remote location (e.g., a monitoring station). The tracking device also has second wireless circuitry that communicates with the auxiliary device. The tracking device has at least two operational modes and switches between these modes when communication is established between the tracking device and the auxiliary device so long as one or more predetermined conditions are satisfied. In one operational mode the position determining circuitry of the location tracking device is in a normal power state and in another operational mode such circuitry is in a reduced power state.