| 摘要 |
The invention is directed to a wireless location tracking device or tag and auxiliary device for use with a home monitoring unit for tracking individuals or objects. The location tracking device has position determining circuitry and first short range wireless circuitry that communicates position data representative of the location of the tracking device to an auxiliary device (or HMU). The auxiliary device has second short range wireless circuitry that communicates with the tracking device and long range communications circuitry that communicates the position data to a remote location. The tracking device can have a first operational mode, when communication is not established with the auxiliary device, wherein the position determining circuitry is maintained in a normal power state. The tracking device can also have a second operational mode, when communication is established between the tracking device and the auxiliary device, wherein the position determining circuitry is placed in a reduced power state. The remote location can include a monitoring station that communicates with the tracking device via the auxiliary device. The monitoring station can direct the tracking device to switch operational modes. In the alternative (e.g., in cases where the tag is unable to contact the CMS) the tag can maintain list of approved auxiliary devices and the tag can make the determination on whether or not switch operational modes. |
