Patent ID: 6011973
Filing Date: 2000-01-04
Classification: H04W

Abstract:
A system for restricting operation of a cellular telephone based on the geographical location of the cellular telephone comprising:in the cellular telephone:a locating device within the cellular telephone for ascertaining the geographical location of the cellular telephone;a transceiver for transmitting to a serving cellular telephone network the geographical location of the cellular telephone in accordance with network requests; anda controller for disabling the transceiver from transmitting in response to receiving a signal from the cellular telephone network denying operation of the cellular telephone; andin the serving cellular telephone network:means for determining whether the cellular telephone is allowed to operate in the ascertained geographical location;means for dynamically increasing the rate of which the serving cellular telephone network requests location updates from the cellular telephone as the ascertained geographical location of the cellular telephone approaches a restricted area; andthe serving cellular telephone network further for transmitting a signal authorizing or denying operation of the cellular telephone.