Patent ID: 6973323

Claim:
A method of providing boundary information to a user of a mobile telephone comprising: a) determining geographic boundary information regarding mobile telephone usage restriction; b) responsive to the determined geographic boundary information, providing an indication to the user of the mobile telephone of mobile telephone usage restriction, wherein the determining step comprises the sub steps of: c) constructing a first polygon describing a geographic boundary from the geographic boundary information; d) constructing at least one second polygon containing an area that restricts mobile telephone usage within the geographic boundary; and e) comparing the current location of the mobile telephone to the area that restricts mobile telephone usage within the geographic boundary; and wherein the providing step comprises the sub-steps of: f) indicating when the mobile telephone approaches said area that restricts mobile telephone usage within the geographic boundary; g) indicating when the mobile telephone enters said area that restricts mobile telephone usage within the geographic boundary; h) indicating when the mobile telephone is within said area that restricts mobile telephone usage within the geographic boundary; i) indicating when the mobile telephone is exiting the area that restricts mobile telephone usage within the geographic boundary; and j) indicating when the mobile telephone is outside the geographic boundary.