Patent ID: 8670783

Claim:
A portable radio communication device operating as an infield device within a communication system, the portable radio communication device comprising: a microprocessor; a two-way radio transceiver coupled to the microprocessor; a location sensor coupled to the microprocessor; the microprocessor, two-way radio transceiver and location sensor providing a location capable two-way radio transceiver operating as a geo-fence post and communicating with a plurality of other infield devices within the communication system operating as geo-fence posts and located at a plurality of locations to generate a geo-fence or boundary defining a dynamic region, wherein the dynamic region is set and changed in response to a change in location of one or more of the plurality of other infield devices operating as geo-fence posts; and the communication system further comprising: a network server that sends time based requests to the plurality of infield devices requesting updated location information with which to generate an updated geo-fence.