Some embodiments are directed to a vehicle remote keyless entry system that can control functions of a vehicle can include a transceiver, a processor based controller, and a remote device. The controller is configured to predefine one or more substantially concentric radio frequency authorization zones around the controller that includes at least a first zone and a second zone, a boundary of the second zone being predefined as closer around the controller than a boundary of the first zone. The controller is configured to instruct the transceiver to transmit a polling signal, which can be received by the remote device within the one or more concentric authorization zones, with different polling intervals for each of the first zone and the second zone. The controller selectively enables one or more of the vehicle functions when the controller determines the remote device is located outside of the second zone.