Patent ID: 8855569

Claim:
A radio frequency (RF) apparatus for sending and receiving wireless communications, the RF apparatus further comprising: an oscillator; a memory configured to store a hailing channel frequency set and a data channel frequency set, the hailing channel frequency set comprising a plurality of hailing channels and the data channel frequency set comprising a plurality of data channels; an antenna operatively configured to send and receive RF communications; and a microprocessor operatively connected to the oscillator, the memory and the antenna, the microprocessor comprising: logic to listen for a first hailing signal to be received on at least one hailing channel selected from the hailing channel frequency set, selecting the at least one hailing channel based upon a system time and a node identification; logic to determine a noise floor for the at least one hailing channel; logic to receive a noise signal on the at least one hailing channel; and logic to adjust the noise floor in response to the noise signal.