Patent ID: 6351643
Filing Date: 2002-02-26
Classification: H04W

Abstract:
A method for determining candidate frequencies for minimizing interference in a communications link between a private radio system and an overlaying communications system, said method comprising the steps of:identifying a plurality of frequencies usable by the private radio system; performing a first plurality of measurements on each frequency of said plurality of frequencies; averaging said first plurality of measurements for said each frequency over a first time period; creating a first ordered list of frequencies based on said averaged first plurality of measurements, wherein said first ordered list of frequencies is arranged according to an amount of interference indicated by said averaged first plurality of measurements; selecting a subset list from said first ordered list of frequencies, wherein said subset list contains frequencies having a lower amount of interference relative to frequencies not selected for said subset list from said first ordered list of frequencies; averaging a second plurality of measurements for each frequency in said subset list, wherein said second plurality of measurements corresponds to a second time period smaller than said first time period; creating a second ordered list of frequencies based on said averaged second plurality of measurements, wherein said second ordered list of frequencies is arranged according to an amount of interference indicated by said averaged second plurality of measurements; selecting a set of optimal frequencies from said second ordered list of frequencies, wherein said set of optimal frequencies include frequencies from said second ordered list of frequencies having a lower amount of interference relative to frequencies not selected for said set of optimal frequencies from said second ordered list of frequencies; and generating a plurality of discrete hop lists from said set of optimal frequencies.