Patent ID: 6370157
Filing Date: 2002-04-09
Classification: H04W

Abstract:
In a wireless communication environment wherein a first base station for a first wireless communications system, is operated within a coverage area of a second base station for a second wireless communications system, and wherein signals transmitted from said second base station are maintained at a predetermined frequency tolerance, a method for automatic frequency control for signals generated by said first base station comprising the steps of:causing a receiving device at said first base station to periodically scan said signals from said second base station; locking the first base station to a frequency of one of said second base station signals; adjusting a carrier frequency of said first base station to said locked second base station frequency; returning the first base station to normal operation, wherein said normal operation is operation within said first wireless communication systems; wherein the step of locking further comprises the step of deriving a carrier frequency reference from the locked second base station frequency; and further comprising the step of adjusting a carrier frequency of said first base station as a function of said derived carrier frequency reference.