Patent ID: 6246886
Filing Date: 2001-06-12
Classification: H04W

Abstract:
A method of establishing a dual mode wireless telephone system adjacent to another wireless telephone system having a prescribed wireless protocol, the method comprising:establishing a first wireless telephone system in prescribed coverage areas using the prescribed wireless protocol for communication with dual mode wireless telephones in the prescribed coverage areas according to the prescribed wireless protocol; andestablishing a digital wireless system, overlying the prescribed coverage areas of the first wireless system, for communication with the dual mode wireless telephones according to a prescribed digital wireless protocol, including:(1) transmitting a sync channel signal into a first region of the prescribed coverage areas according to the prescribed digital wireless protocol and at a first power level sufficient for detection by a first of the dual mode wireless telephones in the first region, and(2) transmitting the sync channel signal into a second region of the prescribed coverage areas, having a boundary between the prescribed coverage areas and the another wireless telephone system, according to the prescribed digital wireless protocol and at a reduced power level that renders the sync channel signal undetectable by a second of the dual mode wireless telephones located substantially at the boundary.