Patent ID: 6684079
Filing Date: 2004-01-27
Classification: H04B

Abstract:
A method for disturbance-free operation of at least two base stations working according to a Code Division Multiple Access (CDMA) principle in a universal mobile telecommunications system, each of the at least two base stations having a radio field which overlaps with at least one of the radio field of the other base station and a telecommunications radio cell network, the method comprising the steps of:performing an autosynchronization procedure to eliminate disturbing interferences based on overlapping radio fields and identical transmission frequencies, wherein a reserved synchronization channel with a synchronization signal is provided in transmission frames transmitted by each respective base station; producing chip synchronization between the base stations and orthogonality of the codes of the multiple access method upon reception of the respective synchronization signal by the respective base station; and receiving the respective synchronization signal in a reserved random access channel of the respective base station if chip synchronization is produced.