SYNCHRONIZATION METHOD FOR BASE STATIONS

The invention relates to a method of synchronizing base stations of a radio communications system. According to said method the base stations can be connected to subscriber stations via a radio interface with time division duplex (TDD) division of the directions of transmission. During the transition between downlink and uplink a first base station transmits a synchronization signal which is received by a second base station. From the synchronization signal the second base station derives a time reference and uses same for its time synchronization. The invention makes use of this protected period. By transmitting the synchronization signal during the transition, i.e. shortly before or during the protected period, no or only relatively few additional radio-technical resources are required.