A method for deriving timing information for a femto cell of a wireless communication system comprises a wireless communication unit of the system receiving observed timing data for a femto cell within a macro cell, and observed timing data for the macro cell. Timing difference values between timing offsets for the femto cell and timing offsets for the macro cell are used to determine a central reference timing difference value for the femto cell. The central reference timing difference value is set as reference timing information for the femto cell. A network element and computer program product for implementing the method of the invention are also provided.