Patent ID: 7536105

Claim:
A W-CDMA base station in which a base band processing device and remote radio devices are divided, and the base band processing device and a plurality of remote radio devices are connected by optical cables, wherein the base band processing device inserts a synchronous signal into downward data to which a dispersion process is applied, transmits the downward data to the remote radio devices, extracts the synchronous signal from upward data transmitted from the remote radio devices, and controls the timing when the dispersion process for the downward data starts based on the time from an insertion timing when the synchronous signal is inserted into the downward data to an extracting timing when the synchronous signal is extracted from the upward data; and wherein each of said the remote radio devices extracts the synchronous signal from the downward data transmitted from the base band processing device and inserts the synchronous signal into the upward data at an insertion timing which is based on an extraction timing when the synchronous signal is extracted from the downward data, wherein the insertion timing corresponds to the extraction timing added to a fixed timing for other processings performed by the base band processing device.