Patent ID: 6983161

Claim:
A network part in a cellular radio network comprising: a base station, the base station comprising a local clock; a network element connected to the base station via an asynchronous data transmission connection, the network element comprising a reference clock; the reference clock comprising means for generating a time stamp signal and means for sending the time stamp signal over the asynchronous data transmission connection from the network element to the base station; and the base station comprising means for receiving the time stamp signal sent over the asynchronous data transmission connection, means for calculating on the basis of the received time stamp signal how much the time by the local clock at the base station deviates from the time by the reference clock, means for generating a speed correction factor for the local clock on the basis of at least one calculated deviation, means for correcting the running of the local clock with the speed correction factor, and a frequency synthesizer for generating the frequencies needed at the base station by using the local clock corrected with the speed correction factor.