Method of controlling power upon cell hand-over

摘要

Disclosed is a method for controlling uplink transmission power in a hand-over region by a mobile unit in communication with a base station using a fast cell selection (FCS) scheme. The mobile unit stores transmission power control (TPC) commands received from a plurality of cells in an active set, if the mobile unit enters the hand-over region during communication with a current best cell. If the next best cell is selected from the plurality of cells, the mobile unit determines a transmission power offset 205 by comparing TPC commands from both the current best cell and the next best cell. The mobile unit then transmits initial transmission power for the next best cell at a transmission power determined considering the transmission power offset. Also disclosed is an apparatus for implementing the method as described. The present invention aims to perform more accurate power control in W-CDMA communication systems employing FCS.