Patent ID: 7428424
Filing Date: 2008-09-23
Classification: H04W

Abstract:
1. A method of controlling the transmission power of a downlink shared channel (DSCH) in a mobile communication system having a plurality of node Bs and a user equipment (UE) in a soft handover (SHO) region defined as the overlapped area among the cell areas of the node Bs, a first node B transmitting data on the DSCH and a Transmit Power Control (TPC) on a downlink dedicated channel (DL_DCH) to the UE and the other node Bs transmitting TPCs on DL_DCHs to the UE, the method comprising the steps of: generating DSCH power control information for controlling the transmission power of the DSCH based on a channel condition determined by the reception power of a common pilot channel (CPICH) from the first node B; transmitting the DSCH power control information to the first node B; and generating a power control command for the next frame using the frame previously received in the absence of the next DSCH frame to be received, wherein the DSCH power control information is generated at updating time points for relative power offset, and the relative power offset is determined based on a path loss difference measured by the difference between the CPICH signal strength from the first node B and the greatest of CPICH signal strengths from the other nodes B.