Patent ID: 8359054
Filing Date: 2013-01-22
Classification: H04W

Abstract:
1. A transmission power control method for controlling a transmission power of a transmission acknowledgement channel for uplink user data which is transmitted from a cell controlled by a radio base station to a mobile station, comprising: notifying, from a radio network controller to at least one radio base station controlling a first cell and a second cell, offsets between the transmission power of the transmission acknowledgement channel and a transmission power of a dedicated physical channel, when a mobile station is performing a soft-handover with the first cell and the second cell; determining, at the first cell, a transmission power of a first transmission acknowledge channel based on a notified offset, and transmitting the first transmission acknowledge channel to the mobile station using the determined transmission power; and determining, at the second cell, a transmission power of a second transmission acknowledge channel based on a notified offset, and transmitting the second transmission acknowledge channel to the mobile station using the determined transmission power.