The invention concerns a method for optimizing the Transport Format Combination (TFC) selection procedure processed by a user equipment UE in an uplink communication in a mobile telecommunication network, wherein the TFC procedure during the current TTI (Time Transport Interval) at instant t+1 is performed in function of: a—the remaining power (2) measured after the TFC procedure performed in the past TTI at instant t, b—the power (4) for transmitting the E-DCH channels in the past TTI at instant t, and, c—a minimum specified power (6) for transmitting the E-DCH channels in the next TTI.