Patent ID: 6944470

Claim:
A transmission power control method for a mobile communication system comprising the steps of: determining a target Signal-to-Interference Ratio (SIR); estimating a received SIR of a base station; determining error between the received SIR and the target SIR; determining a power control scheme at a power controller of the base station to determine a power change for the transmission power of a mobile to the base station in proportion to the error; selecting a gain of the power controller to achieve minimum error at a subsequent time instant; and estimating channel variation and using said estimated channel variation in said step of selecting said gain wherein an output function of the estimation is f ⁡ ( x 1 , ⁢ x 2 ) - { 1 x 1 ⁢ ( 1 - γ i tar e i ⁡ ( k ) ) + 1 x 2 ⁢ γ i tar e i ⁡ ( k ) 0 } ⁢ if ⁢ ⁢ e i ⁡ ( k ) ≠ 0 if ⁢ ⁢ e i ⁡ ( k ) = 0 where e i (k) is said error and γ i tar is said target SIR.