Patent ID: 6957079

Claim:
A base station transmission power control method, comprising: a) setting a first expected BLER (block error rate) in a portable terminal; b) setting a second expected BLER in the portable terminal, where the second expected BLER is less than the first expected BLER; c) opening a communication channel between the base station and the portable terminal; d) measuring the BLER of transmissions from the base station to the portable terminal by performing a cyclic redundancy check a specified number of times; e) comparing the measured BLER to the first expected BLER; f) if the measured BLER is greater than the first expected BLER, transmitting a transmission power control signal from the portable terminal to the base station, instructing the base station to increase power by a first amount, g) if the measured BLER is less than or equal to the first expected BLER, determining if the measured BLER is zero; h) if the measured BLER is not zero, returning to step (c); i) if the measured BLER is zero, calculate the total BLER measured since the opening of the communication channel between the base station and the portable terminal; j) if the total BLER is greater than the second expected BLER, returning to step (c); k) if the total BLER is less than or equal to the second expected BLER, transmitting a transmission power control signal form the portable terminal to the base station, instructing the base station to decrease power by a second amount.