Patent ID: 6341224
Filing Date: 2002-01-22
Classification: H04L,H04W

Abstract:
A transmission power controller of at least one of a base station and a mobile station in a mobile communication system including said base station and said mobile station, comprising:means for measuring a received SIR (signal-to-interference plus noise power ratio); means for comparing a measurement result of said received SIR with a target value of SIR; means for outputting transmission power control information to an opposing station according to a result of said comparing of said measurement result of said received SIR with said target value of SIR; means for receiving and demodulating said transmission power control information; means for controlling transmission power of said opposing station according to said demodulated transmission power control information; means for detecting a CRC (cyclic redundancy check) bit added to a wireless frame signal, and outputting a frame error detection signal when a CRC bit is not detected; means for counting the number of said frame errors in a measuring time which is longer than a SIR measuring period, using said outputted detection signal; means for comparing said number of counted frame errors with a predetermined frame error number setting value; and means for changing said SIR target value according to a result of said comparing of said number of measured frame errors with said predetermined frame error number setting value, by either the base station or the mobile station.