Patent ID: 7180880

Claim:
A transmission power control apparatus comprising: a transmission power control signal extracting section configured to extract a transmission power control signal from a reception signal; a transmission power control signal storage section configured to sequentially store a predetermined number of transmission power control signals extracted by the transmission power control extraction section; a first transmission power control determination section configured to check a sequential number of said transmission power control signals stored in said transmission power control section to determine whether an instruction to increase/decrease transmission power is repeatedly generated, wherein if said instruction to increase/decrease transmission power is not repeatedly generated, said first transmission power control determination section outputs a power change instruction with a transmission power increase/decrease value; a transmission power changing section configured to change transmission power in accordance with the power change instruction; a Doppler effect measuring section configured to compare a slot period of a reception signal with a reference slot period to measure a slot period deviation of a reception wave due to the Doppler effect; and a second transmission power control determination section configured to determine, if said instruction to increase/decrease transmission power is repeatedly generated, whether a deviation of a frequency of a reception wave due to the Doppler effect is equal to or less than a predetermined value, and permit said transmission power changing section to change transmission power if the deviation is greater than the predetermined value.