This thesis contributes in research about Power control, which defined here as adjusting ransmission power of mobile unit and maintaining Signal-to- Interference Noise Ratio (SINR) of received signal at a desired level. Power control helps to prolong the battery life of a mobile phone, reduces interference and increases the capacity of a system. All of these advantages contribute to preserve the Quality of Service (QoS) of a mobile communication link. As main power control constraints multi-path fading, multiple access interface (MAI) and round- trip delay have been taken. Two...