★ Power control is the intelligent selection of transmit power in a communication system for achieving best performance within the system.

★ The performance is depend on context and there are chances to include optimizing metrics like link data rate, network capacity, geographic coverage and range.

★ A higher transmit power translates into a higher signal power at the receiver.

★ The bit error rate will be reduces at the receiver of a digital communication link, by having higher signal-to-noise ratio.

★ Higher transmit power provides more protection against a signal fade in a wireless fading channel.