Actually, the idea of designing an outdoor cellular network based on WLAN IEEE 802.11 results very attractive, due to the several advantages that this technology presents. Itoffers the equipment at a lower cost, operates in unlicensed spectrum and allows higher data rates.If we realize a comparison of the system performancebetween a cellular environment and an isolated single cellscenario we observe that the first situation exhibits aconsiderable decrease, due to co-channel interference, thatrises with the growth of the transmission data rate employed.In this paper, we propose a power control mechanism, as amethod to reduce the interference influence on networkperformance, and to homogenize the behavior of the differentstations in the system. We present its performance underdifferent load conditions and compare this behavior with theoriginal case, without the employment of any power controlmechanism.