Abstract
Recently, wireless network become much common and widely deployed in human life, improving the performance of total network is an important and popular research in both academy and industry. Power control is one efficient way to improve network performance. The total throughput of clients is related to the bit-rate between the AP and its clients. Nowadays, for a wireless access point, auto rate adaptation and adaptive modulation are two importance techniques to enhance transmission throughput, which were greatly influenced by transmission power. Since software-defined networking has gained popular in recent years, manage wireless network resource in centralized method become a practical and popular way. SDN provides a centralized controller to manage whole wireless network resource that manager can apply more efficient centralized algorithms to improve network performance. In this paper, we first studied the power control problem, auto rate adaptation and adaptive modulation techniques. Finally, we provide a centralized power adjustment algorithm for improving the total throughput of network.