Exploiting multiuser diversity for OFDMA next generation wireless networks

The mobile networks are continually evolving in order to support more users, to achieve higher data rates, and to provide new (multimedia) services. The next generation networks must be able to service heterogeneous traffic with diverse quality of service (QoS) requirements. Orthogonal frequency division multiple access (OFDMA) is important techniques for high data rate wireless multiuser communication systems, such as 3GPP Long Term Evolution (LTE) and IEEE 802.16 Worldwide Interoperability for Microwave Access (WiMAX), not only because of its flexibility in resource allocation, but also because of its ability to exploit multiuser diversity. The scheduling algorithms that both support the QoS and maintain the throughput required to ensure users´ satisfaction are essential to the development of the next network generation. In this paper, different scheduling techniques were evaluated using OFDMA in several different scenarios. The goal is to analyze the properties of networks such as throughput an fairness.