ABSTRACT
In 2001, the first IEEE 802.16 standard was approved, followed by several amendments years afterwards [1-5]. The IEEE 802.16 specifies a non-line-of-sight environment for the frequency band of 2-11 GHz; this allows OFDM/OFDMA (orthogonal frequency division multiple access) to be included (WirelessMAN-OFDM and WirelessMAN-OFDMA), which can combat multipath propagation. However, the resource allocation schemes and algorithms remain an open issue [6]. In short, the OFDMA system proves to be a promising technique, but its deployment was not fully utilized up to the present and a lot of research is focusing on the resource management aspects.
