The wide band wireless access technology is one of the most potential prospects in the next generation communication network

which attracts more and more people’s attention. WiMAX is just the focus in the wide band wireless access field. According to the recent progress of network group in WiMAX forum

basic WiMAX network reference model and reference points are introduced in this article. After that

some network functions such as IP address assignment

security architecture and QoS are presented.