WiMAX as my research..

This is my research about WiMAX.. a technology standard issued by IEEE 802.16

WiMAX (Worldwide Interoperability Microwave Access) is a wireless networking system based on the IEEE 802.16 standards family. The version 802.16-2004, published in October 2004, supports various kinds of network topology. One of topology is called PMP (Point-To-Multipoint).

Within this topology every Mobile Station (MS) communicate directly via Base Station (BS). The second topology is denoted MESH. In this mode, two MSs communicate without employment of BS. The 802.16-2004 does not support handovers between cells. Consequently, 802.16-2004 allows only a fixed or nomadic access. Handover procedures are implemented in newest version of 802.16e,standardized in September of 2005. This version specifies handovers for portability and simple or full mobility of users.

WiMAX uses OFDM for it's modulation which is known as the best modulation method for a wireless access networking, but it's very complicated, so it is my problem to continue my research. I'm stuck here!

My point is to know about QoS of this WiMAX and try to simulate the system with software MATLAB 7.0.4 (simulink).