IEEE 802.16 WiMAX is a promising new wireless technol-ogy for providing broadband ubiquitous network access. Asmore and more researchers and industrials are interestedin simulating such networks, a number of WiMAX simula-tors have been emerged in the networking community. Oneof the most recent WiMAX simulator is the one developedfor ns-3. This module provides a standard compliant andwell designed implementation of the standard and benefitsfrom the major enhancements provided by ns-3 (comparedto other network simulators) which has all the capabilitiesof becoming the leading network simulator in near future