Yes, you can simulate power management over WiMAX in Wireless Sensor Network Simulator, but there isn't any tutorial or guide available. In order to obtain instructions or a tutorial, I suggest you contact the developers. You can get in touch with them using DStein@cooperlegalgroup.com
or david@djstein.com
email addresses. Also, in order to simulate power management over WiMAX, you can use tools like SENSE or The Network Simulator - ns-2.