Changes
/* Network entry and initialization */
[[Image:Service establishment procedure of OFDMA TDD WMAN (including QoS negotiation).jpeg|center|800 px|thumb| [http://www.wimaxforum.org/technology/WiMAX_IMT_2000/8F_1359.doc <font size = "3">'''Service establishment procedure of OFDMA TDD WMAN(including QoS negotiation)'''</font>]]]
[[Image:Network Entry Process.jpg|center|800 600 px|thumb| [http://inst.eecs.berkeley.edu/~ee122/sp07/80216.pdf <font size = "3">'''Network Entry Process'''</font>]]]
[[Image:Signalling dia for Authentication.jpg|center|800 600 px|thumb|<font size = "3">'''Signalling diagram for Authentication'''</font>]]
===Ranging===
