second ed., Academic Press, 2008. [8] IEEE Std 802.16-2009, IEEE Standard for Local and Metropolitan Area Networks - Part 16: Air Interface for Broadband Wireless Access Systems, May 2009. 3G Americas, Mobile Broadband Evolution 3GPP Release 8 and Beyond June 2008. <http://3gamericas.org/>. Recommendation ITU-R .1645, Framework and Overall Objectives of the Future Development of IMT- 2000 and Systems Beyond IMT-2000, June 2003. Recommendation ITU-R M.1822, Framework for Services Supported by IMT, October 2007. [12] WINNER Project, Usage Scenarious, D13 version 1.0, June 2005. <http://www.ist-winner.org> [13] CDMA Development Group (CDG). <http://www.cdg.org> [14] WiMAX Forum. <http://www.wimaxforum.org> [15] REPORT ITU-R M.2134, Requirements Related to Technical Performance for IMT-Advanced Radio Interface(s), October 2008. [16] ITU-T Next Generation Networks Global Standards Initiative. <http://www.itu.int/ITU-T/ngn/>. [17] Internet Message Access Protocol, Wikipedia. <http://en.wikipedia.org/wiki/Imap> [18] Post Office Protocol, Wikipedia. <http://en.wikipedia.org/wiki/Pop3>. [19] Report ITU-R M.2135-1, Guidelines for Evaluation of Radio Interface Technologies for IMT-Advanced, December 2009. 1.4 Introduction to 3GPP standards [20] 3GPP TR 36.913, Requirements for Further Advancements for Evolved Universal Terrestrial Radio Access (E-UTRA) (LTE-Advanced), March 2009. [21] IEEE C80216m-07/002r10, IEEE 802.16m System Requirements, January 2010. [22] Athanasios Papoulis, Probability, Random Variables, and Stochastic Processes, fourth ed., McGraw Hill, 2002. [23] 3GPP TS 23.402, Architecture Enhancements for Non-3GPP Accesses, March 2009. (ftp://fttp.3gpp.org/ specs/). [24] IEEE 802.2 Logical Link Control (LLC). <http://grouper.ieee.org/groups/802/2/>. [25] IEEE 802.3 ETHERNET. <http://grouper.ieee.org/groups/802/3/>. [26] IEEE 802.5 Token Ring standards. (<http://www.ieee802.org/5/www8025org/>. [27] IEEE 802.11 Wireless Local Area Networks. <http://grouper.ieee.org/groups/802/11/> [28] IEEE 802.15 Wireless PAN. <h