I. Introduction
Over the last few years, mobile networks have developed extremely and wireless communication standards have become a staple in our daily lives. Successive generations of communications networks have been deployed to provide the “mobile broadband”. The design of cellular networks has witnessed constant improvement aiming to cope with the increasing number of users and growing level of traffic (voice, data, etc.,). The quest for higher bandwidth, faster connection time and seamless handoffs prompted engineers to seek better solutions [1] [2]. In this context, the 4G aims at some essential goals those are very difficult to achieve, such as offering very high data rates for high-speed-moving users or guaranteeing the user a handover without interruption. This has attracted much research to provide a future standard that can improve the Quality of Service (QoS) in terms of throughput, mobility, etc. Although the two wireless networks, namely Worldwide Interoperability for Microwave Access (WiMAX) based on IEEE standards and Long Term Evolution (LTE) standardized by 3GPP, are two competing technologies, they are technically similar [1] [2] [3]. This competition started with the advent of their pre4G versions (802.16e for Mobile WiMAX and 3GPP release 8 for LTE) and continued with the advent of their 4G versions (WiMAX 2.0 based on IEEE 802.16m and LTE-Advanced standardized by Release 10) [1] [2] [3]. Thereby, WiMA3 (IEEE 802.16) standard was established in 1999 and has been changed to 802.16a, 802.16b, 802.16c, 802.16d and more. The most advanced one is 802.16m. In fact, WiMA3 network was standardized by IEEE which has issued a series of standards aiming to provide a metropolitan area data access called Wireless MAN standards. The first in the series that found real applicability was IEEE 802.16d in 2004, which aimed to provide high throughput wireless data to fixed users. IEEE 802.16e in 2005 formed the basis for what is known as Mobile WiMA3. In March 2011, IEEE 802.16m was standardized and was considered for WiMA3 Release 2.0. This offers higher data rates than Release 1.0 and was lately officially recognized as 4G in 2012 [3].