Performance Analysis of WiMAX and LTE Using NS-2

The increasing use of wireless devices and in particular smart phones has resulted the need for greater capacity\ud and higher speed than the existing network technologies. Hence, LTE (Long Term Evolution) and WiMAX\ud (Worldwide Interoper- ability for Microwave Access) became the two leading technologies. Services are\ud increasingly shifting from voice to data and from circuit-switched to packet-switched ones. Battle between LTE\ud and WiMAX technologies is already heating up with WiMAX being ahead due to availability of standards\ud through IEEE 802.16 and is up and running but lacks in substantial roll out plans due to cost. The targets for\ud LTE indicate bandwidth increases as high as 100 Mbps on the downlink, and up to 50 Mbps on the uplink.\ud However, this potential increase in bandwidth is just a small part of the overall improvement LTE aims to\ud provide. This study illustrates the model and representation of LTE links and traffics using NS-2 network\ud simulator and observation of TCP performance investigated. The Evaluation of the network performance with\ud TCP is mainly based on congestion window behavior, throughput, average delay and lost packet