Performance Analysis of Wi-Fi and LTE-LAA/LTE-U

Abstract

Extensive proliferation of Internet and data services over the past decade has turned the interest of researchers toward unlicensed spectrum in radio space. The unlicensed band is especially appealing as a result of enormous accessibility of uninhibitedly available range. LTE portable organizations has seen a staggering ascent in the course of recent years and to serve the immensely expanding information clients and to give upgraded insight to versatile broadband customers, utilizing unlicensed range which has increased an inescapable interest. But the impact of such a utilization on the long existing unlicensed users such as Wi-Fi is significant and accountable, and hence, design of such network topology is challenging. In the context of LTE, LTE-U and LAA-LBT have been emerged as the technology of choice in order for it to coexist with other wireless technologies which has been long existing in unlicensed band. With introduction to coexistence of LTE and Wi-Fi and deliberating coexistence scenarios, the performance of various network deployments such as LTE-U vs Wi-Fi and LTE-LAA vs Wi-Fi has been evaluated. Deployment scenarios of LTE and Wi-Fi in 5 GHz band with duty cycle-based mechanism and LBT based mechanism in the 5 GHz band are evaluated in terms of various performance parameters. The coexistence network topology was simulated in the basic scenario using NS3, and the improvement in performance was demonstrated and evaluated in terms of throughput, latency and jitter. Performance of transport layer protocols were compared using a coexistence model in an indoor scenario.