International Journal of Next-Generation Networks (IJNGN) Vol.3, No.3, September 2011 DOI : 10.5121/ijngn.2011.3303 27            Noman Shabbir 1 , Muhammad T. Sadiq 2 , Hasnain Kashif 3 and Rizwan Ullah 4 1 Department of Electrical Engineering, GC University, Lahore, Pakistan noman.shabbir@gcu.edu.pk 2 Department of Electrical Engineering, Blekinge Institute of Tech., Karlskrona, Sweden mtsa09@bth.se 3 Department of Electrical Engineering, COMSATS Institute of IT, Attock, Pakistan hasnain_kashif@comsats.edu.pk 4 Department of Electrical Engineering, COMSATS Institute of IT, Attock, Pakistan rizwan_ullah@comsats.edu.pk ABSTRACT This paper concerns about the radio propagation models used for the upcoming 4 th Generation (4G) of cellular networks known as Long Term Evolution (LTE). The radio wave propagation model or path loss model plays a very significant role in planning of any wireless communication systems. In this paper, a comparison is made between different proposed radio propagation models that would be used for LTE, like Stanford University Interim (SUI) model, Okumura model, Hata COST 231 model, COST Walfisch-Ikegami & Ericsson 9999 model. The comparison is made using different terrains e.g. urban, suburban and rural area.SUI model shows the lowest path lost in all the terrains while COST 231 Hata model illustrates highest path loss in urban area and COST Walfisch-Ikegami model has highest path loss for suburban and rural environments. KEYWORDS Long Term Evolution, LTE, Path loss, Propagation models. 1. INTRODUCTION Long Term Evolution (LTE) is the latest step in moving forward from the cellular 3 rd Generation (3G) to 4 th Generation (4G) services. LTE is often described as a 4G service but it is not fully compatible to 4G standards. An improved version of LTE known as LTE advance is a 4G compatible technology. Both LTE & LTE advance uses the same frequency band. LTE is based on standards developed by the 3rd Generation Partnership Project (3GPP). LTE may also be referred more formally as Evolved UMTS Terrestrial Radio Access (E-UTRA) and Evolved UMTS Terrestrial Radio Access Network (E-UTRAN). Even though 3GPP created the standards for family, the LTE standards are completely new with exceptions where it made sense.