An Analytical Approach to Enhance the Capacity of GSM Frequency Hopping Networks with Intelligent Underlay-Overlay
Wahida Nasrin, Md. Majharul Islam Rajib · Journal of Communications · 2009
Abstract — Intelligent Underlay Overlay (IUO) scheme is one of the most cost effective solution for capacity enhancement of Global System for Mobile Communication (GSM). However, the overall gain from this type of complex architecture depends on how efficiently it is designed and available radio resources are utilized. This paper proposes a step by step process to design IUO in order to optimize the gain. Here, the network configurations are determined analytically and a traffic model is developed to estimate the traffic distribution among different layers of IUO cell. Equations for frequency reuse in each layer are derived and Frequency Hopping (FH), Power Control (PC) and Discontinuous Transmission (DTX) are integrated. Effect of various parameters on cluster sizes is studied. It is