Date of Award

January 2015

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Electrical Engineering

First Advisor

Saleh Faruque

Abstract

This thesis presents a new strategy to densify Small Cells (i.e., add more low powered base stations within macro networks) and enhance the coverage and capacity of Heterogeneous Networks. This is accomplished by designing Micro Cell for outdoor applications, Pico and Femtocell for indoor applications. It is shown that, there exists a free space propagation medium in all propagation environments due to Fresnel zones, and the path loss slope within this zone is similar to free space propagation medium. This forms the basis of our development of the present work. The salient feature of the proposed work has two main considerations (a) The cell radius of Small Cells must be within the first Fresnel zone break point, and (b) The minimum inter-cell distance must be greater than twice of Small Cell radius.

The proposed network is simulated in real a radio network simulator called ATOLL. The simulation results showed that densify Small Cells not only enhanced the capacity and coverage of Heterogeneous Networks but also improved the carrier to interference ratio significantly. Since the proposed work allows UE (user equipment) to have Line of Sight (LOS) communication with the serving cell, and UE can have higher uplink (UL) signal to interference plus noise ratio (SINR) that will further allow UE to reduce its transmission power, which will consequently lead to a longer battery life for the UE and reduce the interference in the system.

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