Conerage and capacity improvements in the 3.5g cellular network modefication

Dissertant

Shbyr, Ahmad Shukri Shakir

Thesis advisor

Abu Hadrus, Ammar Muhammad
Musa, Anwar Muhammad

University

Islamic University

Faculty

Faculty of Engineering

Department

Electrical Engineering Department

University Country

Palestine (Gaza Strip)

Degree

Master

Degree Date

2010

English Abstract

3.5G Cellular networks have a great advantage over the 3G cellular networks.

This advantage comes from splitting the two-way symmetric connections into two asymmetric connections.

This splitting allows data communications with all their applications such as web browsing and files transferring.

But these 3.5G cellular networks, as their predecessor, suffer a major problem due to the adopted multiple access scheme.

Theoretically, the scheme accepts an infinite number of users, while practically, as the number of users increases, the quality of service degrades and the covered area shrinks.

Eliminating this obstacle increases the performance of the 3.5G cellular network.

This elimination is our main objective, which is increasing the number of users while maintaining the covered area without shrinking.

To meet our main objective and justify it practically, it is splitted into two separate but complementary sub-objectives.

The first sub-object is modifying the parameters of the 3.5G cellular network, such as redialing mode and Service Activity Factor, and modifying the 3.5G cellular network itself by cell splitting and sectoring to improve the coverage and capacity.

An original cellular network is established and its metrics; number of connected users, number of blocked users, number of disconnected users and number of handovers done by users are recorded.

Then a modification is applied and the metrics are recorded again.

The improvement is measured by comparing the metrics after modification to the metrics before modification.

The second sub-objective is developing (designing, programming, coding and running) a simulation platform to produce numeric results which are analyzed to justify the predictions without using any existing simulation package or software.

Simulation results prove the enhancement in coverage and capacity of the 3.5G cellular networks.

Cell splitting and sectoring improve the coverage and capacity of the network proportional to the splitting and sectoring level, with a low transmitted power advantage for splitting.

Also varying the Service Activity Factor and the redial mode improve the coverage and the capacity of the network.

But the amount of improvement depends on the choice of variance.

Coding and programming of the simulation platform is done with C++.

Visualizing the results is performed using MATLAB to facilitate reading and comparing tons of results’ files.

Main Subjects

Electronic engineering

No. of Pages

124

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-301358