Optimization framework for derogating SDCCH and TCH congestions in Liberia global system for mobile communications (GSM)
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Date
2014-07-21
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Abstract
In GSM communications, congestion remains a major factor and stands as a high influence in
the satisfaction of subscribers and service providers[1]. Traffic Channel (TCH) and
Standalone Dedicated Control Channel (SDCCH) Congestions are two major problems faced
in GSM networks. This thesis attempted to investigate the causes of SDCCH & TCH
congestions, and the assessment of the current state of GSM networks in Liberia by using a
Liberian GSM network‟s KPI (key Performance indicator) as case study to develop an
optimized GSM network model.
During the sampling and processing of the data in the investigation, a range of 49-0% was
chosen as the worst call setup success rate (WCSSR). These WCSSR locations along with
their various SDCCH & TCH congestion results were later plotted into bar chart graphs, and
point graphs using OriginPro software. Finally, a Sugeno-Takagi KPI Optimization
simulation setup was developed using Adaptive Network Fuzzy Inference System (ANFIS)
model in MATLAB. The simulations compares and demonstrates the current and expected
optimized network. The result shows that optimization is possible and can be almost at the
maximum level in real cellular networks.
Description
A thesis submitted to the Department of Electrical/Electronic Engineering,
Kwame Nkrumah University of Science and Technology in fulfillment of the
Requirements for the degree
Of
Master of Science (Telecommunications Engineering), 2014