Performance Evaluation of 6-Sector Site and Small Cell for Addis Ababa UMTS Deployment Scenario
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Date
2018-11
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AAU
Abstract
The demand for high data rate has been increasing due to various innovative data
services that improve human life. To accommodate the increasing demand with
satisfactory Quality of Service (QoS), operators must continuously improve their network
capacity. To that end, besides deploying a Fourth-Generation (4G) network, already
operational Third-Generation (3G) network capacity can be improved by applying
various capacity improving techniques including six sectorization, adding small cells,
macro site densification, Multiple Input Multiple Output (MIMO) and using multiple
carrier.
In this thesis, capacity challenges of Addis Ababa Universal Mobile Telecommunications
System (UMTS) network are analyzed using real data from network management system.
Further, performance evaluation and comparison of six-sector sites, small cell
deployment and their hybrid deployments are presented in the context of addressing the
capacity challenges. The evaluation is performed using carrier to interference plus noise
ratio (CINR) and throughput metrics and WinProp based propagation computation and
network simulation by applying dominant path pathloss model over building map of
selected deployment area of Addis Ababa.
Results show that full deployment of six-sector has performance improvement compared
to full 3-sector with 2.9 dB CINR and 284.23% DL throughput gains. In addition, 6-sector
with 3-sector (hybrid) has 2.2 dB and 231.05% gain in CINR and DL throughput
compared to full 3-sector deployment respectively. Furthermore, femto with 5%
penetration has 0.3 dB CINR gain over full 3-sector. Based on the results, deployment of
6 sector site (both full and hybrid) can enhance capacity of UMTS network significantly and can elevate the capacity challenges faced. Furthermore, femto also has improved the
capacity and with an increase in penetration ratio, the gain can be further increased.
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Keywords
UMTS Capacity Challenges, Capacity Enhancement Techniques, Six Sectorization, Small Cell, Addis Ababa UMTS Network