Performance Evaluation of Six-Sectored Configuration in Hexagonal WCDMA (UMTS) Cellular Network Layout
Mahato, Shyam Babu (2007)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe20071941
https://urn.fi/URN:NBN:fi-fe20071941
Tiivistelmä
The objective of this master's thesis is to evaluate the optimum performance of sixsectored
hexagonal layout of WCDMA (UMTS) network and analyze the performance at
the optimum point. The maximum coverage and the maximum capacity are the main
concern of service providers and it is always a challenging task for them to achieve
economically. Because the optimum configuration of a network corresponds to a
configuration which minimizes the number of sites required to provide a target service
probability in the planning area which in turn reduces the deployment cost. The optimum
performance means the maximum cell area and themaximum cell capacity the network
can provide at the maximum antenna height satisfying the target service probability.
Hexagon layout has been proven as the best layout for the cell deployment. In this thesis
work, two different configurations using six-sectored sites have been considered for the
performance comparison. In first configuration, each antenna is directed towards each
corner of hexagon, whereas in second configurationeach antenna is directed towards each
side of hexagon. The net difference in the configurations is the 30 degree rotation of
antenna direction. The only indoor users in a flat and smooth semi-urban environment area have been considered for the simulation purpose where the traffic distribution is 100
Erl/km2 with 12.2 kbps speech service having maximum mobile speed of 3 km/hr.
The simulation results indicate that a similar performance can be achieved in both the
configurations, that is, a maximum of 947 m cellrange at antenna height of 49.5 m can be
achieved when the antennas are directed towards the corner of hexagon, whereas 943.3 m
cell range atantenna height of 54 m can be achieved when the antennas are directed
towards the side of hexagon. However, from the interference point of view the first
configuration provides better results. The simulation results also show that the network is
coverage limited in both the uplink and downlink direction at the optimum point.
hexagonal layout of WCDMA (UMTS) network and analyze the performance at
the optimum point. The maximum coverage and the maximum capacity are the main
concern of service providers and it is always a challenging task for them to achieve
economically. Because the optimum configuration of a network corresponds to a
configuration which minimizes the number of sites required to provide a target service
probability in the planning area which in turn reduces the deployment cost. The optimum
performance means the maximum cell area and themaximum cell capacity the network
can provide at the maximum antenna height satisfying the target service probability.
Hexagon layout has been proven as the best layout for the cell deployment. In this thesis
work, two different configurations using six-sectored sites have been considered for the
performance comparison. In first configuration, each antenna is directed towards each
corner of hexagon, whereas in second configurationeach antenna is directed towards each
side of hexagon. The net difference in the configurations is the 30 degree rotation of
antenna direction. The only indoor users in a flat and smooth semi-urban environment area have been considered for the simulation purpose where the traffic distribution is 100
Erl/km2 with 12.2 kbps speech service having maximum mobile speed of 3 km/hr.
The simulation results indicate that a similar performance can be achieved in both the
configurations, that is, a maximum of 947 m cellrange at antenna height of 49.5 m can be
achieved when the antennas are directed towards the corner of hexagon, whereas 943.3 m
cell range atantenna height of 54 m can be achieved when the antennas are directed
towards the side of hexagon. However, from the interference point of view the first
configuration provides better results. The simulation results also show that the network is
coverage limited in both the uplink and downlink direction at the optimum point.