angle (ODA) is based on maximum service probability of low and high traffic volume scenarios.The simulation results indicate that an
increase of the antenna height changes expectedly the optimum downtilt angle; 10 m increase in the antenna
height corresponds roughly to 1
o
increase of the ODA.For all network
configuration, ODAs increase as a function of antenna height and decrease as a function of site spacing.Hence, with an
optimum downtilt angle, network coverage is guaranteed, and simultaneously, other-cell interference is mitigated
as efficiently as possible.For the 3-sectored configurations with 6
o vertical beamwidth, the optimum downtilt angle varies between
4.3
o-8.1
o depending on the network configuration and downtilt scheme.In the 3-sectored configurations with 12o vertical
beamwidth, the evaluated optimum downtilt angles range between 3.5
o-10o
(Table IV).