Analysis of Design Parameters in Flexible Reuse Deployments of OFDMA Downlink Cellular Networks
Increasing the capacity of wireless cellular networks
has always been an important objective. To achieve high capacity,
full frequency reuse is considered in 5G systems by the research
community. However, the efficient Inter Cell Interference (ICI)
mitigation methods are required since full reuse deployment leads
to the problem of ICI in cellular networks. To improve the user
performance, a flexible Fractional Frequency Reuse (FFR) has
been emerged as a solution in recent times by overcoming the
ICI. However, FFR has three important design parameters, such
as Signal to Interference plus Noise Ratio (SINR) threshold,
bandwidth ratio and power ratio. The optimal choice and
configuration of the design parameters is very important as
their configuration determines network performance. Hence,
it appears highly desirable to investigate the impact of the
parameters on the system performance. This paper investigates
the impact of the design parameters on the deployment of flexible
reuse and suggests the optimal range of parameters where the
capacity of flexible reuse is increased significantly when compared
against full reuse.
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