  Dense femtocells are the ultimate goal of the femtocellular network
deployment. Among three types of handovers: femtocell-to-macrocell,
macrocell-to-femtocell, and femtocell-to-femtocell, the latter two are the main
concern for the dense femtocellular network deployment. For these handover
cases, minimum as well appropriate neighbor cell list is the key element for
the successful handover. In this paper, we propose an algorithm to make minimum
but appropriate number of neighbor femtocell list for the
femtocell-to-femtocell handover. Our algorithm considers received signal level
from femto APs (FAPs); open and close access cases; and detected frequencyfrom
the neighbor femtocells. The simulation results show that the proposed scheme
is able to attain minimum but optimal number of neighbor femtocell list for the
possible femtocell-to-femtocell handover.
