If a user is moving among base stations (eNBs), handover
is performed to maintain user's connection and its Quality of
Service (QoS). To determine a proper time instant of handover
initiation, signal quality of a serving cell and all cells in user's
neighborhood is measured by a User Equipment (UE) and
reported back to the network. Cells considered for scanning are
included in so called Neighbor Cell List (NCL) [1]. The NCL
is defined for each cell after its deployment to the network.
Once the NCL of the new cell is defined, NCLs of all
neighbors must be updated as well. Besides the definition of
the initial NCL for the new cells, the NCL’s content should be
optimized as large amount of cells in the NCL leads to an
increase in overhead. This is due to the fact that the NCL must
be delivered to all UEs to keep them aware of the
neighborhood for scanning. Furthermore, scanning itself
reduces a time for data transmission and more cells in the NCL
prolong a scanning time [2][3]. Contrary, if the NCL is
incomplete, i.e., some real target cells are missing, the
handover cannot be performed properly and a connection of the
UE can be dropped.