Abstract
Self Organizing Network (SON) which includes: Self-configuration, Self-
organization and Self-healing functions are the most important concepts for self-managing
heterogeneous network. However, the concept of self-configuration can be used to solve
various challenges in the femtocell deployment phase and also in the PCIs confusion and
collision problems. However, the proposed solutions for interference mitigation are not
satisfying and need further improvement. Two main reasons identified for this
unsatisfactory, firstly the small number of femtocells used in the simulation scenario which
can lead to high failure probability if applied under real enterprise environment , secondly;
the provided solutions discussed only part of the problem ,i.e. either in co-tier interference
or cross-tier interference but not both. Thus the need arises for stable solution which can
resolve the interference problem for both inter and intra scenarios. In addition among the
tree types of approaches used to solve collision and confusion problems the Nokia Siemens
approach was the best.
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