Development of distributed and self-organized physical cell identity assignment schemes for LTE-advanced systems

摘要: A major challenge pertinent to Long Term Evolution (LTE) systems is the development of self-organized PCI assignment solutions. This paper focuses on this and proposes a new distributed solution named Stable Graph Coloring (SGC) scheme. The proposal introduces temporal PCIs sub-range for newly switched eNBs, minimizes impact Neighbor Cell relations (NCRs) inaccuracy re-uses as most possible. It evaluated compared 3 known approaches, namely (GC) approach, LTE standard Nokia-Siemens (NS) by means simulative studies. studies investigate network size capabilities stabilizing systems. Our results show that SGC scheme slightly outperformed NS approach when considering average number conflicts. For utilization ratio, considerably better than important result our realizes capability converge steady state while carefully utilizing (less 70% high densities). Networks with such densities lose their stability employing approach.