Load balancing mechanisms for indoor temporarily overloaded heterogeneous femtocell networks

摘要: Macrocell and small cell deployments self-organizing network (SON) techniques work together to increase indoor cellular capacity ensure better quality of service (QoS). As a consequence uneven local user densities temporal or spatial fluctuations traffic, the may suffer overload situations, which partially degrades performance. Load balancing self-optimization introduces automatic intelligent mechanisms tune parameters in order improve overall This paper proposes novel load methods based on fuzzy logic controllers (FLC) that evaluate temporarily overloaded situations resize coverage areas by an adaptive process adjusting transmission power. To accomplish this goal, classical indicators are analyzed (e.g., call blocking ratio, available radio resources) while simple, although powerful, indicator (not mentioned literature yet) is additionally proposed as system input. related maximum allowed number users femtocell. The have been evaluated compared with realistic scenario.